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A kind of high-performance environment-friendly kraft box cardboard and preparation method thereof

A kraft box, high-performance technology, applied in pulp beating/finishing methods, special paper, papermaking, etc., can solve the limited effect of kraft box board, tensile strength, bursting resistance, folding resistance, and loss Large and other problems, to achieve good overall physical strength and water resistance, improve printing effects, and improve product grades

Active Publication Date: 2021-03-02
ZHEJIANG RONGSHENG PAPER IND HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology mainly improves the ring compressive strength and surface water resistance of the product through surface sizing, which has many defects: the use of surface sizing can mainly improve the surface strength and partial ring compressive strength of the product, which is beneficial to improving the overall physical strength of the product. For example, the effects of tensile strength, bursting resistance and folding resistance are limited, so the physical properties of kraft linerboard mainly produced by waste paper are limited, so a large amount of reinforcing agent needs to be added in the production process to solve this problem, and Big loss, high cost
On the other hand, the use of surface sizing has a certain effect on improving the water resistance of the surface, reducing the Cobb value of the product, but it has limited effect on improving the overall water resistance of kraft liner board
Furthermore, the use of surface sizing can improve the surface smoothness of the product to a certain extent, but it is difficult to achieve the effect of high-quality packaging and printing products

Method used

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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  • A kind of high-performance environment-friendly kraft box cardboard and preparation method thereof
  • A kind of high-performance environment-friendly kraft box cardboard and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A kind of preparation method of high-performance environment-friendly kraft liner board of the present embodiment comprises the following steps:

[0068] (1) Preparation of flame retardant styrene-acrylic latex

[0069] (a) preparation of dicyclopentenyl methacrylate

[0070] According to the ratio, add methacrylic acid, trifluoromethanesulfonic acid, and hydroquinone in sequence to the reactor 2 equipped with a stirrer, control the speed of the stirrer to 210r / min, heat up to 80°C after stirring evenly; continue to add bicyclic Pentadiene, the reaction temperature of the reaction system is controlled at 85°C, and the constant temperature reaction is 3.5h; after the reaction is completed, cool to room temperature, then add NaOH and stir for 1.5h, and the obtained material is washed, filtered, and distilled to obtain dicyclopentene methacrylate base ester. Wherein: the mass ratio of methacrylic acid, trifluoromethanesulfonic acid, hydroquinone, dicyclopentadiene and Na...

Embodiment 2

[0095] A kind of preparation method of high-performance environment-friendly kraft liner board of the present embodiment comprises the following steps:

[0096] (1) Preparation of flame retardant styrene-acrylic latex

[0097] (a) preparation of dicyclopentenyl methacrylate

[0098] According to the ratio, add methacrylic acid, trifluoromethanesulfonic acid and hydroquinone in sequence to the reactor 2 equipped with a stirrer, stir and mix under the condition of 100r / min, then heat up to 78°C, and continue to add to the reactor 2 Dicyclopentadiene was added to the mixture, mixed evenly, and then the temperature of the reaction system was raised to 90°C for 3 hours of constant temperature reaction. After the reaction was completed, it was cooled to room temperature, and NaOH was added to the obtained product, stirred for 1 hour, and finally the obtained mixture was washed and filtered. , distillation to obtain dicyclopentenyl methacrylate; wherein: the mass ratio of methacryli...

Embodiment 3

[0123] A kind of preparation method of high-performance environment-friendly kraft liner board of the present embodiment comprises the following steps:

[0124] (1) Preparation of flame retardant styrene-acrylic latex

[0125] (a) preparation of dicyclopentenyl methacrylate

[0126] According to the ratio, add methacrylic acid, trifluoromethanesulfonic acid, and hydroquinone to the reactor 2 equipped with a stirrer in sequence, stir and mix under the condition of 500r / min, then heat up to 82°C, and continue to feed the reactor 2 Dicyclopentadiene was added to the mixture, mixed evenly, and then the temperature of the reaction system was raised to 85°C for constant temperature reaction for 4 hours. After the reaction was completed, it was cooled to room temperature, and NaOH was added to the obtained product, and stirred for 2 hours. Finally, the obtained mixture was washed and filtered. , distillation to obtain dicyclopentenyl methacrylate; wherein: the mass ratio of methacry...

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Abstract

The invention discloses a high-performance environment-friendly kraft liner board, which comprises a bottom layer, a surface layer and a coating layer which are sequentially arranged from bottom to top; wherein: the bottom layer is made of modified wood flour pulp and short fiber pulp Obtain; The surface layer is made from the surface layer pulp composed of long fiber pulp and short fiber pulp; The coating layer is formed by coating the flame retardant styrene-acrylic latex on the surface layer; The long fiber pulp, The short-fiber pulp is formed by pulping domestic old corrugated boxes; the flame-retardant styrene-acrylic latex is composed of a modified composite flame retardant, functionalized modified styrene-acrylic latex and water. The invention adopts the compound flame retardant latex metering roller coating method to add the flame retardant, without loss, low cost, and the addition of the flame retardant has no adverse effect on the strength of the paper. In addition, the flame retardancy of the kraft liner board prepared by the present invention is good, because the kraft box preparation product of the present invention is produced entirely from waste paper, the process is environmentally friendly, and the functionalized modified styrene-acrylic latex is water-soluble latex without organic solvents, which improves the environmental protection.

Description

technical field [0001] The invention relates to the technical field of carton board manufacturing and processing, in particular to a high-performance environment-friendly kraft box board and a preparation method thereof. Background technique [0002] Cartonboard is the most important raw material for packaging cartons. With the improvement of people's living standards and social progress, many high-end cartons for commodity packaging need to consume a large amount of high-performance cartonboard. With the continuous development of my country's paper industry, the shortage of fiber raw materials has become a bottleneck restricting the sustainable development of the paper industry. Therefore, waste paper is widely used in container board manufacturers, which also limits the improvement of product performance. [0003] The technical problem to be solved in the present invention has the following points: [0004] 1. Solve the problem of flame retardancy of high-performance cont...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/10D21H27/30D21B1/34D21D5/02D21D1/20D21F11/00D21H21/10D21H23/56D21H21/34
CPCD21H27/10D21H27/30D21B1/345D21D5/02D21D1/20D21F11/00D21H21/10D21H23/56D21H21/34D21H11/14D21H19/58
Inventor 冯荣华冯晟宇陈建东陆晓军胡荣霞吴晓敏
Owner ZHEJIANG RONGSHENG PAPER IND HLDG
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