Test method for stickiness of self-adhesive stickers

1. All kinds of stickers. Before use, it is very important to check the type of adhesive to see if the adhesive is self-adhesive, heat sealable or glued. Some adhesives react chemically with certain substances.

1. The self-adhesive stickers used as signs will contaminate some special fabrics under certain conditions. Some labels that require short-term tack will develop permanent tack under exposure conditions. On the other hand, some labels that require long-term tack will lose tack on certain surfaces.

2. Too low temperature can also cause problems. Low temperatures will slow down bonding and the label may peel off the surface before the adhesive adheres to the surface. If labels are stored incorrectly—with large temperature fluctuations, humidity fluctuations, or improper stacking—the labels can lose their tack quickly after use.

2. One of the important factors for the effective use of self-adhesive is to correctly remove the self-adhesive film on the surface of the backing paper.

Many people pull the left or right corner of the label by mistake, which reduces the stickiness of the sticker in the contact area, and also destroys the "surface fibers" in the material, causing the label to curl.

The correct way to peel the sticker from the surface of the backing paper is to keep the label as straight as possible and to separate the backing paper from the center of the top or bottom edge so that the label sticks well attached to the surface. A thing.

3. The stickiness of self-adhesive trademark printing is not firm, which is not necessarily a quality problem of the sticker. It may be that the stickiness is not understood, so the stickiness does not reach the ideal state. We can test the stickiness of stickers by following three points:

1. Initial bonding: The commonly used method is the rolling ball method, that is, fix it on the inclined surface with the glue side up, and then let the standard steel balls (different sizes) go from top to bottom Sliding, the larger steel ball can stick, indicating that the initial viscosity is larger.

2. Adhesion: that is, use self-adhesive hooks to glue two standard steel plates, then hang one steel plate on the fixing frame, and put a 2kg weight on the other end. See how long the steel plate at the bottom can hold up. Away is calculated by duration.

3. Peeling force: stick the self-adhesive sticker on the standard steel plate, tear off the self-adhesive with a tool at a constant speed, and use the tool several times, this force is the peeling force and self-adhesive plate. glue.