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Polyester for hydrolysis-resistant high-speed-spun spunbonded non-woven fabric and synthesis method thereof

A synthesis method and non-woven fabric technology are applied in the field of polyester for hydrolysis-resistant high-speed spunbond non-woven fabric and its synthesis, which can solve the problem of easy hydrolysis of polyester, reduce the content of terminal carboxyl groups, increase viscosity, and increase fiber powerful effect

Inactive Publication Date: 2017-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] In order to solve the problem of easy hydrolysis of polyester and increase the spinning speed on the basis of existing spunbond equipment, the invention provides a hydrolysis-resistant high-speed spunbond nonwoven polyester and its synthesis method

Method used

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  • Polyester for hydrolysis-resistant high-speed-spun spunbonded non-woven fabric and synthesis method thereof
  • Polyester for hydrolysis-resistant high-speed-spun spunbonded non-woven fabric and synthesis method thereof
  • Polyester for hydrolysis-resistant high-speed-spun spunbonded non-woven fabric and synthesis method thereof

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Embodiment 1-8

[0026] Add terephthalic acid and ethylene glycol in proportion to the slurry mixing tank with stirring, after the titanium-based catalyst (titanium glycolate) enters the preparation area, add ethylene glycol to dilute the catalyst concentration to 0.04wt% , after being prepared, it is transported to the slurry blending tank to participate in the slurry preparation, and after being metered through the slurry supply tank, it is quantitatively and continuously sent to the horizontal belt stirring esterification reaction kettle with a gauge pressure of 0.08-0.12MPa and a temperature of 230 Stir at -265°C for esterification to produce the intermediate bishydroxyethyl terephthalate, react until the esterification rate is at least 92%, the water generated during the esterification process is distilled out with ethylene glycol, and the water is separated through the fractionating tower Finally, 99 wt% of ethylene glycol is refluxed in the kettle, and the residence time of the esterific...

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Abstract

The invention discloses polyester for a hydrolysis-resistant high-speed-spun spunbonded non-woven fabric and a synthesis method thereof. The polyester for the hydrolysis-resistant high-speed-spun spunbonded non-woven fabric is prepared by PTA and EG low temperature esterification by using a Ti-Sb composite catalyst, adding a hydrolysis-resistant monomer and an inorganic additive for supplementing spun-bonding high-speed high-ratio stretching, and adding an anti UV agent for pre polycondensation and final polycondensation reaction, and the polyester for the hydrolysis-resistant high-speed-spun spunbonded non-woven fabric has the intrinsic viscosity of 0.68-0.72 dl / g, the end carboxyl group content of 28-34 mmol / t, the DEG content of less than 0.8%, the melting point of higher than 260 DEG C, the water content of less than 0.1%, the powder content of less than 0.01%, the ash content of less than 0.01% and the suitable spinning stretching speed of 5000-6000 m / min.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a hydrolysis-resistant high-speed spun-bonded nonwoven polyester and a synthesis method thereof. Background technique [0002] Polyester (polyethylene terephthalate, PET) is polymerized from terephthalic acid (PTA) and ethylene glycol (EG). It has excellent mechanical, physical and chemical properties, and good processing properties. It is widely used in the production of fibers, films, resins and other molded products. However, because the polyester end group is sensitive to water vapor, especially in high temperature and humid environment, it has poor hydrolysis resistance, and is easily hydrolyzed by the catalysis of its residual terminal acid group, resulting in the deterioration of mechanical properties and other properties, which largely limits its use. Application in industry. In general, the higher the carboxyl group content of the polyester, the worse the hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/692C08G63/85
Inventor 朱刚林永明沈伟任明利陆慧良周向群林雪梅郭永林董艳
Owner CHINA PETROLEUM & CHEM CORP
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