The kraft paper has become one of the most sought-after materials for paper bags and boxes packaging manufacturing due to its great resistance and quality and its commitment to the environmentIt is a recycled and biodegradable material.
The kraft paper bags is recyclable and ecological, it also manage to hold more weight than plastic bags, but it is biodegradable.
Currently many objects and kraft items are popular, such as kraft cards, menus, brochures, bags, gift box,etc. The commitment to the environment makes many companies and individuals bet on this type of material, providing an added value for them.
Please noted that the term ‘kraft‘ comes from German and means ‘resistance‘, so it is not surprising that this is its main characteristic. Nowadays, its aesthetics are also highly valued and it is used quite a lot in design materials, paper bags at different sizes, with handles, without handles, etc.
The manufacturing process of kraft paper is very interesting and is known as ‘fibreboarding‘ of wood pulp which involves chemically converting wood into wood pulp.
The wood of the trees is composed of the following structural components: lignin and cellulose. During the process both components are separated, for which the wood chips are boiled to form a kind of white paste made of sodium sulphide and sodium hydroxide.
In this way both components are broken and the solid wood pulp and also a kind of dark paste is left. A process of filtering and washing is followed to then produce a clean paper with no major impurities, although as is well known it has a rough surface. It does not receive any treatment to be bleached, hence its characteristic wood colour.
