KR101049395B1 - Attachment Method of Adhesive Film and Adhesive Film Winding Reel - Google Patents

Abstract

An object of the present invention is to provide a method for attaching an adhesive film which can prevent the adhesive from sticking out when the long adhesive film wound on the reel is taken out and attached, and can also prevent spaces and winding shifts between the winding layers. . The present invention is a method of attaching an adhesive film which pulls out the adhesive film 2 wound on the reel 3 and attaches the adhesive object 20 to the attachment object 20, wherein the cushion portion 16 is attached to the winding portion 15 of the reel 3. It is formed. As the cushion portion 16, one constructed using a material having a foaming ratio of 5 to 40 times is used. Moreover, as cushion part 16, the thing of thickness 0.5mm-3mm can also be used. As the adhesive film 2, it is suitable for the anisotropic conductive adhesive film whose viscoelasticity is 6 * 10 <^4> Pa * s or less.

Description

Adhesion method of an adhesive film and an adhesive film winding reel {STICKING METHOD OF ADHESIVE FILM AND WINDING REEL OF ADHESIVE FILM}

TECHNICAL FIELD This invention relates to the technique which winds a series of long elongate films, such as an anisotropically conductive adhesive film, in a manufacturing process of an electronic device, and draws out to a reel, for example.

Generally, when electrically connecting electronic components, such as a liquid crystal panel and an IC chip, for example, an anisotropically conductive adhesive film is used.

Such an adhesive film is formed on a narrow and long peeling sheet, and is shipped in the form wound up to the reel member in roll shape.

By the way, in recent years, although it is required to make an adhesive film longer, since the stress which generate | occur | produces in an adhesive film increases as the diameter of a roll shape increases, there exists a possibility that the adhesive agent in an adhesive film may stick out.

In particular, when the reel was attached to the take-up shaft, when the adhesive film was taken out, an adhesive sticked out at the core portion of the reel.

Moreover, when taking out such a long film, there also exists a problem that the space | interval (gapping) or winding-off (off-core) between winding layers arises because a film slips.

For such a problem, the following various proposals have been proposed, but further improvement is required.

Patent Document 1: Japanese Utility Model Application Laid-open No. Hei 2-142770

Patent Document 2: Japanese Patent Application Laid-Open No. 8-310735

Patent Document 3: Japanese Unexamined Patent Publication No. 2001-39631

Patent Document 4: Japanese Unexamined Patent Publication No. 2006-44838

Patent Document 5: Japanese Unexamined Patent Publication No. 2004-43148

DISCLOSURE OF INVENTION

Problems to be Solved by the Invention

This invention is made | formed in view of such a subject of the prior art, The objective is that the adhesive agent does not stick out when drawing out and attaching the long adhesive film wound on the reel, and the space | interval between winding layers, and winding-up It is providing the sticking method of the adhesive film which can also prevent a shift | offset | difference.

Means to solve the problem

In order to achieve the above object, the present inventors have made diligent efforts to form a cushioning part having a specific elasticity in the core portion wound around the adhesive film, and to adjust the winding length and viscoelasticity of the adhesive film and the tension at the time of taking out the film. By doing this, it discovered that the adhesive agent does not stick out at the time of film extraction, and that winding quality can also be improved and came to complete this invention.

The present invention made on the basis of this knowledge is a method of attaching an adhesive film which draws out an adhesive film wound on a reel and attaches it to an object to be attached, wherein a cushion portion is formed at the core portion of the reel, and the foaming ratio is five times as the cushion portion. The thing comprised using the material which is -40 times is used.

In the present invention, a thickness of 0.1 mm to 10 mm, more preferably 0.5 mm to 3 mm may be used as the cushion part.

In this invention, a thing whose viscoelasticity is 6 * 10 <^4> Pa * s or less can also be used as said adhesive film.

In this invention, a winding length is 100 m or less, More preferably, it is 50 m or less as said adhesive film.

In the present invention, the adhesive film may be taken out at a tension of 100 g or less, more preferably 50 g or less.

In this invention, the said adhesive film can also be made into the anisotropic conductive adhesive film which electroconductive particle disperse | distributed in insulating adhesive resin. In addition, the dispersion amount of electroconductive particle is very small compared with the whole amount, and does not affect the various conditions in this invention.

On the other hand, the present invention is an adhesive film winding reel in which an anisotropic conductive adhesive film is wound on a reel, wherein a cushion portion is formed in the core portion of the reel, and the cushion portion is constituted using a material having a foam ratio of 5 to 40 times. The cushion portion has a thickness of 0.1 mm to 10 mm, and the viscoelasticity of the anisotropic conductive adhesive film is 6 × 10 ⁴ Pa · s or less.

Effects of the Invention

According to this invention, when taking out the long adhesive film wound on the reel, an adhesive agent does not stick out and the space | interval and winding shift between winding layers can also be prevented.

Fig.1 (a) is explanatory drawing which shows embodiment of the adhesive film sticking apparatus for implementing this invention, and the method of this invention (in the case of the adhesive film of a three-layer structure).

FIG.1 (b) is explanatory drawing which shows embodiment of the adhesion film adhesion | attachment apparatus for implementing this invention, and the method of this invention (in the case of the adhesive film of a two-layer structure).

It is a perspective view which shows the measuring jig used for the protruding test method of the adhesive agent in this invention.

It is a front view which shows the measuring jig used for the test method of the adhesive agent in this invention.

Description of the Related Art

1A, 1B: Adhesive Film Attaching Device

2: adhesive film

2A: Anisotropic Conductive Adhesive Film

3: reel

10: Attachment part

15: core

16: cushion portion

20: attachment object

Best Mode for Carrying Out the Invention

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described in detail with reference to drawings.

FIG.1 (a) and (b) are explanatory drawing which shows embodiment of the adhesive film attachment apparatus and this invention method for implementing this invention.

As shown to (a) and (b) of FIG. 1, this adhesive film attachment apparatus 1A, 1B has the reel 3 which wound the adhesive film 2 on the winding shaft (not shown) comprised so that rotation drive was carried out. It is attached and the adhesive film 2 is taken out from this reel 3.

In the case of this invention, as the adhesive film 2, the anisotropically conductive adhesive film which electroconductive particle disperse | distributed in insulating adhesive resin can be used especially preferably.

However, it is applicable also to the insulating adhesive film which does not contain electroconductive particle in insulating adhesive resin.

This invention is especially preferable as a viscoelasticity 6 * 10 <^4> Pa * s as an adhesive film (2). In addition, although the viscoelastic value of the adhesive film 2 hardly changes at the temperature of about 20-40 degreeC, in this invention, the viscoelastic value in 30 degreeC is used.

In this state, it is in the state before resin hardened.

In addition, of course, this invention can be applied also when the viscoelasticity of the adhesive film 2 is larger than 6x10 <^4> Pa * s.

Specifically, the adhesive film 2 has a width of 0.5 to 15 mm and a thickness of 0.01 to 0.15 mm. The adhesive film 2 is generally formed on a peeling sheet (not shown) which consists of resins, such as PET. As for this peeling sheet, the thing of width 0.5-15 mm and thickness 0.01-0.15 mm is used.

In addition, this invention is applicable also to what provided the protective film on the resin surface of the adhesive film (2).

This protective film consists of resin, such as PET, and the thing of width 0.5-15 mm and thickness 0.01-0.15 mm is used specifically ,.

As shown to Fig.1 (a) and (b), the adhesive film 2 drawn out from the reel 3 is pulled and wound through the some rollers 4 and 5, for example of FIG. As shown to (a), in the case of a three-layered structure, after the protective film 2a is peeled off with the peeling roller 6, it is guided via the attachment part 10 in the peeling sheet 2b attachment state.

On the other hand, for example, as shown to Fig.1 (b), in the case of a two-layered structure, the adhesive film 2 with the peeling sheet 2b drawn out from the reel 3 has several rollers 4 and 5 After being pulled up and wound through, it is guided via the attachment part 10.

The attachment part 10 has the support stand 11 for mounting attachment objects 20, such as a wiring board, and supports the adhesive film 2 with the press head 12 from the upper side of the attachment object 20 ( It is comprised so that it may adhere to the attachment object 20 by pressing to 11).

On the other hand, in this embodiment, the elastic cushion part 16 is closely attached and formed around the core part 15 of the reel 3.

This cushion part 16 is formed in the ring shape, for example of predetermined thickness, and the adhesive film 2 is wound on this cushion part 16. As shown in FIG.

Although it does not specifically limit as the cushion part 16 in the case of this invention, It is preferable to use the resin material which has foamability from a viewpoint of further improving the sticking-out and winding quality of an adhesive agent.

In this case, it is preferable to use the foaming ratio (the ratio of the bubbles contained in the material) of the cushion portion 16 5 to 40 times, and the more preferable foaming ratio is 15 to 40 times.

Moreover, although it does not specifically limit as thickness of the cushion part 16, It is preferable to set it as 0.1 mm-10 mm from a viewpoint of improving the prevention of the sticking out of an adhesive agent, and winding quality further, More preferable thickness is 0.5 mm-3 Mm.

Moreover, as a material of the cushion part 16, urethane resin etc. can be used preferably, for example.

Moreover, the thing of the diameter of the core part 15 of the reel 3 is 30-150 mm specifically, is used.

In such a configuration, in the present invention, the tensile film is applied to the adhesive film 2 in the same manner as in the prior art, and the adhesive film 2 is taken out from the reel 3.

In this case, although it does not specifically limit in this invention, It is preferable to pull out the adhesive film 2 by 50 g or less of tension from a viewpoint of further preventing the sticking out of an adhesive agent, and improving winding quality.

Moreover, although the winding length of the adhesive film 2 in the reel 3 is not specifically limited, It is preferable to set it as 50 m or less from a viewpoint of preventing the sticking out of an adhesive agent, and improving winding quality further.

Example

Hereinafter, although an Example and a comparative example are given and this invention is demonstrated concretely, this invention is not limited to a following example.

In this example, what coated and formed the anisotropically conductive adhesive agent of thickness 0.018mm in the film form on the release sheet of width 2mm as an anisotropically conductive adhesive film was used.

The viscoelasticity of this anisotropically conductive adhesive film is 6 * 10 <^4> Pa * s on the conditions of measuring needle PP20 in the temperature environment of 30 degreeC.

<Glue sticking out test>

It is a perspective view which shows the measuring jig used for the sticking-out test method of the adhesive agent in this invention.

Here, the reel in which the cushion part was formed and the reel which did not form the cushion part are prepared, and as shown in FIG. 2, the said anisotropic conductive adhesive film 2A is wound around each reel 3 predetermined times, and it fixed to a perpendicular direction, The weight 31 of predetermined weight was hung on the anisotropically conductive adhesive film 2A drawn out from each reel 3 perpendicularly | vertically, and the predetermined load was applied, and the squeeze state of the adhesive agent after 48 hours passed was visually observed.

This test was an ability value, and it implemented in the clean room of the temperature of 23 +/- 3 degreeC, and the humidity of 55 +/- 10%.

In this case, as a cushion part of a reel, the thing of 30 times of foaming magnification was used, and thickness was set to 3 mm.

In addition, the core diameter of a reel is 55 mm.

The result of this adhesive sticking-out test is shown in Table 1 and Table 2.

Table 1 shows the relationship between the winding length (m) and the pull-out tension (g) of the anisotropic conductive adhesive film in the reel in which the cushion part is formed, and Table 2 shows the anisotropic conductive adhesion in the reel in which the cushion part is not formed. The relationship between the film winding length m and the drawing tension g is shown.

Here, ○ indicates that no squeeze of the adhesive is observed, Δ indicates that squeeze of the adhesive is partially observed, but is actually usable, and × indicates that practical use is difficult due to squeezing of the adhesive.

As is clear from Table 1 and Table 2, it is understood that the sticking out of the adhesive is greatly reduced by forming the cushion portion in the reel.

In particular, in the case of a reel having a winding length of 50 m and a pull-out tension of 50 g, the anisotropic conductive adhesive film was prevented from sticking out of the adhesive by forming a cushion portion on the reel.

This is among the ones currently used that the load on an anisotropically conductive adhesive film belongs to an upper limit. Therefore, in the case of the reel whose winding length was less than 50m and the tension | pulling at the time of taking out is less than 50g, the sticking out of the adhesive agent did not occur at all.

<Winding quality test>

It is a front view which shows the measuring jig used for the test method of the adhesive agent in this invention.

Here, the reel in which the cushion part was formed and the reel which did not form the cushion part are prepared, and as shown in FIG. 3, the anisotropic electroconductive adhesive drawn out from each reel 3 which wound the above-mentioned anisotropic conductive adhesive film 2A for predetermined length. Predetermined load was applied to the film 2A using the push-pull gauge 40, and it was visually observed whether the space between the winding layers or the winding shift occurred in the anisotropic conductive adhesive film 2A. .

<Evaluation>

The winding length of the anisotropic conductive adhesive film was changed to 50 to 40 times using a reel having a winding length of 50 m, the thickness of the cushion was changed to 0.5 to 3 mm, and the tension at the time of extraction was 50 g. Under the conditions, the adhesive was subjected to a squeeze test and a winding quality test. The results are shown in Table 3.

In addition, in evaluation of the winding quality in a table | surface, (circle) shows that the space | interval and winding shift | offset | difference between winding layers were not observed in the film, and (triangle | delta) shows the space and winding shift | offset | difference between the winding layers of a film are observed, but are actually usable. , × indicates that actual use is difficult due to the space between the winding layers of the film and the winding shift.

In addition, about comprehensive determination, (circle) is the thing which adhesive goodness and winding quality are good, (triangle | delta) is the thing which can be actually used although some adhesive agent sticking out and winding quality is observed, and x is actual use by adhesive sticking out and poor winding quality. This is difficult.

As apparent from Table 3, when the foaming ratio of the reel cushion portion is 5 times, the thickness of the cushion portion is set to 3 mm, and when the copper foaming ratio is 15 times, the thickness of the cushion portion is set to 1 to 3 mm, the copper foaming ratio is 30. In the case of double, the thickness of a cushion part was made into 0.5-3 mm, and in the case of 40 times the same foaming magnification, the thickness of a cushion part was made into 0.5-1 mm, and the anisotropic conductive adhesive film which can be actually used could be taken out.

Moreover, using the thing of viscoelasticity 1x10 <^5> Pa * s as an anisotropically conductive adhesive film and having performed the said adhesive sticking out test and winding quality test, the problem did not arise in all the items.

Claims (10)

As a method of attaching an adhesive film which draws out an adhesive film wound on a reel and attaches it to an object to be attached, A cushion part is formed in the core part of the reel, The adhesion method of the adhesive film using what was comprised using the material whose foaming ratio is 5 times-40 times as said cushion part. The method of claim 1, The adhesion method of the adhesive film using the thing of thickness 0.1mm-10mm as said cushion part. The method of claim 1, The adhesion method of the adhesive film using the thing of thickness 0.5mm-3mm as said cushion part. The method of claim 1, The adhesion method of the adhesive film using what is viscoelasticity is 6 * 10 <^4> Pa * s or less as said adhesive film. The method of claim 1, The adhesion method of the adhesive film using the thing of winding length 300 m or less as said adhesive film. The method of claim 1, The adhesion method of the adhesive film using the thing whose winding length is 50 m or less as said adhesive film. The method of claim 1, The adhesion method of the adhesive film which takes out the said adhesive film by the tension of 100 g or less. The method of claim 1, The adhesion method of the adhesive film which draws out the said adhesive film by the tension of 50g or less. The method of claim 1, The said adhesive film is a sticking method of the adhesive film which is an anisotropically conductive adhesive film which electroconductive particle disperse | distributed in insulating adhesive resin. As an adhesive film winding reel in which an anisotropic conductive adhesive film is wound on a reel, A cushion portion is formed in the core portion of the reel, the cushion portion is made of a material having a foam ratio of 5 to 40 times, and the thickness of the cushion portion is 0.1 mm to 10 mm, The adhesive film winding reel whose viscoelasticity of the said anisotropic conductive adhesive film is 6 * 10 <^4> Pa * s or less.

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