Patent GB-1477145-A (GB)
Title: Flame retardant means
IPC: A47C27/00
Filed: 1974-07-12
Abstract: 1477145 Furniture frames; cushions N NORMAN 12 July 1974 [16 July 1973 1 Oct 1973] 33833/73 and 45855/73 Headings A4H and A4M [Also in Divisions B4-5] A padded article comprises a resilient or deformable padding of inflammable material, a flexible non-inflammable material covering all areas of the padding liable to be subjected to abnormal heat or fire and a flexible inflammable outer cover over the non-inflammable material. In a preferred embodiment, the padding is at least partly enclosed by the flexible non-inflammable material, a rigid support is provided for the padding and the padding is enclosed by the non-inflammable material or by the latter in conjunction with the support. The padding is of a material so effected by abnormal heat or fire so as to ignite and give off noxious or toxic fumes and may be a polyether foam, a polyurethane foam, a polyester, cotton, wool, rubber or rubber composition or a mixture of any two or more of these materials. The term non-inflammable material is defined as being a material which is itself non-inflammable or which converts to a non-inflammable layer or barrier under the influence of heat or flame, and which is of such open texture, at least when under the influence of heat or flame, so as to allow gases to escape therethrough when the padded article is subjected to heat or flame whilst not allowing flame to penetrate to the padding, examples of such materials being material woven or otherwise formed from glass or asbestos fibres, woven materials treated with a flame-proofing agent, an open-textured panel of asbestos, a coating or film of non-inflammable or heat-insensitive material applied to the padding and perforated and wove or layered asbestos flakes or wool bonded to a scrim or sandwiched between two layers of scrim or fabric. The outer cover may be a flame-retardant material e.g. treated cotton. The padding, non- inflammable material and outer cover may or may be secured together e.g. by adhesive or heat-bonding. Fig. 1 relates to an article in the form of a cushion comprising the padding totally enclosed firstly within a cover formed of non-inflammable material and secondly within a decorative outer covering. The article of Fig. 2 comprises a wedge-shaped padding 3 secured by glueing to a wall, frame a panel 4, the exposed areas 5 of the padding being covered by a non-inflammable material 6 secured at 7 around the periphery of the padding 104, the resultant unit being covered by an outer cover (not shown) of furnishing material. In the embodiment of Fig. 3, a laminate is made comprising a padding 8 having a layer 9, 10 of non-inflammable material located on each surface thereof, the non- inflammable material extending at 11 beyond the edges of padding 8, and being secured by tacking, gluing or stapling to a frame or board 12 to be used on an upholstered article of furniture or to form a sound and/or insulation panel or partition. Fig. 4 shows a moulded frame 13 of expanded polyurethane polyester provided with a padding and having a non-inflammable material 14 secured thereto and substantially enclosing the frame and padding prior to the application of an outer cover of furnishing fabric. The article of Fig. 5 comprises a laminate comprising 3 or more layers consisting of padding 15 and layer 16 of non-inflammable material. Fig. 6 shows a squab 17 of polyether foam secured to a plywood panel 18, a flexible sheet 19 of woven asbestos fibre covering the upper and edges of the squab 17 and overlapping the under surface of the plywood, the layer 19 optionally enclosing the plywood 19 and the outer surface of the asbestos fibre sheet being covered by a leatherette cover 20 whilst the undersurface of the panel 18 is covered by a scrim-like textile material 21 stapled thereto at 22.