Suzhou Oushida Hot Melt Machinery Equipment Co., Ltd.

The influence of hot melt adhesive opening time on construction process

Company Profile

Suzhou Oshida Hot Melt Adhesive Machinery Equipment Co., Ltd. is a high-tech enterprise specializing in the research and development, production, sales and technical consulting of hot melt adhesive intelligent spraying equipment.

Customers often ask, what is the open time of hot melt adhesive? What is the impact on construction and bonding effect? ​​Let me talk about its importance. Open time, in English, is the time interval from the application of adhesive to the time when the hot melt adhesive loses its ability to wet the bonded object due to solidification or curing; in layman's terms, it is the time between the hot melt adhesive being applied to one adherend and the time it takes to bond to another adherend, which means that the two adherends must be bonded within the specified time to ensure the bonding strength.

Usually the open time is measured in seconds. The length of the open time varies with the type of adhesive. Different uses have different requirements for the open time. For example, handicrafts generally require manual operation and adjustment, so the corresponding open time should be longer to facilitate operation and adjustment; but if automated equipment, assembly line production, and high-speed bonding are used, the corresponding hot melt adhesive should have a shorter open time.

The open time of hot melt adhesive and the coordination of construction process have a significant impact on the final bonding effect of hot melt adhesive. So what factors affect the open time of hot melt adhesive?

1. During the production process of hot melt adhesive, hot melt adhesive manufacturers can control the open time by adjusting the formula of hot melt adhesive.

2. During the hot melt adhesive application process, slightly increasing the melt temperature of the equipment can extend the open time. (The specific temperature range needs to be consulted with the hot melt adhesive manufacturer, and the maximum temperature cannot exceed the application temperature of the hot melt adhesive, otherwise it will cause adhesive damage)

3. The larger the amount of glue, the slower the cooling, and the longer the open time.

4. The lower the ambient and material temperature, the faster the hot melt adhesive cools, and the shorter the open time.

Knowing these factors can control the open time of the hot melt adhesive to a large extent, thereby achieving the best bonding effect.

Overview of Oushida hot melt adhesive intelligent spraying equipment: