Sɛ́ ade titiriw a ɛwɔ atetesɛm mu adidibea nneɛma mu no, nnua a wɔde yɛ pon so nneɛma kɔ so di gyinabea titiriw wɔ nnɛyi adidibea ahorow mu esiane nneɛma soronko a ɛwɔ mu ne nneɛma a atwa yɛn ho ahyia ho mfaso horow nti. Ne dwumadie no ka nneɛma ahodoɔ pii ho, a nea ɛka ho ne honam fam nneɛma, nnuru a ɛgyina pintinn, osuahu a ɔde di dwuma, ne nkɛntɛnsoɔ a ɛwɔ nneɛma a atwa yɛn ho ahyia so. Nea edidi so yi de nhwehwɛmu a ɛkɔ akyiri a efi adwumayɛfo adwene mu ma.
1. Nneɛma a Wɔde Yɛ Nneɛma ne Mfiridwuma mu Nneɛma
Nneɛma titiriw a wɔde yɛ nnua pon so nneɛma taa yɛ nnua a ɛyɛ den (te sɛ oak ne walnut) anaa nnua a ɛyɛ mmerɛw (te sɛ maple ne cherry). Sɛnea ɛyɛ den ne sɛnea ɛyɛ den no nya sɛnea ɛtra hɔ kyɛ no so nkɛntɛnso tẽẽ. Nnua a ɛyɛ den, esiane ne nkwammoaa nhyehyɛe a ɛyɛ den nti, ma ahoɔden a ɛkorɔn a wɔde mia (mpɛn pii no 3-4 wɔ Mohs denden nsenia so), na ɛma etumi gyina dwumadi ahorow a wɔyɛ no daa te sɛ nea wotwitwa ne nea wɔkanyan a enni deformation ano. Bere a nnua a ɛyɛ mmerɛw no mu yɛ hare no, ɛyɛ mmerɛw sɛ ɛbɛtwetwe na ayɛ mmerɛw wɔ nhyɛso a ɛkyɛ mu. Afei nso, dua abɔde mu nhama a wɔde yɛ no ma ɛyɛ den sɛnea ɛsɛ, na ɛma nsu a ɛtɔ gu fam no nya nkɛntɛnso wɔ ɔkwan a etu mpɔn so na ɛtew asiane a ɛwɔ hɔ sɛ ebebubu no so. Nanso, nnua a wɔde yɛ pon so nneɛma no ntumi nkɔ ɔhyew mu yiye (bɛyɛ 0.1-0.2 W/m·K). Bere a eyi betumi asiw nnuan a ɛyɛ hyew ano sɛ ɛrenhyew no, ebetumi ama mpaapaemu nketenkete aba bere a wɔde di dwuma ne nnuan a ɛyɛ nwini anaa ɛyɛ hyew kɛse esiane ɔhyew a ɛtrɛw ne nea ɛtwetwe nti.
2. Nnuru a Ɛgyina Hɔ ne Ahobammɔ
Nnua nyɛ -dade na enni plasticizers biara. Ɛnyɛ mmerɛw sɛ nnuru ne nnuan a acid anaa alkaline bɛyɛ adwuma, na ɛnam so kwati dade ion a ɛbɛtwetwe a ebetumi aba wɔ dade pon so nneɛma ho (sɛ nhwɛso no, aluminium pon so nneɛma ma aluminium ions fi adi bere a wɔde ahyɛ nnuan a acid wom mu). Nanso, ɛho hia sɛ yɛhyɛ no nsow sɛ sɛnea nnua no yɛ porosity no ma ɛyɛ mmerɛw sɛ srade ne pigment bɛtwe. Sɛ wɔde nneɛma a wɔde yɛ aduan a ɛyɛ tuntum-kɔla (te sɛ soya sauce ne curry) di nkitaho bere tenten a, ebetumi ama ne soro ayɛ nkekae. Bio nso, ebia phenolic nnuru anaa mmoawa nketenkete kakraa bi na ɛwɔ nnua a wɔansiesie no yiye mu. Enti, wɔn a wɔyɛ nneɛma a wɔagye din taa de nnuru a wɔde yɛ nneɛma a ɛwɔ soro te sɛ carbonization a ɛwɔ ɔhyew a ɛkorɔn, nneɛma a wɔde kata aduan-grade waxes (te sɛ ntɛtea ne nnuadewa ngo), anaasɛ nsu-based, eco-adamfofa paints di dwuma de ma ɛko tia mmoawa ne nea ɛhyɛn mu no yɛ kɛse.
3. Osuahu a Ɔde Di Dwuma ne Dwumadi
Nnua pon so nneɛma wɔ ade a wɔde ka ho brɛoo ne friction coefficient a ɛkɔ fam, na ɛma ɛfata mmofra ne wɔn a wɔn mfe akɔ anim. Sɛnea nneɛma a ɛwɔ soro no betumi ama aduan ne pon so nneɛma a ɛbata ho no ayɛ kɛse. Sɛ nhwɛso no, sɛnea nnua nsenia yɛ kurukuruwa na ɛyɛ kurukuruwa no ma ɛyɛ mmerɛw sɛ wɔbɛbɔ aburow anaa soup. Nanso, sɛnea nnua twetwe nsu no yɛ sintɔ kɛse. Sɛ wɔde nsu gu mu kyɛ a, ebetumi ama emu ayɛ ma, na ama ɛho ahonhon, asɛe, na mpo nsunsu anyin. Nsɔhwɛ mu nsɛm kyerɛ sɛ nnua a ɛyɛ den a nsuo ntumi nkɔ mu pon so nneɛma tumi trɛw 5%-8% bere a wɔde ahyɛ nsuo mu bɛboro simma aduasa akyi. Enti, ɛsɛ sɛ wɔma ɛyow ntɛm ara bere a wɔde adi dwuma da biara da akyi na ɛnsɛ sɛ wogyaw wɔ nsu mu bere tenten.
4. Nneɛma a Atwa Yɛn Ho Ahyia a Wɔbɛsakra ne Nsiesiei Ahwehwɛde
Nnua pon so nneɛma tumi te ɔhyew ne ɔhyew a ɛsakrasakra no nka. Ɛyɛ mmerɛw sɛ nsu bɛtɔ mu na ɛpaapae wɔ mmeae a ɛhɔ yɛ kusuu, bere a nsunsu betumi aba wɔ mmeae a ɛhɔ yɛ nwini no. Wɔhyɛ nyansa sɛ wɔmfa nsie baabi a ɛhɔ yɛ nwini, mframa pa-mframa wom na fa mineral oil gu so daa na ama nsuo a ɛkari pɛ (sɛ ɛbɛyɛ yie 8%-12%). Kwati sɛ wode dade aboa nhoma anaa nnuru a ano yɛ den a wɔde hohoro nneɛma ho bedi dwuma bere a worehohoro ho no na amma ade a ɛbɔ ho ban a ɛwɔ soro no ansɛe no. Sɛ wɔhwɛ so yiye a, nnua a wɔde yɛ pon so nneɛma betumi atra hɔ mfe pii anaa nea ɛboro saa mpo na efi awosu mu sɛe bere a wɔatow agu awie no, na ɛnam so agye nneɛma a atwa yɛn ho ahyia ho nnyinasosɛm ahorow a ɛtra hɔ daa atom.
Awie
Nnua pon so nneɛma a wɔde yɛ adwuma yiye no kyerɛ sɛnea abɔde mu nneɛma ne nnipa ahiade kari pɛ wɔ ɔkwan a ɛyɛ mmerɛw so. Ɛmfa ho sɛ anohyeto ahorow wɔ sɛnea ɛtra hɔ kyɛ ne nsu a ɛko tia mu no, nyansahu mu nneɛma a wɔpaw ne akwan a wɔfa so yɛ nneɛma a ɛwɔ soro no betumi ama mfaso a ɛwɔ so no ayɛ kɛse. Wɔ adidi pa ne nneɛma a atwa yɛn ho ahyia a wɔbɛkora so akyi di mu no, nnua a wɔde yɛ pon so nneɛma a wɔbɛma ayɛ adwuma yiye no da so ara yɛ ade titiriw a wɔde wɔn adwene si so wɔ afie mu nneɛma ho nhwehwɛmu ne nkɔso mu.