Ọ dị mma, ka anyị kọwaa n'ụzọ zuru ezu ụkpụrụ nke mgbanwe elastomer iji melite ike nkespunbond nonwoven akwa. Nke a bụ ihe atụ nke inweta ọrụ dị elu site na "ịbawanye ike na ibelata adịghị ike" site na ngwakọta ihe.
Isi echiche: Isi ike vs. Brittleness
Nke mbụ, ka anyị ghọta “ihe siri ike.” Isi ike bụ ikike nke ihe nwere ike ịmịnye ike na ime nrụrụ rọba ruo mgbe ọ gbajiri n'okpuru nrụgide. Ihe na-esi ike nke ọma dị ike ma dị ike, na-achọ nnukwu ọrụ iji gbajie.
Ihe na-emebi emebi (dị ka polypropylene na-agbanweghị): N'okpuru ike mpụga, agbụ molekụla enweghị oge iji megharia, nrụgide na-etinye uche na ntụpọ, na-eduga ozugbo na mgbaji ngwa ngwa na elongation dị ala na nkwụsịtụ.
Ihe siri ike: N'okpuru ike dị n'èzí, ha nwere ike ịmịpụta ma na-eme mgbanwe plastik, na-eri ike dị ukwuu na usoro ahụ, si otú a na-eguzogide mgbawa.
Ebumnuche bụ isi nke mgbanwe elastomer bụ ịgbanwe polymers semi-crystalline dị ka polypropylene site na omume mgbaji na-agbaji agbaji gaa na omume mgbaji ductile.
Ụkpụrụ zuru ezu nke mgbanwe Elastomer
Enwere ike ịghọta ụkpụrụ ahụ site na ma microscopic na ọkwa macroscopic. Isi ihe dị na irighiri elastomer na-arụ ọrụ dị ka ihe mgbakasị ahụ na ihe na-etinye ume.
1. Nrụpụta ihe nrụnye microscopic: Mbubata na nkwụsị nke ịka ahụ, nkwalite nke mpụta shear
Nke a bụ ụkpụrụ kachasị mkpa. Mgbe etinyere akwa spunbond n'okpuru ike mpụga (dịka ịdọka ma ọ bụ mmetụta), usoro ndị a na-eme n'ime:
a) Ntụkwasị obi na mgbakasị ahụ
Elastomers (dị ka EPDM, POE) na-adakọkarị ma ọ bụ na-adaba n'otu akụkụ na polypropylene matrix. Ya mere, mgbe agwakọtachara, a na-ekesa ha dị ka obere ihe owuwu "agwaetiti" gbasasịrị n'ime oge "oké osimiri" polypropylene na-aga n'ihu.
Ebe ọ bụ na modul nke elastomer dị nnọọ ala karịa nke polypropylene, nnukwu mgbakasị ahụ na-eme na interface n'etiti akụkụ abụọ ahụ mgbe a na-etinye ya na ike mpụga.
Isi ihe mgbakasị ahụ ndị a na-aghọ ihe mmalite maka ịka ara. Crazing abụghị mgbawa, kama ọ bụ ihe nhazi ngwugwu eriri microporous na-adabere na ntụzịaka nrụgide, nke eriri polymer ka jikọtara ya n'ime ya. Nhazi nke crazing na-enweta ike dị ukwuu.
b) Nkwụsị na-akpachapụ anya na nhazi nke Shear Band Formation
Ọrụ dị mkpa nke abụọ nke irighiri ihe elastomer bụ ịkwụsị ịkpa ike. Mgbe crazing na-ezute ụmụ irighiri elastomer na-agbanwe agbanwe n'oge mgbasa ya, ebe mgbakasị ahụ dị elu dị n'ọnụ ọnụ ya na-amachaghị nke ọma, na-egbochi agụụ ahụ ịmalite ịghọ mgbawa macroscopic na-egbu egbu.
N'otu oge ahụ, itinye uche na nchekasị na-ebutekwa ịkwa mma na matriks polypropylene. Nke a na-ezo aka na nkwụsịtụ na nhazigharị nke agbụ molecular polypropylene n'okpuru nrụgide siri ike, na-emepụta ụdọ shear; usoro a na-achọkwa ike dị ukwuu.
c) Usoro mmesa ike nke Synergistic
N'ikpeazụ, ike a na-etinye n'èzí na-esi n'ụzọ ndị a na-ekpochapụ isi.
Na-akpụ ọtụtụ mkparị: ike oriri.
Nrụrụ na mgbaji nke elastomer ahụ n'onwe ha: oriri ike.
Ịkwasa mkpụrụ nke matriks: ike oriri.
Interface debonding: ahụ elastomer peeling si na matriks, ike oriri.
Usoro a na-abawanye nke ukwuu ọrụ achọrọ maka mgbaji ihe, macroscopically gosipụtara dị ka mmụba dị ịrịba ama na ike mmetụta na nguzogide anya mmiri, ma na-abawanye elongation na nkwụsịtụ.
2. Mgbanwe Ọdịdị Usoro: Na-emetụta Omume Crystallization
Mgbakwunye nke elastomers ọ bụghị naanị na-arụ ọrụ dị ka "ihe mgbakwunye" anụ ahụ kamakwa ọ na-emetụta microstructure nke polypropylene.
Nnụcha Spherulites: Ahụhụ Elastomer nwere ike ịrụ ọrụ dị ka saịtị nucleation dị iche iche, na-akpaghasị nhazi oge niile nke agbụ molekul polypropylene ma mee ka ha na-egbuke egbuke n'ime ụlọ spherulite dị mma.
Imezi Interface: Site na iji compatibilizers, adhesion interfacial n'etiti elastomer na polypropylene matrix nwere ike ime ka ọ dịkwuo mma, hụ na enwere ike ibufe nrụgide nke ọma site na matrix gaa na elastomer particles, si otú ahụ na-ebute crazes na ịkwanye banding.
Ngwa ndị akọwapụtara na Spunbond Nonwoven Fabric Mmepụta
Itinye ụkpụrụ ndị a n'elu n'ọrụ na mmepụta nke spunbond ákwà na-abụghị nke nwere mmetụta ndị a:
Enwetara ike nke eriri ndị mmadụ n'otu n'otu:
N'oge usoro ntụgharị, a na-agbatị agbaze polypropylene nwere elastomers n'ime eriri. Eji eriri emezigharịrị n'onwe ha na-esiwanye ike. N'okpuru ike mpụga, eriri ndị ahụ adịghị adịkarị mfe mgbaji na-agbaji ma nwee ike nweta nrụrụ plastik ka ukwuu, na-enweta ume karịa.
Ịmesi ike na ime ka usoro netwọk fiber sie ike:
N'oge mgbagharị na-ekpo ọkụ, eriri ndị ahụ na-ejikọta na ebe ntụgharị. Fibers nwere ike ka mma anaghị adịchakarị agbaji ozugbo n'ebe a na-emegharị ahụ mgbe ike dọkasịa ya.
Enwere ike kesaa ike mpụga nke ọma karịa n'ime netwọkụ eriri. Mgbe eriri na-enwe nrụgide dị ukwuu, ọ nwere ike ibufe nrụgide ahụ na eriri ndị gbara ya gburugburu site na nrụrụ, na-egbochi ọdịda ngwa ngwa nke nrụgide nchekasị kpatara.
Ọwụli elu n'ihu n'ịkwado anya mmiri na nkwụsị:
Mgbochi anya mmiri: Ịdọkasị bụ usoro ịgbawa mgbawa. Ụmụ irighiri ihe Elastomer na-amalite nke ọma ma kwụsịchaa ọtụtụ microcracks, na-egbochi ha ịgbakọ n'ime mgbawa macroscopic, na-ebelata usoro ndọkasị ahụ nke ukwuu.
Mgbochi nke ntapu: Ịgba ntanye bụ ngwakọta dị mgbagwoju anya nke mmetụta na ndọkasị. Ihe ndị siri ike dị elu nwere ike ịmịpụta mkpụrụ na nrụrụ dị ukwuu mgbe ihe si mba ọzọ mapuo, na-ekpuchi ihe na-adụpu kama ịpịa ya ozugbo.
Mmechi
Nchịkọta: Ụkpụrụ nke ngbanwe nke elastomer iji meziwanye ike nke spunbond nonwovens bụ n'ezie ijikọta matrix polypropylene siri ike ma na-agbaji agbaji na rọba dị nro, na-agbanwe agbanwe nke ukwuu, na-arụ usoro nkwụsị ike nke ọma n'ime ihe.
Site n'ịkwalite crazing, na-akwụsị cracks, na ịkwalite shiee na-amịpụta site na microscopic usoro n'ibu, ike mbibi (mmetụta, dọka) etinyere n'èzí na-aghọ nnukwu ego nke obere ọrụ nrụrụ na-adịghị emebi emebi. Nke a macroscopically na-akwalite nguzogide ihe nke ihe ahụ, nguzogide ndọka, na elongation na nkwụsịtụ, na-agbanwe akwa na-adịghị akwa spunbond site na "na-emebi emebi" ka ọ bụrụ " siri ike." Nke a yiri ịgbakwụnye ogwe ígwè na ciment, nke na-abụghị nanị na-abawanye ike mana, nke ka mkpa, na-enye ike siri ike.
Ụgwọ nke ụlọ ọrụ Dongguan Liansheng Non Woven Technology Co., Ltd.e hiwere na Mee 2020. Ọ bụ nnukwu ụlọ ọrụ mmepụta ihe na-abụghị akwa na-ejikọta nyocha na mmepe, mmepụta na ahịa. Ọ nwere ike ịmepụta agba dị iche iche nke PP spunbond akwa na-abụghị kpara nke nwere obosara nke na-erughị mita 3.2 site na gram 9 ruo 300.
Oge nzipu: Nov-16-2025