In terms of waterproof function, how does the door frame universal sealing hard strip prevent rainwater from penetrating into the door frame?
Publish Time: 2024-12-12
The door frame universal sealing hard strip plays a vital role in preventing rainwater from penetrating into the door frame, and its waterproof mechanism is a sophisticated system of multi-faceted synergy.First of all, from the perspective of material properties, the sealing hard strip is usually made of plastic materials with good water resistance and low water absorption, such as PVC or EPDM. The molecular structure of these materials can effectively resist the invasion of water molecules and reduce the decline in sealing performance caused by water absorption of the material. Its surface has been specially treated to have a certain degree of hydrophobicity, making it difficult for rainwater to adhere and penetrate when it contacts the sealing hard strip.In terms of structural design, the cross-sectional shape of the sealing hard strip is unique. Generally, multiple sealing lips are designed. When the door is closed, these sealing lips will fit tightly on the surface of the door frame and the door to form a barrier. For example, the outermost sealing lip is the first to contact the rainwater, and its special inclination angle and soft elasticity can guide the rainwater to slide down the lip edge without penetrating inward. The inner sealing lip further enhances the sealing effect. Even if a small amount of rainwater breaks through the first line of defense on the outside, it will be blocked by the inner lip and directed back to the outside.The close contact pressure between the sealing strip and the door frame and door is also a key factor. The appropriate hardness and elasticity enable the sealing strip to generate sufficient compression force after installation to ensure that there is no gap between the contact surface. This close fit can effectively prevent the penetration of rainwater under wind pressure or capillary action. In heavy rain weather, when rainwater tries to force its way into the door gap under the action of wind, the sealing strip, with its good elastic recovery ability, always maintains a close fit with the door frame and door, and will not have gaps due to external forces, thus successfully resisting the invasion of rainwater.In addition, some high-end door frame universal sealing hard strips may also add water-absorbing and expanding materials to the internal structure. When encountering a small amount of rainwater penetration, these water-absorbing and expanding materials will quickly absorb moisture and expand, further filling the possible tiny gaps, enhancing the sealing effect, and preventing further rainwater penetration. Through the waterproofness of the material, ingenious structural design and good contact sealing performance, the door frame universal sealing hard strip builds a solid waterproof defense line, ensuring the dryness and safety of the door frame under various weather conditions and providing reliable protection for the indoor environment.
