BP-320: Two-Pieces 2-in-1 Paperboard Aluminum Foil Induction Seal Liner

Structure: Paperboard + Aluminum Foil + Heat Seal Layer | Model: BP-320

The BP-320 is a premium two-piece induction seal liner designed for tamper-evident packaging and superior product protection. This 2-in-1 construction combines a paperboard backing with an aluminum foil sealing layer, creating a reliable hermetic seal that extends shelf life, prevents leaks, and provides clear tamper evidence.

During induction sealing, the aluminum foil layer generates heat through electromagnetic induction, bonding securely to the container mouth. The paperboard backing separates and remains inside the cap, serving as a resealable liner for repeated use after opening. This design is widely adopted in pharmaceutical, food, cosmetic, and chemical industries for its balance of security and consumer convenience.

Inquire Now Next Product

Key Features immediately

● Tamper-Evident – Clear visual indication if the seal has been broken

● Two-Piece Design – Paperboard stays in cap for reseal after foil is removed

● Hermetic Seal – Prevents leakage, moisture ingress, and oxygen transmission

● Clean Peel Option – No residue left on container mouth

● Custom Printable – Aluminum foil surface accepts logos and branding

● Extended Shelf Life – Protects product freshness and integrity

How Two-Piece Induction Sealing Works

The induction sealing process is a non-contact heating method that bonds the foil liner to the container:

1. Insertion – The liner is placed inside the bottle cap (foil side facing the container opening)

2. Capping – Cap is applied to the container with proper torque

3. Induction – Container passes through an electromagnetic field, heating the aluminum foil

4.Sealing – Heat activates the seal layer, bonding foil to the container rim

5. Separation – Paperboard backing releases from the foil and stays in the cap

6. Result – Foil seals the container; paperboard becomes a resealable liner

Key sealing parameters:

Parameter	Requirement
Pressure	Controlled by capping equipment torque
Heat	Generated by induction field (liner-specific)
Time	Determined by conveyor speed

Technical Specifications

Basic Parameters

Parameter	Specification	Notes
Model	BP-320	–
Type	Two-piece induction seal liner	Paperboard backing + foil seal
Total Thickness	0.6mm – 1.0mm (standard)	Customizable upon request
Diameter Range	10mm – 150mm	Custom sizes available
Structure Layers	Paperboard / Aluminum Foil / Heat Seal Film	2-in-1 construction
Paperboard Color	White / Natural / Custom printed	–
Shape	Round disc (die-cut)	Custom shapes available for non-round caps

Layer Structure Diagram

Paperboard Layer (0.5mm/0.9mm thickness)	← Stays in cap for reseal, printable surface
Wax Release Layer	← Allows clean separation during induction
Aluminum Foil Layer (20µm thickness)	← Generates heat via induction, provides barrier
Heat Seal Coating	← Bonds to container mouth (resin-specific)

Performance Characteristics

Property	Description	Benefit
Moisture Barrier	Excellent	Prevents product degradation from humidity
Oxygen Barrier	Excellent	Extends shelf life of oxygen-sensitive products
Chemical Resistance	Good	Suitable for oils, alcohols, and mild chemicals
Light Protection	Moderate (foil blocks light)	Protects light-sensitive products
Tamper Evidence	Clear visual indication	Consumer safety and brand protection

Available Sealing Performance Options

BP-320 can be customized for different peel characteristics:

Seal Type	Description	Best For
Clean Peel	Foil removes cleanly with no residue left on container mouth	Pharmaceuticals, premium foods, where clean opening is essential
Welded Seal	Foil bonds more aggressively; some residue may remain	Industrial chemicals, products requiring maximum leak protection

Compatible Containers

The BP-320T induction liner is compatible with a wide range of container materials:

Container Material	Compatibility	Heat Seal Layer Required
HDPE(High-Density Polyethylene)	✓ Excellent	PE-based seal layer
LDPE(Low-Density Polyethylene)	✓ Excellent	PE-based seal layer
PP(Polypropylene)	✓ Excellent	PP-based seal layer
PET(Polyester)	✓ Excellent	PET-based seal layer
PVC(Polyvinyl Chloride)	✓ Good	Universal seal layer
PS(Polystyrene)	✓ Good	Universal seal layer
Glass	✓ Excellent	Universal seal layer
Metal	✗ Not recommended	Induction sealing not effective on metal containers

⚠️ Important: For optimal seal performance, resin-specific heat seal layers (matching your container material) outperform universal layers.

Key Applications

● Pharmaceutical Industry

OTC drugs (aspirin, ibuprofen, vitamins)

Prescription medications

Nutraceuticals and supplements

*Why BP-320*: Tamper-evident sealing is regulatory required; resealable paperboard backing allows patients to reseal the bottle.

● Food & Beverage

Spices and seasonings

Coffee and tea

Powdered supplements

Sauces and condiments

Single-serve packages

*Why BP-320*: Preserves freshness, prevents moisture ingress, extends shelf life.

● Cosmetics & Personal Care

Creams and lotions

Serums and oils

Shampoos and conditioners

Aerosol over-caps

*Why BP-320*: Clean peel prevents messy residue on container mouths.

● Industrial & Chemical

Lubricants and oils

Adhesives

Cleaning chemicals

Agricultural products (pesticides, fertilizers)

*Why BP-320*: Chemical resistance and leak-proof sealing for hazardous materials.

● Alcohol & Beverage

Spirits and liquors

Edible oils

*Why BP-320*: Anti-counterfeiting and tamper evidence for premium products.

Customization Options

Customization Item	Available Options
Diameter	10mm – 150mm (in 0.1mm increments)
Total Thickness	0.6mm / 1.0mm (others available)
Heat Seal Layer	PE / PP / PET / Universal
Peel Type	Clean peel / Welded seal
Printing	Logo or branding on foil side
Shape	Round / Oval / Rectangular / Custom die-cut
Quantity Packaging	Roll form (continuous) / Cut pieces (boxed)

Quality Certifications

Certification	Status	Applicability
ISO 9001:2008	✓ Certified	Quality management systems
FDA Compliant	✓ Yes	Food and pharmaceutical contact
SGS Verified	✓ Available	Third-party testing available
RoHS Compliant	✓ Yes	Restricted substances compliance
REACH Compliant	✓ Yes	EU chemical regulations

Packaging & Storage

Item	Specification
Packaging Form	Cut pieces in plastic bags / Roll form (continuous on 76mm core)
Standard Pack Quantity	1,000 – 5,000 pieces per bag (depending on diameter)
Carton Packaging	Corrugated cartons with inner liner
Storage Conditions	Cool, dry place; avoid direct sunlight and extreme heat
Shelf Life	2 years under proper storage conditions

Why Choose Our BP-320?

Advantage	Benefit
Factory Direct Pricing	No middlemen; competitive pricing
11+ Years Export Experience	Proven quality and reliability
Full Quality Control	IQC/QC/OQC processes for every batch
Sample Testing Available	Test before mass production commitment
Custom Orders Welcome	Low MOQ for new customers
Fast Lead Times	Sample: 3-5 days; Bulk: 15-20 days
Free Technical Support	Guidance on seal selection and induction parameters

Quick Reference Specification Sheet

Parameter	BP-320 Specification
Product Name	Two-pieces 2-in-1 Paperboard Aluminum Foil Induction Seal Liner
Type	Two-piece induction liner
Structure	Paperboard + Aluminum Foil + Heat Seal Layer
Standard Thickness	0.6mm – 1.0mm
Diameter Range	10mm – 150mm
Compatible Containers	HDPE, LDPE, PP, PET, PVC, PS, Glass
Available Seal Types	Clean peel / Welded seal
Custom Printing	Yes (foil side)
Pull-Tab Option	Yes
Certifications	ISO, FDA compliant, RoHS, REACH
MOQ	Negotiable (sample orders welcome)

Frequently Asked Questions (FAQ)

Q1: What is the difference between one-piece and two-piece induction liners?

A: One-piece liners transfer fully to the container mouth with no backing left in the cap. Two-piece liners (like BP-320) have a paperboard backing that separates and stays in the cap, allowing the consumer to reseal the container after opening.

Q2: How do I choose the right heat seal layer for my container?

A: Match the heat seal layer to your container material:

PE container → PE seal layer

PP container → PP seal layer

PET container → PET seal layer

Glass → Universal seal layer

Q3: Will the liner leave residue on my container mouth?

A: It depends on the seal type you select. Clean peel liners leave no residue; welded seal liners may leave some residue. Specify your preference when ordering.

Q4: Can you print my logo on the paperboard?

A: Yes. The foil side can be printed with your logo, brand name, or other information for brand identification.

Q5: What is the minimum order quantity (MOQ)?

A: MOQ is negotiable. We welcome sample orders for testing and validation before mass production.

Q6: Does this liner work with glass bottles?

A: Yes. BP-320 is compatible with glass containers when using the appropriate universal heat seal layer.

Q7: What induction sealing parameters are required?

A: Proper sealing depends on three factors: Pressure (cap torque), Heat (induction power setting), and Time (conveyor speed). We provide technical support to help you optimize your sealing process.

Disclaimer: Technical specifications are typical values and may vary based on custom requirements. Customers should conduct application testing before mass production to verify compatibility and performance.

Contact us today for samples and quotations!

Looking for the Right Sealing Liner for Your Packaging?

Tell us your bottle material, contents, and sealing requirements — our engineers will recommend the best solution.

Explore More