Low-weight superhydrophobic package paper and preparation method thereof

A super-hydrophobic, low-quantity technology, applied in wrapping paper, wrapping paper, packaging, etc., can solve problems such as difficult to meet waterproof requirements, unstable waterproof performance, limited waterproof performance, etc., to avoid water molecule infiltration, reduce energy consumption, The effect of reducing pollution

Active Publication Date: 2020-03-31
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common methods include sizing, varnish coating, etc., and rosin glue is used for sizing, and the waterproof performance of paper is limited. Uneven coating and uneven thickness will cause unstable waterproof performance, and varnish coating can only Partially improve the waterproof performance, it is difficult to meet the increasing waterproof requirements

Method used

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  • Low-weight superhydrophobic package paper and preparation method thereof
  • Low-weight superhydrophobic package paper and preparation method thereof

Examples

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preparation example Construction

[0029] The preparation method of described low quantitative superhydrophobic wrapping paper, comprises the following steps:

[0030] (1) Preparation of mixed waxy emulsion:

[0031] First prepare 1.0-2.0 g / L CTAB (cetyltrimethylammonium bromide) solution and heat it to 75-85°C, add it to the homogenizer; mix two or more waxes with different melting points Hot-melt mixing, the heating temperature is higher than the temperature of the lowest melting point wax, lower than the temperature of the highest melting point wax, forming a part solid-part liquid state; hot-melt mixed wax is added to the above-mentioned homogenizer, controlled at 75-85 °C, Stirring speed 2000-3000 r / min, stirring time 30-60min, stop heating and continue stirring for 10-20min, stirring speed 500-800 r / min, form micron-sized waxy particle emulsion, concentration is 6-10 wt%, cool to Standby at room temperature;

[0032] (2) Wax emulsion coating:

[0033] Coat the micron-sized wax particle emulsion obtai...

Embodiment 1

[0041] A preparation method for low-weight superhydrophobic wrapping paper, comprising the steps of:

[0042] (1) Preparation of mixed waxy emulsion: first prepare 2.0 g / L CTAB solution and heat it to 85°C, then add it to the homogenizer; heat-melt and mix two or more waxes with different melting points, the heating temperature is high At the temperature of the wax with the lowest melting point, lower than the temperature of the wax with the highest melting point, a part solid-part liquid state is formed; the hot-melt mixed wax is added to the above homogenizer, controlled at 85°C, stirring speed 3000 r / min, stirring time After 60 minutes, stop heating and continue stirring for 20 minutes at a stirring speed of 800 r / min to form a micron-sized wax particle emulsion with a concentration of 10 wt%, and cool to room temperature for later use.

[0043] The wax is vegetable wax, mineral wax or synthetic wax, and the melting point temperature of the wax with the lowest melting poi...

Embodiment 2

[0049] (1) Preparation of mixed wax emulsion: first prepare 1.5 g / L CTAB solution and heat it to 80 ° C, add it to the homogenizer; heat and mix two or more waxes with different melting points, the heating temperature is high At the temperature of the wax with the lowest melting point, which is lower than the temperature of the wax with the highest melting point, a part solid-part liquid state is formed; the hot-melt mixed wax is added to the above homogenizer, controlled at 80°C, stirring speed 2500 r / min, stirring time After 60 minutes, stop heating and continue stirring for 20 minutes at a stirring speed of 650 r / min to form a micron-sized waxy particle emulsion with a concentration of 6 wt%, and cool to room temperature for later use.

[0050] The wax is vegetable wax, mineral wax or synthetic wax, and the melting point temperature of the wax with the lowest melting point is not higher than 70°C.

[0051] (2) Coating of waxy emulsion: apply the waxy emulsion obtained in ...

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Abstract

The invention relates low-weight superhydrophobic package paper and a preparation method thereof. The package paper includes: package raw paper, a hydrophobic coating layer made from low-melting-pointwax, a micron structure coating made from high-melting-point wax, and a nano-structure coating made from modified nano-SiO2. The package raw paper is respectively coated with wax emulsion and the modified SiO2 and is calendered by a soft roller. The mixed wax shows a micron-particle appearance and can fully fill the gaps between fibers in the surface of the paper; meanwhile, the hydrophobic nano-SiO2 particles fill the fibers and the mixed wax to form a hydrophobic micron-nano structure. Therefore, the hydrophobicity of the paper is enhanced, the contact angle is increased and rolling angle is reduced. The preparation method is simple in operation, is low in energy consumption and is environment-friendly, is free of fluorine containing compounds or organic solvents, and has great application prospect.

Description

technical field [0001] The invention relates to a method for making a paper packaging material, in particular to a low-quantity superhydrophobic packaging paper and a preparation method thereof. Background technique [0002] Paper is a common and indispensable substance in daily life. Superhydrophobic paper is a surface with a static contact angle of water greater than 150° and a sliding angle of less than 10°. There are many superhydrophobic phenomena in nature, including many plant leaves, poultry feathers, etc. , insect wings, etc. The surfaces of these animals and plants are not only covered with hydrophobic oils and waxes, but also have the characteristics of self-cleaning, snow-proof, and anti-corrosion. They have great application prospects in industrial production and people's daily life. [0003] The paper packaging industry is one of the fastest-growing fields in the packaging industry, has a large room for development, and has been identified as one of the most p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H27/30D21H23/56D21G1/02
CPCD21H27/10D21H27/30D21H23/56D21G1/02
Inventor 胡志军曹鑫宇张露金光范翟睿曹雨臣
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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