Gyaran Jiki na Polypropylene
Ƙara ƙarin sinadarai na halitta ko na inorganic zuwa matrix PP ( polypropylene ) yayin haɗawa da haɗawa don samun kayan haɗin PP masu aiki mai kyau. Manyan hanyoyin sun haɗa da gyaran cikawa da gyaran haɗawa.
Cika gyara
A cikin tsarin gyaran gyare-gyare na PP, ana ƙara filaye irin su silicates, calcium carbonate, silica, cellulose, da gilashin gilashi zuwa polymer don inganta juriya na zafi, rage farashin, ƙara ƙarfin hali, da rage gyare-gyare na PP. Duk da haka, ƙarfin tasiri da tsawo na PP zai ragu. Gilashin fiber, a matsayin kyakkyawan inorganic maras ƙarfe maras ƙarfe, yana da ƙarancin farashi, ingantaccen rufi, juriya mai zafi, juriya na lalata, da ƙarfin injina. Ana amfani da shi sosai, kuma aikin PP wanda aka gyara ta hanyar cika fiber gilashi yana inganta sosai. Koyaya, lokacin da abun ciki na fiber gilashin ya kai kusan 30%, ana iya haɓaka kayan aikin injiniyoyi da yawa. Yawan ƙarar fiber na gilashin na iya haifar da rashin isasshen impregnation na wasu filaye na gilashi, wanda ke haifar da rashin aikin haɗin gwiwa tsakanin matrix polymer da filayen gilashi, yana haifar da raguwar ƙarfin injin na kayan haɗin gwiwar. Bugu da ƙari, yayin da abun ciki na gilashin gilashin ya karu, ƙaddamarwar kayan haɗin gwiwar yana raguwa, yana haifar da matsaloli a cikin gyare-gyaren PP da sarrafawa.
Gyaran haɗawa
Haɗa PP (polypropylene) tare da polyethylene, robobin injiniya, thermoplastic elastomers ko roba don haɓaka aikin PP. Ana kammala gyare-gyaren haɗakarwa a cikin kayan sarrafawa kamar na'urori masu haɗawa, buɗaɗɗen niƙa, da masu fitarwa. Tsarin yana da sauƙin sarrafawa, yana da ɗan gajeren sake zagayowar samarwa, da ƙananan farashi, kuma yana iya inganta kaddarorin PP daban-daban kamar launi, iya aiki, kaddarorin antistatic, da juriya mai tasiri. Yin hada-hadar polymer na iya yin amfani da fitattun kaddarorin kowane bangare, da gyara kurakuran kaddarorin kowane bangare, da inganta ingantaccen aikin haɗakarwa. Duk da haka, ƙarancin zafin jiki da juriya na tsufa na PP mai hade ba har yanzu ba su dace ba. A lokacin gyare-gyaren haɗakarwa, ƙarfin ƙarfi na iya haifar da yanke wasu manyan sarƙoƙi na ƙwayoyin cuta kuma su samar da radicals kyauta, waɗanda zasu iya samar da graft ko toshe copolymers kuma suyi aiki yadda yakamata azaman masu dacewa ga PP.
Fasahar gyare-gyaren PP ta fadada filin aikace-aikace na kayan haɗin gwiwar da kuma inganta ƙimar farashi na samfurori, inganta tsarin aikin injiniya na PP, kuma ya fadada aikace-aikacensa daga robobi na gabaɗaya zuwa robobi na injiniya. A cikin 'yan shekarun nan, bincike da haɓaka fasahar gyare-gyare na PP ya haɓaka cikin sauri, kuma an yi amfani da sababbin fasahohi don gyare-gyaren PP, wanda ya inganta ingantaccen aikin PP kuma ya ci gaba da fadada filin aikace-aikacensa, tare da ci gaba mai girma.
Gyaran ƙarfafawa
Ƙara kayan fibrous zuwa robobi na iya inganta ƙarfin kayan filastik, don haka gyaran sunan ƙarfafawa. Kayan aiki tare da babban diamita-zuwa kauri rabo na iya inganta mahimmancin lanƙwasawa (rigidity) na kayan filastik, wanda kuma ana iya kiransa gyaran ƙarfafawa.
Abubuwan ƙarfafawa da aka fi amfani da su a cikin gyaran gyare-gyare na PP (polypropylene) sune gilashin gilashi da samfurori, da carbon fiber, fiber fiber, fiber boron, whiskers, da dai sauransu. mafi yawa wadanda ba alkali gilashi zaruruwa da matsakaici-alkali gilashin zaruruwa, tare da wadanda ba alkali gilashin zaruruwa samun mafi girma adadin. Ana sarrafa diamita na filaye na gilashi a cikin kewayon 6-15μm, kuma dole ne a tabbatar da tsawon filayen gilashin su kasance cikin 0.25-0.76mm, wanda zai iya tabbatar da aikin samfurin kuma ya sa filayen gilashin da kyau tarwatsa.
An yi imani da cewa tsawon filayen gilashin a cikin samfurin ya kamata ya fi 0.2mm don samun tasirin gyarawa. Abubuwan da ke cikin fiber gilashin (rashin taro) shine mafi kyau tsakanin 10% da 30%, kuma aikin yana raguwa lokacin da ya wuce 40%. Bugu da kari, ƙara organosilane hadawa jamiái na iya yin gilashin zaruruwa da PP samar da mai kyau dubawa, inganta lankwasawa modules, taurin, load nakasawa zafin jiki, da kuma musamman girma girma na tsarin hadawa. Gilashin fiber ƙarfafa PP zai iya inganta ƙarfin injiniya da juriya na zafi, kuma juriya ga tururin ruwa, lalata sinadarai, da creep shima yana da kyau. Ana iya amfani da shi azaman robobin injiniya a lokuta da yawa, kamar ruwan fanfo, grilles na dumama, turawa, fitilu, tanderun lantarki, da gidaje masu dumama, da sauransu.
Yayin da samar da polypropylene ke karuwa da sauri, aikinsa kuma yana ci gaba da ingantawa, yana sa aikace-aikacensa ya zama fadi da zurfin canzawa akai-akai. A cikin 'yan shekarun nan, wasu sababbin nau'o'in polypropylene da ke da kaddarorin musamman sun fito, irin su polypropylene na gaskiya da kuma polypropylene mai ƙarfi mai ƙarfi, ko dai ta hanyar inganta yanayin polymerization ko matakan da aka ɗauka a lokacin granulation bayan polymerization.
