Stanley Steel Entry Doors Magnetic Weatherstripping
The actual key of doors and Windows lies in sealing, the sealing of good and bad seal plays an important role. Use of sealing material on the market in general is on modification of PVC, its key role in the soft PVC is its inside the stand or fall of plasticizer, involvement with all kinds of...
The actual key of doors and Windows lies in sealing, the sealing of good and bad seal plays an important role. Use of sealing material on the market in general is on modification of PVC, its key role in the soft PVC is its inside the stand or fall of plasticizer, involvement with all kinds of petrochemical products price rising, seals and other rubber products prices are also rising.
Some irresponsible manufacturers only see short-term interests, started from the raw materials of unfair competition (so-called cut corners, shoddy, with waste engine oil, oil refinery remaining YouDeZi instead of high quality plasticizer etc.), for the vast number of consumers has brought a lot of hidden dangers. In the process of door making, the input of sealing strip is very small, but its function is not negligible. The quality identification method of door and window sealing strip includes the following:
1. Surface infiltration phenomenon occurs, and the waste oil is not soluble with PVC. The surface of the sealing strip is easily greasy, and yellow marks are stained on the surface of the profile. Not even environmental protection has a lot of volatile matter, polluted air.
2. When those so-called plasticizer volatilization or leakage sealing strip will lose its original softness, become very hard, and soon aging contraction, this part of the doors and Windows closed in large aperture, got worse in sealing (water leakage, leakage of dust), in particular, the steel lining plastic door window surface will soon be corrosion, there are a lot of users are often found in the rainy season from the window inside layering parts many red liquid are dirty, the Windows and doors premature leaking steel lining corroded, doors and Windows can greatly reduce the life of a.
In the actual production process, the input proportion of the seal strip is small, but its function cannot be ignored. So you don't have to choose the counterfeit products to reduce the cost, the identification method is very simple,
One, use nose to smell whether have peculiar smell, normal PVC material can have a little son the flavour of alcohol, almost small smell.
2. Place the seal on the profile as tightly as possible, and place it at high temperature for a period of time (on the roof or in sunny places). See whether the contact surface of the profile and seal strip is stained and discoloured, and whether the dust on the surface of the sealing strip is yellow (the oil is easy to absorb dirt), and whether it is contaminated with hands.
Three, some of the cheaper sealing strip fillers will be a lot, so the surface will not be very bright, those very cheap appearance is not bright.
Four, see the proportion, how many meters per kilogram. There are a lot of manufacturers, in the use of filler has great checkers, for larger output, a bit (province electricity) using talcum powder, coarse whiting do such things as filler, greatly increased the proportion of sealing products, (our users are more commonly kg is favorable, according to the length of the use of) that virtually increased the cost instead do more harm than good. Add a heavy calcium seal, stretch back and forth with your hands several times, and a small amount of white powder will appear on the surface.