ʻO PLA, i ʻike ʻia he polylactic acid he polymerized mai ka poly lactic acid.ʻO ka polylactic acid he biodegradability maikaʻi loa, kūpono a me ka absorption, he mea ʻawaʻawa ʻole, non synthetic polymer material .lts raw material he polylactic acid, ka mea i loaʻa mai ka fermentation o ka starch, e like me com a me rc.Hiki ke loaʻa mai ka cellulose, ka ʻōpala kīhini a i ʻole ka ʻōpala iʻa.
Loaʻa i ka PLA ka laulā o nā mea maka, a ʻo nā huahana i hana ʻia mai ia mea hiki ke hoʻopili pololei ʻia a i ʻole ke ahi, hiki ke hoʻokō i nā koi o ka hoʻomohala hoʻomau ʻO ka māliko maikaʻi a me kekahi paʻakikī, bio-compatibility a me ka wela o ka PLA ke kumu nui. no kona hoohana nui ia.
Eia kekahi, he thermal-plasticity ka PLA a hiki ke hoʻohana ʻia i nā māla he nui, e like me nā mea hoʻopihapiha, nā mea hoʻopihapiha, a me nā mea ʻē aʻe.
Ke hoʻohālikelike ʻia me nā huahana petrochemical maʻamau, ʻo ka hoʻohana ʻana i ka ikehu i ka hana ʻana o ka polylactic acid he 20% a 50% wale nō o nā huahana petrochemical, a ʻo ka carbon dioxide i hana ʻia he 50% wale nō o nā huahana petrochemical. e hoʻopau i nā pilikia pili honua a me ka ikehu.
Nā hiʻohiʻona o PLA
1. Biodegradability
Ke hoʻohālikelike ʻia me nā plastics kahiko, hiki ke hoʻohaʻahaʻa ʻia ka polylactic acid i CO2 a me H2O e nā microorganism a me ka māmā.ʻAʻole hiki ke hoʻohaumia i ke kaiapuni nā huahana bio-degradation.ʻO ka monomer no ka hana ʻana i ka polylactic, hiki ke fermented e nā mea kanu e like me ka raiki palaoa a me ka beet sugar a i ʻole nā huaʻai ʻano mahiʻai.Hoʻohana nui ʻia ka polylactic acid ma ke ʻano he mea biodegradable e kū nei.
2. Bio-compatibility a Absorb-hiki
Hiki ke hoʻoheheʻe ʻia ka waika polylactic e ka waikawa a i ʻole ka enzyme e hana ai i ka waikawa lactic i loko o ke kino kanaka.Ma keʻano he metabolite o nā pūnaewele, hiki ke hoʻololi houʻia ka polylactic acid e nā enzymes i loko o ke kino, e hana i CO2 a me H2O.No laila, ʻaʻohe mea ʻawaʻawa a me ka pōʻino ʻole o ka waika polylactic i ke kino o ke kanaka, ʻoi aku ka maikaʻi o ka bio-compatibility a me ka bio-absorb-ability, Polylactic acid i hōʻoia ʻia e ka US Food and Drug Administration e hiki ke hoʻohana ʻia ma ke ʻano he bio-material no ka implantation i loko. kanaka.
3. Hiki i ke kino
Ma ke ʻano he thermoplastic polymer material, poly lactic acid he plasticity maikaʻi a me nā waiwai hoʻoili kino, me ka helu hoʻoheheʻe kiʻekiʻe, ka elasticity maikaʻi a me ka maʻalahi, a me ka hiki ke hana wela.Hiki ke hana ʻia nā mea poly lactic acid e like me ka polypropylene (PP), polystyrene (PS), a me ka polypropylene ether resin (PPO), e ka extrusion, stretching, a me ka hoʻoheheʻe ʻana i ka puhi ʻana.
Ka manawa hoʻouna: Nov-03-2022
