text: the inventor of the present report has found after wholeheartedly researching above subject that all kinds of polymer material composites including triallyl isocyanurate compound that is one of multi - functional triazine group compounds , preventing the polymer from cutting , decomposing their chains and forming cross - linkage between polymer chains , and preventing from generation of bad smells and deterioration of mechanical properties by irradiation , although the polymers seem to be impossible caused on producing stage after molding by irradiation . medical material the polymers according to the present invention are selected from both bio - absorbable and undecomposed polymer , and bio - nonabsorbable polymer materials medical materials of bio - absorbable and decomposed polymer according to the present invention , include natural polymers selecting of collagen , gelatin , chitin , chitosan , silk , cellulose , hyaluronic acid , microbe - produced polyester such as poly - β - hydroxybutylate , albumin and dextrin , and bio - absorbable and decomposed synthetic polymers selecting of poly - glutamine , poly glycolic acid , poly - lactic acid , poly caprylic acid , poly dioxanon , tri - methylene carbonate , and their co - polymer such as glycolic acid - caprylic acid copolymer , lactic acidcaprylic acid copolymer , lactic acid - dioxanon copolymer , glycolic acidtri - methylene carbonate copolymer , or poly peptide , poly phosphatase , poly butylene succinate and their blends . on the other hand , as medical material according to present invention , polymer is selected from bio - nonabsorbable and undecomposed polymer materials consisting of poly propylene , poly ethylene , poly amide , poly ester , poly carbonate , poly fluorovinylidene , silicon , poly urethane , natural rubber , synthetic rubber , poly vinylchloride , poly acetal , poly styrene , styrene resin , poly acrylonitrile , poly tetra - fluoro - ethylene , ethylene - vinyl - alcohol copolymer , ethylene - vinylacetate copolymer , poly methylmethacrylate , poly hydroxyethyl methacrylate , and poly sulphone , or their blends . cross - linking agent of the polymer applied in present invention is the multi - functional triazine compound . triallyl isocyanurate , triallyl metha - isocyanurate , triallyl ( 2 , 3 di bromo ) isocyanurate include in triazine compound and triallyl isocyanurate is preferred based on reactive monomer . the triazine compound is added 0 . 01 to 20 weight percent , preferably 0 . 1 to 10 weight percent to the polymer before molding polymer material as fabricating method of medical material . it is preferred to fabricate uniform product quality caused on adding the triazine compound before molding . cross - linking between polymer chains is achieved by irradiation of 10 to 50 kgy at final producing stage after molding . it is not preferred because deterioration starts with higher than 50 kgy irradiation , and sterilization effect is shortage at lower than 10 kgy irradiation . furthermore , it is possible to blend the polymer and known heat stabilizer , antioxidant , ultraviolet absorbent , light stabilizer , colorant , antistat , lubricant , nucleating agent , fire retardant , filler within limit of not spoiling effect of the present invention . for example , it is effective to blend the polymer and antioxidant such as vitamin e or catechin . medical material according to the present invention is the ways in use , employing on suture for operation , artificial blood vessel , bonding agent for broken bone , dental material , wound protector , artificial skin , contact lenses , ocular lenses , artificial ligament , artificial valve , artificial joint scraping parts , mesh , medical non - woven , stint , clip , hotchkiss , artificial dure mater , scafford in tissue regeneration , provender from adhesion , anatomosis splint , disposable hypodermic syringe , catheter , blood bag for infusion , tube , disposable surgical gown and glove , forming product , sheet and filter . the medical materials of the present invention are possible to apply for not only medical uses , but also industrial uses including packing or wrapping . it is possible to improve mechanical properties and bio - decomposability based on irradiation for sterilization and cross - linking between polymer chains at final producing stage after molding in products of the industrial uses . we explain details of the present invention according to following examples , however , not restricting the scope of the invention by the explanation . test procedure of the tensile strength and elongation was performed according to deification of jis l1017 . we have examined the specimen by employing tensile - tester of shimazu auotogragh 100 type , in room maintained constant temperature of 25 ° c ., humidity of 65 rh %, at spacemen length of 250 mm and test speed of 300 mm / min . polypropylene pellet composed of weight - average molecular weight of about 320 , 000 , is added triallyl cyanurate of 2 . 0 weight percent , melt - spinning by simple type spinner and drawing 4 times by warm air circular type stretching machine . produced polypropylene fiber was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further irradiating electron ray of 25 kgy . irradiated fiber showed properties of non - soluble but swelling in heated xylene , and gelation ratio of about 0 . 75 , caused by having cross - linking structure . and tensile strengths and elongations at break of the fiber before and after irradiation , were 5 . 7 g / d and 31 %, and 6 . 1 g / d and 29 %, respectively . polypropylene pellet was melt - spun by simple type spinner , same to example 1 , but without adding triallyl cyanurate , melt - spinning by simple type spinner and drawing 4 times by warm air circular type stretching machine . produced polypropylene fiber was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further irradiating electron ray of 25 kgy . irradiated fiber showed properties of soluble in heated xylene , and gelation ratio of about 0 percent . and tensile strengths and elongations at break of the fiber after irradiation , were 3 . 2 g / d and 21 %. poly vinylidene fluorite pellet composed of weight - average molecular weight of about 680 , 000 , is added triallyl cyanurate of 1 . 0 weight percent , melt - spinning by simple type spinner and drawing 5 times in polyethylene bath at 150 ° c . produced poly vinylidene fluorite fiber was packed in aluminum / polyethylene laminated bag under decompressed pressure , further irradiating co60 γ ray of 25 kgy . irradiated fiber showed properties of non - soluble but swelling in dimethyl formamide , and gelation ratio of about 0 . 68 , caused by having cross - linking structure . and tensile strengths and elongations at break of the fiber before and after irradiation , were 5 . 8 g / d and 27 %, and 6 . 2 g / d and 25 %, respectively . poly vinylidene fluorite pellet was melt - spun by simple type spinner , same to example 2 , but without adding triallyl cyanurate , melt - spinning by simple type spinner and drawing by warm air circular type stretching machine . produced polypropylene fiber was packed in aluminum / polyethylene laminated bag under decompressed pressure , further irradiating co60 γ ray of 25 kgy . irradiated fiber showed properties of soluble in heated dimethyl formamide , and gelation ratio of several percents . and tensile strength and elongation at break of the fiber after γ ray irradiation , were 3 . 9 g / d and 20 %. dried nylon 6 pellet composed of weight - average molecular weight of about 55 , 000 , is added triallyl cyanurate of 0 . 8 weight percent , melt - spinning by simple type spinner and drawing 4 times by sandwiching between 2 heated rollers . produced nylon 6 fiber was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further sterilizing with respect to irradiating electron ray of 25 kgy . irradiated fiber showed properties of non - soluble but swelling in heated m - cresol , and gelation ratio of about 0 . 66 . and tensile strengths and elongations at break of the fiber before and after irradiation , were 6 . 3 g / d and 29 %, and 6 . 8 g / d and 27 %, respectively . nylon 6 pellet was melt - spun by simple type spinner , same to example 3 , but without adding triallyl cyanurate , melt - spinning by simple type . produced nylon 6 fiber was packed in aluminum / polyethylene laminated bag under decompressed pressure , further irradiating electron ray . irradiated fiber showed properties of soluble in heated m - cresol , and gelation ratio of 0 percent . and tensile strength and elongation at break of the fiber after electron ray irradiation , were 5 . 2 g / d and 23 %. dried poly methylmethacrylate pellet composed of weight - average molecular weight of about 120 , 000 , is added triallyl cyanurate of 2 . 0 weight percent , forming columns of 20 mm diameter and 10 cm length by injection molder . after cutting the column to shape of ocular lens , produced poly methlmethacrylate column was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further sterilizing with respect to irradiating co60 γ ray of 25 kgy . irradiated specimen showed properties of non - soluble but swelling in tetrahydrofuran , and gelation ratio of about 0 . 70 . on the contrary , vacuum bag specimen ( comparative example 4 ) that was formed and cut from injected column without adding triallyl cyanurate , and irradiated co60 γ ray of 25 kgy , was happened to turn yellow and bad smell caused on the decomposition , and was deteriorated to show the weight - average molecular weight of about 80 , 000 . dried poly dioxaone ( hexa - fluoro iso propanol hfip ) solution composed of instrinsic viscosity of 2 . 5 , is added triallyl cyanurate of 2 . 5 weight percent , getting monofilament fiber by spinning by simple type spinner , drawing and annealing . produced monofilament fiber was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further sterilizing with respect to irradiating electron ray of 25 kgy . irradiated monofimament fiber showed properties of non - soluble but swelling in heated hfip , and gelation ratio of about 0 . 77 . and tensile strengths and elongations at break of the fiber before and after irradiation , were 7 . 7 g / d and 36 %, and 4 . 8 g / d and 35 %, respectively . poly poly dioxaone was melt - spun by simple type spinner , same to example 5 , but without adding triallyl cyanurate , melt - spinning by simple type spinner , drawing and annealing . produced monofilament fiber was packed in aluminum / polyethylene laminated bag under decompressed pressure , further irradiating electron ray . irradiated monofilament fiber showed properties of soluble in hfip , and gelation ratio of 0 percent . and tensile strengths and elongations at break of the monofimament fiber after electron ray irradiation , were 3 . 1 g / d and 22 %. dried poly l lactide ( plla ) pellet composed of weight - average molecular weight of about 340 , 000 , is added triallyl cyanurate of 1 . 0 weight percent , forming rod columns of 10 mm diameter and 10 cm length by injection molder . after solid - extruding the rod column at 140 ° c . and as extruding ratio of 4 , produced poly l lactide column was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further sterilizing with respect to irradiating co60 γ ray of 25 kgy . irradiated column showed properties of non - soluble but swelling in methylen chrolide and gelation ratio of about 0 . 67 . and bending strengths the column before and after irradiation , were 250 and 260 mpa , respectively . plla was formed by injection molder , same to example 6 , and solid - extruded the rod column but without adding triallyl cyanurate . produced plla was packed in aluminum / polyethylene laminated bag further irradiating co60 γ ray of 25 kgy . irradiated plla showed properties of soluble in methylene chrolide , and gelation ratio of 0 percents . and bending strength after γ ray irradiation , were deteriorated until 180mpa . ultra high molecule poly ethylene ( uhmwpe ) powder composed of weight - average molecular weight of about 4 , 500 , 000 , is added triallyl cyanurate of 1 . 0 weight percent , forming plate of 10 mm thickness by hot - press molder . produced uhmwpe plate was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further sterilizing with respect to irradiating co60 γ ray of 25 kgy . irradiated plate showed properties of non - soluble but swelling in hot tetralin solvent and gelation ratio of about 0 . 79 . and abrasion resistance index evaluated by pin - on - flat tester before and after irradiation , were 0 . 9 (× 10 − 10 g / nm ) and 0 . 2 (× 10 − 10 g / nm ), respectively . further , abrasion resistance index of 0 . 2 was not changed after oxidation test performed at 80 ° c . in ambient air at one week . ultra high molecule poly ethylene ( uhmwpe ) powder composed of weight - average molecular weight of about 4 , 500 , 000 , without adding triallyl cyanurate , was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further sterilizing with respect to irradiating co60 γ ray of 25 kgy . irradiated plate showed properties of non - soluble but swelling in hot tetralin solvent and gelation ratio of about 0 . 58 . and abrasion resistance index evaluated by similar method of example 7 , is 0 . 6 (× 10 − 10 g / nm ), however , abrasion resistance index of 14 was increased after oxidation test . dried poly glycolic acid pellet which showed η sp / c of 1 . 4 at 170 ° c . in solvent mixture of phenol ( 10 ) and 2 . 2 . 6 tri - chloro - phenol ( 7 ) in weight percent ratio , was added triallyl iso - cyanurate of 1 . 0 wt . percent , melt - spinning by simple type spinner , drawing , annealing and fabricating multifilament yarn . produced multifilament yarn was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further irradiating electron ray of 25 kgy . irradiated multifilament yarn showed properties of non - soluble but swelling in solvent mixture at 170 ° c . and gelation ratio of about 0 . 48 . and tensile strengths and elongations at break of the fiber before and after irradiation , were almost same values of 7 . 2 g / d and 22 %. dried poly glycolic acid pellet added no triallyl iso - cyanurate , melt - spinning by simple type spinner , packing in aluminum / polyethylene laminated bag , showed the degradation of tensile strength and elongation at break as 3 . 8 g / d and 17 %. dried lactic acid and caproic acid copolymer pellet composed of weight - average molecular weight of about 420 , 000 , was added triallyl iso - cyanurate of 1 . 0 wt . percent and vitamin e of 0 . 2 wt / percent , melt - spinning by simple type spinner , drawing , annealing and fabricating monofilament yarn . produced monofilament yarn was packed in aluminum / polyethylene laminated bag replaced by nitrogen gas , further irradiating electron ray of 25 kgy . irradiated monofilament yarn showed properties of non - soluble but swelling in chloroform and gelation ratio of about 0 . 53 . and tensile strengths and elongations at break of the fiber before and after irradiation , were almost same values of 5 . 7 g / d and 36 %. dried lactic acid and caproic acid copolymer adding no triallyl iso - cyanurate , melt - spinning by simple type spinner , packing in aluminum / polyethylene laminated bag , showed the degradation of tensile strength and elongation at break until 2 . 9 g / d and 21 %.