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Polypropylene type optical protective film

A polypropylene type, protective film technology, used in optics, optical components, chemical instruments and methods, etc., can solve the problems of complex processing procedures, poor temperature resistance, high production costs, and achieve good thickness uniformity and no solvent residue. , the effect of low cost

Active Publication Date: 2013-10-02
湖北慧狮塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a polypropylene optical protective film to solve the technical problems of the existing polyethylene self-adhesive protective film such as poor stability, poor temperature resistance, complicated processing procedures, and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the smooth layer is made up of 100 parts of propylene binary block copolymers with an ethylene content of 5%-15% and 0.1 part of high-purity erucamide slip agent; the core layer is composed of ethylene content of 5%-15% 100 parts of propylene binary block copolymer, 20 parts of olefin and propylene copolymer (POP, comonomer content is 18-22%) with α-olefin being C4-C8, and 0.1 part of antistatic agent; The adhesive layer is composed of 100 parts of metallocene catalyzed polypropylene (mPP), 100 parts of olefin and propylene copolymer (POP with a comonomer content of 18-22%) and ethylene vinyl acetate copolymer ( EVA) 40 parts. The above-mentioned three-layer materials are melted through three single-screw extruders respectively, and then film-formed through batching block connector, T-shaped die head co-extrusion, casting and cooling. After the product is cooled and shaped, thickness tested, corona treated, online slitting, winding and packaging, the fina...

Embodiment 2

[0021] Embodiment 2: The smooth layer is composed of 100 parts of propylene binary block copolymer and 0.15 parts of high-purity erucamide slip agent with an ethylene content of 5%-15%; the core layer is composed of 5%-15% ethylene content Composed of 100 parts of propylene binary block copolymer, 20 parts of olefin and propylene copolymer (POP, comonomer content of 18-22%) with α-olefin being C4-C8, and 0.2 part of antistatic agent; self-adhesive layer 100 parts of metallocene catalyzed polypropylene (mPP), 150 parts of olefin and propylene copolymer (POP, comonomer content of 18-22%) with α-olefin of C4-C8 and ethylene vinyl acetate copolymer (EVA) 30 servings. The above-mentioned three-layer materials are melted through three single-screw extruders respectively, and then film-formed through batching block connector, T-die co-extrusion and cast cooling. After the product is cooled and shaped, thickness tested, corona treated, online slitting, winding and packaging, the fina...

Embodiment 3

[0022] Embodiment 3: smooth layer is made up of 100 parts of propylene ternary block copolymers with ethylene content of 5%-15% and 0.2 part of high-purity erucamide slip agent; the core layer is composed of ethylene content of 5%-15% 100 parts of propylene binary block copolymer, 20 parts of olefin and propylene copolymer (POP, comonomer content is 18-22%) with α-olefin being C4-C8, and 0.15 parts of antistatic agent; The adhesive layer is composed of 100 parts of metallocene catalyzed polypropylene (mPP), 80 parts of olefin and propylene copolymer (POP with a comonomer content of 18-22%) and ethylene vinyl acetate copolymer ( EVA) 20 parts. The above-mentioned three-layer materials are melted through three single-screw extruders respectively, and then film-formed through batching block connector, T-die co-extrusion and cast cooling. After the product is cooled and shaped, thickness tested, corona treated, online slitting, winding and packaging, the final product is obtained...

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Abstract

The invention provides a polypropylene type optical protective film which is composed of a smooth layer, a central layer and a self pasting layer, the total thickness ranges from 20 micrometer to 70 micrometer, the thickness of the smoothness layer accounts for 10 percent to 20 percent of the total thickness, the thickness of the central layer accounts for 40 percent to 60 percent of the total thickness, and the thickness of the self pasting layer accounts for 10 percent to 30 percent of the total thickness. The protective film provided by the invention has the characteristics of low cost, no residual glue picture, less crystal points, better appearance, no residual solvent, uniform initial viscidity, easiness in control, and the like. The polypropylene type optical protective film provided by the invention adjusts the adhesion strength by adding proper content of POP and EVA. In addition, the invention adopts propylene block copolymers as the main producing materials, so as to enable the surface of the protective film to be provided with a certain shading effect and rough surface performance, and play a role of sunscreen and pressure proofing to the substrates under protection accordingly. Comparing with general PE protective film which achieves the purpose of extinction by adding flatting agents, the protective film provided by the invention further avoids the impact of the inorganic impurities or carbide crystal points to the appearance of the protective film.

Description

technical field [0001] The invention relates to a protective film, in particular to a polypropylene type optical protective film produced by casting process. Background technique [0002] A protective film is a thin film used to protect vulnerable surfaces. Its purpose is to prevent the surface of the protected substrate from being damaged or polluted during transportation, assembly, or processing. The protective film will always be attached to the surface of the protected substrate and will not be torn off and discarded until the product is delivered to the user. [0003] Optical film refers to coating or coating one or more layers of dielectric film or metal film or a combination of these two types of films on optical components or independent substrates to change the transmission characteristics of light waves, including light transmission, Reflection, absorption, scattering, polarization and phase changes. Therefore, through proper design, the transmittance and reflec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/10G02B1/04B32B27/08B32B27/18B32B27/30B32B27/32C08L53/00C08K5/20C08L23/14C08L23/12C08L23/08G02B1/14
Inventor 王焕清罗建民武冬瑞卢长伟刘兵倪玉良
Owner 湖北慧狮塑业股份有限公司
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