Expert Guide: Choosing and Applying LDPE, HDPE, and LLDPE PE Bags

As a leading enterprise with over 20 years of expertise in the plastic packaging industry, Hangzhou Hengyi Packaging Materials Co., Ltd. is committed to providing high-performance, customized PE bag solutions. Addressing common market confusion about selecting LDPE, HDPE, and LLDPE materials, we leverage industry standards and production experience to analyze their core differences and application scenarios, helping you make precise choices.

1. Core Properties and Distinctions of Three PE Materials

HDPE (High-Density Polyethylene)

Properties: Density of 0.940–0.976g/cm³, high crystallinity, excellent chemical resistance (against strong acids and oxidants), superior mechanical strength, and outstanding moisture resistance

Applications: Suitable for heavy-duty packaging (e.g., chemical raw material bags, detergent bottles), industrial membranes (seepage-proof membranes), shopping bags, and high-load-bearing scenarios

Identification: Processing temperature around 180℃; burns with a blue flame at the bottom, melts and drips, emitting a paraffin-like odor

LDPE (Low-Density Polyethylene)

Properties: Density of 0.910–0.940g/cm³, soft, transparent, excellent cold resistance (tolerates -70℃), good heat-sealing performance, but weaker mechanical strength and heat resistance

Applications: Food preservative films, flexible packaging lids, cable insulation, and low-temperature packaging

Identification: Soft to the touch; burns with a yellow-blue flame and easily forms filaments when burning

LLDPE (Linear Low-Density Polyethylene)

Properties: Density of 0.915–0.935g/cm³, combining high toughness, tear resistance, and environmental stress crack resistance, with excellent heat-sealing performance410.

Applications: Stretch wrap films, frozen food bags, garbage bags, and high-impact resistance packaging

Identification: Swells when in contact with benzene and becomes brittle with hydrochloric acid

2. How to Select PE Materials Based on Needs

Match by Functional Requirements

High Strength & Impermeability: Prioritize HDPE for chemical packaging and construction seepage-proof membranes

Softness & Transparency: Choose LDPE for food preservation and soft packaging of daily chemical products

Tear Resistance & Toughness: Opt for LLDPE in heavy-duty bags and agricultural films

Adapt to Environmental Conditions

Chemical Resistance: HDPE offers the best resistance to strong acids and solvents1.

Low-Temperature Environments: LDPE's excellent cold resistance makes it ideal for cold chain packaging

Complex Stress Environments: LLDPE excels in environmental stress crack resistance

Consider Cost & Sustainability

Economy: LDPE has lower processing costs, suitable for large-scale lightweight packaging

Sustainability: HDPE and LLDPE are 100% recyclable. Hengyi provides GRS-certified recycled PE bags to support your ESG goals

3. Hengyi Packaging's Core Advantages

Full-Category Customization Capability

Material Coverage: Offers HDPE, LDPE, LLDPE, and composite materials (e.g., PA/PE) with precise thickness options from 0.015–0.5mm

Function Expansion: One-stop solutions for special needs such as anti-static (ESD), degradable (ASTM D6400), and high-barrier (EVOH layer) packaging

Medical-Grade Quality Control System

Production: Manufactures food/medical-grade PE bags in Class 100,000 cleanrooms with a defect rate as low as 0.02% (national standard: 0.5%)

Quality Inspection: Three-layer inspection process (raw material screening, in-process sampling, final full inspection), supporting SGS/FDA certifications

Agile Service Network

Rapid Response: 72-hour sample delivery, 7–15-day mass production, and 48-hour emergency order processing

Global Delivery: Seamless cross-border support via logistics networks at Ningbo/Shanghai ports, serving e-commerce and industrial exports

4. Customer Cases & Industry Recognition

Zhejiang Pump Manufacturer: Switched to Hengyi's customized HDPE anti-rust bags, replacing traditional wooden packaging and saving 280,000 RMB annually in logistics costs

EU Fresh Produce Supplier: Hengyi's LLDPE degradable cling film met EN 13432 certification, aiding the client's carbon reduction goals

Empower Packaging Value with Hengyi

Hangzhou Hengyi Packaging Materials Co., Ltd. drives innovation and customer focus to deliver cost-effective, reliable PE bag solutions worldwide. Whether you seek extreme performance or environmental compliance, we ensure precise needs-matching.

Contact Us Today:+86 13456733297 | sale: adam_packaging@163.com

Let every PE bag embody quality and responsibility.