Base material for honeycomb core structure and process for produ

Details Base material for honeycomb core structure and process for produ Base material for honeycomb core structure and process for produ

1986-05-19

1987-12-01

Epstein, Henry F.

Stock material or miscellaneous articles

Article of intermediate shape

1621573, 428116, 428288, 428296, B32B 312

Patent

active

047104325

ABSTRACT:
A base material for a honeycomb core structure comprises a paper-like polyester fiber sheet comprising 20% to 80% by weight of drawn polyester staple fibers which preferably have a flat cross-sectional profile having a flatness, which refers to a ratio in length of a major axis to a minor axis of the profile, of from 2.5 to 30.0, 20% to 80% by weight of the sum of undrawn polyester staple fibers and other polyester staple fibers having a lower melting point than that of the undrawn polyester fibers, and having a porosity of 60% or less and a resistance to permeation of air of 100 sec/100 ml or more.

REFERENCES:
patent: 3223581 (1965-12-01), Sommer et al.
patent: 3309260 (1967-03-01), Boese
patent: 3933589 (1976-01-01), Keyes
patent: 4155792 (1979-05-01), Gelhaar et al.
patent: 4307768 (1981-12-01), Anderson
patent: 4496583 (1985-01-01), Yamamoto et al.
patent: 4520124 (1985-05-01), Abe et al.
patent: 4569884 (1986-02-01), Weinand et al.
patent: 4621020 (1986-11-01), Tashiro et al.

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