Patent GB-853185-A (GB)
Title: Compound fabrics
Inventor: ALFORD MAITLAND WALTON
IPC: B32B27/00
Filed: 1956-05-24
Abstract: 853,185. Laminates. BRITISH CELANESE Ltd. May 22, 1957 [May 24, 1956], No. 16109/56. Class 140. Fabrics made of or containing cellulose acetate, particularly cellulose acetate of high acetyl value (at least 59% of combined acetic acid) are bonded by heat and pressure to polythene, polyvinylidene chloride, polyethylene terephthalate, or nylon 6, 6.6, 6, 10 or 11 which melt below the temperature at which the acetate begins to melt. The polymer may comprise an interlayer between layers of acetate fabric, the resulting laminate being used to make semi-stiff collars. Laminates according to the invention may also be used to make belts, lapels, brassieres and book and instrument covers. The cellulose acetate fabric may contain acetate fibres mixed with non-thermoplastic fibres, or acetate fibres only in which case the fabric may be heat-set at a temperature above the bonding temperature, for example as described in Specification 758,442. The polythene or other polymer may comprise a film or a fabric made from yarn of the polymer only or admixed with non-thermoplastic yarn. A stiffer layer may be made by coating polythene on to both sides of a fabric of cotton, linen, or hightenacity or other regenerated cellulose fibres, or non-thermo plastic fibres such as polyacrylonitrile, or high melting point fibres such as glass or polytetrafluoroethylene. Alternatively the interlayer may comprise a mat of polythene fibres. The interlayer fibres, especially those of polythene or polyvinylidene chloride, may be pigmented to show through the outer layers. The higher melting polymers such as nylon 66 and polyethylene terephthalate may be employed when some glazing of the high acetyl cellulose acetate outer layers is not objectionable. Examples (1).-Collars were made from interlining blanks of cotton fabric coated on both sides with polythene and outer layer blanks of fabric of continuous filament cellulose acetate yarn of acetyl value 62%, the three layers being pressed together in a steam heated press for 30 seconds at 200‹ C. and 200 1b/square inch. (2) Interlining blanks of 4.5 mils. thick polythene film and outer blanks of fabric comprising yarn containing equal proportions of cotton and cellulose acetate staple of acetyl value 62% were pressed together at 235‹ C. (3) The polythene coated fabric of (1) was replaced by a coated fabric of cellulose acetate of acetyl value 52-54%; the three layers were ironed at 200‹ C. for 30 seconds. (4) The high acetyl fabrics of examples (1) and (3) were previously heat-set at 240‹ C. (5) The layers in examples (1) and (3) were pressed at 150‹ C. (6) A layer of randomly arranged loose filaments of polyvinylidene chloride coloured with a dark pigment was pressed at 190-200‹ C. between layers of white high acetyl fabric as in Example (1), heat set at 240‹ C.; the pigment showed through the outer layers. (7) Interlining blanks of 1.5 mils. thick nylon 6 were enclosed between blanks of fabric made from a yarn of equal proportions of regenerated cellulose and high acetyl cellulose acetate staple ; the layers were pressed together at 250‹ C.