Self-adhesive EVA (Ethylene-Vinyl Acetate) protective film and manufacturing process thereof

A technology of self-adhesive protective film and self-adhesive layer, which is applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., and can solve the problems of large changes in adhesive force over time, difficult control of adhesive force, and inability to repeatedly paste , to achieve the effect of small change, no foreign matter residue, and low production process cost

Active Publication Date: 2014-03-19
东莞市尼的科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The self-adhesive protective film in the prior art is difficult to control, and it is easy to be difficult to tear or easy to degumming. After attachment, the adhesive force changes greatly with time, and it cannot be pasted repeatedly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] An EVA self-adhesive protective film is composed of a three-layer co-extrusion bonded film of a base film layer, an intermediate layer and a self-adhesive layer,

[0067] The base film layer is made up of the following raw materials in parts by weight:

[0068] LLDPE 10 parts

[0069] 2 parts of LDPE;

[0070] The intermediate layer is made up of the following raw materials in parts by weight:

[0071] LLDPE 8 parts

[0072] LDPE 2 parts

[0073] Chlorinated EVA 1 part

[0074] Masterbatch 0 parts

[0075] The self-adhesive layer is made up of the following raw materials in parts by weight:

[0076] EVA 30 parts

[0077] Chlorinated EVA 3 parts

[0078] LLDPE 4 parts

[0079] 1 part of LDPE

[0080] 1 part ethylene glycol distearic acid

[0081] 1 POE.

[0082] The melt index of the base film layer LLDPE is 1.7g / 10min, and the density is 0.916g / cm 3 ; The melt index of the base film layer LDPE is 0.24g / 10min, and the density is 0.922g / cm 3 .

[0083] The me...

Embodiment 2

[0091] An EVA self-adhesive protective film is composed of a three-layer co-extrusion bonded film of a base film layer, an intermediate layer and a self-adhesive layer,

[0092] The base film layer is made up of the following raw materials in parts by weight:

[0093] LLDPE 12 parts

[0094] 3 parts of LDPE;

[0095] The intermediate layer is made up of the following raw materials in parts by weight:

[0096] LLDPE 11 parts

[0097] 4 parts of LDPE

[0098] Chlorinated EVA 2 parts

[0099] Color masterbatch 2 copies

[0100] The self-adhesive layer is made up of the following raw materials in parts by weight:

[0101] EVA 35 parts

[0102] Chlorinated EVA 4 parts

[0103] LLDPE 5 parts

[0104] LDPE 2 parts

[0105] 2 parts ethylene glycol distearic acid

[0106] 2 copies of POE.

[0107] The melt index of the base film layer LLDPE is 1.9g / 10min, and the density is 0.917g / cm 3 ; The melt index of the base film layer LDPE is 0.25g / 10min, and the density is 0.923g / c...

Embodiment 3

[0116] An EVA self-adhesive protective film is composed of a three-layer co-extrusion bonded film of a base film layer, an intermediate layer and a self-adhesive layer,

[0117] The base film layer is made up of the following raw materials in parts by weight:

[0118] LLDPE 12 parts

[0119] 3 parts of LDPE;

[0120] The intermediate layer is made up of the following raw materials in parts by weight:

[0121] LLDPE 13 parts

[0122] 3 parts of LDPE

[0123] Chlorinated EVA 2 parts

[0124] Color masterbatch 2 copies

[0125] The self-adhesive layer is made up of the following raw materials in parts by weight:

[0126] EVA 35 parts

[0127] Chlorinated EVA 4 parts

[0128] LLDPE 5 parts

[0129] LDPE 2 parts

[0130] 2 parts ethylene glycol distearic acid

[0131] 2 copies of POE.

[0132] The melt index of the base film layer LLDPE is 2.1g / 10min, and the density is 0.919g / cm 3 ; The melt index of the base film layer LDPE is 0.25g / 10min, and the density is 0.922g / c...

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Abstract

The invention relates to the technical field of protective films and particularly relates to a self-adhesive EVA (Ethylene-Vinyl Acetate) protective film and a manufacturing process thereof. The self-adhesive EVA protective film is formed by a film which is coextruded and adhered by a base film layer, a middle layer and a self-adhesive layer. Especially, due to the self-adhesive layer, adhesive force of the EVA self-adhesive protective film is moderate, so that the self-adhesive EVA protective film is easily stuck and torn; after the film is stuck, the change of the adhesive force along with the time is small, the self-adhesive EVA protective film can be stuck repeatedly without adhesive failure and residual foreign matters, and can be used in special and large-corner surfaces with a radian and without upwarping; since the specific material combination of the base film layer, the middle layer and the self-adhesive layer is adopted, the impact resistance is also greatly improved; the manufacturing process of the self-adhesive EVA protective film is low in cost and is simple.

Description

technical field [0001] The invention relates to the technical field of protective films, in particular to an EVA self-adhesive protective film and a manufacturing process thereof. Background technique [0002] With the development of science and technology, digital products have been greatly developed. In order to prevent scratches on the shells or screens of these digital products during use, thereby affecting their appearance. Therefore, users usually use a protective film to cover their casing or screen. Especially on the screen of digital products, it is the place where users most often use protective films for protection. [0003] In the self-adhesive protective film in the prior art, the adhesion is difficult to control, it is easy to be difficult to tear or degummed, the adhesion changes greatly with time after attachment, and it cannot be pasted repeatedly. Contents of the invention [0004] Purpose of the present invention is exactly to provide a kind of EVA se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/30B32B27/18
Inventor 刘敏林永贵
Owner 东莞市尼的科技股份有限公司
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