ʻO ka Polypropylene (PP) kahi polymer hoʻohui thermoplastic i hana ʻia mai ka hui pū ʻana o nā monomers propylene.Loaʻa iā ia kahi ākea o nā noi, me ka hoʻopili huahana mea kūʻai aku, nā ʻāpana plastik no ka ʻoihana kaʻa, a me nā textiles.Ua hana mua nā kānaka ʻepekema ʻo Philip Oil Company ʻo Paul Hogan lāua ʻo Robert Banks i ka polypropylene i ka makahiki 1951, a ma hope mai ua hana nā ʻepekema Italia a me Kelemania ʻo Natta lāua ʻo Rehn i ka polypropylene.Ua hoʻomaʻemaʻe a hoʻohui ʻia ʻo Natta i ka huahana polypropylene mua loa ma Sepania i ka makahiki 1954, a ua hoʻāla ʻia ka hoihoi nui ʻana i kona hiki ke crystallization.Ma ka makahiki 1957, ua piʻi ka kaulana o ka polypropylene, a ua hoʻomaka ka hana pāʻoihana nui ma ʻEulopa.I kēia lā, ua lilo ia i hoʻokahi o nā plastics i hoʻohana pinepine ʻia ma ka honua.
ʻO kahi pahu lāʻau lapaʻau i hana ʻia me ka PP me kahi poʻi hinged
Wahi a nā hōʻike, ʻo ka noi honua i kēia manawa no nā mea PP ma kahi o 45 miliona tons i kēlā me kēia makahiki, a ua manaʻo ʻia e piʻi ka noi ma kahi o 62 miliona tons ma ka hopena o 2020. ʻO ka noi nui o ka PP ʻo ia ka ʻoihana paʻa, kahi. e pili ana i ka 30% o ka huina hoohana.ʻO ka lua o ka hana uila a me nā mea hana, e hoʻopau ana ma kahi o 26%.ʻO nā mea hana hale a me nā ʻoihana kaʻa e pau i ka 10%.Hoʻopau ka ʻoihana kūkulu hale i ka 5%.
He ʻili maʻemaʻe ka PP, hiki ke hoʻololi i kekahi mau huahana plastik ʻē aʻe, e like me nā pahu a me nā pā lako i hana ʻia me POM.He mea paʻakikī hoʻi ka ʻili maʻalahi no ka pili ʻana o PP i nā wahi ʻē aʻe, ʻo ia hoʻi, ʻaʻole hiki ke hoʻopaʻa paʻa ʻia ʻo PP me ke kāpili ʻenehana, a i kekahi manawa pono e hoʻopaʻa ʻia e ka wili.Ke hoʻohālikelike ʻia me nā plastics ʻē aʻe, loaʻa iā PP nā hiʻohiʻona o ka haʻahaʻa haʻahaʻa, hiki ke hōʻemi i ke kaumaha no nā mea hoʻohana.He kūpaʻa maikaʻi loa ka PP i nā mea hoʻoheheʻe organik e like me ka momona i ka lumi wela.Akā, maʻalahi ka PP i ka oxidize i ke kiʻekiʻe wela.
ʻO kekahi o nā pōmaikaʻi nui o PP ʻo kāna hana hoʻoponopono maikaʻi loa, hiki ke hana ʻia e ka hoʻoheheʻe ʻana a i ʻole ka hana CNC.No ka laʻana, i loko o ka pahu lāʻau lapaʻau PP, hoʻopili ʻia ka poʻi i ke kino o ka hue e kahi hinge ola.Hiki ke hana pololei ʻia ka pahu pila e ka hoʻoheheʻe ʻana a i ʻole CNC.ʻO ka hinge ola e hoʻopili ana i ka poʻi he pepa ʻilika lahilahi loa ia, hiki ke hoʻowili pinepine ʻia (neʻe ma kahi ākea kokoke i 360 degere) me ka haki ʻole.ʻOiai ʻaʻole hiki i ka hinge ola i hana ʻia i ka PP ke amo i ka ukana, kūpono loa ia no ka pāpale omole o nā mea e pono ai i kēlā me kēia lā.
ʻO kekahi pōmaikaʻi o PP ʻo ia ka hiki ke maʻalahi i ka copolymerized me nā polymers ʻē aʻe (e like me PE) e hana i nā plastic composite.Hoʻololi nui ka copolymer i nā waiwai o ka mea, a hiki ke hoʻokō i nā noi ʻenehana ikaika i hoʻohālikelike ʻia me ka PP maʻemaʻe.
ʻO kekahi noi hiki ʻole ke hiki ke hana ʻo PP ma ke ʻano he mea palaka a me kahi mea fiber.
ʻO nā hiʻohiʻona ma luna nei, hiki ke hoʻohana ʻia ka PP i nā noi he nui: nā papa, nā pā, nā kīʻaha, nā ʻeke lima, nā ipu plastik opaque a me nā mea pāʻani he nui.
ʻO nā hiʻohiʻona nui o ka PP penei:
Ke kū'ē kemika: ʻAʻole i hoʻopili ʻia nā alkalis a me nā waikawa i hoʻoheheʻe ʻia me ka PP, kahi e hana ai i ipu kūpono no ia mau wai (e like me nā detergents, nā huahana kōkua mua, etc.).
ʻO ka elasticity a me ka paʻakikī: He elasticity ka PP i loko o kekahi ʻano o ka deflection, a e hana i ka deformation plastic me ka ʻole o ka haki ʻana i ka wā mua o ka deformation, no laila ua manaʻo ʻia ʻo ia he mea "paʻakikī".ʻO ka paʻakikī kahi huaʻōlelo ʻenekinia i wehewehe ʻia e like me ka hiki o kahi mea ke hoʻoheheʻe (ka hoʻololi ʻana o ka plastik ma mua o ka hoʻoheheʻe elastic) me ka haki ʻole.
Ka pale ʻana i ka luhi: Mālama ʻo PP i kona ʻano ma hope o ka wili a me ke kulou ʻana.He waiwai nui kēia hiʻohiʻona no ka hana ʻana i nā hinges ola.
Insulation: He kiʻekiʻe ke kūpaʻa ʻana o ka mea PP a he mea insulating.
Ka hoʻouna ʻana: Hiki ke hana ʻia i loko o kahi kala ʻālohilohi, akā hana maʻamau ia i kahi kala opaque maoli me kahi kala kala.Inā makemake ʻia ka transmittance kiʻekiʻe, pono ke koho ʻia ka acrylic a i ʻole PC.
ʻO ka PP he thermoplastic me kahi helu heheʻe ma kahi o 130 degere Celsius, a lilo i wai ma hope o ka hiki ʻana i ka helu heheʻe.E like me nā thermoplastics ʻē aʻe, hiki ke hoʻomaʻamaʻa ʻia ka PP me ka ʻole o ka hoʻohaʻahaʻa nui ʻana.No laila, hiki ke hana hou ʻia ka PP a hoʻihoʻi maʻalahi.
ʻElua ʻano nui: homopolymers a me copolymers.Hoʻokaʻawale hou ʻia nā copolymers i nā copolymers poloka a me nā copolymers random.Loaʻa i kēlā me kēia māhele nā noi kūikawā.Ua kapa pinepineʻiaʻo PP ma keʻano he "mea kila" o kaʻoihana plastics, no ka mea, hiki ke hanaʻia ma ka hoʻohuiʻana i nā mea hoʻohui i ka PP, aiʻole i hanaʻia ma kahiʻano kūikawā, i hiki ai ke hoʻololi a hoʻololiʻia ka PP e hoʻokō i nā koi noi kūikawā.
ʻO ka PP no ka hoʻohana ʻana i ka ʻoihana maʻamau he homopolymer.Hoʻohui ʻia ka block copolymer PP me ka ethylene e hoʻomaikaʻi i ka pale ʻana i ka hopena.Hoʻohana ʻia ka copolymer PP e hana i nā huahana ductile a ʻike
E like me nā plastics ʻē aʻe, hoʻomaka ia mai nā "fractions" (nā pūʻulu māmā) i hana ʻia e ka distillation o nā wahie hydrocarbon a hui pū me nā catalysts e hana i nā plastics ma o ka polymerization a i ʻole condensation reactions.
Paʻi 3D PP
ʻAʻole hiki ke hoʻohana ʻia ka PP no ka paʻi 3D ma ke ʻano filament.
ʻO ka hana PP CNC
Hoʻohana ʻia ʻo PP no ka hana ʻana o CNC ma ke ʻano pepa.Ke hana nei i nā prototypes o kahi liʻiliʻi o nā ʻāpana PP, hana maʻamau mākou i ka mīkini CNC ma luna o lākou.He haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa ʻo PP, ʻo ia ka mea maʻalahi ke hoʻololi ʻia e ka wela, no laila pono ia i kahi kiʻekiʻe o ke akamai e ʻoki pololei.
ʻO ka hoʻokomo PP
ʻOiai he mau waiwai semi-crystalline ka PP, maʻalahi ke hoʻohālikelike ʻia ma muli o kona haʻahaʻa hoʻoheheʻe haʻahaʻa a me ka wai maikaʻi loa.Hoʻomaikaʻi nui kēia hiʻohiʻona i ka wikiwiki o ka hoʻopiha ʻana o ka mea i ka mold.ʻO ka shrinkage rate o PP ma kahi o 1-2%, akā e ʻokoʻa ia ma muli o nā kumu he nui, me ka hoʻopaʻa ʻana i ke kaomi, ka manawa paʻa, ka hoʻoheheʻe ʻana i ka mahana, ka mānoanoa o ka pā, ka mahana wela, a me ke ʻano a me ka pakeneka o nā mea hoʻohui.
Ma kahi o nā noi plastik maʻamau, kūpono loa ʻo PP no ka hana ʻana i nā fiber.ʻO ia mau huahana nā kaula, nā kāpeti, nā upholstery, nā lole, etc.
He aha nā pōmaikaʻi o ka PP?
Loaʻa maʻalahi ka PP a maʻalahi.
Loaʻa i ka PP ka ikaika flexural kiʻekiʻe.
He ʻili maʻalahi ko PP.
ʻO ka PP he moisture-proof a he haʻahaʻa ka wai.
He kūpaʻa kemika maikaʻi ʻo PP i nā ʻakika a me nā alkali.
He maikaʻi ke kūpaʻa luhi o ka PP.
Loaʻa i ka PP ka ikaika hopena maikaʻi.
ʻO PP kahi mea hoʻokalakupua uila maikaʻi.
●He kiʻekiʻe ko PP o ka hoʻonui ʻana i ka wela, e kaupalena ana i kāna mau noi wela kiʻekiʻe.
● Hiki i ka PP ke hoʻohaʻahaʻa ʻia e nā kukuna ultraviolet.
● ʻAʻole maikaʻi ka PP i nā mea hoʻoheheʻe chlorinated a me nā hydrocarbons aromatic.
● He paʻakikī ka pā ʻana o PP ma ka ʻili no ka maikaʻi ʻole o ka hoʻopili ʻana.
● ʻAʻole hiki ke hoʻopau ʻia ʻo PP.
● He maʻalahi ka PP i ka oxidize.
Ka manawa hoʻouna: Iulai-27-2023