Method of using waste paper fiber to prepare flame-retardant waterproof corrugated paper packaging buffer material
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A buffer material and waste paper fiber technology, applied in the field of corrugated paper, can solve the problems of reduced paper strength performance and limited technology, and achieve the effect of increasing mechanical properties, high strength performance, and strong shear resistance.
Inactive Publication Date: 2019-03-19
马鞍山市康辉纸箱纸品有限公司
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Problems solved by technology
However, as the amount of filler added to the paper increases, the strength properties of the paper decrease due to the addition of fillers
In recent years, many studies have been carried out at home and abroad to improve the filling performance of calcium carbonate fillers, but the technology that can be applied to production practice is very limited.
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Embodiment 1
[0029] A method for preparing a flame-retardant and waterproof corrugated paper packaging cushioning material from waste paper fibers, characterized in that it comprises the following steps:
[0030] (1) Enzymatic modification of chitosan:
[0031] Add sodium acetate buffer solution to 3 parts of chitosan to prepare a chitosan solution with a concentration of 0.3%, add methanol at 1:10 to 3 parts of p-hexyloxyphenol, and mix with the chitosan solution at 40- Shake and stir in a water bath at 50°C for 5 minutes, add laccase to react for 5 hours, centrifuge for 5 minutes, add NaOH solution to precipitate, wash the precipitate with distilled water and methanol for 10 minutes, then extract with methanol for 10 hours, wash with water to remove methanol, and freeze-dry to obtain the enzyme method Modified chitosan;
[0033] Add deionized water to 10 parts of cornstarch to make a suspension with a concentr...
Embodiment 2
[0043] A method for preparing a flame-retardant and waterproof corrugated paper packaging cushioning material from waste paper fibers, characterized in that it comprises the following steps:
[0044] (1) Enzymatic modification of chitosan:
[0045]Add sodium acetate buffer solution to 5 parts of chitosan to prepare a chitosan solution with a concentration of 0.3%, add methanol at 1:10 to 5 parts of p-hexyloxyphenol, and mix with the chitosan solution at 40- Shake and stir in a water bath at 50°C for 10 minutes, add laccase to react for 6 hours, centrifuge for 10 minutes, add NaOH solution to precipitate, wash the precipitate with distilled water and methanol for 15 minutes, then extract with methanol for 12 hours, wash with water to remove methanol, and freeze-dry to obtain the enzyme method Modified chitosan;
[0047] Add deionized water to 20 parts of cornstarch to make a suspension with a concent...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention discloses a method of using waste paper fiber to prepare a flame-retardant waterproof corrugated paper packaging buffer material. The method includes: adding water into rosin, heating inwater bath while stirring, taking out for cooling after melting, adding a composite foamer into a rosin adhesive obtained, nucleating agent citric acid and plasticizer glycerin, continuously stirring, pouring in waste paper fiber paper pulp, enzyme-process modified chitosan and starch gelatinized coated modified calcium carbonate filler, continuing stirring for sufficient mixing, pouring into a mould to make a block, putting into a microwave oven for foaming, putting into a far infrared drying box for drying, and taking out to obtain a corrugated paper packaging buffer material; preparing a styrene-acrylic emulsion into a dilutent, adding a compound flame retardant and a silicon-containing water repellent agent, coating and applying glue onto the corrugated paper packaging buffer materialto control retention rate of the flame retardant and the styrene-acrylic emulsion, drying in a dryer, and allowing curing reaction in a drying box to obtain the flame-retardant waterproof corrugatedpaper packaging buffer material.
Description
technical field [0001] The invention belongs to the field of corrugated paper, and in particular relates to a method for preparing a flame-retardant and waterproof corrugated paper packaging cushioning material by using waste paper fibers. Background technique [0002] Chitosan is mainly used as an antioxidant, fruit and vegetable preservation and antibacterial agent in the food industry, and in the paper industry [0003] Can be used as sizing agent and reinforcing agent. Chitosan itself has very low antioxidant capacity, and is hygroscopic, and paper is also [0004] It is easy to absorb water and affect the mechanical properties, printing performance and dimensional stability of some packaging products. Therefore, make [0005] Enhancing the oxidation resistance and hydrophobicity of chitosan with environmentally friendly bio-enzyme modification technology, and applying it to paper processing [0006] In the process, for the development of multifunctional chitosan-bas...
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