Chii Chinokonzera Kupwanya muPTFE Impregnation process?

Semunhu ane hunyanzvi anogadzira machira ePTFE akakwira-tembiricha, Jiangsu Aokai New Materials anotsanangura zvikonzero zvekutsemuka mugirazi fiber jira mushure mekupinzwa nePTFE (polytetrafluoroethylene) emulsion. Iyi inyaya yakajairika mukugadzira zvinhu zvakaumbwa, zvinowanzoitika panguva yekuomeswa (kubviswa kwemwando uye ma surfactants) kana kupisa-kupisa sintering (kunyungudutsa PTFE zvimedu kuita firimu rinoenderera).

1. Kusawirirana Kwakanyanya Kwekupisa Kwekuwedzera Coefficients

Ichi ndicho chikonzero chikuru chemuviri.

Pane musiyano mukuru mukupisa kwekuwedzera coefficients pakati pegirazi faibha uye PTFE: mutsara wekuwedzera coefficient yegirazi fiber ingangoita 5×10⁻⁶/℃ , nepo iyo yePTFE ingangoita 100×10⁻⁶/℃ kusvika 200×10⁻⁶ nguva yegirazi/⁻⁶  nguva yegirazi/⁻⁶ nguva/⁶.

Panguva yekutonhodza (kubva patembiricha inonyura ingangoita 380℃–400℃ zvichidzika kusvika pakamuri tembiricha), PTFE inodzikira zvakanyanya kupfuura girazi fiber framework. Sezvo girazi faibha jira rinoita seakaomarara skeleton, PTFE inomanikidzwa panguva yekuderera, ichigadzira yakakura yemukati tensile yekupisa kushushikana. Kana kushushikana uku kunopfuura simba rekusimba rePTFE firimu kana kuti interfacial bonding simba pakati pePTFE negirazi fiber, kuputika kunoitika kusunungura kushushikana.

2. Kudzora Kwakashata Kwekuomesa uye Sintering Maitiro

Kupisa maparamendi echinhu chakapinzwa anokanganisa zvakananga kupaza:

Kunyanya  kukurumidza kupisa mwero : Kunyanya kutenderedza 100 ℃ (kukurumidza vaporization yehunyoro) uye 200 ℃-250 ℃ (kuora kwema surfactants mu emulsion uye crystalline transition zone pamberi pePTFE sintering). Kukurumidza kupisa kunokonzeresa kushushikana kwemukati uye gasi kukanganisa kubva ipapo kuvhuvhuta kwezvinonyungudutsa uye zvinowedzera, zvichikonzera kuputsika kwekuvhara.

·  Kunyanya kukurumidza kutonhora kutonhora : Yakananga kuratidzwa kumhepo yeambient yekukurumidza kutonhora mushure mekunyungudika kunogadzira yakanyanya instanted shrinkage kusagadzikana nekuda kwekusiyana kukuru kwetembiricha, izvo zvinokonzeresa kutsemuka kwenetiweki.

·  Yakanyanya kukwira sintering tembiricha kana yakanyanyisa kureba sintering nguva : Izvi zvinokonzeresa kuderedzwa kwePTFE molecular uremu uye yakawandisa fluidity, zvichiita kuti zvinhu zvive nyore kutsemuka mukushushikana.

3. Nyaya muImpregnation Process uye Emulsion Concentration

Ukobvu, kufanana uye kudzika kwekupinda kweiyo impregnated layer inobata zvakananga kupaza senitivity:

·  Yakanyanya kukora single impregnation layer : Mukutsvaga ukobvu kana kugona kugadzira, yakanyanyisa gobvu yePTFE coating inoiswa mune imwe pass. Panguva yekuomeswa nekunyunguduka, jira rakakora rine nzira refu yekubvisa zvinonyungudutsa uye rinowedzera volumetric shrinkage (PTFE emulsion kazhinji ine yakasimba yemukati inosvika 60%, zvinoreva kuti hunyoro hunosvika makumi mana muzana hunofanira kubviswa), izvo zvinowanzokonzera kutsemuka kwepasi.

Uneven  impregnation : Localized yakawandisa PTFE kuvaka kana kusaenzana emulsion kugovera pajira rejira rinotungamira kune yakadzika shrinkage kushushikana.

·  Kusakwana emulsion penetration : Kana girazi faibha jira risina kubviswa wakisi kana kusabatwa zvakanaka pamusoro, PTFE emulsion inotadza kupinda zvizere mumasumbu efiber uye inongogadzira 'ganda firimu' repamusoro. Iyi firimu ine isina kusimba anchoring ne substrate uye inowanzo bvisa kana kuputika kana yapisa.

4. Substrate-Related Factors

·  Unde-waxed girazi fiber jira : Girazi faibha jira rine saizi ejenti (parafini, epoxy, nezvimwewo) kubva pakuruka. Pasina high-temperature dewaxing kana kemikari kuchenesa kusati kwaiswa, izvi zvinokonzerwa nemagetsi carbonize uye zvinoputika panguva inotevera sintering, inogadzira gasi rinoputika rinoputika kana kuderedza chisungo pakati pePTFE negirazi fiber, zvichiita kuti pave nekutsemuka.

·  Chimiro uye ukobvu hwegirazi faibha jira : Gobvu uye denser girazi faibha jira (senge gobvu satin jira) rinoratidza yakakwirira kuoma uye kuzvidzora kwakasimba paPTFE shrinkage. Zvichakadaro, kudzika kwakadzika pakati pefiber bundles kunowanzo konzera kusagadzikana uye kuputika pamipendero yegroove panguva yekuomesa.

Ruzivo rwuri pamusoro rwunopihwa neJiangsu Aokai New Materials Technology Co., Ltd.

Kuti uwane ruzivo rwakadzama, mamiriro ekushandisa uye zvigadziriso zvakagadziridzwa zvechigadzirwa chedu chizere - zvinosanganisira PTFE yakakwirira-tembiricha jira, PTFE yakakwirira-temperature tepi, PTFE yakakwirira-temperature mesh bhandi, mabhandi asina musono emichina yekubatanidza, jira rimwechete-sided PTFE, yakakwirira-tembiricha isingachinjiki, machira anodzivirira girazi uye mamwe machira ane hukama akasununguka kutibata nesu:

·  Nharembozha yebasa: Mr. Guo: +86 18944819998 Mr. Liu: +86 13705266308

Isu tinogara tichitsigira huzivi hwesevhisi yemhando inodhura-inoshanda, hunyanzvi uye kuvimbika, uye takazvipira kukupa iwe-yekumira mhinduro uye inoteerera sevhisi!