Sinotapes (Shenyang) tape factory is an adhesive tape manufacturer engaged in R & D and manufacturing integration. Today, I would like to share with you how to check the quality of double-sided adhesive tape:
1. Check for cracks on the double-sided tape
When the double-sided tape is slit, if the slitting tool is not adjusted properly or the blade is not sharp enough, cracks will appear on the surface or bottom paper of the double-sided tape, and the fibers drawn from the crack will be stuck by the adhesive.
The occurrence of cracks may be continuous or random and may appear on one side of the roll of double-sided tape, or on both sides.
Therefore, before machining the double-sided tape, you must carefully check the bottom paper and surface. Whether there are small cracks on the paper.
Then, take a piece of sample paper that has undergone the above inspection, peel it off the bottom paper and check again whether there are cracks on the bottom paper and the bottom paper because the cracks are sometimes very small and can only be found after separating the bottom paper and the top paper.
2. Check whether the double-sided tape has burrs
The edge of the double-sided tape roll is smooth and undamaged, which is the basis to ensure the quality of the double-sided tape.
Therefore, before processing, you must carefully check whether the slitting edge of the double-sided tape rolls has burrs and whether it is damaged due to improper storage and transportation.
And roll down the roll of double-sided tape 4-5 times, carefully check the cutting edge.
3. Check if the edges of the double-sided tape are stuck, and if the bottom paper is missing silicon
If the edges of the double-sided adhesive tape are stuck or the backing paper is partially coated with silicone oil, it will cause the paper to break during the waste discharge process, which will prevent normal production.
Therefore, before processing, take a length of about 1 meter of self-adhesive material and peel it off by hand to see if there is any part that cannot be peeled smoothly and consistently on the edge or other parts.
Usually, the edge adhesion between the face paper and the bottom paper occurs on a slit roll of the entire roll of coated self-adhesive material, and generally only occurs at the outer layer of 7 meters to 10 meters, so when you encounter a slit roll There is adhesion on the edge of the double-sided tape.
Don’t immediately assert that the entire roll of paper has this problem.
In addition, it should be noted that peeling light-weight facial paper (such as 60g/m2 and 80g/m2 facial paper) is stronger than peeling heavy-weight facial paper. The lighter the facial paper, the tighter the hand feel during peeling.
Because of this, sometimes when die-cutting the double-sided tape selected by the customer according to the shape required by the customer, it cannot be completed at the normal processing speed.
4. Check whether the slitting end surface of the double-sided tape of the roll is straight and whether the rewinding tightness is consistent
If the slitting ends of the double-sided tape on the roll are not uniform, it will not only affect the registration during processing but also make it difficult to discharge waste due to the change of die-cutting position;
inconsistent elasticity during rewinding will cause changes in paper force during printing, Uneven tension will also cause printing quality problems.