Waterproof wear-resistant high-strength kraft paper

Abstract

The utility model discloses waterproof wear-resistant high-strength kraft paper which comprises a kraft paper base material, and a first waterproof adhesive layer, a first wear-resistant layer, a first flame-retardant layer and a first protective layer which are sequentially connected from inside to outside are respectively arranged on a first surface of the kraft paper base material; and a second waterproof adhesive layer, a second wear-resistant layer, a second flame-retardant layer and a second protective layer which are sequentially connected from inside to outside are respectively arranged on the second surface of the kraft paper base material. The waterproof, wear-resistant and flame-retardant composite material is simple in structure and reasonable in design, and has better waterproof, wear-resistant and flame-retardant effects, and the kraft paper base material is the kraft paper soaked with thermosetting phenolic resin, so that the structural strength of a product is greatly improved, and the tensile capacity is improved; in addition, the fiber net-shaped structures formed by longitudinally and transversely interweaving the polytetrafluoroethylene fibers and the carbon nanofibers are embedded in the two waterproof adhesive layers, so that the mechanical performance of the product can be enhanced, the tensile capacity can be improved, the water molecule permeation path can be prolonged, and the waterproof performance is further enhanced.

Description

Technical Field

[0001] This utility model relates to the field of kraft paper technology, and more specifically, to a waterproof, wear-resistant, and high-strength kraft paper. Background Technology

[0002] Kraft paper is commonly used to make packaging bags, envelopes, sandpaper, and other products, serving a protective function. Kraft paper itself is very strong and is typically yellowish-brown. As the application range of kraft paper continues to expand, users' performance requirements are also increasing. However, most existing kraft papers, such as the composite kraft paper with patent authorization announcement number CN203834290U, while possessing flame-retardant and anti-static properties, have poor water resistance. Rainwater easily adheres to the kraft paper, causing corrosion. Furthermore, kraft paper has poor tensile strength, making it easily torn, and its abrasion resistance needs improvement, thus reducing its overall practicality. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a waterproof, wear-resistant, high-strength kraft paper with high structural strength, strong tensile strength, and excellent waterproof, wear-resistant, and flame-retardant effects.

[0004] To achieve the above objectives, this utility model provides a waterproof, wear-resistant, and high-strength kraft paper, comprising a kraft paper substrate. The kraft paper substrate is configured as kraft paper impregnated with thermosetting phenolic resin. On the first surface of the kraft paper substrate, a first waterproof adhesive layer, a first wear-resistant layer, a first flame-retardant layer, and a first protective layer are respectively provided in sequence from the inside out. On the second surface of the kraft paper substrate, a second waterproof adhesive layer, a second wear-resistant layer, a second flame-retardant layer, and a second protective layer are respectively provided in sequence from the inside out. The first waterproof adhesive layer and the second waterproof adhesive layer are both embedded with a fiber mesh structure, which is composed of polytetrafluoroethylene fibers and carbon nanofibers interwoven longitudinally and transversely.

[0005] Preferably, the first waterproof adhesive layer and the second waterproof adhesive layer can be respectively configured as polyimide resin.

[0006] Preferably, the first wear-resistant layer and the second wear-resistant layer can be respectively configured as nano-sized polytetrafluoroethylene particles.

[0007] Preferably, the first flame-retardant layer and the second flame-retardant layer can be respectively configured as inorganic flame retardants.

[0008] Preferably, the first protective layer and the second protective layer can be respectively configured as epoxy acrylic resin.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] This utility model has a simple structure and reasonable design. Its two surfaces of the kraft paper substrate are respectively a waterproof adhesive layer, a wear-resistant layer, a flame-retardant layer and a protective layer, which have good waterproof, wear-resistant and flame-retardant effects. In addition, the kraft paper substrate is made of kraft paper impregnated with thermosetting phenolic resin, which greatly increases the structural strength of the product and improves its tensile strength. Furthermore, the interior of both waterproof adhesive layers is embedded with a fiber network structure made of polytetrafluoroethylene fibers and carbon nanofibers, which can not only enhance the mechanical properties of the product and improve its tensile strength, but also extend the water molecule penetration path and further enhance the waterproof performance. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the layer structure of the waterproof, wear-resistant, and high-strength kraft paper provided in this embodiment of the utility model;

[0013] Figure 2 This is a partially enlarged view of the fiber mesh structure provided in an embodiment of this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] Please refer to Figure 1 The present invention provides a waterproof, wear-resistant, and high-strength kraft paper, comprising a kraft paper substrate 1. On the first surface of the kraft paper substrate 1, there are a first waterproof adhesive layer 2, a first wear-resistant layer 3, a first flame-retardant layer 4, and a first protective layer 5 connected sequentially from the inside out. On the second surface of the kraft paper substrate 1, there are a second waterproof adhesive layer 6, a second wear-resistant layer 7, a second flame-retardant layer 8, and a second protective layer 9 connected sequentially from the inside out.

[0016] The components of this embodiment will now be described in detail with reference to the accompanying drawings.

[0017] In this embodiment, the kraft paper substrate 1 can preferably be configured as kraft paper impregnated with thermosetting phenolic resin, which greatly increases the structural strength of the product and improves its tensile strength.

[0018] In this embodiment, the first waterproof adhesive layer 2 and the second waterproof adhesive layer 6 are preferably made of polyimide resin. Polyimide resin has excellent waterproof performance and maintains good adhesion even under high temperature conditions.

[0019] In this embodiment, the first wear-resistant layer 3 and the second wear-resistant layer 7 can preferably be configured as nano-sized polytetrafluoroethylene particles, which have excellent wear resistance and a low coefficient of friction.

[0020] In this embodiment, the first flame-retardant layer 4 and the second flame-retardant layer 8 can be preferably set as inorganic flame retardants (such as inorganic hypophosphite flame retardants), which can enable kraft paper to have good flame-retardant effect and be low-carbon and environmentally friendly.

[0021] In this embodiment, the first protective layer 5 and the second protective layer 9 can preferably be made of transparent epoxy acrylic resin. Epoxy acrylic resin enables the surface of kraft paper to have properties such as abrasion resistance, scratch resistance, stain resistance, weather resistance, and sun resistance.

[0022] like Figure 2 As shown, both the first waterproof adhesive layer 2 and the second waterproof adhesive layer 6 have embedded fiber mesh structures inside. The fiber mesh structure can be made of polytetrafluoroethylene fibers 10 and carbon nanofibers 11 interwoven in a longitudinal and transverse manner. This can not only enhance the mechanical properties of kraft paper and improve its tensile strength, but also extend the water molecule penetration path and further enhance its waterproof performance.

[0023] In summary, this utility model has a simple structure, reasonable design, and excellent waterproof, wear-resistant, and flame-retardant effects. It also has high structural strength, strong tensile strength, and is not easily torn.

[0024] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A waterproof, wear-resistant, high-strength kraft paper, comprising a kraft paper substrate, characterized in that: The kraft paper substrate is kraft paper impregnated with thermosetting phenolic resin. The first surface of the kraft paper substrate is provided with a first waterproof adhesive layer, a first wear-resistant layer, a first flame-retardant layer and a first protective layer connected in sequence from the inside out. The second surface of the kraft paper substrate is provided with a second waterproof adhesive layer, a second wear-resistant layer, a second flame-retardant layer and a second protective layer connected in sequence from the inside out. The first waterproof adhesive layer and the second waterproof adhesive layer are both embedded with a fiber mesh structure, which is composed of polytetrafluoroethylene fibers and carbon nanofibers interwoven in a longitudinal and transverse manner.

2. The waterproof, wear-resistant, high-strength kraft paper according to claim 1, characterized in that: The first and second waterproof adhesive layers are made of polyimide resin.

3. The waterproof, wear-resistant, high-strength kraft paper according to claim 1, characterized in that: The first and second wear-resistant layers are made of nano-sized polytetrafluoroethylene particles.

4. The waterproof, wear-resistant, high-strength kraft paper according to claim 1, characterized in that: The first flame-retardant layer and the second flame-retardant layer are made of inorganic flame retardants.

5. The waterproof, wear-resistant, high-strength kraft paper according to claim 1, characterized in that: The first and second protective layers are made of epoxy acrylic resin.

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