TPU-Covestro Desmopan 385S
폴리에스터계 폴리우레탄의 극한 기계적 강도와 폴리에테르의 뛰어난 가수분해 안정성을 결합하려면 특수한 분자 구조가 필요한데, Covestro의 Desmopan 385S(프리미엄 300 시리즈에 속함)가 이를 제공합니다. 밀도 1.20 g/cm³, 경도 85 쇼어 A를 자랑하는 이 가수분해 안정화 에스터 등급은 최대 인장 강도 50.5 MPa와 극한 DIN 내마모성(30 mm³ 손실)을 제공합니다. 주청 프리시전은 ISO 9001 및 IATF 16949 인증 품질 시스템 하에서 Desmopan 385S의 정밀 성형을 전문으로 합니다. 5축 CNC에서 연마된 S136 스테인리스 강 금형을 사용하여 복잡한 1.0%~2.0% 탄성 수축률을 제어하고, Zeiss CMM으로 검증된 무결점 다이나믹 씰 부품을 보장합니다.
Desmopan 385S Structural Performance & Mechanical Resistance Profile
Desmopan® 385S belongs to the elite 300 Series of thermoplastic polyurethanes engineered by Covestro, certified to deliver maximum tensile strength, hydrolysis stabilization, and superior rebound resilience under ISO standards:
| 물리적 및 강도 파라미터 | Desmopan 385S Spec Values | 성형 및 최종 사용 이점 |
|---|---|---|
| 인장 극한 강도 | Ultimate Tensile Strength 50.5 MPa | Exhibits extremely high mechanical tensile limit compared to standard TPU (typically 30-35 MPa), preventing structural deformation under extreme tension. |
| Abrasion & Tear Resistance | DIN Loss 30 mm³ / Tear 70 kN/m | Delivers outstanding mechanical wear protection and tear resistance, preventing crack propagation in dynamic structural parts and screenpacks. |
| Dynamic Recovery | Rebound Resilience 42% | High dynamic elastomeric spring-back properties prevent deformation, securing long-term sealing repeatability in dynamic industrial gaskets. |
Technical & Fluidic Process Configurations for Hydrolysis-Stabilized Desmopan 385S
With its high-strength block copolymer matrix and hydrolysis stabilization, Desmopan 385S processes reliably inside high-heat systems:
| 성형 기술 등급 | 공정 호환성 및 운영 세부 사항 |
|---|---|
| Hydrolysis-Stabilized Technical Parts | Excellent. Fully optimized for high-temperature water mixer valves, fuel caps, water meter connectors, and municipal hot-water plumbing pipes. |
| High-Strength Screenpacks & Hoses | Excellent. Low chemical swelling under high humidity. Ideal for heavy-duty industrial hoses, screenpacks, and fluidic gaskets. |
| Dynamic Low-Wear Industrial Seals | Excellent. Low compression set (30% at 23°C) and outstanding DIN wear resistance are perfect for hydraulic gaskets and dynamic seals. |
TPU-Covestro Desmopan 385S Tooling & High-Strength Molding Blueprint
Molding an amorphous high-strength polymer like Desmopan 385S requires strict thermal boundaries and low-stress mold setups to prevent flashing:
미크론 수준 플래시 제어(툴링 정밀도)
Because Desmopan 385S exhibits exceptional fluidity under high shear, the molten resin can seep easily into minor mold gaps, causing parting line flash. Jucheng’s tooling division uses 5-axis CNC machines to achieve micro-tolerances, keeping mold parting clearances strictly within 0.005mm on premium S136 stainless steel mold cavity blocks hardened to 48-52 HRC.
Rigorous Pre-Drying Protocol
Wet polyester-based TPU experiences severe hydrolytic chain cleavage at high melt temperatures, destroying its high impact strength and causing surface splay. We pre-dry the raw resin in desiccant hopper dryers at 70°C–110°C (158°F to 230°F) for 1–2 hours, keeping moisture strictly below 0.05% before molding.
Key Application Fields for TPU-Covestro Desmopan 385S
- 산업 인프라 및 기계: High-pressure industrial hydraulic gaskets, screenpacks, dynamic oil seals, dynamic expansion plugs, and protective sleeves.
- 자동차 파워트레인 및 섀시(IATF 16949): 고온 더스트 벨로우즈, 스티어링 랙 보호 슬리브, 진동 감쇠 그로밋 및 섀시 씰.
- Potable Water & Food Contact Systems: Faucet mixing valve seals, water meter connection rings, domestic water piping gaskets, chemical-resistant hoses, and couplers.
속성
| 밀도 | 1.2 g/cm³ |
| 경도(쇼어 A, 15초) | 85 - 86 - |
| 경도(쇼어 D, 15초) | 32 - |
| Ultimate Tensile Strength | 50.5 MPa |
| 인장 신율 (파단 시, DAM) | 583 % |
| 100% 신장 시 인장 응력 | 5.7 MPa |
| 300% 신장 시 인장 응력 | 15 MPa |
| Tear Strength (Propagation, ISO 34-1) | 70 kN/m |
| DIN Abrasion Resistance (Loss) | 30 mm³ |
| Rebound Resilience | 43 % |
| 압축 영구 변형률 (23°C, 72시간) | 30 % |
| Compression Set (70°C, 24h, Method C) | 25 % |
| 선형 수축률 | 1.0 - 2.0 % |
| 최대 부품 크기 | 800 x 600 mm |
| 최소 부품 크기 | 1 x 1 mm |