阅读说明：本技术 一种有色纸纱原纸的制备方法 (Preparation method of colored paper yarn base paper ) 是由 陈君花 江峰 戴磊 周兆祥 贺瓶 王晓婉 于 2021-10-13 设计创作，主要内容包括：该发明涉及纺织工业和造纸工业的交叉技术领域,具体关于一种有色纸纱原纸的制备方法；该发明的一种有色纸纱原纸的制备方法提供一种不仅制备工艺简单、高效、安全、环保,而且在满足纸张强度性能的同时又能够赋予纸张较好颜色性能的纺织用有色线纸纱原纸的制备工艺。(The invention relates to the cross technical field of textile industry and paper industry, in particular to a preparation method of colored paper yarn base paper; the preparation method of the colored paper yarn base paper provided by the invention has the advantages that the preparation process is simple, efficient, safe and environment-friendly, and the colored paper yarn base paper for spinning can meet the strength performance of paper and endow the paper with better color performance.)

1. A preparation method of colored paper yarn base paper comprises the following operation steps:

s1: adding 0.01-0.3g of nano-cellulose with the absolute dry weight into the pulp formed by 1-3g of paper pulp, adding deionized water to 0.5-1.5L, defibering the nano-cellulose and the pulp by using a standard pulp defibering machine, stirring for a period of time to uniformly mix the nano-cellulose and the pulp, and tightly combining the nano-cellulose and fibers in the paper pulp to obtain mixed pulp;

s2: adding 0.01-1 part of dye, 0.4-1.8 parts of wet strength agent and 0.005-0.055 part of stripping agent into 50-100 parts of mixed slurry, mechanically stirring, and soaking at normal temperature for 1-6h to complete dyeing;

s3: using a paper machine to make paper from the dyed mixed slurry to obtain colored paper yarn base paper with the quantitative of 10-25 g/cm²。

2. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: the stirring speed in the S1 is 1000-.

3. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: the dye in the S2 comprises one or a mixture of more of direct sun-fast turquoise blue GL dye, direct acid-fast scarlet 4BS, direct sun-fast yellow RS, direct sun-fast black G and direct sun-fast blue B2 RL.

4. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: the dye in S2 comprises turquoise blue GL dye and direct fast yellow RS.

5. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: the preparation method of the wet strength agent in the S2 comprises the following steps: according to the parts by weight: pumping 10-22 parts of diethylenetriamine and 5-12 parts of oxalic acid into an electric heating kettle, heating to 140-;

pumping 40-50 parts of wet strength agent intermediate and 6-20 parts of propylene oxide into a synthesis kettle for reaction at the temperature of 55-70 ℃ for 2-4 hours, adding 2-5 parts of stabilizing agent and 8-30 parts of water, and continuing the reaction for 0.5-1.5 hours to obtain the wet strength agent.

6. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: the preparation method of the stripping agent in the S2 comprises the following steps: according to the parts by weight: 10-30 parts of allyl polyether, 20-41 parts of dihydroxypropanethiol, 1.5-5.3 parts of divinyl sulfone and 3-7 parts of triethylamine, introducing nitrogen, and obtaining the stripping agent after the reaction is finished.

7. The method for preparing the colored paper yarn base paper as claimed in claim 5, wherein the method comprises the following steps: the reaction temperature of the stripping agent is 60-80 ℃, and the pressure is normal pressure.

8. The method for preparing the colored paper yarn base paper as claimed in claim 5, wherein the method comprises the following steps: the preparation reaction time of the stripping agent is 1-5 h.

9. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: and in the S2, the mechanical stirring speed is 50-950r/min, and the time is 10-40 min.

10. The method for preparing the colored paper yarn base paper as claimed in claim 1, which is characterized in that: the base paper weight of the colored paper yarns in the S3 is 12-22 g/cm²。

Technical Field

The invention relates to the technical field of crossing of textile industry and paper industry, in particular to a preparation method of colored paper yarn base paper.

Background

The raw paper for paper yarn (also called paper yarn raw paper) is made up by using plant fibre as main raw material, making paper under the specific condition, cutting into paper strips, dyeing and twisting so as to obtain the invented paper yarn with different thickness for producing textile. At present, the products of paper threads in domestic markets are mainly used for weaving various styles of colorful craft weaving paper for summer hats, time-packing bags, disposable slippers, tatami, health mats and the like, and paper rope paper tape products such as paper braids, paper grass bags, colorful ropes and the like. The use requirement of the paper wire base paper determines the quality requirement of the paper wire base paper, and the paper strips are subjected to the action of composite forces such as stretching, twisting and the like in the processes of cutting into narrow-width series of bobbin paper and rolling into the paper wire after paper making, so that the base paper is required to have the characteristics of low ration, high strength and larger elongation.

CN107419577A discloses a preparation method of high-strength paper yarn base paper, which provides a preparation method of high-strength paper yarn base paper, needle wood pulp is placed in a pulper, dye is added, the pulping concentration is 3-5%, the pulping beating degree is 40-45 DEG SR, the mixture is sent to a pulp blending pool, a color fixing agent, a wet strength agent and an ionic liquid stripping agent are added, the mixture is fully mixed, slurry is sent to a net cage, and PVC chemical fiber dispersion liquid is sent to the net cage; forming into paper sheets by dehydration, uniformly attaching PVC chemical fibers on the surfaces of the paper sheets, squeezing for dehydration, and heating at 90-100 ℃ for 5-15 hours to obtain the paper yarn base paper.

CN101440588A discloses a base paper of paper yarns for textile and a preparation process thereof, which is prepared from the following raw materials in percentage by weight: 60-80% of bleached softwood kraft pulp board, 20-30% of hemp pulp or/and bamboo pulp, 3-8% of water-soluble fiber and 100% of all the components in total. The preparation process of base paper for textile paper yarns is characterized by that in the cylinder-loading procedure before winding in the paper pulp making process a glue-coating machine is used to coat glue on the film before winding so as to raise the dry and wet strength of base paper. The product of the invention has the advantages of fast water absorption, good air permeability, lightness, thinness, comfort, machine washing resistance and good twisting cutting performance, and is a reproducible environment-friendly product. The research and development of the product are innovative in China, and compared with the existing textile and papermaking related products in China, the product has pioneering development in the aspects of production methods and application. The defects of yellowing and discoloration of processed products of plant skins are fundamentally overcome, breakthrough is made in the aspects of product performance and technology, and a new high-added-value paper raw material is provided for the paper weaving industry.

However, in the prior art, the paper yarn base paper is dyed, so that the color performance of the paper yarn base paper is reduced and the problem of large color difference is easily caused in order to ensure the strength performance of the paper yarn base paper; or sacrifice the strength properties of the paper to ensure the color properties of the paper yarn base paper, including the problems of reduced tensile strength, tear strength and elongation of the paper yarn base paper.

Disclosure of Invention

The invention discloses a preparation method of colored paper yarn base paper, belonging to the cross technical field of textile industry and paper making industry. The invention aims to provide a preparation process of the base paper of the colored thread paper yarns for spinning, which has the advantages of simple preparation process, high efficiency, safety and environmental protection, meets the strength performance of paper, and endows the paper with better color performance.

A preparation method of colored paper yarn base paper is characterized by comprising the following steps:

s1: adding 0.01-0.3g of nano-cellulose with the absolute dry weight into the pulp formed by 1-3g of paper pulp, adding deionized water to 0.5-1.5L, defibering the nano-cellulose and the pulp by using a standard pulp defibering machine, stirring for a period of time to uniformly mix the nano-cellulose and the pulp, and tightly combining the nano-cellulose and fibers in the paper pulp to obtain mixed pulp;

s2: adding 0.01-1 part of dye, 0.4-1.8 parts of wet strength agent and 0.005-0.055 part of stripping agent into 50-100 parts of mixed slurry, mechanically stirring, and soaking at normal temperature for 1-6h to complete dyeing;

s3: using a paper machine to make paper from the dyed mixed slurry to obtain colored paper yarn base paper with the quantitative of 10-25 g/cm²。

Further, the stirring speed in S1 is 1000-5000r/min, and the time is 5-15 min;

further, the dye in the S2 comprises one or a mixture of more of direct sunproof turquoise blue GL dye, direct rose red FR, direct sunproof yellow RS, direct sunproof black G and direct sunproof blue B2 RL;

further, the dye in the S2 comprises turquoise blue GL dye, direct fast yellow RS;

further, the preparation method of the wet strength agent in S2 comprises the following steps: according to the parts by weight: pumping 10-22 parts of diethylenetriamine and 5-12 parts of oxalic acid into an electric heating kettle, heating to 140-;

pumping 40-50 parts of wet strength agent intermediate and 6-20 parts of propylene oxide into a synthesis kettle for reaction at the temperature of 55-70 ℃ for 2-4 hours, adding 2-5 parts of stabilizing agent and 8-30 parts of water, and continuing the reaction for 0.5-1.5 hours to obtain the wet strength agent. Further, the intermediate pressure is normal pressure;

further, the preparation method of the stripping agent in the S2 comprises the following steps: according to the parts by weight: 10-30 parts of allyl polyether, 20-41 parts of dihydroxypropanethiol, 1.5-5.3 parts of divinyl sulfone and 3-7 parts of triethylamine, introducing nitrogen, and obtaining the stripping agent after the reaction is finished;

further, the reaction temperature of the stripping agent is 60-80 ℃, and the pressure is normal pressure;

further, the preparation reaction time of the stripping agent is 1-5 h;

further, the mechanical stirring speed in the S2 is 50-950r/min, and the time is 10-40 min;

further, the basis weight of the colored paper yarn base paper in the S3 is 12-22 g/cm²。

The technical effects are as follows:

the method for preparing the colored paper yarn base paper, disclosed by the invention, has the advantages that the dyeing step after the base paper is cut into paper strips is saved by dyeing in the preparation process of the paper yarn base paper, and the characteristics of large specific surface area and multiple accessible functional groups of the nano-cellulose are utilized, the nano-cellulose is added and mixed with the plant fiber raw material in the process of preparing the paper pulp, so that the nano-cellulose is distributed in gaps or surfaces among fibers and is tightly combined with the paper pulp fibers, the binding force of the fibers is improved, and the effect of improving the strength of the paper is achieved. In addition, after the dye is added, the existence of the nano-cellulose can load more dye on the paper pulp, so that the retention rate of the dye is improved, and the color performance of the paper is improved. The invention can obviously improve the retention rate of the fine fiber and enhance the strength, the elongation and the color performance of the paper yarn base paper.

Drawings

FIG. 1 is a comparison of color density for example 1.

FIG. 2 is a comparison of color density for example 2.

FIG. 3 is a comparison of color density for example 3.

FIG. 4 is a comparison of color density for example 4.

Detailed Description

The invention is further illustrated by the following specific examples:

example 1:

weighing 0.3g of nano-cellulose with the oven dry weight, adding the nano-cellulose into 1.9g of slurry with the oven dry weight, adding water to 1L to obtain mixed slurry, defibering the mixed slurry at the speed of 3000r/min for 5min, uniformly mixing the mixed slurry, adding 0.02g of direct sun-proof turquoise blue GL dye, 0.08g of wet strength agent and 0.01g of stripping agent into the solution after uniformly mixing the slurry, mixing the mixture to obtain the dye with the concentration of 0.002%, stirring the mixture for 5min at the stirring speed of 500r/min, and uniformly mixing the dye. And then soaking and dyeing for 3h at normal temperature to dye the colored paper yarns, and using a paper machine to make paper from the dyed mixed pulp to obtain the colored paper yarn base paper.

Further, the preparation method of the wet strength agent in S2 comprises the following steps: pumping 10 parts of diethylenetriamine and 5 parts of oxalic acid into an electric kettle, heating to 140 ℃, reacting for 1 hour, and adding 30 parts of hot water with the temperature of 50 ℃ after the reaction is finished to obtain a wet strength agent intermediate;

pumping 40 parts of wet strength agent intermediate and 6-parts of epoxypropane into a synthesis kettle for reaction at the reaction temperature of 55 ℃ for 2 hours, adding 2 parts of stabilizing agent and 8 parts of water, and continuing to react for 0.5 hour to obtain the wet strength agent.

Further, the intermediate pressure is normal pressure;

the preparation method of the stripping agent comprises the following steps: 10g of allyl polyether, 20g of dihydroxypropanethiol, 1.5g of divinyl sulfone and 3g of triethylamine were reacted at 60 ℃ for 4 hours while introducing nitrogen gas, to obtain a releasing agent.

Compared with the colored paper yarn base paper prepared without adding the nano-cellulose, the colored paper yarn base paper prepared by adding the nano-cellulose has obviously improved color performance. The color difference was 3.11. The raw paper color density of the colored paper yarn without the nano-cellulose is as follows: 0.15 percent of K, 0.23 percent of C, 0.10 percent of M, 0.08 percent of Y, and the color of L88.44, a: -11.66 and b: -7.48. The color density of the colored paper yarn base paper after adding the nano-cellulose is as follows: 0.19 percent of K, 0.28 percent of C, 0.12 percent of M, 0.09 percent of Y, 86.32 percent of color, 13.41 percent of a and 8.93 percent of b. The tensile strength is increased from 10.7N to 23.24N, the tear strength is increased from 301.260mN to 793.946mN, the elongation is increased from 0.635% to 1.212%, and the strength performance is obviously improved.

Example 2:

weighing 0.2g of nano-cellulose with the oven dry weight, adding the nano-cellulose into 2.5g of slurry with the oven dry weight, adding water to 1.5L to obtain mixed slurry, defibering the mixed slurry at the speed of 5000r/min for 3min, uniformly mixing the mixed slurry, adding 0.06g of direct sun-proof turquoise blue GL dye, 0.135g of wet strength agent and 0.02g of stripping agent into the solution after uniformly mixing the mixed slurry, mixing the mixture to obtain the dye with the concentration of 0.004%, stirring the mixture for 10min at the stirring speed of 100r/min, and uniformly mixing the dye. And then soaking and dyeing for 2h at normal temperature to dye the colored paper yarns, and using a paper machine to make paper from the dyed mixed pulp to obtain the colored paper yarn base paper.

The preparation method of the wet strength agent in the S2 comprises the following steps: according to the parts by weight: pumping 14 parts of diethylenetriamine and 7 parts of oxalic acid into an electric kettle, heating to 145 ℃, reacting for 1-4 hours, and adding 30-40 parts of hot water at 50-70 ℃ after the reaction is finished to obtain a wet strength agent intermediate;

pumping 40-50 parts of wet strength agent intermediate and 6-20 parts of epoxypropane into a synthesis kettle for reaction at the reaction temperature of 55-70 ℃ for 2-4 hours, adding 3 parts of stabilizing agent and 12 parts of water, and continuing the reaction for 0.8 hour to obtain the wet strength agent.

The preparation method of the stripping agent comprises the following steps: 18g of allyl polyether, 28g of dihydroxypropanethiol, 3.2g of divinyl sulfone and 4g of triethylamine were reacted at 60 ℃ for 5 hours while passing nitrogen gas therethrough to obtain a releasing agent.

Compared with the colored paper yarn base paper prepared without adding the nano-cellulose, the colored paper yarn base paper prepared by adding the nano-cellulose has obviously improved color performance. The color difference was 2.22. The raw paper color density of the colored paper yarn without the nano-cellulose is as follows: 0.18 percent of K, 0.27 percent of C, 0.11 percent of M, 0.08 percent of Y, 86.99 percent of L, 14.46 percent of a and 9.87 percent of b. The color density of the colored paper yarn base paper after adding the nano-cellulose is as follows: 0.21 percent of K, 0.31 percent of C, 0.12 percent of M, 0.09 percent of Y, 85.68 percent of L, 15.14 percent of a and 11.53 percent of b. The tensile strength is increased from 11.18N to 20.84N, the tear strength is increased from 356.962mN to 525.636mN, the elongation is increased from 0.588% to 1.064%, and the strength performance is obviously improved.

Example 3:

weighing 0.1g of nano-cellulose with the oven dry weight, adding the nano-cellulose into 1.5g of slurry with the oven dry weight, adding water to 0.5L to obtain mixed slurry, defibering the mixed slurry at the speed of 1000r/min for 10min, uniformly mixing the mixed slurry, adding 0.015g of direct sun-proof turquoise blue GL dye, 0.1g of wet strength agent and 0.015g of stripping agent into the solution after uniformly mixing the slurry, mixing the mixture to obtain the dye with the concentration of 0.003%, stirring the mixture for 10min at the stirring speed of 900r/min, and uniformly mixing the dye. And then soaking and dyeing for 4 hours at normal temperature to dye the colored paper yarns, and using a paper machine to make paper from the dyed mixed pulp to obtain the colored paper yarn base paper.

The preparation method of the wet strength agent in the S2 comprises the following steps: according to the parts by weight: pumping 18 parts of diethylenetriamine and 9 parts of oxalic acid into an electric kettle, heating to 152 ℃, reacting for 3 hours, and adding 35 parts of hot water at 58 ℃ after the reaction is finished to obtain a wet strength agent intermediate;

pumping 46 parts of wet strength agent intermediate and 15 parts of propylene oxide into a synthesis kettle for reaction at the reaction temperature of 60 ℃ for 3 hours, adding 4 parts of stabilizing agent and 20 parts of water, and continuing the reaction for 1.2 hours to obtain the wet strength agent.

The preparation method of the stripping agent comprises the following steps: 24g of allyl polyether, 36g of dihydroxypropanethiol, 4.4g of divinyl sulfone and 5g of triethylamine were reacted at 70 ℃ for 3 hours while passing nitrogen gas therethrough to obtain a releasing agent.

The color performance of the colored paper yarn base paper prepared by adding the nano-cellulose is improved compared with the colored paper yarn base paper prepared without adding the nano-cellulose. The color difference was 0.56. The raw paper color density of the colored paper yarn without the nano-cellulose is as follows: 0.17 percent of K, 0.25 percent of C, 0.10 percent of M, 0.08 percent of Y, 87.70 percent of color L, 12.74 percent of a and 9.00 percent of b. The color density of the colored paper yarn base paper after adding the nano-cellulose is as follows: 0.18 percent of K, 0.26 percent of C, 0.11 percent of M, 0.09 percent of Y, 87.50 percent of L, 13.19 percent of a and 9.25 percent of b. The tensile strength is increased from 11N to 16.14N, the tear strength is increased from 342.056mN to 492.686mN, the elongation is increased from 0.59% to 0.87%, and the strength performance is obviously improved.

Example 4:

weighing nano-cellulose with the oven dry weight of 0.3g, adding the nano-cellulose into pulp with the oven dry weight of 2g, adding water to 1L to obtain mixed pulp, defibering the mixed pulp at the speed of 3000r/min for 5min, uniformly mixing the pulp, adding 0.1g of direct rose FR dye, 0.18g of wet strength agent and 0.025g of stripping agent into the solution after uniformly mixing the pulp, mixing the pulp and the solution to obtain the dye with the concentration of 0.01%, stirring the solution for 5min at the stirring speed of 500r/min, and uniformly mixing the dye. And then soaking and dyeing for 3h at normal temperature to dye the colored paper yarns, and using a paper machine to make paper from the dyed mixed pulp to obtain the colored paper yarn base paper.

The preparation method of the wet strength agent in the S2 comprises the following steps: according to the parts by weight: pumping 22 parts of diethylenetriamine and 12 parts of oxalic acid into an electric kettle, heating to 155 ℃, reacting for 4 hours, and adding 40 parts of hot water at 70 ℃ after the reaction is finished to obtain a wet strength agent intermediate;

pumping 50 parts of wet strength agent intermediate and 20 parts of epoxypropane into a synthesis kettle for reaction at the reaction temperature of 70 ℃ for 4 hours, adding 5 parts of stabilizing agent and 30 parts of water, and continuing the reaction for 1.5 hours to obtain the wet strength agent.

The preparation method of the stripping agent comprises the following steps: 30g of allyl polyether, 41g of dihydroxypropanethiol, 5.3g of divinyl sulfone and 7g of triethylamine were reacted at 80 ℃ for 2 hours while introducing nitrogen gas, to obtain a releasing agent.

Compared with the colored paper yarn base paper prepared without adding the nano-cellulose, the colored paper yarn base paper prepared by adding the nano-cellulose has obviously improved color performance and strength performance. The color difference was 2.96. The raw paper color density of the colored paper yarn without the nano-cellulose is as follows: 0.15 percent of K, 0.10 percent of C, 0.17 percent of M, 0.12 percent of Y, 86.56 percent of L, 9.99 percent of a and-5.98 percent of b. The color density of the colored paper yarn base paper after adding the nano-cellulose is as follows: 0.16 part of K, 0.12 part of C, 0.21 part of M, 0.13 part of Y, 85.71 parts of L, 12.82 parts of a and 6.2 parts of b. The tensile strength is increased from 8.86N to 21.58N, the tear strength is increased from 292.238mN to 517.791mN, the elongation is increased from 0.575 percent to 1.44 percent, and the strength performance is obviously improved.