Preparation method of water-resistant glass fiber cotton

Abstract

The invention relates to the technical field of glass wool, and provides a preparation method of water-resistant glass fiber cotton, the water-resistant glass fiber cotton is composed of glass fiber and a binder, the glass fiber comprises the following raw materials by weight: 100 parts of waste glass slag, 20-25 parts of quartz sand, 15-25 parts of dolomite, 5-10 parts of pyrophyllite, 10-15 parts of feldspar, 6-8 parts of borax, 3-5 parts of szaibelyite, 1-2 parts of zirconia, and 1-2 parts of titanium dioxide. According to the technical scheme, the problems of poor water resistance and mechanical property of glass fiber cotton in related technologies are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass wool, and specifically, to a preparation method of water-resistant glass fiber wool. Background Art

[0002] As an important thermal insulation, heat insulation and sound absorption material, glass fiber wool has a wide range of applications in many fields such as construction, industry, aerospace, etc. However, traditional glass fiber wool has a significant defect, that is, its water resistance is poor. When glass fiber wool is used in an external wall insulation system or a roof insulation layer, it will inevitably come into contact with moisture such as rainwater and humidity. Due to the poor water resistance of ordinary glass fiber wool itself, moisture easily penetrates into its internal structure, resulting in a decrease in the bonding force between fibers, thereby reducing the strength of glass fiber wool and causing phenomena such as powdering and shedding, seriously affecting the service life and performance of the insulation system.

[0003] At present, although there are some methods for improving the water resistance of glass fiber wool, such as surface coating with a waterproof layer or adding a small amount of waterproof agent, these methods have disadvantages such as short-lasting effect, high cost, and complex process, and it is difficult to meet the market demand for high-performance and low-cost water-resistant glass fiber wool. Therefore, it is necessary to propose a kind of water-resistant glass fiber wool to expand the application range of glass fiber wool. Summary of the Invention

[0004] The present invention proposes a preparation method of water-resistant glass fiber wool, which solves the problems of poor water resistance and mechanical properties of glass fiber wool in the related art.

[0005] The technical solution of the present invention is as follows: The present invention proposes a kind of water-resistant glass fiber wool, which is composed of glass fiber and a binder. The glass fiber comprises raw materials with the following weight parts: 100 parts of waste glass slag, 20 - 25 parts of quartz sand, 15 - 25 parts of dolomite, 5 - 10 parts of pyrophyllite, 10 - 15 parts of feldspar, 6 - 8 parts of borax, 3 - 5 parts of ascharite, 1 - 2 parts of zirconia, 1 - 2 parts of titanium dioxide.

[0006] As a further technical solution, the content of silicon dioxide in the silica sol is 25wt% - 30wt%.

[0007] As a further technical solution, the binder comprises raw materials with the following weight parts: 100 parts of silica sol, 2 - 5 parts of polyvinyl alcohol, 0.5 - 1 part of stabilizer.

[0008] As a further technical solution, the polyvinyl alcohol is composed of a first polyvinyl alcohol and a second polyvinyl alcohol, and the viscosities of the first polyvinyl alcohol and the second polyvinyl alcohol are different.

[0009] As a further technical solution, the viscosities of the first polyvinyl alcohol and the second polyvinyl alcohol are independently 3.2 to 66.0 cps.

[0010] As a further technical solution, the degrees of alcoholysis of the first polyvinyl alcohol and the second polyvinyl alcohol are independently 98.0 to 99.0 moL%.

[0011] As a further technical solution, the viscosity of the first polyvinyl alcohol is 25.0 to 31.0 cps, and the degree of alcoholysis is 98.0 to 99.0 mol%.

[0012] As a further technical solution, the viscosity of the second polyvinyl alcohol is 5.2 to 6.0 cps, and the degree of alcoholysis is 98.0 to 99.0 mol%.

[0013] In the present invention, the polyvinyl alcohol is composed of two different types of polyvinyl alcohol with different viscosities. Through such a combination, the compressive strength and water resistance of the glass fiber cotton can be further improved.

[0014] As a further technical solution, the mass ratio of the first polyvinyl alcohol to the second polyvinyl alcohol is 8:1.

[0015] As a further technical solution, the stabilizer is a surfactant.

[0016] As a further technical solution, the surfactant includes one or both of sodium dodecyl sulfate and cetyltrimethylammonium bromide.

[0017] As a further technical solution, the binder further includes one or both of 2-amino-4-(2-hydroxyethylamino)anisole and ethylene glycol bis(o-aminophenyl) ether.

[0018] As a further technical solution, the binder includes 2-amino-4-(2-hydroxyethylamino)anisole and ethylene glycol bis(o-aminophenyl) ether.

[0019] In the present invention, further addition in the binder can improve the bonding strength of the binder. When applied to glass fibers, the compressive strength and water resistance of the glass fiber cotton can be further improved.

[0020] As a further technical solution, the mass ratio of 2-amino-4-(2-hydroxyethylamino)anisole to ethylene glycol bis(o-aminophenyl) ether is 1:1.

[0021] The present invention also provides a method for preparing water-resistant glass fiber cotton, which includes the following steps: spraying the binder on the surface of the glass fiber, and then curing and cutting to obtain the glass fiber cotton.

[0022] As a further technical solution, the dosage of the binder is 6% - 8% of the mass of the glass fiber.

[0023] The working principle and beneficial effects of the present invention are as follows: In the present invention, waste glass slag is used as the main raw material. Through reasonable component selection and synergistic action with minerals such as quartz sand and feldspar, the mechanical strength of the glass fiber cotton is improved. And the compounding of zirconia, titanium dioxide and feldspar in the components can improve the water resistance of the glass fiber cotton. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0025] In the following examples and comparative examples: Waste glass slag: 71.8% SiO2, 13.1% Na2O, 9.6% CaO, 1.3% Al2O3, 1.5% MgO; Asbestine: boron ≥ 28wt%; Zirconia: purity 99.6%; Titanium dioxide: purity ≥ 94.0%; Polyvinyl alcohol is specifically as follows:

[0026] Example 1 A preparation method of water-resistant glass fiber cotton includes the following steps: S1. Mix 100 parts of waste glass slag, 20 parts of quartz sand, 15 parts of dolomite, 5 parts of pyrophyllite, 10 parts of feldspar, 6 parts of borax, 3 parts of asbestine, 1 part of zirconia and 1 part of titanium dioxide, then melt them, and draw them into glass fibers by centrifugal spraying and stretching; S2. Mix 100 parts of silica sol, 2 parts of polyvinyl alcohol and 0.5 part of sodium dodecyl sulfate evenly to obtain a binder; wherein the content of silicon dioxide in the silica sol is 25wt%; and the polyvinyl alcohol is PVA-117K polyvinyl alcohol; S3. Spray the binder onto the surface of the glass fiber, collect, solidify, form and cut to obtain environmentally friendly glass wool; wherein the usage amount of the binder is 6% of the mass of the glass fiber.

[0027] Example 2 A preparation method of water-resistant glass fiber cotton includes the following steps: S1. Mix 100 parts of waste glass slag, 25 parts of quartz sand, 25 parts of dolomite, 10 parts of pyrophyllite, 15 parts of feldspar, 8 parts of borax, 5 parts of ascharite, 2 parts of zirconium oxide, and 2 parts of titanium dioxide, then melt them and draw them into glass fibers by centrifugal spraying and stretching; S2. Mix 100 parts of silica sol, 5 parts of polyvinyl alcohol, and 1 part of sodium dodecyl sulfate evenly to obtain a binder; the content of silicon dioxide in the silica sol is 25 wt%; the polyvinyl alcohol is PVA-117K polyvinyl alcohol; S3. Spray the binder onto the surface of the glass fibers, collect, cure, form, and cut to obtain environmentally friendly glass wool; the usage amount of the binder is 8% of the mass of the glass fibers.

[0028] Example 3 This example is different from Example 1 only in that the polyvinyl alcohol consists of PVA-117K polyvinyl alcohol and PVA-124 with a mass ratio of 8:1.

[0029] Example 4 This example is different from Example 1 only in that the polyvinyl alcohol consists of PVA-117K polyvinyl alcohol and PVA-105 polyvinyl alcohol with a mass ratio of 8:1.

[0030] Example 5 This example is different from Example 1 only in that the polyvinyl alcohol consists of PVA-117K polyvinyl alcohol and PVA-103 polyvinyl alcohol with a mass ratio of 8:1.

[0031] Example 6 This example is different from Example 1 only in that the polyvinyl alcohol is PVA-105 polyvinyl alcohol.

[0032] Example 7 This example is different from Example 4 only in step S2. In this example, step S2 is: Mix 100 parts of silica sol, 2 parts of polyvinyl alcohol, 0.5 part of sodium dodecyl sulfate, and 1 part of 2-amino-4-(2-hydroxyethylamino)anisole evenly to obtain a binder; the content of silicon dioxide in the silica sol is 25 wt%; the polyvinyl alcohol consists of PVA-117K polyvinyl alcohol and PVA-105 polyvinyl alcohol with a mass ratio of 8:1.

[0033] Example 8 This example is different from Example 7 only in that 2-amino-4-(2-hydroxyethylamino)anisole is replaced with an equal amount of ethylene glycol bis(o-aminophenyl) ether.

[0034] Example 9 This example is different from Example 7 only in that all of 2-amino-4-(2-hydroxyethylamino)anisole is replaced with a 3:1 mass ratio of 2-amino-4-(2-hydroxyethylamino)anisole and ethylene glycol bis(2-aminophenyl) ether.

[0035] Example 10 This example is different from Example 7 only in that all of 2-amino-4-(2-hydroxyethylamino)anisole is replaced with a 1:1 mass ratio of 2-amino-4-(2-hydroxyethylamino)anisole and ethylene glycol bis(2-aminophenyl) ether.

[0036] Example 11 This example is different from Example 7 only in that all of 2-amino-4-(2-hydroxyethylamino)anisole is replaced with a 1:3 mass ratio of 2-amino-4-(2-hydroxyethylamino)anisole and ethylene glycol bis(2-aminophenyl) ether.

[0037] Comparative Example 1 This comparative example is different from Example 1 only in that zirconia is replaced with an equal amount of titanium dioxide.

[0038] Comparative Example 2 This comparative example is different from Example 1 only in that titanium dioxide is replaced with an equal amount of zirconia.

[0039] Comparative Example 3 This comparative example is different from Example 1 only in that titanium dioxide and zirconia are not added.

[0040] Test Example (1) Compressive strength: The glass fiber wools in Examples 1 to 11 and Comparative Examples 1 to 3 were each prepared into specimens with dimensions of 200 mm × 200 mm × 60 mm, and the compressive strength of the specimens was measured according to the method in GB / T 25975-2018 "Rock Wool Products for External Thermal Insulation of Building Exterior Walls"; (2) Water resistance: According to the method in GB / T 5480-2017 "Test Methods for Mineral Wool and Its Products", the water absorption of the glass fiber wools in Examples 1 to 11 and Comparative Examples 1 to 3 after being immersed in water for 30 days was measured; The measurement results are shown in Table 1.

[0041] Table 1 Performance Measurement Results of Glass Fiber Wools in Examples 1 to 11 and Comparative Examples 1 to 3

[0042] Compared with Comparative Examples 1 to 3, the compressive strength and water resistance of the glass fiber wools in Examples 1 to 2 are better than those of Comparative Examples 1 to 3, indicating that by defining the raw materials in the glass fiber of the present invention, the compressive strength and water resistance of the glass fiber wool can be improved.

[0043] Compared with Example 1, the viscosity of polyvinyl alcohol was changed in Examples 3 to 6. As a result, the compressive strength and water resistance of the glass fiber cotton in Example 4 were higher than those in Example 1, Example 3, and Examples 5 to 6, indicating that when the polyvinyl alcohol in the present invention is composed of PVA-117K polyvinyl alcohol and PVA-105 polyvinyl alcohol with a mass ratio of 8:1, the compressive strength and water resistance of the glass fiber cotton can be further improved.

[0044] Compared with Example 4, the compressive strength and water resistance of the glass fiber cotton in Examples 7 to 11 were better than those in Example 4, indicating that the addition of 2-amino-4-hydroxyethylaminoanisole and / or ethylene glycol bis(o-aminophenyl) ether in the present invention can improve the compressive strength and water resistance of the glass fiber cotton. Moreover, the compressive strength and water resistance of the glass fiber cotton in Examples 9 to 11 were higher than those in Examples 7 to 8, and the compressive strength and water resistance of the glass fiber cotton in Example 10 were higher than those in Examples 9 and 11, indicating that when the mass ratio of 2-amino-4-hydroxyethylaminoanisole to ethylene glycol bis(o-aminophenyl) ether is 1:1, the compressive strength and water resistance of the glass fiber cotton can be further improved.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-resistant glass fiber wool, composed of glass fiber and a binder, characterized in that: The glass fiber comprises the following raw materials in parts by weight: 100 parts of waste glass slag, 20-25 parts of quartz sand, 15-25 parts of dolomite, 5-10 parts of pyrophyllite, 10-15 parts of feldspar, 6-8 parts of borax, 3-5 parts of magnesite, 1-2 parts of zirconium oxide, and 1-2 parts of titanium dioxide.

2. The water-resistant glass fiber wool according to claim 1, characterized in that: The binder comprises the following raw materials in parts by weight: 100 parts of silica sol, 2-5 parts of polyvinyl alcohol, and 0.5-1 part of a stabilizer.

3. The water-resistant glass fiber wool according to claim 2, characterized in that: The polyvinyl alcohol consists of a first polyvinyl alcohol and a second polyvinyl alcohol, and the first polyvinyl alcohol and the second polyvinyl alcohol have different viscosities.

4. The water-resistant glass fiber wool according to claim 3, characterized in that: The viscosity of the first polyvinyl alcohol and the second polyvinyl alcohol are independently 3.2-66.0 cps.

5. The water-resistant glass fiber wool according to claim 3, characterized in that: The alcoholysis degree of the first polyvinyl alcohol and the second polyvinyl alcohol are independently 98.0-99.0 mol%.

6. The water-resistant glass fiber wool according to claim 3, characterized in that: The mass ratio of the first polyvinyl alcohol to the second polyvinyl alcohol is 8:

1.

7. The water-resistant glass fiber wool according to claim 2, characterized in that: The stabilizer is a surfactant.

8. The water-resistant glass fiber wool according to claim 7, characterized in that: The surfactant includes one or two of sodium dodecyl sulfate and hexadecyl trimethyl ammonium bromide.

9. The water-resistant glass fiber wool according to claim 2, characterized in that: The binder also includes one or two of 2-amino-4-hydroxyethylaminoanisole and ethylene glycol di(o-aminophenyl) ether.

10. The method for preparing water-resistant glass fiber wool according to any one of claims 1 to 9, characterized in that: The following steps are involved: After the adhesive is sprayed on the surface of the glass fiber, it is cured and cut to obtain glass fiber wool.

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