Mphamvu ya Resin Kukhazikika
PVC utomoni ndi zinthu kutentha tcheru, ndipo pali zofooka zambiri mu kapangidwe kake maselo, monga zomangira awiri, allyl magulu, yotsalira Initiator mapeto magulu, etc. Malinga ndi limagwirira ntchito ankafuna kusintha zinthu mopitirira malire, zilema izi mosavuta adamulowetsa ndi kutentha ndi kuwala kupanga ma free radicals.Pansi pa zochita za free radicals, polyvinyl chloride imalowa dehydrochlorination ndikuwonongeka molingana ndi makina amaketani.The mosalekeza dehydrochlorination reaction umapanga polyene motsatana wa conjugated awiri zomangira pa unyolo waukulu wa polyvinyl kolorayidi molekyulu, amene ndi chromogenic dongosolo.Malinga ngati chiwerengero cha conjugated zomangira wapawiri kufika 5 ~ 7, polyvinyl kolorayidi akuyamba Discoloration, pamene kuposa 10, kutembenukira chikasu, ndi conjugated ndondomeko akupitiriza kutalikitsa, ndi mtundu wa polyvinyl kolorayidi pang`onopang`ono akuzama, ndipo potsiriza amakhala bulauni kapena ngakhale wakuda.Kusunga bata la PVC pa kutentha kutentha ndi maziko a ntchito zonse toning ndi whitening.
Zotsatira za kutentha
Mbiri ya pulasitiki ya PVC imapangidwa ndi pulasitiki ndipo imapangidwa pa kutentha kwa 185 ~ 195 ° C, ndipo nthawi yotentha imakhala yaitali ngati mphindi zingapo, zomwe zimafuna utoto ndi zowunikira zomwe zimagwiritsidwa ntchito kuti zikhale ndi kutentha kwakukulu.Kwa rutile titaniyamu woipa, mawonekedwe ake a kristalo ndi kyubu, ma atomu a Ti ndi ma atomu a O amakonzedwa bwino, mawonekedwe a kristalo ndi okhazikika kwambiri, ndipo amatha kukhalabe okhazikika ndikugwira ntchito pansi pa kutentha kwa kutentha kwa mbiri ya PVC;ultramarine ndi aluminiyamu silicate.Mankhwala okhala ndi sulfure, kukana kutentha kulinso kwabwino kwambiri.Komabe, kwa othandizira oyera a fulorosenti, mitundu yosiyanasiyana ya zoyera za fulorosenti imakhalanso ndi kusiyana kwawo pakukana kutentha.
Acid zotsatira
Njira yopangira PVC nthawi zonse imatsagana ndi kuwonongeka kwa mamolekyu a PVC, ndipo kuchuluka kwa hydrogen chloride kumapangidwa panthawi ya kuwonongeka.Mpweya wa hydrogen chloride pa kutentha kwambiri ndi wowononga kwambiri komanso acidic.Pazida zitatu zomwe tafotokozazi, TiO2 imakhala ndi kukana kwa dzimbiri kwa asidi, kutsatiridwa ndi ma fluorescent whitening agents, ndipo ultramarine buluu ndi yoyipa kwambiri (pamalo a acidic, ultramarine buluu imasintha kuchokera ku buluu kupita ku yoyera ndipo imatulutsa thovu lalikulu).Chifukwa chomwe ultramarine buluu imagwiritsidwabe ntchito popanga mbiri m'malo mwa phthalocyanine buluu wokhala ndi asidi wabwino kwambiri ndi chifukwa chakuti mphamvu ya tinting ya phthalocyanine blue ndi yamphamvu kwambiri, yomwe ili pafupi 20 ~ 40 nthawi ya ultramarine blue.Kuphatikizika kwa chosakaniza, kuchuluka kwa buluu wa ultramarine pamlingo uliwonse ndi 5 ~ 20g yokha.Ngati asinthidwa ndi phthalocyanine buluu, kuchuluka kwake kumakhala kochepa kwambiri, ndipo cholakwika choyezera ndi chachikulu kwambiri, chomwe chidzapangitsa kuti magulu a mbiri awonekere.Kusintha kwakukulu kwa chromatic.
Zotsatira za adjuvants
Zida zopangira ndi ukadaulo wa mbiri yapulasitiki ya PVC m'dziko langa zimatumizidwa kuchokera ku Europe ndi United States.M’menemo muli mtovu wochuluka.Sulfure yomwe ili mu ultramarine blue imatha kuyanjana ndi lead mu stabilizer, zomwe zimapangitsa kuti mbiri yakuda ya sulfide ikhale yoipitsidwa.
Zotsatira za Brightener mlingo
Titanium dioxide ndiye maziko a toning ndikuyeraza mbiri zoyera za PVC.Pamene kuchuluka kwa titaniyamu woipa kumawonjezeka, kuyera kwa mankhwala kumawonjezeka.
Kuphatikiza apo, monga chotchinga chachikulu cha UV pakupanga zinthu zojambulidwa, mulingo wa titaniyamu woipa ulinso ndi zofunika zina.Nthawi zambiri, mlingo wa titaniyamu woipa uyenera kufika 4 ~ 8phr.
Ultramarine blue imagwiritsidwa ntchito "kuphimba chikasu" kuti akwaniritse cholinga choyera.Ngati mlingowo ndi wochepa kwambiri, kuyera kwake sikuli bwino.Ngati mlingowo ndi waukulu kwambiri, ndizosavuta kupangitsa kuti zinthu zomwe zafotokozedwazo ziwoneke zabuluu ndikupanga sulfide yochulukirapo, yomwe imakhudza gloss ya zinthu zojambulidwa.Choncho, mlingo wake nthawi zambiri umayendetsedwa kuti ukhale pafupifupi 0,5% ya mlingo wa titaniyamu woipa.
Fluorescent whitening agentsimatha kuyamwa bwino cheza cha ultraviolet cha utali winawake wa kutalika kwake ndikuitulutsa ngati kuwala kowoneka.Ndi kuwonjezeka kwa kuchuluka kwa fulorosenti whitening wothandizira, kuyera kwa mankhwala kumawonjezeka;koma pamene fulorosenti whitening wothandizira kufika ndende inayake, kupitiriza kuonjezera kuchuluka alibe zotsatira kwambiri pa kuyera kwa mbiri PVC mbiri, ndipo nthawizina amachepetsa, ndipo kuchuluka ndi lalikulu.Chikoka pa kagwiridwe ka ntchito ndi mawonekedwe akuthupi ndi makina azinthu zomwe zafotokozedwazo ziyenera kuganiziridwa.
Nthawi yotumiza: Mar-26-2022