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Hot melt pellets for UV varnish boxes: Why is it more reliable than traditional glue?
Classification： Company News
Classification： Industry Information
2025-04-14
In the paper packaging industry, the sealing efficiency and reliability of UV glossy oil boxes directly affect product transportation safety and brand image. Traditional adhesives often face problems such as slow drying, insufficient viscosity or long-term degumming, and hot melt pellets designed for UV varnish boxes are becoming the new darling of the industry with their fast drying, ultra-high viscosity and high cohesion characteristics. This paper will analyze its core advantages and application value from the technical point of view.
First, quick drying performance: the key to efficient production
The traditional hot melt adhesive needs a long time to cool and cure, and the hot melt pellet used for the sealing of the UV glossy oil box adopts a special formula, which can cure quickly in a short time and greatly shorten the production cycle. Melt into liquid after heating in hot melt glue machine, quickly penetrate the paper fiber, and quickly form a preliminary adhesive layer, especially suitable for high-speed automatic sealing production line. For example, in e-commerce logistics centers, where hundreds of cartons are sealed per minute, quick-drying pellets can avoid carton deformation or bonding surface offset caused by the glue not drying, significantly improving efficiency.
Second, the viscosity is particularly strong: adapt to the protection of complex conditions
Due to the coating or oil layer treatment of the surface of the UV glossy oil box, higher requirements are put forward for the bonding force of the adhesive. Through molecular surface penetration technology, this hot melt pellet can be tightly bonded with the glossy coating and paper substrate to achieve the bond strength of the paper fiber that is torn and destroyed. Test data show that its stickiness is 40% higher than that of traditional glue, even in humid environments or high-frequency vibration (such as long-distance transportation), it can still maintain the structural integrity of the carton and avoid the risk of damage caused by sealing box cracking.
Third, high cohesion: tear resistance and long-term stability
Cohesion is the ability of the colloid itself to resist stretching, which directly affects the durability of the sealing box. The rubber particles have cohesion strength, even if the tape withstand external pull, the rubber layer is not easy to break or stratify. For example, in heavy machinery packaging, the UV gloss box needs to withstand the inertial impact of the internal parts, and the high cohesion pellets ensure the long-term stability of the sealing structure and reduce after-sales problems caused by the failure of the adhesive layer.
Fourth, the suitability of paper bonding advantages
Wide compatibility: Suitable for different grams of paper (such as corrugated paper, cardboard) and UV varnish surface, no need to change the glue frequently.
Environmental protection and pollution-free: no volatile organic compounds (VOCs), in line with packaging industry environmental standards, especially suitable for food, drugs and other sensitive areas.
Easy operation: Excellent thermal and cold stability, suitable for manual and automatic sealing equipment, reduce process debugging costs.
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