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Radiation pre-crosslinked ethylene-vinyl acetate (EVA) resin film and preparation method thereof

A vinyl acetate, pre-crosslinking technology, applied in the field of plastic films, can solve the problems of dirty processing equipment, poor dimensional stability, poor dimensional stability, etc., to improve dimensional stability and heat resistance, easy to use and Transportation, suitable for large-scale promotion and application

Active Publication Date: 2014-05-21
SHANGHAI HIUV NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used EVA film has no degree of cross-linking before use, and its dimensional stability is not good. It is easy to overflow from the edge of the glass during heating and use to dirty the processing equipment.
When the colored EVA film and the transparent EVA film are laid up and down and used at the same time, due to poor dimensional stability, the interface between the colored film and the transparent film is often unclear and affects the appearance

Method used

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  • Radiation pre-crosslinked ethylene-vinyl acetate (EVA) resin film and preparation method thereof
  • Radiation pre-crosslinked ethylene-vinyl acetate (EVA) resin film and preparation method thereof
  • Radiation pre-crosslinked ethylene-vinyl acetate (EVA) resin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The formula of EVA film is as follows:

[0026]

[0027] The above components are fully mixed and then added to the extruder. The temperature of the extruder is 110°C, and the temperature of the mold is 110°C; extrude through a T-shaped flat die to form a film, wind up, and radiate to obtain radiation pre-crosslinked ethylene- Vinyl acetate resin film. The thickness of the EVA film is 2 mm, and the length of a single roll is 200 meters; the EVA film is wound with a three-inch paper core.

[0028] The EVA film was passed under the electron beam generator and rolled onto another three inch paper core. The radiation is electron beam radiation with an intensity of 30KGY. The degree of cross-linking of the EVA film was measured after irradiation, and the range was between 25% and 35%. The pre-crosslinked EVA film is cut into the same size as the double-layer glass and placed between the double-layer glass, vacuumed and pressurized and heated to 200 degrees Celsius for ...

Embodiment 2

[0030] The formula of EVA film is as follows:

[0031] Element

parts by weight

EVA resin, VA content 28%

78

Ultrafine barium sulfate (4000 mesh)

19.5

Triallyl cyanurate (TAC)

0.5

tert-butyl peroxy-2-ethylhexyl carbonate (TBEC)

1

Bis(2,2,6,6-tetramethyl-4-piperidine) sebacate (antioxidant 770)

0.5

3-Methacryloxypropyltrimethoxysilane (A-174)

0.5

[0032] The above components are fully mixed and then added to the extruder. The temperature of the extruder is 90°C, and the temperature of the mold is 90°C; it is extruded into a film through a T-shaped flat die, wound up, and irradiated to obtain radiation pre-crosslinked ethylene- Vinyl acetate resin film. The thickness of the EVA film is 0.1 mm; the EVA film is wound with a 3-inch paper core.

[0033] The EVA film after winding is a roll film with a length of 100 meters. The whole film is placed under the electron beam, and the radiation dose ...

Embodiment 3

[0036] The formula of EVA film is as follows:

[0037] Element

parts by weight

EVA resin, VA content 33%

92.5

carbon black

5

Triallyl isocyanurate (TAIC)

1

2,5-Dimethyl-2,5-bis(tert-butylperoxy)hexane (two dipenta)

0.5

N,N'-di-sec-butyl-p-phenylenediamine (Antioxidant 4720)

0.5

Vinyltrimethoxysilane (silane coupling agent A-171)

0.5

[0038] The above components are fully mixed and then added to the extruder. The temperature of the extruder is 100°C, and the mold temperature is 102°C; extruded into a film through a T-shaped flat die, wound up, and irradiated to obtain radiation pre-crosslinked ethylene- Vinyl acetate resin film. The thickness of the EVA film is 0.7 mm, and the length of a single roll is 300 meters; the EVA film is wound with a three-inch paper core.

[0039] Place the EVA film as a whole under the X-ray generating device, and the radiation intensity is 100KGY. The degree o...

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Abstract

The invention discloses a radiation pre-crosslinked ethylene-vinyl acetate (EVA) resin film which comprises the following components in parts by weight: 51-99.58 parts of EVA resin, 0.3-2 parts of organic peroxide crosslinking agent, 0.01-5 parts of assistant crosslinking agent, 0.1-2 parts of antioxidant, 0.01-2 parts of silane coupling agent, 0-40 parts of pigment and 0-40 parts of polyolefin elastomer. The invention also discloses a preparation method of the radiation pre-crosslinked EVA resin film, which comprises the steps of sufficiently mixing 51-99.58 parts of EVA resin, 0.3-2 parts of organic peroxide crosslinking agent, 0.01-5 parts of assistant crosslinking agent, 0.1-2 parts of antioxidant, 0.01-2 parts of silane coupling agent, 0-40 parts of pigment and 0-40 parts of polyolefin elastomer, and adding into an extruder; extruding and forming a film through a T-shaped flat mould; rolling and radiating to obtain the radiation pre-crosslinked EVA resin film. Since the film is partially crosslinked before use, the dimensional stability and heat resistance of the film are remarkably improved, thus the film is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of plastic films, in particular to the technical field of ethylene-vinyl acetate resin (EVA) films, specifically radiation pre-crosslinked ethylene-vinyl acetate resin films and a preparation method thereof. Background technique [0002] Radiation crosslinking is a technical means of using various radiations to initiate crosslinking reactions between long chains of polymer polymers. Radiation refers to various nuclear radiations such as electron beams, gamma rays, neutron beams, particle beams, etc. Light radiation such as ultraviolet light, etc., uses ultraviolet light to trigger crosslinking reactions, which is called photocrosslinking, which is essentially a kind of radiation crosslinking. The lack of tight bonding between polymer molecular chains makes the overall material deform or break when subjected to external force and ambient temperature, which limits its application. Through the cross-linking r...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K13/02C08K5/14C08J3/28C08J3/24C09J123/08C09J11/04C09J11/06C09J11/08
CPCC08J5/18C08J2323/08C08K3/04C08K3/30C08K5/14C08K5/34924C08K13/02C08K2003/3045C08L23/0853C08L2203/16C08L2312/06C09J7/00C09J11/04C09J11/06C09J123/0853C08L23/0815C08K2003/2241C08K5/103
Inventor 李民王权
Owner SHANGHAI HIUV NEW MATERIALS
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