2015.AM
3616A.com
 
 
流量统计:
 
 

Technical data for plastic bearings

PEEK Engineering plastics elucidation
    _www145.com澳门金沙PEEK Polyether etherketone can be used at very high temperatures (+260℃) and it shows an extraordinary mechanical strength, toughness, hardness, flexural strength, torsional strength, PEEK exhibits excellent chemical resistance, very good dielectric properties up to +260℃ and a very good resistance to all kinds of radiation. Lmportantl it is self-extinguishing according to UL 94.
Advantages :
·very high mechanical strength
·very high rigidity
·very high thermal stability
·very high dimensional stability
·very high radiation resistance
·very high hydrolysis resistance
·极高的抗伦琴射线及红外线的才能
·下抗水解才能(18大气压,280℃)

Disadvantages :
notched impact strength relatively low
· low resistance to acetone

Application :
Bearing shells, piston rings, valve seats, gears, seals, aviation, pump vanes, plug connectors, wafer carriers.

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
POM Engineering plastics elucidation
     POM Polyoxymethylene can be used in tem-peratures ranging from -60℃to +100℃. The high surface strength is only surpassed by a few materials. POM shows good sliding roperties and high resistance to wear and tear because of the high strength and smooth surface. There is a very low risk of stress cracks. POM (Copolymere) exhibits a high thermal stability and a high resistance to chemicals (high resistance to hydrolysis).
Advantages :
·high strength
·high rigidity
·high thermal stability
·good electrical insulation properties
·very good sliding properties
·high resistance to solvents
·very high resistance to stress cracks
·高抗张裂机能
·UV-resistant (only black)

Disadvantages :
·not resistant to high-concentrated acids
· difficult to glue and pain

Applications :
Bearings, gear wheels, parts for pumps, screws, ornamental mountings and fittings, parts for the textile industry.

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
PP Engineering plastics elucidation
     PP(Polypropylene)shows a high mechanical strength, tensile strength, but a low notched impact strength, PP resists stress cracking and it is easy to weld. At minus temperatures it can get brittle. The chemical and electrical properties are very good. The temperature ranges between +5℃and +100℃._2015.AM
Advantages :
·low density
·good heat resistance
·high tensile strength
· high surface strength
·high chemical resistance
·food safe
Disadvantages:
·low oxidation resistance
·low abrasion resistance
·HF-welding not possible
·difficult to varnish and glue
·not weather resistant
·粘接,油漆性一样平常
·易受天色前提限定
Applications :
Pumps, valves, seals, toys, bearings
— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
PTFE Engineering plastics elucidation
      _3616A.comPTFE(聚四氟乙烯)临时运用温度-200℃~+260℃,有很强的耐化学腐蚀性,对一切化学品皆耐侵蚀,摩擦系数低,具有优越的电绝缘性,并不受温度影响。
Advantages:
·尺寸稳固强度下
·一连工作温度-70℃到260℃
·外面摩擦系数为0.05-0.1,介电常数小
·抗老化,不燃浇.抗粘性优秀
·耐种种强酸.碱.盐和有机溶剂等化学品的侵蚀
·机器性好,不容易断裂,宜车加工,韧性强
·绝缘性,不导电,不泄电.可作高绝缘介质
·阻燃性,正在氛围中不熄灭.用正在高温中安全性下
Disadvantages:
·流动性差
·弗成焊接
·易熔融加工
— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
HDPE Engineering plastics elucidation
    _澳门金沙娱场3777.com

HDPE (High Density Polyethylene) There two Polyolefins offer resistance to almost all acids and bases, detergents and hot water. PE has good insulation properties and is easy to weld. The operating temperature of HDPE is from -50℃ to +90℃.

Advantages :
· light weight
· high toughness (also at low remperature)
· high elongation
·very good electrical and dielectric properties
· very low water absorption
·low steam permeability
· high chemical resistance
·good protection against stress cracking
· food safe

Disadvantages :
· soft surface (low tensile strength)
· HF welding not recommended
· difficult to varnish and glue
· not weather resistant

Applications:
Drinking water soil pipe way, hot water piping, conveyance container, pump with valve a department, cure to use the tool parts

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —

■PE-UHMW
      It’s muy buenas propiedades de deslizamiento than HDPE.

— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
PVDF Engineering plastics elucidation
     PVDF(Polyvinylidene fluoride) shows a higher tensile strength, pressure resistance and dimensional stability than the related PTFE, but friction and insulation properties are lower. PVDF has a high mechanical strength and toughness at lower temperature and it’s self-extinguishing. The temperature ranges from -60℃~+150℃.
Advantages :
· high tensile strength
· high mechanical strength
· high chemical resistance
· low water absorption
· good friction and wear and tear values
· self-extinguishing
· high UV-resistance
Disadvantages :
· toxic fumes when burned
· can not be solvent cemented

3616A.com

澳门金沙娱场3777.com

在线攀谈

www145.com澳门金沙