Types of granules refer to different categories or classifications of granular materials. Granules are solid particles that are typically larger than fine powders but smaller than pellets. They are commonly used in various industries for their flowability, ease of handling, and suitability for specific applications. Here are some common types of granules:

1. Plastic Granules: Plastic granules are small, solid particles made from plastic resins. They are used as raw materials in the plastics industry for manufacturing a wide range of plastic products. Different types of plastic granules are available, such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and polystyrene (PS).
2. Pharmaceutical Granules: Pharmaceutical granules are particles used in the pharmaceutical industry for various purposes. They can contain active pharmaceutical ingredients (APIs) or excipients and are often used as intermediates for the production of tablets, capsules, or other dosage forms. Pharmaceutical granules can be designed for controlled release, improved bioavailability, or enhanced stability.
3. Agricultural Granules: Agricultural granules are granular materials used in agriculture for soil improvement, fertilization, and pest control. They can include fertilizers, soil conditioners, pesticides, and insecticides. Agricultural granules are designed to provide essential nutrients to plants, enhance soil structure, or protect crops from pests and diseases.
4. Food Granules: Food granules are granular materials used in the food industry for various purposes. They can include ingredients such as sugar, salt, flour, spices, or food additives. Food granules are commonly used in baking, seasoning, flavoring, and food processing applications.
5. Metal Granules: Metal granules are small particles made from metallic materials. They are often used in metallurgical processes, such as alloy production, metal casting, or powder metallurgy. Metal granules can be composed of various metals, including iron, aluminum, copper, or alloys such as stainless steel.
6. Construction Granules: Construction granules are granular materials used in the construction industry for applications such as concrete production, road paving, or roofing. They can include aggregates, sand, gravel, or mineral fillers. Construction granules provide strength, stability, and other desired properties to construction materials.

These are just a few examples of the types of granules that exist. The choice of granules depends on the specific industry, application requirements, and desired properties. Granules are often selected based on factors such as particle size, shape, composition, and functionality to achieve the desired performance in the intended application.