Nnuru a ɛwɔ nsuo mu mmienu-adeɛ a ɛyɛ foaming adeɛ no taa yɛ adeɛ a ɛwɔ mu ( isocyanate component) ne component B (polyol component). Sɛ wɔde fra wie a, nneɛma abien no yɛ ade ma ɛyɛ foam. Nea edidi so yi yɛ nhwehwɛmu pɔtee bi:
1.Afã A ( .Isocyanate no fã bi .)
• Nneɛma atitiriw: polyisocyanates, nea ɛtaa ba ne toluene diisocyanate (TDI) ne diphenylmethane diisocyanate (MDI), a ɛka polymeric MDI (PAPI) ho.
• Dwumadie: Sɛ "crosslinking agent" a ɛwɔ adeyɛ no mu no, ɛne hydrogen kuw a ɛyɛ adwuma no yɛ adwuma wɔ component B mu na ɛyɛ core raw material a wɔde yɛ foam structure.
2.Component B (Polyol fã) .
Nneɛma ahorow a ɛde ne ho hyɛ adeyɛ no mu na ɛhwɛ foam su ahorow so:
• Polyols: te sɛ polyether polyol ne polyester polyol, a ɛma hydroxyl ({0}}OH) na ɛne-NCO kuw a ɛyɛ isocyanate no yɛ adwuma, na ɛyɛ nnompe nnompe nnyinaso.
• Aduru a ɛma ahurututu yɛ adwuma: ɛma gas a ɛbɛtrɛw afrafra no mu na ɛyɛ ahurututu. Nea ɛtaa ba ne nneɛma a ɛma nipadua no mu yɛ hyew (sɛ nhwɛso no, freon a wɔde si ananmu, cyclopentane) ne nnuru a ɛma ahurututu mu ahurututu (sɛ nhwɛso no, nsu, a ɛne isocyanate yɛ adwuma ma ɛyɛ carbon dioxide).
• Catalyst: Ɛma adeyɛ no yɛ ntɛmntɛm, te sɛ amine a ɛma nneɛma yɛ kɛse (ɛma ahurututu mu nsu a ɛyɛ foaming) ne organotin a ɛma nneɛma yɛ kɛse (promotes gel reaction).
• Nneɛma a ɛma nsu yɛ adwuma: Ɛma ahurututu no yɛ den na ɛmma ahurututu no npae. Mpɛn pii no, ɛyɛ nneɛma a wɔde siloxane ayɛ.
• Nneɛma foforo a wɔde ka ho: te sɛ ogya a ɛmma ogya ntumi nhyew, nneɛma a wɔde hyɛ mu, kɔla ahorow, ne nea ɛkeka ho, a wɔde ka ho sɛnea wɔde di dwuma no ho ahwehwɛde ahorow a ɛbɛma ogya no agyae, ahoɔden ne nneɛma afoforo a ɛwɔ ahurututu no mu no atu mpɔn.
3.Nnyinasosɛm a ɛfa ho .
Sɛ wɔde afã horow A ne B frafra a,-NCO akuw a ɛwɔ isocyanate mu no ne-OH akuw a ɛwɔ polyol ne nsu mu no yɛ adwuma, na ɛma mframa (ahurusi) no yɛ ade a ɛyɛ ahurututu a ɛyɛ abon. Nneɛma pɔtee ne nneɛma ahorow a ɛwɔ mu no na ɛkyerɛ foam no density, hardness, thermal insulation properties, ne su afoforo. Saa nneɛma a ɛyɛ adwuma pii yi hu sɛ wɔde di dwuma kɛse wɔ nneɛma a wɔde siw mframa ano, nneɛma a wɔde kyekyere nneɛma ho ano aduru, nneɛma a wɔyɛ, ne nnwuma a ɛfa ho mu.