Alginic

Details Alginic Alginic

1989-12-01

1992-01-14

Pellegrino, Stephen C.

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

604376, 536 3, 428224, 428296, A61F 1315, D03D 300, D04H 104

Patent

active

050806572

ABSTRACT:
This invention is a catamenial pad or a tampon or a diaper which contains carboxymethylalginate (CMA) and alginic acid salt. The pad or diaper can be made from fibers composed of CMA alone or a mixture of CMA and alginic acid salt. CMA may be prepared by reacting chloroacetic acid, NaOH, and an alginic acid salt dispersed in a liquid aliphatic alcohol. More in detail, CMA can be prepared by a reaction in which sodium alginate is dispersed into ethanol, reacted with NaOH and chloroacetic acid at 40.degree.-50.degree.C. with agitation. The CMA can be spun into fibers and then it can be prepared into non-woven fabric. The fabric pad or diaper can be made into various designs. The fabric or the fiber has high absorbency, water-retentivity, stability, and coagulating ability against blood.

REFERENCES:
patent: 2688586 (1950-03-01), Eberl et al.
patent: 2902479 (1959-09-01), McNeely et al.
patent: 3521638 (1970-07-01), Parrish
patent: 3756232 (1973-09-01), Noguchi et al.

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