Patent ID: 6294491
Filing Date: 2001-09-25
Classification: C03C,Y10T

Abstract:
An insulation product for use as an aircraft insulation, comprising:a fibrous air laid blanket of randomly oriented, entangled, flame attenuated glass fibers bonded together by a thermosetting binder and having a mean diameter of about 1+/-0.25 microns; the glass fibers being made from a glass composition consisting essentially of, in mol percent:SiO.sub.2 66-69.7 Al.sub.2 O.sub.3 0-2.2 RO 7-18 R.sub.2 O 9-20 B.sub.2 O.sub.3 0-7.1the glass composition having a C(acid).gtoreq.1.95, a C(bio).ltoreq.2.30, and a C(moist).gtoreq.2.40; the glass fibers have a biodissolution rate in excess of 150 ng/cm.sup.2 /hr; the blanket having a density between about 0.25 and about 0.37 pounds per cubic foot and a thickness between about 0.35 inches and about 2.0 inches; and the blanket, exclusive of anything else, having an average machine direction tensile strength of at least 0.6 pounds/inch of blanket width and an average cross machine direction tensile strength of at least 0.3 pounds/inch per inch of blanket length.