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Preparation method of self-adhesive and water-stable paper straw

A water-stable, self-adhesive technology, applied in pulp beating/refining methods, textiles and papermaking, papermaking, etc., can solve problems affecting beverage quality, poor water stability, fiber sticking to the mouth, etc., and achieve excellent water stability , mild conditions and simple preparation process

Active Publication Date: 2021-11-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the paper straws currently on the market still face many challenges: ① Poor water stability, fiber shedding, structural disintegration, fiber sticking to the mouth, affecting the quality of drinks, etc.
② Glue is used for bonding, and there are safety hazards such as odor or glue dissolution
[0004] In order to improve the above-mentioned problems of paper straws, some scholars have conducted a lot of research, such as polyethylene plastic film, adding waterproofing agent and coating, etc., which not only increases the cost, but also may have potential risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 600g of pine sticks, 8000mL of 10% nitric acid aqueous solution and 240g of 30% hydrogen peroxide aqueous solution were placed together in a brown glass container, mechanically stirred intermittently for 48 hours to obtain softened biomass; Take it out and filter it, wash it, add water to adjust the mass concentration of biomass to 10%, use a disc refiner to process it once at a disc spacing of 0.5mm, 0.2mm, and 0.05mm respectively, and make pulp; take 2.5g of pulp, Add water to adjust its mass concentration to 0.6%, use a paper former to filter and shape it into wet paper with a diameter of 22cm; cut the wet paper into a square, roll it into a wet paper tube with a PET rod, and air dry; place the air-dried paper tube at 150°C Oven baked for 6 hours to make self-adhesive and water-stable paper straws.

Embodiment 2

[0023] Put 1000g of bamboo sticks, 8000mL of 10% nitric acid aqueous solution and 300g of 30% hydrogen peroxide aqueous solution together in a glass container, mechanically stir intermittently for 72 hours to obtain softened biomass; take out Filter, wash, add water to adjust the mass concentration of biomass to 10%, use a disc refiner to process it once at a disc spacing of 0.5mm, 0.2mm, and 0.05mm respectively, and make pulp; take 2.5g of pulp, add water Adjust its mass concentration to 0.6%, filter and shape it into a wet paper with a diameter of 22cm using a paper former; cut the wet paper into a square, roll it into a wet paper tube with a PET rod, and air dry; place the air-dried paper tube in an oven at 150°C Bake on medium for 6 hours to make self-adhesive and water-stable paper straws.

Embodiment 3

[0025] Put 200g of eucalyptus wood strips, 5000mL of 10% nitric acid aqueous solution, and 100g of 30% hydrogen peroxide aqueous solution together in a brown glass container, and intermittently mechanically stir for 24 hours to obtain softened biomass. After taking out, filter, wash, add water to adjust the mass concentration of biomass to be 10%, use a disc refiner to process once under the disc spacing of 0.5mm, 0.2mm and 0.05mm respectively, and make pulp; take 2.5g pulp , add water to adjust its mass concentration to 0.6%, filter and shape it into a wet paper with a diameter of 22cm using a paper sheet former; cut the wet paper into a square, roll it into a wet paper tube with a PET rod, and air dry; place the air-dried paper tube at 150 ℃ oven for 6 hours to make self-adhesive and water-stable paper straws.

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Abstract

The invention discloses a preparation method of a self-adhesive and water-stable paper straw. The preparation method comprises the following steps of preparing paper pulp from biomass softened in a mixed aqueous solution of nitric acid and hydrogen peroxide, then preparing the paper pulp into a wet paper sheet, cutting the wet paper sheet into a rectangle or a square, rolling the paper sheet into a wet paper tube, and air-drying the wet paper tube; and carrying out heat treatment on the air-dried paper tube to vitrify residual lignin so as to prepare the paper straw. By means of the preparation method, the structure of the paper straw prepared by the method does not collapse after being soaked in water for more than 2 weeks, and the paper straw is completely degraded within two months after being buried in humid soil. The method is simple and convenient in process, adopted chemical reagents are easy to obtain and low in cost, the prepared paper straw has high water stability and natural degradability, and the paper straw is formed in a self-adhesion manner, free of chemical additives, green, safe and wide in application prospect in the fields of medium-and-high-end drinks, catering and the like.

Description

technical field [0001] The invention belongs to the technical field of green straws, in particular to a method for preparing self-adhesive and water-stable paper straws. Background technique [0002] Straw is a widely used disposable catering tool, widely used in beverages, milk tea, restaurants and even home life. Disposable plastic straws are widely used because of their cheap price and stable performance. However, they are not easy to be recycled due to their light weight and small size, and they may take hundreds of years to be naturally degraded in the natural environment. . Studies have shown that plastic products cannot be completely degraded, but can only be broken down into small molecules, which gradually accumulate in the environment on which we live, and even flow from land to ocean, threatening the health of humans and other organisms. On the other hand, with the rapid development of the economy and the continuous change of the concept of human life, the consu...

Claims

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Application Information

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IPC IPC(8): B31D5/00D21B1/02D21C5/00D21D1/30D21F13/00B27K5/06B27K3/32
CPCB31D5/0095D21B1/021D21C5/00D21D1/303D21F13/00B27K5/06B27K3/32Y02W30/64
Inventor 李许生董藤藤覃程荣陈卫白飞天
Owner GUANGXI UNIV
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