KR102092530B1 - Film recommended body and method for manufacturing film recommended body - Google Patents

Abstract

Provided is a film recommendation body capable of obtaining excellent tackiness, and a method for manufacturing the film recommendation body. The film recommended body is an adhesive film having a first surface (concave surface) having a thickness at both ends in a width direction greater than the thickness of the central portion along a longitudinal direction, and a flat second surface (flat surface) formed on the opposite side of the first surface. (2) A peeling film (3) having a medium peeling surface having a relatively high peeling force, a light peeling surface having a relatively low peeling force, and a reel (4) recommending an adhesive film and a peeling film for winding, It is made by recommending that the 1st surface of the adhesive film 2 and the medium peeling surface of the peeling film 3 contact, and the 2nd surface of the adhesive film 2 and the light peeling surface of the peeling film 3 contact.

Description

Film recommended body and method for manufacturing film recommended body

The present invention relates to a film recommended body in which an adhesive film such as ACF (Anisotropic Conductive Film), NCF (Non Conductive Film) is wound, and a method for manufacturing the film recommended body. This application claims priority based on Japanese Patent Application No. 2015-228229 filed on November 20, 2015 in Japan, and this application is incorporated by reference into this application.

Conventionally, adhesive films such as ACF and NCF are obtained through a slit process of cutting (slit) a wide adhesive film into a narrow width of 1 to 3 mm, for example. In the adhesive film after the slit step, one surface rises along the slit direction, and the other surface becomes flat (for example, see Patent Document 1).

That is, the adhesive film after the slit process has one surface (concave surface) in which the thickness of both ends in the width direction along the length direction is greater than the thickness of the central portion, and the other surface (flat surface) that is flat.

When the film recommended body in which such an adhesive film is wound is used, usually, the flat surface of the adhesive film and the release film are drawn out in an adhesive state. For this reason, the concave surface of the adhesive film is affixed to the adherend such as the substrate, and it is difficult to obtain excellent temporary adhesion.

Japanese Patent Application Publication No. 2012-102278

The present invention solves the problems in the above-described prior art, and provides a film recommendation body capable of obtaining excellent temporary tackiness, and a method for manufacturing the film recommendation body.

In order to solve the above-described problem, the method for manufacturing a film recommendation body according to the present invention includes a first surface formed with a thickness of both ends in a width direction greater than a thickness of a central portion along a length direction, and an opposite side of the first surface. An adhesive film having a flat second surface formed, a peeling film having a medium peeling surface having a relatively high peeling force, and a light peeling surface having a relatively low peeling force, and a winding core recommending the adhesive film and the peeling film, It characterized in that it is made by recommending to the core so that the first peeling surface of the adhesive film is in contact with the first peeling surface of the adhesive film, and the light peeling surface of the peeling film is in contact with the second peeling film.

In addition, the method of manufacturing a film recommendation body according to the present invention has a first surface having a thickness at both ends in a width direction greater than the thickness of a central portion along a longitudinal direction, and a flat second surface formed on the opposite side of the first surface. The adhesive film and the peeling film having a medium peeling surface having a relatively high peeling force and a light peeling surface having a relatively low peeling force, while the first peeling surface of the adhesive film and the peeling film have a medium peeling surface, the adhesive film It characterized in that it is recommended to the winding core so that the light peeling surface of the release film and the second surface of the.

In addition, in the method of manufacturing a connection structure according to the present invention, an adhesive having a first surface having a thickness at both ends in a width direction greater than the thickness of a central portion along a longitudinal direction and a flat second surface formed on the opposite side of the first surface A peeling film having a film, a medium peeling surface having a relatively high peeling force, and a light peeling surface having a relatively low peeling force, and a winding core for recommending the adhesive film and the peeling film, and the first surface of the adhesive film A laminated film in which the first peeling film is in contact with the first peeling film and the peeling film from the peeling film from the film recommended body where the peeling film is in contact with the second peeling film and the peeling film. Withdraw, and temporarily attach the second surface of the adhesive film to the first circuit member, peel the peeling film, place the second circuit member on the adhesive film, and press And that is characterized.

According to the present invention, the flat surface of the adhesive film is affixed to an adherend such as a substrate while the concave surface of the adhesive film and the release film are adhered, and thus excellent tackiness can be obtained.

1 is a perspective view schematically showing an example of a film recommended body.
2 is a cross-sectional view schematically showing an adhesive film.
3 is a cross-sectional view schematically showing an adhesive film taken out from a film recommended body.
4 is a cross-sectional view schematically showing the outermost circumferential side of the film recommended body of the first structural example in the AA cross section of the film recommended body shown in FIG. 1.
5 is a cross-sectional view schematically showing the outermost circumferential side of the film recommendation body shown in FIG. 1 at the time of drawing out the film recommendation body of the first structural example.
6 is a cross-sectional view schematically showing the outermost circumferential side of the film recommendation body shown in FIG. 1 at the time of drawing the film recommendation body of the second configuration example.
7 is a cross-sectional view schematically showing a state where the adhesive film is projected out and attached to the flange in the AA cross section of the film recommended body shown in FIG. 1.
8 is a partial cross-sectional view schematically showing a wide adhesive film (fabric).
9 is a cross-sectional view schematically showing the adhesive film of the slit process.

Hereinafter, embodiments of the present invention will be described in detail in the following order.

1. Film recommended body

2. Manufacturing method of film recommended body

3. Manufacturing method of connection structure

4. Examples

<1. Film recommended body ＞

The film recommendation body according to this embodiment includes a first surface (concave surface) having a thickness of both ends in a width direction greater than the thickness of the central portion along a longitudinal direction, and a flat second surface (flat surface) formed on the opposite side of the first surface. ), An adhesive film having a relatively high peeling force, a peeling film having a light peeling surface having a relatively low peeling force, and a reel member recommending the adhesive film and the peeling film to the core, and It is made by recommending that the first surface and the medium peeling surface of the release film come into contact with the second surface of the adhesive film and the light peeling surface of the release film. As a result, the flat surface of the adhesive film is affixed to the adherend such as a substrate while the concave surface of the adhesive film and the support film are adhered, and thus excellent tackiness can be obtained.

1 is a perspective view schematically showing an example of a film recommended body according to the present embodiment. As shown in FIG. 1, the film recommended body 1 is formed by winding the adhesive film 2 and the release film 3 on the reel 4.

2 is a cross-sectional view schematically showing the adhesive film, and FIG. 3 is a cross-sectional view schematically showing the adhesive film when taken out from the film recommended body.

The adhesive film 2 has a first surface (concave surface) in which the thickness of both ends in the width direction along the longitudinal direction is larger than the thickness of the central portion, and a flat second surface (flat surface) formed on the opposite side of the first surface. . As shown in Fig. 2, the cross section in the width direction of the adhesive film 2 is concave, and convex portions 2a continuous along the longitudinal direction are formed at both ends in the width direction of the concave surface, and In the central portion in the width direction, concave portions 2b that are continuous along the longitudinal direction are formed. The total contact width Sa (Sa1 + Sa2) of the convex portions 2a at both ends in the width direction of the concave surface is, for example, 10 to 60% of the contact width Sb in the width direction of the flat surface. Moreover, the contact width Sb in the width direction of the flat surface is, for example, 0.6 mm to 5.0 mm. Moreover, the height h of the convex portion 2a and the concave portion 2b is, for example, 5 µm or more, and the lower limit thereof is 70% or less of the film thickness. Moreover, the length of an adhesive film is 50 m-5000 m, for example.

Examples of the adhesive film 2 include an anisotropic conductive film (ACF: Anisortropic Conductive Film), an adhesive film (NCF: Non Conductive Film), and a conductive adhesive film that connects an electrode and a tab wire of a solar cell. .

The release film 3 is a support film that is molded into a tape and supports the adhesive film. As a base material used for the release film 3, PET (Poly Ethylene Terephthalate), OPP (Oriented Polypropylene), PMP (Poly-4-methlpentene-1), PTFE (Polytetrafluoroethylene) etc. are mentioned, for example.

The release film 3 has a medium peeling surface having a relatively high peeling force and a light peeling surface having a relatively low peeling force. Here, the medium peeling surface having a relatively high peeling force means a surface having a high peeling force when the peeling force of both surfaces of the peeling film 3 is measured under the same conditions, and a light peeling surface having a relatively low peeling force is peeling. When the peeling force of both surfaces of the film 3 is measured under the same conditions, it means the surface having the lower peeling force. The peeling force of the medium peeling surface and the light peeling surface can be adjusted by, for example, the type of the peeling agent such as silicone, the surface roughness (Rz) of the substrate, and the like. Moreover, 180 degree peeling strength test (JIS K 6854-2), 90 degree peeling strength test (JIS K 6854-1) etc. are mentioned as a measuring method of peeling force.

In this embodiment, the value of the peeling force of the medium peeling surface multiplied by the width of the contact width in the width direction between the concave surface and the medium peeling surface is greater than the value of the peeling force of the light peeling surface multiplied by the contact width in the width direction between the flat surface and the light peeling surface. Big. Specifically, from the value obtained by multiplying the 180 ° peeling force (Ta) of the medium peeling surface by the contact width (Sa) in the width direction between the concave surface and the heavy peeling surface, the 180 ° peeling force (Tb) of the light peeling surface is flat and the light peeling surface The difference value [(Ta × Sa)-(Tb × Sb)] minus the value multiplied by the contact width (Sb) in the width direction therebetween is preferably 0.3 mN or more and 4.5 mN or less, more preferably 0.5 mN or more It is 3.0 mN or less, and more preferably 1.0 mN or more and 2.5 mN or less. As a result, the flat surface of the adhesive film is affixed to the adherend such as a substrate while the concave surface of the adhesive film and the support film are adhered, and thus excellent tackiness can be obtained.

The reel 4 includes a normal winding core 5 for winding the adhesive film 2 and a release film 3, and plate-shaped flanges 6 formed at both ends of the winding core 5, respectively. . The winding core 5 has an axial hole through which a rotating shaft for rotating the reel 4 is inserted. One end of the adhesive film 2 or the release film 3 in the longitudinal direction is connected to the winding core 5, and the adhesive film 2 and the release film 3 are wound.

The winding core 5 and the flange 6 can be formed using various plastic materials, for example. The flange 6 may be subjected to an electrostatic treatment on the surface in contact with the adhesive film 2. As a method of performing electrostatic treatment, for example, a method of applying a compound such as polythiophene to the flange 6 and the like. In addition, although the film recommendation body shown in FIG. 1 was set as the structure which recommended the adhesive film to the winding core 5 which has the flange 6 at both ends, it may be a structure which recommends the adhesive film to the winding core without a flange.

[First configuration example]

4 is a cross-sectional view schematically showing the outermost circumferential side of the film recommended body of the first structural example in the A-A cross section of the film recommended body shown in FIG. 1. As shown in FIG. 4, the release film 3 has a flat surface of the adhesive film 2 while the concave surface and the medium peeling surface of the adhesive film 2 contact in a predetermined contact width Sa in the width direction. And the light peeling surface are in contact with the predetermined contact width Sb.

The film recommended body of this first structural example is configured by recommending the laminated film in which the flat surface of the adhesive film 2 and the light peeling surface of the release film 3 contact the adhesive film 2 side to be the inner peripheral side.

5 is a cross-sectional view schematically showing the outermost circumferential side of the film recommendation body shown in FIG. 1 at the time of drawing out the film recommendation body of the first structural example. As shown in FIG. 5, the outermost circumferential release film 3 is peeled off for one circumference, and at the time of drawing out, the adhesive film 2 is drawn out in contact with the release film 3 on the inner circumference side.

[Second configuration example]

FIG. 6 is a cross-sectional view schematically showing the outermost circumferential side of the film recommendation body shown in FIG. 1 at the time of drawing the film recommendation body of the second configuration example. The film recommendation body of this 2nd structural example is comprised by recommending the laminated film which the flat surface of the adhesive film 2 and the light peeling surface of the peeling film 3 contact so that the adhesive film 2 side may become the outer peripheral side. As shown in FIG. 6, the outermost circumferential adhesive film 2 is peeled off by one circumference, and at the time of drawing out, the adhesive film 2 is drawn out in contact with the outer peripheral side peeling film 3.

[About blocking resistance]

Fig. 7 is a cross-sectional view schematically showing a state where the adhesive film comes out and adheres to the flange in the A-A cross section of the film recommended body shown in Fig. 1. In the film recommended body, the adhesive film 2 may be tightly wound due to temperature expansion and contraction or the like. As a result, the resin (adhesive component) of the adhesive film 2 may flow outward from one end in the width direction along the longitudinal direction of the resin, and may come out from the side surface of the release film 3. As shown in Fig. 7, when the resin of the adhesive film 2 comes out from the side of the release film 3, the resin of the adhesive film adheres to the side of the flange 6 of the reel, and the adhesive film is withdrawn normally. Blocking may occur that cannot be performed.

The film recommendation body according to this embodiment includes a first surface (concave surface) having a thickness of both ends in a width direction greater than the thickness of the central portion along a longitudinal direction, and a flat second surface (flat surface) formed on the opposite side of the first surface. ) Is recommended. For this reason, as shown in FIGS. 2 and 3, between the concave surface of the adhesive film 2 and the release film 3, the concave portion 2b is continuously formed along the longitudinal direction. In this way, a gap formed by the concave portion 2b is formed between the concave surface of the adhesive film 2 and the release film 3, so as to relieve the tight winding force when wound tightly, The resin of the adhesive film 2 can be made to flow into the void by the recessed part 2b. For this reason, the protruding of the resin can be suppressed, and excellent blocking resistance can be obtained.

Moreover, according to the film recommendation body of a 1st structural example, since an adhesive film exists in the direction which pulls out a film, peeling film 3 can be drawn out as if lifting the adhesive film 2. For this reason, even if the resin adheres to the flange 6, it can be peeled off with a force strong enough to eliminate the blocking, and excellent blocking resistance can be obtained.

<2. Manufacturing method of film recommended body>

Next, a method of manufacturing the film recommended body will be described. The method of manufacturing a film recommendation body according to the present embodiment includes a first surface (concave surface) having a thickness of both ends in a width direction greater than the thickness of a central portion along a longitudinal direction, and a flat second surface formed on the opposite side of the first surface. An adhesive film having a (flat surface) and a peeling film having a medium peeling surface having a relatively high peeling force and a light peeling surface having a relatively low peeling force are in contact with the first peeling surface of the adhesive film and the peeling film , It is recommended for the core of the reel member so that the second surface of the adhesive film and the light peeling surface of the release film are in contact.

First, a release film having a medium peeling surface having a relatively high peeling force and a light peeling surface having a relatively low peeling force is prepared, and a composition of an adhesive film is applied on the light peeling surface to have a predetermined thickness. This makes it possible to deposit the adhesive film on the medium peeling surface when drawn after being recommended. As the composition of the adhesive film, known ones such as ACF (Anisortropic Conductive Film) and NCF (Non Conductive Film) can be used.

8 is a partial cross-sectional view schematically showing a wide adhesive film (fabric). As shown in FIG. 8, after forming a wide adhesive film (fabric), it is preferable to attach the cover film 7 on the adhesive film because of foreign matter mixing during cutting.

9 is a cross-sectional view schematically showing the adhesive film of the slit process. In the slit process, a wide adhesive film is cut to a predetermined width. At the time of this cutting, a concave surface is formed in the adhesive film due to the influence of the strength difference between the release film 3 and the cover film 7 and the engagement blade. As a result, when the concave surface is observed from above the film, a line indicating a step difference in the concave portion substantially parallel to the longitudinal direction may be observed. In addition, although the line showing the step difference in the concave portion may be a straight line, there may be a case where a part is bent or cut in the middle and a non-linear part exists. After cutting, the film recommended body 1 can be obtained by peeling off the cover film 7 and recommending the adhesive film 2 and the peeling film 3 to the reel 4.

Here, the film recommended body of the first structural example shown in FIG. 4 is reeled so that the laminated film in which the flat surface of the adhesive film 2 and the light peeling surface of the release film 3 contact, the adhesive film 2 side is the inner circumferential side. Can be obtained by recommending on.

Moreover, the film recommended body of the 2nd structural example shown in FIG. 6 is reeled so that the laminated film which the flat surface of the adhesive film 2 and the light peeling surface of the peeling film 3 contact, and the adhesive film 2 side become an outer peripheral side. Can be obtained by recommending on.

Moreover, the adhesive film (2) side is the outer peripheral side, or the laminated film in which the concave surface of the adhesive film (2) drawn out from the film recommended body of the first structural example or the second structural example is in contact with the middle peeling surface of the release film (3), or It may be obtained by recommending it to another reel to be the inner circumferential side.

<3. Manufacturing method of connection structure>

The manufacturing method of the connection structure which concerns on this embodiment is the 1st surface (concave surface) in which the thickness of the both ends of the width direction along the longitudinal direction was larger than the thickness of the center part, and the flat 2nd surface formed on the opposite side of the 1st surface ( It has an adhesive film having a flat surface), a medium peeling surface having a relatively high peeling force, a peeling film having a light peeling surface having a relatively low peeling force, and a reel member recommending the adhesive film and the peeling film to the core, and adhering From the film recommendation body made by recommending that the first side of the film and the middle peeling surface of the release film are in contact with the second side of the adhesive film and the light peeling side of the release film, the first side of the adhesive film and the middle thin film of the release film The laminated film with which the back surface comes into contact is pulled out, the second side of the adhesive film is temporarily adhered to the first adherend, the release film is peeled, the second circuit member is placed on the adhesive film, and the main film is pressed. A.

The first circuit member and the second circuit member are not particularly limited and can be appropriately selected according to the purpose. As a 1st circuit member, glass substrates, such as a plasma display panel (PDP) use, a liquid crystal display (LCD) panel use, a printed wiring board (PWB), etc. are mentioned, for example. Moreover, as a 2nd circuit member, flexible printed circuits (FPC), such as chip on film (COF), a tape carrier package (TCP) board, IC (Integrated Circuit), etc. are mentioned, for example.

According to the manufacturing method of the connection structure which concerns on this embodiment, since the flat surface of the adhesive film is stuck to the 1st circuit member, excellent provisional adhesiveness can be obtained. Moreover, since the concave surface of the adhesive film is lost due to the crimping of the second circuit member during this crimping, excellent adhesive strength can be obtained.

<4. Example>

Example

<4.1 1st Example>

Hereinafter, a first embodiment of the present invention will be described. In the first embodiment, a peeling film having a different peeling force was used, and the radical ACF was wound in a so-called inner winding configuration to prepare a film recommended body. Then, the electrodeposition property of ACF and the temporary tackiness when ACF was taken out were evaluated. In addition, this invention is not limited to these Examples.

[Measurement of peeling force of peeling film]

The peel force of the peeling film was measured using the same radical ACF composition as in Example. The radical-based ACF composition is phenoxy resin (trade name: YP-50, manufactured by Shinnitetsu Chemical Co., Ltd.) 50 parts by mass, bifunctional acrylic monomer (trade name: A-200, manufactured by Shin-Nakamura Chemical Co., Ltd.) 20 parts by mass , Urethane acrylate (trade name: U-2PPA, manufactured by Shin-Nakamura Chemical Co., Ltd.) 20 parts by mass, dilauroyl peroxide (trade name: Nipper BW, manufactured by Nippon Oil Co., Ltd.) 5 parts by mass, and conductive particles ( : AUL704, manufactured by Sekisui Chemical Co., Ltd.) 5 parts by mass was obtained by uniformly mixing by a conventional method. The radical ACF composition was coated on a PET film that was not peeled off at a thickness of about 38 μm so that the thickness after drying was 25 μm, dried, and prepared a radical ACF with PET having a width of 5 cm.

The radical system ACF with PET was attached to a measuring surface of a 5 cm wide release film using a 2 kg roller, and the peel strength after 30 minutes was measured according to the 180 ° peel strength test (JIS K 6854-2) (tape peel , Peeling angle 180 °, peeling speed 300 mm / min).

[Evaluation of electrodeposition property]

ACF was taken out from the reel over a length of 200 m, the length of the electrodeposition state in which the release film was adhered to the concave surface of the ACF was measured, and the electrodeposition ratio was calculated. Then, the electrodeposition property was evaluated by the following index.

A: Electrodeposition ratio is 90% or more and 100% or less

B: Electrodeposition ratio is 50% or more and less than 90%

C: Electrodeposition ratio is less than 50%

[Evaluation of temporary adhesiveness]

Ten sheets of ACF drawn out from the reel were temporarily adhered to the 0.7 mm thick man glass under the following conditions, and the release film was peeled off. After peeling of the release film, the number of successful sheets in the state where ACF was temporarily adhered to the bare glass was counted. Then, the tackiness was evaluated by the following index.

Bonding conditions: Temperature 60 ℃-Pressure 1 ㎫-Time 1 sec

Buffer material: silicone rubber (200 μm thick)

A: 8 to 10 successes

B: The number of successes is 3-7

C: Number of successes 0 to 2

[Example 1]

A release film having an A surface having a peel force (Ta) of 0.05 N / cm and a B surface having a peel force (Tb) of 0.01 N / cm was prepared.

Phenoxy resin (trade name: YP-50, manufactured by Shinnitetsu Chemical Co., Ltd.) 50 parts by mass, bifunctional acrylic monomer (brand name: A-200, manufactured by Shin-Nakamura Chemical Co., Ltd.) 20 parts by mass, urethane acrylate (brand name : U-2PPA, Shinnakamura Chemical Co., Ltd. 20 parts by mass, dilauroyl peroxide (trade name: Nipper BW, manufactured by Nippon Oil Co., Ltd.) 5 parts by mass, and conductive particles (Product name: AUL704, Sekisui Chemical 5 mass parts by the industrial company) The composition of the radical system ACF was prepared by uniformly mixing by a conventional method.

After applying the above-mentioned composition to the B side of the release film so as to have a thickness of 25 μm, the cover film was affixed and cut to a width of 0.15 cm to obtain an ACF of 200 m in length. In the cross-section schematically shown in FIG. 2, the ACF after this cutting step had a contact width Sa of the convex convex portion 2a of about 0.06 cm and a contact width Sb of the flat surface of 0.15 cm. .

Next, the cover film was removed, and the ACF and the release film were wound on a reel so that the ACF was disposed on the inner circumferential side, thereby obtaining a so-called inner film recommender. Table 1 shows the evaluation results of the film recommended body of Example 1.

[Example 2]

A film recommendation body was obtained in the same manner as in Example 1, except that a release film having an A surface having a peeling force (Ta) of 0.03 N / cm and a B surface having a peeling force (Tb) of 0.01 N / cm was prepared. Table 1 shows the evaluation results of the film recommended body of Example 2.

[Example 3]

A film recommended body was obtained in the same manner as in Example 1, except that a release film having an A surface with a peeling force (Ta) of 0.08 N / cm and a B surface with a peeling force (Tb) of 0.01 N / cm was prepared. Table 1 shows the evaluation results of the film recommended body of Example 3.

[Example 4]

A film recommended body was obtained in the same manner as in Example 1, except that a release film having an A surface having a peeling force (Ta) of 0.1 N / cm and a B surface having a peeling force (Tb) of 0.01 N / cm was prepared. Table 1 shows the evaluation results of the film recommended body of Example 4.

[Example 5]

The same as in Example 1, except that a release film having an A surface having a peeling force (Ta) of 0.05 N / cm and a B surface having a peeling force (Tb) of 0.01 N / cm was prepared and cut to a width of 0.20 cm. To obtain a film recommendation body. In the cross-section schematically shown in FIG. 2, the ACF after this cutting step had a contact width Sa of the convex convex portion 2a of about 0.08 cm and a contact width Sb of the flat surface of 0.20 cm. . Table 1 shows the evaluation results of the film recommended body of Example 5.

[Example 6]

The same as in Example 1, except that a release film having an A surface having a peel force (Ta) of 0.05 N / cm and a B surface having a peel force (Tb) of 0.01 N / cm was prepared and cut to a width of 0.10 cm. To obtain a film recommendation body. In the cross-section schematically shown in FIG. 2, the ACF after this cutting step had a contact width Sa of the convex convex portion 2a of about 0.03 cm and a contact width Sb of the flat surface of 0.10 cm. . Table 1 shows the evaluation results of the film recommended body of Example 6.

[Comparative Example 1]

A film recommended body was obtained in the same manner as in Example 1, except that a release film having an A surface having a peeling force (Ta) of 0.01 N / cm and a B surface having a peeling force (Tb) of 0.05 N / cm was prepared. Table 1 shows the evaluation results of the film recommended body of Comparative Example 1.

[Comparative Example 2]

A film recommended body was obtained in the same manner as in Example 1, except that a release film having an A surface having a peel force (Ta) of 0.02 N / cm and a B surface having a peel force (Tb) of 0.02 N / cm was prepared. Table 1 shows the evaluation results of the film recommended body of Comparative Example 2.

As in Comparative Example 1, when the adhesive film and the peeling film are recommended to be in contact with the flat surface and the medium peeling surface while the concave surface and the light peeling surface are in contact, the adhesive film and the peeling film are drawn out in an electrodeposition state where the peeling film is attached to the concave surface of the adhesive film. It was difficult, and temporary adhesion was difficult. In addition, as in Comparative Example 2, even in the case where the release film does not have a medium peeling surface and a light peeling surface, it is difficult to withdraw in an electrodeposition state, and provisional adhesion is difficult.

On the other hand, as in Examples 1 to 6, when the adhesive film and the peeling film are in contact with the concave surface and the medium peeling surface, and the flat surface and the light peeling surface are contacted, the electrodeposition of the peeling film adhered to the concave surface of the adhesive film It was able to withdraw in a state, and was able to temporarily adhere.

Further, from the value obtained by multiplying the 180 ° peeling force (Ta) of the medium peeling surface by the contact width (Sa) in the width direction between the concave surface and the heavy peeling surface, the 180 ° peeling force (Tb) of the light peeling surface is between the flat surface and the light peeling surface. When the difference value [(Ta × Sa)-(Tb × Sb)] minus the value multiplied by the width-wise contact width (Sb) was 0.3 mN or more and 4.5 mN or less, excellent electrodeposition properties and temporary tackiness were obtained.

<4.2 Second Example>

Hereinafter, a second embodiment of the present invention will be described. In the second embodiment, the so-called film recommendation body of the inner circle, the film recommender of the outer circle, and the film recommender having a concave surface on one side, and the film recommender having only a flat surface, electrodepositability, Adhesiveness and blocking resistance were evaluated. In addition, this invention is not limited to these Examples.

Measurement of the peeling force of the release film, evaluation of electrodeposition property, and evaluation of temporary adhesion were performed in the same manner as in the first embodiment.

[Evaluation of blocking resistance]

A double-sided flange-type reel member having a flange made of polystyrene having an average thickness of 1.5 mm and a winding core shaft portion having a diameter of 85 mm was used, and ACF and a release film were wound on the core shaft portion of the reel member under conditions of a winding tension of 20 g. . Then, the ACF wound on the reel member was taken out for 5 hours at a number of centimeters at a pulling tension of 70 g and a pulling speed of 500 mm / sec, and the number of occurrences of blocking in the state where the adhesive film could not be normally pulled out from the reel was counted.

A: The number of occurrences is 0 to 3

B: The number of occurrences is 4-10

C: The number of occurrences is 11 or more

[Example 1]

The blocking resistance of the film recommended body of Example 1 was evaluated. Table 2 shows the evaluation results of the film recommended body of Example 1.

[Example 7]

A film recommended body was obtained in the same manner as in Example 1, except that the ACF and the release film were wound on a reel so that the ACF was disposed on the outer circumferential side, and a so-called outer film recommended body was obtained. Table 2 shows the evaluation results of the film recommended body of Example 7.

[Reference example]

Example 1 except that a release film having an A surface having a peeling force (Ta) of 0.02 N / cm and a B surface having a peeling force (Tb) of 0.02 N / cm was prepared and cut so that both surfaces were flat. In the same manner, a film recommended body was obtained. Table 1 shows the evaluation results of the film recommended body of the reference example.

As in the reference example, when the adhesive film having both flat surfaces and the peeling film having the same peeling force on both sides are wound in a so-called inner winding configuration, the adhesive component of the adhesive film comes out in a large amount and adheres to the flange of the reel, There were many occurrences of blocking.

On the other hand, as in Example 7, when the adhesive film having a concave surface and the peeling film having a different peeling force were wound in a so-called outer winding configuration, the number of occurrences of blocking was small. This is considered to be because the amount of the adhesive component of the adhesive film projected out could be reduced by the gap formed in the central portion in the width direction of the concave surface.

In addition, as in Example 1, in the case of winding with a so-called inner winding configuration, the number of occurrences of blocking was less. This is considered to be because the adhesive film is present on the direction side to be pulled out by electrodeposition, so that the adhesive film can be pulled out by lifting the peeling film, so that it can be peeled off with strong force even when resin is attached to the flange.

1: film recommended body,
2: adhesive film,
3: release film,
4: reel,
5: Kwon Shim,
6: flange,
7: cover film

Claims (10)

An adhesive film having a first surface having a thickness at both ends in a width direction greater than the thickness of the central portion along a longitudinal direction, and a flat second surface formed on the opposite side of the first surface,
A release film having a medium peeling surface having a relatively high peeling force and a light peeling surface having a relatively low peeling force,
It is provided with a winding core to recommend the adhesive film and the release film,
The first surface of the adhesive film and the middle peeling surface of the peeling film are in contact with each other, and the second surface of the adhesive film and the light peeling surface of the peeling film are made to be recommended to the winding core,
From the value obtained by multiplying the 180 ° peeling force of the medium peeling surface by the contact width in the width direction between the first surface and the middle peeling surface, the 180 ° peeling force of the light peeling surface is equal to the width direction between the second surface and the light peeling surface. The film recommended body whose difference value minus the value multiplied by the contact width is 0.3 mN or more and 4.5 mN or less. According to claim 1,
A film-recommended body made by recommending a laminated film in which the second surface of the adhesive film and the light-peeling surface of the release film are in contact with the adhesive film side to be an inner circumferential side. According to claim 1,
A film-recommended body made by recommending a laminated film in which the first surface of the adhesive film and the middle peeling surface of the release film contact the outer side of the adhesive film. According to claim 1,
A film recommended body comprising flanges formed at both ends of the core. According to claim 1,
The film recommended body whose width of the said adhesive film is 0.6 mm-5.0 mm. The method of any one of claims 1, 4, and 5,
Recommended film, wherein the adhesive film is an anisotropic conductive film An adhesive film having a first surface in which the thickness of both ends in the width direction along the longitudinal direction is larger than the thickness of the central portion, and a flat second surface formed on the opposite side of the first surface, and a medium peeling surface having a relatively high peeling force, The peeling film having a light peeling surface having a relatively low peeling force, so that the first peeling surface of the adhesive film and the heavy peeling surface of the peeling film are in contact, and the second peeling surface of the adhesive film and the light peeling surface of the peeling film are in contact. Recommended for winding,
From the value obtained by multiplying the 180 ° peeling force of the medium peeling surface by the contact width in the width direction between the first surface and the middle peeling surface, the 180 ° peeling force of the light peeling surface is equal to the width direction between the second surface and the light peeling surface. The manufacturing method of a film recommended body whose difference value minus the value multiplied by the contact width is 0.3 mN or more and 4.5 mN or less. An adhesive film having a first surface having a thickness at both ends in the width direction greater than the thickness of the central portion along the longitudinal direction, and a flat second surface formed on the opposite side of the first surface, and a medium peeling surface having a relatively high peeling force, A peeling film having a light peeling surface having a relatively low peeling force, and a winding core recommending the adhesive film and the peeling film, and the first peeling film and the heavy peeling surface of the peeling film are in contact with the adhesive film From the film recommended body in which the second surface of the film and the light peeling surface of the release film are in contact, the laminated film in contact with the first release surface of the adhesive film and the medium peeling surface of the release film is withdrawn,
The second side of the adhesive film is temporarily adhered to the first circuit member, and the release film is peeled off,
A second circuit member is placed on the adhesive film, and the main crimped,
From the value obtained by multiplying the 180 ° peeling force of the medium peeling surface by the contact width in the width direction between the first surface and the middle peeling surface, the 180 ° peeling force of the light peeling surface is equal to the width direction between the second surface and the light peeling surface. The manufacturing method of the connection structure whose difference value minus the value multiplied by the contact width is 0.3 mN or more and 4.5 mN or less. The method of claim 7,
The said adhesive film is an anisotropic conductive film, The manufacturing method of a film recommended body. The method of claim 8,
The said adhesive film is an anisotropic conductive film, The manufacturing method of the connection structure.

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