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The classification of engineering plastics: there are many types of engineer plastics. Recently, the frequent classification [url=http://www.burnabystorage.com/barbour.php]barbour sito ufficiale[/url] methods are based on production amount and [url=http://www.dearilievi.it]piumini moncler outlet[/url] application ranges. The classification of engineering plastics: there are many [url=http://www.rtnagel.com/louboutin.php]louboutin[/url] types of engineer plastics. Recently, the frequent classification methods are based on production amount and application ranges. It can be divided into engineer plastics and special project plastics:
Universal engineer plastics: PA, PC, POM, PPO and PBT/PET.
Special project plastics: fluorine plastics, PTFE rod, PPS, PEEK, PI, PAR [url=http://www.anepf.fr]doudoune moncler[/url] and Ekonol.
Besides, we can classify the engineering plastics [url=http://www.jeremyparendt.com/Barbour-Paris.php]barbour pas cher soldes[/url] as per chemical element, heat durability level, crystallization [url=http://www.thehygienerevolution.com/hollister.php]hollister france[/url] and finished manufacturing products.
Among lots of engineer plastics types, most of [url=http://www.tagverts.com/barbour.php]www.tagverts.com/barbour.php[/url] the main chain may contain elements like O, N and S etc. It illustrates that main chain and various polar groups formed by mixed elements would be the basic reason to offer sound feature for engineer plastics.
High-level mercury material would get softened when being heated. Therefore, every type of high mercury material should be with certain utility temperature range.
Universal engineering plastics' using temperature is commonly within 100 to 150 degrees. But for special engineering plastics, the [url=http://www.par5club.com/louboutin.php]louboutin pas cher[/url] temperature would be higher than 200 degrees or more. Seen from the structure, the temperature maintenance is connected with circle ring structure of macromolecular main chain, or the existence of high electronegativity atoms like fluorine.
The feature of engineering plastics: the attention on engineer plastics may result from abundant raw material, superb feature and low price. What's more, it owns the feature other metals and materials cannot provide.
1 Small density, light weight and high strength proportion. The related density of engineer plastics is around 1.0 to 2.0. It is one eighth of steel and one second of aluminum. The pooling tense (pooling strength/density) can reach 1700 to 4000 (for engineer plastics with reinforced glass fiber). The steel is 16000 and aluminum is only 400.
2 Stable chemical feature. Engineer plastics are with sound stability in common acid, alkali and organic agent. It is better than steel material.
3 Sound [url=http://www.skoda-witzke.de/woolrichoutlet.php]woolrich[/url] dielectric feature.
4 Superb anti-milling, friction reduction and automatic lubrication feature.
5 Sound vibration absorption, anti-collision, sound removal and exhaust prevention feature.
6 Compared with metal material, it is easy for manufacturing of shape forming with high production efficiency.
However, engineering [url=http://www.skoda-witzke.de/woolrichoutlet.php]woolrich outlet[/url] plastics also own the weakness. For [url=http://www.dearilievi.it]moncler outlet[/url] instance, the mechanical strength, hardness and heat transferring feature is not good compared with ceramic. Its water absorption amount is large. It is [url=http://www.davidhabchy.com]barbour outlet[/url] with easy photochemical feature and to creep. Therefore, engineering plastics can meet assisted cooperation with metal, ceramic and glass material to respectively make use of advantages. Here we recommend many reasonable applications of engineer plastics like ptfe film and teflon film.
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