1.As the temperature gradually drops in winter, some customers have experienced poor adhesion, brittle hot melt adhesive, and degumming when using hot melt adhesive for production. What is the reason?

Hot melt adhesive is sensitive to ambient temperature. Due to the cold temperatures in winter, the hot melt adhesive bonding process is cold, resulting in rapid solidification and hardening. Some glue manufacturers will adjust the high-temperature and low-temperature resistance of the glue according to the season when producing glue. Please consult the glue manufacturer when using glue.

2.What is the difference between hot melt glue in winter and summer and autumn?

To be precise, there are some differences in the design of certain properties of glue between winter and summer. For example: the curing time (also called open time) of hot melt adhesive is an important factor affecting the viscosity of hot melt adhesive. Due to factory operations, they are basically carried out at room temperature. The room temperature in winter and summer is very different, so the curing time requirements for hot melt adhesive are different at this time. The same glue needs to shorten its curing time in summer and extend its opening time in winter.

3.What precautions should be taken when using a hot melt adhesive machine in winter?

1. During the bonding process, the hot melt adhesive is heated for too short a time, causing the temperature of the hot melt adhesive to fail to meet the requirements. When using hot melt adhesive in winter, please increase the operating temperature in the hot melt adhesive tank of the hot melt adhesive machine by 10~20°C. Frequently check whether there is any difference between the actual temperature in the glue tank and the table temperature to prevent the temperature control system of the machine from malfunctioning in winter and causing the meter temperature to be inconsistent with the actual temperature.

2. The setting temperature of hot melt adhesive is too low. If the temperature of the bonded material is lower than 15 degrees, it is recommended that qualified customers preheat the bonded material before packaging operation. If necessary, please add auxiliary heating facilities such as hair dryers, heating lamps, etc. to increase the temperature. their temperature to achieve good gluing effect. To ensure the quality of packaging.

3. The storage temperature is above 15℃. The temperature of the warehouse where hot melt adhesive is stored is also best kept above 15 degrees to shorten the melting time of hot melt adhesive.

4. The temperature during work or at the construction site is too low. Please pay attention to the insulation of the production workshop and avoid placing machines that use hot melt glue in places where air circulates quickly, such as doorways, vents, etc.

5. The substrate temperature is too low. Please pay attention to the insulation of the bonded materials. If materials stored in a low-temperature environment are used directly for packaging, the temperature of the glue will drop too quickly, adversely affecting the packaging effect, and in severe cases, the glue may open.