Known as block bottom sacks or pinch bottom sacks are a type of large bag used for storing and transporting dry bulk materials. AD star sacks are made from laminated polypropylene fabric and are designed with a unique, block-shaped bottom that allows them to stand upright when filled with material. The block bottom is formed by folding the fabric and heat-sealing it to create a strong, stable base.

AD star sacks are known for their strength and durability, and are commonly used for storing and transporting materials such as pet food, animal feed, and chemicals. They are designed with lifting loops and a discharge spout, which makes them easy to handle and transport.

One of the key advantages of AD star sacks is their ability to maintain their shape and stability even when partially empty. This makes them ideal for materials that settle or shift during transport, as the block bottom helps to keep the sack upright and prevent damage to the material. AD star sacks are also reusable and recyclable, which makes them a more sustainable option than traditional small bags.

AD star sacks can be customized with branding and product information, and can be designed with different types of liners or coatings depending on the specific application. They can also be certified to comply with industry standards for materials such as food products or hazardous materials.