JPH06331526A - Method for measuring drying characteristics of cloth - Google Patents

Abstract

PURPOSE:To measure dryness after moistening in a short time by dropping water on a glass plate, so placing cloth of moisture equilibrated state that the surface side in contact with the close is brought into contact with the glass, absorbing water, measuring the weight, and then measuring the drying time. CONSTITUTION:A testpiece is collected from cloth of a moisture equilibrated state, placed on a glass plate, and the weight is measured. Then, the testpiece is removed from the plate, and normal water is dropped at the center of the plate by using a micropipette. The testpiece is again so placed that the surface side in contact with skin is brought into contact with the plate, water is absorbed, and its mass is measured. Then, while the testpiece remains placed on the place, the weight change due to drying is calculated using a predetermined formula as a moisture content, assuming that the time required to obtain the fact that the weight becomes the same as that before absorbing the water until it is naturally dried in a test chamber of a standard state is a drying time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the drying property of cloth.

[0002]

2. Description of the Related Art Conventionally, there are JIS L-1096 A method and B method as a method for measuring the drying property of a cloth. In the A method, a test piece is immersed in water and sufficiently absorbed, and then it is removed from the water. There is a method of measuring the time from the time when the sample is pulled up and the water drops do not fall until it is naturally dried. In method B, the mass of the test piece before water absorption was weighed, and then it was immersed in water and allowed to absorb water sufficiently. After that, the method of measuring the mass after 10 minutes of pulling up from water to determine the amount of evaporative free water is performed.

Since these measuring methods are methods in which the cloth is immersed in water, the whole cloth is made to absorb water, and the water is dried from both sides of the cloth by hanging and drying, the dryness of clothes after washing is measured. However, to measure the dryness after wetting due to perspiration when wearing clothes, such as wetting from one side of the fabric and drying on the other side, wetting and drying of the fabric There is a problem that it is not suitable because the method is different.

According to the JISL-1096 A method, the cloth is dipped in water to absorb water sufficiently and then dried without being squeezed or dehydrated. Therefore, it takes a very long time to dry naturally. There is a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to objectively measure the dryness after being wet by perspiration when wearing clothes in a short time. It is intended.

[0006]

In order to solve such a problem, the inventors of the present invention contact one side of the cloth with water to absorb the water, and moisture diffusively dries from the other side.
The present invention has been achieved, focusing on the fact that the state is similar to wearing actual clothes.

That is, according to the present invention, water is dripped on a glass plate, the cloth in a water-balanced state is placed so that the surface side in contact with the skin is in contact with the glass plate to absorb water, and the mass is immediately measured, and then the cloth is measured. The gist of the present invention is to provide a method for measuring the drying property of a fabric, which is characterized in that the time required for the sample to be naturally dried in a standard test room while being placed on a glass plate is measured from the change in mass. Hereinafter, the present invention will be described in detail.

In the present invention, the cloth in the water equilibrium state means that the cloth is pre-dried at 40 ± 5 ° C., then 20 ± 2 ° C.
The cloth is left in a standard condition test room of 65 ± 2% RH to reach a constant weight.

10 cm x from the cloth in this water equilibrium state
3 pieces of 10 cm test piece are sampled, the test piece is placed on a glass plate of 10 × 10 cm, and the mass is measured. Then, the test piece is removed from the glass plate, and 0.2 cc of water specified in the chemical analysis method of JISK-0050 is dropped in the center of the glass plate using a micropipette. Place the test piece again on the glass plate so that the side that comes into contact with the skin comes into contact with the glass plate, absorb water,
Measure the mass. Then, with the test piece still placed on the glass plate, the time required for it to naturally dry in the test room under the standard condition is 10
Measure from the change in mass every minute.

The time when the mass of the test piece becomes the same as the mass before water absorption is called natural drying, and the time taken is measured as the drying time. The change in mass due to drying is calculated as the moisture content by the following formula, and is represented by the average value of three sheets. Moisture content (%) = (W _T −W ₀ ) / A × 100 ───── (1) W _T : Weight of test piece after absorption of water T minutes W ₀ : Weight of test piece before water absorption A: Drop Water mass

[0011]

[Production] As in the present invention, a method in which a cloth is placed on a glass plate on which water is dropped so that the surface side of the cloth contacting the skin is in contact with the glass plate to absorb water, and then the cloth is naturally dried with the cloth placed on the glass plate When the dryness is measured with, the fabric absorbs water from one side by contact and dries on the other side.
It becomes possible to measure the dryness of the cloth in a state close to the wetness of the clothes and the dryness of the sweat due to perspiration from the skin when the clothes are worn. Moreover, since the drying property can be measured with a very small amount of water droplets, the result can be obtained in a short time for the measurement.

[0012]

EXAMPLES Next, the present invention will be described more specifically by way of examples.

Example 1 As a sample for measurement, a double knitted fabric using a front yarn cotton yarn 60s and a back yarn cotton yarn 60s, and a cotton / nylon double knitted fabric using a front yarn cotton yarn 60s and a back yarn nylon filament 70d / 130f Two types of double-structured knit fabrics were used.

These fabrics were pre-dried at 40 ° C. for 30 minutes and then left overnight in a test room at 20 ° C. and 65% RH to adjust to a water equilibrium state. Three 10 cm x 10 cm test pieces were taken from the fabric adjusted to the water equilibrium state, and 10 cm x 1
It was placed on a 0 cm glass plate and the mass was measured.

Then, the test piece was removed from the glass plate, water was dropped on the central part of the glass plate with a 0.2 cc micropipette, and the test piece was placed on the glass plate so that the surface side contacting the skin again touched the glass plate to absorb water. Then, the mass was measured immediately.

After that, with the test piece placed on the glass plate,
The time required for the test piece to dry naturally in the test room in the standard state was measured from the change in mass every 10 minutes. The water content was calculated from the change in mass by the above-mentioned formula (1), and when the value reached almost 0, it was regarded as the natural dry state. The time required for drying is shown in Table 1 below.

For comparison with the method of the present invention, JISL-1096 (method A) using the above-mentioned two kinds of double-knit fabrics.
Based on the above, the time until natural drying was measured as follows.

First, three vertical and horizontal 40 cm × 40 cm test pieces were taken from the cloth adjusted to the water equilibrium state, and then,
Spread it in water at 20 ± 2 ° C, immerse it in water, let it sit overnight, let it absorb water sufficiently, and then pull it out of the water. After it has stopped falling, attach it to the drying time measuring device and let it dry naturally in the standard test room. Time was measured and the average value of 3 times was used. The results are shown together in Table 1.

[Table 1]

As is apparent from Table 1, the measurement method of the present invention can complete the measurement in a very short time before it is naturally dried as compared with the method of the comparative example.

[0020]

According to the present invention, it is possible to measure wetness and dryness of perspiration when wearing clothes by an objective method in a short time.

Claims (1)

[Claims] 1. Water is dropped on a glass plate, and the cloth in a water-balanced state is placed so that the surface side in contact with the skin is in contact with the glass plate to absorb water, and the mass is immediately measured. A method for measuring the drying property of a fabric, which comprises measuring the time until it is naturally dried in a test room in a standard state while being put on the cloth, by measuring the change in mass.