Plastics and Other Materials (Junior Cert Wood Technology): Revision Notes

Materials in Wood Technology

In wood technology, different materials can be used instead of or alongside wood. These include metals, ceramics, and fabrics. It's important to know their properties and how they differ from wood and plastics. This knowledge helps in making sustainable choices. Many projects now use these materials with wood because they work well together.

Definitions

• Metals: These are strong, shiny materials that conduct electricity and heat well but are not as eco-friendly as wood.
• Ceramics: These are hard and long-lasting, made by heating. They are tougher to shape than wood.
• Fabrics: Made from woven fibres, they are flexible and warm. Their eco-friendliness depends on the type.

Overview of Other Materials

• Metals:
  • Examples include steel and aluminium.
  • Known for strength and good conductivity.
  • Comparison: Stronger than wood but less eco-friendly due to energy use in production.
• Ceramics:
  • Examples include porcelain and tungsten carbide.
  • Known for toughness and heat resistance.
  • Comparison: More durable than wood but less easy to work with.
• Fabrics:
  • Examples include cotton and polyester.
  • Known for flexibility and insulation.
  • Comparison: More flexible than wood but sometimes less durable.

Comparison with Wood and Plastics

• Durability: Metals and ceramics are usually more durable than wood and plastics.
• Workability: Wood is easier to work with than metals and ceramics; fabrics are very flexible.
• Environmental Impact: Wood is generally more eco-friendly than metals and plastics.

Table: Comparative Analysis

Property	Metals	Ceramics	Fabrics	Wood	Plastics
Durability	High	High	Moderate	Moderate	Moderate
Cost-effectiveness	Moderate	Variable	Low to medium	Low to high	Low
Workability	Medium	Low	High	High	High
Environmental Impact	High	High	Moderate	Low	Medium

Social and Environmental Impacts

• Metals: Production uses a lot of energy and harms the environment. Wood is better for the planet.
• Ceramics: Making them uses much energy, and disposal is hard. Wood is biodegradable, making it better for getting rid of.
• Fabrics: Synthetic ones use oil and energy, while natural ones use resources. Wood uses less energy overall.

Sustainable Practices

• Recycling: Metals and fabrics can be recycled, but ceramics cannot.
• Biodegradable Alternatives: The use of biodegradable fibres is on the rise.
• Responsible Sourcing: This is vital for making wood projects sustainable.
• Case Studies:
  • Using recycled metals in wooden furniture lowers the environmental impact.

Summary