Increasing Product Quality Through Use of Aerobic Acrylic Adhesives

Aerobic acrylic UV and activator curing technology was developed with a view to main­taining the formulation flexibility necessary to meet a broad range of application require­ments. Adhesives, sealants, and coatings providing improved product quality have been the result. In addition to increased formulation flexibility, improvements in resin charac­teristics possessing toughness and durability have resulted in assemblies of superior quality and performance [5-7].

B. Tough, Durable Bonds Yield Higher-Quality Assemblies

The essence of acceptable assembly quality is to eliminate production line rejects and failures over the life of the manufactured product. Aerobic acrylic activator curing

Adhesive

Values (in.-lb)

Polyamide epoxy

7±5

Cyanoacrylate

2±2

Anaerobic

12±5

2nd-generation acrylic

20±7

General-purpose aerobic acrylic

40±10

(metal deformation)

High-impact aerobic acrylic

60 +

aOn degreased, sandblasted steel, 1/2-in. overlap.

adhesives and sealants have been in use in demanding automotive, medical, electrical, and electronic applications for the past 20 years. Designed to resist vibration, shock, and impact, they have withstood the severe environmental stresses of thermal, as well as physical, shock. Excellent for bonding closely fitting metal, glass, ceramic, filled plastic, and thermoset plastic parts, aerobic adhesives improve durability by also acting as shock­absorbing cushions. High tensile/shear strength to 3000psi, combined with flexibility and the ability to absorb shock, results in a toughness developed to increase the useful life of the bonded or sealed part. Table 2 compares the toughness as measured in impact strength of aerobic acrylics with other adhesive products offered to OEM (original equip­ment manufacturers). Appendix B tabulates a range of properties available from different aerobic adhesive formulations [1].

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