How to use die-cutting materials ?

1. In the selection of die-cutting materials: generally, silicone tape is paired with fluorine release film, while acrylic tape is paired with silicone oil film. Of course, the materials selected for different products may also vary.

2. Release force test using MY-2G, silicone oil film using TESA7475 for release force test

Common problems and precautions

Pay attention to distinguishing between the front and back sides of the single sided release film. As the single sided fluorine release film only has one side for release and the other side is the PET substrate surface, if the release film is used on the wrong side, it will cause the film to stick to the board surface after pressing, making it difficult to tear it off.

There are the following methods for distinguishing the front and back:

1、 Use adhesive paper to stick the release film surface. If it can be adhered, it is the PET substrate surface, and the non adhered surface is the release surface; 2. Mark the front and back of the film to distinguish between the front and back.

2、 The surface static electricity of the release film can easily adhere to dust particles and affect the quality of the board surface if the static electricity of the release film is too high; Similarly, in order to reduce static electricity in the release film, special treatment should be taken for static electricity during coating, winding, and cutting.

3、 The cleanliness of release membranes is currently an important factor that restricts the widespread use of high-quality release membranes in HDI production; Therefore, manufacturers or suppliers of durable release films must operate in clean rooms when coating, winding, and cutting release films. The clean room must reach a level of 10000 to ensure the surface cleanliness of the release film, thereby ensuring the quality of the RCC pressed board.

In addition, attention should also be paid to the temperature of the PET release film pressing plate. The material temperature should be lower than the pressing plate table temperature. The  fluoride release film withstand temperature is about 200 degrees Celsius. If the temperature of the pressing plate exceeds this degree Celsius, the release film will age and crack, which may cause adhesion or contamination of the plate surface. The above precautions can effectively avoid the occurrence of various common problems.