Difficulties in finishing polyester-cotton flame-retardant fabrics
Tag:
Flame retardant fabric Flame retardant finishing
Polyester-cotton fabrics are popular among consumers due to their excellent performance and durability. However, because it is easy to burn and can easily cause fire accidents and cause huge losses, research on flame-retardant finishing has received widespread attention. To date, flame-retardant finishing of polyester-cotton fabrics has been found to be far more difficult than flame-retardant finishing of either part. The main reasons are: (1) The mutual thermal induction of polyester and cotton polymers or their cracked products accelerates the overflow of the cracked products, so the polyester-cotton fabric ignites much faster than pure polyester and pure cotton. ; (2) During the burning process, the flame retardant will migrate between the polyester and cotton components. Therefore, it also brings difficulties to the flame retardancy of polyester and cotton fabrics; (3) Because cotton is a non-melting and non-melting material. Shrunken flammable fibers. When polyester-cotton products burn, the cotton fibers will be carbonized, which acts as a stent for the polyester similar to a candle wick, thus preventing the polyester droplets from leaving the fire source; (4) In polyester-cotton products, When the blended fabric is heated, the heated and melted polyester component will cover the surface of the polyester fiber, and the polyester fiber and the char generated by its cracking will form a skeleton, preventing the fabric from shrinking, causing the molten polyester to become a fuel in the fire zone, making the fabric burn more severe. Therefore, to reduce the flammability of polyester-cotton fabrics, the following points need to be achieved: (1) When blended fabrics are flame-retardant, use appropriate flame retardants whose functions are more complementary or do not interfere with each other; (2) Eliminate the skeleton effect and the interference of the two groups; (3) Each part of the blended fabric must be flame retardant. For a long time, the flame-retardant finishing technology and flame retardant properties of polyester-cotton fabrics that have been developed have been difficult to meet the requirements of certain uses. The existing problems are mainly that the handle or mechanical strength of the finished fabric is not satisfactory; secondly, the production ecology needs to be improved.
：Textile
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