◆ polyvinyl chloride (PVC)
PVC wide source of raw materials, low cost production technology is mature, Cheap dunks from china and based on adding different additives and different amount of additives can produce transparent and opaque products and different products such as software and hardware, so the change in color on respond quickly change the color of shoes. But the PVC impact strength, low thermal distortion great resilience as polyurethane.
PVC soft cushion series, trombone series with the thermoplastic polyurethane used in the design and location all have similarities, and more for the heel, can design a different color pattern, used to feel effects and visual effects of double incom
Hard PVC cushion series, with harder PVC material, designed a variety of air-cushion compression-resistant colors. Generally more used to the heel, shape similar to the honeycomb structure.
Classification by structure to use parts
◆ Full length cushion
Outline the contours of the bottom with large, full palm cushion for exposed windows Cheap nike shoes, and large junction bottom edge of the gas chamber thickness is about 10-20mm, wall thickness 1-1.4mm, soft, high elasticity; than the thickness of the middle part of the chamber small, about 2-6mm, poor flexibility, a supportive role from the beams; the middle of a solid part of the thickness of 2-3mm, from the association role. Forefoot thinnest thickness of 10 mm, the thickest followed by the thickness of 20mm, the air cushion from heel to forefoot is a wedge-shaped structure. Full length cushion hidden edge the thickness of 1-1.2mm, the thickness of chamber 2-4mm, solid part of the same thickness and edge thickness 1-1.2mm.
Fenestration series of structure has the following three kinds:
1, margin of the overall structure of a gas chamber;
2, edge chamber disconnected from the metatarsophalangeal joints for the three air chamber;
3, in the metatarsophalangeal joint and flank parts are broken, the edge is divided into six chambers Men shoes, the gas chamber lumbar back of knee to be the thickest, up to 23mm, shock absorber and can play both the role of support and stability.
◆ Semi-palm cushion
From the metatarsophalangeal joints to heel, lumbar back of knee chamber thickness is the thickest part of the air cushion, air cushion and full palm design features the same stabilizing effect from the shock absorption and support. Lumbar back of knee chamber thickness 20-25mm, followed by parts of the general 18-20mm, the middle part and the solid part of the design size with full size palm cushion.