Why should we pay attention to the selection of EPDM sealing strips?
1. Material differences lead to significant performance differences
Taking the case of Ms. Wang, a homeowner in Beijing, as an example, PVC sealing strips have a lifespan that is more than 50% shorter than EPDM, resulting in paying nearly a thousand yuan more in heating fees each year
2. Market chaos is widespread
According to a survey conducted by the Guangdong Doors and Windows Association, 72% of household sealing strips have material misjudgments in their selection
3. The invisible function has a significant impact
As the "invisible guardian" of doors, windows, cars, and home appliances, sealing strips are directly related to core performance such as sound insulation, thermal insulation, and waterproofing
4. Significant long-term economic differences
High quality EPDM sealing strips have a lifespan of 15-20 years, while inferior products only last 2-3 years, resulting in a long-term cost difference of over 10 times
Which specification of EPDM sealing strip should be selected for different scenarios
How to choose the specifications for door and window sealing strips?
1. Suitable structure for casement windows
D-type or P-type hollow structures should be selected, which can form an air buffer layer during compression and increase sound insulation by 30% compared to solid rubber strips
2. Suitable structure for sliding windows
It needs to be equipped with a U-shaped winged structure, and the side wings can effectively fill the sliding gap. The water tightness can reach 0.3MPa (equivalent to a pressure of 3 meters deep)
3. Basis for specification selection
According to the size of the window frame slot, the cross-sectional size of the rubber strip should be 15% -20% larger than the slot to ensure compression
What are the special requirements for sealing strips in different parts of cars?
1. Door frame sealing strip
Plush treatment is required to reduce friction noise and improve the smoothness of door opening and closing
2. Engine compartment sealing strip
Materials with good oil resistance must be selected through oil resistance testing (volume change rate ≤ 15% after soaking in IRM903 oil for 70 hours)
3. Sunroof sealing strip
Emphasize weather resistance (QUV aging test for 3000 hours without cracks)
4. Sealing strip for battery pack
Adopting an irregular composite structure, the inner layer is made of EPDM to ensure elasticity, and the outer layer is made of TPV to enhance wear resistance, with good waterproofing
What are the special requirements for household appliance sealing strips?
1. Refrigerator door seal
Magnetic composite layer is required to ensure stable adsorption force below 0 ℃
2. Sealing strip for air conditioning cabinet unit
Require low VOC emissions (≤ 10 μ g/m ³)
3. Sealing strip for water dispenser/water purifier
Seals that come into contact with drinking water must comply with the "Specification for Sanitary and Safety Evaluation of Drinking Water"
4. Microwave oven sealing strip
Must meet both high temperature resistance (above 120 ℃) and aging resistance requirements simultaneously