Method for applying a peCVD lubricating layer using a moving gas inlet
A technology for lubricating coatings and objects, applied in the field of applying PECVD lubricating layers using moving gas inlets, can solve problems such as no lubrication, achieve low plunger force, reduce manufacturing costs, and reduce complexity
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[0203] The present invention will now be explained in more detail with reference to the following examples, but it should be understood that the invention is not to be construed as being limited thereto.
example 1
[0204] Example 1 - Phase 2 Power Increase
[0205] To reduce the number of sub-visible particles produced by lubricious coatings in syringes filled with aqueous solutions, stage 2 power was increased. Tables 1 and 2 describe the coating settings used in this example and their effects, respectively.
[0206] Table 1 describes the coating settings used to generate the particle count results in Table 2. Table 2 provides particle count data from FlowCAM. Fill the syringe with 1 mL of filtered water and shake horizontally by hand for 10 seconds. Use a pipette to remove liquid and dispense into FlowCAM. Table 2 shows that increasing stage 2 power during the PECVD process significantly reduces subvisible particles released from the lubricating layer into the liquid content of the syringe.
[0207] Table 1
[0208]
[0209] Table 2
[0210]
[0211] As shown in Table 2, sub-visible particle counts were significantly lower where the stage 2 power was high (eg 11W) rathe...
example 4
[0229] Example 4 - Moving Inlet in Phase 1 plus High Power Crosslink in Phase 2
[0230] The purpose of this study was to evaluate the four processes with respect to the resulting plunger forces and particle counts.
[0231] Process 1 is a one-stage lubricious coating process with low power and static inlet. Process 2 is a one-stage lubricious coating process with high power and moving inlet, and Process 3 is a two-stage lubricious coating process in which low power is used and moving inlet is used in the first stage, followed by a medium-higher Post-crosslinking step of power (eg 10W). Process 4 is also a two-stage lubricious coating process in which a low power and moving inlet is used in the first stage, followed by a high power (eg 50W) post-crosslinking step in the second stage. In a second stage, the closure (if applicable eg a syringe cap) is removed and the coated surface is crosslinked using a plasma with air at atmospheric pressure at a second electrical power leve...
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