Light and rigid sunroofs. The German Company Johnson Controls has developed under the brandname Structhan a composite for producing very light moulded parts with a high rigidity and bending strength. The parts are based on a polyurethane sandwich panel made of paper alveolar plate covered with a glass or natural fibres mat on both sides.
Subject to the following conditions, the use of hydrochlorofluorocarbons shall be prohibited ...
(d) for the production of foams ... (iv) from 1 January 2003, for the production of polyurethane foams for appliances, of polyurethane flexible faced laminate foams and of polyurethane sandwich panels, except where these last two are used for insulated transport;
(v) from 1 January 2004, for the production of all foams, including polyurethane spray and block foams ...
Good to know
sandwich panel – core of insulation covered on both sides with such materials as concrete, metal, or asbestos
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