Smooth HDPE Geomembrane

Introduction

Smooth HDPE geomembrane is a high-density polyethylene synthetic membrane with a low-permeability smooth surface. It controls fluid and gas migration in human-made structures — from municipal landfills to aquaculture ponds, reservoirs, and chemical containment basins. At Shanghai Yingfan, every roll is produced from 100% virgin HDPE resin blended with precisely calibrated additives (97.5% HDPE : 2.5% carbon black, antioxidants, UV absorbers, and stabilizers), then formed through Italian-imported triple co-extrusion equipment.

Unlike textured geomembrane variants, the smooth surface offers the lowest possible permeability and is the preferred choice wherever leakage risk must approach zero. This page covers what sets Yingfan's smooth HDPE geomembrane apart — from production technology and quality standards to specification ranges and application guidance.

Product Specifications

Shanghai Yingfan operates four geomembrane production lines — two dedicated to world-class HDPE, one to textured HDPE, and one advanced imported line — enabling a complete specification range.

Material Composition & Manufacturing

Yingfan's smooth HDPE geomembrane begins with raw material compounding: premium HDPE polymer resin is blended with masterbatch additives in a tightly controlled 97.5 : 2.5 ratio. This formulation — consistent across every production run — balances structural rigidity, UV stability, oxidative resistance, and long-term flexibility.

The compounded feedstock passes through three co-rotating extruders operating in a blow-film configuration, producing a seamless, continuous membrane sheet. The triple-layer architecture eliminates pinhole defects and ensures consistent thickness across the full roll width. Post-extrusion cooling, tension-controlled rolling, and woven geotextile bag packaging complete the process — all handled by automated equipment with in-line thickness monitoring.

Key Performance Properties

Every physical and mechanical property of Yingfan smooth HDPE geomembrane is verified against GRI-GM13 and ASTM test methods. Below are the most performance-critical attributes specified for overseas procurement.

• Permeability: ≤ 1.0 × 10⁻¹³ g·cm / (cm²·s·Pa) — among the lowest achievable for any geosynthetic liner material.
• Chemical Stability: Resistant to acids, alkalis, salt solutions, oils, and alcohols — suitable for sewage treatment, landfill leachate containment, and chemical tank liners.
• Puncture & Root Resistance: High puncture strength prevents mechanical damage during installation and resists penetration by most plant root systems.
• Aging Resistance: 85 °C oven aging retention — standard OIT: ≥ 55% after 90 days; high-pressure OIT: ≥ 80% after 90 days — exceeding typical industry expectations.
• Mechanical Strength: Tensile strength, tear resistance, and puncture resistance all meet or exceed GRI-GM13 minimums.
• Environmental Formulation: Non-toxic raw materials meet international food-grade standards — approved for drinking water reservoirs and aquaculture ponds.

Applications & Use Cases

Smooth HDPE geomembrane is deployed globally across eight major application categories. Below is the primary use-case matrix for procurement teams evaluating liner solutions.

Manufacturing & Facility

Shanghai Yingfan Engineering Material Co., Ltd. is headquartered in Shanghai and is one of the city's largest professional HDPE geomembrane manufacturers by installed capacity. The factory is equipped with:

• 2 × world-class HDPE geomembrane production lines
• 1 × advanced imported geomembrane production line
• 1 × textured HDPE geomembrane production line
• Total daily capacity: 60 metric tons
• Member of the China Technical Association of Geotextiles (CTAG)
• Over 20 registered patents in geosynthetic material manufacturing

Quality Management & Certifications

Quality assurance runs through every stage of production — from incoming raw material inspection to finished-roll performance testing. Key credentials include:

• ISO 9001:2015 — Quality Management System
• ISO 14001:2015 — Environmental Management System
• OHSAS 18001:2007 — Occupational Health & Safety
• CE Marking — European Conformity
• GRI-GM13 — Geosynthetic Research Institute standard (US)
• ASTM International — Raw material and finished product testing
• GB/T 17643-2011 and CJ/T 234-2006 — Chinese national and industry standards

Global Supply Experience

Yingfan geomembranes have been supplied to projects across Asia, Africa, the Middle East, and Latin America. The company has exhibited at major international geosynthetic and trade expos in Indonesia, Vietnam, the Philippines, Myanmar, Cambodia, Russia, and India. Export-ready packaging, ocean-freight container logistics, and multi-language technical documentation are standard capabilities.

Why Source Smooth HDPE Geomembrane from Yingfan

1. 100% Virgin Material: All HDPE geomembrane uses first-pass virgin resin — no recycled or blended content that could weaken long-term performance.
2. Verified Standards Compliance: Independent testing confirms GRI-GM13, ASTM, and ISO compliance — essential for international tender requirements.
3. Dedicated Production Capacity: 60 tons/day across four specialized lines ensures lead-time reliability for bulk orders.
4. Complete Specification Range: From 0.2 mm pond liners to 3.0 mm industrial containment, all widths up to 8 m.
5. Global Export Track Record: Proven supply to construction and environmental projects in 20+ countries.
6. Engineering Support: In-house team assists with thickness selection, installation guidance, and project-specific technical advice.