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Indirect test evaluating method for hollowness of bombax cotton fiber

A technology of kapok fiber and evaluation method, which is applied in the direction of applying stable tension/pressure to test the strength of materials and the preparation of test samples, which can solve the problems of long time consumption, complicated operation of the test process, and inability to guarantee the secondary deformation of kapok fiber, etc. , to achieve the effect of avoiding secondary deformation

Inactive Publication Date: 2012-06-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is difficult to directly or indirectly test and evaluate the hollowness of kapok fibers with existing testing techniques.
If the fiber sample is directly removed from the product, and the hollow structure of the kapok fiber is observed with a biological microscope or an electron microscope, not only is the test process more complicated and time-consuming, but it is impossible to guarantee that the kapok fiber, which is easily deformed, will remain intact during the test operation. No secondary deformation

Method used

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  • Indirect test evaluating method for hollowness of bombax cotton fiber
  • Indirect test evaluating method for hollowness of bombax cotton fiber
  • Indirect test evaluating method for hollowness of bombax cotton fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 (dry kapok raw cotton and its fiber hollowness test evaluation after wet pressure treatment)

[0030] (1) Sample preparation: After dry kapok (humidity adjustment for 24 hours in an environment with a relative humidity of 15%) and humid pressurization treatment (humidity adjustment in an environment with a relative humidity of 99% for 24 hours, and then a pressure of 100KPa for 15 seconds) 10 samples of kapok fiber bundles were made in each of the fibers, and each sample was combed in parallel to determine the weight of 100mg, and placed in a rectangular container of 3cm×3cm;

[0031] (2) Test method: use a compression performance tester to test in a constant temperature and humidity room, and the pressure head is 5cm in area 2 The circular indenter, with 0.2mm·s -1 Press vertically to the sample at a constant speed, return at the original speed after the test pressure reaches 50Pa, and measure the relationship between the pressure per unit area of ​​the f...

Embodiment 2

[0036] Embodiment 2 (the hollowness test evaluation of dry kapok and moist micro-pressed kapok fiber)

[0037] (1) Sample making: each make 10 kapok fibers from the fibers of dry kapok (same as embodiment 1) and wet kapok (humidity adjustment in 99% relative humidity environment for 24 hours, then continue to act for 15 seconds with a pressure of 10KPa) Beam sample, preparation method is with embodiment 1;

[0038] (2) Test method: use a compression performance tester to test in a constant temperature and humidity room, and the pressure head is 2cm in area 2 The circular indenter, at 0.5mm·s -1 Press vertically to the sample at a constant speed, return at the original speed after the test pressure reaches 50Pa, and measure the relationship between the pressure per unit area of ​​the fabric and the thickness of the compressed sample;

[0039] (3) Index calculation and result analysis: See the first two rows of Table 2 for the index calculation results, and the last row of Tab...

Embodiment 3

[0045] Embodiment 3 (hollowness test evaluation of kapok blended fabric)

[0046] (1) Sample production: use 21s cotton air-jet yarn as the warp yarn, and the weft yarns are 20s of 80% cotton / 20% kapok yarn and 100% cotton yarn respectively, weave plain weave fabric with warp and weft density (246×218) per 10cm, And the finishing process after the front sanding. Cut 3 pieces of flat fabric samples with a size of 20cm×20cm at different positions;

[0047] (2) Test method: the same as in Example 1, but the constant speed at which the indenter of the compression performance tester presses vertically to the sample should be set at 0.05 mm s -1 ;

[0048] (3) Index calculation and result analysis: the index calculation results are shown in the first two rows of Table 3, and the test results of the significance of the performance difference between kapok blended fabric and cotton fabric are shown in the last row of Table 3. There are significant differences in the four major indica...

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Abstract

The invention relates to an indirect test evaluating method for the hollowness of a bombax cotton fiber. The indirect test evaluating method comprises the following steps of: manufacturing corresponding samples according to the shapes and types of products; testing by use of a compression tester of a fibrous material, measuring a relation curve of pressure and the thickness of the samples in a compression process and a relation curve of pressure and the thickness of the samples in a reset process to obtain a characteristic index so as to evaluate the hollowness state of the fiber; and carrying out calculation and result analysis according to the characteristic index. According to the indirect test evaluating method disclosed by the invention, on the premise of not breaking the original structure of product, compressible thickness and filling power are converted by directly testing the compression performance index of the bombax cotton fiber so that the hollowness state of the bombax cotton fiber in the product is indirectly and effectively evaluated. The indirect test evaluating method disclosed by the invention not only is simple, easy and feasible, but also can be used for avoiding the secondary deformation of the hollow structure of the bombax cotton fiber caused by a section observation method.

Description

technical field [0001] The invention belongs to the technical field of kapok raw materials and products thereof in the textile industry, and in particular relates to an indirect test and evaluation method for the hollowness of kapok fibers. Background technique [0002] As an environmentally friendly green ecological fiber material, kapok has a unique thin-walled large hollow shape structure, with a hollow rate as high as 80%-90%; and it has light weight, water repellency, warmth retention, antibacterial and mite repellent, moisture absorption and antistatic, etc. Many natural excellent properties have good application prospects. [0003] The existing research results mainly focus on the processing technology of kapok fiber and its basic properties (morphological structure, fiber length, linear density, strength, kapok textile properties, etc.) under the standard environment. During the processing and use of kapok fiber, many external environments, such as heat and humidity...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N1/28
Inventor 王府梅严金江房超
Owner DONGHUA UNIV
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