Manufacturing method of a rigid or semi-rigid foamed material and a composite panel
Номер патента: CA1291605C
Опубликовано: 05-11-1991
Автор(ы): Hiroya Fukuda, Seiji Ishii, Takashi Ohashi
Принадлежит: Bridgestone Corp
Опубликовано: 05-11-1991
Автор(ы): Hiroya Fukuda, Seiji Ishii, Takashi Ohashi
Принадлежит: Bridgestone Corp
Реферат: ABSTRACT OF THE DISCLOSURE The present invention is a manufacturing method of a rigid or semi-rigid foamed material which comprises a foaming process to make a practically thermoplastic foamed material wherein isocyanate component is reacted with polyol component in the presence of organic foaming agent and/or water in a condition that an excess quantity of the isocyanate component than the stoichiometric equivalent to the polyol component and water is used in the reaction and a successive cure molding process wherein the said practically thermoplastic foamed material is contacted with water or steam to react the isocyanate component remaining therein with water while heating. The foamed material obtained by the first foaming process is not reached to the final curing of the remaining isocyanate and rigid or semi-rigid at room temperature, but it is softened by heating enable to be used for deep draw molding in the successive cure molding process without crack, split, or demolition. Then, it is contacted with water or steam in the final cure molding process, to react the isocyanate component remaining therein with water to proceed to final curing, thus becomes a rigid or semi-rigid foamed material without softening by heating. The intermediate practically thermoplastic foamed material can be laminated with facing materials or reinforced with glass fiber non-woven cloth etc. to give a composite panel with excellent properties such as light weight, stiffness, heat insulation, acoustic insulation and moisture resistance suitable for a molded ceiling or a door panel etc. for automobile use and a partition or a screen for interior use.
Flame-retardant three-dimension-molded object and manufacturing method thereof
Номер патента: US20210347959A1. Автор: Teng-Yuan Ou,Ting-Chun Chen. Владелец: Teco Image Systems Co Ltd. Дата публикации: 2021-11-11.