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He aha ka ʻokoʻa ma waena o nā ʻano polypropylene?

ʻO ka Polypropylene (PP) kahi thermoplastic crystalline paʻa i hoʻohana ʻia i nā mea o kēlā me kēia lā.Loaʻa nā ʻano like ʻole o ka PP: homopolymer, copolymer, hopena, a me nā mea ʻē aʻe. Ke hana maikaʻi nei kona mau ʻano mechanical, physical, a me ke kemika i nā noi mai ka automotive a me ka lāʻau lapaʻau i ka hoʻopili.

He aha ka Polypropylene?
Hana ʻia ka polypropylene mai ka monomer propene (a i ʻole propylene).He resin hydrocarbon laina laina.ʻO ke kumu kemika o ka polypropylene (C3H6)n.ʻO PP kekahi o nā plastics cheap loa i loaʻa i kēia lā, a ʻo ia ka haʻahaʻa haʻahaʻa loa ma waena o nā plastics commodity.Ma ka polymerization, hiki i ka PP ke hana i ʻekolu mau kaulahao kumu ma muli o ke kūlana o nā pūʻulu methyl:

Atactic (aPP).Hoʻonohonoho pūʻulu methyl ʻole (CH3).

Atactic (aPP).Hoʻonohonoho pūʻulu methyl ʻole (CH3).
Isotactic (iPP).Hoʻonohonoho ʻia nā hui methyl (CH3) ma kekahi ʻaoʻao o ke kaulahao kalapona
Syndiotactic (sPP).Hoʻonohonoho pūʻulu methyl (CH3).
No ka ʻohana polyolefin o nā polymers ʻo PP a ʻo ia kekahi o nā polymers i hoʻohana nui ʻia i kēia lā.Loaʻa i ka Polypropylene nā noi—ma ke ʻano he plastic a me ka fiber—i ka ʻoihana kaʻa, nā noi ʻoihana, nā mea kūʻai aku, a me ka mākeke lako.

Nā ʻano like ʻole o ka Polypropylene
ʻO nā homopolymers a me nā copolymers nā ʻano nui o ka polypropylene i loaʻa ma ka mākeke.

Homopolymer propyleneʻo ia ka papa hana maʻamau i hoʻohana nui ʻia.He propylene monomer wale nō i loko o kahi ʻano paʻa semi-crystalline.ʻO nā noi nui e pili ana i ka ʻeke, textiles, mālama olakino, paipu, automotive, a me nā noi uila.
Polypropylene copolymerua māhele ʻia i nā copolymers random a me nā copolymers poloka i hana ʻia e ka polymerizing o ka propene a me ka ethane:

1. Hoʻokumu ʻia ka propylene random copolymer ma o ka hoʻohui ʻana i ka ethene a me ka propene.Loaʻa iā ia nā ʻāpana ethene, maʻamau a hiki i ka 6% ma ka nuipa, i hoʻohui ʻia i loko o nā kaulahao polypropylene.ʻO kēia mau polymers he maʻalahi a maʻalahi hoʻi, e kūpono iā lākou no nā noi e koi ana i ke aniani a no nā huahana e koi ana i kahi hiʻohiʻona maikaʻi loa.
2. Loaʻa i ka propylene block copolymer kahi maʻiʻo ethene kiʻekiʻe (ma waena o 5 a me 15%).Loaʻa iā ia nā ʻāpana co-monomer i hoʻonohonoho ʻia ma ke ʻano maʻamau (a i ʻole nā ​​poloka).ʻO ke kumu maʻamau e ʻoi aku ka paʻakikī o ka thermoplastic a ʻoi aku ka palupalu ma mua o ka co-polymer random.Kūpono kēia mau polymers no nā noi e koi ana i ka ikaika kiʻekiʻe, e like me ka hoʻohana ʻana i nā ʻoihana.

ʻO kekahi ʻano polypropylene he copolymer hopena.ʻO kahi propylene homopolymer i loaʻa i kahi propylene random copolymer phase i hui pū ʻia me ka ethylene maʻiʻo o 45-65% e kuhikuhi ʻia i ka PP impact copolymer.Hoʻohana nui ʻia nā copolymers hopena i ka hoʻopili ʻana, nā mea hale, nā kiʻiʻoniʻoni, a me nā noi paipu, a me nā ʻāpana automotive a me nā uila.

Polypropylene Homopolymer vs. Polypropylene Copolymer
Homopolymer propyleneHe kiʻekiʻe ka ikaika-a-kaumaha ratio, a ʻoi aku ka ʻoi aʻe o ka ʻoi aku ka ikaika ma mua o ka copolymer.ʻO kēia mau waiwai i hui pū ʻia me ke kūpaʻa kemika maikaʻi a me ka weldability e lilo ia i mea i koho ʻia i loko o nā hale kūpaʻa corrosion.
Polypropylene copolymerʻoi aku ka palupalu akā ʻoi aku ka ikaika o ka hopena.ʻOi aku ka paʻakikī a ʻoi aku ka lōʻihi ma mua o ka propylene homopolymer.ʻOi aku ka maikaʻi o ka pale ʻana i ke koʻikoʻi a me ka haʻahaʻa haʻahaʻa o ka wela ma mua o ka homopolymer me ka hoʻemi liʻiliʻi o nā waiwai ʻē aʻe.

Nā noi PP Homopolymer a me PP Copolymer
Aneane like na noi ma muli o ka nui o ko lakou mau waiwai.ʻO ka hopena, ua hana pinepine ʻia ka koho ma waena o kēia mau mea ʻelua ma muli o nā pae ʻenehana ʻole.

ʻO ka mālama ʻana i ka ʻike e pili ana i nā waiwai o kahi thermoplastic ma mua he pono mau.Kōkua kēia i ke koho ʻana i ka thermoplastic kūpono no kahi noi.He kōkua nō hoʻi i ka loiloi ʻana i ka hoʻohana hope ʻana e hoʻokō ʻia a ʻaʻole paha.Eia kekahi mau waiwai nui a me nā pono o ka polypropylene:

Ka helu hehee o polypropylene.Aia ka helu hehee o ka polypropylene ma kahi ākea.
● Homopolymer: 160-165°C
● Copolymer: 135-159°C

ʻO ka nui o ka polypropylene.ʻO PP kekahi o nā polymers māmā loa ma waena o nā plastic commodity āpau.Hana kēia hiʻohiʻona i koho kūpono no nā noi māmā/kaumaha--hoʻōla.
● Homopolymer: 0.904-0.908 g/cm3
● Kopolymer random: 0.904-0.908 g/cm3
● Kopolymer hopena: 0.898-0.900 g/cm3

Ke kūʻē kemika polypropylene
● Kūʻē maikaʻi loa i nā ʻakika i hoʻoheheʻe ʻia a paʻa, nā waiʻona, a me nā kumu
● Kūʻē maikaʻi i nā aldehydes, esters, aliphatic hydrocarbons, a me nā ketones
● Kūʻē palena ʻole i nā hydrocarbons ʻala a me ka halogenated a me nā mea oxidizing

Nā waiwai ʻē aʻe
● Mālama ʻo PP i nā waiwai mechanical a me ka uila ma nā wela kiʻekiʻe, ma nā kūlana haʻahaʻa, a i ka wā e hoʻoheheʻe ʻia i ka wai.He plastik pale wai
● He kūʻē maikaʻi ʻo PP i ke koʻikoʻi o ke kaiapuni a me ka haki ʻana
● He mea maʻalahi ia i nā hōʻeha microbial (bacteria, mold, etc.)
● Hōʻike ʻo ia i ke kūpaʻa maikaʻi i ka sterilization mahu

ʻO nā mea hoʻohui polymer e like me nā mea hoʻomaʻemaʻe, nā mea pale ahi, nā fibers aniani, nā minerala, nā mea hoʻopiha conductive, nā lubricants, nā puaʻa, a me nā mea hoʻohui ʻē aʻe e hiki ke hoʻomaikaʻi hou i nā waiwai kino a / a i ʻole nā ​​​​mea hoʻonaninani PP.No ka laʻana, he maikaʻi ʻole ka PP i ka UV, no laila ʻo ka hoʻokūpaʻa māmā me nā amine i hoʻopaʻa ʻia e hoʻonui ai i ke ola lawelawe e like me ka polypropylene unmodified.

p2

Nā hemahema o ka Polypropylene
Ke kū'ē maikaʻiʻole i ka UV, ka hopena, a me nā'ōpala
Embrittles ma lalo o -20°C
Haʻahaʻa wela lawelawe luna, 90-120°C
Hoʻouka ʻia e nā ʻakika oxidizing nui, pehu wikiwiki i nā solvents chlorinated a me nā mea ʻala
Hoʻopilikia maikaʻi ʻia ke kūpaʻa ʻana o ka wela ma ka hoʻopili ʻana me nā metala
Hoʻololi ʻia ma hope o ka hoʻololi ʻana ma muli o nā hopena crystallinity
ʻAʻole pili ka pena

Nā noi o ka Polypropylene
Hoʻohana nui ʻia ka Polypropylene i nā noi like ʻole ma muli o kona kūpaʻa kemika maikaʻi a me ka weldability.ʻO kekahi mau hoʻohana maʻamau o ka polypropylene penei:

Nā Palapala Hoʻopili
ʻO nā waiwai pale maikaʻi, ikaika kiʻekiʻe, hoʻopau ʻili maikaʻi, a me nā kumu kūʻai haʻahaʻa e kūpono ai ka polypropylene no nā noi hoʻopili.

Hoʻopili hikiwawe.ʻO nā kiʻi PP ʻoniʻoni maikaʻi maikaʻi loa a me ka haʻahaʻa haʻahaʻa o ka moisture-vapor transmission i kūpono no ka hoʻohana ʻana i ka ʻeke meaʻai.Aia nā mākeke ʻē aʻe i ka overwrap kiʻiʻoniʻoni, nā kiʻi ʻoniʻoni uila, nā noi kiʻi kiʻi, a me nā ʻaoʻao diaper a me nā pani.Loaʻa ka kiʻiʻoniʻoni PP ma ke ʻano he kiʻi kiʻiʻoniʻoni a i ʻole bi-axially orientated PP (BOPP).

Puke paʻa.Hoʻopili ʻia ʻo PP e hana i nā pahu, nā ʻōmole, a me nā ipu.Hoʻohana mau ʻia nā ipu pā lahilahi PP no ka hoʻopili meaʻai.

Consumer waiwai.Hoʻohana ʻia ka Polypropylene i nā huahana hale a me nā noi mea kūʻai aku, me nā ʻāpana translucent, nā lako hale, nā lako, nā mea hana, nā ukana, a me nā mea pāʻani.

Nā polokalamu kaʻa.Ma muli o kona kumukūʻai haʻahaʻa, nā waiwai mechanical koʻikoʻi, a me ka moldability, hoʻohana nui ʻia ka polypropylene i nā ʻāpana kaʻa.ʻO nā noi nui e pili ana i nā pahu pākaukau a me nā pā, nā bumpers, nā laina fender, nā ʻoki kūloko, nā panela mea kani, a me nā ʻoki puka.ʻO nā hiʻohiʻona koʻikoʻi ʻē aʻe o nā noi kaʻa o PP e pili ana i ka coefficient haʻahaʻa o ka hoʻonui ʻana i ka wela laina a me ka gravity kikoʻī, ke kūpaʻa kemika kiʻekiʻe a me ka maikaʻi o ka weatherability, ka hana ʻana, a me ke koena o ka hopena / stiffness.

Nā pulupulu a me nā lole.Hoʻohana ʻia ka nui o ka PP ma ka māhele mākeke i kapa ʻia ʻo nā fibers a me nā lole.Hoʻohana ʻia ka fiber PP i ka nui o nā noi, me ka raffia/slit-film, tape, strapping, bulk continuous filament, staple fibers, spun bond, a me ka filament mau.ʻO ke kaula PP a me ka twine he ikaika loa a kūpaʻa i ka wai, kūpono loa no nā noi kai.

Nā noi lapaʻau.Hoʻohana ʻia ka Polypropylene i nā noi lapaʻau like ʻole ma muli o ke kiʻekiʻe kiʻekiʻe a me ka pale ʻana i ka bacteria.Eia kekahi, hōʻike ka lāʻau lapaʻau PP i ke kūpaʻa maikaʻi i ka sterilization mahu.

ʻO nā syringes hiki ke hoʻohana ʻia ka lāʻau lapaʻau maʻamau o ka polypropylene.ʻO nā noi ʻē aʻe e pili ana i nā hue lāʻau lapaʻau, nā mea diagnostic, nā kīʻaha petri, nā ʻōmole intravenous, nā ʻōmole specimen, nā pā meaʻai, nā pā, a me nā ipu pila.

Nā noi ʻenehana.Hoʻohana nui ʻia nā ʻāpana polypropylene i ka ʻoihana ʻoihana e hana i nā pahu waika a me nā kemika, nā pepa, nā paipu, Returnable Transport Packaging (RTP), a me nā huahana ʻē aʻe ma muli o kāna mau waiwai e like me ka ikaika tensile kiʻekiʻe, ke kū'ē i nā mahana kiʻekiʻe, a me ka pale ʻana i ka corrosion.

ʻO ka PP he 100% hiki ke hana hou.ʻO nā pahu pākahiko kaʻa, nā kukui hōʻailona, ​​nā uwea pākaukau, nā brooms, nā pulupulu, a me nā ʻōpala hau kekahi mau laʻana o nā huahana i hiki ke hana ʻia mai ka polypropylene recycled (rPP).

ʻO ke kaʻina hana hoʻopōmaikaʻi PP ka mea nui i ka hoʻoheheʻe ʻana i ka palaka ʻōpala i ka 250°C no ka hoʻopau ʻana i nā mea haumia a ukali ʻia e ka wehe ʻana i nā molekala i koe ma lalo o ka ʻūhā a me ka paʻa ʻana ma kahi kokoke i 140 °C.Hiki ke hoʻohui ʻia kēia PP recycled me ka PP puʻupaʻa ma ka helu a hiki i 50%.ʻO ka paʻakikī nui o ka hoʻopōmaikaʻi ʻana o PP e pili ana i ka nui o ka pau ʻana—ʻaneʻane kokoke i ka 1% o nā hue PP i hana hou ʻia, ke hoʻohālikelike ʻia me ka 98% recycling rate o nā ʻōmole PET & HDPE.

Manaʻo ʻia ka hoʻohana ʻana i ka PP no ka mea ʻaʻohe hopena maikaʻi loa mai kahi ʻike olakino a me ka palekana o ka hana, ma ke ʻano o ka ʻona kemika.No ka ʻike hou aku e pili ana iā PP e nānā i kā mākou alakaʻi, e pili ana i ka hoʻoponopono ʻana i ka ʻike a me nā mea hou aku.


Ka manawa hoʻouna: Jul-03-2023