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选择防水防尘透气产品时,先确定应用、设备或外壳所需的防护等级非常关键。

由于NEMA需要进行IP中不包含的额外测试,因此IP防护等级无法“转换”为NEMA等级。但是,NEMA防护等级可满足或超出特定IP代码的要求。

Materials Technology: IP Ratings — Ingress Protection Classification

This document explains the format and classification of Ingress Protection (IP) ratings, according to the IEC 60529 standards.

Materials Technology: UL 94 Standard for Flammability Testing

This document explains the Underwriters Laboratory standard for testing the flammability properties of plastic materials used for parts in devices and appliances.

Materials Technology: Water Entry Pressure Testing

Description of standard test used to measure a membrane's ability to stop aqueous flow, and diagram of the apparatus used for water entry pressure testing.

Materials Technology: Gurley Airflow Testing

Description of standard test used to measure airflow of low flowing media, and diagram of the apparatus used for Gurley airflow testing.

Materials Technology: Venting With Hydrophobic vs. Oleophobic Membranes

The key to choosing the appropriate membrane technology for a given application is understanding the environmental conditions and the surface tension of the fluids that the vent will encounter.

Materials Technology: Resistance Testing

Description of standard test used to measure resistance of high flowing media, and diagram of the apparatus used for resistance testing.

Materials Technology: Bond Strength Testing

Description of standard test used to measure the force required to separate the layers of a laminate, with diagrams of possible outcomes when water entry pressure has been exceeded.

Materials Technology: Oil Repellency

Description of GORE™ Oleophobic Membranes, oil repellancy testing, oil ratings, and surface tensions of typical fluids.

Materials Technology: Sealing GORE™ Membranes to Plastic Parts

A variety of methods can be used to seal GORE™ Membranes to plastic parts. This document describes two common methods: heat sealing, and ultrasonic welding.