Hi kwihi ku yelana ka nhlayo exikarhi ka gel fraction index ya swinamarheti leswi twaka ntshikelelo wa silicone na matimba yo hlangana ya leyara ya namarheta?

I. Nhlamuselo na Maendlelo yo Pima ya Swikombiso

1. Xiphemu xa gel: .

   Xiphemu xa gel xivula phesente ya vukulu bya netiweke leyi hlanganisiweke eka silicone pressure-sensitive adhesive leyi pfanganisiweke Teflon high-temperature tape leyinga khulukiki eka swintshuxo swa kahle (kufana na toluene). Endlelo ro pima ri katsa ku phutsela pure adhesive film eka filter mesh, ku yi humesa eka Soxhlet extractor kuringana 24 wa tiawara, kutani ku omisiwa masalela lawa yanga khulukiki kuya eka ntiko lowu nga cinciki loko kungase hlayiwa.

2. Matimba ya ku hlangana: .

   Eka Teflon tape, matimba ya cohesive ya tiveka hi matimba yo khoma ya mahiselo yale henhla (shear adhesion failure temperature kumbe shear holding time). Xikambelo xitala ku endliwa eka 180 °C ehansi ka ndzhwalo wa 1 kg, ku rhekhoda nkarhi kufikela loko adhesive layer yi rhetela kutani yi tsandzeka. Nhlayo leyi yikombisa hiku kongoma vuswikoti bya adhesive layer byo lwisana na ku khuluka naku avana.

II. Ku Fambisana ka Nhlayo Exikarhi ka Xiphemu xa Gel na Matimba ya Nhlanganiso

1. Ehansi ka nhlayo ya nkoka (gel fraction < 60%):

   Endlelo leri a ri si vumba netiweke leyi khulukaka; leyara yo namarhela yitshama yiri eka xiyimo xa viscous-flow, laha matimba yo khoma lawa ya tshinelaka eka zero naswona kungari na matimba yo hlanganisa lawa ya tirhaka.

2. Nhlayo leyi tirhaka (60%–85%): .

   Ku hundza eka ndzhawu ya nkoka, density ya elastic chain leyi tirhaka yi tlakuka swinene na xiphemu xa gel, naswona matimba ya cohesive ya kula hi exponential kumbe ku landzelela nawu wa matimba yale henhla. Ku engetela xiphemu xa gel kusuka eka 60% kuya eka 70% swinga tlakusa nkarhi wo khoma mahiselo yale henhla kusuka eka timinete kuya eka tiawara; kusuka eka 70% kuya eka 80%, matimba yo khoma yanga tlakuka hi minkarhi yo engetelela ya 3 kuya eka 10. Mode ya ku tsandzeka hakatsongo-tsongo yi cinca ku suka eka ku tsandzeka lokukulu loku hlanganeke ku ya eka ku tsandzeka loku pfanganisiweke.

3. Nhlayo ya le henhla ya crosslinking (> 85%): .

   Ku engeteleka ka matimba ya ku hlangana ku hunguta rivilo. Ku tlakusa xiphemu xa gel kusuka eka 85% kuya eka 95% swiendla leswaku kuva na nkarhi wo khoma hi 20%–50% ntsena, kambe tack (initial adhesion) yihunguteka swinene hikokwalaho ka ku famba famba ka molecular chain loku siveleriweke. Loko xiphemu xa gel xi tlula 95%, leyara ya namarheta yi tshinelela xiyimo xa pure elastomer, naswona swivumbeko swa namarheta leswi twaka ntshikelelo hi xiviri swa lahleka.

III. Modele wa Semi-Empirical na Data ya Ntolovelo

Tani hilaha swi katsakanyiweke hakona hi vaendli va malapi ya mahiselo yale henhla ya Jiangsu Teflon, vuxaka bya empirical exikarhi ka nkarhi wo khoma shear (t_shear) na xiphemu xa gel (g) byi nga kombisiwa tani hi:

lg(t_shear) = A + B · g (na B kwalomu ka 0.1–0.2), leswi kombisaka ku titshega ka xikombiso. Mimpimo ya A na B yiya hi MQ resin ratio, ku enta ka adhesive layer, na mahiselo ya xikambelo.

Data leyi tolovelekeke leyi fambelanaka (180 °C static shear, normalized kuya eka nkarhi wo khoma wa 1 eka 65% gel fraction):

| Xiphemu xa Gel | Nkarhi wo Khoma wa Xixaka | Mode yo tsandzeka |

|---------------|

| 55% wa vanhu | < 0.1 | 100% ku tsandzeka ka ku hlangana |

| 65% wa vanhu | 1 | ~80% ku tsandzeka ka ku hlangana |

| 75% wa vanhu | 8–15 | Ku tsandzeka loku pfanganisiweke |

| 85% wa vanhu | 50–100 wa switlhokovetselo | Masalela nyana |

| 92% wa vanhu | 150–200 (ekusuhi na ku tala) | Ku tsandzeka ka vuhlanganisi byo basa |

 

Switikomba leswaku eka 60%–90% range, ku tlakuka kun’wana na kun’wana ka 5 percentage-point eka gel fraction swinga endla leswaku kuva na ku tlakuka ka multiple-fold eka high-temperature cohesive strength.

IV. Maendlelo ya Vulawuri eka Vumaki bya Tithepi ta Teflon

1. Nxaxamelo wa xiphemu xa gel lexi kongomisiweke:

   Eka ti general-purpose heat-resistant winding tapes kusuka eka vaendli va malapi ya mahiselo yale henhla ya Jiangsu Teflon, xiphemu xa gel lexi ringanyetiwaka i 75%–85%, ku ringanisela tack na cohesion. Eka ti anti-stick conveyor belts ta mahiselo yale henhla (leyi nga ehansi ka ku layicha nkarhi woleha eka 200–260 °C), xiphemu xa gel xifanele kufika eka 85%–93% ku sivela masalela ya adhesive lawa ya vangiwaka hiku avana loku hlanganeke ka leyara ya adhesive.

2. Swilaveko swa ku fambisana ka vuhlanganisi:

   Vuandlalo bya PTFE bya Teflon high-temperature tape byina eneji yale hansi swinene yale henhla; hikokwalaho, matimba yo hlanganisa ya leyara yo namarhela ya fanele ku va ehenhla ku tlula matimba ya ku namarhela ka interfacial; handle ka sweswo, ku tsandzeka ka ku hlangana ku ta humelela ehansi ka ntshikilelo. Loko xiphemu xa gel xi tlula 93%, leyara ya adhesive yiva yi tiya, leswi hungutaka ku tsakama xikan’we naku fambisana na substrate ya PTFE, leswinga endla leswaku kuva na ku tlakuka ka makumu. Eka vuhumelerisi, swina nkoka ku lawula kahle mahiselo ya crosslinking, nkarhi, na mpimo wa catalyst ku khiya xiphemu xa gel endzeni ka ndzhawu leyi kongomisiweke, ku fikelela ku cinca loku tshembekaka kusuka eka ku tsandzeka ka cohesive kuya eka ku tsandzeka ka interfacial.

Rungula leri nga laha henhla ri nyikiwile hi Jiangsu Okai Thekinoloji ya Switirhisiwa Leswintshwa Co., Ltd.

Loko u lava ku dyondza swo tala hi vuxokoxoko bya swihlawulekisi, swiyimo swa ku tirhisiwa, na tindlela to endla hi ku landza swilaveko swa switirhisiwa swa hina hinkwaswo—ku katsa na malapi ya Teflon ya mahiselo ya le henhla, tithepi ta mahiselo ya le henhla ya Teflon, mabandhi ya mesh ya Teflon ya mahiselo ya le henhla, mabandhi lama nga riki na swinamarheti lama nga riki na swirhabyani ya ti laminators, malapi ya PTFE ya tlhelo rin’we, conveyor ya mahiselo ya le henhla mabandhi, malapi ya fiberglass lama hisaka swinene ni swin’wana—hi kombela u ntshunxeka ku hi tihlanganisa hi ku tirhisa leswi landzelaka:

Fonela riqingho ra hina ra vukorhokeri:

- Nkulukumba Guo: 18944819998

- Nkulukumba Liu: 13705266308

Minkarhi hinkwayo hi seketela filosofi ya vukorhokeri ya xiphurofexinali na leyi fambiwaka hi vutshembeki, naswona hi tinyiketerile ku ku nyika swintshuxo swa xiyimo xin’we na vukorhokeri byo nyikela nyingiso!