Ka hopena o nā antioxidants ma nā ʻano kino ʻehā o ka polypropylene (PP)

Hoʻohui ʻia ka antioxidant i nā mea plastik, e kāohi pono a hōʻemi paha i ka wikiwiki o ka hopena oxidation thermal o nā macromolecules plastik, hoʻomaikaʻi nui i ke kūpaʻa wela o nā mea plastik, hoʻopaneʻe i ka hōʻino ʻana o nā mea plastik, ke kaʻina hana ʻelemakule, hoʻolōʻihi i ke ola lawelawe o nā huahana plastik, a hoʻomaikaʻi i ka waiwai o nā mea hoʻohui plastik i nā huahana plastik.

ʻO nā antioxidants nā mea hoʻohui i hoʻohana nui ʻia i nā plastics. ʻO kekahi o nā mea i hoʻohana nui ʻia e pili ana i ka hoʻopili ʻana o nā antioxidants i nā pae like ʻole o ka polymerization a me ka synthesis plastics, granulation, storage, processing, a me ka hoʻohana ʻana. ʻO ka lua o nā mea i hoʻohana nui ʻia, e pili ana i ka honua i kēia lā ua ʻike ʻia i nā ʻano ʻano molekala like ʻole o nā ʻano mea plastic, e like me ka polyethylene, polypropylene, styrene polymers, engineering plastics, modified plastics a me nā mea ʻē aʻe, ka hoʻopili ʻana o nā antioxidants i ka hapa nui o nā ʻano mea plastic. ʻO kā mākou huahana kaea laina extrusion paipuhe kūpono no ka extrusion wikiwiki o HDPE, PP a me nā paipu polyolefin ʻē aʻe.

ʻO ka hapa nui, ua māhele ʻia nā antioxidants plastik i ʻehā mau māhele e like me ke ʻano molekala a me ke ʻano o ka hana: nā phenols i hoʻopaʻa ʻia, phosphite, thio a me ka hui.

Nā mea e pili ana i nā antioxidants ma nā mea polymeric
Pono e loiloi ʻia a hōʻoia ʻia ke kūpono o ke koho ʻana o ka ʻōnaehana antioxidant i loko o nā polymers, a no ka mea e nānā i kāna hana noi, pono e nānā i nā loli i ka hana e pili ana i kona hoʻohui ʻia ʻana i ka polymer. No nā mea polypropylene polymeric, ma muli o ko lākou mau ʻano ponoʻī, ua nānā nui ʻia nā waiwai ma lalo nei.

01 Helu hoʻoheheʻe a i ʻole ka mānoanoa
ʻO ka helu hoʻoheheʻe he hōʻailona koʻikoʻi ia o ka hana hana o ka resin polypropylene, a hoʻohana pinepine ʻia ke ʻano helu hoʻoheheʻe e loiloi i ke kūpaʻa hana o nā mea polymeric i pale ʻia e antioxidant. ʻO ka nui o ka loli o ka helu hoʻoheheʻe ma mua a ma hope o ka hana ʻana, ʻoi aku ka ʻino o ke kūpaʻa hana o ka mea. No laila, ua nānā ʻia ka loli o ka helu hoʻoheheʻe o ka ʻōnaehana antioxidant stabilizer ma hope o kekahi mau extrusions.

02 Papa Kuhikuhi Melemele
I ke kaʻina hana, hiki i ka hanana ʻelemakule wela ke hoʻohui ʻia me ka antioxidant nui e kāohi i ka hoʻohaʻahaʻa ʻana o ka polypropylene i ka manawa like me ka hoʻokumu ʻana o nā quinone chromophores, i mea e melemele ai ke kala o ka huahana. No laila, ua hoʻopaʻa ʻia ka ʻōnaehana polypropylene me ka hoʻohui ʻana o nā antioxidants, ma hope o kekahi mau extrusions me ka hoʻololi ʻana i ka helu melemele e loiloi i ka hopena o nā antioxidants i ka hiki ke hana polypropylene.

03 Ka wā hoʻokomo ʻokikene
ʻO ka manawa hoʻokomo oxidation ka manawa no ka polymer e hana me ka oxygen ma ke kaulahao auto-oxidation ma lalo o kekahi mau kūlana a hōʻike i ka maʻalahi o ka polypropylene e hana me ka oxygen ma kahi mahana (200°C). ʻO ka nui o ka manawa hoʻokomo oxidation, ʻoi aku ka maikaʻi o ka ʻōnaehana i ka pale ʻana i ka hoʻokumu ʻia ʻana o nā radical manuahi ma nā mahana kiʻekiʻe. Ke hana ʻia nā radical manuahi i loko o ka polypropylene, hoʻopili koke ʻia ka oxygen a hana ʻia kahi hopena auto-oxidation kaulahao. Ua hoʻāʻo ʻia ʻehā mau ʻōnaehana hoʻopaʻa antioxidant ma DSC me ka pauka polypropylene ma hope o ka extrusion mua ʻana o nā pellets no ka manawa hoʻokomo oxidation, a ua hōʻike ʻia nā hopena ma ka Papa 3.

04 Ka ʻelemakule lōʻihi e kū'ē i ka wela a me ka oxygen
ʻO ka hana ʻelemakule pale wela a me ka oxygen no ka manawa lōʻihi ka hana nui o ka mea plastik anti-aging a i ʻole ka wā ʻino, ʻo ka hana anti-UV a i ʻole anti-light aging kahi hana i hoʻomaikaʻi ʻia ma luna o ka hana nui. No nā huahana plastik i hoʻololi ʻia i hoʻohana ʻia ma waho, ʻo ka hui pū ʻana o ka ʻōnaehana antioxidant kūpono a me ka nui o ka hoʻohui kūpono i ka ʻōnaehana hoʻopaʻa kukui hiki ke hoʻomaikaʻi iki i ka hopena hoʻopaʻa kukui lōʻihi a i ʻole ka hopena o nā huahana.

Hōʻike nā ʻikepili hoʻokolohua ma luna nei he ʻokoʻa nā hopena o nā ʻōnaehana antioxidant like ʻole ma ka helu hoʻoheheʻe a i ʻole ka viscosity, ka helu melemele, ka manawa hoʻokomo oxidation, a me ka ʻelemakule oxygen wela lōʻihi o ka mea. Koho nā Polymers i ke ʻano o ka ʻōnaehana antioxidant, me nā ʻano maʻamau, nā koi huahana like ʻole, nā ʻano hana limahana, nā kumu o nā kahawai, a me nā mea ʻē aʻe e hoʻopilikia i ke koho a ka poʻe, akā koho i ka antioxidant kūpono loa, pono ka poʻe e hoʻomau i ka hoʻokolohua a me ka hana hana, akā hilinaʻi hoʻi i nā limahana ʻepekema a me nā loea e hoʻomohala i nā ʻano antioxidants hou.

No nā limahana loea i ka ʻoihana polymer, i ka wā e hana ana i ka noiʻi formulation, pono lākou e koho i nā antioxidants kūpono a me nā hui antioxidant ma o ka nui o nā hoʻokolohua e hoʻomohala i nā mea kūpono.

Ua hoʻokumu ʻia ʻo Jwell ma 1997, China Plastics Machinery Industry Association vice president unit, mea hoʻoheheʻe plastic, nā hoʻonohonoho piha o nā mea hana lako e wili ana i ka fiber kemika. Loaʻa iā mākou nā huahana he nui, e like memīkini hana lula eaamīkini hoʻoheheʻe paipu, a pēlā aku. Inā makemake ʻoe, e ʻoluʻolu e kelepona mai iā mākou mea hana mīkini extrusion pepa.