Rigid-tough balanced medium-sized hollow container blow molding material

A balanced and medium-sized technology, applied in the field of blow molding materials, can solve problems such as unstable quality, unstable supply, poor rigidity-toughness balance, etc., and achieve excellent rigidity-toughness balance performance and broad application prospects

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

[0005] At present, there is a shortage of special materials for blow molding of HDPE medium-sized hollow containers in China. Most enterprises use small hollow materials, LLDPE materials, and HDPE film materials for production, and the product quality cannot be stabilized.
Due to the unstable quality of this kind of raw materials and poor rigidity-toughness balance, some products are soft or broken when dropped.
A small number of enterprises use imported HDPE medium-sized hollow special raw materials, but the supply is unstable and the cost is too high

Method used

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  • Rigid-tough balanced medium-sized hollow container blow molding material
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  • Rigid-tough balanced medium-sized hollow container blow molding material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Preparation of ethylene-hexene copolymerized polyethylene resin

[0051] When the diluent isobutane is always in circulation, the monomers ethylene and 1-hexene are injected into the loop reactor respectively, and the activated 969ID chromium catalyst is added for reaction, wherein the ethylene feed rate is 25t / h, 1-hexene feed rate is 450kg / h, isobutane feed rate 31.25t / h, catalyst feed rate 360kg / h, reaction temperature 99.5 ℃, until the melt flow velocity of reaction product is 10.5g / 10min, The density is 0.945g / cm 3 , the reaction was stopped to obtain an ethylene-hexene copolymerized polyethylene resin with a weight-average molecular weight of 189,000, a molecular weight distribution index of 4.8, and a 1-hexene content of 0.28 mol%.

[0052] (2) Preparation of medium-sized hollow container blow molding materials

[0053] After mixing 99.82 parts of ethylene-hexene copolymerized polyethylene resin, 0.08 part of primary antioxidant, 0.08 part of auxiliary ant...

Embodiment 2

[0055] (1) Preparation of ethylene-hexene copolymerized polyethylene resin

[0056] When the diluent isobutane is always in circulation, the monomers ethylene and 1-hexene are injected into the loop reactor respectively, and the activated 969ID chromium catalyst is added for reaction, wherein the ethylene feed rate is 36t / h, 1-hexene feed rate is 216kg / h, isobutane feed rate 28.3t / h, catalyst feed rate 270kg / h, reaction temperature 99.7 ℃, until the melt flow velocity of reaction product is 8.5g / 10min, The density is 0.949g / cm 3 , the reaction was stopped to obtain an ethylene-hexene copolymerized polyethylene resin with a weight average molecular weight of 192,000, a molecular weight distribution index of 5.4, and a 1-hexene content of 0.22 mol%.

[0057] (2) Preparation of medium-sized hollow container blow molding materials

[0058] After mixing 99.8 parts of ethylene-hexene copolymerized polyethylene resin, 0.04 parts of primary antioxidant, 0.10 part of auxiliary antio...

Embodiment 3

[0060] (1) Preparation of ethylene-hexene copolymerized polyethylene resin

[0061] When the diluent isobutane is always in a circulating state, the monomer ethylene and 1-hexene are injected into the loop reactor respectively, and the activated 969ID chromium catalyst is added to react, wherein the ethylene feed rate is 30t / h, the feed rate of 1-hexene is 240kg / h, the feed rate of isobutane is 50t / h, the feed rate of catalyst is 300kg / h, and the reaction temperature is 98°C until the melt flow rate of the reaction product is 7.8g / 10min, density 0.946g / cm 3 , the reaction was stopped to obtain an ethylene-hexene copolymerized polyethylene resin with a weight-average molecular weight of 183,000, a molecular weight distribution index of 4.2, and a 1-hexene content of 0.28 mol%.

[0062] (2) Preparation of medium-sized hollow container blow molding materials

[0063] After mixing 99.72 parts of ethylene-hexene copolymerized polyethylene resin, 0.18 parts of primary antioxidant...

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Abstract

The invention relates to a rigid-tough balanced blow molding material for a medium-sized hollow container. The rigid-tough balanced blow molding material is prepared from raw materials including ethylene-hexene copolymerized polyethylene resin, a main antioxidant, an auxiliary antioxidant and a release agent through extrusion granulation, wherein the density of the ethylene-hexene copolymerized polyethylene resin is 0.945-0.949 g/cm<3>, the melt flow index is 7.8-11.8 g/10min, the molecular weight distribution index is 4-6, and the weight-average molecular weight is 150000-250000; and the molar content of 1-hexene in the ethylene-hexene copolymerized polyethylene resin is 0.2 to 0.3 mol percent. The medium-sized hollow container blow molding material provided by the invention has excellent rigidity-toughness balance performance and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of blow molding materials, and in particular relates to a blow molding material for medium-sized hollow containers with rigidity and toughness balance. Background technique [0002] 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, such as impact resistance, rigidity, and barrier properties, have been greatly improved. At present, it has been widely used in the packaging of various dangerous and non-hazardous chemicals, oil products and various liquids. [0003] Medium-sized hollow products mainly refer to HDPE blow-molded packaging barrels of various specificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08F210/16C08F210/14
CPCC08L23/0815C08F210/16C08F210/14
Inventor 岑静芸蔡伟马宇罡庆增利李梅李静静邵磊山刘国禹
Owner CHINA PETROLEUM & CHEM CORP
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