Cattle base solution paper-wrapping coating

Abstract

The invention relates to the technical field of paper pulp coatings, in particular to a cow base solution wrapping paper coating, which comprises the following components in parts by weight: 94 parts of 60-grade calcium carbonate, 6 parts of calcined soil, 14 to 16 parts of SA latex, 0.12 to 0.15 part of dispersant, 0.5 to 0.7 part of CMC, 0.20 to 0.25 part of lubricant, 0.3 to 0.4 part of water repellent agent, 0.01 to 0.015 part of bactericide, 0.1 to 0.12 part of alkali and 0.07 to 0.09 part of defoaming agent. Calcined soil is added in the pre-coating section, so that the covering property of the coating is improved; food-grade SA latex with low odor is selected, and the dosage is increased, so that the odor is reduced, the strength and the sealing property of the coating are improved, the permeation of ink into fibers is reduced, the gloss after printing is improved, and good printing effect and printability are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of pulp coatings, in particular to a cattle-bottom liquid paper coating. Background Art

[0002] In recent years, with the continuous development of society and the pursuit of healthy life by human beings, beautiful, economical, environmentally friendly and healthy liquid packaging products are becoming more and more popular. The known white-bottom liquid packaging base paper is produced with chemical wood pulp and bleached chemical wood pulp, with a large amount of chemicals, large base paper quantity, high cost and great environmental pressure. The cow-bottom liquid packaging paper adopts a three-layer structure of surface, core and bottom. On the printing surface, three coatings are used. No fluorescent brightener is added to the product. The base pulp is unbleached natural pulp, which reduces the amount of pulping chemicals, is more environmentally friendly and meets food safety and hygiene requirements. In addition, the cow-bottom liquid packaging paper has a low quantity and high economic benefits, so the cow-bottom liquid package is becoming more and more popular.

[0003] However, liquid packaging box manufacturers and consumers are paying more and more attention to the printing exquisiteness and odor of cow-bottom liquid packaging. The original coating production process has poor coating hiding power, which makes the original color of the cow-bottom liquid packaging paper easy to show, and the printing is not exquisite enough; the problem of strong odor when using styrene-butadiene latex is also gradually emerging. Summary of the invention

[0004] The purpose of the present invention is to provide a cattle-based liquid paper coating in view of the defects and shortcomings of the prior art, add calcined clay in the pre-coating stage to improve the hiding power of the coating; select food-grade SA latex with low odor and increase the dosage to improve the strength and sealing of the coating while ensuring the reduction of odor, reduce the penetration of ink into the fiber, improve the gloss after printing, and ensure good printing effect and printability.

[0005] To achieve the above object, the present invention adopts the following technical scheme: it is divided into a pre-coating coating, a mid-coating coating and a top-coating coating; wherein the pre-coating coating comprises the following weight groups: 94 parts of calcium carbonate 60 grade, 6 parts of calcined clay, 14-16 parts of SA latex, 0.12-0.15 parts of dispersant, 0.5-0.7 parts of CMC, 0.20-0.25 parts of lubricant, 0.3-0.4 parts of water repellent, 0.01-0.015 parts of bactericide, 0.1-0.12 parts of alkali, and 0.07-0.09 parts of defoamer; the mid-coating coating comprises the following weight groups: 100 parts of calcium carbonate 60 grade, 14-16 parts of SA latex, 0.12 -0.15 parts, CMC0.5-0.7 parts, lubricant 0.20-0.25 parts, water repellent 0.3-0.4 parts, bactericide 0.01-0.015 parts, alkali 0.1-0.12 parts, defoamer 0.07-0.09 parts; the top coating contains the following weight components: 94 parts of calcium carbonate 95 grade, 30 parts of porcelain clay, 16-17 parts of SA latex, 0.12-0.15 parts of dispersant, CMC0.4-0.7 parts, lubricant 0.20-0.25 parts, water repellent 0.3-0.4 parts, bactericide 0.01-0.015 parts, alkali 0.1-0.12 parts, defoamer 0.07-0.09 parts.

[0006] Furthermore, the pre-coating coating comprises the following components by weight: 94 parts of calcium carbonate grade 60, 6 parts of calcined clay, 16 parts of SA latex, 0.15 parts of dispersant, 0.7 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoaming agent.

[0007] Furthermore, the mid-coat coating comprises the following components by weight: 100 parts of grade 60 calcium carbonate, 16 parts of SA latex, 0.15 parts of dispersant, 0.6 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoaming agent.

[0008] Furthermore, the topcoat comprises the following components by weight: 94 parts of calcium carbonate grade 95, 30 parts of china clay, 17 parts of SA latex, 0.15 parts of dispersant, 0.4 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoaming agent.

[0009] Furthermore, the solid content of the calcium carbonate grade 60 is 74.5±1.

[0010] Furthermore, the solid content of the calcium carbonate grade 95 is 74.5±1.

[0011] Furthermore, the solid content of the porcelain clay is 70±1.

[0012] Furthermore, the solid content of the calcined soil is 50±1.

[0013] Furthermore, the solid content of the SA latex is 50±1.

[0014] Furthermore, the solid content of the dispersant is 50±1.

[0015] Furthermore, the solid content of the CMC is 10±1.

[0016] Furthermore, the solid content of the lubricant is 25±1.

[0017] Furthermore, the solid content of the water repellent is 50±1.

[0018] Furthermore, the solid content of the bactericide is 100±1.

[0019] Furthermore, the solid content of the alkali is 28±1.

[0020] Furthermore, the solid content of the defoaming agent is 100±1.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a cattle base liquid paper coating, which improves the covering power of the coating on the cattle base liquid paper; reduces the odor of the base paper, while improving the strength and sealing of the coating, reducing the penetration of ink into the fiber, improving the gloss after printing, ensuring good printing effect and printability, and enhancing the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a flow chart of the preparation of the pre-coating coating in the present invention.

[0023] Figure 2 It is a flow chart of the preparation of the midcoat coating in the present invention.

[0024] Figure 3 It is a flow chart of the preparation of topcoat coating in the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples, and all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] like Figure 1-Figure 3As shown, this embodiment is divided into a pre-coating coating, a mid-coating coating and a top-coating coating; wherein the pre-coating coating comprises the following weight groups: 94 parts of calcium carbonate 60 grade, 6 parts of calcined clay, 16 parts of SA latex, 0.15 parts of dispersant, 0.7 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer; the mid-coating coating comprises the following weight groups: 100 parts of calcium carbonate 60 grade, 16 parts of SA latex, 0.15 parts of dispersant, 0.6 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer; the top-coating coating comprises the following weight groups: Components: 94 parts of grade 95 calcium carbonate, 30 parts of china clay, 17 parts of SA latex, 0.15 parts of dispersant, 0.4 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer; the solid content of grade 60 calcium carbonate is 75, the solid content of grade 95 calcium carbonate is 75, the solid content of china clay is 70, the solid content of calcined clay is 50, the solid content of SA latex is 50, the solid content of dispersant is 50, the solid content of CMC is 10, the solid content of lubricant is 25, the solid content of water repellent is 50, the solid content of bactericide is 100, the solid content of alkali is 28, and the solid content of defoamer is 100.

[0028] The pre-coating coating components are pumped into coating preparation tanks to prepare pre-coating coatings with different viscosities and solid contents, and then pumped into coating feed tanks for standby use, and then pumped into coating heads of paper machines for pre-coating of paper;

[0029] The above-mentioned mid-coat coating components are respectively pumped into the coating preparation tank to prepare pre-coating coatings of different viscosities and solid contents, and then pumped into the coating feed tank for standby use, and then pumped into the coating head of the paper machine for pre-coating of paper;

[0030] The above-mentioned topcoat coating components are respectively pumped into the coating preparation tank to prepare pre-coating coatings with different viscosities and solid contents, and then pumped into the coating feed tank for standby use, and then pumped into the paper machine coating head for pre-coating of paper.

[0031] Embodiment 2:

[0032] This embodiment is divided into pre-coating, mid-coating and top-coating; wherein the pre-coating comprises the following weight groups: 94 parts of calcium carbonate grade 60, 6 parts of calcined clay, 16 parts of SA latex, 0.15 parts of dispersant, 0.7 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer; the mid-coating comprises the following weight groups: 100 parts of calcium carbonate grade 60, 16 parts of SA latex, 0.12 parts of dispersant, 0.7 parts of CMC, 0.2 parts of lubricant, 0.3 parts of water repellent, 0.015 parts of bactericide, 0.12 parts of alkali, and 0.09 parts of defoamer; the top-coating comprises the following weight groups The solid content of the calcium carbonate grade 60 is 75, the solid content of the calcium carbonate grade 95 is 75, the solid content of the china clay is 70, the solid content of the calcined clay is 50, the solid content of the SA latex is 50, the solid content of the dispersant is 50, the solid content of the CMC is 10, the solid content of the lubricant is 25, the solid content of the water repellent is 50, the solid content of the bactericide is 100, the solid content of the alkali is 28, and the solid content of the defoamer is 100.

[0033] The coating method of this embodiment is the same as that of the first embodiment.

[0034] Embodiment three:

[0035] This embodiment is divided into pre-coating, mid-coating and top-coating; wherein the pre-coating comprises the following weight groups: 94 parts of calcium carbonate grade 60, 6 parts of calcined clay, 16 parts of SA latex, 0.12 parts of dispersant, 0.5 parts of CMC, 0.25 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.09 parts of defoamer; the mid-coating comprises the following weight groups: 100 parts of calcium carbonate grade 60, 16 parts of SA latex, 0.12 parts of dispersant, 0.7 parts of CMC, 0.2 parts of lubricant, 0.3 parts of water repellent, 0.015 parts of bactericide, 0.12 parts of alkali, and 0.09 parts of defoamer; the top-coating comprises the following weight groups The solid content of the calcium carbonate grade 60 is 75, the solid content of the calcium carbonate grade 95 is 75, the solid content of the china clay is 70, the solid content of the calcined clay is 50, the solid content of the SA latex is 50, the solid content of the dispersant is 50, the solid content of the CMC is 10, the solid content of the lubricant is 25, the solid content of the water repellent is 50, the solid content of the bactericide is 100, the solid content of the alkali is 28, and the solid content of the defoamer is 100.

[0036] The coating method of this embodiment is the same as that of the first embodiment.

[0037] The invention mainly adjusts the pre-coated pigment, reduces the amount of calcium carbonate added, and increases calcined clay; replaces the styrene-butadiene latex with a strong odor with SA latex, and increases the amount used to ensure the strength and sealing of the coating; calcium carbonate, porcelain clay, and calcined clay are used as the pigment part in the coating to cover the base paper of the cow bottom liquid package; latex and CMC play the role of adhesive, CMC can be used to adjust the viscosity and water retention effect of the coating, and the type of latex can affect the absorption of the printed ink, etc.; the dispersant is mainly used to disperse the pigment particles of calcium carbonate, porcelain clay, calcined clay, etc. to prevent flocculation; the functional additives such as lubricants and water repellents only play the role of lubrication in the coating process and give the coating water resistance; the bactericide is mainly used to control the number of spores in the coating; the alkali is used to adjust the pH of the coating to ensure that the coating is alkaline and prevent bacteria from growing, etc.; the defoamer is used to eliminate bubbles in the coating to prevent the bubbles from affecting the coating effect.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a cattle-based liquid-wrapped paper coating, adds calcined clay in the pre-coating stage to improve the hiding power of the coating; selects food-grade SA latex with low odor and increases the dosage, thereby improving the strength and sealing of the coating while ensuring the reduction of odor, reducing the penetration of ink into the fiber, improving the gloss after printing, and ensuring good printing effect and printability.

[0039] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cow bottom liquid paper coating, characterized in that: It is divided into pre-coating, mid-coating and top-coating; the pre-coating comprises the following weight components: 94 parts of calcium carbonate grade 60, 6 parts of calcined clay, 14-16 parts of SA latex, 0.12-0.15 parts of dispersant, 0.5-0.7 parts of CMC, 0.20-0.25 parts of lubricant, 0.3-0.4 parts of water repellent, 0.01-0.015 parts of bactericide, 0.1-0.12 parts of alkali and 0.07-0.09 parts of defoamer; the mid-coating comprises the following weight components: 100 parts of calcium carbonate grade 60, 14-16 parts of SA latex, 0.12-0.15 parts of dispersant, CMC0 .5-0.7 parts, lubricant 0.20-0.25 parts, water repellent 0.3-0.4 parts, bactericide 0.01-0.015 parts, alkali 0.1-0.12 parts, defoamer 0.07-0.09 parts; the topcoat contains the following components by weight: 94 parts of calcium carbonate grade 95, 30 parts of porcelain clay, 16-17 parts of SA latex, 0.12-0.15 parts of dispersant, 0.4-0.7 parts of CMC, 0.20-0.25 parts of lubricant, 0.3-0.4 parts of water repellent, 0.01-0.015 parts of bactericide, 0.1-0.12 parts of alkali, defoamer 0.07-0.09 parts.

2. A cow bottom liquid paper coating according to claim 1, characterized in that: The pre-coating coating comprises the following components by weight: 94 parts of calcium carbonate grade 60, 6 parts of calcined clay, 16 parts of SA latex, 0.15 parts of dispersant, 0.7 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer.

3. A cow bottom liquid paper coating according to claim 2, characterized in that: The mid-coat comprises the following components by weight: 100 parts of grade 60 calcium carbonate, 16 parts of SA latex, 0.15 parts of dispersant, 0.6 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer.

4. The cow bottom liquid paper coating according to claim 3, characterized in that: The top coating comprises the following components by weight: 94 parts of calcium carbonate grade 95, 30 parts of china clay, 17 parts of SA latex, 0.15 parts of dispersant, 0.4 parts of CMC, 0.2 parts of lubricant, 0.4 parts of water repellent, 0.01 parts of bactericide, 0.12 parts of alkali, and 0.08 parts of defoamer.

5. A cow bottom liquid paper coating according to claim 4, characterized in that: The solid content of the calcined soil is 50±1.

6. A cow bottom liquid paper coating according to claim 5, characterized in that: The solid content of the SA latex is 50±1.

7. A cow bottom liquid paper coating according to claim 6, characterized in that: The solid content of the porcelain clay is 70±1.

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