In adhesive manufacturing, polymer emulsion is the core component determining bonding strength, durability, and stability of the final product. Depending on the substrate and application conditions, each emulsion type delivers different performance. Choosing the right emulsion for each adhesive helps optimize efficiency, reduce production costs, and extend product life. It is also a key factor in ensuring quality and long-term performance during use.
OVERVIEW OF EMULSIONS IN ADHESIVES
A polymer emulsion is a dispersion of polymer particles in water, acting as the primary binder in adhesive formulations. Compared to solvent-based systems, water-based emulsions are safer, less toxic, and more environmentally friendly. Common emulsions used in the adhesive industry include PVAc, VAE, Acrylic, Styrene-Acrylic, EVA, PU Dispersion, SBR, and Water-based Polyurethane 2K. Each polymer structure has unique characteristics that affect flexibility, adhesion strength, water resistance, and mechanical performance of the adhesive.
FACTORS AFFECTING EMULSION SELECTION
Substrate type and application purpose
Each material surface has different properties, so compatibility with the adhesive varies. PVAc is typically used for wood and paper thanks to its fast drying and good penetration. In contrast, EVA or PU Dispersion works better with plastics, leather, and flexible materials, ensuring elasticity and strong mechanical strength. Choosing the correct emulsion type helps the adhesive bond firmly without peeling or cracking, maintaining long-term stability.
Environmental and technical requirements
Products used outdoors or in humid environments should utilize Acrylic or PU emulsions for their excellent UV and water resistance. For indoor applications, VAE or Styrene-Acrylic offers a cost-effective solution while maintaining good adhesion. Some advanced formulas employ water-based PU 2K systems to enhance tensile strength, heat resistance, and chemical durability.
Drying time and curing system
1K emulsions such as PVAc and VAE dry quickly, are easy to handle, and suitable for large-scale production. Meanwhile, 2K water-based systems (combined with hardeners like Bayhydur) form stronger polymer networks, ideal for high-performance adhesives that require exceptional durability and long service life.
POPULAR EMULSION TYPES AND THEIR APPLICATIONS
PVAc and VAE
PVAc (Polyvinyl Acetate) is cost-effective, adheres well to cellulose, forms a clear film, and dries quickly. It is commonly used in wood glue, paper, and carton adhesives, though it lacks water resistance for humid conditions. VAE (Vinyl Acetate-Ethylene) improves on PVAc by adding ethylene, enhancing flexibility and moisture resistance. This makes it suitable for outdoor wood glues, construction materials, and industrial flooring adhesives, offering greater weather stability and flexibility.
Acrylic and Styrene-Acrylic
Acrylic Emulsion provides outstanding UV resistance, water repellence, and weather durability. It is ideal for plastic, fabric, and outdoor material adhesives. The adhesive film remains transparent and color-stable over time. Styrene-Acrylic delivers similar performance but at a lower cost due to the presence of styrene. It is widely used in tile adhesives, construction glues, and signage bonding. These two emulsions are popular choices that balance quality and affordability.
EVA and PU Dispersion
EVA (Ethylene Vinyl Acetate) offers high flexibility and strong adhesion on smooth surfaces such as plastic or leather. It is used in packaging adhesives, film lamination, synthetic leather, and flexible substrates. EVA produces a soft, elastic film that resists cracking under stress. PU Dispersion (PUD) represents a premium option with superior mechanical strength, chemical resistance, and elasticity. Water-based PU is suited for footwear, leather, technical plastic adhesives, and other demanding applications requiring high tensile strength and long-lasting flexibility.
SBR and PU 2K
SBR (Styrene Butadiene Rubber) provides good tensile strength and elasticity, suitable for carpet, rubber, ceramic, and flooring adhesives. Although not as water-resistant as PU or Acrylic, SBR remains an economical and stable choice. Water-based Polyurethane 2K is a high-performance system that uses a hardener to create a robust polymer network. It delivers exceptional weather, chemical, and load resistance, making it ideal for technical adhesives, outdoor materials, premium wood bonding, and metal applications.
VICHEM – SINOPEC’S OFFICIAL PVA AND VAE DISTRIBUTOR IN VIETNAM
Vichem is the official distributor of Sinopec’s PVA and VAE lines in Vietnam. We not only provide quality products but also provide after-sales services that meet international standards. Services include:
- Technical consulting: Our experts help you select the most suitable emulsion and formulation for your specific application.
- Color-matching tests: Vichem’s laboratory conducts professional testing to ensure precise color and performance consistency.
- Practical application support: We assist customers in integrating our materials into their production processes for optimal results.
For more information about our products and technical services, please contact us via:
📞 Hotline: 08 1790 1790
📧 Email: contact@vichem.vn
🔎 LinkedIn: Vichem JSC
🌐 Website: www.vichem.vn
📌 Facebook: Vichem JSC
