Appeal No. 1995-1915
Application No. 08/117,846
6. A multi-layer composition comprising:
a) a barrier layer; and
b) a structural layer comprising:
i) about 79 to about 99 weight parts thermoplastic
crystallizable or crystalline polyester base resin having a
glass transition temperature (“Tg”) of at least about 50°C,
and a melting point of at least about 150°C and an intrinsic
viscosity (IV) of at least about 0.5; and
ii) an alkali metal salt of a polyester polymer in
an amount sufficient to provide the structural layer with
about 6.5 x 10 gram-atoms to about 15 x 10 gram-atoms of-7 -6
active alkali metal per gram of polyester defined in i).
The references relied upon by the examiner are:
Moritani et al. (Moritani) 4,929,482 May 29,
1990
International application WO 90/01042 Feb. 8,
1990
(Sublett)
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