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Low Coefficient of Friction Silicone Coatings

打针如何不疼?摩擦如何不涩?你需要的只是一层涂层

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发布时间 : 2018/12/18 | 文章来源 : NUSIL | 作者 : 易供应

打针如何不疼?摩擦如何不涩?你需要润滑性有机硅涂层

Low Coefficient of Friction Silicone Coatings

有机硅弹性体固有地具有高度的表面粘性和粘连倾向(由于化学亲和力而粘附于其自身)。
这些固有特征对于需要模制或挤出的硅树脂部件以最小摩擦移动或滑动的应用可能是有问题的

这可以是在其中有机硅是可能折叠和展开的情况下尤其有问题的或储存过程中卷轴一起。
为了解决这个问题,NuSil开发了两种涂层,旨在降低硅树脂部件表面的摩擦系数(CoF)。

虽然这两种涂层都降低了硅树脂的CoF,但它们的固化设计方式不同

通过提供热固化版本,MED-6670和一个房间温度硫化版,MED-6671,可以容纳多种应用

MED-6670是分散在二甲苯中的两部分加成固化有机硅涂料,MED-6671是分散在乙酸叔丁酯中的单组分缩合固化体系
一旦固化,这些涂层与硅氧烷弹性体基材化学键合并模拟其机械性能,抵抗磨损并消除通常与润滑剂如流体和油脂相关的迁移问题结果是耐用而柔韧的涂层,可抵抗移动,滑动和摩擦部件的磨损。

它通过光滑的表面处理实现了这一点,也导致摩擦系数至少降低50%当涂覆的硅氧烷样品与未涂覆的硅氧烷样品并排比较时

Silicone elastomers inherently have a high degree of surface tack and a
tendency for blocking (sticking to themselves by virtue of chemical affinity).
These inherent features may be problematic for applications requiring a
molded or extruded silicone part to move or slide with minimal friction. This can
be especially problematic in cases where the silicone is likely to fold and unfold
or spool together during storage.
To overcome this issue, NuSil has developed two coatings designed to reduce
the coefficient of friction (CoF) on the surface of silicone parts. While both of
these coatings reduce the CoF of silicone, they differ in how they are designed
to cure. By offering a heat cure version, the MED-6670, and a room
temperature vulcanizing version, the MED-6671, a multitude of applications
can be accommodated. MED-6670 is a two-part, addition cure silicone coating
dispersed in xylene and MED-6671 is a one part, condensation cure system
dispersed in Tert Butyl Acetate.
Once cured, these coatings chemically bond to the silicone elastomer
substrate and mimic the mechanical properties thereof, resisting abrasion and
eliminating the concern of migration commonly associated with lubricants such
as fluids and greases. The result is a durable yet flexible coating that resists
abrasion from moving, sliding and rubbing parts. It achieves this with a smooth
finish that also results in at least a 50% decrease in the coefficient of friction
when coated silicone samples vs. non-coated silicone samples are compared
side-by-side.
有机硅涂层1

大约水的稠度,两种涂层都可以通过浸渍施加,但建议喷涂。被涂覆的基材应无污染,不会抑制固化,并能够承受固化周期。

如果采用喷涂技术,建议从目标表面喷射2-4英寸,涂层基材均匀润湿但不能浸泡。

使用单个喷涂层可以实现理想的涂层厚度以实现最佳还原

Approximately the consistency of water, both coatings can be applied by
dipping, but spraying is recommended. The substrate being coated should be
free of contamination, not inhibit the cure, and be able to withstand the cure
cycle. If utilizing a spraying technique, it is recommended to spray 2-4 inches
from the target surface, with the coated substrate evenly wetted but not soak-
ing. Ideal coating thickness for optimal reduction can be achieved with a
single spray coat.
有机硅涂层2

Applications:
• Tubing (ID/OD)
• Balloons
• Valves
• Stoppers
• O-Rings
• Anywhere that you have
moving or sliding parts
Demonstrates adhesion to:
• Aluminum
• Titanium
• Stainless steel
• Graphite
• Common materials used in biomedical assemblies

生物医学组件中常用的材料低上面列出的摩擦系数硅树脂涂层是指定的非限制性材料,可考虑用于长期植入应用(> 29天)。

限量版涂料MED10-6670和MED10-6671也可提供,可考虑短期使用植入应用(29天或更短)或外部应用。
设备制造商责任确定设备的安全性和功效以及该设备中使用的材料。
The low coefficient of friction silicone coatings listed above are designated
unrestricted materials and may be considered for use in long term implant
applications (>29 days). Restricted versions of the coatings, MED10-6670 &
MED10-6671, are also available and may be considered for use in short-term
implant applications (29 days or less) or external applications. It is the
responsibility of the device manufacturer to determine the safety and efficacy
of the device and the materials used in that device.

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