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Auxiliary composition and its preparation method, linear low density polyethylene composition and its preparation method, and polyethylene cast packaging film

A linear low-density, composition technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc. The effect of smooth film, less precipitate and low haze

Active Publication Date: 2022-02-18
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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  • Auxiliary composition and its preparation method, linear low density polyethylene composition and its preparation method, and polyethylene cast packaging film
  • Auxiliary composition and its preparation method, linear low density polyethylene composition and its preparation method, and polyethylene cast packaging film

Examples

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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 casting packaging film, and discloses 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. Based on the total weight of the auxiliary composition, the auxiliary composition includes 15-20% by weight of hindered phenolic antioxidant, 15-20% by weight of phosphite antioxidant, 2-20% by weight of stearate 5% by weight, hydrotalcite 2‑15% by weight, silicon dioxide 40‑50% by weight, antistatic agent 1‑3% by weight. The additive composition formed by the above formula is mixed with linear low-density polyethylene and metallocene, and the extruded film has smooth surface, no crystal point, low haze, low heat sealing temperature, and excellent processing performance.

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 Patents(China)
IPC IPC(8): C08K13/02C08K5/134C08K5/526C08K5/098C08K3/26C08K3/36C08L23/08C08L23/06C08J5/18B32B27/32B32B27/18B32B27/06
CPCC08K13/02C08K5/1345C08K5/526C08K5/098C08K3/26C08K3/36C08J5/18B32B27/32B32B27/18B32B27/06B32B2250/03B32B2250/242B32B2307/412B32B2307/50C08K2201/003C08K2201/006C08J2323/08C08J2423/06
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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