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GB/T 24253-2009: Textiles - Evaluation for anti-mites activity Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 24253-2009: Textiles - Evaluation for anti-mites activity---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT24253-2009GB ICS 59.080.30 W 04 NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA Textiles - Evaluation for anti-mites activity Issued on. JUNE 19, 2009 Implemented on. FEBRUARY 01, 2010 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of the People's Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 4 4 Safety precautions... 5 5 Principle... 5 6 Equipment and materials... 5 7 Test mites... 6 8 Sample preparation... 6 9 Test methods and procedures... 7 10 Calculation and evaluation of results... 9 11 Test report... 10ForewordAnnex A of this Standard is informative. The Standard was proposed by China Textile Industry Association. This Standard shall be under the jurisdiction of the Basic Standards Subcommittee of National Standardization Technical Committee on Textiles (SAC/TC 209/SC 1). Drafting organizations of this Standard. Shenzhen Kangyi Health Products Co., Ltd., Beijing Jlsun tech Co., Ltd., Standardization Institute of Textile Industry, Guangdong Provincial Institute of Microbiology. Main drafters of this Standard. Shang Chengjie, Fang Xijiang, Xie Xiaobao, Jia Jiaxiang, Li Ya, Zhang Jintong, Zhang Hongjie, Wang Xingfu, Ouyang Yousheng. Textiles - Evaluation for anti-mites activity1 ScopeThis Standard specifies the test and evaluation for textiles’ anti-mites activity by repellent method and inhibition method. This Standard applies to various kinds of textiles such as feather, fibers, yarns, fabrics and articles. Wherein repellent method applies to all textile products; inhibition method is suitable for infrequently-washed products, for example, fillers (cotton, feather, etc.) and carpets. This Standard does not involve evaluation for anti-mites product safety.2 Normative referencesThe following normative documents contain provisions which, through reference in this Standard, constitute provisions of this Standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this Standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest editions apply. GB/T 12490-2007 Textiles - Tests for colour fastness - Colour fastness to domestic and commercial laundering (ISO 105-C06.1994, MOD)3 Terms and definitionsThe following terms and definitions apply to this Standard. 3.1 Mites A kind of tiny animal that belongs to Arthropoda, Arachnida, Acari, with the body of small spherical or elongated shape. The basic structure is divided into two parts. jaw and body. Mites at adult and nymph stage have four pairs of legs, the larvae have three pairs of legs. 3.2 Anti-mites activity Activity of products to repellent mites or inhibit the growth and reproduction of mites. 3.3 Control sample Materials that are used to validate the growth conditions of test mites; it shall use the same materials with the sample but without anti-mites finishing. If necessary, it can also use unprocessed 100% cotton fabric, after being high-temperature cooked and washed with distilled water, as the control sample.4 Safety precautionsMites are easily diffused under test condition and cause a certain harm to testing personnel or other people, so the test shall be conducted by trained personnel in the specified test environment.5 PrinciplePLACE the sample and the control sample on the petri dish respectively, MAKE them be in contact with mites under specified conditions.6 Equipment and materials6.1 Dissecting microscope or stereo microscope. 6.2 Constant-temperature-and-humidity incubator, temperature range is 20°C ~ 40°C; accurate to ± 1°C; humidity range is 70% ~ 90%, accurate to ± 5%. 6.3 Petri dishes, plastic or glass, with a diameter of 58 mm and a height of 15 mm. 6.6 Powdered mite feed, with a particle size diameter of less than 0.1 mm. It shall has sterilization treatment. 6.7 Mite counting tool. counter, dissecting needle, brush. 6.8 Test tubes, flasks and other commonly used laboratory equipment. 6.9 Oven.7 Test mites7.1 Mite species The test mites in this Standard adopt male and female adult mites or nymph mites of dust mites (Dermatophagoides farinae Hughhes). 7.2 Marks Each kind of test mites shall be marked with the following information.8 Sample preparation8.1 Sample size Fabric. SELECT representative specimens from each sample, CUT them into a circular with a diameter of 58 mm as a sample. 8.2 Sample pretreatment PLACE the sample at dry heat condition of 65°C ± 5°C for 10 min. 8.3 Sample washing If samples’ anti-mites and washability activity is to be tested, WASH the 3 samples on 8.1 according to the test condition A1M in GB/T 12490-2007; one cycle is equivalent to 5 times of washing (the specific operation of one cycle.9 Test methods and procedures9.1 Repellent method 9.1.1 PUT a piece of sponge with a thickness of 10 mm and a side length of about 200 mm INTO a covered container, ADD a suitable amount of saturated brine (6.10) (the height of water just immerses the sponge). 9.2 Inhibition method 9.2.1 PUT a piece of sponge with a thickness of 10 mm and a side length of about 200 mm INTO a covered container, ADD a suitable amount of saturated brine (6.10) (the height of water just immerses the sponge). 9.2.2 PLACE respectively 3 samples and 3 control samples IN 6 petri dishes, LAY the samples ON the bottom of the petri dishes uniformly, smoothly and tightly, and PUT 0.05 g of mites feed uniformly ON the samples. 9.2.3 PUT 150 living mites IN 6 petri dishes. 9.2.5 COVER the container, PLACE the container IN a constant-temperature-and- humidity incubator at a temperature of (25 ± 2)°C and a relative humidity of (75 ± 5)%. 9.2.6 After developed for 7 d, 14 d, 28 d or 42 d as needed, use a dissecting microscope to observe and record the number of living adult mites and nymph mites in the petri dishes. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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