Plastic plate

A thermoplastic sheet is heated to its softening temperature, then formed over or into a mold using vacuum or pressure, and trimmed to create the final plate. Common materials include PP (durable and heat-resistant), PS (cost-effective for disposables), PET (clear and glossy), and PLA (biodegradable for eco-friendly applications).

Consistent wall thickness depends heavily on uniform sheet heating. Inconsistent heating creates temperature gradients that cause uneven stretching during forming, resulting in thin spots or weak areas. Use a well-maintained oven with consistent heat distribution, and consider plug-assist forming for plates with complex geometries.

Warping results from uneven cooling, improper material temperature, or excessive sheet heating. To prevent warping, ensure cooling is applied uniformly across the formed plate, maintain proper material temperature before forming, and avoid overheating the sheet. Post-forming cooling fixtures can also help maintain flatness.

Yes, recycled PET (rPET) is increasingly used in thermoforming for plates and trays, responding to sustainability requirements in the food service sector. However, recycled materials may have different flow properties and require adjusted processing parameters. Testing is recommended before full-scale production.

Production speeds typically range from 15 to 35 cycles per minute, depending on plate size, material thickness, and mold design. Smaller plates with thin walls can achieve higher speeds, while larger plates require longer heating and cooling times, reducing overall output.