palapala noi

ʻO ka WPC kahi mea i hoʻohui ʻia e ka hoʻohana ʻana i nā plastic melt wela, me ka polyethylene, polypropylene, polyvinyl chloride a me kā lākou copolymers e like me nā adhesives, me ka hoʻohana ʻana i ka pauka lāʻau e like me ka lāʻau, ka mauʻu mea kanu mahiʻai, ka pauka pūpū mea kanu e like me ka hoʻopiha ʻana i nā mea, extrusion molding a i ʻole ke ʻano kaomi. ʻano hoʻoheheʻe ʻia.Hiki ke hoʻohana ʻia nā mea ʻenehana hoʻoheheʻe wela i ka ʻoihana a i ʻole nā ​​​​mea hoʻopau ola, hiki ke hoʻohana ʻia ka pauka lāʻau i ka ʻōpala lāʻau, ka lāʻau liʻiliʻi a me nā lāʻau haʻahaʻa haʻahaʻa.Mai ka hiʻohiʻona o ka hana ʻana i nā mea maka, nā huahana plastik lāʻau e lohi a hoʻopau i ka haumia o ka ʻōpala palaka, a hoʻopau hoʻi i ka pollution i hoʻokumu ʻia e ka mea kanu mea kanu i ke kaiapuni.ʻO ke koho ʻana i ke ʻano mea i loko o ke kaʻina hana hoʻohui e pili ana i kēia mau ʻano:

1. Polymers

ʻO nā plastics i hoʻohana ʻia i ka hana ʻana i nā composites lāʻau-plastic composites hiki ke lilo i nā plastic thermoset a me nā thermoplastics, nā plastik thermoset e like me ka epoxy resins, thermoplastics e like me polyethylene (PE), polypropylene (PP) a me polyoxyethylene (PVC).Ma muli o ka maikaʻi ʻole o ka wela o ka lāʻau, ʻo nā thermoplastics wale nō me ka hoʻoponopono ʻana i nā mahana ma lalo o 200 ° C i hoʻohana nui ʻia, ʻoi aku ka polyethylene.ʻO ke koho ʻana i nā polymers plastic e pili ana i nā ʻano kūlohelohe o ka polymer, nā pono o ka huahana, ka loaʻa ʻana o nā mea waiwai, ke kumukūʻai a me ke ʻano o ka kamaʻāina me ia.E like me: hoʻohana nui ʻia ka polypropylene i nā huahana automotive a me nā huahana ola i kēlā me kēia lā, hoʻohana nui ʻia ʻo PVC i ke kūkulu ʻana i nā puka a me Windows, paving panels a pēlā aku.Eia kekahi, ʻoi aku ka hopena o ka melt flow rate (MFI) o ka plastic i nā waiwai o ka mea i hoʻohui ʻia, ma lalo o nā kūlana hana like, ʻoi aku ka kiʻekiʻe o ka MFI o ka resin, ʻoi aku ka maikaʻi o ka infiltration o ka pauka lāʻau. ʻoi aku ka like o ka hāʻawi ʻana i ka pauka lāʻau, a ʻo ka infiltration a me ka hāʻawi ʻana i ka pauka lāʻau e pili ana i nā ʻano mechanical o ka mea hoʻohui, ʻoi aku ka ikaika o ka hopena.

2. Nā mea hoʻohui

No ka mea he ikaika ka wai o ka pauka lāʻau a me ka polarity ikaika, a ʻo ka hapa nui o nā thermoplastics he non-polar a me ka hydrophobic, ʻilihune ka hoʻohālikelike ʻana ma waena o nā mea ʻelua, a liʻiliʻi loa ka ikaika hoʻopili pili, a hoʻohana pinepine ʻia nā mea hoʻohui kūpono e hoʻololi i ka ʻili o ka polymer. a me ka pauka lāʻau e hoʻomaikaʻi i ka pilina pili ma waena o ka pauka lāʻau a me ka resin.Eia kekahi, ʻoi aku ka maikaʻi o ka hoʻopuehu ʻana o ka pauka lāʻau hoʻopiha piha i nā thermoplastics i hoʻoheheʻe ʻia, pinepine i ke ʻano o ka hoʻohui ʻana, e hoʻoheheʻe ʻia ka kahe o ka heheʻe, paʻakikī ka hana extrusion, a pono e hoʻohui ʻia nā mea lapaʻau e hoʻomaikaʻi i ke kahe e hoʻomaʻamaʻa. hoʻoheheʻe extrusion.I ka manawa like, pono e hoʻohui ka plastic matrix i nā mea hoʻohui like ʻole e hoʻomaikaʻi ai i kāna hana hana a me ka hoʻohana ʻana i ka huahana i hoʻopau ʻia, e hoʻomaikaʻi i ka ikaika paʻa ma waena o ka pauka lāʻau a me ka polymer a me nā ʻano mechanical o ka mea hoʻohui.ʻO nā mea hoʻohui maʻamau i hoʻohana ʻia i kēia mau ʻāpana:

a) Hiki i ka mea hoʻohui ke hana i ka pilina pili ikaika ma waena o ka plastic a me ka ʻili o ka pauka lāʻau;I ka manawa like, hiki iā ia ke hōʻemi i ka lawe ʻana o ka wai o ka pauka lāʻau a hoʻomaikaʻi i ka hoʻohālikelike ʻana a me ka hoʻopuehu ʻana o ka pauka lāʻau a me ka plastic, no laila e hoʻomaikaʻi nui ʻia nā ʻano mechanical o nā mea hoʻohui.ʻO nā mea hoʻohui maʻamau: isocyanate, isopropylbenzene peroxide, aluminate, phthalates, silane coupling agent, maleic anhydride modified polypropylene (MAN-g-PP), ethylene-acrylate (EAA).ʻO ka mea maʻamau, ʻo ka nui o ka hui hui ʻana he 1wt% ~ 8wt% o ka nui o ka pauka lāʻau, e like me ka silane coupling agent hiki ke hoʻomaikaʻi i ka hoʻopili ʻana o ka plastic a me ka pauka lāʻau, hoʻomaikaʻi i ka hoʻopuehu ʻana o ka pauka lāʻau, hoʻemi i ka hoʻoheheʻe wai, a me ka alkaline. ʻO ka mālama ʻana i ka pauka lāʻau hiki ke hoʻomaikaʻi wale i ka hoʻopuehu ʻana o ka pauka lāʻau, ʻaʻole hiki ke hoʻomaikaʻi i ka absorption wai o ka pauka lāʻau a me kona adhesion me ka plastic.Pono e hoʻomaopopo ʻia e loaʻa i ka maleate coupling agent a me ka stearate lubricant ka hopena repulsive, kahi e alakaʻi ai i ka emi ʻana o ka maikaʻi o ka huahana a me ka hua ke hoʻohana pū ʻia.

b) Plasticizer No kekahi mau resins me ke aniani kiʻekiʻe ka wela hoʻololi a me ka hehee kahe viscosity, e like me ka paʻakikī PVC, paʻakikī ke hana i ka wā e hui pū ʻia me ka pauka lāʻau, a pono pinepine e hoʻohui i ka plasticizer e hoʻomaikaʻi i kāna hana hana.Plasticizer molecular structure loaʻa nā genes polar a me non-polar, ma lalo o ka hana o ke kiʻekiʻe wela wela, hiki iā ia ke komo i ke kaulahao polymer molecular, ma o nā genes polar e huki kekahi i kekahi e hana i kahi ʻōnaehana like a paʻa, a me kona hoʻokomo ʻana i ka mole non-polar lōʻihi. hoʻonāwaliwali i ka huki like ʻana o nā molekele polymer, i maʻalahi ka hana.Hoʻohui pinepine ʻia ʻo Dibutyl phthalate (DOS) a me nā mea plasticizer ʻē aʻe i nā mea hoʻohui lāʻau.No ka laʻana, i loko o ka PVC lāʻau pauka composite mea, hiki i ka hoʻohui ʻana o ka plasticizer DOP ke hoʻemi i ka mahana hana, hoʻemi i ka decomposition a me ka uahi o ka pauka lāʻau, a hoʻomaikaʻi i ka ikaika tensile o ka mea composite aʻo ka hoʻonui ʻana o ka elongation me ka piʻi ʻana o ka maʻiʻo DOP.

c) Lubricants Pono pinepine nā lubricants Wood-plastic composites e hoʻonui i ka wai o ka hoʻoheheʻe a me ka maikaʻi o ka ʻili o nā huahana extruded, a ua māhele ʻia nā lubricants i hoʻohana ʻia i loko o nā lubricants a me nā lubricants waho.ʻO ke koho ʻana o ka lubricant kūloko e pili ana i ka resin matrix i hoʻohana ʻia, pono e loaʻa i ka resin ma ke kiʻekiʻe wela, a hana i kekahi hopena plasticizing, e hoʻemi i ka ikehu cohesion ma waena o nā molekala i loko o ka resin, hoʻonāwaliwali i ka friction like ma waena o nā mole, i loko. e ho'ēmi i ka viscosity hehee o ka resin a hoʻomaikaʻi i ka melt fluidity.Hoʻokani maoli ka lubricant waho i ka hana o ka lubrication interface ma waena o ka resin a me ka pauka lāʻau i ka hoʻoheheʻe ʻana i ka plastik, a ʻo kāna hana nui ʻo ia ka hoʻolaha ʻana i ka hoʻoheheʻe ʻana o nā ʻāpana resin.ʻO ka maʻamau, loaʻa i ka lubricant nā waiwai lubrication kūloko a me waho.He hopena ko nā Lubricants i ke ola lawelawe o ka mold, barrel and screw, ka mana hana o ka extruder, ka hoʻohana ʻana i ka ikehu i ke kaʻina hana, ka hoʻopau ʻana o ka huahana a me ka hopena haʻahaʻa haʻahaʻa haʻahaʻa o ka ʻike.ʻO nā lubricants maʻamau: zinc stearate, ethylene bisfatty acid amide, polyester wax, stearic acid, lead stearate, polyethylene wax, paraffin wax, oxidized polyethylene wax a pēlā aku.

d) Colorant I ka hoʻohana 'ana i ka laau-plastic composite mea, ka solvable mea i loko o ka lāʻau pauka mea maʻalahi e neʻe i ka ili o ka huahana, no laila, i ka huahana decolorization, a hope lilo hina, okoa huahana i loko o kekahi hoʻohana kaiapuni, akā. hua ʻeleʻele a ʻeleʻele paha.No laila, hoʻohana nui ʻia nā kala kala i ka hana ʻana i nā mea lāʻau-plastic composite.Hiki iā ia ke hana i ke kala like a paʻa i ka huahana, a lohi ka decolorization.

e) He nui nā pōmaikaʻi o ka mea hoʻoheheʻe ʻana i ka lāʻau-plastic composite material, akā ma muli o ka composite o ka resin a me ka pauka lāʻau, ua hoʻemi ʻia kona ductility a me ka hopena o ka hopena, palupalu ka mea, a ʻoi aku ka nui o ka nui ma mua o ka lāʻau kahiko. nā huahana, e kaupalena ana i kona hoʻohana ākea.Ma muli o ke ʻano o ka puʻupuʻu maikaʻi, hiki i ka mea hoʻohui lāʻau-plastic composite ke passivate i ka piko o ka māwae a pale pono i ka hoʻonui ʻana o ka māwae, pēlā e hoʻomaikaʻi nui ai i ka hopena a me ka ductility o ka mea, a e hōʻemi nui i ka nui o ka huahana.Nui nā ʻano mea puhi puhi, a ʻelua mau mea maʻamau i hoʻohana ʻia: endothermic blowing agents (e like me ka sodium bicarbonate NaHCO3) a me exothermic blowing agents (azodibonamide AC), ʻokoʻa ka ʻano decomposition thermal, a he ʻokoʻa nā hopena i ka viscoelasticity a ʻO ka hoʻoheheʻe ʻana o ka polymer melt, no laila e koho ʻia ka mea hoʻoheheʻe kūpono e like me nā koi o ka hoʻohana ʻana i nā huahana.

f) Ua ulu wikiwiki ka noi o nā UV stabilizers a me nā mea hoʻoponopono UV ʻē aʻe me ka hoʻomaikaʻi ʻana i nā koi o nā kānaka no ka maikaʻi a me ka lōʻihi o nā composites lāʻau-plastic.Hiki iā ia ke hoʻohaʻahaʻa i ka polymer i loko o ka mea hoʻohuihui a i ʻole ka emi ʻana o nā waiwai mechanical.Hoʻohana maʻamau ʻia nā mea hoʻopaʻa māmā amine a me nā mea hoʻopaʻa ultraviolet.Eia kekahi, i mea e hiki ai i ka mea hoʻohui ke mālama i kahi hiʻohiʻona maikaʻi a me ka hana maikaʻi loa, pono pinepine e hoʻohui i nā mea antibacterial, a ʻo ke koho ʻana o nā mea antibacterial e noʻonoʻo i ke ʻano o ka pauka lāʻau, ka nui o ka hoʻohui, ka bacteria i loko. ka hoʻohana ʻana i nā mea hoʻohuihui, ka wai o ka huahana a me nā mea ʻē aʻe.ʻO Zinc borate, no ka laʻana, he mea mālama akā ʻaʻole algal.

ʻO ka hana ʻana a me ka hoʻohana ʻana i nā mea hana lāʻau-plastic composite ʻaʻole e hoʻokuʻu i nā volatiles e hōʻino i ke olakino kanaka i ke kaiapuni a puni, a ʻo nā huahana lāʻau-plastic ponoʻī hiki ke hana hou ʻia a hoʻohana hou ʻia, no laila ʻo nā huahana lāʻau-plastic he ʻano hou o ka pale ʻōmaʻomaʻo. nā huahana, hiki ke hoʻomaʻemaʻe iā ʻoe iho i ka ékological a loaʻa nā manaʻo hoʻomohala ākea