The lamination process is simple and inexpensive, but because the coated paper is difficult to recycle, it is non-degradable and can easily cause white pollution. Long-term use will also endanger the health of workers. Therefore, the traditional instant coating type adhesive material will be replaced by a high quality, environmentally friendly new type of adhesive. Coating not only enhances the surface brightness and protects printed graphics, but also does not affect the recycling and reuse of paper, saving resources and protecting the environment. Therefore, it is widely used in the surface processing of paper packaging printing products. The glazing coatings mainly include solvent coatings, waterborne coatings, and UV coatings. Due to the poor efficacy of solvent varnish and its unfavorable environmental protection, the application range is greatly limited.
Waterborne varnish uses water as solvent, non-toxic and odorless, eliminating the harm to the human body and the pollution to the environment. It has the advantages of fast drying speed, stable performance, good abrasion resistance on the light surface, wide applicability after printing, and heat Sealing performance, use of safe and reliable, and other characteristics, more and more food, medicine, tobacco carton packaging and printing companies pay attention.
UV coating depends on the irradiation of ultraviolet light to make chemical reaction inside the UV coating to complete the curing process. Due to the effect of ultraviolet rays, UV light is instantaneously dried when it is glazing, and there is no volatilization of the solvent during curing, which will not cause environmental pollution. Printed products using UV varnish have high surface gloss, heat resistance, abrasion resistance, water resistance, and light resistance. However, due to the high price of UV varnish, high requirements are imposed on machine performance. Therefore, they are currently used only on high-grade paper boxes. Light.
Waterborne varnish uses water as solvent, non-toxic and odorless, eliminating the harm to the human body and the pollution to the environment. It has the advantages of fast drying speed, stable performance, good abrasion resistance on the light surface, wide applicability after printing, and heat Sealing performance, use of safe and reliable, and other characteristics, more and more food, medicine, tobacco carton packaging and printing companies pay attention.
UV coating depends on the irradiation of ultraviolet light to make chemical reaction inside the UV coating to complete the curing process. Due to the effect of ultraviolet rays, UV light is instantaneously dried when it is glazing, and there is no volatilization of the solvent during curing, which will not cause environmental pollution. Printed products using UV varnish have high surface gloss, heat resistance, abrasion resistance, water resistance, and light resistance. However, due to the high price of UV varnish, high requirements are imposed on machine performance. Therefore, they are currently used only on high-grade paper boxes. Light.
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