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A kind of small hollow container blow molding material and preparation method thereof

A small hollow, raw material technology, applied in the field of blow molding plastics, can solve the problems of reduced rigidity and insufficient hardness of blow molding containers, and achieve the effect of satisfying processing performance and various physical and mechanical properties, stable supply, and good anti-oxidation performance.

Active Publication Date: 2016-02-03
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, a large number of small and medium-sized hollow blow molding processing enterprises are more complicated in the use of raw materials, especially when producing small hollow products, they often use some cheap and easy-to-buy general materials such as 5000S (drawing material) and DGD6098 (film material). , these raw materials, because they are not special grades for hollow blow molding, often have various defects in terms of performance
At the same time, most of the raw materials for HDPE small hollow blow molding on the market currently use ethylene butene or ethylene homopolymer products. Under the same density, hexene ethylene copolymer HDPE shows better environmental stress resistance than ethylene butene copolymer HDPE Cracking performance, if you try to improve the environmental stress cracking resistance by reducing the density, it will cause the rigidity of the blown container itself to decrease and the hardness will not be enough

Method used

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  • A kind of small hollow container blow molding material and preparation method thereof
  • A kind of small hollow container blow molding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Raw materials for ethylene-hexene copolymerized polyethylene base resin:

[0044] The raw materials for the production of base resins are the following substances:

[0045] 1) The feed rate of polymer grade ethylene is 43 tons / hour

[0046] Item Purity % Water Content 10 -6 CO content10 -6 o 2 Content 10 -6

[0047] Index≥99.2≤1≤1≤2

[0048] 2) Catalyst: 969MPI-788-RCP3 of GRACE company, the addition amount is 220kg / hour

[0049] 3) The amount of 1-hexene added is 195kg / hour

[0050] Item Purity % Water Content 10 -6 CO content10 -6 Isomerized alpha olefins

[0051] Index≥98.5≤20≤5≤1%

[0052] 4) diluent isobutane

[0053] The preparation method of ethylene-hexene copolymerized polyethylene base resin:

[0054] The diluent isobutane is always in a circulating state, inject ethylene and 1-hexene into the loop reactor respectively, strictly control the feeding ratio of ethylene and 1-hexene, and add a pre-activated catalyst to control the The reaction temper...

Embodiment 2

[0065] Raw materials for ethylene-hexene copolymerized polyethylene base resin:

[0066] The raw materials for the production of base resins are the following substances:

[0067] 1) The feed rate of polymer grade ethylene is 40 tons / hour

[0068] Item Purity % Water Content 10 -6 CO content10 -6 o 2 Content 10 -6

[0069] Index≥99.2≤1≤1≤2

[0070] 2) Catalyst; 969MPI-788-RCP3 of GRACE company, add-on 200kg / hour

[0071] 3) The amount of 1-hexene added is 180kg / hour

[0072] Item Purity % Water Content 10 -6 CO content10 -6 Isomerized alpha olefins

[0073] Index≥98.5≤20≤5≤1%

[0074] 4) An appropriate amount of diluent isobutane.

[0075] The preparation method of ethylene-hexene copolymerized polyethylene base resin:

[0076] The diluent isobutane is always in a circulating state, inject ethylene and hexene into the loop reactor respectively, strictly control the feed ratio of ethylene and hexene, and add a pre-activated catalyst, and control the reaction tempe...

Embodiment 3

[0085] Raw materials for ethylene-hexene copolymerized polyethylene base resin:

[0086] The raw materials for the production of base resins are the following substances:

[0087] 1) The feed rate of polymer grade ethylene is 38 tons / hour

[0088] Item Purity % Water Content 10 -6 CO content10 -6 o 2 Content 10 -6

[0089] Index≥99.2≤1≤1≤2

[0090] 2) Catalyst: 969MPI-788-RCP3 from GRACE company, the addition amount is 200kg / hour

[0091] 3) The amount of 1-hexene added is 210kg / hour

[0092] Item Purity % Water Content 10 -6 CO content10 -6 Isomerized alpha olefins

[0093] Index≥98.5≤20≤5≤1%

[0094] 4) An appropriate amount of diluent isobutane.

[0095] The preparation method of ethylene-hexene copolymerized polyethylene base resin:

[0096] The diluent isobutane is always in a circulating state, inject ethylene and hexene into the loop reactor respectively, strictly control the feed ratio of ethylene and hexene, and add a pre-activated catalyst, and control t...

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Abstract

The invention discloses a small hollow blown material. The material is prepared from the following raw materials in parts by weight: 99.95-98.80 parts of ethylene hexylene copolymerized polyethylene base resin, 0.02-0.4 part of antioxidant, and 0.03-0.8 part of co-antioxidant. The invention also discloses a method for preparing the small hollow blown material. According to the blown material for small hollow containers, the ethylene hexylene copolymerized polyethylene base resin is adopted and has good environmental stress cracking resistance, outstanding oxidation resistance and good corrosion resistance; low n-hexane extract is contained, so that the blown material is suitable for blowing various corrosion resistance small hollow containers, such as small package containers for filling chemical solvent, pesticide, herbicide, detergent and industrial lubricant, also can be used for food and medicine packages with strict requirement for hygiene, the product is easy to granulate and stable in supply.

Description

technical field [0001] The invention belongs to the field of blow molding plastics, and in particular relates to a small hollow container blow molding material and a preparation method thereof. Background technique [0002] Polyethylene is the earliest variety of plastic hollow blow molding materials to realize commercial production, and it is also one of the varieties with wide application range, low price and wide source. In addition, it also has good processing performance, so it is widely used in the preparation of various types of hollow products. [0003] In comparison, the mechanical properties, rigidity, heat resistance and chemical corrosion resistance of high-density polyethylene (HDPE) are superior to low-density polyethylene (LDPE, LLDPE). Therefore, in polyethylene hollow blow molding products, The vast majority use HDPE. Among them, lightweight hollow container products accounted for more than 80% of HDPE hollow products. Widely used in medicine bottles, bev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K5/134C08K5/527C08F210/02B29B9/06
CPCC08F210/16C08F2400/02C08K5/1345C08K5/526C08L23/0815C08F210/14
Inventor 马宇罡蔡伟苏和跃黄艳芳梁平唐海滨
Owner CHINA PETROLEUM & CHEM CORP
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