Rubber strip is also called sealing strip, leather strip and rubber strip. According to different raw materials, it can be divided into natural rubber sealing strip, EPDM sealing strip, PVC rubber plastic sealing strip and silica gel products. Now I will introduce the performance and price of several sealing strips.

天然橡膠密封條使用量比較少，比較高。天然橡膠與多數(shù)合成橡膠相比，具有良好的綜合力學性能，耐寒性，較高的回彈性及耐磨性。天然橡膠不耐礦物油，但在植物油和醇類中較穩(wěn)定。在以正丁醇與精制蓖麻油混合液體組成的制動液的液壓制動系統(tǒng)中作為密封件的膠碗，膠圈均用天然橡膠制造，一般密封膠也常用天然橡膠制造

The use of natural rubber sealing strip is relatively small and the price is relatively high. Compared with most synthetic rubber, natural rubber has good comprehensive mechanical properties, cold resistance, high resilience and wear resistance. Natural rubber is not resistant to mineral oil, but stable in vegetable oil and alcohols. In the hydraulic brake system of the brake fluid composed of n-butanol and refined castor oil, the rubber bowl is used as the seal, and the rubber ring is made of natural rubber, and the general sealant is also made of natural rubber

三元乙丙密封條彈性較好，表面光滑，使用壽命是14年左右，成本高，高質量的三元乙丙密封條可以回收，對于企業(yè)而言，也可以算的上是一種降低成本的方式。三元乙丙的密封條耐高低溫，耐候性好，耐老化，耐腐蝕。導電阻燃絕緣。

EPDM sealing strip has good elasticity, smooth surface, service life of about 14 years, high cost, high quality EPDM sealing strip can be recycled, for enterprises, it is also a way to reduce costs. EPDM sealing strip is resistant to high and low temperature, good weather resistance, aging resistance and corrosion resistance. Conductive and flame retardant insulation.

三元乙丙橡膠的主鏈是不含雙鍵的完全飽和的直鏈型結構，其側鏈上有二烯涇，這樣就可用硫磺硫化。三元乙丙橡膠具有優(yōu)良的耐老化性，耐臭氧性，耐候性，耐熱性(可在120℃環(huán)境中長期使用)，耐化學性(如醇，酸，強堿，氧化劑)，但不耐脂肪族和芳香族類溶劑侵蝕。三元乙丙橡膠在橡膠中密度是的有高填充的特性，但缺乏自粘性和互粘性。此外，三元乙丙橡膠有突出的耐蒸汽性能，可制作耐蒸汽膜片等密封制品。三元乙丙橡膠已廣泛用于洗衣機，電視機中的配件和門窗密封制品，或多種復合體剖面的膠條生產中。

The main chain of EPDM is a fully saturated straight chain structure without double bond, and its side chain has diene Jing, so it can be sulfurized with sulfur. EPDM has excellent aging resistance, ozone resistance, weather resistance, heat resistance (can be used in 120 ℃ environment for a long time), chemical resistance (such as alcohol, acid, strong base, oxidant), but it is not resistant to the attack of aliphatic and aromatic solvents. EPDM has the lowest density and high filling property in rubber, but it lacks self adhesion and mutual adhesion. In addition, EPDM has outstanding steam resistance, which can be used to make steam resistant diaphragm and other sealing products. EPDM rubber has been widely used in washing machine, TV accessories, door and window sealing products, or in the production of rubber strips with multiple composite profiles.

PVC橡塑密封條彈性不佳，不能回收，使用年限比較短，一般是1--7年左右，不環(huán)保。成本低。不耐熱。

PVC rubber and plastic sealing strip has poor elasticity and can not be recycled. Its service life is relatively short, generally about 1-7 years, not environmentally friendly. Low cost. Heat resistance.

硅膠制品的是45---60元/公斤。硅橡膠具有突出的耐高低溫，耐臭氧及耐天候老化性能，在-70～260℃的工作溫度范圍內能保持其特有的使用彈性及耐臭氧，耐天候等優(yōu)點，適宜制作熱機構中所需的密封墊，如強光源燈罩密封襯圈，閥墊等。由于硅橡膠不耐油，機械強度低，昂貴，因此不宜制作耐油密封制品。

The price of silica gel products is 45-60 yuan / kg. Silicone rubber has outstanding high and low temperature resistance, ozone resistance and weather aging resistance. It can maintain its unique use elasticity, ozone resistance, weather resistance and other advantages within the working temperature range of - 70 ~ 260 ℃, and is suitable for making the sealing gasket needed in the thermal mechanism, such as the sealing ring of the strong light source lampshade, valve gasket, etc. Because silicone rubber is not oil-resistant, low mechanical strength and expensive, it is not suitable to make oil-resistant sealing products.

由此可見密封條的使用還含有很多的學問呢，不同材料的密封條的性能差異如此之大。在這里要提醒大家一下在先擇密封條的時候一定要考慮周圍的環(huán)境，根據(jù)上面的描述去選擇你需要的密封條。

It can be seen that there is a lot of knowledge in the use of sealing strips. The performance of sealing strips made of different materials is so different. Here I would like to remind you to consider the surrounding environment when selecting the sealing strip first, and choose the sealing strip you need according to the above description.