Polyester for heat shrinkable film and preparation method thereof

A heat-shrinkable film and polyester technology, applied in the direction of single-component polyester rayon, rayon manufacturing, textiles and papermaking, etc., can solve the problems of reducing polyester crystallinity, low shrinkage rate, and low shrinkage internal stress , to achieve the effect of reducing crystallinity, high shrinkage rate and high transparency

Pending Publication Date: 2021-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a polyester for heat-shrinkable film, which can effectively reduce the crystallinity of polyester by adopting the existing continuous polyester production line, and overcome the high Crystallinity, the shortcoming of low shrinkage rate due to low shrinkage internal s

Method used

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  • Polyester for heat shrinkable film and preparation method thereof
  • Polyester for heat shrinkable film and preparation method thereof
  • Polyester for heat shrinkable film and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0038]Example 1-5 Polyester with heat shrinkable film contains components: terephthalic acid, ethylene glycol, amphiminyldylene terephthalic acid, neutral hemata, cellulose ester and double (3,5-di-tert-di Single ethyl-4-hydroxybenzoate monhaletate) calcium salts, weight percentages of each component and trimmed to ethylene glycol, such as Table 1. The addition of catalyst ethylene glycol titanium and ethylene glycol ruthenium during the preparation of thermal shrink films The weight of the polyester of the heat shrink film is shown in Table 1.

Example Embodiment

[0039]Example 6-10 Polyester with a heat shrinkable film contains components: terephthalic acid, ethylene glycol, sunflower acid, hexanedate, cellulose ester and double (3,5-di-tert-butyl) 4-hydroxybenzoate monhaletate) calcium salts, weight percentage of each component and a trim of terephthalic acid to ethylene glycol, such as Table 2. The amount of the addition of catalyst ethylene glycol titanium and ethylene glycol ruthenium during the preparation of the preparation of the thermal shrink film is shown in the weight percent of the total amount of the polyester of the heat shrink film.

[0040]Example 1-5 Preparation of polyester for heat shrinkage film includes: ethylene glycol, ethylene terephthalic acid, ethylene glycol, amphimic acid, neitzylene glycol and concentration of 0.5% by weight according to Table 1 ratio The titanium oriel glycol solution is added to the slurry mix tank 1 for the slurry, and the esterification kettle 6 is entered by the slurry supply groove 2;

[0041]The...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to polyester for a heat shrinkable film and a preparation method of the polyester, and the polyester for the heat shrinkable film comprises dicarboxylic acid, aliphatic diol, a hydrophilic modifier, an antioxidant heat stabilizer, terephthalic acid and ethylene glycol or terephthalic acid derivatives and ethylene glycol. The preparation method comprises the following steps: uniformly mixing terephthalic acid, ethylene glycol, dicarboxylic acid, aliphatic diol and a titanium catalyst, inputting into a first reactor, and carrying out esterification reaction to generate an ester; mixing a hydrophilic modifier, an antioxidant heat stabilizer, an antimony catalyst and the ester, and performing esterification and pre-polycondensation to obtain a prepolymer; and carrying out condensation polymerization on the prepolymer to obtain the heat-shrinkable polyester. The heat-shrinkable polyester prepared by adopting a continuous polyester process production line effectively reduces the crystallinity of the polyester, has the advantages of high heat resistance, antistatic property, high shrinkage rate, high degradation resistance, high transparency and the like, and is simple and easy to control, low in equipment requirement, energy-saving and emission-reducing, and good in prospect.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a polyester used for heat-shrinkable films and a preparation method thereof. Background technique [0002] PET polyester is a crystalline polymer, and the thermal shrinkage rate of fibers obtained by spinning or uniaxially stretched film is relatively low in the later stage. Even after special processing, only a thermal shrinkage rate of less than 30% can be obtained. In order to prepare fibers or films with high shrinkage rate, ordinary polyester needs to be modified by copolymerization. After copolymerization, the thermal shrinkage rate of fibers can reach more than 50%, and the highest thermal shrinkage rate of films can reach more than 70%. Copolymerization modification is mainly to add the third component or even the fourth component to participate in the copolymerization, change the regularity of the polyester chain segment, and make it produce an asymmet...

Claims

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Application Information

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IPC IPC(8): C08G63/181C08G63/183C08G63/78C08G63/85C08G63/86D01F1/10D01F6/92D04H3/011
Inventor 刘春秀沈伟李华任明利张林春高冰冰王伟程川
Owner CHINA PETROLEUM & CHEM CORP
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