症状： Symptoms of poor quality door and window seals :
1. 密封条 外表很简单呈现油脂，在型材外表也染上黄色的痕迹。 It shows the appearance of oil leakage on the surface. The waste engine oil base and PVC are incompatible. The appearance of the door and window seals is very simple , and the appearance of the profile is also stained with yellow traces. Not even environmentally friendly, there are many evaporating substances that pollute the air.
2. 密封条 就会失掉其原有的柔软性，变得很硬，并且很快老化缩短，这样门窗密闭的一部分呈现很大的缝隙，密闭性变得很差（漏水，漏尘）特别塑钢门窗里边的钢衬会很快被腐蚀，有许多用户常常发现在旱季从窗子里边的压条部位流出许多赤色的液体很脏，那就是门窗漏水钢衬过早被腐蚀，门窗的寿数会大大的下降。 When those so-called plasticizers evaporate or ooze out, the door and window sealing strips will lose their original softness, become very hard, and quickly age and shorten, so that the closed part of the door and window presents a large gap and tightness. It becomes very bad (water leakage, dust leakage) The steel lining inside the special plastic steel doors and windows will quickly corrode. Many users often find that many red liquids are dirty from the beading inside the window during the dry season. Premature corrosion will greatly reduce the life of doors and windows.
inferior 门窗 密封条 Door and window seals Identification method:
First, use your nose to smell if there is any odor. The normal PVC raw material will have a little odor, which is hardly smelled.
Second, wrap the sealing strip on the profile as tightly as possible, and place it under high temperature for a period of time (on the roof or in a sunny place). See if the contact surface of the profile with the sealing strip is stained and discolored, whether the dust on the surface of the sealing strip is yellow (oil is very easy to absorb), seep, or get dirty hands.
Third, some relatively cheap seal fillers will be many, so the appearance will not be very bright, those who are cheap and not shiny are not acceptable.
Fourth, depending on the specific gravity, how many meters can be produced per kilogram. There are many manufacturers who are clever in using fillers. In order to seek greater output value, (saving a bit of electricity) using talc, heavy calcium and the like as fillers, greatly increasing the proportion of sealing strip products, (our Users generally buy in kilograms and use them in length.) This actually increases the cost without hurting them. Participate in the seal of heavy calcium. If you stretch it back and forth by hand several times, the appearance will show a few white powder.
In the manufacturing process of doors and windows, the investment cost of the sealing strip accounts for a small proportion, but its effect cannot be ignored. Therefore, it is recommended that you do not choose those defective seals in order to reduce the cost.
Qinghe Hongao Sealing Parts Co., Ltd. is an enterprise with self-produced and self-sale, integrating production, processing, import and export trade. The company is a professional manufacturer of EPDM seals, door and window seals, silicone seals, rubber foam strips, foam seals, rubber seals. The factory covers an area of 5,600 square meters, with a construction area of 1,800 square meters. It has 12 million yuan in fixed assets. The company has more than 125 cadres and employees, including 13 senior engineering and technical personnel. Our company applies modern technology management. market. We always adhere to the principle of "practical and innovative, united and enterprising", and constantly develop and develop.