Utshintsho lweZakhiwo ze-PTFE Ilaphu lobushushu obuphezulu phantsi kweeMeko zoBubushushu obuphezulu

Ilaphu le-PTFE elinobushushu obuphezulu liyintlanganisela ye-PTFE yokwaleka kunye ne-fiberglass substrate. Xa sisesichengeni sokwanda kwamaqondo obushushu, le mathiriyeli 'ayinyibiliki' ngaxeshanye - ifumana uthotho lotshintsho oluqhubekayo lomzimba kunye neekhemikhali kwiindidi ezine zobushushu ezahlukeneyo.

Ukusuka kwi-micro-cracking kwi-260 ° C ukugqiba ukubola kwi-500 ° C +, utshintsho lwesakhiwo luchaphazela i-PTFE yokugqoka kuqala, emva koko i-fiberglass substrate. Ukuqonda ezi zigaba kubalulekile ekusebenzeni okukhuselekileyo nokuthembekileyo.

I-Aokai PTFE iye yahlalutya ukuziphatha okushushu kwamalaphu agqunywe nge-PTFE kuwo onke amaqondo obushushu. Esi sikhokelo sichaza izigaba ezine eziphambili zenguqu yesakhiwo kunye nokubonelela ngemilinganiselo yokushisa okusebenzayo.

UHlelo loBubushushu beNkonzo yeXesha Elide – Ngaphantsi malunga nama-260°C

Ulwakhiwo lulonke luhlala luzinzile ngelixa lucothayo, utshintsho oluncinci lusenzeka ngokuthe ngcembe.

1. Ukuphumla kwe-PTFE ye-molecular chain kunye nohlengahlengiso lwe-crystallinity

Ukubonakaliswa kwe-thermal ixesha elide kubangela intshukumo kancinane yamatsheyina e-polymer molekyuli kwaye kancinci iphakamisa ubukhazikhazi. I-coating ke ngoko ijika ibe-brittle kancinci kunye nokwanda kokuqina komphezulu. Le yinkqubo ecothayo – inomlinganiselo emva kwamakhulu okanye amawaka eeyure.

2. Ukuqokelelwa koxinzelelo lwe-thermal interfacial

I-PTFE ine-coefficient yokwandiswa kwe-thermal malunga ne- 10×10⁻⁵/°C , engaphezulu lee kune-fiberglass malunga ne- 5×10⁻⁶/°C . Ukuphindaphindwa kwebhayisikile ye-thermal-ebandayo kuvelisa uxinzelelo lwangaphakathi kumda we-coating-substrate, ekugqibeleni yenze i-micro-cracks ngokuhamba kwexesha. Le yeyona ndlela iphambili yokuguga phakathi koluhlu olukhuselekileyo lokusebenza.

3. Ukuguquguquka kwezongezo ezishiyekileyo

Ii-surfactants eziseleyo kunye nee-agent zokumanzisa ezishiyekileyo kwimveliso zibola kancinci kancinci, zikhokelela kubumnyama obumnyama kumphezulu welaphu. Oku akunabungozi kodwa kubonisa ukuba izinto ziyaguga.

Iqondo lobushushu elisondelayo kwaye liBoyisa kwiNdawo yokuNyibilika – malunga ne-327°C

Nje ukuba i-PTFE ifikelele kwiqondo lokunyibilika kwayo, uguquko olumangalisayo lolwakhiwo lomzimba lwenzeka.

1. Ukunyibilika kweCrystalline-region

I-semi-crystalline opaque milky-white PTFE iguqulela ekubeni yijeli e-amorphous efana nolwelo olukhatshwa kukwandiswa komthamo obukhali . I-coating ilahlekelwa onke amandla omatshini kwaye iqala ukuthambisa kunye nokuhamba. Ngeli nqanaba, ilaphu lilahlekelwa ukuzinza kwe-dimensional kunye nokunyaniseka kwesakhiwo.

2. I-Delamination phakathi kokwaleka kunye ne-substrate

Ukunciphisa amandla okubambisana kunye noxinzelelo olubangelwa ukwanda kwe-thermal kubangela ukuba i-PTFE enyibilikisiweyo ibe yi-blister, ixoke, kwaye impompoze kude nelaphu le-fiberglass, elikhokelela kwi-delamination edibeneyo kunye nokusilela kwesakhiwo. Umphezulu ongabambekiyo wonakaliswa ngenxa yoko. Nje ukuba i-delamination yenzekile, ayinakuguqulwa.

3. I-Fiberglass igcina isakhiwo sayo samathambo

Ilaphu lefiberglass lihlala lizinzile kweli nqanaba. Ngaphandle kokhuselo lwe-PTFE umaleko, iifilamenti zeglasi ezingenanto ziba sesichengeni kwi-oxidation kunye nokukhukuliseka kweekhemikhali.

Isilumkiso se-Aokai PTFE: Nohambo olufutshane olungaphezu kwe-327°C lubangela ukudodobala okungenakujikwa. Ilaphu lisenokubonakala licocekile xa lipholile, kodwa i-PTFE yokwaleka iye yahlukana ngokusisigxina kwi-fiberglass, ilahlekelwa yiyo yonke imfezeko yomatshini.

Ukuqala kokuBola kweThermal – 400°C ukuya kuma-500°C

I-PTFE i-molecular backbones iqala ukuqhekeka kweekhemikhali, ukuzisa ukuwohloka kwesakhiwo okungenakuguqulwa.

1. Eyona ndlela ibalaseleyo yokusabela kwi-depolymerization

Ngaphantsi kweemeko-bume ezingenayo ioksijini, i-PTFE ifumana ukuthotywa kohlobo lweziphu . Iibhondi ze-CC ze-covalent kwikhonkco eliphambili zidiliza, ukukhulula ii-monomers zegesi ikakhulu ezibandakanya i-tetrafluoroethylene (ngaphezu kwama-95%) kunye ne-hexafluoropropylene. Ubunzima bemolekyuli buhla ngokukhawuleza, kwaye i-PTFE yokwambathisa icolile kwaye ichithakele.

2. Ukubola kwe-oxidative phantsi kweemeko ze-aerobic

Ioksijini ihlasela iiradicals zasimahla zekhabhoni kwaye ivelisa iigesi eziyityhefu ezifana ne-carbonyl fluoride (COF₂) kunye ne-trifluoromethane, ehamba nevumba elibukhali elibukhali. IHydrogen fluoride (HF) kunye ne-perfluoroisobutylene (PFIB) nazo zinokukhutshwa phantsi kweemeko ezithile.

3. Landela intsalela yekhabhoni

I-PTFE esulungekileyo iba ngumphunga phantse ngaphandle kokushiyeka kwekhabhoni. Ukutshintsha kombala omnyama elaphuni kudla ngokuvela kwi-carbonization ye-fiberglass sizing agents, izinto ezingcolisa umphezulu, okanye ii-comonomers ezincinci kwi- modified-grade PTFE.

4. Ukutshiswa kwe-fiberglass sizing agents

Ii-agent zokulinganisa izinto eziphilayo ezigqunywe kwiifilamenti zefiberglass zibola ngaphezu kwe-350°C. Imicu yeglasi iphulukana nokuncamathelana, nto leyo eyenza ukuba ilaphu libe shushu kwaye lithande ukufutha.

(配图4插入位置：本节末尾，展示PTFE在400°C以上分解后仅剩碳化残留物和裸露玻纤）物的

I-caption: Ilaphu le-PTFE emva kokuvezwa kwe-450 ° C - i-coating ibole ngokupheleleyo, ishiya kuphela intsalela ye-carbonized kwaye ibonakaliswe, i-fiberglass ene-fluffy.

INdawo yokuTshakala koBuqondo obuPhezulu – Ngaphezu kwama-500°C

I-PTFE yokwambathisa iye yanyamalala ngokupheleleyo, ishiya kuphela i-fiberglass engenanto ephantsi inomthwalo oqhubekayo wobushushu obuphezulu.

1. Ukuthamba kwe-E-glass fiber

I-E-glass fiber eqhelekileyo inendawo yokuthamba emalunga ne- 840°C . Nangona kunjalo, amandla ayo okuqina ehla ngokuphawulekayo ngaphezu kwe-500 ° C. Xa ishushu ngaphezu kwe-800 ° C, ilaphu le-fiberglass lilonke liyathamba, ligqwese, kwaye ligxumeke kwaye liphulukane nomthamo wenkxaso yesakhiwo.

2. Ubushushu obuphezulu kunye ne-devitrification

Ukubonakaliswa kwexesha elide lobushushu obuphezulu kubangela ukunwenwa kwemicu yeglasi, kulandele i-devitrification kunye ne-pulverization ediliza ngokupheleleyo ubume belaphu. Ngeli nqanaba, ilaphu alisabonakali njenge-textile - iba yinto ekhululekile, enqabileyo yobunzima beglasi.

Isishwankathelo - Amanqanaba obushushu kunye neMida ebalulekileyo

I-Aokai PTFE icebisa ngokungqongqo ukulawula ubushushu bexesha elide lokusebenza ngaphantsi kwe -260 ° C kunye nokunciphisa iincopho zexesha elifutshane ukuya kwi -300 ° C ubuninzi ukunqanda ukungaphumeleli kokusebenza kunye nemingcipheko yokhuseleko enokubakho ebangelwa yi-delamination kunye nokubola kwe-thermal.

Umxholo wobugcisa ochazwe ngasentla unikezelwa ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.

Ukuba unqwenela ukufumana iinkcukacha zeeparamitha zobugcisa, iimeko zesicelo kunye nezisombululo ezilungiselelwe ipotifoliyo yethu yoluhlu olupheleleyo, kubandakanywa ilaphu le-PTFE elinobushushu obuphezulu, iteyiphu yokuncamathela yobushushu obuphezulu be-PTFE, ibhanti elinobushushu obuphezulu be-PTFE, ibhanti lokucinezela ukushisa elingenamthungo, icala elinye le-PTFE elimelana nobushushu bobushushu obuphezulu kunye ne-fiberglass ekwazi ukumelana nobushushu obuphezulu. ilaphu, nceda ufikelele kuthi ngeenkcukacha zoqhagamshelwano ezingezantsi:

• Mnu. Guo: +86 18944819998

• UMnu. Liu: +86 13705266308

Siphakamisa ubuchwephesha kunye nemfezeko njengentanda-bulumko yethu yoshishino, sizibophelele ekuboneleleni ngezisombululo zemizi-mveliso eziye zizonke kunye nenkonzo ecingayo ejolise kubathengi!