Glass formula of high-density glass fiber material

Abstract

The invention relates to the technical field of glass or glass fiber formulas, in particular to a glass formula of a high-density glass fiber material, and the glass formula for preparing the glass fiber material mainly comprises the following components in percentage by weight: 53 to 56 percent of SiO2, 8 to 13 percent of B2O3, 13 to 15 percent of Al2O3, 18 to 21 percent of CaO, 3 to 4 percent of MgO, less than or equal to 0.6 percent of R2O and less than or equal to 0.5 percent of Fe2O3. The glass density of the glass fiber material is larger than 2.6 g / m, the density range of conventional alkali-free glass fibers is broken through, and the subsequent bonding effect of the glass fibers and resin and the product strength of the composite material are improved.

Description

Technical Field

[0001] This invention relates to the field of glass fiber formulation technology, specifically a glass formulation for high-density glass fiber materials. Background Technology

[0002] In glass fiber systems, composite products are typically obtained by bonding alkali-free glass fiber to resin. The preparation process requires the glass fiber surface to be in contact with the resin, and a surface treatment agent is applied to the glass fiber to create an adhesive effect. Glass fiber is generally cylindrical. To improve the adhesion between glass fiber and resin, it is necessary to maximize the surface area of ​​the glass fiber. Higher glass fiber density results in a smaller volume and a larger surface area. In existing technologies, the density of alkali-free glass fiber is typically 2.54-2.57 g / cm³. This invention aims to break through this conventional density range and further improve the adhesion between glass fiber and resin by providing a glass formulation for a high-density glass fiber material. Summary of the Invention

[0003] The purpose of this invention is to provide a glass formulation for a high-density glass fiber material. The glass density of the prepared glass fiber material is greater than 2.6 g / m³, which breaks through the density range of conventional alkali-free glass fiber, and improves the subsequent bonding effect between glass fiber and resin as well as the product strength of the composite material.

[0004] To address the aforementioned technical problems, this invention provides a glass formulation for a high-density glass fiber material. The glass formulation mainly comprises SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 53-56%, the content of B2O3 is 8-13%, the content of Al2O3 is 13-15%, the content of CaO is 18-21%, the content of MgO is 3-4%, the content of R2O is less than or equal to 0.6%, and the content of Fe2O3 is less than or equal to 0.5%. The glass density of this glass fiber material is greater than 2.6 g / m³.

[0005] Preferably, by weight percentage, the content of SiO2 is 53-56%, the content of B2O3 is 8-10%, the content of Al2O3 is 13-15%, the content of CaO is 18-21%, the content of MgO is 3-4%, the content of R2O is less than or equal to 0.6%, and the content of Fe2O3 is less than or equal to 0.5%.

[0006] Preferably, R2O is mainly Na2O and K2O.

[0007] On the other hand, the present invention also provides a glass formulation for a high-density glass fiber material, the glass formulation mainly comprising SiO2, B2O3, Al2O3, CaO, MgO, R2O and Fe2O3, wherein, by weight percentage, the content of SiO2 is 54.1%, the content of B2O3 is 8.1%, the content of Al2O3 is 13.1%, the content of CaO is 20.5%, the content of MgO is 3.9%, and the sum of the contents of R2O and Fe2O3 is 0.3%; the glass density of the glass fiber material is 2.65 g / m³.

[0008] On the other hand, the present invention also provides a glass formulation for a high-density glass fiber material, the glass formulation mainly comprising SiO2, B2O3, Al2O3, CaO, MgO, R2O and Fe2O3, wherein, by weight percentage, the content of SiO2 is 53.7%, the content of B2O3 is 9.6%, the content of Al2O3 is 13.8%, the content of CaO is 18.6%, the content of MgO is 3.6%, the sum of the contents of R2O and Fe2O3 is 0.7%, and the content of R2O is less than or equal to 0.6%; the glass density of the glass fiber material is 2.71 g / m³.

[0009] The beneficial effects of this invention are:

[0010] The glass fiber material prepared by the glass formulation of the high-density glass fiber material of this invention has a glass density greater than 2.6 g / m³, which breaks through the density range of conventional alkali-free glass fiber, increases the surface area of ​​the glass fiber, and improves the subsequent bonding effect between the glass fiber and the resin, as well as the product strength of the composite material. Detailed Implementation

[0011] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0012] Example 1

[0013] A glass formulation for a high-density glass fiber material is disclosed. The glass formulation for preparing this glass fiber material mainly includes SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 54.1%, the content of B2O3 is 8.1%, the content of Al2O3 is 13.1%, the content of CaO is 20.5%, the content of MgO is 3.9%, and the sum of the contents of R2O and Fe2O3 is 0.3%. The glass density of this glass fiber material is 2.65 g / m³.

[0014] Example 2

[0015] A glass formulation for a high-density glass fiber material is disclosed. The glass formulation mainly comprises SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 53.7%, the content of B2O3 is 9.6%, the content of Al2O3 is 13.8%, the content of CaO is 18.6%, the content of MgO is 3.6%, the sum of the contents of R2O and Fe2O3 is 0.7%, and the content of R2O is less than or equal to 0.6%. The density of the prepared glass is 2.71 g / m³.

[0016] Comparative Example

[0017] A glass formulation for a high-density glass fiber material is disclosed. The glass formulation mainly comprises SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 54.1%, the content of B2O3 is 6.4%, the content of Al2O3 is 13.9%, the content of CaO is 20.5%, the content of MgO is 3.9%, and the sum of the contents of R2O and Fe2O3 is 1.2%, wherein the content of R2O is less than or equal to 0.8%. The density of the prepared glass is 2.51 g / m³.

[0018] The glass formulation of this invention is based on a SiO2-Al2O3-B2O3 system. In this glass formulation, SiO2 serves as the main framework, providing structural stability, electrical insulation, chemical durability, and strength; Al2O3 serves as an auxiliary framework and stabilizer, improving chemical stability, mechanical strength, and reducing crystallization tendency; B2O3 serves as a flux and performance modifier, significantly reducing melting temperature (energy saving) while improving thermal and electrical properties; CaO and MgO serve as flux and stabilizers, adjusting chemical durability and crystallization performance; the content of R2O (i.e., the content of Na2O and K2O) does not exceed 0.6%; Fe2O3 can improve melt uniformity and reduce bubble defects in glass fiber or glass products.

[0019] During the preparation process, it was found that the Al2O3 content could be appropriately increased to improve the glass density. However, increasing the Al2O3 content would increase the drawing temperature and the difficulty of the process. When the Al2O3 content exceeded 15%, the drawing temperature increased from 1250℃ to 1350℃, and the breakage rate increased significantly to 1.8 times / h. Conversely, when the content was below 13%, the drawable temperature range for the glass density narrowed to 30℃, and the breakage rate increased significantly. Therefore, the Al2O3 content was controlled at 13-15%.

[0020] Meanwhile, boron can improve the clarity and uniformity of molten glass, remove microbubbles, and increase density. However, it has been found that if the B2O3 content is higher than 13%, the cost of molten glass will increase significantly. At the same time, the corrosiveness of boric acid will affect the normal operation of the feeding equipment. If the B2O3 content is less than 8%, the operating temperature will increase, and the phenomenon of shavings will also increase significantly. Therefore, the B2O3 content should be controlled between 8-13%. However, in practical applications, for cost considerations, the B2O3 content is preferably controlled between 8-10%.

[0021] A comparison of the fiber drawing process parameters for Examples 1, 2, and the comparative examples is shown in Table 1 (here, the fiber number refers to the weight of 1000 meters of yarn):

[0022] Table 1

[0023] Product Name Fiber number Wire drawing temperature Number of severed heads Filament count Fiber diameter Example 1 33tex 1290℃ 0.8 times / hour 0.78 times / hour 19.5 micrometers Example 2 33tex 1330℃ 0.85 times / hour 0.85 times / hour 19.3 micrometers Comparative Example 33tex 1300℃ 1.1 times / hour 0.8 times / hour 20.0 micrometers

[0024] Table 2 shows a comparison of the production and performance parameters of Examples 1, 2, and the comparative examples:

[0025] Table 2

[0026] Product Name Moisture content Fracture strength Example 1 22.3% 2.79 MPa Example 2 23.1% 2.85 MPa Comparative Example 21.5% 2.4 MPa

[0027] Referring to Table 1, a comparative analysis was conducted between the comparative example and Examples 1 and 2. The density of Example 1 was 2.65 g / m³, and the density of Example 2 was 2.71 g / m³. The fiber density of Example 1 increased by 5.6% compared to the comparative example, while the fiber density of Example 2 increased by 7.9%. By testing the fiber diameter, the fiber diameter of Example 1 decreased by 2.5%, and the fiber diameter of Example 2 decreased by 3.5%.

[0028] As is well known, finer fiber diameters are easier to coat with surface treatment agents during the drawing process and can be more fully impregnated by resin during use, reducing the voids on the glass fiber surface and thus improving the bonding effect between glass fiber and resin.

[0029] Referring to Table 2, by comparing the moisture content of each embodiment during the fiber drawing process, the higher the moisture content, the easier it is for the glass fiber surface to be wetted by water, and the better the effect of the glass fiber surface treatment agent coating. Obviously, the moisture content of Embodiments 1 and 2 of the present invention is significantly better than that of the comparative example. In addition, the glass fiber breaking strength of Embodiments 1 and 2 is significantly better than that of the comparative example. By testing the pull-out strength of the resin, Embodiment 2 has a higher pull-out strength. A higher pull-out strength indicates better bonding performance between the glass fiber and the resin, and higher product strength of the composite material.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present 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 glass formulation for a high-density glass fiber material, characterized in that, The glass formulation mainly includes SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 53-56%, the content of B2O3 is 8-13%, the content of Al2O3 is 13-15%, the content of CaO is 18-21%, the content of MgO is 3-4%, the content of R2O is less than or equal to 0.6%, and the content of Fe2O3 is less than or equal to 0.5%. The glass density of this glass fiber material is greater than 2.6 g / m³.

2. The glass formulation of a high-density glass fiber material according to claim 1, characterized in that, By weight percentage, the content of SiO2 is 53-56%, the content of B2O3 is 8-10%, the content of Al2O3 is 13-15%, the content of CaO is 18-21%, the content of MgO is 3-4%, the content of R2O is less than or equal to 0.6%, and the content of Fe2O3 is less than or equal to 0.5%.

3. The glass formulation of a high-density glass fiber material according to claim 1 or 2, characterized in that, R2O mainly consists of Na2O and K2O.

4. A glass formulation for a high-density glass fiber material, characterized in that, The glass formulation mainly includes SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 54.1%, the content of B2O3 is 8.1%, the content of Al2O3 is 13.1%, the content of CaO is 20.5%, the content of MgO is 3.9%, and the sum of the contents of R2O and Fe2O3 is 0.3%. The glass density of this glass fiber material is 2.65 g / m³.

5. A glass formulation for a high-density glass fiber material, characterized in that, The glass formulation mainly includes SiO2, B2O3, Al2O3, CaO, MgO, R2O, and Fe2O3. By weight percentage, the content of SiO2 is 53.7%, the content of B2O3 is 9.6%, the content of Al2O3 is 13.8%, the content of CaO is 18.6%, the content of MgO is 3.6%, the sum of the contents of R2O and Fe2O3 is 0.7%, and the content of R2O is less than or equal to 0.6%. The glass density of this glass fiber material is 2.71 g / m³.