
Technical indicators of large-caliber flat hose performance
Item Inner rubber layer Outer rubber layer
Tensile strength,MPa≥ 20 20
Elongation at break,% ≥ 350 350
Determine air aging performance(70℃士2℃×168h)
Tensile strength retention rate,%≥ 80
Retention rate of elongation at break,% ≥ 80
Performance after receiving liquid
Tensile strength retention rate,%≥ 70 70
Retention rate of elongation at break,%≥ 70 70
Volume expansion,% ≤ 40 70
Performance after immersion in water (23℃±2℃X14d)
Tensile strength retention rate,%≥ 70 70
Retention rate of elongation at break,% ≥ 70 70
Brittleness temperature,℃≤ -55 -55
Acid and alkali resistance
Tensile strength retention rate,%≥ 70 70
Retention rate of elongation at break,%二 70 70
Volume expansion degree,%≤ 40 40
Production process description and delivery period of mine polyurethane hose
1. Raw material selection
Purchase corresponding polyester filament and TPU raw materials (high quality raw materials)
2. The polyester filament is installed on the loom for the production of hose framework layer and the quality inspection of polyester industrial yarn
3. One time extrusion molding, weaving semi-finished products and TPU raw materials to the extrusion section, through the mold one-time extrusion molding.
4. Water pressure test
5. Coiling
6. Printing
7. Warehousing
8. Packaging, according to the requirements of packaging size
9. Loading of finished products