KR101156253B1 - Releasing film and method for preparing the same - Google Patents

Abstract

The present invention, in the release film, a base film; Printed layer; And a release film including a release layer, wherein the printing layer is formed on one side of the base film, and the release layer is formed on the printing layer through a separation layer which does not directly contact the printing layer. The release film and its manufacturing method characterized by containing it provide an excellent release film which is colored but does not affect the physical properties of silicon in a manufacturing process.

Release Film, Printed Layer, Chargeable

Description

Release film and its manufacturing method {RELEASING FILM AND METHOD FOR PREPARING THE SAME}

The present invention relates to a silicone release film used for general industrial tape and IT electronic materials.

Existing silicone release films used in various industrial fields and IT electronics are colorless, transparent, or black, which makes it difficult to manufacture release films having various other colors.

 Therefore, when various release films showing different physical properties were used in manufacturing processes of various IT products such as liquid crystal display (LCD), PDDP, and mobile phone, there were many errors between workers and the defect rate between processes was considerable.

In the case of a colored printing layer on an existing release film, when contacted with silicon directly, the curing may be insufficient or a transition phenomenon may occur. In addition, even when the silicon layer and the print layer are separated on the product, even when the silicon layer and the print layer contact in a film roll to roll manufacturing process, there is a risk of insufficient curing or a transition phenomenon. Therefore, there was a need to develop a colored release film and its manufacturing process that do not affect the silicon properties.

The present invention as a silicone release film for solving the above problems, to provide a release film of various colors and a manufacturing method thereof in addition to the conventional transparent (colorless), white, black film.

In addition, to provide a release film excellent in chargeability, solvent resistance and durability, and a method for producing the same, having sufficient release property as an advantage in addition to color.

In order to achieve the above object, the present invention is a release film, a release film comprising a base film printing layer and a release layer, the printing layer is formed on one side of the base film, the release layer is a printing layer Provided is a release film, which is formed on a printing layer via a separation layer which does not come into direct contact with, and contains a silicone resin.

In addition, the present invention is a method for producing a release film, the first step of forming a printing layer on one side of the base film; Forming a primer layer on the printed layer; And it provides a method for producing a release film comprising a third step of forming a release layer containing a silicone resin in the primer layer.

In addition, the present invention provides a method for producing a release film, the first step of forming a printing layer on one side of the base film; Laminating the base film and another base film on the printed layer; And a third step of forming a release layer containing a silicone resin on the laminated base film of the second step.

In addition, the present invention is a method for producing a release film, the first step of forming a printing layer on one side of the base film; A second step of forming a release layer containing a silicone resin on one side of the base film and another base film; And a third step of laminating the other side of the base film of the second step to the printing layer of the first step.

The release film of this invention is a release film used for various industrial tapes, IT electronic materials, etc., and can apply not only conventional colorless transparent, white, black but various colors. Thus, when a release film showing a plurality of different physical properties in the manufacturing process is used, there is an advantage that can reduce the error between the operator and the defect rate between the process and the peel force difference between the release film that can not be distinguished with the naked eye by color.

In addition, the release film of the present invention shows an excellent effect of chargeability, solvent resistance and durability in addition to color.

Hereinafter, the release film and the manufacturing method according to the present invention will be described in detail.

In one embodiment of the present invention, the release film is a release film comprising a base film, a print layer and a release layer, the print layer is formed on one side of the base film, the release layer is directly with the print layer It is a release film formed on a printing layer via the spaced layer which does not contact, and contains a silicone resin.

In addition, in one embodiment of the present invention, the spacer layer is a release film, characterized in that the primer layer.

In addition, in one embodiment of the present invention, the spacer layer is a release film, characterized in that the base film and another base film.

In one embodiment of the present invention, the base film may be polyester-based or polyolefin-based. Preferably, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), polyethylene (poly etylene; PE) And it may be used in one or more selected from the group consisting of Polypropylene (PP).

In one embodiment of the present invention, the base film and the other base film of the separation layer is also the same as above, it is preferable that the base film and the base film of the separation layer is the same film.

In one embodiment of the present invention, the thickness of the base film is 5 to 250 μm, preferably 25 to 100 μm. At this time, if less than 5㎛ coating operation becomes difficult, if the thickness exceeds 250㎛ causes a cost increase, making the operation difficult. The same applies to the base film and the other base film of the separation layer.

In one embodiment of the present invention, the ink of the printing layer is not particularly limited as long as it is commonly used in the art, it is possible to use a pigment type ink.

In one embodiment of the invention, the coating thickness of the printed layer is 0.5 to 10㎛, preferably 1 to 3㎛. If it is less than 0.5 μm, the printing effect is less likely to appear, and if it is more than 10 μm, curing may be affected.

In one embodiment of the present invention, the silicone release layer may be used by a polysiloxane polymer having a group reactive to a group containing a Si—H bond in its molecule. Examples of groups reactive with groups containing Si—H bonds include alkenyl groups such as vinyl groups or hexenyl groups. In a non-limiting example, the silicon release layer may use 3705® (from Shin-Yestsu) or 7226® (from Dow Corning).

In one embodiment of the present invention, the coating thickness of the release layer is 0.1 to 1㎛, preferably 0.1 to 0.3㎛. If the thickness is less than 0.1 µm, the release film is not exhibited, and if it is more than 1 µm, blocking is likely to occur.

In one embodiment of the invention, the primer layer may comprise an acrylic binder resin or polyorgano siloxane. In this case, the acrylic is preferably a polyacrylic acid (Polyacrylic Acid). The polyorganosiloxane is preferably a polyorganosiloxane having a Si—H group. In this case, the catalyst is not particularly limited as long as it is commonly used in the art, and tin or platinum may be used according to non-limiting examples of primers used as conventional ones. In addition, the curing agent is not particularly limited as long as it is commonly used in the art, it is possible to use isocyanate as a non-limiting example.

The primer layer serves as a bridge between the print film-coated base film and the silicon release layer, which is preferable in obtaining excellent solvent resistance and durability, uniform thin film coating property, adhesion and processability. In addition, the primer layer has an effect of preventing the transition phenomenon between the printing layer and the silicon release layer, and does not inhibit the curing of the silicon release layer.

In one embodiment of the present invention, the primer layer may be an antistatic solution made of a conductive polymer polymer. The conductive polymer polymer may be PEDOT or PYRROLE, and WF-56® (manufactured by Nanochemtech) may be used as a non-limiting example. The conductive polymer polymer has an antistatic effect, thereby providing a film that is excellent in color and chargeability.

In one embodiment of the present invention, the coating thickness of the primer composition is 0.1 to 10㎛, preferably 1 to 3㎛. If it is less than 0.1 ㎛ may be affected by curing, and if it exceeds 10 ㎛ may block.

In one embodiment of the present invention, the method for producing a release film comprises a first step of forming a printing layer on one side of the base film; Forming a primer layer on the printed layer; And a third step of forming a release layer containing a silicone resin in the primer layer.

In one embodiment of the present invention, the method for producing a release film comprises a first step of forming a printing layer on one side of the base film; Laminating the base film and another base film on the printed layer; And a third step of forming a release layer containing a silicone resin on the laminated base film of the second step.

In one embodiment of the present invention, the method for producing a release film comprises a first step of forming a printing layer on one side of the base film; A second step of forming a release layer containing a silicone resin on one side of the base film and another base film; And a third step of laminating the other side of the base film of the second step to the printing layer of the first step.

In one embodiment of the present invention, the method for producing a release film comprises a first step of forming a printing layer on one side of the base film; A second step of forming a release layer containing a silicone resin on one side of the base film and another base film; And a third step of laminating the other side of the base film of the second step to the printing layer of the first step.

In one embodiment of the present invention, the formation of the print layer, primer layer or release layer is gravure coating (Gravure) coating, micro gravure (Micro Gravure) coating, Keith Gravure coating, Comma Knife (Comma Knife) coating, It can be formed by coating with one selected from roll coating, spray coating, mayer bar coating, slot die coating, reverse coating, flexo method and offset method. Can be.

In one embodiment of the present invention, the lamination may be formed using wet lamination or non-solvent dry lamination.

Hereinafter, the present invention will be described in detail with reference to examples of the present invention. These examples are only presented by way of example only to more specifically describe the present invention, it will be apparent to those of ordinary skill in the art that the scope of the present invention is not limited by these examples. .

≪ Comparative Example 1 &

 The printing layer was coated by a gravure coating method using a pigment type green series general purpose ink (IPC product) on the lower part of the polyester base film (SH71D 50 μm: SKC product), and a silicon layer 3705: ShinYets or 7226: Dow Corning) was coated by gravure coating. (Fig. 1)

≪ Example 1 >

The printing layer is coated by a gravure coating method using a pigment type green series general purpose ink (IPC product) on top of the polyester base film (SH71D 50㎛: SKC product), and an acrylic primer layer (KD-) on top of the printing layer. NYS TOP: Kyungdong Industrial Co., Ltd.) was coated by a gravure coating method, and a silicon layer (3705: Shin-Yets or 7226: Dow Corning product) was coated on the primer layer by a gravure coating method. (Figure 2)

<Example 2>

Except for coating the antistatic liquid (PEDOT) (WF-56: Nano Chemtech) as a primer layer in Example 1 was prepared in the same manner as in Example 1. (Fig. 3)

<Example 3>

As a base film, a printing layer is coated by a gravure coating method using a pigment-type green series general-purpose ink (IPC product) on top of a polyester film (SH71D 50 μm: SKC product). It laminated with the ester film (SH71D 50micrometer: SKC product) by the wet lamination system. Thereafter, a silicon layer (3705: Shin-Yetsu or 7226: Dow Corning) was coated on top of the other base film by a gravure coating method. (Figure 4)

[Antistatic verification experiment]

The chargeability of Comparative Example 1 and Examples 1 to 3 was measured using a surface resistance measuring instrument (ST-3: SIMCO). The experimental results are shown in Table 1 below.

[Solvent resistance test]

After isopropyl alcohol (IPA) was applied to the cotton swab, the film of Comparative Example 1 and Examples 1 to 3 was repeatedly rubbed 10 to 20 times. At this time, the minimum number of times the printed layer is peeled off is shown in Table 1 below.

Durability Check Experiment

After leaving the film of Comparative Example 1 and Examples 1 to 3 for 30 days in a harsh condition of 60 ℃, humidity 95%, durability was evaluated. As an evaluation method, peeling force was measured and compared.

Comparative Examples 1 and 1 to 3 were taped with a standard tape (TESA7475-acrylic, TESA7476-rubber) with a width of 50 mm and a length of 175 mm in the left, middle, and right machine directions, and then 10 mm using a FINAT test roller (2 kg load). After reciprocating two times at a rate of / sec, the specimens were stored for 20 hours at a temperature of 23 ± 2 ° C. at a pressure of 70 g / cm ² between flat metal plates or glass plates for sufficient compression. After storage the pressure was removed and the test was performed after 4 hours at a temperature of 23 ± 2 ° C. In the test, the Comparative Examples 1 and 1 to 3 were fixed to the jig, and the silicone adhesive was peeled off at a speed of 300 mm / min in an angular direction of 180 ° to measure an average value (gf / in) of the peel force. The results are shown in Table 1 below.

In Comparative Example 1 and Examples 1 to 3 of Table 1, there was no change in peel force, so that the durability was good, but in Example 3, it was found that Example 3 coated with the antistatic liquid was excellent. In terms of solvent resistance, the printing layer was peeled off when rubbed three times or more in the case of Comparative Example 1, Example 1 coated with an acrylic primer 5 to 10 or more times, Example 2 coated with an antistatic solution 5-7 When rubbed more than once, the printed layer was peeled off, and Examples 1 and 2 were superior in solvent resistance than Comparative Example 1. Moreover, in the case of Example 3, it was not peeled at all and it was confirmed that the solvent resistance was very excellent.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the present invention. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

1 is a schematic view showing the structure of a release film according to Comparative Example 1 of the present invention.

2 is a schematic view showing the structure of a release film according to Example 1 of the present invention.

3 is a schematic view showing the structure of a release film according to Example 2 of the present invention.

4 is a schematic view showing the structure of a release film according to Example 3 of the present invention.

&Lt; Brief Description of Drawings &

10 silicon release layer 20 base film

30: printed layer 40: acrylic primer layer

50: antistatic liquid primer layer

Claims (20)

delete delete In the release film, Base film; Printed layer; Spacing layer; And a release film containing a release layer, The print layer is formed on one side of the base film, The release layer is a release layer containing a silicone resin is formed on the printing layer via a separation layer that does not directly contact the printing layer, The release layer is a release film, characterized in that the base film and a different base film. The method of claim 3, wherein The base film is a release film, characterized in that the polyester-based or polyolefin-based. delete The method of claim 3, wherein Release film, characterized in that the thickness of the base film is 5 to 250㎛. The method of claim 3, wherein Release film, characterized in that the thickness of the printed layer is 0.5 to 10 ㎛. The method of claim 3, wherein The release layer comprises a release polyorganopolysiloxane having an alkenyl group. The method of claim 3, wherein Release film, characterized in that the thickness of the release layer is 0.1 to 10 ㎛. In the release film, Base film; Printed layer; Spacing layer; And a release film containing a release layer, The print layer is formed on one side of the base film, The release layer is a release layer containing a silicone resin is formed on the printing layer via a separation layer that does not directly contact the printing layer, The spacer layer is a primer layer, The primer layer is a release film, characterized in that containing an acrylic binder resin or polyorganosiloxane. The method of claim 10, The acrylic film is a release film, characterized in that the polyacrylic acid. The method of claim 10, The release film, characterized in that the polyorganosiloxane has a Si-H group. In the release film, Base film; Printed layer; Spacing layer; And a release film containing a release layer, The print layer is formed on one side of the base film, The release layer is a release layer containing a silicone resin is formed on the printing layer via a separation layer that does not directly contact the printing layer, The spacer layer is a primer layer, The primer layer is a release film, characterized in that the antistatic liquid consisting of a conductive polymer polymer. The method of claim 13, The conductive polymer is a release film, characterized in that the pedestal (PEDOT) or pyrrole (PYRROLE). In the release film, Base film; Printed layer; Spacing layer; And a release film containing a release layer, The print layer is formed on one side of the base film, The release layer is a release layer containing a silicone resin is formed on the printing layer via a separation layer that does not directly contact the printing layer, The spacer layer is a primer layer, Release film, characterized in that the thickness of the primer layer is 0.1 to 10 ㎛. delete delete delete In the manufacturing method of a release film, A first step of forming a printing layer on one side of the base film; Forming a primer layer on the printed layer; And A third step of forming a release layer containing a silicone resin in the primer layer, The printing layer, the primer layer or the release layer may be formed of a gravure coating, a micro gravure coating, a microgravure coating, a gravure coating, a comma knife coating, a roll coating, a spray coating Preparation of a release film characterized in that the coating is formed by one selected from spray coating, Meyer Bar coating, Slot Die coating, Reverse coating, Flexo method and offset method Way. In the manufacturing method of a release film, Forming a printed layer on one side of the base film; Laminating the base film and another base film on the printed layer; And A third step of forming a release layer containing a silicone resin on the laminated base film of the second step, The lamination is a method of manufacturing a release film, characterized in that formed using wet lamination (wet lamination) or non-solvent dry lamination (non-solvent dry lamination) method.

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