ʻO ka hoʻokaʻawale ʻana o PP a me nā waiwai nā pono a me nā hemahema:
Hoʻokaʻawale ʻia ka Polypropylene (PP) i homo-polymer polypropylene (PP-H), block (impact) co-polymer polypropylene (PP-B) a me random (random) co-polymer polypropylene (PP-R).He aha nā pōmaikaʻi, nā hemahema a me nā hoʻohana ʻana o PP?Kaʻana like me ʻoe i kēia lā.
1. Homo-polymer polypropylene (PP-H)
He polymerized mai ka propylene monomer hoʻokahi, a ʻaʻole i loko o ke kaulahao mole ethylene monomer, no laila ke kiʻekiʻe loa ka maʻamau o ke kaulahao mole, no laila ke kiʻekiʻe o ka crystallinity a me ka hana maikaʻi ʻole.I mea e hoʻomaikaʻi ai i ka palupalu o PP-H, hoʻohana kekahi mau mea hoʻolako maka i ke ʻano o ka hui ʻana i ka polyethylene a me ka ethylene-propylene rubber e hoʻomaikaʻi ai i ka paʻakikī o ka mea, akā ʻaʻole hiki ke hoʻoponopono i ka paʻa wela o ka PP. -H.hoʻokō
Pōmaikaʻi: ikaika maikaʻi
Nā pōʻino: maikaʻi ʻole ka hopena o ka hopena (ʻoi aku ka brittle), ʻilihune paʻakikī, maikaʻi ʻole ke ʻano paʻa, maʻalahi ka ʻelemakule, maikaʻi ʻole ke kūpaʻa wela lōʻihi.
Noi: Extrusion blow grade, papa wili palahalaha, papa hoolei injection, papa fiber, papa kiʻi puhi.Hiki ke hoʻohana ʻia no ke kāʻei ʻana, ka puhi ʻana i nā hue, nā pulupulu, nā kaula, nā ʻeke i ulana ʻia, nā mea pāʻani, nā waihona, nā mea uila, nā mea hale, nā pahu ʻaina microwave, nā pahu mālama, nā kiʻi ʻoniʻoni pepa.
Ke ʻano hoʻokae: ke ʻā ʻia ke ahi, palahalaha ka uwea, ʻaʻole lōʻihi.
2. ʻAʻohe (ʻokoʻa) copolymerized polypropylene (PP-R)
Loaʻa iā ia e ka co-polymerization o propylene monomer a me kahi liʻiliʻi o ka ethylene (1-4%) monomer ma lalo o ka hana o ka wela, ke kaomi a me ka catalyst.Hoʻokaʻawale ʻia ka monomer ethylene i loko o ke kaulahao lōʻihi o propylene.ʻO ka hoʻohui maʻamau o ka ethylene e hōʻemi ana i ka crystallinity a me ka helu heheʻe o ka polymer, a hoʻomaikaʻi i ka hana o ka mea ma ke ʻano o ka hopena, ka lōʻihi o ka hydrostatic pressure resistance, ka wā lōʻihi o ka wela o ka oxygen, a me ka hoʻoili ʻana a me ka hoʻoheheʻe ʻana.PP-R molecular chain structure, ethylene monomer content a me nā hōʻailona ʻē aʻe he hopena pololei i ka paʻa wela o ka wā lōʻihi, nā waiwai mechanical a me nā waiwai hoʻoili o ka mea.ʻOi aku ka nui o ka puʻunaue ʻana o ka ethylene monomer i loko o ke kaulahao molekole propylene, ʻoi aku ka nui o ka hoʻololi ʻana o nā waiwai polypropylene.
Pōmaikaʻi: maikaʻi ka hana piha, ikaika kiʻekiʻe, rigidity kiʻekiʻe, kūpaʻa wela maikaʻi, kūlana kūpaʻa maikaʻi, haʻahaʻa haʻahaʻa haʻahaʻa paʻakikī (maikaʻi maikaʻi), ʻike maikaʻi, ʻālohilohi maikaʻi.
Nā hemahema: ka hana maikaʻi loa ma PP
Noi: Extrusion blow grade, film grade, injection molding grade.ʻO nā paipu, nā kiʻi ʻoniʻoni, nā ʻōmole hoʻoheheʻe, nā ipu akaka loa, nā huahana hale akaka, nā syringes hoʻolele, nā kiʻi ʻoniʻoni pepa.
ʻO ke ala ʻike: ʻaʻole ia e ʻeleʻele ma hope o ka ʻā ʻana, a hiki ke huki i kahi uea lōʻihi lōʻihi
3. Paʻa (impact) co-polymer polypropylene (PP-B)
He kiʻekiʻe loa ka maʻiʻo ethylene, ma ke ʻano he 7-15%, akā no ka mea kiʻekiʻe loa ka likelika o ka hoʻohui ʻana i ʻelua monomer ethylene a me ʻekolu monomer ma PP-B, e hōʻike ana ʻo ia no ka mea aia ka monomer ethylene i loko o ka māhele poloka, ʻo ka The regularity. o PP-H ua hoemi ia, no laila, aole hiki ke hoʻokō i ke kumu o ka hoʻomaikaʻi ʻana i ka hana o ka PP-H ma ke ʻano o ka helu heheʻe, ka lōʻihi o ka hydrostatic pressure resistance, ka lōʻihi o ka wela o ka oxygen a me ka hana paipu a me ka hana ʻana.
Pōmaikaʻi: ʻoi aku ka maikaʻi o ka hopena, ʻoi aku ka maikaʻi o ka rigidity
Nā pōʻino: haʻahaʻa haʻahaʻa, haʻahaʻa haʻahaʻa
Hoʻohana: Extrusion grade, injection molding grade.ʻO nā pahu, nā huahana pā lahilahi, nā strollers, nā mea haʻuki, nā ukana, nā bākeke pena, nā pahu pākaukau, nā huahana pā lahilahi.
ʻO ke ala ʻike: ʻaʻole ia e ʻeleʻele ma hope o ka ʻā ʻana, a hiki ke huki i kahi uea lōʻihi lōʻihi
Nā helu maʻamau: anti-hygroscopicity, acid and alkali corrosion resistance, solubility resistance, poor oxidation resistance i ka wela kiʻekiʻe
Aia ka MFR kahe o PP ma ka laulā o 1-40.ʻO nā mea PP me ka MFR haʻahaʻa i ʻoi aku ka maikaʻi o ka pale ʻana akā haʻahaʻa ka ductility.No ka mea MFR like, ʻoi aku ka ikaika o ke ʻano co-polymer ma mua o ka ʻano homo-polymer.Ma muli o ka crystallization, kiʻekiʻe loa ka emi ʻana o ka PP, ma ke ʻano he 1.8-2.5%.
