Hoʻokaʻawale ʻana o ka Polyethylene
Ka hoʻokaʻawale ʻana o ka polyethylene
Hoʻokaʻawale ʻia ka polyethylene i ka polyethylene kiʻekiʻe (HDPE), polyethylene haʻahaʻa haʻahaʻa (LDPE) a me ka polyethylene haʻahaʻa haʻahaʻa linear (LLDPE) e like me ke ʻano polymerization, ke kaumaha molekala a me ke kaulahao.
LDPE
Nā waiwai: ʻono ʻole, ʻala ʻole, ʻaʻohe mea ʻawaʻawa, ʻili ʻeleʻele, nā ʻāpana waxy keʻokeʻo keʻokeʻo, ʻano nui ma kahi o 0.920 g/cm3, wahi hoʻoheheʻe 130 ℃ ~ 145 ℃. ʻAʻole hiki ke hoʻoheheʻe ʻia i ka wai, hiki ke hoʻoheheʻe ʻia i loko o ka hydrocarbons, etc. Hiki iā ia ke pale i ka ʻino ʻana o ka hapa nui o nā waikawa a me nā alkalis, haʻahaʻa haʻahaʻa ka wai, hiki ke hoʻomau i ka maʻalahi i nā wela haʻahaʻa, a he kiʻekiʻe ka uila uila.
Ka Hana Hana Hana:
ʻElua mau ʻano o ke ʻano paipu kiʻekiʻe a me ke ʻano ipu. I mea e hōʻemi ai i ka wela o ka hopena a me ke kaomi, hoʻohana maʻamau ke kaʻina hana tubular i kahi mea hoʻomaka haʻahaʻa haʻahaʻa haʻahaʻa e hoʻomaka i ka ʻōnaehana polymerization, hoʻohana ʻia ka ethylene maʻemaʻe kiʻekiʻe e like me ka mea nui, propylene, propane, etc. nā mea hoʻoponopono paʻakikī. Ua lawe ʻia ka polymerization ma lalo o nā kūlana o 330 ° C a me 150-300MPa. ʻO ka polymer i hoʻoheheʻe ʻia e hoʻomaka i ka polymerization i loko o ka reactor pono e hoʻomaʻalili a hoʻokaʻawale ʻia ma ke kaomi kiʻekiʻe, ke kaomi waena a me ke kaomi haʻahaʻa. Ma hope o ka hoʻokaʻawale ʻana, hoʻouna ʻia i ka inlet o ka compressor kiʻekiʻe (30 MPa), ʻoiai ʻo ke kinoea holo haʻahaʻa haʻahaʻa e hoʻomaha ʻia a hoʻokaʻawale ʻia a hoʻouna ʻia i ka compressor haʻahaʻa (0.5 MPa) no ka hana hou ʻana, ʻoiai ka polyethylene i hoʻoheheʻe ʻia. hoʻounaʻia i ka granulator ma hope o ka hoʻokaʻawaleʻana i ke kiʻekiʻe a me ka haʻahaʻa. No ka granulation i ka wai, i ka wā granulation, hiki i nā ʻoihana ke hoʻohui i nā mea hoʻohui kūpono e like me nā kahua noi like ʻole, a hoʻopili ʻia nā granule a hoʻouna ʻia.
hana:
Hiki ke hoʻohana ʻia nā ʻano hana e like me ka injection molding, extrusion molding, a me ka blow molding. Hoʻohana nui ʻia e like me ke kiʻi ʻoniʻoni mahiʻai, nā kiʻi ʻoniʻoni ʻenehana, nā lāʻau lapaʻau a me nā kiʻi paʻi meaʻai, nā ʻāpana mechanical, nā mea e pono ai i kēlā me kēia lā, nā mea kūkulu hale, uea, insulation cable, uhi a me ka pepa synthetic.
LLDPE
Nā Waiwai: No ka mea, ʻokoʻa nā ʻano molekala o LLDPE a me LDPE, ʻokoʻa nā waiwai. Ke hoʻohālikelike ʻia me LDPE, ʻoi aku ka maikaʻi o ka LLDPE i ke kūʻē ʻana i ke kaiapuni a me ka insulation uila, ʻoi aku ka kiʻekiʻe o ka wela, ka hopena a me ka pale ʻana i ka puncture.
Ka Hana Hana Hana:
Hana nui ʻia ka resin LLDPE e nā lako polyethylene piha piha, a ʻo nā kaʻina hana ʻelele he kaʻina Innovene a me ke kaʻina Unipol a UCC.
hana:
Ma o ka injection molding, extrusion, blow molding a me nā ʻano hana hoʻoheheʻe ʻē aʻe, ka hana ʻana i nā kiʻiʻoniʻoni, nā mea e pono ai i kēlā me kēia lā, nā paipu, nā uea a me nā kaula, etc.
HDPE
Nā waiwai: Nā ʻāpana kūlohelohe, cylindrical a i ʻole oblate, nā ʻāpana maʻemaʻe, ʻo ka nui o nā ʻāpana he 2 mm ~ 5 mm i kēlā me kēia ʻaoʻao, ʻaʻohe mea haumia mechanical, mea ʻeleʻele. ʻO ka pauka he pauka keʻokeʻo, a ʻae ʻia ka huahana kūpono e loaʻa i kahi melemele liʻiliʻi kala like 'ole. ʻAʻole hiki ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe maʻamau i ka lumi wela, akā hiki ke pehu i loko o ka aliphatic hydrocarbons, aromatic hydrocarbons a me ka halogenated hydrocarbons ke hoʻopili ʻia no ka manawa lōʻihi, a hiki ke hoʻoheheʻe iki ʻia i loko o toluene a me ka acetic acid ma nā mahana ma luna o 70 °C. Hana ʻia ka oxidation ke hoʻomehana ʻia i ka ea a ma lalo o ka mana o ka lā. Kūleʻa i ka nui o ka ʻakika a me ka erosion alkali. He haʻahaʻa ka haʻahaʻa wai, hiki ke hoʻomau i ka maʻalahi i ka haʻahaʻa haʻahaʻa, a he kiʻekiʻe ka insulation uila.
Ka Hana Hana Hana:
Hoʻohana ʻia nā kaʻina hana ʻelua: ke ʻano hana gas a me ke ʻano slurry.
hana:
Ke hoʻohana nei i ka injection molding, blow molding, extrusion molding, rotomolding a me nā ʻano hana ʻē aʻe e hana ai i nā huahana kiʻiʻoniʻoni, nā mea e pono ai i kēlā me kēia lā a me ka hoʻohana ʻana i nā ʻoihana o nā ʻano nui o nā pahu pahu, nā paipu, nā lipine calendering a me nā kaula hoʻopaʻa no ka hoʻopili ʻana, nā kaula, nā ʻupena lawaiʻa a me nā fibers braided, Uea a me ke kaula etc.
Hoʻokaʻawale ʻana o ka Polyethylene