Die pads for optical film production
A technology of optical film and knife mold, which is applied in the direction of layered products, chemical instruments and methods, synthetic resin layered products, etc. Enhanced flexibility and elasticity, long stamping life, and reduced specific gravity
Active Publication Date: 2018-10-26
SUZHOU KECHUANG ELECTRONICS MATERIAL CO LTD
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0003] At present, the traditional die pad is made of foam material, which is easy to tear and affects the die-cutting, making the product easy to fluff and not smooth, the mold is easy to damage the blade, and the cut products are broken and sometimes continuous.
Method used
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Embodiment approach
[0019] As an embodiment of the present invention, the raw material of the EVA micelle is a mixture of ethylene vinyl acetate EVA, polyolefin elastomer POE and thermoplastic elastomer SEBS. The mass ratio of the ethylene vinyl acetate EVA, the polyolefin elastomer POE and the thermoplastic elastomer SEBS is (50-60): (30-45): (5-10); by adding the thermoplastic elastomer SEBS in the upper surface layer The flexibility and elasticity of the upper surface are enhanced, and the addition of POE can enhance the flexibility of the upper surface.
[0020] As an embodiment of the present invention, the foaming agent is azodicarbonamide, and its dosage is 5-10% of the weight of the raw material of the EVA micelle.
[0021] As an embodiment of the present invention, the filler is a mixture of light magnesium carbonate powder and talcum powder with a weight ratio of 3 to 5:7 to 5, and the mixture is surface treated with a silane coupling agent. The amount of the filler is 10-15% of the we...
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Abstract
The invention discloses a film mat for optical film production. The film mat comprises an upper surface layer, a core layer and a lower surface layer, wherein the core layer is arranged between the upper surface layer and the lower surface layer, and the upper surface layer comprises an EVA (Ethyl Vinyl Acetate) rubber particle raw material, a foaming agent, a filling agent and a foaming aid; the core layer comprises a polyurethane adhesive; and the lower surface layer comprises the following components in percentage by mass: 90-95% of PET (Polyethylene Terephthalate) and 5-10% of inorganic particles. The cutting die mat for optical film production has good rebound effect and long stamping life, can guarantee the durability of a die, and achieves a better effect during stamping.
Description
technical field [0001] The invention relates to a die pad. More specifically, the present invention relates to a die pad for optical film production. Background technique [0002] In the LCD production industry, a large number of optical films such as polarizing films, diffusion films, and brightness enhancement films are used. In the process of cutting and forming optical films, die pads are indispensable. The main function of the die pad is to rebound, which is to prevent the material on the die-cutting mold from being embedded in the bottom plate of the mold. After cutting the material, it can quickly leave the mold without bringing the material up. Another function is to The moment of pressing and cutting has a fixed effect on the material, especially when the punching is narrow and the distance between the blade and the blade is close. Under the high-speed punching of die-cutting, the material cannot be rebounded quickly and cannot be completely reset. The die-cut mate...
Claims
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IPC IPC(8): C08L23/08C08L53/02C08L67/02C08K9/06C08K3/26C08K3/34C08J9/10C09J175/04C09J11/06B32B27/36B32B27/08B32B27/32B32B27/30B32B27/18B32B7/12B32B33/00
CPCB32B7/12B32B27/08B32B27/18B32B27/30B32B27/32B32B27/36B32B33/00B32B2264/10B32B2305/30B32B2307/51B32B2307/54B32B2307/554B32B2307/558B32B2307/5825C08J9/103C08J2203/04C08J2323/08C08J2453/02C08K5/12C08K5/544C08K2201/003C08L23/0853C08L67/02C08L2205/02C08L2205/03C09J11/06C09J175/04C08L23/0815C08L53/025C08K9/06C08K2003/267C08K3/34
Inventor 李彦
Owner SUZHOU KECHUANG ELECTRONICS MATERIAL CO LTD