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US 2008/0145600 A1Published application
Honeycomb from paper having flame retardant thermoplastic binder
AssigneeE.I. du Pont de Nemours and Company
InventorsGary Lee Hendren, Subhotosh Khan, Mikhail R. Levit
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Abstract
This invention relates to an improved flame retardant honeycomb comprising high modulus fiber and a flame retardant thermoplastic binder having a melt point of from 120° C. to 350° C. and a limiting oxygen index of 26 or greater, methods for making the honeycomb, and articles comprising the honeycomb. In a preferred embodiment the paper in the honeycomb has a flame classification of UL-94 V-0.
Claims14
A honeycomb having cells comprising a flame resistant paper,
- the paper comprising:
- a) 5 to 50 parts by weight thermoplastic material having a melting point of from 120° C. to 350° C., and
- b) 50 to 95 parts by weight of a high modulus fiber having a modulus of 600 grams per denier (550 grams per dtex) or greater, based on the total amount of thermoplastic material and high modulus fiber in the paper,
- wherein the thermoplastic has a limiting oxygen index of at least 26.
1 more element
Dependencies are inferred from the claim text.