CN111231425A - Waterproof corrugated paper and preparation method thereof - Google Patents
Waterproof corrugated paper and preparation method thereof Download PDFInfo
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- CN111231425A CN111231425A CN202010106838.4A CN202010106838A CN111231425A CN 111231425 A CN111231425 A CN 111231425A CN 202010106838 A CN202010106838 A CN 202010106838A CN 111231425 A CN111231425 A CN 111231425A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/20—Corrugating; Corrugating combined with laminating to other layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
- B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/64—Inorganic compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the field of corrugated paper preparation, in particular to a preparation method of waterproof corrugated paper, which comprises a corrugated paper core, and surface paper and lining paper which are adhered and fixed on the upper surface and the lower surface of the corrugated paper core, wherein the preparation method of the corrugated paper comprises the following steps: s1, preparing a corrugated paper core; s2, treating surface paper and lining paper; s3, gluing and compounding; s4, preparing a waterproof coating; s5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying at 55-58 ℃ for 3-6min to obtain a semi-finished waterproof corrugated paper; and S6, cutting the semi-finished waterproof corrugated paper. The corrugated paper prepared by the invention has good waterproof and moistureproof performances.
Description
Technical Field
The invention relates to the technical field of corrugated paper preparation, in particular to waterproof corrugated paper and a preparation method thereof.
Background
Corrugated cardboard is the most important packaging material, and has the advantages of light weight and low cost compared with other packaging materials (such as wood, paperboard and the like), and the weight of the corrugated cardboard with three layers is about 600g/m2And the weight of the same thickness of wood board is about 2000g/m2Which is more than 3 times of corrugated paper.
Corrugated paper is a composite material consisting of cellulose fibers and a high-molecular adhesive, and the raw material of the corrugated paper is raw paper, can be made of wood pulp (leftover materials of wood) and straw pulp, and can be conveniently recycled. Because of the smoothness of the paper board, the paper board can be conveniently printed and folded, and occupies a small space during storage and transportation.
However, the existing corrugated paper has poor moisture resistance, is very easy to cause the strength reduction and even collapse damage of the corrugated paper due to the infiltration of moisture, and is difficult to bear the weight of the product when the product is stacked heavily, and the corrugated paper is easy to deform or cause the collapse damage of the corrugated paper.
Disclosure of Invention
The invention aims to provide a preparation method of waterproof corrugated paper, and the prepared corrugated paper has good waterproof and moistureproof performances.
In order to realize the first purpose, the invention provides the following technical scheme:
a preparation method of waterproof corrugated paper comprises a corrugated paper core, and surface paper and lining paper which are adhered and fixed on the upper surface and the lower surface of the corrugated paper core, wherein the preparation method of the corrugated paper comprises the following steps:
s1, preparing a corrugated paper core: heating the base paper by a heater, wherein the preheating temperature is 102-104 ℃, the preheating time is 2.5-3h, and then embossing the heated base paper by a corrugating roller to form a UV type corrugated paper core;
s2, surface paper and lining paper treatment: respectively carrying out preheating treatment on the surface paper and the lining paper, wherein the preheating temperature is 102-104 ℃;
s3, gluing and compounding: coating an adhesive on the ridges of the corrugated paper core, respectively pressing the surface paper and the lining paper on the two sides of the corrugated paper core, wherein the pressure value range is between 2.3 and 2.5N, and drying for 2 to 3 hours at the temperature of 120-;
s4, preparing a waterproof coating;
s5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying at 55-58 ℃ for 3-6min to obtain a semi-finished waterproof corrugated paper;
s6, cutting the semi-finished waterproof corrugated paper: and cutting the dried semi-finished waterproof corrugated paper into finished waterproof corrugated paper by using a longitudinal and transverse cutting machine according to the required size.
By adopting the technical scheme, the preheating of the raw paper, the surface paper and the lining paper for preparing the corrugated paper core at the temperature of 102-104 ℃ is favorable for improving the forming of the corrugated paper core and the subsequent adhesion among the corrugated paper core, the surface paper and the lining paper, and the waterproof coating can be better attached to the surfaces of the surface paper and the lining paper after the preheating treatment of the surface paper and the lining paper; the surface paper and the lining paper are respectively pressed on two sides of the corrugated medium paper under the pressure of 2.3-2.5N, so that the lining paper and the surface paper can be tightly adhered on two sides of the corrugated medium paper, the phenomenon that water penetrates into the corrugated paper is reduced, the surface paper and the lining paper are coated with waterproof paint, and the surface paper and the lining paper are dried for 3-6min at 55-58 ℃, so that the waterproof layer can be favorably solidified, the situation that the waterproof layer is cracked due to overhigh temperature is favorably reduced, and the waterproof and damp-proof performance of the corrugated paper is favorably enhanced.
Further, in step S3, after the face paper and the liner paper are respectively laminated on both sides of the corrugated paper core, the corrugated paper core is preheated and then dried, wherein the preheating temperature is 110-.
By adopting the technical scheme, preheating is carried out in the step S4, and then drying is carried out, so that the adhesive is prevented from being dried and cracked due to sudden temperature increase.
Further, in step S4, the waterproof coating material includes the following components expressed in parts by mass:
10-15 parts of polyurethane emulsion
4-8 parts of talcum powder
2.5-3 parts of film-forming assistant
1-2 parts of defoaming agent
1-1.5 parts of paraffin emulsion
0.5-1 part of preservative.
By adopting the technical scheme, the polyurethane emulsion is used as the main component of the waterproof coating, and the talcum powder plays a filling role, so that the structural strength of a waterproof layer formed by the waterproof coating is favorably improved, and the waterproof layer is favorably smoother; the defoaming agent can eliminate micro bubbles in the waterproof coating, improve the smoothness degree of the waterproof layer and is beneficial to improving the structural strength of the waterproof layer; the addition of the paraffin emulsion is favorable for improving the fluidity of the waterproof coating, so that the waterproof coating can be more uniformly coated on surface paper and lining paper, and the abrasion resistance of a waterproof layer formed by the waterproof coating is also favorably improved.
Further, in step S4, the waterproof coating material includes the following components expressed in parts by mass:
11-14 parts of polyurethane emulsion
5-7 parts of talcum powder
2.5-2.8 parts of film-forming additive
1.2 to 1.9 portions of defoaming agent
1-1.5 parts of paraffin emulsion
0.5-1 part of preservative.
By adopting the technical scheme, the components are compounded according to the proportion, so that the waterproof performance of the waterproof coating is improved.
Further, in step S4, the waterproof coating material includes the following components expressed in parts by mass:
13 parts of polyurethane emulsion
6 portions of talcum powder
Film-forming assistant 2.7 parts
1.8 portions of defoaming agent
1.4 parts of paraffin emulsion
0.75 part of preservative.
By adopting the technical scheme, the components are compounded according to the specific proportion, so that the waterproof effect of the waterproof layer formed after the waterproof coating is coated on corrugated paper is better.
Further, the waterproof coating also comprises 1-1.5 parts by mass of glass beads.
Further, the diameter of the glass micro-beads ranges from 0.05 to 0.2 μm.
By adopting the technical scheme, the glass beads are matched with the talcum powder in the waterproof coating, so that the surface of the corrugated paper coated with the waterproof coating is smooth.
Furthermore, the mesh number of the talcum powder is 800-1250 mesh.
Further, the defoaming agent is polydimethylsiloxane and polyether modified siloxane in a mass ratio of (1.2-1.4): 1, in a mixture of the components.
By adopting the technical scheme, the dimethyl silicone polymer and the polyether modified siloxane are compounded according to the mass ratio in a specific range to obtain the defoaming agent, so that micro bubbles in the waterproof coating can be further eliminated, and the waterproof coating forms a compact waterproof layer on the corrugated paper, which is favorable for further improving the waterproof performance of the waterproof layer.
The second purpose of the invention is to provide waterproof corrugated paper, and the prepared corrugated paper has good waterproof and moistureproof performances.
In order to achieve the second purpose, the invention provides the following technical scheme:
the waterproof corrugated paper is prepared by the preparation method of the waterproof corrugated paper.
In conclusion, the invention has the following beneficial effects:
1. the surface paper and the lining paper are respectively pressed on two sides of the corrugated medium paper under the pressure of 2.3-2.5N, so that the lining paper and the surface paper can be tightly adhered on two sides of the corrugated medium paper, the phenomenon that water penetrates into the corrugated paper is reduced, the surface paper and the lining paper are coated with waterproof paint, and the surface paper and the lining paper are dried for 3-6min at 55-58 ℃, so that the waterproof layer can be favorably solidified, the situation that the waterproof layer is cracked due to overhigh temperature is favorably reduced, and the waterproof and damp-proof performance of the corrugated paper is favorably enhanced.
2. The polyurethane emulsion is used as the main component of the waterproof coating, and the talcum powder plays a role in filling, so that the structural strength of a waterproof layer formed by the waterproof coating is favorably improved, and the waterproof layer is favorably smoother; the defoaming agent can eliminate micro bubbles in the waterproof coating, improve the smoothness degree of the waterproof layer and is beneficial to improving the structural strength of the waterproof layer; the addition of the paraffin emulsion is favorable for improving the fluidity of the waterproof coating, so that the waterproof coating can be more uniformly coated on surface paper and lining paper, and the abrasion resistance of a waterproof layer formed by the waterproof coating is also favorably improved.
3. The waterproof coating prepared by the invention has better synergistic effect with the specific preparation method of the invention, and can improve the waterproof performance and structural strength of corrugated paper.
Drawings
Fig. 1 is a flow chart of a method for preparing waterproof corrugated paper of the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 and examples.
In the following examples, the adhesive used was an aqueous adhesive sold under the type G-305 by Dezhong chemical technology Co., Ltd, Fushan City.
In the following examples, cason sold by Shandong Yinji chemical science and technology Limited is used as the preservative.
In the following examples, the paraffin wax emulsion is a low-density polyethylene wax emulsion sold by Yiju chemical technology Co., Ltd, Longkou, with model number TL-204E.
In the following examples, the coalescent was ethylene glycol.
Table 1 components and parts by mass of the waterproof coating.
Example 1
A waterproof corrugated paper comprising a corrugated paper core and surface paper and liner paper adhesively fixed to the upper and lower surfaces of the corrugated paper core, as shown in fig. 1, the specific preparation method of the waterproof corrugated paper comprising the steps of:
s1, preparing a corrugated paper core: and heating the base paper by using a heater, wherein the preheating temperature is 102 ℃, the preheating time is 2.5 hours, and then embossing the heated base paper by using a corrugating roller to form the UV type corrugated paper core.
S2, surface paper and lining paper treatment: the surface paper and the lining paper are respectively preheated by a heating roller, the preheating temperature is 102 ℃, and the advancing speed of the surface paper and the lining paper is 35 m/min.
S3, gluing and compounding: coating adhesive on the corrugation peak of the corrugated paper core, wherein the coating amount of the adhesive is 1.2g/m3The paper pressing machine has the advantages that a relatively stable adhesive layer is formed among the surface paper, the corrugated paper core and the inner paper, the situation that the inner structures of the surface paper and the inner paper are softened due to the fact that glue excessively and deeply penetrates into the surface paper and the inner paper is avoided, the structural strength and the hardness of the corrugated paper are reduced, the surface paper and the inner paper are respectively pressed on two sides of the corrugated paper core, the pressure value is 2.3N, and the corrugated paper core is dried for 2 hours at 120 ℃.
S4, preparation of the waterproof paint: the waterproof coating is prepared from the components in the following table 1 according to the following method: putting the polyurethane emulsion and the film-forming assistant in corresponding parts by mass into a reaction kettle, stirring for 5min at the rotating speed of 500r/min, adding the talcum powder in corresponding parts by mass, continuing stirring for 5min, adding the defoaming agent and the paraffin emulsion in corresponding parts by mass, uniformly stirring for 5min, adding the preservative in corresponding parts by mass while stirring, raising the temperature to 35 ℃, and uniformly mixing to obtain the waterproof coating. In this example, the defoamer was polydimethylsiloxane. The mesh number of the talcum powder is 800 meshes.
S5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying for 3min at 55 ℃ to obtain the semi-finished waterproof corrugated paper.
S6, cutting the semi-finished waterproof corrugated paper: and cutting the dried semi-finished waterproof corrugated paper into finished waterproof corrugated paper by using a longitudinal and transverse cutting machine according to the required size.
Example 2
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 1's difference:
referring to fig. 1, the specific preparation method of the waterproof corrugated paper comprises the following steps:
s1, preparing a corrugated paper core: and heating the base paper by using a heater, wherein the preheating temperature is 103 ℃, the preheating time is 2.8 hours, and then embossing the heated base paper by using a corrugating roller to form the UV type corrugated paper core.
S2, surface paper and lining paper treatment: the surface paper and the lining paper are respectively preheated by a heating roller, the preheating temperature is 103 ℃, and the advancing speed of the surface paper and the lining paper is 36 m/min.
S3, gluing and compounding: coating adhesive on the corrugation peak of the corrugated paper core, wherein the coating amount of the adhesive is 1.2g/m3The paper is characterized in that a relatively stable adhesive layer is formed among the surface paper, the corrugated paper core and the inner paper, the situation that the inner structures of the surface paper and the inner paper are softened due to the fact that glue excessively and deeply penetrates into the surface paper and the inner paper is avoided, the structural strength and the hardness of the corrugated paper are reduced, the surface paper and the inner paper are respectively pressed on two sides of the corrugated paper core, the pressure value is 2.4N, and the corrugated paper is dried for 2.5 hours at 123 ℃.
S4, preparing a waterproof coating, wherein the waterproof coating is prepared from the components in the following table 1 according to the following method: putting the polyurethane emulsion and the film-forming assistant in corresponding parts by mass into a reaction kettle, stirring for 8min at a rotating speed of 600r/min, adding the talcum powder in corresponding parts by mass, continuing stirring for 8min, adding the defoaming agent and the paraffin emulsion in corresponding parts by mass, uniformly stirring for 5-8min, adding the preservative in corresponding parts by mass while stirring, raising the temperature to 38 ℃, and uniformly mixing to obtain the waterproof coating. In this example, the mesh number of talc powder is 1000 mesh. The defoaming agent is polydimethylsiloxane and polyether modified siloxane in a mass ratio of 1.2: 1 and mixtures thereof. The polydimethylsiloxane is XG2022 polydimethylsiloxane sold by Guangzhou Xin Guang chemical technology limited, and the polyether modified siloxane is SP-983 polyether modified siloxane sold by Guangzhou Xin Guang chemical technology limited.
S5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying for 5min at 57 ℃ to obtain the semi-finished waterproof corrugated paper.
S6, cutting the semi-finished waterproof corrugated paper: cutting the dried semi-finished waterproof corrugated paper into finished waterproof corrugated paper by using a longitudinal and transverse cutting machine according to the required size
In step S3, after the face paper and the liner paper are respectively pressed on both sides of the corrugated paper core, the corrugated paper core is preheated and then dried, wherein the preheating temperature is 110 ℃.
Example 3
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 2's difference:
the specific preparation method of the waterproof corrugated paper comprises the following steps:
s1, preparing a corrugated paper core: and heating the base paper by using a heater, wherein the preheating temperature is 104 ℃, the preheating time is 3 hours, and then embossing the heated base paper by using a corrugating roller to form the UV type corrugated paper core.
S2, surface paper and lining paper treatment: the surface paper and the lining paper are respectively preheated by a heating roller, the preheating temperature is 104 ℃, and the advancing speed of the surface paper and the lining paper is 38 m/min.
S3, gluing and compounding: coating adhesive on the corrugation peak of the corrugated paper core, wherein the coating amount of the adhesive is 1.3g/m3The paper is characterized in that a relatively stable adhesive layer is formed among the surface paper, the corrugated paper core and the inner paper, the situation that the surface paper and the inner paper are softened due to the fact that glue excessively and deeply penetrates into the surface paper and the inner paper is avoided, the structural strength and the hardness of the corrugated paper are reduced, the surface paper and the inner paper are respectively pressed on two sides of the corrugated paper core, the pressure value is 2.5N, and the corrugated paper is dried for 3 hours at 125 ℃.
S4, preparing a waterproof coating, wherein the components and parts by mass of the waterproof coating are shown in Table 1, and the waterproof coating is prepared from the components in Table 1 according to the following method: putting the polyurethane emulsion and the film-forming assistant in corresponding parts by mass into a reaction kettle, stirring for 10min at the rotating speed of 800r/min, adding the talcum powder in corresponding parts by mass, continuing stirring for 10min, adding the defoaming agent, the glass beads and the paraffin emulsion in corresponding parts by mass, uniformly stirring for 8min, adding the preservative in corresponding parts by mass while stirring, raising the temperature to 40 ℃, and uniformly mixing to obtain the waterproof coating. The diameter range of the glass beads was 0.05. mu.m. The mesh number of the talcum powder is 1250 meshes. The defoaming agent is polydimethylsiloxane and polyether modified siloxane in a mass ratio of 1.3: 1 and mixtures thereof.
S5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying for 6min at 58 ℃ to obtain the semi-finished waterproof corrugated paper.
S6, cutting the semi-finished waterproof corrugated paper: and cutting the dried semi-finished waterproof corrugated paper into finished waterproof corrugated paper by using a longitudinal and transverse cutting machine according to the required size.
In step S3, after the face paper and the liner paper are respectively pressed on both sides of the corrugated paper core, the corrugated paper core is preheated and then dried, wherein the preheating temperature is 113 ℃.
Example 4
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 3's difference:
in the specific preparation method steps of the waterproof corrugated paper, the diameter range of the glass beads is 0.1 mu m.
The defoaming agent is polydimethylsiloxane and polyether modified siloxane in a mass ratio of 1.4: 1 and mixtures thereof.
In step S3, after the face paper and the liner paper are respectively pressed on both sides of the corrugated paper core, the corrugated paper core is preheated and then dried, wherein the preheating temperature is 115 ℃.
Example 5
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 4's difference:
in the specific preparation method steps of the waterproof corrugated paper, the diameter range of the glass beads is 0.15 mu m.
Example 6
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 5's difference:
in step S4, the components and parts by mass of the waterproof coating are shown in table 1.
In the specific preparation method steps of the waterproof corrugated paper, the diameter range of the glass beads is 0.2 mu m.
Example 7
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 6's difference:
in step S4, the components and parts by mass of the waterproof coating are shown in table 1.
Example 8
The utility model provides a waterproof corrugated paper, the corrugated paper includes corrugated paper core and adhesion and is fixed in the facial tissue and the interior paper of two surfaces about the corrugated paper core, lies in with embodiment 7's difference:
in step S4, the components and parts by mass of the waterproof coating are shown in table 1.
Comparative example 1
The waterproof corrugated paper and the preparation method thereof are different from the embodiment 5 in that: the preparation method of the waterproof corrugated paper comprises the following steps:
s1, preparing a corrugated paper core: and heating the base paper by using a heater, wherein the preheating temperature is 110 ℃, the preheating time is 4h, and then embossing the heated base paper by using a corrugating roller to form the UV type corrugated paper core.
S2, surface paper and lining paper treatment: the surface paper and the lining paper are respectively preheated at the temperature of 102 ℃.
S3, gluing and compounding: and (3) coating an adhesive on the ridges of the corrugated paper core, respectively pressing the surface paper and the lining paper on the two sides of the corrugated paper core, wherein the pressure value is 2.3N, and drying for 2h at 130 ℃.
S4, preparing the waterproof coating.
S5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying for 10min at 60 ℃ to obtain the semi-finished waterproof corrugated paper.
S6, cutting the semi-finished waterproof corrugated paper: and cutting the dried semi-finished waterproof corrugated paper into finished waterproof corrugated paper by using a longitudinal and transverse cutting machine according to the required size.
Comparative example 2
The waterproof corrugated paper and the preparation method thereof are different from the embodiment 5 in that: in step S4, the defoaming agent is polydimethylsiloxane and polyether modified siloxane in a mass ratio of 2: 1, in a mixture of the components.
Comparative example 3
The waterproof corrugated paper and the preparation method thereof are different from the embodiment 5 in that: the mass part of the glass beads in the waterproof coating is 0.5 part.
Comparative example 4
The waterproof corrugated paper and the preparation method thereof are different from the embodiment 5 in that: the mass part of the glass beads in the waterproof coating is 2 parts.
Comparative example 5
The waterproof corrugated paper and the preparation method thereof are different from the embodiment 5 in that: the mesh number of the talcum powder is 325 meshes.
Comparative example 6
The waterproof corrugated paper and the preparation method thereof are different from the embodiment 5 in that: in step S4, the waterproof coating material includes the following components in parts by mass:
13 parts of polyurethane emulsion
10 portions of talcum powder
Film-forming assistant 1 part
0.5 portion of defoaming agent
0.5 part of paraffin emulsion
0.75 portion of preservative
And 1.4 parts of glass beads.
The test data of each example and comparative example are shown in table 2.
Corrugated paper was produced according to examples 1 to 8 and set as samples 1 to 8, corrugated paper was produced according to comparative examples 1 to 6 and set as samples 9 to 14, and the properties of the samples 1 to 14 were measured according to the following test methods, the corrugated paper was further immersed in tap water at 20 ± 2 ℃ for 1 hour (the sample was located at a position at least 30mm from the water surface), the properties of the samples 1 to 14 were measured again, and the test results were recorded in table 2:
1. water absorption capacity: the water repellency of samples 1 to 13 was tested according to GB/T1540-2002 "determination of Water absorbency of paper and paperboard".
2. Burst strength: the wear resistance of the samples 1 to 13 was tested according to GB/T6545-1998 method for determining the bursting strength of corrugated cardboard.
3. Puncture strength: the samples 1 to 13 were tested for puncture strength according to GB/T2679.7-2005, "determination of the puncture strength of cardboard".
4. Edge pressure strength: the test was carried out in accordance with GB/T6546-1998 "determination of edge crush strength of corrugated cardboard" to determine the edge crush strength of samples 1 to 13.
5. Smoothness: the smoothness of the samples 1-13 was tested according to the GB/T456-2002 paper and paperboard smoothness determination (Beck method), the greater the smoothness, the better the smoothness.
Table 2 results of performance testing of samples 1-14.
The defoamer used in sample 1 was polydimethylsiloxane, and the defoamers used in samples 2 to 8 were polydimethylsiloxane and polyether-modified siloxane compounded in a specific ratio, and it can be seen from the data in table 2 that the water absorption of sample 1 was greater than the water absorption of samples 2 to 8, and the smoothness of sample 1 was less than the smoothness of samples 2 to 8. Therefore, the polydimethylsiloxane and the polyether modified siloxane are compounded according to the mass ratio in a specific range to obtain the defoaming agent, so that micro bubbles in the waterproof coating can be further eliminated, a compact waterproof layer is formed on the corrugated paper by the waterproof coating, the waterproof performance of the waterproof layer is further improved, and meanwhile, the smoothness of the waterproof layer on the corrugated paper can be improved, so that the printing effect of subsequent corrugated paper is ensured.
The water absorption of sample 9 in table 2 is higher than that of sample 5, which shows that even if the water-proof paint is dried at 60 ℃ for 10min to cure, the water-proof layer formed by the water-proof paint on the surface paper or the lining paper is prone to crack, which easily results in the weakening of the water-proof function of the water-proof layer, even if other steps and the proportion of each component of the water-proof paint are the same as those of sample 5, so it can be known that the water-proof paint needs to be dried at 55-58 ℃ for 3-6min strictly, which is beneficial to ensuring the curing of the water-proof layer, and simultaneously is beneficial to reducing the cracking of the water-proof layer caused by overhigh temperature, which is beneficial to enhancing the water-proof and moisture-.
Sample 10 only changed the formulation of the polydimethylsiloxane and the polyether modified siloxane in the defoamer, but resulted in sample 10 having a water absorption of 2.26g/m2The reason is that the polydimethylsiloxane and the polyether modified siloxane are compounded according to the mass ratio in a specific range to obtain the defoaming agent, so that the micro bubbles in the waterproof coating can be further eliminated, and the waterproof coating can form a compact waterproof layer on the corrugated paper, so that the waterproof performance of the waterproof layer is further improved.
The mass part of the glass beads in the sample 11 is less than 1 part, the smoothness of the correspondingly prepared corrugated paper is smaller, the mass part of the glass beads in the sample 12 is more than 1.5 parts, the smoothness of the correspondingly prepared corrugated paper is not greatly different from that of the sample 11, but the wear resistance and the edge crush strength of the sample 12 are smaller than those of the sample 11, which shows that the mass part of the glass beads is controlled to be 1-1.5 parts, so that the surface of the corrugated paper coated with the waterproof coating is smooth, and the wear resistance, the edge crush strength and the puncture strength of the corrugated paper are guaranteed.
The mesh number of the talc powder in the sample 13 is small, so that even though the talc powder can be filled in the gap of the coarse aggregate, the filling effect is poor due to the small mesh number, and thus the wear resistance, the edge crush strength and the puncture strength of the prepared corrugated paper are small, which means that the mesh number of the talc powder is controlled to be 800-1250 mesh, which is beneficial to ensuring the filling uniformity and the filling compactness of the talc powder.
In Table 2, the water absorption capacity of sample 14 was 5.14g/m2And is much larger than the water absorption amounts of samples 1 to 8, which shows that the waterproof coating material obtained is inferior in waterproof property when the proportions of the respective components are out of the range of the present invention even though the respective components of the waterproof coating material are the same. When the components are compounded according to the specific proportion, the waterproof coating is coated on corrugated paper to form a waterproof layer, and the waterproof layer has a better waterproof effect.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.
Claims (10)
1. A preparation method of waterproof corrugated paper is characterized by comprising the following steps: the preparation method of the waterproof corrugated paper comprises the following steps:
s1, preparing a corrugated paper core: heating the base paper by a heater, wherein the preheating temperature is 102-104 ℃, the preheating time is 2.5-3h, and then embossing the heated base paper by a corrugating roller to form a UV type corrugated paper core;
s2, surface paper and lining paper treatment: respectively carrying out preheating treatment on the surface paper and the lining paper, wherein the preheating temperature is 102-104 ℃;
s3, gluing and compounding: coating an adhesive on the ridges of the corrugated paper core, respectively pressing the surface paper and the lining paper on the two sides of the corrugated paper core, wherein the pressure value range is between 2.3 and 2.5N, and drying for 2 to 3 hours at the temperature of 120-;
s4, preparing a waterproof coating;
s5, coating a waterproof coating: uniformly coating a layer of waterproof coating on the surfaces of the surface paper and the lining paper, which are far away from the corrugated paper core, so that the surface paper and the lining paper form a waterproof layer on one side, which is far away from the corrugated paper core, and then drying at 55-58 ℃ for 3-6min to obtain a semi-finished waterproof corrugated paper;
s6, cutting the semi-finished waterproof corrugated paper: and cutting the dried semi-finished waterproof corrugated paper into finished waterproof corrugated paper by using a longitudinal and transverse cutting machine according to the required size.
2. The method for preparing the waterproof corrugated paper as claimed in claim 1, wherein the method comprises the following steps: in step S3, after the surface paper and the inner paper are respectively laminated on both sides of the corrugated paper core, the corrugated paper core is preheated and then dried, wherein the preheating temperature is 110-.
3. The method for preparing the waterproof corrugated paper as claimed in claim 1, wherein the method comprises the following steps: in step S4, the waterproof coating material includes the following components in parts by mass:
10-15 parts of polyurethane emulsion
4-8 parts of talcum powder
2.5-3 parts of film-forming assistant
1-2 parts of defoaming agent
1-1.5 parts of paraffin emulsion
0.5-1 part of preservative.
4. A method of making water-resistant corrugated paper as defined in claim 3, wherein: in step S4, the waterproof coating material includes the following components in parts by mass:
11-14 parts of polyurethane emulsion
5-7 parts of talcum powder
2.5-2.8 parts of film-forming additive
1.2 to 1.9 portions of defoaming agent
1-1.5 parts of paraffin emulsion
0.5-1 part of preservative.
5. The method for preparing the waterproof corrugated paper as claimed in claim 4, wherein the method comprises the following steps: in step S4, the waterproof coating material includes the following components in parts by mass:
13 parts of polyurethane emulsion
6 portions of talcum powder
Film-forming assistant 2.7 parts
1.8 portions of defoaming agent
1.4 parts of paraffin emulsion
0.75 part of preservative.
6. The method for preparing the waterproof corrugated paper as claimed in claim 5, wherein the method comprises the following steps: the waterproof coating also comprises 1-1.5 parts by mass of glass beads.
7. The method for preparing the waterproof corrugated paper as claimed in claim 6, wherein the method comprises the following steps: the diameter range of the glass beads is 0.05-0.2 mu m.
8. A method of making water-resistant corrugated paper as defined in claim 3, wherein: the mesh number of the talcum powder is 800-1250 meshes.
9. The method for preparing the waterproof corrugated paper as claimed in claim 8, wherein the method comprises the following steps: the defoaming agent is composed of polydimethylsiloxane and polyether modified siloxane according to the mass ratio of (1.2-1.4): 1, in a mixture of the components.
10. The utility model provides a waterproof corrugated paper, characterized by: the method for preparing the waterproof corrugated paper according to any one of claims 1 to 9.
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| CN111851148A (en) * | 2020-08-11 | 2020-10-30 | 烟台鸿特新材料有限公司 | Waterproof composite paper and processing technology |
| CN112140680A (en) * | 2020-09-14 | 2020-12-29 | 北京鉴真保鲜科技有限公司 | Corrugated paper for adsorbing pesticide residues on fruits and vegetables and preparation method thereof |
| CN112523005A (en) * | 2020-11-23 | 2021-03-19 | 东莞顺裕纸业有限公司 | Composite corrugated paper and preparation method thereof |
| CN112553964A (en) * | 2020-11-03 | 2021-03-26 | 义乌市义南纸业有限公司 | Highly water-resistant corrugated base paper for vegetable packaging and preparation method thereof |
| CN113502676A (en) * | 2021-07-06 | 2021-10-15 | 江苏洋河集团包装材料有限公司 | Production process of damp-proof and water-proof corrugated carton for packaging white spirit |
| CN114108373A (en) * | 2021-12-08 | 2022-03-01 | 王勇 | Processing technology of damp-proof corrugated paper |
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| CN111851148A (en) * | 2020-08-11 | 2020-10-30 | 烟台鸿特新材料有限公司 | Waterproof composite paper and processing technology |
| CN112140680A (en) * | 2020-09-14 | 2020-12-29 | 北京鉴真保鲜科技有限公司 | Corrugated paper for adsorbing pesticide residues on fruits and vegetables and preparation method thereof |
| CN112553964A (en) * | 2020-11-03 | 2021-03-26 | 义乌市义南纸业有限公司 | Highly water-resistant corrugated base paper for vegetable packaging and preparation method thereof |
| CN112523005A (en) * | 2020-11-23 | 2021-03-19 | 东莞顺裕纸业有限公司 | Composite corrugated paper and preparation method thereof |
| CN113502676A (en) * | 2021-07-06 | 2021-10-15 | 江苏洋河集团包装材料有限公司 | Production process of damp-proof and water-proof corrugated carton for packaging white spirit |
| CN114108373A (en) * | 2021-12-08 | 2022-03-01 | 王勇 | Processing technology of damp-proof corrugated paper |
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