有幾個概念，如彈性、打擊彈性(回彈性)、彈性與模量、壓縮變形、扯斷變形等，它們之間的關系，不易表述清楚，現將個人的理解提出與大家討論。
彈性——橡膠的彈性應是理論上的一個概念，它表示橡膠分子鏈段和側基內旋轉的難易程度，或是橡膠分子鏈柔順及分子間作用力的大小。對于硫化橡膠，其彈性還與交聯網絡密度及規整性有關。
彈性與扯斷變形——我們常說天然橡膠的彈性很好，但它的扯斷變形往往是很大的，這主要是天然橡膠伸長率很大，伸長過程中造成網絡的破壞及分子鏈的位移很大，斷裂后的恢復歷程長和不可恢復的部分增加。如果以定伸長的變形作比較，天然橡膠的變形就不一定很大了。
打擊彈性或回彈性是在定負荷(或定能量)條件下測定的，其彈性的大小與硫化膠的交聯程度或模量有直接的關系，表述的是橡膠彈性和粘性(或吸收)的綜合。
| 產品說明Product description | ||||||||
| ·SU90A-01是一款高性能新型的高分子材料，具有優異的耐磨、耐污耐舊、耐熱性能。 ·SU90A-01is a new kind of high performance polymer material which has excellent wear resistance，stain resistance，old resistance and heat resistance properties. | ||||||||
| 關鍵特性Key characteristic | ||||||||
| 1.表面微亮，手感細膩柔軟爽滑A little bright on the surface，exquisite，smooth and soft touch. 2.粘接強度非常高,可粘接材質:ABS、PC 、TPU Very high bonding strength，adhesive materials：ABS、PC、TPU. 3.超耐磨高強度,高回復性,抗變形Excellent wear resistance and deformation resistance，high strength and resilience. 4.成型快、不粘模具Rapid molding，non-stick mold. | ||||||||
| 功能Function | ||||||||
| 產品應用 Main application | 智能腕帶Smart bracelet | 手機保護套Phone protective cover | ||||||
| 儀器外殼Instrument shell | 電子器件粘膠配件Electronic plastic accessories | |||||||
| 加工方法Processing method | 注塑、擠出成型Injection and extrusion molding | |||||||
| 環保認證 Environmental certification | ROHS | REACH | EN71-3 | |||||
| PAHS | ASTM-F963 | Phthalate | ||||||
| 顏色Color | 白色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，24個月Ventilated dry at normal temperature，about 24 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 | 1.23±0.02 | g/cm3 | ASTM D792 | 干燥溫度Drying temp 90 ℃ | ||||
| 硬度Hardness | 87±5 | shoreA | ASTM D2240 | 干燥時間Drying time 3h | ||||
| 拉伸強度Tensile strength | >22 | Mpa | ASTM D412 | 射嘴溫度Nozzle temp 200℃ | ||||
| 斷裂延伸Elongation at break | <500 | % | ASTM D412 | 螺筒一段溫度Screw 1 temp 190℃ | ||||
| 撕裂強度Tearing strength | >90 | Kn/m | ASTM D624 | 螺筒二段溫度Screw 2 temp 180℃ | ||||
| 熔融指數Melt index | >10 | g/10min | ASTM D1238 | 螺筒三段溫度Screw 3 temp 170℃ | ||||
| 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 and backpressure are needed for better colorant dispersion. | |||||||
| 回收 Recycling | 二次料（水口料）回收比率建議最多10%. Consistent regrind usage of up to 10% is permissible. | |||||||
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