Process for producing fibrous mats as a starting material for co

Details Process for producing fibrous mats as a starting material for co Process for producing fibrous mats as a starting material for co

1985-02-01

1991-06-11

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264510, 264518, 264113, 264118, 264119, D04H 158, B27N 312

Patent

active

050230271

ABSTRACT:
In a process for producing fibrous mats as a starting material for compression moulded articles, fiberized waste materials are mixed with thermoplastic and/or thermoset or thermosetting binders, the mixture is spread onto an air-permeable conveyor belt to give a first fleece layer, on said fleece layer is loosely placed a polyester fabric or lattice with at least partly multifilament threads, a mesh size between 4 and 7 mm and a thermoset or thermosetting finish, then a second fleece layer is spread onto the fabric or lattice and then the layers are compressed at elevated temperature and under pressure to give a transportable mat, from which individual moulded articles are produced by compression moulding at temperatures between 180.degree. and 220.degree. C., the polyester fabric undergoing thermal conditioning prior to its use at temperatures roughly corresponding to the mould temperature. In this way, during the forming of the mat to give a compression moulded article, there is no need for stabilizing layers above and below the mat and the moulded articles can be produced in a single-stage moulding process.

REFERENCES:
patent: 2543101 (1951-02-01), Francis
patent: 2993239 (1961-07-01), Heritage
patent: 3632371 (1972-01-01), Mikulka
patent: 3880975 (1975-04-01), Lundmark
patent: 3905864 (1975-09-01), Curry et al.
patent: 3975483 (1976-08-01), Rudloff
patent: 4028288 (1977-06-01), Turner
patent: 4141772 (1979-02-01), Buell

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