How to distinguish between true and false seals

As the prices of various petrochemical products continue to rise, some irresponsible manufacturers have started unfair competition from raw materials (so-called cutting corners, shoddy goods).

Window> The actual key of doors and windows lies in sealing, and sealing seals play a decisive role. The sealing material used in the market is generally modified by PVC. The key role in soft PVC is nothing more than its addition. The quality of plasticizers is currently relatively stable plasticizers such as dioctyl phthalate and dibutyl phthalate, but the market price is high, and some unscrupulous traders use some other inexpensive alternatives (waste oil, refinery The remaining oil base, etc., has brought a lot of hidden dangers to consumers.

Its product symptoms:

1. The appearance of surface oil-exuding analysis appears. Those waste engine oils are not soluble in PVC and the surface of the sealing strip is prone to grease, and the surfaces of the profiles are also stained with yellow marks. Even without environmental protection there are many volatile substances that pollute the air.

2. When those so-called plasticizers volatilize or ooze out, the sealing strip loses its original softness, becomes very hard, and quickly ages and shrinks, so that a large gap appears in the closed part of the door and window, and the airtightness changes. Very poor (leakage, dust leakage), especially in steel doors and windows inside the steel liner will be quickly corroded, there are many users often find that in the rainy season from the window inside the bead parts of the lot of red liquid is dirty, that is, leaking steel doors and windows over Corrosion early, the life of doors and windows will be greatly reduced.

In the production process, the investment in sealing strips is small, but its role can not be ignored. Therefore, everyone should not use those counterfeit products in order to reduce the cost. The method of identification is simple.

First, smell with the nose if there is odor, normal PVC material will have a little son of alcohol taste, almost no smell can not smell.

Second, the seal as tightly wrapped around the profile, placed at high temperatures for a period of time (on the roof or sunny place). Look at the contact surface between the surface of the profile and the sealing strip for signs of discoloration. Whether the dust on the surface of the sealing strip is yellow (oil is easily absorbed by the soil) or if the oil is dirty, is it dirty?

Third, some of the cheaper seal fillers will be many, so the surface will not be very bright, those very cheap appearance is very bright and undesirable. Fourth, to see the proportion, how many meters per kilogram. There are many unscrupulous traders who are trying to use fillers. Some manufacturers use talcum powder, heavy calcium, and the like as fillers to increase the proportion of seal products. , this virtually increased the cost of doing more harm than good. Add a heavy calcium seal and you stretch it back and forth several times by hand. A small amount of white powder will appear on the surface.

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