application

WPC chinhu chakaumbwa chakaumbwa nekushandisa inopisa yakanyunguduka mapurasitiki, anosanganisira polyethylene, polypropylene, polyvinyl chloride uye copolymers avo seanonamira, vachishandisa huni hupfu hwakaita sehuni, huswa hwekurima hwekurima, kurima chirimwa goko rehupfu sezvinhu zvekuzadza, extrusion molding kana nzira yekutsikirira, jekiseni kuumba nzira.Iyo inopisa inonyunguduka yepurasitiki yakasvibirira inogona kushandiswa mumaindasitiri kana hupenyu hwemarara zvinhu, huni huni hunogonawo kushandiswa huni hwekugadzira tsvina, huni hudiki uye humwe huni hwakaderera.Kubva pakuona kwekugadzirwa kwezvinhu, zvigadzirwa zvepurasitiki zvehuni zvinononoka uye zvinobvisa kusvibiswa kwemarara epurasitiki, uye zvakare kubvisa kusvibiswa kunokonzerwa nekupiswa kwezvirimwa zvekurima kune zvakatipoteredza.Kusarudzwa kweformula yezvinhu mucomposite process kunosanganisira zvinotevera zvinhu:

1. Mapolima

Mapurasitiki anoshandiswa mukugadzirwa kwehuni-plastiki composites anogona kuva thermoset plastiki uye thermoplastics, thermoset mapurasitiki akadai epoxy resins, thermoplastics se polyethylene (PE), polypropylene (PP) uye polyoxyethylene (PVC).Nekuda kwekusagadzikana kwehuni kugadzikana kwehuni, chete thermoplastics ine tembiricha yekugadzira iri pasi pe200 ° C ndiyo inoshandiswa zvakanyanya, kunyanya polyethylene.Kusarudzwa kwemapolymer epurasitiki kunonyanya kuenderana nehunhu hwepolymer, zvinodiwa zvechigadzirwa, kuwanikwa kwezvinhu, mutengo uye chiyero chekujairana nazvo.Zvakadai se: polypropylene inonyanya kushandiswa muzvigadzirwa zvemotokari uye zvigadzirwa zvehupenyu hwezuva nezuva, PVC inonyanya kushandiswa pakuvaka magonhi neWindows, paving panels nezvimwe zvakadaro.Pamusoro pezvo, iyo melt flow rate (MFI) yepurasitiki inewo chimwe chinokanganisa pamidziyo yezvinhu zvinoumbwa, pasi pemamiriro akafanana ekugadzirisa, iyo MFI yeresin yakakwirira, kupindira kwehuni kwehuni kuri nani. kugoverwa kwehuni yehuni kunowedzera yunifomu, uye kupindira uye kugoverwa kwehuni yehuni kunokanganisa maitiro emagetsi ezvinyorwa zvinosanganiswa, kunyanya simba rekuita.

2. Zvinowedzera

Sezvo huni hupfu hune kunyura kwemvura kwakasimba uye polarity yakasimba, uye yakawanda thermoplastics isiri-polar uye hydrophobic, kugarisana pakati pezviviri izvi kwakashata, uye iyo interface yekubatanidza simba idiki kwazvo, uye akakodzera anowedzera anowanzoshandiswa kugadzirisa pamusoro pepolymer. uye huni hupfu kuvandudza interface kuwirirana pakati pehuni hupfu uye resin.Uyezve, kupararira kwehupfu hwehuni hwakanyungudutswa mune yakanyungudutswa thermoplastics mhedzisiro, kuita kuti kunyungudika kuyerera kuve kwakashata, extrusion process yakaoma, uye maajenti ekurapa epamusoro anofanirwa kuwedzerwa kuvandudza kuyerera kufambisa. extrusion molding.Panguva imwecheteyo, matrix epurasitiki inodawo kuwedzera zvakasiyana-siyana zvekuwedzera kuti ivandudze kushanda kwayo uye kushandiswa kwechigadzirwa chakapedzwa, kuvandudza simba rinosunga pakati pehuni hupfu uye polymer uye michina yezvigadzirwa zvezvinhu zvinosanganiswa.Zvinowanzo shandiswa additives zvinosanganisira zvinotevera zvikamu:

a) Coupling mumiririri anogona kuburitsa yakasimba interface bonding pakati pepurasitiki nehuni hupfu hwepamusoro;Panguva imwecheteyo, inogona kuderedza kunyura kwemvura yehuni yehuni uye kuvandudza kuenderana uye kupararira kwehuni hupfu nepurasitiki, saka iyo mechanical properties ye composite zvinhu inovandudzwa zvakanyanya.Anowanzo shandiswa coupling agents ndeaya: isocyanate, isopropylbenzene peroxide, aluminate, phthalates, silane coupling agent, maleic anhydride modified polypropylene (MAN-g-PP), ethylene-acrylate (EAA).Kazhinji, huwandu hwekuwedzera hwekubatanidza mumiriri ndeye 1wt% ~ 8wt% yehuwandu hwakawedzerwa hupfu hwehuni, senge silane coupling agent inogona kuvandudza kunamatira kwepurasitiki nehupfu hwehuni, kuvandudza kupararira kwehuni hupfu, kuderedza kunyura kwemvura, uye alkaline. kurapwa kwehuni huni hunogona kungovandudza kupararira kwehuni yehuni, haigoni kuvandudza kunwa kwemvura yehuni yehuni uye kunamatira kwayo nepurasitiki.Izvo zvinofanirwa kucherechedzwa kuti maleate coupling agent uye stearate lubricant ichave neanosemesa maitiro, izvo zvinozotungamira mukudzikira kwemhando yechigadzirwa uye goho kana ikashandiswa pamwechete.

b) Plasticizer Kune mamwe maresini ane high glass transition temperature uye melt flow viscosity, zvakadai sekuoma kwePVC, zvakaoma kugadzirisa kana yakabatanidzwa nehupfu hwehuni, uye inowanzodiwa kuwedzera plasticizer kuti ivandudze kushanda kwayo.Plasticizer molecular chimiro ine polar uye isiri-polar genes, pasi pekuita kwekushisa kwepamusoro shear, inogona kupinda mu polymer molecular chain, kuburikidza ne polar genes inokwezvana kuti igadzire yunifomu uye yakagadzikana sisitimu, uye yayo yakareba isiri-polar molecule yekuisa. inoderedza kukwezvana kwepolymer mamorekuru, kuitira kuti kugadzirisa kuve nyore.Dibutyl phthalate (DOS) nemamwe maplasticizers anowanzowedzerwa kumapuranga-plastiki composites.Semuyenzaniso, muPVC huni poda inoumbwa zvinhu, kuwedzera kweplasticizer DOP kunogona kuderedza tembiricha yekugadzira, kuderedza kuparara uye utsi hwehuni hupfu, uye kunatsiridza kusimba kwekusimba kwezvinhu zvinoumbwa nepo kureba panguva yekuzorora kunowedzera nekuwedzera iyo DOP yemukati.

c) Mafuta ekugadzira Wood-plastiki macomposites anowanzoda kuwedzera mafuta ekuvandudza kunyunguduka uye kunaka kwepamusoro pezvigadzirwa zvakaburitswa, uye mafuta anoshandiswa akakamurwa kuva mafuta emukati uye ekunze ekunze.Sarudzo yemafuta emukati ane hukama ne matrix resin inoshandiswa, iyo inofanirwa kuenderana zvakanaka neresin pakupisa kwakanyanya, uye kuburitsa imwe plasticizing mhedzisiro, kuderedza simba rekubatana pakati pemamorekuru muresin, kuderedza kupokana pakati pemamorekuru. kuti uderedze kunyungudika viscosity ye resin uye kuvandudza kunyunguduka kwemvura.Iyo yekunze lubricant inonyatso tamba basa rekuzora pakati peresin nehuni hupfu mupurasitiki yekuumba kugadzira, uye basa rayo guru nderekusimudzira kutsvedza kwezvikamu zveresin.Kazhinji lubricant kazhinji ine zvese zviri zviviri mukati nekunze kwekuzora zvivakwa.Mafuta ekuzora ane chimwe chinokanganisa pahupenyu hwesevhisi ye mold, mbiya uye screw, kugona kwekugadzira kweiyo extruder, mashandisiro esimba mukugadzira maitiro, kupedzisa kwechigadzirwa uye kuderera kwekushisa kwekuita kweprofile.Mafuta anowanzo shandiswa ndeaya: zinc stearate, ethylene bisfatty acid amide, polyester wax, stearic acid, lead stearate, polyethylene wax, paraffin wax, oxidized polyethylene wax uye zvichingodaro.

d) Colourant Mukushandiswa kwehuni-plastic composite zvinhu, chinhu chinogadziriswa muhupfu hwehuni chiri nyore kutamira pamusoro pechigadzirwa, kuitira kuti chigadzirwa decolorization, uye pakupedzisira chive grey, zvigadzirwa zvakasiyana mune imwe nzvimbo yekushandisa, asi. inoburitsawo makwapa matema kana ngura.Nokudaro, mavara emavara anoshandiswawo zvakanyanya mukugadzirwa kwehuni-plastiki inoumba zvinhu.Inogona kuita kuti chigadzirwa chive neyunifomu uye yakagadzikana ruvara, uye decolorization inononoka.

e) Kuputira furo huni-plastiki inoumbwa zvinhu zvine zvakawanda zvakanakira, asi nekuda kwekuumbwa kweresin nehupfu yehuni, ductility yayo uye kupikisa kwesimba kunodzikiswa, zvinhu zvacho zvine brittle, uye density yacho yakakura zvakapetwa ka2 pane iyo yematanda echinyakare. zvigadzirwa, kuderedza kushandiswa kwayo kwakakura.Nekuda kweiyo yakanaka bubble chimiro, iyo yakapupuma huni-yepurasitiki composite inogona kupfuudza iyo yekutsemuka tipi uye zvinodzivirira kudzivirira kuwedzera kwekutsemuka, nekudaro ichivandudza zvakanyanya kupikisa kwemaitiro uye ductility yechinhu, uye nekudzikisa zvakanyanya kuwanda kwechigadzirwa.Kune mhando dzakawanda dzemaajenti ekufuridza, uye kune maviri anowanzo shandiswa: endothermic blowing agents (sesodium bicarbonate NaHCO3) uye exothermic blowing agents (azodibonamide AC), ane hunhu hwekuwora hwekupisa hwakasiyana, uye hune mhedzisiro dzakasiyana pane viscoelasticity uye. foaming fomu yepolymer melt, saka iyo yakakodzera yekufuridza mumiriri inofanirwa kusarudzwa zvinoenderana nezvinodiwa zvekushandiswa kwezvigadzirwa.

f) Iko kushandiswa kweUV stabilizers uye mamwe maUV stabilizers akagadzirawo nekukurumidza nekuvandudzwa kwezvinodiwa zvevanhu zvemhando uye kusimba kwehuni-plastiki composites.Iyo inogona kuita iyo polymer mune inoumbwa zvinhu haideredze kana michina zvimiro kudzikira.Inowanzo shandiswa yakavharwa amine light stabilizers uye ultraviolet absorbers.Mukuwedzera, kuitira kuti ugadzire zvinhu zvakasanganiswa zvinogona kuchengetedza chitarisiko chakanaka uye kushanda kwakakwana, zvinowanzodiwa kuwedzera antibacterial agents, uye kusarudzwa kwemishonga inorwisa mabhakitiriya inofanira kufunga nezvemhando yehuni yehuni, chiyero chekuwedzera, mabhakitiriya mukati. iyo composite zvinhu zvekushandisa nharaunda, mvura yemukati yechigadzirwa uye zvimwe zvinhu.Zinc borate, somuenzaniso, inochengetedza asi kwete algal.

Kugadzirwa uye kushandiswa kwehuni-plastiki inoumbwa zvinhu hazvizobudisi zvinokanganisa zvinokuvadza hutano hwevanhu kune zvakapoteredzwa zvakatipoteredza, uye zvigadzirwa zvehuni-plastiki pachazvo zvinogona kudzokororwa uye kushandiswa zvakare, saka zvigadzirwa zvehuni-plastiki rudzi rutsva rwekuchengetedzwa kwezvakatipoteredza. zvigadzirwa, izvo zvinogona kuve zvichenese ecological uye zvine tarisiro yakakura yebudiriro