EP0009418A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Glass composition for the production of fibres

Assignee: Partek Oy AB

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Filing: 1979-09-26

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Granted: —

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Expires: 1999-09-26

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Abstract

Abstract Glass fibres can be produced from molten glass compositions by various fibrisation processes, but each process requires a specifically developed glass composition in order to optimise the amount of wastage, the expense of the composition, the fluidity and crystallisation tendency of the melt, and the quality (heavy-weight or light-weight) and hydrolytic resistance of the glass fibre product. For example, the process giving a light-weight product in a high yield requires an expensive composition that cannot readily utilise industrial wastes. The glass composition of the invention is suitable for several processes and can utilise industrial wastes while giving a light-weight good quality product. The amounts of all components of the composition are maintained within specified ranges and the weight ratios CaO : Na 2 0, Si0 2 : A1 2 0 3 , K 2 0 : Na 2 O and (CaO/Na 2 O) : (SiO 2 /Al 2 O 3 ) are also maintained within given ranges.

Inventors

👤 Leo Valio Heikkinen
👤 Lars Johan Larsson

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-29 11:00

CPC Classifications

C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/11; C03C3/112; C03C3/115; C03C3/118; C03C13/00; C03C13/06; C03C3/083; C03C3/085; C03C3/087; C03C3/089; C03C3/091

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 57 words

A glass composition for the production of fibres comprising the following components in amounts within the respective given ranges (percentages are by weight): characterised in that the amounts of CaO, Na 2 0, SiO 2 , A1 2 0 3 and K 2 0 are such that the following weight ratios are within the respective given ranges:

Claim 2

Dependent Claim 57 words

Claim 3

Dependent Claim 25 words