High-Density Polyethylene (HDPE) board, sɛ High-Adwumayɛ ho mfiridwuma plastic, wɔde di dwuma kɛse wɔ nnwuma, adansi, ne nnuruyɛ mfiridwuma mu. Ne honam fam ne nnuru su a ɛkyɛn so ne nneɛma a wɔde yɛ adwuma no ma ɛyɛ ade titiriw a wɔpaw wɔ mfuw pii mu. Saa asɛm yi bɛkyerɛkyerɛ HDPE board no mfiridwuma mu su ahorow mu akɔ akyiri afi mfiridwuma mu nneɛma a ɛwɔ hɔ, nnuru a ɛyɛ den, nneɛma a atwa yɛn ho ahyia ho adwennwen a ɛpaapae, ne adwumayɛ mu adwumayɛ ho adwene mu.
1.Afiri a ɛyɛ fɛ yiye .
HDPE board no wɔ density a ɛkorɔn (mpɛn pii no ɛwɔ 0.94-0.97 g/cm3 ntam), a ɛma ɛyɛ rigidity a ɛkyɛn so, impact resistance, ne abrasion resistance. Ne tensile ahoɔden taa du 20-35 MPa, na ne flexural ahoɔden no yɛ kɛse, na ɛma otumi gyina mfiri adesoa a emu yɛ duru ano. Bio nso, HDPE board no wɔ coefficient a ɛba fam a ɛyɛ friction (bɛyɛ 0.05-0.1) ne ne ho a ɛyɛ fɛ a ɛma ne ho yɛ hyew, na ɛma ɛfata sɛ wɔde di dwuma a ɛhwehwɛ sɛ wɔtew friction so, te sɛ akwankyerɛ keteke kwan ne conveyor belts.
2.Nnuru a ɛyɛ den yiye .
HDPE board da no adi sɛ ɛyɛ den yiye sɛ ɛbɛko atia acid, alkali, nkyene, ne nnuru a wɔde yɛ nneɛma a ɛma ɛyɛ hyew dodow no ara, na ɛkame ayɛ sɛ nnuru nyinaa nnya so nkɛntɛnso wɔ dan mu hyew mu. Saa agyapadeɛ yi ama wɔde adi dwuma kɛseɛ wɔ nnuru, nneɛma a atwa yɛn ho ahyia, ne nsuo fĩ a wɔde yɛ adwuma mu, te sɛ corrosion-a ɛko tia linings ne tank linings. Nanso, HDPE a ɛko tia oxidizing acid ahorow bi a ano yɛ den (te sɛ nitric acid a wɔahyɛ no den ne sulfuric acid) so tew wɔ ɔhyew a ɛkɔ soro mu (mpɛn pii no ɛboro digrii 60 ), enti wɔhyɛ nyansa sɛ wɔnyɛ ahwɛyiye bere a wɔde di dwuma wɔ nnuru a ano yɛ den mu no.
3. Nneɛma a atwa yɛn ho ahyia ho nhyɛso a ɛkyɛn so a ɛpaapae (ESCR) .
HDPE krataa no wɔ molecule mu duru kyekyɛ ne crystallinity a ɛkorɔn, a ɛma ɛtumi kura krak ahoɔden a ɛkyɛn so mpo wɔ bere tenten-bere mu nhyɛsoɔ ase. Eyi ma ɛfata ma application ahorow a ɛda adi wɔ bere tenten-bere mu ahoɔden a ɛyɛ nnam anaasɛ nneɛma a atwa yɛn ho ahyia ho nhyɛso, te sɛ nsu a wɔde fa nsu mu ne tank a wɔde hyɛ mu. Sɛ wɔde toto polyethylene a wɔtaa de di dwuma ho a, HDPE krataa no da ESCR a ɛko tia nyarewa a ɛware kɛse adi, na ɛtrɛw ne nkwa nna mu.
4. Processability a ɛkyɛn so .
Wobetumi de akwan horow ayɛ HDPE krataa no ho adwuma na wɔayɛ no foforo, a nea ɛka ho ne ɔhyew a wɔde mia, nea wɔde yi fi mu, ne injection molding. Ɛyɛ nea wotumi sesa no yiye na wotumi yɛ no wɔ ne kɛse, ne kɛse, ne ne nsusuwii ahorow mu. Ne hyew a ɛyɛ hyew no bɛyɛ 130-137℃, na ɛma nsu a ɛyɛ fɛ yiye bere a wɔreyɛ ho adwuma, ɛnyɛ den sɛ wɔbɛyɛ no, na ɛyɛ den sɛ ɛbɛkɔ soro. Bio nso, wobetumi adi HDPE nkrataa ho dwuma denam welding, mfiri, ne akwan foforo so de adi dwumadie tebea ahodoɔ ahiadeɛ ho dwuma.
5. Mfiridwuma ho nneɛma afoforo .
1.Weather resistance: HDPE sheets ma UV resistance a ɛkyɛn so, nanso wɔde anti{1}}akwakoraa aduru a wɔde ka ho no kyerɛ bere tenten-bere a wɔde di dwuma wɔ abɔnten na ama akyɛ.
2.Electrical insulation: HDPE yɛ insulating ade a eye kyɛn so a ɛwɔ dielectric ahoɔden kɛse, na ɛma ɛfata ma anyinam ahoɔden a ɛbɔ ho ban no afã horow.
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HDPE nkratafa abɛyɛ ade titiriw wɔ nnwuma pii mu esiane sɛ ɛyɛ adwuma yiye wɔ mfiridwuma mu, nnuru a ɛyɛ den, nneɛma a atwa yɛn ho ahyia ho adwennwen a ɛpaapae, ne nneɛma a ɛyɛ adwuma yiye nti. Esiane nkɔso a aba wɔ nneɛma ho nyansahu mu nti, HDPE nkrataa no adwumayɛ kɔ so tu mpɔn, na ɛbɛdi dwuma titiriw wɔ mfuw a ɛtrɛw mu daakye.
