Waterproof kraft paper

Abstract

The utility model discloses waterproof kraft paper, relates to the technical field of kraft paper, and aims to solve the problems that cowhide is poor in waterproof effect and easy to crack. According to the key points of the technical scheme, the anti-tear fabric comprises a base layer, anti-tear layers which are mutually symmetrical are arranged on the upper side and the lower side of the base layer, a flame-retardant layer is arranged on the side, away from the base layer, of each anti-tear layer, a plurality of supporting pieces which are mutually staggered are arranged between the base layer and the anti-tear layers, and a waterproof layer is connected to the side, away from the anti-tear layers, of each flame-retardant layer. According to the utility model, by arranging the anti-tearing layer and the plurality of supporting sheets, the anti-tearing capability of the kraft paper is enhanced, the kraft paper is not easy to deform, the kraft paper is prevented from being broken in the use process, by arranging the flame-retardant layer, the fireproof effect of the kraft paper is improved, so that the application range of the kraft paper is wider, and the waterproof layers are arranged on the two sides of the kraft paper, so that the kraft paper is more environment-friendly. The two sides of the kraft paper can have the waterproof effect, and water is prevented from entering the kraft paper to affect the structural strength of the kraft paper.

Description

Technical Field

[0001] The utility model relates to the technical field of kraft paper, and more specifically, to waterproof kraft paper. Background Art

[0002] Kraft paper is a packaging material with high strength and usually yellow-brown in color. It is made from kraft softwood pulp, which is pulped and made on a Fourdrinier papermaking machine. Kraft paper is often made into cement bags, envelopes, wrapping paper, cable protection and other items.

[0003] The waterproof performance of kraft paper is poor. During use or transportation, it is easy to encounter rain, which will cause water to enter the kraft paper, affecting its structural strength and causing the kraft paper to easily break.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a waterproof kraft paper, which has the advantage of improving the waterproof effect of the kraft paper.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: a waterproof kraft paper, including a base layer, wherein symmetrical anti-tear layers are arranged on the upper and lower sides of the base layer, a flame retardant layer is arranged on the side of the anti-tear layer away from the base layer, a plurality of mutually staggered supporting sheets are arranged between the base layer and the anti-tear layer, and a waterproof layer is connected to the side of the flame retardant layer away from the anti-tear layer.

[0007] The utility model is further configured as follows: a connecting piece is fixedly connected to the connecting portion of the two supporting pieces, and the supporting piece and the connecting piece are both made of hard paperboard.

[0008] The utility model is further configured as follows: the anti-tearing layer comprises a plurality of warps and a plurality of wefts, the plurality of warps and wefts are woven together, and the plurality of warps and wefts are adhered to each other.

[0009] The utility model is further configured as follows: the warp and weft are both made of polypropylene, and the warp and weft are both provided with double layers.

[0010] The utility model is further configured as follows: grooves are formed between the plurality of support sheets, and glue is coated in the grooves.

[0011] The utility model is further configured as follows: the flame retardant layer is made of polyvinyl chloride.

[0012] The utility model is further configured as follows: the waterproof layer is in the form of a film, and the waterproof layer is made of TPU.

[0013] In summary, the utility model has the following beneficial effects:

[0014] By providing an anti-tear layer and a number of supporting sheets, the tear resistance of kraft paper is enhanced, it is not easy to deform, and it is prevented from breaking during use. By providing a flame retardant layer, the fireproof effect of kraft paper is improved, thereby making the application range of kraft paper wider. Waterproof layers are provided on both sides of the kraft paper, so that both sides of the kraft paper can have a waterproof effect, preventing moisture from entering the interior of the kraft paper and affecting its structural strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 It is a schematic structural diagram of the tear-resistant layer in the utility model.

[0018] In the figure: 1. base layer; 2. tear-resistant layer; 3. flame-retardant layer; 4. supporting sheet; 5. warp; 6. weft; 7. groove; 8. waterproof layer; 9. connecting sheet. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] A waterproof kraft paper, such as Figure 1-Figure 3 As shown, it includes a base layer 1, and mutually symmetrical anti-tear layers 2 are arranged on the upper and lower sides of the base layer 1. A flame retardant layer 3 is arranged on the side of the anti-tear layer 2 away from the base layer 1, and a plurality of mutually staggered support sheets 4 are arranged between the base layer 1 and the anti-tear layer 2. The side of the flame retardant layer 3 away from the anti-tear layer 2 is connected with a waterproof layer 8. By arranging the anti-tear layer 2 and the plurality of support sheets 4, the tear resistance of the kraft paper is enhanced, and it is not easy to deform, which prevents it from breaking during use. By arranging the flame retardant layer 3, the fireproof effect of the kraft paper is improved, thereby making the application range of the kraft paper wider. Waterproof layers 8 are arranged on both sides of the kraft paper, so that both sides of the kraft paper can have a waterproof effect, preventing moisture from entering the inside of the kraft paper and affecting its structural strength.

[0023] A connecting piece 9 is fixedly connected at the connection of the two support pieces 4. Both the support piece 4 and the connecting piece 9 are made of hard cardboard. The position of the support piece 4 can be limited by the connecting piece 9 to prevent the support piece 4 from deforming. The hard cardboard has a strong deformation resistance. Further, the kraft paper itself is not easy to deform, thereby improving the shape retention of the kraft paper.

[0024] The anti-tear layer 2 includes a plurality of warp threads 5 and a plurality of weft threads 6, which are woven together. By weaving the warp threads 5 and the weft threads 6 together, the anti-tear layer 2 is not easily deformed, thereby improving the tear resistance of the kraft paper. The plurality of warp threads 5 and the weft threads 6 are adhered to each other, so that the connection between the warp threads 5 and the weft threads 6 is tighter to prevent them from loosening during use, thereby improving the deformation resistance of the anti-tear layer 2. The warp threads 5 and the weft threads 6 are both made of polypropylene, and the warp threads 5 and the weft threads 6 are both provided with a double layer. The polypropylene has a strong tensile strength, so that the obtained warp threads 5 and the weft threads 6 are not easily deformed and have a high structural strength.

[0025] Grooves 7 are formed between the support sheets 4, and the grooves 7 are coated with glue. More glue can be filled in the grooves 7 to make the connection between the support sheets 4 and the tear-resistant layer and the flame-retardant layer 3 tighter, thereby preventing the kraft paper from being delaminated.

[0026] The flame retardant layer 3 is made of polyvinyl chloride, which has a good fireproof effect, improves the overall flame retardant effect of kraft paper, and makes the application range of kraft paper wider.

[0027] The waterproof layer 8 is in the form of a film and is made of TPU. TPU has good waterproof properties and strong elongation, and is not prone to rupture. It can be formed into a film, so that the waterproof layer 8 is not prone to rupture and affect the use of kraft paper.

[0028] The principle of the utility model is as follows:

[0029] When using the waterproof kraft paper, the outermost waterproof layer 8 is a film made of TPU, which can protect the inside of the kraft paper from water ingress and prevent the kraft paper from being broken by water. By providing an anti-tear layer 2 and a plurality of support sheets 4, the tear resistance of the kraft paper is enhanced, and it is not easy to deform, thereby preventing it from breaking during use. By providing a flame retardant layer 3, the fireproof effect of the kraft paper is improved, thereby making the application range of the kraft paper wider.

[0030] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A waterproof kraft paper, comprising a base layer (1), characterized in that: The base layer (1) is provided with symmetrical tear-resistant layers (2) on the upper and lower sides; a flame-retardant layer (3) is provided on the side of the tear-resistant layer (2) away from the base layer (1); a plurality of mutually staggered support sheets (4) are provided between the base layer (1) and the tear-resistant layer (2); and a waterproof layer (8) is connected to the side of the flame-retardant layer (3) away from the tear-resistant layer (2).

2. The waterproof kraft paper according to claim 1, characterized in that: A connecting piece (9) is fixedly connected to the connection point of the two supporting pieces (4), and both the supporting pieces (4) and the connecting piece (9) are made of hard cardboard.

3. The waterproof kraft paper according to claim 1, characterized in that: The tear-resistant layer (2) comprises a plurality of warp threads (5) and a plurality of weft threads (6), wherein the plurality of warp threads (5) and the weft threads (6) are woven together, and the plurality of warp threads (5) and the weft threads (6) are adhered to each other.

4. The waterproof kraft paper according to claim 3, characterized in that: The warp threads (5) and the weft threads (6) are both made of polypropylene, and the warp threads (5) and the weft threads (6) are both provided with double layers.

5. The waterproof kraft paper according to claim 1, characterized in that: A groove (7) is formed between the plurality of support sheets (4), and glue is coated in the groove (7).

6. The waterproof kraft paper according to claim 1, characterized in that: The flame retardant layer (3) is made of polyvinyl chloride.

7. The waterproof kraft paper according to claim 1, characterized in that: The waterproof layer (8) is in the form of a thin film and is made of TPU.

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