Hot melt adhesive can be used in summer, why does it break in winter?

Hot melt adhesives are important for ambient temperatures, and if you use summer temperatures in the winter, it will become brittle, which is what you call breakage. You increase the current temperature by about 10 degrees, you can try it. If it's a glue stick, I suggest you use a different one that is better.

If there are any questions, you can ask and I can help you solve them.

1. Among the many properties of hot melt adhesives, two properties are very important: high temperature resistance and low temperature resistance!

2. The high temperature in summer will not have any effect on the use of hot melt adhesive, and the relatively low temperature resistance in hot melt adhesive is also 80 degrees, and the high temperature in summer is not enough to affect the bonding effect of hot melt adhesive!

3. The low temperature in winter should be specific to the region, the low temperature resistance of the hot melt adhesive ranges from minus 40 degrees to minus 20 degrees, if the local low temperature exceeds the critical value of the low temperature resistance of the hot melt adhesive used, it is likely to cause the effect of the hot melt adhesive to deteriorate, and it is necessary to replace the lower low-temperature resistant hot melt adhesive at this time!

In the summer, it will soften when the weather is hot, and in the winter, it will be cold, and there are many hot melt adhesives that are not cold resistant, so the situation you said has this effect on some hot melt adhesives.

Or too much filling.

There are many kinds according to the use, it doesn't matter if you use a softer glue stick in winter, you can be hard in summer, generally speaking, the yellow one will be more sticky, and the other ones that are too hard are not suitable for winter, especially in the north.

It takes a long time, and it has to do with the environment.

Special glue for albums (water-based pressure sensitive adhesive).

Pressure-sensitive adhesive is the only kind of transfer glue, and its pressure-sensitive adhesive is roughly divided into three types:

1. Water-based pressure-sensitive adhesive.

2. Oil-based pressure-sensitive adhesive.

3. Hot melt adhesive.

Among them, the second kind of oil-based pressure-sensitive adhesive has been stopped by the state, followed by hot melt adhesive, this kind of collagen is like a solid soap block, which can be used directly after heating, this glue is also called "four seasons glue", that is, it can ensure that the glue is not opened in the four seasons of the year, but in the second year, the product quality is not guaranteed, it will be based on the size of the glue amount at that time, the uniformity and the environment used by the customer in the later stage, the approximate glue opening time will be about one to one and a half years, and the hot melt adhesive is widely used. Basically, it is a print-based industry, such as trademarks, labels, etc., although these products use hot melt adhesive, but basically do not wait for a year to use, so there is no need to worry about the problem of glue.

Then there is the special glue for the album --- water-based pressure-sensitive adhesive. Say it's dedicated because it has a lifetime of not.

Dry, that is, the meaning of lifelong viscosity, this is the characteristics of this glue, after all, a photo album is preserved for life, so the importance of glue is self-evident, this glue is also a special glue for export, because it is only environmentally friendly glue, hot melt glue has a very pungent taste due to the composition of benzene, and water-based pressure-sensitive glue plays a decisive factor in the preservation of albums. Now the album gluing machine and album gluing machine sold on the market all use hot melt adhesive, because hot melt adhesive does not need to have a drying process, and its characteristic is that the glue is directly coated on the base layer of the film (cardboard, PVC, PS, PP, etc.), please pay attention.

There are many reasons why hot melt adhesive does not stick, depending on what factors affect its performance, and temperature is one of the most common reasons at present. As the weather gets colder, the glue often appears to have cured when the material is bonded. Even if it is not cured, the optimal bonding effect is missed.

Even in some northern regions, the temperature of the material is quite low, resulting in unsatisfactory bonding.

Hot melt adhesive is a kind of plastic adhesive, its physical state changes with temperature within a certain temperature range, and the chemical properties remain unchanged, it is non-toxic and tasteless, and is an environmentally friendly chemical product. Because the product itself is solid, it is easy to package, transport, store, solvent-free, non-polluting and non-toxic; As well as the advantages of simple production process, high added value, high adhesive strength and fast speed, it is favored.

In the process of use, you will encounter "glue non-sticking", "wire drawing problem", "temperature too high bubbles", "cold stickiness" and so on. And in these cases, there is often no problem with the product itself. Taking "glue non-stick" as an example, there are many reasons why hot melt adhesive is not sticky, depending on what factors affect its performance, and temperature is one of the most common reasons at present.

As the weather gets colder, the glue often appears to have cured when the material is bonded. Even if it is not cured, the optimal bonding effect is missed. Even in some northern regions, the temperature of the material is quite low, resulting in unsatisfactory bonding.

The following points should be paid attention to when banding edges:

1) Pay attention to the range of substrates applicable to different types of products.

2) It is best to try to seal it with a discarded small board before each start, so that the problem can be found as soon as possible.

3) When the ambient temperature is too low, the edge banding, the plate can not be too cold, too cold will absorb heat and cool down, affect the bonding of the edge banding strip and the hot melt adhesive, ensure that the plate should be coated with hot melt adhesive, and the glue should be appropriately thicker than in summer in winter.

4) When the ambient temperature is too low, you can make a lampshade on the edge banding machine turntable to heat the edge banding strip, so as not to be too cold and lack of corners or overpower.

5) When the ambient temperature is too low, if the edge banding machine has a preheating device, the preheating temperature should be opened to preheat the plate. At the same time, pay attention to the temperature and speed of use.

6) Due to the large difference in temperature between summer and winter, the opening time of hot melt adhesive is different, pay attention to the temperature change.

7) Inventory products should be based on the principle of first-in, first-out use.

1. One of the most important properties of hot melt adhesive is low temperature resistance, and the common hot melt adhesive has low temperature resistance of minus 40 degrees, minus 30 degrees and temperature resistance of minus 20 degrees.

2. Whether the hot-melt adhesive will fall off in the low-temperature environment in winter is whether the low-temperature in winter exceeds the critical value of the low-temperature resistance of the hot-melt adhesive used; If it is exceeded, it is likely to affect the use effect, that is, the situation of degumming.

3. If the low temperature under normal winter conditions does not exceed the critical value, or only occasionally the low temperature exceeds the critical value of the low temperature resistance of the hot melt adhesive used, it has little impact on the bonding effect of the hot melt adhesive, which can be ignored, but if it is so for a long time, it will definitely have an impact!

Generally speaking, there is a range of high and low temperature of hot melt adhesive, in the case of ensuring the quality of hot melt adhesive itself, minus 10 to 20 degrees will not fall off.

1. You can use alcohol to remove the hot melt adhesive, it is best to use anhydrous medical alcohol, instead of industrial alcohol, drop the alcohol on the hot melt adhesive, or use a cotton swab dipped in some alcohol to smear the hot melt adhesive, and the hot melt can be easily removed after hardening. 2. Use wind oil essence to dissolve the hot-melt adhesive repeatedly with jujube. This method is more environmentally friendly, but it is slower.

3. You can take a Xiaoice bag and apply it to the hot melt adhesive, wait quietly for a few minutes, and then detain the old man to shout down. 4. Or put the objects glued with hot melt glue in the refrigerator and freeze them for a while, and when you take them out again, you can easily remove the hot melt adhesive. Hope it helps.