He aha ka polypropylene (PP) a he aha kona hoʻohana?
ʻO Polypropylene (PP) kahi polymela hoʻohui thermoplastic i hana ʻia mai kahi hui pū o nā propomene monomers. Loaʻa iā ia he laulā o nā noi, e like me ka hoʻopili huahana huahana, nā ʻāpana palaka no ka ʻoihana kaʻa, a me nā lole. ʻO nā ʻepekema ʻo Philip Oil Company ʻo Paul Hogan lāua ʻo Robert Banks i hana mua i polypropylene ma 1951, a ma hope ua hana ʻepekema ʻItalia a me Kelemania ʻo Natta lāua ʻo Rehn i polypropylene. Ua hoʻopau ʻo Natta a synthesize i ka huahana polypropylene mua ma Sepania i 1954, a ʻo kāna hiki i ka crystallization hiki ke hoʻāla i ka hoihoi nui. Ma 1957, ua piʻi ka laulaha o ka polypropylene, a ua hoʻomaka ka hana kalepa nui ma waena o ʻEulopa. I kēia lā, ua lilo ia i hoʻokahi o nā lula i hoʻohana pinepine ʻia ma ka honua.


ʻO kahi pahu lāʻau i hana ʻia me PP me ka uhi hinged

Wahi a nā hōʻike, ʻo ka noi ākea o ka honua i kēia manawa no nā mea PP ma kahi o 45 miliona mau tona i kēlā me kēia makahiki, a ua manaʻo ʻia e hoʻonui ʻia ka noi ma kahi o 62 miliona mau tona i ka hopena o 2020. ʻO ka noi nui o PP ka ʻoihana ʻūlapa, a nā helu ma kahi o 30% o ka nui o ka hoʻohana. ʻO ka lua ka hana uila a me nā pono hana, e hoʻopau ana ma kahi o 26%. Hoʻohana nā mīkini home a me nā ʻoihana kaʻa i 10%. Pau ka ʻenehana kūkulu i 5%.

He laumanu maʻalahi ʻo PP a hiki ke pani i kekahi huahana huahana ʻē aʻe, e like me nā pale a me nā pale lako i hana ʻia e POM. He mea paʻakikī hoʻi ka ʻili maʻalahi no PP e pili i nā ʻilikai ʻē aʻe, ʻo ia hoʻi, ʻaʻole hiki ke hoʻopaʻa paʻa ʻia ʻo PP me ka limu ʻoihana, a i kekahi manawa pono e hoʻopaʻa ʻia e ka hao. Hoʻohālikelike ʻia me nā plastics ʻē aʻe, he ʻano like hoʻi ko PP o ka haʻahaʻa haʻahaʻa, hiki ke hōʻemi i ke kaumaha no nā mea hoʻohana. He kūpaʻa maikaʻi ʻo PP i nā mea hoʻoheheʻeolaola e like me ka hamo i ka mahana o ka lumi. Akā maʻalahi ʻo PP i ka oxidize ma ke ana wela kiʻekiʻe.

ʻO kekahi o nā pono nui o PP ka hana maikaʻi maikaʻi ʻana, i hiki ke hana ʻia e ka hoʻoheheʻe ʻana a i ʻole ka hana ʻana me CNC. ʻO kahi laʻana, i loko o ka pahu lāʻau PP, pili ka uhi i ka kino ʻōmole 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 nei i ka uhi he pepa ea lahilahi loa ia i hiki ke kūlou pinepine (neʻe i kahi pae loa kokoke i 360 kekelē) me ka haki ʻole. ʻOiai ʻaʻole hiki i ka hinge ola o PP ke hāpai i ka ukana, kūpono loa ia i ka pāpale ʻōmole o nā pono o kēlā me kēia lā.

ʻO kekahi mea maikaʻi aʻe o ka PP hiki ke maʻalahi copolymerized me nā polymers ʻē aʻe (e like me PE) e hana i nā plastics hiwahiwa. Hoʻololi nui ka copolymer i nā waiwai o ka mea, a hiki ke hoʻokō i nā noi ʻenehana ikaika i hoʻohālikelike ʻia me PP maʻemaʻe.

ʻO kekahi noi ʻē aʻe i hiki i PP ke hana ma ke ʻano he palakiko a me kahi mea fiber.

ʻO nā hiʻohiʻona i luna aʻe nei i hiki i ka PP ke hoʻohana i nā noi he nui: nā pā, nā pā, nā kīʻaha, nā ʻeke, nā ipu ea opaque a me nā mea pāʻani.

He aha nā ʻano o PP?
ʻO nā hiʻohiʻona nui o PP penei:

ʻO ke kūmole kemikū: ʻaʻole hoʻoheheʻe ʻia ka alkali a me ka waikawa me PP, kahi e lilo ai i ipu kūpono no ia ʻano wai (e like me nā detergents, nā huahana kōkua mua, a pēlā aku.).
Elasticity a me ka paʻakikī: He elastis ka PP i loko o kekahi ʻano o ka deflection, a e hana i ka deformation plastic me ka ʻole o ka cracking i ka wā mua o ka deformation, no laila e ʻike ʻia ma ke ʻano he "paʻakikī". ʻO ka paʻakikī ka manawa ʻenekinia i wehewehe ʻia e like me ka hiki o kahi mea e deforma (deformation ea ma mua o ka deformation elastis) me ka haki ʻole.
Kūlana luhi: hoʻomau ʻo PP i kona ʻano ma hope o ka wili ʻana a me ke pio ʻana. He mea waiwai nui kēia hiʻohiʻona no ka hana ʻana i nā hinge ola.
'Īpale: ʻO nā mea PP kahi kūpaʻa kiʻekiʻe a he mea insulate.
Transmittance: Hiki iā ia ke hana i kahi kala aniani, akā hana ʻia ia i ke kala opaque kūlohelohe me kahi transmittance kala. Inā koi ʻia ka transmittance kiʻekiʻe, pono e koho ʻia ka acrylic a i ʻole PC.
ʻO PP kahi thermoplastic me kahi kiko hoʻoheheʻe ma kahi o 130 kekelē Celsius, a lilo i wai i ka wā e hiki ai i ka pae hoʻoheheʻe. E like me nā thermoplastics ʻē aʻe, hiki ke hoʻomehana a hoʻomaʻalili pinepine ʻia ʻo PP me ka ʻole o ka hoʻohaʻahaʻa nui. No laila, hiki ke hana hou ʻia iā PP a maʻalahi hoʻi e hoʻihoʻi ʻia.

He aha nā ʻano ʻokoʻa o PP?
Aia he ʻano nui ʻelua: nā homopolymers a me nā copolymers. Māhele hou ʻia nā Copolymers i mau copolymers a me nā copolymers. Loaʻa i kēlā me kēia mahele nā noi kū hoʻokahi. Kuhi pinepine ʻia ʻo PP ma ke ʻano he "kila" ʻoihana plastics, no ka mea hiki ke hana ʻia me ka hoʻohui ʻana i nā mea hoʻohui i PP, a i hana ʻia paha i kahi ala ʻokoʻa, i hiki ai iā PP ke hoʻololi a hoʻopilikino ʻia e hoʻokō i nā koi noi kū hoʻokahi.

ʻO PP no ka hoʻohana ʻoihana nui he homopolymer. Hoʻohui ʻia ʻo Block copolymer PP me ka ethylene e hoʻomaikaʻi ai i ka hopena hopena. Hoʻohana ʻia ka copolymer PP kaulike e hana i nā huahana ductile a me ka aniani moakaka.

Pehea e hana ai iā PP?
E like me nā lula ʻē aʻe, hoʻomaka ia mai nā "hakina" (nā hui māmā) i hoʻokumu ʻia e ka distillation o nā wahie hydrocarbon a hui pū ʻia me nā catalst ʻē aʻe e hana i nā plastics ma o ka polymerization a i ʻole nā hopena polycondensation.

ʻO nā hiʻohiʻona CNC, 3D a me nā hoʻoheheʻe ʻana
Pai paʻi PP 3D

ʻAʻole hiki ke hoʻohana i ka PP no ka paʻi 3D ʻana i ka palapala filament.

Ke hana nei ʻo PP CNC

Hoʻohana ʻia ʻo PP no ka hana ʻana o CNC i ka palapala. Ke hana nei i nā prototypes o kahi liʻiliʻi o nā ʻāpana PP, hana maʻamau mākou iā CNC machining ma luna o lākou. He haʻahaʻa annealing anuanu ʻo PP, ʻo ia hoʻi he deformed maʻalahi e ka wela, no laila pono i kahi kiʻekiʻe o ke akamai e ʻoki pololei.

PP hoʻoheheʻe

ʻOiai ʻo PP he waiwai semi-crystalline, maikaʻi maikaʻi loa ia ma muli o ka viscosity hoʻoheheʻe haʻahaʻa, no laila maʻalahi ke ʻano. Hoʻonui maikaʻi kēia hiʻohiʻona i ka wikiwiki i hoʻopihapiha nā mea i ka punahelu. ʻO ka helu shrinkage o PP ma kahi o 1-2%, akā e loli ia ma muli o nā kumu he nui, e like me ka hoʻopaʻa ʻana i ka kaomi, ka hoʻopaʻa ʻana i ka manawa, ka mahana hoʻoheheʻe, ka mānoanoa o ka paia puna, ka mahana wela, a me ke ʻano a me ka pākēneka o nā mea hoʻohui.

Nā hoʻohana ʻē aʻe
Ma waho aʻe o nā noi lula maʻamau, kūpono loa ʻo PP no ka hana ʻana i nā olonā. ʻO ia mau huahana e pili ana i nā kaula, nā kapeta, nā pale, nā lole, a pēlā aku.


He aha nā mea maikaʻi o ka PP?
Loaʻa a maʻalahi a maʻalahi ʻo PP.
He ikaika flexural kiʻekiʻe ko PP.
He pae maʻalahi ʻo PP.
ʻO PP ka hōʻoia-wai a haʻahaʻa ka wai i ka lawe.
He kūpaʻa kemika maikaʻi ko PP i nā waikawa like ʻole a me nā alkalis.
He kūluhi luhi maikaʻi ʻo PP.
He ikaika maikaʻi ko PP.
He insulator uila maikaʻi ʻo PP.
He aha nā mea maikaʻi ʻole o PP?
ʻO PP kahi kōpili kiʻekiʻe o ka hoʻonui ʻana o ka mehana, kahi e kaupalena ai i kāna noi wela kiʻekiʻe.
Hiki i ka PP ke hoʻohaʻahaʻa e nā kukuna ultraviolet.
He maikaʻi ʻole ke kūpaʻa ʻana o PP i nā mea hoʻoheheʻe ʻia me ka chlorlor a me nā hydrocarbons onaona.
He paʻakikī ʻo PP e pīpī ma ka ʻili no ka maikaʻi ʻole o ka hoʻopili ʻana.
PP lapalapa loa.
Maʻalahi ʻo PP e hoʻoheheʻe i ka wai.
ʻOiai nā hemahema, he mea maikaʻi ka PP. Loaʻa iā ia kahi ʻano hoʻohuihui ʻokoʻa i hiki ʻole ke hoʻohālikelike i nā meahana ʻē aʻe, ʻo ia, hiki ke copolymerized me nā polymers ʻē aʻe e hana i nā mea hui, a hiki ke hoʻohui ʻia nā mea hoʻohui like ʻole, kahi koho kūpono loa no nā papahana he nui.

He aha nā ʻano PP?
Ma lalo o nā kūlana maʻamau, ʻo ia hoʻi, kahi mahana wela o 25 ° C a me 1 lewa o ke kaomi.

Inoa ʻenehana: Polypropylene (PP)

Hoʻohui kemika: (C3H6) n


Kuhi hōʻoia resin (no ka hana hou ʻana):


Ka mahana hoʻoheheʻe: 130 ° C

Ka mahana aniani maʻamau: 32-66 ° C

ʻO ka mahana wela wela: 100 ° C (ma lalo o 0.46 MPa kaomi)

Ka ikaika ikaika: 32 MPa

Ka ikaika o Flexural: 41 MPa

Umekaumaha: 0.91

Ka helu Shrinkage: 1.5-2.0%