Laminated insulating board
AssigneeCoal Industry (Patents) Limited
InventorsRodney Taylor, Robert J. Pragnell, John P. Sheppard
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Abstract
An insulating board of excellent properties is made from a core of foamed phenol-formaldehyde resin which has a closed cell content of at least 85%, laminated on at least one face using a water-based natural rubber latex adhesive with a glass fibre tissue or cloth. The laminate has good fire resistance and can be bonded to roofs etc. using hot bitumen.
Claims5
A laminated insulating board comprising an insulating core of foamed phenol-formaldehyde resin which has a closed cell content of at least 85% and on least one face of said core a glass fibre woven or non-woven cloth or tissue laminated to the core with a water-based natural rubber latex adhesive, the laminate having a water absorption of not more than 10% v/v, a thermal conductivity (k-value) of less than 0.035 W/m.degree.C., a flexural strength of at least 50.times.10.sup.4 N/m.sup.2, a tensile strength of at least 30.times.10.sup.4 N/m.sup.2, a compressive strength of at least 20.times.10.sup.4 N/m.sup.2 and a delamination peel strength of at least 200 N/m at room temperature.
Dependencies are inferred from the claim text.