Select the suitable polyurethane resin for gravure laminationink
To select the suitable polyurethane resin for gravure lamination ink, the following several key factors need to be considered:
Printing substrate: Determine the type of substrate on which the ink will be applied, such as paper, plastic film, etc. Different substrates may require polyurethane resin with specific properties. Adhesion: Ensure that the polyurethane resin can provide good adhesion on the substrate to prevent the ink from peeling off. Solvent resistance: Select the polyurethane resin with sufficient solvent resistance according to the type of solvent the ink comes into contact with. Elasticity and toughness: Consider the bending, folding, or stretching that the printed matter may undergo, and select the resin with appropriate elasticity and toughness. Drying speed: Select the polyurethane resin with a drying speed that meets the requirements according to the production efficiency requirements. Weather resistance: If the printed matter needs to be exposed in the outdoor environment, select the resin with good weather resistance. Chemical stability: Ensure that the polyurethane resin can tolerate the chemicals that may be encountered in the printing process. Viscosity and fluidity: Select the resin with suitable viscosity and fluidity according to the requirements of the printing equipment and process. Compatibility: Be compatible with other ink components and additives to avoid adverse reactions. Cost: Consider cost factors on the premise of meeting performance requirements. Supplier reputation: Select reliable suppliers to ensure product quality and technical support. Technical data and test reports: Refer to the technical data and related test reports provided by the supplier to understand the performance characteristics of the resin. Sample test: Conduct sample tests under actual printing conditions to assess whether the performance of the polyurethane resin meets the requirements.