阅读说明：本技术 一种防水抗静电瓦楞纸板 (Waterproof antistatic corrugated container board ) 是由 荣华 李海平 张毓华 于 2020-07-23 设计创作，主要内容包括：本发明涉及瓦楞纸加工领域,更具体地说,它涉及一种防水抗静电瓦楞纸板,其制作过包括配料、制作纸浆、制作原纸、制作纸板、纸板成型以及防水层涂料的涂刷。纸浆包括以下组分：预拌水、基础纤维素粉、添加水、功效纤维素粉、银粉、氢氧化钠、架桥剂和稳定剂。防水层涂料包括以下组分：水性聚氨酯乳液、功效纤维素粉、粘度调节用水和成膜助剂。功效纤维素粉为甘氨酸接枝纤维素,接枝率为1.5-3%。本申请纸浆制作得到的瓦楞纸板具有良好的抗静电效果；本申请纸浆制作得到的瓦楞纸板涂覆的防水涂料,能够有效的实现防水功能；本申请纸浆制作方法较为简便,得到的纸浆均一稳定,有利于后续纸张成型。(The invention relates to the field of corrugated paper processing, in particular to a waterproof and antistatic corrugated board which is manufactured by burdening, paper pulp manufacturing, raw paper manufacturing, paper board forming and waterproof layer coating brushing. The pulp comprises the following components: premixing water, basic cellulose powder, adding water, functional cellulose powder, silver powder, sodium hydroxide, bridging agent and stabilizing agent. The waterproof layer coating comprises the following components: the water-based polyurethane emulsion comprises water-based polyurethane emulsion, functional cellulose powder, water for viscosity adjustment and a film-forming aid. The functional cellulose powder is glycine grafted cellulose, and the grafting rate is 1.5-3%. The corrugated board manufactured by the paper pulp has a good antistatic effect; the waterproof coating coated on the corrugated board prepared from the paper pulp can effectively realize a waterproof function; the paper pulp manufacturing method is simple and convenient, and the obtained paper pulp is uniform and stable and is beneficial to subsequent paper forming.)

1. The waterproof and antistatic corrugated board is manufactured by mixing, manufacturing paper pulp, manufacturing base paper, manufacturing a paperboard, forming the paperboard and brushing waterproof layer paint, and is characterized in that the paper pulp comprises the following components in parts by mass:

1000 portions of premixed water and 1300 portions of premixed water;

560 portions and 630 portions of basic cellulose powder;

adding 450 parts of water and 600 parts of water;

functional cellulose powder 120-;

30-55 parts of silver powder;

110 portions and 130 portions of sodium hydroxide;

10-15 parts of a bridging agent;

5-8 parts of a stabilizer;

the waterproof layer coating is prepared by mixing the following components in parts by mass:

80-100 parts of aqueous polyurethane emulsion;

15-30 parts of functional cellulose powder;

20-50 parts of viscosity adjusting water;

1-2 parts of a film-forming assistant;

the functional cellulose powder is glycine grafted cellulose, and the grafting rate is 1.5-3%.

2. The waterproof antistatic corrugated cardboard as claimed in claim 1, wherein the base cellulose powder is prepared by the following method:

feeding corn stalks, straws and reeds into a crusher for crushing, screening the crushed corn stalks through a sieve with the diameter of 10mm, screening the crushed straws and reeds through a sieve with the diameter of 5mm, compounding the screened corn stalks, straws and reeds according to the mass ratio of (0.8-1.2) to (1.6-2.4) to obtain a mixture A, soaking the mixture A in sufficient 20% sodium hydroxide aqueous solution, heating to 70-80 ℃, reacting for 0.5-3h, and filtering to obtain filter residues according to the weight ratio of 1: (8-10), heating for 3-5min under the conditions of 1.2-1.5 times of atmospheric pressure and 140 ℃ of 120-.

3. A waterproof antistatic corrugated cardboard according to claim 2, characterized in that: the compound enzyme solution is prepared by mixing pectinase, amylase and hemicellulase according to the mass ratio of 5:9:2, wherein the enzyme activity of the pectinase is 3.0u/ml, the enzyme activity of the amylase is 6.0u/ml, and the enzyme activity of the hemicellulase is 2.5 u/ml.

4. The waterproof antistatic corrugated cardboard as claimed in claim 1, wherein the functional cellulose powder is prepared by the following method:

preparing 100 parts of solution from glycine and water according to the mass ratio (1-2) of 50, adding 20 parts of basic cellulose, heating to 70-80 ℃ at the rotating speed of 20r/min, continuing to stir for 20-25min, adding 10 parts of 85% phosphoric acid solution, continuing to stir and heat for 5-10min, dropwise adding calcium hydroxide until the solution is neutral, and then performing vacuum freeze drying to obtain solid, namely the functional cellulose powder.

5. The waterproof antistatic corrugated cardboard of claim 1, wherein: the adding water and the pre-mixing water both adopt common tap water, and the viscosity adjusting water adopts tap water after dechlorination treatment.

6. The waterproof antistatic corrugated cardboard of claim 1, wherein the waterproof layer coating is prepared by the following steps: adding the aqueous polyurethane emulsion into a stirring kettle, sequentially adding the functional cellulose powder, the water for viscosity adjustment and the film forming aid at the rotating speed of 200-300r/min, and obtaining the waterproof layer coating after 10-20 min.

7. The waterproof antistatic corrugated cardboard of claim 1, wherein: the silver powder is nano silver.

8. The waterproof antistatic corrugated cardboard of claim 1, wherein: the bridging agent is prepared by compounding ethylene glycol and 1, 4-butanediol diacrylate according to the mass ratio of 1:1.

9. The waterproof antistatic corrugated cardboard of claim 1, wherein: the stabilizer is ethylenediamine.

10. The waterproof antistatic corrugated cardboard as claimed in claim 1, wherein the preparation method of the paper pulp comprises the steps of:

s1, adding premixing water into the reaction kettle according to the material mixing table, heating to 40-50 ℃, adding functional cellulose powder, and stirring at the speed of 200-300r/min for 2-3 min;

s2, dividing the sodium hydroxide in the batching table into five equal parts, adding one of the five equal parts into a reaction kettle, heating the reaction kettle to 50-60 ℃, and stirring at the speed of 200-300r/min for 2-3 min;

s3, sequentially adding the added water, the bridging agent, the silver powder and the basic cellulose powder in the batching table into the reaction kettle, stirring for 5min at the speed of 200 plus one minute and 300r/min, adding one equal part of sodium hydroxide, continuously stirring for 5min, adding the next equal part of sodium hydroxide, and repeating the adding step until all the sodium hydroxide is added;

and S4, adding a stabilizer, and continuously stirring for 10min to obtain the paper pulp.

Technical Field

The invention relates to the field of corrugated paper processing, in particular to a waterproof and antistatic corrugated board.

Background

Corrugated cardboard is a common packaging material and can be used for manufacturing packaging boxes.

When packaging electronic products, there is often a requirement for antistatic properties on the packaging material, so many patent documents in the prior art describe improvements relating to corrugated paper or corrugated paper packaging boxes.

For example, chinese patent with patent publication No. CN102154900B discloses a method for preparing antistatic carbon fiber corrugated paper, wherein graphite with good conductive effect is added into paper pulp, and the process steps for mixing graphite in the paper pulp are correspondingly designed. For example, the Chinese patent with patent No. CN102535257B discloses a method for producing moisture-proof antistatic cartons, wherein graphite fibers and other auxiliary materials are added in the formula of paper pulp raw materials, and the base paper obtained by the method and the finally manufactured corrugated boards have strong antistatic performance.

The packaging material often has a requirement for waterproof performance, and most manufacturers can apply waterproof paint on the corrugated board to waterproof the packaging material.

As is well known, metals have good conductivity, and there are reports on using metal particles to reduce the resistance of materials in the technical fields of electromagnetic shielding films, engineering plastics, antistatic coatings, etc., for example, chinese patent publication No. CN105860848A discloses an antistatic coating for a measuring cabinet, copper powder is added in the coating, and further, chinese patent publication No. CN103289251A discloses an antistatic PVC plastic and a preparation method thereof, and certain metal powder is added in the formula to reduce the surface resistance of the materials.

However, in the field of papermaking, no related technical scheme and literature report of adding metal powder into paper pulp exists, which is mainly because the metal powder and graphite powder have different properties, and the addition of the metal powder into the paper pulp can reduce the strength of finally obtained paper, and can not meet the basic requirements for manufacturing corrugated boards any more. In addition, although the coating of corrugated cardboard is a technique commonly used by those skilled in the art, for example, patent document No. CN107022926B discloses a process for coating antistatic coating on the surface of corrugated cardboard, but the insufficient adhesion between the coating and the cardboard causes the coating to be easily scraped off, and thus the function of the coating cannot be well realized. The paint which has an antistatic function and a waterproof function and has good adhesive force with the corrugated board is difficult to find in the market, and the corrugated board is thickened by using a double-coating method, so that the corrugated board loses light and thin texture. In summary, it is difficult to obtain a corrugated paper packaging material with good waterproof performance and good antistatic performance by some methods in the prior art.

In view of the above, there is a need to design a waterproof and antistatic corrugated board, which overcomes the above technical difficulties in the corrugated paper processing field.

Disclosure of Invention

An object of the application is to provide a waterproof antistatic corrugated container board, this kind of cardboard use metal powder as the batching of paper pulp, and the cardboard intensity that final machine-shaping obtained is better, and the waterproof coating of coating and corrugated container board bonding are better, can be waterproof effectively.

The technical purpose of the application is realized by the following technical scheme: the waterproof and antistatic corrugated board is manufactured by mixing, manufacturing paper pulp, manufacturing base paper, manufacturing a paperboard, forming the paperboard and brushing a waterproof layer, and is characterized in that the paper pulp comprises the following components in parts by mass:

1000 portions of premixed water and 1300 portions of premixed water;

560 portions and 630 portions of basic cellulose powder;

adding 450 parts of water and 600 parts of water;

functional cellulose powder 120-;

30-55 parts of silver powder;

110 portions and 130 portions of sodium hydroxide;

10-15 parts of a bridging agent;

5-8 parts of a stabilizer;

the functional cellulose powder is glycine grafted cellulose, and the grafting rate is 1.5-3%;

the waterproof layer coating is prepared by mixing the following components in parts by mass:

80-100 parts of aqueous polyurethane emulsion;

15-30 parts of functional cellulose powder;

20-50 parts of viscosity adjusting water;

1-2 parts of a film-forming assistant.

By adopting the technical scheme, the basic cellulose powder and the functional cellulose powder are main substances of paper pulp, the silver powder is used as a filler of the paper pulp, the surface resistance of the fiber can be reduced, and the bridging agent is mainly beneficial to forming a cellulose three-stage structure in the paper pulp, so that a plurality of celluloses with different lengths are mutually crosslinked and folded, and the bonding property of the corrugated paper original paperboard is further enhanced. The stabilizer mainly plays a role in degrading the total hardness in the water body, and is beneficial to obtaining the corrugated original paper board with better quality. However, the strength of paper is insufficient due to the addition of excessive fillers, the technical defect is overcome by applicants, glycine grafted cellulose with the grafting rate of 1.5-3% is adopted as functional cellulose, and the functional cellulose can greatly reduce the influence of the fillers on the final paper, mainly because amino groups on the glycine can enable the fillers to be better adsorbed to the surface of the fiber, the influence of the fillers on the fiber structure forming in the paper forming process is reduced, and the strength of the whole fiber structure is further ensured when the paper pulp is formed. In the waterproof layer coating, the filler is functional cellulose instead of kaolin, calcium carbonate and other fillers commonly used in the coating field, which is also a technical improvement for better bonding the waterproof layer coating with corrugated boards.

Preferably, the base cellulose powder is prepared by the following method:

feeding corn stalks, straws and reeds into a crusher for crushing, screening the crushed corn stalks through a sieve with the diameter of 10mm, screening the crushed straws and reeds through a sieve with the diameter of 5mm, compounding the screened corn stalks, straws and reeds according to the mass ratio of (0.8-1.2) to (1.6-2.4) to obtain a mixture A, soaking the mixture A in sufficient 20% sodium hydroxide aqueous solution, heating to 70-80 ℃, reacting for 0.5-3h, and filtering to obtain filter residues according to the weight ratio of 1: (8-10), heating for 3-5min under the conditions of 1.2-1.5 times of atmospheric pressure and 140 ℃ of 120-.

By adopting the technical scheme, the corn stalks have more coarse and short fibers, the straws and the reeds have more long fibers, and the basic cellulose powder prepared from the raw materials and the mixture ratio has proper proportion of the long fibers and the short fibers, so that paper with higher strength can be formed. The main purpose that sieves after the raw materials are broken is to standardize the whole powder process, and cellulose is difficult to extract from relatively thick fragments, so the raw materials need to be used after being screened. The cooking process and the complex enzyme treatment process are both used for removing impurities except cellulose and improving the quality of basic cellulose, the inactivation of the complex enzyme is used for avoiding the influence of the complex enzyme on the subsequent processing process, the mixture is dried and then crushed into 200-mesh and 250-mesh powder, and thus the base paper prepared from the basic cellulose powder with the fineness is fine enough and cannot be used due to too coarse influence.

Preferably, the complex enzyme solution is prepared by mixing pectinase, amylase and hemicellulase according to a mass ratio of 5:9:2, wherein the enzyme activity of the pectinase is 3.0u/ml, the enzyme activity of the amylase is 6.0u/ml, and the enzyme activity of the hemicellulase is 2.5 u/ml.

By adopting the technical scheme, pectin, starch and hemicellulose are main impurities in the raw materials, pectinase can decompose pectin in the raw materials, amylase can decompose starch in the raw materials, hemicellulase can mainly decompose hemicellulose in the raw materials, and the enzyme activity and the proportion in the complex enzyme solution are selected according to the content of each impurity in the raw materials.

Preferably, the functional cellulose powder is prepared by the following method:

preparing 100 parts of solution from glycine and water according to the mass ratio (1-2) of 50, adding 20 parts of basic cellulose, heating to 70-80 ℃ at the rotating speed of 20r/min, continuing to stir for 20-25min, adding 10 parts of 85% phosphoric acid solution, continuing to stir and heat for 5-10min, dropwise adding calcium hydroxide until the solution is neutral, and then performing vacuum freeze drying to obtain solid, namely the functional cellulose powder.

By adopting the technical scheme, the glycine and the hydroxyl on the basic cellulose can be subjected to esterification reaction to prepare the glycine grafted cellulose, at the moment, free amino groups exist in the glycine grafted cellulose, the amino groups are favorable for cellulose to adsorb the filler, and the calcium hydroxide is selected to adjust the solution appearance because calcium ions and phosphate ions can form calcium phosphate precipitate, so that the calcium phosphate precipitate particles are extremely tiny, and the calcium phosphate is heat-resistant and can be adhered to the cellulose to be favorable for improving the flame retardance of paper.

Preferably, the added water and the ready-mixed water are both common tap water, and the viscosity adjusting water is tap water subjected to dechlorination treatment.

By adopting the technical scheme, the common tap water has wide sources and low price, and can meet the use requirements of papermaking, and the viscosity adjusting water needs to be the tap water subjected to dechlorination treatment, mainly because chloride ions have influence on the film-forming property and cannot be removed by adding certain auxiliaries.

Preferably, the water polyurethane emulsion is added into a stirring kettle, the functional cellulose powder, the viscosity adjusting water and the film forming assistant are sequentially added at the rotating speed of 200-300r/min, and the waterproof layer coating is obtained after 10-20 min.

By adopting the technical scheme, the method can obtain uniform and stable waterproof layer coating, and an effective waterproof layer can be formed by coating the waterproof layer coating on the corrugated board.

Preferably, the silver powder is nano silver.

By adopting the technical scheme, the nano-silver can reduce the surface resistance of the corrugated board, has the sterilization effect, and has a better packaging effect on articles needing to be stored and packaged for a long time.

Preferably, the bridging agent is prepared by compounding ethylene glycol and 1, 4-butanediol diacrylate according to the mass ratio of 1:1.

By adopting the technical scheme, the bridging agent in the proportion is suitable for the formula of the invention, and is beneficial to improving the mechanical property of the base paper. Polyethylene glycol is capable of forming a number of ether linkages with cellulose and linking different celluloses together. 1, 4-butanediol diacrylate can form a certain displacement reaction, the chain length is short, and both ends of the butanediol diacrylate can be connected with the same cellulose molecule to enhance the tear resistance of the cellulose molecule.

Preferably, the stabilizer is ethylenediamine.

By adopting the technical scheme, the ethylenediamine can form chelate with free silver, so that the overall environment of the paper pulp is more stable.

Preferably, the preparation method of the pulp comprises the following steps:

s1, adding premixing water into the reaction kettle according to the material mixing table, heating to 40-50 ℃, adding functional cellulose powder, and stirring at the speed of 200-300r/min for 2-3 min;

s2, dividing the sodium hydroxide in the batching table into five equal parts, adding one of the five equal parts into a reaction kettle, heating the reaction kettle to 50-60 ℃, and stirring at the speed of 200-300r/min for 2-3 min;

s3, sequentially adding water, a bridging agent, ferroferric oxide, silver powder and basic cellulose powder in a material mixing table into a reaction kettle, stirring for 5min at the speed of 200-300r/min, adding an equal part of sodium hydroxide, continuously stirring for 5min, adding the next equal part of sodium hydroxide, and repeating the adding step until all the sodium hydroxide is added;

and S4, adding a stabilizer, and continuously stirring for 10min to obtain the paper pulp of the flame-retardant antistatic corrugated paper.

By adopting the technical scheme, the dissolution of the cellulose powder can be accelerated by heating and stirring in the step S1, and the whole formula solution can be uniformly stirred by a longer stirring time in the steps S2, S3 and S4.

In summary, the present application includes at least one of the following beneficial technical effects:

firstly, the corrugated board manufactured by the paper pulp has a good antistatic effect;

secondly, the waterproof coating coated on the corrugated board manufactured by the paper pulp can effectively realize a waterproof function;

thirdly, the paper pulp manufacturing method is simple and convenient, and the obtained paper pulp is uniform and stable and is beneficial to subsequent paper forming.

Detailed Description

The present application will be described in detail with reference to examples.