Polyol ndi isocyanate ratio:

Polyol ili ndi mtengo wapamwamba wa hydroxyl komanso kulemera kwakukulu kwa maselo, zomwe zimawonjezera kachulukidwe kolumikizana ndikuthandizira kukonza kachulukidwe ka thovu. Kusintha kwa index ya isocyanate, ndiko kuti, chiŵerengero cha molar cha isocyanate kuti chikhale cha haidrojeni mu polyol, chidzawonjezera kuchuluka kwa crosslinking ndikuwonjezera kachulukidwe. Nthawi zambiri, index ya isocyanate ili pakati pa 1.0-1.2.

 

Kusankha ndi mlingo wa mankhwala otulutsa thobvu:

Mtundu ndi mlingo wa thovu wothandizira mwachindunji zimakhudza mpweya kukulitsa mlingo ndi kuwira kachulukidwe pambuyo thovu, ndiyeno zimakhudza makulidwe a kutumphuka. Kuchepetsa mlingo wa thovu wothandizira amatha kuchepetsa porosity ya thovu ndikuwonjezera kachulukidwe. Mwachitsanzo, madzi, monga gwero la thovu, amamenyana ndi isocyanate kupanga mpweya woipa. Kuchulukitsa kuchuluka kwa madzi kudzachepetsa kuchuluka kwa thovu, ndipo kuchuluka kwake kowonjezera kuyenera kuyendetsedwa mosamalitsa.

 

Mtengo wa catalyst:

Chothandiziracho chiyenera kuonetsetsa kuti zomwe zimapangitsa thovu ndi gel osakaniza pochita thovu zimafika pamlingo wokhazikika, apo ayi kugwa kugwa kapena kuchepa kudzachitika. Mwa kuphatikiza kwambiri zamchere tertiary amine pawiri yomwe imakhala ndi mphamvu yothandiza kwambiri pakuchita thovu komanso kumathandizira kwambiri pakuchita kwa gel, chothandizira choyenera chodzitchinjiriza chikhoza kupezeka.

 

Kuwongolera kutentha:

Kutentha kwa nkhungu: Kuchuluka kwa khungu kumawonjezeka pamene nkhungu imachepa. Kuchulukitsa kutentha kwa nkhungu kumathandizira kuchuluka kwa zomwe zimachitika, zomwe zimapangitsa kuti pakhale mawonekedwe owundana, potero kukulitsa kachulukidwe, koma kutentha kwambiri kungayambitse zomwe zimachitika. Nthawi zambiri, kutentha kwa nkhungu kumayendetsedwa pa 40-80 ℃.

 

Kutentha kwacha:

Kulamulira kutentha ukalamba 30-60 ℃ ndi nthawi 30s-7min angapeze bwino mulingo woyenera pakati pa demoulding mphamvu ndi dzuwa kupanga mankhwala.

 

Kuwongolera kuthamanga:

Kuchulukitsa kukakamiza panthawi yotulutsa thovu kumatha kulepheretsa kukula kwa thovu, kupanga mawonekedwe a thovu kukhala ophatikizika, ndikuwonjezera kachulukidwe. Komabe, kupanikizika kwakukulu kumawonjezera zofunikira za nkhungu ndikuwonjezera mtengo.

 

Liwiro loyambitsa:

Kuwonjeza bwino liwiro loyambitsanso kungapangitse kuti zopangirazo zisakanizike molingana, kuchitapo kanthu mokwanira, ndikuthandizira kukulitsa kachulukidwe. Komabe, kuthamanga kothamanga kwambiri kumayambitsa mpweya wochuluka, zomwe zimapangitsa kuchepa kwa kachulukidwe, ndipo nthawi zambiri zimayendetsedwa pa 1000-5000 rpm.

 

Coefficient yodzaza mochulukira:

Kuchuluka kwa jekeseni wa zomwe osakaniza a kudzikonda khungu mankhwala ayenera kukhala wamkulu kuposa jekeseni kuchuluka kwa thovu kwaulere. Kutengera kapangidwe kazinthu ndi zinthu, kudzaza kokwanira nthawi zambiri kumakhala 50% -100% kusungitsa kupanikizika kwa nkhungu, komwe kumathandizira kutulutsa kotulutsa thovu pakhungu.

 

Nthawi yokhazikika pakhungu:

Pambuyo pothira thovu la polyurethane mu chitsanzo, kutalika kwa pamwamba kumapangidwira, khungu limakula. Kuwongolera koyenera kwa nthawi yokhazikika mutatha kuthira ndi njira imodzi yothanirana ndi makulidwe a khungu.