Paper Valve Sacks
Paper Valve Sacks have been with us now for over a century, being invented in 1898 and Patented in 1908. These Sacks are used mainly for fine powders, food stuffs and Cement markets. The Valve Sack has a valve (opening) in one corner which can be either of internal or external configurations.
Valve sacks are made from multiple plies of paper tubed together to give the sack it’s strength, to prevent water ingress a polythene ply can also be inserted as an inner ply.
The valve is the integral component, it determines the sack style which when filled becomes a cube and the valve can be made in a number of ways to prevent loss of product.
It is important that these sacks are filled to their maximum so the weight of the product once in the sack acts as the method of closure. Therefore, there is no fixed size; the bag is manufactured to suit the filling method, the product being filled, its characteristics and bulk density of product.
All of our paper sacks can be produced bespoke to your individual requirements. Unprinted stock bags are also available for immediate delivery.
Contact us now to discuss your paper packaging requirements.