Gemeili Tech cov hniav ntxuav hniav dawb siv cov kua silicone roj hmab molding thev naus laus zis.Liquid Silicone Rubber (LSR) yog qhov siab -kev ua tau zoo, ob-ib platinum- kho elastomer muaj npe nrov rau nws qhov tshwj xeeb ua ke ntawm cov khoom, ua rau nws yog ib qho khoom ntawm kev xaiv rau kev thov kev thov thoob plaws ntau hom kev lag luam.
Silicone Raw Khoom
Kev faib tawm ntawm silicone
Qhov sib txawv ntawm cov kua silicone thiab cov khoom silicone
Qhov tsos:
- Silicone kua: Nws yog kua thiab muaj fluidity ua ntej kho;
- Khoom silicone: Nws yog nyob rau hauv ib tug khoom lub xeev thiab tsis muaj fluidity.
Daim ntawv thov:
- Silicone kua: Siv dav hauv cov khoom lag luam, khoom siv hauv tsev, khoom siv kho mob, thiab khoom noj khoom haus, nws tuaj yeem tiv tauj tib neeg lub cev thiab zaub mov;
- Cov khoom siv silicone: feem ntau siv hauv cov khoom lag luam thiab cov khoom siv niaj hnub.
Environmental kev nyab xeeb:
- Silicone kua: platinum vulcanized, tsis yog - lom thiab tsis muaj ntxhiab, thiab cov zaub mov muaj kev nyab xeeb heev - cov khoom qib.
- Khoom silicone: vulcanized nrog peroxide compounds, nrog cov ntxhiab tsw ntawm vulcanizing agents los yog masking agents, thiab yog ib tug environmentally friendly khoom.
Hom kev tsim khoom:
- Silicone kua: Ua tiav kev tsim khoom; luv luv ntau lawm voj voog; cov ntaub ntawv yuav tsum tsis muaj ua ntej - ua, ua kom muaj txiaj ntsig zoo thiab ua haujlwm - txuag; haum rau dual - xim txhaj tshuaj molding.
- Khoom silicone: Nws yuav tsum muaj cov txheej txheem xws li batching, sib tov roj hmab, txiav cov roj hmab, thiab kev pub mis.
Liquid Silicone Roj Hmab (LSR)
- Cov kua roj hmab silicone yog piv rau cov khoom siab siab -kub vulcanized silicone roj hmab. Nws yog kua ua ntej kho thiab dhau los ua elastomer tom qab kho.
- LSR feem ntau yog tsim los ntawm lub hauv paus roj hmab los ntawm GML Tech (polymethyl vinyl siloxane raw roj hmab) thiab crosslinking tus neeg sawv cev (polymethyl hydrogen siloxane) nyob rau hauv lub zog ntawm ib tug catalyst ( complexes ntawm kev hloov cov hlau xws li platinum, npib tsib xee, rhodium, thiab lwm yam), uas ua rau ib tug elastomer nrog ib tug network qauv.
- Nyob ntawm cov ntawv thov sib txawv, lwm cov khoom ntim xws li fumed lossis precipitated silica, hlau oxide, titanium dioxide, thiab carbon dub tuaj yeem ntxiv. Txhawm rau tsim cov pob tshab LSR, silicone resin kuj tuaj yeem siv los ua cov muab tub lim.
- Ob lub Cheebtsam: Cheebtsam A (muaj platinum catalyst) thiab Cheebtsam B (muaj tus neeg sawv cev crosslinking)
Cov tshuaj tiv thaiv ntxiv ntawm LSR
- Catalyst: Complexes ntawm kev hloov pauv hlau nyob rau hauv pawg XIII ntawm lub sij hawm lub sij hawm tag nrho cov qhia ntxiv catalysis, tab sis platinum (Pt) thiab nws cov tebchaw thiab complexes feem ntau siv nyob rau hauv LSR.
- Platinum, raws li catalyst, feem ntau yog siv nyob rau hauv tshuaj, roj av, thiab kev lag luam tshuaj tiv thaiv txheej txheem
Vulcanization
Qhov tseem ceeb ntawm kev vulcanization yuav tsum yog "crosslinking" lossis "bridging", uas yog hais txog cov txheej txheem ntawm kev tsim lub network-zoo li polymer los ntawm cov kab hluav taws xob los ntawm crosslinking. Lub cev, nws yog cov txheej txheem ntawm kev hloov cov roj hmab yas rau hauv cov roj hmab elastic lossis tawv roj hmab. Lub ntsiab lus ntawm "vulcanization" tsis tsuas yog suav nrog cov txheej txheem crosslinking tiag tiag tab sis kuj suav nrog cov txheej txheem siv los tsim crosslinking.
Cov txheej txheem cuam tshuam nrog cov roj hmab macromolecules ua rau muaj tshuaj tiv thaiv nrog tus neeg sawv cev crosslinking sulfur thaum rhuab, ua rau peb -sib nqus network qauv los ntawm crosslinking. Cov roj hmab tom qab vulcanization yog hu ua vulcanized roj hmab.
Vulcanization yog txheej txheem kawg hauv kev ua cov roj hmab, uas ua rau cov khoom siv roj hmab ua tiav thiab ua tiav.
Nyob rau hauv lub network qauv ntawm roj hmab, qhov ceev ntawm sulfur cross- txuas cov ntawv cog lus (qhov twg tus naj npawb ntawm sulfur atoms n yog ntau dua los yog sib npaug rau 1; hos tus naj npawb ntawm uncross -linked sulfur atoms yog Sx los yog Sy) txiav txim siab qib ntawm vulcanization ntawm roj hmab. Nyob rau hauv cov txheej txheem, tom kawg yog txiav txim raws li macroscopic lub cev thiab mechanical zog ntawm cov roj hmab compound los yog hloov nyob rau hauv roj hmab viscosity.
LSR Performance Yam ntxwv
Tsis yog - lom, haum rau kev kho mob thiab zaub mov daim ntawv thov:
- Nws tsis yog- lom rau tib neeg, tsis muaj ntxhiab tsw, thiab tsis qab;
- Ib puag ncig kev nyab xeeb thiab degradability;
- Nws tsis tsim cov tshuaj lom lossis muaj teeb meem thaum combustion (cov khoom siv hluav taws xob tseem ceeb yog SiO2);
Tear resistance, resilience, tsis kam mus daj, dej tsis kam thiab waterproofing;
Huab cua tsis kam: Vim lub zog siab ntawm Si-O daim ntawv cog lus, uas siab dua lub zog ntawm hluav taws xob ultraviolet, nws tsis yooj yim decomposed los ntawm ultraviolet rays thiab ozone. Yog li ntawd, nws muaj kev tiv thaiv zoo rau ultraviolet rays, ozone, thiab kev laus (cov khoom siv xws li coatings, kev tsim kho plastics, cov khoom siv roj hmab, thiab lwm yam, thaum siv sab nraum zoov thiab raug rau kev ntsuas huab cua, xws li kev puas tsuaj los ntawm lub teeb, kub, txias, cua, nag, thiab cov kab mob, lawv kuj hu ua huab cua tsis kam).
Qhov kub thiab txias tsis kam: Cov cua sov thiab txias ua haujlwm zoo, tswj kom zoo elasticity txawm tias tom qab ntev - siv nyob rau hauv qhov kub ntawm -50℃mus rau 200 degree, tsis muaj melting lossis embrittlement (cov khoom tshwj xeeb tuaj yeem tiv taus kub txog -110 degree);
Hluav taws xob rwb thaiv tsev kev ua tau zoo: Cov hluav taws xob rwb thaiv tsev zoo heev, nrog nws cov dielectric poob, qhov hluav taws xob tsis kam, arc tsis kam, corona tiv thaiv, thiab kev tiv thaiv qib ntawm qhov zoo tshaj plaws hauv cov ntaub ntawv insulating, thiab nws cov hluav taws xob ua tau zoo cuam tshuam los ntawm qhov kub thiab qhov zaus;
Physiological inertness: Polysiloxane tebchaw yog ib yam tsawg tshaj plaws reactive tebchaw paub. Lawv muaj peev xwm tiv taus cov kab mob lom neeg laus, tsis ua rau muaj kev tsis lees paub hauv cov tsiaj lub cev, thiab muaj cov khoom zoo anticoagulant.
Kev ua pa: Silicone zaj duab xis nthuav tawm ua pa zoo dua piv rau cov roj hmab zoo tib yam thiab yas waxed films;
Ua ntej kho, LSR nthuav tawm cov viscosity tsawg, kho sai, shear thinning, thiab siab coefficient ntawm thermal expansion, ua rau nws haum rau huab hwm coj, ceev, thiab rov ua dua txhua yam los ntawm kev txhaj tshuaj molding.
Yuav tsum tau txuas ntxiv ...