Overview
Special linear polyurethane is a synthetic polymer characterized by its linear molecular structure, which distinguishes it from cross-linked polyurethanes. This structural feature provides unique combinations of flexibility, strength, and processability. Developed as part of the polyurethane family in the mid-20th century, linear polyurethanes have become essential in various industrial sectors due to their tunable properties. Manufacturers can adjust the polymer's characteristics by varying the diisocyanate and polyol components during synthesis.
Physical and Chemical Properties
The material exhibits notable mechanical properties including tensile strength ranging from 20-50 MPa and elongation at break of 300-600%. These characteristics make it superior to many rubbers and plastics in dynamic applications. Chemically, linear polyurethanes demonstrate good resistance to oils, greases, and many solvents, though they may degrade under prolonged UV exposure or in strongly acidic/alkaline environments. The material's thermal stability typically ranges from -40°C to 120°C, with some specialty formulations exceeding these limits.
Main Applications
In industrial settings, special linear polyurethane is extensively used for producing high-performance elastomers for seals, gaskets, and bushings that require both flexibility and durability. The automotive industry utilizes these materials for vibration-damping components. The coatings industry values its abrasion resistance for protective surface treatments, while the adhesive sector employs specific formulations for bonding dissimilar materials. Emerging applications include 3D printing filaments and medical device components where biocompatible grades are available.
Safety and Storage
While generally stable, raw material handling requires precautions. Isocyanate-containing precursors may require dedicated storage areas with proper ventilation. Processed polyurethane typically poses lower risks but may generate hazardous fumes if overheated during processing. Finished products should be stored in original packaging at temperatures below 30°C with relative humidity maintained below 60%. Bulk storage of pellets or sheets should avoid direct floor contact and use pallets for proper air circulation to prevent moisture absorption.
B2B Procurement Guide
Industrial buyers should clearly specify technical parameters including Shore hardness (typically A70-D55), tensile strength requirements, and chemical resistance needs. For coating applications, viscosity and curing characteristics become critical specifications. Consider minimum order quantities (MOQs) which typically range from 500kg for standard grades to 50kg for specialty formulations. Lead times vary from 2-8 weeks depending on formulation complexity. Quality certifications like ISO 9001 and RoHS compliance should be verified, especially for export-oriented purchases.
Related Manufacturers
- 主营：特殊线性聚氨酯、阻燃v0pc、基础创新塑料pc
- 主营：聚氨酯黑白料
- 主营：聚氨酯保温管、聚氨酯发泡保温管、直埋式预制保温管、预制直埋保温管
- 主营：真空绝热板、酚醛保温板、真空板、聚氨酯保温板、聚氨酯板、硬泡聚氨酯板、酚醛板、保温装饰一体板
- 主营：钢套钢蒸汽保温管、钢套钢固定节、钢套钢疏水节、聚氨酯保温弯头、钢套钢保温补偿器、井壁密封装置、保温防水端封
- 主营：喷涂防水、管壳保温、喷涂冷库、聚氨酯壳、发泡聚氨酯、聚氨酯管托、聚氨酯管壳、硬质聚氨酯、冷库聚氨酯、聚氨酯预制、泡沫聚氨酯、保温聚氨酯、聚氨酯喷涂、聚氨酯瓦壳、聚氨酯管瓦壳、保温管聚氨酯、喷涂发泡、瓦壳保温管、预制直埋管、钢套钢预制
- 主营：窑密封、化工窑、复合板、聚氨酯、密封板、鱼鳞片、密封件、回转窑、裂解窑炉、密封气体、不漏气窑头、工业窑炉密封、窑炉气体密封
- 主营：石墨聚苯板、聚苯板、岩棉板、聚氨酯板、eps聚苯乙烯泡沫板、闭孔板、聚合聚苯板、挤塑板、防水背衬板、橡塑保温、铁皮保温、岩棉复合板、免拆一体板、保温与结构一体化板、岩棉管、硅酸铝管、玻璃棉管
- 主营：纤维喷涂、无机纤维喷涂、装饰线条、聚氨酯喷涂、聚氨酯保温喷涂、聚氨酯喷涂施工、聚氨酯发泡喷涂、硬泡聚氨酯喷涂、玻璃纤维针刺毡、eps装饰线条、吸音无机喷涂棉、eps线条、岩棉线条、聚苯线条、超细无机纤维喷涂、外墙保温无机纤维、超细矿物无机纤维喷涂、泡沫线条、EPS造型线条、欧式线条、eps外墙装饰线条、别墅装饰腰线造型、欧式装饰线条
- 主营：护套管、防尘罩、柱窝填充物、聚氨酯制品、立柱保护套、立柱护套、高压胶管、立柱填充、硅胶护套、阻燃护套、防尘防水、橡胶护线、双抗护套、胶管护套、液压支架、胶管电缆、液压油管、高压油管、油管护套、阻燃保护套、硅橡胶护套、螺旋保护套、阻燃防静电、立柱防尘套、护线圈、螺旋缠绕管
- 主营：聚氨酯板、聚氨酯筛板、聚氨酯包胶轮、皮带清扫器、旋流器、橡胶弹簧
- 主营：聚氨酯、工程塑料
- 主营：建筑真空板、真空绝热板、阳光房隔热板、隧道聚氨酯板、外墙聚氨酯板、聚氨酯复合板、无机聚氨酯板、隧道用聚氨酯板、建筑外墙真空板
- 主营：防火阻燃PC、PA66、ABS、聚氨酯、TPU、工程塑料POM、PBT、PP、HDPE、工程塑料
- 主营：臭味剂、变色剂、防丢水剂、聚氨酯保冷管壳、聚氨酯管壳、聚氨酯弯头、抑尘剂、固体臭味剂、防冻液、煤炭抑尘剂、匀质板、石墨匀质板、防水背衬板、幕墙背衬板、瓷砖背衬板
- 主营：振动筛、回收机、模压垫片、聚氨酯制品、聚氨酯筛板、聚氨酯异形件、模压制品、泥沙分离器、水力旋流器、清洗震动筛网、水力旋流设备、减震块缓冲垫、密封件缓冲块、泥沙水分离器、泥沙分离渣浆泵