I. Foamed rubber products chungchang tlangpui

Foam rubber products hi physical emaw chemical emaw foaming hmanga siam a ni a, sponge ang chi rubber porous structure products hmuh theih nan base material atan rubber hmangin siam a ni. He technology hi production industry hrang hrangah hman a ni nasa hle a, chu chu automobile door leh window seals, cushioning pads, building construction gaskets, seismic materials, sports protection facilities, etc. te a ni.

1、Foamed rubber tih thumal hi .

Foamed rubber an tih pawh hi rubber foaming technology tia hriat lar a ni a, rubber enkawlna atana specific foaming agent hman a ni a, chuvangin rubber hian processing means characteristic performance a nei a ni. He technology hi tuna production field-ah hian hman a ni nasa zawk a, tun dinhmunah chuan production work hman tlanglawn ber a ni.

2、Foamed rubber products te chu a classification .

Tunah hian foamed rubber products hi production field-a hman lar ber pawl a ni a, pores ang zelin microporous structure leh porous structure chi hnih-ah then theih a ni. leh microporous structure chu foaming product hrang hrang leh continuous foaming product-ah then theih a ni. Rubber raw material ang chuan he product ah hian natural rubber foaming products, isoprene foaming products, SBR foaming products, ethylene propylene rubber foaming products, etc. ah te then theih a ni.

Pahnihnaah chuan foam rubber products te chu analysis nen a inzawm a ni.

Foamed rubber products hi tunlai khawtlang nunah hian hman a ni nasa hle a, a siam chhuah leh siamchhuah dan leh thermoplastic foaming hian khawvel danglamna a nei a, chu chuan vulcanization cross-linking speed leh foaming agent decomposition speed a nei a, chu chu harsatna nen a inmil thei a ni. Chu chu, rubber material hlawhtling tak foaming bakah cross-linking speed bakah hian rubber materials vulcanization process leh blowing agent decomposition chu principle chu a bul berah chuan a inang a nih chuan a decomposition a awm a, chu chu gas expansion wall extension a ni a, a inmil resistance process siam chhuah a ni.

1、A thupui ber thlan dan .

A siamna kawngah chuan, a tlangpuiin scientific rubber body materials thlan tur chuan thil tum bik a mamawh a, heng materials te hi natural rubber products elasticity nem, chakna tlem, elasticity tha tak thlan nan, mahse, product mamawh phuhrukna tur artificial rubber thenkhat thlan nan pawh a ngai a ni. Oil-resistant foam product siamna atan, scientific nitrile rubber remchang thlan a ngaih bakah, neoprene proportion leh inzawmna thlirletna atan pawh, special product thenkhat mamawh phuhruk nan pawh rubber chi hnih emaw a aia tam emaw i hmang thei bawk.

2、Foaming agent thlan theih .

Foaming agent hi foamed rubber siam chhuahnaah hian a pawimawh ber a, a thlan dan pawh hi hnathawh that leh hnathawh that dan nen a inzawm tlat a ni. A tlangpuiin, foaming products te performance tha tak chuan scientific leh reasonable foaming agent a thlang tur a ni a, foaming agent tam zia te, tuna social development requirements te phuhrukna tur methods hman te pawh a thlang tur a ni. Tunah hian blowing agent-ah hian organic blowing agent leh inorganic blowing agent pahnih a awm ber a ni. Inorganic blowing agent hian sodium bicarbonate, ammonium bicarbonate, urea, etc. a kawk ber a, heng blowing agents te hian a hmannaah hian fast decomposition speed leh low temperature te thatna an nei a, theoretically a foaming performance pawh a tha zawk. He technology hmanga gas siam chhuah chu carbon dioxide leh ammonia, etc. a nih ber avangin, heng gas awmna hian rubber structure hian permeability coefficient lian tak a nei a, closed-hole foam rubber siam a harsa a, foam rubber quality hniam quality, shrinkage, deformation awlsam tak siam a harsa a, chuvangin a hman awlsam hle a, a tlangpuiin organic foam-a hman theih a ni a, a tlangpuiin organic foam a ni thei bawk.

Tuna kan hman thin, kan hman tlangpui foaming agent hian nitrogen dicarbonamide, nitroso, dibenzosulfonyl hydrazide ether, etc. a pai ber a, heng thilte hi a decomposition temperature hmannaah chuan 200 °C vel emaw a aia tam emaw a ni a, a siam chhuahna kawngah pawh auxiliary blowing agent dang, ureaxposition, magnesium oxid, magnesium oxid te ang chi te pawh dah belh a ngai a ni. Greatly reduced, thermal decomposition of the gas a siam chhuah ber chu nitrogen, carbon dioxide, ammonia, etc. a ni a, heng gas te hi non-toxic, odorless mai ni lovin, boruak bawlhhlawh lo, a rawng a danglam lo pawh a ni. Foaming agent hmanga siam rubber foam products pore size a lian zawk a, shrinkage rate pawh a lian zawk bawk; Foaming agent hman hian auxiliary foaming agent hian stearic acid, alum, etc. a nei a, hei hian foaming agent decomposition temperature chu nasa takin a tihhniam thei a, add hnuah 130~150°C ah a tihhniam thei bawk.

3, Vulcanization system thlan dan .

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 atana pawimawh ber a ni em tih hi a pawimawh hle. Rubber chu hlawhtling taka foam theih a ni a, a pawimawh ber chu rubber-a vulcanization process leh foaming agent decomposition process chu a bul berah chuan synchronized a ni tur a ni a, a nih loh leh sulfur time chu foaming time a hmaa hun tlemte aiin a synchronize tur a ni. Chuvangin, vulcanization system i thlan hnuah foaming system chu a inmil theih nan siamrem la, a nih loh leh foaming system i thlan hnuah Vulcanization system chu a inmil theih nan siamrem leh rawh.

4、Reinforcing filler thlan tur a awm .

Carbon black, silica leh reinforcing agents dangte hian foamed rubber products chakna leh chakna a ti tha thei a, calcium carbonate, clay leh filler dangte pawh a dah tel chuan rubber processing performance a ti tha thei a, a senso pawh a ti tlem thei bawk. Carbon Black chuan semi-reinforced Fef a thlang tur a ni a, SRF carbon black, filler chuan light calcium carbonate, clay, etc. a thlang tur a ni a, a zat chu a tam lutuk tur a ni lo, a tha ber chu 20 atanga 40 copy a ni tur a ni.

5、Plasticizer thlan tur .

Plasticizer mamawh chu: plasticizing effect tha, dosage hniam, absorption rate chak, rubber nena inmil tha, volatility tlem, migration awm lo, non-toxic, odorless, man tlawm leh hmuh awlsam. Plasticizer hian compounding agent dispersion degree a ti tha thei a, rubber blend a processability leh molding a ti tha thei bawk. Foam rubber products foam multiplier sang tak mamawh a, plasticizer a tam zawk a dah belh a, rubber plasticizer nena inmilna tha tak a thlang bawk.

6、Antioxidant thlan dan tur .

Foam rubber products porous structure atan chuan surface area a lian zawk a, a tar awlsam zawk a, antioxidants nen a inzawm a ngai bawk. Antioxidant thlan dan principle hi anti-aging effect tha tak a ni a, mahse foaming agent decomposition a nghawng lo bawk. 4010, 264, MB leh antioxidant dang thlan theih a ni a, chu chu general rubber products aiin a tam zawk a ni.

7, rubber foaming tih thupui hmanga thu bul .

Rubber sponge solid rubber siamchhuahna, a principle chu rubber thlan chhuahah foaming agent dah belh emaw, foaming agent re-add emaw a ni a, chu chu vulcanization temperature-a gas chhuah theihna tura foaming agent tihchhiatna a ni a, rubber-in a hual vel a, chu chuan bubble hole a siam a, chu chuan rubber expansion chu sponge a siam a ni.

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 sawiselna ber chu blowing agent gas awm zat inmil te, gas siam chhuah chakna leh rubber vulcanization speed te hi a ni.

Rubber product tha zawk siam tur chuan blowing agent species leh rubber vulcanization system thlan hi a pawimawh ber a ni. Thil tih dan chiang tak pahnih a awm a:

A hmasa berin, decomposition temperature leh blowing agent dik tak thlan nan vulcanization temperature angin, chutah chuan vulcar-a vulcanization speed siamrem turin blowing agent decomposition speed angin, late promoter leh promoter dang hman leh vulcanization system hman ang chi, promoter zat chu vulcanization speed siamrem turin hman theih a ni.

Pahnihnaah chuan, vulcanization system-ah chuan vulcanization speed hriat theihna tur, foam chi hrang hrang thlan dan leh particle size tha tak a nih dan azirin. 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 a, chuvangin blowing agent decomposition speed leh rubber vulcanization speed inkar balance chu blowing agent particle size tling tak thlan hmangin a siamrem theih a ni.

Pathum, processing technology 1.1.

1、plasticizing .

Raw rubber plasticizing essence chu rubber macromolecular chain tihchhiat leh tihchhiat a ni. Rubber plasticity siam hat la, chutiang chuan compounding agent-a mixing leh blending process chu tih awlsam zawk a ni ang. Foam rubber products siamnaah chuan rubber plasticity a tha zawk a, chu chu bubble holes inang tlang, density te tak te leh shrinkage rate tlem te siam a awlsam zawk. Chuvangin, raw rubber chu plastic-a siam kim vek tur a ni.

2、Thupui .

Rubber an inhmeh hnuah chuan hun rei tak, a tlangpuiin 2~4h, chutiang chuan additive hrang hrang chu rubber mix-ah a darh kim vek tur a ni. Rubber additives te chu a inthlau zawk chuan product size stability a tha zawk a, a chung lam a smooth leh bubble te a inang tlang zawk bawk.

3、Thil awm dan .

Rubber foam hi a sensitive hle a, a temperature pawh a to hle. Rubber material pakhat hian temperature hrang hrangah foaming effect hrang hrang a nei a. Foaming system leh vulcanization system te hi temperature ah an sensitive dan a inang lo a, chuvang chuan vulcanization temperature thlak danglam chuan vulcaming system leh foaming system te inmil tir chungchanga buaina chu a siam tha leh ang.

4、Entirna .

Foamed rubber products moulding methods te chu: extrusion molding, molding, flat molding, etc. EPDM foamed products hi extrusion molding-ah an hmang tlangpui a, NBR hi molding-ah an hmang tam ber a ni.