Dispersionsklebstoffe

PVAc, PU, VAE, EPI

Dispersion adhesives are water-based adhesive systems which form bonds through physical hardening as the water evaporates. The bonding effect is provided by a polymer component which forms a film when the aqueous component evaporates.

Depending on the application and chemical basis of the adhesive it may be necessary to add an isocyanate crosslinker or nitrate hardener before processing. This process can increase the bond’s resistance to heat and moisture.

We can supply a wide range of powerful dispersion adhesives used in the wood-processing industry, in the paper and packaging industry, the graphics industry, as well as in the automotive, textile and electrical industries.

Dispersion adhesives of the latest generation facilitate high processing speeds with low plant costs.

Another major requirement is the appearance of the bondline after film-forming. A high degree of gloss and high transparency of the dispersion adhesive are very important, as is the prevention of discoloured joints.

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Dispersion adhesives provide the following benefits:

  • Easy processing (by roller, spraying and pouring)
  • Ecological due to water basis
  • Good storage stability
  • Tried and proven quality
  • Low production costs
  • Easy cleaning
  • Uncomplicated disposal of water used for flushing and cleaning liquids
  • Emissionsarm
  • Processing at room temperature
Dispersionsklebstoffe

Produktserien, Eigenschaften und Anwendungen

PVAc-Dispersionsklebstoff

Basis
Polyvinyl acetate
Verpackungsoptionen
Tin can, hobbock, drum
Marken
Senta BONDAX, Jowacoll

PVAc dispersion adhesives are water-based thermoplastic adhesive systems in which polyvinyl acetate-based polymer particles are dispersed in water. After application, as water evaporates into the surrounding environment or is absorbed by the substrate, the polymer particles move closer together and coalesce to form a continuous adhesive film, allowing bond strength to develop.

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Viscosity, solids content, open time, pressing time, and minimum film-forming temperature are among the key parameters that determine processing performance. Depending on the formulation, these adhesives can be engineered to provide rapid initial tack, short pressing times, high final bond strength, and varying levels of water and heat resistance.

Their water-based composition provides good processability with application equipment and helps reduce solvent emissions in the production environment compared with solvent-based adhesive systems. When proper surface preparation, an appropriate application amount, controlled pressing conditions, and sufficient drying are ensured, PVAc dispersion systems form durable, uniform, and high-performance adhesive bonds.

They can be formulated to provide high adhesion performance particularly on wood, wood-based panels, paper, cardboard, and other absorbent or porous substrates. They are widely used in furniture manufacturing and woodworking, solid wood bonding, lamination, veneer and foil bonding, panel manufacturing, assembly, paper converting, and packaging applications.

PU-Dispersionsklebstoff

Basis
Polyurethane
Verpackungsoptionen
Tin can, hobbock, drum
Marken
Senta BONDAX, Jowapur

PU dispersion adhesives are high-performance water-based adhesive systems in which polyurethane-based polymers are dispersed in water. After application, as the water is removed, the polyurethane particles coalesce to form a continuous and flexible adhesive film, allowing bond strength to develop.

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Viscosity, solids content, open time, drying time, activation temperature, and film-forming characteristics are among the key technical parameters that determine application and processing performance. When proper surface preparation, controlled application amount, sufficient drying, and appropriate activation conditions are maintained, PU dispersion systems form flexible, durable, and long-lasting adhesive bonds.

Thanks to their high flexibility, they can accommodate movement between materials with different mechanical and thermal properties, helping to compensate for stresses that may develop within the bonded joint. Suitable formulations can be heat-activated and engineered to provide the performance required for applications demanding high resistance to heat, moisture, plasticizers, and aging.

Depending on the formulation, they can provide high adhesion to a wide range of substrates, including wood, plastics, textiles, foams, leather, composites, and various surfacing materials. Typical applications include furniture manufacturing and woodworking, 3D lamination, foil and surface lamination, textiles, automotive interior trim, foam and upholstery applications, as well as a wide range of industrial bonding processes.

VAE Dispersion Adhesive

Basis
Vinyl acetate ethylene copolymer
Verpackungsoptionen
Tin can, hobbock, drum
Marken
Senta BONDAX, Jowacoll

VAE dispersion adhesives are water-based thermoplastic adhesive systems in which vinyl acetate-ethylene copolymers are dispersed in water. The ethylene component within the polymer structure contributes to enhanced flexibility, improved low-temperature performance, and better compatibility with different substrates compared with conventional vinyl acetate-based systems.

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Properties such as viscosity, solids content, open time, drying time, film-forming temperature, and initial tack can be optimized to meet the requirements of different manufacturing processes. When proper surface preparation, an appropriate application amount, and controlled drying conditions are maintained, VAE dispersion systems form uniform, flexible, and reliable adhesive bonds.

Thanks to their flexible film structure, they help accommodate stresses that may develop in bonded joints subjected to folding, forming, or mechanical movement. After application, as the water is removed, the polymer particles coalesce to form a continuous and flexible adhesive film, allowing bond strength to develop.

Depending on the formulation, they can provide balanced wetting and high adhesion performance on paper, cardboard, wood, textiles, foils, and various porous or absorbent substrates. Typical applications include packaging, paper and cardboard converting, lamination, textiles, furniture manufacturing, foil bonding, and a wide range of industrial assembly applications.

EPI Dispersion Adhesive

Basis
Copolymer
Verpackungsoptionen
Tin can, hobbock, drum
Marken
Senta BONDAX, Jowacoll

EPI dispersion adhesives are two-component, water-based reactive adhesive systems consisting of a polymer dispersion component combined with an isocyanate-based hardener at a defined mixing ratio. After application, film formation takes place as the water is removed, while a simultaneous chemical crosslinking reaction develops a strong adhesive structure with high cohesive strength and mechanical performance.

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Thanks to their two-component reactive chemistry, they can be formulated to provide superior performance in bonded joints requiring high resistance to water, moisture, and heat compared with conventional thermoplastic dispersion adhesive systems.

When the correct component ratio, homogeneous mixing, proper surface preparation, and controlled pressing conditions are maintained, EPI dispersion systems form high-strength, long-lasting, and reliable adhesive bonds. Mixing ratio, pot life, viscosity, open time, application amount, and pressing time are key technical parameters that determine process reliability and final bond performance.

Depending on the formulation and processing conditions, these systems can achieve high water-resistance classifications and provide reliable bond performance under varying temperature conditions. They provide high adhesion to wood and wood-based materials and are particularly suitable for bonding applications requiring high mechanical strength and resistance to environmental influences. Typical applications include solid wood lamination, window and door manufacturing, building components, panel production, and a wide range of industrial wood bonding applications.

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