PVC foam board

PVC Co-extrusion Board, also known as PVC Multilayer Board, which also is a kind of PVC foam board, is a versatile material that has gained popularity in various industries due to its unique properties. 

PVC foam boards are differentiated into three types based on their manufacturing processes: PVC Celuka Board, PVC Free Foam Board, and PVC Co-extrusion Board.

One of the key characteristics of this board is its water absorption capabilities, which is an important factor to consider for applications where moisture resistance is crucial.

How is the Water Absorption of PVC Co-extrusion Board

Introduction

PVC, or Polyvinyl Chloride, is a widely used plastic material known for its durability, flexibility, and resistance to various environmental factors. The co-extrusion process involves the simultaneous extrusion of two or more layers of PVC material, creating a composite board with enhanced properties. This article will explore the water absorption characteristics of PVC co-extrusion boards and their implications for various applications.

Understanding Co-extrusion

Co-extrusion is a manufacturing technique where multiple layers of material are fused together to create a single product. In the case of PVC sheet, the process typically involves an inner core of a softer PVC layer, which is then encased by a harder, more durable outer layer. This construction not only enhances the board's structural integrity but also affects its water absorption properties.

Water Absorption Properties

Low Water Absorption Rate

PVC board are designed to have a low water absorption rate, which is a critical feature for applications in wet environments or where the board may be exposed to moisture. The low water absorption rate is achieved through the selection of appropriate PVC formulations and the co-extrusion process, which creates a dense and tightly bonded structure.

Barrier Layer

The outer layer of the co-extrusion board acts as a barrier against water penetration. This layer is typically made from a more rigid and less permeable PVC compound, which helps to prevent water from seeping into the board's core.

Impact on Durability

The low water absorption rate significantly contributes to the board's durability. By resisting water absorption, the board maintains its structural integrity and does not swell or warp, which are common issues with materials that absorb water.