Bukuli likufotokoza tanthauzo la chikopa cha PU kwa ogula poyerekeza magwiridwe antchito, mawonekedwe, mtengo, ndi kapangidwe. Kusankha kothandiza kumadalira katundu woyembekezeredwa, kuvala, chisamaliro, kumaliza, zosowa zotsatizana, malo amtengo, ndi momwe zinthuzo zimagwirizanirana ndi misoko, m'mphepete, zida, ndi mkati. Lembani giredi, makulidwe, mtundu, kumaliza pamwamba, kumbuyo, ndi zofunikira zoyesera mu BOM kapena tsatanetsatane wa chinthucho. Tsimikizirani mafotokozedwe a ogulitsa ndi zikalata zomwe zilipo, ma swatches ovomerezeka, ndi mayeso enieni musanapange zinthu zambiri.
Chikopa cha PU: Buku Lophunzitsira Zinthu Zamakampani
Kuti mupeze malangizo okhudzana ndi ogula, onaninso za Genuine Leather Handbag Manufacturing pamodzi ndi tsatanetsatane, umboni, ndi njira zochitira zisankho m'gawo lino.
Tanthauzo ndi Kuphatikizika kwa Zinthu Zazikulu
Chikopa cha PU , chomwe chimatchedwanso chikopa chopangidwa ndi polyurethane , ndi chinthu chopangidwa mwaluso chomwe chimapangidwa kuti chifanane ndi mawonekedwe ndi mawonekedwe a chikopa chenicheni. Chimapangidwa mwa kugwiritsa ntchito utoto wa polyurethane pa nsalu, kenako ndikuyika pamwamba kuti apange mawonekedwe a tirigu.
Zigawo Zamkati:
- Mapeto Apamwamba: Chovala chapamwamba cha PU chopyapyala, chowonekera bwino chomwe chimapereka kukana kukwawa, kukhazikika kwa utoto, komanso mawonekedwe a haptic (monga matte, glossy, ndi kukhudza kofewa).
- Chikopa cha PU: Filimu yaikulu ya polyurethane yomwe imanyamula mtundu ndi kapangidwe kake. Kapangidwe kake kamatsimikizira kusinthasintha, kukana kwa hydrolysis, ndi mphamvu ya makina.
- Nsalu Yoyambira (Substrate): Chophimba nsalu chopangidwa ndi thonje lolukidwa, polyester yolukidwa, zosakaniza zosalukidwa, kapena microfiber. Chophimbacho chimalamulira mphamvu yokoka ya nsaluyo, kukana kung'ambika, ndi khungu lake.
Kuchokera pakuwona kugula, kufotokoza kapangidwe kake ka gawo lililonse ndikofunikira kuti tikwaniritse zofunikira pakugwira ntchito komaliza.
Njira Zopangira: Kuphatikizika, Kuphimba Kosamutsa, ndi Kutulutsa
Kupanga zikopa za PU kumaphatikizapo njira ziwiri zazikulu zamafakitale, iliyonse imapanga mawonekedwe ake enieni komanso mawonekedwe ake oyenera magawo osiyanasiyana amsika.
| Njira Parameter | Kuthira Madzi (Microfiber PU) | Chophimba Chosamutsa Chouma |
|---|---|---|
| Ndondomeko Mwachidule | Utomoni wa PU wosungunuka mu DMF umapakidwa pa substrate, kenako umamizidwa mu bafa la madzi zomwe zimapangitsa kuti pakhale kulekanitsidwa kwa gawo; DMF imachotsedwa, ndikusiya kapangidwe kolumikizana kokhala ndi mabowo. | Filimu ya PU imapangidwa kale pa pepala lotulutsa ndi tinthu tomwe tikufuna, kenako imayikidwa pa nsalu pogwiritsa ntchito guluu. |
| Mawonekedwe ndi Maonekedwe a Haptics | Yofewa kwambiri, yopumira bwino, imafanana ndi chikopa cha tirigu wodzaza ndi mphuno yachilengedwe. | Kulimba kwabwino pamwamba, mitundu yosiyanasiyana ya tirigu; mpweya wochepa pokhapokha ngati wabowoledwa. |
| Zida Zamagetsi | Kupirira bwino kwambiri, mphamvu zambiri zokopa, kufalitsa bwino nthunzi ya chinyezi. | Kulimba kokwanira kwa kusinthasintha kwa ntchito wamba; mphamvu ya peel imadalira guluu. |
| Ntchito Zodziwika | Nsapato, mipando yapamwamba kwambiri, zovala zamkati zamagalimoto, magolovesi. | Zovala, matumba a mafashoni, zolembera, zomangira mabuku, mipando yotsika mtengo. |
| Kutengera Mtengo | Kugwiritsa ntchito ndalama zambiri, kupanga zinthu pang'onopang'ono, komanso mtengo wokwera wa unit. | Mtengo wotsika, kupanga mwachangu, mitundu yosiyanasiyana ya zinthu zomwe zingatheke. |
Njira yachitatu, extrusion coating/laminating , imagwiritsa ntchito thermoplastic PU melt yomwe imagwiritsidwa ntchito mwachindunji ku substrate, nthawi zambiri imagwiritsidwa ntchito pazinthu zolemera zomwe zimafuna kupaka kolimba komanso kofanana.
Katundu Wofunika Kwambiri ndi Miyezo Yoyesera
Kusankha zinthu mu B2B kumafuna kuwunika kuchuluka kwa zinthu poyerekeza ndi miyezo yapadziko lonse lapansi yovomerezeka. Pansipa pali kufotokozera kwa miyezo yofunika kwambiri ndi kufunika kwake pa zisankho zogula zinthu.
| katundu | Njira Yoyesera Chitsanzo | Kufunika kwa Wogula / Ntchito |
|---|---|---|
| Kutsutsana kwa Abrasion | ASTM D3884 (Taber), ISO 5470-2 (Martindale) | Zimakhudzana mwachindunji ndi nthawi ya moyo wa chinthu m'malo omwe amagwiritsidwa ntchito kwambiri (monga mipando, nsapato). Kuchuluka kwa nthawi yogwiritsira ntchito njinga musanachepetse thupi kapena kuwonongeka kwa malo ndikofunikira. |
| Kusinthasintha Kupirira | ASTM D6182 (Bally Flex), ISO 5402 | Chofunika kwambiri pa nsapato, matumba, ndi mipando. Zimaneneratu kuti zidzasweka ndi kugawanika pambuyo popindika mobwerezabwereza; tchulani kuti kuzungulira kudzalephera kutentha kochepa ngati kuli kofunikira. |
| Mphamvu Yomatira / Kupukuta | ISO 11644, ASTM D751 | Zimasonyeza mgwirizano pakati pa chophimba cha PU ndi nsalu yoyambira. Kusagwirana bwino kumabweretsa kuchotsedwa msanga ndi kuchotsedwa kwa nsalu panthawi yopangira kapena kugwiritsa ntchito. |
| Hydrolysis Resistance | ISO 1419 (kukalamba mofulumira), kuwonekera m'chipinda chotentha | Chofunika kwambiri m'malo okhala ndi chinyezi (monga, mkati mwa magalimoto m'malo otentha). Maunyolo a PU molecular amatha kuwonongeka; ma grade okana kwambiri ndi ofunikira kuti chitsimikizo chikhalepo. |
| Kusasunthika kwa Kuwala | ISO 105-B02 (Sikelo ya Ubweya Wabuluu) | Zimazindikira chiopsezo chozimiririka m'mawindo owonetsera kapena m'ma dashboard a magalimoto. Chiyeso cha 4 kapena kupitirira apo ndi chofala pa ntchito zamkati. |
| Kulimbitsa Misozi | ASTM D751 (Trapezoid), ISO 4674 (Kung'amba kwa Lilime) | Chofunika kwambiri pa ntchito yodula ndi kusoka molondola; mphamvu yochepa yong'amba ingayambitse kung'ambika kwa mapanelo panthawi yopangira yokha. |
Mitundu Yamalonda ndi Kugawa Msika
Chikopa cha PU chimagawidwa makamaka ndi mtundu wa substrate ndi kapangidwe ka pamwamba, zomwe zimakhudza mwachindunji magwiridwe antchito ake, momwe amamvera, ndi mtengo wake. Kuzindikira magulu awa kumathandiza ogula kugwirizanitsa zofunikira ndi zofunikira pakugwiritsa ntchito kumapeto.
Ndi gawo lapansi:
- Chikopa cha Microfiber PU: Imagwiritsa ntchito maziko a microfiber osalukidwa okhala ndi mphamvu zambiri, omwe amapereka mawonekedwe enieni ofanana ndi chikopa, mphamvu, komanso kulimba. Imayimira gawo lapamwamba kwambiri, lomwe nthawi zambiri limagwiritsidwa ntchito pa mipando yapamwamba yamagalimoto komanso zinthu zapamwamba.
- Chikopa cha PU Chosalukidwa: Imagwiritsa ntchito nsalu yosalukidwa. Yotsika mtengo komanso yofanana bwino. Imapezeka kwambiri m'masofa, mipando, ndi zinthu zaofesi.
- Chikopa cha PU Chokhala ndi Nsalu: Imagwiritsa ntchito thonje/poliyesitala yolukidwa kapena yolukidwa. Imakhala ndi chivundikiro chofewa komanso chofewa, chomwe chimagwiritsidwa ntchito kwambiri pa zovala ndi zinthu zina za mafashoni.
Ndi Kapangidwe ka Pamwamba:
- PU Yopumira/Yopumira: Yopangidwa ndi ma pores ang'onoang'ono olumikizidwa kuti ipereke nthunzi ya chinyezi, yofanana ndi mphamvu ya chikopa yochotsa thukuta. Imagwiritsidwa ntchito mu mipando yamagalimoto ndi nsapato zogwirira ntchito.
- Patent (Yowala Kwambiri) PU: Chovala chowala kwambiri chokhala ndi mawonekedwe olimba, chomwe chimagwiritsidwa ntchito mu nsapato ndi zowonjezera mafashoni.
- PU yojambulidwa: Imatsanzira zikopa zachilendo (monga ng'ona, nthiwatiwa) kapena mawonekedwe apadera pogwiritsa ntchito ma roller otentha.
- Semi-PU: Mtundu wokwera mtengo pomwe pamwamba pake pali wosanjikiza woonda wa PU, ndipo chophimba chamkati ndi PVC, zomwe zimapangitsa kuti PU ikhale yopindulitsa pang'ono.
Kusanthula Koyerekeza: PU vs. Chikopa Chenicheni, PVC, ndi Microfiber
Posankha zinthu, kufananiza koyenera ndi njira zina n'kofunika kwambiri. Tebulo ili likuwonetsa kusiyana kothandiza kuchokera pakupanga ndi kugula.
| Zotsatira | Chikopa cha PU (Chachikulu) | Chikopa Chowona | Chikopa cha PVC (Vinyl) | Chikopa cha Microfiber PU |
|---|---|---|---|---|
| Mtengo (Wachibale) | sing'anga | Wapamwamba - Wapamwamba Kwambiri | Low | High |
| Kupuma | Yotsika-Yapakati (yokwera kwambiri pamagiredi apadera) | chabwino | Yotsika Kwambiri (yopanda mabowo) | Ma micro-pores apamwamba (opangidwa ndi akatswiri) |
| Kukhalitsa / Moyo Wosinthasintha | Yapakatikati-Yapamwamba (imasiyana malinga ndi giredi) | Kwambiri Kwambiri | sing'anga | Kwambiri Kwambiri |
| Kukongola Kusasinthasintha | Zabwino kwambiri (zofanana, zozungulira-kuzungulira) | Zosauka (zipsera zachilengedwe, zipsera) | chabwino | chabwino |
| Kukaniza Kwachilengedwe | Imakhudzidwa ndi hydrolysis; kukhazikika kwa UV kumatha | Amakonda kugwidwa ndi nkhungu/chimfine; amafunika kukonzedwanso | Kusamuka kwa pulasitiki; kumauma mufiriji | Kukana kwakukulu ngati kwapangidwa |
| Kunenepa | Kuwala-Zapakatikati | lolemera | Yapakatikati-Yolemera | Kuwala-Zapakatikati |
| Zokolola Zachizolowezi (Kudula) | Mipukutu yokwera (yopanda chilema) | Zosinthika (chifukwa cha zolakwika zachilengedwe) | High | High |
Chidziwitso Chogula: Chikopa chenicheni chimapereka ukalamba wosayerekezeka koma chimafuna kudula mwaluso kuti chikhale ndi zipatso zambiri. PU imapereka kuthekera kodziwikiratu komanso kufalikira kwa zinthu zambiri; PVC ndi chisankho cha bajeti pomwe kutentha kwambiri sikofunikira; Microfiber PU imatseka kusiyana kwa magwiridwe antchito ndi chikopa chenicheni koma pamtengo wokwera.
Mfundo Zovuta Zamalonda ndi Mayankho Ogwira Ntchito
Kugwirizana ndi ogulitsa kuti athetse mavuto okhudzana ndi khalidwe ndi magwiridwe antchito omwe amabwerezedwanso kungathandize kuti kugula ndi kupanga zinthu zikhale zosavuta. Tebulo lotsatirali likuwonetsa mavuto omwe ogula zikopa za PU amakumana nawo nthawi zambiri.
| Pain Point | Choyambitsa | Njira Yothandiza |
|---|---|---|
| Kuchotsa kapena kuchotsa ming'alu m'malo omwe anthu amapanikizika kwambiri (monga nsapato zodzitetezera, zotetezera mipando) | Kusagwirana bwino pakati pa filimu ya PU ndi maziko; kugwiritsa ntchito guluu wolakwika pa substrate; kusagwirana bwino. | Tchulani mphamvu ya peel (>3 kg/cm pa ISO 11644) mu mgwirizano wogula; pemphani malipoti oyesera kumatirira kwa batch; chitani mayeso a tepi-peel pamanja pa zitsanzo zomwe zikubwera. |
| Pamwamba pomata kapena tacky pambuyo potumiza, zomwe zimapangitsa kuti mipukutu itseke kapena kusonkhanitsa fumbi | Kusamuka kwa mapulasitiki kapena ma oligomer otsika-MW kupita pamwamba, nthawi zambiri kumachitika chifukwa cha kutentha panthawi yonyamula chidebe. | Funani malo opanda kugwedezeka okhala ndi choletsa kutsekeka mu topcoat; tchulani malire a kutentha kosungira; pemphani mayeso okalamba kutentha (masiku 7 pa 70°C). |
| Kusagwirizana kwamitundu pakati pa mipukutu kapena mkati mwa mipukutu | Kusakaniza kwa utomoni wa PU kosasinthasintha; kufalikira kwa utoto kosakwanira; kusinthasintha kwa makulidwe a utoto wa pamwamba. | Khazikitsani Delta E tolerance (<1.0 CMC) ndipo funani lipoti la muyeso wa utoto; konzani ndi nambala ya batch kuti mugwire ntchito yayikulu; pemphani kuti muvomereze 2-meter strike-off musanapange bulk. |
| Kuwonongeka kwa hydrolysis (kuuma, kusweka) patatha miyezi 6-12, makamaka m'malo ozizira | PU yokhazikika yochokera ku polyester imakhudzidwa ndi chinyezi; palibe zolimbitsa madzi zomwe zimagwiritsidwa ntchito. | Tchulani PU yochokera ku polyether kapena carbonate yochokera ku PU yogwiritsidwa ntchito m'madera omwe ali ndi chinyezi chambiri; muyenera kuyesa kukana hydrolysis (monga, masabata atatu pa 70°C ndi 95% RH, kusunga >60% ya mphamvu yoyambira yogwira). |
| Fungo lamphamvu la zosungunulira pa katundu wolandiridwa, kusonyeza kuti DMF yachotsedwa mokwanira | Kusambitsa kosakwanira panthawi yonyowa; kuchepetsa nthawi yowuma mu uvuni. | Tchulani kuchuluka kwa DMF yotsalira (<50 ppm) ndipo pemphani lipoti la gas chromatography; yesani kununkhiza pa mipukutu yatsopano; onani momwe wogulitsayo amasambitsira madzi otayira komanso momwe amasambitsira. |
| Kulephera kupukuta ndi kusoka, zomwe zimayambitsa kudula kwa singano panthawi yosoka yokha | Nsalu yofooka pansi; mtunda wokulirapo wa singano; kupsinjika kwa ulusi kumakhala kwakukulu kwambiri kuposa nsaluyo. | Tchulani njira yochepetsera kung'ambika kwa soketi (monga 25 N) yoyenera kupangira msoko; langizani mayeso okonzekera kusoka musanasoke; gwiritsani ntchito singano zozungulira zomwe zapangidwira zinthu zopangidwa ndi opanga. |
Ntchito Zamakampani ndi Kusankha Koyendetsedwa ndi Magwiridwe Antchito
Kusinthasintha kwa chikopa cha PU kukuwonetsedwa kudzera mu mafotokozedwe a madera osiyanasiyana. Zotsatirazi zikugwirizana ndi magulu ofanana azinthu zomwe zili ndi magwiridwe antchito ofunikira kwambiri pogula.
- Nsapato: Chofunika kwambiri pa flex resistance (Bally Flex >100,000 ma cycles ouma), kusokoneza abrasion za zipewa za zala, ndi kukana kwa hydrolysis Kumisika ya m'madera otentha. Kukhuthala kwake nthawi zambiri kumakhala 1.0 - 1.4 mm.
- Zam'kati Zamagalimoto: Zofuna kuchepa kwa VOC, Kukhazikika kwa UV (Sikelo Yabuluu >6), kukana kwambiri kwa hydrolysis, komanso yofewa komanso yosalala. Nthawi zambiri imagwiritsa ntchito zinthu zopangidwa ndi ulusi wa microfiber zokhala ndi kapangidwe kamphamvu kwambiri.
- Upholstery (Mgwirizano/Nyumba Zogona): Zofunika kuthamanga kwambiri (Martindale >50,000 cycles), kukana ndi kuyeretsa kosavuta, komanso kuchedwa kwa moto (monga, BS 5852, CAL TB 117). Kuyika kwa zigawo kuyenera kuthandizira kukanikizana kosalekeza.
- Zipangizo ndi Matumba a Mafashoni: Kusankha kwa zoyendetsa zokongola: zotsatira za pamwamba (wosawoneka bwino, patent, wachitsulo), kuya kwa mtundu, kuthekera kosunga zinthu zovuta zokongoletsa. Kapangidwe kake komaliza m'mphepete ndi misozi mphamvu pakuti zokongoletsa zopyapyala ndizofunikira kwambiri.
- Zovala: Balance ya kuyika, kumva dzanja lofewa, kupuma (zokhala ndi ma microporous), ndi colorfastness kuchapaNsalu zolukidwa kumbuyo ndizofala.
Mawu Ofunika Kwambiri ndi Kulankhulana Mogwira Mtima kwa Ogulitsa
Kupereka ndi kupeza zinthu molondola kumadalira chilankhulo cholondola. Pansipa pali tanthauzo la mawu aukadaulo omwe amagwiritsidwa ntchito pochita malonda a chikopa cha PU.
- Yang'anani: Mbali yakunja, yomalizidwa ya zinthuzo.
- Mbali Yobwerera / Yakumbuyo: Mbali ya nsalu yoyambira, yomwe ingakhale yosakonzedwa, yokutidwa, kapena yopakidwa ndi nsalu yakumbuyo.
- Kujambula: Njira yoperekera chikopa kapena chitsanzo pamwamba pa PU pogwiritsa ntchito kutentha ndi kukakamiza pogwiritsa ntchito chozungulira kapena mbale yokhala ndi mapatani.
- Kugwedeza: Kusamutsa mtundu kuchokera pamwamba pa chinthucho kupita pamwamba pa china mwa kukanda. Kuyesedwa pogwiritsa ntchito mayeso ouma komanso onyowa a crockfastness (ISO 105-X12).
- Kukula kwa Zokolola / Kudula: Kukula kogwiritsidwa ntchito kwa mpukutuwo kupatulapo selvedge. Kupereka zokolola zochepa zotsimikizika kumachepetsa zinyalala m'mapangidwe a zisa.
- Nambala ya Gulu / Loti: Khodi yofunikira yotsatirira. Zitsanzo zonse zisanapangidwe komanso zotumizidwa zambiri ziyenera kutchula nambala iyi kuti zitsimikizire kukhazikika.
- Kuyimitsa: Chitsanzo chaching'ono cha kupanga chomwe cholinga chake ndi kuyimira mtundu ndi kapangidwe kake ka zinthu zomwe zagwiritsidwa ntchito pomaliza. Kuvomereza kuchotsedwa kwa chinthu ndi gawo lofunika kwambiri pasadakhale kupanga.
Mafunso Ofunsidwa Kawirikawiri (B2B Procurement Perspective)
Kodi ndingasiyanitse bwanji chikopa cha PU chapamwamba kwambiri ndi mitundu ina ya chikopa chapamwamba?
Chikopa cha PU chapamwamba kwambiri chimakhala ndi mawonekedwe ofanana ndi pamwamba pake, ma pores ofanana, komanso mawonekedwe ofewa, osalala popanda kukhudza komata kapena kofanana ndi pulasitiki. Yesani kumamatira mwa kukanikiza mwamphamvu ndikupotoza tepi yomatira pamwamba; kusamutsa kochepa kapena kopanda kuphimba kumasonyeza kulumikizana kwamphamvu. Yang'anani nsalu yakumbuyo: mitundu yapamwamba imagwiritsa ntchito microfiber yolimba, yokhala ndi ulusi wambiri kapena maziko osalukidwa, pomwe mitundu yotsika imakhala ndi mbali yotayirira, yolimba. Komanso, funsani za kukana kwa abrasion (Martindale cycles) ndi kukana kwa hydrolysis kuchokera kwa wogulitsa.
Ndi mayeso otani ofunika omwe ndiyenera kupempha kuchokera kwa ogulitsa zikopa za PU kuti nditsimikizire mtundu wake?
Mayeso ofunikira akuphatikizapo: Kukwapula kwa Taber kapena Martindale (ASTM D3884/D4966) pa kuwonongeka kwa pamwamba; kupirira kofewa (ASTM D6182) kuti muwone kusweka pambuyo popindika mobwerezabwereza; mphamvu yomatira (ISO 11644) kuti muwone mgwirizano wa chophimba; kulimba kwa utoto ku kuwala (ISO 105-B02) ndi kupukuta (ISO 105-X12); ndi kukana kwa hydrolysis (monga, 70°C, 95% RH kwa masabata 5-7). Pakugwiritsa ntchito magalimoto kapena panja, pemphaninso kuti QUV ifulumizitse nyengo komanso kukana kuzizira. Nthawi zonse tchulani miyezo yoyesera ndipo mufunikire lipoti lapadera la labu la chipani chachitatu mu mgwirizano wanu wogula.
Kodi kusankha nsalu yoyambira kumakhudza bwanji magwiridwe antchito a chikopa cha PU komanso mtengo wake?
Nsalu yoyambira ndi yofunika kwambiri: thonje lolukidwa limapereka mphamvu yokoka komanso kuluka bwino koma limatha kuchepetsa ndikuyamwa chinyezi, zomwe nthawi zambiri zimagwiritsidwa ntchito pazovala; nsalu zolukidwa zimapereka kutambasula bwino komanso kufewa kwabwino kwambiri pa upholstery; zosakaniza zosalukidwa ndizotsika mtengo komanso zofanana koma zimatha kukhala zofooka; nsalu zosalukidwa za microfiber zimapereka kukhuthala kwakukulu, mphamvu, komanso mawonekedwe ofanana ndi chikopa, zomwe zimawonjezera mtengo kwambiri. Pa ntchito zaukadaulo, funsani kulemera kwa nsalu (gsm), mphamvu yokoka/kung'amba, ndi mawonekedwe okhazikika.
Kodi ndi zolakwika ziti zomwe zimapezeka kawirikawiri m'ma PU leather rolls panthawi yowunikira?
Zolakwika zomwe zimachitika nthawi zambiri zimaphatikizapo: makulidwe osafanana a kupaka omwe amachititsa kuti mthunzi usinthe, mabowo kapena mabowo pamwamba, kusagwira bwino ntchito komwe kumayambitsa kutsekeka kwa makwinya, mizere yamitundu chifukwa chosasakanikirana bwino, chifunga kapena kuuma chifukwa cha kusamuka kwa pulasitiki, komanso kugawa khungu la pamwamba kuchokera pansi. Kuyang'ana mkati kuyenera kuyang'ana izi pansi pa kuwala kokhazikika (D65) ndikuphatikiza 100% view check kapena AQL sampling plan yogwirizana malinga ndi ISO 2859-1.
Kodi ndingatchule bwanji makulidwe ndi kumbuyo kwa chikopa cha PU kuti ndipewe mavuto opanga?
Nthawi zonse tchulani makulidwe onse molingana ndi kulekerera (monga 1.2 mm ± 0.1 mm), ndipo fotokozani padera makulidwe a khungu lophimba poyerekeza ndi makulidwe a nsalu yoyambira ngati magwiridwe antchito ndi ofunikira kwambiri. Kuti mudule bwino, chogwirira cholimba chosalukidwa kapena cha microfiber chimakondedwa kuposa zoluka zomasuka. Pa kusoka, pemphani mphamvu yodulidwa (osachepera 25 N pa ASTM D751 iliyonse). Mu nsapato kapena matumba, onetsetsani kuti filimu ya PU ili ndi mphamvu yokwanira yopindika (>50,000 cycles popanda ming'alu) kuti mupewe kulephera msanga panthawi yogwira ntchito kapena yogwiritsidwa ntchito.
N’chifukwa chiyani chikopa changa cha PU chimayamba kukhala chomata pamwamba pakapita nthawi?
Kukhazikika kwa pamwamba nthawi zambiri kumachitika chifukwa cha kusamuka kwa pulasitiki kuchokera ku PU layer kupita pamwamba, komwe kumafulumizitsidwa ndi kutentha ndi kusungidwa m'matumba apulasitiki otsekedwa. Kuti mupewe izi, tchulani PU topcoat yosasuntha, yokhala ndi aliphatic ndipo pemphani kuti muyesedwe msanga kuchokera kwa ogulitsa anu (monga masiku 7 pa 70°C). Mukasunga ndi kunyamula, onetsetsani kuti mpweya wabwino ukuyenda bwino ndipo pewani kuwala kwa dzuwa mwachindunji kapena zotengera zotentha kwambiri. Pazinthu zomwe zilipo, kuyeretsa pang'ono ndi yankho lofatsa la isopropyl alcohol kungathandize kuthetsa vutoli kwakanthawi, koma kusintha njira yopangira ndiko njira yokhazikika.
Kodi ndingagwiritse ntchito zomwezo za chikopa cha PU pa ntchito zamkati ndi zakunja?
Ayi, chikopa cha PU chamkati chimawonongeka mwachangu panja. Kugwiritsa ntchito panja kumafuna ma topcoat okhazikika a UV omwe ali ndi utoto wolimba kwambiri (Blue Scale 7-8) ndi polyether kapena polycarbonate PU base yokhala ndi kukana kwa hydrolysis. Kuphatikiza apo, mankhwala opha bowa amalimbikitsidwa m'malo okhala ndi chinyezi. Nthawi zonse funsani lipoti la woperekayo la nyengo yofulumira (monga, maola 500 a QUV) ndikutsimikizira mfundo za chitsimikizo chogwiritsa ntchito panja musanagule.
Kuti mupeze zina zokhudzana ndi ntchito yopangira, onaninso kupanga matumba achikopa apadera ; tsimikizirani zomwe zikuchitika panopa, mtengo wake, dongosolo la chitsanzo, zofunikira paubwino, ndi mgwirizano wa polojekitiyi.
