Polypropylene film packaging material and preparation method thereof

A polypropylene film and packaging material technology, applied in the field of packaging materials, can solve problems such as food safety hazards, poor ink adhesion, and high surface resistance of the film, reduce the probability of foaming and delamination, solve static problems, Effect of Surface Resistance Reduction

Inactive Publication Date: 2014-11-05
SUZHOU SHENGBAIWEI PACKAGE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene film is often used as a flexible packaging material, and its consumption is second only to polyethylene. However, the existing polypropylene materials mainly have problems such as low polarity, poor adhesion to ink, easy foaming and even delamination.
The coefficient of friction of polypropylene film material is too large to meet the requirements of automatic packaging production lines. The surface resistance of the film is relatively large and it is easy to generate static electricity. However, general flexible packaging workshops will contain a certain concentration of organic solvents, which will bring safety hazards and other issues.
[0003]In order to solve these problems, people add slip agent to PP resin to increase the polarity of PP film, improve the ink adhesion and reduce the friction coefficient of the film, but There has been no good solution to the problem of excessive organic solvents. At the same time, small molecule chemicals such as slip agents and antistatic agents may migrate into the packaged food, bringing hidden dangers to food safety.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 75kg of polypropylene, 25kg of maleic anhydride grafted polypropylene, 10kg of calcium stearate, 5kg of cyclodextrin, 2kg of acrylic acid, 3kg of tetramethylammonium bisulfate and 0.05kg of graphene, at 320 rpm Stir and mix evenly, wherein the graft ratio of maleic anhydride grafted polypropylene is 20%;

[0032] (2) Pour into the reactor and stir for 30 minutes, heat to 140°C, pressurize at 0.65MPa, and react for 2 hours to obtain a polymerized melt;

[0033] (3) Add 19 kg of polyethylene glycol with an average molecular weight of 4000 to the product of step 2, then extrude, pelletize, and dry at 240°C to obtain slices;

[0034] (4) Melting and extruding the slices in step 3, winding the cast slices, biaxially stretching them at a temperature of 110°C, cooling and setting them to obtain a polypropylene film packaging material;

[0035] The performance test results of the prepared polypropylene film packaging material are shown in Table 1.

Embodiment 2

[0037] (1) Weigh 80kg of polypropylene, 30kg of maleic anhydride grafted polypropylene, 25kg of calcium stearate, 18kg of cyclodextrin, 4kg of acrylic acid, 4kg of tetramethylammonium bisulfate and 1.5kg of graphene, at 550 rpm Stir and mix evenly, wherein the graft ratio of maleic anhydride grafted polypropylene is 35%;

[0038] (2) Pour into the reaction kettle and stir for 40 minutes, heat to 150 ° C, pressurize 0.65 MPa, and react for 3 hours to obtain a polymerized melt;

[0039] (3) Add 15 kg of polyethylene glycol with an average molecular weight of 6000 to the product of step 2, then extrude, pelletize and dry at 260°C to obtain slices;

[0040] (4) Melting and extruding the slices in step 3, winding the cast slices, biaxially stretching them at a temperature of 115°C, cooling and setting them to obtain a polypropylene film packaging material;

[0041] The performance test results of the prepared polypropylene film packaging material are shown in Table 1.

Embodiment 3

[0043] (1) Weigh 90kg of polypropylene, 20kg of maleic anhydride grafted polypropylene, 20kg of calcium stearate, 15kg of cyclodextrin, 3kg of acrylic acid, 2kg of tetramethylammonium bisulfate and 1.0kg of graphene, at 450 rpm Stir and mix evenly, wherein the graft ratio of maleic anhydride grafted polypropylene is 30%;

[0044] (2) Pour into the reactor and stir for 50 minutes, heat to 130°C, pressurize at 0.65MPa, and react for 2 hours to obtain a polymerized melt;

[0045] (3) Add 10 kg of polyethylene glycol with an average molecular weight of 4000 to the product of step 2, then extrude, pelletize, and dry at 250°C to obtain slices;

[0046] (4) Melting and extruding the slices in step 3, winding the cast slices, biaxially stretching them at a temperature of 110°C, cooling and setting them to obtain a polypropylene film packaging material;

[0047] The performance test results of the prepared polypropylene film packaging material are shown in Table 1.

[0048] Table...

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Abstract

The invention discloses a polypropylene film packaging material and a preparation method thereof. The polypropylene film packaging material is composed of the following components by weight: 75-90 parts of polypropylene, 20-30 parts of maleic anhydride grafted polypropylene, 10-25 parts of calcium stearate, 10-19 parts of polyethylene glycol, 5-18 parts of cyclodextrin and 0.05-1.5 parts of graphene. The polypropylene film packaging material prepared by the method has good adhesion with ink, can meet requirements of various automatic packaging production lines, and reduces occurrence possibility of static electricity.

Description

technical field [0001] The invention belongs to the field of packaging materials, in particular to a polypropylene film packaging material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a thermoplastic resin prepared by the polymerization of propylene, which is divided into three types: isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. Polypropylene film is often used as a flexible packaging material, and its consumption is second only to polyethylene. However, the existing polypropylene materials mainly have problems such as low polarity, poor adhesion to ink, easy foaming and even delamination. . The coefficient of friction of polypropylene film material is too large to meet the requirements of automatic packaging production lines. The surface resistance of the film is relatively large and it is easy to generate static electricity. However, general flexible packaging workshops will contain a certain con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08L71/08C08L5/16C08K13/02C08K5/098C08K3/04
CPCC08L23/12C08J5/18C08J2323/12C08J2451/06C08L2201/04C08L2203/16C08L2205/035
Inventor 张太元
Owner SUZHOU SHENGBAIWEI PACKAGE EQUIP
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