Nhanganyaya: Seimwe yemapurasitiki anoshandiswa zvakanyanya, PP inogona kuoneka kwese kwese muhupenyu hwezuva nezuva. Iine kuchena kwepamusoro pane yakajairwa pc. Kunyangwe isina iyo yakakwira coloring yeABS, PP ine kuchena kwepamusoro uye kupa kwemavara. Muindasitiri, PP zvinhu zvinowanzo shandiswa mukurongedza zvinhu zvakaita semabhodhoro epurasitiki, zvivharo zvebhodhoro, mabhodhoro ekirimu, etc. NdinorongedzerwaRB PACKAGEuye yakagovaniswa neyekutengesa kune referensi:
Zita remakemikari: Polypropylene
Zita reChirungu: Polypropylene (inonzi PP)
PP icrystalline polymer. Pakati pemapurasitiki anowanzo shandiswa, PP ndiyo yakareruka, ine density ye 0.91g/cm3 chete (pasi pemvura). Pakati pemapurasitiki-chinangwa, PP ine yakanyanya kupisa kupisa. Kupisa kwayo kunokanganisa kupisa ndeye 80-100 ° C uye inogona kubikwa mumvura inopisa. PP ine yakanaka kushushikana yekupwanya kuramba uye yakakwirira kukotama hupenyu hwekuneta. Inowanzozivikanwa se "100% plastiki". Kuita kwakazara kwePP kuri nani pane kuya kwePE zvinhu. Zvigadzirwa zvePP zvine huremu huremu, kusimba kwakanaka uye kwakanaka kwemakemikari kuramba.
Kukanganisa kwePP: kuderera kwechimiro, kusakwana kusimba, kushomeka kwemamiriro ekunze, nyore kugadzira "mhangura kukuvadzwa", ine post-shrinkage chiitiko, mushure mekudhirowa, zviri nyore kuchembera, kuve brittle, uye nyore kuremara.
01
Kuumba maitiro
1) Iyo crystalline zvinhu ine yakaderera hygroscopicity uye inokurumidza kunyunguduka kuputsika, uye zviri nyore kuora mukusangana kwenguva refu nesimbi inopisa.
2) The fluidity yakanaka, asi shrinkage range uye shrinkage kukosha yakakura, uye shrinkage maburi, dents, uye deformation zviri nyore kuitika.
3) Iyo yekutonhora yekumhanya inokurumidza, iyo yekudurura sisitimu uye yekutonhodza system inofanirwa kudzima kupisa zvishoma nezvishoma, uye teerera pakudzora tembiricha yekuumba. Iyo tembiricha yemidziyo iri nyore kutariswa pane yakaderera tembiricha uye yakanyanya kudzvanywa. Kana tembiricha yekuumbwa yakadzikira kupfuura 50 madhigirii, chikamu chepurasitiki hachina kutsvedzerera, uye zviri nyore kuburitsa urombo husina kunaka, kuyerera mamaki, Inotapukira kuhondo uye deformation pamusoro pe90 madhigirii.
4) Ukobvu hwepurasitiki hwemadziro hunofanirwa kuve hwakafanana kuti udzivise kushaikwa kweglue uye makona akapinza kudzivirira kushushikana mupfungwa.
02
Maitiro maitiro
PP ine mvura yakanaka pakunyunguduka tembiricha uye kuita kwakanaka kwekuumba. PP ine maitiro maviri mukugadzirisa
Imwe: Iyo viscosity yePP inonyunguduka inoderera zvakanyanya nekuwedzera kweshear rate (ishoma inokanganiswa nekushisa)
Chechipiri: Dhigirii rema molecular orientation yakakwirira uye shrinkage rate yakakwira zvakanyanya.
Iyo tembiricha yePP inotenderera 200-300 ℃. Iine kugadzikana kwakanaka kwekupisa (tembiricha yekuora i310 ℃), asi pakupisa kwakanyanya (270-300 ℃), inogona kudzikisira kana ikagara mudhiramu kwenguva yakareba. Nekuti viscosity yePP inodzikira zvakanyanya nekuwedzera kweshear kumhanya, kuwedzera jekiseni kudzvanywa uye jekiseni kumhanya kuchawedzera fluidity uye kunatsiridza shrinkage deformation uye kuora mwoyo. Iyo tembiricha yekuumbwa inofanirwa kudzorwa mukati meiyo 30-50 ℃. PP inonyungudika inogona kupfuura nepaburi rakatetepa mold uye kuoneka kumberi. Mukunyunguduka kwePP, inofanirwa kutora huwandu hwakawanda hwekupisa kwekusanganiswa (yakakura chaiyo kupisa), uye chigadzirwa chinopisa mushure mekudzingwa kubva muforoma. PP zvinhu hazvidi kuomeswa panguva yekugadzirisa, uye shrinkage rate uye crystallinity yePP yakaderera pane iyo yePE.
03
Pfungwa dzekucherechedza mukugadzirwa kwepurasitiki
Plastic processing
Pure PP inopenya yenzou chena uye inogona kudhayiwa nemavara akasiyana. PP inogona chete kudhayiwa neruvara masterbatch pajekiseni jekiseni rekugadzira muchina, asi mamwe mamodheru ane akazvimirira epurasitiki zvinhu zvinosimbisa kusanganisa maitiro, uye anogona zvakare kudhayiwa ne toner.
Zvigadzirwa zvinoshandiswa kunze zvinowanzozadzwa neUV stabilizers uye kabhoni nhema. Chiyero chekushandiswa kwezvinhu zvakadzokororwa hazvifanirwe kudarika 15%, zvikasadaro zvinokonzeresa kudonha kwesimba uye kuora uye kushanduka. Kazhinji, hapana yakakosha yekuomesa kurapwa inodiwa pamberi pePP jekiseni kugadzirisa.
Jekiseni molding muchina kusarudzwa
Iko hakuna zvakakosha zvinodiwa pakusarudzwa kwejekiseni molding michina. Nekuti PP ine yakakwira crystallinity. Muchina wekugadzira jekiseni rekombuta une kudzvanywa kwejekiseni yepamusoro uye multi-stage control inodiwa. Iyo clamping simba rinowanzo kutsanangurwa ne3800t/m2, uye huwandu hwejekiseni i20% -85%.
Mold uye gedhi dhizaini
Iyo tembiricha yekuumbwa ndeye 50-90 ℃, uye tembiricha yakakwira mold inoshandiswa kune yakakwira saizi zvinodiwa. Iyo tembiricha yepakati inopfuura 5 ℃ yakaderera pane tembiricha yegomba, iyo mumhanyi dhayamita i4-7mm, kureba kwegedhi retsono i1-1.5mm, uye dhayamita inogona kuita diki se0.7mm.
Kureba kwegedhi rekumucheto kwakapfupika sezvinobvira, inenge 0.7mm, yakadzika hafu yehupamhi hwemadziro, uye hupamhi huri kaviri rusvingo rwemadziro, uye zvishoma nezvishoma inowedzera nekureba kwekunyunguduka kunoyerera mumhango.
Iyo mold inofanira kuva nemhepo yakanaka. Gomba remhepo rakadzika 0.025mm-0.038mm uye gobvu 1.5mm. Kuti udzivise shrinkage mamaki, shandisa mahombe uye akatenderera nozzles uye denderedzwa kumhanya, uye ukobvu hwembabvu hunofanira kunge hudiki (Somuenzaniso, 50-60% yemadziro ukobvu).
Ukobvu hwezvigadzirwa zvakagadzirwa nehomopolymer PP hazvifanirwe kudarika 3mm, zvikasadaro pachava nemabhuru (zvakakora zvemadziro zvigadzirwa zvinogona kushandisa copolymer PP chete).
Kunyunguduka tembiricha
Nzvimbo yakanyunguduka yePP ndeye 160-175 ° C, uye tembiricha yekuparara i350 ° C, asi tembiricha yekumisikidza haigone kudarika 275 ° C panguva yekugadzira jekiseni. Tembiricha iri muchikamu chekunyunguduka ingangoita 240°C.
Jekiseni kumhanya
Kuti uderedze kushushikana kwemukati uye deformation, high-speed jekiseni inofanira kusarudzwa, asi mamwe mamakisi ePP uye molds haana kukodzera (mabhuru uye mitsara yemhepo mujasi remunhu). Kana iyo patterned surface ichiita ine chiedza uye mitsetse yakasviba yakaparadzirwa negedhi, jekiseni rakaderera-speed uye yakakwirira mold tembiricha inofanira kushandiswa.
Melt back pressure
5bar melt adhesive back pressure inogona kushandiswa, uye iyo yekumashure kudzvanywa kwezvinhu zve toner inogona kugadziridzwa zvakakodzera.
Jekiseni uye kumanikidza kubata
Shandisa yakakwira jekiseni kudzvanywa (1500-1800bar) uye kubata kumanikidza (inenge 80% yekumanikidza jekiseni). Chinja pakubata kudzvanya panenge pa95% yestroke yakazara, uye shandisa nguva yakareba yekubata.
Mushure mekugadzirisa zvigadzirwa
Kuti udzivirire shrinkage uye deformation inokonzerwa ne-post-crystallization, zvigadzirwa zvinowanzoda kunyikwa mumvura inopisa.
Iyo kambani Shanghai Rainbow Industrial Co., Ltdndiye mugadziri,Shanghai muraraungu packageIpa imwe-stop cosmetic packaging.Kana iwe uchida zvigadzirwa zvedu, unogonataura nesu,
Webhusaiti:www.rainbow-pkg.com
Email:Bobby@rainbow-pkg.com
WhatsApp: +008613818823743
Nguva yekutumira: Oct-04-2021