World Paper Bag Day 12 July 2020 marks the recognition of use of paper bags and encourages it’s use as a choice for carrying garments, groceries and industrial goods.
A conventional paper bag is a bag made of paper, usually kraft paper. Paper bags are commonly used as shopping bags, packaging, and sacks. Paper bags offer a better alternative to plastic bags in a fight to climate change. Though it can be argued that paper making is an energy intensive process, but at the same time, it can be produced through sustainable manufacturing processes. Over and above, paper in all its forms is recyclable.
The paper bag machine was first made in 1852, by a schoolteacher Francis Wolle, invented the first machine to mass-produce paper bags. Wolle and his brother patented the machine and founded the Union Paper Bag Company.
In 1871, inventor Margaret E. Knight designed a machine that could create flat-bottomed paper bags, which could carry more than the previous envelope-style design.
Common types of Paper Bags
Paper shopping bags, brown paper bags, grocery bags, paper bread bags and other light duty bags have a single layer of paper. A variety of constructions and designs are available. Many are printed with the names of stores and brands. Paper bags are not waterproof. Types of paper bag are: laminated, twisted, flat tap. The laminated bag, whilst not totally waterproof, has a laminate that protects the outside to some degree. Standard tote-style brown paper bags are made from kraft paper. These bags are made of recycled paper.
The market for FSC certified kraft paper bags is showing a good revival, and the market for papers bags has also picked up because of increasing demand in food delivery and online delivery businesses. We can help you with FSC certification of paper bags.
Multiwall (or multi-wall) paper sacks or shipping sacks are often used as shipping containers for bulk materials such as fertilizer, animal feed, sand, dry chemicals, flour and cement. Many have several layers of sack papers, printed external layer and inner plies. Some paper sacks have a plastic film, foil, or polyethylene coated paper layer in between as a water-repellant, insect resistant, or rodent barrier.
There are two basic designs of bags: open mouth bags and valve bags. An open mouth bag is a tube of paper plies with the bottom end sealed. The bag is filled through the open mouth and then closed by stitching, adhesive, or tape. Valve sacks have both ends closed and are filled through a valve. A typical example of a valve bag is the cement sack.