Johns Manville

Harry Hand Russell, Iii

Jon Frederick Bauer

Foster Laverne Harding

Xiaojie Xu

Ralph Michael Fay

James Patrick Hamilton

Jeffrey Canon Townsend

Provided is a glass composition useful in preparing fiberglass, with the composition comprising SiOin an amount ranging from 52-62 weight percent: BOin an amount ranging from 3.5-5.5 weight percent; CaO in an amount ranging from 18-25 weight percent; MgO in an amount ranging from 0.5-4 weight percent; AlOin an amount ranging from 10-15 weight percent; and NaO in an amount ranging from 0.25-2 weight percent. The glass composition has an HTV of no greater than 2300&#xb0; F. and a liquidus temperature at least 150 &#xb0; F. less than the HTV temperature. The composition allows one to realize costs savings associated with lower batch costs and abatement requirements, without significantly increasing the energy required for melting the glass, reducing fiberization efficiency, or requiring the development of new bushing technology.

Low boron E-glass composition

Provided are glass compositions uniquely applicable for the preparation of ultrafine fibers for filtration and separation applications. The glasses meet all physical and chemical criteria, including that for biodissolution rate.

Glass composition for ultrafine fiber formation

Glass fibers prepared by flame attenuation display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glass fibers exhibit a biodissolution greater than about 350 ng/cm/ hr.

Flame attenuated fiberglass

An insulation product especially suited for use as an aircraft insulation includes a blanket of randomly oriented entangled glass fibers bonded together by a thermosetting binder and having a mean diameter of about 1&plus;/&minus;0.25 microns. The blanket has a density between about 0.25 and about 1.5 pounds per cubic foot and a thickness between about 0.35 inches and about 2.0 inches. The blanket, exclusive of anything else, has 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 of blanket length; a transverse airflow resistance between about 300 Rayls and about 1800 Rayls; and a thermal conductivity equal to or less than about 0.32 BTU-in/hr-ft,-&deg; F. The glass fibers of the blanket have a biodissolution rate in excess of 150 ng/cm,/hr.

Lightweight glass fiber insulation

Glass compositions suitable for pot and marble fiberization display excellent chemical resistance to both acids and moisture while being highly biosoluble at the same time. The glass compositions are characterized by ratios of components which are reflective of acid resistance, biosolubility, and moisture resistance. Preferred glasses have a difference between HTV (10.sup.3 poise) and liquidus greater than 500.degree. F., and a biodissolution greater than about 350 ng/cm.sup.2 /hr.

Growing community of inventors

Evergreen, CO, United States of America

Harry Hand Russell, Iii