Material preparation
Glass bottle body: Made of high-transparency, chemically resistant soda-lime glass or PETG plastic (environmentally friendly material).
Bottle cap and brush head: Usually made of PP/PE plastic and formed by injection molding process; The bristles are made of nylon or synthetic fibers.
Sealing component: Rubber or silicone gasket to ensure the sealing of the bottle mouth.
Glass bottle molding (taking glass bottles as an example)
High-temperature melting: The raw glass melts at a high temperature of 1400-1600℃.
Mold forming: Molten glass is injected into the mold and shaped through the blowing (hollow bottle) or pressing (solid base) process.
Annealing treatment: Slow cooling to eliminate internal stress and prevent cracking.
Production of plastic accessories
Injection molding: Plastic components such as bottle caps and brush heads are injection molded at high temperatures in an injection molding machine and then demolded after cooling.
Brush head assembly: Nylon bristles are implanted into the plastic brush handle and trimmed to a uniform length (usually 8-12mm).
Assembly and Quality Inspection
Automated assembly: The machine inserts the brush head into the bottle cap, installs the sealing gasket, and tightens it against the glass bottle.
Sealing test: Vacuum detection for air leakage to ensure no evaporation during long-term storage.
Appearance inspection: Remove defective products such as bubbles and scratches.
Packaging and Sterilization
Ultraviolet disinfection: Some high-end products undergo aseptic treatment.
Labeling and boxing: Print labels (including brand, capacity, and composition), and pack and leave the factory.