阅读说明：本技术 基于cmc-na液体体系制浆造纸清洁生产的制造方法 (Manufacturing method for clean production of pulping and papermaking based on CMC-NA liquid system ) 是由 李沐谦 邹强 于 2019-03-08 设计创作，主要内容包括：本发明属于造纸领域,具体涉及一种基于CMC-NA液体体系制浆造纸清洁生产的制造方法,包括下述步骤：1)将浆板疏解后进行打浆,直至得到打浆度为38°SR的浆料；2)将步骤1)的纸浆使用蒸馏水进行稀释,得到1wt％的纸浆；置恒温加热并持续搅拌均匀,控制纸浆温度为25℃,加入CMC-NA与PVA的混合溶液；待搅拌15min后,在抄片器上成形抄片,纸页定量为609/m<Sup>2</Sup>,手抄纸页按标准测定纸性。本发明的优点在于增强了纸张的强度,对于CMC-NA和PVA混合后加入纸张的强度性能最好,比空白样的裂断长、耐破指数、撕裂指数分别提高了0.32km、0.21kPa·m2/g、0.95mN·m2/g。(The invention belongs to the field of papermaking, and particularly relates to a manufacturing method for pulping and papermaking clean production based on a CMC-NA liquid system, which comprises the following steps: 1) pulping after defibering the pulp board until pulp with the pulping degree of 38 DEG SR is obtained; 2) diluting the paper pulp obtained in the step 1) by using distilled water to obtain 1 wt% of paper pulp; heating at constant temperature and stirring continuously, controlling the temperature of paper pulp to be 25 ℃, and adding a mixed solution of CMC-NA and PVA; after stirring for 15min, forming sheet on a sheet making machine, wherein the paper sheet ration is 609/m 2 The hand sheet was tested for paperness according to the standard. The invention has the advantages that the strength of the paper is enhanced, the strength performance of the paper added with the mixture of the CMC-NA and the PVA is best, and the breaking length, the burst index and the tearing index of the paper are respectively improved by 0.32km, 0.21 kPa.m 2/g and 0.95 mN.m 2/g compared with the blank.)

1. A manufacturing method for clean production of pulping and papermaking based on a CMC-NA liquid system is characterized by comprising the following steps:

1) pulping after defibering the pulp board until pulp with the pulping degree of 38 DEG SR is obtained; collecting pulp by using a 300-mesh pulp bag, uniformly mixing the beaten pulp after squeezing, uniformly rubbing, and refrigerating to balance moisture to obtain paper pulp for later use;

2) diluting the pulp obtained in step 1) with distilled water to obtain 1 wt% pulp(ii) a Heating at constant temperature and stirring continuously, controlling the temperature of paper pulp to be 25 ℃, and adding a mixed solution of CMC-NA and PVA; after stirring for 15min, forming sheet on a sheet making machine, wherein the paper sheet ration is 609/m²The hand sheet was tested for paperness according to the standard.

2. The manufacturing method for clean production of pulping and papermaking based on CMC-NA liquid system according to claim 1, characterized in that the mixed solution of CMC-NA and PVA is prepared by the following method: adding PVA and CMC-NA into distilled water, adjusting the pH value of a reaction system to 10 by using NaOH solution, stirring uniformly, heating to 95 ℃, preserving heat for 4h, taking out and cooling to room temperature to obtain a mixed solution of the CMC-NA and the PVA.

3. The manufacturing method for clean production of pulping and papermaking based on CMC-NA liquid system according to claim 2, characterized in that the concentration of CMC-NA in distilled water is 0.5 wt% and the concentration of PVC in distilled water is 2.5 wt%.

Technical Field

The invention belongs to the field of papermaking, and particularly relates to a manufacturing method for pulping and papermaking clean production based on a CMC-NA liquid system.

Background

With the development of paper making technology, China changes the condition of producing paper by using raw pulp as a main raw material, and the proportion of paper produced by using waste paper deinked pulp is gradually increased. But after the waste paper is recycled for many times, indexes such as strength and the like of the waste paper are more and more obviously deteriorated and are changeable, so that the single dry strength agent is adopted, and the requirement for enhancing the waste paper is difficult to adapt.

Disclosure of Invention

The invention aims to provide a manufacturing method for clean production of pulping and papermaking based on a CMC-NA liquid system.

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

a manufacturing method for clean production of pulping and papermaking based on a CMC-NA liquid system comprises the following steps:

1) pulping after defibering the pulp board until pulp with the pulping degree of 38 DEG SR is obtained; collecting pulp by using a 300-mesh pulp bag, uniformly mixing the beaten pulp after squeezing, uniformly rubbing, and refrigerating to balance moisture to obtain paper pulp for later use;

2) diluting the paper pulp obtained in the step 1) by using distilled water to obtain 1 wt% of paper pulp; heating at constant temperature and stirring continuously, controlling the temperature of paper pulp to be 25 ℃, and adding a mixed solution of CMC-NA and PVA; after stirring for 15min, forming sheet on a sheet making machine, wherein the paper sheet ration is 609/m²The hand sheet was tested for paperness according to the standard.

The mixed solution of the CMC-NA and the PVA is prepared by the following method: adding PVA and CMC-NA into distilled water, adjusting the pH value of a reaction system to 10 by using NaOH solution, stirring uniformly, heating to 95 ℃, preserving heat for 4h, taking out and cooling to room temperature to obtain a mixed solution of the CMC-NA and the PVA.

The concentration of the CMC-NA in the distilled water is 0.5 wt%, and the concentration of the PVC in the distilled water is 2.5 wt%.

Compared with the prior art, the invention has the beneficial effects that:

the invention has the advantages that the strength of the paper is enhanced, which can not be achieved by the conventional mode, the paper can play a good role in propelling clean production and papermaking, the strength performance of the paper added after mixing the CMC-NA and the PVA is the best, and the breaking length, the burst index and the tearing index of the paper are respectively improved by 0.32km, 0.21 kPa.m 2/g and 0.95 mN.m 2/g compared with those of a blank sample. The CMC-NA and PVA are mixed and then pass through the electrostatic combination type ultra-high molecular polyion compound, and the compound is beneficial to effectively fixing the reinforcing agent on the surface of the fiber and can better improve the strength of the paper.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following preferred embodiments.