阅读说明：本技术 一种具有增强作用的造纸用填料 (Papermaking filler with reinforcing effect ) 是由 韦丹 章松 于 2020-12-30 设计创作，主要内容包括：本发明涉及一种具有增强作用的造纸用填料。按照以下工艺步骤进行：将传统造纸用填料与瓜尔胶、淀粉、缩甲基纤维素原料充分混合均匀后,再按照制备造纸用瓜尔胶、造纸用淀粉、生产缩甲基纤维素的工艺进行生产,制得的具有增强作用的造纸用填料。本发明在传统造纸填料生产技术或是冲泡工艺条件下,制备完成造纸用填料后,以制备好的造纸用填料替代传统造纸用增强剂合成工艺中所需用的水,即将制备好的造纸用填料直接替代水,参予到增强剂的合成工艺中,以造纸用填料颗粒为载体,在造纸用填料颗粒表面实现增强剂的合成。因为增强剂完全是以填料颗粒为核心,在填料表面进行的合成,从而实现了增强剂完全包裹住造纸填料,当该造纸用填料添加在纸页中时,其表面的增强剂与纤维充分结合,从而实现纸张加填与增强的双重功效。(The invention relates to a filler for papermaking with a reinforcing effect. The method comprises the following steps: the filler for papermaking with the reinforcing function is prepared by fully and uniformly mixing the traditional filler for papermaking with guar gum, starch and the raw materials of the reduced methyl cellulose, and then producing according to the processes of preparing the guar gum for papermaking, the starch for papermaking and producing the reduced methyl cellulose. The invention is characterized in that under the condition of the traditional papermaking filler production technology or brewing process, after the papermaking filler is prepared, the prepared papermaking filler is used for replacing water required in the traditional papermaking reinforcing agent synthesis process, namely, the prepared papermaking filler is directly used for replacing water and is added into the reinforcing agent synthesis process, the papermaking filler particles are used as carriers, and the reinforcing agent is synthesized on the surfaces of the papermaking filler particles. Because the reinforcing agent is completely synthesized on the surface of the filler by taking the filler particles as the core, the reinforcing agent completely wraps the papermaking filler, and when the papermaking filler is added into paper, the reinforcing agent on the surface of the papermaking filler is fully combined with fibers, so that double effects of filling and reinforcing the paper are realized.)

1. The filler with the reinforcing effect for papermaking is characterized by comprising the following process steps: the filler for papermaking with the reinforcing function is prepared by fully and uniformly mixing the traditional filler for papermaking with guar gum, starch and the raw materials of the reduced methyl cellulose, and then producing according to the processes of preparing the guar gum for papermaking, the starch for papermaking and producing the reduced methyl cellulose.

2. A paper making filler with reinforcing effect as claimed in claim 1, characterized in that the conventional paper making filler production process comprises: GCC grinding process and PCC synthesis process;

the GCC grinding process comprises the following steps: after GCC grinding, the grain size of GCC is controlled to be between C30 and C99, and the solid content of GCC ground is controlled to be between 10 and 80 percent;

the PCC synthesis process comprises the following steps: the crystal form after the synthesis of the PCC can be a spindle type, can also be one of various structures such as a needle shape and the like, or can be a mixed type with various structures, and the solid content is controlled to be 10-50% after the synthesis of the PCC is finished.

3. The papermaking filler with reinforcing effect as claimed in claim 2, wherein the grain size of GCC after grinding is controlled to be between C40-C75, and the solid content after grinding is controlled to be between 30-50%.

4. The papermaking filler with a reinforcing effect according to claim 2, wherein the solid content is controlled to be 15-30% after the synthesis of PCC is completed.

5. The papermaking filler with reinforcing effect as claimed in claim 1, wherein the brewing process of the papermaking filler mainly comprises: brewing process of talcum powder, brewing process of titanium dioxide, brewing process of bentonite and brewing process of partial dry powder GCC and dry powder PCC.

6. The papermaking filler with the reinforcing effect according to claim 5, wherein the solid content of the talcum powder after being brewed is controlled to be 5-50%, preferably 10-30%.

7. The papermaking filler with the reinforcing effect according to claim 5, wherein the content of solids after the titanium dioxide is brewed is controlled to be 1-50%, preferably 10-30%.

8. The papermaking filler with the reinforcing effect according to claim 5, wherein the content of solids after brewing of bentonite is controlled to be 1-30%, preferably 5-15%.

Technical Field

The invention relates to a papermaking filler with a reinforcing effect, and belongs to the technical field of papermaking.

Background

The fillers currently used in the paper industry mainly include: inorganic minerals such as GCC (ground calcium carbonate), PCC (light calcium carbonate), talc, bentonite, and titanium dioxide.

When the papermaking filler is applied, the following problems can be avoided except that special functions can be given to paper (for example, calcium carbonate can reduce the production cost, titanium dioxide can improve the opacity of the paper, and the like): 1. the addition amount of the filler is increased, the paper ash content is improved, and the paper strength is inevitably reduced. 2. The use of the papermaking filler inevitably reduces the retention rate of the system, improves the concentration of the white water system and increases the load of the water system. 3. The application of the papermaking filler reduces the paper strength, the operation performance of the paper feeder generates certain negative effects, the paper breaking times are increased, and the operation efficiency is reduced.

Disclosure of Invention

Aiming at the defects, the invention provides the papermaking filler with the reinforcing effect, so that the problem of application of the filler can be solved, the using amount of the filler is increased, the production cost of a papermaking enterprise is reduced, and meanwhile, the natural ecological resources are protected.

The technical scheme adopted by the invention is as follows: the papermaking filler with the reinforcing effect is prepared according to the following process steps: the filler for papermaking with the reinforcing function is prepared by fully and uniformly mixing the traditional filler for papermaking with guar gum, starch and the raw materials of the reduced methyl cellulose, and then producing according to the processes of preparing the guar gum for papermaking, the starch for papermaking and producing the reduced methyl cellulose.

Further, the production process of the conventional filler for papermaking comprises the following steps: GCC grinding process and PCC synthesis process;

the GCC grinding process comprises the following steps: after GCC grinding, the grain size of GCC is controlled to be between C30 and C99, and the solid content of GCC ground is controlled to be between 10 and 80 percent;

the PCC synthesis process comprises the following steps: the crystal form after the synthesis of the PCC can be a spindle type, can also be one of various structures such as a needle shape and the like, or can be a mixed type with various structures, and the solid content is controlled to be 10-50% after the synthesis of the PCC is finished.

Furthermore, after GCC grinding, the grain diameter of GCC is controlled to be between C40 and C75, and the solid content of GCC ground is controlled to be between 30 and 50 percent.

Further, after the synthesis of the PCC is finished, the solid content is controlled to be 15-30%.

Further, the brewing process of the paper filler mainly comprises the following steps: brewing process of talcum powder, brewing process of titanium dioxide, brewing process of bentonite and brewing process of partial dry powder GCC and dry powder PCC.

Furthermore, the solid content of the talcum powder after brewing is controlled to be 5-50%, and preferably 10-30%.

Furthermore, the solid content of the brewed titanium dioxide is controlled to be 1-50%, preferably 10-30%.

Furthermore, the solid content of the brewed bentonite is controlled to be 1-30%, preferably 5-15%.

The invention has the advantages that: the invention is characterized in that under the condition of the traditional papermaking filler production technology or brewing process, after the papermaking filler is prepared, the prepared papermaking filler is used for replacing water required in the traditional papermaking reinforcing agent synthesis process, namely, the prepared papermaking filler is directly used for replacing water and is added into the reinforcing agent synthesis process, the papermaking filler particles are used as carriers, and the reinforcing agent is synthesized on the surfaces of the papermaking filler particles. Because the reinforcing agent is completely synthesized on the surface of the filler by taking the filler particles as the core, the reinforcing agent completely wraps the papermaking filler, and when the papermaking filler is added into paper, the reinforcing agent on the surface of the papermaking filler is fully combined with fibers, so that double effects of filling and reinforcing the paper are realized.

Detailed Description

The main technical route of the papermaking filler with the reinforcing effect is as follows: 1. under the conditions of the traditional papermaking filler production technology or brewing process, after the papermaking filler is prepared, the prepared papermaking filler is used for replacing water required in the traditional papermaking reinforcing agent synthesis process, namely the prepared papermaking filler is used for directly replacing water, and the reinforcing agent is synthesized on the surface of the papermaking filler particles by taking the papermaking filler particles as a carrier in the reinforcing agent synthesis process. Because the reinforcing agent is completely synthesized on the surface of the filler by taking the filler particles as the core, the reinforcing agent completely wraps the papermaking filler, and when the papermaking filler is added into paper, the reinforcing agent on the surface of the papermaking filler is fully combined with fibers, so that double effects of filling and reinforcing the paper are realized.

2. The filler for papermaking with the reinforcing function is prepared by fully and uniformly mixing the traditional filler for papermaking with guar gum, starch and the raw materials of the reduced methyl cellulose, and then producing according to the processes of preparing the guar gum for papermaking, the starch for papermaking and producing the reduced methyl cellulose.

The traditional papermaking filler production technology mainly comprises the following steps: GCC grinding process and PCC synthesis process. The GCC grinding process further describes that after GCC grinding, the grain size of GCC is controlled to be between C30-C99, preferably C40-C75, (C30 means that the proportion of calcium carbonate particles below 2um reaches 30%, C99 means that the proportion of calcium carbonate particles below 2um reaches 90%, and the like). The solid content of the ground GCC is controlled to be 10-80%, preferably 30-50%. The PCC synthesis process is further explained, the crystal form after the PCC synthesis can be a spindle type, can also be one of a plurality of structures such as a needle shape and the like, or a mixed type of a plurality of structures, and the solid content is controlled to be 10-50%, preferably 15-30% after the PCC synthesis is finished.

The brewing process of the papermaking filler mainly comprises the following steps: brewing process of talcum powder, brewing process of titanium dioxide, brewing process of bentonite and brewing process of partial dry powder GCC and dry powder PCC. Further elaboration is as follows: the solid content of the talcum powder after brewing is controlled to be 5-50%, preferably 10-30%, and the solid content of the titanium dioxide after brewing is controlled to be 1-50%, preferably: 10-30 percent, and the solid content of the brewed bentonite is controlled to be 1-30 percent, preferably 5-15 percent.

The conventional reinforcing agent for papermaking comprises: cationic enhancers, anionic enhancers, amphoteric enhancers, and nonionic enhancers. Further, the reinforcing agent comprises a polyacrylamide reinforcing agent, a methylcellulose reinforcing agent, guar gum, chitosan, starch and other reinforcing agents with a paper reinforcing effect.

The first embodiment is as follows:

filling: heavy calcium carbonate (GCC) with a particle size of C60 and a solid content of 40 percent is adopted.

The synthetic process of the paper making filler with the reinforcing effect comprises the following steps: synthesis procedure Using a Diality enhancer

1. 35 parts of a 40% solids C60 grade calcium carbonate suspension, acrylamide: 24 parts, acrylic acid: 2 parts of acryloyloxyethyl ammonium chloride: 2 parts of acrylic acid diethylaminoethyl ester and 4 parts of acrylic acid diethylaminoethyl ester, wherein after the mixture is sufficiently and uniformly stirred, nitrogen is introduced, after oxygen is removed, the temperature is raised to 70 ℃, and an initiator potassium persulfate is added: 0.5 part, continuously heating to 95 ℃, and slowly adding a C60 grade calcium carbonate suspension with 40% solid content after keeping the temperature for 4 hours: 32 parts of the reaction solution is cooled to 40 ℃, and the reaction is finished after the pH value is adjusted to 3.5.

2. The obtained paper-making filler with reinforcing effect has solid content of more than 50% and viscosity of more than 2000cps

3. The performance test results of the prepared filler with the reinforcing effect for papermaking are as follows:

through comparison, the new filler with the reinforcing effect is used to replace the traditional papermaking filler GCC, the strength of the paper is greatly increased under the condition of the same using amount, the loss of the strength is far less than that of the traditional papermaking filler under the condition of increasing the using amount of the filler, and the retention rate of ash is also obvious.

Example two:

filling: light calcium carbonate (PCC) with a solid content of 20 percent is adopted.

The synthetic process of the paper making filler with the reinforcing effect comprises the following steps: adopting an anionic reinforcing agent to synthesize the following steps:

1. 70 parts of light calcium carbonate suspension with 20% solid content, acrylamide: 20 parts of itaconic acid: 6 parts of acryloyloxyethyl ammonium chloride: 4, fully and uniformly stirring, introducing nitrogen, removing oxygen, adding a small amount of copper sulfate and sodium persulfate, heating to 70 ℃, keeping the temperature for 4 hours, adjusting the pH value to 4-6, and finishing the reaction.

2. The obtained paper-making filler with reinforcing effect has solid content of more than 30% and viscosity of more than 2000cps

3. The performance test results of the prepared filler with the reinforcing effect for papermaking are as follows:

by contrast, it can be found that, after the new filler with the reinforcing effect is used to replace the traditional papermaking filler PCC, the paper strength is greatly increased under the condition of the same amount of the filler, and the loss of the strength is far less than that of the traditional papermaking filler under the condition of increasing the amount of the filler, and the retention rate of ash is also obvious.

Example three:

filling: talcum powder, D50 particle size of 6.5um

Process for manufacturing paper-making filler with reinforcing effect by adopting cationic guar gum process

1. 50 parts of talcum powder dry powder and 50 parts of guar gum dry powder, adding an ethanol solution to prepare a 40% suspension, slowly dropwise adding 9 parts of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride and 3 parts of NaOH solution (with the concentration of 10%) under the condition of fully stirring, heating to 85 ℃, reacting for 4 hours, and adjusting the pH value to be: and after 5.5-7.0, finishing the reaction, and dehydrating, washing with alcohol, drying, crushing and screening the product after the reaction to obtain the novel papermaking filler with the reinforcing effect.

2. The ash content of the obtained papermaking filler with the reinforcing effect is more than 50 percent.

3. The performance test results of the prepared filler with the reinforcing effect for papermaking are as follows:

through comparison, the new filler with the reinforcing effect is used to replace the traditional papermaking filler talcum powder, the strength of paper is greatly increased under the condition of the same using amount, the strength loss is far smaller than that of the traditional papermaking filler under the condition of improving the using amount of the filler, and the retention rate of ash is also obvious.