The skeleton material of the belt has been improved, and the skeleton of the V-belt determines the strength and life of the tape. Early reinforcement layer use
Cotton cords were then replaced with strong rayon cords. Due to the shortcomings of elongation, since the 1970s, all countries in the world have
Polyester cords with high strength, small elongation, heat resistance and good bending resistance were used throughout the 1980s. In the 1980s, modified polyester with high elongation and low shrinkage appeared.
Ester cords have become the mainstream of V-belt materials. For speed change belts requiring high load transmission and impact resistance, and V type for agricultural machinery
Belts, some have begun to use aramid fibers. The reinforcing layer of the toothed belt, the long-term use of steel wire and polyester to reduce the strength
The problem, as well as the high-speed rotary transmission due to its large size, has now been basically eliminated. Use poly canis cords for requirements
Products with high dimensional accuracy are rarely used due to scaling problems. The best skeleton material is currently considered to be fiberglass, which
It can make the elongation of the meshing transmission small, and has a moderate linear expansion coefficient, and the lack of rigidity such as bending fatigue can not be widely
General use. In the future, aramid fibers with higher strength and better bending resistance will be able to partially replace the glass fibers and squeeze into the toothed belt.
The ranks of the skeleton materials. At present, there is a flawless polyester tempered monofilament skeleton on the market, which is relatively inexpensive.
The characteristics of high strength, good flexability and long service life have gradually been recognized by everyone.