A method of producing low-weight high-strength corrugated medium paper using domestic waste paper

Abstract

The invention relates to a method of using domestic waste paper to produce a low-gram-weight high-strength corrugating medium special for e-commerce, and belongs to the technical field of papermaking.The method comprises the steps of pulping and papermaking, to be specific, grading domestic waste paper with a grading screen, applying staple fibers to the corrugating medium, and adding finely-screened tailings and waste stuff from a pressure screen as well as little fine wood flour so that stiffness of the corrugating medium is improved; adding a starch and polyacrylamide bicomponent enhancerinto corrugating medium pulp to improve product strength; performing long fiber wet beating in order to decrease fiber chopping and ensure strength. In addition, an intra-pulp waterproofing and surface waterproofing integrated treatment technique is utilized, so that the water resistance of finished corrugating medium is improved; an intra-pulp flame retarding and surface flame retarding integrated technique is utilized so that the finished corrugating medium is flame retardant. The method herein is energy efficient and environmentally friendly; the produced corrugating medium has low weight,high stiffness, excellent waterproof performance and good flame retardance and is very suitable for special e-commerce cartons.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and relates to a method for manufacturing corrugated medium paper. More specifically, the invention relates to a method for producing low-grammage and high-strength corrugated medium paper by using domestic waste paper. Background technique [0002] Corrugated medium paper is the raw paper used to form the corrugated core of corrugated cardboard. It is mainly used as the corrugated core layer (middle layer) of corrugated cardboard. It plays an important role in the shockproof performance of corrugated cardboard. It can also be used alone for packaging of fragile items. Paper, corrugated cardboard (or corrugated base paper) in the inner layer of e-commerce cartons is required to have better ring compressive strength, stiffness, and water resistance. [0003] In recent years, with the continuous increase in resource recycling and the rapid development of the e-commerce market, more packaging ma...

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Problems solved by technology

[0004] In the prior art, the production of corrugated medium paper from domestic waste paper mainly has the following technical problems: (1) The quality of domestic waste paper is poorer than that of imported ones (mainly due to short fibers and low strength), and the quality of the produced corrugated medium paper is generally poor , Stiffness and other strength indicators are low. If this effect is more obvious under the current trend of low weight, it will cause damage to packaging products; (2) Due to the increase in the use of domestic waste paper, water-resistant treatment of waste paper is relatively original Wood pulp is more difficult, so the conventional internal sizing agent and surface sizing often cannot meet the water resistance requirements, resulting in poor water resistance of e-commerce cartons. In rainy days, especially in the south, the packaged products will be directly damaged or damaged. (3) At present, flame retardant technology is only used for a small amount of high-end packaging boxes or special products, such as export products, a small amount of high-end consumer goods, flammable and explosive products, military products, etc.

Generally, cartons for e-commerce are not treated with flame retardant, which is a hidden danger. Fires also occur from time to time during the transportation or storage of e-commerce boxes, such as large-scale stacking and fire hazards during transportation.

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