Why so much polymer?
This week I look at why we use so much polymer in our glass and window transportation systems and factory racks.
The term "polymer" is widely used to describe plastics, and the polymers which we use on our racks are high tech plastics. Racks we made 20 years ago had rubber bearing surfaces as at that time rubber was predominantly used by the glass and window industries as a better bearing surface than timber.
The shortcomings of rubber are that it leaves a residue on the glass which becomes visible when the glass condensates. Rubber also tends to change its hardness and change its shape in different weather and temperature conditions. These changes make rubber less suitable for sliding and moving parts, and its "stickyness" to hold the glass items varies. Lastly rubber deteriorates in the weather so for outside applications such as vehicles it has a finite lifespan.
The right choice of polymer addresses all of these issues, and is the best product currently available. Polymer is able to be either injection molded or extruded. This means that most shapes can be formed, and it's ideal for moving and sliding parts such as our retention blocks.
There has been no rubber used in transportation racks manufactured by The Glass Racking Company for many years.
The migration from rubber to polymer bearing surfaces may seem like a small one but the benefits to the end users are significant.