Yintoni ebangela ukuqhekeka kwinkqubo ye-PTFE Impregnation?

Njengomvelisi womthombo oqeqeshiweyo we-PTFE amalaphu aphezulu obushushu, i-Jiangsu Aokai New Materials iya kuchaza izizathu zokuqhekeka kwilaphu lefiber yeglasi emva kokufakwa kwe-PTFE (polytetrafluoroethylene) emulsion. Lo ngumba wenkqubo eqhelekileyo kwimveliso yezinto ezidibeneyo, edla ngokwenzeka ngexesha lokumisa (ukususwa komswakama kunye ne-surfactants) okanye i-sintering yobushushu obuphezulu (ukunyibilika amasuntswana e-PTFE kwifilimu eqhubekayo).

1. UKudityaniswa Okumandla kwe-Thermal Expansion Coefficients

Lo ngunobangela womzimba osisiseko.

Kukho umahluko omkhulu kwi-thermal yokwandisa i-coefficients phakathi kwefayibha yeglasi kunye ne-PTFE:i-linear yokwandisa i-coefficient yefiber yeglasi imalunga ne- 5×10⁻⁶/℃ ,ngelixa leyo ye-PTFE imalunga ne- 100×10⁻⁶/℃ ukuya kwi-200×10⁻⁶  ngokurhabaxa kweglasi/⁻⁶ amaxesha eglasi /⁻⁶

Ngexesha lokupholisa (ukusuka kwiqondo lobushushu le-sintering elimalunga ne-380℃–400℃ ukuhla ukuya kwiqondo lobushushu begumbi), i-PTFE icutheka kakhulu kunesakhelo sosinga lweglasi. Kuba ilaphu legilasi yefayibha lisebenza njengohlaka lwamathambo oluqinileyo, i-PTFE iyanyanzelwa ngexesha lokushwabana, ivelisa uxinzelelo olukhulu lwangaphakathi lobushushu. Xa olu xinzelelo ludlula amandla okuqina kwefilimu ye-PTFE okanye amandla okudibanisa phakathi kwe-PTFE kunye ne-glass fiber, ukuqhekeka kwenzeka ukukhulula uxinzelelo.

2. Ulawulo olungafanelekanga lweeNkqubo zokomisa kunye neSintering

Iiparamitha zokufudumeza zezinto ezifakiweyo zichaphazela ngokuthe ngqo ukuqhekeka:

·  Isantya sokufudumeza esikhawulezayo ngokugqithisileyo : Ngokukodwa malunga ne-100 ℃ (ukufuma okukhawulezileyo kokufuma) kunye ne-200℃–250℃ (ukubola kwee-surfactants kwi-emulsion kunye ne-crystalline transition zone phambi kwe-PTFE sintering). Ukufudumeza okukhawulezayo kubangela uxinzelelo lwangaphakathi kunye nefuthe legesi ukusuka kwi-volatilization ngokukhawuleza ye-solvents kunye nezongezo, okubangelwa ukuqhekeka kwe-coating.

·  Isantya sokupholisa ngokukhawuleza ngokugqithisileyo : Ukuvezwa ngokuthe ngqo kumoya we-ambient ukupholisa ngokukhawuleza emva kokupholisa kudala uxinzelelo oluqatha lwe-shrinkage olukhawulezayo ngenxa yomahluko omkhulu wobushushu, obangela ngokulula iintanda zenethiwekhi.

·  Ubushushu obugqithisileyo be-sintering okanye ixesha elide kakhulu le-sintering : Oku kubangela ukuthotywa kwe-PTFE ubunzima bemolekyuli kunye nolwelo olugqithisileyo, okwenza izinto zibe lula ukuqhekeka phantsi koxinzelelo.

3. Imiba kwiNkqubo ye-Impregnation kunye ne-Emulsion Concentration

Ubukhulu, ukufana kunye nobunzulu bokungena bomaleko omiliselweyo buchaphazela ngqo ubuntununtunu bokuqhekeka:

·  Umaleko oshinyeneyo ngokugqithisileyo wokumitha omnye : Ukusukela ukutyeba okanye ukusebenza kakuhle kwemveliso, iPTFE etyebileyo igalelwa kwipasi enye. Ngexesha lokumisa kunye nokuntywila, i-coating engqindilili inomzila omde wokususwa kwe-solvent kwaye iyancipha i-volumetric shrinkage (PTFE emulsion idla ngokuba nomxholo oqinileyo omalunga ne-60%, oku kuthetha ukuba malunga ne-40% ukufuma kufuneka kususwe), nto leyo ibangela ukuqhekeka kwendawo.

·  Ukumitha okungalinganiyo : Ulwakhiwo lwe-PTFE oludityanisiweyo lwendawo okanye usasazo olungalinganiyo lwe-emulsion kumphezulu welaphu kukhokelela kuxinzelelo lokucutheka oluzingileyo.

:  Ukungena kwe-emulsion engonelanga Ukuba ilaphu lefibre yeglasi ayigalelwanga okanye iphathwe kakubi kumphezulu, i-emulsion ye-PTFE iyasilela ukungena ngokupheleleyo kwimiqulu yefiber kwaye yenza kuphela 'ifilimu yesikhumba' engaphezulu. Le filimu ine-anchoring ebuthathaka kunye ne-substrate kwaye ithande ukuqhawula okanye ukuqhekeka xa ishushu.

4. Imiba eNxulumene neSubstrate

·  Ilaphu lefiber yeglasi engafakwanga wax : Ilaphu lefibre yeglasi liqulathe izinto zokulinganisa (iparafini, iepoxy, njl.njl.) ukusuka kwinkqubo yokuluka. Ngaphandle kwe-dewaxing ephezulu yokushisa okanye ukucocwa kweekhemikhali ngaphambi kokukhulelwa, ezi zinto ze-organic carbonize kunye ne-volatilize ngexesha le-sintering elandelayo, i-gas evelisa i-gas eqhekeza i-coating okanye iyancipha ukudibanisa phakathi kwe-PTFE kunye ne-glass fiber, okubangelwa ukuqhekeka.

·  Ulwakhiwo kunye nobukhulu belaphu leglasi yefibre : Ilaphu leglasi elijiyileyo nelixineneyo (elinjengelaphu elishinyeneyo lesatin) libonisa ubungqongqo obuphezulu kunye nothintelo olomeleleyo kwi-PTFE ukushwabana. Ngeli xesha, i-grooves enzulu phakathi kwe-fiber bundles idla ngokubangela uxinzelelo kunye nokuqhekeka kwimiphetho yegroove ngexesha lokumisa.

Olu lwazi lungasentla lunikezelwe nguJiangsu Aokai New Materials Technology Co., Ltd.

Iiparameters ezineenkcukacha, iimeko zesicelo kunye nezisombululo ezilungelelanisiweyo zoluhlu lwethu olupheleleyo lwemveliso - kuquka i-PTFE i-high-temperature cloth, i-PTFE high-temperature tape, i-PTFE high-temperature mesh belt, amabhanti angenamthungo omatshini bokudibanisa, ilaphu le-PTFE elinecala elinye, i-high-temperature-high-temperature tape, i-glass-resistant resistant-free-belt-high-temperature-resistant fabrics ukunxibelelana nathi:

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