Copolyester composition for producing high-capacity polyester bottle

A copolyester and formulation technology, applied in containers, rigid containers, packaging, etc., can solve the problems of inability to stably blow bottles, production decline, and no economic value.

Inactive Publication Date: 2004-12-15
NANYA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the preform has crystal whitening, it will cause the subsequent bottle blowing step to be unable to blow the bottle stably; in addition, if the cooling time of the preform is prolonged to avoid the phenomenon of crystal whitening of the preform, it will lead to a decrease in output and has no economic value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 79.54 kg of pure terephthalic acid (PTA), 4.755 kg of meta-phthalic acid (IPA), 1.38 kg of diethylene glycol (DEG) and 37.78 kg of ethylene glycol (EG), and stir them to form a uniform slurry Afterwards, heat the slurry to 260°C to carry out the esterification reaction, and the esterification pressure is maintained at 1.5 to 2.0Kg / cm 2 , when the esterification rate reaches more than 95%, add 14 grams of phosphoric acid, 45 grams of antimony acetate and 100 grams of cobalt acetate, and heat up to 270 ° C for prepolymerization. The reaction pressure is controlled at 760-20 torr. After 1 hour of reaction, the The temperature is raised to 280°C, the vacuum degree is lowered to below 1 torr, and the polycondensation reaction is carried out until the intrinsic viscosity reaches 0.60dl / g, and then it is extruded through a die and cooled to cut into cylindrical polyester raw particles. The IPA content of this polyester raw particle was analyzed to be 5.5 mol % based on th...

Embodiment 2

[0032] The same as in Example 1, but the composition of the synthetic copolyester contains 4.5 mol % of IPA, 2.5 mol % of DEG, and the intrinsic viscosity after solid phase polymerization is 0.81 dl / g.

[0033] According to DSC analysis, the crystallization exotherm was 6.8 J / g.

[0034] The preform produced by the injection machine has good transparency and no crystal whitening phenomenon; the preform can be stably made into a 5-gallon bottle after stretch blow molding, with good transparency and strength.

Embodiment 3

[0036] The same as in Example 1, but the synthetic copolyester contains 2.5 mol % of IPA, 2.5 mol % of DEG and 5.0 mol % of 2,6-dicarboxylic acid, and the intrinsic viscosity after solid phase polymerization is 0.78 dl / g.

[0037]According to DSC analysis, the crystallization exotherm was 2.2 J / g.

[0038] The preform produced by the injection machine has good transparency and no crystal whitening phenomenon; the preform can be stably made into a 5-gallon bottle after being stretched and blown, with good transparency and strength.

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Abstract

The invention refers to a prescription of poly-p-benzene di-methanoic acid diethyl ester (PET) polymer which applies to produce the bottle embryo of over 600 grams weight and over 7 cm thickness and the container the cubage over 10 liters, its main ingredients is poly-p-benzene di-methanoic acid diethyl (PET) resin and inter-benzene di-methanoic acid (IPA) which is based on X mol% polyester and diglycol (DBG) based on Y mol% polyester and the 2,6-dicarboxylic acid; X, Y, Z accords to: 2.5= C08G 63 / 183 0 7 1 2002 / 11 / 20 1405201 2003 / 3 / 26 1179999 2004 / 12 / 15 2004 / 12 / 15 2004 / 12 / 15 Nanya Plastic Industry Co., Ltd. Taiwan Jian Richun wu lei 11225

Description

technical field [0001] The invention relates to a formulation of polyethylene terephthalate (PET) copolyester. Background technique [0002] Along with the general attention of the public to the quality of drinking water, many public places or office places often use 5-gallon containers to hold distilled water for personnel to drink. Therefore, the market for large packaged drinking water is gradually increasing. [0003] At present, such large water containers are mainly made of polyvinyl chloride (PVC) or polycarbonate (PC). Among them, the PVC material container has been gradually replaced because it has no environmental protection value. Although PC containers have superior quality, the cost of raw materials is relatively high. [0004] The PET copolyester, which is widely used to make bottles for carbonated beverages, mineral water or tea beverages, usually contains 0 to 3 mole% m-phthalic acid based on copolyester or 1.5 to 3 mole% based on copolyester. 4.0mole% die...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D1/00C08G63/183
Inventor 简日春
Owner NANYA PLASTICS CORP
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