Лако-красочные материалы — производство

The concept of cross-linking polymers with UV light attained full commercial acceptance in the coatings and ink industries in the late 1970s, extending UV technology to joining smooth, nonporous substrates. These initial efforts proved disappointing as resins tended to give low-strength bonds to surfaces that were difficult to adhere to, including metals and other nonporous […]

Figure 5 shows two ferrite magnets being held on a typical fixture prior to DC motor assembly. A special viscosity grade of rapid curing, moderate tensile, high-durability adhesive acrylic is depicted on the vertically held magnets. An easily dispensable viscosity was combined with a nondripping rheology as part of the customizing process for the manufacturer. […]

On hundred percent solids, solvent-free-aerobic acrylic adhesives are often customized to the needs of the assembly and the process. They produce permanent, structural strength bonded assemblies, pottings, and (electronic) coatings within seconds. Productivity is increased; assembly automation processes are made more efficient because the curing technology can be customized to fit the requirements of the […]

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 […]

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 […]

1. Chemical Cure Chemical bonding techniques for all acrylic adhesives are similar. First, the activator is applied to one of the surfaces to be joined as a thin film. While the permissible ‘‘ratio’’ of activator to adhesive is quite wide (10:1 to 50:1), too much activator will lower bond strengths. Activators are available in solvents […]

A. Aerobic Acrylic Curing Technology-Activator and Heat Cures Chemical or heat curing structural strength aerobic adhesives technology was first intro­duced to the assembly industry in the early 1980s [1,2]. High-performance characteristics derived from combining urethane oligomers with (meth)acrylic monomers and “elasto­meric domain’’ compounds. The meaning of the term ‘‘aerobic’’ and how it is different from […]

Andrew G. Bachmann Dymax Corporation, Torrington, Connecticut, U. S.A. I. INTRODUCTION It is axiomatic that manufacturing productivity is increased and per unit cost is decreased by making assembly and automation processes more efficient. High-quality parts further lower costs by reducing rework and replacement liability costs. Environmental conscious­ness and regulatory compliance have become a permanent and […]

Testing standards and performance specifications for anaerobic adhesives and sealants have been established by government agencies and industrial organizations in several countries. In the United States there are military specifications for thread lockers, sealants, and retaining compounds. Mil-S-22473E, 12 April 1983, ‘‘Sealing, Locking and Retaining Compounds: (Single Component)’’ covers 15 of the earliest ‘‘letter grade’’ […]