Sleeve swelling is a common phenomena in the flexographic industry. The permanent deformation of the sleeve caused when the ink enters the core of the sleeve is known as sleeve swelling. This results in:
Affected Sleeve tolerance
The permanent deformation caused due to sleeve swelling affects the tolerance of the sleeve. If the sleeve doesn’t have a tight tolerance, it could influence the printing speed and the printing quality.
The physical defect caused by sleeve swelling can influence the pre-press calibrations, causing registration shifts or misalignments.
Poor print quality
Sleeve swelling will cause irregularities in the press. This can cause distortion, skewed reproduced image, overlaps, etc. affecting the print output.
Decreased sleeve lifespan
Sleeve swelling therefore reduces the life of the sleeve.
Additional costs have to be incurred for replacing the sleeves frequently.
Advantage of Tech Sleeves
You can prevent sleeve swelling by sealing the ends of your printing sleeve. At Tech Sleeves, we use Vinyl-ester epoxy resin for sealing the ends. Vinyl-ester epoxy resin has better properties compared to other polyesters:
Vinyl-ester epoxy resin has supreme chemical resistance, which allows Tech Sleeves and Tech Bridges to handle all kinds of solvents and inks used in the flexographic industry.
Physical strength, impact and fatigue resistance
Vinyl-ester epoxy resin has a higher MPA tensile strength, providing better physical strength, impact and fatigue resistance to Tech Sleeves and Tech Bridges.
Thermal shock resistance
The enhanced chemical properties of Vinyl ester enables the printer to use Tech Sleeves and Tech Bridges at higher temperatures and higher speeds of up to 800 m/min, or 2,624 ft/min.