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Whitening process of PE (Polyethylene) stretch film

A stretch wrapping film and process technology, applied in the direction of layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problem of unfavorable product sales and use, different colors of stretch wrapping films, and unsightly appearance, etc. problem, to improve the appearance of products, improve transparency and brightness, and improve the effect of mottled problems

Inactive Publication Date: 2014-03-05
XIAMEN JUFU PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the recycled materials contain variegated colors, the stretch wrap film will have different colors and unsightly appearance, which is not conducive to the sales and use of the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The single-layer extrusion process of this process, the ratio per 100 kg: 88.9-55 kg of LLDPE or MLLDPE, 10-35 kg of recycled materials (at least one of PE recycled materials or PP recycled materials), 0.1-3 kg of whitening agent, 1 to 7 kg of tackifier (polyisobutylene PIB or ultra-low density polyethylene VLDPE) mixed.

Embodiment 2

[0017] The double-layer extrusion process (A layer / B layer) of this process, the ratio per 100 kg: consists of 10 kg of A layer and 90 kg of B layer; wherein, the A layer is based on the percentage of the total weight of the double-layer structure, by 9.8-7 kg of LLDPE or MLLDPE and 0.2-3 kg of tackifier (polyisobutylene PIB or ultra-low-density polyethylene VLDPE) are mixed; B layer is composed of 0.9-35 kg of recycled materials according to the percentage of the total weight of the double-layer structure (PE recycled material, PP recycled material at least one kind), 0.1-3 kg of whitening agent, 89-47 kg of LLDPE or MLLDPE and 0-5 kg ​​of tackifier (polyisobutylene PIB or ultra-low density polyethylene VLDPE) mixed become.

Embodiment 3

[0019] The double-layer extrusion process (A layer / B layer) of this process, the ratio per 100 kg: consists of 20 kg of A layer and 80 kg of B layer; among them, the percentage of A layer according to the total weight of the double-layer structure is composed of 19.8-17 kg of LLDPE or MLLDPE and 0.2-3 kg of tackifier (polyisobutylene PIB or ultra-low density polyethylene VLDPE); B layer is made of 0.9-35 kg of recycled materials according to the percentage of the total weight of the double-layer structure (at least one kind of PE recycled material and PP recycled material), 0.1-3 kg of whitening agent, 79-37 kg of LLDPE or MLLDPE and 0-5 kg ​​of tackifier (polyisobutylene PIB or ultra-low density polyethylene VLDPE) mixed become.

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Abstract

The invention provides a whitening process of a PE (Polyethylene) stretch film. In a production process, a whitening agent is added, a mixed color problem of the stretch film produced by a reclaimed material is solved, transparency and brightness of the stretch film are improved, and product appearance is improved. The whitening process can respectively adopt a single-layer extruding process, a double-layer extruding process and a three-layer extruding process. In the single-layer extruding process, the stretch film is prepared by mixing 88.9wt%-55wt% of LLDPE (Linear Low Density Polyethylene) or MLLDPE (Metallocene Linear Low Density Polyethylene), 10%-35% of a reclaimed material which is at least one of PE reclaimed material or PP (Polypropylene) reclaimed material, 0.1%-3% of a whitening agent, and 1%-7% of a tackifier which is polyisobutene PIB or very low density polyethylene VLDPE. As for either the single-layer extruding process or the double-layer extruding process or the three-layer extruding process, product tensile strength is not less than 7 N in longitudinal direction and is not less than 3.5 N in transverse direction. The whitening process disclosed by the invention improves the mixed color problem of the stretch film produced by the reclaimed material, improves the transparency and brightness of the stretch film and improves the product appearance.

Description

technical field [0001] The invention relates to a whitening process for PE stretched stretch film. Background technique [0002] Using PE recycled materials or at least one kind of PP recycled materials to produce PE stretch stretch film can recycle resources, save energy and protect the environment. However, because the recycled materials contain variegated colors, the stretch wrap film will have different colors and unsightly appearance, which is not conducive to the sales and use of the product. Contents of the invention [0003] The purpose of the present invention is to provide a PE stretch stretch film whitening process. In the production process, whitening agents are added to improve the motley problem of stretch stretch film produced from recycled materials, improve the transparency and brightness of the film, and improve the product. Exterior. [0004] The present invention is realized in such a way that a single-layer extrusion process, a double-layer extr...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08L23/12C08L23/20B32B27/06B32B27/32
CPCC08L23/0815B32B27/08B32B27/32B32B2250/02B32B2250/03B32B2250/242B32B2307/412B32B2323/00B32B2323/04B32B2323/10C08J5/18C08J2323/08C08J2423/06C08J2423/12C08J2423/22C08L2201/10C08L2203/16C08L2205/03C08L2207/064C08L23/06C08L23/12C08L23/22
Inventor 陈建朝
Owner XIAMEN JUFU PLASTIC PRODS
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