The textile burning test
experiment is an item that textile companies must test. Because different industries have different requirements for the fire prevention and burning of fabrics, the flame retardant grade standards for textiles have also been formulated, so the burning test of textiles and clothing companies is An essential test item. Textiles are the main material causing fires due to their structural characteristics. Therefore, the burning performance of textiles and clothing (such as evening wear, carpets, curtains and mattresses, etc.) has attracted more and more attention. Some developed countries have formulated relevant technical regulations and standards for this, and put forward requirements for the flame retardant properties of textiles such as evening wear, carpets, curtains and mattresses, and must be tested in accordance with the test methods specified in the regulations. The goods required by the regulations will be prohibited from being imported and sold. However, the flame-retardant performance requirements of textiles and clothing put forward by these developed countries on the grounds of maintaining personal safety are often used as a technical means to hinder the import of textiles and clothing from other countries. 1. Technical regulations on the combustion performance of textiles and garments in major trading countries 1. The United States passed the Flammable Fabric Act (FFA) as early as 1953 and revised it in 1954 and 1967. The United States Congress Promulgated and enforced by the US Consumer Product Safety Commission (CPSC), the bill mainly contains technical specifications for the flammability of clothing and interior decoration textiles, and prohibits the import, production and sale of highly flammable textiles and clothing. Accordingly, the CPSC also formulated: the flammability standard of clothing textiles (16C.FR1610); the flammability standard of vinyl plastic film (16C.FR1611); the flammability standard of children's pajamas: No. 0～6X (16C.FR) 1615); Flammability standard for children's pajamas: No. 7-14 (16C.FR1616); Surface flammability performance standard for carpet products (16C.FR1630); Surface flammability performance standard for small carpet products (16C.FR1631); The flammable performance standard of mattress (16C.FR1632). The above are all mandatory technical standards in the United States. All related textiles and garments sold in the US market must be tested accordingly and meet their specified flame retardant performance requirements. In addition, some states in the United States also have technical regulations on the flame retardant properties of textiles, such as California Technical Bulletin No. 117, which is mainly for home decoration textiles, for porous elastic materials, non-man-made fiber filling materials, man-made fiber filling materials, fluffy materials, etc. The flame-retardant properties and test methods are specified separately. (1) Flammability standard for clothing textiles (16C.F.R.1610 is similar to ASTM D 1230) This standard is mainly for clothing textiles (except for hats, gloves, shoes), and the flammability properties of clothing textiles are divided into three categories. Class 1: Conventional flammability, usually refers to the flame spread time ≥3.5s when the surface flat fabric passes the prescribed method test, or the flame spread time ≥7s when the surface raised fabric passes the prescribed method test, this type of textile is suitable for use Garment; Level 2: Moderately flammable, usually refers to the flame spreading time of 4～7s when the surface-raised fabric passes the prescribed method test. Such textiles can also be used in clothing, but be cautious; Level 3: Rapid and violent burning, It usually refers to the flame spread time of the surface-raised fabric tested by the prescribed method <4s, and this type of textile is not suitable for garment making. If it is detected to be highly flammable, then according to the regulations, such clothing textiles are not allowed to be traded and sold. The test method in the standard is similar to the American Society for Testing and Materials standard ASTM D 1230 (45? Tilt method). Each test requires 5 specimens of 5.08 cm (2 inches) × 15.24 cm (6 inches), respectively Test before and after dry cleaning and washing. (2) The flammability standard of vinyl plastic film. This standard applies to non-rigid, unsupported polyethylene plastic film (including transparent, translucent and opaque, flat, uneven, molded or passed through other surfaces). Finished), and polyethylene plastic film with a thickness of ≤0.33mm. It is required that the average burning rate of 5 samples in the longitudinal and transverse directions does not exceed 3cm/s. The test shall be carried out in accordance with the test procedure specified in the standard (45? Inclination method), using the SPI combustion tester. (3) Flammability standards for children’s pajamas The flammability standards for children’s pajamas (No. 0-6X) and the flammability standards for children’s pajamas (No. 7-14) are respectively applicable to children’s pajamas of No. 0-6X and No. 7-14, including Pajamas, pajamas and similar clothing, but diapers, underwear, baby clothes (less than 9 months old), and tights are not considered children’s pajamas. The test methods and flame-retardant performance requirements of the two standards are basically the same. It is required to test 5 samples of 8.9 cm×25.4 cm in accordance with the test method specified in the regulations (vertical method). The average carbon length of the samples is different. Over 17.8 cm (7 inches), the charcoal length of a single sample does not exceed 25.4 cm (10 inches). In addition, the regulations require that all the terms of the protection requirements be marked on the permanent label of children's pajamas.
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