Before using self-adhesive stickers, it is important to test the type of adhesive to see if the adhesive is self-adhesive hotmelt or glued paper. Some adhesives react chemically with certain substances. For example, stickers used as signs can stain some special fabrics under certain conditions. Some stickers that require short-term tack have long-lasting tack under exposure conditions. On the other hand, some stickers that require long-lasting stickiness will lose their stickiness on certain surfaces.
Customers often consult that the stickers are not strong enough. The reasons are complex. Some unknown customers will think there is something wrong with the quality of the stickers. In fact, the adhesive materials are materials of well-known manufacturers and do not exist. Quality problems, but it is possible that the customer did not specify the adhesive requirements, or did not conduct a trial-paste experiment before mass-pasting, which may lead to the adhesiveness not meeting the ideal requirements.
1. Initial adhesion: The commonly used method is the rolling ball method, which is to fix the glued side up on an inclined surface, and then let the standard steel balls (different sizes) slide down from the top, and the larger steel balls can be glued combined, which means that the initial viscosity is greater.
2. Adhesion strength: Use self-adhesive hooks to stick two standard steel plates, then hang one steel plate on the fixing frame, and put a 2kg weight on the other end to see how long the steel plate below will not fall off. Calculated by duration.
3. Peeling force: stick the self-adhesive on the standard steel plate, and use the instrument to peel off the self-adhesive at a constant speed. The force that the instrument uses several times is the peeling force of the sticker.
