How to identify quality PVC edge banding?
a.PVC edge of the containing calcium carbonate powder (commonly known as lime) content level.
PVC edge banding in general will contain calcium carbonate powder, calcium carbonate powder, but the content is too high then the structure of PVC will become loose, thereby seriously affecting the quality of PVC edge banding. Due to high levels of calcium carbonate powder issues arising are:
1) off white, that is to make small curved edge of the curved edges, some will appear in the play while bleaching, and this white will not be straight edge of the back after the recovery. This phenomenon is more obvious on dark.
2) jump edge, both for the edge of the trim is easy to produce bounce mouth. Of course, while jumping is not the only causes of high levels of calcium carbonate powder. When doing the edge, when the edge of the hot melt adhesive and the speed of the feed does not reconcile well, it will result in time for trimming the edge of the adhesive sheet has not yet fully on the edge of the float so as and prone to jumping side phenomenon.
3) After trimming and edging the edge of the edge of the gloss differential, and thus the appearance of the effect on the poor.
Currently on the market in order to reduce the cost of poor quality edge banding, in which the calcium carbonate content of up to 60%. The same brand equivalent products are the main differences is their calcium carbonate content.
4) cracking, due to high levels of calcium carbonate, resulting in no edge of toughness, the internal structure of the loose, a little by the external force will crack, especially in the low temperature transport them.
b. self-adhesive (bridging agent)
PVC is not very good at the plate on the direct bonding, self-adhesive (not actually glue, but play a role in the middle of the bridge, it is also known as cross-linking agent) the quality of good or bad, directly affect the bonding effect. Especially in cold weather when the plant is relatively low temperature, hot melt adhesive and the efficiency is greatly reduced, which is often blamed on Edge of the furniture manufacturers of quality. The best approach is replaced with relatively high viscosity and high purity melt, hot melt adhesive to improve the working temperature, increase the room temperature, warm-edge of (to ensure quality).
c. Edge of the arc itself
Edge of the bonding in extrusion, in order to prevent the loss of glue, a good edge in the width direction of the bar should be a little on the inside bend. The Edge of poor quality compared to flat or even anti-Alice, and thus prone to poor adhesion.
References: http://www.suyifbt.com/bbx/217799-499396.html
