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Black wrapping film and preparation method thereof

A stretch film and black technology, which is applied in the field of black stretch film and its preparation, can solve the problems of large amount of tackifier masterbatch, short delivery cycle, and increased cost, and achieve low production equipment requirements, good control, and lighten the environment. The effect of pressure

Inactive Publication Date: 2018-04-17
XIAMEN JUFU PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the black stretch film needs to be stored for about 30 days from production to use before it can have a certain viscosity, and the amount of tackifier masterbatch added in production is also large, resulting in a corresponding increase in cost, and often many customers require shorter delivery Cycle time and high cost performance

Method used

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  • Black wrapping film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A black stretch film, the raw materials of which are calculated by mass percentage: 82% of linear low-density polyethylene, 2% of black masterbatch, 6% of tackifying masterbatch, and 10% of recycled material;

[0023] Wherein said black masterbatch is calculated by mass percentage, comprises: carrier polyethylene 43%, carbon black 44%, dispersant is the polyethylene wax 13% of number-average relative molecular weight 2000, and does not contain the smooth agent of soap salt or opening agent;

[0024] Wherein, the tackifying masterbatch includes: 55% of polyethylene and 45% of polyisobutylene in terms of mass percentage.

[0025] Wherein the recycled material is leftover material generated during the stretch film preparation process.

[0026] The preparation method of above-mentioned black stretch film, comprises:

[0027] 1) Put the linear low-density polyethylene, black masterbatch, thickening masterbatch and recycled material into the mixer in proportion, stir and mi...

Embodiment 2

[0030] A black stretch film, the raw materials of which are calculated by mass percentage: 61% of linear low density polyethylene, 20% of metallocene linear low density polyethylene, 3% of black masterbatch, 6% of tackifying masterbatch, and 10% of recycled material ;

[0031] Wherein said black masterbatch is calculated by mass percentage, comprises: carrier polyethylene 50%, carbon black 30%, dispersant is the polyethylene wax 20% of number-average relative molecular weight 3000, and does not contain the smooth agent of soap salt or opening agent;

[0032] Wherein, the tackifying masterbatch includes: 45% polyethylene and 55% polyisobutylene in terms of mass percentage.

[0033] Wherein the recycled material is leftover material generated during the stretch film preparation process.

[0034] The preparation method of above-mentioned black stretch film, comprises:

[0035] 1) Put linear low-density polyethylene, metallocene linear low-density polyethylene, black masterbatc...

Embodiment 3

[0038] A black stretch film, the raw materials of which are calculated by mass percentage, including: 83% of linear low-density polyethylene, 8% of black masterbatch, and 9% of tackifying masterbatch;

[0039] Wherein the black masterbatch is calculated by mass percentage, comprising: 50% of carrier polyethylene, 25% of carbon black, 25% of polyethylene wax with a number-average molecular weight of 3500 as a dispersant, and does not contain soap salts such as zinc stearate , calcium stearate and other slip agents or anti-blocking agents;

[0040] Wherein, the tackifying masterbatch includes: 65% of polyethylene and 35% of polyisobutylene in terms of mass percentage.

[0041] Wherein the recycled material is leftover material generated during the stretch film preparation process.

[0042] The preparation method of above-mentioned black stretch film, comprises:

[0043] 1) Put the linear low density polyethylene, black masterbatch and tackifier masterbatch into the mixer in pr...

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Abstract

The invention discloses a black wrapping film and a preparation method thereof. The black wrapping film is prepared from the following raw materials: 37 to 99.6 parts of linear low density polyethylene, 0 to 50 parts of metallocene linear low density polyethylene, 0.2 to 10 parts of black masterbatch, 0.2 to 10 parts of viscosity-increasing masterbatch, 0 to 30 parts of reclaimed material; whereinthe black masterbatch is prepared from 40 to 70 parts of polyethylene, 20 to 55 parts of carbon black, 5 to 30 parts of polyethylene wax with number average relative molecular mass of 1000 to 4000; the viscosity-increasing masterbatch is prepared from 40 to 70 parts of polyethylene and 30 to 60 parts of polyisobutene in parts by mass. The raw materials are uniformly mixed to prepare the wrappingfilm by adopting a film casting method, wherein the temperature of film forming is 170 to 290 DEG C, the temperature of a cooling roller is 15 to 35 DEG C and the speed ratio is 1.01 to 1.2. Accordingto the invention, relatively less viscosity-increasing masterbatch is used, the better viscidity is obtained, the release of the viscidity is quick, the delivery cycle is greatly shortened; meanwhile, the reclaimed material is adopted, the cost is lower, the environment influence is less, the preparation method is simple and convenient, the requirement on production equipment is low and easy to control, and the preparation method is suitable for continuous production.

Description

technical field [0001] The invention relates to the technical field of stretch films, in particular to a black stretch film and a preparation method thereof. Background technique [0002] Stretch film, also known as stretch film and heat shrinkable film, was the first in China to use PVC (polyvinyl chloride) as the base material, DOA (dioctyl adipate) as the plasticizer and self-adhesive to produce PVC stretch film. Due to environmental protection issues, high cost (compared to PE (polyethylene), relatively large proportion, small unit packaging area), poor stretchability, etc., when PE stretch film was produced in China from 1994 to 1995, it was gradually eliminated. PE stretch film first uses EVA (ethylene-vinyl acetate copolymer) as self-adhesive material, but its cost is high and tasteful, and later developed with PIB (polyisobutylene) and VLDPE (very low-density polyethylene) as self-adhesive material , The substrate is now dominated by LLDPE (linear low-density polyet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L23/22C08K5/098C08J5/18
CPCC08J5/18C08L23/0815C08L2203/16C08L2205/02C08L2205/025C08L2205/035C08L23/06C08L23/22C08K5/098
Inventor 陈建朝杨胜利许萍萍
Owner XIAMEN JUFU PLASTIC PRODS
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