AbstractTwo new flame‐retardation methods for polyester/cotton blend fabric were attempted with reference to thermal reactions of the blend fabric. One is the combination of phosphorylation of the cotton component and the addition of a phosphorus compound. The phosphorus compound must not interact with cotton component. The other involves the addition of a powerful flame retardant for the cotton component only. The flame retardant must induce only a small amount of carbonous products from the pyrolysis of the cotton componen
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