How to glue Natural Rubber (NR) also called natural rubber

Natural rubber is created by processing latex from Hevea brasiliensis. Hevea brasiliensis is a plant native to the Amazon valley and is the only known plant that produces high-molecular-weight linear polymer with 100% cis 1,4 polyisoprene. To obtain the latex, the tree is "tapped." This is the process of cutting the bark back in thin sections so the latex flows. The latex is then collected, treated with a stabilizer to prevent premature coagulation, and sent to a processing center. The collection and processing technique determines the quality of natural rubber. There are eight different types of natural rubber, which are then classified into 35 technically specified international grades. The grade indicates color, purity, presence of bubbles, and uniformity of appearance.

Natural rubber achieves its extraordinary tensile strength, tear strength, and abrasion resistance through rapid crystallization when stretched. Natural rubber has excellent elasticity and fatigue life at large strains, which is better than SBR. At low strains, the opposite is true. The strength properties of natural rubber decrease with increasing temperature, but strength at temperature is generally better than other elastomers. Natural rubber has very good processing properties and can be processed using various techniques. Conventional processing gives natural rubber excellent initial properties such as strength, wear resistance, and fatigue tolerance. Thermal resistance, creep, and stress relaxation properties of conventionally processed natural rubber are not as desirable.

Natural rubber is widely used in industries due to its excellent properties. Applications include manufacturing hoses, conveyor belts, gaskets, and seals, where high tensile and wear strength make it ideal for rugged environments. In engineering, natural rubber is used to create springs, mounts, and bushings that require good elasticity and shock absorption.

The surface tension of natural rubber (NR) typically ranges between 20 and 40 dyn/cm.

Natural rubber is available under different trade names depending on its form and treatment:
Compo Crepe, Estate Brown Crepe, Flat Bark Crepe, Pale Crepe, Pure Smoked Blanket Crepe, Ribbed Smoked Sheet, Thick Blanket Crepe, and Thin Brown Crepe.

Bonding

Remove any oil, dirt, or contamination from the surface that may affect adhesive bonding. Use a non-aggressive cleaning solvent.

Consider using a primer or performing a corona or plasma treatment to enhance adhesion.

Choose an appropriate NR adhesive

• -Cyanoacrylate adhesive is known for its fast curing and strong adhesion to various materials, including rubber and elastomers such as NR. It is important to note that adhesive effectiveness may vary depending on the specifications of the natural rubber and the specific requirements for strength and durability in the particular application.
• -UV-curable adhesive is designed to cure quickly when exposed to ultraviolet light of suitable wavelength. The adhesive typically cures within seconds to minutes depending on the light source and material thickness. Overall, the combination of natural rubber (NR) and UV-curable adhesive enables effective, reliable, and environmentally friendly bonding that meets the requirements of modern production environments and applications.

It is always recommended to perform adhesive tests to ensure the glue meets the required strength and durability for your specific application.

Manufacturers

Manufacturers of the international types of natural rubber, such as Compo Crepe, Estate Brown Crepe, Flat Bark Crepe, Pale Crepe, Pure Smoked Blanket Crepe, Ribbed Smoked Sheet, Thick Blanket Crepe, and Thin Brown Crepe, include leading rubber plantations and refineries worldwide. These manufacturers are known for their expertise in selection, processing, and quality control of natural rubber in various formats and specifications.

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