阅读说明：本技术 一种耐低温耐磨瓦楞纸板的制备方法 (Preparation method of low-temperature-resistant and wear-resistant corrugated board ) 是由 林悦敏 于 2019-10-15 设计创作，主要内容包括：本发明属于瓦楞纸板的加工技术领域,具体涉及一种耐低温耐磨瓦楞纸板的制备方法,包括对瓦楞纸板面纸和内纸的疏水处理,其中瓦楞面纸和内纸均为由化纤浆制成的玻璃纸,处理时在玻璃纸设于疏水处理泥浆中进行处理,自然晾置后烘干即得。本发明相比现有技术具有以下优点：通过对高岭土改性,改善其综合性能,然后与水性环氧树脂乳液K-051、甲基苯基硅树脂复合,作用于玻璃纸表面,能够与玻璃纸有效结合,在一定的温湿度条件下处理,能够在玻璃纸表面形成性能稳定的保护膜层,提高玻璃纸的疏水性能的同时,使其表面具有一定的耐磨性,保证在低温条件下对瓦楞纸箱拖拽仍能保持完整性,进而延长瓦楞纸箱在冷库中的使用寿命。(The invention belongs to the technical field of corrugated board processing, and particularly relates to a preparation method of a low-temperature-resistant and wear-resistant corrugated board. Compared with the prior art, the invention has the following advantages: through modifying kaolin, the comprehensive performance of the modified kaolin is improved, and then the modified kaolin is compounded with waterborne epoxy resin emulsion K-051 and methyl phenyl silicone resin to act on the surface of the glass paper, can be effectively combined with the glass paper and treated under certain temperature and humidity conditions, a protective film layer with stable performance can be formed on the surface of the glass paper, the hydrophobic property of the glass paper is improved, meanwhile, the surface of the glass paper has certain wear resistance, the corrugated case can be guaranteed to be dragged under low temperature conditions and still can keep integrity, and the service life of the corrugated case in a refrigeration house is further prolonged.)

1. A preparation method of a low-temperature-resistant and wear-resistant corrugated board is characterized by comprising the steps of carrying out hydrophobic treatment on surface paper and inner paper of the corrugated board, wherein the surface paper and the inner paper of the corrugated board are both glass paper made of chemical fiber pulp, treating the glass paper in hydrophobic treatment slurry for 10-20 seconds under the condition of keeping the temperature at 65-70 ℃, taking out the glass paper after the treatment, airing the glass paper for 30-40 minutes under natural conditions, and then drying the glass paper in a microwave hot air drying device;

the preparation method of the hydrophobic treatment mud comprises the following steps: fully mixing modified kaolin and deionized water in a weight ratio of 1:2.5-3.5 to obtain mixed slurry, adding 32-38% of aqueous epoxy resin emulsion K-051 and 6-10% of methyl phenyl silicone resin toluene solution into the mixed slurry, and uniformly stirring in a stirrer at the temperature of 60-80 ℃;

the preparation method of the modified kaolin comprises the steps of calcining the kaolin for 2 hours at the temperature of 700-800 ℃, then stirring and mixing the kaolin with 14-18% of rosin, 4-6% of graphite powder, 4-6% of ethylene-vinyl acetate copolymer, 1-2% of nano alumina and 6-10% of water which are equivalent to the weight of the kaolin in a stirrer at the temperature of 220-240 ℃, and then drying the mixture at the temperature of 80-100 ℃.

2. A method of manufacturing low temperature and wear resistant corrugated cardboard according to claim 1, wherein the cellophane basis weight is 29.0g/m, the longitudinal tear is 1.88 mN-m/g, the longitudinal elongation is 30.5%, the pH value is 7.4, and the water content is 8.6%.

3. The method for preparing a corrugated cardboard having low temperature and wear resistance according to claim 1, wherein the kaolin clay has a density of 2.54-2.60g/cm under high pressure and a wear value of 3.6mg/2000 under high pressure.

4. A method for preparing a low temperature and abrasion resistant corrugated cardboard as claimed in claim 1 wherein said graphite powder has a particle size of 5000 mesh and a mohs hardness of 3; the average particle size of the nano alumina is 30-60 nm.

5. A method for preparing a low temperature and abrasion resistant corrugated cardboard as claimed in claim 1 wherein said ethylene-vinyl acetate copolymer has a ethyl acetate content of 22-26%.

6. The method for preparing a low temperature resistant and wear resistant corrugated cardboard as claimed in claim 1, wherein the temperature of the microwave hot air drying device is 120-140 ℃.

7. The method for preparing a low temperature and abrasion resistant corrugated cardboard as claimed in claim 1, wherein the slurry treated glass paper is treated at a temperature of 70 to 80 ℃ and a humidity of 65 to 75% for 2 to 4 hours after the completion of the air-drying.

Technical Field

The invention belongs to the technical field of processing of corrugated boards, and particularly relates to a preparation method of a low-temperature-resistant and wear-resistant corrugated board.

Background

The corrugated case becomes the current main paper product packaging container with excellent buffer performance, good printing exhibition performance and environmental protection advantages, and is widely applied to the transportation of various commodities, the current general corrugated case in the market is sequentially provided with surface paper, corrugated paper and inner paper from outside to inside, wherein the corrugated paper is in a V-shaped wave structure, the corrugated case is easy to damp due to the fact that the main component of the corrugated case is paper fiber with strong water absorption, the corrugated case can be dragged in the loading, unloading or using process and the surface of the corrugated case can be torn or abraded, the surface paper and the inner paper are arranged on the surface of the corrugated paper and have higher water resistance requirement, in the prior art, a waterproof film is usually coated on the surface of the corrugated paper, the water resistance of the corrugated case can be improved to a certain extent, but in the freezing transportation industry, the transportation process needs to be kept in a low temperature state, if the water resistance of the surface paper and the inner paper is poor, the normal use of carton then can be influenced, normally handle the cardboard with the steeping liquor that uses paraffin oil as the main raw materials among the prior art, can improve water-fast low temperature resistance to a certain extent with the cardboard, nevertheless paraffin oil condenses into the material of similar paraffin back under the low temperature condition, can pull the carton in actual handling, produces destruction to the protective layer on carton surface easily, consequently, needs further processing to the top layer of corrugated box.

Disclosure of Invention

The invention aims to provide a preparation method of a low-temperature-resistant and wear-resistant corrugated board, aiming at the problem that the existing hydrophobic corrugated board is poor in wear resistance.

The invention is realized by the following technical scheme: a preparation method of a low-temperature-resistant and wear-resistant corrugated board comprises the steps of carrying out hydrophobic treatment on surface paper and inner paper of the corrugated board, wherein the surface paper and the inner paper are both glass paper made of chemical fiber pulp, treating the glass paper in hydrophobic treatment slurry for 10-20 seconds under the condition of keeping the temperature at 65-70 ℃, taking out the glass paper after the treatment, airing the glass paper for 30-40 minutes under natural conditions, and then transferring the glass paper into a microwave hot air drying device for drying;

the preparation method of the hydrophobic treatment mud comprises the following steps: fully mixing modified kaolin and deionized water in a weight ratio of 1:2.5-3.5 to obtain mixed slurry, adding 32-38% of aqueous epoxy resin emulsion K-051 and 6-10% of methyl phenyl silicone resin toluene solution into the mixed slurry, and uniformly stirring in a stirrer at the temperature of 60-80 ℃;

the preparation method of the modified kaolin comprises the steps of calcining the kaolin for 2 hours at the temperature of 700-800 ℃, then stirring and mixing the kaolin with 14-18% of rosin, 4-6% of graphite powder, 4-6% of ethylene-vinyl acetate copolymer, 1-2% of nano alumina and 6-10% of water which are equivalent to the weight of the kaolin in a stirrer at the temperature of 220-240 ℃, and then drying the mixture at the temperature of 80-100 ℃.

Specifically, the cellophane basis weight is 29.0g/m, the longitudinal tear rate is 1.88mN · m/g, the longitudinal elongation is 30.5%, the pH value is 7.4, and the water content is 8.6%; the glass paper with a certain performance is reasonably selected, so that the glass paper can be effectively combined with the hydrophobic treatment slurry, and certain mechanical strength can be ensured.

Specifically, the density of the kaolin is 2.54-2.60g/cm, and the detected abrasion value is 3.6mg/2000 times; the kaolin generally has better plasticity and fire resistance, has stronger binding capacity with other materials, and can also improve the stability of the composite material.

Specifically, the particle size of the graphite powder is 5000 meshes, and the Mohs hardness is 3; the average particle size of the nano alumina is 30-60 nm.

Specifically, the content of ethyl acetate in the ethylene-vinyl acetate copolymer is 22-26%, and the content of ethyl acetate in the range can ensure that the ethylene-vinyl acetate copolymer has certain resilience and good rigidity and wear resistance, and is beneficial to improving the comprehensive performance of the composite material.

Specifically, the temperature of the microwave hot air drying device during drying is 120-140 ℃, and the drying is carried out until the water content of the glass paper is reached.

Specifically, after the glass paper treated by the hydrophobic treatment slurry is aired, the glass paper is treated for 2 to 4 hours under the conditions that the temperature is 70 to 80 ℃ and the humidity is 65 to 75 percent, so that a protective film with stable property can be formed on the surface of the glass paper.

In the process of modifying kaolin, the structural water and the crystal water in the kaolin are removed by calcination, so that the specific surface area and the pore volume of the kaolin are increased, the wear resistance and the structural stability of the kaolin are further improved, and the kaolin is modified by using modifiers such as rosin and the like, so that the structural stability of the material is enhanced, and the compatibility of the kaolin with the waterborne epoxy resin emulsion K-051 can be enhanced.

The nano alumina can enhance the dispersion performance of the modified kaolin, so that the modified kaolin is uniformly combined with the waterborne epoxy resin emulsion K-051, and the hydrophobic treatment of the slurry is facilitated to form a uniform film layer on the surface of the glass paper; the graphite powder has good chemical stability, corrosion resistance and low permeability, and can modify kaolin under the composite action of the graphite powder, rosin and ethylene-vinyl acetate copolymer, and the unique lattice structure of the graphite powder can improve the structure of the kaolin and enhance the wear resistance of the kaolin.

The water-based epoxy resin emulsion K-051 is a non-ionic self-emulsifying water-based epoxy resin emulsion, can be used as a coating and an adhesive, has high strength and waterproof effect when being used with cement, sand and other prepared concrete, and has waterproof effect and low temperature resistance when being used together with mixed slurry. The methyl phenyl silicone resin is liquid silicone resin, can improve the flow property of the aqueous epoxy resin emulsion K-051, and can enhance the weather resistance and low temperature resistance of the protective film layer.

Compared with the prior art, the invention has the following advantages: through modifying kaolin, the comprehensive performance is improved, and then the kaolin is compounded with aqueous epoxy resin emulsion K-051 and methyl phenyl silicone resin to act on the surface of the cellophane, can be effectively combined with the cellophane, the protective film layer with stable performance can be formed on the surface of the cellophane by processing under certain temperature and humidity conditions, the hydrophobic property of the cellophane is improved, the surface of the corrugated paper has certain wear resistance, and the corrugated paper board is made of the corrugated paper and the corrugated medium paper according to the conventional technology, because the water-based epoxy resin emulsion K-051 has stronger low temperature resistance under the synergistic action with the methyl phenyl silicone resin, the wear resistance of the protective film layer can be enhanced by the synergistic action of the modified kaolin and the water-based epoxy resin emulsion K-051, and then guarantee to pull under the low temperature condition corrugated box and still can keep the integrality, and then prolong corrugated box's life in the freezer.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following detailed description, and it should be understood that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The water-based epoxy resin emulsion K-051 is provided by Shenyang Baichen chemical technology Co., Ltd; kaolin was purchased from Guangdong source Lei powder Ltd; the graphite powder is purchased from Henan six-industry import and export trade company Limited; the methylphenyl silicone is commercially available to Anhui Jinnot Silicone Ltd. The cellophane basis weight is 29.0g/m, the longitudinal tear strength is 1.88mN m/g, the longitudinal elongation is 30.5%, the pH value is 7.4, and the water content is 8.6%; the density of the kaolin is 2.54-2.60g/cm, and the detected abrasion value is 3.6mg/2000 times; the particle size of the graphite powder is 5000 meshes, and the Mohs hardness is 3; the average particle size of the nano alumina is 30-60 nm; the ethyl acetate content of the ethylene-vinyl acetate copolymer is 22-26%; wherein the mass concentration of the toluene solution of the methyl phenyl silicone resin is 20 percent.