Ku cinca eka Xivumbeko xa PTFE Crystalline Hi nkarhi wa Sintering ya PTFE High-Temperature Cloth

Jiangsu Aokai New Materials, muendli wa xiphurofexinali wa lapi ra mahiselo ya le henhla ya PTFE, u andlala hi vuenti hi ku hundzuka ka xivumbeko xa kristala ya PTFE eka endlelo hinkwaro ra sintering ra lapi ra mahiselo ya le henhla ya PTFE.

I. Ku onhiwa ka Xivumbeko xa Crystalline xo Sungula

1. PTFE crystalline morphology loko kungase endliwa sintering

Loko kungase endliwa sintering, PTFE yikona tani hi ti dispersed emulsion particles leti khomaneke na fiberglass fabric. Xiphemu xin’wana na xin’wana xi na ti crystalline swinene ta folded-chain lamellae letingana ti microcrystals letintsongo, leti hlengeletiweke kahle.

2. Ku cinca ka xivumbeko hinkarhi wa ku hisiwa ka sintering

Loko mahiselo ya tlakukile ehenhla ka ndzhawu yo n’oka (~327°C), ti crystals hinkwato ti n’oka hiku hetiseka. Ti molecular chains leti hlanganisiweke ti pfuleka naku hambana, ti hundzuka amorphous melt. Mindzilakano ya ti particles yosungula ya nyamalala loko ti particles ti hlangana kuya eka xiphemu lexi yaka emahlweni xa molten, leswi tshovelaka hiku hetiseka xivumbeko xosungula xa granular crystalline.

II. Recrystallization Hi nkarhi wa ku kufumela

1. Ku vumbiwa ka swivumbeko swa spherulitic

Loko yi hola kusuka eka xiyimo xa molten, PTFE yi hatlisa yi recrystallizes kuva yi endla spherulites leyi vumbiweke hi radially oriented folded-chain lamellae leyi hangalakaka ehandle kusuka eka tindzhawu ta central nucleation. Ti spherulites leti ti nghenaka exikarhi ti aka matrix ya crystalline leyi yaka emahlweni, ku siva xivumbeko xosungula xa ti particle leti pakiweke.

2. Ku hambana ka crystallinity yo hetelela

PTFE yi na ti molecular chains leti tiyeke, leti tolovelekeke swinene, leti tisaka ti crystallization rates leti hatlisaka swinene hambi ehansi ka ku kufumela loku hatlisaka swinene. Crystallinity yohetelela hi xitalo yisuka eka 50% kuya eka 70%, ehansi nyana kutlula ya ti particles ta emulsion tosungula.

III. Ku hundzuka ka Tipharamitha ta Crystalline na Swivumbeko swa Crystal

1. Ku hlayisiwa ka xiphemu xa kristala lexi tiyeke

Endzhaku ko hola kuya eka mahiselo ya kamara, PTFE yi hlayisa sisiteme ya crystal ya hexagonal leyi tiyeke (room-temperature hexagonal phase), leyi fanaka na xivumbeko xa yona xa crystal xa pre-sintering. Ku cinca hinkwako ka xivumbeko swihumelela eka vukulu bya crystal, ku hetiseka na morphology kutlula xiphemu xohetelela xa crystal.

2. Nkucetelo wa mpimo wa ku kufumela eka ku hetiseka ka kristala

· Ku kufumela hiku nonoka swihumesa crystallinity yale henhla, spherulites leyikulu xikan’we na ti lamellae to tiya, leti hlamuseriweke kahle, leswi endlaka leswaku kuva na switirhisiwa leswingana ku tiya loku tlakukeke xikan’we na density.

· Ku tima hiku hatlisa swiyisa eka crystallinity yale hansi swinene, ti spherulites letintsongo, letinga hetisekangiki ngopfu, xikan’we naku antswisiwa ka ku olova na semi-transparency ya swilo leswi hetiweke. Ku kufumela hiku nonoka i standard eka lapi ra PTFE ra mahiselo yale henhla ku fikelela swilaveko swa matimba ya michini.

IV. Vuyelo bya Interfacial Crystallization eka Fiberglass na Nkoka hi ku angarhela

1. Xiendlakalo xa transcrystallization

Loko PTFE melt yi hola eka swiphemu swa fiberglass, tindzhawu ta dense nucleation eka vuandlalo bya fibre ti hlohletela transcrystallization: columnar crystal layer yikula perpendicular eka fibre axis, leyi hambaneke swinene na spherulite morphology endzeni ka bulk coating.

2. Xivumbeko xa gradient kusuka eka fibre interface kuya eka coating bulk

Ehansi ka nkucetelo wa fiberglass, xivumbeko xa PTFE crystalline xi endla ku cinca ka gradient: transcrystalline layer leyi nga ekusuhi na ti fibre hakatsongotsongo yi cincela eka swivumbeko swa spherulitic eka matrix ya le ndzeni ya coating.

3. Vuyelo bya xiboho bya ku cinca ka xivumbeko eka matirhelo ya malapi ya PTFE

Sintering yi hundzula ti granular folded-chain PTFE crystals: ti hundza eka ku n’oka na ku tshoveka ka xivumbeko, kutani ti recrystallize kuva ti ya emahlweni, ti dense spherulites (na ti interfacial transcrystalline layers). Leswi swihundzula ti loose packed powder particles kuva intact continuous film, leswi kunga xilaveko xa nkoka xa leswaku coating yi tisa matirhelo yo angarhela kukatsa na ku lwisana na kuhisa, friction yale hansi, non-stick property xikan’we na chemical corrosion resistance.

Vuxokoxoko bya xithekiniki lebyi nga laha henhla byi nyikiwa hi Jiangsu Aokai Switirhisiwa Leswintshwa Thekinoloji Co., Ltd.

Loko u lava ku kuma swihlawulekisi leswi nga na vuxokoxoko, swiyimo swa xikombelo na swintshuxo leswi endleriweke photifoliyo ya hina leyi heleleke ya swikumiwa ku katsa na lapi ra mahiselo ya le henhla ya PTFE, thepi yo namarhela ya mahiselo ya le henhla ya PTFE, bandi ra mesh ra mahiselo ya le henhla ya PTFE, bandi ro kandziyisa ku hisa leri nga na swirhabyani, lapi ra PTFE ra tlhelo rin’we, bandi ro fambisa leri nga lwisaniki na mahiselo ya le henhla na fiberglass leyi tiyiselaka ku hisa lapi, hi kombela u hi tihlanganisa hi ku tirhisa vuxokoxoko lebyi nga laha hansi:

· Nomboro ya Vukorhokeri: Tatana Guo +86 18944819998

· Nomboro ya Vukorhokeri: Tatana Liu +86 13705266308

Hi seketela vutshila na vutshembeki tanihi filosofi ya hina ya nkoka ya bindzu, hi mbilu hinkwayo hi nyika swintshuxo swa tiindasitiri swa xiyimo xin’we na vukorhokeri bya vaxavi lebyi anakanyisisiweke eka vatirhisani hinkwavo!