The present invention provides a thermoformable polymer blend that resists surface
discoloration when exposed to acidic environments, such as exist within a clothes
treating apparatus having an interior region into which is introduced a conditioning
composition comprising from about 0.001% to about 10% of a diethylene glycol, from
about 0.01% to about 10% of a beta cyclodextrin, from about 0.001% to about 5%
of a surfactant, from about 0% to about 2% of a preservative, and the balance water.
The discoloration resistant thermoformable polymer blend according to the invention includes:
- (A) a polymer package including a blend of:
- (Ai) one or more homopolymers and/or copolymers of polypropylene;
- (Aii) one or more polymers of vinyl aromatic monomers;
- (Aiii) one or more block polymers; and
- (Aiv) one or more styrene-maleic anhydride copolymers;
- (B) a surface treated mineral filler;
- (C) an antioxidant package;
- (D) a zinc-based lubricant; and
- (E) optionally, a titanium dioxide based colorant system.
