In fields where safety and environmental friendliness are non-negotiable—such as medical devices and food packaging—material selection carries immense responsibility. Sinopec's domestic polybutene-1 (PB-1) has emerged as a trusted solution, having passed China's strictest certifications: the China Environmental Label (Ten-Ring Certification) and food contact safety testing (GB 4806.7). These credentials not only validate its purity and eco-friendliness but also enable its direct application in critical scenarios where human health is paramount.

Dual Certifications: A Seal of Purity and Sustainability

1. China Environmental Label (Ten-Ring Certification): Setting the Bar for Green Production

The Ten-Ring Certification, administered by the Ministry of Ecology and Environment, is China's highest environmental standard for products. It evaluates the entire lifecycle—from raw material extraction to production, usage, and disposal—ensuring minimal environmental impact.

Sinopec's PB-1 meets stringent criteria:

· Low carbon footprint: The liquid-phase bulk polymerization process reduces energy consumption by 30% compared to traditional solution methods, cutting carbon emissions by 220 tons per 1,000 tons of production.

· Non-toxic emissions: Zero volatile organic compounds (VOCs) are released during manufacturing, and wastewater treatment meets Class A discharge standards.

· Recyclability: Post-consumer PB-1 products can be recycled into secondary raw materials, with a recovery rate exceeding 90%, aligning with circular economy principles.

2. GB 4806.7: Validating Safety for Food Contact

GB 4806.7 is China's mandatory standard for food contact plastics, regulating migration of harmful substances (e.g., heavy metals, plasticizers) to ensure they pose no risk to human health.

Sinopec's PB-1 passed rigorous tests:

· Migration limits: Under 40℃ for 10 days, total migration of substances into food simulants (water, acetic acid, ethanol) was less than 0.5 mg/dm²—far below the standard limit of 60 mg/dm².

· Heavy metal-free: Lead, cadmium, and mercury levels were undetectable (<0.01 mg/kg), meeting the strictest requirements for infant food packaging.

· Odorless (odor-free): Post-sterilization, the material remains free of unpleasant smells, critical for sensitive applications like dairy and pharmaceutical packaging.

Trusted in Critical Applications: Medical Devices and Food Packaging

1. Medical Devices: Safeguarding Patient Health

In medical settings, material safety directly impacts patient well-being. Sinopec's PB-1 is used in:

· Infusion tubes: Its smooth surface resists bacterial adhesion, while flexibility prevents kinking during use. Tests per ISO 10993 (biological evaluation) confirmed no cytotoxicity or skin irritation.

· Dialysis equipment: Compatible with blood and dialysis fluids, with minimal leaching even after 24-hour contact, ensuring treatment safety.

A leading medical device manufacturer in Jiangsu reported that switching to Sinopec's PB-1 reduced product rejection rates by 30% due to its consistent purity, compared to imported alternatives with occasional batch variations.

2. Food Packaging: Preserving Freshness and Safety

In food packaging, PB-1's inertness and barrier properties shine:

· Refrigerated packaging: Used for meat and dairy trays, it withstands -40℃ freezing without releasing harmful substances, unlike some PP materials that become brittle and leach additives.

· Heat-resistant containers: Microwave-safe up to 120℃, making it suitable for ready-to-eat meals. A study by a Shanghai food lab showed no chemical migration after 10 cycles of microwave heating.

· Edible oil packaging: Its resistance to oil permeation reduces oxidation, extending shelf life by 15% compared to traditional PE bottles.

Environmental and Health: A Synergistic Advantage

What sets Sinopec's PB-1 apart is its ability to excel in both environmental sustainability and health safety—a rare combination in high-performance plastics. While some materials prioritize one over the other (e.g., certain biodegradable plastics lack food contact safety), PB-1 achieves a balance:

· Production: Solvent-free polymerization eliminates hazardous waste, supporting green manufacturing.

· Usage: Non-toxic and stable across temperature ranges (-40℃ to 120℃), ensuring safety in diverse applications.

· End-of-life: Recyclable and non-persistent in the environment, reducing plastic pollution.