Polyurethane-ka ku salaysan Polyester-ka (Polyester TPU)

# ## 1. Qeexitaanka Aasaasiga ahTPU ku salaysan Polyester(Polyester TPU) waa nooc ka mid ahelastomer-ka thermoplastic polyurethane, oo ah copolymer-ka isku-dhafan oo si toosan u qaybsan. Qaybihiisa jilicsan waxaa inta badan laga soo qaatay **polyester polyols** (tusaale ahaan, polyadipate glycol, PAG), oo ay samaysay polycondensation of adipic acid (AA) iyo diols (tusaale ahaan, 1,4-butanediol, BDO). Waa mid ka mid ah labada qaybood ee ugu muhiimsanTPU, oo ay weheliso TPU-ga ku salaysan polyether.

## 2. Qaab-dhismeedka Kiimikada & Isku-darka ### Agabka Cayriin ee Aasaasiga ah – **Diisocyanate**: Caadi ahaan **4,4′-diphenylmethane diisocyanate (MDI)** (≈40% qaacidada). – **Polyester Polyol (Qayb Jilicsan)**: Laga sameeyay **adipic acid (AA)** (≈35%) iyo **1,4-butanediol (BDO)**. – **Fidinta Silsiladda (Qayb Adag)**: Diol silsilad gaaban, badanaa **1,4-butanediol (BDO)** (≈25%). ### Habka Polymerization Polyester TPU waxaa lagu sameeyay falgal polymerization** tallaabo-kobac ah: 1. Polyol-ka polyester-ka (qayb jilicsan) wuxuu la falgalaa MDI si uu u sameeyo prepolymer oo leh kooxaha dhammaadka isocyanate. 2. Kahor-polymer-ka waxaa markaa lagu dheereeyaa silsiladda BDO, iyadoo la abuurayo **qaybo adag** (MDI-BDO) iyo **qaybo jilicsan** (polyester polyol). 3. Xidhiidh xooggan oo ah **intermolecular hydrogen** wuxuu ka dhacaa kooxaha ester-ka polar (-COO-) ee qaybaha jilicsan iyo kooxaha urethane (-NHCOO-) ee qaybaha adag, taasoo samaysa shabakad isku xidhka jireed.

## 3. Astaamaha Muhiimka ah ### Astaamaha Farsamada – **Xoog Jilicsan & Jeexitaan Sare**: Ka sarreeya polyeter-kaTPU, sababtoo ah isdhexgalka xooggan ee cidhifyada iyo isku xidhka haydarojiin. – **Awood u adkaysta xoqidda aadka u fiican**: Mid ka mid ah astaamaha ugu fiican, oo ku habboon codsiyada xirashada sare. – **Astaamaha Dabacsanaanta iyo Cadaadiska Wanaagsan**: Adkayn sare iyo awood culays qaadis. – **Aad u adag oo ballaaran**: Waxaa laga samayn karaa Shore A 60 ilaa Shore D 80, iyadoo la isku dheelitirayo dabacsanaanta iyo adkaanta. ### Iska caabbinta Kiimikada & Deegaanka – **Aad u adkaysta Saliidda & Dufanka oo Aad u Fiican**: Aad u adkaysta dareeraha aan cidhifyada lahayn, shidaalka, iyo saliidaha saliidaynta. – **Aad u adkaysta dareeraha wanaagsan**: U adkaysta dareere badan oo dabiici ah (tusaale ahaan, aalkolada, esters). – **Aad u adkaysta kulaylka dhexdhexaadka ah**: Xasillooni kuleyl oo wanaagsan, oo ku habboon isticmaalka joogtada ah heerkulka ilaa 80–100°C. – **Aad u adkaysta hydrolysis oo liidata**: Xidhmooyinka ester-ka ayaa u nugul kala-goynta biyaha, gaar ahaan deegaannada kulul, qoyan, taasoo horseedaysa burbur hantiyeed. – **Dabacsanaanta Heerkulka oo Liita**: Waxay noqotaa mid adag oo jilicsan heerkulka ka hooseeya -20°C. ### Sifooyinka Kale – **Daahfurnaan Wanaagsan**: Darajooyinka cad ama kuwa hufan ayaa la heli karaa. – **Iswaafajin Wanaagsan**: La jaanqaadi kara polymer-yada polar-ka sida PVC, taasoo suurtogalinaysa isku-darka iyo wax-ka-beddelka fudud.

## 4. Codsiyada Caadiga ah Polyester TPU waxaa si weyn loogu isticmaalaa meelaha u baahan xoog farsamo oo sare, iska caabin xoqid, iyo iska caabin saliid: – **Warshadaha & Injineernimada**: Suumanka gudbiyaha, tuubooyinka haydarooliga, shaabadaha, gaskets-ka, duubayaasha, iyo qaybaha u adkaysta xirashada. – **Dharka Kabaha**: Cagaha dibadda, cidhifyada dhexe, iyo qaybaha kabaha si loo helo cimri dherer iyo iska caabin saliid. – **Gawaarida**: Qalabka gudaha, jaakadaha fiilada, daboolka bacaha hawada, iyo qaybaha nidaamka shidaalka. – **Dahaadhka & Ku-dhejinta**: Dahaarka waxqabadka sare leh ee dharka, biraha, iyo balaastikada; dhejiska qaab-dhismeedka. – **Silig & Fiilo**: Jaakadaha fiilooyinka warshadaha ee u baahan iska caabin saliid iyo xoqid. – **Ciyaaraha & Madadaalada**: Kabaha barafka, taayirada barafka ee gudaha, iyo qaybaha qalabka isboortiga.

## 5. Isbarbardhigga Polyether TPU | Hantida | Polyester TPU | Polyester TPU | |:— |:— |:— | | **Qaybta Jilicsan** | Polyester Polyol (tusaale ahaan, PAG) | Polyether Polyol (tusaale ahaan, PTMEG) | | **Awoodda Gacmaha** | Sare | Dhexdhexaad | | **Adkeysiga Xabagta** | Aad u Fiican | Wanaagsan | | **Adkeysiga Saliidda/Dareeraha** | Aad u Fiican | Dhexdhexaad | | **Adkeysiga Haydarooliga** | Liita | Aad u Fiican | | **Dabacsanaanta Heerkulka Hoose** | Liita | Aad u Fiican | | **Qiimaha** | Hoose | Sare |

## 6. Habaynta & Maareynta - **Hababka Habaynta**: Waxaa lagu farsamayn karaa iyadoo la adeegsanayo farsamooyinka caadiga ah ee thermoplastic: qaabaynta duritaanka, fidinta, qaabaynta afuufidda, iyo kala-soocidda. – **Shuruudaha Qallajinta**: Waa in si fiican loo qalajiyaa (80–100°C 2–4 saacadood) ka hor inta aan la farsamayn si looga hortago biyo-baxa iyo xumbo. – **Heerkulka Qaabaynta**: Caadiyan 180–220°C, iyadoo ku xiran heerka gaarka ah iyo adkaanta.

## 7. Faa'iidooyinka & Xaddidaadaha ### Faa'iidooyinka - Xoog farsamo oo heer sare ah iyo iska caabin xoqid. - Iska caabin saliid iyo kiimiko oo aad u fiican. - Iswaafajin wanaagsan oo leh walxaha cidhifka ah. - Kharash yar marka la barbar dhigo TPU-ga polyether.