不同类型胶粘剂的简易对比

11年6月8日 11:23 | anndi | 1

众所周知，常见胶粘剂一般分为丙烯酸系列、环氧系列、有机硅系列、氰基丙烯酸系列、聚氨酯系列等等。而不同类型的胶粘剂在某些方面都有着各自的特性，例如需要耐温的话一般有机硅会比较有优势，强度要求比较高的话环氧一般会比较有优势，而如果对弹性要求的话有机硅、聚氨酯又会更有优势。现在其实很多体系都是可以相互改性而来弥补原有体系的不足，但这样一般也会需要付出较高的成本。最近公司在和美国赫能合作，从他们的一份资料里面找到了一个简易的对比表，大家可以参考一下。他们这份表主要是针对他们公司的产品，有些方面是比较片面的，例如他里面提到环氧需要双组分混合设备等等，其实早就有单组分热固化的环氧了。还有其它的一些与实际差异比较大的地方，就不一一表述了。请参看下表：

	Adhesive Category
Performance Considerations	Acrylics	Cyanoacrylates	Epoxies	Silicones
Benefits	Good impactresistance/flexbility	Excellent adhesion to rubber or plastics	Wide rangeof formulations	Excellent termperatureresistance
Limitations	Primer required	Low solvent resistance	Mixing required	Low strength
Temperature Resistance Typical for the category	-65°F to 300°F	-65°F to 180°F	-65°F to 180°F	-65°F to 400°F
Highest Temperature Resistance	400°F	250°F	275°F	600°F
Environmental Resistance
Polar Solvents (ex, H20, Ethylene Glycol, IPA, Acetone)	Good	Poor	Very Good	Good
Non-Polar Solvents (ex, Motor Oil, Toluene, Gasoline, ATF)	Very Good	Good	Excellent	Poor
Adhesion to Substrates
Metals	Excellent	Very Good	Excellent	Good
Plastics	Fair	Excellent	Fair	Fair
Glass	Excellent	Poor	Excellent	Very Good
Rubber	Poor	Very Good	Fair	Good
Wood	Good	Good	Very Good	Fair
Overlapping Shear Strength	High	High	High	Low
Peel Strength	Medium	Low	Medium	Medium
Tensile Strength	High	High	High	Low
Elongation/Flexibility	Medium	Low	Low	Very High
Hardness	Semi-Rigid	Rigid	Rigid	Soft
Process Considerations
Number of Components	2	1	2	1
Cure Temperature	Room Temp.	Room Temp.	Room Temp.	Room Temp.
Fixture Time
Average	10 mins	60 secs	35 mins	25 mins
Fastest	30 secs	10 secs	3-5 mins	10 mins
Full Cure Time	24 hours	24 hours	12 – 24 hours	24 hours
Gap Fill
Ideal	0.002″ – .004″	0.001″ – 0.003″	0.004″ – 0.006″	0.004″ – 0.006″
Maximum	0.040″	0.010″	0.125″	0.240″
Dispensing/Mixing Equipment Required	No	No	Yes	No
Light Cure Versions Available?	Yes	Yes	Yes	Yes