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Method for predicting heat protection performance of fabric

A heat protection and fabric technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of high energy consumption, long test process, and environmental pollution, shorten the test process and time, and achieve accurate results Effect

Active Publication Date: 2015-04-08
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the long test process, high energy consumption and environmental pollution in the preparation of thermal protection fabrics in related technologies, at present, numerical methods are used to study the heat transfer of fabrics at home and abroad, and fabrics are often regarded as homogeneous flat plates, which affects the accuracy of simulation results, etc. problem, the object of the present invention is to provide a method for predicting the thermal protection performance of fabrics to solve at least one of the above problems

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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  • Method for predicting heat protection performance of fabric
  • Method for predicting heat protection performance of fabric
  • Method for predicting heat protection performance of fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example provides a method for predicting fiberglass twill fabrics.

[0031] 1. Test the geometric structure parameters and physical properties of fibers, yarns and fabrics in the twill fabric to be tested.

[0032] According to known national standards, the fabric fiber has a diameter of 9 μm and a density of 2.34×10 3 kg / m 3 , surface area 6.3585×10-11 m 2 Utilize the optical electron microscope test to obtain that warp yarn width 0.678mm, height 0.402mm, spacing 0.717mm and cross-section shape are ellipse, and weft yarn width 0.716mm, height 0.413mm, spacing 0.704mm and cross-section shape are oval (see figure 1 (a)), yarn linear density 2.8×10 -4 kg / m, the number of fibers contained in a single yarn is 1.8×10 3 root; according to the characteristics of the interweaving path of the yarn, the fabric weave is determined to be 3 / 1 twill, and the fabric thickness obtained by the test is 0.906mm.

[0033] 2. Use the fabric modeling software TexGen (texgen-bundle-...

Embodiment 2

[0039] This example provides a method for predicting fiberglass plain weave fabrics.

[0040] 1. Test the geometric structure parameters and physical properties of fibers, yarns and fabrics in plain weave fabrics.

[0041] According to known national standards, the fabric fiber has a diameter of 9 μm and a density of 2.34×10 3 kg / m 3 , surface area 6.3585×10 -11 m 2 Utilize the optical electron microscope test to obtain warp yarn width 0.37mm, height 0.29mm, spacing 0.44mm and cross-sectional shape are convex lens shape, weft yarn width 0.39mm, height 0.27mm, spacing 0.52mm and cross-sectional shape are oval (see figure 1 (a)), yarn linear density 2.8×10 -4 kg / m, the number of fibers contained in a single yarn is 1.8×10 3 root; according to the characteristics of the interweaving path of the yarn, the fabric weave is determined to be plain weave, and the thickness of the tested fabric is 0.74mm.

[0042] 2. Use TexGen (texgen-bundle-64bit-3.6.0 version) software to build...

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 discloses a method for predicting heat protection performance of fabric. The method includes building a three-dimensional geometrical model of the fabric based on the geometrical structure and the interweaving route of yarns, studying the transfer process of heat in the fabric on the basis and predicting the heat protection performance of the fabric. Compared with the prior art, the heat transfer process in the fabric is studied based on the three-dimensional geometrical model of the fabric, the result is more accurate compared with the existing method that the fabric is seen as a uniform flat plate, two concepts of the fabric domain and the air domain are provided innovatively, the effect of air components in the fabric unit model on heat transfer is fully considered, and the prediction result is closer to the actual condition. By means of popularization of the method for predicting heat protection performance of the fabric, the manufacturing and evaluating of the heat protection fabric are facilitated, test flow and time can be reduced, and energy saving and emission reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of textile testing, in particular to a method for predicting the thermal protection performance of fabrics. Background technique [0002] Textile materials play an important role in people's production and life because of their soft texture, light weight, high strength, and easy processing into desired shapes and sizes. Thermal protection fabric is a very important category of textile materials. It can not only protect the human body from damage in high temperature environments, but also is widely used as facility protection in industrial fields. For example: heat insulation, thermal insulation materials, and brake friction linings for aerospace and aviation industries; high temperature insulation and heat preservation for petrochemical equipment, containers, and pipelines; heat shields for automobile engines, wrapping for exhaust pipes of heavy oil engines, high-speed Composite brake friction pads for raci...

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): G06F17/50
Inventor 郑振荣赵晓明韩昌张玉双
Owner TIANJIN POLYTECHNIC UNIV
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