阅读说明：本技术 一种具有可冲散性白卡纸的制作工艺及其配方 (Preparation process and formula of washable white cardboard ) 是由 陈俊 于 2021-05-17 设计创作，主要内容包括：本发明公开了一种具有可冲散性白卡纸的制作工艺及其配方,涉及造纸技术技术领域,所述操作步骤如下：步骤一、对纸浆进行初步研磨：将面浆底浆经过螺旋出料后用于磨浆机打磨,芯浆通过磨浆机进行打磨；步骤二、混料：分别对面浆底浆和芯浆的内部混入淀粉和纤维改性剂；本发明通过改变纸张内配方比例使得该白卡纸在达到一定的物理指标的基础上拥有了可冲散性,可还原浆性以及可水解性,该白卡纸生产出来的卫生纸管芯使用后可以直接丢弃在马桶中,不会造成马桶,下水道堵塞,此外,在卫生纸制作流程中带有该纸管芯的残次品可以直接随卫生纸一起重新制浆,极大程度上减少了卫生纸制作的成本,增加制造效率。(The invention discloses a manufacturing process and a formula of a washable and dispersible ivory board, which relate to the technical field of papermaking and comprise the following operation steps: step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine; step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp; the invention makes the white cardboard have flushability, reducible pulp property and hydrolyzability on the basis of reaching certain physical indexes by changing the proportion of the formula in the paper, the toilet paper tube core produced by the white cardboard can be directly discarded in a toilet bowl after use, the toilet bowl and a sewer can not be blocked, in addition, defective goods with the paper tube core in the toilet paper manufacturing process can be directly repulped together with the toilet paper, the cost of toilet paper manufacturing is greatly reduced, and the manufacturing efficiency is increased.)

1. A preparation process and a formula of a white cardboard with flushability are characterized in that the preparation process comprises the following operation steps:

step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;

step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;

step three, layering and stacking the flour paste: preparing surface pulp, bottom pulp and core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to obtain semi-finished paper;

step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.

The components of the surface pulp and the bottom pulp comprise (40% -55%) long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + (60% -45%) short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises (30% -40%) long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + (70% -60%) short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 20-30 kg/ton finished white cardboard, fiber modifier: 5-10 kg/ton finished white cardboard.

2. The process according to claim 1, wherein the first step comprises: and (3) carrying out high-concentration grinding on the pulp for 30-40 ℃, and adding a fiber modifier in the second step.

3. The process for making a dispersible ivory board according to claim 1, wherein the temperature for high grinding of the core pulp in the first step is controlled to be 30-40 ℃.

4. The process for preparing a white cardboard with flushability according to claim 1, wherein the ratio of the components of the white cardboard is surface pulp layer and bottom pulp layer (25% -40%) + core pulp layer (75% -60%).

Technical Field

The invention relates to a papermaking technology, in particular to a manufacturing process and a formula of a white cardboard with flushability.

Background

Most toilet paper manufacturers in the market currently use white cardboard as the raw material of the toilet paper tube core, the original physical indexes of the white cardboard are mainly required to meet the basic requirements of the toilet paper tube core, including whiteness, hardness, stiffness and environmental protection and safety of the original material, and some manufacturers use food-grade white cardboard as the raw material of the toilet paper tube core, because the production process of the toilet paper has no inevitable defective products, which are recovered from the production line and re-made into pulp to produce the toilet paper, while the paper core of the non-flushable white cardboard can not meet the production process requirements, and the paper core and the toilet paper can only be peeled manually at present.

The product with flushability is directly thrown into water, can keep the smoothness of a toilet bowl and a sewer system, is compatible with the existing sewage conveying system and treatment system, does not need to treat the wastes in an additional way, is environment-friendly and has good biodegradability, the product with reducible pulp property is directly put into a papermaking production line together with primary pulp, does not need additional treatment, has similar water solubility and solubility with the primary pulp, and the product with hydrolysable property is that the product can be decomposed after being soaked in the water for a certain time, and the decomposed substances have no pollution,

disclosure of Invention

The invention aims to provide a manufacturing process and a formula of a washable white cardboard, so as to solve the problems in the background technology.

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

a preparation process and a formula of a white cardboard with flushability are disclosed, wherein the preparation process comprises the following operation steps:

step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;

step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;

step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;

step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.

The components of the surface pulp and the bottom pulp comprise (40% -55%) long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + (60% -45%) short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises (30% -40%) long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + (70% -60%) short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 20-30 kg/ton finished white cardboard, fiber modifier: 5-10 kg/ton finished white cardboard.

As a further scheme of the invention: the surface sizing layer and the bottom sizing layer in the step I: and (3) carrying out high-concentration grinding on the pulp for 30-40 ℃, and adding a fiber modifier in the second step.

As a further scheme of the invention: the temperature of the core slurry subjected to high grinding in the first step is controlled to be 30-40 ℃.

As a still further scheme of the invention: the proportion of the components of the white cardboard is a surface pulp layer and a bottom pulp layer (25-40%) + a core pulp layer (75-60%).

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

the invention makes the white cardboard have flushability, reducible pulp property and hydrolyzability on the basis of reaching certain physical indexes by changing the proportion of the formula in the paper, the toilet paper tube core produced by the white cardboard can be directly discarded in a toilet bowl after use, the toilet bowl and a sewer can not be blocked, in addition, defective goods with the paper tube core in the toilet paper manufacturing process can be directly repulped together with the toilet paper, the cost of toilet paper manufacturing is greatly reduced, and the manufacturing efficiency is increased.

Detailed Description

In the embodiment of the invention, a manufacturing process and a formula of a white cardboard with flushability comprise the following embodiments:

example 1

The operation steps are as follows:

step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;

step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;

step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;

step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.

The components of the surface pulp and the bottom pulp comprise 40% long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + 60% short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises 30% long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + 70% short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 20 kg/ton finished white cardboard, fiber modifier: 5 kg/ton finished white cardboard.

The surface sizing layer and the bottom sizing layer in the step I: and (3) carrying out high-concentration grinding on the pulp for 30 degrees, and adding a fiber modifier in the second step.

The temperature of the core slurry for high grinding in the first step is controlled at 30 ℃.

The ratio of the components of the white cardboard is 25% of surface pulp layer and bottom pulp layer + 75% of core pulp layer.

Example 2

The operation steps are as follows:

step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;

step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;

step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;

step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.

The components of the surface pulp and the bottom pulp comprise 55% long fiber pulp (such as softwood pulp, softwood pulp waste pulp) + 45% short fiber pulp (such as hardwood pulp, hardwood pulp waste pulp), and the core pulp comprises 40% long fiber chemi-mechanical pulp (such as softwood chemi-mechanical pulp) + 60% short fiber chemi-mechanical pulp (such as poplar chemi-mechanical pulp), surface starch glue: 30 kg/ton finished white cardboard, fiber modifier: 10 kg/ton finished white cardboard.

The surface sizing layer and the bottom sizing layer in the step I: and grinding the pulp at a high concentration of 40 degrees, and adding a fiber modifier in the step two.

The temperature of the core slurry subjected to high grinding in the first step is controlled at 40 ℃.

The ratio of the components of the white cardboard is 40% of surface pulp layer and bottom pulp layer and 60% of core pulp layer.

Example 3

The operation steps are as follows:

step one, carrying out primary grinding on paper pulp: the surface pulp bottom pulp is spirally discharged and then is used for polishing by a pulping machine, and the core pulp is polished by the pulping machine;

step two, mixing materials: respectively mixing starch and a fiber modifier into the surface pulp bottom pulp and the core pulp;

step three, layering and stacking the flour paste: preparing the surface pulp, the bottom pulp and the core pulp into thin layers, placing the core layer between the surface layer and the bottom layer, and extruding and combining the layers by an extruding device to form semi-finished paper;

step four, applying surface starch glue: and uniformly brushing the surface starch glue on the surface of the semi-finished paper, and cooling to obtain the white cardboard.

The composition of the face stock and the bottom stock included 47.5%) long fiber pulp (e.g.; softwood pulp, softwood pulp-based waste pulp) + 52.5% short fiber pulp (e.g., hardwood pulp-based waste pulp), core pulp comprising 35% long fiber chemi-mechanical pulp (e.g.; needle chemi-mechanical pulp) + 65% short fiber chemi-mechanical pulp (e.g; poplar chemi-mechanical pulp), surface starch glue: 25 kg/ton finished white cardboard, fiber modifier: 7.5 kg/ton finished white cardboard.

The surface sizing layer and the bottom sizing layer in the step I: and grinding the pulp at a high concentration of 35 degrees, and adding a fiber modifier in the step two.

The temperature of the core slurry subjected to high grinding in the first step is controlled to be 35 ℃.

The ratio of the components of the white cardboard is 32.5% of surface pulp layer and bottom pulp layer + 67.5% of core pulp layer.

By combining the above embodiments and performing a detection test on the cardboard paper in the production place, firstly according to the principle: soaking the sample in distilled water at normal temperature for 3-5 min, stirring with a stirrer at constant speed for 10-15 min (rotation speed of 1500 rpm), and observing and inspecting the scattering condition of the sample.

The instrument comprises the following steps:

500ml of triangular flask, a flask fixing support, a constant-speed stirrer (with two smooth fan blades), a self-made screen, a thermometer, a timer or a stopwatch,

preparing a sample, namely taking the washable core paper with the length of 4cm and the width of 4cm, wherein the gram weight of 0.304g +/-0.008 g;

preparing before detection, adding 500ml of distilled water into the Erlenmeyer flask, placing the Erlenmeyer flask on a flask fixing support, and placing a stirrer in the center of the Erlenmeyer flask in a hanging manner.

Sample detection:

measuring and recording the temperature of 500ml of distilled water in a flask, soaking a sample in a triangular flask filled with 500ml of distilled water, standing for 3-5 minutes, stirring the soaked sample in the flask at a constant speed of 1500 rpm for 10-15 minutes, wherein a large amount of filamentous fibers and a small amount of flaky floc of about 0.3cm x 0.3cm are observed in the flask, filtering the distilled water and the dispersed fibers by using a self-made screen and taking out the flaky floc, slightly kneading the flaky floc by hand, and immediately dispersing the flaky floc.

And (4) judging a result:

the sample can be judged to return to the production line together with the primary pulp and defective toilet paper products of the production line for repulping through the detection of the dispersible paper core paper, and the possibility of secondary recovery and pulping of defective toilet paper products is fundamentally solved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and modifications of the invention can be made, and equivalents of some features of the invention may be substituted, and any changes, equivalents, improvements and the like, which are within the spirit and principle of the invention, and which are not described in detail in the specification are within the scope of the invention and are known to those skilled in the art.