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Product Overview

Multi-layer co-extruded flexible barrier films engineered for high-speed automatic horizontal and vertical form-fill-seal (VFFS/HFFS) packaging lines. Designed to maintain dimensional web stability at continuous operating speeds up to 180 cycles/min, preventing edge curling, side-tracking, and web wander on automated machinery.

Web Formats: Slit rollstock, center-folded rolls, custom-slit width coils.

Core Specifications: 3-inch (76mm) and 6-inch (152mm) high-rigidity industrial paper or heavy-duty plastic cores (engineered for drop-test and high-tension unwinding resistance).

Core Function: Extending perishable food shelf-life via tailored oxygen, moisture, and aroma barrier thresholds.

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Material Structure & Construction

Custom-engineered laminates built layer-by-layer to balance mechanical puncture resistance, converting machinability, and hermetic sealing integrity.

Print / Outer Web

BOPET (12um / 15um) or BOPA (15um) providing hot-bar heat resistance, mechanical puncture protection, and a high-surface-energy substrate for high-definition rotogravure and flexographic printing.

Barrier Core

EVOH (Ethylene Vinyl Alcohol, 4um to 9um) or METPET, engineered precisely to target specific gas permeability limits based on product respiration rates.

Sealant Web

Unoriented or co-extruded LLDPE/CPP (30um to 80um) compounded with optimized slip and anti-block masterbatch to widen the hot-tack window and lower energy consumption on sealing jaws.

Lamination System

Solvent-less polyurethane (PU) lamination systems cured under strict thermal monitoring for a minimum of 72 hours at 45°C to achieve complete chemical cross-linking and eliminate primary aromatic amine (PAA) retention.

Key Packaging Properties

Laboratory-verified performance metrics measured under controlled environmental conditions (23°C, 50% RH) following strict industrial testing protocols.

Oxygen Transmission Rate (OTR): <= 0.5 cm3/(m2 * 24h * atm) (verified for EVOH high-barrier configurations).

Water Vapor Transmission Rate (WVTR): <= 0.8 g/(m2 * 24h) (tested at 38°C, 90% RH).

Seal Initiation Temperature (SIT): 95°C to 110°C (enabling lower sealing jaw temperatures and reducing machine thermal strain).

Hot Tack Force: >= 5.0 N/15mm measured at a rapid 0.2-second dwell time.

Coefficient of Friction (COF): Kinetic COF 0.20 (+/- 0.05) against metal sealing faces to ensure frictionless film feeding through forming collars.

Applications

Configured for specialized food processing, packaging methodologies, and distribution chains:

Fresh Meat & Poultry: Modified Atmosphere Packaging (MAP) trays and vacuum skin packs utilizing anti-fog treated CPP/PE sealants to prevent moisture condensation obscuring product visibility.

Cheese & Dairy: Thermoforming high-barrier bottom webs paired with puncture-resistant, easy-peel lidding films.

Snack Foods & Confectionery: Metallized BOPP/PE composite structures delivering light barrier protection and resistance to grease and moisture ingress.

Ready-to-Eat (RTE) Meals: Retort-grade PET/Alu/CPP laminate structures engineered to withstand industrial thermal sterilization at 121°C for 40 minutes without seal channel failure or delamination.

Technical Specifications

Parameter	Test Method Category	Typical Value Range
Total Thickness	Micrometer Gauge Protocol	45um - 150um (+/- 5%)
Grammage (Basis Weight)	Area Mass Evaluation	42 g/m2 - 145 g/m2
Tensile Strength (MD/TD)	Dynamic Tensile Test	>= 120 / >= 110 MPa
Elongation at Break (MD/TD)	Dynamic Tensile Test	80% - 350%
Dart Drop Impact	Free-Fall Dart Method	>= 800g (heavy-gauge PE structures)
Puncture Resistance	Penetration Resistance Test	>= 45 N

Printing & Converting Options

Printing Capabilities

Up to 10-color central impression (CI) flexography (up to 175 lpi process printing) and 11-color rotogravure printing utilizing toluene-free, food-safe ink systems.

Inline Functional Conversions

Cold-seal adhesive patterns applied for confectionery wrappers; anti-fog inner sealant layers; laser scoring for precise, directional easy-tear performance.

Slitting Tolerances

Razor, shear, and crush slitting down to a minimum finished width of 50mm with edge trim variation tightly controlled within +/- 0.5mm.

Manufacturing & Quality Control

Extrusion Infrastructure

Advanced 7-layer and 9-layer cast and blown film extrusion lines equipped with automatic die-lip gauge profile control systems.

Inline Defect Detection

100% automated optical surface inspection systems continuously monitoring for gels, black specks, pinholes, and foreign particulate contamination down to 0.1 mm.

Batch Traceability

Every production lot is systematically tracked from raw polymer resin batch to master roll slitting, ensuring complete metallurgical and chemical data traceability.

Customization & OEM Support

Barrier Re-engineering: Custom barrier layer calculation and simulation based on target shelf-life (e.g., migrating from PVDC structures to recyclable EVOH-based alternatives).

Yield & Width Optimization: Master roll slitting mapped to your specific packaging machinery forming collar dimensions to minimize scrap waste and maximize output per linear meter.

Pilot Trial Program: Trial sample rolls provided in 200m to 500m lengths for initial machine qualification, jaw temperature profiling, and seal-window optimization prior to placing bulk manufacturing orders.

Selection Guide

Define Preservation Requirements

Determine whether the target application requires deep vacuum, MAP gas flushing, standard moisture protection, or high-temperature thermal retort.

Calculate Barrier Thresholds

Select EVOH multilayer structures if oxygen transmission must remain below 1 cm3/(m2 * day); choose standard mono-material PE or OPP laminates for moisture-only barriers.

Match Machine Parameters

Align the film's Seal Initiation Temperature (SIT) and hot-tack window with your packaging machine's current sealing jaw temperature, pressure, and cycle speed.

Evaluate Mechanical Demands

Specify higher dart-drop impact and puncture resistance thresholds if packaging heavy, dense, or sharp-edged food products (e.g., frozen blocks or bone-in meats).

FAQ

Q: What is the minimum order quantity (MOQ) for custom-printed rollstock film?

A: The standard MOQ is 1,000 kg per SKU/width or a minimum run length of 5,000 meters per print cylinder setup, depending on the film gauge, material structure, and total width.

Q: How do you prevent tunneling or web wandering during high-speed VFFS runs?

A: Thickness gauge variations are maintained strictly under +/- 5% across the web width using automated extrusion die profiling, combined with optimized center-surface winding tension profiles to eliminate internal roll stress and telescoping.

Q: Are these barrier films compatible with automated metal detectors and checkweighers?

A: Yes. Non-metallized structures (such as PET/PE or BOPP/PE) are transparent to metal detectors. For metallized structures, electrical surface resistivity is maintained within safe operational thresholds to prevent false rejects on industrial metal detection arches.

Q: What quality documentation is provided with commercial shipments?

A: Every commercial shipment is accompanied by a batch-specific Certificate of Analysis (CoA) recording actual tested values for thickness, tensile strength, and COF. Total migration test summaries and raw material food-contact statements are available upon request under NDA.

Q: Can these films withstand deep-freezing down to -40°C without embrittlement?

A: Yes. Formulations incorporating metallocene LLDPE or specialized BOPA sealant layers retain impact strength and resist low-temperature flex-crack failure under blast-freezing environments down to -40°C.

Q: What are the standard lead times for trial samples versus bulk container orders?

A: Standard lab samples and pre-slit test rolls ship within 5 to 7 business days. Full container load (FCL) production runs typically require 15 to 25 calendar days following artwork approval and technical specification sign-off.

As one of the leading food packaging film series manufacturers and suppliers in China, we also support customized service. Welcome to wholesale high quality food packaging film series at competitive price from our factory. If you have any enquiry about quotation, please feel free to email us.

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