Gabatarwa: A matsayin ɗaya daga cikin manyan robobi na gabaɗaya, ana iya ganin PP a ko'ina cikin rayuwar yau da kullun. Yana da mafi girma tsarki fiye da talakawa pc. Ko da yake ba shi da babban launi na ABS, PP yana da mafi girman tsabta da ma'anar launi. A cikin masana'antu, ana amfani da kayan PP sau da yawa a cikin kayan aiki irin sukwalabe na filastik, kwalban kwalba, kirim kwalabe, da sauransu. Ina warware taRB PACKAGEkuma an raba tare da sarkar samarwa don tunani:
Sunan sinadarai: Polypropylene
Sunan Ingilishi: Polypropylene (ana nufin PP)
PP shine polymer crystalline. Daga cikin robobi da aka saba amfani da su, PP shine mafi sauƙi, tare da yawa kawai 0.91g/cm3 (kasa da ruwa). Daga cikin robobi na gaba ɗaya, PP yana da mafi kyawun juriya na zafi. Matsalolin zafinsa yana da 80-100 ° C kuma ana iya dafa shi a cikin ruwan zãfi. PP yana da kyakkyawan juriya mai fashewar damuwa da rayuwar gajiya mai ƙarfi. An fi saninsa da "100% filastik". Cikakken aikin PP ya fi na kayan PE. Samfuran PP suna da nauyi mai sauƙi, ƙaƙƙarfan ƙarfi da kuma juriya mai kyau.
Rashin hasara na PP: ƙananan daidaitattun ƙididdiga, rashin isasshen ƙarfi, rashin juriya mara kyau, mai sauƙi don samar da "lalacewar jan karfe", yana da abin da ya faru bayan raguwa, bayan rushewa, yana da sauƙin tsufa, ya zama gaggautuwa, da sauƙi don lalacewa.
01
Halayen gyare-gyare
1) Kayan crystalline yana da ƙananan hygroscopicity kuma yana da sauƙi don narke karaya, kuma yana da sauƙi don bazuwa a cikin dogon lokaci lamba tare da karfe mai zafi.
2) Ruwan ruwa yana da kyau, amma raguwar kewayon da ƙimar ƙima suna da girma, kuma raguwar ramuka, ɓarna, da nakasawa suna da sauƙin faruwa.
3) Gudun sanyi yana da sauri, tsarin zubar da ruwa da tsarin sanyaya ya kamata a hankali ya watsar da zafi, kuma kula da sarrafa zafin jiki na gyare-gyare. Yanayin zafin jiki yana da sauƙi don daidaitawa a ƙananan zafin jiki da matsa lamba. Lokacin da zafin jiki ya kasance ƙasa da digiri 50, ɓangaren filastik ba shi da santsi, kuma yana da sauƙi don samar da walda mara kyau, alamomin kwarara, Mai saurin warping da nakasawa sama da digiri 90.
4) Dole ne kaurin bangon filastik ya zama iri ɗaya don kauce wa rashin mannewa da sasanninta masu kaifi don hana damuwa.
02
Halayen tsari
PP yana da ruwa mai kyau a zafin jiki mai narkewa da kyakkyawan aikin gyaran fuska. PP yana da halaye guda biyu a cikin sarrafawa
Na ɗaya: Dankin narkewar PP yana raguwa sosai tare da haɓaka ƙimar juzu'i (ƙasasshen yanayin zafi)
Na biyu: Matsayin yanayin daidaitawar kwayoyin halitta yana da girma kuma yawan raguwa yana da girma.
The aiki zafin jiki na PP ne a kusa da 200-300 ℃. Yana da kyakkyawan kwanciyar hankali na thermal (zazzabi na bazuwar shine 310 ℃), amma a babban zafin jiki (270-300 ℃), yana iya ƙasƙantar da shi idan ya daɗe a cikin ganga. Saboda danko na PP yana raguwa sosai tare da karuwar saurin juzu'i, haɓaka matsa lamba na allura da saurin allura zai ƙara yawan ruwa kuma inganta haɓakar raguwa da damuwa. Ya kamata a sarrafa zafin jiki na mold a cikin kewayon 30-50 ℃. Narkewar PP na iya wucewa ta ƙunƙuntaccen tazarar ƙira kuma ya bayyana a gaba. A cikin tsarin narkewa na PP, dole ne ya sha babban adadin zafi na fusion (mafi girma musamman zafi), kuma samfurin ya fi zafi bayan an fitar da shi daga mold. Kayan PP baya buƙatar bushewa yayin aiki, kuma raguwar raguwa da crystallinity na PP sun kasance ƙasa da na PE.
03
Abubuwan lura a cikin sarrafa filastik
sarrafa filastik
Pure PP farar hauren giwa ne mai jujjuyawa kuma ana iya rina shi da launuka daban-daban. Za a iya rina PP kawai tare da masterbatch mai launi akan injunan gyare-gyare na gabaɗaya, amma wasu samfuran suna da abubuwan filastik masu zaman kansu waɗanda ke ƙarfafa tasirin haɗuwa, kuma ana iya rina su da toner.
Kayayyakin da ake amfani da su a waje gabaɗaya suna cike da masu daidaita UV da baƙin carbon. Matsakaicin amfani da kayan da aka sake yin fa'ida bai kamata ya wuce 15% ba, in ba haka ba zai haifar da raguwar ƙarfi da bazuwar da canza launi. Gabaɗaya, ba a buƙatar magani na bushewa na musamman kafin sarrafa allurar PP.
Zaɓin na'urar gyare-gyaren allura
Babu buƙatu na musamman don zaɓin injunan gyare-gyaren allura. Saboda PP yana da babban crystallinity. Ana buƙatar injin yin gyare-gyaren allurar kwamfuta tare da matsananciyar allura da sarrafa matakai da yawa. Ƙarfin matsawa gabaɗaya ana ƙaddara ta 3800t/m2, kuma ƙarar allurar shine 20% -85%.
Mold da ƙirar kofa
A mold zafin jiki ne 50-90 ℃, da kuma high mold zafin jiki da ake amfani da mafi girma size bukatun. Matsakaicin zafin jiki ya fi 5 ℃ ƙasa da zafin rami, diamita mai gudu shine 4-7mm, tsayin ƙofar allura shine 1-1.5mm, diamita na iya zama ƙarami kamar 0.7mm.
Tsawon ƙofar gefen yana da gajere kamar yadda zai yiwu, kimanin 0.7mm, zurfin shine rabin kauri na bango, kuma nisa shine sau biyu na bangon, kuma a hankali yana ƙaruwa tare da tsawon narkewar ruwa a cikin rami.
Dole ne mold ya sami iska mai kyau. Ramin huɗa yana da zurfin 0.025mm-0.038mm da kauri 1.5mm. Don guje wa alamar raguwa, yi amfani da manyan nozzles da masu zagaye da madauwari, kuma kauri daga cikin haƙarƙari ya kamata ya zama ƙananan (Misali, 50-60% na kauri na bango).
Kauri daga samfuran da aka yi da homopolymer PP bai kamata ya wuce 3mm ba, in ba haka ba za a sami kumfa (kayayyakin bango mai kauri na iya amfani da copolymer PP kawai).
Yanayin narkewa
Matsakaicin narkewa na PP shine 160-175 ° C, kuma zafin jiki na lalacewa shine 350 ° C, amma yanayin zafin jiki ba zai iya wuce 275 ° C yayin sarrafa allura ba. Zazzabi a cikin sashin narkewa ya fi dacewa 240 ° C.
Gudun allura
Don rage damuwa na ciki da nakasawa, ya kamata a zaɓi allura mai sauri, amma wasu maki na PP da molds ba su dace ba (kumfa da layin iska a cikin rigar mutum). Idan shimfidar tsari ta bayyana tare da haske da ratsan duhu da aka watsa ta hanyar ƙofar, ya kamata a yi amfani da allura mai ƙarancin sauri da zafin jiki mafi girma.
Narke baya matsa lamba
Za a iya amfani da matsa lamba na 5bar narke mannewa, kuma ana iya daidaita matsa lamba na baya na kayan toner daidai.
Allura da kuma riƙe matsi
Yi amfani da matsa lamba mafi girma (1500-1800bar) da riƙe matsa lamba (kimanin 80% na matsa lamba na allura). Canja zuwa matsa lamba a kusan 95% na cikakken bugun jini, kuma yi amfani da lokaci mai tsayi.
Bayan sarrafa samfuran
Don hana raguwa da lalacewa ta hanyar post-crystallization, samfuran gabaɗaya suna buƙatar jiƙa a cikin ruwan zafi.
Abubuwan da aka bayar na Shanghai Rainbow Industrial Co., Ltdshi ne manufacturer,Kunshin bakan gizo na ShanghaiSamar da marufi na gyaran fuska guda ɗaya.Idan kuna son samfuranmu, zaku iyatuntube mu,
Yanar Gizo:www.rainbow-pkg.com
Imel:Bobby@rainbow-pkg.com
WhatsApp: +008613818823743
Lokacin aikawa: Oktoba-04-2021