Waterproof recycled paper and production method thereof

Abstract

Waterproof recycled paper and production method thereof are provided by the present invention. The waterproof recycled paper utilizes waste paper and plant fiber as raw material for papermaking. The waterproof recycled paper is produced by adding waterproof additive for size mixing after beating the paper pulp in a papermaking section, wherein the waterproof additive comprises oil, resin, starch, pectin, soda pulp, sulfite pulp, sulfate pulp, polyacrylonitrile, marble powder, water-soluble high polymer and sodium hydroxide, and combining with conventional process for papermaking. Without changing paper texture, the waterproof recycled paper of the present invention has waterproof property both on an outer and an inner surface thereof. The surfaces of the paper can be written or printed. The waterproof paper of the present invention has characteristics of white color, non-toxic and no smell. The paper can be dyed to any color without damaging the waterproof property thereof. The waterproof paper of the present invention can be utilized as wrapping paper, writing paper, paper for manufacturing protective clothing or paper bag, and can be recycled and thus is an environmental friendly paper.

Description

CROSS REFERENCE OF RELATED APPLICATION[0001]This is a U.S. National Stage under 35 U.S.C. 371 of the International Application PCT / CN2014 / 072873, filed Mar. 4, 2014, which claims priority under 35 U.S.C. 119(a-d) to CN 201310297214.5, filed Jul. 16, 2013.BACKGROUND OF THE PRESENT INVENTION[0002]Field of Invention[0003]The present invention relates to a paper and a production method thereof, and more particularly to a waterproof recycled paper and production method thereof, which belongs to a field of paper and producing technique thereof.[0004]Description of Related Arts[0005]With the development of technology, the improvement of society and people's living standard, paper is widely applied in various fields and plays a variety of roles. In industries such as navigation, construction and catering, paper materials with waterproof properties are required, such as nautical chart paper, waterproof packing paper, paperboard for fast food container, paper for cups, paper for slipper, wate...

AI Technical Summary

Benefits of technology

The present invention relates to a waterproof recycled paper that has the following technical effects: 1. The paper does not lose its aesthetic appearance or writing properties because it does not have a waterproof layer coated on its surface. Instead, waterproof additives are added to the paper pulp during the production process. 2. The waterproof property is not lost when the paper is folded or rubbed multiple times because the whole paper is waterproof. 3. The paper is renewable and environmentally friendly, as it is made from plant fibers and natural materials like resin, pectin, and marble powder, which replace chemicals like waterproof glue or heavy oil. 4. The paper has waterproof properties on both its outer and inner surfaces, and can be written or printed on. 5. The paper is non-toxic, odorless, and can be used for various applications such as writing, wrapping, and manufacturing protective clothing. Additionally, it can be recycled and is cost-effective. 6. The main raw material is waste paper, which promotes resource recycling and cost advantages.

Problems solved by technology

However, since during the production process of this type of paper, heavy oil is utilized, the process of heating the material of heavy oil is needed.

Thus, operation processes are quite complicated, which increases costs of production.

Some kinds of waterproof paper produced by the conventional arts have poor waterproof performances, if the paper is frequently utilized or has frequent frictions on a surface thereof, the waterproof layer on a surface of the paper is destroyed, which even leads to the loss of waterproofing property.

Due to lack of air permeability, toughness and strength, some kinds of the waterproof paper is easily damaged and has a short service life.

Some conventional waterproof paper has waterproofing chemicals on a surface thereof, so writing and printing functions of the surface of the paper is affected.

In order to get high waterproof performance, some kinds of the waterproof paper have excessive chemicals added therein, so that environmental performance of the paper is decreased.

However, at present, waterproof recycled paper with specific waterproof properties is rarely disclosed.