CN103360965A

CN103360965A - Substrate-free two-sided adhesive tape and manufacturing method thereof, and adhesive tape reel and manufacturing method thereof

Info

Publication number: CN103360965A
Application number: CN2013101115239A
Authority: CN
Inventors: 仓田雄一; 筱田裕文; 大桥仁
Original assignee: Lintec Corp
Current assignee: Lintec Corp
Priority date: 2012-03-30
Filing date: 2013-04-01
Publication date: 2013-10-23
Anticipated expiration: 2033-04-01
Also published as: KR20130111362A; JP2013209495A; KR102035535B1; TW201350527A; JP5912772B2; TWI567121B; CN103360965B

Abstract

Provided is a substrate-free two-sided adhesive tape which inhibits occurrence of reluctant separation. The adhesive tape has a light stripping sheet, a substrate-free adhesive layer and a heavy stripping sheet. One main surface of the substrate-free adhesive layer has a long substrate-free two-sided adhesive tape connected with a stripping surface of the light stripping sheet, the other main surface has a long substrate-free two-sided adhesive tape connected with a stripping surface of the heaving stripping sheet, the stripping force FL of the light stripping sheet and the stripping force FH of the heavy stripping sheet satisfy a formula (1), and a main surface of the light stripping sheet at a stripping agent layer side has adhesive-free areas having no substrate-free adhesive layer laminates at two end parts in a width direction. FH-FL>=10mN/50mm (1).

Description

Without base material two sides adhesion zone and its manufacture method, and adhesion zone spool and its manufacture method

Technical field

The present invention relates to without base material two sides adhesion zone.

Background technology

Be that the two sides of long adhering agent layer has long light stripping film and long heavy stripping film lamination formation respectively without base material two sides adhesion zone.Above-mentioned adhering agent layer is owing to the base material (core) that does not have as support, so be called in this manual " without the base material adhering agent layer ".

Like this without base material two sides adhesion zone, with light stripping film peel off remove after, a surface label without the base material adhering agent layer that will expose invests to-be-adhered object, then will weigh stripping film peels off and removes, that exposes thus is attached at other to-be-adhered object without another surface of base material adhering agent layer, makes between the to-be-adhered object to engage.

The occasion of the state keeping of stretching with length direction without base material two sides adhesion zone is many, therefore in most occasion, take care of as the body that furls that furls at axle, with this state in market circulation.This furls the contacting from the stripping film of different kind without each interarea of base material adhering agent layer without base material two sides adhesion zone in the body, thus since these without furl in the base material adhering agent layer operation the time tension force, pressure is invested without the base material adhering agent layer by these stripping films.

In addition, the what is called in this specification sheets " interarea " has for formation in the face of section's material (as concrete example, can exemplify the base material adhering agent layer, stripping film) of sheet, and area is 2 right faces of maximal phase.Be attaching face without the interarea in the base material adhering agent layer, the interarea in the stripping film is the face that forms without the base material adhering agent layer and the face of face opposition side (opposite face) therewith thereon.

As without the problem in the adhesion zone of base material two sides, can exemplify as when light stripping film is peeled off, can not carry out aptly without gently peeling off of base material adhering agent layer, destroyed etc. without the aggegation of base material adhering agent layer, a part of is upper remaining at light stripping film without the base material adhering agent layer, namely is known as peeling off of inadequate separation bad (also claiming " remaining phenomenon " in this specification sheets)., for being separated reluctantly, this suppressed in the past, and different for the composition that makes the peeling agent layer in the stripping film from two kinds of joining without the base material adhering agent layer, make thus the peeling force different (for example patent documentation 1) of each stripping film.

[look-ahead technique document]

[patent documentation]

[patent documentation 1] TOHKEMY 2010-168425 communique

But so the adjustment of the composition of peeling agent layer according to the composition without the base material adhering agent layer, is necessary the composition of each peeling agent layer is carried out optimization.In addition, as following, only the composition of peeling agent layer is adjusted, the occasion that can not suppress inadequate separation is arranged.

Therefore, purpose of the present invention is to provide a kind of and effectively suppress without inadequate new means of separating in the adhesion zone of base material two sides.

Summary of the invention

The result that the inventor studies inadequate separation has following discovery.

In addition, in this specification sheets, in the adhesion zone of base material two sides, the direction that furls of the occasion that furls in the direction in its interarea is called as length direction, and the direction in the interarea that intersects vertically of length direction is called cross direction therewith.And then the direction that intersects vertically with the both sides of length direction and width is called cross-wise direction.

(A) separation has following two types reluctantly.

I) separate reluctantly the part

Be the main inadequate separation that occurs without the field beyond the width end of base material adhering agent layer, in the little occasion generation of difference to the peeling force of the peeling force of the light stripping film that carries out clamping without the base material adhering agent layer and heavy stripping film.Local separate reluctantly produce without the concept map of base material two sides adhesion zone as shown in Figure 9.As Fig. 9 (a) and (b) in the expression, as will be without the light stripping film 51 of base material two sides adhesion zone 50 from peeling off without base material adhering agent layer 52, along with separating between light stripping film 51 and the heavy stripping film 53, the formation between these stripping films is pulled open without the tackiness composition 52a of base material adhering agent layer 52.One section can not peel off at light stripping film 51 with on without the interface of base material adhering agent layer 52, and the aggegation of the inside of tackiness composition 52a is destroyed.At this moment, because fracture is remaining on light stripping film 51 at the tackiness composition 52a of light stripping film 51 sides, become the remaining tackiness agent 52b of local shape.

In addition, in this specification sheets, so-called " peeling force of light stripping film ", refer to thickness be 38 μ m light stripping film and the thickness 25 μ m of the release surface superimposed layer of this light stripping film to make the thickness of its release surface without the face superimposed layer of the opposition side of the light stripping film of base material adhering agent layer therewith without the base material adhering agent layer be that the length (being also referred to as " width " in this specification sheets) of width of the heavy stripping film of 38 μ m is measured for the light peeling force of the multilayer body of 50mm and used multilayer body, under the condition of 23 ℃ of relative humidity 50%, carry out 180 ° and pull open method, the peeling force when light stripping film is peeled off.In addition, so-called " peeling force of heavy stripping film ", refer to replace with the polyester film of thickness 25 μ m and the heavy peeling force mensuration multilayer body that obtains with above-mentioned light peeling force being measured with the light stripping film in the multilayer body, under the condition of 23 ℃ of relative humidity 50%, carry out 180 ° and pull open method, the peeling force when heavy stripping film is peeled off.In addition, the measuring method of these peeling forces comprises the manufacture method of measuring with multilayer body, describes in detail in the test example 1 of embodiment.

Ii) separate reluctantly the end

The end is separated into reluctantly, refer to the inadequate separation that occurs in the field of closely being close to without the width end of base material adhering agent layer, is considered to occur owing to following reason.Namely, as representing among Figure 10, without base material two sides adhesion zone 60 without base material adhering agent layer 62, as under the state of

light stripping film

61 and 63 clampings of heavy stripping film, pressurizeing in cross-wise direction, heating, formation can be extruded from the width end without base material two sides adhesion zone 60 without a part of 62a of the tackiness composition of base material adhering agent layer 62.One concrete example of the state that adds for pressure among Figure 10 (a) in addition.The 62b of the tackiness composition 62a that this is extruded, such as expression among Figure 10 (b) like that, the end face of the width end of light stripping film 61 (below, title " width end face ".) the upper expansion of 61a, the interface 64 of the tackiness composition 62b of this width end face 61a and expansion is formed.This width end face 61a, usually, owing to do not carry out special lift-off processing, the tackiness composition 62b of expansion adheres on light stripping film 61 tenaciously on this interface 64.On the other hand, on the heavy stripping film 63, the interface 65 of the tackiness composition 62c of its width end face 63a and expansion is formed, its result, width end without base material two sides adhesion zone 60, light stripping film 61 and without the friction pull between the base material adhering agent layer 62, and heavy stripping film 63 and have equal extent without the friction pull between the base material adhering agent layer 62.At this moment, as when without base material two sides adhesion zone 60 light stripping film 61 being peeled off, the tackiness composition 62b of the upper expansion of the width end face 61a of this light stripping film 61 will be not easy to peel off, as representing among Figure 10, be in without a 62d of the tackiness composition of the width end of base material adhering agent layer 62 by with light stripping film 61 simultaneously pull-ups.Its inner aggegation of tackiness composition 62d of this pull-up is destroyed, or produces on the interface of tackiness composition 62 and heavy stripping film 63 and peel off, and this tackiness composition 62d is remaining on the light stripping film 61, forms the remaining tackiness agent 62e of end.In addition, because the reason that the area at the interface 64 of the tackiness composition 62b of width end face 61a and expansion is large etc., the sticking power to light stripping film 61 of tackiness composition 62b is large, the tackiness composition 62d of pull-up is driven, without base material adhering agent layer 62, the tackiness composition that is in the width center side also is pulled up in light stripping film 61 sides (being upside among Figure 10), the destruction of inside aggegation that is in the tackiness composition of its width center side also can occur, in the large occasion of above-mentioned sticking power, not only the end occurs until the width central part also has inadequate separation.

(B) separate reluctantly about the part, difference to the peeling force (also claiming " weight peeling force " in this specification sheets) of the heavy stripping film of the peeling force of light stripping film (also claiming " light peeling force " in this specification sheets) is more than the 10mN/50mm, the generation of the remaining tackiness agent 52b of local shape can be suppressed unchangeably, as be more than the 20mN/50mm, can further unchangeably it be suppressed.

(C) separate reluctantly about the end, to from without the width end of base material two sides adhesion zone 60, form that to suppress without extruding of a 62a of the tackiness composition of base material adhering agent layer 62 be very difficult.As want to form the adhesion zone spool that body forms that furls by without base material two sides adhesion zone 60 because the tension force that adds on the length direction of band, the stripping film that consists of the outside that furls body certainly can to its inboard without 62 pressurizations of base material adhering agent layer.In addition, without the high occasion of temperature in the keeping environment for use of base material two sides adhesion zone 60, uprise without the flowability of base material adhering agent layer 62.Such occasion, extruding of a 62a of above-mentioned tackiness composition can easier generation.

(D) in order not make such reason that separate reluctantly tackiness composition 62a end that is extruded as, only otherwise the tackiness composition 62a that extrudes is expanded in the end face of the width of light stripping film 61 to be got final product.

(E) for this reason the easiest method one of, be the width both ends that make in the release surface of light stripping film 61, arrange not without base material adhering agent layer 62 lamination fields (below, also claim " without the tackiness agent field ").

Purpose of the present invention can reach by the following technical programs:

1. one kind without base material two sides adhesion zone, has light stripping film, without base material adhering agent layer and heavy stripping film, a described interarea without the base material adhering agent layer has the release surface of described light stripping film to join, another interarea have length that the release surface of described heavy stripping film joins without base material two sides adhesion zone, it is characterized in that:

The peeling force F of described light stripping film _LPeeling force F with described heavy stripping film _HSatisfy following formula (1),

F _H－Ｆ _Ｌ≧10ｍＮ／50ｍｍ（1）

The release surface of described light stripping film at the both ends of width, has and does not have described field without base material adhering agent layer lamination.

In addition, the peeling force of the peeling force of above-mentioned light stripping film and heavy stripping film as above-mentioned, used respectively light peeling force to measure with multilayer body and heavy peeling force mensuration and is measured with multilayer body.

2. above-mentioned 1 is described without base material two sides adhesion zone, and wherein, the release surface of described heavy stripping film has described without base material adhering agent layer lamination in the full field of its width.

3. an adhesion zone spool forms by furling the above-mentioned 1 or 2 described bodies that furl that form without base material two sides adhesion zone.Technique scheme without base material two sides adhesion zone, even when furling at end face direction plus-pressure, have adhesion composition to be extruded from amplitude direction end, the possibility that occurs to separate reluctantly the end on the adhesion spool can be reduced.

4. manufacture method without base material two sides adhesion zone, it is above-mentioned 1 described manufacture method without base material two sides adhesion zone, it is characterized in that: comprise

On the release surface in light stripping film or heavy stripping film, thus will have the width narrower than the width of described release surface a plurality of length without the base material adhering agent layer operation that forms adhering agent layer is set with interval mutually;

On the interarea that exposes without the base material adhering agent layer of described a plurality of length that described adhering agent layer formation operation forms, another release surface in described light stripping film or the heavy stripping film is attached, thus, the first initial strip that forms the first initial strip forms operation; And

Described the first initial strip that operation obtains will formed by described the first initial strip, block at length direction in the described part that is not held without the base material adhering agent layer that described light stripping film and described heavy stripping film consist of, obtain having the described operation of blocking without base material two sides adhesion zone that does not have described field without base material adhering agent layer lamination at the width both ends of the release surface of described light stripping film.

5. manufacture method without base material two sides adhesion zone, it is above-mentioned 2 described manufacture method without base material two sides adhesion zone, comprising:

To have light stripping film, without base material adhering agent layer and heavy stripping film, have the release surface of described light stripping film to join at described one interarea without the base material adhering agent layer, the second initial strip that has the second initial strip of the length that the release surface of described heavy stripping film joins to be prepared on another interarea forms operation;

The width both ends that formed described the second initial strip that operation obtains by described the second initial strip closely are close to, the first laminated sheet that is formed by described heavy stripping film and described multilayer body without the base material adhering agent layer is in the part of described light stripping film superimposed layer, carry out and to comprise the hemisect of the face of length direction and cross-wise direction as truncation surface from described heavy stripping film side, make thus described the first laminated sheet be separated into the hemisect operation of 3 pieces laminated sheet arranged side by side at width;

And, in 3 pieces of laminated sheets of described the first laminated sheet that is separated by this hemisect operation, 2 pieces of laminated sheets with the width both ends side of described the second initial strip, peel off from described second initial strip and to remove, obtain having at the width both ends of the release surface of described light stripping film and do not have described the described of field without base material adhering agent layer lamination to remove operation without peeling off of base material two sides adhesion zone.

6. manufacture method without base material two sides adhesion zone, it is above-mentioned 2 described manufacture method without base material two sides adhesion zone, comprises

To have heavy stripping film, without base material adhering agent layer and release surface to described peeling force without the base material adhering agent layer than the release surface of described heavy stripping film to described peeling force without the base material adhering agent layer low operation stripping film also, have described operation to join with the release surface of stripping film described without an interarea in the base material adhering agent layer, the 3rd initial strip that has the 3rd initial strip of the length that the release surface of described heavy stripping film joins to prepare on another interarea forms operation;

From being formed by described the 3rd initial strip on described the 3rd initial strip that operation obtains described operation is peeled off with stripping film, thereby obtained making the stripping process of an interarea exposes the described multilayer body that forms without base material adhering agent layer and described heavy stripping film, and

On the described interarea without base material adhering agent layer side of the described multilayer body that is obtained by described stripping process, will than described without the base material adhering agent layer also wide light stripping film attach, itself and release surface are fitted, do not have the described without base material two sides adhesion zone of described field without base material adhering agent layer lamination at the both ends of the width of the release surface of described light stripping film thereby obtain having.

7. the manufacture method of an adhesion zone spool is characterized in that: comprise furling without base material two sides adhesion zone each of above-mentioned 4-6 is described, thereby obtain by the operation that furls the adhesion zone spool that body consists of.

[effect of invention]

Of the present invention is that heavy peeling force is more than the 10mN/50mm to the difference of light peeling force, can separate reluctantly the part thus and suppress unchangeably without base material two sides adhesion zone.

In addition, have or not the tackiness agent field with the width both ends without the interarea of the relative side of base material adhering agent layer at light stripping film place, even so be extruded from the tackiness composition without the width both ends of base material adhering agent layer, its tackiness composition can not reach the width end face of light stripping film only in the upper expansion of release surface of light stripping film.Thus, can suppress unchangeably the carrying out that separates reluctantly without adhesion zone end, base material two sides of the present invention.

Description of drawings

Fig. 1 Fig. 1 is the concept sectional view without the width in the adhesion zone of base material two sides of one embodiment of the present invention.

Fig. 2 Fig. 2 is the part expanded view without the width cross section of the concept of the effect of base material two sides adhesion zone of expression one embodiment of the present invention.

Fig. 3 is to the conceptual flow chart without the first half of first the manufacture method of one of manufacture method of base material two sides adhesion zone of one embodiment of the present invention.(a) arranged, (b) and (C) 3 figure.

The later half conceptual flow chart without first manufacture method of one of base material two sides adhesion zone manufacture method of Fig. 4 one embodiment of the present invention.(d) and (e) two figure are arranged.

The conceptual flow chart without the first half of second manufacture method of one of manufacture method of base material two sides adhesion zone of Fig. 5 one embodiment of the present invention.(a) arranged, (b) and (c) three figure.

The later half conceptual flow chart without second manufacture method of one of base material two sides adhesion zone manufacture method of Fig. 6 one embodiment of the present invention.(a) and (b) two figure are arranged.

The conceptual flow chart without one of concrete example of the 3rd the manufacture method of one of manufacture method of base material two sides adhesion zone of Fig. 7 one embodiment of the present invention.(a) arranged, (b) and (c) three figure.

Another the conceptual flow chart without the concrete example of the 3rd manufacture method of one of manufacture method of base material two sides adhesion zone of Fig. 8 one embodiment of the present invention.(a) arranged, (b), (c) and (d) four figure.

Fig. 9 part is separated into concept sectional view (a) and the oblique drawing (b) without base material two sides adhesion zone of generation reluctantly.

Figure 10 is without the concept map of the inadequate generation that separates in the end in the adhesion zone of base material two sides, (a) be concept sectional view without the pressurized state of base material two sides adhesion zone, (b) be concept sectional view without the state of the adhesion agent composition expansion of the side of the width end of base material two sides adhesion zone, and the part stravismus concept map without base material two sides adhesion zone that (c) separates reluctantly generation for the end.

Embodiment

To the present invention, be elaborated with embodiment.

1. two sides adhesive sheet

Fig. 1 be one embodiment of the present invention without in the adhesion zone of base material two sides, contain the concept map in the cross section (among the present invention, also claiming " width cross section ") of its width.

As representing among Fig. 1, one embodiment of the present invention without base material two sides adhesion zone 10 be, with light stripping film 1, without base material adhering agent layer 2, and the formation of the order lamination of heavy stripping film 3.At this, the release surface of light stripping film 1 is joined with a interarea without base material adhering agent layer 2, and the release surface of heavy stripping film 3 is joined with another interarea without base material adhering agent layer 2.

Below, each integrant is described.

(1) without the base material adhering agent layer

Present embodiment without base material two sides adhesion zone 10 have without base material adhering agent layer 2 lamina for there being the tackiness composition to consist of.There is no particular limitation without the composition of the tackiness composition of base material adhering agent layer 2 for formation.As the tackiness agent of principal constituent, can exemplify rubber series, acrylic acid series, polysiloxane series, the tackiness agent of polyurethane series etc., their a kind of uses also can, two or more uses also can.

If the tackiness agent to above-mentioned acrylic acid series is elaborated, it to be containing functional group monomer and acrylate, and it is principal constituent that other monomers of methacrylic ester etc. carry out the acrylic copolymer that copolymerization obtains.As required, can also further contain solvent, linking agent, adhesion invests agent, filling agent, tinting material, antioxidant, charged preventor, UV light absorber etc.

As containing the functional group monomer, can exemplified by acrylic, methacrylic acid etc. contain carboxylic monomer and vinylformic acid 2-hydroxyethyl ester, methacrylic acid 2-hydroxyethyl ester, the hydroxyl monomer of vinylformic acid 4-hydroxybutyl ester etc.Contain the functional group monomer, all as benchmark (100 quality %), with 0.3-5.0 quality % contain promising preferred as monomer unit take the monomer that consists of acrylic copolymer.Acrylic copolymer, by containing the functional group, with the reaction of linking agent in cohesive force is adjusted, when extruding of tackiness composition suppressed, can improve clinging power and thermotolerance.

Linking agent as using in the tackiness composition has no particular limits, and the selection that suit in the material commonly used in take the material of acrylic acid series as the tackiness composition of principal constituent gets final product, can exemplify polyisocyanate compounds, Resins, epoxy, melamine resin, urea resin, twain-aldehyde compound, the methylol polymkeric substance, the aziridine based compound, metal chelate compound, metal alkoxide, metal-salt etc., preferred polyisocyanate compounds.

From optical characteristics, the viewpoint of the adjustment of mechanical characteristics etc. can contain filling agent.The light that will see through spreads, and for example, in order to make the brightness that all has homogeneous of the expression panel in the liquid crystal display device, the occasion of using the filling agent that is made of micropartical is arranged.As so atomic concrete example, can exemplified by silica, calcium carbonate, aluminium hydroxide, magnesium hydroxide, clay, talcum, the inorganic of titanium dioxide etc. is white pigment; Acrylic resin, polystyrene resin, polyvinyl resin, Resins, epoxy, the transparent or white pigment of the organic system of polyorganosiloxane resin etc. etc.Among them, from obtaining the viewpoint of good optical characteristics, the polysiloxane pearl, Resins, epoxy pearl, poly methyl methacrylate pearl are preferred.Equally, from obtaining the viewpoint of good optical characteristics, micropartical preferably has the spherical shape of light diffusion homogeneous, and median size is 1-10 μ m.In addition, this median size is the particle diameter based on centrifugal sedimentation light transmission method, as this determinator, can exemplify the hole field and make made CAPA-700.

There is no particular limitation without the storage elastic modulus in 23 ℃ of the tackiness composition of base material adhering agent layer 2 (G ').The lower extrusion capacity to end face of spring rate without base material adhering agent layer 2 is more, the tackiness agent that spring rate is lower, and effect of the present invention is more remarkable.Just fitting if consider to attach, and storage elastic modulus (G ') for the 0.001-1MPa degree is preferred, the 0.01-0.2MPa degree is further preferred.In addition, storage elastic modulus (G ') be, make the layer laminate of the tackiness composition of thickness 30 μ m, carry out

Thick columned test film is used the spiral cutback technique, measures under following condition.

Determinator: the braking attitude determination of viscoelasticity device Phys ica MCR of Anton Paar company 300

Cycle: 1Hz

Temperature: 23 ℃

There is no particular limitation without the cross-wise direction length of base material adhering agent layer 2 (below, claim " thickness ").The thicker extrusion capacity to end face of thickness without base material adhering agent layer 2 is more, and the thicker effect of the present invention of thickness is more remarkable.Can suit to set according to purposes, usually, be the above following degree of 250 μ m of 5 μ m.

(2) light stripping film

The light stripping film 1 that has without base material two sides adhesion zone 10 of present embodiment, have light stripping film 1 support gently peel off support 1a and light peeling agent layer 1b.The interarea of the light peeling agent layer 1b side of light stripping film 1 is release surface.

In the present embodiment, the size of the width of light stripping film 1 is than large without the size of base material adhering agent layer 2, be that width is wide, and, the interarea of the light peeling agent layer 1b side of light stripping film 1 (below, title " light peeling agent layer side interarea ") the width both ends of 1c have the field 1d that does not attach without base material adhering agent layer 2,1e.In the present embodiment, this field is known as " without the tackiness agent field ".

To without tackiness agent field 1d, the effect of 1e describes with reference to Fig. 2.

Fig. 2 is, the part expanded view without the width cross section of the concept of the effect of base material two sides adhesion zone 10 of expression an embodiment of the invention.

As representing among Fig. 2, be applied in the occasion of power on the cross-wise direction without base material two sides adhesion zone 10, by the occasion that is extruded from the end face 2A tackiness composition without the width of base material adhering agent layer 2, have above-mentioned without tackiness agent field 1d such as the light peeling agent layer side interarea 1c of light stripping film 1, the tackiness composition 2B that extrudes, only launch without the light peeling agent layer side interarea 1c among the 1d of tackiness agent field at this, can not arrive the width end face 1f of light stripping film 1, so by having this formation, suppressed to the generation that separate reluctantly the end of adhering to cause of the tackiness composition on the width end face 1f of light stripping film 1.

Without in each end of width, tackiness agent field without tackiness agent field 1d, the width of 1e is as long as the tackiness composition 2B that extrudes is no more than without

tackiness agent field

1d, 1e, do not adhere to and can realize on the width end face 1f of light stripping film 1, just there is no particular limitation.The amount of the tackiness composition 2B that extrudes, can be according to without applied pressure on the adhesion zone 10 of base material two sides and atmosphere temperature degree, formation without the composition of the tackiness composition of base material adhering agent layer 2 with and thickness, the kinds of the stripper of the light peeling agent layer of formation of further light stripping film 1 etc. can change.Be accompanied by this change, the tackiness composition 2B that extrudes without tackiness agent field 1d, the width of the width of 1e also can change, and considers the above-mentioned factor, to without tackiness agent field 1d, the setting that suits of the width of 1e gets final product.In general, it is the 1-10mm degree, take 3-7mm as preferred.

Light stripping film 1, if suitable have above-mentioned without

tackiness agent field

1d, 1e, there is no particular limitation for other formation.

The material of gently peeling off support 1a of the support of light stripping film 1 is for there is no particular limitation.Consisted of also passablely by the material of resin system, consist of also passable by the material of paper system.The resin kind of the occasion that is made of the material of resin system is any, can exemplify polyethylene terephthalate, poly terephthalic acid fourth glycol ester, the polyester of poly-ethylnaphthalene dicarboxylic acid esters etc., polyethylene, polypropylene, polyvinyl chloride-based, polyvinylidene dichloride, polyvinyl alcohol, ethylene vinyl acetate copolymers, polystyrene, polycarbonate, polymethylpentene, polysulfones, polyether-ether-ketone, polyethersulfone, polyphenylene sulfides, polyetherimide, imide, fluoro-resin, polymeric amide, acrylic resin, norbornene resin, cyclic olefin resins etc.Gently peel off the material of the resin system of support 1a, consisted of also passablely by their kind, consist of also passable with a plurality of kinds.

Gently peel off support 1a and be the concrete example of the occasion that the material of paper system consists of, can exemplify Ge Laxin paper, White Board, the paper base material of upper matter paper etc., and the laminated paper that on the above-mentioned paper base material thermoplastic resin of polyethylene etc. is carried out lamination.

From the viewpoint that optical characteristics (visuality) and mechanical characteristics are adjusted, gently peel off support 1a and be, can contain filling agent granular and the staple fibre shape, also can contain pigment and dyestuff.

There is no particular limitation gently to peel off the thickness of support 1a.But excessive thin occasion, overburden operation is poor, and excessively thick occasion is unfavorable from the viewpoint of economy, suits to set to get final product.Usually its thickness is 20-250 μ m degree.

Gently peel off the formation remover combination (below, claim " light remover combination ") of the light peeling agent layer 1b that forms on the interarea of support 1a, as long as to demonstrating light separability without base material adhering agent layer 2, it forms, and just there is no particular limitation.Can be with polysiloxane series, fluorine system, the resin material of chain alkyl system etc. is as principal constituent, and among them, cheap and the resin material of polysiloxane series with stable performance is for preferred.As its concrete example, can in the end of molecule and/or side chain, have the thiazolinyl of carbon number 2-10, and not have in the polysiloxane of aryl, can add linking agent and catalyst.Thiazolinyl as the carbon number 2-10 in this polysiloxane (polyorganosiloxane resin) is vinyl, hexenyl, and octenyl base etc., vinyl, hexenyl is for particularly preferably.As above-mentioned linking agent, can exemplify and have 2 linking agents with the polysiloxane of the hydrogen atom (hydrogen silyl) of silicon atom bonding in 1 molecule at least.Specifically, dimethyl hydrogen siloxy end-blocking dimethylsiloxane methylhydrogensiloxacopolymer copolymer, the dimethylsiloxane methylhydrogensiloxacopolymer copolymer of trimethylammonium silyloxy end-blocking, TMS end-blocking methylhydrogenpolysi,oxane, polyhydric sesquisiloxane etc.The amount of linking agent, to polyorganosiloxane resin 100 mass parts, for the 0.1-100 mass parts is preferred, the 0.3-50 mass parts is further preferred.In addition, the number of the hydrogen atom of bonding on the Siliciumatom that contains in the linking agent to the number of the thiazolinyl in the polyorganosiloxane resin, is the 1.0-5.0(mol ratio) be preferred, the 1.2-3.0(mol ratio) be further preferred.As above-mentioned catalyst, can exemplify the platinum based compound.As the example of platinum based compound, can exemplify finely particulate platinum, the finely particulate platinum that adsorbs on the carbon powder carrier, the acid of chlorine platinum, pure modification chlorine platinum acid, the alkene ligand of chlorine platinum acid, palladium, rhodium catalyst etc.The platinum group metal metal is catalyst, and usually, to the total amount of polyorganosiloxane resin and linking agent, platinum is that metal is 1-1000 quality ppm degree.

Light peeling agent layer 1b to the peeling force without base material adhering agent layer 2, namely, light peeling force is, as following, will be to define in the relation of counterweight peeling force in the peeling force to without base material adhering agent layer 2 of counterweight peeling agent layer 3b, there is no particular limitation as independent peeling force, from making the stable viewpoint of light separability, take below the above 100mN/50mm of 0mN/50mm as preferred, take below the above 50mN/50mm of 5mN/50mm for further not preferably.

In addition, there is no particular limitation to method that the peeling force of light stripping film 1 is adjusted, can exemplify the method that following factor is controlled.

Consist of the kind (polysiloxane series, fluorine system, chain alkyl system etc.) of the resin material of light remover combination principal constituent

Consist of the molecular weight of resin material of the principal constituent of light remover combination

The cross-linking density of light remover combination (kind that this cross-linking density is subjected to linking agent with and the amount of crosslinking reaction before carrying out, with the functional group of linking agent reaction have an impact such as density.）

The added ingredients that contains in the light remover combination is (specifically, not crosslinked and/or be difficult to crosslinked low molecular monomer.）

The thickness of light peeling agent layer 1b

Light peeling agent layer 1b and surface roughness without the binding face of base material adhering agent layer 2

Gently peel off the thickness of support 1a

Gently peel off the pliability (flexible) of support 1a

Formation is without the kind of the tackiness agent of base material adhering agent layer 2

In addition, the peeling force of following heavy stripping film 3 also can by to controlling with the same factor of the related factors of the peeling force of above-mentioned light stripping film 1, be adjusted.

Gently peel off between support 1a and the light peeling agent layer 1b, the lamination that carries out bottom is also passable.Bottom can exemplify the mixture of organo-aluminium compound and silicoorganic compound.Three (acetylacetic ester) aluminium can be exemplified as organo-aluminium compound, γ-methacryloyl propyl trimethoxy silicane can be exemplified as silicoorganic compound.By the setting of such bottom, even can in the bad occasion of adherence of gently peeling off support 1a and light peeling agent layer 1b, the adherence between them can be improved.

In addition, bottom can exemplify metal alkoxide and/or metal alkoxide and partly add water decomposition thing condensation polymer and consist of.Such bottom has charged preventing effectiveness, without furl the occasion that body form of base material two sides adhesion zone 10 for the axle shape, and when furling pulling out without base material two sides adhesion zone 10 of body formation from this, can preventing static gas.

In addition, the light stripping film 1 of present embodiment is, by gently peeling off support 1a and light peeling agent layer 1b consists of, as long as at least one interarea is the tabs material of length with release surface of light separability, the formation that light stripping film 1 has other is also passable.Can exemplify, gently peel off support 1a from as having light separability, only also passable by gently peeling off the light stripping film 1 that support 1a consists of.

(3) heavy stripping film

The heavy stripping film 3 that has without base material two sides adhesion zone 10 of present embodiment comprises, the support of heavy stripping film 3 heavily peel off support 3a and, heavily peel off the heavy peeling agent layer 3b that consists of among the support 3a and the interarea without the relative side of base material adhering agent layer 2.The interarea of the heavy peeling agent layer 3b side in the heavy stripping film 3 is release surface.

The width dimensions of heavy stripping film 3 and be without the pass of the width dimensions of base material adhering agent layer 2, heavy stripping film 3 is will be fully capped on width without base material adhering agent layer 2, namely, the width size of heavy stripping film 3＞=without satisfied the getting final product of width dimensions relation of base material adhering agent layer 2, having like that of light stripping film 1 is necessary especially without the tackiness agent field at the width both ends.Particularly, the width dimensions of heavy stripping film 3=be satisfied as preferably without the relation of the width dimensions of base material adhering agent layer 2.If any such formation, just can obtain the two sides adhesive sheet with the second manufacture method or the 3rd manufacture method of following two sides adhesive sheet.

As the material of heavily peeling off support 3a of the support of heavy stripping film 3 for there is no particular limitation.It is same with the occasion of gently peeling off support 1a in detail, and the description thereof will be omitted.

Also there is no particular limitation heavily to peel off the thickness of support 3a.Same with the occasion of gently peeling off support 1a, the setting that suits gets final product, and its thickness is 20-250 μ m degree usually.

Heavily peel off the formation of the heavy peeling agent layer 3b that forms on the interarea of support 3a remover combination (below, also claim " heavy remover combination ".), as long as heavy peeling force F _H(heavy peel ply 3b to the peeling force without base material adhering agent layer 2) and light peeling force F _L(light peeling agent layer 1b is to the peeling force without base material adhering agent layer 2) satisfies the relation of following formula (1), is exactly arbitrarily.

Ｆ _Ｈ－Ｆ _Ｌ≧10ｍＮ／50ｍｍ（1）

Heavy peeling force F _HWith light peeling force F _LWhen satisfying the concerning of above-mentioned formula (1), the local generation that separates reluctantly just can be suppressed unchangeably.From the viewpoint that the carrying out that the part is separated reluctantly further suppresses unchangeably, the right of above-mentioned formula (1) take 20mN/50mm for preferably, with 30mN/50mm for particularly preferably.

Heavy peeling force F _HThere is no particular limitation separately, but the viewpoint from the heavy separability that obtains stabilizing, take below the above 300mN/50mm of 10mN/50mm as preferred, the above 200mN/50mm of 20mN/50mm is following further preferred, and the above 150mN/50mm of 40mN/50mm is following to be further preferred.

In addition, heavily peel off support 3a and heavy peeling agent layer 3b and between, also can carry out lamination with stratum basale.Its stratum basale detailed and that gently peel off between support 1a and the light peeling agent layer 1b is same, and the description thereof will be omitted.

In addition, the heavy stripping film 3 of present embodiment is, by heavily peeling off support 3a and heavy peeling agent layer 3b consists of, as long as at least one interarea is the tabs material of length with release surface of heavy separability, heavy stripping film 3 is that other formation is also passable.For example, heavily peel off support 3a from as having heavy separability, also can be only to consist of heavy stripping film 3 also passable by heavily peeling off support 3a.

2. the manufacture method of two sides adhesive sheet

As long as present embodiment has above-mentioned characteristic without base material two sides adhesion zone 10, just there is no particular limitation for its manufacture method, but as make with following manufacture method, can stabilize and make efficiently without base material two sides adhesion zone 10.

(1) first manufacture method

The first manufacture method of present embodiment has, and comprises that the adhering agent layer of following explanation forms operation, and the first initial strip forms operation, and cuts off operation.

Below, with reference to Fig. 3 and 4, to being elaborated in each operation.Fig. 3 and 4 is, the conceptual flow chart without first manufacture method of one of method of the manufacturing of base material two sides adhesion zone 10 of one embodiment of the present invention.

(A) adhering agent layer forms operation

Adhering agent layer forms operation, at long light stripping film 1(by gently peeling off support 1a and light peeling agent layer 1b consists of) or long heavy stripping film 3(consist of by heavily peeling off support 3a and weighing peeling agent layer 3b.) a peeling agent layer, namely on the interarea of light peeling agent layer 1b or heavy peeling agent layer 3b, mutually being formed with interval without the base material adhering agent layer of a plurality of length with width narrower than the width of this interarea arranged.

Among Fig. 3 (a), as a concrete example, on the interarea 1c of the light peeling agent layer 1b side of long

light stripping film

1,3 are long without base material adhering

agent layer

2,2 ', 2 " mutually form with interval.That is, on the interarea 1c of long light stripping film 1, without base material adhering

agent layer

2,2 ', 2 " become striated to form.

At this moment, near the width end of light stripping film 1 without the end side of base material adhering agent layer without base material adhering agent layer 2; 2 " the end of width end side of light stripping film 1 and the width end of light stripping film 1 between, be provided with without tackiness agent field 1d, 1e.In addition, article 3, without among the base material adhering agent layer, be positioned at central part without the end of 2 ' width of base material adhering agent layer and end side without base material adhering

agent layer

2,2 " the end of opposition side of width end side between also be provided with without

tackiness agent field

1g, 1h.

So, the method without the concrete formation of base material adhering agent layer striated of upper many strip of the interarea 1c of long light stripping film 1 is unqualified.For example, can spue on the interarea 1c of long light stripping film 1 with the tackiness composition that device for discharging fixed will consist of without the base material adhering agent layer, the device for discharging fixed of this tackiness composition can be made of ink gun as required.

(B) the first initial strip forms operation

Form operation according to above-mentioned adhering agent layer, a plurality of length without base material adhering

agent layer

2,2 ', 2 " an

interarea

2a, 2a ', 2a " attach another

interarea

2b, 2b ', 2b at long light stripping film 1 " be in the state that exposes.The interarea 2b that exposes side, 2b ', 2b " be attached at by on the interarea 3 of the heavy peeling agent layer 3b that heavily peels off the heavy stripping film 3 that support 3a and heavy peeling agent layer 3b consist of (Fig. 3 (b)).Its result, between long light stripping film 1 and heavy stripping film 3, form 3 strip without base material adhering

agent layer

2,2 ', 2 " initial strip 20(Fig. 3 (c) of first of being held with mutual spaced state).

(C) block operation

Above-mentioned the first initial strip forms first the initial strip 20 that obtains in the operation, formed by light stripping film 1 and heavy stripping film 3, without base material adhering agent layer 2,2 '; 2 " the part that is not held (in other words, with light stripping film 1 without tackiness agent field 1g, the part that 1h is corresponding), blocked (Fig. 4 (d)) at length direction.Each long cut off

machine

21,21 ', 21 that its result obtains "; by the length of long light stripping film 1 and long heavy stripping film 3 clampings without base material adhering

agent layer

2,2 ', 2 " form, the interarea without base material adhering agent layer 2 sides in the light stripping film 1 at the width both ends, becomes and has without

tackiness agent field

1d, 1g ', 1g ", 1h '; 1h ", 1e without base material two

sides adhesion zone

21,21 ', 21 " (Fig. 4 (e)).

Because the reason on the producing apparatus etc., even the width at initial strip is the occasion of length (for example 1m) to a certain degree, according to the first above-mentioned manufacture method, as long as the width than the first initial strip 20 is narrow, will obtain arbitrarily width (for example 20cm, 30cm etc.) without base material two sides adhesion zone 10.

(2) second manufacture method

Second manufacture method of present embodiment has second the initial strip that the following describes and forms operation, hemisect operation and peel off and remove operation.

Below, with reference to Fig. 5 and 6, each operation is elaborated.Fig. 5 and 6 is the conceptual flow chart without the second manufacture method of one of the manufacture method of base material two sides adhesion zone 10 as an embodiment of the invention.

(A) the second initial strip forms operation

The second initial strip forms in the operation, makes by long light stripping film 1(by gently peeling off support 1a and light peeling agent layer 1b consists of.) and long heavy stripping film 3(by heavily peeling off support 3a and weight peeling agent layer 3b consists of.) second initial strip 30 that consists of without base material adhering agent layer 2 of length of clamping.

At this, without two interareas of base material adhering agent layer 2, respectively with light stripping film 1 in the interarea of light peeling agent layer 1b side and the interarea of the heavy peeling agent layer 3b side in the heavy stripping film 3 join (Fig. 5 (a)).The manufacture method of this second initial strip 30 is any.On the interarea of the heavy peeling agent layer 3b side in the heavy stripping film 3, will be without the coating of the tackiness composition of base material adhering agent layer 2, the face that exposes of the coating layer that obtains is attached at the interarea of the light peeling agent layer 1b side of light stripping film 1 and also can.On the interarea of the light peeling agent layer 1b of light stripping film, with the coating of tackiness composition, attach the interarea of the heavy peeling agent layer 3b side of exposing face and heavy stripping film 3 of the coating layer that obtains also passable.

In addition, give with the coating process without the tackiness composition of base material adhering agent layer 2 any.As its concrete example, the notch board coating method is arranged, barcode method, spraying coating method, spin-coating method, scraper for coating method, roller coating method, mould coating method etc.

In addition, the width both ends of the second initial strip 30 are common, cut off at the face that contains its length direction and cross-wise direction, obtain level and smooth end face 30a, 30b.Although this

end face

30a, 30b are not to be even surface, consider workability, are preferably even surface.In addition, from improving the viewpoint of workability, for the length direction of the second initial strip 30, cut off also passable with suitable length (number volume degree).

(B) hemisect operation

In the hemisect operation, 30c closely is close at the width both ends that form the second initial strip 30 that obtains in the operation at the second above-mentioned initial strip, 30d, the 30e of first laminated sheet 31 that will form by heavy stripping film 3 and without the multilayer body of base material adhering agent layer 2, the part of 30f is carried out hemisect (Fig. 5 (b) from heavy stripping film 3 sides, (c)), be formed on 3 pieces the laminated sheet 31a that juxtaposition is separated on the first laminated sheet 31 widths, 31b, 31c.At this, so-called " hemisect " is not the second initial strip 30 all to be blocked (that is, can separate possible cut-out), although the first laminated sheet 31 be truncated,, light stripping film 1 is not truncated.

So, in the second manufacture method, without the final width of base material adhering agent layer, in the hemisect operation, determined.On the other hand, in the first manufacture method, what have that interarea at long light stripping film contains a plurality of length is formed operation mutually with interval without the base material adhering agent layer.But, in the first manufacture method, form stage of operation at initial strip, the necessity that determines without the final width of base material adhering agent layer is arranged pair.In the second manufacture method, initial strip forms operation, is not determined without the final width of base material adhering agent layer, makes the large initial strip of width, carries out thereafter hemisect, obtains having the desired width without the base material adhering agent layer.In other words, form operation to the hemisect operation from initial strip, the guarantor is stayed in the decision without the final width of base material adhering agent layer.For this reason, from the viewpoint of circulation control, the second manufacture method is good.

As following, the width end face 30a(30b of the second initial strip 30) and at the width both ends closely be close to 30c(30d) the part 30e(30f that carries out hemisect that locates) distance, the length without the width in tackiness agent field without in the base material two sides band that obtains with the second manufacture method is suitable.

(C) peel off and remove operation

Remove in the operation peeling off, by the enforcement of having carried out the hemisect operation, first laminated sheet 31 is separated into 3 pieces laminated

sheet

31a, 31b, 31c, wherein, 2 pieces of laminated sheet 31a of the width both ends side of the initial strip 30 with second, 31c, the initial strip 30 from second peel off and remove (Fig. 6 (a)).Its result only has the laminated sheet 31b that is in central part to retain on the light stripping film 1.In addition, in the above-mentioned hemisect operation, prune at both ends at second the initial strip 30 that at once just carries out hemisect, thus, peel off and remove in the operation, be in 2 pieces the laminated sheet 31a at the both ends of the second

initial strip

30,31c peels off when removing, the possibility step-down of the generation that separate reluctantly the end.

The multilayer body that the laminated sheet 31b that so obtains and light stripping film 1 consist of, namely form have light stripping film 1 the width both ends without

tackiness agent field

1d, 1e without base material two sides adhesion zone 10(Fig. 6 (b)).

(3) the 3rd manufacture method

The 3rd manufacture method of present embodiment, different from the second manufacture method (namely not having the hemisect operation), it is the method for making without the base material two sides band that the width without the width of base material adhering agent layer 2 and heavy stripping film 3 is equated, the 3rd initial strip with following explanation forms operation, prune operation, stripping process and attaching operation.

Below, with reference to Fig. 7 and 8, each operation is elaborated.Fig. 7 and 8, the conceptual flow chart without 2 concrete examples of the 3rd manufacture method of one of method of the manufacturing of base material two sides adhesion zone 10 of one embodiment of the present invention.

(A) the 3rd initial strip forms operation

The 3rd initial strip forms in the operation, at first, to formed by long stripping film without in the peeling force proportion stripping film 3 in the base material adhering agent layer 2 without the peeling force of base material adhering agent layer 2 also low operation prepared with stripping film 4.Make the stripping film 4 that this operation is used, long without base material adhering agent layer 2 and long heavy stripping film 3 the 3rd initial strip 40(Fig. 7 (a) with this multilayer body that sequentially is configured).The concrete method that obtains this 3rd initial strip 40 is arbitrarily.Can will form without the tackiness composition of base material adhering agent layer 2 in operation with stripping film 4 coatings, it is also passable to make heavy stripping film 3 carry out lamination; The tackiness composition that forms without base material adhering agent layer 2 is coated with at heavy stripping film 3, makes operation also passable with stripping film 4 further laminations.

(B) stripping process

In stripping process, the operation that forms the 3rd the initial strip 40 that obtains the operation from above-mentioned the 3rd initial strip is peeled off with stripping film 4, obtains the multilayer body 41(Fig. 7 (b) that forms without base material adhering agent layer 2 and heavy stripping film 3 that is exposed by interarea 2b).The 3rd initial strip 40 is the occasion of reel etc., and in the operation of the multilayer body 41 that the initial strip 40 by the 3rd obtains, the end is separated the possibility that generation is arranged reluctantly.But, before operation is peeled off with stripping film 4, by the both ends of the 3rd initial strip 40 are pruned, can make the reluctantly possibility attenuating of the generation of separation of end.

(C) attach operation

Attach in the operation, on the interarea without base material adhering agent layer 2 sides in the multilayer body 41 that in above-mentioned stripping process, obtains, with attaching without the large light stripping film 1 of base material adhering agent layer 2 and width of multilayer body 41, the width both ends that obtain light stripping film 1 have without

tackiness agent field

1d, 1e without base material two sides adhesion zone 10(Fig. 7 (c)).

Multilayer body 41 to the sticking position without the light stripping film 1 of base material adhering agent layer 2, and multilayer body 41 there is no particular limitation without the relation of the width of the width of base material adhering agent layer 2 and light stripping film 1.The relation that can consider this sticking position and width is to without tackiness agent field 1d, and the length of the width of 1e suits to set.

(D) prune operation

In addition, carry out pruning operation at stripping process and attaching between the operation, the operation of using in the 3rd initial strip 40 can be general with stripping film 4 and light stripping film 1.

Prune in the operation, to form represent among the 3rd initial strip 40(Fig. 8 (a) that obtains in the operation such at the 3rd above-mentioned initial strip, as operation stripping film 4, use light stripping film (1), light stripping film 1 is peeled off, obtained the multilayer body 41 that consists of without base material adhering agent layer 2 and heavy stripping film 3 of being exposed by an interarea 2b.The part 41a that closely be close to each end of the width of this multilayer body 41,41b are cut off (Fig. 8 (b)) at length direction, make the narrowed width (Fig. 8 (c)) of multilayer body 41.Then, as attaching operation, will be at the thing of peeling off of above-mentioned operation, the light stripping film 1(operation stripping film 4 of not pruning on the width), above-mentioned pruning without base material adhering agent layer 2 in an interarea 2b exposing attach again, the width both ends of light stripping film 1 have without

tackiness agent field

1d, and 1e is obtained (Fig. 8 (d)) without base material two sides adhesion zone 10.

3. adhesion zone spool

Present embodiment without base material two sides adhesion zone 10, although can be the state that stretches at length direction,, the state that furls body after furling as the axle shape is also passable.This furls body, and namely the adhesion zone spool has the advantage of the keeping of being easy to.On the one hand, when the axle shape furls, based on give with the tension force of length direction, in the adhesion zone spool without in the base material two sides adhesion zone 10 without base material adhering agent layer 2, light stripping film 1 and heavy stripping film 3 are further pressurizeed.Thus, the tackiness composition that consists of without base material adhering agent layer 2 occurs to flow easily, extrudes from the end without the width of base material two sides adhesion zone 10.Even in such occasion, present embodiment also be difficult for occuring in the inadequate separation of end without base material two sides adhesion zone 10.

4. purposes

Present embodiment there is no particular limitation without the purposes of base material two sides adhesion zone 10, still owing to be difficult to occur based on the unusual part of inadequate separation without the part of the segmental defect of base material adhering agent layer 2 and thickness, so be suitable for optical applications etc.As concrete example, there is polarisation to wait the adhering agent layer that attaches with other photopermeability base material, the gas gap that thick tackiness agent is used adhering agent layer, the parts attaching of electronic unit is with adhering agent layer etc.

Embodiment described above is for the present invention is understood, and is unqualified to the present invention.But the design alteration of the scope of the technology of the present invention of each key element in the above-mentioned embodiment and equivalent also belong to reaction of the present invention.For example, in the above description, light stripping film 1 and heavy stripping film 3, all be by

support

1a, 3a and peeling

agent layer

1b, 3b consists of, the release surface of light stripping film 1 and heavy stripping film 3 is by peeling agent layer 1b, the face of 3b consists of, but the release surface of light stripping film 1 and heavy stripping film 3 is by

support

1a, and 3a consists of also can.In this occasion, because the difference of the rugosity of molecule orientation and face etc., with support 1a, the cross section of the release surface orthogonal among the 3a is different from release surface, becomes the occasion of the face of strong adhesion power is arranged without base material adhering agent layer 2 so have.

[embodiment]

Below, with reference to embodiment etc. the present invention is further specifically described, but scope of the present invention is not limited to these embodiment.

(embodiment 1)

(1) modulation of coating fluid

Tackiness agent main component take (methyl) acrylic ester polymer as principal constituent is (with butyl acrylate cores, the vinylformic acid isobutyl, vinylformic acid is as the monomer component of using in the polymerization, they carry out copolymerization by this order with the mass ratio of 49.125:49.125:1.75 and the multipolymer that obtains, solids component 32 quality %) 100 mass parts, isocyano-and be linking agent (trimethylolpropane adduct dimethylbenzene two isocyano-esters, solids component 37.5 quality %) 1 mass parts and mix as methyl ethyl ketone 30 mass parts of solvent obtains the coating fluid of tackiness composition.

(2) making of initial strip

The stripping film (SP-PET382150 processed of Lin Deke company, the long 1000mm of width) of peeling agent layer that is formed with the polysiloxane series of thickness 0.1 μ m on the interarea with the polyethylene terephthalate base material film processed of thickness 38 μ m is prepared as heavy stripping film.In addition, the stripping film (SP-PET382120 processed of Lin Deke company, the long 1000mm of width) of the peeling agent layer of the polysiloxane series of formation thickness 0.1 μ m is prepared as light stripping film on the interarea of the polyethylene terephthalate base material film processed of thickness 38 μ m.

Be coated with the roller knife coater at the interarea of the peeling agent layer side of the above-mentioned heavy stripping film coating fluid with above-mentioned tackiness composition, forming the tackiness agent width is the coating layer of 980mm, 90 ℃, 1 minute drying, obtain thickness 25 μ m without the base material adhering agent layer.Thus on the interarea without base material adhering agent layer side without base material adhering agent layer and the multilayer body of heavy stripping film formation, the interarea of the peeling agent layer side of above-mentioned light stripping film is fitted, obtain with heavy stripping film, without base material adhering agent layer and the light stripping film multilayer body of arranged in order for this reason.

After the width both ends of this multilayer body were pruned, its width was 860mm, and the multilayer body after further this being pruned is carried out 4 at length direction and cut apart cut-out, obtained thus 4 of the second initial strips of width 215mm.Prune thus, the end face of the width of the second initial strip, the two sides all consists of the cross section of heavy stripping film, without the cross section of the cross section of base material adhering agent layer and light stripping film order.

(3) post-treatment

To 4 the second initial strip that so obtains, carry out hemisect with the pushing blade at length direction from the interarea in its heavy stripping film side respectively, the second initial strip is all formed at light stripping film, the multilayer body of the long 205mm of width that consists of by stripping film with without the base material adhering agent layer (below, claim " center side multilayer body ") and be positioned on the width of the second initial strip of this multilayer body by stripping film and two multilayer body forming without the base material adhering agent layer (below, claim " end side multilayer body "), separate with light stripping film.

Two the end side multilayer body of separating in the hemisect peeled off from second initial strip remove, to obtain as the remnants of defeated troops, by furling without base material two sides band (without the width in tackiness agent field for all being 5mm) that the multilayer body of center side multilayer body (the long 205mm of width) and stripping film consists of, obtain the adhesion zone spool.In addition, the tension force when furling is 10N, and the length of length direction is that 300m(is following identical).

(embodiment 2)

With embodiment 1 and same, coating fluid and heavy stripping film and light stripping film are prepared.

On the interarea of the peeling agent layer side of above-mentioned heavy stripping film, the coating fluid of above-mentioned tackiness composition is coated with at length direction with the roller knife coater, what obtain the tackiness agent width and be 205mm is coated with 4 of liquid layers, is divided into 10mm between each.This is coated with liquid layer and carries out 90 ℃, after 1 minute drying, obtain 4 of thickness 25 μ m without the base material adhering agent layer.

These 4 without the base material adhering agent layer with mutually with interval on the interarea without base material adhering agent layer side in the multilayer body that heavy stripping film forms, the interarea of the peeling agent layer side of above-mentioned light stripping film is fitted, with heavy stripping film, order without base material adhering agent layer and light stripping film is carried out lamination, with this initial strip as the first initial strip system.

(in other words the interarea of the peeling agent layer side of the interarea of the peeling agent layer side of the heavy stripping film of this first initial strip and light stripping film is exposed, do not attach without the base material adhering agent layer) partly as cutting portion, and the first initial strip is blocked from length direction, width is the heavy stripping film of 215mm, width 205mm's is the light stripping film lamination in this order of 215mm without base material adhering agent layer and width, the width both ends that obtain having light stripping film closely be close to without tackiness agent field (length of width for be 5mm all) without 4 of base material two sides bands.Obtaining will be without 4 the adhesion zone spool that furls respectively of base material two sides band.

(embodiment 3)

Second initial strip (width 215mm) that will obtain with the method for embodiment 1 is peeled off the light stripping film in this 3rd initial strip as the 3rd initial strip, obtain that an interarea exposes by the multilayer body that forms without base material adhering agent layer and heavy stripping film.The width both ends of this multilayer body are pruned, obtain the multilayer body that width is 205mm.On the multilayer body after this prunes, the interarea of the peeling agent layer side of the above-mentioned light stripping film that will peel off from the 3rd initial strip, be attached at width and be on the interarea without the base material adhering agent layer that the lamination of 205mm exposes, obtain having the both ends width be respectively 5mm without the tackiness agent field without the base material two sides band.Furling without the base material two sides band of obtaining obtained the adhesion zone spool.

(comparative example 1)

The second initial strip of making among the embodiment 1 intactly as without the base material two sides band, is obtained it and furls axle.

(comparative example 2)

In the post-treatment of the second initial strip that makes in embodiment 1, hemisect is carried out in light stripping film side.In this hemisect, cut off with light stripping film and without the base material adhering agent layer.

From the initial strip of hemisect, the light stripping film of the both ends side of the width that separates peeled off remove, the width both ends of the initial strip of hemisect are exposed without an interarea of base material adhering agent layer.On this part without an interarea of base material adhering agent layer of exposing, polyethylene terephthalate (PET) film of thickness 25 μ m is attached.The PET film is peeled off from the initial strip of hemisect.Peel off by this this, the width both ends that hemisect cut off is separated move to the PET film side without the base material adhering agent layer.So, as the remnants of defeated troops of the initial strip of hemisect, the width both ends that obtain having heavy stripping film closely be close to without tackiness agent field (width long for be 5mm all) without the base material two sides band.This is furled without the base material two sides band obtain the adhesion zone spool.

(comparative example 3)

Replace light stripping film, use heavy stripping film, in addition, obtain initial strip with similarly to Example 1 method, with it intactly as without the base material two sides band.With this without the base material two sides band with heavy stripping film, without the base material adhering agent layer, heavy stripping film ground is lamination sequentially.This is furled without the base material two sides band obtain the adhesion zone spool.

(test example 1)

(1) mensuration of light peeling force

With manufacture method similarly to Example 1, make the light peeling force mensuration multilayer body of the long 50mm of width.That is, at an interarea of the polyethylene terephthalate base material film processed of thickness 38 μ m thickness being arranged is that the stripping film (SP-PET382150 processed of Lin Deke company) that forms of the peeling agent layer of the polysiloxane series of 0.1 μ m is as heavy stripping film preparation.In addition, there is stripping film (SP-PET382120 processed of Lin Deke company) that the peeling agent layer of the polysiloxane series of thickness 0.1 μ m forms to be prepared as light stripping film on the interarea with the polyethylene terephthalate base material film processed of thickness 38 μ m.On the interarea of the peeling agent layer side in above-mentioned heavy stripping film, with among the embodiment 1 modulation coating fluid be coated with the roller knife coater, 90 ℃, 1 minute drying, obtain thickness 25 μ m without the base material adhering agent layer.Thus on the interarea without base material adhering agent layer side without base material adhering agent layer and the multilayer body of heavy stripping film formation, the interarea of the peeling agent layer side of above-mentioned light stripping film is fitted, obtain heavy stripping film, without the multilayer body of base material adhering agent layer and light stripping film arranged in order.This multilayer body is blocked, and obtaining width is the light peeling force mensuration multilayer body of 50mm.

Use this light peeling force to measure and use multilayer body, the peeling force (light peeling force) of light stripping film is measured.That is, press JISZ0237, at 23 ℃, under the condition of relative humidity 50%, light peeling force mensuration is implemented tortuous 180 ° with the light stripping film of the stripping film of the mensuration face side in the multilayer body and is peeled off, to light peeling force (unit: mN/50mm) measure.The light peeling force that its result obtains is 73mN/50mm.

(2) mensuration of heavy peeling force

Make in addition light peeling force mensuration multilayer body with above-mentioned method.After the light stripping film of its multilayer body peeled off, make without one of the base material adhering agent layer show out.On this face that exposes, face of polyester film (PET25A4100 processed of company spins in Japan) at thickness 25 μ m attaches, making is with heavy stripping film, without the multilayer body of the arranged in order of base material adhering agent layer and above-mentioned polyester film, it measured as heavy peeling force use multilayer body.Use this heavy peeling force to measure and use multilayer body, the peeling force of counterweight stripping film (heavy peeling force) is measured.Namely, press JISZ0237,23 ℃, under the condition of relative humidity 50%, heavy peeling force is measured heavy stripping film with the stripping film of the mensuration face side of multilayer body carries out 180 ° of complications and peels off and implement counterweight peeling force (unit: mN/50m m) measure.The heavy peeling force that its result obtains is 160mN/50mm.

(test example 2)

The spool that obtains from embodiment and comparative example carries out one one and pulls out, and light stripping film is peeled off.At this moment, whether inadequate separation is occured to observe, separating reluctantly the occasion that occurs, the classification (end, part, both sides) of inadequate separation is confirmed.

The results are shown in table 1.

[table 1]

May learn from table 1, satisfy important document of the present invention, what obtain among the embodiment does not occur without separating reluctantly in the base material two sides band.

[utilizing on the industry possibility]

Of the present invention without the base material two sides band, the applying of optical element may be used well with the purposes of section's material etc.

[explanation of symbol]

10 ... without base material two sides adhesion zone

1 ... light stripping film

1a ... gently peel off support

1b ... light peeling agent layer

1c ... light peeling agent layer side interarea

1d, 1e ... without the tackiness agent field

2 ... without the base material adhering agent layer

3 ... heavy stripping film

3a ... heavily peel off support

3b ... heavy peeling agent layer

1f ... the width end face of light stripping film

2A ... end face without the width of base material adhering agent layer

2B ... the tackiness agent of extruding

20 ... the first initial strip

1g, 1g ', 1g ", 1h, 1h ', 1h " ... without the tackiness agent field

2 ', 2 " ... without base material adhering agent layer (end side is without the base material adhering agent layer, and private side is without the base material adhering agent layer)

2a, 2a ', 2a " ... without the interarea on the other hand in the base material adhering agent layer (end side is without the base material adhering agent layer, and private side is without the base material adhering agent layer)

2b, 2b ', 2b " ... without the interarea of the other party in the base material adhering agent layer (end side is without the base material adhering agent layer, and private side is without the base material adhering agent layer)

3c ... heavy peeling agent layer side interarea

10 ', 10 " ... without base material two sides adhesion zone

21,21 ', 21 " ... the cut off machine (without base material two sides adhesion zone) of the length that the first initial strip obtains after cutting off

30 ... the second initial strip

30a, 30b ... the width end face of the second initial strip

30c, 30d ... closely be close at the width both ends of the second initial strip

30e, 30f ... the part of the feed of the hemisect in the second initial strip

31 ... the first laminated sheet

31a, 31b, 31c ... the first laminated sheet is the laminated sheet of the hemisect carried out from heavy stripping film side

40 ... the 3rd initial strip

4 ... the operation stripping film

41 ... the multilayer body without base material adhering agent layer and heavy stripping film of being exposed by an interarea

50 ... without base material two sides adhesion zone

51 ... light stripping film

52 ... without the base material adhering agent layer

52a ... the tackiness composition

52b ... the remaining tackiness agent of local shape

53 ... heavy stripping film

60 ... without base material two sides adhesion zone

61 ... light stripping film

61a ... the width end face of light stripping film

62 ... without the base material adhering agent layer

62a ... the tackiness composition of extruding

62b ... the tackiness composition 62a that extrudes is at the tackiness composition of light stripping film 61 sides expansion

62c ... the tackiness composition 62a that extrudes is at the tackiness composition of heavy stripping film 63 sides expansion

62d ... be in the part without the tackiness composition of the width end of base material adhering agent layer 62

62e ... the remaining tackiness agent of end

63 ... heavy stripping film

63a ... the width end face of heavy stripping film 63

64 ... the interface of the width end face 61a of light stripping film 61 and the tackiness composition 62b of expansion

65 ... the interface of the tackiness composition 62c of the width end face 63a of heavy stripping film 63 and expansion

Claims

Ｆ _Ｈ－Ｆ _Ｌ≧10ｍＮ／50ｍｍ（1）

2. claimed in claim 1 without base material two sides adhesion zone, wherein, the release surface of described heavy stripping film has described without base material adhering agent layer lamination in the full field of its width.

3. adhesion zone spool is by furling claim 1 or the 2 described bodies that furl that form without base material two sides adhesion zone form.

4. manufacture method without base material two sides adhesion zone, it is the manufacture method without base material two sides adhesion zone claimed in claim 1, it is characterized in that: comprise

Described the first initial strip that operation obtains will formed by described the first initial strip, block at length direction in the described part of not seized on both sides by the arms without the base material adhering agent layer that described light stripping film and described heavy stripping film consist of, obtain having the described operation of blocking without base material two sides adhesion zone that does not have described field without base material adhering agent layer lamination at the width both ends of the release surface of described light stripping film.

5. manufacture method without base material two sides adhesion zone, it is the manufacture method without base material two sides adhesion zone claimed in claim 2, comprising:

To have light stripping film, without base material adhering agent layer and heavy stripping film, have the release surface of described light stripping film to join at described one interarea without the base material adhering agent layer, the second initial strip that has second initial strip of length that the release surface of described heavy stripping film joins to be prepared on another interarea forms operation;

6. manufacture method without base material two sides adhesion zone, it is the manufacture method without base material two sides adhesion zone claimed in claim 2, comprises

7. the manufacture method of an adhesion zone spool is characterized in that: comprise furling without base material two sides adhesion zone each of claim 4-6 is described, thereby obtain by the operation that furls the adhesion zone spool that body consists of.