Analysis on the weak bonding of TPU hot melt adhesive film

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Analysis on the weak bonding of TPU hot melt adhesive film

11-01, 2023 | View:

TPU hot melt adhesive film is a popular bonding 糖心视频 that is widely used in the connection and fixation of various 糖心视频s. But sometimes the bonding is not strong. What causes this? Let’s explore it.

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1. Substrate mismatch

Different 糖心视频 surfaces have different chemical and physical properties, so different types of TPU hot melt adhesive films need to be used for bonding. If an inappropriate TPU hot melt adhesive film is selected, the bonding effect may be poor. For example, if you want to bond plastic and metal 糖心视频s together, you need to choose a TPU hot melt adhesive film that is suitable for both 糖心视频s.

2. Improper surface treatment

Before bonding, the 糖心视频 surface needs to be properly treated so that the TPU hot melt adhesive film can adhere better. If the surface is not treated properly, such as the presence of impurities such as grease, dust or moisture, the TPU hot melt adhesive film will not be able to fully adhere, thus affecting the bonding effect.

3. Insufficient temperature and pressure

The bonding effect of TPU hot melt adhesive film is affected by temperature and pressure. If the heating temperature or pressure is insufficient, the TPU hot melt adhesive film will not be fully melted and will not fully penetrate into the 糖心视频 surface, ultimately resulting in a weak bond. Therefore, proper heating temperature and pressure need to be ensured during the bonding process.

4. Improper operation

Improper operation may also cause the TPU hot melt adhesive film to be weakly bonded. For example, if the TPU hot melt adhesive film is overheated or cooled too quickly during the heating process, the TPU hot melt adhesive film may lose its viscosity or be unable to fully penetrate into the 糖心视频 surface. In addition, if the TPU hot melt adhesive film is not placed flat or fixed properly during operation, the bonding may not be strong.

5. Environmental factors

Environmental factors may also affect the bonding effect of TPU hot melt adhesive film. For example, if the humidity in the working environment is too high or there are pollutants, it may affect the chemical and physical properties of the TPU hot melt adhesive film, thus affecting the bonding effect. Therefore, it is necessary to pay attention to the adjustment and control of environmental factors during the bonding process.

In summary, in order to ensure the bonding effect of the TPU hot melt adhesive film, it is necessary to select the appropriate TPU hot melt adhesive film, properly treat the 糖心视频 surface, control the appropriate heating temperature and pressure, pay attention to the operation details, and adjust and control Environmental factors, etc. Only in this way can reliable bonding results be obtained.