For outdoor computer and monitor applications, we successfully upgraded the original front water-resistance rating from IP65 to IP66. Throughout this process, we carefully balanced production costs with optimized adaptability in the structural design. This article shares how to select appropriate sealing materials, implement robust structural designs, and simplify external openings to meet increasingly stringent outdoor reliability and waterproofing requirements.
How to Prevent Water and Moisture Ingress into Devices ?
1. Heterogeneous Leak-Proof Connections
By utilizing specialized Heterogeneous VHB (Very High Bond) shapes, designers can effectively leverage height differences at the seams. This approach eliminates waterproofing failures caused by production process tolerances. It also solves the low production yields and high costs typically associated with integrated, seamless VHB tape, while ensuring the components remain easy to rework and maintain.
2. Multilayer Adaptable Structures
Implementing multiple redundant structures allows designs to achieve both flexible installation methods and high-reliability standards. EPDM was chosen as the primary sealing material to meet strict outdoor environment isolation and tolerance requirements, specifically offering protection against water vapor, dust, and UV degradation.
3. Sealing Material Selection
Considering our customers' actual application scenarios and structural designs, we finalized EPDM as our core sealing material. Below is a comparative overview of how it performs against other common alternatives:
| Feature | SBR | EPDM | Viton™ |
| Temperature Range | -50°C to +100°C | -50°C to +150°C | -20°C to +200°C |
| Ozone & UV Resistance | Poor | Excellent | Excellent |
| Oil & Fuel Resistance | Poor | Poor | Excellent |
| Water & Steam Resistance | Good | Excellent | Good to Excellent |
| Key Strengths | Highly cost-effective; excellent abrasion resistance and mechanical strength. | Outstanding weatherability; does not crack under prolonged sunlight or outdoor exposure. | Premium chemical resistance; maintains sealing integrity at extreme temperatures and in harsh fluids. |
| Key Weaknesses | Degrades quickly in sunlight, ozone, or when exposed to petroleum-based fluids. | Swells and fails rapidly when exposed to petroleum-based oils, fuels, or concentrated acids. | Higher cost; relatively poor low-temperature flexibility compared to EPDM. |
| Typical Applications | Tires, shoe soles, general-purpose industrial belts, and dampeners. | Outdoor weather stripping, cooling system hoses, roofing membranes. | Aerospace seals, fuel system O-rings, heavy industrial fluid handling. |
4. Reducing the Number of Enclosure Openings
By introducing a Touch OSD (On-Screen Display) function, On-Screen Display options can be controlled entirely via software. Eliminating traditional, physical push-buttons significantly reduces the risk of water ingress through chassis holes while simultaneously lowering manufacturing costs.
※. Traditional On-Screen Display (OSD) : Opening
From structural optimization to material selection, TES utilizes its mature IP66 waterproof solutions to help customers tackle harsh outdoor conditions. This effectively reduces water ingress failure rates in touch monitors and panel PCs, minimizing O&M costs and downtime losses. Customers can either choose custom waterproof services tailored to their specific needs, or directly opt for the APM-100 10.1-inch semi-outdoor open-frame PCAP touch monitor to quickly adapt to project requirements and efficiently deploy equipment.
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