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Knitted heat-shrink tube and method for producing same

A technology of knitted fabric and circular weaving method, applied in the field of protective sleeve, can solve problems such as hindering the flexibility of the sleeve

Active Publication Date: 2015-11-18
法兰克管厂有限两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These seams also hinder the flexibility of the casing

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Knitted heat-shrink tube and method for producing same
  • Knitted heat-shrink tube and method for producing same

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] figure 1 A knitted fabric 10 produced on a circular loom is shown. The yarn 12 used to produce the knitted fabric 10 consists of two monofilaments of polyester each having a diameter of 0.18 mm and one multifilament of polyester having a diameter of 280 dtex. Considering 1.38g / cm 3 An effective filament diameter of 0.30 mm is obtained therefrom in the case of a specific weight of polyester.

[0026] The yarn is woven into a knitted sleeve 20 on a single-shuttle circular loom (see figure 2 schematic sketch of the ). The needles of the circular loom have a width of 0.90mm and a gauge of 2.65mm measured from needle center to needle center. After extraction from the circular knitting machine, the knitted sleeve has a diameter of about 30 mm in the unshrunk state. In the longitudinal direction L, the mesh rows M of the knitted fabric are arranged one above the other with a period p of about 0.9 mm. The grid period P in the circumferential direction U is about 1.8 mm, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a protective tube (20) which is produced in a circular knitting machine using heat-shrinkable yarn, and to a method for producing such a protective tube.

Description

technical field [0001] The present invention relates to a protective sleeve made from yarns that shrink when heated. Background technique [0002] It should already be noted in this context that the material property "shrinkable on heating" does not refer to the undesired shrinkage that is known from housework and that occurs, for example, when clothes made of plastic fibers are washed overheated. Rather, this material property refers to the desired shrinkage, which is known to those skilled in the art of heat-shrinkable sleeves, for example, for the insulation of electrical lines. In order to be able to provide this shrinkability, the plastic must be heated and expanded in the heated state. By subsequently cooling the plastic below its glass transition temperature, the plastic is virtually frozen when deformed back into the unstretched state. Upon reheating to a temperature above the glass transition temperature, the frozen stress is released and the material shrinks agai...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L47/22H02G3/04
CPCB60T17/043D04B1/225F16L57/02F16L57/06H02G3/0481F16L47/22H02G3/0406D10B2401/04D10B2505/12
Inventor P·比尔迈尔
Owner 法兰克管厂有限两合公司