Kupfekedza kufanana panguva yePTFE emulsion impregnation ye fiberglass jira ndiyo nzira yehupenyu yemhando yechigadzirwa. Kusaenzana kupfekedza kunokonzera: kutadza kwetsvimbo (kunamira panzvimbo dzakatetepa), kushaya simba kwemuchina (kunetsekana, kubvaruka), kusagadzikana kwemagetsi (kuparara kwemagetsi kunodonha kusvika 1/10), kupinda kwemakemikari (pinhole corrosion), nyaya dzedimensional (warpage), uye kukanganisa kwekugadzirisa (bhandi kudzungaira, kusiyana kwakakora). Uniform coating inoda kunyatso kudzora emulsion viscosity, yakasimba yemukati, machira kudhonzerana, kusvina mapundu, uye akawanda-zone drying / sintering profiles.

PTFE high-temperature jira ine coefficient of thermal expansion (CTE) ye30-60 ppm/°C (warp/weft) - yakakwirira kudarika fiberglass chete asi yakaderera zvikuru pane yakachena PTFE (100-200 ppm/°C). PTFE inongoerekana yachinja vhoriyamu (1-2%) pa19°C uye 30°C shanduko yechikamu. Kuti udzivise kuputika, kubvarura, uye kudonhedza: dhizaini yedhizaini yekuwedzera mahara, dzivirira kushushikana kuburikidza nechikamu chekuchinja tembiricha, shandisa otomatiki tensioner pamabhandi ekutakura, uye shandisa anti-buckling overlap dhizaini. Kugara uchiongorora kutonhora kuyerera kwakakosha.

PTFE high-temperature machira ekubikisa mabheti anopa mana akakosha mabhenefiti: kusashanda kwetsvimbo (hapana mafuta kana hupfu hunodiwa, mabheki akapfava anoburitswa zvakachena), tembiricha yakakura (-70 ° C kusvika 260 ° C, yakachengeteka muhovhoni kusvika mufiriji), kushandiswazve (zviuru zvemajini, zviri nyore kuchenesa), uye kunyange kupisa conduction (kunodzivirira kupisa, kudzikamisa kusviba). Chikafu-giredhi FDA inoenderana, ivo vanobuda kunze bepa rematehwe uye kupfuura e-silicone mats ane zvirinani kutamisa kupisa uye kunaka kwepamusoro magadzirirwo.

PTFE high-temperature jira yakakosha muindasitiri yenguo interlining. Zvishandiso zvakakosha: mabhandi asingagumi ekutakura mabhandi ekuenderera mberi kusanganisa michina (inodzivirira inopisa inonyunguduka inonamira, isina kuunyana kuendesa), isina-tsvimbo yekuvharira uye jira repadhi remashina ekupisa (anodzivirira maplatens kubva pakusvibiswa kweanonamatira), mabhandi ekutakura e dot paste/powder coating inlines kuomesa/kunyungudutsa), uye mavhavha eshangu dzesimbi yekutsikirira muenzaniso. Hukobvu hunotangira pa 0.13mm (light padding) kusvika 0.55mm (heavy-duty conveyor belts).

Fiberglass fabric thermal shrinkage ndiyo inonyanya kukonzera PTFE tepi dimensional kusagadzikana. Pa PTFE sintering tembiricha (360-400 ° C), zvakasara zvekuruka kushushikana kunoburitswa. Kana isingadzoreki, jira rinopera; kana ikadziviswa, kushushikana kwakadzikama kunovharirwa mukati, zvichiita kuti gare gare kupera panguva yekunamatira kurapa (150-200 ° C) uye kupera-kushandiswa kupisa. Mhinduro: shandisa pre-heat-set fiberglass ne <0.5% shrinkage pa 400 ° C, kubvisa kushushikana kwakasara kusati kwavhara.

PTFE high-temperature fabric (PTFE-coated fiberglass) inopa yakasarudzika makemikari kuramba, withstanding concentrated acids (kusanganisira aqua regia), alkali yakasimba (pakamuri tembiricha), organic zvinonyungudutsa, uye oxidizing agents. Kunze kwe: simbi yakanyungudutswa yealkali uye yakakwirira-tembiricha halogen makomisheni anorwisa PTFE. Kukuvadzwa kwekuputira kunofumura fiberglass kune hydrofluoric acid uye inopisa yakadzika alkalis. Tembiricha iri pamusoro pe260°C inoderedza kuramba. Kune akawanda emakemikari nharaunda, PTFE jira rinoramba rakagadzikana uye rakavimbika.

PTFE emulsion impregnation yemucheka wefiberglass inoda akasiyana-siyana anobatsira kuti awane yunifomu yekuputira, yakasimba adhesion, uye isina chakaremara nzvimbo. Zvinowedzera zvekuwedzera zvinosanganisira: wetting agents (kuderedza kushushikana kwepasi, kunatsiridza kupinda), thickeners (control viscosity uye coating weight), pH regulators (stabilize emulsion papH 9-10), silane coupling agents (kunamatirisa kugirazi), firimu-forming aids (PFA/FEP ye sintering), inoshanda mafirita (kupfeka mapikisi, mapikisi ekudzivirira), mafiritsi ekudzivirira, mapikisi ekudzivirira, kudzora ganda. (slow drying). Kusarudzwa kunoenderana ne substrate uye kuita zvinodiwa.

Yakawedzerwa fiberglass jira (yakawanda shinda yeshinda) inosiyana zvakanyanya kubva kune yakajairwa fiberglass jira mune yeshinda chimiro. Kuburikidza ne-high-pressure air jet treatment, inoenderera mberi girazi filaments inoparadzaniswa, crimped, uye fluffed kuita voluminous, donje-seshinda. Izvi zvinogadzira jira rakakora, rakapfava nepamusoro pekupisa kwemafuta (akavharirwa mhepo akaturikidzana), kuenderana kuri nani, kusefa kwepamusoro, uye nekunatsiridza kubvarura/kuchinjika kuramba - pamubhadharo wesimba rakaderera zvishoma. Inoshandiswa kune yakakwira-tembiricha gaskets, pombi wraps, mabhegi ekusefa, uye zvisimbiso zveoveni.

PTFE high-temperature fabric (PTFE-coated fiberglass) inenge ine makemikari inert, asi zvimwe zvinhu zvinokonzera kuora mumamiriro ezvinhu chaiwo. Kurwisa kwakananga kwePTFE kunoitika nesimbi yakanyungudutswa yealkali (sodium, potassium), yakasimba fluorinating agents (F₂, ClF₃) pakupisa kwepamusoro, uye alkali yakanyungudutswa yakasimba pamusoro pe300°C. Kuora kusina kunanga kunoitika kana hydrofluoric acid (HF), inopisa yakadzika alkalis, kana inopisa phosphoric acid ikapinda zvakakanganisika zvekupfeka uye kurwisa iyo fiberglass substrate. Nekunyanyisa kemikari sevhisi, shandisa yakachena PTFE firimu isina fiberglass.

PTFE high-temperature jira (PTFE-yakavharwa fiberglass) ine yakanakisa kupisa kuvhunduka kwekudzivirira mukati meyakajairika kushanda kwayo kwe -70°C kusvika 260°C. Inogona kushivirira kukurumidza tembiricha bhasikoro, semuenzaniso, kufamba kubva -50 ° C firiza kuenda 260 ° C inopisa muchina. Magiredhi ePremium anopona nekukasira kutonhora kubva pa260°C kusvika pa10°C mvura. Zvisinei, kuvhundutsa zvinhu kubva tembiricha pamusoro 300°C (padyo PTFE's 327°C melting point) kuchaita nokukurumidza kutsemuka uye delamination. Iyo fiberglass substrate inopa dimensional kugadzikana; iyo PTFE coating ndiyo inomisa chinhu.