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Polyurethane Dispersion for PET film Primer With Excellent Adhesion on UV ink and Metalization

Polyurethane Dispersion for PET film Primer With Excellent Adhesion on UV ink and Metalization

This Polyurethane Dispersion for PET Film Primer with Excellent Adhesion on UV Ink and Metalization represents a high-performance aqueous solution designed specifically for enhancing surface compatibility and bonding on polyester substrates. The advanced polymer design of this Polyurethane Dispersion incorporates tailored functional groups that promote strong interfacial adhesion to PET films, while maintaining outstanding flexibility and coating integrity. It ensures superior interlayer adhesion when applied under UV-curable inks and metallized layers, effectively preventing delamination and ensuring long-term durability under mechanical and environmental stress. This Polyurethane Dispersion is formulated with low VOC content in compliance with international environmental standards, making it an ideal priming solution for high-end packaging, decorative films, and functional laminates where reliable adhesion, visual quality, and sustainable production are essential.

  • Item No :

    Polyurethane Dispersion PUD
  • Application :

    Suitable for PET film Primer and UV ink, Metalization
  • Special Feature :

    Excellent adhesion,flexibility,superior interlayer adhesion
  • Description

Product Overview

This Polyurethane Dispersion for PET Film Primer with Excellent Adhesion on UV Ink and Metalization is a high-performance, water-based polymer system specifically engineered to address the critical adhesion challenges in advanced film coating and printing applications. Its formulation is based on a molecularly modified polyurethane chemistry, which provides an optimal balance of flexible polymer chains and robust functional groups designed to aggressively anchor onto polyester (PET) surfaces. The defining characteristic of this Polyurethane Dispersion is its exceptional ability to form a uniform, continuous primer film that establishes superior intercoat adhesion, not only to the PET substrate but also to subsequent layers of UV-curable inks and metallized coatings, thereby preventing delamination and ensuring long-term durability. This versatile Polyurethane Dispersion delivers a unique combination of high flexibility (approximating a Tg of -40°C), excellent stability, and reliable performance under processing conditions, making it an indispensable solution for demanding applications in high-end flexible packaging, decorative and functional laminates, and premium label films where outstanding adhesion, optical clarity, and sustainable, low-VOC compliance are paramount.

 
Polyurethane Dispersion 

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Key Features

  • Superior Adhesion to PET and Intercoat Layers – This  Water based Polyurethane Dispersion is molecularly engineered with specific functional groups that promote strong covalent and polar interactions with polyester (PET) films. It creates a reliable priming layer that exhibits excellent adhesion not only to the substrate but also to subsequent UV-curable ink and metallization layers, effectively preventing interlayer delamination.
  • High Flexibility and Low-Temperature Performance – With a designed glass transition temperature (Tg) of approximately -40°C, this dispersion forms films with exceptional flexibility and elastic recovery. This ensures the coated film can withstand post-processing operations like cutting, scoring, and folding without cracking, maintaining integrity under mechanical stress.
  • Excellent Stability and Formulation Latitude – The colloidal system of this Polyurethane Dispersion demonstrates good mechanical and storage stability within a defined pH range (4.5-6.5). It offers formulators compatibility with various additives, although mixing with other emulsions requires prior stability verification to ensure robust performance.
  • Water-Based and Eco-Compliant Platform – As a true water-borne Polyurethane Dispersion, it is formulated with minimal volatile organic compound (VOC) content, aligning with stringent international environmental regulations. This makes it a sustainable choice for coating applications requiring both high performance and environmental responsibility.
  • Rapid Film Formation and Good Handling Properties – Characterized by a moderate viscosity (<500 mPa·s at 25°C) and a solids content of 30±1%, this dispersion facilitates easy application, leveling, and rapid film formation through efficient coalescence, resulting in a uniform, transparent primer layer suitable for high-speed coating processes.
Parameter Typical Value Unit Notes
Viscosity (25°C, Brookfield RV) < 500 mPa·s Spindle 3, 20 rpm
Soild Content  30±1 % /
pH Value 4.5-6.5 /
Shelf Life 12 months Stored in sealed containers at 5–35°C
Storage Cool, dry place Avoid direct sunlight and moisture

 

Parameter Typical Value
Apprearance Milky white
Modulus(Mpa) 4.5-6
Elongation% ≥450
Tensile Srtrength(Mpa) ≥35
Tg ()
~40℃

 

Applications

 

This Polyurethane Dispersion PUD for PET Film Primer with Excellent Adhesion on UV Ink and Metalization enables the development of reliable and high-performance coating systems specifically for polyester film-based applications, leveraging its core strengths of outstanding PET adhesion, superior interlayer bonding, and inherent flexibility.

 

Primer for UV-Printed PET Packaging Films – This Polyurethane Dispersion is ideally suited as a primer layer on PET films used in high-quality packaging. It provides an essential foundation that ensures robust adhesion for subsequent UV-cured ink layers, preventing delamination during printing, conversion, and end-use, thereby guaranteeing graphic integrity and durability.

 

Primer for Metallized PET Films – For PET films requiring a vacuum metallized layer for decorative or functional purposes (e.g., reflective, barrier), this Polyurethane Dispersion serves as a critical primer. It promotes strong adhesion between the PET substrate and the metal layer, preventing peel-off and ensuring the longevity of the metallic finish.

 

Primer for Combined UV Printing and Metallization on PET – In applications where PET films undergo both UV printing and metallization, this primer-grade dispersion provides a unified adhesive platform. It ensures excellent intercoat adhesion for both the UV ink and the subsequent metal layer, making it essential for complex, multi-step finishing processes on films for labels, decorative foils, and specialty packaging.

 

Benefits

Key Traits:
Excellent adhesion to PET and intercoat layers; high flexibility (Tg ~ -40°C); stable, water-based formulation.

 

Primary Benefits:

Ensures Superior Coating System Integrity – This Polyurethane Dispersion is engineered to provide excellent adhesion to PET substrates and, critically, superior interlayer adhesion to subsequent UV inks and metallization. This prevents delamination, ensuring the long-term durability and reliability of the final multi-layer coated film in demanding applications.

Provides High Flexibility and Processing Resilience – With its designed low glass transition temperature (Tg ~ -40°C), this Polyurethane Dispersion forms a highly flexible primer film. This flexibility allows the coated PET film to withstand post-processing operations such as cutting, folding, and embossing without cracking or compromising the adhesive bonds to the layers above.

Offers a Stable and User-Friendly Aqueous Platform – As a water-based Polyurethane Dispersion with a defined viscosity (<500 mPa·s) and solids content (30±1%), it provides a stable, easy-to-handle formulation that facilitates application. Its eco-compliant, low-VOC nature aligns with sustainable manufacturing goals while delivering consistent performance.

Delivers Reliable Performance with Formulation Clarity – This Polyurethane Dispersion offers predictable behavior within specified parameters (e.g., pH 4.5-6.5). Its performance profile is well-defined, providing formulators with a reliable base for creating primer systems, though mixing with other emulsions requires prior verification to ensure stability.

 

 

 

 

 

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