We received feedback from end customers that there was residual glue on the edge of the double-sided tape when it was cut, which made it inconvenient to tear it by hand and reduced the gluing speed of the product. The other party needed us to make improvement suggestions. The following Lanxin company describes the common problems and solutions of die-cut double-sided tape.
In the production of customized tape products and insulating materials , the quality of die-cutting directly affects the subsequent processes of label processing, and even ultimately leads to product defects. Therefore, every link of double-sided tape die-cutting cannot be ignored. In the double-sided tape die-cutting process, common die-cutting quality problems include: continuous die-cutting, die-cutting glue overflow, die-cutting backing paper cutting through, etc. The following introduces how to solve these common problems:
The die cutting products is continuous
First, we check whether the position where the die cutting is continuous is repetitive. If it is repeated regularly, then the problem is definitely related to the die cutting knife tool. In this case, if it is round-to-round die cutting, the die cutting pressure can be increased overall, which may solve the problem of continuous die cutting, but it will also accelerate the wear of the die cutting knife tool. If the problem of continuous die cutting cannot be solved within the range of increasing the allowable pressure, then the only way is to replace a new die cutting knife. If it is flat-to-flat die cutting, the pressure can be adjusted locally.
If the problem of continuous die cutting does not occur regularly and repeatedly, then the problem may be caused by the machine gear accuracy, the running tension of the material, and insufficient die cutting pressure. In this case, we check the running tension of the material and then adjust the die cutting pressure.
The glue overflow in die cutting
The double-sided tape after the die-cutting process. It is a common defect of double-sided adhesive products. Glue overflow can cause problems such as tape appearance defects and poor peeling. We also solve the problem of die-cutting glue overflow from the following aspects:
1. Double-sided tape material performance analysis: Different types of materials have different adhesive types, adhesive processing performance and other characteristics. We first consult with the material supplier about the relevant performance characteristics and select materials suitable for processing technology.
2.Tape processing and storage environment control: Lanxin ’s warehouse has a low-temperature storage area and a constant temperature studio to provide the best protection for low-temperature materials. Die-cutting operations are carried out at a suitable temperature, and the ambient temperature and humidity are controlled. Excessive temperature and humidity will increase the fluidity of the adhesive, which can be clearly felt in actual production. When the production is high in summer , die-cutting glue overflow is more common.
3. Double-sided adhesive die-cutting quality control: Lanxin uses sharp knives to die-cut double-sided adhesive . The knives are made of the most durable metal steel. The blunt-angle blade will squeeze the label adhesive, resulting in glue overflow on the edge of the label during the die-cutting process . The selection of the die-cutting knife is the key.
4. Double-sided adhesive tension control: Excessive rewinding tension will cause excessive squeezing of the double-sided adhesive , which will cause the tape to overflow. Due to the inconsistency of the rewinding tension in the axial direction, it is easy to cause excessive tension in some areas, resulting in local overflow of the label. Small square labels are also prone to double-sided adhesive overflow because they are subjected to greater pressure under the same pressure.
Die-cutting backing paper cutting through
On many products with manual gluing , it is very common for the die-cutting backing paper to be cut through. This is mainly due to the limitation of the accuracy of the customer's die-cutting device and the fact that the gluing method does not require tension on the backing paper. If it is automatic gluing , the die-cutting backing paper will often cause the end user to encounter double-sided tape breakage during automatic gluing . Therefore, we should choose a roller die-cutting method with higher die-cutting accuracy.
The above is the specific solution proposed by Lanxin Company to solve the common problems of customized shaped adhesive products for customers. Lanxin Insulation Materials has more than 25 years of experience in die-cut adhesive products. It provides customers with free samples and tool development. For many years, it has served the following terminal companies, such as LG, HP, Wistron, Asus and other companies in project development.