1. Helu mānoanoa
Hōʻike ka helu viscosity i ke kaumaha molekala awelika o ka resin a ʻo ia ke ʻano nui no ka hoʻoholo ʻana i ke ʻano o ka resin. ʻOkoʻa nā waiwai a me nā hoʻohana o ka resin ma muli o ka viscosity. I ka piʻi ʻana o ke kekelē o ka polymerization o ka resin PVC, piʻi aʻe nā waiwai mechanical e like me ka ikaika tensile, ka ikaika hopena, ka ikaika haki, a me ka elongation i ka haki ʻana, ʻoiai e emi ana ka ikaika hua. Hōʻike nā hopena noiʻi i ka piʻi ʻana o ke kekelē o ka polymerization o nā mea kōkua hana PVC, hoʻomaikaʻi nā waiwai kumu o ka resin, ʻoiai e hōʻino ana ka hana hana a me ke ʻano rheological. Hiki ke ʻike ʻia he pilina pili loa ka hoʻolaha kaumaha molekala o ka resin PVC me ka hana plastik a me ka hana huahana.
2. Ka helu ʻāpana haumia (nā kiko ʻeleʻele a me ka melemele)
ʻO nā ʻāpana haumia kekahi o nā hōʻailona koʻikoʻi no ka loiloi ʻana i ka resin PVC. ʻO nā mea nui e hoʻopilikia nei i kēia hōʻailona: ʻo ka mea mua, ʻaʻole i holoi pono ʻia nā mea i koe ma ka paia uhi o ka ipu hao polymerization a ua haumia ka mea maka me nā haumia; ʻo ka lua, ka ʻaʻahu mechanical i hui pū ʻia me nā haumia a me ka hana kūpono ʻole e lawe mai ana i nā haumia; I ke kaʻina hana o ka hana plastic, inā he nui nā ʻāpana haumia, e loaʻa nā hopena maikaʻi ʻole i ka hana a me ka hoʻohana ʻana i nā huahana PVC i hana ʻia. No ka laʻana, i ka hana ʻana a me ke ʻano o nā profiles, he nui nā haumia a me nā ʻāpana, hiki ke hana i nā kiko e ʻike ʻia ma ka ʻili o ka profile, a laila e hōʻemi ana i ka hopena o ka huahana. Eia kekahi, ma muli o ka plasticization ʻole o nā ʻāpana haumia a i ʻole ka ikaika haʻahaʻa ʻoiai ka plasticization, ua emi nā waiwai mechanical o ka huahana.
3. Nā mea hoʻoheheʻe (me ka wai)
Hōʻike kēia hōʻailona i ka pohō kaumaha o ka resin ma hope o ka hoʻomehana ʻia ʻana i kahi mahana. ʻO ka haʻahaʻa o nā mea volatile hiki ke hoʻoulu maʻalahi i ka uila static, ʻaʻole kūpono i nā hana hānai i ka wā o ka hana ʻana a me ka hoʻoheheʻe ʻana; Inā kiʻekiʻe loa ka ʻike volatile, ua maʻalahi ka resin i ka clumping a me ka wai maikaʻi ʻole, a maʻalahi ka hana ʻana i nā pehu i ka wā o ka hoʻoheheʻe ʻana a me ka hana ʻana, kahi hopena maikaʻi ʻole i ka maikaʻi o ka huahana.
4. Ka nui o ka ʻike ʻia
ʻO ke ʻano paʻa o ka pauka resin PVC i hoʻopaʻa ʻole ʻia. Pili ia i ke ʻano o ka ʻāpana, ka nui awelika o ka ʻāpana, a me ka hoʻolaha ʻana o ka nui o ka ʻāpana o ka resin. ʻO ka haʻahaʻa o ka paʻa, ka nui nui, ka wikiwiki o ka omo ʻana o nā plasticizers, a me ka maʻalahi o ka hana ʻana. I ka ʻaoʻao ʻē aʻe, ʻo ke kiʻekiʻe o ka nui awelika o ka ʻāpana a me ka liʻiliʻi o ka nui e alakaʻi ai i ka omo ʻana o nā mea kōkua hana PVC. No ka hana ʻana i nā huahana paʻakikī, ʻaʻole kiʻekiʻe ke koi kaumaha molekala, a ʻaʻole hoʻohui ʻia nā plasticizers i ka wā o ka hana ʻana. No laila, pono e haʻahaʻa ka porosity o nā ʻāpana resin, akā aia kahi koi no ke kahe maloʻo o ka resin, no laila ʻoi aku ka kiʻekiʻe o ka paʻa o ka resin.
5. Ka hoʻopili ʻana o ka resin i ka plasticizer
Hōʻike ka nui o ka omo ʻana o nā mea kōkua hana PVC i ke kiʻekiʻe o nā pores i loko o nā ʻāpana resin, me ka nui o ka omo ʻana o ka aila a me ka porosity nui. Hoʻopili koke ka resin i nā plasticizers a he hana hana maikaʻi kona. No ka hoʻoheheʻe ʻana i ka extrusion (e like me nā profiles), ʻoiai ʻaʻole kiʻekiʻe loa ke koi no ka porosity resin, loaʻa i nā pores i loko o nā ʻāpana kahi hopena adsorption maikaʻi i ka hoʻohui ʻana o nā mea hoʻohui i ka wā o ka hana ʻana, e paipai ana i ka pono o nā mea hoʻohui.
6. Keʻokeʻo
Hōʻike ke keʻokeʻo i ke ʻano a me ke kala o ka resin, a me ka hōʻino ʻia i hana ʻia e ka paʻa wela maikaʻi ʻole a i ʻole ka manawa paʻa lōʻihi, e hopena ana i ka emi nui ʻana o ke keʻokeʻo. He hopena koʻikoʻi ka pae o ke keʻokeʻo i ke kūpaʻa ʻana o nā lāʻau a me nā huahana i ka wā ʻelemakule.
7. ʻO ka nui o ke koena o ka vinyl chloride
ʻO ke koena VCM e pili ana i ka ʻāpana o ka resin i hoʻopili ʻole ʻia a hoʻoheheʻe ʻia paha i loko o ka polyethylene monomer, a ʻokoʻa kona hiki ke adsorption ma muli o ke ʻano o ka resin. I loko o nā kumu koena VCM maoli, ʻo nā kumu nui e komo pū ana me ka mahana haʻahaʻa o ka hale kiaʻi wehe, ka ʻokoʻa nui o ke kaomi i loko o ka hale kiaʻi, a me ke ʻano maikaʻi ʻole o nā ʻāpana resin, hiki i nā mea āpau ke hoʻopilikia i ka desorption koena VCM, he hōʻailona ia no ke ana ʻana i ka pae maʻemaʻe o nā resins. No nā huahana kūikawā, e like me nā ʻeke ʻili pepa tin tin no nā lāʻau lapaʻau, ʻaʻole i kūlike ka nui o ke koena VCM o ka resin me ke kūlana maʻamau (emi ma mua o 5PPM).
8. Paʻa wela
Inā kiʻekiʻe loa ka nui o ka wai i loko o ka monomer, e hana ia i ka acidity, e hōʻino i nā lako, e hana i kahi ʻōnaehana polymerization hao, a ma ka hopena e hoʻopilikia i ke kūpaʻa wela o ka huahana. Inā loaʻa ka hydrogen chloride a i ʻole ka chlorine manuahi i loko o ka monomer, e loaʻa nā hopena maikaʻi ʻole i ka hopena polymerization. He maʻalahi ka hana ʻana o ka hydrogen chloride i loko o ka wai, kahi e hōʻemi ai i ka waiwai pH o ka ʻōnaehana polymerization a hoʻopilikia i ke kūpaʻa o ka ʻōnaehana polymerization. Eia kekahi, ʻo ke kiʻekiʻe o ka acetylene i loko o ka monomer o ka huahana e hoʻopilikia i ke kūpaʻa wela o PVC ma lalo o ka hopena synergistic o ka acetaldehyde a me ka hao, kahi e hoʻopilikia ai i ka hana hana o ka huahana.
9. Koena kānana
Hōʻike ke koena kānana i ke ʻano o ka nui like ʻole o nā ʻāpana o ka resin, a ʻo kāna mau mea nui e hoʻohuli ai, ʻo ia ka nui o ka mea hoʻolaha i loko o ke ʻano polymerization a me ka hopena hoʻoulu. Inā ʻoi aku ka ʻāwili a lahilahi paha o nā ʻāpana resin, e hoʻopilikia ia i ke ʻano o ka resin a he hopena pū kekahi i ka hana ʻana o ka huahana ma hope.
10. “Maka Iʻa”
ʻO "Fish eye", i ʻike ʻia hoʻi he crystal point, e pili ana i nā ʻāpana resin moakaka i hoʻopili ʻole ʻia ma lalo o nā kūlana hana thermoplastic maʻamau. Ka hopena i ka hana maoli. ʻO ke kumu nui o ka "fish eye" ʻo ia ka wā e kiʻekiʻe ai ka nui o nā mea e paila ana i loko o ka monomer, hoʻoheheʻe ia i ka polymer i loko o nā ʻāpana i ka wā o ke kaʻina hana polymerization, hoʻemi i ka porosity, hoʻopaʻakikī i nā ʻāpana, a lilo i "fish eye" manawa pōkole i ka wā o ke kaʻina hana plasticization. Hoʻolaha like ʻole ʻia ka mea hoʻomaka i loko o nā kulu aila monomer. I loko o kahi ʻōnaehana polymerization me ka hoʻoili wela like ʻole, ʻo ka hoʻokumu ʻia ʻana o ka resin me ke kaumaha molekala like ʻole, a i ʻole ka haumia o ka reactor i ka wā e hānai ana, ka resin koena, a i ʻole ka hoʻopili nui ʻana o ka mea reactor hiki ke hana i ka "fisheye". ʻO ka hoʻokumu ʻia ʻana o "fish eyes" e pili pololei i ka maikaʻi o nā huahana PVC, a i ka hana ʻana ma hope, e pili ia i ka aesthetics o ka ʻili o nā huahana. E hōʻemi nui hoʻi ia i nā waiwai mechanical e like me ka ikaika tensile a me ka elongation o nā huahana, hiki ke alakaʻi maʻalahi i ka perforation o nā kiʻiʻoniʻoni plastik a i ʻole nā pepa, ʻoi aku hoʻi nā huahana uwea, e hoʻopilikia i ko lākou mau waiwai insulation uila. ʻO ia kekahi o nā mea nui o ka hana ʻana o ka resin a me ka hana ʻana o ka plasticization.
Ka manawa hoʻouna: Iune-12-2024
