General Description of 3M Scotch-Weld 6100LV Black
3M Scotch-Weld One-Part Epoxy Adhesive 6100LV Black is an ultra-low-viscosity, single-component flexible epoxy engineered for sealing, wicking, and precision dispensing in consumer electronics assembly. At approximately 1,000 cP (Brookfield), it is purpose-built to wick into hairline gaps, narrow channels, and capillary joints by capillary action — eliminating the need for applied pressure and enabling sealing of complex geometries that higher-viscosity adhesives cannot access.
Its standout feature for electronics manufacturers is validated water resistance: tested to withstand up to 2.5 m of water pressure on polycarbonate substrates using a thin bondline frame around the device perimeter. This makes 6100LV Black a proven solution for water-sealing smartphones, tablets, and wearables. Like all 3M 6100 Series products, it cures at 65°C (≈30 min) or snap-cures at 90°C (≈4 min), with a pot life exceeding 4 weeks. After cure, it remains flexible at 350% elongation — accommodating CTE mismatch between dissimilar materials and absorbing mechanical stress in drop events.
Features & Benefits
- Ultra-low viscosity (≈1,000 cP Brookfield): wicks into gaps and capillary spaces by capillary action; ideal for perimeter sealing without applied pressure
- Validated water resistance up to 2.5 m: tested on PC substrates with 3M water indicator dots — proven solution for smartphone and wearable water-sealing (note: not tested to IPX8 standard)
- Flexible after cure (350% elongation, 2 MPa modulus): minimizes stress on small joints with CTE mismatch between metals, plastics, and glass
- Low-temperature cure at 65°C (≈30 min): protects heat-sensitive electronic components and substrates; snap cure at 90°C in ≈4 minutes
- Long pot life > 4 weeks at room temperature: enables lean inventory, flexible production scheduling, and reduced material waste
- Jettable and dispensable: compatible with precision automated dispensing and jetting equipment for small electronics applications
- Low halogen (IEC 61249-2-21): supports environmental compliance in consumer electronics supply chains
- One-part, no mixing: ready to use directly from syringe; eliminates mixing errors and pot-life management of two-component systems
Typical Applications
- Water resistance sealing of smartphones, tablets, smartwatches, and wearable devices
- Perimeter sealing of electronic device housings
- Wicking adhesive for underfill and gap-filling in small electronic assemblies
- Precision dispensing and jetting in miniaturized electronics
- Bonding of flexible and rigid substrates with CTE mismatch
- Mobile device and wearable electronic device bonding and assembly
属性 | 值 |
成分 | 单组分（1-Part） |
颜色 | 黑色 |
粘度（锥板 @ 5 Hz） | ≈ 1,500 cP |
粘度（布鲁克菲尔德） | ≈ 1,000 cP |
UV荧光示踪 | 否 |
适用期（Pot Life @ 25°C） | > 4周 |
卤素（Cl, Br） | 低卤素，符合 IEC 61249-2-21 |
固化时间 @ 65°C | ≈ 30分钟（DSC测定90%固化） |
固化时间 @ 90°C | ≈ 4分钟（DSC测定90%固化） |
拉伸强度 | 5 MPa（ASTM D638） |
断裂伸长率 | 350%（ASTM D638） |
杨氏模量 | 2 MPa（ASTM D638） |
DMA模量 | 6.5 MPa（1 Hz膜拉伸） |
耐水性 | 通过2.5 m水压测试（PC基材，细胶线框架） |
施工方式 | 点胶（Dispensing）、喷射（Jetting）、毛细渗透（Wicking） |
保质期 | 在-20°C（-4°F）下保存18个月 |
包装规格 | 30 mL注射器 |
