TPR and EVA Compound:

Polymers are large molecules composed of repeating structural units called monomers. They are the foundation of various materials we encounter daily, including plastics, rubbers, fibers, and adhesives. Polymers can be classified into two main types: thermoplastics and thermosets. Thermoplastics can be melted and reshaped multiple times without undergoing significant chemical change, making them recyclable. Examples include polyethylene, polypropylene, and polyvinyl chloride (PVC). Thermosets, on the other hand, undergo irreversible chemical reactions during curing and cannot be re-melted. Examples include epoxy and phenolic resins. Polymer granules, also known as polymer pellets or resin pellets, are small, spherical particles of polymers that serve as the raw material for various plastic products. These granules are typically produced through a process called polymerization, where monomers (small molecules) are chemically bonded together to form long chains of polymers.

Key points about polymer granules:

1. Raw Material: Polymer granules are the basic building blocks for manufacturing plastic products. They are derived from different types of polymers such as polyethylene, polypropylene, polyvinyl chloride (PVC), and polystyrene, among others.

2. Versatility: Polymer granules are highly versatile and can be used to create a wide range of plastic products, including packaging materials, containers, toys, automotive parts, pipes, and more. The choice of polymer granules depends on the specific properties required for the end product.

3. Processing: These granules are melted and molded into various shapes using techniques like injection molding, extrusion, and blow molding. The granules melt at a specific temperature, allowing them to take the shape of the mold they are injected into.

4. Additives: Polymer granules can be modified by adding various additives such as colorants, stabilizers, plasticizers, and fillers. These additives enhance the properties of the final plastic product, making it suitable for specific applications.

5. Recyclability: Many polymer granules are recyclable, contributing to environmental sustainability. Recycling processes involve melting the used plastic and reforming it into new granules, reducing the need for virgin polymer production.

6. Transport and Storage: Polymer granules are easy to transport and store due to their small size and uniform shape. They are typically packed in bags or large containers for convenient handling and shipping to manufacturers.

7. Quality Control: Manufacturers carefully control the size, shape, and composition of polymer granules to ensure consistency and quality in the final products. Quality control measures help maintain the desired properties of the plastic items being produced.