Development history of kraft paper bags

Kraft paper packaging bag is based on whole wood pulp paper. The color is divided into white kraft paper and yellow kraft paper. PP film can be applied on the paper to protect it from water. Layer, printing and bag making integration. The opening and back cover methods are divided into heat sealing, paper wrapping and edging.

When it comes to the first shopping bag for kraft paper, it was born in 1908 in St. Paul, Minnesota, USA. One local grocery store owner, Wald Duvena, has begun to look for ways to allow consumers to buy more at one time in order to boost sales. Duvina believes that it should be a pre-made bag that is low in cost and easy to use, and can bear at least about 75 pounds. After repeated experiments, he locked the texture of this bag on kraft paper because it was made from conifers with longer wood fibers, and was treated with milder caustic soda and alkali sulfide chemicals during the cooking process, making The original strength of the wood fiber is less damaged, so the final paper produced is tightly connected with the fiber, and the paper is tough and can withstand large tensile and pressure without breaking. Four years later, the first kraft paper bag for shopping was born. Its bottom is rectangular and has a larger volume than traditional V-bottom paper bags. A rope runs through its bottom and sides to increase its load-bearing capacity, and two pull loops are formed on the upper end of the paper bag for easy lifting. Duvena named the shopping bag in his own name and patented it in 1915. At this time, the annual sales volume of such shopping bags has exceeded 100 million.