Moisture-proof breathable lining paper and processing technology thereof

Abstract

The invention discloses moisture-proof and breathable lining paper which comprises a paper-based base material, a moisture-proof layer and a breathable layer, the moisture-proof layer is coated on the surface of the paper-based base material and comprises a first polymer coating, a second polymer coating and a third polymer coating, and each of the first polymer coating, the second polymer coating and the third polymer coating comprises a polymer base material and metal oxidation powder embedded in the polymer base material; and the honeycomb membrane layer is arranged on the surface of the damp-proof layer and is provided with nano honeycomb holes. The first polymer coating, the second polymer coating and the third polymer coating are roller-coated on the surface of the paper-based base material to form the damp-proof layer, and then the nano honeycomb net-shaped aluminum foil layer is attached to the damp-proof layer, so that the damp-proof air permeability of the lining paper is improved, and the durability is enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of lining paper, and in particular relates to a moisture-proof and breathable lining paper and a processing technology thereof. Background Art

[0002] Liner paper is the inner packaging material for cigarettes. Existing composite aluminum foil paper for cigarette packaging is made by combining base paper and aluminum foil and then cutting them according to specifications. The products are relatively simple, difficult to degrade and recycle, and have high production costs.

[0003] In order to make the inner lining paper have good moisture-proof, aroma-preserving and structural supporting effects, the inner lining paper in the prior art mainly adopts composite aluminum foil inner lining paper. However, the composite aluminum foil paper uses a large amount of aluminum, which leads to excessively high cost. At the same time, its recycling and processing problem is one of the unresolved problems. Therefore, some cigarette packaging now begins to use vacuum aluminized paper. The vacuum aluminized paper forms an aluminum coating with a thickness of 0.025-0.055 microns on the paper surface by a direct method or a transfer method. It is easy to degrade and has a lower raw material cost. However, at the same time, since the thickness of the aluminum coating layer is too low, the unevenness of the paper surface or the creeping of the rubber surface during the processing will cause local damage to the aluminum coating layer, resulting in the vacuum aluminized paper. The moisture-proof performance is not as good as that of the traditional composite aluminum foil inner lining paper, which results in the vacuum aluminum foil paper being unable to achieve a good moisture-proof preservation effect. In order to solve the above problems, the present invention provides the following technical solutions. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide a moisture-proof and breathable lining paper and its processing technology, by roller coating a first polymer coating, a second polymer coating, and a third polymer coating on the surface of a paper-based substrate to form a moisture-proof layer, and then attaching a nano honeycomb mesh aluminum foil layer to improve the moisture-proof and breathable properties of the lining paper and enhance its durability.

[0005] In order to solve the above technical problems, the present invention discloses a moisture-proof and breathable lining paper, which comprises: Paper-based substrate; A moisture-proof layer coated on the surface of a paper-based substrate, the moisture-proof layer comprising a first polymer coating, a second polymer coating, and a third polymer coating, wherein the first polymer coating, the second polymer coating, and the third polymer coating all comprise a polymer base material and a metal oxide powder embedded in the polymer base material; The honeycomb membrane layer is arranged on the surface of the moisture-proof layer, and the honeycomb membrane layer has nano honeycomb holes.

[0006] According to one embodiment of the present invention, the polymer base material is configured as a polylactic acid material, and the polylactic acid material is based on at least one type of corn.

[0007] According to one embodiment of the present invention, the metal oxide powder is configured to be one or both of aluminum oxide and titanium oxide.

[0008] According to one embodiment of the present invention, the content of the above-mentioned metal oxide powder accounts for 4%-7% of the polymer base material.

[0009] According to one embodiment of the present invention, the surface of the moisture-proof layer is treated with corona or plasma before the honeycomb film layer is adhered.

[0010] According to one embodiment of the present invention, the honeycomb membrane layer is configured as an aluminum foil membrane.

[0011] According to one embodiment of the present invention, the paper-based substrate base paper is selected from one of ordinary type, silver-white transfer type, transparent type, high-gloss type, laser type, and direct-plating type lining paper.

[0012] According to one embodiment of the present invention, the moisture-proof layer has a thickness of 15-30 μm.

[0013] The present invention also discloses a processing technology of moisture-proof and breathable lining paper, comprising: Step a. providing a fiber-reinforced paper-based substrate, and sequentially coating the paper-based substrate with a first polymer coating, a second polymer coating, and a third polymer coating of a moisture-proof layer at a speed of 150-250 m / min, 60-80 lines / cm, and a printing screen roller at a depth of 40-55 μm, wherein the moisture-proof layer has a thickness of 15-30 μm; Step b. Maintaining the speed of 150-250m / min, drying the moisture barrier layer by hot air at a temperature of 45-100°C; then corona or plasma treatment of the surface; Step c. preparing a honeycomb film layer, punching holes on the surface of the aluminum foil film layer by a nano laser device to form nano honeycomb holes; Step d. maintaining the machine speed at 150-250 m / min, and compounding the honeycomb film layer onto the moisture-proof layer by thermal transfer to obtain a semi-finished product; Step e. Cut the semi-finished products and finally put them into storage.

[0014] Compared with the prior art, the present invention can achieve the following technical effects: The first polymer coating, the second polymer coating, and the third polymer coating are roller-coated on the surface of the paper-based substrate to form a moisture-proof layer, and then a nano honeycomb mesh aluminum foil layer is attached to improve the moisture-proof and air-permeability of the lining paper and enhance its durability.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the structure of moisture-proof and breathable lining paper according to an embodiment of the present invention. Figure ID

[0017] Paper-based substrate 10 , moisture-proof layer 20 , first polymer coating 21 , second polymer coating 22 , third polymer coating 23 , honeycomb network layer 30 . DETAILED DESCRIPTION

[0018] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0019] Please refer to Figure 1 , Figure 1 It is a schematic diagram of the structure of moisture-proof and breathable lining paper according to an embodiment of the present invention.

[0020] As shown in the figure, a moisture-proof and breathable lining paper comprises: a paper-based substrate 10; a moisture-proof layer 20 coated on the surface of the paper-based substrate 10, the moisture-proof layer 20 comprises a first polymer coating 21, a second polymer coating 22, and a third polymer coating 23, wherein the first polymer coating 21, the second polymer coating 22, and the third polymer coating 23 all comprise a polymer base material and a metal oxide powder embedded in the polymer base material; a honeycomb membrane layer 30 disposed on the surface of the moisture-proof layer 20, the honeycomb membrane layer 30 having nano honeycomb pores.

[0021] In one embodiment of the present invention, the base paper of the paper-based substrate 10 is selected from one of ordinary type, silver-white transfer type, transparent type, high gloss type, laser type, and direct plating type lining paper, and is widely used. The moisture-proof layer 20 is composed of a first polymer coating 21, a second polymer coating 22, and a third polymer coating 23, which provides a barrier for the exchange of moisture and air through the paper-based substrate 10 of the moisture-proof layer 20, and realizes the moisture-proof and breathable function. It is composed of a polymer base material and a metal oxide powder embedded in the polymer base material. The honeycomb film layer 30 is set as an aluminum foil film to enhance its durability, and its honeycomb mesh design fully guarantees the working use of the inner moisture-proof layer 20, and the moisture absorption and moisture-proof effect will be better, and the honeycomb mesh makes the aluminum foil layer more ductile, and at the same time has a certain anti-counterfeiting property.

[0022] In a preferred embodiment, the polymer base material is a polylactic acid material, which has good air permeability, oxygen permeability and carbon dioxide permeability, and also has the characteristic of isolating odor. Furthermore, the polylactic acid material is based on at least one kind of corn, and corn starch can enhance the strength of paper, and has good water resistance and wear resistance, so that the paper is not easy to break when folded and is more durable.

[0023] In addition, the metal oxide powder is set to one or two of aluminum oxide and titanium oxide, which are melted with the polymer base material to form a coating, which can enhance the drying property of the coating, and thus the moisture-proof effect will be further improved.

[0024] Preferably, the content of metal oxide powder accounts for 4%-7% of the polymer base material, ensuring dryness and moisture resistance while avoiding excessive content that affects coating roller coating.

[0025] Before adhering the honeycomb film layer 30 , the surface of the moisture-proof layer 20 is treated with corona or plasma to remove dust and static electricity.

[0026] Preferably, the moisture-proof layer 20 has a thickness of 15-30 μm, and the molded lining paper is thinner and more practical. Example 1

[0027] A processing technology for moisture-proof and breathable lining paper, comprising: Step a. providing a fiber-reinforced paper-based substrate, and sequentially coating the paper-based substrate with a first polymer coating, a second polymer coating, and a third polymer coating of a moisture-proof layer at a speed of 150-250 m / min, 60-80 lines / cm, and a printing screen roller at a depth of 40-55 μm, wherein the moisture-proof layer has a thickness of 15-30 μm; Step b. Maintaining the speed of 150-250m / min, drying the moisture barrier layer by hot air at a temperature of 45-100°C; then corona or plasma treatment of the surface; Step c. preparing a honeycomb film layer, punching holes on the surface of the aluminum foil film layer by a nano laser device to form nano honeycomb holes; Step d. maintaining the machine speed at 150-250 m / min, and compounding the honeycomb film layer onto the moisture-proof layer by thermal transfer to obtain a semi-finished product; Step e. Cut the semi-finished products and finally put them into storage. Example 2

[0028] A processing technology for moisture-proof and breathable lining paper, comprising: Step a. providing a fiber-reinforced paper-based substrate, and sequentially coating the paper-based substrate with a first polymer coating, a second polymer coating, and a third polymer coating of a moisture-proof layer at a speed of 150-250 m / min, 60-80 lines / cm, and a printing screen roller at a depth of 40-55 μm, wherein the moisture-proof layer has a thickness of 15-30 μm; Step b. Maintaining the speed of 150-250m / min, drying the moisture barrier layer by hot air at a temperature of 45-100°C; then corona or plasma treatment of the surface; Step c. maintaining the machine speed at 150-250 m / min, and laminating the aluminum foil layer to the moisture-proof layer by thermal transfer to obtain a semi-finished product; Step e. Cut the semi-finished products and finally put them into storage. Example 3

[0029] A processing technology for moisture-proof and breathable lining paper, comprising: Step a. Providing a fiber-reinforced paper-based substrate, the paper-based substrate is coated with a normal moisture-proof layer by a printing screen roller at a machine speed of 150-250m / min, 60-80 lines / cm, and a depth of 40-55μm; Step b. Maintaining the speed of 150-250m / min, drying the moisture barrier layer by hot air at a temperature of 45-100°C; then corona or plasma treatment of the surface; Step c. preparing a honeycomb film layer, punching holes on the surface of the aluminum foil film layer by a nano laser device to form nano honeycomb holes; Step d. maintaining the machine speed at 150-250 m / min, and compounding the honeycomb film layer onto the moisture-proof layer by thermal transfer to obtain a semi-finished product; Step e. Cut the semi-finished products and finally put them into storage.

[0030] By comparing the three embodiments and conducting moisture-proof and breathable tests, it was found that the moisture-proof effect of embodiment 1 is greater than that of embodiment 2 and embodiment 3. Embodiment 2 has lower moisture-proof property because the aluminum foil layer is not nano-perforated. Embodiment 3 is selected from ordinary moisture-proof layers on the market, and has poor moisture-proof effect.

[0031] In summary, the present invention forms a moisture-proof layer by roller coating the first polymer coating, the second polymer coating, and the third polymer coating on the surface of the paper-based substrate, and then attaches a nano honeycomb mesh aluminum foil layer to improve the moisture-proof and air-permeability of the lining paper and enhance its durability.

[0032] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A moisture-proof and breathable lining paper, characterized in that: include: Paper-based substrate; A moisture-proof layer coated on the surface of the paper-based substrate, the moisture-proof layer comprising a first polymer coating, a second polymer coating, and a third polymer coating, wherein the first polymer coating, the second polymer coating, and the third polymer coating all comprise a polymer base material and a metal oxide powder embedded in the polymer base material; A honeycomb membrane layer is arranged on the surface of the moisture-proof layer, and the honeycomb membrane layer has nano honeycomb holes.

2. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The polymer base material is set to be a polylactic acid material, and the polylactic acid material is based on at least one type of corn.

3. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The metal oxide powder is configured to be one or both of aluminum oxide and titanium oxide.

4. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The content of the metal oxide powder is 4%-7% of the polymer base material.

5. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The moisture barrier layer is treated with corona or plasma before adhering the honeycomb film layer.

6. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The honeycomb membrane layer is configured as an aluminum foil membrane.

7. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The paper-based substrate base paper is selected from one of ordinary type, silver-white transfer type, transparent type, high-gloss type, laser type, and direct-plating type lining paper.

8. The moisture-proof and breathable lining paper according to claim 1, characterized in that: The moisture-proof layer has a thickness of 15-30 μm.

9. A process for processing the moisture-proof and breathable lining paper according to claim 1, characterized in that: include: Step a. providing a fiber-reinforced paper-based substrate, and sequentially coating the paper-based substrate with a first polymer coating, a second polymer coating, and a third polymer coating of a moisture-proof layer at a speed of 150-250 m / min, 60-80 lines / cm, and a printing screen roller at a depth of 40-55 μm, wherein the moisture-proof layer has a thickness of 15-30 μm; Step b. Maintaining the speed of 150-250m / min, drying the moisture barrier layer by hot air at a temperature of 45-100°C; then corona or plasma treatment of the surface; Step c. preparing a honeycomb film layer, punching holes on the surface of the aluminum foil film layer by a nano laser device to form nano honeycomb holes; Step d. maintaining the machine speed at 150-250 m / min, and compounding the honeycomb film layer onto the moisture-proof layer by thermal transfer to obtain a semi-finished product; Step e. Cut the semi-finished products and finally put them into storage.

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