Overview
Polyurethane is a synthetic polymer formed through the reaction of polyols with diisocyanates. It was first developed in the 1930s and has since become one of the most versatile plastic materials. Polyurethane exists in various forms including flexible and rigid foams, elastomers, adhesives, and coatings. Its properties can be precisely engineered by adjusting the chemical formulation, making it suitable for a wide range of industrial applications.
Physical and Chemical Properties
Polyurethane exhibits excellent mechanical properties including high elasticity, tear strength, and abrasion resistance. These characteristics make it ideal for applications requiring durability under repeated stress. The material also demonstrates good chemical resistance to oils, greases, and many solvents. Its thermal insulation properties are particularly valuable in construction applications. Polyurethane can be formulated to achieve varying degrees of hardness, from soft elastomers to rigid structural components.
Main Applications
In the construction industry, polyurethane is widely used as insulation material for walls, roofs, and pipes due to its excellent thermal properties. It's also commonly applied as spray foam for sealing and insulating buildings. The automotive sector utilizes polyurethane for seating, dashboards, and vibration dampening components. Other significant applications include footwear soles, medical devices, and industrial coatings that require durability and chemical resistance.
Safety and Storage
While cured polyurethane is generally safe, uncured components and processing may require precautions. Isocyanates in particular can be respiratory irritants and sensitizers, requiring proper ventilation and PPE. Storage of raw materials should be in sealed containers below 30°C, away from moisture and direct sunlight. Finished polyurethane products are more stable but should still be protected from extreme temperatures and UV exposure to prevent degradation.
B2B Procurement Guide
When sourcing polyurethane materials, buyers should clearly specify technical requirements including hardness (Shore A or D scale), density, and intended application. These parameters significantly affect performance and pricing. Consider working with suppliers who can provide technical support for formulation adjustments. For large volume purchases, inquire about bulk discounts but verify quality consistency. Lead times may vary based on customization requirements and raw material availability.
Related Manufacturers
- 主营：非沥青基自粘胶膜防水卷材、弹性体sbs改性沥青防水卷材、土工布.土工膜、聚氯乙烯PVC自粘防水卷材、951.911聚氨酯防水涂料、非固化橡胶防水涂料、水固化、丙烯酸防水涂料、喷涂速凝橡胶沥青防水卷材、液体卷材、道桥用防水涂料、外墙防水涂料、高粘抗滑防水涂料、JS防水涂料、基层处理剂、乳化沥青、K11防水涂料、渗透结晶防水涂料、高分子涂膜、种植屋面耐根穿刺防水卷材、铜胎基耐根穿刺防水卷材、PET铝箔防水卷材
- 主营：7n5锑棒、高纯铟、7n8n镉棒、镀膜材料、红外材料、高纯碲块、氧化铟、7n5砷棒、氧化镓、氧化铋、氧化物、高纯铝、高纯磷、锑化铟、氧化锑、碲化铋、催化剂、碲锌镉、金属铜、氧化钪、二氧化锗、高纯碲丸、二氧化硅、高纯碲锭、金属颗粒
- 主营：高纯碲、高纯镉、高纯锌、高纯硫、高纯锑、硫化锂
- 主营：氧化锗、亚碲酸钠、镓铟锡合金、铟锡合金、氧化碲、氧化铋、氧化镓、氧化铟、液态合金、低熔合金、亚碲酸钾
- 主营：氧化锗、氧化碲、氧化铋、高纯材料、光电材料、氧化锡、氧化镓、氧化铟、液态合金、低熔合金
- 主营：四氟板、密封填料、戈尔盘根、密封材料、油浸石棉、四氟弹性带、泥状软填料、陶瓷纤维带、石墨接地线、柔性接地电缆、高压石墨盘根、法兰滤网垫片、硅酸铝纤维绳、陶瓷纤维防火布、柔性石墨复合板
- 主营：PA66、TPEE、玻纤增强PA66、尼龙6原材料、PA66 A3EG6、食品级PA66、耐低温PA66、pa66加纤、PA66阻燃加纤、PPSU、PPS粉、EVA粉末、PA66 FR50、PPA、EVA、PET、LCP、POM、PA6T、高温尼龙、PC ABS、PPS、PA9T、PA46、抗紫外线TPU
- 主营：密封带、陶瓷纤维、法兰垫片、聚四氟乙烯板块、密封垫片、高水基盘根、混编盘根环、高压石棉板、黑四氟盘根、氟橡胶垫片、玻璃鳞片胶泥、碳纤维盘根环、三元乙丙丁腈板、金属复合板垫片
- 主营：戈尔盘根、陶瓷纤维带、四氟弹性带、聚四氟乙烯编织盘根、高水基盘根、石墨接地线
- 主营：特氟龙加工、四氟密封件、微波消解罐、聚四氟乙烯密封件、聚四氟乙烯加工、聚四氟乙烯、聚四氟乙烯加工工艺、四氟波纹管、四氟泛塞圈、特氟龙异型件加工、PTFE异形件加工、PTFE密封件、PTFE零件加工、四氟产品定制加工、工程塑料加工
- 主营：pp板、pp棒、尼龙棒
- 主营：铁氟龙板、PTFE四氟板、四氟弹性带、聚四氟乙烯板、防腐材料、盘根、四氟垫、生料带、膨体四氟板、改性四氟制品、四氟棒、玻璃鳞片涂料
- 主营：PTFE、铁氟龙制品、特氟龙制品、聚四氟乙烯、聚四氟乙烯密封件、聚四氟乙烯加工、聚四氟乙烯加工工艺、塑料王制品、特氟龙加工、四氟密封件、微波消解罐、四氟波纹管、四氟泛塞封、特氟龙异型件加工、PTFE异型件加工、PTFE密封件、PTFE零件加工、四氟加工、PTFE密封圈、密封圈、四氟密封圈、铁氟龙加工、O型密封圈、活塞环、四氟垫片
- 主营：PA66、TPU、ABS、PC、POM、PP、PA6、PET、PA12、POE、HDPE、LLDPE、EVA、PCTG、PA46、PVC、PPS、PPO、AS、HIPS、PMMA、PC-ABS、PETG、ASA、MDPE
- 主营：EPS粒子、相容剂、增韧剂、液体橡胶、粉末丁腈橡胶、功能助剂、工程塑料、部分通用塑料