Silicone Tube

Silicone hoses are flexible tubular components made of silicone rubber and auxiliary materials through precision processes, mainly used for transporting, diverting and sealing media in equipment and pipeline systems, suitable for static transportation and slight dynamic bending scenarios, and can be cut into different lengths or customized. Compared with other hoses, their advantages are prominent:
Wide temperature range: -60℃ to 250℃ (special modified types: -100℃ to 300℃), stable under extreme temperature conditions.
Excellent anti-aging: 3-5 times longer service life than ordinary rubber hoses, resistant to ozone, ultraviolet rays and oxidation.
Superior flexibility: Easy to bend and fold, small bending radius, good elastic recovery.
Non-toxic and safe: Food/medical grade hoses meet FDA, LFGB, ISO 10993 certifications, no harmful substances.
Corrosion-resistant: Tolerant to water, weak acids, weak alkalis, lubricating oil and other common media.
Good insulation and shock absorption: Suitable for electronic equipment protection and vibration relief.
Smooth inner wall: Not easy to scale or block, easy to clean, suitable for high cleanliness requirements.

The quality and performance of silicone hoses depend on the type, purity of silicone rubber and the ratio of auxiliary materials, with clear classification:
Core Silicone Rubber
MQ: Cost-effective, widely used for home appliances and electronics (-60℃~250℃).
VMQ: Vinyl-modified, better tear resistance and elasticity, suitable for automotive and chemical fields.
PMVQ: Phenyl-modified, excellent low-temperature resistance (-100℃~250℃), for special scenarios like aerospace.
Auxiliary Materials: Vulcanizing agents (determine hardness and durability), reinforcing agents (enhance strength), anti-aging agents, non-toxic colorants, toughening agents (improve flexibility).
Classification
By cross-section: Circular (most common), square, rectangular, special-shaped.
By size: Customizable inner diameter (1mm~100mm+), wall thickness (0.5mm~10mm+), length.
By use: Ordinary, food-grade, medical-grade, industrial-grade, high/low temperature-resistant.
By structure: Single-layer, double-layer, reinforced (with fiber/steel wire).

Extrusion Molding (Core Process): Suitable for mass production of uniform-section, long-length hoses. Steps: Raw material preparation → Extrusion → Vulcanization (120-180℃) → Post-processing. Advantages: High efficiency, uniform size; Disadvantages: Not for complex shapes.
Compression Molding (Auxiliary Process): Suitable for small-batch, special-shaped hoses. Steps: Raw material preparation → Mold preparation → Compression vulcanization (150-180℃) → Demolding and post-processing. Advantages: High precision;
Disadvantages: Low efficiency, high mold cost.
Core Quality Requirements: Dimensional error ±0.01-±0.1mm; smooth surface without defects; tensile strength ≥10MPa, elongation at break ≥300%; food/medical grade meets safety certifications.

Electronics: Wire protection, waterproof diversion, insulation for mobile phones, home appliances and industrial electronics.
Automotive: Medium transportation for engine, air conditioning, braking system and wire harness protection.
Medical: Infusion tubes, breathing tubes, drainage tubes (food/medical grade, high safety).
Food & Beverage: Transportation of food, beverages and drinking water for processing and packaging equipment.
Chemical: Medium transportation for pipelines, reactors and pumps (corrosion-resistant).
Others: Aerospace, low-temperature equipment, daily necessities (hot water bags, baby bottle straws) and laboratory equipment.

vs NBR Hoses: NBR has better oil resistance but narrow temperature range; Silicone has wider temperature range and better anti-aging, non-toxic.
vs FKM Hoses: FKM has stronger corrosion resistance but higher cost and poor flexibility; Silicone is more flexible, non-toxic and better at low temperatures.
vs PVC Hoses: PVC is cheap but narrow temperature range and toxic; Silicone is safe, flexible and widely applicable.
vs Ordinary Rubber Hoses: Silicone has better flexibility, temperature resistance and longer service life.

Production Problems: Bubbles (inadequate exhaust, damp raw materials); uneven thickness (insufficient pressure, mold wear); burrs/scratches (unsmooth mold); aging (over-vulcanization); delamination (poor compatibility); impurities (unclean raw materials/mold).
Usage Problems: Leakage (mismatched size, aging, scratches); aging/cracking (high temperature, ozone, expired service life); deformation/breakage (over-stretching, extrusion); swelling (incompatible media); scaling (unclean media, inadequate cleaning).

Selection: Choose MQ/VMQ for ordinary conditions, PMVQ for low temperatures; food/medical grade for corresponding scenarios; reinforced hoses for high pressure; suitable size and structure according to flow, pressure and installation space.
Installation: Clean interfaces, avoid sharp tools and over-stretching/bending; fix firmly with clamps; clean and disinfect food/medical grade hoses before installation.
Maintenance: Regular inspection and replacement (1-3 years under ordinary conditions); clean with neutral detergent; store in cool, dry and ventilated place; avoid high temperature, ozone and sharp objects.

Silicone hoses are reliable, multi-functional flexible transportation components, widely used in various industries for safe and stable media transportation. Their quality depends on raw materials and processing technology. Scientific selection, installation and maintenance can extend their service life and reduce costs. In the future, they will develop towards high precision, environmental protection and customization, providing more reliable guarantee for media transportation in various industries.