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Determine whether the material used to make the box is the same as before, and whether the surface has been treated, such as copperplate paper, with completely different properties from the original one. The performance differences of hot melt adhesives for the same purpose in the market are not significant. It will be difficult to find suitable hot melt adhesive for cardboard boxes, and passive selection may increase production costs. If the bonding effect of the cardboard packaging is really poor, it is recommended to adjust the surface treatment process of the cardboard box.
Secondly, whether the temperature has changed significantly from the previous time, the external temperature will affect the curing speed of the hot melt adhesive. When the weather is cold, the curing speed will be shortened, and if the line speed cannot keep up, it will not stick firmly. There are several solutions:
Firstly, it is to improve the speed of the production line, so that the glue can complete the sealing operation with better adhesive performance; Secondly, increase the usage temperature of hot melt adhesive by 5-10 degrees Celsius to prolong the cooling time; 3. Replace the hot melt adhesive with one that dries less quickly in cold weather.Moreover, whether the quality of the cardboard box hot melt adhesive is consistent with before and how much the quality of the raw materials fluctuates have an impact on the quality of the hot melt adhesive products. If the manufacturer does not control it well, it will have a significant impact on performance. This is a matter of choosing a long-term cooperative hot melt adhesive supplier. It is important to choose a Sunlife hot melt adhesive manufacturer with research and development capabilities, rather than relying on a formula to constantly adjust the composition ratio. What happens in the application can fundamentally solve the problem.
The common problem is that the film cover cannot stick to the book cover After the surface of the hardcover book cover (waist cover/outer cover) is coated with film, the surface energy of the film layer is extremely low,hot melt adhesive pelletsDifficult to wet and penetrate, resulting in weak adhesion between the protective cover and […]
It is crucial to choose the appropriatehot melt adhesivefor each application. The adhesive required to complete a specific task may vary greatly, so it is important to understand which adhesive is most suitable for your application. The five commonly used types of main polymer substrates are the main components of our paper boxes and box […]
Direct answer: The impact is significant. For every 10 ℃ decrease in workshop temperature,hot melt adhesiveThe actual opening time has been reduced by about 30-40%; When the relative humidity exceeds 75%, the moisture content of the paper increases, and the wetting and penetration of the adhesive will deteriorate. The performance of the same batch of […]
The core of Guangzhou flatbed hot melt adhesive isMoisture and heat resistance, good leveling, strong initial adhesion, and adaptable opening timePriority selectionModified EVA (mass production) or PUR (high-end)Accurately match according to the substrate, equipment, and season, avoiding “soft in summer and brittle in winter, opening glue in the south”. 1、 Guangzhou climate pain points (key […]
