Momwe Silicone Adhesive Tg Imakhudzira Kuchita Kwa Tepi ya PTFE Pakutentha Kochepa

Kodi munayesapo kugwiritsa ntchito tepi wamba mufiriji? Amasanduka owuma, amasiya kukakamira, ndipo amang'aluka akapindika. Za Tepi ya PTFE yotentha kwambiri yomwe imagwiritsidwa ntchito m'malo otsika - kuchokera kusungirako kuzizira kupita ku mapaipi a cryogenic - kutentha kwa galasi la zomatira (Tg) kumapangitsa kusiyana konse.

Zomatira zotha kumva kupsinjika kwa silicone zimakhala ndi Tg yotsika kwambiri pafupifupi -120°C . Ichi ndi chifukwa chobisika chifukwa PTFE tepi amakhalabe kusinthasintha ndi zomatira pa kutentha otsika monga -70°C.

Aokai PTFE yaphunzira zambiri za malowa. Nkhaniyi ikufotokoza za sayansi kumbuyo kwa Tg komanso momwe imakhudzira magwiridwe antchito a tepi pakazizira.

Kodi Glass Transition Temperature (Tg) Ndi Chiyani Ndipo Chifukwa Chiyani Ili Yofunika?

Kutentha kwa magalasi (Tg) ndi pamene polima amasintha kuchoka ku malo ofewa, opangidwa ndi mphira kukhala olimba, magalasi osasunthika . Kutentha kumatsika pansi pa Tg, unyolo wa ma polima a cell amaundana, kutaya madzimadzi komanso zomatira.

Kwa zomatira zomwe zimakhudzidwa ndi kuthamanga:

• Pamwamba pa Tg: Unyolo umayenda momasuka → zomatira zimakhala zofewa, zomata, ndipo zimatha kunyowa

• Pansi pa Tg: Unyolo umaundana

Chifukwa chiyani silikoni PSA ndi yapadera: Tg yake ya -120 ° C ndi yotsika kwambiri poyerekeza ndi zomatira za acrylic (Tg kuzungulira -20 ° C mpaka -30 ° C). Izi zikutanthauza kuti silikoni imakhalabe yotanuka komanso yomamatira pa kutentha kwakukulu - kuchokera -70 ° C mpaka 260 ° C.

Ubale pakati pa Tg ndi ntchito yomatira siwosavuta kuyimitsa / kuyimitsa. Ngakhale 30 ° C pamwamba pa Tg, kuyenda kwa maselo kumakhalabe kochepa; zomatira zitha kukhala 'zachikopa' osati zomatira. Kwa PTFE tepi ntchito pansi -50 ° C, zomatira ayenera kusunga 'rubbery plateau' modulus pakati 10⁴ ndi 10⁶ Pa. Silicone PSA amakwaniritsa izi mpaka pafupifupi -80 °C chifukwa flexible siloxane msana (–Si–O–Si–). Zomatira za Acrylic, zokhala ndi misana yolimba ya carbon-carbon, nthawi zambiri imataya kutsika pansi -30 ° C. Izi zikufotokozera chifukwa chake matepi a PTFE opangidwa ndi silicone okha ndi omwe amalimbikitsidwa kuti azigwiritsidwa ntchito mufiriji (-30 ° C mpaka 0 ° C) kapena malo okhala ndi cryogenic.

Microscopic Influence Mechanism of Tg pa PTFE Tape

Kutentha kwapang'onopang'ono kwa tepi ya PTFE yotentha kwambiri kumatsimikiziridwa pamodzi ndi zomatira ndi gawo lapansi la PTFE . PTFE palokha ilinso ndi Tg pafupifupi -120 ° C - yofanana kwambiri ndi silikoni PSA.

Chidziwitso chofunikira: Malingana ngati kutentha kwautumiki kumakhalabe pamwamba pa Tg (mwachitsanzo, -70 ° C, yomwe ili 50 ° C pamwamba -120 ° C), zomatira ndi gawo lapansi zimakhalabe zotanuka kwambiri, zomwe zimatsimikizira kusinthasintha kwakukulu kwa kutentha ndi kukhazikika kokhazikika.

Labu yowunikira matenthedwe a Aokai PTFE yatsimikizira kuti silikoni PSA imasunga kupitirira 80% ya mphamvu yake yotentha yachipinda pa -70 ° C, pomwe acrylic PSA imataya kuposa 90% pansi -30 ° C. Deta iyi ikugwirizana ndi kusiyana kwa Tg.

Mu ntchito yeniyeni cryogenic (mwachitsanzo, chigoba tepi kwa otsika kutentha plasma kupopera mbewu mankhwalawa kapena kusakhalitsa fixation mu madzi asafe nayitrogeni dewars), owerenga nthawi zambiri molakwika amadzudzula PTFE filimu akulimbana pamene wolakwa weniweni ndi zomatira. Zomatira zikaundana pansi pa Tg, zimasiya kutsata ndipo sizitha kuyamwa kupsinjika kopindika. Kupsyinjika kumasamutsidwa ku gawo lapansi la PTFE, lomwe lingakhale losinthika, koma zomata zowuma zimakhala ngati zosokoneza maganizo, zomwe zimayambitsa ming'alu pa mawonekedwe a zomatira-gawo lapansi. Njira yothetsera vutoli sikugwiritsa ntchito filimu yowonjezereka ya PTFE, koma kuonetsetsa kuti zomatira zimakhala pamwamba pa Tg yake. Pazovuta kwambiri za cryogenic pansi -150 ° C, ngakhale silikoni PSA imakhala yochepa. Zikatero, kumangirira kwamakina (zotsekera, zomangira) kapena matepi a PTFE opanda zomatira akulimbikitsidwa, chifukwa palibe PSA yomwe imagwira ntchito pansi -180 ° C.

Impact pa Low-Temperature Adhesion and Flexibility

1. Kumamatira pa Kutentha Kosiyana

2. Kutentha Kwambiri Kusinthasintha

The ultra-low Tg (-120 ° C) imathandizira zomatira kuti zisunge kusungunuka ndi kufewa ngakhale pa -70 ° C, kuteteza bwino kusweka kwa brittle. Tepiyo imatha kupindika, kukulungidwa, ndi kuvulala momasuka popanda kusweka kwa brittle - mosiyana ndi matepi wamba omatira omwe amasweka m'malo ozizira.

Chidule & Malangizo Ogwiritsa Ntchito

Kutentha kwa magalasi otsika a silicone PSA kumapangitsa tepi ya PTFE yotentha kwambiri kuti ikhale ndi kukhuthala kokhazikika komanso kusinthasintha pansi pa kutentha kochepa.

Kalozera wosankha potengera kutentha:

Zosungirako & Kagwiritsidwe:

• Sungani tepi mu hermetically m'malo ozizira, owuma malinga ndi luso

• Pogwiritsa ntchito kutentha pang'ono (mwachitsanzo, kugwiritsa ntchito tepi kumalo ozizira), tenthetsani tepiyo ndi malo omangirira kuti muyambe kumamatira koyamba.

• Pewani kuyika tepi pansi pa 0 ° C osawotha - ngakhale silikoni PSA imafunikira kulumikizana koyamba pamwamba pa Tg kuti munyowetse bwino.

Mwachidule , kutentha kwa magalasi otsika kwambiri (-120 ° C) kwa zomatira zomata za silikoni ndizomwe zimapangitsa tepi ya PTFE yotentha kwambiri kuti ikhale yoyenera kumadera ozizira komanso okhala ndi cryogenic. Ngakhale matepi a acrylic amalephera pansi -30 ° C, tepi ya PTFE yochokera ku silikoni imakhala yosinthika komanso yomamata mpaka -70 ° C - ndipo imatha kupulumuka kutentha kwapansi kwambiri ndi kumamatira kochepa.

Pazinthu zambiri zozizira m'mafakitale (zozizira, zida zoziziritsa kuzizira, kuyika panja m'nyengo yozizira), tepi yokhazikika ya PTFE yokhala ndi silikoni PSA imagwira ntchito modalirika. Kuti mugwire ntchito yozama kwambiri, funsani katswiri - ndipo ganizirani kukonza makina pansi -150 ° C.

Mukufuna tepi ya PTFE kuti mugwiritse ntchito kutentha pang'ono? Aokai PTFE imapereka magiredi okhazikika komanso osinthidwa m'malo ozizira osiyanasiyana. Lumikizanani ndi gulu lathu laukadaulo ndi kuchuluka kwa kutentha kwanu ndi kayendedwe kantchito.

Yoperekedwa ndi Jiangsu Aokai New Materials Technology Co., Ltd.

Kuti mumve zambiri, mawonekedwe ogwiritsira ntchito, ndi mayankho makonda azinthu zonse kuphatikiza nsalu ya PTFE yotentha kwambiri, tepi yotentha ya PTFE, lamba wa mesh wa PTFE, lamba wosakanikirana, mbali imodzi ya nsalu ya PTFE, lamba wonyamula kutentha kwambiri komanso nsalu ya fiberglass , chonde titumizireni:

• Bambo Guo: +86 18944819998

• Bambo Liu: + 86 13705266308

Timatsatira ukatswiri ndi umphumphu, odzipereka kupereka mayankho amodzi ndi ntchito zoganizira.