ʻO ka plastic kahi mea a mākou e hoʻohana pinepine ai i ko mākou ola i kēlā me kēia lā. E like me ka liʻiliʻi e like me nā ʻeke plastik, nā ʻōmole pēpē, nā hue inu, nā pahu awakea, ka wahī palapū, e like me ka nui o nā kiʻi ʻoniʻoni, nā lako pono, nā mīkini uila, ka paʻi 3D, a ʻo nā rockets a me nā misil hoʻi, aia nā plastics.
ʻO ka plastic kahi lālā nui o nā mea pono polymer, me nā ʻano he nui, nā hua nui a me nā noi ākea. No nā ʻano lula ʻokoʻa, hiki ke hoʻokaʻawale ʻia penei:
1. Wahi a ka lawena ke hoʻomehana ʻia, hiki ke hoʻokaʻawale ʻia nā plastics i thermoplastics a me nā ʻepekema thermosetting e like me kā lākou hana ke hoʻomehana ʻia;
2. Wahi a ke ʻano o ka hopena i ka manawa o ka synthesine o ka kēpau i ka lula, hiki ke hoʻokaʻawale ʻia ka kēpau i nā lula polymerized a me nā polycond licensed plastics;
3. Wahi a ke kūlana hoʻonohonoho o nā macromolecules kēpau, hiki ke hoʻokaʻawale ʻia nā plastics i ʻelua mau ʻano: plastics amorphous a me nā plastic crystalline;
4. Wahi a ka laulā o ka hana a me ka noi ʻana, hiki ke hoʻokaʻawale ʻia nā plastics i nā plastics laulā, nā ʻenekini ʻenekini, a me nā plastics kūikawā.
Ma waena o lākou, ʻo nā plastics kumuhana maʻamau ka hoʻohana ākea ākea i ko mākou ola i kēlā me kēia lā. ʻO nā mea laulā maʻamau e pili ana i nā plastics me ka nui o ka hana, ka hoʻolako ākea, ke kumu kūʻai haʻahaʻa a kūpono hoʻi no nā noi nui. Loaʻa nā plastics laulā i ka hana pono o ka hoʻoheheʻe ʻana, a hiki ke hoʻoheheʻe ʻia i nā huahana no nā kumu like ʻole e nā kaʻina hana like ʻole. ʻO nā plastics laulaha me polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), acrylonitrile / butadiene / styrene (ABS).
I kēia manawa e kamaʻilio nui wau e pili ana i nā waiwai nui a me nā hoʻohana o polyethylene (PE). ʻO Polyethylene (PE) kahi hana maikaʻi a hoʻohana ʻana i nā waiwai, ʻo ia ka laulima i hoʻohana ākea ʻia i nā resins synthetic, a ʻo kāna hana hana ua hoʻonohonoho mua ʻia ma waena o nā ʻano lula āpau. Hoʻokomo nui nā polyethylene resins i ka polyethylene haʻahaʻa haʻahaʻa (LDPE), polyethylene haʻahaʻa haʻahaʻa (LLDPE), a me polyethylene kiʻekiʻe (density).
Hoʻohana ākea ʻo Polyethylene i nā ʻāina like ʻole, a ʻo ke kiʻi ʻoniʻoni kona mea hoʻohana nui loa. Hoʻopau ia ma kahi o 77% o ka polyethylene haʻahaʻa haʻahaʻa a me 18% o ka polyethylene kiʻekiʻe. Hoʻohui ʻia, nā huahana hoʻoheheʻe ʻia, nā uea a me nā kaula, nā huahana hollow, a me nā mea āpau. Ma waena o nā resins kumumanaʻo ʻelima, ʻo ka ʻai o nā PE ke kūlana mua. Hiki ke puhi ʻia ka Polyethylene e hana i nā ʻōmole like ʻole, nā kini, nā pahu hana, nā pahu a me nā ipu ʻē aʻe; ka pahu kui i hoʻoheheʻe ʻia e hana i nā ipuhao, nā barela, nā hīnaʻi, nā hīnaʻi, nā hīnaʻi a me nā ipu o kēlā me kēia lā, nā sundries o kēlā me kēia lā a me nā pono hana, a pēlā aku. extrusion mōlina E hana i nā ʻano paipu, nā kaula, nā olonā, nā monofilament, a pēlā aku. Hoʻohui ʻia, hiki ke hoʻohana ʻia no ka hana ʻana i nā pono uea a me ka uhi uwea a me ka pepa synthetic. Ma waena o nā noi he nui, nā ʻelua mea kūʻai nui o polyethylene nā paipu a me nā kiʻi ʻoniʻoni. Me ka hoʻomohala ʻana i ke kūkulu kūlanakauhale, nā kiʻi ahupuaʻa a me nā meaʻai like ʻole, nā lole a me nā ʻoihana ʻenehana ʻoihana, ʻoi aku ka ākea ka hoʻomohala ʻana o kēia mau māla ʻelua.
