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PE stretching and wrapping film and preparation process thereof

A technology of stretch wrapping film and middle layer, applied in the field of PE stretch wrapping film and its preparation process, can solve the problems of poor puncture resistance and tear resistance, unable to meet large-scale applications, and poor transverse tear strength. , to achieve the effect of improving comprehensive performance, good resistance to environmental stress cracking, and uniform thickness

Active Publication Date: 2021-05-28
宁波市元祥新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional PE stretch wrap film has poor film uniformity, large thickness error, low longitudinal elongation, low yield point, poor transverse tear strength, puncture resistance and tear resistance during actual use. Poor, unable to meet large-scale applications

Method used

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  • PE stretching and wrapping film and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In this example, the PE stretch wrapping film is co-extruded from the outer layer, the middle layer and the inner layer. The mass ratio of the outer layer material, the middle layer material and the inner layer material is 1:3:1. The thickness of the film was 24 μm.

[0029] The outer layer material includes the following components in parts by mass: 68 parts of linear low-density polyethylene (LLDPE), 4 parts of linear medium-density polyethylene (LMDPE), and 8 parts of metallocene (MPE);

[0030] The middle layer material includes the following components in parts by mass: 60 parts of linear low-density polyethylene (LLDPE), 3 parts of linear medium-density polyethylene (LMDPE), and 7 parts of metallocene (MPE);

[0031] The inner layer material includes the following components in mass fractions: 56 parts of linear low density polyethylene (LLDPE), 2 parts of metallocene (MPE), and 3 parts of tackifier.

[0032] Among them, the tackifier is polyisobutylene (PIB).

...

Embodiment 2

[0038] In this example, the PE stretch wrapping film is co-extruded from the outer layer, the middle layer and the inner layer. The mass ratio of the outer layer material, the middle layer material and the inner layer material is 1:2:0.5. The thickness of the film was 26 μm.

[0039] The outer layer material includes the following components in parts by mass: 60 parts of linear low-density polyethylene (LLDPE), 3 parts of linear medium-density polyethylene (LMDPE), and 6 parts of metallocene (MPE);

[0040]The middle layer material includes the following components in parts by mass: 55 parts of linear low-density polyethylene (LLDPE), 2 parts of linear medium-density polyethylene (LMDPE), and 5 parts of metallocene (MPE);

[0041] The inner layer material includes the following components in mass fractions: 50 parts of linear low density polyethylene (LLDPE), 5 parts of metallocene (MPE), and 5 parts of tackifier.

[0042] Among them, the outer layer material, the middle laye...

Embodiment 3

[0046] In this example, the PE stretch wrapping film is co-extruded from the outer layer, the middle layer and the inner layer. The mass ratio of the outer layer material, the middle layer material and the inner layer material is 1:5:1.5. The thickness of the film was 23 μm.

[0047] The outer layer material includes the following components in parts by mass: 74 parts of linear low-density polyethylene (LLDPE), 8 parts of linear medium-density polyethylene (LMDPE), and 12 parts of metallocene (MPE);

[0048] The middle layer material includes the following components in parts by mass: 65 parts of linear low-density polyethylene (LLDPE), 1 part of linear medium-density polyethylene (LMDPE), and 10 parts of metallocene (MPE);

[0049] The inner layer material includes the following components in mass fractions: 70 parts of linear low density polyethylene (LLDPE), 6 parts of metallocene (MPE), and 1 part of tackifier.

[0050] Among them, the outer layer material, the middle lay...

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Abstract

The invention discloses a PE stretching and wrapping film which is formed by co-extruding an outer layer material, a middle layer material and an inner layer material. The outer layer material comprises the following components in parts by mass: 60-80 parts of linear low-density polyethylene, 3-8 parts of linear medium-density polyethylene and 6-12 parts of metallocene; the middle layer material comprises the following components in parts by mass: 55-70 parts of linear low-density polyethylene, 2-6 parts of linear medium-density polyethylene and 5-10 parts of metallocene; the inner-layer material comprises the following components in parts by mass: 50-70 parts of linear low-density polyethylene, 2-8 parts of metallocene and 1-5 parts of a tackifier. The PE stretching and wrapping film disclosed by the invention is relatively high in uniformity and flatness, high in transparency and excellent in puncture resistance and tear resistance.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a PE stretch wrapping film and a preparation process thereof. Background technique [0002] PE stretch stretch film has the advantages of strong tensile strength, high elongation, good self-adhesiveness, puncture resistance and tear resistance, etc. It can be used for manual stretch film and machine stretch film, and is widely used in chemical products , electronic product boxes, ceramic products, mechanical and electrical equipment and other container packaging. [0003] Stretch film has the following characteristics: (1) Unitization: Unitization is one of the biggest characteristics of stretch film packaging. With the help of the super strong winding force and retractability of the film, the products are compactly and fixedly bundled into a unit, so that scattered Small pieces become a whole, and the product does not have any looseness and separation even in an unf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B27/18B32B27/06B32B33/00B65D65/40B29C69/02B29C48/00B29C48/08B29C48/21B29C41/00B29C41/24
CPCB32B27/32B32B27/327B32B27/18B32B27/08B32B33/00B65D65/40B29C69/02B29C48/022B29C48/08B29C48/21B29C41/003B29C41/24B32B2250/242B32B2307/50B32B2307/558B32B2307/306B32B2307/30B32B2307/5825B32B2307/54B32B2323/046B32B2323/04B32B2553/00Y02W30/80
Inventor 唐彬彬黄阳
Owner 宁波市元祥新材料有限公司