Ichi chinyorwa chinovhara maitiro ekufananidza kumhanyisa muchina wekumhanyisa uye kureba kweovheni kuti ive nechokwadi chekuti organosilicone inonamira inosvika kune chinangwa chekurapa degree repamusoro-tembiricha yePTFE tepi. Musimboti wekufananidza: nguva yese yekugara t_total = hurefu hweovheni hunoshanda L ÷ mutsara wekumhanyisa v haifanirwe kunge iri pasi penguva shoma inodiwa yekurapa. Wana maitiro ekurapa kuburikidza neDSC kana adhesive kurapa bvunzo inomisikidza 'tembiricha - shoma yekurapa nguva' hukama. Yakaenzana cumulative yekurapa modhi: patsanura hovhoni muzvikamu, verenga ti=Li/v uye tcure(Ti), simbisa ∑(ti/tcure(Ti)) ≥1. Maitiro ekuverengera: isa tembiricha nzvimbo dzine urefu Li uye tembiricha Ti; seta mutsara wekumhanyisa v, kuverenga nguva yekugara yenzvimbo yega yega uye reshiyo yemupiro; iterate kusvika yakazara ≥1 (safety margin 1.1-1.2 yakakurudzirwa).

Ichi chinyorwa chinovhara nzira dzekudzora crystallinity yePTFE coating paTeflon yepamusoro-tembiricha jira. Kudzimisa mwero wekutonhodza wakanyanya uye unoshanda: Kukurumidza kutonhora (kudzima) kuburikidza nemhepo inotonhora maketeni, roller yekutonhodza kana matangi emvura - cheni dzemamorekuru dzinoomesa chando isati yarairwa, ichigadzira tukristaro tusina kukwana; kukoira kwakapfava, kuomarara nekuita kwakagadziridzwa kusiri kwetsvimbo, kuderedzwa zvishoma kuomarara / kusapfeka. Kutonhora zvishoma nezvishoma (annealing) kuburikidza nechikamu chekuchengetedza kupisa pa10-50 ° C / h kana kutonhora kwechoto - cheni dzemamorekuru dzinoronga zvizere kuita maspherulites makuru akazara; Coating ine kuomarara kwakanyanya, yakasarudzika kupfeka kuramba, yakagadzikana zviyero, kuderedzwa kuchinjika uye kuwedzera brittleness.

Ichi chinyorwa chinovhara kushandiswa kweTeflon yepamusoro-tembiricha jira mune inopisa-mhepo inotenderera sintering mavira. Zvinogoneka: inoshandiswa senge isina-tsvimbo cushion pamabhandi mesh kana matireyi kana tembiricha yechoto ≤260 ° C (yakaderera-kupisa kuomesa, binder kubviswa, slurry kurapa) - inovandudza dhizaini uye kunhonga kugona. Zvakanyanya kurambidzwa panguva dzepakati/pamusoro tembiricha (300-950°C) — PTFE inoora ichiburitsa chepfu HF uye perfluoroisobutylene, midziyo inoora uye ichikonzera chepfu inouraya. Nheyo yekuchengetedza: kana tembiricha yevira isina kujeka kana isingakwanise kuvimbiswa pazasi 260 ° C, usashandise. Zvinhu zvakakosha: kuenderera mberi kwebasa -70 ° C kusvika 260 ° C, kwenguva pfupi 300 ° C; yakanyanyisa isina-tsvimbo uye inertness yemakemikari; yakanakisa magetsi ekudzivirira; kukweshana kwakaderera (~ 0.04); fiberglass base inopa yakakwira tensile simba.

Ichi chinyorwa chinofananidza mutsauko pakati pe infrared radiation kudziyisa uye kupisa-mhepo kutenderera kudziyisa nzira dzekurapa pane zvakachinjika chimiro kufanana kwesilicone adhesive layer. Maitiro ekutamisa kupisa: mhepo inopisa inotsamira pane convection-conduction nekudzika kwekushisa kukwira, diki mukati / kunze kwekushisa kusiyana; IR ine kudzika kushoma kwekupinda nekunyura kwakasimba kwepasi (makumi kusvika kumazana emamicrometer) ichigadzira mawere-kusvika-mukati gradient. Mhedzisiro pakufanana kwecrosslink: mhepo inopisa inoita kuti synchronous kurapa mukati nekunze neuniform crosslink density; IR inokonzeresa kuti nzvimbo yepasi igadzire 'ganda firimu' rakakora iro rinotadzisa kupisa kupisa uye kufamba kwemukati cheni, zvichiita kuti crosslink density ichidzike kubva pamusoro kuenda mukati.

Ichi chinyorwa chinobata misiyano pakati pePTFE emulsions inogadzirwa nekumisa polymerization vs dispersion polymerization. Kujekesa: kumiswa kwepolymerization hakugone kuburitsa zvakananga PTFE emulsion; yechokwadi PTFE emulsion inouya chete kubva kupararira kwepolymerization. 'Suspension-method emulsion' inonyatso kumiswa kwevhu kumiswa-polymerized resin micropowders. Dispersion polymerization (primary emulsion): spherical particles (0.1-0.3μm, yakamanikana kugovera), yakagadzikana ne perfluorinated surfactants, yakanyanya kukwira molecular uremu (> 94% crystallinity), yakasimba fibrillation, inoda 380 ° C sintering kuti iite inoenderera yakaoma firimu.

Ichi chinyorwa chinobata maitiro ekufananidza tembiricha yekuora uye hafu yehupenyu hweperoxide crosslinking agents (BPO neDCP) nehwindo rekurapa rekuita tepi yeTeflon. Core data: BPO - 1-min hafu yeupenyu pa ~ 131 ° C, 1-hr pa ~ 92 ° C, 10-hr pa ~ 72 ° C; DCP - 1-min pa ~171°C, 1-awa pa ~135°C, 10-awa pa ~115°C. Kufananidza logic: adhesive inoda 97-99% crosslinking = 5-7 hafu-upenyu; kuporesa nguva = 5-7 × hafu yeupenyu pane chinangwa chekushisa. Kumashure-karukureta tembiricha kubva kugadzira mutsara yekugara nguva kana kumashure-karukureta nguva kubva pakakwirira inobvumirwa tembiricha.

Ichi chinyorwa chinovhara yakajairika mutsara wekumhanyisa renji yePTFE yakakwirira-tembiricha yejira impregnation yekugadzira mutsara. Kumhanya kwakajairika: 2-15 m / min, yakagadzikana yekushanda yakaenzana 3-8 m / min, micheka yakaonda / mitsetse yakakwira kusvika 10-15 m / min. Zvipingamupinyi kubva pakupinzwa kwemukati: jira rinofanira kunge rakazara zvakakwana nePTFE emulsion mufiber bundle mukati - yakanyanya kumhanya inokonzera kusakwana kupindira, resin nzara uye yakaoma fibers; emulsion viscosity, solids concentration, machira akarukwa density zvese zvinodzikisira mwero wekupinda, zvinoda kunonoka kumhanya kwemachira akakora/akakora. Kupfekedza kunopfuura: akawanda anopfuura (2-6+) anodiwa kune dense chirema-chisina coating; yekutanga kupfuura inononoka yekumisikidza, kunotevera kupasa kunogona kuwedzerwa zvine mwero.

Ichi chinyorwa chinofananidza mutsauko pakati pe infrared radiation kudziyisa uye kupisa-mhepo kutenderera kudziyisa pane yakachinjika chimiro kufanana kwesilicon adhesive layer. Maitiro ekutamisa kupisa: mhepo inopisa-inofambisa, yakapfava uye inofambira mberi, ichigadzira mwero tembiricha gradient; IR imwaranzi-yekunyudza nekunyura kwepamusoro (micrometers kusvika mamilimita) ichigadzira mawere-kusvika-mukati gradient. Mhedzisiro pacrosslink density kugovera: kupisa-mhepo inobvumira mukati nekunze zvikamu kupinda vulcanization tembiricha siyana panguva imwe chete, ichipa yunifomu crosslink density pamwe ukobvu; IR inokonzeresa kuti ganda repamusoro riporese nekukasira kuumba ganda rakakora izvo zvinotadzisa kupisa kupisa, zvichikonzera kupinza kwakapinza kweiyo crosslink density kuderera kubva pamusoro mukati.

Ichi chinyorwa chinovhara zvesilica zvemukati uye mashandisirwo emhando yepamusoro-silica girazi fiber jira. Silica content specification: core indicator is SiO₂ ≥96% (standard 96-98%, premium grade> 99% kuburikidza neacid leaching uye sintering, ichiswedera yakachena quartz fiber). Kugadzira: E-girazi jira rinopinda inopisa acid leaching yekunyungudutsa zvisiri-silica components (boron oxide, sodium oxide), kugadzira porous high-silica skeleton, yobva yanyudzwa kuitira densification. Core zvakanakira: kuenderera sevhisi pa 900 ° C mu oxidizing atmospheres, kwenguva pfupi pamusoro pe 1200 ° C, kupfava nzvimbo pedyo ne1700 ° C; kugadzikana kwemakemikari kunopesana neakawanda acids / alkali kunze kweHF uye inopisa phosphoric acid; yakaderera dielectric inogara uye yakatsiga insulation pakupisa kwakanyanya.

Ichi chinyorwa chinotsanangura microstructural maitiro eTeflon high-temperature jira. Substrate skeleton: girazi fiber weaving texture mu plain/twill weaves ane high porosity (micron-scale pores mukati me fiber bundles uye at warp-weft nodes) inopa nzvimbo yePTFE impregnation. Coating morphology: yakazara impregnation encapsulation inogadzira 'yakasimbiswa kongiri' chimiro uko magirazi fibers ari kusimbisa chikamu, PTFE inoenderera matrix; pamusoro nodular microstructure yemanodule (particles) akabatanidzwa nefibrils yakanaka yakagadzirwa panguva yekupisa; inoenderera mberi dense ganda layer (anoverengeka kusvika kumakumi emakironi akakora) yePTFE yakachena sekiyi chipingamupinyi chemakemikari inertness, isiri-tsvimbo, uye magetsi ekudzivirira.