UV Varnish common problems and coping methods-Iota

Products

News

Office Address:	Sunmoon Science Park, 985 Xingzhong Road, High-Tech Zone, Bengbu, China
Factory Address:	Mohekou Industrial Park, Huaishang District, Bengbu, Anhui, China
Contact:	Nathan Zhang
Phone:	0086-552-19805521900
FAX:	0086-552-3822922
Mobile:	19805521900/18119733779
WebSite:	www.siliconeoil.cn www.siliconeoil.net
Email:
QQ:	729118868

Service > UV Varnish common problems and coping methods

UV Varnish common problems and coping methods

UV inks in the printing process prone to problems and solutions are as follows: One problem: shiny good, bright enough. The main reason: UV Varnish viscosity itself too, so that the printed coating is too thin; ethanol, toluene and other non-reactive solvent overdilution; light curing resin gloss itself is not enough; too absorbent paper; anilox roll too thin lead transfer too little light oil; solution: take the necessary measures to be glazing clean prints; properly adjusting the viscosity varnish; varnish deployment type and amount of additives can be added to a small amount of wetting agent; available in 2% wipe the surface of the print alkaline solution. Second problem: the printed surface can not be printed. The main reason: UV Varnish viscosity is small, the coating is too thin; printed surface with oil; ink surface "glass", and Varnish affinity improper; ink containing a release surface material (such as silicone oil, dusting) too much; anilox coating is too thin; solution: take the necessary measures to be glazing clean prints; properly adjusting the viscosity varnish; varnish deployment type and amount of additives can be added to a small amount of wetting agent; available 2 % of an alkali solution to clean the surface of the print. Question three: the printed surface after polishing sticky hair, dry good main reasons: UV power is not enough; UV lamp aging, strength weakened; UV Varnish initiator inappropriate choice; ethanol, toluene and other solvents adding excessive; machine go paper too fast; poor light solid performance UV varnish itself. Solution: timely maintenance equipment and replacement lamp; adding a certain amount of photoinitiators and photosensitizers, such as triamines, etc. in order to accelerate the speed of light solid leather degrees; adjust the printing process. Question 4: uneven surface is coated with stripes and orange peel main reasons: UV Varnish viscosity is too high; the size of the uneven pressure; applying excessive; UV Varnish leveling poor; the paper is not flat, absorbent too; UV varnished surface peace poor. Solution: reduce the viscosity UV Varnish; coating weight reduction, it secretly adjustment in uniform; leveling agent can be added to a small amount; on the printed surface corona treatment, UV varnish to increase the affinity of the surface. Five questions: UV coating pinhole phenomenon main reasons: the coating is too thin; anilox roll too thin; ethanol, toluene, non-reactive diluent is added excessive; printed surface dust Solution: to strengthen the clean operating environment; adding a small amount of leveling host additives, wetting agent; select special UV diluent to prevent incompatible system components; try to increase the coating thickness when printing. Question 6: printed surface of the crater, the main fish-eye phenomenon: the printed surface is not clean, there may be oil; UV Varnish leveling poor; Varnish defoamers inappropriate choice, anti-foaming performance is too strong. Solution: Clean the print surface; rational use of anti-foaming, leveling aids. Question seven: UV Varnish mainly due to poor adhesion: printing ink surface "crystallization" and Varnish unable affinity, wetting; printing inks inappropriate choice of materials; UV Varnish adhesion itself is not enough; light-cured conditions are not reasonable grasp, the curing time is too short or too long; for non-polar or low-polar substrates (such as PE, PP, PET, OPP, BOPP, etc.) untreated direct printing UV Varnish solution: printing ink should be selected lower wax model; choose good flexibility, good adhesion of the light curing resin and reactive monomer; grasp reasonable curing time, the curing time is too short, UV varnished surface curing the underlying cause is not completely cured reduce adhesion; curing time is too long, UV Varnish receive excessive ultraviolet radiation can cause polymerization and after curing, polishing film so brittle, resulting in poor adhesion.

Feedback to "Iota Silicone Oil (Anhui) Co., Ltd."