The tape manufacturer reminds you how to distinguish the product quality of the double-sided tape. If the cutting tool is not adjusted properly or the blade is not sharp enough, cracks will appear on the surface paper or the backing paper of the double-sided tape, and the fiber pulled out of the cracks will be stuck by the adhesive.
The crack attack may be continuous or random. It may appear on one side or both ends of the double-sided tape of the drum. Therefore, before machining the double-sided tape, it is necessary to carefully observe whether there are small cracks on the bottom paper and the face paper.
Then, take a section of sample paper that has been inspected above, peel it on the backing paper and check whether there is any crack on the backing paper and backing paper again, because the crack is sometimes very small, which can only be found after separating the backing paper and the facing paper.
Check the double-sided tape for burrs:
The edge of the double-sided tape on the drum is bright and undamaged, which is the basis of ensuring the quality of the double-sided tape. Therefore, before processing, it is necessary to carefully check whether there is burr on the cutting edge of the double-sided tape on the drum, whether there is damage due to improper storage and transportation, and roll the double-sided tape on the drum down 4-5 turns, and carefully check the cutting edge.
Next, we mentioned how to check the appearance of double-sided tape. Today we will make up for some knowledge about this.
Double sided tape
Check whether the edge of double-sided adhesive tape adheres and whether the backing paper is missing silicon:
The edge adhesion of double-sided tape or the leakage of silicone oil on some areas of the backing paper will cause the paper to break when it is discharged and cannot be produced normally.
Therefore, before processing, we need to take a section of self-adhesive material about 1 meter long and peel it by hand to see if the edge or other parts cannot be peeled smoothly.
Generally, the edge adhesion of the face paper and the base paper occurs on a cutting roll of the whole roll of the self-adhesive material coated, and generally only occurs at the outer layer of 7-10 meters. Therefore, in case of the edge adhesion of the double-sided tape of the cutting roll, do not immediately assert that the whole roll of paper has this defect.
In addition, it should be noted that the force used to peel off light weight face paper is greater than that used to peel off heavy weight face paper. The lighter the face paper, the tighter the hand feel when peeling. Because of this, sometimes it is impossible to die cut the double-sided tape selected by the customer according to the shape required by the customer at the conventional processing speed.