Product Overview
The waterborne polyurethane dispersion presents as a bluish liquid, with a solid content of 33±1%. Its pH value ranges from 7.0 to 9.0 at 25°C, and the viscosity is less than 400 mPa·s (measured by Brookfield at 25°C). When stored in intact original packaging, it remains stable for 6 months at 20°C after delivery, with a recommended storage temperature range of 5°C to 30°C. Freezing or exposure to temperatures exceeding 30°C may affect its viscosity and average particle size, potentially leading to sedimentation or coagulation. Additionally, contamination by bacteria, fungi, or algae can cause irreversible damage to the product.
Waterborne Polyurethane Dispersion
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Key Features
- Exceptional adhesion: This waterborne polyurethane dispersion exhibits excellent adhesion on various plastic or rubber substrates, ensuring strong and durable bonding.
- Solvent-free formulation: Being a solvent-free waterborne polyurethane dispersion, it eliminates the risks associated with solvent emissions, aligning with environmental and safety standards.
- Stable physical properties: With well-controlled solid content, pH value, and viscosity, it maintains consistent performance under proper storage and application conditions.
| Parameter |
Typical Value |
Unit |
Notes |
| Viscosity (25°C, Brookfield RV) |
< 500 |
mPa·s |
Spindle 3, 20 rpm |
| Soild Content |
30±1.5 |
% |
/ |
| 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
- BOPP film priming: In the packaging industry, BOPP films are widely used for food packaging, gift wrapping, and label production. Applying this waterborne polyurethane dispersion as a primer enhances the adhesion of subsequent inks and adhesives, keeping printed patterns vivid and labels firmly attached even under fluctuating temperature and humidity.
- PE film modification: PE films are commonly used in plastic bags, agricultural mulch films, and industrial product packaging. This waterborne polyurethane dispersion acts as a primer to improve the film's surface properties, enhancing compatibility with other materials and extending the service life of end products.
- PET film bonding enhancement: PET films are extensively utilized in beverage bottles, food trays, and electronic product packaging. As a primer, this waterborne polyurethane dispersion strengthens the bond between PET films and protective/decorative layers, boosting the overall durability and performance of the packaging.
- Other plastic substrate priming: Beyond film applications, it serves as a reliable primer for various plastic substrates in the automotive, electronics, and consumer goods industries, meeting critical requirements for strong adhesion and environmental friendliness.
Benefits
- Enhanced adhesion performance: By forming a strong bond between substrates and subsequent layers, this waterborne polyurethane dispersion reduces the risk of peeling, cracking, or delamination, improving the quality and reliability of the final products.
- Environmental friendliness: The solvent-free nature of this waterborne polyurethane dispersion minimizes volatile organic compound (VOC) emissions, contributing to a healthier working environment and reducing environmental impact, in line with global sustainability trends.
- Versatile application: Suitable for a wide range of plastic substrates and films, including BOPP, PE, and PET, it offers flexibility for various industries and application scenarios, reducing the need for multiple specialized products.
- Stable storage and handling: With a clear storage temperature range and stable physical properties, it is easy to store and handle, ensuring consistent performance during application and reducing product waste due to degradation.
