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垫片
瓦克的硅橡胶具备优异的密封性和粘接特性，耐介质，耐高温，寿命长久，能够保障功能安全，为乘员提供有效保护。特别在用于发动机舱时，瓦克的硅橡胶产品即便在高温、持续振动和与介质接触的恶劣条件下，亦可确保密封性能可靠。此外，有机硅是多层结构的高强抗耐纤维垫片不可或缺的组成部分。
优势：
- 热稳定性高
- 耐介质性优异
应用：
- 气缸垫片
- 基材浸渍（含硫或不含硫）
- 对密封件轮廓进行丝网印制
- 表层密封面涂
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说明
[1] 动态粘度 | 25 °C | WSTM-2103, [2] Shore density A | WSTM-1110, [] 适合, [] 非常适合, [] 极其适合
[1] 动态粘度 | 25 °C | WSTM-2103, [2] Shore density A | WSTM-1110, [] 适合, [] 非常适合, [] 极其适合
优势：
- 耐燃油、机油及化学品
- 渗油
- 阻燃
- 在大跨度的温度范围内（-90°C至+300°C）具有耐热性
应用：
- 成型密封件
- 发动机密封垫
- 油底壳密封垫
- 冷却系统密封件
- 多芯电子连接器用密封垫，单线及径向密封件
优势：
- 工艺灵活性强
- 加工简便
- 经济效益高
- 可无损拆卸
- 可对部件进行集成密封
应用：
- 散热器密封
- 水泵、油泵密封
- 壳体密封
- 隔音与保温
- 抗震与抗振
Product Recommendations
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Products
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Technical data
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Product properties
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| Viscosity, dynamic | Tear strength | Hardness Shore A | Tensile strength | Elongation at break | Hardness Shore 00 | Resistance | Product Rheology | Crosslinking Property | Vulcanizate | ||
| ELASTOSIL® E4 | - - | 7.3 N/mm[1] 7.3 N/mm[1] | 15[2] 15[2] | 2 N/mm²[4] 2 N/mm²[4] | 750 %[7] 750 %[7] | - - | - | Non-slump | - | - | |
| ELASTOSIL® RT 624 "4S" A/B VS | 60000 mPa·s[10] 60000 mPa·s[10] | - - | - - | - - | - - | - - | - | - | - | - | |
| ELASTOSIL® RT 713 | - - | - - | - - | - - | - - | - - | - | Non-slump | Fast curing under heat, One-component, Addition Curing | Foam, Compressible | |
| ELASTOSIL® RT 723 A/B | 600000 mPa·s[11] 600000 mPa·s[11] | 13.8 N/mm[1] 13.8 N/mm[1] | - - | 5.9 N/mm²[5] 5.9 N/mm²[5] | 500 %[8] 500 %[8] | - - | Media resistant, Heat resistant, UV stable | - | Fast curing under heat, Two-component, Addition Curing | - | |
| ELASTOSIL® RT 773 | - - | 4.7 N/mm[1] 4.7 N/mm[1] | 35[2] 35[2] | 1.2 N/mm²[5] 1.2 N/mm²[5] | 75 %[8] 75 %[8] | - - | Media resistant | Shear thinning, Thixotropic, Non-slump | Condensation-curing, Two-component | Self-adhesive, Compressible, Low density, Electrically insulating | |
| ELASTOSIL® SC 870 A/B | 40000 mPa·s[12] 40000 mPa·s[12] | - - | 8 - 12[3] 8 - 12[3] | 350 kPa[6] 350 kPa[6] | 100 %[9] 100 %[9] | 40 - 60[13] 40 - 60[13] | Heat resistant | Thixotropic | Two-component, Addition Curing | Foam, Compressible | |
Legend
[1] Tear strength | ASTM D 624 B, [2] Hardness Shore A | DIN ISO 48-4, [3] Hardness Shore A | DIN ISO 48-4 | (with skin), [4] Tensile strength | ISO 37 type 1 | Type 3 / 23°C / 2mm, [5] Tensile strength | ISO 37 type 1, [6] Tensile strength | ISO 1798, [7] Elongation at break | ISO 37 type 1 | Type 3 / 23°C / 2mm, [8] Elongation at break | ISO 37 type 1, [9] Elongation at break | ISO 1798, [10] Viscosity, dynamic D = 0.5 1/s | 25 °C | DIN EN ISO 3219, [11] Viscosity, dynamic | 25 °C | 0.5 1/s | DIN EN ISO 3219, [12] Viscosity, dynamic | 23 °C | Brookfield | Spindle 5, 2.5UPM, [13] Hardness Shore 00 (with skin) | ASTM D 2240, [] Suited, [] Well suited, [] Ideally suited
[1] Tear strength | ASTM D 624 B, [2] Hardness Shore A | DIN ISO 48-4, [3] Hardness Shore A | DIN ISO 48-4 | (with skin), [4] Tensile strength | ISO 37 type 1 | Type 3 / 23°C / 2mm, [5] Tensile strength | ISO 37 type 1, [6] Tensile strength | ISO 1798, [7] Elongation at break | ISO 37 type 1 | Type 3 / 23°C / 2mm, [8] Elongation at break | ISO 37 type 1, [9] Elongation at break | ISO 1798, [10] Viscosity, dynamic D = 0.5 1/s | 25 °C | DIN EN ISO 3219, [11] Viscosity, dynamic | 25 °C | 0.5 1/s | DIN EN ISO 3219, [12] Viscosity, dynamic | 23 °C | Brookfield | Spindle 5, 2.5UPM, [13] Hardness Shore 00 (with skin) | ASTM D 2240, [] Suited, [] Well suited, [] Ideally suited
与置入式密封件相比，就地成型垫片的优势在于，需要粘接的组件之间的配合精度无需完美，密封件无需额外固定也不会错位。因此，用该工艺制成的部件允许较大公差，开发成本也更低。
优势：
- 高效粘接
- 接合可靠性强
- 应力分布均匀，松弛特性优异
- 用途广泛
- 经济效益高
应用：
- 油底壳密封垫
- 传动密封
- 前照灯粘接
- 防潮、防风化外壳粘接
