Selection of sealing strip for wind proof, waterproof and leakage proof of curtain wall doors and wi
The sealing strip of doors and windows is one of the important factors affecting the quality of doors and windows, which needs to have important functions of waterproof, sealing and energy saving. It has the functions of sound insulation, dust prevention, antifreeze and heat preservation, and also has strong tensile strength, good elasticity, and better temperature resistance and aging resistance. How to identify good quality in this mixed market environment? Today, the small woven curtain wall of yiminghua takes you to quickly choose a good window and window seal.
01 combustion method (rubber strips that can distinguish between hot rubber body and rubber type)
A. Rubber rubber strips are burnt to form ash and can not be pulled. The ash is white, and the silicone rubber will be put out after friction on the white paper; The ash is black, and the rubber of EPDM or neoprene is black after friction on white paper; The ash is black, and the natural rubber is used to touch the sticky hand at the extinguishment.
B. After burning, thermoplastic elastic rubber strips can be pulled into filaments at the extinguishment, among which EVA (ethylene vinyl acetate copolymer) has obvious vinegar taste. PE (polyethylene), PP (polybingene) have obvious candle burning flavor, sustainable combustion, and with melting and falling. PVC (PVC) tape has the characteristics of flameout and with black smoke and irritating smell.
C. TPV thermoplastic vulcanized rubber: surface Matt, melt drawing phenomenon, floating on water surface or suspended state.
D. SEBS thermoplastic elastomer seal: the surface is Matt, there is the phenomenon of melting wire drawing, and it slowly sinks in the water.
02 tension measurement
In contrast, as a sealant strip material, it should have certain tensile strength, and the standard requirement is that the strength is ≥ 5MPa. The higher the glue content of the same material, the better the tensile force, generally speaking, the service life will be longer and the sealing effect will be better.
Smell with nose whether there is odor, normal PVC material has a little alcohol flavor, almost no smell.
04 high temperature test
Wrap the sealing strip tightly on the profile as much as possible, and place it for a period of time (on the roof or in a sunny place) at high temperature. See whether the contact surface of profile and sealing strip has stain and discoloration, whether the dust on the surface of sealing strip is yellow (it is easy to absorb soil) and whether it is contaminated with hands.
05 observe color
Some cheaper sealing strip fillers will be many, so the surface will not be very bright, those very cheap appearance is not bright is not desirable.
The sealing performance of doors and windows depends on the sealing strip. The performance and life of the sealing strip products mainly depend on the selection of materials. So when buying, we recommend buying high quality door and window sealant strip!