PP tɔn (polypropylene board), o ye polimɛri fɛn ye min bɛ kɛ ka caya bi iziniw ni siwili baarakɛcogo la, o bɛ dɔnniya caman dɔnniya don fɛnw dɔnniya la, masinw sɛgɛsɛgɛli la, baarakɛcogo la, ani sigida ladamuni na. Walasa ka PP board ka dilancogo mankutu faamuya kosɛbɛ, an ka kan ka daminɛ ni fɛn in nafa ye min bɛ sɔrɔ a yɛrɛ la, ka hakilina kolomaw sɛgɛsɛgɛ dɔɔnin dɔɔnin minnu bɛ dilan dilancogo la, baarakɛcogo ɲuman na, ani dannaya dafalen{1}}terme.
1. Fɛn minnu bɛ kɛ ka fɛnw mara: PP Board Design ka dantigɛli jɔnjɔnw .
PP pankurun dilanni bɛ gɛlɛya fɔlɔ ni poliporopilini ka molekiyɔmu jɔcogo n’a farikolo cogoya ye. Poliporopilini ye semi-Kristali ye min bɛ sɔrɔ propilɛni monomɛriw ka polimɛri la walasa ka polimɛri sinsinniw dilan ni metili kuluw ye ({2}}CH2) kɔkolo la. A ka cakɛda molekiyɔmuw ka to ka kɛ fɛn in ka kristalɛ ye (a ka c’a la 40%-70%). O jɔcogo in bɛ PP pankurun di a ka jogo jɔnjɔn saba ma: a girinya ka nɔgɔn ani a fanga ka bon, a ka kemikaliya, ani a ka funteni hakɛ.
Ni an ye masinw jateminɛ, PP sɛbɛn ka density bɛ 0,9{{6}0,91 g/cm3 ɲɔgɔn dɔrɔn (nɛgɛ ta 1/8 ɲɔgɔn), o bɛɛ n’a ta, a bɛ waso tension fanga la min ye 30-40 MPa ye (a bɛ caya ka tɛmɛ 60 MPa kan ni gilasi fiyɛli ye). A fana bɛ sɛgɛnlafiɲɛbɔ kunbɛncogo ɲuman jira{{ Nka, a ka modulu min ka dɔgɔn (gPa 1-2 ɲɔgɔn) o kɔrɔ ye ko fɛn caman sɛgɛsɛgɛli bɛ se ka kɛ yɔrɔw la minnu ka spanw ka bon walima minnu ka degun ka bon, o bɛ kɛ sababu ye ka dilancogo ladilanni kɛ ni a bonya ka caya walima a kɔkiliw barika bonya fɛ.
Chemical stability is another major advantage of PP sheet: it is resistant to most acid, alkali, and salt solutions (such as sulfuric acid below 80% concentration and sodium hydroxide at 20%), as well as organic solvents (with a few exceptions, such as concentrated nitric acid and chloroform). This makes it a preferred choice for applications such as chemical tank linings and laboratory countertops. However, it should be noted that high temperatures (>80℃) walima UV sɔrɔli ka mɛn, o bɛ se ka kɛ sababu ye ka cakɛda molekiyɔmu kari, o bɛ na ni kɔrɔya ye (a bɛ kɛ ka a tigi kirin ani ka a ɲɛda wuli). O la, kɛnɛma baarakɛcogo bɛ UV inhibiteurs walima surface coatings farali wajibiya walasa ka lakana.
2. Jɛkulu ka dilancogo mankutuw: Balannako baarakɛcogo wajibiyalenw ni dɛsɛ cogoyaw balan .
PP sɛbɛnw dilanni kɛrɛnkɛrɛnnen ka kan ka sinsin "baarakɛcogo laɲininen" ni "baara dɛsɛ cogoyaw" lamini na. Baarakɛcogo minnu bɛ kɛ tuma caman na, olu ye doni-Baara, sigili, masirili, walima baarakɛcogo jɛlen ye (i n’a fɔ fɛnɲɛnamafagalanw ni banakisɛfagalanw), ka sɔrɔ dɛsɛ cogoyaw bɛ se ka kɛ kari, fɛn tiɲɛni, kemikɛli sɔgɔli, walima sigida degunw kari (ESC) ye.
1. Load-Baarakɛcogo labɛncogo: Koorilen optimisation de stiffness et strengure
Ni PP sɛbɛnw bɛ baara kɛ ni doni ye-bearing components (i n’a fɔ baarakɛminɛnw ani fɛnw bilayɔrɔw), a dilanni bɛ sinsin "deflection" (deformation amount) ani "sara laban" kɔlɔsili kan. Ka kɛɲɛ ni fɛnw mekanikini formulaw ye, fɛn min bɛ se ka dɛmɛ dɔrɔn, o deflection maksimali bɛ sɔrɔ doni na min bɛ tila-tila cogo kelen na, o ye Δ=5QL⁴/(384EI) ye (yɔrɔ min na q ye doni ye, L ye span ye, e ye elastic modulus ye, ani i ye waati ye min bɛ se ka kɛ dakun na). K’a sababu kɛ PP panɛriw ka E hakɛ dɔgɔyali ye, ni plati fla bɛ baara kɛ ni a ye k’a ɲɛsin a ma, deflection (datugulan) min bɛ span janw kɔrɔ, o bɛna tɛmɛ baarakɛcogo wajibiyalen kan kosɛbɛ (a ka c’a la, deflection (dafalen) min bɛ se ka kɛ, o ka dɔgɔ walima a bɛ bɛn 1/200 ma). Fɛn minnu bɛ ɲɛnabɔ, olu ye:
• Ka dɔ fara a bonya kan : a janya fila bɛɛ la, I hakɛ bɛ bonya ni siɲɛ 8 ye (i=BH3/12 ka ɲɛsin kuruwa kɛrɛnkɛrɛnnen ma-yɔrɔ), nka o fana bɛ dɔ fara musaka ni girinya kan.
• Baraji min bɛ don a kɔnɔ : Ni aw ye kurukuruw janya/kɔfɛyɔrɔw digi (1/2-2/3 panɛri janya la, ni a cɛ janya ka dɔgɔn walima a bɛ bɛn panɛri janya siɲɛ 3 ma) panɛli kɔfɛ, o bɛɛ lajɛlen ka inɛsitiri hakɛ bɛ se ka bonya ni 30%-50% ye, ka sɔrɔ ka fɛnw baaracogo dɔgɔya.
• A bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ ka fɛnw ye minnu bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ ka fɛnw ye.
2. Sealing and Connection Design: Fɛn minnu bɛ kɛ ka ɲɛsin ɲɔgɔn ma, olu bɛ se ka kɛ fɔlɔ .
PP panɛriw bɛ kɛ ka caya baarakɛcogo la i n’a fɔ pipe flange sealing ani box splicing. U ka ɲɔgɔndan dilancogo ka kan ka polimɛri fɛnw sirili gɛlɛya yɔrɔ ɲɛnabɔ. Poliporopilini fanga ka dɔgɔn (a bɛ se ka kɛ 30 mn/m ye), o bɛ gɛlɛya don ka jɛɲɔgɔnya ɲuman kɛ ni nɛgɛw ye minnu bɛ kɛ ka a kɛ (i n’a fɔ epoxy resin). O la, farikolo-ɲɛnajɛ-fɛɛrɛw de ka fisa nin cogo in na:
• Hot-Melding welding: Baara kɛ ni PP ka wuliyɔrɔ ye (a bɛ se ka kɛ 160-170 degere ), joli bɛ sumaya fo ka se a fɛnɲɛnamafagalan ma ni funteni marifa walima ultrasonic waves ye, o kɔfɛ, a bɛ degun ka kɛɲɛ ni fuse ye (a fanga ka bon ni 80% ye bangebaga ka fɛn na)
• Clip/Bolt sirili: Dilan plastiki klipuw dilan, walima ka u siri ni pre{0}}Drilled holes ani self{1}}tapping screws ye (a kɔlɔsi ko PP kolanw ka kan ka fara buruburu kunw kan walasa ka degun hakɛ ni kari bali).
• Sealant-A bɛ dɛmɛ: Ni sirili sirili ye wajibi ye, aw bɛ PP furakɛli fɛɛrɛ kɛrɛnkɛrɛnnen dɔ sugandi (a fɔlɔ ka furakɛlifɛn kɛ walasa ka dɔ fara a sanfɛla fanga kan, o kɔ aw bɛ akiriliki nɔrɔlen kɛ a la), walima aw bɛ sigilan caman kɛ (i n’a fɔ silikoni nɔrɔlen) walasa ka yɔrɔ fa.
3. Lamini ladamuni dilancogo: Anti-Kiritigɛ ni baarakɛcogo yiriwali .
Sigida kɛrɛnkɛrɛnnenw kama (i n’a fɔ kɛnɛma,-humidite, ani sigida minnu bɛ oksidan kosɛbɛ), PP sɛbɛn dilanni bɛ jateminɛ wɛrɛw wajibiya baarakɛcogo yiriwali kama:
• UV- Dilancogo min bɛ se ka kɛ : ka karɔbɔni nɛrɛma (2%) walima UV absorbers organiques (i n’a fɔ bɛnzotiriazoliw) fara a kan, o bɛ UV fiɲɛw minɛ walima ka u jɛnsɛn, ka cakɛda molekiyɔmuw tiɲɛni bila kɔfɛ ani ka kɛnɛma baara kɛ ka bɔ san 1-2 la ka se san 5 ma.
• Dilancogo min bɛ kɛ ni fɛn ye/an ye : ka karɔbɔni nɛrɛmuguma (5%-10%), karɔbɔni nanotubuw, walima nɛgɛmuguw fara a kan (i n’a fɔ aliminiyɔmu mugu) bɛ dɔ bɔ a hakɛ resistivity la ka bɔ 10111 Ω·cm (Pp sɛbɛn gansan) la ka se 1011111111111111nan ma (antistatic grade) walima a duguma 103ω·cm (conductive grade). A bɛnnen don ɛntɛrinɛti yɔrɔw tabaga ma ani dugumalan antistatikiw ma gazisow kɔnɔ.
• Antibacterial Design: Loading silver ions, zinc ions, or nano-titanium dioxide (TiO₂) inhibits bacterial growth through photocatalysis or ion release (antibacterial rate >90%). A ka ca a la, a bɛ kɛ dumuniw dilanni fɛnɲɛnamafagalanw na ani furakɛli minɛnw kɔnɔ.
3. Fɛɛrɛbɔ fɛɛrɛw ka gɛlɛyaw inverse kan dilancogo kan .
PP sɛbɛn dilanni fana ka kan ka bɛn a baarakɛcogo ma. Fɛn minnu bɛ se ka kɛ sababu ye ka funteni sɔrɔ, olu bɛ se ka dilan ni fɛɛrɛw ye i n’a fɔ pikiri kɛli, fɛnw bɔli, ani u digidigi, nka taabolo wɛrɛw bɛ dan kɛrɛnkɛrɛnnenw sigi u jɔcogo kunnafoniw kan. I n'a fo:
• A janya bɛ kɛ kelen ye : PP sɛbɛnw minnu bɛ bɔ kɛnɛ kan, olu ka bonya muɲuli bɛ kɛ ±0,5mm ye. Ni dilan bɛ tiɲɛniba de wajibiya (misali la, ±0,2mm), fɛn min bɛ kɛ ka fɛnw bɔ kɛnɛ kan walima a kɔfɛ (misali la, CNC milling) o de ka kan.
• Nkɔni lamini ni a lamini : Nkɔni nɔgɔlenw (r < 0,5mm) pikiri la- PP sɛbɛn nɔgɔlenw ka teli ka degun hakɛ ni kari. O la, nkɔni minnu bɛ dilan na, olu bɛɛ ka kan ka lamini (r min ka bon walima min bɛ bɛn 1mm ma, o ka kan ka kɛ). Ka fara o kan, ni baara filanan (misali la, punching) ka kan, dingɛ dakun janya ka kan ka bonya ka tɛmɛ walima ka kɛɲɛ ni sɛbɛn janya siɲɛ 1,5 ye walasa ka dakun tigɛcogo bali.
• welding compatibility : Ni dilan bɛ kɛ ni ɲɔgɔndan ye, aw bɛ a lajɛ ko kogo janya bɛ to ka kɛ joli la (deviation ka dɔgɔn walima ka bɛn 10% ma). N’o tɛ, yɔrɔ min ka fin, o bɛna wuli ka bɔn fɔlɔ funteni wulilen waati la, o bɛ se ka kɛ sababu ye ka yɔrɔ min ka bon, o bali ka fara ɲɔgɔn kan kosɛbɛ.
Kuncɛli: Dɔnniya kariti dɔ bɔra teori la ka taa waleyali la .
PP pannew dilanni ye fɛnba ye min ye saba{0}}sira balansi ye "fɛnw, baarakɛcogo wajibiyalenw, ani baarakɛcogo gɛlɛyaw." Dilanbagaw ka kan ka poliporopilini ka molekiyɔmuw ka kɛwalew faamuya kosɛbɛ (i n’a fɔ kristalɛsi nɔ min bɛ sɔrɔ gɛlɛya la), o ye fɛnw ye minnu bɛ se ka kɛ sababu ye ka fɛnw labɛn (i n’a fɔ ribs barika bonya bɛ deflection sigi sen kan cogo min na), ani baarakɛcogo dancɛw (i n’a fɔ fillet radius minimum) walasa ka musaka ni baarakɛcogo ɲuman sɔrɔ ka sɔrɔ ka baara kɛcogo sabati. Ni ɲɛtaa bɛ fɛn caman sɛmɛntiya fɛɛrɛw la (i n’a fɔ nanokompozitiw ani bio-poliporopilini basigilen yiriwali), PP pannew dilanni sariyaw bɛna taa ɲɛ, ka fɛnw ɲɛnabɔcogo dafalenw di baarakɛcogo nɔgɔmanw ni baarakɛcogo caman na.
