... fiber make the flooring more stable. 3.Closed or Sponge. PVC Flooring for commercial use Materials: made ... on. Backing: pvc foamed back or pvc closed back. Color: orange, red, blue,green,teal,gray, also can ... 3/2.6 kg/sqm Packaging: with kraft paper in roll or according to customer's request. Advantages:1. ... layer makes its more soft and good performance in sound absorption.For the closed back, high ...