Release paper for adhesive tape and preparation method thereof
阅读说明：本技术 一种胶带用防粘纸及其制备方法 (Release paper for adhesive tape and preparation method thereof ) 是由 廖平湘 于 2020-12-24 设计创作，主要内容包括：本发明公开了一种胶带用防粘纸及其制备方法,胶带用防粘纸包括基材、淋膜层、防粘剂层、薄膜层、雾面涂层和离型剂涂层；雾面涂层按照重量份的原料包括：纳米二氧化硅粉体、纳米氧化铝粉体、硅烷偶联剂、乙烯基硅氧烷、含氢硅氧烷、溶剂、铂金、引发剂；离型剂涂层按照重量份的原料包括：氨基硅油、交联剂、含铬有机络合物、活性稀释剂、抗氧化剂、光引发剂、高粘度甲基硅油、甲基戊炔醇、偶氮化合物发泡剂。本发明的凹缺处没有涂上防粘剂,从而降低了硅油的使用量,减少了有机溶剂用量,而且生产出来的防粘纸防粘性能好,不仅降低了生产成本,而且符合环保节能要求,具有极大的发展潜力和市场需求。(The invention discloses release paper for an adhesive tape and a preparation method thereof, wherein the release paper for the adhesive tape comprises a base material, a film coating layer, an anti-sticking agent layer, a film layer, a matte coating and a release agent coating; the matte coating comprises the following raw materials in parts by weight: nano silicon dioxide powder, nano aluminum oxide powder, a silane coupling agent, vinyl siloxane, hydrogen-containing siloxane, a solvent, platinum and an initiator; the release agent coating comprises the following raw materials in parts by weight: amino silicone oil, a cross-linking agent, a chromium-containing organic complex, a reactive diluent, an antioxidant, a photoinitiator, high-viscosity methyl silicone oil, methyl pentynol and an azo compound foaming agent. The anti-sticking agent is not coated on the concave part, so that the using amount of silicone oil is reduced, the using amount of an organic solvent is reduced, the produced anti-sticking paper has good anti-sticking performance, the production cost is reduced, the environment-friendly and energy-saving requirements are met, and the anti-sticking paper has great development potential and market requirements.)
1. The release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, and is characterized in that the film coating layer and the release agent layer are respectively positioned on the surfaces of two sides of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 30-40 parts of polyethylene, 5-10 parts of modified polyolefin, 3-5 parts of stabilizer and 0.5-1 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.1-0.3 part of nano silicon dioxide powder, 0.2-0.4 part of nano aluminum oxide powder, 8-12 parts of silane coupling agent, 30-50 parts of vinyl siloxane, 2-4 parts of hydrogen-containing siloxane, 80-90 parts of solvent, 0.1-0.2 part of platinum and 0.5-1 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 40-60 parts of amino silicone oil, 3-5 parts of cross-linking agent, 10-20 parts of chromium-containing organic complex, 5-7 parts of reactive diluent, 0.4-0.6 part of antioxidant, 3-5 parts of photoinitiator, 3-5 parts of high-viscosity methyl silicone oil, 1-3 parts of methyl pentynol and 20-30 parts of azo compound foaming agent.
2. The release paper for adhesive tapes according to claim 1, wherein the laminating layer comprises the following raw materials in parts by weight: 32-38 parts of polyethylene, 6-9 parts of modified polyolefin, 3.5-4.5 parts of stabilizer and 0.6-0.9 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.15-0.25 part of nano silicon dioxide powder, 0.25-0.35 part of nano alumina powder, 9-11 parts of silane coupling agent, 35-45 parts of vinyl siloxane, 2.5-3.5 parts of hydrogen-containing siloxane, 82-88 parts of solvent, 0.12-0.18 part of platinum and 0.6-0.9 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 45-55 parts of amino silicone oil, 3.5-4.5 parts of cross-linking agent, 12-18 parts of chromium-containing organic complex, 5.5-6.5 parts of reactive diluent, 0.45-0.55 part of antioxidant, 3.5-4.5 parts of photoinitiator, 3.5-4.5 parts of high-viscosity methyl silicone oil, 1.5-2.5 parts of methyl pentynol and 22-28 parts of azo compound foaming agent.
3. The release paper for adhesive tapes according to claim 1, wherein the laminating layer comprises the following raw materials in parts by weight: 35 parts of polyethylene, 8 parts of modified polyolefin, 4 parts of stabilizer and 0.8 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.2 part of nano silicon dioxide powder, 0.3 part of nano aluminum oxide powder, 10 parts of silane coupling agent, 40 parts of vinyl siloxane, 3 parts of hydrogen-containing siloxane, 85 parts of solvent, 0.15 part of platinum and 0.8 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 50 parts of amino silicone oil, 4 parts of cross-linking agent, 15 parts of chromium-containing organic complex, 6 parts of reactive diluent, 0.5 part of antioxidant, 4 parts of photoinitiator, 4 parts of high-viscosity methyl silicone oil, 2 parts of methyl pentynol and 25 parts of azo compound foaming agent.
4. The release paper for adhesive tapes according to any one of claims 1 to 3, wherein the modified polyolefin is acrylic modified polyethylene or polypropylene.
5. The release paper for adhesive tape according to any one of claims 1 to 3, wherein the stabilizer is at least one of agar, gelatin and soluble starch.
6. The release paper for adhesive tape according to any one of claims 1 to 3, wherein the plasticizer is at least one of glycerin, ethylene glycol, sorbitol and glycerin.
7. The release paper for adhesive tape according to any one of claims 1 to 3, wherein the crosslinking agent is a hydroxyl polysiloxane.
8. A method for preparing the release paper for adhesive tape according to any one of claims 1 to 3, which comprises the following steps:
(1) weighing the raw materials in parts by weight;
(2) treating the surface of the base paper for 1-3min by a corona treatment machine at the power of 400-450W;
(3) uniformly mixing polyethylene, modified polyolefin, a stabilizer and a plasticizer, heating and bridging at the temperature of 150-250 ℃, then increasing the temperature to 340 ℃ for melting, then applying the pressure of 10-20Mpa to extrude the mixture, and laminating the film on the base material subjected to corona pretreatment, wherein the laminating amount is 8-12g/m2Keeping the temperature at 300-340 ℃ during film coating, and cooling to obtain the coated paper;
(4) coating an adhesive layer on the surface of the other side of the base material, and attaching a thin film layer to the surface of the adhesive layer;
(5) coating a matte coating with the thickness of 1-2 mu m on the surface of the film layer to obtain matte coated paper;
(6) rolling the matte coated paper by a roller with concave-convex embossings, wherein the width of a convex surface is 8mm, the height of a concave-convex groove is 1-1.4mm, and the width of the bottom surface of the groove is 10-14mm, so that the surface of the matte coated paper presents concave-convex embossed grooves;
(7) and uniformly coating the release agent on the embossed convex surface on the surface of the laminating paper by adopting a coating machine, drying at the temperature of 150-170 ℃, and cooling to obtain the release paper.
Technical Field
The invention relates to the technical field of release materials, in particular to release paper for an adhesive tape and a preparation method thereof.
Background
The release paper is mainly pasted on the gluing surface of the adhesive tape and used for protecting the adhesive layer on the surface of the adhesive tape. The release paper is composed of base paper, an isolation layer and a release layer, and the preparation process comprises the steps of coating a layer of isolation agent (the adopted isolation agent mainly comprises polyethylene) on the whole surface of the base paper, and then coating a layer of release agent (the adopted release agent mainly comprises silicone oil) on the surface of the coating layer to obtain the release paper.
In the existing production process of release paper, because the whole surface of the base paper is coated with a layer of silicone oil with the anti-sticking effect, the raw material price of the silicone oil is high, the production cost is increased, most of the silicone oil is diluted by organic solvents, the organic solvents are volatile and difficult to completely recycle, and the production process is toxic and is not beneficial to environmental protection.
Disclosure of Invention
The invention aims to provide release paper for an adhesive tape and a preparation method thereof, which are low in cost and short in production period and are used for solving the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, wherein the film coating layer and the release agent layer are respectively positioned on the two side surfaces of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 30-40 parts of polyethylene, 5-10 parts of modified polyolefin, 3-5 parts of stabilizer and 0.5-1 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.1-0.3 part of nano silicon dioxide powder, 0.2-0.4 part of nano aluminum oxide powder, 8-12 parts of silane coupling agent, 30-50 parts of vinyl siloxane, 2-4 parts of hydrogen-containing siloxane, 80-90 parts of solvent, 0.1-0.2 part of platinum and 0.5-1 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 40-60 parts of amino silicone oil, 3-5 parts of cross-linking agent, 10-20 parts of chromium-containing organic complex, 5-7 parts of reactive diluent, 0.4-0.6 part of antioxidant, 3-5 parts of photoinitiator, 3-5 parts of high-viscosity methyl silicone oil, 1-3 parts of methyl pentynol and 20-30 parts of azo compound foaming agent.
As a further scheme of the invention: the drench membrane layer comprises the following raw materials in parts by weight: 32-38 parts of polyethylene, 6-9 parts of modified polyolefin, 3.5-4.5 parts of stabilizer and 0.6-0.9 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.15-0.25 part of nano silicon dioxide powder, 0.25-0.35 part of nano alumina powder, 9-11 parts of silane coupling agent, 35-45 parts of vinyl siloxane, 2.5-3.5 parts of hydrogen-containing siloxane, 82-88 parts of solvent, 0.12-0.18 part of platinum and 0.6-0.9 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 45-55 parts of amino silicone oil, 3.5-4.5 parts of cross-linking agent, 12-18 parts of chromium-containing organic complex, 5.5-6.5 parts of reactive diluent, 0.45-0.55 part of antioxidant, 3.5-4.5 parts of photoinitiator, 3.5-4.5 parts of high-viscosity methyl silicone oil, 1.5-2.5 parts of methyl pentynol and 22-28 parts of azo compound foaming agent.
As a further scheme of the invention: the drench membrane layer comprises the following raw materials in parts by weight: 35 parts of polyethylene, 8 parts of modified polyolefin, 4 parts of stabilizer and 0.8 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.2 part of nano silicon dioxide powder, 0.3 part of nano aluminum oxide powder, 10 parts of silane coupling agent, 40 parts of vinyl siloxane, 3 parts of hydrogen-containing siloxane, 85 parts of solvent, 0.15 part of platinum and 0.8 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 50 parts of amino silicone oil, 4 parts of cross-linking agent, 15 parts of chromium-containing organic complex, 6 parts of reactive diluent, 0.5 part of antioxidant, 4 parts of photoinitiator, 4 parts of high-viscosity methyl silicone oil, 2 parts of methyl pentynol and 25 parts of azo compound foaming agent.
As a further scheme of the invention: the modified polyolefin is acrylic acid modified polyethylene or polypropylene.
As a further scheme of the invention: the stabilizer is at least one of agar, gelatin and soluble starch.
As a further scheme of the invention: the plasticizer is at least one of glycerol, glycol, sorbitol and glycerol.
As a still further scheme of the invention: the cross-linking agent is hydroxyl polysiloxane.
The preparation method of the release paper for the adhesive tape comprises the following specific steps:
(1) weighing the raw materials in parts by weight;
(2) treating the surface of the base paper for 1-3min by a corona treatment machine at the power of 400-450W;
(3) uniformly mixing polyethylene, modified polyolefin, a stabilizer and a plasticizer, heating and bridging at the temperature of 150-250 ℃, then increasing the temperature to 340 ℃ for melting, then applying the pressure of 10-20Mpa to extrude the mixture, and laminating the film on the base material subjected to corona pretreatment, wherein the laminating amount is 8-12g/m2Keeping the temperature at 300-340 ℃ during film coating, and cooling to obtain the coated paper;
(4) coating an adhesive layer on the surface of the other side of the base material, and attaching a thin film layer to the surface of the adhesive layer;
(5) coating a matte coating with the thickness of 1-2 mu m on the surface of the film layer to obtain matte coated paper;
(6) rolling the matte coated paper by a roller with concave-convex embossings, wherein the width of a convex surface is 8mm, the height of a concave-convex groove is 1-1.4mm, and the width of the bottom surface of the groove is 10-14mm, so that the surface of the matte coated paper presents concave-convex embossed grooves;
(7) and uniformly coating the release agent on the embossed convex surface on the surface of the laminating paper by adopting a coating machine, drying at the temperature of 150-170 ℃, and cooling to obtain the release paper.
Compared with the prior art, the invention has the beneficial effects that:
the surface of the treated polyester matte coating has a plurality of uniform concave-convex structures, then the surface is coated with the release agent coating, the bottom surface of the release agent coating infiltrates into the notches on the surface of the polyester matte coating in a liquid state, and the release agent coating is fixedly connected with the polyester matte coating through the notches after being solidified, so that the bonding force is firmer and more reliable; in addition, the concave part is not coated with an anti-sticking agent, so that the using amount of silicone oil is reduced, the using amount of an organic solvent is reduced, the anti-sticking performance of the produced anti-sticking paper is good, the production cost is reduced, the requirements of environmental protection and energy conservation are met, and the anti-sticking paper has great development potential and market demand.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Example 1
The release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, wherein the film coating layer and the release agent layer are respectively positioned on the two side surfaces of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 30 parts of polyethylene, 5 parts of modified polyolefin, 3 parts of stabilizer and 0.5 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.1 part of nano silicon dioxide powder, 0.2 part of nano aluminum oxide powder, 8 parts of silane coupling agent, 30 parts of vinyl siloxane, 2 parts of hydrogen-containing siloxane, 80 parts of solvent, 0.1 part of platinum and 0.5 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 40 parts of amino silicone oil, 3 parts of cross-linking agent, 10 parts of chromium-containing organic complex, 5 parts of reactive diluent, 0.4 part of antioxidant, 3 parts of photoinitiator, 3 parts of high-viscosity methyl silicone oil, 1 part of methyl pentynol and 20 parts of azo compound foaming agent.
The preparation method of the release paper for the adhesive tape comprises the following specific steps:
(1) weighing the raw materials in parts by weight;
(2) treating the surface of the base paper for 1min at the power of 400W by adopting a corona treatment machine;
(3) uniformly mixing polyethylene, modified polyolefin, a stabilizer and a plasticizer, heating and bridging at the temperature of 150 ℃, then increasing the temperature to 300 ℃, melting, then applying the pressure of 10Mpa to extrude the mixture, and laminating the mixture on a base material subjected to corona pretreatment, wherein the laminating amount is 8g/m2Keeping the temperature at 300 ℃ during film coating, and cooling to obtain coated paper;
(4) coating an adhesive layer on the surface of the other side of the base material, and attaching a thin film layer to the surface of the adhesive layer;
(5) coating a matte coating with the thickness of 1 mu m on the surface of the film layer to obtain matte coated paper;
(6) rolling the matte coated paper by a roller with concave-convex embossings, wherein the width of a convex surface is 8mm, the height of a concave-convex groove is 1mm, and the width of the bottom surface of the groove is 10mm, so that the surface of the matte coated paper presents concave-convex embossed grooves;
(7) and uniformly coating the release agent on the embossed convex surface on the surface of the laminating paper by adopting a coating machine, drying at the temperature of 150 ℃, and cooling to obtain the release paper.
Example 2
The release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, wherein the film coating layer and the release agent layer are respectively positioned on the two side surfaces of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 32 parts of polyethylene, 6 parts of modified polyolefin, 3.5 parts of stabilizer and 0.6 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.15 part of nano silicon dioxide powder, 0.25 part of nano alumina powder, 9 parts of silane coupling agent, 35 parts of vinyl siloxane, 2.5 parts of hydrogen-containing siloxane, 82 parts of solvent, 0.12 part of platinum and 0.6 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 45 parts of amino silicone oil, 3.5 parts of cross-linking agent, 12 parts of chromium-containing organic complex, 5.5 parts of reactive diluent, 0.45 part of antioxidant, 3.5 parts of photoinitiator, 3.5 parts of high-viscosity methyl silicone oil, 1.5 parts of methyl pentynol and 22 parts of azo compound foaming agent.
The preparation method of the release paper for the adhesive tape comprises the following specific steps:
(1) weighing the raw materials in parts by weight;
(2) treating the surface of the base paper for 2min at a power of 420W by adopting a corona treatment machine;
(3) mixing polyethylene, modified polyolefin, stabilizer and plasticizer uniformly, and passing through temperatureHeating to 200 deg.C for bridging, heating to 320 deg.C, melting, extruding under 15Mpa, and laminating to the base material subjected to corona pretreatment with a lamination amount of 10g/m2Keeping the temperature at 320 ℃ during film coating, and cooling to obtain film coated paper;
(4) coating an adhesive layer on the surface of the other side of the base material, and attaching a thin film layer to the surface of the adhesive layer;
(5) coating a matte coating with the thickness of 1.5 mu m on the surface of the film layer to obtain matte coated paper;
(6) rolling the matte coated paper by a roller with concave-convex embossings, wherein the width of a convex surface is 8mm, the height of a concave-convex groove is 1.2mm, and the width of the bottom surface of a groove is 12mm, so that the surface of the matte coated paper presents concave-convex embossings;
(7) and uniformly coating the release agent on the embossed convex surface on the surface of the laminating paper by adopting a coating machine, drying at the temperature of 160 ℃, and cooling to obtain the release paper.
Example 3
The release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, wherein the film coating layer and the release agent layer are respectively positioned on the two side surfaces of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 35 parts of polyethylene, 8 parts of modified polyolefin, 4 parts of stabilizer and 0.8 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.2 part of nano silicon dioxide powder, 0.3 part of nano aluminum oxide powder, 10 parts of silane coupling agent, 40 parts of vinyl siloxane, 3 parts of hydrogen-containing siloxane, 85 parts of solvent, 0.15 part of platinum and 0.8 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 50 parts of amino silicone oil, 4 parts of cross-linking agent, 15 parts of chromium-containing organic complex, 6 parts of reactive diluent, 0.5 part of antioxidant, 4 parts of photoinitiator, 4 parts of high-viscosity methyl silicone oil, 2 parts of methyl pentynol and 25 parts of azo compound foaming agent.
The preparation method of the release paper for the adhesive tape comprises the following specific steps:
(1) weighing the raw materials in parts by weight;
(2) treating the surface of the base paper for 3min by a corona treatment machine at the power of 450W;
(3) uniformly mixing polyethylene, modified polyolefin, a stabilizer and a plasticizer, heating and bridging at the temperature of 250 ℃, then increasing the temperature to 340 ℃, melting, then applying the pressure of 20Mpa to extrude the mixture, and laminating the mixture on a base material subjected to corona pretreatment, wherein the laminating amount is 12g/m2Keeping the temperature at 340 ℃ during film coating, and cooling to obtain coated paper;
(4) coating an adhesive layer on the surface of the other side of the base material, and attaching a thin film layer to the surface of the adhesive layer;
(5) coating a matte coating with the thickness of 2 mu m on the surface of the film layer to obtain matte coated paper;
(6) rolling the matte coated paper by a roller with concave-convex embossings, wherein the width of a convex surface is 8mm, the height of a concave-convex groove is 1.4mm, and the width of the bottom surface of a groove is 14mm, so that the surface of the matte coated paper presents concave-convex embossings;
(7) and uniformly coating the release agent on the embossed convex surface on the surface of the laminating paper by using a coating machine, drying at the temperature of 170 ℃, and cooling to obtain the release paper.
Example 4
The release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, wherein the film coating layer and the release agent layer are respectively positioned on the two side surfaces of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 38 parts of polyethylene, 9 parts of modified polyolefin, 4.5 parts of stabilizer and 0.9 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.25 part of nano silicon dioxide powder, 0.35 part of nano alumina powder, 11 parts of silane coupling agent, 45 parts of vinyl siloxane, 3.5 parts of hydrogen-containing siloxane, 88 parts of solvent, 0.18 part of platinum and 0.9 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 55 parts of amino silicone oil, 4.5 parts of cross-linking agent, 18 parts of chromium-containing organic complex, 6.5 parts of reactive diluent, 0.55 part of antioxidant, 4.5 parts of photoinitiator, 4.5 parts of high-viscosity methyl silicone oil, 2.5 parts of methyl pentynol and 28 parts of azo compound foaming agent.
The release paper for adhesive tape was prepared in the same manner as in example 2.
Example 5
The release paper for the adhesive tape comprises a base material, a film coating layer, a release agent layer, a film layer, a matte coating and a release agent coating, wherein the film coating layer and the release agent layer are respectively positioned on the two side surfaces of the base material, and the film layer, the matte coating and the release agent coating are sequentially coated on the release agent layer; the drench membrane layer comprises the following raw materials in parts by weight: 40 parts of polyethylene, 10 parts of modified polyolefin, 5 parts of stabilizer and 1 part of plasticizer; the matte coating comprises the following raw materials in parts by weight: 0.3 part of nano silicon dioxide powder, 0.4 part of nano aluminum oxide powder, 12 parts of silane coupling agent, 50 parts of vinyl siloxane, 4 parts of hydrogen-containing siloxane, 90 parts of solvent, 0.2 part of platinum and 1 part of initiator; the release agent coating comprises the following raw materials in parts by weight: 60 parts of amino silicone oil, 5 parts of cross-linking agent, 20 parts of chromium-containing organic complex, 7 parts of reactive diluent, 0.6 part of antioxidant, 5 parts of photoinitiator, 5 parts of high-viscosity methyl silicone oil, 3 parts of methyl pentynol and 30 parts of azo compound foaming agent.
The release paper for adhesive tape was prepared in the same manner as in example 2.
The modified polyolefin is acrylic acid modified polyethylene or polypropylene; the stabilizer is at least one of agar, gelatin and soluble starch; the plasticizer is at least one of glycerol, glycol, sorbitol and glycerol; the cross-linking agent is hydroxyl polysiloxane.
The surface of the treated polyester matte coating has a plurality of uniform concave-convex structures, then the surface is coated with the release agent coating, the bottom surface of the release agent coating infiltrates into the notches on the surface of the polyester matte coating in a liquid state, and the release agent coating is fixedly connected with the polyester matte coating through the notches after being solidified, so that the bonding force is firmer and more reliable; in addition, the concave part is not coated with an anti-sticking agent, so that the using amount of silicone oil is reduced, the using amount of an organic solvent is reduced, the anti-sticking performance of the produced anti-sticking paper is good, the production cost is reduced, the requirements of environmental protection and energy conservation are met, and the anti-sticking paper has great development potential and market demand.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.