Kev Tsim Cov Khoom Siv Raw thiab Kev Tshawb Fawb Plaub Yam Txheej Txheem ntawm EVA Ua Npuas Ncauj

Kev Tsim Cov Khoom Siv Raw thiab Kev Tshawb Fawb Plaub Yam Txheej Txheem ntawm EVA Ua Npuas Ncauj
EVA, ethylene vinyl acetate copolymer, cov ntaub ntawv polymer. EVA midsole yog lub teeb thiab zoo lub cev, yog cov khau hnav rau cov neeg laus, khau kis las, thiab khau hnav yooj yim siv cov khoom siv ntau tshaj plaws. Niaj hnub no, peb yuav kawm paub txog EVA ua npuas ncauj los ntawm cov khoom siv raw thiab plaub txoj kev ua.

A. EVA ua npuas ncauj tsim cov khoom ntawd

Feem ntau, cov khoom siv ua npuas dej EVA muaj cov khoom siv raw hauv qab no: cov khoom siv tseem ceeb, cov khoom sau, cov neeg sawv cev ua npuas dej, cov neeg sawv cev txuas, cov khoom ua npuas dej accelerator, thiab cov roj nplua nyeem.

Cov khoom tseem ceeb, uas yog EVA lossis PE. Tau kawg, txhawm rau txhim kho cov khoom siv lub cev ntawm cov khoom, koj tuaj yeem ntxiv qee cov ntaub ntawv ntxiv, xws li roj hmab, POE (polyethylene octene co-elastomer), thiab lwm yam, tab sis kuj tseem tuaj yeem ntxiv me ntsis TPR (yog kev sib xyaw ua ke ntawm roj hmab thiab thermoplastic cov khoom ntawm cov khoom) los txhawb qee yam khoom siv lub cev.

EVA, qhov qhia tseem ceeb yog cov ntsiab lus VA, nws qhov siab thiab qis qhov kev txiav txim siab yuav luag txhua qhov kev ua tau zoo ntawm EVA ua npuas ncauj khoom muaj feem cuam tshuam ncaj qha. Tau kawg qee qhov tsuas yog siv PE kuj tuaj yeem ua npuas ncauj. Tshwj xeeb nrog cov khoom tseem ceeb lossis nyob ntawm qhov xav tau ntawm cov khoom.

Cov khoom siv filler, tam sim no calcium carbonate lossis talcum hmoov feem ntau yog siv. Nws yog siv los txo tus nqi, ua kom cov khoom ruaj khov, thiab lwm yam, tab sis kuj tuaj yeem ua lub luag haujlwm hauv kev ua kom sov. Feem ntau qhov loj ntawm cov khoom me me ua qhov qhia txog qhov zoo (ntawm chav kawm, cov dej ntsiab lus kuj yog ib qho), piv txwv li, 120 mesh, 400 mesh, thiab lwm yam. Hauv paus ntsiab lus, qhov zoo dua qhov zoo dua, ntawm chav kawm, tus nqi kuj yuav siab dua. Qhov ntau tshaj plaws hauv daim ntawv qhia kuv tau pom 40Phr (qhov ntau yog feem pua ​​ntawm cov khoom tseem ceeb).

Tus neeg sawv cev ua npuas ncauj, feem ntau siv AC series ntawm tus neeg sawv cev ua npuas ncauj, xws li AC-3000H, AC series ntawm tus neeg sawv cev ua npuas ncauj yog tus neeg sawv cev ua npuas ncauj kub siab, qhov kub ntawm kev lwj hauv ntau dua 220 degrees.

Kuj tseem muaj cov tshuaj ua npuas ncauj kub qis, xws li AD-300, qhov kub lwj ntawm 140 degrees, thiab cov tshuaj ua npuas ncauj kub nruab nrab. Vim tias tus nqi tsis sib txawv ntau, thiab cov tshuaj ua npuas ncauj kub siab yuav ruaj khov, yog li tam sim no ntau cov EVA qub hloov mus rau qhov kub siab, tab sis kuj siv AC koob tshuaj, nyob ntawm tus lej sib npaug.

Tus neeg sawv cev txuas hniav uas siv ntau tshaj plaws tam sim no yog DCP (di-sec-octyl phthalate), yav dhau los kuj tau siv TAIC, PL400, thiab lwm yam. Lub sijhawm ib nrab ntawm DCP yog 1 feeb ntawm 180 degrees Celsius thiab 10 feeb ntawm 130 degrees Celsius, yog li feem ntau, thaum xyaum ua cov khoom siv, qhov kub thiab txias yuav tsum tswj tau qis dua 120 degrees Celsius.

Qee cov khoom uas xav tau ntxhiab tsw tuaj yeem siv lwm tus neeg sawv cev txuas, BIPB, uas feem ntau siv ua ke nrog TAIC. Qhov ntau npaum li cas ntawm DCP yog 0.5-0.6Phr rau cov ua npuas tiaj tus thiab cov ua npuas me me hauv pwm, thiab 0.8-1.0Phr rau cov ua npuas txhaj tshuaj, tab sis kuj muaj qhov sib txawv hauv kev siv.

Muaj ob hom tshuaj ua npuas ncauj, zinc oxide hmoov thiab zinc stearate hmoov, uas siv ntau niaj hnub no. Peb siv ob hom no ua ke ntawm no, tab sis tam sim no peb tsuas yog siv zinc oxide xwb. Ib hom kuj tuaj yeem ua tiav qhov txiaj ntsig, thiab qhov ruaj khov ntawm cov khoom kuj tseem yuav zoo dua. Zinc oxide txo qhov kub ntawm AC kom txog li 160 degrees, uas ua rau kev tsim khoom yooj yim dua. Peb muaj kev pom zoo ntawm no, qhov ntau ntawm zinc oxide tsis pub tshaj 0.2Phr, thiab cov khoom shrinkage ntau dhau yuav loj heev. Tau kawg, yog tias tsawg dhau, qhov ceev ntawm kev ua npuas ncauj qeeb dhau, yog li nws zoo tshaj plaws kom tsis txhob tsawg dua 1.0 teev /.

Cov roj nplua nyeem feem ntau yog stearic acid. Qhov tseeb, nws tsis muaj ntau yam nyhuv, yog cia cov khoom siv xyaum, tsis yog lub tshuab nplaum. Nws tsis zoo siv ntau dua, vim nws tuaj yeem txo qhov kev sib txhuam ntawm cov ntsiab lus, yog li ntawd feem ntau ntawm cov khoom siv lub cev raug txo thiab pom zoo 0.5Phr.

B. Txog Cov Txheej Txheem

Feem ntau, EVA ua npuas ncauj muaj plaub txoj kev ua: ib txwm ua npuas ncauj loj tiaj tus, ua npuas ncauj me me hauv pwm, txhaj tshuaj thiab ua npuas ncauj supercritical.

1. Cov txheej txheem txhaj tshuaj

Cov txheej txheem no yog lub hauv paus tseem ceeb ntawm yav tom ntej, ib qho txheej txheem tawm ntawm cov khoom, tab sis qhov tseeb ntawm pwm yog siab dua. Lub hauv paus ntsiab lus zoo ib yam li kev lag luam yas txhaj tshuaj molding, tab sis kev txhaj tshuaj molding yog qhib pwm tam sim ntawd, thiab qhov kub ntawm pwm txawv, uas yog, EVA txhaj tshuaj molding pwm kub thiab lub sijhawm qhib pwm raug kho me ntsis. Tam sim no cov khau kis las paub zoo feem ntau ntawm hom lub cev tau hloov pauv los ua nrog txoj kev no. Lwm txoj hauv kev dua li nws, kev ua haujlwm yog tiag tiag ib lab mais deb.

2. Ua Npuas Ncauj Loj Ib Txwm Muaj

Niaj hnub nim no, cov chaw tsim khoom me me feem ntau siv hom no, thiab tus nqi ntawm cov tshuab thiab cov khoom siv kuj qis heev. Cov txheej txheem no yog ua los ntawm cov ntawv, thiab tom qab ntawd ua rau cov khoom los ntawm cov txheej txheem ntawm kev xuas nrig, sib tsoo thiab lwm yam. Cov xwm txheej ua npuas ncauj yog qhov ruaj khov, qhov kub yog 160-170, lub sijhawm yog txiav txim siab los ntawm qhov tuab ntawm cov pwm, feem ntau 90-110 vib nas this / MM, siab 150KG / square CM.

3. Me me hauv pwm Ua npuas ncauj

Cov txheej txheem no feem ntau yog siv rau hauv cov ntaub ntawv khau, khau kis las los ua thawj lub npuas dej ntawm lub midsole thib ob. Cov khoom siv raug granulated raws li cov mis, hnyav thiab muab tso rau hauv lub pwm qhib, thiab lub npuas dej tawm los ua qhov tsos dav dav ntawm khau.

Qhov nyuaj ntawm cov txheej txheem no yog qhov sib npaug ntawm cov pwm thiab daim ntawv qhia ua noj; txwv tsis pub nws nyuaj rau tswj qhov ntau thiab qhov nyuaj tib lub sijhawm. Feem ntau qhov loj me yog tsim nyog tab sis qhov nyuaj tsis txaus, thiab qhov nyuaj txaus tab sis qhov loj me me.

Cov xwm txheej ua npuas ncauj ntawm cov txheej txheem no muaj kev ywj pheej ntau dua, nyob ntawm cov qauv khoom, ntawm chav kawm, feem ntau yog lub sijhawm hloov pauv, thiab qhov kub hloov pauv tsis ntau.

Ua ntej, peb tau tham txog lub hauv paus thib ob, thiab ntawm no peb qhia txog qhov pwm thib ob. Cov khoom siv ua npuas ncauj qub tau raug zom tawm ntawm daim tawv nqaij thiab nias rau hauv pwm tiav, thiab cov khoom raug tsim los ntawm kev cua sov thiab txias hauv ob kauj ruam.

Qhov kub ntawm qhov cua sov ntawm 125-135 yog qhov tsim nyog dua, siab 50KG / square CM, cua sov rau ib lub sijhawm thiab tom qab ntawd dej txias, coj tawm yog qhov thib ob midsole. Qhov kev sib zog no rau hauv qhov loj ntawm hauv qab yog ruaj khov dua, cov khoom siv lub cev zoo dua.

4. Kev Ua Npuas Ncauj Supercritical

Cov saw hlau EVA yog linear, yog li ntawd, thaum lub sijhawm ua npuas dej, feem ntau yuav tsum ntxiv tus neeg sawv cev sib txuas, los ntawm cov qauv sib txuas kom xauv cov roj. Yog li ntawd, EVA supercritical foaming yuav tsum daws qhov teeb meem ntawm yuav ua li cas xauv cov roj.

Los ntawm cov ntaub ntawv patent thiab qee cov ntaub ntawv ntawm cov tuam txhab, EVA supercritical foaming txheej txheem yog qhov zoo li no: kev sib xyaw ua ke tom qab kev sib txuas, granulation, molding kom tau txais cov khau ua ntej vulcanized, cov khau rau hauv lub tshuab ua npuas autoclave, tus neeg sawv cev ua npuas lub cev rau hauv lub lauj kaub, siv txoj kev txo qis siab kom tau txais cov khoom siv ua npuas microporous.

Kev hloov pauv ntawm cov khoom siv EVA: granulation - txhaj tshuaj / txhaj tshuaj molding - ua npuas ncauj - khau khiab.

Cov txheej txheem ua npuas dej zoo li no tuaj yeem nkag siab yooj yim li cov txheej txheem ntawm kev ua npuas dej, cov tshuaj lom neeg ua rau hauv cov tshuaj lom neeg, ntxiv rau kev ua haujlwm sai sai, koj tuaj yeem tau txais cov khoom siv ua npuas dej EVA supercritical. Yog tias koj xav kom tag nrho cov txheej txheem kom zoo rau ib puag ncig thiab huv si, cov txheej txheem sib txuas ua ntej tuaj yeem hloov nrog cov tshuaj sib txuas ua ke xws li kev sib txuas hluav taws xob.

Cov txheej txheem ua npuas dej supercritical tau tsim ntau dua thiab paub tab dua hauv ob xyoos dhau los, cov khoom siv thiab thev naus laus zis tau zoo dua qub, uas tswj cov qauv, cov txheej txheem, yog li nws muaj kev ua tau zoo heev thiab tswj kev ntsws thiab tus nqi yog qhov tseem ceeb.