When it comes to making the most difficult material to stick, rubber is definitely in the top 10. But in reality rubber so frequently appears in our daily life, in the industrial field is also very widely used, has become an inseparable, closely related partner.

However, rubber itself has the advantages of strong wear resistance and excellent elasticity, which makes it very difficult to bond with other materials. The wide use of plasma surface processing machines has solved this problem.

Plasma cleaning technology makes use of the characteristics of low-temperature plasma to make the plasma contact and react with the surface of the material, so that the surface of the treated material can be cleaned chemically and physically. It not only removes the surface organic pollutants, improves the moisture-friendliness and performance, but also improves the adhesion of the surface.

And the use of plasma cleaning can not only solve the problem of different materials bonding difficult, poor hydrophilicity, organic pollutants, but also do not damage the basic energy of the product itself, so low temperature plasma treatment of rubber material such as bag.

The case of Fangrui Technology processing, it is also rubber material products.

Recently, we were approached by a shoe company that works with Fangrui, whose products include anti-slip rubber soles. Before this, they are the use of adhesive aid this traditional way, let the rubber shoe stick and acrylic pressure sensitive adhesive for fitting, but often dozens of minutes after the acrylic pressure sensitive adhesive or off, not only does not play a good role, but also increases the production cost. Therefore, the customer wanted to find a perfect way to achieve the non-slip adhesive and acrylic pressure sensitive adhesive bonding, and the requirement is permanent.

After understanding the customer’s needs, we immediately developed a detailed treatment and verification scheme according to the product material and the actual situation. Before bonding, we choose to treat the rubber surface with atmospheric type low-temperature plasma equipment. In order to process more efficiently, we make the machine combined with the line to use online, which is convenient and fast to process six rubber sole anti-slip stickers at one time.

After treatment, we first tested the hydrophilicity with a 60 dyne pen. After successful validation, and then processed six rubber non-slip soles stick into two portions, three of them directly after low temperature plasma treatment with antiskid stick with acrylic pressure sensitive adhesive (sample 1), the remaining three after plasma treatment is used for adhesion promoter to wipe rubber antiskid stick with acrylic pressure sensitive adhesive (sample 2). Secondly, we also prepared three samples that were directly wiped with adhesive aid and bonded with acrylic pressure-sensitive adhesive for effect comparison (sample 3). According to the customer’s requirements, in order to get a better bonding effect and more objective comparison and verification results, we also pressed on acrylic pressure sensitive adhesive. After several hours, neither of the two acrylic pressure-sensitive adhesives attached to the non-slip rubber soles had come off.

Finally, after the product was sent back to the customer, we got that the acrylic pressure-sensitive adhesive of sample 1 and sample 2 after plasma treatment did not fall off. However, the bonding effect of sample 1 was still inferior to that of sample 2. However, the adhesive effect of sample 3 bonded by rubber anti-slip adhesive and acrylic pressure-sensitive adhesive without plasma treatment is far worse than that of sample 1 and sample 2.

So in the end, the customer’s rubber products treated with atmospheric plasma and the use of adhesive is the final solution to this problem.