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SU BAZLI PRİMERLER, SOLVENT BAZLI PRİMERLER, YIKAMA PRİMERLERİ

Primers, also called adhesion promoter or chemical bridges, function as a bonding layer between the substrate and the adhesive, and improve the adhesion.

They are used mainly on surfaces which are difficult to bond or in applications with very high demands regarding resistance to moisture and heat.

Many of our primers contain highly dispersed silica acid which expands the surface and facilitates a permanent bond.

Applying a primer which is compatible with the specific adhesive is often the most suitable or the only method to achieve an optimum adhesion to the substrate. Additionally, the primer may also function as a barrier protecting the surface against infiltration of water or other external elements, and therefore significantly increase the ageing resistance and permanent tack of the surface finishing.

Primers are usually applied in a thin film to ensure a proper drying of the coating. Due to the long-lasting effect of the dried primer, the primer application and the bonding process can generally be carried out independently at different times.

Depending on the material, some substrates may require an “oxidative pretreatment” before the primer is applied.

Adhesion to the substrate and the cohesion of the primer film can be improved by mixing the primer with a crosslinking agent. For some materials like PP, it is absolutely necessary to add a crosslinking agent.

特点

Primer provide the following benefits:

Universal use of adhesives
Adhesion to the most different materials
Permanent bonds to meet the strictest requirements
Frequently preserving the surface pretreatment

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产品系列、性能与应用

Water-based Primer

基材: Polyurethane
包装选项: Bucket, hobbock, drum, IBC
品牌: Senta PRIMAX, Jowat

Water-based primers are surface pretreatment systems used to prepare different substrates for bonding and to improve adhesion between the adhesive and the substrate, with polymers and functional components dispersed or dissolved in water. Following application, evaporation of the water or its absorption into the substrate results in the formation of a thin, uniform primer film that modifies the surface properties for the subsequent bonding process.

Binder polymers, wetting agents, and other functional additives used in the primer formulation play an important role in improving substrate wettability, adhesive spreading, and adhesion between the substrate and the adhesive. Viscosity, solids content, coating weight, drying time, surface energy, and application temperature are among the key technical parameters governing process reliability and subsequent bonding performance.

Suitable formulations can improve surface energy and chemical compatibility, particularly on difficult-to-bond substrates or substrates with variable surface characteristics, thereby providing a more uniform and reliable surface for subsequent adhesive bonding. Their water-based composition contributes to reduced volatile organic compound (VOC) emissions compared with solvent-based primers and enables processing using automated coating, roller, spray, or other industrial application systems.

With the appropriate primer selected according to the adhesive system and substrate characteristics, water-based primers can be used to improve adhesion to plastics, films, foils, paper, wood, and various surfacing materials. Typical applications include profile wrapping, lamination, edge banding, packaging, furniture and woodworking, as well as a wide range of industrial bonding processes where improved surface preparation and long-term bond reliability are required.

Solvent-based Primer

基材: Polyurethane / Ethylene vinyl acetate / PVC
包装选项: Bucket, hobbock, drum, IBC
品牌: Senta PRIMAX, Jowat

Solvent-based primers are surface pretreatment systems used to prepare difficult-to-bond substrates and improve adhesion between the adhesive and the substrate, with functional polymers and additives dissolved in organic solvents. Following application, evaporation of the solvents results in the formation of a thin, uniform primer film on the substrate, which modifies the surface properties and creates a suitable interface for the subsequent bonding process.

Binder polymers, adhesion promoters, wetting agents, and other functional additives used in the formulation play an important role in improving substrate wettability, adhesive spreading, and interfacial adhesion in the primer–substrate–adhesive system. Viscosity, solids content, coating weight, flash-off time, application temperature, and surface condition are among the key technical parameters governing process reliability and subsequent bonding performance.

Suitable formulations can modify surface characteristics and improve chemical compatibility with the adhesive, particularly on low-surface-energy or otherwise difficult-to-bond substrates, thereby providing a more uniform and reliable surface for adhesive bonding. The rapid evaporation of organic solvents can provide short drying times and enable rapid continuation of the production process; however, solvent emissions, ventilation, occupational safety, and process temperature must be carefully controlled during application.

With the appropriate primer selected according to the substrate and adhesive system, solvent-based primers can be used to improve adhesion to plastics, polymer films, foils, metals, and various surfacing materials. Typical applications include profile wrapping, lamination, edge banding, furniture and woodworking, automotive applications, and a wide range of industrial assembly processes where improved surface preparation, process reliability, and long-term bond performance are required.

Solvent-based Wash Primer

基材: Polyurethane / PVC
包装选项: Bucket, hobbock, drum, IBC
品牌: Senta PRIMAX, Jowat

Solvent-based wash primers are solvent-borne surface pretreatment systems designed to prepare substrates for subsequent adhesive bonding while removing oils, process residues, and other surface contaminants that may adversely affect adhesion. During application, the solvent components help dissolve and remove oily and organic residues from the substrate surface, while functional components within the formulation can contribute to improved adhesion between the adhesive and the substrate.

Following evaporation of the solvents, the substrate is left with a clean, controlled, and more suitable surface condition for subsequent adhesive application, promoting uniform wetting and spreading of the adhesive. Solvent composition, cleaning efficiency, evaporation rate, flash-off time, coating weight, and chemical compatibility with the substrate are among the key technical parameters governing the effectiveness of surface preparation and subsequent bonding performance.

With the appropriate product and processing conditions, combining surface cleaning and priming in a single pretreatment step can help reduce process time and the number of processing stages, particularly on continuous production lines. Controlled coating weight, sufficient flash-off time, and prevention of surface recontamination are critical processing conditions for achieving reliable and reproducible adhesion performance following pretreatment.

Although solvent-based wash primers can be used on plastics, polymer films, metals, and various coated surfaces, substrate compatibility should be verified prior to application to ensure that the solvent system does not cause swelling, stress cracking, or surface deformation. Typical applications include profile wrapping, lamination, furniture and component manufacturing, automotive applications, and a wide range of industrial assembly processes where surface cleaning and adhesion promotion prior to adhesive bonding are required.