New SL500 Machine Enhances PET Recycling by Removing Grease Adhesives

As global emphasis on sustainability and circular economy grows, the plastic recycling industry is undergoing unprecedented transformation. Polyethylene terephthalate (PET), one of the most widely used plastics, has become a focal point for recycling efforts. However, persistent challenges with oil residues, food contaminants, and stubborn label adhesives have long compromised the purity of recycled PET, directly affecting the quality and market value of recycled plastic.

PET's excellent transparency, toughness, and barrier properties make it ideal for beverage bottles, food packaging, and textile products. Yet collected PET waste inevitably accumulates various contaminants:

• Residual liquids and organic matter from beverages
• Stubborn oil and grease residues
• Pigments and dyes that penetrate plastic surfaces
• Problematic label adhesives that create black spots
• Dust and dirt from collection processes

The SL-500 hot washer addresses these challenges through an integrated system combining high temperatures, optional chemical agents, and mechanical action to achieve deep purification.

The system rapidly heats water to 90-100°C, effectively softening contaminants, enhancing cleaning agent activity, and facilitating label adhesive removal.

Automated temperature control maintains optimal conditions while powerful agitation ensures thorough cleaning through continuous material movement.

Specially designed blades create intense friction that physically removes even the most stubborn residues from PET surfaces.

The system offers adaptable dimensions, material thicknesses, heating methods, and internal configurations to meet specific production requirements.

Thoughtful design elements like easily accessible components and smooth interior surfaces minimize downtime and operational costs.

In typical operation, contaminated PET flakes undergo intensive cleaning in the SL-500's heated, agitated environment. The process significantly improves material quality by:

• Producing higher purity recycled PET pellets
• Enabling use in premium applications including food-grade packaging
• Increasing processing efficiency and economic returns
• Supporting environmental sustainability goals

The standard SL-500 model features:

• 2m height × 1.3m diameter dimensions
• 4mm standard shell thickness (customizable)
• 8mm base thickness
• Carbon steel construction
• 4kW rated power
• Optional electric or steam heating

This technology represents a significant advancement in plastic recycling capabilities, offering manufacturers improved quality control and expanded market opportunities for recycled PET products.