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High-performance environment-friendly kraft liner paperboard and preparation method thereof

A kraft box, high-performance technology, applied in pulp beating/refining method, special paper, paper, etc., can solve the problems of limiting the physical properties of kraft box board, difficulty in achieving high-quality packaging and printing products, and high cost

Active Publication Date: 2020-10-23
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

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  • High-performance environment-friendly kraft liner paperboard and preparation method thereof
  • High-performance environment-friendly kraft liner paperboard 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 paperboard 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 prepared from a bottom layer pulp consisting of modified wood powder pulp and short fiber pulp; the surface layer is prepared from a surface layer pulp consisting oflong fiber pulp and short fiber pulp; the coating layer is formed by coating flame-retardant styrene-acrylic latex on the surface layer; the long fiber pulp and the short fiber pulp are formed by pulping domestic old corrugated cartons; a flame-retardant styrene-acrylic latex is composed of a modified composite flame retardant, functionalized modified styrene-acrylic latex and water. The flame retardant is added in a composite flame-retardant latex metering roller type coating mode, loss is avoided, the cost is low, and the addition of the flame retardant has no adverse effect on the strengthof paper. Besides, the prepared kraft liner paperboard is good in flame retardance, the kraft liner preparation product is produced from full waste paper, the process is environmentally friendly, thefunctionalized modified styrene-acrylic latex is water-soluble latex, no organic solvent exists, and the environmental protection property is improved.

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

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Application Information

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Patent Type & Authority Applications(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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