The history of kraft paper bags.

As early as the 19th century, when the large-scale retail industry had not yet been born, people usually purchased all their daily necessities in the grocery store near their work or residence. Those daily necessities are packed in wooden barrels, cloth bags or wooden boxes, and after they are transported to grocery stores in bulk, how to sell them to consumers in pieces is a headache. People can only go out shopping with baskets or homemade sacks. At that time, the raw materials for papermaking were still jute fibers and old linen heads, which were of poor quality and scarce in quantity, which could not even meet the needs of newspaper printing. Around 1844, German Friedrich Kohler invented wood pulp papermaking, which greatly promoted the development of the paper industry and indirectly gave birth to the first commercial paper bag in history. In 1852, American botanist Francis Waller invented the first paper bag making machine, which was later promoted to France, Britain and other European countries. Later, the birth of plywood paper bags and the advancement of paper bag sewing technology made the cotton bags used in the transportation of bulk goods in the past replaced by paper bags.

And when it comes to the first kraft paper bag for shopping, it was born in St. Paul, Minnesota, USA in 1908. Walter Duvina, a local grocer, began looking for ways to get consumers to buy more at once in order to boost sales. According to Duvina, it should be a prefabricated bag that is cheap and easy to use, and can bear at least about 75 pounds. After much trial and error, he locked the texture of the bag on kraft paper because it was pulped from coniferous trees with long wood fibers and treated with mild caustic soda and sulfide chemicals during the cooking process, making The original strength of wood fibers is less damaged, so the final paper produced has tight connections between fibers, and the paper is tough and can withstand greater tension and pressure without breaking. Four years later, the first kraft paper bag for shopping was born. It has a rectangular bottom and has a larger volume than traditional V-bottom paper bags. A rope runs through its bottom and both sides to increase its load-bearing capacity, and forms two pull rings on the upper end of the paper bag for people to carry. Duvina named this shopping bag after himself and applied for a patent for it in 1915. At this time, the annual sales volume of this shopping bag has exceeded 100 million.