阅读说明：本技术 一种竹纤维箱板纸浆的制备方法及制得的竹纤维箱板纸浆 (Preparation method of bamboo fiber boxboard paper pulp and prepared bamboo fiber boxboard paper pulp ) 是由 李文斌 于 2021-09-03 设计创作，主要内容包括：本发明提供一种竹纤维箱板纸浆的制备方法,包括：将化机竹纤维原料送入碎浆机中碎浆,碎浆机采用直径10mm孔的筛板；化机竹纤维泵送到高浓除渣器去除重杂质,然后采用磨浆机磨浆,将化机竹纤维磨到接近废纸磨前的叩解度和湿重；将得到的化机竹纤维浆泵泵送进入混合池与废纸浆充分混合,然后泵送到混合后浆池储存备用,即得竹纤维箱板纸浆。上述方案中,开发出的箱板纸新产品具有更加宽广的原料适应性,使用竹纤维量达到10～20％,代替废纸使用,减轻对废纸的依赖性,箱板纸浆制得的箱板纸产品的耐破指数最高可达到2.0,超出国家标准15％。(The invention provides a preparation method of bamboo fiber boxboard paper pulp, which comprises the following steps: feeding the bamboo fiber raw material into a pulper for pulping, wherein the pulper adopts a sieve plate with holes with the diameter of 10 mm; pumping the bamboo fibers of the chemical machine to a high-concentration slag separator to remove heavy impurities, then grinding the bamboo fibers of the chemical machine to a beating degree and wet weight which are close to those of the bamboo fibers before waste paper grinding by using a pulp grinder; pumping the obtained bamboo fiber pulp pump of the chemical mechanical pulping machine into a mixing tank to be fully mixed with the waste paper pulp, and pumping the mixture into a mixed pulp tank to be stored for later use, thereby obtaining the bamboo fiber boxboard paper pulp. In the scheme, the developed new cardboard paper product has wider raw material adaptability, the amount of the used bamboo fiber reaches 10-20%, the bamboo fiber is used instead of waste paper, the dependence on the waste paper is reduced, and the burst index of the cardboard paper product prepared from the cardboard paper pulp can reach 2.0 at most and exceeds the national standard by 15%.)

1. The preparation method of the bamboo fiber boxboard paper pulp is characterized by comprising the following steps:

feeding the bamboo fiber raw material into a pulper for pulping, wherein the pulper adopts a sieve plate with holes with the diameter of 10 mm;

pumping the bamboo fibers of the chemical machine to a high-concentration slag separator to remove heavy impurities, then grinding the bamboo fibers of the chemical machine to a beating degree and wet weight which are close to those of the bamboo fibers before waste paper grinding by using a pulp grinder;

pumping the obtained bamboo fiber pulp pump of the chemical mechanical pulping machine into a mixing tank to be fully mixed with the waste paper pulp, and pumping the mixture into a mixed pulp tank to be stored for later use, thereby obtaining the bamboo fiber boxboard paper pulp.

2. The method of preparing bamboo fiberboard pulp according to claim 1, wherein,

grinding bamboo fibers of a melting machine: the beating degree is 25-40 DEG SR; the wet weight is 3.5 to 8.5 g.

3. The method of preparing bamboo fiberboard pulp according to claim 1, wherein,

the usage amount of the chemi-mechanical bamboo fiber pulp is 10-20%, and 10-20% of the usage amount of waste paper pulp is replaced.

4. The method of preparing bamboo fiberboard pulp according to claim 1, wherein,

the pulping machine adopted in the pulping process has the grinding tooth width of 3.5-4.5 mm, the grinding tooth height of 8.0-8.5 mm, the grinding tooth groove width of 4.5-5.5 mm and the grinding disc diameter of 38-46 inches.

5. A bamboo fiber boxboard paper pulp, which is characterized by being prepared by the preparation method of the bamboo fiber boxboard paper pulp according to any one of claims 1 to 3.

Technical Field

The invention relates to the technical field of papermaking, in particular to a preparation method of bamboo fiber boxboard paper pulp and the prepared bamboo fiber boxboard paper pulp.

Background

Cardboard paper has been produced by using waste paper as a raw material to prepare pulp. However, the waste paper used as the raw material has a problem that the waste paper is dependent on the source of the waste paper, and the cardboard paper produced by using the waste paper as the raw material is not strong enough and is easy to break.

Therefore, it is imperative to use some raw materials that can replace waste paper.

Disclosure of Invention

The invention aims to provide a preparation method of bamboo fiber boxboard paper pulp, and the produced finished product paper pulp has wider raw material adaptability, so that the produced finished product paper has more raw material sources, the dependence on imported waste paper is reduced, the market change is more adapted, and the preparation method has great significance for occupying the packaging market.

In order to solve the technical problems, the invention is realized by the following technical scheme:

a preparation method of bamboo fiber boxboard paper pulp comprises the following steps:

feeding the bamboo fiber raw material into a pulper for pulping, wherein the pulper adopts a sieve plate with holes with the diameter of 10 mm; the pulping process is continuous pulping, the concentration of the pulping is 3.5-5.5%, the diameter of the sieve plate hole is 10mm, the pulp passing through the sieve plate is good pulp, and the pulp is pumped to the next procedure; the pulp can not be continuously pulped in the pulper through the sieve plate;

pumping the bamboo fibers of the chemical machine to a high-concentration slag separator to remove heavy impurities, then grinding the bamboo fibers of the chemical machine to a beating degree and a wet weight which are close to those of the waste paper pulp before grinding by adopting a pulp grinder; grinding the bamboo fibers into pulp by a chemical machine: the beating degree is 25-40 DEG SR; the wet weight is 3.5-8.5 g;

according to the characteristic that a large number of bamboo fiber coarse fiber bundles exist in a chemical machine, a pulping machine with larger pulping capacity is adopted in the pulping process, the width of a grinding tooth is about 3.5-4.5 mm, the height of the grinding tooth is about 8.0-8.5 mm, the width of a grinding tooth groove is 4.5-5.5 mm, and the diameter of the grinding disc is about 38-46 inches;

pumping the obtained bamboo fiber pulp into a mixing tank to be fully mixed with waste paper pulp, and pumping the mixed bamboo fiber pulp into a mixed pulp tank to be stored for later use; wherein the using amount of the bamboo fiber pulp of the chemical mechanical pulping machine is about 10-20% and replaces about 10-20% of the using amount of waste paper pulp. Because the strength of the bamboo fiber is superior to that of the waste paper pulp fiber, the obtained cardboard paper pulp has higher strength, and the paper bamboo fiber cardboard paper with higher strength is produced.

The technical scheme of the invention has the following beneficial effects:

in the scheme, the developed new cardboard paper product has wider raw material adaptability, the amount of the used bamboo fiber reaches 10-20%, the bamboo fiber is used instead of waste paper, the dependence on the waste paper is reduced, and the bursting index of the cardboard paper product prepared from the cardboard paper pulp exceeds the national standard, can reach 2.0 at most and exceeds the national standard by 15%.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.

With the comprehensive implementation of the national restriction measures for imported waste paper, enterprises using waste paper as raw material face the problem of raw material shortage, and the adoption of some waste paper instead of raw material is imperative. Therefore, the invention provides a method for producing a boxboard pulp by replacing waste paper pulp with bamboo fiber pulp, aiming at the problem that the waste paper pulp is excessively dependent in the existing boxboard production.

The invention adopts a brand-new machine-made bamboo fiber mixing technology, adopts machine-made bamboo fiber pulp to replace part of waste paper pulp, enables the product to have wider raw material adaptability, produces finished paper with more raw material sources, reduces the dependence on imported waste paper, and is more suitable for the change of the market. Meanwhile, the bursting index of the cardboard paper can be improved, and the effect of killing two birds with one stone is achieved.

The method for detecting the bursting index of the cardboard paper is determined according to GB/T454-2002 'determination of paper bursting strength'.

The process flow diagram of the present invention is shown in figure 1. The invention discloses a bamboo fiber pulp of a pre-grinding chemical machine: degree of beating: 8-15 DEG SR, wet weight: 7-20 g.

Example 1

The preparation method of the bamboo fiber boxboard pulp shown in figure 1 comprises the following steps:

feeding the raw material of the bamboo fiber pulp of the chemical mechanical pulping machine into a pulper for pulping, wherein the pulper adopts a sieve plate with holes with the diameter of 10 mm;

the chemical machine bamboo fiber pulp is pumped to a high-concentration slag separator to remove heavy impurities, then pulp is ground by a pulp grinder, and the chemical machine bamboo fiber pulp is ground to be close to the beating degree and wet weight before the waste paper grinding: the beating degree is about 33 degrees SR, and the wet weight is about 6 g;

according to the characteristic that a large number of bamboo fiber coarse fiber bundles exist in a chemical machine, a pulping machine with larger pulping capacity is adopted in the pulping process, the grinding tooth width is about 3.5-4.5 mm, the grinding tooth height is about 8.0-8.5 mm, the grinding tooth groove width is 4.5-5.5 mm, and the diameter of the pulping machine is about 38-46 inches.

Pumping the bamboo fiber pulp of the chemical machine into a mixing tank to be fully mixed with the waste paper pulp, and pumping the mixture into a mixed pulp tank to be stored for later use; wherein, the using amount of the bamboo fiber pulp of the chemical mechanical pulping machine is 10 percent, and 10 percent of the using amount of the waste paper pulp is replaced.

Example 2

A preparation method of bamboo fiber boxboard paper pulp comprises the following steps:

feeding the raw material of the bamboo fiber pulp of the chemical mechanical pulping machine into a pulper for pulping, wherein the pulper adopts a sieve plate with holes with the diameter of 10 mm;

the chemical machine bamboo fiber pulp is pumped to a high-concentration slag separator to remove heavy impurities, then pulp is ground by a pulp grinder, and the chemical machine bamboo fiber pulp is ground to be close to the beating degree and wet weight before the waste paper grinding: the beating degree is about 33 degrees SR, and the wet weight is about 6 g;

according to the characteristic that a large number of bamboo fiber coarse fiber bundles exist in a chemical machine, a pulping machine with larger pulping capacity is adopted in the pulping process, the grinding tooth width is about 3.5-4.5 mm, the grinding tooth height is about 8.0-8.5 mm, the grinding tooth groove width is 4.5-5.5 mm, and the diameter of the pulping machine is about 38-46 inches.

Pumping the bamboo fiber pulp of the chemical machine into a mixing tank to be fully mixed with the waste paper pulp, and pumping the mixture into a mixed pulp tank to be stored for later use; wherein, the usage amount of the bamboo fiber pulp of the chemical mechanical pulping machine is 15 percent, and 15 percent of the usage amount of the waste paper pulp is replaced.

Example 3

A preparation method of bamboo fiber boxboard paper pulp comprises the following steps:

feeding the raw material of the bamboo fiber pulp of the chemical mechanical pulping machine into a pulper for pulping, wherein the pulper adopts a sieve plate with holes with the diameter of 10 mm;

the chemical machine bamboo fiber pulp is pumped to a high-concentration slag separator to remove heavy impurities, then pulp is ground by a pulp grinder, and the chemical machine bamboo fiber pulp is ground to be close to the beating degree and wet weight before the waste paper grinding: the beating degree is about 33 degrees SR, and the wet weight is about 6 g;

according to the characteristic that a large number of bamboo fiber coarse fiber bundles exist in a chemical machine, a pulping machine with larger pulping capacity is adopted in the pulping process, the grinding tooth width is about 3.5-4.5 mm, the grinding tooth height is about 8.0-8.5 mm, the grinding tooth groove width is 4.5-5.5 mm, and the diameter of the pulping machine is about 38-46 inches.

Pumping the bamboo fiber pulp of the chemical machine into a mixing tank to be fully mixed with the waste paper pulp, and pumping the mixture into a mixed pulp tank to be stored for later use; wherein, the using amount of the bamboo fiber pulp of the chemical mechanical pulping machine is up to 20 percent, and 20 percent of the using amount of the waste paper pulp is replaced.

The boxboard pulp of the three examples was prepared into a boxboard, and the bursting index test results are shown in the following table.

	Example 1	Example 2	Example 3
				Burst index (kPa. m)2/g)	1.87	1.93	2.00

The table shows that the bamboo fiber boxboard paper pulp has wider raw material adaptability, so that finished paper has more raw material sources, the dependence on imported waste paper is reduced, the market change is more adapted, the product burst index is higher, the product quality is better, and the significance for occupying the packaging market is great.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.