Honeycomb from paper having a high melt point thermoplastic...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 3/12 (2006.01) B32B 29/00 (2006.01)

Patent

CA 2669968

This invention relates to a honeycomb comprising matrix resin and paper, the paper comprising 50 to 80 parts by weight fibrous material having a modulus of 600 grams per denier (550 grams per dtex) or greater, 0 to 50 parts by weight powdered inorganic material, and 20 parts by weight or greater thermoplastic fiber, the improvement comprising the thermoplastic fiber is a binder for the paper and has a melting temperature above the curing temperature of the matrix resin; a glass transition temperature of greater than 100°C, and the weight average molecular weight of the thermoplastic polymer in the thermoplastic fibers changes 20% or less after being maintained for 10 minutes at the melting temperature. One embodiment of this invention includes an article comprising the aforesaid honeycomb, with such articles including a panel or an aerodynamic structure.

L'invention concerne une structure alvéolaire contenant de la résine matricielle et du papier, le papier comprenant 50 à 80 parts en poids de matériau fibreux présentant un module de 600 grammes par denier (550 grammes par dtex) ou plus, 0 à 50 parts en poids de matériau inorganique pulvérulent, et 20 parts en poids de fibre thermoplastique ou plus. L'invention est caractérisée en ce que la fibre thermoplastique est un liant pour le papier et présente une température de fusion supérieure à la température de durcissage de la résine matricielle et une température de transition vitreuse supérieure à 100°C, le poids moléculaire moyen en poids du polymère thermoplastique dans les fibres thermoplastiques changeant de l'ordre de 20 % ou moins après maintien à la température de fusion pendant 10 minutes. Dans un mode de réalisation, l'invention concerne également un article contenant ladite structure alvéolaire, un tel article pouvant être un panneau ou une structure aérodynamique.

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