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Polyethylene protective film

A polyethylene protective film, low density polyethylene technology, applied in protective clothing, protective equipment, clothing and other directions, can solve the problems of difficult unwinding and peeling, easy tensile deformation, low tensile strength, etc., to improve product performance and Surface quality, high elongation at break, good tear tensile strength

Inactive Publication Date: 2019-07-02
无锡市融发包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyethylene protective film produced by the traditional process has low tensile strength and is easy to break the film. Especially after the pressure-sensitive adhesive is coated and rewound, the pressure-sensitive adhesive layer has too much adhesion to the inner layer of the polyethylene film, which is not easy to be unwound and peeled off. Tensile deformation, causing the polyethylene protective film to warp or fall off due to creep during the application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A polyethylene protective film, the thickness of the protective film is 0.02mm, and the protective film comprises an unwinding layer, an intermediate layer and a self-adhesive layer successively, and the thicknesses of the unwinding layer, the intermediate layer and the self-adhesive layer account for the total thickness respectively 10%, 70% and 20% of

[0024] The unwrapping layer comprises by weight parts

[0025] 15 parts of low-density polyethylene,

[0026] 8 parts of high-density polyethylene,

[0027] Metallocene polyethylene 7 parts,

[0028] 1 part of functional additive;

[0029] The middle layer comprises by weight parts

[0030] 20 parts of low-density polyethylene,

[0031] Linear density polyethylene 65 parts,

[0032] 8 parts of high-density polyethylene,

[0033] Metallocene polyethylene 7 parts,

[0034] 1 part of functional additive;

[0035] The self-adhesive layer includes by weight

[0036] 18 parts of low-density polyethylene,

[0037] ...

Embodiment 2

[0044] A polyethylene protective film, the thickness of the protective film is 0.06mm, and the protective film comprises an unwinding layer, an intermediate layer and a self-adhesive layer successively, and the thicknesses of the unwinding layer, the intermediate layer and the self-adhesive layer account for the total thickness respectively 20%, 65%, 15%;

[0045] The unwrapping layer comprises by weight parts

[0046] 16 parts of low-density polyethylene,

[0047] 9 parts of high-density polyethylene,

[0048] Metallocene polyethylene 7.5 parts,

[0049] 1.2 parts of functional additives;

[0050] The middle layer comprises by weight parts

[0051] 22 parts of low-density polyethylene,

[0052] 70 parts of linear density polyethylene,

[0053] 10 parts of high-density polyethylene,

[0054] Metallocene polyethylene 8.5 parts,

[0055] 2 parts of functional additives;

[0056] The self-adhesive layer includes by weight

[0057] 19 parts of low-density polyethylene, ...

Embodiment 3

[0065]A polyethylene protective film, the thickness of the protective film is 0.08mm, and the protective film comprises an unwinding layer, an intermediate layer and a self-adhesive layer successively, and the thicknesses of the unwinding layer, the intermediate layer and the self-adhesive layer account for the total thickness respectively 30%, 60%, 10%;

[0066] The unwrapping layer comprises by weight parts

[0067] 18 parts of low-density polyethylene,

[0068] 9.5 parts of high-density polyethylene,

[0069] Metallocene polyethylene 8 parts,

[0070] 1.5 parts of functional additives;

[0071] The middle layer comprises by weight parts

[0072] 25 parts of low-density polyethylene,

[0073] 75 parts linear density polyethylene,

[0074] 12 parts of high-density polyethylene,

[0075] Metallocene polyethylene 10 parts,

[0076] 3 parts of functional additives;

[0077] The self-adhesive layer includes by weight

[0078] 20 parts of low-density polyethylene,

[00...

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Abstract

The invention relates to a protective film, in particular to a polyethylene protective film. The protective film comprises the following materials in parts by weight: 15-25 parts of low density polyethylene, 65-75 parts of linear density polyethylene, 8-12 parts of high density polyethylene, 7-10 parts of metallocene polyethylene, and 1-3 parts of a functional auxiliary agent. The provided polyethylene protective film does not need a pressure sensitive adhesive, has high transparency, good tearing tensile strength and high breaking elongation rate.

Description

technical field [0001] The invention relates to a protective film, especially a polyethylene protective film. Background technique [0002] Protective film is a film used to protect easily damaged surfaces, such as stainless steel plates, aluminum alloy decorative plates, signs, glass, etc. Its purpose is to prevent the surface of the protected substrate from being damaged or contaminated during transportation, assembly, or processing. The protective film will remain on the surface of the protected substrate until the product is delivered to the user before being torn off and discarded. Common protective films generally rely on a layer of pressure-sensitive adhesive on the surface of the base film to achieve adhesion, usually through blow molding, printing, coating and other processes to form the final product. Polyethylene film has the characteristics of softness, good toughness, high elongation, easy bending and good adhesion, and occupies a large market share in protect...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/18B32B27/32
CPCB32B27/08B32B27/18B32B27/32B32B2307/412B32B2307/5825B32B2571/00
Inventor 徐纬
Owner 无锡市融发包装材料有限公司