Common types of kraft paper cement bags mainly include the following:
According to the number of layers
- Single-layer kraft paper cement bag: It is made of a single layer of kraft paper. It has a certain strength and can play a basic role in containing cement, but it may have relatively poor resistance to abrasion and moisture compared to multi-layer bags.
- Multi-layer kraft paper cement bag: Usually composed of two or more layers of kraft paper. The additional layers improve the strength, durability and moisture resistance of the bag.
According to the opening method
- Valve bag: It has a valve at one end. Cement can be filled into the bag through the valve, and then the valve is sealed. This type of bag is convenient for filling and sealing, and can effectively prevent cement from leaking during the filling process. It is widely used in automated cement packaging production lines.
- Open-mouth bag: As the name suggests, one end of the bag is open. Cement is filled into the bag from the open end, and then it is sealed by sewing or other methods.
According to the printing and coating situation
- Plain kraft paper cement bag: The surface of the bag is not printed or has only simple markings, and there is no special coating treatment.
- Printed kraft paper cement bag: The surface of the bag is printed with information such as the brand, specification, and usage instructions of the cement, which is convenient for identification and use.
- Coated kraft paper cement bag: A layer of coating is applied to the surface of the kraft paper, which can improve the moisture resistance, waterproofness and abrasion resistance of the bag.
