Mixed thermoplastic polyester and thermal-shrinkage double pipe therefrom

A thermoplastic polyester and heat-shrinkable sleeve technology, which is applied in the field of mixed thermoplastic polyester and heat-shrinkable sleeves made of this polyester, can solve the problems of undisclosed, expensive, etc., and achieve a perfect appearance without defects Effect

Active Publication Date: 2009-09-23
NANYA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The U.S. Patent No. 5,718,953 uses polyphenylene sulfide to manufacture heat-shrinkable sleeves. Although it has good heat aging resistance, it is expensive
[0010] However, none of the above-mentioned prior art discloses the technology and advantages of mixing poly(trimethylene terephthalate) into the polyester material to make a heat-shrinkable sleeve

Method used

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  • Mixed thermoplastic polyester and thermal-shrinkage double pipe therefrom
  • Mixed thermoplastic polyester and thermal-shrinkage double pipe therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Take 5 parts by weight of polyester A1 and 95 parts by weight of polyester B2, use stirring and mixing equipment to make them evenly mixed, dry the thermoplastic polyester pellets in this mixed state with dehumidified air at 150 ° C for 4 hours, and use an extruder Melt and extrude at 250-270°C, and pass through a ring-shaped die to make a hollow cylindrical unextended original tube, and the original tube is immediately cooled by a cooling water tank, and then, using a set of speed settings The 100rpm feed roller (Feed Roller) makes the original pipe pass through the heater, and when the temperature of the original pipe reaches 90-100°C, pressurized air is introduced to blow and expand the original pipe to a sleeve that is more than 1.3 times the diameter of the original pipe. The expanded tube is pulled out by a set of nip rollers with a rotational speed set at 105 rpm, thus making a heat-shrinkable tube.

[0071] Next, a series of tests were carried out on the heat-sh...

Embodiment 2

[0076] As in Example 1, but the polyester A1 of 95 parts by weight and the polyester B2 of 5 parts by weight are taken, the results are shown in Table 1.

Embodiment 3

[0078] As in Example 1, but get 5 parts by weight of polyester A2 and 95 parts by weight of polyester B3, the results are shown in Table 1.

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Abstract

A heat-shrinkable tube is made of a novel thermoplastic polyester blend which comprises component (A) from 5 to 95 wt %, based upon the total weight of components (A) and (B), of homopolymerized or copolymerized polyethylene terephthalate (PET) with an intrinsic viscosity of from 0.8 to 1.2 dl / g; and component (B) from 95 to 5 wt %, based upon the total weight of components (A) and (B), of polytrimethylene terephthalate (PTT) with an intrinsic viscosity of from 0.8 to 1.2 dl / g; and the heat-shrinkable tube after heating in hot water has a shrinkage from 5% to 15% in machine direction (MD) and a shrinkage greater than 35% in transverse direction (TD).

Description

technical field [0001] The invention relates to a mixed thermoplastic polyester and a heat-shrinkable sleeve made of the mixed thermoplastic polyester, especially, the heat-shrinkable sleeve made of this has proper heat shrinkage after heat treatment. High efficiency, good heat resistance, chemical resistance and heat aging resistance; after the heat shrinkable sleeve is wrapped on the surface of the object, and then heated at a high temperature, it can still remain tightly attached to the coated object without expansion and relaxation. Spots or wrinkles, etc., so the heat shrinkable sleeve can provide insulation, protection, beautiful decoration or labeling for the covered object. [0002] Therefore, this heat-shrinkable sleeve is particularly suitable for electrical insulation, for example, for the insulation of electronic and electromechanical components such as batteries, capacitors, or electrical panels. Background technique [0003] The common electrical insulation he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/181C08L67/03C08K3/36B29C49/08B29C49/78B29C49/04B29D23/00C08K3/26C08K3/30B29C48/325
CPCC08J5/00C08J2300/22C08K3/016C08K5/0066C08L67/03C08L2201/22C08L2205/02
Inventor 简日春
Owner NANYA PLASTICS CORP
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