VINNAPAS EP 724

Choosing the appropriate binder is often the decisive factor in high-performance adhesive formulation. As end-user requirements become increasingly stringent—demanding higher line speeds, superior adhesion to difficult substrates, and stricter environmental compliance—vinyl acetate-ethylene (VAE) copolymer technology has established itself as a versatile benchmark across Asia-Pacific and global markets.   1.The Chemistry Behind VAE Copolymer Systems VAE dispersions are water-based systems produced by copolymerizing vinyl acetate and ethylene monomers. Each monomer contributes distinct mechanical and physicochemical properties to the polymer backbone:   Vinyl Acetate (VAC) Segment: Provides structural rigidity, polarity, and high glass transition temperature (Tg ≈ 32℃). The polar nature ensures strong cohesion and adhesion to hydrophilic substrates. Ethylene Segment: Acts as an internal, permanent plasticizer (Tg ≈ -125℃). Ethylene incorporation imparts permanent flexibility, non-polar characteristics, hydrophobic resistance, and high saponification stability without requiring external plasticizer additives. By altering the ethylene content during polymerization, the glass transition temperature (Tg) of VINNAPAS VAE dispersions can be precisely tuned across a broad spectrum, ranging from -35℃ to +30℃.      2. Key Technical Advantages in Processing & Performance Formulating with VINNAPAS VAE emulsions delivers several key operational benefits: Broad Substrate Adhesion: Excellent bonding to polar substrates (paper, wood) as well as low-energy/non-polar plastic surfaces (OPP, PET, coated board, and foils). High-Speed Machinability & Re-emulsification: Essential for jetting/nozzle (HH) application systems, preventing nozzle clogging and buildup during fast packaging operations. Balanced Cohesion, Tack, and Heat Resistance: Offers rapid setting speed alongside high wet tack and thermal stability.   3. Product Portfolio Comparison & Technical Data The following reference guide highlights the most commonly specified VINNAPAS® grades in packaging, woodworking, pressure-sensitive, and film lamination applications: Product Model Polymer Type Solid Content (%) Viscosity (mPa·s) PH Key Performance & Application Characteristics VINNAPAS EP 701K VAc-E 55 2,000 - 4,000 4-6 Universal binder for paper packaging. Outstanding performance in high-speed nozzle (HH) jetting, foil-to-paper, and film-to-wood lamination. VINNAPAS EP 706K VAc-E 55 4,400 - 5,400 4-6 High-viscosity version of EP 706. Offers strong wet tack, excellent nozzle jetting stability, and versatile film-to-wood lamination. VINNAPAS EP 707K VAc-E 55 1,300 - 2,000 4-6 Low viscosity combined with rapid setting speed and high flexibility. Demonstrates superior cohesion and water resistance. VINNAPAS EP 724 VAc-E 55 1,500 - 2,500 4-6 High tensile & cohesion strength and thermal resistance. Often blended with PVAc homopolymers to boost initial tack and speed. VINNAPAS 320 VAc-E 55 800 - 2,000 4-6 High-solid VAE delivering excellent flowability, rapid substrate wet-out, and strong adhesion to various rigid surfaces. VINNAPAS EAF 68 VAc-E-A 58-62 4,500 - 9,500 4-5 Acrylic-modified VAE pressure-sensitive emulsion. Engineered for high shear resistance and exceptional bonding on OPP, PET, and UV coatings. VINNAPAS 6300 VAc-E 63 600 - 1,500 4.3-5.3 High solids with carboxylic acid functionality. Offers versatile compounding flexibility, fast setting speed, and alkaline aqueous cleanability. VINNAPAS DPN 15 VAc 52 12,000 - 18,000 2.2-3.5 Benchmark binder for wood adhesives meeting D3/D4 water resistance standards.     4. Formulation Selection Guide by End-Use Application Packaging & High-Speed Jetting: VINNAPAS EP 701K, VINNAPAS EP 706K, and VINNAPAS 320 are industry standards for paper packaging, envelope converting, and non-contact nozzle applications. Film Lamination & Plastic Substrates: VINNAPAS EAF 68 and VINNAPAS 6300 excel on non-polar or low-energy substrates including OPP, PET, and UV-coated surfaces. Woodworking & Waterproof Adhesives: VINNAPAS DPN 15 and VINNAPAS EP 724 deliver high cohesion and heat/water resistance required for 3D membrane pressing and D3/D4 rated formulations.   Website: www.elephchem.com whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com