Ensuring Superior Quality in Recycled Polymer Pellets > 자유게시판

Assessing recycled polymer granule integrity is critical for consistent end-product performance

Start by visually inspecting the granules for uniformity in color and size

Uneven particle forms, abnormal coloring, or foreign particles such as dust or metal fragments suggest inadequate separation or washing processes

Next, check for moisture content using a moisture analyzer or oven drying method

High moisture content risks porosity and reduced mechanical integrity, necessitating a threshold of less than 0.1% for most plastic types

Determine the melt flow rate to evaluate the polymer’s fluidity under heat

It indicates potential chain scission resulting from thermal or mechanical stress in prior applications

A significant drop in melt flow compared to virgin material may mean the polymer has lost molecular weight and may not be suitable for high performance applications

Conduct density testing using a pycnometer or buoyancy method

Different polymers have known density ranges, and deviations can signal contamination or mixing of incompatible plastics

Assess performance metrics like yield strength, ductility, تولید کننده گرانول بازیافتی and shock absorption using standardized molded test bars

Benchmark findings against industry standards or customer requirements for the target product

When results underperform, consider diluting with fresh polymer or subjecting the granules to additional refining cycles

Use Fourier transform infrared spectroscopy to identify chemical composition and detect unwanted additives or cross contamination from other plastic types

Use thermal scanning to analyze melting point shifts and recrystallization patterns

Changes in these temperatures can indicate degradation or the presence of impurities

Ensure comprehensive documentation and preserve archived specimens for audit and quality review

Systematic quality control validates performance and strengthens the credibility of recycled polymers in green manufacturing initiatives