Surface treatment agents are indispensable polymer additives in industrial manufacturing processes such as bonding, coating, and printing. Their core function is to chemically and physically modify the surface of the substrate, thereby addressing key industry challenges—including inadequate bonding, coating delamination, and ink bleeding in printing—caused by low surface energy, weak polarity, and poor wettability of various substrate materials. These agents are critical for enhancing process stability, improving product yield rates, and extending the service life of components, and they are widely applied across multiple industrial sectors, including electronics, automotive, hardware, plastics, and silicone products. Their primary functions are as follows.
I. Enhance the surface energy of the substrate to overcome the bonding challenges of highly adhesive substrates
This constitutes the fundamental core function of surface treatment agents. In industrial production, materials such as PP, PE, nylon, and silicone rubber are inherently characterized by low surface energy, smooth surfaces, and very low polarity; consequently, conventional adhesives and coatings often fail to achieve adequate wetting on these surfaces, leading to issues such as debonding, adhesive failure, and coating delamination.
The surface treatment agent, composed of specialized polymer resin components, forms a uniform modified transition layer on the substrate surface. This process significantly enhances the surface energy of the substrate, alters its surface polarity and wettability, and enables adhesives and coatings to achieve optimal adhesion to the substrate surface. By addressing the fundamental challenge of poor adhesion in materials with low surface energy at its root, this technology makes stable bonding—once seemingly unattainable—now achievable.
II. Enhance bonding strength and improve product structural stability
In addition to achieving basic bonding, the surface treatment agent can establish robust “molecular bridges” between the substrate and the adhesive layer. On one hand, the active ingredients of the treatment agent can form extremely strong adhesion with the substrate surface, ensuring firm attachment to the substrate; on the other hand, its formulation system exhibits excellent compatibility with various adhesives and coatings, enabling the formation of stable chemical bonds with the adhesive layer. This significantly enhances the peel strength and shear strength after bonding, thereby ensuring greater stability of the product’s bonded structure. Also, high-quality surface treatment agents can improve the solvent resistance and weather resistance of the adhesive layer, preventing bonding failure under challenging operating conditions—such as extreme temperature fluctuations, humidity, or chemical corrosion—thereby effectively extending the service life of the product.
III. Optimize production processes to enhance industrial production efficiency
High-quality surface treatment agents exhibit excellent applicability, allowing them to be evenly applied to the substrate surface via brushing or spraying—without the need for complex equipment—ensuring a simple and convenient application process.
Most general-purpose surface treatment agents can be applied in subsequent bonding and adhesive application processes after brief standing time at room temperature, while specialized agents only require short-duration baking to achieve surface modification. This approach significantly simplifies traditional complex surface pretreatment procedures—such as plasma treatment or open-flame treatment—thereby reducing both equipment and labor costs, and perfectly aligning with the production rhythm of industrial mass manufacturing. Also, standardized surface treatment agents ensure consistent and stable treatment performance across different product batches, effectively enhancing the product yield rate.
IV. Precise matching of substrate materials to meet surface treatment requirements across all application scenarios
Surfaces composed of different materials exhibit vastly differing structural and chemical properties; consequently, specialized formulation systems for surface treatment agents are available to meet the specific processing requirements of various substrate materials. For instance, general-purpose surface treatment agents can be applied to the surface modification of diverse plastics—including PP, PE, PET, and nylon—as well as metals and glass fiber materials; whereas dedicated surface treatment agents can be precisely tailored to address the surface treatment needs of specialized, difficult-to-adhere elastomers such as silicone rubber and silicone, thereby specifically enhancing the adhesion between adhesives and their substrates. This approach fulfills surface treatment requirements across a full spectrum of applications, ranging from general industrial products to specialized precision components.
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surface treating agent
Product Introduction: This product is a high-molecular-weight surface conditioning agent synthesized from specialized resins. It is primarily used for treating substrates such as PP, PE, nylon, various plastics, and metals, significantly increasing the surface energy of these substrates to achieve superior bonding performance.
Product Features: Exhibits excellent adhesion to a wide range of plastic substrates; can be applied directly via brushing or spraying onto the substrate surface, thereby enhancing the adhesion of the coating to the substrate, improving solvent resistance, and increasing bond strength.
Application Areas: Suitable for surface treatment of various plastics (PP, PE, PET, nylon, etc.), glass fibers, and metals.
surface treating agent
Product Introduction: This product is a high-molecular-weight surface conditioning agent synthesized from silicone resin, specifically designed for silicone rubber and silicone gel substrates. It effectively enhances the adhesion between hot-melt adhesives or thermosetting adhesives and silicone rubber or silicone gel.
Product Features: Exhibits strong adhesion to silicone rubber and silicone materials; can be applied directly via brushing onto the substrate surface, significantly enhancing the adhesion of the coating to silicone rubber substrates, while delivering consistent bonding performance.
Application: Suitable for surface treatment of silicone rubber and silicone, enhancing the adhesion of hot-melt adhesives or thermosetting adhesives to silicone rubber and silicone.
Match the Surface Treatment Agent to the Surface and Adhesive System
A surface treatment agent should be selected for the actual interface rather than the material name alone. Identify the substrate finish, the proposed adhesive and the preparation steps already used on the line. A molded plastic surface can carry processing residues, while a metal part may present a coating rather than bare metal. Applying a treatment over a weak or contaminated layer can leave that layer as the eventual failure location. Why introduce another coating before establishing what the adhesive is actually bonding to? Check cleanliness and compatibility first, then trial the treatment using the selected adhesive. A primer or adhesion promoter can create a useful intermediate layer, but its performance depends on the specific material combination and application conditions. More treatment is not automatically better; an uneven or excessive deposit can become a separate weak layer. It’s helpful to compare untreated, cleaned and treated samples while keeping the joint geometry and cure conditions consistent. The structural bonding adhesive category can support a discussion of the complete bonding system, including the intended preparation route rather than an isolated treatment product.
Control the interval between treatment and bonding
During a surface treatment agent trial, record the application method, coverage and condition of the surface before adhesive dispensing. Follow the formulation’s instructions for drying or reaction, and check whether the treatment is compatible with the substrate and any underlying finish. Treating a flat sample successfully does not establish coverage in a recessed or textured production part. Include those features in the trial and inspect areas where excess liquid can collect. The interval between preparation and bonding also deserves control: handled or stored surfaces can acquire contamination, and a treatment’s usable bonding window is formulation-specific. After the adhesive has cured, examine the failure location rather than attributing every strength change to surface activation. Separation within a coating, at the primer interface or inside the adhesive calls for different corrective work. Repeat the comparison after relevant environmental exposure to see whether the improvement remains useful in the actual joint. For further guidance, share the surface preparation process with JOME, including substrate finish, adhesive family and photographs of both fracture surfaces.
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