| 摘要 |
1,091,232. Non-woven fabrics. OWENS-CORNING FIBERGLAS CORPORATION. Oct. 23, 1964 [Nov. 22, 1963], No. 43351/64. Heading D1R. Glass fibres are interbonded in a mat by impregnating the mat with an aqueous dispersion of synthetic-resin particles of size between 50 and 5 microns, and heating the mat to drive off water and cause the synthetic-resin particles to stick to the fibres and bind them together. As shown, glass is melted in a tank 10 and drawn into small streams 12 which are attenuated and solidified. They then pass over an applicator 13 for lubricant such as a water solution of distearate condensate of tetraethylenepentamine pelargonate, or even plain water. They then pass over a gathering shoe 14 and between puller wheels 15, and are projected on to a deflector trough 16. This is pivoted and oscillates to deflect the fibres on to but across the full width of the conveyer 18 where they form the mat 19. Alternatively the mat can be made of chopped strands or by steam blowing. The mat then passes beneath the weirbox 22 where a water dispersion of synthetic resin flows down the shoot 23 on to the mat. The conveyer is foraminous and excess dispersion flowing through it is collected in a trough 24 and returned by pump 33 for recirculation. The mat then passes over suction box 25 to remove excess liquid and then through a drying and curing oven 27. The synthetic resin powder may be of a polyester resin, e.g. an ester of diethylene glycol and maleic anhydride, cross-linked with diallyl phthalate, resins formed from a polyol and fumaric acid or linear polyesters, phenol-formaldehyde, ureaformaldehyde, polyvinyl acetate, melamineformaldehyde or polystyrene. |
