1. Yog vim li cas
Daim txhuam cev yog cov khoom pov tseg, thiab cov nqi thauj mus los yog siab. Txhawm rau txo cov nqi tsheb thauj mus los, ntau lub Hoobkas yuav ntim cov pob thiab xa cov khoom yog tias tus neeg siv khoom tsis hais txog nws.
Rau cov paj rwb zoo tib yam, tom qab lub ntim tau muab tshem tawm, nws tuaj yeem rov qab tau txog li 95 feem pua lossis ntau dua ntawm nws qhov loj me, thiab cov paj rwb zoo tib yam uas muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom zoo tuaj yeem yuav luag rov zoo li 99% lossis tag nrho.
Tab sis rau qeeb-rebound sponges, qhov xwm txheej txawv. Tom qab yuav luag tag nrho cov kev qhia tshwj xeeb ntawm qeeb-rebound sponges yog compressed, ntim, thiab thauj, yuav muaj ob qhov xwm txheej: ib qho yog tias lawv tsis tuaj yeem rov qab tau ib ntus, tab sis ntev npaum li lub zog tsis siv lawm thiab lub sijhawm muab ntev txaus, daim txhuam cev yuav NW nyuam qhuav rov qab. kaw rau qhov loj me me; nyob rau hauv rooj plaub thib ob, txawm tias tom qab lub sijhawm ntev txaus, nws tsis tuaj yeem rov qab los yog ze rau qhov loj me me, thiab thaum kawg dhau los ua cov khoom tsis raug.
Yog li ntawd, cov khoom lag luam qeeb-rebound feem ntau nkag mus rau Tuam Tshoj yog qhov pib tsis xa mus rau hauv cov ntim ntim. Txawm hais tias tus nqi tsheb thauj mus los tseem siab, cov khoom lag luam zoo tau lees paub, thiab cov khoom siv thiab kev xav tau tuaj yeem nyob kaj siab lug.
Txawm li cas los xij, rau cov tuam txhab ua lag luam xa tawm, tus nqi siab ntawm kev thauj mus los hauv intercontinental muaj kev cuam tshuam zoo rau kev tsim khoom thiab kev ua haujlwm, yog li lawv yuav tsum xav txog txoj kev ntim compression. Txawm li cas los xij, tom qab compressed ntim thiab kev thauj mus los ntev, qee cov khoom tsis tuaj yeem rov qab los rau cov neeg siv khoom cov lus txiav txim tom qab unpacking, thiab raug tsis lees paub los ntawm cov neeg siv khoom. Qhov xwm txheej no yuav ua rau qee qhov poob rau ob qho tib si cov khoom siv thiab kev xav tau, thiab qhov tshwm sim ntawm kev lag luam tsis sib haum xeeb yuav tsis tshua muaj.
2. Ua rau Analysis
Lub peev xwm los tiv thaiv kev sib txhuam ntawm daim txhuam cev muaj feem xyuam rau ntau yam xws li cov qauv ntawm ntau ntu uas ua rau daim txhuam cev, cov tshuaj siv hluav taws xob sib txuas ntawm cov molecules, crystallinity ntawm cov polymer, qib ntawm theem sib cais, cov qauv ntawm isocyanate, thiab kev faib ua feem ntawm isocyanate siv.
a. Lub sponge qeeb rebound yog ua los ntawm siab molecular hnyav polyol thiab tsis tshua muaj molecular hnyav polyol reacted nrog isocyanate. Cov ntu mos uas tsim los ntawm qhov hnyav molecular hnyav polyol muaj cov ntim loj, tsis tshua muaj kev sib txuas ceev thiab kev ua haujlwm siab. Qhov kev ua tau zoo sab nraud yog tias nws yooj yim rau compress, thiab yooj yim rov qab los tom qab lub siab sab nraud raug tshem tawm. Cov ntu nyuaj uas tsim los ntawm qhov hnyav molecular polyol yog qhov me me hauv ntim, siab nyob rau hauv kev sib txuas ceev thiab qis hauv kev ua haujlwm. Kev ua haujlwm sab nraud yog qhov nyuaj rau compress thiab nyuaj rau rov qab los tom qab lub zog sab nraud raug tshem tawm. Cov yam ntxwv no ua rau daim txhuam cev nthuav tawm cov yam ntxwv ntawm qeeb rov qab, thiab tseem yog lub hauv paus rau kev tsim cov sponge qeeb.
Vim hais tias ntawm cov khoom sib txawv ntawm cov ntu mos thiab cov ntu nyuaj hauv cov kab rov tav qeeb qeeb, muaj qee theem kev sib cais ntawm cov ntu ntu. Yog tias tsis muaj theem kev sib cais ntawm ntu, lub cev daim txhuam cev yog qhov sib xyaw ua ke tag nrho macroscopically, thiab qhov tshwm sim ntawm "rub ib cov plaub hau thiab txav tag nrho lub cev" yuav tsim, uas yog, tag nrho lub cev shrinks thaum compression, thiab tag nrho. lub cev rov qab los tom qab lub siab tso tawm. Txawm li cas los xij, microstructure ntawm daim txhuam cev txiav txim siab tias qhov xwm txheej no tsis tuaj yeem ua tiav 100 feem pua. Tshwj xeeb, ntau ntu ntawm daim txhuam cev qeeb-rov qab muaj cov qauv molecular sib txawv, tsis sib xws molecular hnyav tis, thiab kev sib cais theem tsis tau. Kev sib cais me ntsis ua rau cov txheej txheem rov qab los tom qab tshem tawm cov kev quab yuam sab nraud, qee qhov nyuaj ua rau "nplaim los ntawm net" vim lawv cov kev ua haujlwm qis thiab nyuaj rau kev rov qab los. Qhov no plam-los ntawm cov ntses ntau dua los yog tsawg dua qhov kev rov qab los ntawm cov mos mos, uas nws thiaj li ua rau shrinkage. .
b. Lub crystallinity ntawm cov ntu nyuaj yog muaj zog dua li ntawm cov mos mos, uas kuj yog ib qho ntawm cov laj thawj rau cov neeg pluag rov qab. Cov ntaub ntawv muaj qhov sib xws zoo sib xws, uas tseem siv tau rau qeeb-rebound sponges. Vim qhov ze ze ntawm qhov sib txuas ntawm cov ntsiab lus sib txuas thiab qhov sib txuas ntawm qhov sib txuas siab, cov ntu nyuaj tuaj yeem sib sau ua ke ntau dua vim qhov me me molecular hnyav tsim. Cov khoom sib xyaw ua ke ntawm hydrogen-muaj cov khoom no tau txhim kho crystallinity vim muaj cov ntawv cog lus hydrogen. Thaum muaj zog, kev sib koom ua ke yuav zoo heev. Tom qab compression, sab nraud quab yuam hloov lub xeev sib sau ua ke ntawm cov ntu ntu, ua kom yooj yim rau cov pab pawg uas muaj cov polarities zoo sib xws rau fuse ua ke (ib yam li thaum dov noodles, koj yuav tsum tsis tu ncua sprinkle cornmeal los yog sorghum noodles ntawm dov mov paj, txwv tsis pub nws yuav yob. up Thaum dov dua, lub khob noom cookie yuav nrawm ua ke). Tom qab tshem tawm ntawm cov quab yuam sab nraud, lub xeev tshiab tau tsim ua ke yog qhov nyuaj rau rov qab los rau lub xeev ua ntej lub zog vim muaj kev sib koom ua ke, uas ua rau lub shrinkage ntawm qeeb-rebound daim txhuam cev.
c. Cov qauv ntawm isocyanate kuj yog ib qho ntawm cov yam ntxwv cuam tshuam rau kev ua haujlwm ntawm cov ntaub so ntswg qeeb. Feem ntau, TDI yog siv los tsim cov sponges qeeb-rebound. Txij li thaum 2 NCOs hauv TDI molecule nyob rau hauv 2, 4- txoj hauj lwm thiab 2, 6- txoj hauj lwm, muaj qee lub kaum sab xis ntawm lawv, uas yooj yim rau deform nyob rau hauv kev ntxhov siab, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv. ntawm kub nias, uas yuav ua rau loj Deformation thiab kub poob, uas yog tshwj xeeb tshaj yog pronounced ntawm paj rwb bras, yuav nyuaj rau rov qab los ntawm cov deformations.
d. Qhov qis qis ntawm isocyanate siv rau hauv kev npaj ntawm daim txhuam cev qeeb qeeb kuj yog vim li cas rau qhov tsis zoo ntawm daim txhuam cev rov qab. Lub isocyanate Performance index ntawm daim txhuam cev zoo tib yam yog siab dua 100, thaum nyob rau hauv qeeb rebound daim txhuam cev, lub isocyanate Performance index feem ntau yog nyob nruab nrab ntawm 85-95, uas yog hais tias, muaj 5-15 feem pua ntawm hydroxyl pawg uas tsis koom nyob rau hauv lub tshuaj tiv thaiv. Yog li ntawd, tsis muaj tag nrho cov network hauv daim txhuam cev. Qhov saum npoo zoo li tag nrho, tab sis feem ntau ntawm cov saw ntu sab hauv yog ywj siab.
3. Kev tshawb nrhiav tswv yim
a. Siv siab EO polyether (hu ua inflatable polyether) los hloov ib feem ntawm qeeb rebound polyether.
Lub siab EO polyether muaj qis hydroxyl tus nqi thiab loj molecular hnyav. Cov saw ntu uas tsim los ntawm cov tshuaj tiv thaiv nrog isocyanate muaj qhov hnyav molecular ntau dua lossis ze rau cov saw ntu uas tsim los ntawm cov tshuaj tiv thaiv ntawm polyether thiab isocyanate, uas txo cov qib ntawm theem sib cais thiab txo cov crystallinity.
High EO cov ntsiab lus polyether, cov ntu ntu yog mos thiab tuaj yeem muab cov nyhuv qeeb rov qab zoo. Tsis tas li ntawd, qhov sib ntxiv ntawm siab EO polyether tuaj yeem txhim kho qhov kub thiab txias tsis kam ntawm qeeb rebound daim txhuam cev. Muaj ntau ntau yam khoom siv hauv khw, xws li Changzhou Zhongya's 5041, Shanghai Dongda's 3500, Jiahua's 1621/1623, Shandong Yinuowei's 8001A, thiab lwm yam.
b. Ntxiv ib qho me me ntawm polyether-hloov polyester los txhim kho cov cohesion ntawm cov khoom.
Vim muaj cov pab pawg ester hauv ntu polyester, kev sib koom ua ke yog qhov loj, thiab cov teebmeem tensile thiab tensile zoo, thiab compression tsis kam ntawm daim txhuam cev qeeb-rebound yog qhov zoo dua. Tus sau ib zaug siv cov polyester-hloov polyester PM-580 ntawm Zibo Chongmei Tuam Txhab los npaj qeeb-rebound daim txhuam cev, thiab ua tiav cov txiaj ntsig zoo siab.
c. Siv ib qho me me ntawm kev ua haujlwm siab thiab siab-molecular-qhov hnyav polyether ua tus neeg sawv cev sib txuas, thiab siv qee qhov kev ua haujlwm siab polyether es tsis txhob siv cov polyether zoo tib yam rau qeeb rov qab.
Qhov no tsis tsuas yog cuam tshuam cov ntu faib, tab sis kuj txo cov qib ntawm theem sib cais, txhim kho qib ntawm cov tshuaj tiv thaiv, thiab txo cov crystallinity. Piv txwv li, hloov ib feem ntawm ntau polyether nrog 330N thiab ntxiv ib qho me me ntawm high-functionality polyether los ntawm Shanghai Dongda / Jiahua tuaj yeem txhim kho qhov kev sib txhuam.
d. Siv MDI lossis ntxiv MDI rau TDI.
Txij li cov qauv ntawm MDI txawv ntawm TDI, daim txhuam cev uas tsim nrog nws muaj qhov zoo compression tsis kam thiab tsis tshua muaj cua sov. Yog tias yuav siv MDI, nws yog qhov zoo tshaj plaws los siv hloov kho MDI (coarse MDI nrog qib siab branching thiab yooj yim kaw qhov pores), xws li Wanhua's 8019, 8223; Huntsman's 2412, liquefied MDI kuj tuaj yeem siv tau, vim liquefied MDI yog ib qho intramolecular cyclization, resistant rau compression. Lub siab tsis kam ntawm tag nrho-MDI qeeb-rebound daim txhuam cev yog zoo dua li cov ntshiab TDI, thiab ntau lub tuam txhab tau siv nws.
