PP polypropylene
Laulā noi maʻamau:
ʻO ka ʻoihana kaʻa (ka hoʻohana nui ʻana i ka PP i loaʻa i nā mea hoʻohui metala: nā pale lepo, nā ʻauwaʻa ventilation, nā mea pā, a me nā mea ʻē aʻe), nā mea hana (nā mea holoi puka kīʻaha, nā ʻauwaʻa hoʻomaloʻo maloʻo, nā papa mīkini holoi a me nā uhi, nā liner puka pahu friji, etc.), Iapana E hoʻohana i nā mea kūʻai aku ( nā lako mauʻu a me nā kīhāpai e like me
ʻO nā mower lawn a me nā sprinklers, etc.).
Nā kūlana kaʻina hana injection mold:
Lapaʻau hoʻomaloʻo: Inā mālama pono ʻia, ʻaʻohe pono e hoʻomaloʻo.
He wela wela: 220 ~ 275 ℃, e makaʻala ʻaʻole e oi aku i ka 275 ℃.
ʻO ka mahana wela: 40 ~ 80 ℃, 50 ℃ ua ʻōlelo ʻia.Hoʻoholo nui ʻia ka degere o ka crystallization e ka mahana mold.
ʻO ke kaomi injection: a hiki i 1800bar.
ʻO ka wikiwiki injection: ʻO ka mea maʻamau, hiki i ka hoʻohana ʻana i ka hoʻohana kiʻekiʻe kiʻekiʻe ke hoʻemi i ke kaomi kūloko i ka liʻiliʻi.Inā loaʻa nā hemahema ma ka ʻili o ka huahana, pono e hoʻohana ʻia ka inikini haʻahaʻa haʻahaʻa i kahi mahana kiʻekiʻe.
Nā mea holo a me nā ʻīpuka: No ka poʻe kukini anu, ʻo 4 ~ 7mm ke anawaena o ka mea holo maʻamau.Manaʻo ʻia e hoʻohana i kahi awa injection circular a me ka runner.Hiki ke hoʻohana ʻia nā ʻano ʻīpuka āpau.ʻO ke anawaena puka maʻamau mai 1 a 1.5mm, akā hiki ke hoʻohana ʻia nā puka liʻiliʻi e like me 0.7mm.No nā ʻīpuka lihi, ʻo ka hohonu o ka ʻīpuka liʻiliʻi he hapalua ka mānoanoa o ka pā;ʻo ka laula o ka ʻīpuka liʻiliʻi he ʻelua paha ka mānoanoa o ka pā.Hiki i nā mea PP ke hoʻohana i ka ʻōnaehana holo wela.
Nā waiwai kemika a me ke kino:
ʻO PP kahi mea semi-crystalline.ʻOi aku ka paʻakikī ma mua o ka PE a ʻoi aku ka nui o ka heheʻe.Ma muli o ka palupalu loa o ka homopolymer PP ke kiʻekiʻe ka mahana ma mua o 0°C, ʻo ka nui o nā mea pāʻoihana PP he copolymers maʻamau me 1 a 4% ethylene a i ʻole nā ​​copolymers clamp me nā mea ethylene kiʻekiʻe.ʻO ka mea Copolymer PP he haʻahaʻa haʻahaʻa haʻahaʻa wela (100 ° C), haʻahaʻa haʻahaʻa, haʻahaʻa haʻahaʻa, haʻahaʻa rigidity, akā ʻoi aku ka ikaika o ka hopena.Hoʻonui ka ikaika o ka PP me ka piʻi ʻana o ka ethylene content.ʻO ka mahana hoʻonāwaliwali o Vicat o PP he 150°C.Ma muli o ka crystallinity kiʻekiʻe, ʻoi aku ka maikaʻi o ka rigidity o ka ʻili a me ka pale ʻana o kēia mea.ʻAʻole loaʻa iā PP ka pilikia o ka haʻalulu koʻikoʻi o ke kaiapuni.ʻO ka maʻamau, hoʻololi ʻia ka PP ma o ka hoʻohui ʻana i ka fiber aniani, nā mea hoʻohui metala a i ʻole ka lāʻau thermoplastic.ʻO ka kahe kahe MFR o PP mai ka 1 a hiki i ka 40. ʻO nā mea PP me ka MFR haʻahaʻa i ʻoi aku ka maikaʻi o ka hopena ʻoi aku ka ikaika o ka elongation.No nā mea me ka MFR like, ʻoi aku ka ikaika o ke ʻano copolymer ma mua o ka ʻano homopolymer.Ma muli o ka crystallization, he kiʻekiʻe ka shrinkage rate o PP, maʻamau 1.8 ~ 2.5%.A ʻoi aku ka maikaʻi o ka hoʻohālikelike ʻana o ka shrinkage ma mua o ka PE-HD a me nā mea ʻē aʻe.ʻO ka hoʻohui ʻana i ka 30% o nā mea hoʻohui aniani hiki ke hōʻemi i ka shrinkage i 0.7%.Loaʻa i nā mea homopolymer a me ka copolymer PP ka maikaʻi o ka moisture absorption, acid and alkali corrosion resistance, a me ke kūpaʻa solubility.Eia nō naʻe, ʻaʻohe ona kūʻē i nā mea hoʻoheheʻe aromatic hydrocarbons (e like me benzene), chlorinated hydrocarbons (carbon tetrachloride) solvents, etc. ʻAʻole loaʻa ka PP i ka pale oxidation i nā wela kiʻekiʻe e like me PE.

ʻO kā mākounā puna ʻili, paipu hoao ilikai, nasal inhalersa me nā huahana ʻē aʻe e pili ana i ke kino kanaka e hoʻohana i nā mea PP.Loaʻa iā mākou nā mea lāʻau lapaʻau PP a me nā meaʻai meaʻai PP.No ka mea, ʻaʻohe mea make nā mea PP.