TML Packaging Co., Ltd. is one of the most reliable manufacturers and suppliers of heat-seal lidding in China. If you're going to wholesale bulk heat-seal lidding made in China, welcome to get quotation and free sample from our factory. All customized products are with high quality and low price.
Product Overview
Custom Heat-Seal Lidding provides hermetic cover sealing for rigid packaging, engineered with functional polymer layers that match container resins to achieve controlled seal strength and moisture barrier performance across fast automated filling lines.
Key Product Specifications
|
Specification |
Standard Options |
Technical Values |
|
Base Materials |
Aluminium Foil, PET, Paper, BOPA |
Foil: 30–45 μm / Total: 35–120 μm |
|
Laminate Structures |
Alu/HSL, Alu/PET, Alu/Paper, PET/PE, PET/CPP |
Customized multi-layer options |
|
Sealing Substrates |
PP, PS, PET, PE, HDPE, PVC |
Matches targeted rim resin |
|
Sealing Temperature |
160°C – 250°C |
Adjustable by line dwell time |
|
Seal Mechanics |
Easy-Peel, Burst-Resistant, Permanent Weld |
Customized opening force |
|
Surface Finishes |
Glossy, Matte, Embossed, Lacquered |
Dot/Wormhole embossing formats |
|
Supply Formats |
Rollstock, Slitted Rolls, Die-Cut Lids |
Custom rim profiles & pull tabs |
|
Barrier Level |
Oxygen, Moisture, Light, Aroma Protection |
OTR & WVTR compliant standards |
|
Production Cycle |
Sample: 5–7 days / Mass: 20–25 days |
Order volume based schedules |
Material Structure Selection
Blocks moisture, oxygen, UV light, and aromas to preserve shelf-life for sensitive products.
Provides high mechanical strength and puncture resistance for light-weight structural configurations.
Integrates printable natural fibers with internal barrier films for stable structural balance.
Offers clean peel performance without surface fiber tear during opening.
Container Material Matching
Polypropylene Containers: Formulated heat-seal layers bond tightly to support retorting and hot-fill processing.
Polyethylene & HDPE Substrates: Low-density sealing coatings create air-tight bonds at lowered thermal initiation points.
Polyester Trays & Cups: Specialized copolymer lacquers secure clear seals onto rigid polyester container surfaces.
Polystyrene & PVC Packaging: Targeted resin interfaces ensure leak-proof seals for single-serve cups and medical packaging.
Thermal Sealing Mechanics
Sealing Temperature Initiation:
Works within 160°C to 250°C parameters to suit varying machine operational speeds.
Hot-Tack Performance:
Holds immediate bond strength right after heat-jaw release to maintain uninterrupted line movement.
Peel Behavior Control:
Delivers smooth 45-degree hand opening without film layer separation or shredded edges.
Permanent Weld Sealing:
Creates strong structural bonds where container wall failure occurs before seal breakage.
Barrier Performance Options
Moisture Transmission Barrier: Blocks ambient water vapor penetration to protect dry contents from clumping.
Oxygen Transmission Control: Prevents oxygen ingress to retard oxidation in fresh and gas-flushed packaging.
Light Blockade Properties: Completely stops light exposure to prevent flavor degradation in light-sensitive formulations.
Format & Processing Options
Surface Embossing: Imprints texture patterns to assist mechanical vacuum pickup on automated cup-lidding stations.
Custom Graphic Printing: Supports multi-color surface printing coated with clear chemical-resistant protective lacquers.
Continuous Rollstock: Supplied in exact slitted widths for inline form-fill-seal equipment.
Pre-Cut Die-Cut Lids: Stamped into precise circle or rectangular geometric profiles featuring accessible pull tabs.
Typical Packaging Applications
Dairy & Cold Foods: Seals yogurt cups, butter tubs, sour cream portions, and cheese trays.
Prepared Meals & Sauces: Secures tray meals, dip cups, and hot-fill sauces.
Beverage Packaging: Covers juice cups, water bottles, and liquid unit-dose containers.
Pharmaceutical Packaging: Protects unit-dose tray configurations requiring strict sterile seal integrity.
Quality Testing Standards
Flange Leakage Testing:
Verifies hermetic seal integrity around the entire container rim perimeter.
Peel Force Measurement:
Quantifies target seal strength on calibrated force instruments under set pull speeds.
Permeability Analysis:
Measures water vapor and oxygen transmission rates to confirm shelf-life expectations.
Dimensional Inspection:
Checks core sizes, roll widths, thickness consistency, and die-cut rim shapes.
Customization Workflow
Substrate Analysis: Testing physical container rim samples to pick matching heat-seal resin lacquers.
Structure Engineering: Defining barrier requirements, foil gauges, and seal temperature limits.
Sample Validation: Creating test rolls or die-cut pieces for factory equipment trial runs.
Batch Manufacturing: Slitting and converting final laminates under controlled tension settings.
RFQ Checklist
Container Profile:
Detail rim material, rim width, opening dimensions, and container design drawings.
Processing Conditions:
Specify filling method, hot-fill temperatures, gas-flushing, and shelf-life targets.
Equipment Specifications:
State sealing jaw type, temperature range, speed settings, and feed style.
Commercial Inputs:
Include total batch quantity, delivery timing, printing design files, and format choices.
FAQ
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