Polyester and cotton flame retardant fabric-encyclopedia recommendation
OverviewIn a fabric with only polyester and cotton, when the cotton content is equal to or exceeds 50%, this fabric is called CVC. CVC stands for CHIEF
VALUE OF COTTON, textiles with cotton as the main value. In other words, the more ingredients cotton contains, the more expensive it is.
CVC is polyester-cotton. Because it contains polyester, it has good wear resistance and wrinkle resistance. And because CVC fabrics contain more cotton, they feel soft and non-irritating to the skin. However, because the polyester fiber is a hydrophobic fiber, it has a strong affinity for oil stains and easily absorbs oil stains. It also easily generates static electricity during wearing and attracts dust, making it difficult to wash.
Polyester-cotton blended products are generally called CVC yarn if the cotton content is higher than polyester, and vice versa, it is called T/C yarn. What we usually call CVC refers to products with a cotton content of more than 60% and a C/T ratio of less than 50/50. Generally, it is still called T/C yarn.
Flame retardant finishing is carried out on the basis of CVC fabric, which has good flame retardant properties. CVC flame-retardant fabric is wear-resistant and wrinkle-resistant, and has a long wearing time, so it is more economical to use.
The flame retardant performance can reach EN531, EN533, EN470-1, ASTM D6413 and other standards.
Flame retardant standards are now implemented: EN11611, EN11612. EN531 and EN533 are past standards
EN 11611 (formerly EN 470-1) Chinese full name: Flame retardant standard for protective clothing worn by operators during welding operations
Execution standards
a) After any test sample is ignited, there should be no burning that spreads to the edge of the fabric or the upper end of the fabric.
b) There should be no holes formed in any test sample after ignition.
c) There should be no burning droplets or molten material falling in any test sample after being ignited.
d) The ignition delay time must be less than or equal to 2 seconds.
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Negative effects of falling metal droplets: According to the requirements, the clothing assembly must have at least 15 droplets of metal falling. Testing method: Preparation of samples Testing samples are based on testing fabrics, and the required quantity and size must be consistent with the relevant testing methods. If there are no special provisions, the test shall be carried out based on the received test samples. In the pre-treatment process of textile fabrics, the test samples are washed or dry-cleaned according to the requirements on the instructions for use label, and then the performance of the textile fabrics and their clothing assemblies are tested according to the special safety precaution requirements. Add 1g/L to front loading horizontal drum washing machine
Wash the sample five times with soft water using IEC detergent, and then dry it according to the method specified in ISO:6330:1984 edition. There are no other special provisions in the label. Water washing should be performed by method 2A, the temperature is controlled at (60±3)°C, and then the sample is dried (tumble drying) using method E.
1. Breaking Strength The breaking strength of textile fabrics is evaluated in the transverse and weft directions of the fabric according to the requirements of ISO5081. (The small breaking strength should be 300 Newtons)
2. The tearing strength is tested in the transverse and weft directions of the test sample. The tearing strength of the textile fabric is evaluated according to the requirements of the A1 method in the ISO4674:1977 version. The tearing strength of the textile fabric is tested in two directions at right angles to the plane of the fabric. The tearing strength of leather products is evaluated according to the requirements of ISO3374. (The minimum tearing strength should be 15 Newtons)
3. The shrinkage rate (dimensional change) is tested according to the dry cleaning method or the water washing method, and the shrinkage rate of textile fabrics is judged according to the provisions of ISO5077. (Shrinkage rate not greater than 3%)
4. Evaluation of flame spread: After washing or dry cleaning the test sample according to the prescribed method, the EN532 method is used to detect the flame spread performance of the fabric.
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