I. Foamed rubber thil siam chungchang tlangpui
Foam rubber products hi physical emaw chemical foaming method hmanga siam niin, rubber chu base material atan hmangin sponge ang chi rubber porous structure products siam a ni. He technology hi thil siamchhuahna industry hrang hrangah hman a ni nasa hle a, motor kawngkhar leh tukverh seal, cushioning pad, building sakna gasket, seismic material, sports protection facilities, etc.-ah te hman a ni nasa hle.
1、Foamed rubber tih concept
Foamed rubber an tih hi rubber foaming technology tia hriat lar a ni bawk a, chu chu rubber enkawl nan foaming agent bik hman a ni a, chutiang chuan rubber hian processing means angin characteristic performance a nei a ni. He technology hi tuna production field-ah hian hman a ni nasa zawk a, tun dinhmunah chuan production hnathawh dan hman tlanglawn ber a ni.
2、Foamed rubber atanga siam thil chi hrang hrang
Tunah hian foamed rubber products hi production field-a hman lar ber pawl a ni a, pores a zirin microporous structure leh porous structure chi hnih ah then theih a ni. Tin, microporous structure hi foaming product hrang hrang leh continuous foaming product hrang hrangah then theih a ni bawk. Rubber raw material a zirin he product ah hian natural rubber foaming products, isoprene foaming products, SBR foaming products, ethylene propylene rubber foaming products, etc. ah then theih a ni.
Pahnihnaah chuan foam rubber products te chu analysis nen
Tunlai khawtlang nunah hian foamed rubber products hi hman a ni nasa hle a, a siam chhuah leh siam chhuah dan leh thermoplastic foaming hian khawvel danglamna a nei a, vulcanization cross-linking speed a nei a, buaina nena inmil turin foaming agent a decomposition speed a nei bawk. Chu chu, rubber material hlawhtling foaming bakah cross-linking speed bakah hian rubber materials vulcanization process leh blowing agent decomposition inkara inzawmna nghet tak a awm tihna a ni a, chu chu principle chu a bulpui berah a inang a, gas expansion wall extension an ni a, a inmil resistance process siam chhuak a ni.
1、Thil pawimawh ber thlan dan
A siam danah chuan, a tlangpuiin thil tum bikte chu scientific rubber taksa hmanrua thlan nan a mamawh a, heng thilte hi thlan chhuahnaah chuan a nem, chakna hniam, natural rubber thil siamte elasticity tha tak, mahse, thil siam mamawh phuhruk turin artificial rubber thenkhat thlan chhuah a ngai bawk. Oil-resistant foam product siamna atan chuan, scientific nitrile rubber tling thlan a ngai bakah, neoprene proportion leh relationship thlirletna atan te, leh special product thenkhat mamawh phuhruk nan pawh, rubber chi hnih emaw a aia tam emaw leh a form pawh i hmang thei bawk.
2、Foaming agent thlan dan
Foaming agent hi foamed rubber siamna zawng zawngah hian link pawimawh ber a ni a, a thlan dan hi hnathawh that leh quality nen a inzawm tlat a ni. A tlangpuiin, foaming products performance tha tak chuan scientific leh reasonable foaming agent a thlang tur a ni a, foaming agent zat, tuna social development mamawh phuhrukna tur method hman a ngai bawk. Tunah hian blowing agent hian organic blowing agent leh inorganic blowing agent pahnih a pai ber a ni. Inorganic blowing agent hian sodium bicarbonate, ammonium bicarbonate, urea, etc. a kawk ber a, heng blowing agents te hian a thatna chu fast decomposition speed leh application ah temperature hniam tak a ni a, theoretically chuan a foaming performance pawh a tha zawk bawk. He technology hmanga gas siam chhuah hi application-ah hian carbon dioxide leh ammonia, etc. a nih ber avangin heng gas te awmna hian rubber structure hian permeability coefficient lian tak a nei a, closed-hole foam rubber siam a harsa a, foam rubber siamchhuahna quality hniam, chakna hniam, shrinkage, deformation awlsam, chuvangin hnathawhnaah a mah chauha hman a awlsam hle a, a tlangpuiin organic angin hman theih a ni foaming agent hman tur a ni.
Tuna kan hnathawh, kan hman tlanglawn foaming agent hian nitrogen dicarbonamide, nitroso, dibenzosulfonyl hydrazide ether, etc... Heng materials te hi a decomposition temperature hmannaah 200 °C vel emaw a aia tam emaw a ni a, a siam chhuah danah pawh auxiliary blowing agent dang, urea, magnesium oxide, zinc oxide, etc. te dah belh a ngai bawk., chuvangin a decomposition nasa takin a tlahniam a, gas siam chhuah thermal decomposition hian nitrogen, carbon dioxide, ammonia, etc. a pai ber a, heng gas te hi non-toxic, rimtui lo mai ni lovin, boruak tibawlhhlawh lo, rawng danglam lo pawh a ni. Foaming agent hmanga siam rubber foam products pore size hi a lian zawk a, shrinkage rate pawh a lian zawk a; foaming agent hman hunah chuan auxiliary foaming agent hian stearic acid, alum, etc. a nei a, hei hian foaming agent a dah hnuah a decomposition temperature chu 130~150°C ah nasa takin a tihhniam thei a ni.
3, vulcanization system thlan dan tur
Vulcanization system hi foaming products research process-ah a pawimawh hle a, a hmasa berah chuan vulcanization system leh foaming system inmil hi foaming products performance tha tak siamna kawngkhar a ni em tih hi a pawimawh hle. Rubber chu hlawhtling takin foam theih a ni a, a pawimawh ber chu rubber vulcanization process a ni a, foaming agent decomposition process chu basically synchronized tur a ni a, a nih loh leh sulfur time aiin foaming time hmalam deuh aiin a awm tur a ni. Chuvangin, vulcanization system i thlan zawh hnuah foaming system chu a inmil turin siamrem la, a nih loh leh foaming system i thlan zawh hnuah vulcanization system chu a inmil turin siamrem rawh.
4、Reinforcing filler thlan dan
Carbon black, silica leh reinforcing agent dangte hian foamed rubber products chakna leh nghet lo a ti sang thei a, calcium carbonate, leilung leh filler dangte a remchan dan anga dah belh chuan rubber processing performance a ti tha thei a, senso pawh a ti tlem thei bawk. Carbon black hian semi-reinforced FEF leh SRF carbon black a thlang tur a ni a, filler hian light calcium carbonate, clay, etc. a thlang tur a ni a, a tam lutuk lo tur a ni a, a tha ber chu copy 20 atanga 40 vel a ni tur a ni.
5、Plasticizer thlan dan
Plasticizer mamawh chu: plasticizing effect tha, dosage hniam, absorption rate rang, rubber nena inmil tha, volatility tlem, migration awm lo, non-toxic, odorless, man tlawm leh hmuh awlsam. Plasticizer hian compounding agent a dispersion degree a ti tha thei a, rubber blend processability leh molding a ti tha thei bawk. Foam rubber product-a foam multiplier sang mamawh, plasticizer dah belh zat tlangpui chu a lian zawk a, rubber plasticizer nena inmil tha tak thlang rawh.
6、Antioxidant thlan dan
Foam rubber products for porous structure, surface area a lian zawk, a tar awlsam zawk, antioxidants nen a inzawm tur a ni. Antioxidant thlan dan principle hi anti-aging effect tha tak a ni ve ve a, mahse foaming agent decomposition a nghawng lo bawk. 4010, 264, MB leh antioxidant dang a thlang thei a, a zat chu general rubber products aiin a tam zawk.
7, rubber foaming tih thupui
Solid rubber foaming production of rubber sponge, principle chu rubber thlan chhuah ah foaming agent dah emaw foaming agent dah leh emaw, vulcanization temperature-a foaming agent decomposition gas chhuah tir, rubber in hual velin bubble hole siam 'chutiang chuan rubber expansion chuan sponge a siam ang.
Bubble pore structure tichiangtu leh nghawngtu ber chu: blowing agent gas awm zat, rubber chhunga gas diffusion rate, rubber viscosity leh vulcanization speed te a ni a, chung zinga pawimawh ber chu blowing agent gas awm zat, gas siam chhuah chak dan leh rubber vulcanization speed inmil hi a ni.
Rubber product tha zawk siam tur chuan blowing agent chi hrang hrang leh rubber vulcanization system thlan hi a pawimawh ber a ni. Thil tih dan bik pahnih a awm a:
A hmasa berin vulcanization temperature angin decomposition temperature leh blowing agent dik tak thlan tur a ni a, chutah chuan vulcanization temperature-a blowing agent decomposition speed angin rubber vulcanization speed siam that nan, late promoter leh promoter dang leh vulcanization system hman ang chi te hmangin vulcanization speed siam that nan promoter awm zat siamrem theih a ni.
Pahnihnaah chuan, vulcanization system-ah chuan vulcanization speed hriat theihna tur, foam chi hrang hrang thlan dan leh particle size dik tak a zirin. Blowing agent particle size pawh hi blowing agent decomposition speed tehna atana pawimawh ber pakhat a ni. Particle size a tlahniam a, particle te surface area bik a sang a, heat transfer efficiency a sang a, decomposition speed a ti chak bawk a, chuvangin blowing agent decomposition speed leh rubber vulcanization speed inkar balance chu blowing agent particle size dik tak thlan hmangin siamrem theih a ni.
Pathumnaah chuan, processing technology a ni
1、Plasticize a ni
Raw rubber plasticize-na thupui ber chu rubber macromolecular chain tihchhiat leh tihchhiat hi a ni. Rubber plasticity tihchangtlun la, chutiang chuan compounding agent mixing leh blending process chu a awlsam zawk ang. Foam rubber product siamnaah hian rubber plasticity a tha zawk chuan bubble holes inang lo, density tlem leh shrinkage rate tlem nei product siam a awlsam zawk. Chuvangin raw rubber hi fully plasticized a ni tur a ni.
2、Thil dahkhawmna
Rubber chu a inhmeh hnuah hun rei tak, a tlangpuiin 2~4h chhung dah a ngai a, chutiang chuan additive hrang hrangte chu rubber mix chhungah a darh kim vek ang. Rubber additives te chu a inthen darh zau poh leh product size a stability a tha zawk a, a chunglam a smooth zawk a, bubble te chu a uniformity tha zawk bawk.
3、Temperature a ni
Rubber foam hian temperature a sensitive hle. Rubber material pakhat hian temperature hrang hrangah foaming effect hrang hrang a nei a. Foaming system leh vulcanization system te hian temperature an sensitive dan a inang lo avangin vulcanization temperature thlak danglam chuan vulcanization system leh foaming system inmil tura harsatna chu a siam tha leh ang.
4、Forming tih a ni
Foamed rubber products molding methods chu: extrusion molding, molding, flat molding, etc. EPDM foamed products hi extrusion molding-ah hman a ni tlangpui a, NBR hi molding-ah hman a ni ber.
