在生產過程中通常必須將收縮性考慮在內:
1、工件脫模
當工件含有型芯或鏤空部分時,隨著彈性體的收縮,它會緊緊地裹住模具的這些部位,使工件脫模變得很困難。模具設計、模具表面光潔度以及加工條件都能夠縮小這種影響,甚至使自動化脫模也成為可能。
2、模塑條件
模塑條件能顯著地影響收縮的程度和本質。若從高應力狀態很快地變為低應力狀態,收縮的程度將會增加。工件的迅速冷卻以及很高的注射速度或壓力,也能影響收縮性。
3、設計方面的考慮
考慮到收縮性,模具必須加工得比工件所需的尺寸稍大些。通常,實際收縮值只有等到具體工件成型時才能得知。因此,事先保守一些總是。若有可能,可使用原型模具。
| 產品說明Product description | ||||||||
| ·RN50B2-01是一款高性能材料,具有良好的抗沖擊和抗疲勞性能。 ·RN50B2-01 is a kind of high performance material which has excellent impact resistance and fatigue resistance properties.
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| 關鍵特性Key characteristic | ||||||||
| 1.表面光亮Bright surface. 2..可噴油,絲印,上膠水,油墨Oil injection,silkscreen,can be applied with glue and ink. 3.彈性優良,易成型Excellent elasticity,easy molding. | ||||||||
| 功能Function | ||||||||
| 產品應用 Main application | 玩具公仔Toy dolls | 運動器材Sports equipment | ||||||
| 鞋材 Shoe material |
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| 加工方法Processing method | 注塑成型Injection molding | |||||||
| 環保認證 Environmental certification | ROHS | REACH | EN71-3 | |||||
| PAHS | ASTM-F963 | Phthalate | ||||||
| 顏色Color | 乳白色Milky-white | |||||||
| 氣味Smell | 少許樹脂味A little resin smell | |||||||
| 外型Appearance | 圓球形小顆粒Cylindrical particle,about 3mm×1.5mm | |||||||
| 儲藏期Storage period | 常溫下通風干燥,12個月Ventilated dry at normal temperature,about 12 months | |||||||
| 包裝方式Packaging method | 25公斤/袋 25kg/bag | |||||||
| 物理性能Physical properties | 結果Result | 單位Unit | 方法Method | 成型條件Molding condition | ||||
| 比重Specific gravity | 1.02±0.02 | g/cm3 | ASTM D792 | 干燥溫度Drying temp | ||||
| 硬度Hardness | 50±5 | shoreA | ASTM D2240 | 干燥時間Drying time | ||||
| 拉伸強度Tensile strength | >3 | Mpa | ASTM D412 | 射嘴溫度Nozzle temp 180℃ | ||||
| 斷裂延伸Elongation at break | >300 | % | ASTM D412 | 螺筒一段溫度Screw 1 temp 170℃ | ||||
| 撕裂強度Tearing strength | >16 | Kn/m | ASTM D624 | 螺筒二段溫度Screw 2 temp 160℃ | ||||
| 熔融指數Melt index | >6 | g/10min | ASTM D1238 | 螺筒三段溫度Screw 3 temp 150℃ | ||||
| 注意事項Matters need attention | ||||||||
| 清洗料管 Purge compound | 需使用PP或 PE清洗干凈機臺螺桿,且把機臺射嘴清除干凈Please make sure you that you have cleaned the machine screw with PP or PE, and put the machine nozzle thoroughly clean. | |||||||
| 著色 Coloring
| 請選擇以PE或EVA為基材之色母,切勿使用以PVC為基材者。另外加工時請采用較高的螺桿轉速和較高的背壓,才能讓著色劑達到較好的分散效果Please select color master batch on PE or EVA material with the exception of PVC.Higher screw speed are backpressure are needed for better colorant dispersion. | |||||||
| 回收 Recycling | 二次料(水口料)回收比率建議最多20%. Consistent regrind usage of up to 20% is permissible. | |||||||


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