Evaluation of stain removal performance of polyester-cotton fabrics

Evaluation of stain removal performance of polyester-cotton fabrics – Textile Industry Standard of the People’s Republic of China

Foreword
Easy-to-remove polyester-cotton fabrics are mass-produced by domestic manufacturers and used to make labor protection work clothes in oil fields and other industries. However, there are no unified inspection methods and product quality grading standards. In order to protect the interests of consumers and regulate the market, the China Textile and Apparel Federation issued the task of formulating the industry standard “Evaluation of Contamination Removal Performance of Polyester and Cotton Fabrics” in the form of Textile Standard (1997) 014. The test method refers to the American AATCC 130-1995 (easy decontamination test: dirty oil removal method, pressure weight and oil dripping amount); the washing equipment and washing methods adopt GB/T 12490-90; the rating adopts the national standard GB250-1995 (evaluation of discoloration Use gray sample card) to facilitate the implementation of the standard.
This standard will be implemented from October 1, 1998.
This standard is proposed by the Science and Technology Development Department of China Textile and Apparel Federation.
This standard is under the jurisdiction of the National Textile Standardization Technical Committee. Textile Industry Standards of the People’s Republic of China
Evaluation of stain removal performance of polyester-cotton fabrics
FZ/T10012-1998
1 Scope of application
This standard specifies the evaluation, grading regulations, test methods and Packaging logo.
This standard is suitable for evaluating the easy stain removal performance of polyester and cotton fabrics after easy stain removal finishing. Other types of fabrics that can be easily decontaminated can also be used as a reference.
2 Quotation standards
The provisions contained in the following standards constitute provisions of this standard through reference in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using new versions of the standards listed below.
GB 250—1995 Gray sample card for evaluating discoloration
GB／T 12490-90 Test method for color fastness of textiles to household and commercial laundering
3 Definition
This standard adopts the following definitions.
Easy to remove dirt
After textiles are easily decontaminated, they can be easily cleaned with ordinary washing methods after being contaminated by oil without affecting the wearing performance. Wash it clean.
4 Grading regulations
The easy stain removal performance of polyester-cotton fabrics is divided into high-quality products, first-class products and qualified products (see Table 1 for details).
5 Test method
5． 1 Preparation before easy decontamination test
5． 1.1 Preparation of standard dirty oil
5． 1. 1.1 Take 100g of 14# engine oil, add 0.1 g of carbon black (carbon black particle size is less than 40/μm), stir for 6 minutes with a high-speed mixer (6 000 ~ 7 000 r/min), and then pour it into a reagent bottle for later use.
5. 1. 1. 2 Edible vegetable oil (suitable for bleaching fabrics in canteens, hotels, and hospitals).
5. 1. 2 Easily stain-removable fabric sample preparation
Cut from a piece of fabric that is easy to remove and finish, at least two meters away from the end of the fabric, and has no appearance defects. 6 pieces of 150mmXl50mm specimens are available for spare use.
5. 1. 3 Cut colorless and transparent polyethylene film (thickness is 0.03~0.05mm, size is 70mmX 70mm ) 6 pieces for spare.
5. 1. 4 Cut 6 pieces of qualitative filter paper (70mmX70mm) for later use.
5. 1 .5 Test steps for oil stains
Place 6 pieces of prepared filter paper on the test bench, and then place the unwashed test paper prepared according to 5.1.2 Place 3 pieces of samples and 3 pieces of samples washed 15 times according to the washing procedure in 7.1 respectively on the filter paper; then use a 0.2mL pipette to take out the samples.Oil up to the mark, and slowly drip all the dirty oil at the center of the sample (the nozzle is 10-15mm away from the cloth surface). Cover the sample with dirty oil dripping with the polyethylene film prepared according to 5.1.3, place a weight with a diameter of 64mm and a mass of 2.25kg at the contact point between the film and the dirty oil, and press it for 1 minute. Remove the weight and remove the film. The sample shall be left at room temperature for (20 ± 3) minutes and then washed with oil stains.
Note: If the sample is colored fabric, use the dirty oil specified in 5.1.1.1; if the sample is bleached fabric, use the cooking oil specified in 5.1.1.2.
6 Washing equipment and reagents
6. 1 Washing equipment, see 4.1 and Appendix A in GB/T 12490-90.
6. 2 See the provisions of GB/T 12490 for washing reagents.
7 Washing method
7. 1Washing before oil stains
Take 6 samples prepared according to the requirements of 5.1.2, according to Table 6.1 in GB/T 12490-90 2 AIM program, temperature 40°C, liquor ratio 1:30, detergent as specified in 6.2, concentration 2g/L, washing for 135 minutes (15 washes are deemed completed). Take out the sample, rinse it with flowing room temperature water for 10 minutes, squeeze out the water by hand, and dry it in a 60°C oven for later use.
7. 2Washing after oil stains
Add 2g/L of synthetic detergent that meets the requirements of 6.2, the liquor ratio is 1:30 (W fabric/W lotion), and the water capacity must not be less than 26L. If the quality is insufficient, use the same fabric as the sample to make up for it. When the water temperature rises to 40°C ± 3°C, turn the washing machine to the standard setting, keep warm and wash for 12 minutes, rinse twice with room temperature water, rinse for 2 minutes each time, dehydrate for 2 minutes, and then dry in a 60°C oven for grading.
8 Sample rating
Use GB 250 to evaluate discoloration using a gray sample card to evaluate the easy decontamination level of samples that have not been washed and washed 15 times according to the 7.1 washing procedure. Each test is based on serious staining (tips: when rating, use oil stains. On the same cloth after washing, the areas that are not stained with oil will remain as they are; stained areas with a diameter exceeding 40mm will not be rated according to the gray sample card and will be rated as level 1).
9 Packaging and Logo
The outer packaging of products that are easy to decontaminate must have the words “easy to decontaminate”

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