High-temperature-resistant paper release film

Abstract

The utility model discloses a high-temperature-resistant paper release film. The release film sequentially comprises a release layer, a high-temperature-resistant deformation layer, a filling layer, an anti-curling layer and an exhaust layer from top to bottom, wherein the release layer is used for releasing and resisting expansion and shrinkage; the high-temperature-resistant deformation layer is used for shaping and resisting high temperature; the release layer is a silicone oil coating layer, the anti-curling layer is a modified polypropylene layer, and the exhaust layer is a coated paper layer. The polyethylene layer and the modified polypropylene layer are added, so that the reject ratio of products is reduced, the production efficiency is improved, and the adaptability of raw materials is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of release films, in particular to a high-temperature resistant paper release film. Background Art

[0002] Release film, also known as peeling film, isolation film, or separation film, is typically coated with fluorine or a silicone release agent to enhance the release force of plastic films, such as PET, PE, and OPP. This allows for extremely light and stable release force against various organic pressure-sensitive adhesives. Depending on the desired release force of the release film and the viscosity of the adhesive used, the release force is adjusted accordingly, achieving an extremely light and stable release force during peeling.

[0003] In recent years, with the growing demand for electronic and electrical products, the application scope of flexible circuit boards has gradually expanded. In the existing technology, release films are used in the production process of flexible circuit boards. However, the release films currently used still have many shortcomings. Low-cost release films have poor heat resistance, are inconvenient to use, have unstable expansion and contraction, and have no buffering and filling effects. High-end release films have high production costs, and the raw materials are monopolized by foreign countries, and have poor thermal tension resistance. Summary of the Invention

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0005] A high-temperature resistant paper release film, the release film comprises, from top to bottom, a release layer for release and anti-expansion and shrinkage, a high-temperature deformation-resistant layer for shaping and high-temperature resistance, a filling layer for buffering and filling, an anti-curling layer for anti-curling, and a venting layer for anti-tension and venting; the release layer is a silicone oil coating layer, the filling layer is a polyethylene layer, the anti-curling layer is a modified polypropylene layer, and the venting layer is a coated paper layer.

[0006] Furthermore, the high temperature deformation resistant layer is a PET layer, a PBT layer, a nylon layer or a BOPP layer.

[0007] Furthermore, the release layer is a silicone oil coating with a dosage of 0.3 to 1.5 g / m 2 release layer.

[0008] Furthermore, the thickness of the high temperature deformation resistant layer is 0.005 to 0.04 mm.

[0009] Furthermore, the filling layer is a polyethylene coating with a dosage of 10 to 100 g / m 2 polyethylene layer.

[0010] Furthermore, the anti-curling layer is a modified polypropylene coating with a dosage of 3 to 7 g / m 2 modified polypropylene layer.

[0011] Furthermore, the release layer is a silicone oil coating layer or a non-silicone coating layer.

[0012] Beneficial effects of the utility model:

[0013] The utility model adds a polyethylene layer and a modified polypropylene layer, reduces the product defect rate, improves production efficiency, and improves the adaptability of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 Schematic diagram of the layered structure of the release film;

[0016] Description of reference numerals:

[0017] 1. Release layer; 2. High temperature deformation resistant layer; 3. Filling layer; 4. Anti-curling layer; 5. Venting layer. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention. Specific embodiment 1:

[0020] A high temperature resistant paper release film, the release film is sequentially composed of a release layer 1 for release and anti-expansion and shrinkage from top to bottom, specifically, the release layer 1 is a silicone oil coating with a dosage of 0.3 to 1.5 g / m 2 The release layer can also be a non-silicone release layer in other embodiments, a high temperature deformation resistant layer 2 for shaping high temperature resistance, specifically, the high temperature deformation resistant layer 2 has a thickness of 0.005 to 0.04 mm, and a filling layer 3 for buffer filling, specifically, the filling layer 3 is a polyethylene content of 10 to 100 g / m 2 The polyethylene layer, the anti-curling layer 4 for preventing curling, specifically, the anti-curling layer 4 is a modified polypropylene with an amount of 3 to 7 g / m 2 modified polypropylene layer, and a venting layer 5 for resisting tension venting; the release layer 1 is a silicone oil coating layer. In this embodiment, the high-temperature deformation-resistant layer 2 is PET, and other embodiments can also be PBT, BOPP or nylon. The filling layer 3 is a polyethylene layer, the anti-curling layer 4 is a modified polypropylene layer, and the venting layer 5 is a coated paper layer.

[0021] The production steps are as follows:

[0022] Step 1: Place the coated paper layer, which is the base layer;

[0023] Step 2: Place modified polypropylene and polyethylene into a multi-layer co-extrusion cast film machine. The amount of modified polypropylene is 3-7 g / m 2 , the amount of polyethylene is 15~30g / m 2 ;

[0024] Step 3: Use a multi-layer co-extrusion casting machine to coat the coated paper layer;

[0025] Step 4: Compound high temperature deformation resistant layer while laminating;

[0026] Step 5: Use a coating machine to apply release agent on the high temperature deformation resistant layer, with a dosage of 0.3-0.7g / m 2 .

[0027] The above description is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A high temperature resistant paper release film, characterized in that: The release film comprises, from top to bottom, a release layer (1) for release and anti-expansion and shrinkage, a high-temperature deformation-resistant layer (2) for shaping and high-temperature resistance, a filling layer (3) for buffer filling, an anti-curling layer (4) for anti-curling, and a venting layer (5) for anti-tension venting; the filling layer (3) is a polyethylene layer, the anti-curling layer (4) is a modified polypropylene layer, and the venting layer (5) is a coated paper layer.

2. The high temperature resistant paper release film according to claim 1, characterized in that: The high temperature deformation resistant layer (2) is a PET layer, a PBT layer, a nylon layer or a BOPP layer.

3. The high temperature resistant paper release film according to claim 1, characterized in that: The release layer (1) is a silicone oil coating with a dosage of 0.3 to 1.5 g / m 2 release layer.

4. The high temperature resistant paper release film according to claim 1, characterized in that: The thickness of the high temperature deformation resistant layer (2) is 0.005-0.04 mm.

5. The high temperature resistant paper release film according to claim 1, characterized in that: The filling layer (3) is a polyethylene coating with a dosage of 10 to 100 g / m 2 polyethylene layer.

6. The high temperature resistant paper release film according to claim 1, characterized in that: The anti-curling layer (4) is a modified polypropylene coating with a dosage of 3 to 7 g / m 2 modified polypropylene layer.

7. The high temperature resistant paper release film according to claim 1, characterized in that: The release layer (1) is a silicone oil coating layer or a non-silicon coating layer.

Images