Лако-красочные материалы — производство

Aerobic adhesives have a wider latitude in formulating for specific end-use requirements than other acrylic adhesives [1,2]. Flexibility, opacity, cure speed, and surface compat­ibility may be controlled over a wide range to produce adhesives for metal, glass, many plastics, ceramics, and hard woods. The cured properties of specific aerobic formulations are scarcely affected by efficient thickening agents such as fumed silica. As a consequence, it is possible for an end user to pick a set of cured properties and then have the adhesive’s viscosity modified to specific requirements. The properties of three representative cured formulations are outlined in Appendix B.

Two of many excellent examples of how aerobic acrylic technology improves product quality are the following. A photocopier manufacturer uses an aerobic adhesive to attach large glass lenses to metal frames. The application requires an adhesive that can absorb the forces generated from the large differences in expansion characteristics between glass and metal. Type B formulated adhesives were shown to provide adequate bonds with tensile strength exceeding the deformation strength of the metal frames. However, when subjected to a 300°F temperature range, the glass lenses frequently broke. Increasing the bondline thickness to 10 mils and using a flexible type C formulation produced shock-absorbing bonds, and the lenses now pass the thermal cycle requirements.

An aerobic acrylic adhesive has also been used to increase both product performance and reliability while reducing assembly costs in the manufacture of motorcycle alternators. A major manufacturer of high-performance motorcycles had been holding ceramic

Productivity is increased by making assembly automation processes more efficient.

High-quality parts reduce replacement liability costs. Quality improvements due to toughness, durability, and structural strength of bondpottings and sealants and protective coatings lower liability exposure.

Aerobic adhesives cure to form bonds with structural strength; produce highly adhesive practical coatings, sealants, and pottings at the speed required by an efficient assembly process

Aerobic acrylics improve productivity. They facilitate automation by curing ‘‘instantly,’’ but only on demand.

Profitability can be increased by lowering per unit labor content.

Low-volatile, 100% solids means minimal EPA and OSHA impact.

EPA, Environmental Protection Agency; OSHA, Occupational Safety and Health Administration.

magnets in place with a plastic retaining ring. The manufacturer had to increase the alternator’s output from 17 to 22.5 amps to 3600 rpm without increasing the size of the alternator. It was known that replacing the retaining ring with a bonding process would permit more magnet mass in the same space.