JPH04194073A - Method for migration fastness test for finished cloth and apparatus therefor - Google Patents

Abstract

PURPOSE:To enable the migration fastness test of a finished cloth under a condition close to the wearing condition or storage condition in a warehouse with a simple apparatus in high workability by contacting a white cloth to the measuring surface of a finished cloth and leaving standing in vacuum at a specific temperature for a prescribed period. CONSTITUTION:The measuring face of a finished cloth is made to contact with a white cloth and introduced into a chamber containing a hot plate. A vacuum pump connected to the chamber is driven to evacuate the chamber and the finished cloth and attached white cloth are maintained under a condition close to the wearing condition or storage condition in a warehouse (i.e., 20-80 deg.C) for 0.5-20 hr. The finished cloth and the white cloth are taken out of the chamber and the extent of the dye, etc., transferred to the white cloth and the degree of discoloration or color fading of the finished cloth are measured to determine the fastness.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a fastness test method and method suitable for testing the fastness of various processed fabrics against migration of dyes, yellowing substances, etc. Regarding equipment.

(Prior art) The method for testing the sweat fastness of printed or dyed fabrics is the JIS L 0848A method in the Japanese Industrial Standards.

They are defined as Law B, Law C, and Law D. For example, in the case of method A, a test piece with a size of 5 cm x 5 cm is sandwiched between two attached white cloths of the same size to form a composite test piece, and this composite test piece is placed in an acidic artificial juice solution and an alkaline artificial juice solution. Soak for 30 minutes.

Squeeze out excess test solution until it no longer drips.
The specimen was sandwiched between glass plates, a load of approximately 4.5 kgf was applied, and the specimen was dried for 4 hours at 37°C. After that, the discoloration and fading of the specimen and the contamination of the attached white cloth were determined according to 10. of JIS L0801. It is determined based on the following.

In addition, the method for testing the color fastness of printed or dip-dyed fabrics against sublimation during storage is specified in JIS L in the Japanese Industrial Standards.
It is stipulated as Act 0854.

a Physically, a test piece with a size of 6 cm x 6 cm is
Sandwich it between two pieces of attached white cloth of the same size to make a composite test piece, sandwich it between a metal plate, and weigh approximately 4.5 kg.
After applying a load of
0801-10. It is determined based on the following.

On the other hand, testing methods for the fastness of antioxidants and ultraviolet absorbers to migration of yellowing substances are not specified in the Japanese Industrial Standards.

(Problem to be solved by the invention) However, the test method for sweat fastness according to the above Japanese Industrial Standards is a treatment at 37°C for 4 hours, and the processing conditions are weak, and poor fastness was not detected and it was difficult to actually wear it. However, there is a drawback that problems arise due to poor fastness. On the other hand, the test method for color fastness against sublimation during storage according to the Japanese Industrial Standards mentioned above is treatment at 120°C for 80 minutes, which is a strong treatment condition and is different from conditions similar to storage in a warehouse or conditions when worn.
The extent of the transition at room temperature could not be ascertained, and the actual situation was unclear. Furthermore, the migration of yellowing substances such as antioxidants and ultraviolet absorbers progresses slowly at room temperature, and an appropriate test method has not yet been found. The method of leaving the product at room temperature for a long time wastes time and energy resources required for measurement, and has the disadvantage that the product cannot be shipped immediately.

The present invention has been made in view of the above-mentioned problems, and includes:
An object of the present invention is to provide a method and apparatus for testing the fastness to migration of processed fabrics, which can accurately measure the fastness to migration of dyes, yellowing substances, etc. at room temperature in a short period of time.

(Means for Solving the Problems) In order to achieve the above object, the present invention has the following configuration.

That is, the first invention is to hold the processed cloth at a constant temperature and under vacuum with a piece of white cloth applied to the measurement surface, and after a certain period of time, to measure the state of migration of dyes, etc. to the white cloth and The gist is a method for testing the fastness to transfer of processed fabrics, which is characterized by determining discoloration and fading of the processed fabrics, and
The second invention is a work cloth comprising a chamber and a vacuum pump connected to the chamber, and a heat plate is provided in the chamber for maintaining the work cloth and the white cloth adjacent to each other at a constant temperature. The purpose of this paper is to provide a robustness test device for migration.

In the present invention, the fastness test against transfer of the processed fabric is carried out by holding a white cloth against the measurement surface of the processed fabric at a constant temperature, but the temperature is 20 to 20°C, which is close to the storage conditions in a warehouse or the conditions when worn. 80°C is preferred.

At the same time, it is kept under vacuum, but the stronger the vacuum, the faster the transfer of dyes, yellowing substances, etc. from the processed cloth to the white cloth.
Normally, it may be about 500 mmHg or less. The time to hold at a constant temperature and vacuum depends on the temperature, degree of vacuum, type of fabric to be processed,
Although it varies depending on the target migration substance, approximately 0.5 to 20 hours is usually sufficient.

(Function) Since the present invention is constructed as described above, when the vacuum is applied, the dye,
Due to the effect of making it easier for yellowing substances to migrate, it becomes possible to measure the transfer of dyes, yellowing substances, etc. from processed cloth to white cloth in a short time at room temperature.

(Example) Hereinafter, the present invention will be explained based on examples.

The method of testing the migration fastness of work fabrics according to the present invention is carried out using, for example, an apparatus as shown in FIG.

In Fig. 1, (1) is a chamber in which the upper part 1i (Ia) can be opened and closed, and (2) is the chamber (
1) is a vacuum pump connected to This vacuum pump (
As for 2), oil rotary pumps are standard, but diffusion pumps, liquid flow pumps, and sampling suction pumps are also used.

(3) is 20-180℃ provided in chamber (1)
(4) is a work cloth placed on the hot plate (3), and (5) is a white cloth placed in contact with the work cloth. , and (6) is a holding plate in which the same number of pores are bored.

Next, the operating state of the fastness test apparatus for transfer of work cloth constructed as described above will be explained.

First, open the upper lid (1a) of the chamber (1), and place the processed cloth (from the bottom) onto the hot plate (3) heated to a constant temperature.
4) and the white cloth (5) are placed so that they are facing each other, and press the presser plate (6).
) on the white cloth (5), close the top lid (Ia) of the chamber (1), and activate the vacuum pump (2).
Keep the chamber (1) in a vacuum.

After a certain period of time has passed, the upper lid of the chamber (1) (
Open 1a), peel off the white cloth (5) from the processed cloth (4),
The discoloration and fading of the work cloth (4) was determined in accordance with JIS L 0804, and the staining of the white cloth (5) was determined in accordance with JIS L 0805.

Next, we will specifically explain how to test sweat fastness, dye fastness to sublimation during storage, and migration fastness of yellowing substances. However, it is particularly applicable to processed fabrics dyed with reactive dyes that tend to have problems with sweat fastness. The type of dyeing may be either dip dyeing or printing, and is not limited. The processed cloth (4) and the white cloth (5) are, for example, JIS
Similar to the L0848A method, soak in acidic artificial juice and alkaline artificial juice for 30 minutes, squeeze off the excess test liquid until it does not drip, and place N1 on a hot plate (3).
place Then, at a constant temperature of 40 to 80°C, the degree of vacuum is 5.
00 mm) (g or less) for about 1 to 5 hours.

The test method for color fastness to sublimation during storage can be applied to dyed fabrics dyed with any dye, but it is especially applicable to dyed fabrics dyed with disperse dyes, such as regular polyester fibers that do not have polar groups and are susceptible to migration sublimation. Highly applicable to processed fabrics. The type of dyeing is not limited and may be either dip dyeing or printing. Then, it is held at a constant temperature of 40 to 80°C for about 0.5 to 5 hours under a vacuum of 500 mmHg or less.

The test method for migration fastness of yellowing substances can be applied to fabrics treated with any finishing agent, but it is especially applicable to fabrics treated with antioxidants and ultraviolet absorbers, which tend to cause yellowing problems. Highly sexual. The type of processing may be coating processing, banding processing, etc., and is not limited. And at a constant temperature of 30-50℃, vacuum degree of 500m
Wait for about 1 to 10 hours under a vacuum of mHg or less.

In addition, it goes without saying that various other test methods such as water fastness can also be applied.

(Effects of the Invention) As detailed above, according to the method of the present invention, it is possible to test the fastness against migration of processed fabrics in a very short time and with good workability under conditions close to those during storage or wearing in a warehouse. Eliminates waste of time and energy resources required for measurement.
Very useful.

Further, the fastness test device for migration of processed fabrics according to the present invention has the advantage of being simple and inexpensive.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. Explanation of symbols (1)...Chamber, (2)...Vacuum pump. (3)...Hot plate, (4)...Working cloth. (5) White cloth, (6)... presser plate.

Claims (2)

[Claims] (1) The work cloth is held at a constant temperature and under vacuum with a piece of white cloth applied to the measurement surface, and after a certain period of time, the state of migration of dye etc. to the white cloth and/or the work cloth A fastness test method for migration of processed fabrics, which is characterized by determining discoloration and fading. (2) A work cloth transition comprising a chamber and a vacuum pump connected to the chamber, and a heating plate is provided in the chamber to maintain the work cloth and white cloth adjacent to each other at a constant temperature. Fastness test equipment.