There are several factors to consider in choosing the right web adhesive.
Selecting the correct base polymer ?The base polymers –polyester, polyamide, and polyurethane- or blended alloys used of web adhesives offer unique benefits for performance, handling time, and manufacturing throughput. ?Bond performance is impacted by the base chemistry of the web.
Consider the melting temperatures or softening point ?Typical activation temperatures range from 170?F to 330?F. ?Thermoplastic adhesives cannot be subjected to applications where elevated temperatures might reactivate the adhesive. ?The base polymer chemistry impacts the softening and melting temperatures, which affect processing conditions.
Consider viscosity, solvent and water resistance ?Viscosity can affect bond performance of some multi-layer, specialty laminates. ?Water and solvent resistance will vary, depending on the base chemistry of the web.
Choosing the right basis weight ?The adhesive pattern and permeability vary depending on the web manufacturing process. ?Uniformity will influence bond consistency and certain performance- related ratios, such as bond strength-to-porosity. ?Higher basis weight web adhesives reduce the permeability of the bond. ?Lower basis weight web adhesives could result in bond failure. ?Determining the ideal basis weight requires consideration of the substrates being bonded, base chemistry of the web, as well as the activation temperature and other processing requirements.
Fire retardancy ?Jinghua offers fire retardant (FR) web adhesives for applications where fire retardancy is a performance requirement. ?Fire retardant web adhesives are available in a variety of basis weights and chemistries to achieve the best bond performance.
