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Additive composition and preparation method thereof, linear low-density polyethylene composition and preparation method thereof, and polyethylene cast packaging film

A linear low-density, composite technology, applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of small precipitates on the surface of the film layer, poor opening performance, low haze, etc., to achieve The effect of smooth film, less precipitates and low haze

Active Publication Date: 2020-12-15
中石化宁波新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an auxiliary agent composition in order to overcome the existing problems of complex linear low-density polyethylene raw materials for heat-sealing layers, poor opening performance, polycrystalline points on the surface of the formed film layer, and large haze in the prior art. Its preparation method, linear low-density polyethylene composition and its preparation method, and polyethylene casting packaging film, the linear low-density polyethylene composition used in the heat-sealing layer has the functions of reducing the heat-sealing temperature, improving the fluidity of the film layer, and the film Small precipitates and low haze on the surface of the layer

Method used

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  • Additive composition and preparation method thereof, linear low-density polyethylene composition and preparation method thereof, and polyethylene cast packaging film
  • Additive composition and preparation method thereof, linear low-density polyethylene composition and preparation method thereof, and polyethylene cast packaging film

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Effect test

Embodiment 1

[0054] This embodiment is used to prepare polyethylene cast packaging film, and concrete steps are as follows:

[0055] (1) preparation auxiliary composition:

[0056] Based on the total weight of the additive composition, the antioxidant 1010 with a content of 18% by weight, the antioxidant 168 with a content of 18% by weight, the zinc stearate with a content of 5% by weight, and the hydrotalcite with a content of 8% by weight (DHT-4A, particle size 0.4 μm), silicon dioxide (AB905, particle size 5 μm) with a content of 48% by weight and antistatic agent 1800 with a content of 3% by weight were mixed to obtain an additive composition.

[0057] (2) Preparation of linear low density polyethylene composition:

[0058] Prepared by the Unipol gas phase process, the melt index is 4.0g / 10min and the density is 0.927g / cm at 2.16kg load and 190°C 3 linear low density polyethylene;

[0059] Based on the total weight of the linear low-density polyethylene composition, the auxiliary ag...

Embodiment 2

[0067] This embodiment is used to prepare polyethylene cast packaging film, and concrete steps are as follows:

[0068] (1) preparation auxiliary composition:

[0069] Based on the total weight of the additive composition, the antioxidant 1010 with a content of 15% by weight, the antioxidant 168 with a content of 20% by weight, the zinc stearate with a content of 5% by weight, and the hydrotalcite with a content of 10% by weight (particle size: 0.7 μm), silicon dioxide (particle size: 8 μm) with a content of 48% by weight and antistatic agent 1800 with a content of 2% by weight were mixed to obtain an additive composition.

[0070] (2) Preparation of linear low density polyethylene composition:

[0071] Prepared by the Unipol gas phase process, the melt index is 3.5g / 10min and the density is 0.925g / cm at 2.16kg load and 190°C 3 linear low density polyethylene;

[0072] Based on the total weight of the linear low density polyethylene composition, the auxiliary agent composit...

Embodiment 3

[0080] This embodiment is used to prepare polyethylene cast packaging film, and concrete steps are as follows:

[0081] (1) preparation auxiliary composition:

[0082]Based on the total weight of the additive composition, the antioxidant 1010 with a content of 20% by weight, the antioxidant 168 with a content of 15% by weight, the zinc stearate with a content of 5% by weight, and the hydrotalcite with a content of 15% by weight (particle size: 0.5 μm), silicon dioxide (particle size: 8 μm) with a content of 43% by weight and antistatic agent 1800 with a content of 2% by weight were mixed to obtain an additive composition.

[0083] (2) Preparation of linear low density polyethylene composition:

[0084] Prepared by the Unipol gas phase process, the melt index is 3.0g / ml and the density is 0.925g / cm at 2.16kg load and 190°C 3 linear low density polyethylene;

[0085] Based on the total weight of the linear low density polyethylene composition, the auxiliary agent composition ...

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Abstract

The invention relates to the field of polyethylene cast packaging films, and discloses an additive composition and a preparation method thereof, a linear low-density polyethylene composition and a preparation method thereof, and a polyethylene cast packaging film. Based on the total weight of the additive composition, the additive composition comprises the following components in percentage by weight: 15-20% of a hindered phenol antioxidant, 15-20% of a phosphite antioxidant, 2-5% of stearate, 2-15% of hydrotalcite, 40-50% of silicon dioxide and 1-3% of an anti-static agent. The additive composition formed by adopting the formula is mixed with linear low-density polyethylene and metallocene, so that an extrusion-molded film is smooth in surface, free of crystal points, low in haze, low inheat sealing temperature and excellent in process-ability.

Description

technical field [0001] The invention relates to the field of polyethylene casting packaging film, in particular to an auxiliary agent composition and a preparation method thereof, a linear low density polyethylene composition and a preparation method thereof, and a polyethylene casting packaging film. Background technique [0002] Polyethylene cast packaging film (CPE) has low-temperature drop resistance that cannot be replaced by polypropylene cast packaging film (CPP), and it has better flatness and transparency than polyethylene blown film. In the past two years, the market demand for CPE has continued to increase, and manufacturers of CPP and polyethylene blown film have begun to gradually switch to CPE. [0003] CPE on the market usually has a three-layer structure, namely a corona layer, a core layer and a heat-sealing layer. Among them, the heat-sealing layer is generally made of low-melt index linear material (under a load of 2.16kg, the melt index at 190°C is 1.8-2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K5/134C08K5/526C08K5/098C08K3/26C08K3/36C08L23/08C08L23/06C08J5/18B32B27/32B32B27/18B32B27/06
CPCC08K13/02C08K5/1345C08K5/526C08K5/098C08K3/26C08K3/36C08J5/18B32B27/32B32B27/18B32B27/06B32B2250/03B32B2250/242B32B2307/412B32B2307/50C08K2201/003C08K2201/006C08J2323/08C08J2423/06C08L23/0815
Inventor 方忠阳孟鸿诚林华杰柳翼柳兆坤
Owner 中石化宁波新材料研究院有限公司
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