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Study On Testing Method For Content Of Cotton / Stainless Steel Fiber Blended Radiation Protection Fabric

2011/5/10 14:15:00 110

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Stainless steel fiber blended anti radiation fabric is made of stainless steel.

fibre

The fabric blended with other common fibers such as polyester and cotton is widely used in electromagnetic radiation maternity and professional wear.

There is no uniform test method to test the composition of the fabric.

market

The identification of such products is fraudulent and serious, so it is necessary to study suitable for such products.

Fabric

Test method for the content of ingredients.

Because stainless steel fibers react with acids and bases under certain conditions, conventional chemical acid-base dissolution cannot be adopted.

This article is based on cotton.

The composition of stainless steel fiber blended fabric was tested by combustion method.

One

Feasibility test analysis

Ordinary textile fibers are generally combustible, while stainless steel fibers are not combustible. Therefore, combustion method is used to test the fabric.

Take some cotton

Stainless steel fiber blended yarn is fully burned and washed after residue.

Five hundred

Double micrograph (3D video microscope)

KH-1000

(Figure)

One

It is shown.

chart

One

cotton

Residues of stainless steel fiber blended yarn after full combustion

It can be seen from the diagram that after the yarn is fully burned, the cotton components are removed and the remaining stainless steel fibers are left. Therefore, the combustion method can be used for the determination of cotton.

Composition of stainless steel fiber blended anti radiation fabric.

Two

Analysis of factors affecting testing

Two point one

Experimental study on quality change and correction coefficient of stainless steel fiber

Due to the oxidation of stainless steel fibers and the attachment of cotton ashes after the burning of blended yarns, it is necessary to study cotton with different mixing proportions through experiments.

The quality modification coefficient of stainless steel fiber sample is determined after burning the quality of stainless steel fiber.

2.1.1

Testing instruments and materials

Instrument: electronic balance (accuracy:

0.01g

), oven, beaker, tweezers, etc.

Material: single fiber diameter is

6 mu m

The brand name is

316L

The stainless steel fiber is composed of fiber bundles and cotton fiber bundles.

2.1.2

test method

Take some quantitative stainless steel fibers and weigh them with electronic balances.

They were mixed with cotton fibers in different proportions and made into small fiber bundles.

Fully burning small fiber bundles and gently washing and drying, after cooling it is called dry weight after combustion.

_One

;

By formula (

One

Calculation of mass correction factor for stainless steel fiber

;

Different cotton

The mass change and correction coefficient of stainless steel mixture ratio before and after combustion are shown.

One

It is shown.

surface

One

Different cotton

Quality change and correction factor of stainless steel mixture before and after combustion

Stainless steel fiber content

Dry weight of stainless steel fiber bundles before combustion

M/g

Dry weight of stainless steel fiber bundles after combustion

_One

? M= M

_One

-M (g)

correction factor

Average correction coefficient

Ten

Four point six eight

Four point seven two

Zero point zero four

Zero point nine nine one

Zero point nine nine three

Twenty

Nine point seven three

Nine point eight zero

Zero point zero seven

Zero point nine nine three

Thirty

Eight point eight eight

Eight point nine five

Zero point zero three

Zero point nine nine two

Forty

Seven point six nine

Seven point seven five

Zero point zero six

Zero point nine nine two

Fifty

Three point one zero

Three point one two

Zero point zero two

Zero point nine nine three

Sixty

Eight point nine two

Eight point nine nine

Zero point zero seven

Zero point nine nine two

Seventy

Five point five eight

Five point six three

Zero Point Zero Five

Zero point nine nine one

Eighty

Eight point one six

Eight point two two

Zero point zero six

Zero point nine nine three

Ninety

Six point seven six

Six point eight three

Zero point zero seven

Zero point nine nine zero

One hundred

Two point nine nine

Three point zero one

Zero point zero two

Zero point nine nine two

It can be seen from the above table: the quality of stainless steel fiber after burning is inferior to that before combustion.

All greater than

Zero

Description of different cotton

The quality of the remaining stainless steel fibers after combustion increased with the mixing ratio of stainless steel fibers.

Ten

individual

The results are very close. This shows that the oxidation of stainless steel fibers and the attachment of ash after burning of different cotton fibers are close to the experimental results. It is considered that the average correction coefficient should be applied to all the yarns with different blending ratios to reduce the revision workload.

Values are all there.

Zero point nine nine zero

The above shows that the combustion method has little effect on the quality change, so the quality can be corrected under the general test accuracy requirement, but if the high precision measurement is needed, the quality can be corrected to get the corrected quality of the stainless steel fiber.

_Two

Use

_Two

Calculate the content.

Know from table

Value is

Zero point nine nine three

The formula for mass correction is as follows.

Two

)

Two point two

The influence of stainless steel fiber on the state

cotton

After the direct combustion of stainless steel fiber blended yarn, the remaining stainless steel fiber structure is loose, and it is easy to fall off when washing, resulting in the reduction of the quality of the stainless steel fiber. Therefore, it is necessary to study the difference of the quality of the stainless steel fiber in two situations: the burning blended yarn and the blended fabric.

2.2.1

test method

Weigh two copies with an electronic balance.

5 g

Cotton

Stainless steel fiber blended anti radiation fabric

(14.5 tex x 14.5 Tex)

One of the fabric samples is dismantled and the other is not processed.

The two samples were fully burned, and the residue was lightly washed and dried. After cooling, the dry weight of the yarn was weighed separately.

_Three

And fabric residue dry weight

_Four

;

The tests of the two samples were done five times, and the average value was calculated.

_Three

_Four

。

The average dry weight of the two samples after combustion is pictured.

One

It is shown.

chart

One

Dry weight after combustion

It can be seen from the diagram that after burning, the quality of the remaining stainless steel yarns is smaller than that of the fabrics.

The analysis shows that when the direct combustion blended yarn is made, the residual stainless steel fiber is thinner, and the quality of the stainless steel fiber decreases when washing is easy to fall off. When testing the fabric burning method, the stainless steel fiber shedding less under the restriction of weaving resistance.

According to the calculation, the content of stainless steel fiber obtained by burning blended yarn under the above experimental conditions has been generated.

11%

The above average deviation.

Therefore, the method of fabric burning should be used to improve the accuracy of test data.

Two point three

Study on sampling volume

Because of the poor spinnability and high density of stainless steel fibers, the blending uniformity of the stainless steel fibers is poor, leading to the larger discreteness of the test results.

The composition distribution of the finished products is quite discrete, so the quantity of the experimental sample can not be simply applied to the standard, but it is necessary to get the result through experimental analysis.

2.3.1

Test procedure:

One

In cotton

Stainless steel fiber blended anti radiation fabric is randomly sampled at different positions to cut the fabric into weight.

2.1 G

4.3 G

6.1 G

8.4 G

10.2 G

12.3 G

14.4 G

16.2 G

Some samples;

Two

Put the sample into the sample.

103 degrees C

The oven is dried and weighed, and the dry weight of the sample is set.

_Zero

;

Three

The alcohol is used to burn the samples separately until the gray and soft metal mesh is present. The residual fiber net is washed and dried, and then cooled and weighed.

The weight of the residue after combustion is obtained.

_One

Using the mass correction coefficient.

The quality correction is made from the formula.

(2)

The quality of stainless steel metal fiber is obtained.

_One

That is

Zero point nine nine three

_One

;

Four

The percentage of stainless steel fiber content is

_One

According to the formula (

Three

Calculation.

Table 2 Determination of stainless steel fiber in cotton / stainless steel fiber blended fabric

Dry weight of blended fabric /g

Percentage of stainless steel fiber% /%

Two point one

Eighteen

Four point three

Twelve point five

Six point one

Seventeen point one

Eight point four

Sixteen point three

Ten point two

Fifteen point four

Twelve point three

Fifteen point two

Fourteen point four

Fifteen

Sixteen point two

Fifteen point one

According to table 2, when the sample size is small, the percentage of stainless steel fiber fluctuates greatly, and when the sample volume is above 10g and above, the percentage value of stainless steel fiber is stable near 15%. Therefore, it is suggested that the sampling volume is larger in the process of making the sample, and the sample should be not less than 10 g.

Three

cotton

Composition test of stainless steel fiber blended anti radiation fabric

Based on the above experimental results, the testing methods of cotton / stainless steel fiber blended anti radiation fabric can be summarized as follows:

The experiment was carried out according to the operation steps of 2.3.1, and the sampling volume of step 1 should be no less than 10 g, and the number of experiments should be set at 5 times.

The percentage of dry weight of stainless steel fibers was calculated by step 4).

_One

Then calculate the percentage of dry weight of cotton fiber.

P
_Two

。

5 experiments were carried out, and the average dry weight percentage of each component of the cotton / stainless steel fiber blended fabric was obtained by averaging the experimental results.

According to the above procedure, the cotton / stainless steel fiber blended radiation protection fabric produced by Shanghai sang Wei Textile Technology Co., Ltd. (yarn density 14.5 texX 14.5 tex, fabric density 460X320) was measured. The percentage of dry weight of each component in the blended fabric was shown in the following table.

Table 3 component content of cotton / stainless steel fiber blended radiation protection fabric

Sample number

Dry weight of blended fabric samples /g

Percentage of dry weight of stainless steel fiber

P
_1/

Percentage of dry weight of cotton fiber

P
_2/

One

Twelve point seven

Fifteen point two

Eighty-four point eight

Two

Eleven point one

Fourteen point eight

Eighty-five point two

Three

Sixteen point four

Fifteen point four

Eighty-four point six

Four

Fifteen point seven

Fifteen

Eighty-five

Five

Ten point one

Fourteen point six

Eighty-five point four

By calculation, we know that

_One

= "15%, `P

_Two

= "85%, that is, the percentage of dry weight of stainless steel fiber in the cotton / stainless steel fiber blended fabric is 15%, and the net dry weight percentage of the cotton component is 85%.

Four

conclusion

1) through experiments, it is feasible to determine the composition of cotton / stainless steel fiber blended fabric by combustion method.

2) after the burning of the blended yarns, the stainless steel fibers will oxidize and have cotton ashes attached. All these factors have certain effects on the test results, but the effect is very small. No correction is required in the general accuracy requirement. If we want to get the high precision test results, we can calculate the correction coefficient to correct the quality.

3) using the method of burning blended yarn to test the content of stainless steel fiber will produce greater error. In actual testing, the method of burning fabric should be used.

4) in the cotton / stainless steel fiber blended anti radiation fabric, the mixing uniformity of the stainless steel fiber is poor. The amount of sampling used in this experiment should be greater than 10 g. In actual work, for different conditions of fabrics, it is suggested that the actual test should be carried out according to the research method in this paper to determine the size of the sample.

5) the test method is to sample the fabric randomly, fully burn the sample, then gently wash and dry it, then weigh it after cooling, and calculate the content of each component in the blended fabric.

6) the composition test of stainless steel fiber blended fabric with 3 or more blend components can also be studied by the method of this paper.