Buffer composite packaging paper and preparation method thereof

Abstract

The invention provides buffer composite packaging paper and a preparation method thereof, belonging to the field of packaging paper. According to the buffer composite packaging paper, a foaming agent is carried by a short fiber, and is uniformly distributed in a material in a needle-like form. The needle-like foaming agent is gasified to form needle-like hollow foams taking the short fiber as a centre when discharged by extrusion die. The hollow foams are different from near-spherical holes formed by directly adding the foaming agent, needle-like air holes of a foam body are more uniform, the micro foam level is achieved, the needle-like air holes reduce the density to meet the buffer, meanwhile the distribution of the needle-like holes interweaved in a network manner increases the stiffness. The foam body produced by the preparation method is high in stiffness, stronger in anti-pressure ability, stable in size, and excellent in vibration reducing performance, so that the buffer composite packaging paper can be used for replacing traditional paperboards, honeycomb paper and the like for packaging.

Description

technical field [0001] The invention relates to the field of wrapping paper, in particular to a composite wrapping paper with cushioning function and a preparation method thereof. Background technique [0002] At present, environmental protection stone paper mainly uses plastic processing technology, adopts screw extruder, realizes high filling through coupling treatment of inorganic powder, and can be blown film or calendered to form paper. With the promotion of stone paper, its defects are gradually exposed. Its main disadvantages are: high density, lack of paper feel, and low stiffness. Especially in the field of packaging, stone paper has poor cushioning and low stiffness due to the lack of support from plant fibers. In order to expand the application of stone paper in the packaging field (such as various envelopes, cartons, paper bags, etc. for e-commerce), the problem of paper cushioning and stiffness should be solved first. [0003] Chinese invention patent CN10220...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: high density, lack of paper feeling, and low stiffness

[0005] According to the above, the density of the stone paper can be reduced by directly using the foaming agent, but because the micropores formed by the foaming agent are approximately circular, the foamed stone paper becomes soft and has poor stiffness when used for packaging cartons , especially the approximate circular holes produced by the use of foaming agents can easily lead to through-holes on the surface of the paper