Radiation shielding phenolic fibers and method of producing same
AssigneeKanebo, Ltd.
InventorKoichiro Ohtomo
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Abstract
A radiation shielding phenolic fiber comprising (A) a filamentary phenolic polymer consisting predominantly of a sulfonic acid group-containing cured novolak resin and (B) a metallic atom having a great radiation shielding capacity, the metallic atom being incorporated in the polymer by being chemically bound in the ionic state in the novolak resin; a fibrous material, such as fibers, yarns, knit fabrics, woven fabrics, non-woven fabrics, felt, mat, composed of the aforesaid radiation shielding phenolic fiber; and a method for the production thereof.
Claims11
A radiation shielding phenolic fiber comprising (A) a filamentary phenolic polymer consisting predominantly of a sulfonic acid group-containing cured novolak resin wherein said novolak resin contains 0.1-4.0 meq/g-fiber of the sulfonic acid group and is cured to a curing degree of 5-30% and (B) 0.1-3.5 meq/g-fiber of a metallic atom having a great radiation shielding capacity, said metallic atom having an atomic number of at least 13 and being incorporated in said polymer by being chemically bound in the ionic state in said novolak resin.
A filamentary structure in a form selected from the group consisting of fibers, yarns, knit fabrics, woven fabrics, nonwoven fabrics, felt, mat and the like, said structure being composed of a filamentary material derived from a radiation shielding phenolic fiber comprising (A) a filamentary phenolic polymer consisting predominantly of a sulfonic acid group-containing cured novolak resin wherein said novolak resin contains 0.1-4.0 meq/g-fiber of the sulfonic acid group and is cured to a curing degree of 5-30% and (B) 0.1-3.5 meq/g-fiber of a metallic atom having a great readiation shielding capacity, said metallic atom having an atomic number of at least 13 and being incorporated in said polymer by being chemically bound in the ionic state in said novolak resin.
Dependencies are inferred from the claim text.