Liquid silicone rubber (LSR) hpe foaming agent (hkum hkrang (sh) tsi mawan) hte kayau nna, hka lum ai hte n-gun n rawng ai hku galaw ai aten hta, foaming agent gaw gas byin shangun nna, dai hku nna, langai sha re ai hte n-gun ja ai microcellular foaming structure hpe hpaw ya ai.
1. Raw arung arai ni hpe hkyen lajang ai lam:
San mai ai ntsin silicone rubber (A&B daw) lahkawng hpe lang u. Base rubber compound gaw, garan jaw ai wa a shawng{2}}prepared rai nga ai. Component A hta n-gun n rawng ai lam lawm nna, Component B hta crosslinking agent lawm ai. Hpang jahtum na prut prut ai arung arai a bungli galaw ra ai lam ni hta hkan nna (n-gun, n-gun ja ai, nsam zawn re ai) hta hkan nna, nsam paste, thermal conductive fillers (alumina zawn re ai), shing nrai, wan hkru ai retardants hte kaga additives ni hpe base rubber compound hta bang ra na re. Ndai additives ni hpe Component A (sh) Component B hte maren sha kayau kaya galaw ai.
2. Agent Npawt Nhpang (Foaming agent hpe hpaw shadan dan ai)ndai gaw ahkyak dik htum link rai nga ai. Foaming agent amyu hku nna, madung hku nna hpaji masa lam lahkawng hku garan nna galaw ai:
Process: supercritical COt hpe galai shai shangun ai.: Liquid CO€ hpe katsi ai hte supercritical mungdan de ap nawng da ai arung arai ni hku nna dip sha ai. Metering and injection: Hkum hkrang n-gun ja ai metering metering pump hku nna, supercritical CO kaji kaji langai ngai hpe A n-gun rawng ai silicone rubber a A daw hka lwi ai lam de bang da ai. Static mixing: Component A (s scCO kaji lawm ai) hte Component B hpe static mixer hku lai wa ai shaloi atsawm sha kayau kaya galaw ai. Dai aten hta, scCO kaji gaw, n-gun kaba ai npu hta, rubber compound hta langai sha zawn, langai sha re ai hku garan mat nna,-}hkum langai sha re ai kayau kaya ai lam hpe shabyin ya ai. Ndai lam yawng hpe n-gun kaba ai npu hta tawn da nna CO hpe aten garai n du yang hprawng lawt na matu pat shingdang da ai.
b) Chemical foaming atent:Thermally decomposed lang ai chemical foaming agents ni, ga shadawn, n-gun n rawng ai tsi ni hpe lang u (AC foaming agent). Process: Pre{1}}} foaming agent powder hpe Component A (sh) Component B hte rau shingjawng ai jak langai mi hta maren sha. Dai product hpe n kaja ai{{3} n lawm ai hpe kam na matu, stirring galaw ai shaloi pru wa ai nbung hpe shaw kau na matu, kayau ai hpang vacuum deaeration ra ai.
3.Vulcanization hte foaming:
Hkum hkrang n-gun rawng ai lam: Rubber compound hpe mold cavity kata de bang ngut ai hpang, n-gun hpe shapraw kau nna, dai n-gun hpe shapraw kau nna, rubber compound hta supercritical CO€ hpe lawan ladan n-gun dat nna, bubble nuclei byin pru wa ai. Dai aten hta, nbung laru kaba ai majaw, silicone rubber hta n-gun n rawng ai hte cross{1}}linking n-gun hpe shabyin ya ai, bubble structure hpe pat da ai hte cell ni hpe hpaw ya ai.
Chemical foaming: Mold a n-gun kaba ai majaw, chemical foaming agent hpe hkra machyi shangun ai, gases ni hpe shabyin ya ai (N€, CO kaji zawn re ai). Dai aten hta sha, silicone rubber hpe vulcanized galaw nna, gases ni hpe hpaw da ai rubber network hta shinggrup da nna, cell ni hpe galaw ai.
4. Hkalem hkalau ai lam:vulcanization foaming cycle ngut ai hpang (galaw madang hku nna second shi kaw nna minit law law laman), n-gup hpe hpaw nna, dai hpe shaw kau u. LSR a n-gun n law ai majaw, dai arung arai ni gaw, n-gun n rawng ai sha, n-gun n rawng ai sha, n-gun n rawng ai sha, n-gun n rawng ai.
5. Post{1}} Curing (lahkawng lang na vulcanization)(Post- Curing) foamed products ni hpe demolding galaw ngut ai hpang, 150℃150 daram - 200℃hpe hkying hkum 1-2 daram katsi ai hku nna, wan wut ai shara hta, n-gup magap hta bang ra ai.