倍韌/BESTPERNE® TSV70N
熱塑性彈性體Thermoplastic Elastomer
| 產品說明Product description | |||||||
| ·TSV70N是一款新型的高分子復合材料，韌性和強度平衡，耐磨，抗污，絲滑細膩，超耐黃變，耐化學性，導熱性符合穿戴產品的要求.TSV70N is a new kind of polymer material which has excellent wear resistance，stain resistance ，yellowing resistance，chemical resistance ，smooth and exquisite touch，high thermal conductivity，toughness and strength of the balance.It is very suitable for wearable products. | |||||||
| 關鍵特性Key characteristic | |||||||
| 1.舒適的觸感，柔韌細膩、爽滑Comfortable feel，flexible ，exquisite and smooth touch. 2.粘接強度高，可粘接材質ABS、PC、TPU Very high bonding strength，adhesive materials：ABS、PC、TPU. 3.實用性，耐臟、耐油、耐汗、耐變色It is very practical，for excellent stain resistance，oil resistance，sweat resistance ａnd discoloration resistance. 4.具有的耐黃變性能Excellent yellowing resistance performance. 5.可靠的安全性，無毒、過敏性Reliable security ，non-toxic，non-allergic. | |||||||
| 功能Function | |||||||
| 產品應用 Main application | 蘋果手表帶Apple watchbands | 高檔手機護套High-end phone protective covers | |||||
| 醫療器材Medical device | 智能手環Smart Bracelet | ||||||
| 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 | 本色Natural | ||||||
| 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 | 1.08±0.02 | g/cm3 | ASTM D792 | 干燥溫度Drying temp 90℃ | |||
| 硬度Hardness | 70±5 | shoreA | ASTM D2240 | 干燥時間Drying time 3Hours | |||
| 拉伸強度Tensile strength | >7 | Mpa | ASTM D412 | 射嘴溫度Nozzle temp 190℃ | |||
| 斷裂延伸Elongation at break | <750 | % | ASTM D412 | 螺筒一段溫度Screw 1 temp 200℃ | |||
| 撕裂強度Tearing strength | >35 | Kn/m | ASTM D624 | 螺筒二段溫度Screw 2 temp 190℃ | |||
| 熔融指數Melt index | >1 | g/10min | ASTM D1238 | 螺筒三段溫度Screw 3 temp 180℃ | |||
壓力
注塑過程是壓力包括塑化壓力（背壓）和注射壓力。螺桿后退時，其頂部熔料所受到的壓力即為背壓，通過溢流閥來調節。增加背壓會提高熔體溫度，減低塑化速度，使熔體溫度均勻，色料混合均勻，并排出熔體氣體，但會延長成型周期。TPU的背壓通常在0。3～4MPa。
注射壓力是螺桿頂部對TPU所施的壓力，它的作用是克服TPU從料筒流向型腔的流動阻力，給熔料充模的速率，并對熔料壓實。TPU流動阻力和充模速率與熔料粘度密切相關，而熔料粘度又與TPU硬度和熔料溫度直接相關，即熔料粘度不僅決定于溫度和壓力，還決定于TPU硬度和形變速率。剪切速率越高粘度越低；剪切速率不變，TPU硬度越高粘度越大。
在剪切速率不變的條件下，粘度隨溫度增加而下降，但在高剪切速率下，粘度受溫度的影響不像低剪切速率那樣大。TPU的注射壓力一般為20~110MPa。保壓壓力大約為注射壓力的一半，背壓應在1。4MPa以下，以使TPU塑化均勻。
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