Food-grade cling film (Cling Film / Food Wrap) and industrial stretch film (Stretch Film / Pallet Wrap) may look similar – both are transparent plastic films – but they differ fundamentally in material composition, safety standards, performance requirements, and application scenarios. The detailed comparison is provided below.
1. Core Differences Overview
| Aspect | Food-Grade Cling Film | Industrial Stretch Film |
|---|---|---|
| Primary Use | Food preservation, direct food contact packaging | Pallet load wrapping, transport securing, industrial/warehouse packaging |
| Safety Level | Food-grade, safe for direct food contact | Industrial-grade, strictly prohibited from direct food contact |
| Core Materials | PE (Polyethylene), PVDC, compliant PVC | LLDPE (Linear Low-Density Polyethylene), PVC |
| Typical Thickness | 8 – 20 µ (thinner) | 15 – 30 µ (thicker) |
| Stretch Ratio | Approximately 100%–300% | Up to 200%–500% |
| Cling Method | Electrostatic adhesion or food-grade cling agents | PIB tackifiers or electrostatic treatment |
| Regulatory Certification | FDA (US), EU 10/2011 (EU), GB 4806.7 (China) | Industrial product standards (e.g., GB/T 19785), no food contact certification |
| Environmental Features | Compostable, bio-based, mono-material recyclable options | Lightweighting, recyclable design, some with UV inhibitors |
2. Safety Standard Differences – The Most Fundamental Distinction
2.1 Food-Grade Cling Film
Food-grade cling film must comply with strict food safety national standards:
Must use food-grade raw materials: PE, PVDC, or PVC that meets food contact requirements; additives must comply with national standards
Hazardous substances banned: PVC cling film prohibits DEHA and other harmful plasticizers; heavy metal migration is strictly limited
Must pass migration testing: Ensures no harmful substances transfer into food
Production environment requirements: Must be manufactured in a clean environment, with hygiene permits and third-party testing
Labeling requirements: Must state "Food Contact" wording, standard number, manufacturer information, etc.
2.2 Industrial Stretch Film
Industrial stretch film complies with industrial product standards and does not require food contact safety:
May use industrial-grade additives: Such as fillers, antioxidants, UV stabilizers; some may use recycled materials
No food migration testing required: Not required to pass food contact material safety certifications
No food hygiene requirements: Production environment does not need to meet food-grade cleanliness standards
Labeling differences: Typically marked with "Industrial Use" or "Do Not Contact Food" warnings
Important Warning: Industrial stretch film must never be used to directly wrap food. Industrial stretch film may contain industrial-grade additives, tackifiers (PIB), UV stabilizers, and other substances that could migrate into food, posing potential health risks with long-term consumption.
3. Material & Performance Differences
3.1 Material Comparison
| Material | Food-Grade Cling Film | Industrial Stretch Film |
|---|---|---|
| PE/LDPE/LLDPE | Most common, safe and non-toxic, microwaveable (specific types) | Main base material, focuses on stretch and strength |
| PVC | Limited use, plasticizers strictly restricted | Common in early products, gradually being replaced by PE |
| PVDC | High barrier, suitable for meat packaging | Not used for stretch film |
| LLDPE (C6/C8/MPE) | Rarely used | Mainstream material, excellent stretch performance |
| Recycled Material/PCR | Recycled material prohibited in food contact layer | Some products may use, but must not contact food |
3.2 Thickness Comparison
| Type | Typical Thickness | Notes |
|---|---|---|
| Food-Grade Cling Film | 8 – 20 µ | Thinner, soft, easy to conform to food and containers |
| Industrial Stretch Film | 15 – 30 µ (heavy-duty up to 120 µ) | Thicker, tough, high puncture resistance |
Thickness unit note: 1 µ = 0.001 mm. Industrial stretch film is typically 15-30 µ, while food-grade cling film is typically 8-12 µ.
3.3 Stretch Performance Comparison
| Performance Parameter | Food-Grade Cling Film | Industrial Stretch Film |
|---|---|---|
| Stretch Ratio | Approximately 100%–300% | Up to 200%–500% |
| Puncture Resistance | Fair | High (must resist sharp edges of goods) |
| Tear Strength (Transverse) | Fair | High (prevents breakage during pre-stretch) |
| Holding Force | No specific requirement | Important parameter for load securing |
3.4 Cling Comparison
| Characteristic | Food-Grade Cling Film | Industrial Stretch Film |
|---|---|---|
| Cling Source | Electrostatic adhesion or food-grade cling agents | PIB (Polyisobutylene) masterbatch or VLDPE blending |
| Cling Characteristics | Mild, minimal residue | Strong self-cling, firm layer-to-layer adhesion |
| Temperature Sensitivity | Relatively stable | Significant impact (cling decreases at low temperatures) |
| Migration Time | Not required | Approximately 3 days for PIB to migrate to surface |
4. Application Scenarios Comparison
4.1 Food-Grade Cling Film Applications
| Scenario | Specific Use | Key Requirements |
|---|---|---|
| Home Kitchens | Leftover preservation, fruit/vegetable wrapping, food storage | Easy tear, safety, microwave options |
| Supermarket Deli/Fresh Food Sections | Packaging meat, cheese, sliced deli items, produce | High clarity, anti-fog, FDA certification |
| Restaurants/Food Service Kitchens | Covering prep bowls, pre-portioned ingredients, cold storage | Easy cutting, self-cling, cost-effective |
| Food Processing Plants | Tray sealing, automated packaging lines | Machine compatibility, consistent roll specifications |
| Cold Chain Logistics (Food) | Food-grade cargo protection | Low temperature resistance, food safety certification |
4.2 Industrial Stretch Film Applications
| Scenario | Specific Use | Key Requirements |
|---|---|---|
| Pallet Wrapping | Full pallet load unitizing, transport securing | High stretch ratio, puncture resistance, holding force |
| Warehouse Stacking | Vertical storage load unitizing, collapse prevention | Holding force, tear resistance |
| Logistics & Transport | Cargo protection during long-distance shipping | Weather resistance, UV stabilization (for outdoor use) |
| Hardware/Building Materials/Chemicals | Wrapping pipes, sheets, drummed goods | High strength, puncture resistance |
| Export Packaging | Load securing inside containers | Moisture resistance, dust protection, load stability |
| Agriculture | Silage film coverage, etc. | Weather resistance, large dimensions |
5. Regulatory & Certification Requirements
5.1 Food-Grade Cling Film Certification Requirements
| Market | Certification Standard |
|---|---|
| United States | FDA 21 CFR (177.1520/177.1970, etc.) + migration testing |
| European Union | EU 10/2011 + EC 1935/2004 + migration test report |
| Germany | LFGB certification (additional §30/31 requirements) |
| China | GB 4806.7 "Plastic Materials and Articles for Food Contact" + GB/T 10457 |
| Japan | Food Sanitation Act |
5.2 Industrial Stretch Film Applicable Standards
| Standard Type | Description |
|---|---|
| GB/T 19785 | Chinese national standard for stretch wrap (primarily physical properties) |
| ASTM D5458 | US standard for stretch film cling testing |
| ASTM D882 | Standard for tensile strength and elongation testing |
| Enterprise Standards | Most manufacturers follow proprietary standards; no food certification required |
6. How to Quickly Distinguish Between Them?
| Method | Food-Grade Cling Film | Industrial Stretch Film |
|---|---|---|
| Check labeling | Marked "Food Contact", QS/SC certification, standard number (e.g., GB 4806.7) | Marked "Industrial Use", "Do Not Contact Food", or no food-related labeling |
| Feel texture | Soft, thin, easy to tear | Tough, thicker, difficult to tear |
| Observe use | Used in kitchens, supermarkets, food service | Used in warehouses, logistics, factories |
| Test stretch | Becomes significantly thinner when stretched, low rebound | Can stretch significantly, strong holding force |
| Check price | Relatively higher (food-grade raw materials) | Relatively lower (industrial-grade raw materials, large rolls) |
| Smell | Odorless or slight raw material smell | Some products have noticeable PIB additive odor |
7. FAQ
Q1: Can industrial stretch film be used temporarily to wrap food?
A: Absolutely not. Industrial stretch film contains industrial-grade additives, tackifiers (PIB), UV stabilizers, and other substances that have not been evaluated for food contact safety. Direct contact with food may cause harmful substance migration, posing health risks with long-term consumption.
Q2: Why can't industrial stretch film replace cling film?
A: There are three reasons:
Safety: Industrial film is not food-grade and may contain prohibited plasticizers or industrial additives
Performance: Industrial film is too thick and too tacky for food packaging operations
Cost: Industrial film is produced to industrial standards in large rolls unsuitable for home use, and the actual unit cost may not be lower
Q3: Can PE-based stretch film be used to wrap food?
A: No. Even if the stretch film is made of PE, unless it is explicitly labeled "Food Grade" or "Food Contact", it cannot be used for food packaging. Industrial-grade PE stretch film may contain recycled materials, industrial-grade additives, or be manufactured in non-clean environments.
Q4: How can I tell if the cling film at home is food-grade?
A: Check the product packaging:
Should state "Food Contact"
Should have a standard number (e.g., GB/T 10457)
Should have manufacturer information and QS/SC certification mark
If none of this information is present, the "cling film" may be industrial film – do not use it
Q5: Can industrial stretch film and food-grade cling film share the same cutter?
A: Not recommended. Cutters can retain film debris and additives. Cross-contamination could transfer industrial film residue onto food-grade film. Use dedicated cutting equipment for each type.
8. Summary Comparison Table
| Aspect | Food-Grade Cling Film | Industrial Stretch Film |
|---|---|---|
| Primary Use | Food preservation, direct food contact | Load securing, transport protection |
| Safety Level | Food-grade (FDA/EU/GB certified) | Industrial-grade (strictly prohibited from food contact) |
| Typical Thickness | 8–20 µ | 15–30 µ (heavier gauges available) |
| Stretch Ratio | 100%–300% | 200%–500% |
| Cling Source | Electrostatic / food-grade cling agents | PIB tackifiers / electrostatic treatment |
| Core Performance | Clarity, anti-fog, controlled oxygen permeability | Puncture resistance, holding force, tear strength |
| Primary Materials | PE, PVDC, compliant PVC | LLDPE, PVC |
| Certification Required | Mandatory food contact material certification | Industrial physical property standards |
| Typical Applications | Kitchens, supermarkets, food service, food processing | Logistics, warehousing, manufacturing, agriculture |
| Can Contact Food? | Yes | Strictly prohibited |
| Environmental Options | Compostable, bio-based, mono-material recyclable | Lightweighting, recyclable, UV stabilized |
Food-grade cling film is a safety-certified packaging product designed specifically for direct food contact. Industrial stretch film is an industrial packaging material designed specifically for cargo transport and warehousing. The two are completely different and must not be mixed. Using industrial stretch film for food packaging presents serious food safety risks. Conversely, cling film cannot meet the strength and stretch ratio requirements of industrial packaging.
