Silicone Sleeve With Thermal Stability And Chemical Stability

- Oct 17, 2017 -

At present, in pharmaceutical production, Silicone Sleeve is often used for liquid transmission, peristaltic pumps and irrigation operations.

Silicones are commercial names for many products, but most are made of Poly two methyl siloxane (PDMS). These polymers are characterized by high covalent bonding strength, resistance to cracked chains (organic silicon has ultraviolet (UV) stability, thermal stability and chemical stability, so easy to sterilize). The polar main chain is prone to break-breaking chains, but the methyl groups on the chain can provide protective action.

Therefore, the organic silicon has hydrophobic, water in the Poly two methyl siloxane (PDMS) model surface contact angle is higher, is 108 °. Because of this hydrophobicity,Silicone Sleeve in the absence of surfactant, silicone and water medium do not react, only in the strong alkali or strong acid environment will occur.

The hose is packaged in a 50-foot coil and is individually packed in a double-layer sealed polyethylene bag after extrusion. It is worth mentioning that because Siloxane has thermosetting, they can not be processed like thermoplastic. For the same reason, they cannot be thermally sealed; therefore, when connected,Silicone Sleeve silicone tube is sheathed on the hose Barb joint, and two root ties are fastened from the opposite direction and the hose is fastened. Co-molding is feasible and sometimes used in the field of medical devices.

The transparency of Silicones is best described as "translucent" compared with some organic thermoplastic plastics. The result is that silicone elastomers made of hoses are made of silicone polymers and amorphous silica. Since the two materials have different refractive index and do not have a specific mixing method to match them, all silicone tubes are translucent.

After curing, silicone elastomers exhibit significant mechanical properties, including medium hardness and high break elongation, but lower tensile strength than polyurethane (PU). They have a sticky surface and a higher friction coefficient than PTFE, but are much less rigid. Because of their hydrophobicity and excellent electrical insulators, they attract dust. Their operating temperature range is larger than that of polyvinyl chloride (PVC).

Silicone Sleeve in silicone tubing may include: extrusion lines or gels (which may be caused by premature solidification in the extruder); Bubbles (moisture in the solidification process may be absorbed by the cooling rollers of the two rollers to form vapor, or h-si≡ with the hydroxyl matter in the platinum-cured product to form hydrogen); particulate contamination.

Determining the limits of these defects is not an easy task, but they should be described in detail in the vendor's sales specifications. ISO standards related to silicone elastomers for hose extrusion are even referenced in visual inspection. Other issues related to mechanical properties relate to footprint and handling. The problem here is to use the smallest footprint to "manage" the hose in pharmaceutical production while avoiding kinks and other problems. The variables to be considered include the bending radius (the radius of the bending portion of the hose measured at the most inner surface of the bending part) and the bending force (the stress required to bend to the specified radius).

Silicone tube can sometimes be printed through the external mark, but because its surface can be lower, ink adhesion is not good, using commonly used solvents in the cleaning process can be easily erased. Silicone can also be mixed color. Barium sulfate is commonly used as a white filler for substrate process color, or for X-ray impervious medical devices for coextrusion.

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