Any alternative method for rubber surface treatment with halogenation?

Keivan Hasanpour You can use following alternate methods:

Corona discharge treatment: This method uses a high-voltage electric field to generate a corona discharge, which creates free radicals on the surface of the rubber. These free radicals can then react with other molecules to create functional groups, such as carboxyl groups, which can improve the wettability and adhesion of the rubber.
Cold plasma treatment: This method uses a non-equilibrium plasma, which is a gas that has been ionized but is still at a low temperature. The plasma can create a variety of reactive species, such as radicals, ions, and electrons, which can react with the surface of the rubber to create functional groups.
Sol-gel treatment: This method involves applying a sol-gel coating to the surface of the rubber. The sol-gel coating is a thin, porous layer that contains a variety of functional groups. These functional groups can improve the wettability and adhesion of the rubber.

These alternative methods are considered to be more environmentally friendly than halogenation, as they do not produce any harmful byproducts.

The best method for rubber surface treatment will depend on the specific application. If environmental concerns are a priority, then one of the alternative methods, such as corona discharge treatment or cold plasma treatment, may be a better option. However, if cost is a major factor, then halogenation may still be the best choice.

Keivan Hasanpour

Haresh Bhanushali Thanks for your reply.

Balakrishnan Arasu

Yes, there are alternative methods to create adhesion between rubber and EVA foam without resorting to halogenation. Here are a few alternatives you can consider:

Mechanical Interlocking: Creating a rough or textured surface on the rubber and EVA foam can enhance adhesion by increasing the contact area between the two materials. This can be achieved through methods like sanding, buffing, or using abrasive materials.

Surface Activation: Instead of halogenation, you can use other methods to activate the surface of the rubber and EVA foam to improve adhesion. One common method is to treat the surfaces with a plasma treatment or corona discharge. These treatments introduce reactive functional groups on the surface, enhancing the bonding properties.

Adhesion Promoters: Adhesion promoters, also known as bonding agents, are substances that enhance the adhesion between two materials. These agents can be applied to the surfaces of both rubber and EVA foam before applying the adhesive. They work by forming a chemical bond with the substrates and the adhesive, facilitating a stronger connection.

Primer Application: Applying a suitable primer or adhesive promoter specifically designed for rubber and EVA foam can improve adhesion. These primers create a bonding layer between the materials and the adhesive, ensuring better compatibility.

Solvent Cleaning: Thoroughly cleaning the surfaces of both rubber and EVA foam using appropriate solvents can remove contaminants and improve bonding. Clean surfaces provide better contact for the adhesive to establish a strong bond.

Hot Melt Adhesives: Hot melt adhesives, which are solid at room temperature and melt when heated, can be used as an alternative to polyurethane glue. They can provide good adhesion to both rubber and EVA foam without the need for surface treatments. Ensure that the specific hot melt adhesive you choose is compatible with both materials.

Silicone-based Adhesives: Silicone-based adhesives are known for their flexibility, temperature resistance, and ability to bond a variety of substrates, including rubber and EVA foam. Make sure to choose an adhesive that is suitable for the specific application.

Specialized Adhesives: Explore adhesive options that are formulated for bonding rubber and foam materials. Manufacturers often produce adhesives tailored for specific material combinations.

Before adopting any alternative method, it's important to conduct tests to ensure that the chosen adhesive and method provide the desired level of adhesion for your specific application. Adhesion strength can vary based on factors such as material composition, environmental conditions, and the stresses the bond will be subjected to. Always follow the manufacturer's instructions for the chosen adhesive and perform proper surface preparation to achieve optimal adhesion.

Hope this Helps.

Keivan Hasanpour

Thanks Balakrishnan Arasu

Keivan Hasanpour

Balakrishnan Arasu what is best solvent for eva to better adhesivity?

Balakrishnan Arasu

Toluene: Toluene is often used as a solvent for EVA because it can help improve adhesion when bonding EVA to various substrates. It's essential to use toluene in a well-ventilated area and follow safety precautions due to its flammable and toxic nature.

MEK (Methyl Ethyl Ketone): MEK is a strong solvent that can soften and improve adhesion for some types of EVA. Like toluene, it should be used with proper safety measures.

Acetone: Acetone is a commonly used solvent that can be effective for bonding EVA to various materials, especially plastics. It's essential to be cautious when using acetone, as it can be quite aggressive and may dissolve or damage some types of EVA.

Ethyl Acetate: Ethyl acetate is a less aggressive solvent compared to toluene or acetone and can be suitable for some EVA formulations. It is often used for adhesion in applications where milder solvents are preferred.

Isopropyl Alcohol (IPA): IPA is a milder solvent and is generally safer to use than more aggressive solvents. It can help with adhesion in certain EVA applications but may not be as effective as stronger solvents.

The above 5 solvents are commonly used for EVA - Which is a copolymer of Ethylene and vinyl acetate.

Compatibility: Ensure that the solvent is compatible with both the EVA material and the substrate you are bonding it to. Compatibility testing may be necessary.

Testing: Conduct adhesion tests to determine the most effective solvent for your specific application. This testing should consider the type of EVA, the substrate, and the intended use

Keivan Hasanpour Hope this helps.

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