Honeycomb containing poly(paraphenylene terephthalamide)...

B - Operations – Transporting – 32 – B

Patent

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Details

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

Patent

CA 2669979

This invention relates to a honeycomb having cells comprising a paper, the paper in one embodiment comprising 3 to 30 parts by weight aliphatic polyamide binder, and 70 to 97 parts by weight of a poly(paraphenylene terephthalamide) fiber having a modulus of 600 grams per denier (550 grams per dtex) or greater, based on the total amount of aliphatic polyamide binder and PPD-T fiber in the paper; and wherein the paper has an average specific tensile index of 60 (lbs/in)/opsy (310 Nm/g) or greater. In another embodiment, the honeycomb is made from a paper comprising 30 to 50 parts by weight aliphatic polyamide binder, and 50 to 70 parts by weight of a poly(paraphenylene terephthalamide) fiber having a modulus of 600 grams per denier (550 grams per dtex) or greater, based on the total amount of aliphatic polyamide binder and PPD-T fiber in the paper; and wherein the paper has an average specific tensile index of 60 (lbs/in)/opsy (310 Nm/g) or greater. Another embodiment includes articles comprising the aforesaid honeycombs, with such articles including a panel or an aerodynamic structure.

L'invention concerne une structure alvéolaire comportant des cellules contenant un papier. Dans un mode de réalisation, le papier contient 3 à 30 parts en poids de liant polyamide aliphatique et 70 à 97 parts en poids d'une fibre de poly(paraphénylène-téréphthalamide) ayant un module de 600 grammes par denier (550 grammes par dtex) ou plus, sur la base de la quantité totale de liant polyamide aliphatique et de fibre PPD-T dans le papier; et le papier a un indice d'extension spécifique moyen de 60 (lbs/in)/opsy (310 Nm/g) ou plus. Dans un autre mode de réalisation, la structure alvéolaire est réalisée à partir d'un papier contenant 30 à 50 parts en poids de liant polyamide aliphatique et 50 à 70 parts en poids d'une fibre de poly(paraphénylène-téréphthalamide) ayant un module de 600 grammes par denier (550 grammes par dtex) ou plus, sur la base de la quantité totale de liant polyamide aliphatique et de fibre PPD-T dans le papier; et le papier a un indice d'extension spécifique moyen de 60 (lbs/in)/opsy (310 Nm/g) ou plus. Dans un autre mode de réalisation, l'invention concerne des articles contenant de telles structures alvéolaires, de tels articles pouvant être un panneau ou une structure aérodynamique.

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