Preparation method of high borosilicate straw cup

Abstract

The application relates to the high-boron-silicon processing field and particularly relates to a preparation method of a high-boron-silicon straw cup, which comprises the following steps: preparing raw materials according to the following weight percentage: quartz sand 60%, borax 14%, boric acid 2%, aluminum hydroxide 2.2% and broken glass 21.8%; heating the prepared raw materials to be melted to form uniform glass liquid, then performing clarification and homogenization to form high-boron-silicon glass; blowing the high-boron-silicon glass to be shaped to obtain a semi-finished product; performing annealing treatment on the semi-finished product to obtain a finished product. The straw cup product manufactured by adopting the high-boron-silicon glass material and the strictly controlled manufacturing process replaces the original soda-lime glass product, the product has better strength and better cold-heat resistance, the cup is not easy to burst, and the product is safer to use.

Description

Technical Field

[0001] This invention relates to the field of high borosilicate processing, specifically a method for preparing a high borosilicate straw cup. Background Technology

[0002] Straw cups are a common type of cup on the market. Currently, most straw cups are made of soda-lime glass, a silicate glass primarily composed of silicon dioxide (SiO2), with sodium oxide (Na2O) and calcium oxide (CaO) added as modifiers. It has high chemical stability and low cost, but its high coefficient of thermal expansion results in poor resistance to rapid heating and cooling, with a heat resistance temperature of approximately 50-80℃. Additionally, soda-lime glass has low mechanical strength and easily shatters into sharp fragments upon impact.

[0003] Therefore, straw cups made of soda-lime glass are prone to shattering when filled with hot water, which can cause burns or cuts from the impact fragments, posing a potential hazard to users. Summary of the Invention

[0004] This invention provides a method for preparing a high borosilicate straw cup, which can solve the problems in the background art. This invention provides the following technical solution: A method for preparing a high borosilicate straw cup includes the following steps: Ingredients: The raw materials are prepared according to the following weight percentages: 60% quartz sand, 14% borax, 2% boric acid, 2.2% aluminum hydroxide, and 21.8% crushed glass; Molten material: The prepared raw materials are heated to melt to form a uniform glass liquid, which is then clarified and homogenized to form high borosilicate glass; Molding: High borosilicate glass is blown into shape to obtain a semi-finished product; Annealing: Annealing the semi-finished product will yield the finished product.

[0005] As a further aspect of the present invention: the borax used is pentahydrate borax, and the purity of boric acid is not less than 99%.

[0006] As a further aspect of the present invention: the particle size of the quartz sand is not less than 66 mesh, and the proportion of quartz sand with a particle size greater than 120 mesh does not exceed 10%.

[0007] As a further aspect of the present invention, the raw material is heated to a melting temperature of 1520-1550°C.

[0008] As a further aspect of the present invention: high borosilicate glass is blown into shape using 8 sets of 108 rows of blown glass.

[0009] As a further aspect of the present invention: the annealing temperature is 530℃-580℃, and the annealing time is 80-125 minutes.

[0010] Compared with the prior art, the beneficial effects of the present invention are: This invention produces a straw cup using high borosilicate glass and a strictly controlled manufacturing process, replacing the original soda-lime glass product. The product of this invention has better strength, better resistance to hot and cold temperatures, is less prone to cracking, and is safer to use. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the first type of straw cup obtained by the preparation method of the high borosilicate straw cup in this embodiment of the invention.

[0012] Figure 2 This is a schematic diagram of the second type of straw cup obtained by the preparation method of the high borosilicate straw cup in the embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of the third type of straw cup obtained by the preparation method of the high borosilicate straw cup in the embodiments of the present invention.

[0014] Figure 4 This is a schematic diagram of the fourth type of straw cup obtained by the preparation method of the high borosilicate straw cup in the embodiments of the present invention. Detailed Implementation

[0015] The technical solutions of 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.

[0016] Sodium-calcium glass is primarily composed of silicon dioxide (70-75% by mass), forming a ternary system by adding 12-15% sodium oxide and 8-12% calcium oxide. Sodium oxide acts as a flux during the melting process, and its decomposition produces sodium... + Ions break the Si-O-Si bond network, effectively reducing the glass viscosity and melting point to approximately 1000℃, and improving its forming properties. The addition of calcium oxide enhances chemical stability and prevents the glass from hydrolyzing in aqueous solutions.

[0017] Soda-lime glass has a thickness of 8.5-9.5 × 10⁻⁶. -6 Its coefficient of thermal expansion is limited to approximately 50°C, resulting in poor resistance to rapid heating and cooling. It can only withstand temperature differences of about 50°C. The maximum long-term operating temperature is 80°C, and it maintains a Class 3 water resistance standard even under a 98°C test environment.

[0018] High borosilicate tubing and rods are characterized by a low coefficient of thermal expansion (coefficient of thermal expansion: 3.3 ± 0.1 x 10⁻⁶ at 0-300℃).-6 K -1 It is a special glass material with high temperature resistance (softening point 820℃, high thermal stability, and resistance to temperature difference of up to 150℃), high strength, high hardness, high light transmittance, and high chemical stability.

[0019] High borosilicate glass is a type of glass with sodium oxide (Na2O), boron oxide (B2O3), and silicon dioxide (SiO2) as its basic components. This glass has a high boron and silicon content, with mass fractions of boron (12.5-13.5%) and silicon (78-80%).

[0020] High borosilicate glass is made by adding glaze water glass sand, soda water and lime during the manufacturing process of ordinary silicate glass.

[0021] The coefficient of linear expansion of high borosilicate glass is (3.3 ± 0.1) × 10⁻⁶. -6 K -1 Borosilicate glass has a density only about one-third that of ordinary glass, which reduces the impact of temperature gradient stress, resulting in stronger fracture resistance. Even with sudden temperature changes, high borosilicate glass is less prone to breakage. High borosilicate glass also exhibits very small shape deviations; when it does break, it forms large cracks rather than shattering into particles. Furthermore, high borosilicate glass has low dispersion and a relatively low refractive index.

[0022] Therefore, using borosilicate glass to manufacture straw cups can reduce or avoid breakage accidents and the resulting injuries.

[0023] The specific implementation of the present invention will be described in detail below with reference to specific embodiments. Example 1

[0024] A method for preparing a high borosilicate straw cup includes the following steps: Ingredients: The raw materials are prepared according to the following weight percentages: 60% quartz sand, 14% borax, 2% boric acid, 2.2% aluminum hydroxide, and 21.8% crushed glass. Among them, the borax is pentahydrate borax, the purity of boric acid is not less than 99%, the particle size of quartz sand is not less than 66 mesh, and the proportion of quartz sand with a particle size greater than 120 mesh does not exceed 10%. Melt: The prepared raw materials are heated to 1520℃ until they melt, and the weight loss during melting is less than 0.05% to form a uniform glass melt. Then, it is clarified and homogenized to form high borosilicate glass. Molding: High borosilicate glass is blown into shape using 8 sets of 108 rows of machines to obtain semi-finished products; Annealing: The semi-finished product is annealed at 530℃ for 125 minutes to obtain the finished product. See the image below for the finished product's appearance. Figure 1 .

[0025] The composition of the high borosilicate glass was analyzed, and the mass fractions of each component were as follows: aluminum oxide 2.1%, silicon dioxide 79.6%, ferric oxide 0.02%, calcium oxide 0.03%, magnesium oxide 0.01%, potassium oxide 0.05%, sodium oxide 4.71%, titanium dioxide 0.02%, zirconium dioxide 0.04%, boron oxide 13.3%, barium oxide less than 0.05%, copper oxide less than 0.01%, cobalt oxide less than 0.01%, lithium oxide less than 0.01%, lead monoxide less than 0.01%, zinc oxide less than 0.01%, strontium oxide less than 0.01%, manganese monoxide 0.02%, rubidium oxide less than 0.01%, cesium oxide less than 0.01%, cadmium oxide less than 0.01%, phosphorus pentoxide less than 0.05%, fluorine less than 0.05%, sulfur trioxide less than 0.05%, nickel oxide less than 0.01%, and chromium trioxide less than 0.01%. Example 2

[0026] A method for preparing a high borosilicate straw cup includes the following steps: Ingredients: The raw materials are prepared according to the following weight percentages: 60% quartz sand, 14% borax, 2% boric acid, 2.2% aluminum hydroxide, and 21.8% crushed glass. Among them, the borax is pentahydrate borax, the purity of boric acid is not less than 99%, the particle size of quartz sand is not less than 66 mesh, and the proportion of quartz sand with a particle size greater than 120 mesh does not exceed 10%. Melt: The prepared raw materials are heated to 1530℃ until they melt, and the weight loss during melting is less than 0.05% to form a uniform glass melt. Then, it is clarified and homogenized to form high borosilicate glass. Molding: High borosilicate glass is blown into shape using 8 sets of 108 rows of machines to obtain semi-finished products; Annealing: The semi-finished product is annealed at 550℃ for 110 minutes to obtain the finished product. See the image below for the finished product's appearance. Figure 2 . Example 3

[0027] A method for preparing a high borosilicate straw cup includes the following steps: Ingredients: The raw materials are prepared according to the following weight percentages: 60% quartz sand, 14% borax, 2% boric acid, 2.2% aluminum hydroxide, and 21.8% crushed glass. Among them, the borax is pentahydrate borax, the purity of boric acid is not less than 99%, the particle size of quartz sand is not less than 66 mesh, and the proportion of quartz sand with a particle size greater than 120 mesh does not exceed 10%. Melt: The prepared raw materials are heated to 1540℃ until they melt, and the weight loss during melting is less than 0.05% to form a uniform glass melt. Then, it is clarified and homogenized to form high borosilicate glass. Molding: High borosilicate glass is blown into shape using 8 sets of 108 rows of machines to obtain semi-finished products; Annealing: The semi-finished product is annealed at 560℃ for 95 minutes to obtain the finished product. See the image below for the finished product's appearance. Figure 3 . Example 4

[0028] A method for preparing a high borosilicate straw cup includes the following steps: Ingredients: The raw materials are prepared according to the following weight percentages: 60% quartz sand, 14% borax, 2% boric acid, 2.2% aluminum hydroxide, and 21.8% crushed glass. Among them, the borax is pentahydrate borax, the purity of boric acid is not less than 99%, the particle size of quartz sand is not less than 66 mesh, and the proportion of quartz sand with a particle size greater than 120 mesh does not exceed 10%. Melt: The prepared raw materials are heated to 1550℃ until they melt, and the weight loss during melting is less than 0.05% to form a uniform glass melt. Then, it is clarified and homogenized to form high borosilicate glass. Molding: High borosilicate glass is blown into shape using 8 sets of 108 rows of machines to obtain semi-finished products; Annealing: The semi-finished product is annealed at 580℃ for 80 minutes to obtain the finished product. See the image below for the finished product's appearance. Figure 4 .

[0029] The preparation method of this invention consists of four basic processes: batching, melting, forming, and annealing. After precise batching, the raw materials are heated to form a homogeneous glass melt. Temperature fluctuations, liquid level stability, and pressure are strictly controlled to allow the formation of high borosilicate salts, thereby obtaining high borosilicate glass. After clarification and homogenization, it is blown into shape, and finally annealed to eliminate residual stress inside the glass, thus obtaining the finished product.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a high borosilicate straw cup, characterized in that, Includes the following steps: Ingredients: The raw materials are prepared according to the following weight percentages: 60% quartz sand, 14% borax, 2% boric acid, 2.2% aluminum hydroxide, and 21.8% crushed glass; Molten material: The prepared raw materials are heated to melt to form a uniform glass liquid, which is then clarified and homogenized to form high borosilicate glass; Molding: High borosilicate glass is blown into shape to obtain a semi-finished product; Annealing: Annealing the semi-finished product will yield the finished product.

2. The method for preparing the high borosilicate straw cup according to claim 1, characterized in that, The borax used is pentahydrate borax, and the purity of boric acid is not less than 99%.

3. The method for preparing the high borosilicate straw cup according to claim 1, characterized in that, The quartz sand has a particle size of not less than 66 mesh, and the proportion of quartz sand with a particle size greater than 120 mesh does not exceed 10%.

4. The method for preparing the high borosilicate straw cup according to claim 1, characterized in that, The raw material is heated to a melting temperature of 1520-1550℃.

5. The method for preparing the high borosilicate straw cup according to claim 1 or 4, characterized in that, High borosilicate glass is blown into shape using 8 sets of 108 rows of machines.

6. The method for preparing the high borosilicate straw cup according to claim 1 or 4, characterized in that, The annealing temperature is 530℃-580℃, and the annealing time is 80-125 minutes.

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