METHOD AND APPARATUS FOR MAKING LAMINATED PLASTICS SHEET

1,247,075. Laminates. LEYLAND GAS TURBINES Ltd. 27 July, 1970 [20 Aug., 1969], No. 41467/69. Heading B5N. [Also in Division B2] Laminated plastics sheet is produced by feeding a continuous web of flexible sheet material along an upper surface of a rigid base, feeding a continuous web on a woven or k...

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Bibliographische Detailangaben
Hauptverfasser:	CALVIN ERIC SILVERSTONE, MERVYN JOHN HANNAM
Format:	Patent
Sprache:	eng
Schlagworte:	FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR LAUNDERING LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM PERFORMING OPERATIONS TEXTILES TRANSPORTING TREATMENT OF TEXTILES OR THE LIKE WALL, FLOOR OR LIKE COVERING MATERIALS, e.g. LINOLEUM,OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF AFIBROUS WEB COATED WITH A LAYER OF MACROMOLECULARMATERIAL
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Zusammenfassung:	1,247,075. Laminates. LEYLAND GAS TURBINES Ltd. 27 July, 1970 [20 Aug., 1969], No. 41467/69. Heading B5N. [Also in Division B2] Laminated plastics sheet is produced by feeding a continuous web of flexible sheet material along an upper surface of a rigid base, feeding a continuous web on a woven or knitted fibrous material on to the upper surface of the web of flexible material, depositing an uncured plastics material together with a solvent therefor on to the woven or knitted fibrous material, through which some of the plastics material will flow to the flexible material, and forming a layer on the woven or knitted fibrous material of a required thickness of the plastics material and passing the composite sheet material through a solvent evaporation and curing region or regions. The'flexible material may be retained on the underneath surface of the layer of woven or knitted fibrous material after theresin has been cured until the laminated plastics sheet is to be used, when the flexible material is removed. Alternatively, the flexible material may be peeled off the underneath surface of the layer of woven or knitted fibrous material as soon as the resin has been cured, the flexible material being retained in a continuous web. The flexible sheet material may be paper or a film of impervious plastics mterial. The woven or knitted fibrous material may be glass fibre, asbestos or metal. The plastics material may be polyvinyl chloride, polyvinyl butyral or a retarded polyester resin. As shown in the drawing a web of paper 4 carrying a web 5 of woven or knitted glass fibre is fed over the upper surface of rigid base 1, past hopper 7 containing a solution of the uncured plastics material. Layer 8 of the uncured plastics material is formed on top of layer 5 and controlled in thickness by an adjustable doctor blade 9. Solvent evaporation and curing of the plastics material takes place in region 10. When curing is effected under pressure a separate curing means including heated compressive rollers may be provided following solvent evaporation means. After curing the laminated plastics sheet has paper web 4 peeled from it.