What are the precautions for the die-cutting process of PET thermosensitive silver paper?

The die-cutting process of PET thermosensitive silver paper needs to pay attention to the following matters:

1、 Consideration of material properties

The toughness of PET material: PET material has strong toughness. When using ordinary die-cutting knives for die-cutting, due to insufficient blade strength and short service life of the die-cutting knife, it may result in partial inability to cut the adhesive label. Therefore, when choosing a die-cutting knife, it is recommended to choose a blade that has undergone hardness treatment, with a hardness of at least 58 Rockwell hardness and a blade angle of 37 °~75 °. The smaller the angle, the sharper the blade and the easier it is to die cut.

Protection of thermal sensitive coating: During the die-cutting process, it is necessary to avoid damaging the thermal sensitive coating to avoid affecting the printing effect and durability of the label.

2、 Selection of die-cutting knife and sponge rubber strip

Die cutting blade type: Select the appropriate die cutting blade type based on the thickness and toughness of PET thermal sensitive silver paper. Usually, die cutters that have undergone hardness treatment are more suitable for cutting PET materials.

Hardness of sponge rubber strip: Choose a sponge rubber strip suitable for the hardness of PET thermosensitive silver paper to ensure stability and accuracy during the die-cutting process. Sponge rubber strips with a hardness of 60-75 degrees may be more suitable for die-cutting knife edges that are prone to fuzzing.

Installation of sponge rubber strip: The sponge rubber strip needs to be tightly attached to the blade of the die-cutting knife to avoid gaps during the die-cutting process, which may cause the paper's die-cutting edge to be serrated or not smooth.

3、 Die cutting pressure and precision control

Adjustment of die-cutting pressure: Operators need to gradually adjust the die-cutting pressure from small to large to avoid increasing the die-cutting pressure at once, which may cause damage to the die-cutting blade and base plate, and in severe cases, even damage to the die-cutting machine.

Accuracy guarantee: Choose high-precision cutting dies, such as laser cutting dies, to ensure that the precision of the die cut products meets the requirements. At the same time, operators need to follow standardized operating procedures to ensure consistency in die-cutting.

4、 Other precautions

Adhesive testing: Before die-cutting, the adhesive properties of PET thermosensitive silver paper should be tested to ensure that it will not cause label detachment or edge warping due to insufficient adhesive properties during the die-cutting process.

Control of foreign objects and dirt: Keep the die-cutting environment clean to avoid the impact of foreign objects and dirt on die-cutting quality.

Finished product inspection: Inspect the die cut finished product to ensure accurate dimensions, smooth edges, and no warping or peeling.

In summary, the die-cutting process of PET thermosensitive silver paper requires comprehensive consideration of material characteristics, selection of die-cutting blades and sponge rubber strips, control of die-cutting pressure and accuracy, and other precautions. Through reasonable process selection and strict operating standards, the quality of PET thermal sensitive silver paper labels produced by die-cutting can be ensured to meet the requirements.