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Preparation method of stacking-resistant rigid medium-sized hollow blow molding material

A medium-sized and rigid technology, applied in the field of stacking-resistant rigid medium-sized hollow blow molding materials, can solve problems such as affecting product appearance and insufficient stacking rigidity, and achieve high melt strength, high weight-average molecular weight, and excellent stacking resistance. performance effect

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research found that the hollow barrel blown by imported HXM50100 or the medium-sized hollow blow molding material produced by the original CPC process package is soft, and the stacking rigidity is slightly insufficient, which will affect the appearance of the product

Method used

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  • Preparation method of stacking-resistant rigid medium-sized hollow blow molding material
  • Preparation method of stacking-resistant rigid medium-sized hollow blow molding material
  • Preparation method of stacking-resistant rigid medium-sized hollow blow molding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The diluent isobutane is always in a circulating state. The monomers ethylene and 1-hexene are injected into the loop reactor respectively, and the activated NTR-972 chromium catalyst is added for reaction. The ethylene feed rate is 30t / h, the feed rate of 1-hexene is 360kg / h, the feed rate of isobutane is 20t / h, the feed rate of catalyst is 180kg / h, and the reaction temperature is 100°C until the melt flow rate of the reaction product is 10.5g / 10min, and the density 0.952g / cm 3 , the reaction was stopped to obtain an ethylene-hexene copolymerized polyethylene resin with a weight average molecular weight of 187,000, a molecular weight distribution of 8.7, and a 1-hexene comonomer content of 0.09 mol%.

[0039] Raw materials (parts by weight) of medium-sized hollow container blow molding material:

[0040] Ethylene hexene copolymerized polyethylene resin 99.75 parts

[0041] Compounding additive ST-510 0.25 parts

[0042] Preparation method of medium-sized hollow con...

Embodiment 2

[0045] The diluent isobutane is always in a circulating state. The monomers ethylene and 1-hexene are injected into the loop reactor respectively, and the activated NTR-972 chromium catalyst is added for reaction. The ethylene feed rate is 35t / h, the feed rate of 1-hexene is 105kg / h, the feed rate of isobutane is 28t / h, the feed rate of catalyst is 175kg / h, the reaction temperature is 98°C, until the melt flow rate of the reaction product is 8.5g / 10min, the density 0.956g / cm 3 , the reaction was stopped to obtain an ethylene-hexene copolymerized polyethylene resin with a weight average molecular weight of 198,000, a molecular weight distribution of 9.6, and a 1-hexene comonomer content of 0.04 mol%.

[0046] Raw materials (parts by weight) of medium-sized hollow container blow molding material:

[0047] Ethylene hexene copolymerized polyethylene resin 99.90 parts

[0048] Compounding additive ST510 0.10 parts

[0049] Preparation method of medium-sized hollow container blo...

Embodiment 3

[0052] The diluent isobutane is always in a circulating state. The monomers ethylene and 1-hexene are injected into the loop reactor respectively, and the activated NTR-972 chromium catalyst is added for reaction. The ethylene feed rate is 45t / h, 1-hexene feed rate is 360kg / h, isobutane feed rate 22.5t / h, catalyst feed rate 288kg / h, reaction temperature 101 ℃, until the melt flow velocity of reaction product is 7.5g / 10min, The density is 0.953g / cm 3 , the reaction was stopped to obtain an ethylene-hexene copolymerized polyethylene resin with a weight average molecular weight of 204,000, a molecular weight distribution of 11.7, and a 1-hexene comonomer content of 0.08 mol%.

[0053] Raw materials (parts by weight) of medium-sized hollow container blow molding material:

[0054] Ethylene hexene copolymerized polyethylene resin 99.80 parts

[0055] Compounding additive ST510 0.20 parts

[0056] Preparation method of medium-sized hollow container blow molding material:

[005...

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Abstract

The invention discloses a preparation method of a stacking-resistant rigid medium-sized hollow blow molding material and an application of the prepared stacking-resistant rigid medium-sized hollow blow molding material. The preparation method comprises the steps that ethylene-hexene copolymerized polyethylene resin and auxiliaries are mixed and then subjected to extrusion granulation in a mixing mill, blow molding material particles are obtained, preferably, the content of a 1-hexene comonomer in the ethylene-hexene copolymerized polyethylene resin is 0.04 mol% to 0.10 mol%. The medium-sized hollow container blow molding material prepared by the preparation method disclosed by the invention is moderate in hexene content, wide in molecular weight distribution, high in density, high in crystallinity, strong in rigidity, high in melt strength, small in mold release expansion and stable in parison, and the processability and various physical and mechanical properties meet the requirements of medium-sized hollow container blow molding; a medium-sized hollow container blown by using the material disclosed by the invention has excellent stacking resistance.

Description

technical field [0001] The invention relates to a blow molding material, in particular to a method for preparing a stacking-resistant rigid medium-sized hollow blow molding material. Background technique [0002] High-density polyethylene (HDPE) has become the most widely used raw material resin in hollow blow molding products due to its high molecular weight, good thermal stability, corrosion resistance, and easy processing. The products have been used in pesticides, liquid chemicals, and detergents. , beverages, food packaging and other fields, and showing a rapid growth trend. Compared with steel drums, all-plastic drums have the advantages of light weight, waterproof, moisture-proof, simple molding process, low production cost, no seams, and easy printing. Although the heat resistance, barrier performance, and impact resistance of plastic barrels are not as good as those of steel barrels, with the development of plastic technology, these properties of plastic barrels, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08F210/16
CPCC08L23/0815C08F210/16C08F210/14C08F2500/12C08F2500/07C08F2500/04C08F2500/11Y02W30/80
Inventor 岑静芸蔡伟马宇罡庆增利刘国禹唐海滨莫益燕钟朝云彭叶
Owner CHINA PETROLEUM & CHEM CORP
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