Tear-resistant wall net applied to green building and preparation method thereof

Abstract

The invention discloses a tear-resistant wall net applied to green buildings and a preparation method thereof.The tear-resistant wall net comprises a blank net, the blank net is formed by weaving warp yarn and weft yarn, the warp yarn comprises first warp yarn and second warp yarn, and the first warp yarn and the weft yarn are interwoven and bundled together through the second warp yarn; the first warp yarns are tear-resistant cords formed by secondarily twisting a plurality of strands of primarily twisted cords, and the primarily twisted cords comprise central fibers and outer-layer fibers wrapping the peripheries of the central fibers; and secondary water bath dipping treatment is adopted. According to the first twist cords, ultra-high molecular weight polyethylene fibers or polyarylate fibers are located in the center to serve as center fibers, and outer layer fibers which play a role in improving tensile strength and enhancing interface adhesion are arranged on the peripheries of the center fibers in a spiral winding mode through twisting; the outer layer fiber is bonded with the latex paint material, and force is transmitted to the central fiber through physical action, so that the problems of poor interface bonding of materials such as ultra-high molecular weight polyethylene and the like and surface bonding caused by treatment of an oil agent on the surface of the fiber material are solved.

Description

Technical Field

[0001] The present invention relates to the field of green buildings, and particularly to a tear-resistant wall net applied to green buildings and a preparation method thereof. Background Art

[0002] Green buildings cover all aspects of buildings, from planning and design, construction to operation and maintenance. Adhering to the concept of sustainable development, they are of great significance for promoting ecological environment protection, addressing climate change, and improving people's living quality. They are an inevitable trend in the future development of the construction industry. With the continuous promotion of the concept of green buildings, the requirements for the environmental protection, durability, and functionality of building materials are increasing day by day. In the construction of building walls, as an important material for enhancing the structural stability of walls and preventing wall cracking, the performance of the wall net directly affects the quality and service life of the walls.

[0003] When facing a complex stress environment, traditional wall nets are prone to tearing, resulting in a decline in the wall protection effect and an increase in maintenance costs. At the same time, some traditional wall net materials have high energy consumption and large pollution during the production process, which do not meet the environmental protection requirements of green buildings. Therefore, it is of great practical significance to develop a wall net that not only has excellent tear resistance but also meets the environmental protection standards of green buildings. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a tear-resistant wall net applied to green buildings and a preparation method thereof, effectively solving problems such as interfacial adhesion and internal wear existing in the use of some fiber materials; the canvas (original blank net) is woven from a first warp yarn, a second warp yarn, and a weft yarn. The first warp yarn is a tear-resistant cord made of a mixture of multiple fibers, and the tear-resistant cord is made by twisting multiple first-twisted cords; the first-twisted cord has a ultra-high molecular weight polyethylene fiber or a polyarylate fiber at the center as the central fiber, and an outer layer fiber that is wrapped in a spiral winding manner by twisting is arranged around the central fiber to improve the tensile strength and enhance the interfacial adhesion; through the design of covering the central fiber with the outer layer fiber, the outer layer fiber is adhered to the latex paint material, and the force is transmitted to the central fiber through physical action, effectively solving the industry bottleneck problems such as poor interfacial adhesion of materials such as ultra-high molecular weight polyethylene that have not been solved, and the surface adhesion problems brought about by surface treatment oil agents for some fiber materials considering surface smoothness and wear resistance.

[0005] The technical solution adopted by the present invention is as follows: A tear-resistant wall net applied to green buildings, comprising a raw blank net and a first treatment layer and a second treatment layer provided on the raw blank net. The raw blank net is woven from warp yarns and weft yarns. The warp yarns include first warp yarns and second warp yarns. The first warp yarns are intertwined with the weft yarns and bundled together by the second warp yarns. The first warp yarns are tear-resistant yarns made by twisting multiple strands of initially twisted yarn ropes. The initially twisted yarn ropes include central fibers and outer fibers wrapped around the periphery of the central fibers.

[0006] On the basis of the above solution, preferably, the second warp yarn is selected from one or more of para-aramid and para-aramid, and the fineness is 2000-4100 dtex; the second warp yarn is a twisted yarn formed by twisting 3-5 strands of second warp yarns.

[0007] On the basis of the above solution, preferably, the weft yarn is selected from one or more of para-aramid and para-aramid, and the fineness is 2000-4100 dtex; the weft yarn is a twisted yarn formed by twisting 3-12 strands of weft yarns.

[0008] On the basis of the above solution, preferably, the central fiber is selected from one of ultra-high molecular weight polyethylene fiber and polyarylate fiber, and the molecular weight of the ultra-high molecular weight polyethylene fiber > 1 million.

[0009] On the basis of the above solution, preferably, the outer fiber is selected from one or more of polyarylate fiber and polyaramide fiber.

[0010] On the basis of the above solution, preferably, the outer fiber is arranged to be wrapped around the periphery of the central fiber in a spiral winding manner by twisting.

[0011] On the basis of the above solution, preferably, the breaking elongation rate of the tear-resistant yarn rope is 2%-6%, and the fineness is 500 dtex-6000 dtex.

[0012] A preparation method of a tear-resistant wall net applied to green buildings, step S1: Weave the first warp yarns, second warp yarns and weft yarns to form a raw blank net; Step S2: Immerse the raw blank net obtained in step S1 in a first bath impregnating solution for impregnation treatment, and dry it at 100-120 °C for 20-50 min to obtain a semi-finished product; Step S3: Immerse the semi-finished product obtained in step S2 in a second bath sizing solution for impregnation treatment, and dry it at 110-140 °C for 30-100 min to obtain a high-strength and lightweight tear-resistant wall net.

[0013] On the basis of the above scheme, as a preference, the first bath immersion liquid includes, by mass percentage, 1% to 5% water-soluble epoxy resin, 0 to 2% blocked isocyanate, 0 to 2% water-based curing agent, and the rest is deionized water, the above total being 100%; the second bath immersion liquid includes latex and water-based adhesive, and the solid ratio of latex to water-based adhesive is 85:15 to 60:40; the latex is selected from one or more of butyl latex, natural latex, styrene butadiene latex, carboxylated styrene butadiene, and carboxylated nitrile latex; the water-based adhesive is a phenolic resin aqueous solution or a mixed aqueous solution of a water-soluble epoxy resin and a curing agent, and the curing agent is a blocked isocyanate or a water-based imidazole curing agent.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) When the wall mesh is subjected to external forces, the central fiber can bear the main load with its excellent mechanical properties. The outer fiber transfers the force evenly to the central fiber through close combination with the central fiber and effective adhesion with the latex paint material, thus avoiding the problem of stress concentration. This unique structural design not only effectively solves the industry bottleneck problem of poor interface adhesion of materials such as ultra-high molecular weight polyethylene, but also improves the problem of internal wear of fiber materials, greatly improving the performance and service life of the wall mesh.

[0015] (2) The first warp yarn is the "key beam" in the entire structure. It is a tear-resistant cord made by twisting multiple strands of primary twisted ropes. This unique twisting process is like combining multiple small steel beams into a giant steel beam, which greatly enhances the strength and stability of the rope. The central fiber and outer fiber in the primary twisted rope are just like the core material and outer protective material in the steel beam, providing strong mechanical support for the wall net. The outer fiber is selected from one or more of polyarylate fiber and polyarylamide fiber. They are twisted and tightly wrapped around the outer periphery of the central fiber in a spiral winding manner, just like putting on a layer of solid protective armor for the steel beam, which not only improves the tensile strength but also enhances the interface bonding effect.

[0016] (3) The high-strength, lightweight, tear-resistant wall net of the present invention is unique in structural design and is firmly supported by three "foundations": the original net, the first treated layer and the second treated layer. The original net, as the basic structure of the wall net, provides a solid physical support for the entire wall net. It is tightly woven with warp yarns and weft yarns, which are interwoven and synergistic, and jointly withstand the test of various external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the central fiber and the outer fiber of the present invention; Figure 2 It is a structural schematic diagram of the primary twisted wire rope of the present invention; Figure 3 Schematic diagram of the main warp yarn of the present invention; Figure 4 Three-dimensional view of the framework layer of the present invention; Figure 5 Schematic diagram of the structure of the framework layer of the present invention; Figure 6 Schematic diagram of the overall structure of the tear-resistant wall cloth of the present invention. Detailed implementation manners

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific implementation manners of the present invention with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can also be obtained.

[0019] A tear-resistant wall net, by using outer layer fibers that are wrapped around the periphery of the central fiber in a spiral winding manner through twisting to improve the tensile strength and enhance the interfacial adhesion, a canvas with a complex fabric structure is woven; the three-dimensional schematic diagram of this complex fabric structure is as shown in the appendix Figure 1 shown, and the fabric structure diagram is as shown in the appendix Figure 2 shown. The high-strength lightweight tear-resistant wall net adopts a design with a straight weft diameter, effectively exerting the mechanical strength of the first warp yarn, and effectively solving the problem of a significant decrease in the overall strength caused by the asynchronous stress due to the slight difference in the crimp of different yarns in other structures.

[0020] As Figures 1 - 6 , a lightweight tear-resistant wall net, the tear-resistant wall net includes a first treatment layer 8, a second treatment layer 9, and a raw blank net 11 disposed between the first treatment layer 8 and the second treatment layer 9. Adhesive layers 10 are provided on both the upper surface and the lower surface of the raw blank net 11. The first treatment layer 8 and the second treatment layer 9 are both connected to the raw blank net 11 through the adhesive layers 10. The raw blank net 11 is woven from a first warp yarn 5, a second warp yarn 6, and a weft yarn 7. The first warp yarn 5 is a tear-resistant cord 4 made by re-twisting multiple strands of initially twisted cord 3. The initially twisted cord 3 includes a central fiber 1 and outer layer fibers 2 wrapped around the periphery of the central fiber. The outer layer fibers 2 play a role in improving the tensile strength and enhancing the interfacial adhesion.

[0021] The second warp yarn 6 is selected from one of para-aramid and para-aramid, with a fineness of 550 - 4000 dtex; the second warp yarn is a twisted yarn formed by twisting 1 - 5 strands of the second warp yarn; the weft yarn 7 is selected from one of para-aramid and para-aramid, with a fineness of 550 - 4000 dtex; the weft yarn is a twisted yarn formed by twisting 1 - 12 strands of the weft yarn.

[0022] The central fiber 1 is a ultra-high molecular weight polyethylene fiber or a polyarylate fiber; the molecular weight of the ultra-high molecular weight polyethylene fiber is higher than 1 million.

[0023] The breaking elongation of the tear-resistant cord 4 is 2% - 6%, and the fineness is 500 dtex - 6000 dtex; the outer layer fiber 2 is selected from one of polyarylate fibers and polyaramide fibers; the outer layer fiber 2 is arranged to be wrapped around the periphery of the central fiber 1 in a spiral winding manner by twisting.

[0024] The thickness of the first treatment layer 8 is 3 - 40 mm, the thickness of the second treatment layer 9 is 2 - 30 mm, and the thickness of the adhesive layer 10 is 1 - 3 mm.

[0025] Among them, the first treatment layer is a rubber material, the second treatment layer is a rubber material, the adhesive layer is a polyurethane resin adhesive, and the polyurethane resin adhesive can be tightly combined through the original embryo net 11. Example 1

[0026] Such as Figures 1 to 6 , a high-strength and lightweight tear-resistant wall net, the tear-resistant wall net includes an original blank net, a first treatment layer is sequentially arranged on the original blank net from bottom to top, and a second treatment layer is arranged on the first treatment layer. The original blank net is woven by warp yarns and weft yarns 5. The warp yarns include first warp yarns 6 and second warp yarns 7. The first warp yarns 6 are intertwined with the weft yarns 5 and tied together by the second warp yarns 7. The first warp yarns are made of multiple strands of initially twisted cords to form tear-resistant cords. The initially twisted cords include central fibers and outer layer fibers. The outer layer fibers are wrapped around the periphery of the central fibers. The outer layer fibers play a role in improving the tensile strength and enhancing the interfacial adhesion; the outer layer fibers are wrapped around the periphery of the central fibers in a parallel and side-by-side manner.

[0027] The central fiber is 50% polyarylate fiber, the outer layer fiber is 50% polyaramide fiber, the breaking elongation of the tear-resistant cord is between 2% and 6%, the fineness is between 3000 dtex and 4000 dtex, the yarn of the second warp yarn is polyester fiber, the fineness is 2000 - 3000 dtex, the second warp yarn is a twisted yarn formed by twisting 3 strands of the second warp yarn; the weft yarn is nylon 66, and the weft yarn is a twisted yarn formed by twisting 6 strands of the weft yarn.

[0028] The preparation method of the high-strength and lightweight tear-resistant wall net of this embodiment includes the following steps: Step S1. Weave the first warp yarns 6, the second warp yarns 7 and the weft yarns 5 to form an original blank net; Step S2. Immerse the original blank net into the first bath impregnating solution. By mass percentage, the first bath impregnating solution includes 2% water-soluble epoxy resin, 2% blocked isocyanate, and the rest is deionized water, with the above total being 100%. Dry it at 115°C for 45 min to obtain a semi-finished product; the water-soluble epoxy resin is glycerol triglycidyl ether, and the manufacturer of the blocked isocyanate is Covestro Polymer China Co., Ltd., with the grade being 2794; Step S3. Immerse the semi-finished product into the second bath sizing solution, and dry it at 140°C for 90 min to obtain a high-strength, lightweight, tear-resistant wall net.

[0029] The second bath sizing solution includes latex and a water-based adhesive. The mixing ratio of latex to the water-based adhesive is 85:15 to 60:40; preferably 70:30. The solid content of the aqueous solution after mixing latex and the water-based adhesive is 20%. The latex is butadiene-acrylonitrile latex; the water-based adhesive is a mixed aqueous solution of 2-ethyl-4-methylimidazole and epoxy resin. The water-based adhesive includes water-soluble epoxy resin and 2-ethyl-4-methylimidazole. The mass ratio of the water-soluble epoxy resin to 2-ethyl-4-methylimidazole is 5:1, and the water-soluble epoxy resin is glycerol triglycidyl ether.

[0030] The designed strength of Example 1 is 3150 N / mm, the actual strength is 3280 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 20.3. Example 2

[0031] The difference between Example 2 and Example 1 is that the central fiber is 80% ultra-high molecular weight polyethylene, the outer fiber is 20% polyimide fiber, the yarn of the second warp is nylon 66, and the weft yarn is nylon 6.

[0032] In Step S2, the first bath impregnating solution includes 1% water-soluble epoxy resin and 2% blocked isocyanate. The temperature of the impregnation treatment is 110°C, and the reaction time is 40 min; in Step S3, the latex is butadiene-acrylonitrile latex; the temperature of the impregnation treatment is 140°C, and the reaction time is 90 min.

[0033] The designed strength of Example 2 is 2000 N / mm, the actual strength is 2180 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 17.8. Example 3

[0034] The difference between Example 3 and Example 1 is that the central fiber is 10% polyarylate, the outer fiber is 90% polyvinyl acetal fiber, the yarn of the second warp is polyester fiber, and the weft yarn is nylon 66.

[0035] In step S2, the first bath dipping solution contains 5% water-soluble epoxy resin, the temperature of the dipping treatment is 120 °C, and the reaction time is 40 min; in step S3, the latex is butadiene-pyridine latex; the temperature of the dipping treatment is 140 °C, and the reaction time is 90 min.

[0036] The designed strength of Example 3 is 1000 N / mm, the actual strength is 1120 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 18.8. Example 4

[0037] The difference between Example 4 and Example 1 is that the central fiber is 35% ultra-high molecular weight polyethylene, the outer fiber is 65% polyaramid fiber, the yarn of the second warp is polyester fiber, and the weft yarn is nylon 66.

[0038] In step S2, the first bath dipping solution contains 2% water-soluble epoxy resin and 2% blocked isocyanate, the temperature of the dipping treatment is 120 °C, and the reaction time is 30 min; in step S3, the latex is butadiene-pyridine latex; the temperature of the dipping treatment is 130 °C, and the reaction time is 80 min.

[0039] The designed strength of Example 4 is 2500 N / mm, the actual strength is 2840 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 18.2. Example 5

[0040] The difference between Example 5 and Example 1 is that the central fiber is 50% ultra-high molecular weight polyethylene, the outer fiber is 50% polyvinyl acetal fiber, the yarn of the second warp is polyvinyl acetal fiber, and the weft yarn is polyester fiber.

[0041] In step S2, the first bath dipping solution contains 2% water-soluble epoxy resin and 3% blocked isocyanate, the temperature of the dipping treatment is 120 °C, and the reaction time is 30 min; in step S3, the latex is butadiene-pyridine latex / butadiene-styrene latex; the temperature of the dipping treatment is 130 °C, and the reaction time is 80 min.

[0042] The designed strength of Example 5 is 1600 N / mm, the actual strength is 1820 N / mm, the adhesion performance is tested according to GB / T 6759, and the adhesion strength is 19.4 N / mm.

[0043] Comparative Example 1 The difference between Comparative Example 1 and Example 4 is that the central fiber is 50% ultra-high molecular weight polyethylene and the outer fiber is 50% ultra-high molecular weight polyethylene.

[0044] The design strength of Comparative Example 1 is 2500 N / mm, the actual strength cannot be tested, and the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 3.2.

[0045] In Comparative Example 1, both the central fiber and the outer fiber are ultra-high molecular weight polyethylene. In Comparative Example 1, due to the absence of a coating structure, the strength cannot be tested, and the adhesion performance is very poor.

[0046] Comparative Example 2 The differences between Comparative Example 2 and Example 5 are as follows: in step S2, the temperature of the impregnation treatment is 90 °C and the reaction time is 30 min; in step S3, the temperature of the impregnation treatment is 100 °C and the reaction time is 80 min.

[0047] The design strength of Comparative Example 2 is 1600 N / mm, the actual strength is 1760 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 5.4.

[0048] Comparative Example 3 The differences between Comparative Example 3 and Example 5 are as follows: in step S2, the temperature of the impregnation treatment is 180 °C and the reaction time is 30 min; in step S3, the temperature of the impregnation treatment is 140 °C and the reaction time is 30 min.

[0049] The design strength of Comparative Example 3 is 1600 N / mm, the actual strength is 720 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 19.8.

[0050] Comparative Example 4 The differences between Comparative Example 4 and Example 5 are as follows: the temperature of the impregnation treatment is 120 °C and the reaction time is 10 min; in step S3, the temperature of the impregnation treatment is 130 °C and the reaction time is 20 min.

[0051] The design strength of Comparative Example 4 is 1600 N / mm, the actual strength is 1690 N / mm, the adhesion performance is tested according to GB / T 6759 N / mm, and the adhesion strength is 5.6.

[0052] From the test results of the strength and adhesion strength of Example 5 and Comparative Examples 2-4, it can be concluded that if the impregnation temperature is too low and the time is too short, the adhesion force will be relatively low; if the temperature is too high, the strength loss will be large.

[0053] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A tear-resistant wall net applied to green buildings, characterized in that, It includes a raw fabric net, a first treatment layer and a second treatment layer provided on the raw fabric net. The raw fabric net is woven from warp yarns and weft yarns. The warp yarns include first warp yarns and second warp yarns. The first warp yarns are intertwined with the weft yarns and bundled together by the second warp yarns. The first warp yarns are tear-resistant yarns made by doubling and twisting multiple single-twist yarn ropes. The single-twist yarn ropes include central fibers and outer fibers wrapped around the periphery of the central fibers.

2. The anti-tear wall net applied to green buildings as described in claim 1, wherein, The second warp yarns are selected from one or more of para-aramid and para-aramid, with a fineness of 2000-4100 dtex; the second warp yarns are twisted yarns made by doubling and twisting 3-5 strands of second warp yarns.

3. The anti-tearing wall net applied to green buildings as described in claim 1 is characterized in that, The weft yarns are selected from one or more of para-aramid and para-aramid, with a fineness of 2000-4100 dtex; the weft yarns are twisted yarns made by doubling and twisting 3-12 strands of weft yarns.

4. The anti-tearing wall net applied to a green building according to claim 1, wherein The central fibers are selected from one of ultra-high molecular weight polyethylene fibers and polyarylate fibers, and the molecular weight of the ultra-high molecular weight polyethylene fibers > 1 million.

5. The anti-tearing wall net applied to green buildings according to claim 1, characterized in that, The outer fibers are selected from one or more of polyarylate fibers and polyaramide fibers.

6. The anti-tearing wall net applied to green buildings according to claim 1, characterized in that The outer fibers are arranged to wrap around the periphery of the central fibers in a spiral winding manner by twisting.

7. The anti-tearing wall net applied to a green building according to claim 1, characterized in that, The breaking elongation of the tear-resistant yarn ropes is 2%-6%, and the fineness is 500 dtex-6000 dtex.

8. A preparation method of a tear-resistant wall net applied to green buildings, characterized in that Step S1: Weave the first warp yarns, second warp yarns and weft yarns to form a raw fabric net; Step S2: Immerse the raw fabric net obtained in Step S1 in a first bath impregnating solution for impregnation treatment, and dry it at 100-120 °C for 20-50 min to obtain a semi-finished product; Step S3: Immerse the semi-finished product obtained in Step S2 in a second bath sizing solution for impregnation treatment, and dry it at 110-140 °C for 30-100 min to obtain a high-strength and lightweight tear-resistant wall net.

9. The anti-tearing wall net applied to a green building according to claim 1, wherein, By mass percentage, the first bath impregnating solution includes 1%-5% water-soluble epoxy resin, 0%-2% blocked isocyanate, 0%-2% water-based curing agent, and the rest is deionized water, and the above total is 100%; the second bath sizing solution includes latex and a water-based binder, and the mixing ratio of latex and the water-based binder is 85:15-60:40; the latex is selected from one or more of butadiene-acrylonitrile latex, natural latex, styrene-butadiene latex, carboxylated styrene-butadiene, and carboxylated nitrile-butadiene latex; the water-based binder is an aqueous solution of phenolic resin or a mixed aqueous solution of water-soluble epoxy resin and a curing agent, and the curing agent is a blocked isocyanate or a water-based imidazole curing agent.

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