Artificial hair for implantation and process for producing the same
OwnerShiro Yamada, Yoshito Ikadainventors
Life of this patent
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Abstract
An artificial hair having a physiologically active surface which is formed by a such manner that protein (collagen) molecules are bonded chemically to the graft-polymerized chains introduced onto the surface of the artificial hair. When the artificial hair is implanted into a human body skin, the collagen layer 11 fixed to the surface of the artificial hair having a root part 12 is integrally assimilated and bonded to collagens in the epidermis 4, the corium layer 5, the subcutaneous tissue 6 and the galea 7, whereby the artificial hair can be firmly fixed. Thus, this artificial hair exhibits a low infection rate, a high success rate and cannot be accompanied by down-growth phenomenon.
Claims11
A process for producing an artificial hair for implantation, formed from a monofilament of a synthetic polymer fiber, said process comprising the steps of:
- introducing a graft-polymerized polymer chain onto a surface of the artificial hair by applying ionizing radiation or ultraviolet rays which produce free radicals in the surface of the artificial hair under a condition in which the artificial hair has been immersed in a solution of a radical-polymerizable monomer selected from the group consisting of a carboxyl group-containing monomer and a sulfonic group-containing monomer;
- chemically bonding protein molecules to said graft-polymerized chain;
- and
- bonding the protein molecules chemically bonded to said graft-polymerized chain to one another, or to additionally added protein molecules by cross-linking to form a biologically compatible layer on the surface of the artificial hair.
A process for producing an artificial hair for implantation, formed from a monofilament of a synthetic polymer fiber, said process comprising the steps of
- introducing graft-polymerized polymer change onto a surface of the artificial hair in the presence of a deoxygenating agent;
- chemically bonding protein molecules to said graft-polymerized chain;
- and
- bonding the protein molecules chemically bonded to said graft-polymerized chain to one another, onto additionally added protein molecules by cross-linking to form a biologically compatible layer on the surface of the artificial hair.
A process for producing an artificial hair for implantation, formed from a monofilament of a synthetic polymer fiber, said process comprising the steps of
- introducing a graft-polymerized polymer chain onto a surface of the artificial hair;
- chemically bonding protein molecules to said graft-polymerized chain by utilizing an ionic bonding reaction;
- and
- bonding the protein molecules chemically bonded to said graft-polymerized chain to one another, onto additionally added protein molecules by cross-linking to form a biologically compatible layer on the surface of the artificial hair.
In an artificial hair for implantation, formed from a monofilament of a synthetic polymer fiber and having a loop (12) and a hook (13) at one end thereof, the improvement wherein said artificial hair includes a biologically compatible layer on an outer surface thereof, said biologically compatible layer comprising a protein fixed to said synthetic polymer by chemical bonding.
Dependencies are inferred from the claim text.