Polyurethane nke dabeere na Polyester (Polyester TPU)

# ## 1. Nkọwa IsiTPU dabere na polyester(Polyester TPU) bụ ụdịihe elastomer nke polyurethane thermoplastic, otu copolymer nke a na-ekewa n'ahịrị. Akụkụ ya dị nro bụ isi sitere na **polyester polyols** (dịka ọmụmaatụ, polyadipate glycol, PAG), nke polycondensation nke adipic acid (AA) na diols (dịka ọmụmaatụ, 1,4-butanediol, BDO) mepụtara. Ọ bụ otu n'ime ụdị abụọ bụ isi nkeTPU, tinyere TPU nke dabere na polyether.

## 2. Nhazi Kemịkalụ na Nhazi ### Ihe Ndị Dị Mkpa – **Diisocyanate**: Dịka ọ na-adịkarị **4,4′-diphenylmethane diisocyanate (MDI)** (≈40% nke usoro). – **Polyester Polyol (Ngalaba Dị Nro)**: Ejiri **adipic acid (AA)** (≈35%) na **1,4-butanediol (BDO)**. – **Ngalaba Agbụ (Ngalaba Siri Ike)**: Diol dị mkpụmkpụ, nke na-abụkarị **1,4-butanediol (BDO)** (≈25%). ### Usoro Polymerization Polyester TPU na-emepụta site na mmeghachi omume polymerization nke **usoro-eto eto**: 1. Polyester polyol (ngalaba dị nro) na-emeghachi omume na MDI iji mepụta prepolymer na otu njedebe isocyanate. 2. A na-agbatịkwu prepolymer ahụ na BDO, na-emepụta akụkụ siri ike nke na-agbanwe agbanwe (MDI-BDO) na **ngalaba dị nro** (polyester polyol). 3. Njikọ hydrogen dị ike nke na-ejikọta isi na molekul na-eme n'etiti otu ester polar (-COO-) na ngalaba dị nro na otu urethane (-NHCOO-) na ngalaba siri ike, na-emepụta netwọk njikọ anụ ahụ.

## 3. Njirimara Ndị Dị Mkpa ### Njirimara Mechanical – **Ike Nrụgide Dị Elu na Ịdọwa**: Ka mma karịa polyetherTPU, n'ihi mmekọrịta siri ike na njikọ hydrogen. – **Nguzogide Abrasion Magburu Onwe Ya**: Otu n'ime njirimara ya kachasị pụta ìhè, dị mma maka ojiji dị elu. – **Njirimara Mgbakwụnye na Mkpakọ Dị Mma**: Nkwụsi ike dị elu na ikike ibu ibu. – **Ngalaba Ike Dị Ukwuu**: Enwere ike ịmepụta site na Shore A 60 ruo Shore D 80, na-edozi ike na nkwụsi ike. ### Nguzogide Kemịkalụ na Gburugburu Ebe Obibi – **Nguzogide Mmanụ na Mmanụ Dị Mma**: Nkwụsi ike dị ukwuu na ihe mgbaze na-abụghị polar, mmanụ ọkụ, na mmanụ na-ete mmanụ. – **Nguzogide Ihe Mgbaze Dị Mma**: Nkwụsi ike dị mma na okpomọkụ, dabara adaba maka ojiji na-aga n'ihu na okpomọkụ ruo 80–100°C. – **Nguzogide Hydrolysis Na-adịghị Mma**: Njikọ ester nwere ike ịgbawa site na mmiri, karịsịa na gburugburu ebe ọkụ na iru mmiri, na-eduga na mmebi ihe onwunwe. – **Ngbanwe Okpomọkụ Dị Ala Na-adịghị Mma**: Na-aghọ ihe siri ike ma gbajie agbawa na okpomọkụ dị n'okpuru -20°C. ### Àgwà Ndị Ọzọ – **Ezigbo Nghọta**: Enwere ike ịnweta akara doro anya ma ọ bụ nke na-enweghị nghọta. – **Ezigbo Ndakọrịta**: Dakọtara na polarị dịka PVC, na-eme ka ngwakọta na mgbanwe dị mfe.

## 4. Ngwa Ndị A Na-ejikarị Eme Ihe A Na-eji Polyester TPU eme ihe n'ọhịa ndị chọrọ ike igwe dị elu, iguzogide abrasion, na iguzogide mmanụ: – **Ụlọ Ọrụ na Injinịa**: Belt conveyor, hoses hydraulic, seals, gaskets, rollers, na akụkụ ndị na-anaghị eyi. – **Ụdị Akpụkpọ ụkwụ**: Akpụkpọ ụkwụ dị n'èzí, ụkwụ etiti, na ihe ndị dị n'akpụkpọ ụkwụ maka ịdịte aka na iguzogide mmanụ. – **Ụgbọala**: Ihe e ji achọ mma ime ụlọ, jaketị eriri, mkpuchi akpa ikuku, na ihe ndị dị n'ime sistemu mmanụ. – **Mkpuchi na ihe e ji achọ mma**: Ihe e ji achọ mma akwa, ọla, na plastik; ihe e ji achọ mma. – **Waya na eriri**: Ihe e ji achọ mma maka eriri ụlọ ọrụ chọrọ iguzogide mmanụ na abrasion. – **Egwuregwu na Ntụrụndụ**: Akpụkpọ ụkwụ ski, wiil skate inline, na akụkụ akụrụngwa egwuregwu.

## 5. Ntụnyere na Polyether TPU | Ngwongwo | Polyester TPU | Polyether TPU | |:— |:— | | **Ngalaba Dị Nro** | Polyester Polyol (dịka ọmụmaatụ, PAG) | Polyether Polyol (dịka ọmụmaatụ, PTMEG) | | **Ike Nrụgide** | Elu | Ọkara | | **Nguzogide Abrasion** | Dị Mma | | **Nguzogide Mmanụ/Mgbaze** | Dị Mma | Ọkara | | **Nguzogide Hydrolysis** | Dịghị Mma | Dị Mma | Dị Ala - Okpomọkụ** | Dịghị Mma | Dị Mma | Dị Mma | | **Ọnụahịa** | Dị Ala | Kachasị Elu |

## 6. Nhazi na Njikwa – **Ụzọ Nhazi**: Enwere ike iji usoro thermoplastic ọkọlọtọ hazie ya: ịkpụzi ihe n'ime mmiri, ịpụpụ ya, ịkpụzi ihe n'ime mmiri, na ịchacha ya. – **Ihe achọrọ maka ịkpọ nkụ**: A ga-akpọrịrị ya nke ọma (80–100°C maka awa 2–4) tupu a hazie ya iji gbochie mmiri ịmịpụta na ịfụ. – **Okpomọkụ Ịkpụzi ihe**: Ọ na-adịkarị 180–220°C, dabere na ọkwa na ike kpọmkwem.

## 7. Uru na Mmachi ### Uru - Ike igwe na iguzogide abrasion pụrụ iche. - Nguzogide mmanụ na kemịkalụ dị mma. - Ndakọrịta dị mma na ihe ndị dị na polar. - Ọnụ ego dị ala ma e jiri ya tụnyere polyether TPU.