Polyolefins are the world's most widely used plastics — and with that scale comes responsibility. At Liansheng, we take that responsibility seriously across three dimensions: environmental stewardship, safety and compliance, and innovation that advances the circular economy.
Polyolefins (PE/PP) are thermoplastics — they can be melted and reprocessed multiple times without fundamental chemical change. This inherent recyclability makes them one of the most suitable plastic families for a circular economy, when supported by the right collection, sorting, and reprocessing infrastructure.
PE and PP are among the most mechanically recyclable plastics. Post-consumer and post-industrial waste is collected, sorted, cleaned, and regranulated into rPE and rPP pellets suitable for non-food applications — pipes, automotive parts, construction materials, and packaging.
We help clients source both virgin and recycled grades, supporting their transition toward higher recycled content targets.
Mono-material packaging solutions — using a single polymer type instead of multi-layer laminates — are significantly easier to recycle. We guide clients in selecting grades that enable mono-material designs while maintaining performance.
The EU Packaging and Packaging Waste Regulation (PPWR) requires 10% recycled content in contact-sensitive packaging by 2030 — we help clients prepare.
High-flow and high-melt-strength PP grades enable thinner walls, lighter parts, and foamed structures — reducing material usage by 20-60% without sacrificing performance. Less material means less carbon footprint per unit produced.
Our EP548R (high-flow impact copolymer) is engineered for thin-wall injection molding — directly supporting lightweighting goals.
Polyolefins have a high calorific value (comparable to fuel oil), making them suitable for energy recovery at end-of-life when recycling is not viable. Clean incineration with proper emission controls can generate 20-47 MJ/kg of thermal energy.
This positions polyolefins favorably vs. other materials in full life-cycle assessments.
Polyolefins are composed solely of carbon and hydrogen — the same elements that make up natural fats and oils. They contain no plasticizers, no heavy metals, and no halogens in their base resin form. This intrinsic safety, combined with rigorous documentation, makes them the material of choice for food contact, medical, and hygiene applications worldwide.
Our food-grade grades comply with major international regulations:
Every shipment is backed by complete documentation:
PE and PP resins are classified as non-hazardous ordinary goods for transport:
Food-grade grades undergo rigorous migration testing per regulatory standards:
The polyolefin industry is not standing still. Breakthroughs in catalyst technology, polymer architecture, and circular design are creating grades that are lighter, stronger, more processable, and easier to recycle. We track these developments to help our clients access the latest advancements.
High melt flow rate grades like EP548R (MFR ~25-30) enable thin-wall injection molding — producing lighter parts with faster cycle times. This reduces material consumption, energy use, and cost per unit, while maintaining mechanical performance.
Applications: food packaging, disposable containers, thin-wall housewares.
Advanced HMS PP grades enable foamed structures that are 60-90% lighter than solid alternatives. These materials support mono-material designs that are fully recyclable — ideal for automotive interiors, packaging, and construction insulation.
HMS PP foams represent a breakthrough in lightweight, recyclable material solutions.
Mono-material solutions replace complex multi-layer laminates with single-polymer structures that are easily recyclable. We help clients identify grades that enable this transition without compromising barrier or mechanical performance.
This is essential for compliance with emerging EU PPWR and EPR regulations.
Fiber-grade PP like HP565S enables high-speed spunbound lines (400-600 m/min) with narrow molecular weight distribution and low extractables — critical for hygiene and medical nonwovens where purity and fabric uniformity are paramount.
These grades support the growing demand for sustainable hygiene and medical products.
The polyolefin industry is actively researching degradable-by-design polymers, advanced chemical recycling, and digital traceability systems. As these technologies mature, we are committed to bringing them to our clients — helping manufacturers worldwide meet their sustainability targets without compromising on performance or cost.
Research into cleavable bonds in polymer backbones enables controlled deconstruction under mild conditions.
Converting post-consumer polyolefin waste back into monomers or pyrolysis oil for virgin-quality resin.
Blockchain and IoT-enabled supply chains providing full material provenance and recycled content verification.
Whether you need food-grade compliance documentation, recycled content grades, or lightweighting solutions — we can help. Tell us your sustainability goals.