超高分子量聚乙烯耐磨抗沖擊伸縮臂滑塊

  UHMWPE高分子量(分子量通常只有2 ~ 30萬的HDPE)以其優秀的使用性能，屬于價格適中、性能良好的熱塑性工程塑料，它集中了各種塑料的優點，幾乎具有普通聚乙烯和其他工程塑料無法比擬的耐磨性、抗沖擊性、自潤滑性、耐腐蝕性、吸收沖擊能量、耐低溫、衛生、無毒、不易粘連、吸水性小、密度大等綜合性能。事實上，沒有簡單的高分子材料具有如此多的優異性能。

超高分子量聚乙烯板突出優異特性：

1、耐磨性高居各類純塑料，而且隨分子量的增大而提高;UHMWPE與鋼、銅配對時容易產生粘著磨損，對配偶件的磨損小。使用壽命高于鋼質，耐磨性是炭鋼及不銹鋼的3～7倍;

2、自潤滑性很好，滾動摩擦系數在塑料中較低，可以在無潤滑下以滑動或轉動的形式工作，其潤滑性比鋼和銅在有潤滑油的情況下還要好!

3、具有很強的吸收沖擊能和摩擦消音的性能，有摩擦噪聲小的優點;

4、沖擊強度列塑料，是現有塑料品種中較耐沖擊的一種，常溫沖擊強度可與聚碳酸酯PC媲美，而低溫沖擊強度甚至比聚碳酸酯PC還要好;其沖擊強度是ABS的8倍、PA66的10倍、POM的22倍、PBT的25倍!

5、耐疲勞性很好，耐疲勞強度大于50萬次;

6、分子量較大，但不飽和鍵很少，因此具有優良的耐化學腐蝕性，能耐各類腐蝕性介質，比如：酸、堿、鹽，也能耐各類有機溶劑;

7、耐環境應力開裂的性能很好，是普通乙烯的200倍，抗應力開裂時間高達4000小時;而且耐高溫蠕變性也非常好;UHMWPE的耐輻射性亦很好;

8、超耐熱性不高，熱變形溫度HD

9、電氣性能良好，較佳的電絕緣性和抗靜電性，體積電阻率>1015Ω.cm，介電強度為90kV/mm，介電常數2.3;

10、表面無吸附力，對任何材料都沒有粘結性，具有較低的吸水率(<0.01%);

11、具有良好的抗高能輻射性;

12、無毒、無味、無滲出物;

13、耐老化優異的抗老化性能，在自然日照條件下，超高分子量聚乙烯的老化壽命為50年;

14、具有優異的機械加工性能。

UHMWPE with high molecular weight (HDPE with molecular weight usually only 20 ~ 300000) is a thermoplastic engineering plastic with moderate price and good performance because of its excellent performance. It integrates the advantages of various plastics and has almost the incomparable abrasion resistance, impact resistance, self lubrication, corrosion resistance, impact energy absorption, low temperature resistance, sanitation, non-toxic, not easy to adhere, low water absorption High density and other comprehensive properties. In fact, no simple polymer material has so many excellent properties.

Ultra high molecular weight polyethylene sheet highlights excellent characteristics:
1. The wear resistance is higher than that of all kinds of pure plastics, and increases with the increase of molecular weight; When UHMWPE is paired with steel and copper, it is easy to produce adhesive wear, and the wear of mating parts is small. The service life is higher than that of steel, and the wear resistance is 3 ~ 7 times that of carbon steel and stainless steel;
2. The self-lubricating property is very good, and the rolling friction coefficient is low in plastic. It can work in the form of sliding or rotation without lubrication. Its lubricity is better than that of steel and copper with lubricating oil!
3. It has strong absorption of impact energy and friction silencing performance, and has the advantage of low friction noise;
4. Impact strength is one of the most impact resistant plastics in the existing plastics. The impact strength at room temperature is comparable to that of polycarbonate PC, and the impact strength at low temperature is even better than that of polycarbonate PC; Its impact strength is 8 times that of ABS, 10 times that of PA66, 22 times that of POM and 25 times that of PBT!
5. The fatigue resistance is very good, and the fatigue strength is more than 500000 times;
6. The molecular weight is large, but there are few unsaturated bonds, so it has excellent chemical corrosion resistance and can withstand all kinds of corrosive media, such as acid, alkali, salt, and all kinds of organic solvents;
7. The environmental stress cracking resistance is very good, 200 times that of ordinary ethylene, and the stress cracking resistance time is up to 4000 hours; And high temperature creep resistance is also very good; UHMWPE also has good radiation resistance;
8. Super heat resistance is not high, thermal deformation temperature HD
9. Good electrical performance, better electrical insulation and antistatic, volume resistivity >1015 Ω.Cm, dielectric strength of 90kv/mm, dielectric constant of 2.3;
10. There is no adsorption on the surface, and it has no adhesion to any material, with low water absorption (<0.01%);
11. It has good resistance to high-energy radiation;
12. Non toxic, tasteless, and free of exudates;
13. Excellent aging resistance. The aging life of UHMWPE is 50 years under natural sunshine;
14. It has excellent machinability.