Polypropylene ira whakakoero: āhuatanga me ngā āhuatanga

Polypropylene Ko te waerau rewarau o rua pōwaro. rite tenei i rite ki te hangarau o te polymerization o propylene te whakamahi i kaiwhakakökï o whakarewa. Hei whiwhi i tēnei tawhā rauemi rite ki te hunga i ai te hua polyethylene kiato tiketike.

I runga anō i te aha te huru o te whakakōkī whakamahia, he taea ki te whiwhi i tetahi momo o te waerau ranunga ranei ona. Ko te ira whakakoero o polypropylene - ko tetahi o nga āhuatanga nui o tenei rauemi. He te ahua o te paura ma granules ranei, te kiato nuinga ke o nei ki te 0, 5 g / cm³. kia kia tae te rauemi whakaahuatia, uncolored ähuareka ranei.

Whakatakotoranga: hanganga rāpoi

Hoki polypropylene kua wehea te hanganga rāpoi ki te maha momo, i roto ia ratou:

• isotactic;
• ataxic;
• syndiotactic.

Stereoisomers rauemi rerekē i roto i ngā āhuatanga ā-tinana, hangarau me te matū. Hei tauira, polypropylene atactic kua te ahua o te rauemi rapa-rite, i te mea huru o te fluidity tiketike. Ko te ira whakakoero o polypropylene mō Tangohanga i roto i tenei take, ko te pā ana ki 80 ° C, i taea te kiato tae te taumata o 850 kg / m³.

Ko te Etera diethyl memeha rawa pai te rauemi. Na roto i te āhuatanga polypropylene isotactic rerekē i te he uara tawhiti teitei i runga ake-whakaahuatia me he o elasticity, tae tona kiato 910 kg / m³, i te pāmahana rewa pae i 165 ki te 170 ° C. I roto i tenei ahua o te polypropylene āhuatanga e ātete pai ki ngā matū.

ngā āhuatanga ōkiko me te hangarau e

I teie mahana, ko reira tino noa ki te whakamahi i polypropylene. Ko rerekē i te momo takitahi te ira whakakoero o tenei rauemi. Tino maha, kua rite reira ki polyethylene, engari e kore e he polypropylene kiato rite tiketike, ko reira 0,91 g / cm³. Ano, he uaua me ātete ki te abrasion polypropylene, a ka he ātete ki pāmahana.

Taumata tīmata fakamolū reira i a tawhio noa 140 ° C, te mea te pāmahana rewa tae 175 ° C. e kore te waikura papatanga o te rauemi kitea. Ko reira kainga ki te hāora, me te marama, Heoi, heke tenei tūtohutanga e ki ka tapiritia nga stabilizers kai i roto i te hanga o te polypropylene.

I roto i ngā wāhi rerekē o te ahumahi whakamahi maha ngā momo o te polypropylene tenei ra. Ko te ira whakakoero o tenei rauemi whakawhānui rohe o tono. Ka taea te rerekē elongation i te whati i roto i te ōrau i 200 ki te 800%. Tukua kaha i roto i te mānukanuka rite ki te rohe o 250 ki te 350 kgf / cm². Pānga kaha ki kakari awhe i 33 ki te 80 kgf · cm / cm², te mea te pakeke Brinell ko waenganui i 6 me 6.5 kgf / mm².

Ko te āhuatanga matū matua

Ki te whakamahere koe ki te hoko i etahi hua i polypropylene, te ira whakakoero o te rauemi, me mohiotia koe. Mō ia e kōrero i roto i te tuhinga. Mai i reira ka taea e koe te ako me te tahi atu āhuatanga matū. Hei tauira, he matū pūmau i roto i ngā whakarewa organic te rauemi, me te paku anake putapu reira. Ki te ara te pāmahana ki te 100 ° C, rewa te rauemi waiwaro kakara. I roto i tenei take ko reira he pātai o toluene me benzene.

Hoki te take e kei te polypropylene ngā ngota waro wānanga, he reira ātete ki te hāora i raro i te mana o te radiation hihi katinga me pāmahana teitei. ai tenei he hehema ki toulekeleká rite whakaritea ki polyethylene. I raro i te mana o ngā taiao pukuriri kore he polypropylene rite pakeke rite polyethylene, e waiho i raro ki te hangai. Ko te taea ki te mamae whakamātautau mō te hangai noa i raro i te ahotea ia.

Ko te ira whakakoero o putorino polypropylene

Tino maha, te moni kiritaki polypropylene rewa pāmahana hou. Kei te āwangawanga Paipa, ki te whakamahere koe ki te kawe i roto i te whakapai ake o te pūnaha whakawera. A, no te kitea ki pāmahana o 140 ° C, riro ngohengohe te rauemi, me te kupu ngaro reira tona āhua. Notemea ki te whakaarahia te pāmahana ki te taumata o 170 ° C, puta te taahiraa rewa. I te wa ano e mutu te reira ki te waiho i te totoka, me te ngaro i te kaha ki te pupuri i tona āhua me ngā.

e kore te pūnaha whakawera i roto i te taua taumata pāmahana tatau, na te pūnaha supply wai i roto i ngongo polypropylene e tika ana. Tikanga, titau kaihanga e te taea pāmahana mōrahi o putorino polypropylene ko 95 ° C. Products taea te tu i te taumata pāmahana teitei, engari poto. Ki te roa te whakamahi o te putorino i te pāmahana nui ake i te 100 ° C, ka iti ta ratou ora mahi.

A, no te makaka te pāmahana ka rerekē polypropylene i roto i te rahi. A, no te hana, ka whakawhānui i te reira, a ki runga ki te meangiti - holomui. I raro i te mana o putorino pāmahana tiketike tīmata ai ki te Tawharuwharu i waenganui i te Here me i roto i te paparanga o waho, ka kite koe ngawhatanga.

Onäianei whakamahi korere polypropylene

kia hoki te rapu te whakamahi i roto i ngā tuhinga o te polypropylene. kia rerekē te ira whakakoero o taua paipa. kia whakaaro ki te te hua koutou ki te aroaro o PN20 waitohu tenei. I roto i tenei take ko reira he putorino, te pāmahana mahi o nei ko 60 ° C. Otira ka tae mai te reira ki te hua PN25, tohu te reira e ka waiho reira taea ki te te tu pāmahana ki runga ki te 95 ° C.

mutunga

Ki te pai he haumaru ki te mea e te paowa hiri polypropylene haamanahia e tata ana te maina. Ko te ira whakakoero o te polypropylene, Heoi, e kore e tohu e kore kia tiakina te putorino. tūtohu tohunga hoko whakapakaritia hua, e te hunga iti i haria ki te deformation i pāmahana teitei. Na reira, kia kiriweti, ka tiakina ato'a i te paparanga roto o te konumohe kaka kōata ranei putorino. tiaki tenei te putorino i te hōrapatanga, roa ratou ora mahi.