One. Composition and characteristics
The protective film glue is an emulsion pressure sensitive adhesive which is obtained by emulsion polymerization of an acrylate monomer. Compared with solvent-based glue, it is safe to use and has no fire hazard. When coating, it is easy to clean, and the solvent-free exhaust gas is discharged without adversely affecting the environment. Water is used as the dispersion medium and this glue is less expensive to use.
Since the protective film glue is pure C type, it has the characteristics of high transparency and good aging resistance. Add special curing agent to adjust the peeling force and cohesion of the glue. Thereby, the temperature resistance and water resistance of the protective film are improved.
Two. Application range
It is applied to PE surface protective film, blue film, milk white film and etc. These films are suitable for protecting stainless steel plate, aluminum plastic plate, cabinet plate, electrophoretic aluminum profile, PVC plastic steel profile and etc.
It is also applied to BOPP, PET aluminized film surface protection film, etc. These films are suitable for protecting PVC plastic steel profiles, and etc.
Three. Physical properties
Glue preparation: Pour the protective film glue into a container and stir while adding the right amount of water and curing agent. Continue to stir for 10 to 15 minutes after finishing adding water and curing agent.
*Pure water should be reverse osmosis water, distilled water or ion exchange water. Do not add tap water or deep well water or mineral water.
*The amount of curing agent depends on the viscosity and cohesion. The specific amount depends on the coating machine and the surface to be protected.
Coating: coating can be applied by indirect coating of anilox roller or direct coating by anilox roller, or by wire roller coating or wire scraping, depending on the amount of coating.
If snow-like shrinkage occurs during coating, it is necessary to increase the surface tension of the substrate (such as PE) or reduce the surface tension of the glue.
The degree of drying of the protective film should be ensured to ensure that the moisture content in the adhesive layer is extremely low, otherwise the degree of curing is affected.
In principle, the prepared glue should be used up within 4 hours. But in actual use, in order to ensure the uniformity of the product, it is recommended that the amount of prepared glue is limited for 1 hour use.
If the leftover glue has been stored for a long time, we can add the curing agent and gradually mix it into the new glue. Do not use it directly.
Stripes appearing in wire roll coating or wire scraper coating can be eliminated with special equipment.
Five. matters needing attention
Six. Storage, packaging and transportation