KR102559057B1 - Improved releasing paper - Google Patents

Abstract

The present invention relates to an improved release paper and a manufacturing method thereof, and more particularly, to an improved release paper produced by a dry laminating method using a PP or PET film and a method for manufacturing the same, which compensate for the disadvantages of non-uniform smoothness, low heat resistance, use of expensive raw materials, and environmental disadvantages of the PE release paper produced by the conventional T-DIE laminating method. The PP film or PET film dry laminating release paper according to the present invention compensates for the disadvantages of conventional PE release paper, that is, T-DIE laminating release paper, such as uneven smoothness, low heat resistance, use of expensive raw materials, and environmental disadvantages. It is an eco-friendly product that reduces the amount of plastic used by using a PP film or PET film with excellent physical properties and paper and dry laminating to reduce the amount of plastic used by reducing the coating thickness and uniform smoothness.

Description

Release paper with improved smoothness {Improved releasing paper}

The present invention relates to a release paper with improved smoothness and a manufacturing method thereof, and more particularly, to an improved release paper produced by a dry laminating method using a PP or PET film and a method for manufacturing the same, which compensate for the disadvantages of non-uniform smoothness, low heat resistance, use of expensive raw materials, and environmental disadvantages of the PE release paper produced by the conventional T-DIE laminating method.

Annual paper consumption in Korea is about 7 to 8 million tons per year, equivalent to cutting down 100 million 30-year-old trees, and 17 30-year-old trees are consumed to produce 1 ton of paper. Paper was obtained by destroying the primeval forest, which is said to be the lungs of the earth. One ton of paper produces 6.3 tons of carbon dioxide. There are many causes of global warming, but pulp, which makes trees disappear from forests, is one of the reasons.

On the other hand, release paper is also called release paper as paper attached to the adhesive surface to protect the adhesive surface, and protects the surface by contacting the adhesive surface of adhesive tape, pressure-sensitive adhesive paper, label, thread, etc. The surface is processed so that it can be peeled off when in use to achieve the purpose.

Release papers currently produced and used are classified into two types. There are general release papers in which silicon is coated after PE (polyethylene) coating on the paper surface using the extrusion coating lamination method, and non-PE release papers in which silicon is applied directly to the paper.

The disadvantage of this general release paper is, firstly, that the smoothness (uniformity) of the general release paper follows the smoothness of the paper as it is produced by coating PE (LDPE + HDPE) on the paper in a roll state, and the thickness deviation of the paper is usually ± 10㎛ or more. There is a difference in thickness deviation.

Second, there is a difference in physical properties. The heat resistance of PE itself is 110 ~ 120 ℃, which is a universal plastic that is widely used as a raw material that is easy to process at low temperatures.

When the instantaneous temperature of the coated PE exceeds 110 degrees, it causes deformation and becomes a factor of failure. Since the work is done at low temperature and low line speed (less than 40m per minute), the production volume is inevitably low.

Third, the choice of paper is small. The reason is that the products managed due to the surface and smoothness of the paper are limited. Other materials are only PE (LDPE, HDPE), so there was a problem that extrudable raw materials were limited.

Therefore, not only can these problems be solved, but it can be manufactured for all papers, provides an eco-friendly product by reducing the amount of pulp by increasing the amount of waste paper (recycled paper), and uses PP, PET, etc. There is a need for a technology for manufacturing release paper in a way that can use various raw materials.

Korea Registration No. 10-0806982 (February 18, 2008) Korean Registration No. 10-1479477 (December 30, 2014) Korean Registration No. 10-0801774 (January 30, 2008)

As a result of intensive research to solve the problems of the prior art accompanying the release paper and to develop a release paper having excellent smoothness, glossiness, and heat resistance, the present inventors have found that, as described below, a release paper manufactured using a dry laminating method using a urethane adhesive solution based on a PP or PET film can satisfy the necessary requirements and can provide high productivity, and have completed the present invention.

Accordingly, an object of the present invention is to provide a release paper using a dry laminating method based on a PP or PET film having excellent smoothness, gloss, and heat resistance, and a method for manufacturing the same, by supplementing the problems of non-uniform smoothness, low heat resistance, use of expensive raw materials, and environmental disadvantages pointed out as problems of the prior art.

The object of the present invention as described above, in one aspect

a silicone coating layer 10, a PP or PET film laminating layer 20, and a post layer 30; or a silicone coating layer 10, a PP or PET film laminating layer 20, a post layer 30, and a PP or PET film laminating layer 20;

The laminated structure is laminated by a dry laminating method in which an adhesive solution dissolved in a solvent is applied on a PP or PET film by gravure coating using a mesh roll, and then the solvent is volatilized with hot air in a chamber and then laminated with paper,

The dry lamination method uses a solvent-type two-component polyurethane adhesive for dry lamination and a release agent solution as an adhesive solution,

The main component of the two-component polyurethane adhesive includes 64 to 66 parts by weight of urethane resin (Cas No. 71839-69-5 liquid) and 34 to 36 parts by weight of ethyl acetate (Cas No. 141-78-6), the viscosity (mPas, 25 ℃) is 1500 to 3500, and the curing agent is aromatic polyisocyanate (cas no. 53317-61-6 ) 74.5 to 75.9 parts by weight, aromatic polyisocyanate (cas no. 26471-62-5) 0.1 to 0.5 parts by weight, and ethyl acetate (cas no. 141-78-6) 24 to 26 parts by weight, viscosity (mPas, 25 ℃) is 1500 to 3500,

The mixing ratio of the main agent and the curing agent is used at a mixing ratio of 5:1 by weight, and the solvent includes 400 to 420 parts by weight of ethyl acetate based on 100 parts by weight of the main agent.

The PP film or PET film dry laminating release paper according to the present invention compensates for the disadvantages of conventional PE release paper, that is, T-DIE laminating release paper, such as uneven smoothness, low heat resistance, use of expensive raw materials, and environmental disadvantages. It is an eco-friendly product that reduces the amount of plastic used by using a PP film or PET film with excellent physical properties and paper and dry laminating to reduce the amount of plastic used by reducing the coating thickness and uniform smoothness.

1 is a view explaining the layer structure of a release paper according to the present invention.
2 is a diagram explaining the layer structure of a release paper according to a further embodiment of the present invention.
3 is a manufacturing process diagram of the release paper according to the present invention.
4 is a view explaining an extrusion coating lamination process.

The present invention, in one aspect,

a silicone coating layer 10, a PP or PET film laminating layer 20, and a post layer 30; or a silicone coating layer 10, a PP or PET film laminating layer 20, a post layer 30, and a PP or PET film laminating layer 20;

The laminated structure is laminated by a dry laminating method in which an adhesive solution dissolved in a solvent is applied on a PP or PET film by gravure coating using a mesh roll, and then the solvent is volatilized with hot air in a chamber and then laminated with paper,

The dry lamination method uses a solvent-type two-component polyurethane adhesive for dry lamination and a release agent solution as an adhesive solution,

The main component of the two-component polyurethane adhesive includes 64 to 66 parts by weight of urethane resin (Cas No. 71839-69-5 liquid) and 34 to 36 parts by weight of ethyl acetate (Cas No. 141-78-6), the viscosity (mPas, 25 ℃) is 1500 to 3500, and the curing agent is aromatic polyisocyanate (cas no. 53317-61-6 ) 74.5 to 75.9 parts by weight, aromatic polyisocyanate (cas no. 26471-62-5) 0.1 to 0.5 parts by weight, and ethyl acetate (cas no. 141-78-6) 24 to 26 parts by weight, viscosity (mPas, 25 ℃) is 1500 to 3500,

The mixing ratio of the main agent and the curing agent is used at a mixing ratio of 5:1 by weight, and the solvent provides a release paper characterized in that 400 to 420 parts by weight of ethyl acetate is included based on 100 parts by weight of the main subject.

The present invention, in a further aspect,

The paper provides release paper, characterized in that white paper, transfer paper, glassine paper, green release paper, release paper, or kraft paper.

Hereinafter, the improved release paper according to the present invention and its manufacturing method will be described in more detail with reference to the accompanying drawings.

The terms or words used in the present specification and claims are not limited to conventional or dictionary meanings, and the inventors can appropriately define the concept of terms in order to explain their invention in the best way. Based on the principle, it should be interpreted as meanings and concepts consistent with the technical spirit of the present invention. Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention, it should be understood that there may be various equivalents and modifications that can replace them at the time of this application.

The present invention improves the problems associated with the release paper manufactured by the conventional extrusion lamination method, and by producing the release paper in a dry lamination method in which paper is laminated after applying an adhesive on a material such as PP (CPP, OPP), PET, etc., it has excellent workability even at a high temperature of 150 ° C or more and less deformation due to heat, so that the release paper can be manufactured with excellent smoothness and gloss, so the work speed can be improved, cost can be reduced, the surface is smooth, and even at high temperature There is no deformation, all materials can be used, and the working speed is 60 to 70 meters per minute, which increases productivity, increases waste paper content, and reduces plastic usage, providing eco-friendly release paper.

1 is a view explaining the layer structure of a release paper according to the present invention, Figure 2 is a view explaining the layer structure of a release paper according to a further embodiment of the present invention, Figure 3 is a manufacturing process diagram of the release paper according to the present invention, Figure 4 is a view explaining the extrusion coating lamination process.

The release paper of the present invention includes a silicone coating layer 10, a PP or PET film laminating layer 20, and a backing layer 30; Alternatively, the silicone coating layer 10, the PP or PET film laminating layer 20, the post layer 30, and the PP or PET film laminating layer 20; are sequentially laminated by a dry laminating method.

The silicone coating layer 10 is a silicone coating layer exclusively for PP or PET, and the release force can be controlled by changing the content, and is preferably formed to a thickness of 0.03 to 0.05 μm.

The PP or PET film laminating layer 20 may be formed to a thickness of 12 to 20 μm or more.

The post layer 30 can be any paper including white release paper and has a thickness of 80 to 120 μm.

The release paper of the present invention can also be formed as a double-sided PP or PET release paper, which can be formed with a structure of a silicone coating layer 10, a PP or PET film laminating layer 20, a post layer 30, and a PP or PET film laminating layer 20 as shown in FIG.

The manufacturing method of the release paper according to the present invention largely includes a film and paper laminating step, an aging step, a silicon coating step, an aging step, and a cutting and packaging step. Hereinafter, each step will be described in detail.

a) Film and paper laminating step

After applying the adhesive solution dissolved in the solvent on the PP or PET film to a certain thickness by gravure coating using a mesh roll, the solvent is volatilized with hot air in the chamber, and then the dry laminating method is performed, which is a method of laminating with paper.

The laminating step is a1) an unwinding process of unwinding PP and PET films at a speed of 100M or more per minute by hanging them on an unwinder; a2) gravure coating, a process of dissolving an adhesive in a solvent and coating it on a film with a constant thickness in a liquid state; a3) Drying process of volatilizing the solvent of the adhesive coated on the PP, PET film with hot air in the charm bar; a4) a step of laminating the dried film passing through the chamber with the paper of the second class paper (laminator); a5) a rewinding process of rewinding the paper laminated with the film to a rewinder; preferably including.

During gravure coating, liquid urethane adhesive is dissolved in solvent (EA) on the Sarah part of the coating head, and a certain amount of application (eg, 0.1g to 5g) is applied using a mesh roll of 80 to 120 mesh (mesh is defined as the number of small squares entering 1cm) in a liquid state.

In the dry lamination method, it may be preferable to use a solvent-type two-component polyurethane adhesive for dry lamination as an adhesive solution.

The main component of the two-component adhesive includes 64 to 66 parts by weight of urethane resin (Cas No. 71839-69-5 liquid phase) and 34 to 36 parts by weight of ethyl acetate (Cas No. 141-78-6), and has a viscosity (mPas, 25 ° C.) of 1500 to 3500. The subject may be commercially purchased and used as NEOFORCE™ KUB-360 (Sales Agency: Gangnam Hwaseong Co., Ltd.).

The curing agent includes 74.5 to 75.9 parts by weight of aromatic polyisocyanate (cas no. 53317-61-6), 0.1 to 0.5 parts by weight of aromatic polyisocyanate (cas no. 26471-62-5), and 24 to 26 parts by weight of ethyl acetate (cas no. 141-78-6), and has a viscosity (mPas, 25 ° C.) of 1500 to 3500 may be preferred.

The mixing ratio of the main agent and the curing agent may be preferably used in a mixing ratio of 5:1 by weight. As the solvent, 400 to 420 parts by weight of ethyl acetate may be used based on 100 parts by weight of the main material.

As the curing agent, NEOFORCE™ CL-100 (sales source: Gangnam Hwaseong Co., Ltd.) may be commercially purchased and used.

The adhesive has excellent adhesion to various substrates (OPP, PET, NYLON, PT, PS, AL foil, LLDPE, CPP, etc.) during dry lamination, and exhibits excellent performance in BOIL products due to its excellent initial adhesion and heat resistance. The composition of the adhesive complies with FDA 21CFR 175.105 regulations.

The release paper of the present invention is laminated with a urethane adhesive in a dry lamination method without using the conventional extrusion coating lamination method, and in the conventional T-die extrusion coating method using a resin, the coating operation is very difficult due to the mechanical properties of PP or PET. However, according to the present invention, the high smoothness and heat resistance of the film can be imparted to the release paper as it is by solidifying and laminating the urethane using the above resin composition including PP or PET.

b) ripening stage

The aging step is a step of volatilizing the residual solvent present in the adhesive that bonds the film and paper and inducing complete hardening at the same time, and is a process of curing the adhesive by aging for 45 to 50 hours in an aging room at 35 to 40 ° C. During this period, residual solvent volatilizes and the adhesive is fully cured.

c) silicone coating step

Then, using a silicone coating device, the film-laminated paper is unwound, and at the same time, a release agent (silicone release agent) solution dissolved in a solvent is coated using a gravure method using a mesh roll and a three-stage rubber roll. The silicone release agent is applied to a certain thickness by a method of transferring and coating.

The coating step may include: a1) an unwinding process of unwinding the paper laminated with the film at a speed of 100 M per minute or more by hanging it in an unwinder; a2) a step of dissolving a release agent in a solvent in a gravure coating and coating the laminated paper in a liquid state to a certain thickness; a3) a drying process in which the solvent of the release agent coated on the laminated paper is volatilized with hot air in a heat bar; a4) a rewinding step of rewinding the release agent (ie release paper) dried on the laminated paper to a rewinder; preferably including.

At this time, the liquid silicone adhesive is dissolved in a solvent (toluene) on the Sara portion of the coating head and applied in a liquid state to a certain thickness (eg, 0.03 to 0.05 μm) using a mesh roll of 180 to 200 mesh.

The release agent solution contains 30 to 40 parts by weight of silicone, 60 to 70 parts by weight of toluene, 0.3 to 1 part by weight of organosilane, 0.1 to 0.3 parts by weight of decamethylcyclopentasiloxane, 0.1 to 0.3 parts by weight of octamethylcyclotetrasiloxane, and 0.1 to 0.3 parts by weight of dodecamethylcyclohexasiloxane, or 30 to 40 parts by weight of silicone, 6 toluene. It is preferable to contain 0 to 70 parts by weight, 0.3 to 1 part by weight of organosilane, and 0.1 to 0.3 parts by weight of decamethylcyclopentasiloxane.

The release agent solution contains 30 to 40 parts by weight of silicone, 60 to 70 parts by weight of toluene (CAS No. 108-88-3), 0.3 to 1 part by weight of organosilane (CAS No. 17869-77-1), 0.1 to 0.3 parts by weight of decamethylcyclopentasiloxane (CAS No. 541-02-6), octamethylcyclotetrasiloxane (C AS No. 556-67-2) 0.1 to 0.3 parts by weight, and dodecamethylcyclohexasiloxane (CAS No. 540-97-6) 0.1 to 0.3 parts by weight, or silicon 30 to 40 parts by weight, toluene (CAS No. 108-88-3) 60 to 70 parts by weight, organosilane (CAS No. 17869-77-1) 0 .3 to 1 part by weight, and 0.1 to 0.3 parts by weight of deca methyl cyclopentasiloxane (CAS No. 541-02-6).

The silicone is preferably an addition reaction type silicone or curable silicone resin.

By using addition reaction type silicone as silicone, the release layer can be cured at a low temperature and in a short time compared to condensation type silicone. As the addition reaction type silicone, for example, a known polydimethylsiloxane having an alkenyl group (for example, a vinyl group, a hexenyl group, etc.) in the molecule can be used. As a specific example of addition reaction type silicone, materials, such as brand name X52-9201B, KS847, KS830 of Shin-Etsu Chemical Industry Co., Ltd., are mentioned.

As the silicone resin, you may use a commercially available composition containing a curable silicone resin. Examples of commercially available curable silicone mold release agents include KS-774, KS-775, KS-778, KS-779H, KS-847H, KS-856, X-62-2422 and X-62-2461 manufactured by Shin-Etsu Chemical Co., Ltd.; YSR-3022, TPR-6700, TPR-6720 and TPR-6721 manufactured by Toshiba Silicone; Toray Dow Corning LTC300B, LTC303E, LTC310, LTC314, SRX357, BY24-749, SD7333, BY24-179, BY24-840, BY24-842, BY24-850, SP7015, SP7259, SD7220, SD7226 and SD7229 ; DKQ3-202, DKQ3-203, DKQ3-204, DKQ3-205, and DKQ3-210 manufactured by Dow Corning Asia.

The resin preferably includes polypropylene (PP), polyethylene tereplate (PET) or a mixture thereof as a main component.

The PP film contains 10 times more sulfur and phosphorus components than LDPE and PET, which are substances that inhibit silicone curing.

Types of the PP film include an OPP film (biaxially stretched polypropylene) and a CPP film. The former is a secondary stretched film, that is, a film stretched in the longitudinal and transverse directions in the PP film manufacturing process. Antistatic agents and slimming agents are included, which can affect secondary processing (i.e., silicon treatment). The latter is a CPP film (non-stretched polypropylene), which is not stretched in the PP film manufacturing process, and has little effect on secondary processing because additives are not included in the manufacturing process.

It may be particularly desirable to apply the release paper according to the present invention to a glossy surface with a CPP film.

d) Silicon aging step

The aging step is a step of volatilizing the residual solvent present in the coated release agent and at the same time inducing complete hardening, and is a process of curing the release agent by aging for 24 hours in an aging room at 35 to 40 ° C. During this period, the residual solvent is volatilized and the release agent is completely cured.

e) Cutting and packaging steps

After aging, the release paper is cut into the required size using a cutter (slitter) and packed in a certain unit.

The release paper according to the present invention provides the following advantages and effects.

1. Compared to PE release paper, hardness (HARDNESS) is more than twice as high, and it is possible to slightly adjust the thickness. Example) Existing 18㎛ or more PE coated products can be used as 15㎛ PP products.

2. In addition, since PP has a higher heat resistance (MT) than PE by about 40 degrees, by increasing the processing conditions (chamber temperature, air pressure) in the silicon process and the post-process (adhesion process), the corresponding work speed is increased by more than 30% (on a monthly basis), thereby reducing manufacturing costs by increasing production volume. When the production volume is increased by 30% by high temperature and high speed operation, you can see the effect of saving about 12 Won per M, and you can see the effect of saving about 15 million Won by generating 650,000 Won when producing 1.3 million M with the existing manufacturing cost.

3. The smoothness of the PE release paper is a product that is greatly affected by the paper and shows a lot of difference depending on the paper surface, while the release paper of the present invention maintains a constant smoothness without affecting the paper and has a smoothness more than three times that of the PE release paper.

4. PE-based release paper has mainly used release paper due to the large effect on the paper, that is, the surface of the paper, but the release paper of the present invention is a product that does not affect the paper and can be used for all papers. As a result, it is possible to purchase low-cost paper with a wide selection of raw materials, which can lead to cost reduction, can be applied to release papers of all papers other than basic release papers, and can also replace some PET release papers, so the range of application is wide.

In the conventional method of using paper for release paper or paper with high pulp content, the high physical properties of PP and PET films have little effect on paper, so all paper with high recycled pulp content or poor paper surface quality can be used.

5. Conventional PE release paper is produced with 100% pulp content, and the release paper of the present invention is an eco-friendly product because it can be produced with paper-containing products such as eco-friendly white paper or recycled kraft paper.

6. The release paper of the present invention is superior in gloss compared to the conventional PE release paper, so it can be applied to high-end products.

Example

Hereinafter, the present invention will be described in more detail with reference to examples. However, these embodiments are intended to explain the present invention with specific examples, and are not intended to limit the present invention thereby.

Example 1: Preparation of PP release paper

An adhesive solution dissolved in a solvent was applied using a 120 mesh roll to a certain thickness using a gravure coating method on PP and PET films that were unwound using a dry lamination machine, and the solvent was volatilized with hot air in a charm bar, and the dried film was laminated with paper.

After aging the paper laminated with the film at a certain temperature in an aging room for a certain period of time, the release agent (i.e., silicone) dissolved in the solvent is coated with silicon to a certain thickness using a mesh roll or a three-stage rubber roll using a silicone coating machine, and the silicone-coated paper is passed through a duct to evaporate the solvent with hot air below 100 ° C. PP release paper having a thickness of 3 to 0.05 μm, a PP coating layer of 20 μm, and a paper thickness of 83 μm was prepared. The composition of the adhesive solution contained 64 to 66 parts by weight of urethane resin (liquid) and 34 to 36 parts by weight of ethyl acetate.

Example 2: Preparation of PP release paper

PP release paper was prepared in the same manner as in Example 1, but the release agent solution contained 30 to 40 parts by weight of silicone, 60 to 70 parts by weight of toluene (CAS No. 108-88-3), 0.3 to 1 part by weight of organosilane (CAS No. 17869-77-1), and 0.1 to 0.3 parts by weight of decamethylcyclopentasiloxane (CAS No. 541-02-6). Part by weight, one containing 0.1 to 0.3 parts by weight of octamethylcyclotetrasiloxane (CAS No. 556-67-2) and 0.1 to 0.3 parts by weight of dodecamethylcyclohexasiloxane (CAS No. 540-97-6) was used.

Comparative Example 1

PE release paper having a thickness of 1 to 1.4 μm, a PE coating layer of 25 μm, and a paper of 122 μm was prepared using an extrusion T-die lamination method using PE resin.

Test Example 1: DSC analysis

In the manufacturing process of the products of Example 1 and Comparative Example 1, the temperature was measured using a differential scanning calorimeter (DSC), and the results are shown in Table 1 below.

Example 1 Comparative Example 1 temperature 163℃ 104℃, 125℃

From the results of Table 1, the PP-based resin of the present invention has a heat resistance of 160 degrees or more.

, but the PE series was confirmed as LDPE 104 and HDPE 125 degrees.

Test Example 2: Comparison of smoothness

The smoothness of the products of Example 1 and Comparative Example 1 was compared, and the results are shown in Table 2 below.

Example 1 Comparative Example 1 smoothness 4100 1400 heat resistance 160℃ 110℃ basis weight 88 98 Total thickness (㎛) 110 120

From the results of Table 2, the release paper according to the embodiment of the present invention showed a smoothness of at least three times.

Test Example 3: Yield Comparison

The workability of the products of Example 1 and Comparative Example 1 was compared, and the results are shown in Table 3 below.

Example 1 comparative example Monthly production 1.3 million M 1 million M monthly manufacturing cost 50 million won 50 million won M/unit price 38 won 50 won

From the results of Table 3, it was confirmed that the manufacturing cost was remarkably reduced when manufactured by the method of the present invention.

As such, the present invention has been described with examples of preferred embodiments of the present invention through drawings and specifications, but it is obvious that various modifications and equivalent implementations are possible for those skilled in the art.

10: silicone coating layer
20: PP, PET layer
30: Fuji layer

Claims (4)

a silicone coating layer 10, a PP or PET film laminating layer 20, and a post layer 30; or a silicone coating layer 10, a PP or PET film laminating layer 20, a post layer 30, and a PP or PET film laminating layer 20;
The laminated structure is laminated by a dry laminating method in which an adhesive solution dissolved in a solvent is applied on a PP or PET film by gravure coating using a mesh roll, and then the solvent is volatilized with hot air in a chamber and then laminated with paper,
The dry lamination method uses a solvent-type two-component polyurethane adhesive for dry lamination and a release agent solution as an adhesive solution,
The main component of the two-component polyurethane adhesive includes 64 to 66 parts by weight of urethane resin (Cas No. 71839-69-5 liquid) and 34 to 36 parts by weight of ethyl acetate (Cas No. 141-78-6), the viscosity (mPas, 25 ℃) is 1500 to 3500, and the curing agent is aromatic polyisocyanate (cas no. 53317-61-6 ) 74.5 to 75.9 parts by weight, aromatic polyisocyanate (cas no. 26471-62-5) 0.1 to 0.5 parts by weight, and ethyl acetate (cas no. 141-78-6) 24 to 26 parts by weight, viscosity (mPas, 25 ℃) is 1500 to 3500,
The mixing ratio of the main agent and the curing agent is used at a mixing ratio of 5:1 by weight, and the solvent includes 400 to 420 parts by weight of ethyl acetate based on 100 parts by weight of the main subject. The method of claim 1,
The release paper, characterized in that the paper of the post layer 30 is white paper, transfer paper, glassine paper, green release paper, release paper, or kraft paper. The method of claim 1,
The release agent solution contains 30 to 40 parts by weight of silicone, 60 to 70 parts by weight of toluene, 0.3 to 1 part by weight of organosilane, 0.1 to 0.3 parts by weight of decamethylcyclopentasiloxane, 0.1 to 0.3 parts by weight of octamethylcyclotetrasiloxane, and 0.1 to 0.3 parts by weight of dodecamethylcyclohexasiloxane, or 30 to 40 parts by weight of silicone, 6 toluene. 0 to 70 parts by weight, 0.3 to 1 part by weight of organosilane, and 0.1 to 0.3 parts by weight of decamethylcyclopentasiloxane. The method of claim 3,
The release paper, characterized in that the silicone is an addition reaction type silicone or curable silicone resin.