PU leather is a combination of PVC and synthetic leather finished leather Peel test differences

The peel test for PU (polyurethane) and PVC (polyvinyl chloride) leather operates on the same principle as the equipment, but due to differences in material properties and fabric structures, there are significant differences in the standards and values for testing and determining values.

Below are the specific differences and details of the peel-off tests between the two:

1. Testing methods and principles (basically the same) Testing equipment: Use a tensile testing machine to clamp the two peeled layers and separate the surface layer from the bottom at a fixed speed (such as 100 mm/min or 300 mm/min). Cutting test strips: Samples are usually cut into test strips of specific widths (such as 1 inch or 25 mm).

2. Differences in material and structure (testing standards need adjustment) PU leather: The surface is usually softer and more flexible, often using breathable base fabric (such as knitted or cotton fabric). Because the fabric is thinner and fits tightly, it is more likely to experience ‘surface or coating cracking’ during testing rather than the expected ‘delamination’. Sometimes adhesives or special fixtures are needed to reinforce the edges and avoid interruptions in testing. PVC leather: The bottom layer is mostly plastic film or woven fabric, which feels harder and has a stronger plastic feel. Because the surface layer and base fabric are thicker and stiffer, the tensile force changes significantly during the peel test.

3. Durability and Standard Requirements Difference Test Specifications: International standards such as ISO, ASTM or specific inspection standards for artificial leather usually classify PU and PVC as separate categories. Standard value setting: Due to differences in physical structure, PVC can generally withstand greater peel forces; The standard value for PU leather’s peel strength requirements usually varies depending on the product’s intended use, such as sofas, furniture, or shoe uppers.