会社のニュース Preventing Paint Corrosion and Tube Swelling: How Automated Spray Lines Utilize UPE Hoses to Control Fluid Stability

Preventing Paint Corrosion and Tube Swelling: How Automated Spray Lines Utilize UPE Hoses to Control Fluid Stability

In modern industrial liquid coating operations, solvent-based coatings (such as polyurethane and epoxy paints) are highly aggressive toward paint supply lines due to their high concentration of ketones, esters, and aromatic hydrocarbons. Traditional PU or standard PVC delivery hoses are prone to swelling, softening, or internal delamination under these harsh conditions, which inevitably leads to spray nozzle clogging and catastrophic system pressure drops. From the dual perspectives of fluid chemistry and material longevity, this article examines the technical value of 16×12mm and 25×19mm UPE (Ultra-High Molecular Weight Polyethylene) corrosion-resistant paint hoses in automated paint supply systems.

H3: 1. Near-Inert Chemical Chain Prevents Swelling Caused by Solvent-Based Paints

When high-volume automotive parts or industrial machinery enclosures undergo surface finishing in automated spray booths, the fluid delivery lines must withstand prolonged internal exposure to aggressive solvents like xylene and acetone. The UPE material, with its exceptionally high molecular weight, establishes a parametric shield on both physical and chemical levels:

• Zero Swelling Penetration: The UPE hose exhibits near-inert resistance to highly polar solvents including esters and ketones. When conveying highly corrosive curing agents or high-solid coatings, the internal wall suffers zero swelling or moisture absorption and releases no plasticizer impurities, completely eliminating secondary coating contamination caused by tube degradation.

• Maintaining Constant Flow Cross-Section: By preventing chemical swelling, the internal diameter of the tubing suffers no inward restriction during long-term operation. This ensures consistent fluid resistance, allowing the output pressure waveform of fluid delivery systems (such as gear pumps or diaphragm pumps) to remain perfectly stable.

H3: 2. Adapting to Multi-Axis Spray Robots: High-Frequency Flex Life and Wide Operating Temperatures

In industrial facilities across diverse climates like Western countries and the Middle East, the environmental temperature extremes combined with high-speed robotic reciprocation place rigorous demands on the mechanical strength of the tubing:

• All-Weather Physical Stability from -40°C to +80°C: The UPE hose maintains its substrate mechanical toughness across a broad operating range . Whether exposed to the high-temperature environments of non-air-conditioned tropical workshops in the Middle East or the freezing sub-zero winter chills of northern Western countries, the tube avoids thermal softening deformation and low-temperature brittle cracking, ensuring year-round process consistency for the production line.

• Low Friction Modulus Reduces Reciprocating Wear: Its exceptionally low internal surface roughness ($Ra le 0.4mutext{m}$) minimizes paint scaling and flow resistance. Furthermore, its smooth outer wall drastically reduces tube-to-tube frictional drag when multiple lines are bundled together on robotic arms executing high-frequency articulation (with bending radius $le 8 times text{O.D.}$). This fundamentally eliminates unexpected line bursts and downtime caused by external abrasive wear.