Kuwunika kwazinthu zazikulu zomwe zimakhudza mawonekedwe a spunbond nonwoven

Popanga ma spunbonded nonwovens, zinthu zosiyanasiyana zimatha kukhudza mawonekedwe azinthuzo.

Kuwunika kwazinthu zazikulu zomwe zimakhudza mawonekedwe a nsalu ndikothandiza kuwongolera momwe zinthu zimachitikira moyenera ndikupeza ma PP abwino opangidwa ndi spunbonded nonwovens abwino kuti agwirizane ndi kupezeka kwamakasitomala.

1.Polypropylene mtundu: kusungunula index ndi kulemera kwa maselo

Ma index apamwamba kwambiri a zinthu za polypropylene ndi kulemera kwa maselo, kugawa kwa maselo, isotacticity, melt index ndi phulusa.
Otsatsa a polypropylene ali kumtunda kwa unyolo wapulasitiki, akupereka zida za polypropylene pamagiredi osiyanasiyana komanso mawonekedwe.
Kupanga spunbond nonwoven, polypropylene molecular weight nthawi zambiri pa 100,000-250,000.Komabe, zatsimikiziridwa kuti kusungunula katundu kumachita bwino pamene kulemera kwa maselo kuli pafupi 120000. Kuthamanga kwakukulu kozungulira kumakhalanso kwakukulu pamlingo uwu.

Sungunulani index ndi chizindikiro chosonyeza rheological katundu wa kusungunuka.Mlozera wosungunuka wa PP particle wa spunbond nthawi zambiri umakhala pakati pa 10 ndi 50.

Zing'onozing'ono zosungunuka zosungunuka ndizo, kuwonjezereka kwa madzi kumakhala koipitsitsa, kucheperachepera kwa chiŵerengero cholembera ndi, ndi kukula kwa fiber yomwe pansi pa chikhalidwe cha kusungunuka komweku kuchokera ku spinneret, kotero kuti nonwovens amasonyeza kumverera kolimba kwa manja.
Pamene sungunula index yokulirapo, kukhuthala kwa kusungunuka kumachepa, katundu wa rheological amabwera bwino, ndipo kukana kulemba kumachepa.Pansi pa ntchito yofananayo, kuchuluka kwa zolembera kumawonjezeka.Ndi kuwonjezeka kwa digiri ya macromolecules, mphamvu yosweka ya nonwoven idzakhala bwino, ndipo kukula kwa ulusi kudzachepetsedwa, ndipo nsalu idzamva yofewa kwambiri. .

2. Kutentha kozungulira

Kuyika kwa kutentha kwa kupota kumadalira ndondomeko yosungunuka ya zipangizo ndi zofunikira za thupi la zinthu.Kukwera kwa melt index kumafuna kutentha kwakukulu kozungulira, ndi mosemphanitsa.Kutentha kozungulira kumagwirizana mwachindunji ndi kusungunuka kwa viscosity.Chifukwa cha kukhuthala kwakukulu kwa kusungunula, zimakhala zovuta kupota, zomwe zimapangitsa kuti ulusi wosweka, wowuma kapena wolimba, womwe umakhudza ubwino wa mankhwala.

Choncho, pofuna kuchepetsa mamasukidwe akayendedwe a Sungunulani ndi kusintha rheological zimatha Sungunulani, kuwonjezera kutentha ambiri anatengera.Kutentha kozungulira kumakhudza kwambiri kapangidwe kake ndi katundu wa ulusi.

Kutentha kozungulira kukakhala kokwera, mphamvu yosweka imakhala yokulirapo, kutalika kwake kumakhala kochepa, ndipo nsalu imakhala yofewa.
M'zochita, kutentha kozungulira kumakhala 220-230 ℃.

3. Mlingo wozizira

Popanga nsonga zopindika, kuziziritsa kwa ulusi kumakhudza kwambiri zinthu zakuthupi zosawoka.

Ngati CHIKWANGWANI chikazizira pang'onopang'ono, chimapeza mawonekedwe okhazikika a kristalo a monoclinic, omwe samathandizira kuti ulusi uwombere. Chifukwa chake, pakuumba, njira yowonjezera mpweya wozizira komanso kuchepetsa kutentha kwa chipinda chozungulira nthawi zambiri imagwiritsidwa ntchito kukonza kuswa mphamvu ndi kuchepetsa elongation wa spunbonded sanali nsalu nsalu.Kuonjezera apo, mtunda wozizira wa ulusi umagwirizananso kwambiri ndi katundu wake.Popanga nsalu zosalukidwa, mtunda wozizirira nthawi zambiri umakhala pakati pa 50 cm ndi 60 cm.

4. Zoyenera Kulemba

Digiri yoyang'anira unyolo wa ma molekyulu mu ulusi ndi chinthu chofunikira chomwe chimakhudza kufalikira kwa monofilament.
Kufanana ndi kusweka kwamphamvu kwa ma nonwovens oponyedwa amatha kupitilizidwa powonjezera kuchuluka kwa mpweya woyamwa.Komabe, ngati mpweya woyamwa ndi waukulu kwambiri, n'zosavuta kuthyola ulusi, ndipo kujambula kumakhala koopsa kwambiri, kuyang'ana kwa polima kumakhala kokwanira, ndipo crystallinity ya polima ndi yokwera kwambiri, yomwe ingachepetse mphamvu ndi elongation panthawi yopuma, ndikuwonjezera brittleness, zomwe zimapangitsa kuchepa kwa mphamvu ndi kutalika kwa nsalu yopanda nsalu.Zitha kuwoneka kuti mphamvu ndi kutalika kwa ma nonwovens opangidwa ndi spunbonded kumawonjezeka ndikuchepa pafupipafupi ndi kuchuluka kwa mpweya wokoka.Pakupanga kwenikweni, ndondomekoyi iyenera kusinthidwa malinga ndi zosowa ndi zochitika zenizeni kuti mupeze zinthu zapamwamba kwambiri.

5. Kutentha kozungulira kotentha

Pambuyo pa ukonde wopangidwa ndi kujambula, imakhala yotayirira ndipo iyenera kumangidwa ndi kugudubuzika kotentha.Chofunika kwambiri ndi kulamulira kutentha ndi kuthamanga.Ntchito ya kutentha ndikufewetsa ndi kusungunula ulusi.Kuchuluka kwa ulusi wofewa komanso wosakanikirana kumatsimikizira mawonekedwe a nsalu ya PP spunbond nonwoven.

Kutentha kukayamba kutsika kwambiri, mbali yaing’ono yokha ya ulusi wokhala ndi mamolekyu otsika imafewetsa ndi kusungunuka, ulusi wochepa umamangiriridwa pamodzi pansi pa kupsyinjika. elongation ndi yayikulu, ndipo nsaluyo imakhala yofewa koma yotheka kukhala fuzz;

Kutentha kotentha kumawonjezeka, kuchuluka kwa ulusi wofewa ndi kusungunuka kumawonjezeka, ukonde wa ulusi umalumikizidwa kwambiri, osati zosavuta kuzembera.Mphamvu yosweka ya nsalu yopanda nsalu imawonjezeka, ndipo elongation idakali yaikulu.Komanso, chifukwa cha kuyanjana kwakukulu pakati pa ulusi, elongation imawonjezeka pang'ono;

Kutentha kumakwera kwambiri, mphamvu za nonwovens zimayamba kuchepa, kutalika kwake kumachepanso kwambiri, mumamva kuti nsalu imakhala yolimba komanso yonyezimira, ndipo mphamvu yong'ambika imachepetsa. kutentha kumafunika kufewetsa ndi kusungunuka, kotero kutentha kozungulira kuyenera kutsika.Momwemonso, pazinthu zokhuthala, kutentha kotentha kumakhala kokwera.

6. Kuthamanga kotentha kotentha

M'njira yolumikizirana ndi kugudubuza kotentha, ntchito ya kukakamiza kwa mzere wa mphero ndikupangitsa kuti ulusi wofewa ndi wosungunuka ukhale wolumikizana kwambiri, kukulitsa mgwirizano pakati pa ulusi, ndikupangitsa kuti ulusiwo usakhale wosavuta kutsetsereka.

Pamene kuthamanga kwa mzere wotentha kumakhala kotsika kwambiri, kachulukidwe ka ulusi pa malo oponderezedwa ndi osauka, kufulumira kwa ulusi wa fiber sikukwera, ndipo kugwirizana pakati pa ulusi kumakhala koyipa.Panthawi imeneyi, dzanja kumverera kwa spunbonded sanali nsalu nsalu ndi zofewa, elongation pa yopuma ndi lalikulu, koma kuswa mphamvu ndi otsika;
M'malo mwake, pamene kuthamanga kwa mzere kuli kwakukulu, dzanja limakhala la spunbonded losalukidwa nsalu zimakhala zovuta, ndipo elongation panthawi yopuma ndi yochepa Koma mphamvu yosweka ndi yapamwamba.Kuyika kwa kutentha kwa kutentha kumakhudzana kwambiri ndi kulemera ndi makulidwe a nsalu zopanda nsalu.Kuti apange zinthu zomwe zimakwaniritsa zofunikira pakuchita, ndikofunikira kusankha kuthamanga koyenera kotentha koyenera malinga ndi zosowa.

Mwachidule, mawonekedwe akuthupi a nsalu zosalukidwa ndi zotsatira za kugwirizana kwa zinthu zambiri.Ngakhale makulidwe a nsalu yofanana, kugwiritsa ntchito nsalu zosiyanasiyana kungafunike njira zaukadaulo zosiyanasiyana.Ndichifukwa chake kukhumudwitsa kwamakasitomala kumafunsidwa kugwiritsa ntchito nsalu.Zingathandize wopereka konzani kupanga ndi cholinga chenicheni ndikupatsa makasitomala okondedwa nsalu yokhuta kwambiri yopanda nsalu.

Monga zaka 17 wopanga, Fuzhou Heng Hua New Material Co., Ltd.ali otsimikiza kupereka nsalu malinga ndi zofuna za makasitomala.Takhala tikutumiza kumayiko ndi zigawo zosiyanasiyana ndipo tatamandidwa kwambiri ndi ogwiritsa ntchito.

Takulandirani funsani ife ndikuyamba mgwirizano wautali ndi Henghua Nonwoven!