Textile antifouling performance testing GB/T30159 - China Garment Website_China's popular garment and fashion information platform

Anti-fouling textiles are becoming more and more popular among consumers, which indirectly triggers manufacturers to carry out anti-fouling finishing on fabrics.

1 range

This part of GB/T30159 specifies two test methods for determining the stain resistance of textiles, namely the liquid stain method and the solid stain method, and provides evaluation indicators for stain resistance.

This section applies to all types of textile fabrics and their products. Depending on the product type and use, one or two methods can be selected. Test results obtained using different soils and methods are not comparable.

This section does not apply to coated fabrics for membrane structures. When the color of the sample is similar to that of solid contamination, it is not appropriate to use the solid contamination method for evaluation.

2Terms and Definitions

The following terms and definitions apply to this document.

2.1 Anti-soil properties

The material’s resistance to contamination. That is, the material has the property of not easily being stained, or being easily removed even if it is stained. It is characterized by stain resistance and easy decontamination.

2.2 stain resistance

The material is less likely to adhere to dirt after it comes into contact with liquid or solid dirt.

3Principles

A certain amount of liquid or solid dirt is applied to the surface of the textile sample, and the stain resistance of the sample is evaluated based on the degree of adhesion of the dirt to the sample.

The liquid contamination method is to drop specified liquid contamination on the surface of a horizontally placed sample. Observe the wetting, wicking and contact angle of the liquid droplets on the sample surface to evaluate the sample’s resistance to contamination by liquid contamination. degree.

The solid contamination method is to fix the sample in a test cylinder containing specified solid contaminants. Turn the test cylinder over to make full contact between the sample and the contamination. Use a gray sample card to compare the contaminated parts of the sample with the uncontaminated parts through discoloration. The color difference of the parts is used to evaluate the resistance of the sample to solid dirt contamination.

4Equipment and Materials

4.1 Liquid contamination method

4.1.1 Liquid dirt, first-grade pressed oil in compliance with GB 1534-2003 or high-salt dilute fermented soy sauce (dark soy sauce) in compliance with GB 18186-2000.

4.1.2 Dropper bottle. Equipped with a ground-mouth dropper.

4.1.3 Suction filter paper, medium speed qualitative.

4.2 Solid contamination method

4.2.1 Solid dirt shall comply with the composition and preparation requirements in Appendix A.

4.2.2 Turnover box, a cube box with each side length of (235±5) mm, the box should rotate around the horizontal axis passing through the center of the two opposite sides of the box, with a rotation speed of (60±2) r/min. One side of the box should be openable for sample access. The pilling test chamber specified in 5.1 of GB/T 4802.3-2008 can also be used.

4.2.3 The test sample consists of three parts: the sample body, the sample cover and the sample fixing piece. The total mass is about 350g:

{C}a){C}The simple body (see Figure 1) and simple cover are both made of impact-resistant hard materials Made of aluminum (such as aluminum), the inner diameter of the simple body is (90 ± 0.5) mm, the height is (100 ± 0.5) mm, and the thickness is (3 ± 0.5) mm; the simple wall has 3 rectangular holes evenly distributed, each The inner arc length of each hole is (50 ± 0.5) mm, and the height is (80 ± 0.5) mm; the cover can be tightly coupled with the body.

b) The specimen fixing piece is made of elastic rubber. The length is the same as the outer diameter and circumference of the body, the width is (93±0.5) mm, and there are three cuboidal protrusions with a thickness of (3±0.5) mm on it. When covering the simplified body, the convex part closely matches the rectangular hole of the simplified body and is on the same circumferential surface as the inner surface of the simplified body.

5.2.4 The protective bag is made of 3 layers of A-type polyester cleaning cloth that complies with the regulations in GB/T8629-2001. The size is suitable to fit the test bag. The mouth of the bag can be tied tightly with a rope to prevent the test bag from being easily loaded. During the flipping process in the flipping box, the inner wall of the flipping box is polluted and damaged.

4.2.5 Household hair dryers.

4.2.6 Tape.

4.2.7 Use gray sample cards to evaluate discoloration, in line with GB/T 250.

5 Sample preparation and humidity adjustment

Take a representative sample from each sample and ensure that its surface is free of contamination and wrinkles. For liquid contamination method, take 2 samples, the size can be full.

6Program

6.1 Liquid contamination method

6.1.1 The test is conducted under the standard atmosphere specified in GB/T 6529.

6.1.2 Place two layers of filter paper on a smooth surface, and then place the sample flatly on the filter paper with the front side facing up.

6.1.3 Select one or two dirty liquids as needed. On the three parts of the sample, use a dropper to drop approximately 0.05ml. (1 drop) of dirty liquid (see 5.1.1) in each part. The distance between each droplet should be at least 50mm. When dripping liquid, the distance between the dropper mouth and the sample surface is about 6mm.

6.1.4 After the sample is allowed to stand (30±2)*, observe each droplet at an angle of about 45″ and rate it according to 8.1.

6.1.5 Test another sample according to 7.1.1~7.14.

6.2 Solid-state contamination method

6.2.1 Place the test sample flatly on the sample fixing piece with the test surface facing up, so that it covers the three raised parts, and wrap the tube with the sample fixing piece.

6.2.3 Place the protective bag containing the test bag into the flip box, make the axis of the bag parallel to the horizontal axis of the flip box, and close the box lid.

6.2.4 Start. Turn the box over and stop after 200 rotations. Take out the sample.

6.2.5 Use a hair dryer to blow off the dirt attached to the surface of the sample. Rated at 8.2.

6.2.6 Test another sample according to 7.2.1~7.2.5.

6.2.7 After the test, clean the test strip.

7Result expression and evaluation

7.1 Results of liquid contamination method

Observe the state of liquid dirt on the surface of the sample, and rate each droplet according to the grade given in Table 1. If it is between two grades, record half a grade, such as grade 3-4. If there are 2 or 3 levels in the same sample that are the same, then that level will be used as the level of the sample; if the 3 levels are not the same, then the middle value will be used as the level of the sample. Take the lower level of the two samples as the test result of the sample.

7.2 Results of solid-state contamination method

Use the discoloration gray sample card to evaluate the color difference between the central part of the contaminated area and the uncontaminated area of the sample. If there are a few deep stains, they will not be included in the rating range. Rating each sample, if there are 2 or 3 contaminated areas with the same grade, then the grade is that of the sample; such as the rating range. Rating each sample, if there are 2 or 3 contaminated areas with the same grade, then the grade is that of the sample; see the results.

7.3 Evaluation of stain resistance

If necessary, evaluate the contamination resistance of the sample according to the selected test method: when the test result using the liquid contamination method is level 3-4 or above, the sample is considered to be resistant to liquid contamination. When the test result using the liquid contamination method is level 3-4 or above, the sample is considered to be resistant to liquid contamination.

8Test report

The report should include the following:

a) The test is conducted in accordance with this standard:

b) Description of sample:

c) Test methods used and their contaminants;

d) Contamination resistance level of the sample;

e) Whether it has been washed;

f) If necessary, give an evaluation of the stain resistance of the sample;

g) Any deviation from this standard.

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