CN113789680B - Bamboo fiber fluff pulp and preparation method and application thereof - Google Patents

Abstract

The invention relates to bamboo fiber fluff pulp and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparation of base slurry: under the condition of room temperature, fully and uniformly fluffing and dispersing bamboo fibers and wood pulp fibers in water to obtain basic slurry; (2) modification treatment of paper pulp: under the condition of room temperature, sequentially adding a bond-releasing agent and a leavening agent into the basic slurry, mixing, and fluffing uniformly to obtain paper pulp; (3) preparation of fluff pulp: making the paper pulp into fluff pulp paper board, performing hot pressing treatment to obtain a paddle board, placing the paddle board in a sealed bag to balance moisture, and performing mechanical dry dissociation to obtain fluff pulp. The bond-releasing agent and the bulking agent are added to ensure good water absorption and cushion stability after the fluff pulp is filled, and the two components form synergistic action to jointly strengthen the weak combination of fibers and improve the fluffing property and water absorption of the bamboo fiber fluff pulp.

Description

A kind of bamboo fiber fluff pulp and its preparation method and application

technical field

The invention belongs to the technical field of fluff pulp modification, and in particular relates to a bamboo fiber fluff pulp and its preparation method and application.

Background technique

Filled in the core layer of sanitary products such as sanitary napkins and diapers, it is in the form of cotton wool, and the fiber material with high bulkiness and high water absorption is fluff pulp. Fluff pulp is the main raw material of disposable sanitary products. In recent years, the quality of life of people has been greatly improved. Consumers pay more attention to the experience of using disposable sanitary products such as diapers and sanitary napkins. The domestic demand for fluff pulp continues to rise. At present, almost all the high-end fluff pulp sold on the market are foreign brands, and the production of domestic fluff pulp is relatively low-grade. American Angel brand and Canadian W.P brand, etc., compared with imported fluff pulp, domestic fluff pulp has poorer bulkiness and poor absorption performance. Therefore, it is necessary to further study the fluffing technology of fluff pulp board to improve the quality of domestic fluff pulp.

At present, most of the products in the fluff pulp market use coniferous wood fibers as raw materials. Because of the characteristics of long fiber length, high thickness, low hemicellulose content, and low content of miscellaneous cells, the fluff pulp fibers produced have better performance. However, forest resources are relatively scarce, and most domestic fluff pulp manufacturers use non-wood and broad-leaved wood as raw materials to produce fluff pulp. Although compared with coniferous wood fibers, broad-leaved wood fibers are shorter and have higher organic extract content (mainly resin) greatly impairs the liquid absorption capacity of fluff pulp. In addition, the short length of the fiber and the presence of a large number of miscellaneous cells are not conducive to the integrity and bulkiness of the fluff pulp core layer. The content of miscellaneous cells in bamboo pulp is high, and a large number of miscellaneous cells will increase the bonding strength of pulp boards, resulting in high bursting strength of pulp boards, resulting in severe fiber cutting and large amount of dust during dry dissociation.

my country's bamboo forest area ranks second in the world, and bamboo forest output ranks first in the world. There are more than 70 genera and more than 1,000 species of bamboo plants in the world, and my country has more than 40 genera and more than 500 species. Bamboo has the advantages of fast growth, large biomass, short felling cycle, sustainable use of one-time planting, and annual harvest of bamboo without destroying bamboo forests. Therefore, making full use of my country's rich bamboo resources and targeted development and utilization of fluff pulp production will help alleviate the tension of insufficient fiber raw materials for fluff pulp production, thereby reducing the foreign dependence of fluff pulp production.

After research, it was found that by adding a certain amount of wood pulp fiber and mixing the two to improve the defects caused by a single bamboo fiber, and by adding a debonding agent and a leavening agent to solve the fluffing problem and liquid absorption of the fluff pulp, and through A certain pressing process in the paddle board making process, hot pressing measures are taken to improve the napping property of fluff pulp, and meet the product requirements required for fluff pulp.

Contents of the invention

Aiming at the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a kind of bamboo fiber fluff pulp and its preparation method and application.

In order to realize the foregoing invention object, the present invention adopts following technical scheme:

A preparation method for bamboo fiber fluff pulp, comprising the following steps:

(1) Deployment of basic slurry

Under room temperature conditions, the bamboo fiber and wood pulp fiber are fully and evenly dispersed in water to obtain the basic slurry;

(2) Modification of pulp

Under the condition of room temperature, the debonding agent and the leavening agent are successively added to the basic slurry for mixing, and are uniformly decomposed to obtain the pulp;

(3) Preparation of fluff pulp

The pulp is made into a fluff pulp cardboard, and then heat-pressed to obtain a paddle board, and then the paddle board is placed in a sealed bag to balance the moisture, and then the fluff pulp is obtained by mechanical drying and dissociation.

The present invention improves the water-absorbing performance of single bamboo fiber by mixing and dissolving bamboo fiber and wood pulp fiber, and the water-absorbing time and water-absorbing capacity of its mixed fiber have been improved; The effect of improving the water absorption performance of the fiber is remarkable. Wherein, the bamboo fiber is mixed with the wood pulp fiber, and the mixed cell content in the mixed fiber is reduced, which overcomes the defect caused by the single bamboo fiber.

As a preferred solution, the bamboo fiber is one or more combinations of moso bamboo pulp fiber, Arthia argyi bamboo pulp fiber, and white bamboo charcoal fiber.

As a preferred solution, the wood pulp fiber is one or more combinations of coniferous wood fiber, masson pine fiber, larch fiber, red pine fiber and spruce fiber.

As a preferred solution, in the step (1), the weight ratio of bamboo fibers to wood fibers is 1:0.25-0.66, and the mass fraction of fibers in the base slurry is 2-3 wt%.

As a preferred solution, the debonding agent is cocoyl trimethyl ammonium chloride, dimethyl dihydrogenated tallow ammonium chloride, aminosilane HD-M8252, aminosilane HD-M8373, trimethyl stearyl chloride One or more combinations of ammonium chlorides.

As a preferred embodiment, the leavening agent is one or more combinations of sodium bicarbonate, ammonium bicarbonate, ammonium carbonate, calcium carbonate, sodium borohydride, and sodium hydride.

As a preferred solution, the amounts of the debonding agent and the bulking agent are respectively 1-3 wt% of the base slurry.

As a preferred version, in the step (3), the hot-pressing treatment includes:

After three stages of pressing, after each stage of pressing, change the dry blanket, press the front and back sides for 3-5 minutes, and press at a temperature of 100-110°C. After the papermaking is completed, place the paddle board in a sealed bag to balance the water for 12-18 hours.

The present invention also provides the bamboo fiber fluff pulp prepared by the preparation method described in any one of the schemes.

The present invention also provides the application of the bamboo fiber fluff pulp as described in the above scheme, as the cushion core layer of sanitary products.

Compared with the prior art, the present invention has the following technical effects:

The present invention adds a debonding agent and a bulking agent to the treatment method of the mixed fiber modification, adding a silane debonding agent, and after the amino functional group in this type of silane debonding agent is bonded to the silicone oil skeleton, the silicone oil is greatly improved. The degree of orientation of the molecules on the fibers increases the affinity for the fibers, giving the mixed fibers super soft, smooth, and other properties; and this type of debonding agent can effectively reduce the bonding between fibers, which in turn is beneficial to the fluff pulp board. Dry fleece, the physical gap between fibers becomes larger, and its tightness naturally decreases. In addition, the hydrophobic groups in the debonding agent are arranged on the surface of the fiber, which increases the smoothness of the fiber, makes it difficult for the fibers to be entangled with each other, and greatly reduces the sliding friction factor between the fibers. The solid bulking agent used It will also intersperse and adsorb its particles on the fiber surface, which is also conducive to the weak combination of fluff pulp fibers. Under the combined action of the debonding agent and the leavening agent, the fibers are easy to dissociate, soft and fluffy, effectively improving the water absorption performance and Loft.

The treatment method for modifying mixed fibers by adding a debonding agent and a leavening agent in the invention has the advantages of simple operation, easy cleaning after slurry treatment, and the like; the water absorption performance of the prepared fluff pulp is improved and reaches the national standard. It can be used as a material for high-end hygiene products.

At present, most of the fluff pulp modification process only adds a debonding agent, but the present invention adds a leavening agent at the same time. The debonding agent and the leavening agent play an important role, and they can reduce the burst resistance of the pulp board and improve the bulkiness of the fluff pulp. have an important impact. However, after the debonding agent is added, the reduction of the hydroxyl group will lead to a decrease in the absorbency and pad strength of the fluff pulp. However, the addition of leavening agent does not change the number of hydroxyl groups. It only undergoes physical changes on the surface of the fluff pulp, avoiding damage to the strength of the fiber itself, ensuring good water absorption and cushion stability after filling the fluff pulp, and relatively reducing The addition of the debonding agent and the addition of the leavening agent can effectively improve the performance of the fluff pulp and increase its bulkiness.

Bamboo fiber is moisture-absorbing and breathable, warm in winter and cool in summer. The cross-section of bamboo fiber is covered with large and small oval pores, which can absorb and evaporate a large amount of water instantly. The high hollowness of the natural cross-section makes bamboo fiber known as "breathing" fiber by industry experts, and also called "fiber queen". The hygroscopicity, hygroscopicity, and air permeability of bamboo fiber rank first among all major textile fibers, which can greatly enhance the water absorption and fluffy properties of fluff pulp.

Bamboo fiber is a non-wood fiber, which can alleviate the lack of wood resources and unreasonable forest distribution in my country to a certain extent. It has natural antibacterial, antibacterial, and deodorizing properties. The fluff pulp made from it is the main raw material. , there is no need to add additional antibacterial agents to have a better protective effect.

Description of drawings

Fig. 1 is the flow chart of the preparation method of the bamboo fiber fluff pulp of the embodiment of the present invention 1.

Detailed ways

The technical solutions of the present invention will be further explained below through specific examples.

Example 1

As shown in Figure 1, the preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature conditions, the bamboo pulp fibers and coniferous wood boards are sheared with simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the basic pulp is obtained in the standard fiber decomposer at 800rpm;

Among them, the mass concentration of mixed fibers in the basic slurry is 3%, and the weight ratio of bamboo fibers to coniferous wood fibers is 1:0.25.

S2, pulp modification

At room temperature, add the debonding agent aminosilane HD-M8252 to the basic slurry, and then add the bulking agent light calcium carbonate powder. The amount of both is 1% of the basic slurry. The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 2:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of mixed fibers in the basic slurry is 3%, and the weight ratio of white bamboo charcoal cotton fibers to softwood fibers is 1:0.25.

S2, pulp modification

At room temperature, add bond-releasing agent aminosilane HD-M8373 to the basic slurry, and then add bulking agent light calcium carbonate powder, the amount of both is 1% of the basic slurry, 800rpm in the standard fiber decomposer, The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 4 minutes. And the pressing temperature is 105°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 3:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the bamboo charcoal fiber of moso bamboo and the coniferous wood board are sheared with simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of the mixed fiber in the basic slurry is 2%, and the weight ratio of the bamboo charcoal fiber of moso bamboo to the coniferous wood fiber is 1:0.25.

S2, pulp modification

At room temperature, add the debonding agent aminosilane HD-M8252 to the basic slurry, and then add the bulking agent light calcium carbonate powder. The amount of both is 1% of the basic slurry. The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 5 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 4:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of the mixed fiber in the basic slurry is 3%, and the weight ratio of the white bamboo charcoal cotton fiber to the softwood fiber is 1:0.66.

S2, pulp modification

At room temperature, add the debonding agent aminosilane HD-M8252 to the basic slurry, and then add the bulking agent light calcium carbonate powder. The amount of both is 1% of the basic slurry. The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 5:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of the mixed fiber in the basic slurry is 3%, and the weight ratio of the white bamboo charcoal cotton fiber to the softwood fiber is 1:0.45.

S2, pulp modification

At room temperature, add the debonding agent aminosilane HD-M8252 to the basic slurry, and then add the bulking agent light calcium carbonate powder. The amount of both is 1% of the basic slurry. The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Embodiment 6:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of mixed fibers in the basic slurry is 3%, and the weight ratio of white bamboo charcoal cotton fibers to softwood fibers is 1:0.25.

S2, pulp modification

At room temperature, add bond-releasing agent aminosilane HD-M8252 to the basic slurry, and then add bulking agent light calcium carbonate powder, the amount of both is 2% of the basic slurry, 800rpm in the standard fiber decomposer, The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Embodiment 7:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of mixed fibers in the basic slurry is 3%, and the weight ratio of white bamboo charcoal cotton fibers to softwood fibers is 1:0.25.

S2, pulp modification

At room temperature, add bond-releasing agent aminosilane HD-M8252 to the basic slurry, then add bulking agent light calcium carbonate powder, the amount of both is 3% of the basic slurry, 800rpm in a standard fiber deflatter, The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Embodiment 8:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of the mixed fiber in the basic slurry is 2%, and the weight ratio of the white bamboo charcoal cotton fiber to the softwood fiber is 1:0.45.

S2, pulp modification

At room temperature, add bond-releasing agent aminosilane HD-M8252 to the basic slurry, and then add bulking agent light calcium carbonate powder, the amount of both is 2% of the basic slurry, 800rpm in the standard fiber decomposer, The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Embodiment 9:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of the mixed fiber in the basic slurry is 3%, and the weight ratio of the white bamboo charcoal cotton fiber to the softwood fiber is 1:0.45.

S2, pulp modification

At room temperature, add bond-releasing agent aminosilane HD-M8252 to the basic slurry, and then add bulking agent light calcium carbonate powder, the amount of both is 2% of the basic slurry, 800rpm in the standard fiber decomposer, The modified pulp is obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 3 minutes. And the pressing temperature is 100°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 10:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of the mixed fiber in the basic slurry is 3%, and the weight ratio of the white bamboo charcoal cotton fiber to the softwood fiber is 1:0.25.

S2. Modification treatment of pulp

At room temperature, add aminosilane HD-M8373, a debonding agent, to the basic slurry, the dosage is 1% of the basic slurry, and set it at 800 rpm in a standard fiber deflatter to obtain the modified pulp.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 4 minutes. And the pressing temperature is 105°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 11:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of mixed fibers in the basic slurry is 3%, and the weight ratio of white bamboo charcoal cotton fibers to softwood fibers is 1:0.25.

S2. Modification treatment of pulp

Under room temperature conditions, add leavening agent light calcium carbonate to the basic slurry, the consumption is 1% of the basic slurry, 800rpm in the standard fiber deflaker, obtain the pulp after the modified treatment.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 4 minutes. And the pressing temperature is 105°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

Example 12:

The preparation method of the bamboo fiber fluff pulp of the present embodiment may further comprise the steps:

S1, the deployment of basic slurry

Under room temperature, the white bamboo charcoal cotton fiber and coniferous wood board are sheared by simple machinery, and added to a standard fiber deflatter to fully and evenly decompose, and the standard fiber deflatter is 800rpm to obtain the basic slurry;

Among them, the mass concentration of mixed fibers in the basic slurry is 3%, and the weight ratio of white bamboo charcoal cotton fibers to softwood fibers is 1:0.25.

S2. Modification treatment of pulp

Under room temperature, without adding any reagent, in a standard fiber deflaker at 800 rpm, the modified pulp was obtained.

Preparation of S3, fluff pulp

In the papermaking and drying process, the modified pulp is transferred to fourdrinier papermaking, and then it is made into a fluff pulp board, which is pressed in three stages by the press. After each stage of pressing is completed, the dry felt is replaced, and the front and back sides are pressed. The pressing time is 4 minutes. And the pressing temperature is 105°C, and the dryness of the paddle board obtained by papermaking is 90-94%. After the papermaking is completed, the paddle board is placed in a sealed bag to balance the water for 12 hours, and then the fluff pulp is obtained by mechanical drying and dissociation.

The performance test of the fluff pulp prepared in Examples 1-12 is shown in Table 1.

The performance parameter of the fluff pulp that table 1 embodiment 1-12 makes

Can know by above-mentioned experimental result, adopt the bamboo fiber fluff pulp of the present invention and preparation method, can effectively improve the water absorption capacity and water absorption speed of single bamboo fiber after adding debonding agent and leavening agent, and solve the problem that single bamboo fiber causes fiber strength The problem of high fiber tightness is not enough, and the fluff pulp produced has reached and exceeded the national standard, and can be used as a material for high-end sanitary products.

In the above embodiment and its alternatives, the time for water balance may also be 15 hours, 16 hours, 18 hours, etc., which shall be determined according to actual conditions.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the scope defined in the appended claims.

Although the present invention has been described in detail and some specific examples have been cited, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present invention.

Claims (7)

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

(1) Preparation of base slurry

Under the condition of room temperature, fully and uniformly fluffing and dispersing bamboo fibers and wood pulp fibers in water to obtain basic slurry;

(2) Modification treatment of pulp

Under the condition of room temperature, sequentially adding a bond-releasing agent and a leavening agent into the basic slurry, mixing, and fluffing uniformly to obtain paper pulp;

(3) Preparation of fluff pulp

Making the paper pulp into fluff pulp paper board, performing hot pressing treatment to obtain a paddle board, placing the paddle board in a sealed bag to balance moisture, and performing mechanical dry dissociation to obtain fluff pulp;

in the step (1), the weight ratio of the bamboo fiber to the wood fiber is 1:0.25 to 0.66 percent, and the mass fraction of the fiber in the basic slurry is 2 to 3 percent;

the bond-breaking agent is at least one of aminosilane HD-M8252 and aminosilane HD-M8373;

the dosage of the bond-breaking agent is 1-3wt% of the basic sizing agent;

in the step (3), the hot pressing treatment includes:

and after three-stage pressing, the blanket is dried after each stage of pressing, the front and back sides are pressed for 3-5 min, the pressing temperature is 100-110 ℃, and the paddle board is placed in a sealing bag to balance the water for 12-18 h after the paper making is finished.

2. The method of claim 1, wherein the bamboo fibers are one or a combination of a moso bamboo pulp fiber, a arrowhead bamboo pulp fiber, and a Bai Zhuzhu carbon fiber.

3. The method of claim 1, wherein the wood pulp fibers are one or more of needle wood fibers, masson pine fibers, larch fibers, red pine fibers, spruce fibers.

4. The method of claim 1, wherein the leavening agent is one or more of sodium bicarbonate, ammonium carbonate, calcium carbonate, sodium borohydride, sodium hydride.

5. The method of producing bamboo fiber fluff pulp of claim 1 or 4, wherein the amount of the leavening agent is 1 to 3wt% of the base slurry.

6. Bamboo fiber fluff pulp produced by the method of any of claims 1-5.

7. Use of the bamboo fiber fluff pulp according to claim 6 as a core of a hygiene article.

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