Dab tsi yog qhov kev sib txuas lus ntau ntawm cov gel feem Performance index ntawm silicone siab-rhiab nplaum nplaum thiab lub zog cohesive ntawm cov nplaum txheej?

I. Kev txhais thiab ntsuas cov txheej txheem ntawm cov ntsuas

1. Gel feem:

   Cov gel feem yog hais txog qhov feem pua ​​​​ntawm cov kev sib txuas sib txuas hauv lub silicone siab-rhiab nplaum nplaum coated rau Teflon high-temperature daim kab xev uas yog insoluble nyob rau hauv zoo solvents (xws li toluene). Cov txheej txheem ntsuas suav nrog qhwv cov ntaub nplaum ntshiab rau hauv cov ntxaij lim dej, muab rho tawm hauv Soxhlet extractor rau 24 teev, thiab tom qab ntawd ziab cov khoom seem tsis txaus rau qhov hnyav ua ntej xam.

2. Cohesive zog:

   Nyob rau hauv Teflon daim kab xev, cohesive zog yog yus muaj los ntawm high-temperature tuav lub hwj chim (shear adhesion tsis ua hauj lwm kub los yog shear tuav lub sij hawm). Qhov kev ntsuam xyuas feem ntau yog ua nyob rau ntawm 180 ° C hauv qab 1 kg load, sau lub sijhawm kom txog thaum cov nplaum txheej plam lossis ua tsis tiav. Tus nqi no ncaj qha qhia txog cov nplaum txheej lub peev xwm los tiv thaiv kev ntws thiab kev sib cais.

II. Quantitative Correspondence Ntawm Gel Fraction thiab Cohesive Strength

1. Hauv qab qhov tseem ceeb (gel feem <60%):

   Lub kaw lus tseem tsis tau tsim ib lub network percolating; cov nplaum txheej tseem nyob rau hauv lub xeev khov-ntws, nrog tuav lub zog mus zero thiab tsis muaj zog cohesive.

2. Kev siv ntau yam (60%–85%):

   Beyond the critical point, the effective elastic chain density increases sharply with the gel fraction, and cohesive strength grows exponentially or following a high-power law. Ua kom cov gel feem ntau los ntawm 60% mus rau 70% tuaj yeem nce qhov kub ntawm lub sijhawm tuav ntawm feeb mus rau teev; los ntawm 70% mus rau 80%, lub zog tuav tuaj yeem nce ntxiv los ntawm 3 mus rau 10 zaug. Hom tsis ua hauj lwm maj mam hloov los ntawm kev sib koom ua ke tsis zoo mus rau kev ua tsis tiav.

3. High crosslinking range (> 85%):

   Qhov nce ntawm cohesive zog slows down. Nce cov gel feem ntawm 85% mus rau 95% nce tuav lub sij hawm los ntawm tsuas yog 20% ​​-50%, tab sis tack (thawj adhesion) poob loj vim yog txwv molecular saw txav. Thaum cov gel feem ntau tshaj 95%, cov nplaum txheej mus txog lub xeev elastomer ntshiab, thiab cov khoom siv nplaum nplaum yog qhov tseem ceeb poob.

III. Semi-Empirical Model thiab cov ntaub ntawv raug

Raws li cov ntsiab lus los ntawm Jiangsu Teflon high-temperature npuag manufacturers, kev sib raug zoo ntawm kev tuav lub sij hawm (t_shear) thiab gel feem (g) tuaj yeem qhia tau tias:

lg(t_shear) = A + B · g (nrog B kwv yees li 0.1–0.2), qhia txog qhov kev cia siab ntawm exponential. Qhov tseem ceeb ntawm A thiab B yog nyob ntawm MQ resin piv, nplaum txheej thickness, thiab ntsuas kub.

Cov ntaub ntawv sib xws (180 ° C static shear, normalized rau lub sijhawm tuav ntawm 1 ntawm 65% gel feem):

| Gel Fraction | Kwv tij tuav sij hawm | Hom tsis ua hauj lwm |

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

| 55% | <0.1 | 100% cohesive tsis ua hauj lwm |

| 65% | 1 | ~80% cohesive tsis ua hauj lwm |

| 75% | 8–15 | Mixed tsis ua hauj lwm |

| 85% | 50–100 | Me ntsis residue |

| 92% | 150–200 (ze saturation) | Ntshiab interfacial tsis ua hauj lwm |

 

Nws pom tseeb tias nyob rau hauv 60% -90% ntau, txhua 5 feem pua ​​​​ntawm cov ntsiab lus nce hauv gel feem tuaj yeem ua rau muaj ntau qhov sib npaug ntawm qhov kub thiab txias cohesive zog.

IV. Tswj cov tswv yim hauv Teflon daim kab xev Manufacturing

1. Lub hom phiaj gel feem ntau:

   Rau lub hom phiaj ntawm cov cua sov-resistant winding tapes los ntawm Jiangsu Teflon high-temperature npuag manufacturers, qhov pom zoo gel feem yog 75% -85%, ntsuas tack thiab cohesion. Rau qhov kub-kub los tiv thaiv-stick conveyor txoj siv sia (yuav tsum tau thauj khoom mus sij hawm ntev ntawm 200-260 ° C), cov gel feem yuav tsum ncav cuag 85% -93% txhawm rau tiv thaiv cov nplaum seem los ntawm kev sib cais ntawm cov nplaum nplaum.

2. Interface txuam cov yuav tsum tau:

   PTFE nto ntawm Teflon high-temperature daim kab xev muaj tsis tshua muaj zog nto; Yog li ntawd, lub zog cohesive ntawm cov nplaum txheej yuav tsum siab dua li qhov sib txuam adhesion zog; txwv tsis pub, cohesive tsis ua hauj lwm yuav tshwm sim nyob rau hauv kev ntxhov siab. Yog hais tias cov gel feem ntau tshaj 93%, cov nplaum txheej yuav nruj, txo cov ntub dej thiab ua kom haum rau PTFE substrate, uas yuav ua rau ntug nqa. In production, it is essential to precisely control crosslinking temperature, time, and catalyst dosage to lock the gel fraction within the target range, achieving a reliable transition from cohesive failure to interfacial failure.

Cov ntaub ntawv saum toj no yog muab los ntawm Jiangsu Okai Tshiab Khoom Siv Technology Co., Ltd.

Yog tias koj xav paub ntau ntxiv txog cov ncauj lus kom ntxaws, daim ntawv thov scenarios, thiab cov kev xaiv kho kom haum rau peb cov khoom siv tag nrho-xws li Teflon high-temperature fabrics, Teflon high-temperature tapes, Teflon high-temperature mesh bets, adhesive-free seamless bets for laminators, single-sided-high-temperature fabrics, high-temperature PTFE fabrics, fabrics, thiab ntau dua - thov koj xav tiv tauj peb los ntawm cov hauv qab no:

Hu rau peb qhov kev pabcuam hotline:

- Mr. Guo: 18944819998

- Mr. Liu: 13705266308

Peb ib txwm txhawb nqa kev tshaj lij thiab kev ncaj ncees-tsav kev pabcuam lub tswv yim, thiab mob siab rau muab kev daws teeb meem thiab kev pabcuam rau koj!