Method for making laminates comprising a hard foam layer and a fiber-reinforced synthetic resin layer

US4316934A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Leonhard Maier · Babensham, DE
• Wolfgang Pip · Darmstadt, DE

Key dates

• Filing date: Jun 30, 1980
• Grant date: Feb 23, 1982
• Expiry date: Jun 30, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249991
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

What is disclosed is a method for making a laminate comprising a hard foam layer and a fiber-reinforced synthetic resin layer, which method comprises heating and compressing, in two steps, at least one layer of a high-temperature resistant hard foam and at least one layer of a fiber-containing synthetic resin capable of flowing and of hardening when heated, wherein in a first step, the temperature and pressure employed are sufficient for initiating flow of the synthetic resin and are applied until the synthetic resin has completed flowing, said pressure having a value exceeding the compressive strength of the foam at the temperature employed but not exceeding its compressive strength at room temperature and, wherein in a second step, at a temperature and for a time sufficient to complete hardening of the synthetic resin, pressure is applied which does not exceed the compressive strength of the foam at the temperature used.