High tenacity clean release paper

Abstract

The utility model belongs to the release material technical field, concretely is a kind of high tenacity clean release paper, including: substrate layer, tenacity reinforcing layer being compounded on the upper surface of substrate layer, surface treatment layer being coated on the upper surface of tenacity reinforcing layer and release agent layer being coated on surface treatment layer;The tenacity reinforcing layer is made of longitudinal and transverse interlaced glass fiber net and polyurethane elastomer filled in the glass fiber net grid and is compounded into.The utility model by longitudinal and transverse interlaced glass fiber net and polyurethane elastomer compounded tenacity reinforcing layer can significantly improve the tenacity of release paper whole, to avoid the fracture caused in the use process, by the nanometer silicon dioxide coating of plasma activation treatment as surface treatment layer, can effectively improve the adhesion of release agent.

Description

Technical Field

[0001] This utility model relates to the field of release material technology, specifically a high-toughness clean release paper. Background Technology

[0002] Release paper, also known as silicone paper or anti-stick paper, primarily serves to isolate sticky substances, such as adhesive tape. It is generally peeled off and discarded during use. Its most widespread application is as a carrier for adhesive tapes or other adhesive products, and it also has applications in the food and medical industries.

[0003] Traditional release paper uses a pure paper base or PE coated structure, which has problems such as insufficient toughness and easy tearing. Especially in high-speed automatic mounting scenarios, the low mechanical strength can cause tape breakage and machine shutdown. Existing technologies can improve strength by increasing the thickness of the substrate, but this leads to a decrease in flexibility and an increase in cost. Therefore, we propose a high-toughness clean release paper. Utility Model Content

[0004] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, the technical solution adopted by this utility model is as follows:

[0006] A high-toughness clean release paper includes: a substrate layer, a toughness-reinforcing layer laminated on the upper surface of the substrate layer, a surface treatment layer coated on the upper surface of the toughness-reinforcing layer, and a release agent layer coated on the surface treatment layer; the toughness-reinforcing layer is composed of a cross-laminated glass fiber mesh and a polyurethane elastomer filled between the glass fiber mesh.

[0007] In a preferred embodiment, the present invention can be further configured such that the substrate layer is a biaxially oriented polyester film with a thickness of 30-80 μm.

[0008] In a preferred embodiment, the present invention can be further configured such that the mesh density of the glass fiber mesh is 50-200 mesh and the diameter of the single filament is 5-15 μm;

[0009] The Shore hardness of the polyurethane elastomer is 60A-90A.

[0010] In a preferred embodiment, the present invention can be further configured such that the surface treatment layer is a plasma-activated nano-silica coating with a thickness of 0.5-2 μm.

[0011] In a preferred embodiment, the present invention can be further configured such that the release agent layer is made of modified silicone resin.

[0012] In a preferred embodiment, the present invention may further be configured to include an antistatic layer located on the lower surface of the substrate layer, the antistatic layer being formed by coating with carbon black conductive paint.

[0013] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0014] 1. This utility model uses a toughness-enhancing layer composed of crisscrossing glass fiber mesh and polyurethane elastomer to significantly improve the overall toughness of the release paper, thereby avoiding breakage during use.

[0015] 2. This invention uses a plasma-activated nano-silica coating as a surface treatment layer, which can effectively improve the adhesion of the release agent. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the high-toughness clean release paper of this utility model;

[0017] Figure 2 This is a schematic diagram of the toughness-enhancing layer structure of this utility model.

[0018] Figure label:

[0019] 1. Substrate layer; 2. Toughness reinforcement layer; 21. Fiberglass mesh; 22. Polyurethane elastomer; 3. Surface treatment layer; 4. Release agent layer; 5. Antistatic layer. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0021] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0022] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a high-toughness, clean release paper.

[0023] Combination Figures 1-2As shown, the present invention provides a high-toughness clean release paper, comprising: a substrate layer 1, a toughness reinforcing layer 2 laminated on the upper surface of the substrate layer 1, a surface treatment layer 3 coated on the upper surface of the toughness reinforcing layer 2, and a release agent layer 4 coated on the surface treatment layer 3; the toughness reinforcing layer 2 is composed of a cross-laminated glass fiber mesh 21 and a polyurethane elastomer 22 filled between the meshes of the glass fiber mesh 21. By forming the toughness reinforcing layer 2 by the cross-laminated glass fiber mesh 21 and the polyurethane elastomer 22, the overall toughness of the release paper can be significantly improved, thereby avoiding breakage during use.

[0024] Specifically, the crisscrossing glass fiber mesh 21 can form a rigid skeleton to resist longitudinal / transverse tearing, while the polyurethane elastomer 22 can fill the mesh to absorb impact energy, prevent the fiber mesh from breaking brittlely, and comprehensively improve the toughness of the release paper.

[0025] Furthermore, the substrate layer 1 is a biaxially oriented polyester film, i.e., a PET film, with a thickness of 30-80 μm. The thickness is controlled as follows: if it is too thin (<30 μm), the mechanical strength will be insufficient; if it is too thick (>80 μm), the flexibility will decrease. Therefore, 30-80 μm is more reasonable. Biaxial stretching can oriented the molecular chains, providing basic high strength and high modulus. In this way, basic toughness is maintained under ultra-thin conditions, and the cost is only 1 / 5 of that of polyimide film, which is a reasonable design.

[0026] On the other hand, the mesh density of the glass fiber mesh 21 is 50-200 meshes and the diameter of the single filament is 5-15μm. When the mesh density of the glass fiber mesh 21 is <50 meshes, the reinforcing effect is weak, and >200 meshes leads to insufficient elastomer filling. Therefore, 50-200 meshes is the most reasonable.

[0027] Furthermore, the Shore hardness of the polyurethane elastomer 22 is 60A-90A. The hardness range of the polyurethane elastomer 22 is <60A, which makes it easy to deform, and >90A, which causes it to lose its cushioning ability. Therefore, 60A-90A is the most reasonable.

[0028] Furthermore, the surface treatment layer 3 is a plasma-activated nano-silica coating with a thickness of 0.5-2μm. The nano-silica can fill the surface micropores and prevent the barrier agent from penetrating into the substrate, while plasma activation can generate Si-OH bonds, enhancing the interlayer bonding force.

[0029] Furthermore, the release agent layer 4 is made of modified silicone resin, and phenyl groups are introduced to improve compatibility with the surface treatment layer, thereby achieving a release force stability of ±10%, suitable for precision electronic mounting.

[0030] The technical solution also includes an antistatic layer 5 located on the lower surface of the substrate layer 1. The antistatic layer 5 is formed by coating with carbon black conductive coating, which can eliminate static electricity during high-speed peeling and prevent dust adsorption.

[0031] In the functional laminated system of this application, expressions such as "located at", "set at", "composite at", and "located in" specifically refer to molecular / interface level bonding. Specific implementation methods include vapor deposition bonding, hot pressing bonding, solution coating-drying, plasma treatment coupling, co-extrusion casting, dip coating, and adhesive bonding. Such descriptions explicitly exclude mechanical connection forms such as welding, riveting, or screw fixing.

[0032] The above explanation of layered structures refers to the configuration relationship that can be understood and implemented by those skilled in the art based on the function of the relevant components, the context, and common knowledge. Its purpose is to clearly describe the relative positions, cooperation methods, and functional implementation paths between structures. To ensure smooth and concise reading of the manual and to facilitate understanding, no separate explanation is provided after the corresponding terms.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-toughness, clean release paper, characterized in that, include: Substrate layer (1), toughness reinforcement layer (2) composited on the upper surface of substrate layer (1), surface treatment layer (3) coated on the upper surface of toughness reinforcement layer (2), and release agent layer (4) coated on surface treatment layer (3); The toughness-enhancing layer (2) is composed of a cross-laminated glass fiber mesh (21) and a polyurethane elastomer (22) filled between the glass fiber mesh (21).

2. The high-toughness clean release paper according to claim 1, characterized in that, The substrate layer (1) is a biaxially oriented polyester film with a thickness of 30-80 μm.

3. The high-toughness clean release paper according to claim 1, characterized in that, The glass fiber mesh (21) has a mesh density of 50-200 mesh and a single filament diameter of 5-15 μm; The Shore hardness of the polyurethane elastomer (22) is 60A-90A.

4. The high-toughness clean release paper according to claim 1, characterized in that, The surface treatment layer (3) is a plasma-activated nano-silica coating with a thickness of 0.5-2μm.

5. The high-toughness clean release paper according to claim 1, characterized in that, The release agent layer (4) is made of modified silicone resin.

6. The high-toughness clean release paper according to any one of claims 1-5, characterized in that, It also includes an antistatic layer (5) located on the lower surface of the substrate layer (1), the antistatic layer (5) being formed by coating with carbon black conductive coating.

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