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720A 720B Polyurethane Dry Lamination Adhesive with High Peeling Strength Tunnel Prevention and FDA 175.105 Compliance for Film Foil Laminates

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720A 720B Polyurethane Dry Lamination Adhesive with High Peeling Strength Tunnel Prevention and FDA 175.105 Compliance for Film Foil Laminates

Name: 720A 720B Polyurethane Dry Lamination Adhesive with High Peeling Strength Tunnel Prevention and FDA 175105 Compliance for Film Foil Laminates
Brand: Huitian
Price: 3.0 USD

Certification : ISO 9001:2015, FDA 21 CFR 175.105

Model Number : 720A/720B

Solid Content : 72 +/- 2% / 75 +/- 2%

Pot Life : About 8 hours

Price : USD 3.0-6.0 / KG

Packaging Details : 720A: 20KG/bucket; 720B: 4KG/bucket, export-grade packaging

Mixing Ratio : 20:4 (mass ratio)

Brand Name : Huitian

Coating Weight : 2.0-3.2 g/m2 dry

Product Type : Two-component polyurethane dry lamination adhesive

Place of Origin : Shanghai, China

MOQ : 20 KG

Supply Ability : 500 MT per Month

Solvent : Ethyl acetate

Curing : 40-50C for 24 h

Packing : 720A: 20KG/bucket; 720B: 4KG/bucket

Payment Terms : T/T, L/C

Compliance : FDA 175.105

Delivery Time : 7-15 working days after payment

Viscosity : 4500 +/- 500 / 2000 +/- 1000 mPa.s

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Product Overview

Weeton 720A/720B is a two-component polyurethane adhesive for film/film and film/foil laminates delivering high peeling strength and good transparency. Its balanced rheology effectively prevents the tunnel phenomenon, ensuring a clean, uniform appearance in printed and unprinted flexible packaging.

Key Features

Effectively prevents tunnel phenomenon in lamination
High peeling strength for durable laminate bonds
Good transparency for clear film applications
High initial adhesion for immediate line stability
FDA 175.105 compliant for food contact laminates
Adjustable dilution (30-45% solid content) for process flexibility

Applications

Transparent film/film lamination for clear pouches
Film/foil laminates for barrier packaging
Printed laminates requiring precise adhesive laydown
Food packaging dry lamination lines

Typical Technical Parameters

Parameter	Specification
Composition	Two-component polyurethane (720A + 720B)
Mixing Ratio	20:4 (mass ratio)
Solid Content	72 +/- 2% (A) / 75 +/- 2% (B)
Viscosity (25C)	4500 +/- 500 mPa.s (A) / 2000 +/- 1000 mPa.s (B)
Solvent	Ethyl acetate
Coating Weight	2.0 - 3.2 g/m2 (dry)
Pot Life	About 8 hours
Curing	40-50C for 24 h
Compliance	FDA 175.105
Packing	720A: 20KG/bucket; 720B: 4KG/bucket

Directions for Use & Precautions

Dilute 720A with ethyl acetate (water below 300 ppm) before adding 720B.
Never use aromatic or alcoholic solvents for dilution.
Consume the ready-for-use adhesive within 8 hours; max 4 hours retention in the machine.
In tropical conditions use within 2 hours to avoid unstable lamination.
Add approximately 0.5-1 g/m2 more adhesive for printed films.
Follow isocyanate handling regulations and install exhaust hood on the coating unit.

FAQ

Q: How does 720A/720B prevent tunnel phenomenon?

A: Its balanced viscosity and excellent wetting behavior allow uniform adhesive laydown and smooth film lamination, effectively preventing tunnel phenomenon.

Q: Is 720A/720B transparent after curing?

A: Yes, the cured adhesive layer provides good transparency, making it suitable for clear film laminates.

Q: What solid content should I use?

A: The dilution table supports solid contents from 30% to 45% depending on the required viscosity and coating performance.

Q: Does 720 comply with food regulations?

A: Yes, 720 is in compliance with FDA 175.105.

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