A cikin 'yan shekarun nan, foda roba mai yawa na resin, foda roba mai ƙarfi mai jure ruwa da sauran foda roba mai araha sun bayyana a kasuwa don maye gurbin emulsion na gargajiya na VAE (vinyl acetate-ethylene copolymer), wanda aka fesa shi da feshi kuma aka yi shi da foda roba mai sake amfani da shi. To menene bambanci tsakanin foda na resin da foda na latex mai sake narkewa, shin foda na resin zai iya maye gurbin foda na latex mai sake narkewa?
Yi ɗan nazari kan bambancin da ke tsakanin su biyun don yin tunani:
01. Foda mai latex mai sake wargazawa
A halin yanzu, foda mai latex mai sake fashewa da ake amfani da shi sosai a duniya sune: vinyl acetate da ethylene copolymer foda (VAC/E), ethylene, vinyl chloride da vinyl laurate ternary copolymer foda (E/VC/VL), acetic acid Vinyl ester, ethylene da higher fatty acid vinyl ester ternary copolymer foda (VAC/E/VeoVa), waɗannan foda mai latex guda uku masu sake fashewa sun mamaye kasuwa gaba ɗaya, musamman vinyl acetate da ethylene copolymer foda VAC/EE, suna kan gaba a fagen duniya kuma suna wakiltar halayen fasaha na foda mai sake fashewa. Har yanzu mafi kyawun mafita na fasaha dangane da ƙwarewar fasaha tare da polymers da aka yi amfani da su don gyaran turmi:
1. Yana ɗaya daga cikin polymers da aka fi amfani da su a duniya;
2. Kwarewar aikace-aikace a fannin gini ita ce mafi girma;
3. Zai iya cika ƙa'idodin rheological da turmi ke buƙata (wato, ƙarfin ginin da ake buƙata);
4. Resin polymer tare da wasu monomers yana da halaye na ƙarancin ƙwayoyin halitta masu canzawa (VOC) da ƙarancin iskar gas mai ban haushi;
5. Yana da halaye na juriyar UV mai kyau, juriyar zafi mai kyau da kwanciyar hankali na dogon lokaci;
6. Babban juriya ga saponification;
7. Yana da mafi girman kewayon zafin canjin gilashi (Tg);
8. Yana da cikakkiyar haɗin kai, sassauci da kuma kayan aikin injiniya;
9. Ka sami mafi tsawon lokaci a fannin samar da sinadarai na yadda ake samar da kayayyaki masu inganci da kuma gogewa wajen kiyaye daidaiton ajiya;
10. Yana da sauƙin haɗawa da sinadarin kariya (polyvinyl alcohol) tare da babban aiki.
02. Foda mai resin
Yawancin foda na roba "resin" da ake sayarwa a kasuwa yana ɗauke da sinadarin sinadarai na DBP. Za ku iya duba illolin wannan sinadari, wanda ke shafar aikin jima'i na maza. Ana tara adadi mai yawa na wannan sinadari a cikin ma'ajiyar kaya da kuma dakin gwaje-gwaje, kuma yana da wasu canje-canje. Kasuwar Beijing, wacce ta shahara da yawan "foda ta roba", yanzu tana da nau'ikan sunaye daban-daban na "foda ta roba" da aka jika a cikin sinadarai masu narkewa: foda na roba mai ƙarfi mai jure ruwa, foda na roba mai resin, da sauransu. Halaye na yau da kullun:
1. Rashin narkewar abubuwa, wasu suna jin danshi, wasu kuma suna jin kamar suna da ruwa (ya kamata ya zama abu mai ramuka kamar sepiolite) wasu kuma fari ne kuma sun ɗan bushe amma har yanzu suna da wari mara daɗi;
2. Yana da ƙamshi mai ƙarfi sosai;
3. An ƙara wasu launuka, kuma launukan da ke bayyana a yanzu fari ne, rawaya, launin toka, baƙi, ja, da sauransu.
4. Adadin ƙarin yana da ƙanƙanta sosai, kuma adadin ƙarin tan ɗaya shine kilogiram 5-12;
5. Ƙarfin farko yana da kyau abin mamaki. Simintin ba shi da ƙarfi a cikin kwana uku, kuma allon rufin zai iya yin tsatsa da mannewa;
6. An ce allon XPS ba ya buƙatar wakilin haɗin gwiwa;
Ta hanyar samfuran da aka samu zuwa yanzu, za a iya kammala da cewa resin ne mai narkewa wanda kayan da ba su da ramuka suka mamaye shi, amma mai samar da kayayyaki yana son ya guji kalmar "sarrafawa" da gangan, don haka ana kiransa "foda ta roba".
kasawa:
1. Juriyar yanayi na sinadarin narkewar ruwa babbar matsala ce. A rana, zai ƙafe cikin ɗan gajeren lokaci. Ko da ba ya cikin rana, haɗin haɗin zai ruɓe da sauri saboda ginin ramin;
2. Juriyar tsufa, sinadarai masu narkewa ba sa jure zafin jiki, kowa ya san wannan;
3. Tunda tsarin haɗin shine ya narkar da haɗin allon rufin, akasin haka, yana kuma lalata haɗin haɗin. Idan akwai matsala da wannan matsalar a matakin ƙarshe, tasirin zai yi muni;
4. Babu wani misali na amfani da shi a ƙasashen waje. Tare da ƙwarewar sinadarai ta asali a ƙasashen waje, ba zai yiwu a ƙi gano wannan kayan ba.
Foda mai latex mai sake wargazawa
1. Samfurin foda mai narkewar latex foda ne mai narkewar ruwa, wanda copolymer ne na ethylene da vinyl acetate, tare da polyvinyl barasa a matsayin colloid mai kariya.
2. Foda mai narkewar VAE na latex yana da kaddarorin samar da fim, kashi 50% na ruwan da ke cikinsa yana samar da emulsion, kuma yana samar da fim mai kama da filastik bayan an sanya shi a kan gilashin na tsawon awanni 24.
3. Fim ɗin da aka ƙera yana da ɗan sassauci da juriya ga ruwa. Zai iya kaiwa ga matsayin ƙasa.
4. Foda mai latex mai sake juyawa yana da babban aiki: yana da ƙarfin haɗuwa mai yawa, aiki na musamman da kuma kyakkyawan aikin hana ruwa shiga, ƙarfin haɗin gwiwa mai kyau, yana ba turmi juriya mai kyau ga alkali, kuma yana iya inganta mannewa da ƙarfin lanƙwasa na turmi Baya ga plasticity, juriyar lalacewa da gini, yana da ƙarfi da sassauci a turmi mai hana fashewa.
foda mai resin
1. Foda robar resin sabon nau'in gyara ne ga kayayyaki kamar roba, resin, polymer mai yawan ƙwayoyin halitta, da foda roba da aka niƙa sosai;
2. Foda robar resin tana da juriya ga lalacewa, tana da juriya ga lalacewa, tana da ƙarancin warwatsewa, wasu kuma suna jin kamar ba ta da ƙarfi (ya kamata ta zama abu mai ramuka kamar sepiolite), kuma akwai fararen foda (amma tana da ƙamshi mai kauri kamar kerosene);
3. Wasu foda na resin suna lalata allon, kuma hana ruwa shiga ba abu ne mai kyau ba.
4. Juriyar yanayi da juriyar ruwa na foda roba na resin sun yi ƙasa da na foda na latex. Juriyar yanayi babbar matsala ce. A rana, zai ƙafe cikin ɗan gajeren lokaci. Ko da ba ya cikin rana, haɗin haɗin zai yi kyau Saboda ginin rami, zai kuma ruɓe da sauri;
5. Foda robar resin ba ta da ƙarfin mold, balle sassauci. Dangane da ƙa'idodin gwaji na turmi mai hana rufin bango na waje, ƙimar lalacewar allon polystyrene kawai ta cika ƙa'idar. Sauran alamun ba su kai matsayin da aka saba ba;
6. Ana iya amfani da foda roba na resin kawai don haɗa allon polystyrene, ba don haɗa beads masu haske da allon hana wuta ba.
Lokacin Saƙo: Yuni-02-2023