NIEPOOMICE, 16.03.2017 What is meant WPC? Shortcut WPC (Wood - - PowerPoint PPT Presentation

NIEPOŁOMICE, 16.03.2017

What is meant WPC?

Shortcut WPC (Wood Plastic Composite) is the wood- plastic materials combine the functionality of wood flour and polymer matrix. The first products of this type were produced in 1919, by Rolls Royce. It was a shift knob in cars. Material was resin Bakelite and wood filler. Most currently used materials for the production of WPC are PP, HD-PE, PVC. Global trends of production:

• US market and Asian based mainly on HD-PE
• European market focuses on the production of PVC

and PP

Comparing the basis of polymers available on the European market

Properties Polipropylene (PP) Polietylene (HD-PE) Polyvinylchloride (PVC)

General properties

• high chemical resistance
• better mechanical properties than

the HD-PE

• low resistance to temperatures

below 0 ° C

• low resistance to weather

conditions, degraded by oxygen contained in air

• small water absorption
• high chemical resistance
• high flexibility
• high impact resistance
• High mechanical strength
• low resistance to weather

conditions

• low water absorption
• very high chemical

resistance

• high mechanical strength
• very high flame class
• resistant to weathering and

UV Density [g/cm3] 0,91 0,96 1,4 The tensile modulus E [MPa] 1300 - 1800 600-1400 2700-3000 Fire reaction class Efl - A very large part in fire Cfl - Limited but noticeable part in fire Bfl - Very limited participation in fire Euroclasse product classification for reaction to fire indicates whether and how the product contributes to the development of the fire, ie. how fast it burns and how much energy at the same time produces. Reaction to fire tests. They are carried out on the basis

• f PN-EN 13501-1.

WPC is not only polymers

Additives used in production WPC composites:

Wood Fibre - it si contained in 45% of product. The wood fibers used in the manufacture comes from conifers tree and they are selected. The wood fibers are subjected to roughing operations. This procedure aims to increase the affinity of the fibers to the polymer UV stabilizers and antioxidants- prevent of degradation during sunlight treatment of product surface. Pigments - They are very important because they care about the protection of the color of the product. Thermo stabilizers for PVC based on Zn-Ca particles not Pb.

Why additives are so important

Disadvantages of WPC profiles

Figure 1. Free radicals effect. Collapses in boards. Source – internet.

Cracking surface of the boards and collapse due to lack of adequate protection from UV radiation. The use of low-quality plastics additives cause acceleration of degradation of the product. In the pictures are visible signs of fungal infections that results from the use of poor quality wood fiber (Figure 2) and cheap pigments effect (Figure 3). Figure 2. Source – internet. Figure 3. Source – internet.

Disadvantages of WPC profiles

In the case of products made in co-extrusion technology problem is the combination of two different materials in a single product. Often this manifests itself cracks on their border. Figure 4. Co-extrusion product with cracking between two layers of mterial.

Source – own research.

Boards produced in co-extrusion technology, after scratching the surface, reveal the inner layer with worse properties. Boards which have pigment throught whole cross-section of the product is better because after a few years you can make refresh the terrace by brushing. Figure 5. Co-extrusion board with scratching. Source – own research.

How we care for the quality of our products

Machine for test mechanical properties of

• product. Labtest

5.10 ST Chamber to study the impact of weather conditions on the product. Solar Box 1500e Device for color measurement. Colorimeter NH 110 Scales for measuring

• density. Radwag AS

160.R2

Inside of factory

Our realizations