Лако-красочные материалы — производство

Peel-and-stick labels provide a quick and easy way to apply labels to almost any surface. Die cut and supplied on release papers, they can be printed in computers for addresses, while preprinted labels for an enormous range of applications, particularly difficult sub­strates such as polyolefins or cold, moist containers make labeling a pleasure compared with […]

The major application area for all pressure-sensitive adhesives is in tapes. Self-stick labels provide a second large area, while a range of miscellaneous applications make up the balance of pressure-sensitive adhesive use. A. Tapes Tapes may be classified according to application areas, such as electrical, packaging, or medical, or in terms of the type of […]

As mentioned earlier, the critical characteristic is the correct tackifier and components ratio. Although no rules exist for tackifier selection, there are certain shortcuts, based on chemical compatibility and melt point. Certain classes of tackifiers work well with specific types of elastomers. For example, aliphatic hydrocarbons generally work better with Solvent based Water based Hot […]

Various dispersions are available which even in unmodified form exhibit aggressive tack and good adhesion, especially to polar substrates. Produced by conventional emulsion polymerization techniques, the tack, peel, and shear properties of these dispersions can be varied within wide limits by the choice of monomers. A dispersion will usually consist of at least two monomers, […]

The three major components are an elastomer, which provides the elastic phase, the tackifier, and the carrier. The earliest pressure-sensitive adhesives used natural rubber tackified with wood rosins, or later, zinc oxide. With the advent of synthetic rubbers and other polymers, formulators have a very much larger range of elastomers at their disposal, including butyl […]

Traditional pressure-sensitive adhesives were solutions of rubber and resin in solvent, and these dominated the market until well after World War II. From that time, as an increasing array of elastomers became available, as the price of solvents soared, and as environmental opposition to the use of solvents increased, water-based and hot-melt types made substantial […]

T. M. Goulding Consultant, Johannesburg, South Africa C. INTRODUCTION Pressure-sensitive or permanent-tack adhesives are, as their name implies, adhesives that remain sticky even when dried or cured. This means that they are capable of bonding to surfaces simply by the application of light pressure. This makes them arguably the most convenient products available today from […]

Base: DER 331 (3) 100.0 Hardener: Capcure 3-800 (12) 90.0 Capcure EH-30 (12) 10.0 100.0 III. SUMMARY Advantages of epoxy resin adhesives may be summerized as follows: 1. Ability to bind a wide range of substrates. 2. Negligible shrinkage during cure, which minimizes stresses. 3. Elimination of galvanic corrosion when bonding dissimilar metals. 4. Solvent-free […]

Parenthetical numbers that follow the components listed in the formulations below corre­spond to these suppliers: 1. Hoechst AG 2. Cray Valley Products 3. Dow Chemicals 4. Anchor Chemicals 5. Degussa 6. Thiokol Corp. 7. Shell Chemicals 8. Union Carbide 9. Sud Chemie AG 10. CIBA GEIGY 11. SKW Trostberg 12. Diamond Henkel A. Water-Based Epoxy […]

Epoxy adhesives are popular for retail or consumer applications. They may be supplied as liquids, pastes, putties, or as one-pack systems in stick form. Considerable ingenuity has been employed in the packaging to ensure that stoichiometric ratios are roughly correct. They are usually available as 5 min systems using mercaptan accelerators or standard setting systems […]