Laundering process for dual bleaching stained fabrics

Details Laundering process for dual bleaching stained fabrics Laundering process for dual bleaching stained fabrics

1977-12-05

1978-10-17

Schulz, William E.

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

Chemical

8111, 8137, 252 95, D06L 306

Patent

active

041206509

ABSTRACT:
Stained textile fabrics, especially cotton-polyester, rayon-polyester blends stained in use with blood stains, can be reclaimed and returned to use by the process of washing and bleaching said fabrics in the presence of a non-ionic or anionic surface-active agent, together with an oxygen-releasing bleaching agent and a chlorine-releasing bleaching agent, said bleaching agents used either successively or simultaneously. The laundering process involves the use of aqueous solutions of bleaching agents at elevated temperatures and at high pH. The process of the invention provides a synergistic improvement in the removal of stains as compared with the use of either an oxygen-releasing bleaching agent or a chlorine-releasing bleaching agent. The process can include a hot aqueous acid sour treatment to remove rust stains and an aqueous sour to neutralize alkalies in the bleached fabric. The treatment can be completed in a period of time of about 30 to about 90 minutes.

REFERENCES:
patent: 3077372 (1963-02-01), Smolens et al.
patent: 3265462 (1966-08-01), Rogers
patent: 3281202 (1966-10-01), Helmick et al.
patent: 3481684 (1969-12-01), Sando et al.

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