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不同类型胶粘剂的简易对比

作者:anndi  发表于:2011年06月08日 23:23  分类:专业知识  11,572 views 

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

 

 

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