Resists humidity, moisture, natural elements
可抵抗湿度、潮湿、自然环境。
? Eliminates solvent emissions and long set-up times
? 无须溶剂喷射和较长的安装时间。
Disadvantages
缺点
Not available on round cross sections
没有圆形截面。
Not recommended for applications where solvent resistance is essential
对于耐溶剂性很必要的情况下不适用。
Not recommended for applications where resistance to excessive abuse due to moving parts or traffic is required
对于由于需要移动部件或运输而耐过度机械损失的情况下不适用。
EMI PRODUCTS - CASE STUDIES
电磁干扰产品－个案研究
Co-Extruded Gasket Stops Corrosion on Outdoor Telecom Enclosure
Co挤出垫片可阻止室外电信封装的腐蚀
.....A pole-mounted, aluminum telecom enclosure presented serious challenges for controlling EMI and keeping out the elements. The enclosure needed a conductive gasket capable of at least 80 dB shielding effectiveness in the high megahertz to low gigahertz range. A separate environmental seal was needed to protect against rain and moisture.
.....柱上铝制电信封装在控制电磁干扰和排除元件方面面临着挑战。封装需要一种在高兆赫到千兆赫范围内至少有80 dB屏蔽效率的导电垫片。还需要单独的环境密封以保护封装免受雨水和潮湿影响。
.....An early gasketing approach used a non-conductive hollow silicone strip with a pure-silver-filled silicone extruded onto its surface. But, in contact with the aluminum housing, and exposed to coastal salt fog and driving rain, severe corrosion of the housing flanges occurred.
.....较早的垫片方法采用一种不导电空心硅树脂条，在其表面挤出纯银填充的硅树脂。但是，在和铝制壳体接触时，以及暴露于沿海盐雾和大风雨的情况下，壳体法兰会遭受严重的侵蚀。
.....To meet these shielding and environmental requirements, XXXX produced a co-extruded EMI gasket. This was a CHOSEAL? conductive elastomer extruded in parallel with a non-conductive elastomer. The gasket’s conductive side is a nickel-platedgraphite filled silicone. The filler particles can bite through thin surface oxides and chemical treatments on aluminum housings. The vulcanized seam between the elastomers provides long-term integrity.
.....为了满足这些屏蔽和环境要求，XXXX 生产了一种co挤出电磁干扰垫片。这就是CHOSEAL?导电弹性体，它与一种非导电弹性体同时挤出。垫片的导电侧为镀镍石墨填充的硅树脂。填充颗粒能够穿透铝制壳体上的薄薄的表面氧化物和化学处理。弹性体之间的硫化接缝可提供长期的完整性。
.....The conductive side of this gasket was positioned inboard, with the non-conductive silicone outboard. The nonconductive side of the cross section was designed with an additional sealing tab to fill an existing sump area in the seam where rain and moisture collected.
.....垫片的导电侧位于内侧，不导电硅树脂位于外侧。横截面的不导电侧设计有一个附加的密封片，以便对接缝中集雨水和潮湿的现有贮槽区域进行填充。
华译网上海翻译公司曾经翻译过大量有关电磁干扰产品资料文件，Beijing Chinese Subtitling Translation Service Agency has translated many technical documents about EMI Products.
.....The co-extruded gasket allowed use of the existing flange design. It avoided the cost for separate shielding and weather sealing gaskets, and converting to a double-groove design. This is an example of how XXXX co-extrusions offer performance and logistical advantages at attractive prices.
.....co挤出垫片允许使用现有的法兰设计。它避免了采用单独屏蔽和气候密封垫片并转变为双槽设计的费用。这是XXXX co挤出制品如何以有吸引力的价格发挥性能和物流优势的实例。
For more information, request XXXX
关于更为详细的信息资料，请向XXXX 索取。
Co-extruded Elastomer Strips.
Co挤出弹性体条。
Table 17: Non-Conductive Extruded Elastomer Specifications*
表17：不导电挤出弹性体规范*
Test Procedure
(Type of Test)
试验程序
(试验类型)
CHO-SEAL CHO-SEAL CHO-SEAL
2532 2542 2557
Conductive Match
导电匹配 - 1215/1273 1287/1298/L6303 S6305/1285/1350/
1356/1285/1215/
1273/6315
Elastomer Binder
弹性体粘合剂 - Silicone
硅酮 Fluoro-Silicone
氟代－硅树脂 Silicone
硅酮
Color 颜色 - Black
黑色 Light Blue
淡蓝 Light Blue
淡蓝
Hardness, Shore A
硬度，肖氏硬度Shore A ASTM D2240 (Q/C) 60±5 70±5 65±10
Specific Gravity (±0.25)
比重(± 0.25) ASTM D792 (Q/C) 1.5 1.68 1.55
Tensile Strength, psi (MPa), min.
抗拉强度，psi (Mpa), 最小值 ASTM D412 (Q/C) 400 (2.76) 500 (3.45) 200 (1.38)
Elongation, % min.
延伸率，%, 最小值 ASTM D412 (Q/C) 130 65 100
Tear Strength, lb/in/ (kN/m), min.
撕裂强度，lb/in (kN/m), 最小值 ASTM D624 (Q/C) 35 (6.13) 30 (5.25) 35 (6.13)
*Materials used in the above chart are available to be used as Co-extrusions or bonded together with an EMI gasket.
*上表中所使用的材料可用于co挤出制品或与电磁干扰垫片相粘合。
Custom Co-Extruded Strips
定制Co挤出条
Dimensions shown in inches; 1 in. = 25.4 mm
尺寸单位为英寸，1英寸＝25.4毫米
Custom Co-Extruded Gaskets
定制co挤出垫片
Extruded in parallel, dual conductive/non-conductive gaskets provide optimum EMI shielding and corrosion protection in a single, cost-effective design. For performance and cost advantages of this approach, refer to page 36. To discuss your requirements, contact our Applications Engineering Department.
同时压出的双重导电/不导电垫片可在单个有成本效益的设计中提供最佳的电磁干扰屏蔽和防腐性能。关于这种方法的性能和成本优势，请参照第36页。如果需要针对您的要求进行讨论，请与应用工程部进行联系。 |
