American Standard Adhesives (ASA) offers hot melt adhesives for all types of packaging application such as: folding container sealing, corrugated container closure, tray forming, pallet stabilization and container labeling.
In addition to the EVA based type of hot melt glue, we also offer block copolymer based hot melt adhesives (also known as rubber based adhesives), which are mainly used for pressure sensitive applications (PSA). The industries we serve include:
Appliance
Bookbinding
Building Components
Case and Carton Sealing
Container Labeling
Direct Mail Doors and Millwork
Envelope
Flexible Packaging
General Packaging
Textiles
Folding Carton Sealing
Article from: Adhesives & Sealants Industry magazine
October 1, 2008
Hot melts are physically hardening adhesives that are applied in their final chemical state. Only polymers that can be liquefied can be used for this type of adhesive — namely meltable thermoplastics, soluble thermoplastics or elastomers, or polymer dispersions. Although poorly crosslinked elastomers with good swelling properties are, strictly speaking, insoluble, they can still be used in certain cases to produce adhesives if they swell enough for the substrates to be wetted. Physically hardening adhesives generally have good bond flexibility, and are used in a variety of applications.
Hot-melt adhesives are, in general, 100%-solid formulations based on thermoplastic polymers. They are solid at room temperature and activated upon heating above their softening point, at which stage they are liquid and can be processed. After application, they retain the ability to wet the substrate until they solidify. Upon solidification, they return to a physical state that has structural integrity and can function as an adhesive.
Hot melts are applied by extruding, rolling or spraying, and joining is carried out immediately after application or after reheating the solidified layer. The high viscosity of the melt makes them particularly suitable for porous and permeable substrates that otherwise would be more difficult to bond with a solvent system.
