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

A linear low-density, polyethylene technology, applied in the direction of transportation and packaging, packaging, wrapping paper, etc., can solve the problems of insufficient flatness of products, poor fluidity of materials, poor quality, etc., and achieve melt pressure drop and fluidity The effect of raising and lowering the processing temperature

Active Publication Date: 2021-04-30
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

[0004] The purpose of the present invention is to overcome the problems of poor fluidity and strong smell of materials used in the preparation process of CPE existing in the prior art; precipitates and redness of the finished CPE products after being placed for a long time, insufficient flatness and poor quality of the product, and to provide auxiliary agents Composition and linear low density polyethylene composition and preparation method and polyethylene cast packaging film

Method used

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

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preparation example Construction

[0025] The second aspect of the present invention provides the preparation method of the above-mentioned additive composition, comprising: 15-30 parts by weight of antioxidant 1010, 15-30 parts by weight of antioxidant 168, 5-10 parts by weight of zinc stearate , 5-10 parts by weight of hydrotalcite, 15-30 parts by weight of silicon dioxide, 10-25 parts by weight of erucamide and 1-5 parts by weight of antistatic agent 1800 are mixed to obtain an auxiliary agent composition.

[0026] A third aspect of the present invention provides a linear low-density polyethylene composition, wherein the linear low-density polyethylene composition comprises: based on the total weight of the linear low-density polyethylene composition, containing 94-97% by weight of A linear low-density polyethylene and 3-6% by weight of the aforementioned additive composition, wherein the linear low-density polyethylene has a melt index of 4-5g / 10min and a density of 0.93- 0.935g / cm 3 .

[0027] In the pre...

Embodiment 1

[0048] (1) preparation auxiliary composition:

[0049] Based on the total weight of the additive composition, antioxidant 1010 with a content of 25% by weight, antioxidant 168 with a content of 20% by weight, zinc stearate with a content of 8% by weight, and Zinc stearate with a content of 8% by weight Hydrotalcite, silicon dioxide with a content of 21% by weight, erucamide with a content of 15% by weight and antistatic agent 1800 with a content of 3% by weight were mixed to obtain an auxiliary agent composition.

[0050] (2) Preparation of linear low density polyethylene composition

[0051] (2.1) Prepared by the Unipol gas phase process, the melt index at 190°C under a load of 2.16kg is 4.5g / 10min, and the density is 0.933g / cm 3 Linear low density polyethylene (powder).

[0052] (2.2) The linear low density polyethylene obtained by the step (2.1) of 94 parts by weight and the auxiliary agent composition obtained by the step (1) of 6 parts by weight are blended, and passed ...

Embodiment 2

[0061] (1) preparation auxiliary composition:

[0062] 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 15% by weight, the zinc stearate with a content of 11% by weight, and the zinc stearate with a content of 9% by weight Hydrotalcite, silicon dioxide with a content of 24% by weight, erucamide with a content of 25% by weight and antistatic agent 1800 with a content of 1% by weight were mixed to obtain an auxiliary agent composition.

[0063] (2) Preparation of linear low density polyethylene composition

[0064] (2.1) Prepared by the Unipol gas phase process, the melt index at 190°C under a load of 2.16kg is 4g / 10min, and the density is 0.930g / cm 3 Linear low density polyethylene (powder).

[0065] (2.2) The linear low-density polyethylene obtained by the step (2.1) of 97 parts by weight and the auxiliary agent composition obtained by the step (1) of 3 parts by weight are blend...

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Abstract

The invention relates to the field of polyethylene cast packaging film, and discloses an auxiliary agent composition, a linear low-density polyethylene composition, a preparation method and a polyethylene cast packaging film. An additive composition, based on the total weight of the composition, the composition comprises the following components and content: (1) Antioxidant 1010, 15%-30%; (2) Antioxidant 168, 15%-30% 30%; (3) zinc stearate, 5%‑10%; (4) hydrotalcite, 5%‑10%; (5) silicon dioxide, 15%‑30%; (6) erucamide, 10% %‑25%; (7) Antistatic agent 1800, 1%‑5%. The invention improves the processing performance of the polyethylene cast packaging film, improves the fluidity of materials, improves the production efficiency and reduces the production cost. The polyethylene cast packaging film prepared at the same time has good plasticization, normal crystal point, smooth surface, high flatness, high tear strength, no precipitates and no redness after being placed for a long time.

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 blown film have begun to gradually switch to CPE. [0003] At present, most of the CPE production lines on the market are transformed from CPP, and a small part is composed of imported main parts and assembled domestically. The production line generally adopts a production plan based on low-melt finger-line materials. The fluidity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K13/02C08K3/26C08K3/36C08K5/20C08K5/098C08K5/17C08L23/08C08L23/06C08J5/18B65D65/40
CPCB65D65/40C08J5/18C08J2323/08C08J2423/06C08K3/26C08K3/36C08K5/098C08K5/17C08K5/20C08K13/02C08K2201/003C08K2201/006C08L23/0815
Inventor 方忠阳孟鸿诚陈燕斌林华杰钟士晓陈建国柳翼李一敏向春宇史绽春
Owner 中石化宁波新材料研究院有限公司
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