High-density glass fibre granules

Details High-density glass fibre granules High-density glass fibre granules

C - Chemistry, Metallurgy

03

B

C03B 37/14 (2006.01) C03B 37/16 (2006.01) C03C 1/02 (2006.01) C03C 25/26 (2006.01) C08K 7/14 (2006.01)

Patent

CA 2502333

The invention relates to a method of preparing glass fibre granules by mixing the cut glass fibres in the presence of 10 to 25 % water, said fibres being sized using a size comprising an organosilane. According to the invention, the cut glass fibres are mixed for a sufficient length of time such that the density thereof increases by at least 67 % using a single mixing device which mixes the fibres or the granules forming therein constantly at the same frequency. After drying, the end granules formed contain at least 95 wt.- % glass, a tackifier being brought into contact with the glass fibres at the latest during the aforementioned mixing operation.

L'invention concerne un procédé de préparation de granulés de fils de verre par brassage de fils de verre coupés en présence de 10 à 25 % d'eau, lesdits fils étant ensimés par un ensimage comprenant un organosilane, ledit procédé procurant un brassage pendant une durée suffisante pour que l'augmentation de la densité soit d'au moins 67%, et ce par un appareillage de brassage unique procurant à chaque instant la même fréquence de brassage aux fils ou granulés en formation qu'il contient, les granulés finalement formés contenant après séchage au moins 95% en poids de verre, un agent collant étant en contact avec les fils de verre au plus tard pendant le brassage. L'invention concerne aussi les granulés ainsi obtenus et leur utilisation.

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