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.

Raw material kuchena ndiyo hwaro hwePTFE yakakwirira-tembiricha machira kuita. High-purity PTFE emulsion (hapana simbi ions, hapana yakaderera-molecular-uremu residues) inovimbisa kupisa kupisa (pasina yellowing kusvika ku260 ° C), yakagadzikana isina tsvimbo, uye yakakwirira dielectric simba. Kune fiberglass, alkali-isina E-girazi (Na₂O <0.8%) inochengetedza simba uye kuvhara pakupisa kwakanyanya; yepakati/yakakwirira-alkali girazi inokonzera kuora. Kubviswa kwakazara kweanoruka saizi ejenti kunodzivirira carbonization uye delamination. Kuchena kunobata zvakananga hupenyu hwesevhisi, kutevedza kwegiredhi rekudya, uye kuvimbika kwemagetsi.

Kunyatsoomeswa kwejira refiberglass kwakakosha kune inotevera PTFE coating, resin impregnation, kana lamination. Mishonga mitatu mikuru: kubvisa unyoro pa 105-120 ° C (10-30 min zvichienderana nehuremu), dewaxing / thermal kuchenesa pa 300-450 ° C (LOI <0.1%, kudzivisa> 500 ° C), uye preheating pa 60-100 ° C isati yaputira. Dzora tembiricha yehovhoni kufanana (± 5°C), kumanikidzira kubvisa humidification, uye chengetedza machira ane silane ari pasi pe110°C. Chengetedza machira akaomeswa mumabhegi akavharwa kana makamuri akaoma (<30 ° C, <40% RH).

PTFE high-temperature tepi ine yakanakisa munyu kupfapfaidza kuramba, asi iyo isina simba mapoinzi ndiyo inonamira layer uye fiberglass substrate mipendero. Nzira dzekuongorora: 1000h neutral salt spray (NSS) bvunzo, kuyera peel simba retention (≥80% inodiwa), urema hwekuona (kusimudza, blistering), uye simbi substrate corrosion. Kunzvimbo dzemugungwa uye dzakakwirira-munyu-mhute: shandisa silicone PSA (kwete acrylic), yakanyudzwa zvizere PTFE substrate, chisimbiso mipendero nemamiriro ekunze-resistant sealant, uye shandisa primer panzvimbo dzesimbi.

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 kwakanyanya, uye alkalis akanyunguduka akasimba 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 tepi inorasikirwa nekunamatira mushure mekushandisa kakawanda nekuda kwekusvibiswa kwepamusoro (guruva, silicone mafuta), kusungirirwa kwakabatana kukundikana (kusara), kana kusimba kwe substrate bonding. Mhinduro: high-crosslink silicone PSA (yakaderera kutama, kuenzanisa tack / kubata simba), primer treatment paPTFE substrate, dense fiberglass backing, uye kubata kwakakodzera (nzvimbo dzakachena, ganda rinotonhorera, 180 ° angle). Quantitative test inosimbisa kuvandudzwa.

PTFE high-temperature jira (PTFE-yakavharidzirwa 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.

PTFE high-temperature jira rinoshandiswa zvakanyanya muindasitiri yemakemikari kune zvinomwe zvakakosha zvikumbiro: flange gaskets uye pombi linings (inodzivirira yakasimba acids / alkalis), reactor uye matangi linings (inodzivirira simbi kukora, kuchenesa nyore), mabhegi ekusefa ekuora gasi (kusvika 260 ° C), anti-corrosion yekuwedzera, machira ekuburitsa, majoini ekuburitsa machira. composite molding, uye yemagetsi/thermal insulation wraps. FDA uye UL mamakisi aripo.

PTFE high-temperature tepi yakachengetwa pasi pemamiriro akatarwa (10-25 ° C, 40-70% RH, kure neUV / heavy pressure) ine mararamiro esherufu emwedzi 3-6 (makirasi ekutanga kusvika kumwedzi gumi nemiviri). Key degradation zvikumbaridzo: simba repeel harifanire kudonha pasi pe70% yekutanga kukosha; hapana masara ekunamatira mushure mekubviswa kwekushisa kwepamusoro; hapana carbonization kana kutsemuka pane yakatarwa tembiricha. Kurumidza kutarisa: manyore kusunungura kunzwa, 260 ° C yasara bvunzo, uye lamination shrinkage bvunzo.

PTFE high-temperature fabric (PTFE-coated fiberglass) inopa zvikomborero zvina zvakakosha se-anti-corrosion lining: kemikari inertness (inopesana ne aqua regia, alkalis yakasimba, zvinonyungudutsa), yakawanda yekushisa (-70 ° C kusvika 260 ° C inoenderera mberi, 350 ° C peak), dimensional kugadzikana (<0.5 uye kuchenesa kusinganzwisisike), kudzivirira kwepamusoro-soro, kuchenesa (kureba-kureba). Inoshandiswa mumakemikari mapaipi, desulfurization shongwe, pickling matangi, uye chikafu / mishonga yemishonga. FDA mamakisi aripo.