I. Product Overview

　　Glass spheres for glass fiber are spherical glass intermediates meticulously formulated and melted at high temperatures, specifically designed for the production of continuous glass fibers. They are not the final product but rather a critical raw material in the glass fiber manufacturing process.

　　Its core function is to re-melt through secondary heating within the glass fiber drawing furnace (kiln), after which the molten glass is drawn at extremely high speeds through the tiny pores of a platinum-rhodium alloy die plate (similar to a spinneret), forming continuous glass fibers with diameters ranging from just a few micrometers to about 20 micrometers.

　　Simply put, glass spheres are the result of "pre-optimizing" and "standardizing" the complex glass formulation and melting process, ensuring stable, efficient, and high-quality outcomes for subsequent wire-drawing operations.

II. Key Product Features

　　1. Highly uniform composition: Ensuring that each batch of glass spheres has an exactly consistent chemical makeup is essential for producing glass fibers with stable performance and a low breakage rate.

　　2. Precise geometric shape and dimensions: Spherical shapes with uniform diameters (typically ranging from Φ12mm to Φ20mm) ensure even heating within the wire-drawing furnace, stable melting rates, and smooth, automated feeding.

　　3. Extremely low defect levels: We strictly control internal defects such as bubbles, crystals (crystalline impurities), and streaks. Even the slightest imperfection can lead to fiber breakage during high-speed drawing processes.

　　4. Specific chemical properties: Depending on the glass type, it exhibits unique resistance to chemicals, electrical insulation, and mechanical performance.

　　5. Specific high-temperature viscosity and crystallization performance: This is one of the most critical technical indicators. The glass spheres must exhibit an appropriate high-temperature viscosity at the drawing temperature, and their upper crystallization limit temperature should be low enough to prevent crystal precipitation that could clog the die holes during the process.

III. Main Types and Technical Parameters

　　Fiberglass using glass spheres is primarily classified based on their glass composition (which determines the performance of the final fibers):

　　The glass sphere is primarily characterized by its chemical resistance and electrical insulation properties, boasting excellent acid resistance, chemical corrosion resistance, mechanical strength, and weatherability. It is widely used in aerospace, automotive manufacturing, and the field of chemical corrosion protection—such as in the production of fiber-reinforced plastic tanks, pipelines, and chimneys for chemical applications. Among these applications, fiberglass (glass-reinforced plastic) stands out as the most commonly used material, accounting for over 90% of global production.

　　Key Performance Indicators:

　　· Chemical composition: Strictly controlled within an extremely narrow range.
　　· Bubble density: The number and size of bubbles within a given volume are strictly limited.
　　· Stones and Crystals: No stones or crystals that could affect wire drawing are allowed.
　　· Roundness and dimensional tolerance: Extremely high precision requirements.
　　· Crystallization temperature: Must be significantly lower than the drawing operation temperature.

IV. Introduction to the Manufacturing Process

　　The manufacturing of glass spheres is itself a sophisticated process:
　　Ingredients → High-temperature melting (tank furnace) → Homogenization and clarification → Shaping (balling machine) → Annealing → Cooling → Screening → Inspection → Packaging

V. Major Application Areas (produced by drawing into glass fibers)

　　Glass fiber is the "skeleton" of modern industry, with applications everywhere:

　　· Electronics & Electricals: Core reinforcement material for printed circuit boards (PCBs), insulating components for electronic devices.
　　· Transportation: Lightweight composite materials (fiberglass) for automotive bodies and components, high-speed train carriages, and ship hulls.
　　· Building materials: Glass fiber reinforced cement (GRC), thermal insulation materials, waterproof membranes, and mesh fabrics.
　　· Eco-friendly energy: Wind turbine blades, flue gas filtration bags.
　　· Aerospace: High-performance composite materials for aircraft radar domes, fuselage components, and more.
　　· Daily life: Sports equipment, amusement facilities, and housings for household appliances.