TWI703077B - Film roll body and method for manufacturing film roll body - Google Patents

Abstract

The present invention provides a film roll body that can obtain excellent temporary stickiness, and a method for manufacturing the film roll body. The film roll body is provided with: an adhesive film (2) having a first surface (concave surface) formed at both ends of the width direction along the length direction and having a thickness greater than the thickness of the central portion, and formed on the opposite side of the first surface A flat second surface (flat surface); a peeling film (3), which has a heavy peeling surface with a relatively high peeling force and a light peeling surface with a relatively low peeling force; and a reel (4), which will adhere to the film And the release film roll on the core; the film roll system uses the first side of the adhesive film 2 to contact the heavy release surface of the release film (3), and the second side of the adhesive film (2) and the release film (3) Rolled by lightly peeling surface contact.

Description

Film roll body and method for manufacturing film roll body

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

Conventionally, adhesive films such as ACF, NCF, etc. are obtained by cutting (cutting) a wide adhesive film into narrow strips with a width of 1 to 3 mm, for example. After the slitting step, one surface of the adhesive film is raised in the longitudinal direction, and the other surface is flat (for example, refer to Patent Document 1).

That is, the adhesive film after the slitting step has one surface (concave surface) formed in the longitudinal direction such that the thickness of both ends in the width direction is greater than the thickness of the central portion, and the other flat surface (flat surface).

In the case of using a film roll body wound with such an adhesive film, it is usually pulled out in a state where the flat surface of the adhesive film is bonded to the release film. Therefore, it is difficult to obtain excellent temporary adhesion properties on the concave surface of the adhesive film attached to the substrate or the like.

[Patent Document 1] JP 2012-102278 A

The present invention solves the above-mentioned problems in the prior art, and provides a film roll body that can obtain excellent temporary stickiness, and a manufacturing method of the film roll body.

In order to solve the above-mentioned problems, the method for manufacturing a film roll body of the present invention is characterized by comprising: an adhesive film having a first surface formed at both ends of the width direction along the longitudinal direction and having a thickness greater than the thickness of the central portion, and A flat second surface formed on the opposite side of the first surface; a peeling film having a heavy peeling surface with relatively high peeling force and a light peeling surface with relatively low peeling force; and a roll core, which is packaged as described above Adhesive film and said release film; wound on said core such that the first surface of said adhesive film is in contact with the heavy release surface of said release film, and the second surface of said adhesive film is in contact with the light release surface of said release film Become.

In addition, the method of manufacturing a film roll body of the present invention is characterized in that it has a first surface formed on both ends of the longitudinal direction in the width direction and whose thickness is greater than the thickness of the central portion, and formed on the first surface The adhesive film with the flat second side on the opposite side, and the release film with the heavy peeling surface with relatively high peeling force and the light peeling surface with relatively low peeling force, the first surface of the adhesive film and the peeling film The heavy peeling surface is in contact with the adhesive film and the second surface of the adhesive film is in contact with the light peeling surface of the peeling film.

In addition, the method of manufacturing the connection structure of the present invention is characterized in that the following film roll body is drawn from the following laminated film in which the first surface of the following adhesive film is in contact with the heavy peeling surface of the following release film Film, temporarily stick the second side of the following adhesive film to the first circuit member, peel off the release film, place the second circuit member on the following adhesive film and formally press-bond; wherein the film roll body has : Adhesive film, which has a first surface formed in the longitudinal direction such that the thickness of both ends in the width direction is greater than the thickness of the central portion, and a flat second surface formed on the opposite side of the first surface; release film, which A heavy peeling surface with a relatively high peeling force and a light peeling surface with a relatively low peeling force; and a core that wraps the adhesive film and the peeling film; the heavy peeling of the first surface of the adhesive film and the peeling film Face contact and the second surface of the adhesive film is in contact with the light peeling surface of the release film.

According to the present invention, the concave surface of the adhesive film is pulled out in a state where the release film is bonded, and the flat surface of the adhesive film is attached to the substrate or other adhered material, so that excellent temporary adhesion can be obtained.

1‧‧‧Film roll body

2‧‧‧Adhesive film

3‧‧‧Peeling film

4‧‧‧Reel

5‧‧‧Core

6‧‧‧Flange

7‧‧‧Cover film

Fig. 1 is a perspective view schematically showing an example of a film roll.

Fig. 2 schematically shows a cross-sectional view of the adhesive film.

Fig. 3 schematically shows a cross-sectional view of the adhesive film drawn from the film roll body.

4 is a cross-sectional view schematically showing the outermost peripheral side of the film package of the first configuration example on the A-A section of the film package shown in Fig. 2.

Fig. 5 is a cross-sectional view schematically showing the outermost peripheral side of the film package of the first configuration example on the A-A section of the film package shown in Fig. 2 at the time of drawing out.

Fig. 6 is a cross-sectional view schematically showing the outermost peripheral side of the film package of the second configuration example on the A-A cross section of the film package shown in Fig. 2 at the time of drawing out.

Fig. 7 is a cross-sectional view schematically showing a state where the film overflows and adheres to the flange on the A-A section of the film roll body shown in Fig. 2.

Fig. 8 schematically shows a partial cross-sectional view of a wide adhesive film (raw sheet).

Fig. 9 is a cross-sectional view schematically showing the adhesive film in the slitting step.

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

1. Film roll body

2. Manufacturing method of film roll body

3. Manufacturing method of connecting structure

4. Example

<1. Film roll body>

The film roll body of this embodiment includes: an adhesive film having a first surface (concave surface) formed at both ends in the width direction along the length direction and having a thickness greater than the thickness of the center portion, and formed on the opposite side of the first surface The flat second surface (flat surface); the peeling film, which has a heavy peeling surface with relatively high peeling force and a light peeling surface with relatively low peeling force; and a reel member, which rolls the adhesive film and the peeling film It is installed in the core; the film roll system is rolled up in such a way that the first side of the adhesive film is in contact with the heavy peeling surface of the release film, and then the second side of the film is in contact with the light release surface of the release film. Thereby, the concave surface of the adhesive film is pulled out in a state where the support film is bonded, and an adhesive material such as a substrate is attached to the flat surface of the adhesive film, so that excellent temporary adhesion can be obtained.

Fig. 1 is a perspective view schematically showing an example of the film package of this embodiment. As shown in Figure 1, the film roll body 1 is formed by winding the adhesive film 2 and the release film 3 on the reel 4 And formed.

FIG. 2 is a schematic cross-sectional view of the adhesive film, and FIG. 3 is a schematic cross-sectional view of the adhesive film when it is pulled out from the film roll.

Next, the film 2 has a first surface (concave surface) formed along the length direction such that the thickness of both ends in the width direction is greater 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 of the adhesive film 2 in the width direction is a concave shape. The two ends of the concave surface in the width direction are formed with convex portions 2a that are continuous in the length direction, and the central portion in the width direction of the concave surface is formed along the length. Concavity 2b with continuous direction. 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. In addition, 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 part 2a and the recessed part 2b is 5 micrometers or more, for example, and the upper limit value is 70% or less of a film thickness. In addition, the length of the adhesive film is, for example, 50 m to 5000 m.

Examples of the adhesive film 2 include an anisotropic conductive film (ACF: Anisotropic Conductive Film), an adhesive film (NCF: Non Conductive Film), and a conductive adhesive film for connecting the electrode of the solar cell and the bonding wire.

The release film 3 is a support film formed into a belt shape and supporting the adhesive film. As the base material used for the release film 3, for example, PET (Poly Ethylene Terephthalate, polyethylene terephthalate), OPP (Oriented Polypropylene, oriented polypropylene), PMP (Poly-4-methlpentene-1, Poly 4-methylpentene-1), PTFE (Polytetrafluoroethylene, polytetrafluoroethylene), etc.

The peeling film 3 has a heavy peeling surface with relatively high peeling force and a light peeling surface with relatively low peeling force. Here, the so-called heavy peeling surface with relatively high peeling force refers to the measurement under the same conditions When the peeling force of both sides of the peeling film 3 is determined, the peeling force is higher. The so-called light peeling surface with relatively low peeling force refers to the surface with the lower peeling force when the peeling force of the peeling film 3 is measured under the same conditions. The peeling force of the heavy peeling surface and the light peeling surface can be adjusted according to, for example, the type of release agent such as silicone, the surface roughness (Rz) of the substrate, and the like. In addition, as a method for measuring the peeling force, a 180° peel strength test (JIS K 6854-2), a 90° peel strength test (JIS K 6854-1), etc. can be mentioned.

In this embodiment, the value obtained by multiplying the contact width in the width direction between the concave surface and the heavy peeling surface by the peeling force of the heavy peeling surface is greater than multiplying the light contact width between the flat surface and the light peeling surface in the width direction. The value obtained from the peeling force of the peeling surface. Specifically, "the value obtained by multiplying the width of the contact width Sa between the concave surface and the heavy peeling surface by the 180° peeling force Ta of the heavy peeling surface" subtracts "the width between the flat surface and the light peeling surface" The difference of the value obtained by multiplying the contact width Sb in the direction by the 180° peeling force Tb of the light peeling surface [(Ta×Sa)-(Tb×Sb)] is preferably 0.3mN or more and 4.5mN or less, more preferably It is 0.5 mN or more and 3.0 mN or less, more preferably 1.0 mN or more and 2.5 mN or less. Thereby, the concave surface of the adhesive film and the support film are pulled out, and the flat surface of the adhesive film is stuck on the substrate or other adhered material, so that excellent temporary adhesion can be obtained.

The reel 4 has a cylindrical core 5 for winding the adhesive film 2 and the release film 3, and plate-shaped flanges 6 respectively provided at both ends of the core 5. The core 5 has a shaft hole for inserting a rotating shaft for rotating the reel 4. One end in the longitudinal direction of the adhesive film 2 or the release film 3 is connected to the winding core 5, and the adhesive film 2 and the release film 3 are wound.

The core 5 and the flange 6 can be formed using various plastic materials, for example. The flange 6 may also be subjected to electrostatic treatment on its contact surface with the adhesive film 2. As a method of carrying out the electrostatic treatment, for example, a method of applying a compound such as polythiophene to the flange 6 and the like. Furthermore, as shown in Figure 1 The film roll body has a structure in which an adhesive film is wound on a core 5 having flanges 6 at both ends, but it may be a structure in which an adhesive film is wound on a core without flanges.

[First configuration example]

4 is a cross-sectional view schematically showing the outermost peripheral side of the film package of the first configuration example on the A-A section of the film package shown in Fig. 2. As shown in FIG. 4, the release film 3 is in contact with the concave surface of the film 2 and the heavy peeling surface in the width direction with a predetermined contact width Sa, and the flat surface of the film 2 and the light peeling surface are in contact with the predetermined contact width Sb.

The film roll system of the first configuration example is configured by winding the laminated film in which the flat surface of the adhesive film 2 and the lightly peelable surface of the release film 3 are in contact with the adhesive film 2 side as the inner peripheral side.

Fig. 5 is a cross-sectional view schematically showing the outermost peripheral side of the film package of the first configuration example on the A-A section of the film package shown in Fig. 2 when it is drawn out. As shown in FIG. 5, the peeling film 3 on the outermost periphery is peeled off for one week, and the adhesive film 2 is pulled out while being in contact with the peeling film 3 on the inner periphery when being pulled out.

[Second configuration example]

Fig. 6 is a cross-sectional view schematically showing the outermost peripheral side of the film package of the second configuration example on the A-A section of the film package shown in Fig. 2 when it is drawn out. The film roll system of the second configuration example is configured by wrapping the laminated film in which the flat surface of the adhesive film 2 and the lightly peelable surface of the release film 3 are in contact with each other so that the adhesive film 2 side becomes the outer peripheral side. As shown in FIG. 6, the adhesive film 2 on the outermost periphery is peeled off for one week, and the adhesive film 2 is pulled out while being in contact with the peeling film 3 on the outer periphery side when pulling out.

[About blocking resistance]

Fig. 7 is a cross-sectional view schematically showing a state where the film overflows and adheres to the flange on the A-A section of the film roll body shown in Fig. 2. The film roll body sometimes expands and contracts due to temperature, The drawing operation and the like cause the rolling pressure of the adhesive film 2. As a result, the resin (adhesive component) of the adhesive film 2 may flow to the "one end in the width direction along the length of the resin" to the outside, and may overflow from the side surface of the release film 3. As shown in Fig. 7, if the resin of the adhesive film 2 overflows from the side of the peeling film 3, the resin of the adhesive film will sometimes adhere to the side of the flange 6 of the reel, resulting in adhesion that prevents the adhesive film from being pulled out normally. .

The film roll body of this embodiment has a first surface (concave surface) formed at both ends in the width direction along the length direction and having a thickness greater than the thickness of the central portion, and a flat second surface formed on the opposite side of the first surface. Adhesive film roll on the surface (flat surface). Therefore, as shown in FIGS. 2 and 3, between the concave surface of the adhesive film 2 and the release film 3, the concave part 2b is formed continuously along the longitudinal direction. In this way, a gap created by the recessed portion 2b is formed between the concave surface of the adhesive film 2 and the release film 3, whereby when the rolling pressure is generated, the force of the rolling pressure can be relieved, and the resin of the adhesive film 2 can flow to The void created by the recess 2b. Therefore, the overflow of the resin can be suppressed, and excellent blocking resistance can be obtained.

In addition, according to the film roll body of the first configuration example, since the adhesive film is present on the side in the direction in which the film is drawn out, the adhesive film 2 can be pulled up by the peeling film 3. Therefore, even if resin is attached to the flange 6, it can be peeled off with such a strong force that can eliminate the adhesion, so that excellent adhesion resistance can be obtained.

<2. Manufacturing method of film roll package>

Next, the manufacturing method of the film roll body is demonstrated. The method of manufacturing the film roll body of this embodiment is to have a first surface (concave surface) formed on the opposite side of the first surface and the first surface (concave surface) formed on the opposite side of the first surface with the thickness of both ends formed in the width direction along the length direction being greater than the thickness of the central part. Adhesive film on the second side (flat surface), and release film with a relatively high peeling force and a light peeling surface with relatively low peeling force. The first side of the adhesive film and the heavy peeling surface of the release film Contact and adhere to the second film It is wound on the core of the reel member in such a way that the surface is in contact with the light peeling surface of the release film.

First, prepare a release film having a heavy peeling surface with relatively high peeling force and a light peeling surface with relatively low peeling force, and apply the composition of the adhesive film on the light peeling surface to have a predetermined thickness. Thereby, when pulling out after the package, the adhesive film can be transferred to the heavy peeling surface. As the composition of the adhesive film, known ones such as ACF (Anisotropic Conductive Film) and NCF (Non Conductive Film) can be used.

Fig. 8 schematically shows a partial cross-sectional view of a wide adhesive film (raw sheet). As shown in FIG. 8, after forming a wide adhesive film (raw material sheet), since foreign matter is mixed in during cutting, it is preferable to attach the cover film 7 on the adhesive film.

Fig. 9 is a cross-sectional view schematically showing the adhesive film in the slitting step. In the cutting step, the wide adhesive film is cut into a prescribed 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 cutting blade. Therefore, when the concave surface is observed from above the film, a line representing the step difference of the concave portion that is substantially parallel to the longitudinal direction may be observed. Furthermore, the line representing the step difference of the recess may also be straight, but some may be bent or some may be interrupted, and there may be non-straight parts. After cutting, the cover film 7 is peeled off, and the adhesive film 2 and the release film 3 are wound on the reel 4, whereby the film roll body 1 can be obtained.

Here, the film roll body of the first configuration example shown in FIG. 4 can be a laminated film in which the flat surface of the adhesive film 2 is in contact with the light release surface of the release film 3 so that the adhesive film 2 side becomes the inner peripheral side. It is obtained by mounting on a reel.

In addition, the film roll body of the second configuration example shown in FIG. 6 can be wound with a laminate film in which the flat surface of the adhesive film 2 is in contact with the light release surface of the release film 3 so that the adhesive film 2 side becomes the outer peripheral side Obtained on reel.

In addition, a laminated film in which the concave surface of the adhesive film 2 drawn from the film roll body of the first configuration example or the second configuration example is in contact with the heavy peeling surface of the release film 3 may be used to make the adhesive film 2 side the outer periphery It is obtained by winding it on other reels by means of side or inner circumference side.

<3. Manufacturing method of connecting structure>

The manufacturing method of the connection structure of this embodiment is to pull out the laminated film in which the first side of the following adhesive film is in contact with the heavy peeling surface of the release film, and the second of the following adhesive film The surface is temporarily attached to the first adherend, the release film is peeled off, and the second circuit member is placed on the adhesive film and formally crimped; wherein the film roll body includes: an adhesive film having a width formed along the length direction The first surface (concave surface) whose thickness at both ends of the direction is greater than that of the central portion and the flat second surface (flat surface) formed on the opposite side of the first surface; release film, which has relatively high peeling force The heavy peeling surface and the light peeling surface with relatively low peeling force; and, the reel member, which rolls the adhesive film and the release film on the core; the film roll system uses the first side of the adhesive film and the weight of the release film It is rolled up in such a way that the peeling surface is in contact with the second surface of the film and the light peeling surface of the peeling film.

The first circuit member and the second circuit member are not particularly limited, and can be appropriately selected according to the purpose. Examples of the first circuit member include glass substrates and printed wiring boards (PWB) for plasma display panel (PDP) applications, LCD (Liquid Crystal Display) panel applications, and the like. Moreover, as the second circuit member, for example, flexible printed circuits (FPC: Flexible Printed Circuits) such as COF (Chip On Film), tape carrier package (TCP) substrates, IC (Integrated Circuit), and the like can be mentioned.

According to the manufacturing method of the connection structure of the present embodiment, the flat surface of the adhesive film is attached to the first circuit member, so that excellent temporary attachability can be obtained. In addition, the concave surface of the adhesive film is eliminated by the crimping of the second circuit member during the actual crimping, so that excellent adhesive strength can be obtained.

<4. Example>

[Example]

<4.1 First Embodiment>

Hereinafter, the first embodiment of the present invention will be described. In the first example, release films with different peeling forces were used, and the radical-based ACF was wound in a so-called inward winding configuration to produce a film package. Then, the ACF's transferability and temporary adhesion when the ACF is pulled out are evaluated. Furthermore, the present invention is not limited to these embodiments.

[Measurement of peeling force of peeling film]

Using the same radical-based ACF composition as in the examples, the peeling force of the peeling film was measured. The radical-based ACF composition is made of 50 parts by mass of phenoxy resin (trade name: YP-50, manufactured by Nippon Steel Chemical Co., Ltd.) and a bifunctional acrylic monomer (trade name: A-200, Shinnakamura Chemical Co., Ltd. 20 parts by mass, urethane acrylate (trade name: U-2PPA, manufactured by Shinnakamura Chemical Co., Ltd.) 20 parts by mass, dilaurel peroxide (trade name: Nyper-BW, Nippon Oil & Fats Co., Ltd.) ) Manufacturing) 5 parts by mass and 5 parts by mass of conductive particles (product name: AUL704, manufactured by Sekisui Chemical Industry Co., Ltd.) are uniformly mixed and obtained by a normal method. The radical-based ACF composition was coated on an unpeeled PET film with a thickness of approximately 38 μm so that the thickness after drying became 25 μm, and dried to produce a radical-based ACF with PET with a width of 5 cm.

Use a 2kg roller to attach the free radical ACF with PET to the measuring surface of a peeling film with a width of 5 cm. According to the 180° peel strength test (JIS K 6854-2), measure the peeling force after 30 minutes (tape peeling, peeling angle) 180°, peeling speed 300mm/min).

[Evaluation of transferability]

Pull out the ACF from the reel to a length of 200m, and measure it on the concave surface of the ACF followed by the rotation of the release film After the length of the state, calculate the transfer rate. Then, the transferability was evaluated based on the following indicators.

A: The transfer ratio is above 90% and below 100%

B: The transfer rate is above 50% and less than 90%

C: The transfer rate is less than 50%

[Evaluation of Temporary Posting]

Ten sheets of ACF drawn from the reel were temporarily pasted on the original glass of thickness 0.7mm under the following conditions, and the release film was peeled off. After the peeling film is peeled off, count the number of successful sheets with ACF temporarily attached to the original glass. Then, evaluate the temporary stickiness based on the following indicators.

Joining conditions: temperature 60℃-pressure 1MPa-time 1sec

Buffer material: silicone rubber (thickness 200μm)

A: The number of successful pieces is 8~10 pieces

B: The number of successful films is 3~7

C: The number of successful pieces is 0~2 pieces

[Example 1]

Prepare a release film with a peeling force Ta of 0.05 N/cm on side A and a peeling force Tb of 0.01 N/cm on side B.

By adding 50 parts by mass of phenoxy resin (trade name: YP-50, manufactured by Nippon Steel Chemical Co., Ltd.), a bifunctional acrylic monomer (trade name: A-200, manufactured by Shinnakamura Chemical Co., Ltd.) 20 Parts by mass, urethane acrylate (trade name: U-2PPA, manufactured by Shinnakamura Chemical Co., Ltd.) 20 parts by mass, dilaurel peroxide (trade name: Nyper-BW, manufactured by Nippon Oil & Fats Co., Ltd.) 5 parts by mass, And conductive particles (product name: AUL704, manufactured by Sekisui Chemical Industry Co., Ltd.) 5 parts by mass are uniformly mixed by a usual method to prepare a radical-based ACF composition.

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

Next, the cover film is peeled off, and the ACF and the release film are wound on the reel so that the ACF is arranged on the inner peripheral side to obtain a so-called inwardly rolled film package. Table 1 shows the evaluation results of the film package of Example 1.

[Example 2]

A film roll body was obtained in the same manner as in Example 1, except that a release film having a side A with a peeling force Ta of 0.03 N/cm and a side B with a peeling force Tb of 0.01 N/cm was prepared. Table 1 shows the evaluation results of the film package of Example 2.

[Example 3]

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

[Example 4]

A film roll was obtained in the same manner as in Example 1, except that a release film having a side A with a peeling force Ta of 0.1 N/cm and a side B with a peeling force Tb of 0.01 N/cm was prepared. Table 1 shows the evaluation results of the film package of Example 4.

[Example 5]

In addition to preparing the A side with a peeling force Ta of 0.05N/cm, and a peeling force Tb of 0.01N/ The release film on the B side of cm was cut to a width other than 0.20 cm, and the film roll was obtained in the same manner as in Example 1. In the cross section schematically shown in FIG. 2 for the ACF after the cutting step, the contact width Sa of the convex portion 2a of the concave surface is about 0.08 cm, and the contact width Sb of the flat surface is 0.20 cm. Table 1 shows the evaluation results of the film package of Example 5.

[Example 6]

A film roll was obtained in the same manner as in Example 1, except that a peeling film having a peeling force Ta of 0.05N/cm on side A and a peeling film on B side with a peeling strength of 0.01N/cm and cut into a width of 0.10cm was prepared. Body. In the cross section schematically shown in FIG. 2 for the ACF after the cutting step, the contact width Sa of the convex portion 2a of the concave surface is about 0.03 cm, and the contact width Sb of the flat surface is 0.10 cm. Table 1 shows the evaluation results of the film package of Example 6.

[Comparative Example 1]

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

[Comparative Example 2]

A film roll body was obtained in the same manner as in Example 1, except that a release film having a side A with a peeling force Ta of 0.02 N/cm and a side B with a peeling force Tb of 0.02 N/cm was prepared. Table 1 shows the evaluation results of the film package of Comparative Example 2.

As in Comparative Example 1, when the adhesive film and the release film are wound in such a way that the concave surface is in contact with the light release surface and the flat surface is in contact with the heavy release surface, it is difficult to transfer the release film to the concave surface of the adhesive film. Pulling out with the status, it is difficult to post temporarily. Also, as in Comparative Example 2, even when the release film does not have a heavy peeling surface and a light peeling surface, it is difficult to pull out in the transferred state, and it is difficult to temporarily stick.

On the other hand, as in Examples 1 to 6, when the adhesive film and the release film are wound in such a way that the concave surface is in contact with the heavy release surface, and the flat surface is in contact with the light release surface, the concave surface of the adhesive film can be bonded When the peeling film is attached, it can be pulled out and temporarily pasted.

Also, subtract "the value obtained by multiplying the width of the contact width Sa between the concave surface and the heavy peeling surface by the 180° peeling force Ta of the heavy peeling surface" from "the width between the flat surface and the light peeling surface" The difference between the contact width Sb multiplied by the 180° peeling force Tb of the light peeling surface [(Ta×Sa)-(Tb×Sb)] is 0.3mN or more and 4.5mN or less, so that excellent Adhesion and temporary attachment.

<4.2 Second embodiment>

Hereinafter, the second embodiment of the present invention will be described. In the second embodiment, the so-called Inner-rolled film rolls, outward-rolled film rolls, film rolls with a concave surface on one side, and film rolls with only flat surfaces, evaluate their transferability and temporary attachment Performance, and resistance to adhesion. Furthermore, the present invention is not limited to these embodiments.

The measurement of the peeling force of the peeling film, the evaluation of the transferability, and the evaluation of the temporary adhesion were performed in the same manner as in the first example.

[Evaluation of blocking resistance]

Using a double-sided flange-type reel member with a reel core with a diameter of 85mm and a flange made of polystyrene with an average thickness of 1.5mm, the ACF and release film are wound under the condition of a winding tension of 20g To the core part of the reel component. Then, the ACF wound to the reel member is pulled out for 5 hours at a drawing tension of 70g and a drawing speed of 500mm/sec in units of several centimeters. The number of consecutive generations is counted.

A: The number of generations is 0~3

B: The number of generations is 4~10

C: The number of occurrences is 11 or more

[Example 1]

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

[Example 7]

The ACF and the release film were wound on the reel so that the ACF was arranged on the outer peripheral side to obtain a so-called out-wound film package, except that the film package was obtained in the same manner as in Example 1. Table 2 shows the evaluation results of the film package of Example 7.

[Reference example]

It was obtained in the same manner as in Example 1, except that a release film having a peeling force Ta of 0.02N/cm on side A and a peeling film on B side with a peeling strength of 0.02N/cm was prepared and cut so that both sides became flat. Film roll body. Table 1 shows the evaluation results of the film package of Comparative Example 3.

As in the reference example, when the adhesive film on both sides is flat and the release film with the same peeling force on both sides is wound in a so-called inward-rolling configuration, the adhesive component of the adhesive film overflows in large quantities and adheres to the convexity of the reel. Because of this, there are more occurrences of adhesion.

On the other hand, as in Example 7, when an adhesive film having a concave surface and a release film having a different peeling force are wound in a so-called roll-out configuration, the number of occurrences of blocking is small. The reason for this is considered to be that the amount of overflow of the adhesive component of the adhesive film can be reduced by the void formed in the center portion of the width direction of the concave surface.

Furthermore, as in Example 1, in the case of winding in a so-called inward winding configuration, the number of occurrences of blocking is smaller. It is considered that the reason is that the adhesive film is present on the side of the pull-out direction due to the transfer, so that the adhesive film can be pulled out by pulling up the release film. Therefore, even if the resin adheres to the flange, the adhesive film can be pulled out. Peel it off with strong force.

1‧‧‧Film roll body

2‧‧‧Adhesive film

3‧‧‧Peeling film

4‧‧‧Reel

5‧‧‧Core

6‧‧‧Flange

Claims (11)

A film roll body, comprising: an adhesive film having a first surface formed at both ends of the width direction along the length direction with a thickness greater than the thickness of the central portion, and a flat first surface formed on the opposite side of the first surface 2 sides; peeling film, which has a heavy peeling surface with relatively high peeling force and a light peeling surface with relatively low peeling force; and a roll core, which rolls the adhesive film and the peeling film; the film roll system The first surface of the adhesive film is in contact with the heavy release surface of the release film, and the second surface of the adhesive film is in contact with the light release surface of the release film. For example, the film roll body of the first item of the scope of patent application, wherein the value obtained by multiplying the contact width in the width direction between the first surface and the heavy peeling surface by the peeling force of the heavy peeling surface is greater than The value obtained by multiplying the contact width in the width direction between the two sides and the light peeling surface by the peeling force of the light peeling surface. For example, the film roll body of item 1 of the scope of patent application, in which the value obtained by multiplying the contact width in the width direction between the first surface and the heavy peeling surface by the 180° peeling force of the heavy peeling surface is subtracted The difference in the value obtained by multiplying the contact width in the width direction between the second surface and the light peeling surface by the 180° peeling force of the light peeling surface is 0.3 mN or more and 4.5 mN or less. For example, the film roll body of the first item of the scope of patent application, which is a laminated film in which the second surface of the adhesive film is in contact with the light release surface of the release film, and the adhesive film side becomes the inner peripheral side. . For example, the film roll body of the first item in the scope of patent application is formed by winding a laminated film in which the first surface of the adhesive film and the heavy peeling surface of the release film are in contact with the adhesive film side as the outer peripheral side. For example, the film roll body of item 1 of the scope of patent application is formed by arranging flanges on both ends of the above-mentioned roll core. For example, the film roll body of item 1 in the scope of patent application, wherein the width of the adhesive film is 0.6mm~5.0mm. Such as the film roll body of any one of the 1st to 7th patents, wherein the adhesive film is an anisotropic conductive film. A method for manufacturing a film roll body, which includes a first surface having both ends formed in the width direction along the length direction and having a thickness greater than the thickness of the central portion, and a flat second surface formed on the opposite side of the first surface The first surface of the adhesive film is in contact with the heavy peeling surface of the peeling film, and the peeling film has a heavy peeling surface with relatively high peeling force and a light peeling surface with relatively low peeling force. Then, the second surface of the film is in contact with the lightly peeled surface of the above-mentioned release film and is wound on the core. A method of manufacturing a connecting structure, which is free from the following film roll body, pulling out the laminated film with the first side of the following adhesive film in contact with the heavy peeling surface of the following release film, and placing the first side of the following adhesive film Two sides are temporarily pasted on the first circuit member, and the release film is peeled off, the second circuit member is placed on the following adhesive film and formally crimped; the film roll body is equipped with: an adhesive film, which has a lengthwise formation It is a first surface where the thickness of both ends in the width direction is greater than the thickness of the central part and a flat second surface formed on the opposite side of the first surface; a release film which has a heavy release surface with relatively high release force and Relative peel force The lower light peeling surface; and, the core, which wraps the adhesive film and the peeling film; the first surface of the adhesive film is in contact with the heavy peeling surface of the peeling film and the second surface of the adhesive film is with the peeling The light peeling surface of the film touches. Such as the manufacturing method of the connection structure of the 10th patent application, wherein the adhesive film is an anisotropic conductive film.

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