Форум керамистов

Художественная керамика - форум сайта "КерамикАрт.Ру"

Вы не зашли.

#1 2018-04-25 13:15:52

rxz123123456x
Участник

Howard Wilson Jersey[

Thermoplastics and high density materials continue another year of growth as recent developments and innovative design changes allow these materials to offer even more benefits in all kinds of environments and applications. Thermoplastics found a place in mainstream business due to their ability to decrease the part count or weight of parts in a particular tool or appliance. Turns out that a new class of heavy plastics and high density compounds are entering the picture Rashard Higgins Jersey , ones that have a specific gravity varying between 1.8 to 10.

A Bit of History

To better understand how this could revolutionize the manufacturing process, let’s take a look at how engineered thermoplastics are made. After a base resin has been chosen, its electrical, mechanical and physical properties are altered and manipulated to achieve desired state. Fillers and replacements such as rubber tougheners (for flexibility), carbon-black fillers (for electrical conductivity) and glass fiber (for strength) are carefully chosen and added to finally create a material that can work wonders in making the manufacturing process faster Trevon Coley Jersey , smoother and cheaper.

How are High-Specific-Gravity Compounds Created?

High-specific-gravity compounds are created by combining adding mineral or metallic fillers in thermoplastics. Base resins commonly used in this care are crystalline thermoplastics because of their flow properties. Common examples include polyesters, polypropylene, polyurethane and polyamides. Surface chemistry of fillers and particle size distribution is also important to ensure optimal processability.

The Journey from Light to Heavy

High-specific-gravity compounds can be classified into three different weight classes. Lightweight high-specific-gravity compounds have a specific gravity which varies between 1.8 to 4. These heavy plastics are commonly used in medical devices and to replace aluminium, clay or glass. Some of these compounds are used to add strength while others may be used to improve toughness. These compounds can be pigmented from brighter to darker tones.

Middleweight high-specific-gravity compounds have a specific gravity that varies between 4 to 7. These materials are usually designed to become magnetic and they fall in the same class as die-cast zinc. Many safety-restraint components used in automobiles are made using these high density materials and these parts can be colored in darker hues.

Finally, heavyweight high-specific-gravity compounds have a specific gravity that varies between 7 and 10. They offer solutions similar to lead Randall Telfer Jersey , stainless steel and bronze and are a fantastic lead replacement for shielding x-rays in medical applications. Training rounds are also made using these compounds to minimize the use of lead while allowing the material to withstand muzzle pressure and still manage to disintegrate upon impact. Another application of heavyweight high-specific-gravity compounds can be seen in automobile steering columns.

Why is this Important?

What makes these high gravity compounds so special is that they not only manage to consolidate parts and custom-create properties in order to decrease costs, but also present the ability to dialin specific part weights across the density range, which even manages to touch lead and its alloys. To make matters even more interesting, these engineered thermoplastics also come with special abilities such as magnetic properties, noise reduction Seth DeValve Jersey , frangibility, x-ray opacity and x-ray shielding. High-specific-gravity compounds are injection moldable in metal replacement solutions, which also eliminates the need for assembly operations and secondary machining, further reducing costs across the manufacturing channel.
HONG Kong movie star Jackie Chan said he feels shame for his son, who has been indicted on a drug charge and could be jailed for up to 3 years.


The remarks JC Tretter Jersey , reported yesterday by Xinhua news agency, came two days after authorities announced the indictment against Jaycee Chan, 32, who is charged with sheltering others to use drugs.


The scandal has been embarrassing for the elder Chan, who was named by China as an anti-drug ambassador in 2009.


Chan Kevin Zeitler Jersey , who sits on the Chinese People’s Political Consultative Conference, said he didn’t use his connections to interfere with the case and that he hopes his singer-actor son will become an anti-drug ambassador when he is released. “I hope that in the future, he could become an anti-drug spokesman and tell his experiences to young people,” Jackie Chan said.


Beijing police detained the younger Chan at his Beijing apartment in August along with Taiwan movie star Ko Kai.


Police said both men tested positive for marijuana and admitted using the drug, and that 100 grams of it were seized.


Ko Zane Gonzalez Jersey , whose real name is Ko Chen-tung, was released after a 14-day detention for the drug use, but Chan — who has been held since August — faces the more serious criminal charge.


State broadcaster CCTV in August aired a video of the raid on Chan’s apartment, in which he was shown identifying marijuana in his possession. Ko testified on camera that he had used drugs at Chan’s home.


CCTV also said Chan told police that he has been using drugs for 8 years.


In June, President Xi Jinping said illegal drugs should be wiped out and that offenders should be severely punished.


The crackdown snared more than 7 Howard Wilson Jersey ,800 people in Beijing alone, according to police.

Shorter daylight hours in the UK winter months can have an impact on a variety of human activities. If there?s one thing that people like to avoid, it?s to be inconvenienced. The absence of natural light once meant that actions were delayed or even cancelled. Industrial, agricultural and construction matters were all affected, as were leisure activities such as sports.
.

Неактивен

 

Board footer

Powered by PunBB
© Copyright 2002–2005 Rickard Andersson

Реклама:

Rambler's Top100