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Ethylene copolymer modified oriented polyester films, tapes, fibers and nonwoven textiles

A technology of copolymers and textiles, applied in the direction of single-component polyester artificial filaments, etc., can solve problems such as reduction in elongation, loss of physical properties, and difficulty in achieving goals for polyester compositions

Inactive Publication Date: 2007-01-17
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It is difficult to achieve the above goals with conventional polyester compositions for the production of films and fibers
Higher elongation and reduced denier can lead to unacceptable loss of physical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0134] Plaques were prepared to determine the tensile properties of the polyester compositions to evaluate their stretchability at 180°C (a temperature commonly used to stretch PET compositions in industrial equipment to make fibers, slit tapes or bioriented films).

[0135] materials used

[0136] PET-1: PET homopolymer with intrinsic viscosity (IV) of 1.0 (high viscosity), DEG: 12000 mg / kg, acid end groups: 40 mg / kg, purchased as BGDQ from AKZO.

[0137] EMA-1: Ethylene / Alkyl Acrylate Copolymer, 24% by weight methyl acrylate, MI 2g / 10min (ASTM D-1238, 190°C, load 2.16Kg).

[0138] Resin preparation:

Embodiment 1

[0140] Embodiment 1: PET-1 (95%)+EMA-1 (5%)

Embodiment 2

[0141] Embodiment 2: PET-1 (90%)+EMA-1 (10%)

[0142] Plates were made by compression molding on a Collin press using the following conditions:

[0143] Preheating: 4 minutes at 270°C and 10 bar pressure,

[0144] Heating: 2 minutes at 270 °C and 150 bar pressure,

[0145] Board size: 150×150×2mm.

[0146] Tensile properties were measured according to ASTM 1708 at 180°C (20 measurements per blend).

[0147] Example

[0148] These test results demonstrate that the addition of 5-10% ethylene / alkyl acrylate copolymer to polyester improves the mechanical properties (such as tensile strength and elongation at break) of the polyester composition. Based on these results, we anticipate the fabrication of tapes, fibers or bioriented films with highly enhanced stretchability in production facilities.

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PUM

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Abstract

Disclosed are films, tapes, and melt-spun fibers prepared from compositions comprising (a) at least one polyester polymer; and (b) from about 1 to 30 weight % of at least one ethylene copolymer such as ethylene / vinyl acetate dipolymers, ethylene / vinyl acetate terpolymers, ethylene / alkyl (meth)acrylate dipolymers, ethylene / alkyl (meth)acrylate terpolymers, functionalized ethylene copolymers, ethylene / acid copolymers, and salts thereof. The films, tapes and fibers exhibit improved tensile properties such as tensile strength and elongation at break compared to nonmodified polyester compositions. Also disclosed are textiles and articles prepared from the fibers described.

Description

technical field [0001] The present invention relates to films, tapes and fibers comprising or prepared from polyester blends modified with ethylene copolymers, and to films, tapes and fibers comprising said modified polyesters. Spun fibers or non-woven textiles prepared from melt-spun fibers containing the modified polyester. Background technique [0002] Oriented films comprising polyesters can be prepared using molten polymers by a variety of methods known in the art (eg, cast film extrusion or blown film extrusion). The film can be oriented in one direction by thermally stretching in the machine direction and annealing using a stretching device. Films can also be oriented in two directions (machine and transverse) using suitable stretching equipment. Oriented polyester films are useful in a variety of packaging applications. [0003] Likewise, various tapes can be prepared from extruded polyester films. Flat films can be quenched by extrusion ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L67/00D01F6/92
Inventor L·P·罗兰S·L·萨米尔斯
Owner EI DU PONT DE NEMOURS & CO
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