Plastic-paper-free environment-friendly composite structure with heat sealing performance and preparation method of plastic-paper-free environment-friendly composite structure

Abstract

The invention discloses a plastic-free paper environment-friendly composite structure with heat sealing performance and a preparation method, the plastic-free paper environment-friendly composite structure comprises a base layer, a first stripping layer, a first environment-friendly layer, a second stripping layer and a second environment-friendly layer, one end of the first stripping layer is bent to form a first covering part mounted on the end face of the base layer, and the other end of the first stripping layer is bent to form a second covering part; one end of the first environment-friendly layer is bent to form a second covering part installed on the outer side of the first covering part, one end of the second stripping layer is bent to form a third covering part installed on the outer side of the second covering part, and one end of the second environment-friendly layer is bent to form a third covering part installed on the outer side of the third covering part. The environment-friendly floor is simple in structure, the first environment-friendly layer and the second environment-friendly layer are arranged, after the second environment-friendly layer is torn down, the first environment-friendly layer can be continuously used and can be repeatedly used, the first environment-friendly layer and the second environment-friendly layer can be removed in a stripping mode, stains adhering to the first environment-friendly layer and the second environment-friendly layer are prevented from being recycled together with the base layer, and the environment-friendly floor is environmentally friendly. The influence on the treatment efficiency due to the stirring of stains and a base layer is avoided.

Description

Technical Field

[0001] The invention relates to a plastic-free paper environmentally friendly composite structure with heat-sealing performance and a preparation method thereof. Background Art

[0002] Plastic-free paper (also known as plastic-free coated paper or environmentally friendly plastic-free coated paper) is a type of paper that uses environmentally friendly materials to replace traditional plastic coatings. It has the characteristics of being biodegradable, recyclable, and environmentally friendly.

[0003] However, the current plastic-free paper has a simple structure. When the plastic-free paper is produced into storage containers such as water cups, the coating on its inner surface is designed as an integral part of the base layer. During subsequent recycling and reuse, the coating is not disassembled, causing the stains on the coating to be recycled as well, affecting the quality of the paper pulp. In addition, the paper can only be used once, affecting its service life. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a plastic-free paper environmentally friendly composite structure with heat-sealing performance and a preparation method, which is provided with a first peeling layer and a second peeling layer to enable the first environmentally friendly layer and the second environmentally friendly layer to be quickly disassembled to solve the problems raised in the above background technology.

[0005] The present invention is achieved through the following technical solution: a plastic-free paper environmentally friendly composite structure with heat-sealing performance, comprising a base layer, a first peeling layer, a first environmentally friendly layer, a second peeling layer and a second environmentally friendly layer, wherein the first peeling layer, the first environmentally friendly layer, the second peeling layer and the second environmentally friendly layer are sequentially arranged on the outside of the base layer, one end of the first peeling layer is bent to form a first covering portion installed on the end surface of the base layer, one end of the first environmentally friendly layer is bent to form a second covering portion installed on the outside of the first covering portion, one end of the second peeling layer is bent to form a third covering portion installed on the outside of the second covering portion, and one end of the second environmentally friendly layer is bent to form a third covering portion installed on the outside of the third covering portion.

[0006] As a preferred technical solution, the first peeling layer is arranged on the surface of the base layer, the first environmental protection layer is arranged on the surface of the first peeling layer, the second peeling layer is arranged outside the first environmental protection layer and parallel to it, and the second buffer environmental protection layer is arranged on the surface of the second peeling layer.

[0007] As a preferred technical solution, a plurality of fixing parts are formed on one side of the second peeling layer facing the first environmental protection layer, and the other ends of the fixing parts are all adhered and fixed to the first environmental protection layer.

[0008] As a preferred technical solution, the first peeling layer and the second peeling layer are both made of seaweed-based plastic-free packaging materials.

[0009] As a preferred technical solution, the first environmental protection layer and the second environmental protection layer are both water-based acrylic coatings.

[0010] As a preferred technical solution, the first covering part is provided with a first groove for peeling off the first environmental protection layer outwards, and the third covering part is provided with a second groove for peeling off the second environmental protection layer outwards.

[0011] The present invention provides an environmentally friendly method for preparing plastic-free paper with heat-sealing properties, comprising the following steps:

[0012] S1. Selecting a paper material as a base layer, producing a first peeling layer and a second peeling layer through a seaweed-based plastic-free packaging material to form a whole tough film, wherein the first peeling layer is adhered and fixed to the surface of the base layer, and multiple areas of the second peeling layer are thickened to form fixed portions;

[0013] S2, the first and second environmentally friendly layers are made of water-based acrylic emulsion and sprayed on the surface of the first and second peeling layers to form a dense hydrophobic layer. By introducing styrene-acrylic acid copolymer or vinyl monomer, the heat sealing starting temperature is reduced to 80-110°C, and nano zinc oxide or polyhexamethylene biguanide (PHMB) is added, and the antibacterial rate against Escherichia coli is ≥99%;

[0014] S3, the fixing portion is adhered and fixed to the surface of the first environmental protection layer, and the contact area between the fixing portion and the first environmental protection layer is reduced by the fixing portion. The fixing portion is removed from the second peeling layer, and the remaining area is sprayed with a natural hydrophobic material to reduce surface adhesion;

[0015] S4. A first environmental protection layer is sprayed on the surface of the first peeling layer and covers the first covering portion. A second environmental protection layer is sprayed on the surface of the second peeling layer and covers the third covering portion.

[0016] The beneficial effects of the present invention are as follows: the present invention has a simple structure, is provided with a first environmental protection layer and a second environmental protection layer, and after the second environmental protection layer is torn off, the first environmental protection layer can continue to be used and can be used multiple times, and the first and second environmental protection layers can be removed by peeling, thereby avoiding stains stuck on the first and second environmental protection layers from being recycled together with the base layer, avoiding affecting the processing efficiency due to the stains being mixed with the base layer, and increasing the hydrophobicity at the edge by the second covering part and the fourth covering part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 is a side view of the present invention;

[0020] Figure 3 This is a design structure diagram of the first groove and the second groove of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the second peeling layer of the present invention.

[0022] Among them, 1. base layer; 2. first peeling layer; 3. first environmental protection layer; 4. second peeling layer; 5. second environmental protection layer; 6. first covering part; 7. second covering part; 8. third covering part; 9. fourth covering part; 10. fixing part; 11. first groove; 12. second groove. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0025] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0026] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a plastic-free paper environmentally friendly composite structure with heat-sealing performance of the present invention includes a base layer 1, a first peeling layer 2, a first environmental protection layer 3, a second peeling layer 4 and a second environmental protection layer 5, wherein the first peeling layer 2, the first environmental protection layer 3, the second peeling layer 4 and the second environmental protection layer 5 are sequentially arranged on the outside of the base layer 1, one end of the first peeling layer 2 is bent to form a first covering portion 6 installed on the end surface of the base layer 1, one end of the first environmental protection layer 3 is bent to form a second covering portion 7 installed on the outside of the first covering portion 6, one end of the second peeling layer 4 is bent to form a third covering portion 8 installed on the outside of the second covering portion 7, and one end of the second environmental protection layer 5 is bent to form a third covering portion 8 installed on the outside of the third covering portion 8.

[0027] In this embodiment, the first peeling layer 2 is arranged on the surface of the base layer 1, the first environmental protection layer 3 is arranged on the surface of the first peeling layer 2, the second peeling layer 4 is arranged outside the first environmental protection layer 3 and parallel to it, and the second buffer environmental protection layer is arranged on the surface of the second peeling layer 4.

[0028] In this embodiment, a plurality of fixing portions 10 are protruded from one side of the second peeling layer 4 facing the first environmental protection layer 3 , and the other ends of the fixing portions 10 are all adhered and fixed to the first environmental protection layer 3 .

[0029] In this embodiment, the first peeling layer 2 and the second peeling layer 4 are both made of seaweed-based plastic-free packaging materials.

[0030] In this embodiment, the first environmental protection layer 3 and the second environmental protection layer 5 are both water-based acrylic coatings, and the water resistance can reach Cobb value ≤ 5g / m 2 (30 minutes test), close to the effect of PE coated paper;

[0031] The oil-proof grade reaches Kit Test 12 (ASTM standard) and can withstand hot coffee and greasy foods.

[0032] In this embodiment, a first groove 11 for peeling off the first environmental protection layer is provided on the first covering portion 6, and a second groove 12 for peeling off the second environmental protection layer is provided on the third covering portion 8. The first groove and the second groove can provide a gap at the edge of the first environmental protection layer and the second environmental protection layer that is not connected to the first peeling layer and the second peeling layer, so that a fingernail can be inserted into the interior of the first peeling layer or the second peeling layer, making it convenient to tear off the first peeling layer and the second peeling layer.

[0033] A method for preparing an environmentally friendly plastic-free paper with heat-sealing properties comprises the following steps:

[0034] S1. Select a paper material as the base layer 1, and produce a first peeling layer 2 and a second peeling layer 4 through the seaweed-based plastic-free packaging material to form a whole tough film. The first peeling layer 2 is adhered and fixed to the surface of the base layer 1, and multiple areas of the second peeling layer 4 are thickened to form fixing portions 10;

[0035] S2, the first environmental protection layer 3 and the second environmental protection layer 5 are made of water-based acrylic emulsion and sprayed on the surface of the first peeling layer 2 and the second peeling layer 4 to form a dense hydrophobic layer. By introducing styrene-acrylic acid copolymer or vinyl monomer, the heat sealing starting temperature is reduced to 80-110°C, and nano zinc oxide or polyhexamethylene biguanide (PHMB) is added to achieve an antibacterial rate of ≥99% against Escherichia coli.

[0036] S3. The fixing portion 10 is adhered and fixed to the surface of the first environmental protection layer 3. The fixing portion 10 reduces the contact area between the second peeling layer 4 and the first environmental protection layer 3. The fixing portion 10 is removed from the second peeling layer 4. The remaining area is sprayed with a natural hydrophobic material to reduce surface adhesion. Only the fixing portion of the second peeling layer contacts the first environmental protection layer. The remaining area does not contact the first environmental protection layer, reducing the contact area and facilitating the subsequent peeling of the second environmental protection layer.

[0037] S4 , the first environmental protection layer 3 is sprayed on the surface of the first peeling layer 2 and covers the first covering portion 6 , and the second environmental protection layer 5 is sprayed on the surface of the second peeling layer 4 and covers the third covering portion 8 .

[0038] When the device is manufactured into a container such as a water cup, the second environmentally friendly layer is disposed inside the first environmentally friendly layer. Therefore, the liquid or object poured into the container first contacts the second environmentally friendly layer and does not contact the first environmentally friendly layer. The fourth covering portion can wrap around the edge of the container, thereby increasing the hydrophobicity of the edge.

[0039] When pouring another liquid or object, in order to avoid the previous liquid affecting the current liquid, the user can insert a finger into the second groove and peel off the second peeling layer from the first environmental protection layer, thereby removing the second environmental protection layer so that the subsequent liquid can contact the first environmental protection layer, thus reducing the replacement efficiency of the water cup and increasing the service life.

[0040] Among them, since the second peeling layer and the first environmental protection layer are adhered to each other through the fixing portion, the adhesion area is small, and when peeling, the first peeling layer is prevented from being torn off from the base layer;

[0041] When the base layer needs to be recycled, it can be torn off from the base layer through the first groove through the first peeling layer, so that the stains remaining on the first environmental protection layer are not recycled synchronously with the base layer, reducing the impurities remaining after the subsequent dissolution of the base layer and increasing the quality after reuse.

[0042] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. A plastic-free paper environmentally friendly composite structure with heat-sealing properties, characterized by: The invention comprises a base layer (1), a first peeling layer (2), a first environmental protection layer (3), a second peeling layer (4) and a second environmental protection layer (5), wherein the first peeling layer (2), the first environmental protection layer (3), the second peeling layer (4) and the second environmental protection layer (5) are sequentially arranged on the outside of the base layer (1), one end of the first peeling layer (2) is bent to form a first covering portion (6) installed on the end face of the base layer (1), one end of the first environmental protection layer (3) is bent to form a second covering portion (7) installed on the outside of the first covering portion (6), one end of the second peeling layer (4) is bent to form a third covering portion (8) installed on the outside of the second covering portion (7), and one end of the second environmental protection layer (5) is bent to form a third covering portion (8) installed on the outside of the third covering portion (8).

2. The heat-sealing plastic-free paper environmentally friendly composite structure according to claim 1, characterized in that: The first peeling layer (2) is arranged on the surface of the base layer (1), the first environmental protection layer (3) is arranged on the surface of the first peeling layer (2), the second peeling layer (4) is arranged outside the first environmental protection layer (3) and parallel to it, and the second slow environmental protection layer is arranged on the surface of the second peeling layer (4).

3. The heat-sealing plastic-free paper environmentally friendly composite structure according to claim 1, characterized in that: The second peeling layer (4) protrudes on one side surface facing the first environmental protection layer (3) to form a plurality of fixing parts (10), and the other ends of the fixing parts (10) are all adhered and fixed on the first environmental protection layer (3).

4. The heat-sealing plastic-free paper environmentally friendly composite structure according to claim 1, characterized in that: The first peeling layer (2) and the second peeling layer (4) are both made of seaweed-based plastic-free packaging material.

5. The environmentally friendly plastic-free paper composite structure with heat-sealing properties according to claim 1, characterized in that: The first environmental protection layer (3) and the second environmental protection layer (5) are both water-based acrylic coatings.

6. The environmentally friendly plastic-free paper composite structure with heat-sealing properties according to claim 1, characterized in that: The first covering portion (6) is provided with a first groove (11) for peeling off the first environmental protection layer outwards, and the third covering portion (8) is provided with a second groove (12) for peeling off the second environmental protection layer outwards.

7. The environmentally friendly method for preparing plastic-free paper with heat-sealing properties according to any one of claims 1 to 6, characterized in that: The steps include: S1. Selecting a paper material as a base layer (1), producing a first peeling layer (2) and a second peeling layer (4) through a seaweed-based plastic-free packaging material to form a whole sheet of tough film, wherein the first peeling layer (2) is adhered and fixed to the surface of the base layer (1), and multiple areas on the second peeling layer (4) are thickened to form a fixing portion (10); S2, the first environmental protection layer (3) and the second environmental protection layer (5) are made of water-based acrylic emulsion and are sprayed on the surface of the first peeling layer (2) and the second peeling layer (4) to form a dense hydrophobic layer. By introducing styrene-acrylic acid copolymer or vinyl monomer, the heat sealing starting temperature is reduced to 80-110°C, and nano zinc oxide or polyhexamethylene biguanide (PHMB) is added, and the antibacterial rate against Escherichia coli is ≥99%; S3, the fixing portion (10) is adhered and fixed on the surface of the first environmental protection layer (3), and the contact area between the fixing portion (10) and the first environmental protection layer (3) is reduced. The second peeling layer (4) removes the fixing portion (10), and the remaining area is sprayed with a natural hydrophobic material to reduce surface adhesion; S4. The first environmental protection layer (3) is sprayed on the surface of the first peeling layer (2) and covers the first covering portion (6). The second environmental protection layer (5) is sprayed on the surface of the second peeling layer (4) and covers the third covering portion (8).

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