Expanded polypropylene (EPP mwachidule) ndi tinthu tating'onoting'ono tating'onoting'ono tating'ono tating'ono ta thermoplastic totengera thovu la polypropylene.Ndi yakuda, yapinki kapena yoyera, ndipo m'mimba mwake nthawi zambiri imakhala pakati pa φ2 ndi 7mm.Mikanda ya EPP imapangidwa ndi magawo awiri, olimba ndi gasi.Nthawi zambiri, gawo lolimba limangotengera 2% mpaka 10% ya kulemera konse, ndipo ena onse ndi gasi.Chiwerengero chochepa cha kachulukidwe ndi 20-200 kg / m3.Makamaka, kulemera kwa EPP ndi kopepuka kuposa kwa thovu la polyurethane pansi pa mphamvu yomweyo yotengera mphamvu.Chifukwa chake, mbali za thovu zopangidwa ndi mikanda ya EPP ndizolemera pang'ono, zimakhala ndi kutentha kwabwino, zotchingira bwino komanso zida zamakina zabwino kwambiri, ndipo zimatha kuwonongeka 100% ndikubwezerezedwanso.Ubwino wonsewu umapangitsa EPP kukhala imodzi mwazinthu zomwe zimagwiritsidwa ntchito kwambiri m'magawo ambiri, m'mbali zonse za moyo wathu:
M'munda wamagalimoto, EPP ndiye njira yabwino kwambiri yokwaniritsira zinthu zopepuka, monga ma bumpers, zipilala zamagalimoto za A-pillar, zida zamagalimoto zam'mbali, zitseko zamagalimoto, mipando yapamwamba yamagalimoto, mabokosi a zida, katundu, Armrests, zida za polypropylene zopangidwa thovu. angagwiritsidwe ntchito mbali monga pansi mbale, ma visors dzuwa, mapanelo zida, etc. Ziwerengero: Pakali pano, pafupifupi kuchuluka kwa pulasitiki ntchito magalimoto ndi 100-130kg/galimoto, amene ntchito kuchuluka kwa thovu polypropylene ndi 4-6kg. /galimoto, yomwe imatha kuchepetsa kulemera kwa magalimoto ndi 10%.
Pankhani yolongedza, zotengera zomwe zingagwiritsidwenso ntchito komanso zonyamula zopangidwa ndi EPP zimakhala ndi mawonekedwe osungira kutentha, kukana kutentha, kukana dzimbiri, kutchinjiriza, moyo wautali wautumiki, ndi zina zotere, sizikhala ndi zinthu zosasinthika, komanso zilibe chinthu chimodzi chomwe ndi zovulaza ku ozoni wosanjikiza kapena zitsulo zolemera Zakuthupi ma CD, digestible pambuyo Kutentha, 100% wochezeka chilengedwe.Kaya ndi zida zamagetsi zolondola, kapena kutumiza zakudya monga zipatso, nyama yowunda, ayisikilimu, ndi zina zotero, thovu la polypropylene lingagwiritsidwe ntchito.Malinga ndi kuyesa kwamphamvu kwa BASF, EPP imatha kukwaniritsa maulendo opitilira 100, omwe amapulumutsa kwambiri zida ndikuchepetsa mtengo wonyamula.
Kuphatikiza apo, EPP imakhala ndi kukana kugwedezeka komanso kuyamwa mphamvu, ndipo imagwiritsidwanso ntchito kwambiri popanga mipando yachitetezo cha ana, m'malo mwa pulasitiki yolimba kwambiri ndi zida za polystyrene, ndipo yakhalanso chinthu chomwe chimakondedwa pazofunikira za tsiku ndi tsiku zapakhomo.
Mpando wa ana wopangidwa ndi Karwala mogwirizana ndi KNOF Industries.Uwu ndiye mpando wachitetezo cha ana wopepuka kwambiri pamsika, wonyamula ana mumtundu wa 0-13kg komanso wolemera 2.5kg, womwe ndi 40% wotsika kuposa zomwe zili pamsika pano.
Ngakhale kusiyanasiyana kotereku, sitikuzindikira.N’chifukwa chiyani zili choncho?Chifukwa m'mbuyomu, mbali zambiri za thovu za EPP zogwiritsa ntchito nkhungu ndi ukadaulo wowumba tinthu tating'ono sizinali zokometsera ndipo nthawi zambiri zinkabisidwa kuseri kwa zinthu monga chitsulo, chitsulo, siponji, thovu, nsalu ndi zikopa.Kwa zaka zambiri, zoyesayesa zakhala zikupanga kusintha kwapamwamba kwa magawo a thovu opangidwa ndi thovu powonjezera kapangidwe ka mkati mwa zida zomangira.Tsoka ilo, izi nthawi zambiri zimabweretsa kuchuluka kwa zinyalala.Kupanga jekeseni kumatengedwa ngati njira yololera kwakanthawi, koma zopangira zake sizowoneka bwino potengera kulemera kopepuka, kuyamwa mphamvu ndi kutchinjiriza.
Pofuna kuti pamwamba pa tinthu thovu mbali bwino, mukhoza kusankha kugwiritsa ntchito laser processing teknoloji pambuyo zigawo aumbike, kapena kuchita mankhwala lamination kupeza masitaelo osiyanasiyana kapangidwe.Koma kukonzanso pambuyo kumatanthauzanso kugwiritsa ntchito mphamvu zowonjezera, zomwe zimakhudzanso kubwezeretsedwa kwa EPP.
M'nkhaniyi, T.Michel GmbH, pamodzi ndi ambiri opanga zipangizo zamakono ndi zipangizo zamakono, adayambitsa teknoloji ya "In-Mold Foamed Particle Coating" (IMPFC), yomwe ikupopera nthawi yomweyo ngati kuumba.Njirayi imagwiritsa ntchito kurtz Ersa's THERMO SELECT ndondomeko, yomwe imasintha payokha kutentha kwa nkhungu, zomwe zimapangitsa kuti pakhale gawo lapamwamba kwambiri ndi kuchepa kwambiri.Izi zikutanthauza kuti akamaumba opangidwa akhoza overmolded yomweyo.Izi zimathandizanso kupopera mbewu mankhwalawa munthawi yomweyo.Chophimba chopopera chidzasankha polima yokhala ndi mawonekedwe ofanana ndi particles thovu, mwachitsanzo, EPP imagwirizana ndi PP yopopera.Chifukwa cha kapangidwe kagawo limodzi, magawo a thovu opangidwa ndi 100% amatha kubwezeretsedwanso.
Mfuti yopopera yamafakitale yochokera ku Nordson yomwe imamwaza utotowo kukhala yunifolomu ndi madontho abwino kuti agwiritse ntchito bwino m'kati mwa nkhungu.Kukula kwakukulu kwa zokutira kumatha kufika 1.4 mm.Kugwiritsiridwa ntchito kwa chophimba kumathandizira kusankha kwaufulu kwa mtundu ndi mawonekedwe a zigawo zowumbidwa, ndipo kumapereka malo aakulu owonjezera kapena kusintha kwa ntchito ya pamwamba.Mwachitsanzo, zokutira PP angagwiritsidwe ntchito thovu EPP.Zimabweretsa zabwino ku UV.
Makulidwe a zokutira mpaka 1.4 mm.Poyerekeza ndi jekeseni, ukadaulo wa IMPFC umapanga magawo owumbidwa omwe ndi opepuka kuposa 60 peresenti.Kupyolera mu njirayi, akamaumba opangidwa ndi thovu particles kuphatikizapo EPP adzakhala ndi chiyembekezo chokulirapo.
Mwachitsanzo, zinthu zopangidwa ndi thovu la EPP sizidzabisikanso kumbuyo kwa zida zina kapena kukulunga muzinthu zina m'tsogolomu, koma zidzawonetsa chithumwa chawo poyera.Ndipo, ndi kufunikira kwa magalimoto amagetsi m'zaka zaposachedwa komanso njira yabwino yosinthira ogula kuchoka ku magalimoto achikhalidwe kupita ku magalimoto amagetsi (malinga ndi International Energy Agency, kugulitsa magalimoto amagetsi padziko lonse lapansi akuyembekezeka kufika mayunitsi 125 miliyoni mu 2030. Pofika chaka cha 2030; China ikuyembekezeka Kuzungulira 70% yazogulitsa zamagalimoto kukhala ma EVs), zomwe zidzapangitse mwayi waukulu pamsika wa EPP.Magalimoto adzakhala msika waukulu kwambiri wogwiritsa ntchito EPP.Kuphatikiza pa kuzindikira kusinthika ndi kukweza kwa zida zamagalimoto zomwe zilipo kale ndi misonkhano yawo, EPP idzagwiritsidwanso ntchito pazinthu zomwe zangopangidwa kumene, kuphatikiza, koma osati ku:
M'tsogolomu, EPP idzapitiriza kugwira ntchito yofunikira pakuwunikira zinthu, kusungunula kutentha, kuyamwa mphamvu, ndi zina zotero chifukwa cha zinthu zambiri zabwino zomwe sizingagwirizane ndi kuphatikiza kwazinthu zina: mtengo wotsika, katundu wabwino kwambiri wamakina, formability zabwino, chilengedwe ubwenzi, etc. zotsatira.
Nthawi yotumiza: Aug-05-2022