Recycled plastic has become the best raw material for wood plastic

1. The recycling and treatment of waste plastics and the market prospects of plastic recycling and utilization?

China produces approximately 6-8 million tons of plastic waste annually, with large amounts of waste such as plastic films, fishing nets, beverage bottles, and packaging equipment that are difficult to dispose of, leading to "white pollution". Currently, the plastic recycling rate in China is less than 30%. Wood plastic materials are a new type of material that can generate high added value. Plastic recycling technology can not only provide a stable and economical source of raw materials for the development of the wood plastic industry, but also alleviate the negative impact caused by the continuous rise in oil prices.

2.What kind of material is wood plastic composite material?

Wood plastic composite materials are a basic material that is reversible, recyclable, covers a wide range of products, and has a diverse morphology and structure, mainly made from primary biomass materials such as crop fibers and forest product waste. By utilizing the principles of polymer interface chemistry and the characteristics of plastic filling modification, a certain proportion of plastic matrix is mixed and processed through special processes.

3. What are the five characteristics of wood plastic composite materials?

• 1. Resource utilization of raw materials refers to the comprehensive and effective utilization of resources that can be achieved through the use of certain raw materials.

• 2. The product can be plasticized to produce materials/products with different properties and shapes according to usage requirements.

• 3. Environmentally friendly application means that the wood/plastic substrate and commonly used additives of wood plastic composite materials are safe and environmentally friendly.

• 4. Cost economy refers to the transfer of low value materials from wood plastic products to high value-added products.

• 5. Recycling and regeneration, that is, the scrapped products and recycled waste of wood plastic materials can be 100% recycled.

4.What are the plastic raw materials used in the composite processing of wood plastic materials?

Thermoplastics mainly include nylon (PA), polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), and acrylonitrile butadiene styrene copolymer (ABS), including new materials, recycled materials, and mixtures of the two.

However, due to the poor thermal stability of wood fibers, thermoplastic materials with processing temperatures below 200 ℃ are more widely used in production. In practical applications, polyethylene and polypropylene substrates are mainly used for structural building products; Polyvinyl chloride substrate is mainly used for lightweight decorative building materials.

5. What is the mixing ratio of wood plastic composite materials in production?

From the current mixing ratio of plastic/wood in production, there are ratios ranging from 5:5, 4:6 to 3:7.

6. What is the role of plastic in wood plastic composite materials?

• 1. Adhesive action. Plastic is thoroughly mixed with wood powder under hot melt conditions, and after cooling, the loose wood powder can be bonded together to form a composite material with mechanical strength.

• 2. Enhancing the effect. Due to the role of plastic in bonding wood powder in the process of wood plastic composite, the properties of the plastic used play an important role in the properties of wood plastic composite materials. For wood plastic composite products of the same size and structure, the plastic properties used can be directly reflected in the performance of the composite material under the same wood powder ratio and process conditions.

7. What is the main basis for selecting plastic polymers?

The inherent characteristics of polymers, availability of raw materials, product performance requirements, cost, and level of mastery over them.

In addition, the melt flow index (MFI) of plastics also has a certain impact on the properties of composite materials. Under the same processing conditions, the MFI of resin is higher, the overall wettability of wood powder is better, and the distribution of wood powder is more uniform. The wettability and distribution of wood powder may directly affect the mechanical properties of the product, especially the mechanical performance indicators such as impact strength. So, the role of plastic in wood plastic materials can be said to be crucial.

8. What is the basic positioning of the development of China's wood plastic industry?

The basic positioning of the development of China's wood plastic industry is that in today's world, resources and environment are considered two major challenges, and the most distinctive feature of wood plastic materials is their wide range and renewable raw materials.

Wood plastic materials can reflect the characteristics of recycling from nature and returning to nature, in line with the feedback cycle process of "resources products waste regenerated resources", which can more effectively utilize resources and protect the environment, To achieve the national advocacy of achieving maximum economic and social benefits with minimal resource consumption and environmental costs, thereby harmonizing the material circulation process between the economic system and the natural ecosystem, and promoting sustainable resource utilization.