简体中文
Processing temperature, specific gravity and shrinkage of plastics
材料收缩率是指制件在成型温度下尺寸与从模具中取出冷却至室温后尺寸之差的百分比。它反映的是制件从模具中取出冷却后尺寸缩减的程度。影响收缩率的因素有：材料品种、成型条件、模具结构等。不同的高分子材料的收缩率各不相同。其次材料的收缩率还与塑件的形状、内部结构的复杂程度、是否有嵌件等有很大的关系。Material shrinkage refers to the percentage of the difference between the size of the part at the forming temperature and the size after taking it out of the mold and cooling to room temperature. It reflects the degree of size reduction after the workpiece is taken out of the mold and cooled. The factors affecting the shrinkage are: material variety, forming conditions, die structure and so on. The shrinkage of different polymer materials is different. Secondly, the shrinkage of the material is also closely related to the shape of the plastic part, the complexity of the internal structure and whether there are inserts.
常用材料收缩率及其他参数如下：
Common material shrinkage and other parameters are as follows:
|
简称 abbreviation |
中文 chinese name |
比重 density |
收缩率 Shrinkage% |
料筒温度 Barrel temperature |
模温 Mold temperature |
| LDPE | 低密度聚乙烯 | 0.92 | 3 | 220~260 | 20~40 |
| HDPE | 度密度聚乙烯 | 0.96 | 3 | 190~280 | 30~70 |
| PP | 聚丙烯 | 0.91 | 2 | 210~280 | 20~50 |
| PVC | 聚氯乙烯 | 1.38~1.41 | 1.5 | 170~190 | 20~40 |
| ABS | 丙烯－丁二烯－苯乙烯 | 1.05 | 0.6 | 210~260 | 50~80 |
| AS | 丙烯－苯乙烯 | 1.07 | 0.6 | 220~270 | 40~80 |
| BS | 丁二烯－苯乙烯 | 1.01 | 0.5 | 190~230 | 30~50 |
| GPPS | 通用聚苯乙烯 | 1.16 | 0.3~0.6 | 200~250 | 40~60 |
| HIPS | 高冲击聚苯乙烯（改苯） | 1.08 | 0.5 | 210~270 | 20~50 |
| EVA | 乙烯－醋酸乙烯脂 | 0.95 | 2 | 140~200 | 20~40 |
| PMMA | 聚甲基丙烯甲脂 | 1.18 | 0.6 | 220~240 | 60~80 |
| PA6 | 聚酰胺－６ | 1.13 | 0.7-1 | 250~270 | 40~60 |
| PA66 | 聚酰胺－６６ | 1.13 | 1.3 | 280~300 | 40~60 |
| PA66+30%GF | 聚酰胺－６６＋３０％玻纤 | 1.39 | 0.3 | 240~270 | 80~90 |
| POM | 聚甲醛 | 1.42 | 2.1 | 205~225 | 80~100 |
| PC | 聚碳酸脂 | 1.2 | 0.5 | 271~293 | 71~93 |
| PET | 聚对苯二甲酸乙二醇脂 | 1.33 | 0.4 | 277~293 | 15~30 |
| PET+30%GF | 聚对苯二甲酸乙二醇脂＋３０％玻纤 | 1.67 | 0.2 | 265~305 | 95~150 |
| PETG | 改性聚酯 | 1.27 | 0.2~0.5 | 250~270 | 15~40 |
| PCTG | 改性聚酯 | 1.23 | 0.2~0.5 | 275~295 | 15~40 |
| PBT | 聚对苯二甲酸丁二醇脂 | 1.4 | 1.5~2.2 | 225~245 | 40~80 |
| PBT+30%GF | 聚对苯二甲酸丁二醇脂 | 1.61 | 0.4~0.9 | 225~250 | 40~100 |
| PCT+30%GF | 改性聚酯＋３０％玻纤 | 1.45 | 0.1~0.4 | 295~370 | 105~135 |
| CA | 醋酸纤维素 | 1.26 | 0.5 | 160~230 | 40~60 |
| CAP | 丙酸纤维素 | 1.2 | 0.5 | 215~240 | 40~75 |
| CAB | 丁酸纤维素 | 1.19 | 0.5 | 230~250 | 40~85 |
| PP耐高温 | 耐高温聚丙烯 | 1.12 | 0.9~1.1 | 180~220 | 60~80 |
| PP防火 | 防火聚丙烯 | 0.95 | 1.4 | 180~220 | 30~50 |
| PPS+40%GF | 聚苯硫醚＋４０％玻纤 | 1.67 | 0.25 | 300~340 | 120~150 |
| PPO | 聚苯醚 | 1.07 | 0.5~0.8 | 270~310 | 70~93 |
| PSU | 聚砜 | 1.24 | 0.5 | 330~360 | 120~160 |
| PES | 聚醚砜 | 1.37 | 0.68 | 340~380 | 120~160 |
| LCP | 液晶聚合物 | 1.7 | 0.02 | 385~400 | 35~200 |
| SBS | 苯乙烯嵌段共聚物 | 0.96~1.1 | 1.5 | 145~160 | 25~30 |
| SEBS | 氢化苯乙烯嵌段共聚物 | 0.87~0.91 | 1.6 | 180~220 | 35~65 |
| TPU | 热塑性聚氨脂 | 1.24 | 1.2 | 190~220 | 24~49 |
| TPV | 完全硫化聚烯烃弹性体 | 0.97 | 1.5~2.5 | 180~190 | 10~80 |
| TPEE | 聚酯弹性体 | 1.2 | 1.4 | 220~250 | 45 |