苯乙烯類的TPE,SBS/SEBS之是三嵌段,而且兩端是硬段PS段,就是因為PS段可以相互集結在一起,產(chǎn)生物理交聯(lián)。這個物理交聯(lián)并不是很牢固,達到一定溫度之后硬段會無法保持足夠的凝聚力,就像冰塊融化了一樣。硬段喪失了支撐能力就喪失了硬段的作用了。
SBS/SEBS的硬段PS段軟化點在100℃左右,而在100℃之前PS的凝結力其實已經(jīng)大幅下降了,所以TPE彈性體很少能耐高溫超過100℃,在100℃時候TPE就會變成橡皮泥一樣。很多耐高溫的產(chǎn)品都是用橡膠去做的,橡膠的支撐點不是物理交聯(lián)的PS段,而是化學交聯(lián)。硫化產(chǎn)生的化學交聯(lián)不論是強度,穩(wěn)定性,耐高溫等都比物理交聯(lián)要好.
| 產(chǎn)品說明Product description | ||||||||
| RN50A-CY是一款經(jīng)濟型玩具材料。 RN50A-CY is an economic toy material
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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. | ||||||||
| 功能Function | ||||||||
| 產(chǎn)品應用 Main application | 玩具公仔Toy dolls |
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| 加工方法Processing method | 注塑成型Injection molding | |||||||
| 環(huán)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 | 1.21±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 | >2 | Mpa | ASTM D412 | 射嘴溫度Nozzle temp 190℃ | ||||
| 斷裂延伸Elongation at break | >200 | % | ASTM D412 | 螺筒一段溫度Screw 1 temp 180℃ | ||||
| 撕裂強度Tearing strength | >16 | Kn/m | ASTM D624 | 螺筒二段溫度Screw 2 temp 170℃ | ||||
| 熔融指數(shù)Melt index | >6 | g/10min | ASTM D1238 | 螺筒三段溫度Screw 3 temp 160℃ | ||||
| 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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