| 摘要 |
<p>1,233,910. Laminates; moulding plastic sub- stances. FARBENFABRIKEN BAYER A.G. 27 June, 1968 [4 July, 1967], No. 30684/68. Headings B5A and B5N. An article comprises a foam plastics 6 covered with an outer surface layer 1 and comprising adjacent to the outer surface layer, a zone of reinforced foam plastics, the reinforcement of which comprises at least one reinforcing insert, the or each insert being wholly embedded in the foam plastics, the or each insert comprising at least one mat 3 which is firmly united to at least one loose fibre structure 4, each mat being more compact than a loose fibre structure to which it is united, one insert being arranged so that a mat thereof is adjacent to the outer surface layer of the article. The foam plastics may be a polyurethane and may decrease in density towards the centre of the foam plastics. The outer surface layer may be of metal, glass fibrereinforced plastics material or a pre-preg. The reinforcing insert may be of glass fibres, synthetic resin fibres or filaments or of wire. The mat and the fibre structure may be united by needling, stitching or stapling or by the use of an adhesive. In a preferred embodiment, the insert comprises an electrostatically fibre-flocked coarse mesh mat. In a further embodiment, a voluminous non-woven fibrous structure is embedded in the part of the foam plastics not reinforced by the insert(s). In an example, a mould surface is coated with a gel coat of an epoxide resin to form an outer surface layer, a reinforcing insert consisting of two layers of woven glass fabric and two layers of bonded non-woven acrylic fibres (arranged alternatively) is applied to the gel coat and covered by a non- woven acrylic fibre structure, the mould then being charged with a polyurethane foam. The articles of the invention may be used in the production of vehicle bodies.</p> |
