| 摘要 |
1,188,360. Laminated carpet. POLYMER CORP. Ltd. 11 July, 1967 [9 Aug., 1966], No. 31888/67. Heading B5N. A process for preparing double-backed tufted carpets in which carpets pile fibres are looped through a woven textile base, comprises applying a latex compound in foamed form, in an amount less than 20 ounces dry weight basis per square yard of carpet, to the underside of the textile base through which the pile fibres are looped, contacting the foam covered surface of the base with a backing sheet and drying, by heating, the assembly so obtained, the contacting and drying being so carried out as to destroy substantially all of the foam structure of the latex compound. The latex compound is defined as an aqueous latex of a rubbery polymer containing at least 50% by weight of total solids prior to being compounded, and being compounded by blending with other ingredients, e.g. thickeners, fillers, curatives, antioxidants or tackifiers. The latex may be of natural rubber or synthetic rubber, e.g. SBR, NBR or carboxylated SBR, and may include up to 400 parts by weight of filler, e.g. whiting, per 100 parts of dry rubber. The latex may also include a polyacrylate thickener and a small amount of a soap. The latex is foamed by air whisking using a foaming head, whisk, or beater, or by chemical foaming agents and is applied to the back of the carpet by spreading with a doctor blade, spraying, or using a lick-roller. A backing sheet, e.g. of woven or non-woven fabric, paper, polypropylene or open weave jute is then brought into contact with the wet foamed latex and the assembly passed between nip rollers. The carpet is then dried in an oven, which also cures the latex. The carpet may comprise cellulose acetate or acrylic pile fibres in a woven jute base. |
