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Ethylene-vinyl acetate copolymer composition, ethylene-vinyl acetate copolymer film and method for producing same

A technology of ethylene vinyl acetate and copolymer film, which is applied in the direction of chemical instruments and methods, flat products, and other household appliances, and can solve the problems of high adhesion of EVA composition, low surface smoothness of EVA film, and difficulty in forming, etc. , to achieve the effects of excellent adhesion, excellent film-forming properties, and excellent film-forming properties

Inactive Publication Date: 2011-07-27
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the EVA composition has high adhesion to film-forming equipment, such as a heating roller, and it is difficult to form it into a film.
In addition, even if the EVA composition can be formed into a film, there is a problem that the surface smoothness of the obtained EVA film is low.

Method used

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  • Ethylene-vinyl acetate copolymer composition, ethylene-vinyl acetate copolymer film and method for producing same
  • Ethylene-vinyl acetate copolymer composition, ethylene-vinyl acetate copolymer film and method for producing same
  • Ethylene-vinyl acetate copolymer composition, ethylene-vinyl acetate copolymer film and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] The EVA composition containing each material according to the following formulation was supplied to a roll mill, melted and kneaded at 60° C. for 10 minutes, and then calendered to produce an EVA film (thickness 0.4 mm). During calender molding, the temperature of the calender rolls was set at 64° C., and the rotational speed was set at 10 m / min.

[0097] The formulation of the EVA composition:

[0098] Ethylene-vinyl acetate copolymer (28 mass parts of vinyl acetate content relative to 100 mass parts of EVA) 100 mass parts

[0099] 3 parts by mass of crosslinking agent (tert-butyl peroxy-2-ethylhexyl carbonate)

[0100] 2 parts by mass of crosslinking aid (triallyl isocyanurate), and

[0101] Silane coupling agent (γ-methacryloxypropyltrimethoxysilane) 0.5 parts by mass

[0102] 0.01 parts by mass of lubricant (tri-n-octyl trimellitate).

Embodiment 2～5、 comparative example 1 and 2

[0104] Except having used the lubricant in the content shown in Table 1, it carried out similarly to Example 1, and produced the EVA film.

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Abstract

The objective of the invention is to provides an ethylene-vinyl acetate copolymer film having excellent adhesion and excellent film forming properties at the same time. An ethylene-vinyl acetate copolymer composition containing an ethylene-vinyl acetate copolymer, a crosslinking agent and a trimellitic acid ester, said ethylene-vinyl acetate copolymer composition being characterized in that the trimellitic acid ester is contained in an amount of 0.01-3.0 parts by mass per 100 parts by mass of the ethylene-vinyl acetate copolymer.

Description

technical field [0001] The present invention relates to an ethylene-vinyl acetate copolymer film, and particularly relates to an ethylene-vinyl acetate copolymer film suitable for a sealing film for solar cells and an interlayer film for laminated glass. Background technique [0002] Ethylene vinyl acetate copolymer (EVA) film is widely used as an interlayer film for laminated glass and a sealing film for solar cells because of its excellent transparency and adhesiveness. Adhesive film on front filter of display (PDP), etc. [0003] For example, if figure 2 As shown, the solar cell has a structure in which a plurality of power generating elements 24 such as silicon power generating elements are sealed between a front side transparent protective member 21 made of a glass substrate or the like and a back side by a front side sealing film 23A and a back side sealing film 23B. Between the protective parts (back plates) 22 . In this solar cell, EVA films are used as the surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08B29C43/24C03C27/12C08K5/12H01L31/042B29K23/00B29L7/00
CPCC08K5/5425B32B17/10018C08L23/08C08J5/18B29K2031/04C08K5/12B29K2105/0014C08K5/0025C08J2323/08B29C43/24Y02E10/50H01L31/048B32B17/10788H01L31/0481Y10T428/31649C08L23/0853
Inventor 迫尻弘通
Owner BRIDGESTONE CORP
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