JP2017217760A - Raw fabric for surface protective cover and manufacturing method of raw fabric for surface protective cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a raw fabric for obtaining a surface protective cover having an adhesive layer at least at an edge part in a width direction, without need for folding or extending a substrate film many time in a manufacturing process, narrower in width than actual surface protective cover and excellent in handling property.SOLUTION: There is provided a raw fabric for surface protective cover consisting of a substrate film and an adhesive layer, the substrate film has a tube shape folded in flat and has an adhesive layer and a cutting means or a nick presenting in a length direction of the raw fabric for surface protective cover on one outer surface of two outer surfaces of the substrate film divided by being folded in flat.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a raw material for a surface protective cover for obtaining a surface protective cover for protecting the surface of an article. Specifically, the present invention relates to an original fabric in which a long film is wound into a roll shape, and the surface protective cover can be obtained by cutting into a desired size, and a method for manufacturing the same.

  Painted vehicle coatings may be damaged, glossy, discolored, etc. by acid rain, bird droppings, stones, dust, iron powder, various gases, chemicals, etc. in the process of transporting, transporting, protecting, etc. May occur and its commercial value may be significantly reduced. In order to solve this problem, painted vehicles are often covered with a surface protective cover. In addition, building materials such as flooring, inner wall materials, outer wall materials, and interior materials such as doors are often used for surface protection covers during storage and transportation in order to prevent dust from adhering to or becoming dirty. .

  Patent Document 1 is an invention relating to a surface protective cover (temporary surface protective film) that temporarily protects the surface of an article such as a paint film of a finished paint vehicle or a metal plate immediately after manufacture. Since the surface protective cover proposed in Patent Document 1 has the re-peelable pressure-sensitive adhesive layer only at both ends in the width direction of the plastic film, it is easy to expand and peel the surface protective cover. This has the advantage that no adhesive residue is likely to occur when the protective cover is peeled off. Moreover, when manufacturing this surface protection cover, since it is not necessary to form an adhesive layer in the whole surface, a big coating apparatus is unnecessary and the quantity of the adhesive to be used can also be restrained small.

The surface protective cover proposed in Patent Document 1 can be manufactured by providing a pressure-sensitive adhesive layer on each of both ends in the width direction of one side of a base film (plastic film). In this manufacturing method, the adhesive film is provided after the base film is spread in a flat state (substantially the same width as the actual surface protective cover), and in order to apply the adhesive to both ends, (1) It is necessary to use one coating facility or (2) pass the film twice through one coating facility.
In Patent Document 1 [0015], when the surface protective cover is wide, a protective film having a pressure-sensitive adhesive layer on both ends of the base film is folded back into two to fold the original fabric (roll). It is stated that the width can be shorter than the actual width of the protective cover. This describes that the base film on which the pressure-sensitive adhesive layer is formed can be folded in half, and there is no description or suggestion about reducing the film width when forming the pressure-sensitive adhesive layer. Absent.

  Patent Document 2 is affixed to concrete surfaces, wooden floors, mortar walls, interior surfaces of buildings under construction, exterior surfaces and roof floor surfaces, and inner and outer surfaces of machines, vehicles, airplanes, automobiles, ships, etc. that are being manufactured. , To prevent dust and dirt in the air from adhering to the surface of the article and causing dirt, or the surface of the article, particularly the concrete surface immediately after placing, the floor surface of the building under construction and the roof floor The present invention relates to a surface protective cover (curing masking film for curing) that can be attached to a surface and allow a person to walk on the ground, and a manufacturing method thereof. The raw material for the surface protective cover proposed in Patent Document 2 is made of a polyethylene resin having a density of 0.89 to 0.935 g / ml and a melt index of 0.5 to 10 g / 10 min, and at least partially embossed. A film in which a pressure-sensitive adhesive tape is bonded so that a part of the pressure-sensitive adhesive layer overlaps with an edge of an inner surface of a film obtained by cutting a tubular film subjected to processing in the longitudinal direction, and the pressure-sensitive adhesive tape is bonded And at least a part of the film is folded substantially parallel to the longitudinal direction, and the film is wound in a roll shape along the longitudinal direction. Since the base film for the surface protective cover is folded, the product is compact and the handling property is excellent.

According to the manufacturing method of the surface protection cover described in Patent Document 2, first, a cut is made in the tubular film, the film is flattened, then the film is folded in parallel to the longitudinal direction, and one side of the tubular film is further developed. The base film is made (rotated), and an adhesive tape is bonded to the edge of the base film to obtain a surface protective cover. According to this manufacturing method, there is no need to spread the tubular film in a flat state (substantially the same width as the actual surface protective cover).
However, according to this manufacturing method, since it is necessary to fold or expand the base film in parallel to the longitudinal direction, and further, it is necessary to bond an adhesive tape, the manufacturing process is complicated. Moreover, this manufacturing method assumes providing an adhesive layer (adhesive tape) only in the one side edge part of a base film, and forms an adhesive layer in the both-sides edge part of a film with this manufacturing method. It is difficult.

Japanese Patent Laid-Open No. 07-016962 Japanese Patent Laid-Open No. 10-265747

  An object of this invention is to obtain the raw material for surface protection covers which are easy to manufacture and excellent in handling property. Specifically, it is a raw fabric for obtaining a surface protective cover having an adhesive layer at least at the edge in the width direction, and it is not necessary to fold or unfold the base film many times in the manufacturing process. An object of the present invention is to obtain a raw material for a surface protective cover that is narrower than the surface protective cover and excellent in handling properties.

According to the present invention, as a means for solving the above-mentioned problems, in the raw material for the surface protective cover comprising the base film and the pressure-sensitive adhesive layer, the base film is in a tube shape folded flat, and is folded flat. The outer surface of one of the two outer surfaces of the base film separated by the adhesive layer is provided with a pressure-sensitive adhesive layer and a cutting means or cut extending in the length direction of the surface protective cover original fabric. An original fabric for a surface protective cover is provided.
In addition, the surface protective cover original fabric is provided, wherein the cutting means or the cut is provided on a base film on which the pressure-sensitive adhesive layer is formed.

In addition, a method for manufacturing the surface protective cover raw fabric, the step of manufacturing a flat base material film that is folded flatly, and one outer surface of the flat base material film that is folded flatly There is provided a method for producing an original fabric for a surface protective cover, comprising: a step of providing an adhesive layer; and a step of cutting or cutting a base film.
Moreover, the said cutting means or a cut | interruption is put on the base film in which the said adhesive layer was formed, The manufacturing method of the said raw material for surface protection covers characterized by the above-mentioned is provided.

The raw material for the surface protective cover of the present invention is a tube shape in which the base film is folded flat, and is about ½ the width of the actual surface protective cover. Therefore, it is easy to carry and extend and has excellent handling properties. Further, since one outer surface (A) of the base film is provided with (1) an adhesive layer and (2) a cutting means or a cut (hereinafter abbreviated as a cutting means), the other without these. While applying the outer surface (B) to the object to be protected, the surface protective cover material is fed out by the desired length, cut in the width direction, and the surface of the object to be protected is simply developed by expanding the tubular substrate film. Can be covered.
When the cutting means is provided on the base film on which the pressure-sensitive adhesive layer is formed (the pressure-sensitive adhesive layer and the cutting means are overlapped), the surface protective cover to be obtained has a pressure-sensitive adhesive layer on both edges. Thus, the protected object can be more reliably protected.

According to the manufacturing method of the present invention, a raw material for a surface protective cover having a width narrower than that of an actual surface protective cover can be obtained very easily without folding and unfolding the base film many times. In addition, since the pressure-sensitive adhesive layer is provided in a state where the tube-shaped base film is folded flat, the equipment for providing the pressure-sensitive adhesive layer can be made compact.
Furthermore, when a cutting means or the like is placed on the base film on which the pressure-sensitive adhesive layer is formed, one pressure-sensitive adhesive layer can be divided into two by the cutting means or the like. Therefore, a surface protective cover provided with two pressure-sensitive adhesive layers can be obtained by forming one pressure-sensitive adhesive layer.

It is the schematic showing the film forming process (a), adhesive layer forming process (b), cutting means etc. forming processes (c) of the manufacturing method of the raw material for surface protection covers of the present invention. It is the schematic perspective view which showed 1st embodiment of the raw material for surface protection covers of this invention. It is the schematic (A) (B) (C) showing a surface protection method. It is the schematic (A) (B) (C) showing a surface protection method. It is the schematic perspective view which showed 2nd embodiment of the raw material for surface protection covers of this invention. It is the schematic perspective view which showed 3rd embodiment of the raw material for surface protection covers of this invention. It is the schematic (A) (B) (C) showing a surface protection method. It is the schematic perspective view which showed 4th embodiment of the original fabric for surface protection covers of this invention.

Hereinafter, the present invention will be described in detail, but the present invention is not limited thereto.
The raw material for a surface protective cover of the present invention comprises a tube-shaped base film folded flat, an adhesive layer formed on one outer surface of the base film, a cutting means, and the like.

<Base film>
Although the raw material of the base film of the present invention is not particularly limited, a thermoplastic resin is preferable in order to obtain a base film by an inflation extrusion method described later, for example, low density polyethylene, high density polyethylene. , Α-olefin homopolymers such as polypropylene and polybutene, copolymers of ethylene and α-olefin, propylene-ethylene copolymers, propylene-ethylene-butene copolymers, ethylene-vinyl acetate copolymers, ethylene- (meta ) Acrylic ester copolymer and the like can be used. Among these, a copolymer of ethylene and α-olefin is preferable in consideration of price, film forming property, strength, and the like. The thermoplastic resin can be blended and used as necessary. In addition, the base film of the present invention may be a single layer film made of the above-described resin, but may be a multilayer film.

  The thickness of the base film can be appropriately determined according to the use of the surface protective cover original. The general thickness is about 10-100μm, but the original material for the surface protection cover protects the concrete surface immediately after placing, the floor surface of the building under construction and the roof floor surface (masking film for curing) When used in the above, it is desirable to provide a thickness of about 50 to 200 μm because a person may walk on the surface protection cover with a foot.

  Moreover, when a tube-shaped base film is stored for a long time in the state folded flat, inner surfaces (surface which becomes an inner side of a tube) may pseudo-bond. When the inner surfaces are pseudo-bonded, it is difficult to unfold the film when the cover original is cut to form a surface protective cover. In order to prevent such a phenomenon, it is preferable to add a lubricant to the resin composition forming the base film. The lubricant may be added to the entire base film, but in order to reduce the amount of the lubricant, the base film may be a multilayer film and added only to the innermost layer (the layer that is the inside of the tube). Moreover, when it adds to outermost layer (layer used as the outer side of a tube), the extending | stretching of the raw material for surface protection covers obtained can be made easy. The addition amount of the lubricant is desirably about 0.03 to 5.0% by weight, particularly about 0.1 to 1.0% by weight in the resin composition forming the inner surface.

<Adhesive layer>
The raw material of the pressure-sensitive adhesive layer used for the surface protective cover raw material of the present invention is not particularly limited, and conventionally known pressure-sensitive adhesives such as hot-melt pressure-sensitive adhesives and acrylic pressure-sensitive adhesives can be used. It is desirable that the pressure-sensitive adhesive layer has such an adhesive force that the cover is not peeled off from the object to be protected during use of the surface protective cover, and can be peeled off without any adhesive residue after use. Such adhesive strength can be achieved by adjusting the type, application amount, and application area of the adhesive. In addition, the thickness of a general adhesive layer is about 5-30 micrometers.
In addition, when the object to be protected is a coating film of a finished paint vehicle, a metal plate just after production, or the like, it is not desirable that the object to be protected and the pressure-sensitive adhesive layer come into contact over a wide area. When the surface protective cover is used for an application in which it is not desired to make contact over a wide area, the width of the pressure-sensitive adhesive layer is desirably a minimum width that can withstand use. Specifically, it is desirable to form a width of about 5 to 40 cm, particularly about 5 to 30 cm on one outer surface of the base film folded flat.

<Cutting means, etc.>
The raw material for a surface protective cover of the present invention is cut in the width direction and further developed in the length direction to form a surface protective cover. The cutting means or the like is for unfolding the cover original fabric folded flat in the length direction (to make it flat) when obtaining the surface protective cover. As the cutting means and the like, the present invention exemplifies cutting means for assisting in cutting the surface protective cover original fabric in the length direction and a cut formed by cutting the surface protective cover original fabric in the length direction. Further, as the above-described cutting means, a so-called perforation in which the base film is partially cut and a so-called half cut in which the base film is cut about ½ in the thickness direction are exemplified.

<Manufacturing method>
The production method of the present invention comprises a step of producing a flat substrate film (hereinafter referred to as a film forming step) and a pressure-sensitive adhesive on one outer surface of the flat tube substrate film. A step of providing a layer (hereinafter referred to as a pressure-sensitive adhesive layer forming step) and a step of forming a cutting means or a cut in the base film (hereinafter referred to as a forming step of the cutting means).
FIG. 1 is a schematic view showing a film forming step (a), a pressure-sensitive adhesive layer forming step (b), a cutting means forming step (c), and the like. Hereinafter, each process will be described in detail with reference to the drawings.

  First, in the film forming step (a), a tubular substrate film folded flat is manufactured. The base film is formed into a tube-like base film by, for example, forming a sheet-like (flat state) film once by, for example, a T-die extrusion method, and sealing both end edges of the film. It can be obtained by forming a film and folding it flat. However, in order to simplify the manufacturing process, it is desirable to use an inflation extrusion molding method. According to the inflation extrusion molding method, a tubular film can be obtained by extruding a thermoplastic resin from an annular die, and further, when the film is passed through a pinching roll P, it can be folded flat. Moreover, when providing a base film with a gusset so that it may mention later, before introducing a tube-shaped base film into the pinching roll P, what is necessary is just to make it follow a triangular plate etc. In addition, what is necessary is just to determine suitably the circumference of a tube-shaped base film according to the magnitude | size of a to-be-protected object, However, The circumference of a tube-shaped base film becomes the width | variety of a surface protection cover.

  Next, the pressure-sensitive adhesive layer is provided on one outer surface of the tubular substrate film folded flat in the pressure-sensitive adhesive layer forming step (b). In the pressure-sensitive adhesive layer forming step (b) shown in FIG. 1, the pressure-sensitive adhesive layer is applied to one outer surface of the tubular base film folded flat by the gravure coater G. Is not limited to a gravure coater, spray coater, reverse coater, bar coater, comma coater, die coater, floating knife coater, kiss roll coater, inverted knife coater, air knife coater, direct roll coater, plaid coater, etc. A known coating method can be used.

The manufacturing method according to the present invention further includes a step (c) of forming cutting means and the like. Specifically, a cutting means such as perforation or half cut or a step of making a cut is provided in the base film. A conventionally known method can be used as a method for providing the cutting means and the like. In the step (c) of forming cutting means and the like in FIG. 1, a cut is provided in the upper film of the tube-shaped substrate film by the cutter C. In addition, a cutting | disconnection cutting means etc. are formed in the same surface as the outer surface in which the adhesive layer mentioned above was formed among the two outer surfaces of the base film divided by folding flatly. In the manufacturing method shown in FIG. 1, the upper and lower sides of the tubular base film are inverted between the pressure-sensitive adhesive layer forming step (b) and the cutting means etc. forming step (c). That is, the surface (lower surface) coated with the adhesive in the pressure-sensitive adhesive layer forming step (b) is the surface (upper surface) on which cutting means and the like are provided in the cutting means and the like forming step (c).
In addition, although the said cutting means etc. formation process (c) can also be performed before an adhesive layer formation process (b), it is desirable to carry out after an adhesive formation process (b). If an adhesive layer is provided after forming a perforation or a cut in the base film, the adhesive layer may wrap around the inner surface of the base film from the perforation or the cut.

<Raw material for surface protection cover (first embodiment)>
FIG. 2 is a schematic perspective view showing a first embodiment of the surface protective cover original fabric of the present invention. The base film 21 has a tube shape that is folded flat, and of the two outer surfaces 21A and 21B of the base film 21 that are divided by being folded flat, the adhesive layer 22 and the cut line are formed on one outer surface 21A. 23 is formed. In the embodiment, the cut 23 is formed on the base film 21 provided with the pressure-sensitive adhesive layer 22, and divides the width of the pressure-sensitive adhesive layer 22 into two equal parts. When the surface protective cover original fabric 20 is used, a surface protective cover having an equal width adhesive layer formed at both ends in the width direction can be obtained.

FIG. 3 shows an example of a method for protecting the object to be protected 24 using the surface protective cover original fabric shown in FIG.
First, the outer surface (the other outer surface) 21B of the surface protective cover original fabric 20 on which the adhesive layer, the cutting means, etc. are not formed is applied to the edge of the object 24 to be protected, 20 is fed out (FIG. 3A). When the surface protective cover original fabric 20 is fed out to the edge of the object to be protected, the surface protective cover original fabric is cut in the width direction (FIG. 3B). Finally, the cut surface protective cover original 20 ′ is opened from the cut 23, the protected object 24 is covered with the surface protective cover 25, and the adhesive layer 22 is adhered to the protected object 24 (FIG. 3C). ) The surface protection of the protected object 24 is completed. According to the surface protection method, the stretching operation can be performed while the base film 20 is in a tube shape, so that the operation is very simple.

  When the surface protective cover original fabric 20 is unrolled while the other outer surface 21B of the base film 21 is applied to the protected object 24 (FIG. 3A), the surface protective cover original fabric 20 is protected. For the purpose of preventing slippage from 24, the other outer surface 21B of the base film 21 can be subjected to anti-slip processing. In the present invention, examples of the anti-slip process include (1) embossing the other outer surface 21B, (2) providing an adhesive layer, and (3) bonding a non-slip web such as a nonwoven fabric. .

  FIG. 4 is an example of a method of covering (protecting) all surfaces except the bottom surface of the object 24 to be protected using the surface protective cover original fabric shown in FIG. First, the front end of the surface protective cover original fabric 20 is aligned with the lower part of the side surface of the object 24 to be protected, and then the side surface and top surface of the object to be protected are covered while the cover original fabric 20 is fed (FIG. 4A). At the stage where the surface protection cover 20 is extended to the side facing the side covered with the surface protection cover original fabric first, the surface protection cover original fabric 20 is cut in the width direction (FIG. 4B). Finally, the cut surface protective cover original fabric 20 'is opened from the cut 23, and the pressure-sensitive adhesive layer 22 is adhered to the object to be protected 24 (FIG. 4C), thereby completing the surface protection of the article.

<Original fabric for surface protective cover (second embodiment)>
FIG. 5 shows a surface protective cover original fabric 50 according to the second embodiment. The surface protective cover original fabric 50 has gussets formed on the side surfaces 51C and 51D. When the base film 51 is a tube-like film that is folded flat and further formed with a gusset, the width of the surface protective cover original fabric 50 is very narrow (1/3 to 1/4 of the surface protective cover). To the extent of width). If the width of the surface protective cover original fabric 50 is narrow, one person can easily carry or spread the surface protective cover.
5 has a cutting means (perforation) 56 also in the width direction of the film. When the length of the object to be protected is determined in advance, the cutting means 56 in the width direction can be provided in advance according to the length. The raw material for the surface protective cover having cutting means in the width direction does not need to use a blade such as a ridge or a cutter when obtaining the surface protective cover.

<Original fabric for surface protective cover (third embodiment)>
FIG. 6 is a schematic perspective view of the surface protective cover original fabric 60 in which the cut 63 is located away from the adhesive layer 62.
When the object to be protected exists in a vertical direction like a wall surface, the object to be protected can be covered even with a surface protective cover having an adhesive layer only on one edge. The surface protective cover original fabric 60 shown in FIG. 6 is located at a position where the cut 63 is removed from the adhesive layer 62, and the adhesive layer 62 is not divided by the cut 63. Therefore, when the original fabric 60 is cut in the width direction, a surface protective cover including the pressure-sensitive adhesive layer 62 only on one edge can be obtained.

  6 includes a pressure-sensitive adhesive layer 62 and a cut 63 at a position close to the end edge 61α of the base film 61 folded flat. The cut 63 is located closer to the edge 61α than the adhesive layer 62 is. The surface protective cover original fabric 60 provided with the adhesive layer 62 and the cut 63 at such a position is attached to the edge of the object to be protected (for example, the wall surface), as will be described later. You can pay out.

FIG. 7 shows an example of a method of protecting the wall surface W using the surface protective cover original fabric shown in FIG.
First, the outer surface of the surface protective cover original fabric 60 on which the adhesive layer or the cut is formed is applied to the wall surface W, and the surface protective cover original fabric is fed out while adhering the adhesive layer to the upper end of the wall surface W ( FIG. 7 (A)). When the surface protective cover original fabric is fed out to the edge of the wall surface to be protected, the surface protective cover original fabric is cut in the width direction (FIG. 7B). Finally, the tubular base film is cut open from the cut, and the wall surface is covered with the surface protective cover 65 (FIG. 7C). According to the surface protection method, the wall surface can be protected very easily.

<Fabric for surface protection cover (fourth embodiment)>
FIG. 8 is a schematic perspective view showing another embodiment of the surface protective cover original fabric 80 in which the cut 83 is located away from the adhesive layer 82. As shown in FIG. 8, the pressure-sensitive adhesive layer 82 may be two pressure-sensitive adhesive layers 82 </ b> A and 82 </ b> B that are continuous in the length direction. If the pressure-sensitive adhesive layer is biased toward one end side of the tubular substrate film, it is difficult to wind the surface protective cover original in a roll shape.

Since the raw material for a surface protective cover of the present invention can be made to have a desired size, it can also be used as a surface protective cover for covering non-painted parts when various buildings, automobiles, and other articles are painted. It can also be used for a so-called “curing sheet” that prevents the floor and wall surfaces from being damaged during construction of a house.
Furthermore, the raw material for a surface protective cover of the present invention can be cut into a desired size and used as a cover for a tray or the like. In order to prevent dust from adhering to the components and the like housed in the tray, the opening of the tray is often covered with paper or the like. The paper or the like is fixed to the tray with an adhesive tape, but if the surface protective cover original fabric of the present invention is used, it can be easily fixed to the tray without using an adhesive tape or the like.

20, 50, 60, 80 Surface protective cover original fabric 20 ', 60' Surface protective cover original fabric cut in the width direction 21, 51, 61, 81 Base film 21A, 51A, 61A One outer surface 21B, 51B, 61B The other outer surface 51C, 51D Side surface 51α End edge 22, 52, 62, 82 Adhesive layer 23, 53, 63, 83 Cut 24 Protected object 25, 65 Surface protective cover 56 Cutting means (width direction)
P Pinch roll G Gravure coater C Cutter W Wall surface

Claims (4)

In the raw material for the surface protection cover consisting of the base film and the pressure-sensitive adhesive layer,
The base film is in the shape of a tube folded flat,
On one outer surface of the two outer surfaces of the base film that is divided by being folded flat, an adhesive layer and a cutting means or a cut extending in the length direction of the surface protective cover original fabric are provided. An original fabric for a surface protective cover, which is provided. 2. The raw material for a surface protective cover according to claim 1, wherein the cutting means or the cut is provided on a base film on which the pressure-sensitive adhesive layer is formed. It is a manufacturing method of the original fabric for surface protection covers according to claim 1 or 2,
Producing a tube-shaped base film folded flat;
Providing a pressure-sensitive adhesive layer on one outer surface of a tubular substrate film folded flat;
And a step of making a cutting means or a cut in the base film. 4. The method for producing an original fabric for a surface protective cover according to claim 3, wherein the cutting means or the cut is put on a base film on which the pressure-sensitive adhesive layer is formed.

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