I. rɔba nneɛma a wɔde foam ayɛ no ho nsɛm .
Foam rɔba products nam honam fam anaa nnuru foaming kwan a rɔba sɛ nnyinaso ade ma wonya sponge-te sɛ rɔba porous structure products. Wɔde saa mfiridwuma yi adi dwuma kɛse wɔ nnwuma ahorow a wɔyɛ mu, te sɛ kar pon ne mfɛnsere mu nsɔano, ntama a wɔde hyɛ kar mu, adan a wɔde si dan mu gaskets, asasewosow ho nneɛma, mmeae a wɔbɔ agumadi ho ban, ne nea ɛkeka ho.
1、Adwenkyerɛ a ɛfa rɔba a ɛyɛ foam ho .
Nea wɔfrɛ no rɔba a wɔde foam ayɛ no nso yɛ nea wonim no kɛse sɛ rɔba a wɔde yɛ ahurututu, ne ade pɔtee a wɔde yɛ ahurututu a wɔde sa rɔba, ma enti rɔba wɔ ɔkwan a wɔfa so yɛ adwuma no su. Saa mfiridwuma yi yɛ nea wɔde di dwuma kɛse wɔ mprempren nneɛma a wɔyɛ mu, ne ɔkwan a wɔtaa fa so yɛ adwuma wɔ saa bere yi mu.
2、Nneɛma a wɔde yɛ rɔba a wɔde aduru a wɔfrɛ no foam ayɛ no ho nhyehyɛe .
Mprempren rɔba nneɛma a wɔde foam ayɛ no yɛ nneɛma a wɔde di dwuma kɛse wɔ adeyɛ no mu no mu biako, a wobetumi akyekyɛ mu ayɛ no microporous nhyehyɛe ahorow abien ne abon a ɛwɔ mu sɛnea ntini no te. na wobetumi akyekyɛ microporous nhyehyɛe no mu ayɛ no nneɛma a ɛyɛ ahurututu a ɛsono emu biara ne nneɛma a ɛma ahurututu kɔ so. Sɛnea raw material a rɔba betumi akyekyɛ mu ayɛ saa ade yi mu abɔde rɔba foaming nneɛma, isoprene foaming nneɛma, SBR foaming nneɛma, ethylene propylene rɔba foaming nneɛma, ne nea ɛkeka ho.
Nea ɛto so abien, foam rɔba nneɛma a ɛwɔ nhwehwɛmu .
Wɔde rɔba nneɛma a wɔde foam ayɛ no di dwuma kɛse wɔ mprempren ɔmanfo mu, ne yɛ ne ne yɛ ho nhyehyɛe ne thermoplastic foaming wɔ wiase a nsonsonoe wɔ mu, ɛwɔ vulcanization cross-linking ahoɔhare ne ahoɔhare a poaming agent no decomposition ma ɛne ɔhaw no hyia. Ɛne sɛ, rɔba ade a edi mu a ɛyɛ ahuru a ɛka ahoɔhare a ɛwɔ cross-linking no ho no, abusuabɔ a emu yɛ den wɔ vulcanization nhyehyɛe a ɛfa rɔba nneɛma ho no ntam na ade a ɛbɔ no porɔw no ba bere a nnyinasosɛm no yɛ ade koro titiriw no, yɛ gas ntrɛwmu ɔfasu no ntrɛwmu ma ɛyɛ nea ɛne no hyia a ɛko tia nyarewa no.
1、Nneɛma titiriw a wɔpaw .
Wɔ adeyɛ mu no, mpɛn pii no ɛhwehwɛ sɛ ade no botae pɔtee no paw nyansahu mu rɔba nipadua mu nneɛma no, saa nneɛma yi wɔ ahoɔden a ɛyɛ mmerɛw, ahoɔden a ɛkɔ fam, abɔde mu rɔba nneɛma a ɛyɛ den a wɔpaw mu, nanso wɔpaw rɔba a wɔde ayɛ nso de di ade no ahiade ho dwuma. Sɛ wɔreyɛ nnuru a wɔde yɛ foam a ngo ntumi nkɔ mu a, nea ɛka hia a ehia sɛ wɔpaw nyansahu mu nitrile rɔba a ntease wom ho, nanso wɔhwehwɛ neoprene no fã ne abusuabɔ mu nso, na mpo sɛ wubedi nneɛma titiriw bi ahiade ho dwuma ho a, wubetumi de rɔba ahorow abien anaa nea ɛboro saa nso adi dwuma ne ɔkwan a wɔfa so yɛ no.
2、Agent a wɔpaw no .
Aduru a wɔde yɛ ahurututu no ne ade a ɛho hia sen biara wɔ rɔba a wɔde ahurututu ayɛ no nyinaa mu, na nea wɔpaw no ne adwuma a wɔyɛ no yiye ne sɛnea ɛyɛ papa no wɔ abusuabɔ kɛse. Sɛ yɛbɛka no ɔkwan biara so a, ɛsɛ sɛ nneɛma a wɔde yɛ ahuru no yɛ adwuma yiye no paw nyansahu mu aduru a ɛma ahurututu yɛ kɛse, ne aduru dodow a wɔde yɛ ahurututu, akwan a wɔfa so di mprempren asetra mu nkɔso ho ahwehwɛde ahorow ho dwuma. Mprempren, ade a ɛbɔ no titiriw kura organic blowing agent ne inorganic blowing agent abien. Inorganic blowing agent titiriw kyerɛ sodium bicarbonate, ammonium bicarbonate, urea, ne nea ɛkeka ho Saa nneɛma a ɛbɔ saa no wɔ mfaso a ɛwɔ ahoɔhare a ɛporɔw ntɛmntɛm ne ɔhyew a ɛba fam wɔ dwumadie no mu, wɔ nsusuwii mu no, ne foaming adwumayɛ nso ye. As the gas produced by this technology in the application is mainly carbon dioxide and ammonia, etc., the presence of these gases makes the rubber structure has a large permeability coefficient, it is difficult to create a closed-hole foam rubber, the production of foam rubber low quality, low strength, shrinkage, easy to deformation, so it is extremely easy to use alone in the work, and generally can be used as an organic foaming agent to use.
Mprempren adwuma, yɛtaa de di dwuma foaming agent titiriw kura nitrogen dicarbonamide, nitroso, dibenzosulfonyl hydrazide ether, ne nea ɛkeka ho.. Saa nneɛma yi wɔ ne decomposition hyew a wɔde di dwuma no bɛyɛ 200 °C, na wɔ production nhyehyɛe no nso hia a ald other auxiary agent, suctifity, ne nea ɛkeka ho ire urea Sɛ wɔtew mframa a wɔyɛ no so kɛse a, ɔhyew a ɛporɔw no titiriw kura nitrogen, carbon dioxide, ammonia, ne nea ɛkeka ho, ɛnyɛ awuduru nko na saa mframa yi nni mu, enni hua, na mpo ɛwɔ mfaso a ɛne sɛ ɛnyɛ nea ɛde efĩ ba nneɛma a atwa yɛn ho ahyia no so, ɛnyɛ kɔla. Rɔba a wɔde yɛ foam a wɔde foaming agent ayɛ no kɛse no yɛ kɛse, na shrinkage rate nso yɛ kɛse; Sɛ wode aduru a ɛma ahurututu yɛ adwuma di dwuma a, ade a ɛboa ma ɛyɛ foam no wɔ stearic acid, alum, ne nea ɛkeka ho, a ebetumi atew ɔhyew a ɛwɔ aduru a wɔde yɛ ahurututu mu no so kɛse akɔ 130 ~ 150°C bere a wode aka ho akyi.
3, vulcanization nhyehyɛe a wɔpaw .
Vulcanization nhyehyɛe ho hia yiye wɔ nhwehwɛmu nhyehyɛe a ɛfa foaming nneɛma ho, nea edi kan koraa no, sɛ ebia vulcanization nhyehyɛe ne foaming nhyehyɛe no hyia no ne ade titiriw a ɛma nneɛma yɛ adwuma yiye. Wobetumi ayɛ rɔba a ɛyɛ hu yiye, ade a ɛho hia sen biara ne vulcanization nhyehyɛe a ɛfa rɔba ho no na ɛsɛ sɛ wɔde aduru a ɛma ahurututu no sɛe no yɛ nea ɛne ne ho hyia titiriw, anaasɛ bere a wɔde yɛ sulfur sen bere a wɔde ahuru kakra wɔ anim no. Enti, bere a woapaw vulcanization nhyehyɛe no awie no, yɛ nsakrae wɔ foaming nhyehyɛe no mu ma ɛne no nhyia, anaasɛ bere a woapaw foaming nhyehyɛe no awie no, yɛ nsakrae wɔ vulcanization nhyehyɛe no mu ma ɛne no nhyia.
4、Nea Wɔpaw a Wɔde Hyɛ Filler a Ɛhyɛ Mu den .
Carbon black, silica ne nneɛma afoforo a ɛhyɛ den betumi ama ahoɔden ne stiffness a ɛwɔ foamed rɔba products mu no atu mpɔn, calcium carbonate, dɔte ne nneɛma afoforo a wɔde hyɛ mu a ɛfata a wɔde bɛka ho no betumi ama rɔba no adwumayɛ ayɛ yiye na ama ɛka so atew. Ɛsɛ sɛ carbon black paw FEF ne SRF carbon black a wɔahyɛ no den fã bi, ɛsɛ sɛ filler paw calcium carbonate a emu yɛ hare, dɔte, ne nea ɛkeka ho, ɛnsɛ sɛ dodow no yɛ kɛse, sɛ ɛbɛyɛ yiye a, 20 kosi 40 na ɛwɔ hɔ.
5、Pasticizer a wɔpaw no .
Plasticizer ahwehwɛdeɛ ne: plasticizing effect pa, dosage a ɛba fam, absorption rate a ɛba ntɛmntɛm, rɔba a ɛne no hyia yie, volatility nketewa, tu a ɛtu kɔ baabi foforɔ, ɛnyɛ awuduru, huam nni mu, ne boɔ nyɛ den na ɛnyɛ den sɛ wobɛnya. Plasticizer betumi ama aduru a wɔde frafra no apete, sɛnea ɛyɛ adwuma ne sɛnea wɔde rɔba a wɔde afra no yɛ no yiye. Foam rubber products a ɛhwehwɛ sɛ wɔde foam multiplier a ɛkorɔn gu so no, plasticizer dodow a wɔde ka ho no yɛ kɛse, na paw nea ɛne rɔba plasticizer hyia yiye.
6、Toint a ɛwɔ antioxidant mu .
Foam rɔba nneɛma a wɔde yɛ porous structure, asase ani no yɛ kɛse, ɛnyɛ den koraa sɛ wɔde bɛbɔ akwakoraa, ɛsɛ sɛ wɔde ka nnuru a ekum ɔyare mmoawa ho. Nnyinasosɛm a ɛne sɛ wɔbɛpaw antioxidant no nyinaa yɛ anti-aging effect pa, nanso ɛnka sɛnea foaming agent no porɔw nso. betumi apaw 4010, 264, MB ne nneɛma afoforo a ɛko tia ɔyare mmoawa, dodow a ɛboro rɔba nneɛma a wɔde di dwuma wɔ ɔkwan a ɛkɔ akyiri so no so.
7, nnyinasosɛm a ɛne sɛ rɔba a ɛyɛ hu .
Solid rɔba foaming rɔba sponge, nnyinasosɛm ne sɛ wɔde foaming agent bɛka rɔba a wɔapaw anaasɛ re-add foaming agent, porɔw a foaming agent wɔ vulcanization temperature ma gyae gas, a atwa rɔba ho ahyia ma ayɛ bubble tokuru ‘sɛnea ɛbɛyɛ a rɔba ntrɛwmu no bɛyɛ sponge.
Nneɛma titiriw a ɛkyerɛ na enya nkɛntɛnso wɔ bubble pore no nhyehyɛe so ne: mframa dodow a ɛbɔ, gas a ɛtrɛw wɔ rɔba no mu, rɔba no mu nsu a ɛyɛ nwini ne vulcanization ahoɔhare, a nea ɛkasa tia kɛse ne mframa a ɛbɔ ntɛmntɛm a ɛne mframa a ɛbɔ ntɛmntɛm ne ahoɔhare a rɔba no de tu ntɛmntɛm no hyia.
Sɛnea ɛbɛyɛ na wɔayɛ rɔba nneɛma a eye sen biara no, ade a ɛma nneɛma bɔ ne rɔba vulcanization nhyehyɛe a wɔpaw no ne ade titiriw. Akwan pɔtee abien na ɛwɔ hɔ:
Nea edi kan no, sɛnea vulcanization ɔhyew kyerɛ no, sɛ wobɛpaw ɔhyew a ɛporɔw ne ade a ɛfata a ɛbɔ, na afei sɛnea ɛporɔw ahoɔhare a ɛwɔ afiri a ɛbɔ wɔ vulcanization ɔhyew mu no te de siesie vulcanization ahoɔhare a rɔba no de di dwuma, te sɛ nea wɔde di dwuma wɔ late promoter ne promoters ne vulcanization nhyehyɛe afoforo mu no, de di dwuma de siesie promoter dodow no ma ɛyɛ nsakrae wɔ vulcanization ahoɔhare no mu.
Nea ɛto so abien, wɔ vulcanization nhyehyɛe no fam no, sɛnea ɛbɛyɛ a wobehu ahoɔhare a vulcanization de ba no, sɛnea foam ahorow a wɔpaw ne nneɛma nketenkete a ɛfata a wɔpaw no te. Nneɛma nketenkete a ɛma mframa bɔ kɛse no nso yɛ nneɛma a ɛho hia sen biara a ɛma wohu ahoɔhare a ade a ɛbɔ no de tu mmirika no mu biako. Nneɛma nketenkete no kɛse so tew, nneɛma nketenkete no ani fã pɔtee no kɔ soro, ɔhyew a ɛkɔ soro no kɔ soro, na ahoɔhare a ɛporɔw no yɛ ntɛmntɛm, enti wobetumi ayɛ nsakrae wɔ ahoɔhare a ɛda ade a ɛbɔ no ne rɔba no vulcanization ahoɔhare a ɛkari pɛ no ntam denam nneɛma nketenkete a ɛbɔ no kɛse a ɛfata a wɔbɛpaw so.
abiɛsa, mfiridwuma ho nimdeɛ a wɔde di dwuma .
1、plasticizing .
Nea ɛho hia wɔ rɔba a wɔannoa a wɔde plastic ayɛ no mu ne sɛ wobebubu na wɔasɛe rɔba a ɛyɛ kɛse no. Ma rɔba no plastic a ɛyɛ plastic no nyɛ yiye, sɛnea ɛbɛyɛ a ɛbɛyɛ mmerɛw sɛ wɔbɛyɛ aduru a wɔde frafra mu ne nea wɔde frafra no. Wɔ foam rɔba nneɛma a wɔyɛ mu no, dodow a rɔba no plasticity yɛ papa no, dodow no ara na ɛyɛ mmerɛw sɛ wɔbɛyɛ nneɛma a ɛwɔ bubble holes a ɛyɛ pɛ, ɛyɛ den nketenkete ne shrinkage rate nketewa. Enti, ɛsɛ sɛ wɔyɛ rɔba a wɔannoa no ho plastic koraa.
2、akorae .
Sɛ wɔde rɔba no fra wie a, ɛsɛ sɛ wɔde si hɔ bere tenten a ɛfata, mpɛn pii no 2 ~ 4h, sɛnea ɛbɛyɛ a nneɛma ahorow a wɔde ka ho no bɛpete koraa wɔ rɔba a wɔde afra no mu. Dodow a wɔpete rɔba a wɔde ka ho no pɛpɛɛpɛ no, dodow no ara na ade no kɛse a ɛyɛ den, sɛnea ɛyɛ mmerɛw wɔ soro ne sɛnea ahurututu no yɛ pɛ no yɛ papa.
3、temperature .
Rɔba a wɔde yɛ aduru no yɛ nea ɛyɛ mmerɛw yiye wɔ ɔhyew ho. Rɔba ade koro no ara wɔ foaming nkɛntɛnso ahorow wɔ ɔhyew ahorow mu. Esiane sɛ foaming nhyehyɛe ne vulcanization nhyehyɛe no yɛ mmerɛw wɔ ɔhyew ho wɔ ɔkwan soronko so nti, vulcanization ɔhyew a wɔbɛsakra no bɛsan asiesie ɔhaw a ɛne sɛ wɔde vulcanization nhyehyɛe no ne foaming nhyehyɛe no bɛyɛ pɛ no.
4、Nneɛma .
Akwan a wɔfa so yɛ rɔba a wɔde foam ayɛ no ne: extrusion molding, molding, flat molding, ne nea ɛkeka ho EPDM foamed products Wɔtaa de di dwuma wɔ extrusion molding mu, na wɔde NBR di dwuma kɛse wɔ nwene mu.
