| 摘要 |
The invention relates to the use of a flame resistant knit tube, made with either a seamless or seamed circular knit or a seamed or tubular warp knit fabric, used to protect a mattress, foundation, upholstery cushion, pillow, office panel, transportation seat or any other article requiring flame resistant protection. In this invention, a tubular knit fabric is formed utilizing flame resistant yam and then optionally heat-set to prevent curling during subsequent cutting and processing. Heat-setting the knit fabric is especially preferred for circular knit constructions to prevent curling in subsequent processing. The knit tube is then cut to the length of the article to be flame protected, allowing enough additional length to sew a pocket closure on one end and a standard closure on the other end. First, one end of the tubular knit sock is sewn with a pocket closure seam, using a flame resistant thread or a suitable substitute. The open end of the tubular knit sock is then rolled up to the sewn pocket closure end so that it can be easily positioned over the article to be protected from flame. The rolled up knit sock is then unrolled down the length of the article to be flame protected. The second closure seam is then sewn with flame resistant thread, or a suitable substitute, over the open end of the article to completely encapsulate and protect the article. The invention has particular applicability in the formation of fire resistant foam mattresses and foundations that require passage of large open flame tests such as California's Test Bulletin 603 and Test Bulletin 129 and in the formation of fire resistant foam upholstery cushions that require passage of California's Test Bulletin 133 or British Standard 5852 using the crib 5 ignition source.
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