Shanghai Daoqin Plastics Co., Ltd.

1, soft PVC in has soft/flexible agent （ this is soft PVC and hard PVC difference ）, easy 变脆, easy 保存, therefore its use scope/range to 局限. hard PVC不含 soft/flexible agent, therefore flexibility property good, easy molding, easy 脆, 无毒无污染, time long, therefore tool has very large development application value.

2, application different

soft PVC generally used for sheet/plate, sheet/plate and leather table/sheet 层; hard polyvinyl chloride (PVC) main applications hard 质PVC pipe/tube and pipe fittings, type 材.

3, property different

soft pvc density 1.16~1.35g/cm³, water absorption 0.15~0.75%, 玻璃化转变 temperature degree 75~105℃, molding shrinkage 10~50×10-³cm/cm, tensile fracture strong/high degree 10~24MPa, pressure shrink strong/high degree 6~12MPa,

versus for elongation 200~450%, hardness Shore A 50~100, 线膨胀系数70~250×10-⁶mm /mm·℃, hot rate 0.7~1.0×10-⁵/(m·K), electrical strong/high degree (short 时)11.8~15.7×I0-³V/mm.

hard pvc usually is 40-100mm, inner light slip retardant force small, 不结垢, 无毒, 无污染, corrosion resistant. use temperature degree large 于40 degree, is cold water tube/pipe. anti-aging property can good, flame resistant, can use 橡胶圈 flexible 连接安装.