Filastik gyare-gyare shi ne taƙaitaccen gyare-gyaren da aka haɗa da ake amfani da shi don gyare-gyaren matsawa, gyaran fuska, allura, gyare-gyaren busa da ƙananan kumfa.Canje-canjen da aka haɗa na mold convex da concave molds da tsarin gyare-gyaren taimako na iya aiwatar da jerin sassa na filastik na siffofi daban-daban da girma dabam dabam.Filayen filastik sune uwar masana'antu, kuma sabbin samfuran da aka saki yanzu sun haɗa da robobi.

Zai fi dacewa ya haɗa da macen mace tare da m kogon da aka haɗa da substrate, wani taro mold hade katin kati, a Bangaren yankan rami da kuma naushi mai ma'auni mai ma'ana wanda ya ƙunshi faranti mai haɗaka da yanke gefe.
Domin inganta aikin robobi, daban-daban kayan taimako, irin su filler, filastik, lubricants, stabilizers, colorants, da dai sauransu, dole ne a ƙara su zuwa polymer don zama filastik tare da kyakkyawan aiki.

1. Gudun roba shine mafi mahimmancin bangaren robobi, kuma abinda ke cikin robobi gaba daya ya kai kashi 40% zuwa 100%.Saboda abin da ke ciki yana da girma, kuma yanayin resin sau da yawa yana ƙayyade yanayin robobi, mutane sukan ɗauki resin a matsayin ma'anar roba.Misali, rikitar da guduro na polyvinyl chloride da robobin polyvinyl chloride robobi, da resin phenolic da robobin phenolic.A gaskiya ma, resin da filastik ra'ayoyi ne daban-daban guda biyu.Resin wani ɗanyen polymer ne wanda ba a sarrafa shi ba wanda ba kawai ake amfani da shi don yin robobi ba, har ma da ɗanyen kayan shafa, manne, da zaruruwan roba.Baya ga wani ɗan ƙaramin ɓangaren robobi mai ɗauke da resin 100%, yawancin robobin suna buƙatar wasu abubuwa ban da resin babban ɓangaren.

2. Filler Filler kuma ana kiransa filler, wanda zai iya inganta ƙarfi da ƙarfin zafi na robobi da rage farashi.Alal misali, ƙari da foda na itace zuwa ga resin phenolic na iya rage farashi sosai, yin filastik phenolic daya daga cikin robobi mafi arha, yayin da kuma inganta ƙarfin inji.Za a iya raba fillers zuwa nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan za a iya raba su: na'urorin da ake sarrafa su da na'urorin da ba a sarrafa su ba, na farko kamar gari na itace, tarkace, takarda da zaruruwan masana'anta daban-daban, sannan na biyun kamar fiber gilashi, ƙasa diatomaceous, asbestos, da baƙin carbon.

3. Plasticizers Plasticizers na iya ƙara daɗaɗɗen robobi da sassauƙa na robobi, rage ɓarna, da sauƙaƙe sarrafa robobi da siffa.Plasticizers gabaɗaya manyan mahadi na halitta masu tafasa ne waɗanda ba su da kyau tare da guduro, mara guba, mara wari, kuma barga zuwa haske da zafi.Mafi yawan amfani da su shine phthalate esters.Misali, a cikin samar da robobi na polyvinyl chloride, idan an kara yawan masu yin robobi, za a iya samun robobin polyvinyl chloride mai taushi;idan babu ko žasa da aka ƙara masu filastik (adadin <10%), ana iya samun robobin polyvinyl chloride mai ƙarfi.

4. Stabilizer Don hana resin roba daga lalacewa da lalacewa ta hanyar haske da zafi yayin aiki da amfani, da kuma tsawaita rayuwar sabis, dole ne a ƙara mai daidaitawa zuwa filastik.Yawanci ana amfani da su shine stearate da resin epoxy.

5. Masu canza launi na iya yin robobi suna da launuka masu haske da kyau.Rini na halitta da aka fi amfani da su da kuma inorganic pigments azaman masu launi.

6. Man shafawa Matsayin mai mai shine don hana filastik daga mannewa da ƙarfe a lokacin gyare-gyare, kuma a lokaci guda ya sa saman filastik ya zama santsi da kyau.Abubuwan da aka saba amfani da su sun haɗa da stearic acid da calcium da gishirin magnesium.Bugu da ƙari ga abubuwan da ke sama, ana iya ƙara masu kare wuta, masu kumfa, magungunan antistatic, da dai sauransu a cikin filastik.