Kusakaniza mutu wa zida za polyurethane elastomer: kusakaniza kusakaniza, kusakaniza mofanana.Pogwiritsa ntchito mtundu watsopano wa valavu ya jakisoni, digiri ya vacuum ndi yabwino kuwonetsetsa kuti mankhwalawa alibe thovu la macroscopic.Mtundu phala ukhoza kuwonjezeredwa.Mutu wosakaniza uli ndi wolamulira mmodzi kuti azigwira ntchito mosavuta.Kusungirako zinthu ndi kuwongolera kutentha: Tanki yamtundu wa Jacket yokhala ndi mawonekedwe owonera.Zoyezera kuthamanga kwa digito zimagwiritsidwa ntchito powongolera kukakamiza komanso mawonekedwe / kuchepa kwa ma alarm.Ma heaters otsutsa amagwiritsidwa ntchito pakuwongolera kutentha kwa gawo.Tanki ili ndi chothandizira kusakaniza zinthu mofanana.

Zida kugwiritsa ntchitozida za polyurethane elastomerkupanga:

1. Semi-rigid self-skin thovu: ntchito zipangizo zosiyanasiyana mipando, board chair armrests, passenger seat seat, pillows bathbath, bafa armrests, bathbath backrests, bafa mpando cushioni, mawilo chiwongolero galimoto, khushoni galimoto, mkati galimoto ndi kunja. Chalk, mipiringidzo mipiringidzo, mankhwala ndi opaleshoni zipangizo matiresi, headrests, olimba mipando mipando cushions, zipangizo olimba Chalk, PU matayala olimba ndi mndandanda zina;

2. Chithovu chofewa komanso chapang'onopang'ono: zoseweretsa zamtundu uliwonse zobwerera pang'onopang'ono, zakudya zopangira zobwera pang'onopang'ono, matiresi obwerera pang'onopang'ono, mapilo oyenda pang'onopang'ono, mapilo oyenda pang'onopang'ono, mapilo a ana obwerera pang'onopang'ono ndi zinthu zina;

3. thovu lofewa lolimba kwambiri: zoseweretsa ndi mphatso, mipira ya PU, ma cushioni a mipando ya PU yolimba kwambiri, njinga yamoto yolimba kwambiri ya PU, njinga, ndi ma cushion okhala pamagalimoto, zishalo za zida zamasewera zolimba kwambiri za PU, mipando yakumbuyo ya mano a PU, PU mutu wachipatala, bedi lachipatala la PU lopanga matiresi, PU high resilience boxing glove liner.

4. Magulu ofewa komanso olimba a dimba: PU flower pot mphete mndandanda, wokonda zachilengedwe matabwa chinangwa maluwa mphika mndandanda, PU kayeseleledwe maluwa ndi masamba mndandanda, PU kayeseleledwe mtengo thunthu mndandanda, etc.;

5. Kudzaza kosasunthika: magetsi adzuwa, zotenthetsera madzi, zotenthetsera zomwe zidayikidwa kale ndi mapaipi otenthetsera, mapanelo osungira ozizira, mapanelo odulira, ngolo zampunga, masangweji, zitseko zotsekera, zotsekera mufiriji, zotsekera mufiriji, zitseko zolimba za thovu ndi mazenera. , zitseko za garage, mabokosi osungira mwatsopano, mndandanda wa migolo ya insulation;

6. Zofewa komanso zolimba zotetezera zachilengedwe: zomwe zimagwiritsidwa ntchito pazinthu zomangira zosalimba komanso zamtengo wapatali ndi mndandanda wina;

7. Chithovu chamatabwa cholimba: chitseko cholimba cha thovu, mzere wokongoletsera zomangamanga, mzere wapamwamba, mbale ya denga, galasi, choyikapo nyali, shelufu yapakhoma, wokamba nkhani, zipangizo zosambira za thovu zolimba.

Zida zopangira ma polyurethane elastomers ndi magulu atatu, omwe ndi oligomer polyols, polyisocyanates ndi ma chain extenders (crosslinking agents).Komanso, nthawi zina kuti kuonjezera anachita liwiro, kusintha processing ntchito ndi ntchito mankhwala, m'pofunika kuwonjezera ena compounding wothandizira.Zomwe zimagwiritsidwa ntchito popanga zishalo za polyurethane ndizofotokozedwa mwatsatanetsatane pansipa.

Zopangidwa ndi polyurethane elastomer ndi zokongola, ndipo mawonekedwe ake okongola amadalira mitundu.Pali mitundu iwiri ya utoto, utoto wachilengedwe ndi inorganic pigment.Utoto wambiri wa organic umagwiritsidwa ntchito pazinthu za thermoplastic polyurethane, kukongoletsa ndi kukongoletsa mbali za jakisoni ndi zida zotuluka.Pali njira ziwiri zopangira utoto wa zinthu za elastomer: imodzi ndikupera zinthu zina monga pigment ndi oligomer polyols kuti apange mtundu wa phala la mowa wamtundu, kenako ndikuyambitsanso ndikusakaniza kuchuluka koyenera kwa mowa wamtundu wa phala ndi oligomer polyols mofanana. zitenthetseni.Pambuyo pakutha kwa vacuum, imakhudzidwa ndi zida za isocyanate kupanga zinthu, monga ma granules amtundu wa thermoplastic polyurethane ndi zida zopaka utoto;njira ina ndi pogaya zina monga inki ndi oligomer polyols kapena plasticizers mu mtundu phala kapena mtundu phala , madzi ndi kutentha ndi vacuum, ndi mmatumba kuti ntchito mtsogolo.Mukamagwiritsa ntchito, onjezerani phala lamtundu pang'ono mu prepolymer, gwedezani mofanana, ndiyeno muzichita ndi unyolo wowonjezera wolumikizira kuti muponyere mankhwalawa.Njira imeneyi zimagwiritsa ntchito MOCA vulcanization dongosolo, pigment zili mu mtundu phala ndi za 10% -30%, ndi Kuwonjezera kuchuluka kwa mtundu phala mu mankhwala zambiri m'munsimu 0.1%.

Diol ya polima ndi diisocyanate amapangidwa kukhala ma prepolymers, omwe amasakanikirana bwino, kubayidwa mu nkhungu pambuyo pa vacuum defoaming, kubayidwa mu nkhungu ndikuchiritsidwa, kenako kuchiritsidwa kuti apeze mankhwala:

Choyamba, dehydrate zida polyurethane elastomer pansi kuthamanga yafupika pa 130 ℃, kuwonjezera dehydrated poliyesitala yaiwisi (pa 60 ℃) mu anachita chotengera munali ophatikizana TDI-100, ndi lithe ndi prepolymer ndi yogwira mtima mokwanira.The synthesis reaction is exothermic, ndipo tisaiwale kuti kutentha anachita kuyenera kuyendetsedwa mkati mwa 75 ℃ mpaka 82 ℃, ndipo zomwe zimachitikazo zitha kuchitika kwa maola awiri.The prepolymer synthesized kenako anaikidwa mu ng'anjo vacuum kuyanika pa 75 ° C, ndi degassed pansi vacuum kwa 2 hours pamaso ntchito.

Kenako kutentha prepolymer 100 ℃, ndi vacuumize (vacuum digiri -0.095mpa) kuchotsa thovu mpweya, kulemera cholumikizira mtanda wothandizira MOCA, kutentha ndi ng'anjo yamagetsi pa 115 ℃ kusungunuka, ndi kuvala nkhungu ndi kumasulidwa koyenera. wothandizila preheat (100 ℃).), prepolymer ya degassed imasakanizidwa ndi MOCA yosungunuka, kutentha kosakanikirana ndi 100 ℃, ndipo kusakaniza kumalimbikitsidwa mofanana.Mu nkhungu preheated, pamene osakaniza si kuyenda kapena kukakamira dzanja (gel osakaniza-ngati), kutseka nkhungu ndi kuika mu vulcanizer akamaumba vulcanization (vulcanization mikhalidwe: vulcanization kutentha 120-130 ℃, vulcanization nthawi, chifukwa chachikulu. ndi Thick elastomers, nthawi vulcanization ndi yoposa 60min, kwa elastomers ang'onoang'ono ndi woonda, nthawi vulcanization ndi 20min), pambuyo vulcanization mankhwala, kuika kuumbidwa ndi vulcanized mankhwala pa 90-95 ℃ (mwapadera, kungakhale 100 ℃) Pitirizani kutenthetsa kwa maola 10 mu uvuni, ndikuyiyika kutentha kwa masiku 7-10 kuti mutsirize kukalamba ndikupanga chomaliza.