The utility model discloses a double -
deck rubber band, solve the problem that current product double -
deck structure is actually simple superposition, tenacity and strength are insufficient. The
rubber band includes double -
deck muscle and both sides reinforcing rib, the first layer
muscle film and the second layer
muscle film of double -deck muscle realize molecular chain crosslinking through arc strength film, and arc strength film adopts gradient
vulcanization process and forms
covalent bond connection, promotes interlayer peeling strength to 4.5N / mm, solves interlayer peeling problem. The reinforcing rib is composed of arc reinforcing sheet, first reinforcing strip, second reinforcing strip and reinforcing column, forms the three -dimensional
support system similar to " I -steel ", and reinforcing column is evenly distributed in double -deck muscle both sides, and the stress is dispersed when drawing, and local strain is reduced. This design makes the
rubber band breaking elongation reach 800%-1000%, and the fatigue life is improved by more than 5 times, is applicable to industrial packaging, sports training and other high -frequency tensile scene, and the
mechanical property is enhanced significantly.