Grid steam treatment

Details Grid steam treatment Grid steam treatment

1989-02-01

1990-04-03

Silblaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264 83, 264119, B29C 5900

Patent

active

049138723

ABSTRACT:
A process for the production of three-dimensionally deformed mouldings from planar blanks of binder-containing fibrous mats, which preferably contain cellulose and/or lignocellulose fibres is proposed. The initially pourable, loose fibrous material is brought into mat form and compressed to a tangled fibre fabric, from which the desired blanks are punched or separated in some other way. These blanks are subsequently softened by steam treatment or adequately plasticized for deformation purposes by some other heat treatment. In this form, they finally undergo the process which compresses or deforms the fibrous material. During or after steam treatment or the other thermal treatment, a linear or lattice-like retaining grid or pressing grid is applied to at least one side of the mat blank in such a way that, in accordance with the grid structure and at least partly stopping the thickness increase resulting from steam treatment, a corresponding compression pattern is impressed in the vaporized-on mat blank.

REFERENCES:
patent: 4393019 (1983-07-01), Geimer
patent: 4517147 (1985-05-01), Taylor et al.
patent: 4605467 (1986-08-01), Bottger

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