초록 ▼

A method for continuously producing an insulation board comprising a rigid plastic foam core having two major surfaces and a facing material on one or both of the major surfaces, the method including conveying a facing material along a production line, depositing a partially expanded froth foam of a

A method for continuously producing an insulation board comprising a rigid plastic foam core having two major surfaces and a facing material on one or both of the major surfaces, the method including conveying a facing material along a production line, depositing a partially expanded froth foam of a plastic mixture, which contains at least one frothing agent, on the facing material, and further expanding and curing the froth foam in contact wiht the facing material to form the insulation board. The board is particularly useful as roof insulation.

대표청구항 ▼

A method for continuously producing an insulation board comprising a rigid plastic foam core having two major surfaces and a facing material on at least one of the major surfaces, the method comprising: (a) conveying a facing material along a production line, (b) depositing a partially expanded frot

A method for continuously producing an insulation board comprising a rigid plastic foam core having two major surfaces and a facing material on at least one of the major surfaces, the method comprising: (a) conveying a facing material along a production line, (b) depositing a partially expanded froth foam, which contains at least one frothing agent, on the facing material, the partially expanded froth foam comprising a mixture for forming a rigid polymer foam selected from the group consisting of polyurethane, polyisocyanurate, phenolic polymer, polyester and epoxide foams, and the frothing agent being easily vaporizable at atmospheric pressure, and (c) further expanding and curing the froth foam in contact with the facing material to form the insulation board. An insulation board comprising a core of rigid plastic foam having two major, substantially parallel surfaces and a facing material on at least one of the major surfaces of the core, the foam core being formed in accordance with the method of claim 1 by further expanding a partially expanded froth foam in contact with the facing material, and the cells of the resulting foam core containing the volatile frothing agent employed in the method.