Shanghai Daoqin Plastics Co., Ltd.

tpu材 material is thermoplastic polyurethane (TPU) resin material, is types soft resin. main/primary has polyester type and polyether type type, 英文名称 is: Thermoplastic polyurethanes.

一, features

1, excellent force property can.

2, good wear resistant anti slip property.

3, good low temperature flexibility property.

4, good processing molding property and fast speed molding property.

5, good property, easy solvent understanding property and low temperature combined property.

6, excellent transparent property and heat resistant resistant property and other.

二, classification

according to applications property can 进行划 separation, main/primary separation is: polyester type, polyether type, hot melt adhesive film, foaming type and high temperature resistance type and other.

三, application areas

1, can 穿戴: ring tpu table/sheet belt/tape and tpu手 machine sleeve/set.

2, clothing/apparel made 鞋: 如tpu footwear materials gas 垫, large and and other.
                          

3, industrial engineering: 如tpu传输 belt/tape and adhesion agent and other.

4, automotive field/area: used for 换档拉杆手柄, various 联轴节 轴 sleeve/set and gasket, various 线束 接插 parts, 螺旋伸 shrink electrical 线, cable jacket, belt/tape, toward 拉杆 护 sleeve/set and sheet/slice, 悬挂联 combined 铰链, liquid pressure gas 动, 悬挂隔 film, decrease film, decrease device, elastic 簧限位 fast and other, also can and other plastics or composite/compounding use, used for automotive 保险杠, safety gas 囊, anti and other parts.

5, field/area: 如运动溜冰鞋 and 旱冰鞋 and other.

6, 家居生 active: coating 布tpu.

7, electronics electrical appliances: 如tpu overmolding.
                                  
四, tpu材 material excellent disadvantages

advantages: tpu材 material tool has excellent oil resistant, resistant water, resistant 霉菌且 machine strong/high degree high, products can force strong/high, resistant property and processing properties good and other.

disadvantages: tpu材 material time long 会发生 yellowing, although upper has resistant UV yellowing Raw Materials, this type of material is decrease light formed product yellowing, can 根本 改变 yellowing.
五, use precautions

1, tpu材 material dry: is TPU easy wet and easy hydrolysis features, 未充沛烘 dry TPU质 material easy processing difficult, processing front must 进行充 separation drying. use color powder or masterbatch color, must and TPU本 property pellets mixed combined rear, 一同进行 drying. generally selection ring gas drying device or remove wet drying device dry TPU, according to hardness different, dry temperature degree is 80-110℃, time is 3 small left right.

2, extrusion processing: L/D ratio in 20-30 between, shrink ratio in 2-4 between mono 螺桿三段式 extrusion machine combined 于TPU processing, screw and material tube/pipe 空隙约 is 0.1-0.2mm, screw speed setting 于25-60rpm scope/range.

3, injection molding processing: is TPU in melt tool has high viscosity, in material tube/pipe simple high force loss bad TPU自身 material property, therefore generally selection screw long 径L/D ratio 16-20 left right, shrink ratio is 2.0-25 injection molding machine comparison 适宜.

4, tpu raw materials upper color:   color powder: 0.2-0.5% color masterbatch: 1-4%.