阅读说明：本技术 一种竹纤维绒毛浆及其制备方法和应用 (Bamboo fiber fluff pulp and preparation method and application thereof ) 是由 江国华 施宇斐 孙延芳 刘天琦 于 2021-09-16 设计创作，主要内容包括：本发明涉及一种竹纤维绒毛浆及其制备方法和应用。其制备方法包括以下步骤：(1)基础浆料的调配：室温条件下,在水中将竹纤维与木浆纤维充分均匀疏解分散,得到基础浆料；(2)纸浆的改性处理：室温条件下,将解键剂与膨松剂先后加入基础浆料中混合,并疏解均匀,得到纸浆；(3)绒毛浆的制备：将纸浆抄造成绒毛浆纸板,之后热压处理得到桨板,接着将桨板置于密封袋中平衡水分,再经机械干解离得到绒毛浆。本发明的解键剂和膨松剂的加入,保证绒毛浆填充后有良好的吸水性及垫层稳定性,两种形成协同作用,共同作用加强纤维的弱结合,提升竹纤维绒毛浆的起绒性及吸水性。(The invention relates to bamboo fiber fluff pulp and a preparation method and application thereof. The preparation method comprises the following steps: (1) blending the basic slurry: under the condition of room temperature, fully and uniformly defibering and dispersing bamboo fibers and wood pulp fibers in water to obtain basic slurry; (2) modification treatment of paper pulp: sequentially adding a debonding agent and a swelling agent into the basic slurry to be mixed at room temperature, and uniformly defibering to obtain paper pulp; (3) preparing fluff pulp: the paper pulp is made into fluff pulp paper board, then the fluff pulp paper board is obtained through hot pressing treatment, then the pulp board is placed in a sealing bag to balance moisture, and the fluff pulp is obtained through mechanical dry dissociation. The addition of the bond-breaking agent and the swelling agent ensures that the filled fluff pulp has good water absorption and cushion stability, the two forms a synergistic effect, the weak combination of fibers is enhanced under the combined action, and the raising property and the water absorption of the bamboo fiber fluff pulp are improved.)

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

(1) blending of base slurries

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

(2) modification treatment of pulp

Sequentially adding a debonding agent and a swelling agent into the basic slurry to be mixed at room temperature, and uniformly defibering to obtain paper pulp;

(3) production of fluff pulp

The paper pulp is made into fluff pulp paper board, then the fluff pulp paper board is obtained through hot pressing treatment, then the pulp board is placed in a sealing bag to balance moisture, and the fluff pulp is obtained through mechanical dry dissociation.

2. The preparation method according to claim 1, wherein the bamboo fiber is one or more of moso bamboo pulp fiber, Sasa sagittifolia bamboo pulp fiber and white bamboo charcoal fiber.

3. The method of claim 1, wherein the wood pulp fibers are selected from the group consisting of softwood fibers, masson pine fibers, larch fibers, red pine fibers, and spruce fibers.

4. The method for preparing bamboo fiber fluff pulp according to claim 1, 2 or 3, wherein in the step (1), the weight ratio of the bamboo fibers to the wood fibers is 1: 0.25-0.66, and the mass fraction of the fibers in the basic slurry is 2-3 wt%.

5. The method for preparing bamboo fiber fluff pulp according to claim 1, wherein the debonding agent is one or more of cocotrimethyl ammonium chloride, dimethyl dihydrogenated tallow ammonium chloride, aminosilane HD-M8252, aminosilane HD-M8373, and trimethyl stearyl ammonium chloride.

6. The method of claim 1, wherein the raising agent is one or more selected from the group consisting of sodium bicarbonate, ammonium carbonate, calcium carbonate, sodium borohydride, and sodium hydride.

7. The method for preparing bamboo fiber fluff pulp as claimed in claim 1, 5 or 6, wherein the amount of the debonding agent and the raising agent is 1-3 wt% of the base pulp.

8. The method for preparing bamboo fiber fluff pulp according to claim 1, wherein the heat pressing process in the step (3) comprises:

and (3) performing three-stage pressing, changing a blanket after each stage of pressing is finished, pressing the front side and the back side for 3-5 min at the pressing temperature of 100-110 ℃, and placing the pulp board in a sealing bag to balance the water for 12-18 h after the papermaking is finished.

9. Bamboo fiber fluff pulp obtained by the production method according to any one of claims 1 to 8.

10. Use of bamboo fibre fluff pulp according to claim 9, as a core layer in sanitary products.

Technical Field

The invention belongs to the technical field of fluff pulp modification, and particularly relates to bamboo fiber fluff pulp as well as a preparation method and application thereof.

Background

The fiber material filled in the pad core layer of sanitary articles such as sanitary towels, paper diapers and the like is flocculent, and has high filling power and high water absorption and is fluff pulp. The fluff pulp is used as a main raw material of disposable sanitary products, the quality of life of people is greatly improved in recent years, consumers pay more attention to the use feeling of disposable sanitary products such as diapers and sanitary towels, and the domestic demand for the fluff pulp is continuously rising. The high-grade fluff pulp sold on the market at present is almost all foreign brands, the domestic fluff pulp is relatively low in production, in recent years, the imported commodity fluff pulp mainly comprises G.P brand golden island fluff pulp, French gull brand fluff pulp, American Angel brand, Canada W.P brand and the like produced by the America Tata Pacific company, and compared with the imported commodity fluff pulp, the domestic fluff pulp is poor in filling power and poor in absorption performance. Therefore, it is necessary to deeply research the fluff-forming technology of the fluff pulp board and improve the quality of the domestic fluff pulp.

At present, most of products in the fluff pulp market take softwood fibers as raw materials, and the produced fluff pulp fibers have good performance due to the characteristics of long fiber length, large coarseness, low hemicellulose content, low impurity cell content and the like. Forest resources are relatively deficient, most domestic fluff pulp manufacturers produce fluff pulp by using non-wood and hardwood as raw materials, although the hardwood fibers are shorter than softwood fibers, and the liquid absorption capacity of the fluff pulp is greatly damaged by higher organic extract content (mainly resin). In addition, the fiber length is short, and the fiber has a large amount of hybrid cells, so that the properties of integrity, bulkiness and the like of a fluff pulp core layer are not facilitated. The bamboo pulp has high content of impure cells, and the high content of impure cells leads to the increase of the bonding strength of the pulp board, so that the pulp board has higher bursting strength, the fiber generated during dry dissociation is seriously cut, and the dust amount is large.

The area of the bamboo forest in China is second in the world, the yield of the bamboo forest is first in the world, about more than 70 genera and more than 1000 genera of bamboo plants are existed in the world, and more than 40 genera and more than 500 genera are existed in China. The bamboo has the advantages of fast growth, large biomass, short felling period, once planting, being capable of being used forever, being capable of harvesting bamboo every year without damaging bamboo forest and the like. Therefore, abundant bamboo resources in China are fully utilized, fluff pulp is manufactured, developed and utilized in a targeted manner, the tension situation that fiber raw materials for fluff pulp manufacturing are insufficient can be relieved, and the external dependence of fluff pulp manufacturing is further reduced.

Researches show that the defects caused by single bamboo fiber are improved by adding a certain content of wood pulp fiber and mixing the wood pulp fiber and the bamboo fiber, the fluffing problem and the liquid absorption performance of the fluff pulp are solved by adding a debonding agent and a swelling agent, and the fluffing performance of the fluff pulp is improved by adopting a certain pressing process in the pulp making process of a pulp board and adopting a hot pressing measure, so that the product requirements required by the fluff pulp are met.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide bamboo fiber fluff pulp and a preparation method and application thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

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

(1) blending of base slurries

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

(2) modification treatment of pulp

Sequentially adding a debonding agent and a swelling agent into the basic slurry to be mixed at room temperature, and uniformly defibering to obtain paper pulp;

(3) production of fluff pulp

The paper pulp is made into fluff pulp paper board, then the fluff pulp paper board is obtained through hot pressing treatment, then the pulp board is placed in a sealing bag to balance moisture, and the fluff pulp is obtained through mechanical dry dissociation.

The water absorption performance of single bamboo fiber is improved by mixing and defibering the bamboo fiber and the wood pulp fiber, and the water absorption time and the water absorption capacity of the mixed fiber are improved; then, the bond-breaking agent and the swelling agent are added together in sequence for modification, so that the water absorption performance of the mixed fiber is improved remarkably. Wherein, the bamboo fiber is mixed with the wood pulp fiber, the content of mixed cells in the mixed fiber is reduced, and the defects caused by single bamboo fiber are overcome.

Preferably, the bamboo fiber is one or more of moso bamboo pulp fiber, Sasa sagittifolia bamboo pulp fiber and white bamboo charcoal fiber.

Preferably, the wood pulp fiber is one or more of coniferous wood fiber, masson pine fiber, larch fiber, Korean pine fiber and spruce fiber.

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

Preferably, the bond-breaking agent is one or more of coco trimethyl ammonium chloride, dimethyl dihydrogenated tallow ammonium chloride, aminosilane HD-M8252, aminosilane HD-M8373 and trimethyl stearyl ammonium chloride.

Preferably, the leavening agent is one or more of sodium bicarbonate, ammonium carbonate, calcium carbonate, sodium borohydride and sodium hydride.

Preferably, the amount of the debonding agent and the leavening agent is 1-3 wt% of the base slurry respectively.

Preferably, in the step (3), the hot pressing process includes:

and (3) performing three-stage pressing, changing a blanket after each stage of pressing is finished, pressing the front side and the back side for 3-5 min at the pressing temperature of 100-110 ℃, and placing the pulp board in a sealing bag to balance the water for 12-18 h after the papermaking is finished.

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

The invention also provides application of the bamboo fiber fluff pulp in the scheme as a cushion core layer of a sanitary product.

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

according to the treatment method for modifying the mixed fiber by adding the debonding agent and the swelling agent, the silane debonding agent is added, and after amino functional groups in the silane debonding agent are bonded to a silicone oil skeleton, the orientation degree of organic silicon molecules on the fiber is greatly improved, the affinity to the fiber is increased, and the mixed fiber is endowed with super-softness, smoothness, and other properties; and the bonding between fibers can be effectively reduced by the debonding agent, so that dry raising of the fluff pulp board is facilitated, physical gaps between fibers are enlarged, and the tightness is naturally reduced. In addition, the hydrophobic groups in the debonding agent are arranged on the surface of the fiber, so that the smoothness of the fiber is improved, the fiber is not easy to intertwine, the sliding friction factor between the fibers is greatly reduced, the adopted solid leavening agent can also interpenetrate and adsorb the particles on the surface of the fiber, the weak combination of the fluff pulp fiber is facilitated, the fiber is easy to dissociate, soft and fluffy under the comprehensive action of the debonding agent and the leavening agent, and the water absorption performance and the fluffy degree are effectively improved.

The treatment method for modifying the mixed fiber by adding the debonding agent and the leavening agent 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. Can be used as the material of high-end sanitary products.

At present, the most of fluff pulp modification processes only add a debonding agent, but the invention simultaneously adds a leavening agent, the debonding agent and the leavening agent play an important role, and the debonding agent and the leavening agent have important influence on reducing the bursting strength of the pulp board and improving the fluffy degree of the fluff pulp. However, the reduction of hydroxyl groups after the addition of the debonder results in a decrease in fluff pulp absorbency and mat strength. The addition of the swelling agent does not change the number of hydroxyl groups, and the swelling agent only has physical change on the surface of the fluff pulp, so that the damage to the strength of the fiber is avoided, the good water absorption and cushion stability of the filled fluff pulp are ensured, the addition of the debonding agent is relatively reduced, the performance of the fluff pulp is effectively improved under the combined action of the swelling agent and the fluffy degree of the fluff pulp is improved.

The bamboo fiber absorbs moisture and is breathable, is warm in winter and cool in summer, and the cross section of the bamboo fiber is full of large and small oval pores, so that a large amount of water can be absorbed and evaporated instantly. The high hollowness of the natural cross section makes the experts in the industry call the bamboo fiber "breathable" fiber, also called "fiber queen". The moisture absorption, moisture release and air permeability of the bamboo fiber are the first of all large textile fibers, and the water absorption performance and the fluffy performance of the fluff pulp can be greatly enhanced.

The bamboo fiber belongs to non-wood fiber, can relieve the current situations of wood resource scarcity and unreasonable forest distribution in China to a certain extent, has natural antibacterial, bacteriostatic, deodorant and other properties, and has a good protection effect without adding extra antibacterial agent to fluff pulp prepared by taking the bamboo fiber as a main raw material.

Drawings

Fig. 1 is a flowchart of a method for preparing bamboo fiber fluff pulp of example 1 of the present invention.

Detailed Description

The technical solution of the present invention is further explained by the following specific examples.

Example 1

As shown in fig. 1, the preparation method of bamboo fiber fluff pulp of the embodiment includes the following steps:

s1 blending of base slurry

Under the condition of room temperature, the moso bamboo pulp fiber and the needle-leaved wood board are sheared by simple machinery, added into a standard fiber fluffer and fluffed fully and uniformly, and are subjected to 800rpm in the standard fiber fluffer to obtain basic slurry;

wherein the mass concentration of the mixed fibers in the basic slurry is 3%, and the weight ratio of the bamboo fibers to the softwood fibers is 1: 0.25.

s2 modification treatment of pulp

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 1 percent of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 2:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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

Under the condition of room temperature, adding a debonding agent of aminosilane HD-M8373 and a bulking agent of light calcium carbonate powder into the base pulp, wherein the dosage of the debonding agent of aminosilane HD-M8373 and the bulking agent of light calcium carbonate powder is 1 percent of that of the base pulp, and the modified paper pulp is obtained in a standard defibrator at 800 rpm.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 4min at the pressing temperature of 105 ℃, controlling the dryness of the pulp board obtained by papermaking to be 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 3:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the moso bamboo charcoal fiber and the needle-leaved wood board are sheared by simple machinery, added into a standard fiber fluffer and fully and uniformly fluffed, and are subjected to 800rpm in the standard fiber fluffer to obtain basic slurry;

wherein the mass concentration of the mixed fibers in the basic slurry is 2%, and the weight ratio of the moso bamboo charcoal fibers to the softwood fibers is 1: 0.25.

s2 modification treatment of pulp

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 1 percent of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 5min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 4:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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 modification treatment of pulp

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 1 percent of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 5:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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 modification treatment of pulp

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 1 percent of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 6:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 2% of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 7:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 3 percent of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 8:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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 modification treatment of pulp

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 2% of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 9:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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 modification treatment of pulp

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8252 into the basic slurry, then adding a bulking agent light calcium carbonate powder, wherein the dosage of the debonding agent aminosilane HD-M8252 and the bulking agent light calcium carbonate powder is 2% of that of the basic slurry, and performing 800rpm in a standard fiber fluffer to obtain the modified paper pulp.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 3min at the pressing temperature of 100 ℃, wherein the dryness of the pulp board obtained by papermaking is 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 10:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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

Under the condition of room temperature, adding a debonding agent aminosilane HD-M8373 into the base pulp, wherein the dosage of the debonding agent aminosilane HD-M8373 is 1 percent of that of the base pulp, and obtaining the modified paper pulp in a standard fiber fluffer at 800 rpm.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 4min at the pressing temperature of 105 ℃, controlling the dryness of the pulp board obtained by papermaking to be 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 11:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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

Under the condition of room temperature, adding light calcium carbonate serving as a swelling agent into the basic slurry, wherein the using amount of the light calcium carbonate is 1 percent of that of the basic slurry, and obtaining the modified paper pulp in a standard fiber fluffer at 800 rpm.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 4min at the pressing temperature of 105 ℃, controlling the dryness of the pulp board obtained by papermaking to be 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

Example 12:

the preparation method of the bamboo fiber fluff pulp comprises the following steps:

s1 blending of base slurry

Under the condition of room temperature, the white bamboo charcoal cotton fiber and the coniferous wood board are sheared by a simple machine, and are added into a standard fiber fluffer to be fully and uniformly fluffed, and the basic slurry is obtained in the standard fiber fluffer at 800 rpm;

wherein 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

The pulp after modification treatment was obtained in a standard defibrator at 800rpm, without adding any reagent, at room temperature.

S3 preparation of fluff pulp

And (3) a papermaking drying process, namely transferring the modified paper pulp into a fourdrinier wire for papermaking, papermaking to obtain a fluff pulp paper board, performing three-stage pressing by using a press, changing a dry blanket after each stage of pressing is finished, performing front and back pressing for 4min at the pressing temperature of 105 ℃, controlling the dryness of the pulp board obtained by papermaking to be 90-94%, placing the pulp board in a sealing bag after papermaking is finished to balance water for 12h, and performing mechanical dry dissociation to obtain the fluff pulp.

The results of the performance tests conducted on the fluff pulps prepared in examples 1 to 12 are shown in Table 1.

TABLE 1 Performance parameters of fluff pulps prepared in examples 1-12

According to the experimental results, the bamboo fiber fluff pulp and the preparation method can effectively improve the water absorption capacity and water absorption speed of single bamboo fiber after the bond-breaking agent and the swelling agent are added, solve the problem that the single bamboo fiber causes insufficient fiber strength and high fiber tightness, and the manufactured fluff pulp reaches the national standard and exceeds the national standard and can be used as a material of high-end sanitary products.

In the above embodiment and its alternatives, the time for balancing the moisture may also be 15h, 16h, 18h, etc., which is determined according to the actual situation.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.