Anti-cracking alkali-resistant continuous felt net and preparation method thereof

Abstract

The invention relates to the technical field of alkali-resistant continuous felt net preparation, in particular to an anti-cracking alkali-resistant continuous felt net and a preparation method thereof, and the method comprises the following steps: S1, wire drawing; s2, shred throwing; s3, sizing: spraying alkali-resistant glue from top to bottom when the precursor fiber felt passes through a sizing device, and sucking redundant adhesive at a corresponding position below a conveying belt under negative pressure; and S4, drying and shaping. The anti-cracking performance, the alkali-resisting performance and the corrosion-resisting performance of the alkali-resisting continuous felt can meet the application requirement of the alkali-resisting continuous felt in an outer net external thermal insulation system, and the alkali-resisting continuous felt can completely replace traditional woven fabric to be applied to the external wall thermal insulation system. The preparation method has the advantages of high automation degree, high production efficiency, excellent material utilization rate, energy conservation, labor liberation, lower comprehensive cost and low-carbon production.

Description

Technical Field

[0001] This invention relates to the field of alkali-resistant continuous felt netting preparation technology, specifically a crack-resistant alkali-resistant continuous felt netting and its preparation method. Background Technology

[0002] In the application of external wall insulation systems, fiberglass mesh is currently used as a reinforcing material worldwide. Its main functions are to improve the mechanical strength of the surface layer, ensure the continuity of the surface layer's resistance, disperse the shrinkage pressure and insulation stress of the surface layer, avoid stress concentration, and resist surface cracking caused by natural temperature and humidity changes and accidental impacts.

[0003] Traditional alkali-resistant fiberglass mesh is woven fabric, and each process in the production process is a separate production workshop. The entire production line is huge and complex, involving huge amounts of factory buildings, equipment, personnel, auxiliary facilities, and auxiliary materials. The energy consumption, material consumption, and labor consumption per unit product account for a large proportion, while the material utilization rate, mechanization level, and efficiency are all limited. At the same time, environmental noise also affects the physical and mental health of operators.

[0004] Therefore, this application specifically designs an alkali-resistant continuous felt net that can replace traditional woven fabrics to achieve high strength, crack resistance, corrosion resistance, low energy consumption, and low cost, as well as a method for its preparation. Summary of the Invention

[0005] The purpose of this invention is to provide a crack-resistant and alkali-resistant continuous felt net and its preparation method. The alkali-resistant continuous felt net can be used in the external wall insulation system to completely replace the traditional woven fabric. It has the advantages of high automation, high production efficiency, excellent material utilization, energy saving, labor reduction, lower overall cost, and low carbon production.

[0006] To solve the above-mentioned technical problems, the present invention provides a method for preparing crack-resistant and alkali-resistant continuous felt netting, the method comprising the following steps:

[0007] S1, Brushed

[0008] The molten glass is melted in a high-temperature tank furnace at 1150℃~1400℃, drawn into continuous fiber filaments by drawing wheels, and then divided into several bundles of filaments by a bundle splitter.

[0009] S2, Wire Polishing

[0010] The raw filament bundle is thrown onto the moving conveyor belt perpendicular to the conveyor belt direction by a filament throwing mechanism to form raw filament felt;

[0011] S3, Applying adhesive

[0012] When the raw filament passes through the adhesive application device, alkali-resistant adhesive is applied from top to bottom, and a negative pressure is applied at the corresponding position below the conveyor belt to suck up the excess adhesive.

[0013] S4. Drying and shaping

[0014] After being coated with alkali-resistant adhesive, the wet continuous felt enters multiple rollers for drying and shaping.

[0015] Furthermore, in S1, the bus density of the fiber bundle is 70–136 tex, and the diameter of a single fiber is 13 μm–25 μm.

[0016] Furthermore, the unit area mass of the raw silk felt in S2 is 120-135 g / m².

[0017] Furthermore, in S3, the negative pressure range is -0.1 to 0 MPa, and the amount of alkali-resistant adhesive applied accounts for 20% to 30% of the total mass of the product.

[0018] Furthermore, the alkali-resistant adhesive in S3 is mainly prepared by mixing styrene-butadiene emulsion, styrene-acrylic emulsion and a polyhydroxy organic crosslinking agent.

[0019] Furthermore, the mass ratio of the styrene-butadiene emulsion, the styrene-acrylic emulsion, and the polyhydroxy organic crosslinking agent is (40-55):(35-54):(6-10).

[0020] In another aspect, the present invention provides a crack-resistant and alkali-resistant continuous felt net, which is prepared by the above-described preparation method.

[0021] The beneficial effects of this invention are:

[0022] 1. The alkali-resistant continuous felt of the present invention can completely replace traditional woven fabrics in external wall insulation systems. Its preparation method has the advantages of high automation, high production efficiency, excellent material utilization, energy saving, labor reduction, lower overall cost, and low-carbon production.

[0023] 2. The alkali-resistant continuous felt of the present invention uses a drum drying method, which allows the fibers to be continuously dried on the surface of multiple drums, enhancing the adhesion between the fibers. The protruding fibers on both sides are pressed onto the surface, reducing the generation of fly filaments and facilitating the subsequent application of building materials.

[0024] 3. The anti-cracking and anti-corrosion properties of the alkali-resistant continuous felt of the present invention can meet the requirements for its application in external wall insulation systems. In particular, the alkali-resistant continuous felt of the present invention has a much higher alkali-resistant tensile strength retention rate than the standard mesh, and the durability of the alkali-resistant continuous felt is better than that of the standard mesh of the same quality. When the prepared alkali-resistant continuous felt is applied to the external wall insulation system, it can greatly reduce production costs and improve production efficiency.

[0025] 4. The alkali-resistant adhesive of the present invention not only serves to bond fibers and prevent them from scattering, but also provides alkali protection against erosion by alkaline substances, enabling the prepared alkali-resistant continuous felt to be used in building exterior wall insulation systems. Its crack resistance and corrosion resistance are far superior to standard mesh fabric of the same quality. Attached Figure Description

[0026] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural diagram of an existing standard mesh fabric;

[0028] Figure 2 This is a schematic diagram of the structure of the continuous felt obtained by the present invention. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In one specific embodiment of the present invention, a method for preparing a crack-resistant and alkali-resistant continuous felt net includes the following steps:

[0031] S1, Brushed

[0032] The molten glass is melted in a high-temperature tank furnace at 1250℃, and then drawn into continuous fiber filaments by a drawing wheel. The fiber filaments are then divided into several bundles by a bundle splitter. The total fiber density of the fiber bundle is 75 tex, and the diameter of a single fiber is 22 μm.

[0033] S2, Wire Polishing

[0034] The raw filament bundles are thrown onto the moving conveyor belt perpendicular to the conveyor belt direction by a filament throwing mechanism to form a raw filament felt with a unit area mass of 135g / ㎡.

[0035] S3, Applying adhesive

[0036] When the raw filament felt passes through the sizing device, alkali-resistant adhesive is applied from top to bottom. At the corresponding position below the conveyor belt, there is negative pressure to suck up the excess adhesive. The negative pressure range is -0.1 MPa, and the coating amount of alkali-resistant adhesive is 27%. The alkali-resistant adhesive is mainly prepared by mixing styrene-butadiene emulsion, styrene-acrylic emulsion and polyhydroxy organic crosslinking agent in a mass ratio of 52:44:6.

[0037] S4. Drying and shaping

[0038] After being coated with alkali-resistant adhesive, the wet continuous felt enters the surface of multiple rollers for drying and shaping. The alkali-resistant continuous felt of the present invention uses a roller drying method, which allows the fibers to be continuously dried on the surface of multiple rollers, enhancing the adhesion between the fibers. The protruding fibers on both sides are pressed onto the surface, reducing the generation of fly filaments and facilitating the subsequent scraping and coating of building materials.

[0039] In another aspect, the present invention provides a crack-resistant and alkali-resistant continuous felt net, which is prepared by the above-described preparation method and can completely replace traditional woven fabrics in external wall insulation systems.

[0040] This embodiment will use continuous felt (such as...) Figure 2 ) and standard mesh fabric (such as Figure 1 Conduct tests for comparison:

[0041] ① A comparison is made in terms of production process, material utilization rate, and labor consumption, as shown below:

[0042]

[0043] In summary, it can be seen that the preparation process of the alkali-resistant continuous felt of the present invention is simple, the material utilization rate is high, and the labor consumption is low.

[0044] ②The results of each performance test are shown in the table below:

[0045]

[0046] Based on the test results in the table above: First, the mass per unit area of ​​the standard net is 164 g / m². 2 Slightly larger in mass than continuous felt, its tensile properties meet the requirements of JC / T 841-2007 "Alkali-resistant Glass Fiber Mesh" and GB / T 29906-2013 "Materials for Molded Polystyrene Board Thin Plaster Exterior Wall Insulation System". However, due to the limitations of its physical form, the tensile breaking strength of continuous felt could not be tested according to the methods specified in the standards, so the test results are not comparable. But from the test results of various performance tests, the original strength and the test results after alkali resistance of the alkali-resistant continuous felt sample are greater than those of the traditional standard mesh sample. Therefore, the tensile properties of continuous felt can also meet its application in external insulation systems.

[0047] Furthermore, regarding the comparison of freeze-thaw resistance and alkali-resistant tensile strength retention rates, which reflect durability performance, no abnormalities were found in the test results of the freeze-thaw resistance samples of both types of samples. This indicates that the durability of both samples can meet the requirements for their application in external insulation systems. Moreover, the alkali-resistant continuous felt's alkali-resistant tensile strength retention rate test results are much greater than those of the standard mesh fabric, indicating that the durability of the continuous felt is superior to that of the standard mesh fabric of the same quality. This conclusion is also reflected in the comparison of the bending load test results after alkali resistance. In summary, the performance of the alkali-resistant continuous felt can meet its application requirements in external mesh insulation systems.

[0048] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for preparing a crack-resistant and alkali-resistant continuous felt net, characterized in that, The method includes the following steps: S1, Brushed The molten glass is melted in a high-temperature tank furnace at 1150℃~1400℃, drawn into continuous fiber filaments by drawing wheels, and then divided into several bundles of filaments by a bundle splitter. S2, Wire Polishing The raw filament bundle is thrown onto the moving conveyor belt perpendicular to the conveyor belt direction by a filament throwing mechanism to form raw filament felt; S3, Applying adhesive When the raw filament passes through the adhesive application device, alkali-resistant adhesive is applied from top to bottom, and a negative pressure is applied at the corresponding position below the conveyor belt to suck up the excess adhesive. S4. Drying and shaping After being coated with alkali-resistant adhesive, the wet continuous felt enters multiple rollers for drying and shaping.

2. The method for preparing a crack-resistant and alkali-resistant continuous felt net according to claim 1, characterized in that, The fiber bundle in S1 has a bus density of 70–136 tex and a single fiber diameter of 13 μm–25 μm.

3. The method for preparing a crack-resistant and alkali-resistant continuous felt net according to claim 1, characterized in that, The unit area mass of the raw silk felt in S2 is 120-135 g / m².

4. The method for preparing a crack-resistant and alkali-resistant continuous felt net according to claim 1, characterized in that, The negative pressure range in S3 is -0.1 to 0 MPa, and the amount of alkali-resistant adhesive coating accounts for 20% to 30% of the total mass of the product.

5. The method for preparing a crack-resistant and alkali-resistant continuous felt net according to claim 1, characterized in that, The alkali-resistant adhesive in S3 is mainly prepared by mixing styrene-butadiene emulsion, styrene-acrylic emulsion and a multi-hydroxyl organic crosslinking agent.

6. The method for preparing a crack-resistant and alkali-resistant continuous felt net according to claim 5, characterized in that, The mass ratio of the styrene-butadiene emulsion, styrene-acrylic emulsion and polyhydroxy organic crosslinking agent is (40-55):(35-54):(6-10).

7. A crack-resistant and alkali-resistant continuous felt net, characterized in that, It was prepared using the preparation method as described in claims 1-6.

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