3M 4929
描述信息
胶粘剂描述:
3M VHB胶带采用高性能粘接剂，具有优良的长期保温性能VHB家族中胶带的剥离粘附力和抗拉强度明显高于典型的压敏胶带胶带采用高性能粘接剂，具有良好的长期保存能力VHB家族中胶带的剥离粘附力和抗拉强度明显高于典型的压敏胶带
产品描述:
VHB磁带是理想的在许多内部和外部工业应用在许多情况下，它们可以取代铆钉、点焊、液体胶粘剂和其他永久紧固件
VHB磁带家族中的每一盘磁带都有特定的特征这些可以包括高拉伸、剪切和剥离附着力、耐溶剂、水分和增塑剂的迁移、ul识别、低放气、膜衬、构象和胶粘剂等，可在低温下应用，低 至32 F (0 C)
VHB磁带是理想的连接各种基材，包括大多数金属，密封的木材和玻璃，以及许多塑料，复合材料和油漆表面
注:所有VHB胶带应在实际使用条件下，由用户对其进行彻底的评估，以确定某一特定的VHB胶带是否适合某一特定用途，并适用于用户的应用方法，特别是在预期使用涉及极端环境条件的情况下
产品应用
- VHB Joining Systems are suited for use in many interior and exterior industrial applications. In many situations, they can replace rivets, spot welds,liquid adhesives, and other permanent fasteners. Each product in the VHB family has specific strengths.These can include high tensile, shear and peel adhesion and resistance to solvents, moisture and plasticiser migration. All VHB fasteners should be thoroughly evaluated by the user under actual use conditions with intended substrates, especially if expected use involved extreme environmental conditions.
- VHB Joining Systems are suitable for bonding a variety of substrates, including sealed wood,many plastics, composites and metals. Plastics which can be a problem are polyethylene, polypropylene,teflon, silicones and other low surface energy materials.
- Plasticised vinyl bonding is dependent upon the types and concentrations of plasticisers which can migrate into the adhesives causing a reduction in bond strength
- 4945 is most resistant to plasticiser migration. (see VHB Special Feature products data sheet).
- Galvanised surfaces are potential problems and should be carefully evaluated.
- To prevent corrosion on copper and brass, only lacquer coated material should be used with VHB Joining Systems.
- Thorough evaluations are recommended when bonding is required to any questionable surface.
技术性能
颜色Color
black
胶带离型层外观Tape Liner appearance
Clear
胶带离型层Tape Liner Material
Polyester
压敏胶带体系Pressure-sensitive tape system
Acrylic
胶带基材Tape Carrier Type
Acrylic foam Closed Cell
材料厚度(不含离型层)Thickness(without Liner)
0.64 mm
密度/比重Density/specific gravity
800 kg/m^3
热膨胀系数/率CTE:Coefficient of thermal expansion
1.80E-04 mm/mm/℃
泊松比Poisson ratio
0.5
条件Conduction
长期高温
工作温度Operating/Working Temperature
200 ℉ ℉
层类型Layer Type
Adhesion
层描述Layer description
Acrylic
基材substrate
alum
测试温度temperature
23 ℃ ℃
正拉力Tensile
160 lbf/in^2(PSI) lbf/in^2(PSI)
粘接面积Test area
1 in^2 in^2
测试速度test speed
50 mm/min mm/min
基材substrate
不锈钢
剪切力shear
100 lbf/in^2(PSI) lbf/in^2(PSI)
粘接面积test area
1 in^2 in^2
测试温度temperature
23 ℃ ℃
测试速度test speed
12 in/min in/min
存储条件Storage
21C,50%RH
有效期Shelf life
24 Month Month
基材substrate
sus
剥离力Tape 90°Peel Adhesion
20 lbf/in lbf/in
测试温度Test temperature
23 ℃ ℃
测试速度test speed
305 mm/min mm/min
负重weight
1500 g g
基材substrate
sus
保持时间Hold time
10000 min min
保持温度Hold temperature
22 ℃ ℃
粘接面积area
0.5 in^2 in^2
项目Item
Solvent Resistance
结果Result
No apparent degradation
项目Item
UV resistance
结果Result
This family of tapes has shown excellent U.V . resistance in outdoor weathering tests and weather-o-meters tests
结果Result
Excellent
项目Item
Moisture Resistance
强度类型Strength Item
弹性/杨氏模量值(E)
强度值/模量值Strength Value
5E+3 kPa kPa