FAQ
No. Platinum-catalyzed addition cure proceeds through a hydrosilylation reaction that forms Si–C bonds; the only byproduct is ethanol, which volatilizes at processing temperatures and does not remain in the cured matrix.
The fundamental cause is the low surface energy of silicone, typically in the range of 20–30 mN/m, which is well below the surface tension of most printing inks.
High-clarity silicone tubing is sensitive to deviations at every stage of production, and the impact of any shortcoming is immediately visible in the finished tube as haze, cloudiness, or color shift.
Yes. Color non-uniformity in the finished tube is one of the most visible indicators of compounding quality.
White spots and gel particles are distinct defects with different root causes.
Cure conditions determine the degree of crosslinking, which in turn controls essentially all of the tubing’s functional properties.
Yes. Flash and uneven edges are among the most direct manifestations of tooling deficiencies.
The challenges fall into three areas: material compatibility, tooling precision, and process coordination.
Tolerance control in silicone tube extrusion requires simultaneous management of tooling design, process parameters, and in-process monitoring.
Bubble formation typically traces back to raw materials, process control, or tooling. On the materials side, impurities or residual moisture in fillers such as fumed silica can release gas during the high-temperature cure cycle, leaving voids in the tube wall.
The standard framework is ISO 10993, which defines a risk-based approach to biological evaluation of medical device materials. The process starts with a material characterization phase, where all chemical constituents are identified and assessed for known toxicity.
It does, to a greater degree than most thermoplastics. Silicone is an excellent electrical insulator and accumulates static charge through friction, which electrostatically attracts airborne particles, fibers, and dust.
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