PEEK polymer | Custom Compounds Granules

In difficult fields, the famous SWER is recognized for being highly resistant to chemicals among strong indicators.

Even though PEK is such a non-conducting material, it can still be damaged by acids with high strength such as sulfur and nitro.

If we consider the specifics, passivation is done with nitric acid at a strength of 20% - 30%, since its acidity greatly affects the process.

• With glass fiber added to PEEK, this material shows a stronger structure than regular PEEK. When it is neat, PEEK delivers 90-100MPa tensile strength, but it goes as high as 140-160MPa after blending with 30 percent glass fiber. If 40% of the glass fiber is used, the figure could increase. Even though the change in this parameter falls below 40% for glass fiber content, it keeps providing significant benefits in the field of composite materials engineering.
• Besides polyether ether ketone, glass fibers—especially—are susceptible to both market changes and changes in prices of the materials used. There are no exact data, but PEEK material strengthened with glass costs far less than PEEK material reinforced with carbon fiber. Prices for PEEK products range from 0.1 dollars per gram to $10 and these differences depend on the brand category and quality.
• HR-PEEK made of polymer with added glass or carbon fiber, shaped directly by molding, appears to have all the needed features for its use in orthopedics. With the help of these processes, billets may be shaped into various forms suitable for industry.
• Usually, there are from 5% to 60% glass fibers in materials; for other requirements, other amounts may be picked. Aiming to increase the strength, efforts are put in when the glass fiber amount is less than 30%; however, for content higher than 30%, the main goal is to elevate the material’s modulus. The increase in strength and modulus continues to grow in a straight line with the addition of extra elements, while their weight holds less than 40%. This means that during more than 40% of the building time, strength continues to rise but the modulus also goes up.
• It was revealed by this test that the initial modulus of the PEEK stayed almost the same after 10-20% glass fibers were incorporated and it deformed. You can see that glass fibers make the PEEK composition stand strong and unbending when it is pulled.

• The empty PEEK (polyether ether ketone) shows good resistance after completing all the selected tests and the ISO-527 Standard. When the stress is in the 0~100MPa range, this material stretches by only 5% relative to its original size, so it stands out because of its toughness and durability. This evidence reveals that an unmelted PEEK is very tough and functions well when under stress.
• Similar to the other tests, the data in 23°C and 120°C reveals that PEEK with no reinforcing agents had very little drop in output. Even so, this material withstands 10 million repetitive load tests of up to 100MPa at 23 °C without getting worn out which shows it has high strength and excellent durability. The method used in line with ISO standards which applies stress from 10% to 100% of the highest target restraining force and oscillates the sample at 5Hz from side to side, permits the measurement of resistance to fatigue in materials after 1,000,000 cycles.

1. High specific strength: The specific strength of carbon fiber modified PEEK far exceeds that of aluminum alloy. Specifically, the tensile strength of ordinary aluminum alloys (such as 7075 series) is about 530 MPa, while the tensile strength of carbon fiber reinforced PEEK can reach 1500 MPa. or higher. This means that the specific strength of carbon fiber modified PEEK is at least three times that of aluminum alloy. By using carbon fibre, we have managed to increase how much weight composite materials can carry without sacrificing their lightness which matters most in aerospace, automotive and similar industries.
2. Wear resistance: Compared with unmodified PEEK, peek carbon fiber prepreg shows significantly improved wear resistance, and the wear resistance can be increased by more than 50%. The enhanced material helps the part survive much longer.
3. Corrosion resistance: PEEK itself is a high-performance engineering plastic known to have excellent chemical resistance. It is immune to most chemical substances, especially acids, bases and solvents. For example, according to literature reports, when 30% carbon fiber PEEK is contacted with concentrated sulfuric acid (98%) at room temperature, its mass loss is very small, and the annual loss rate may be less than 0.1%. This means that PEEK remains stable in extremely harsh chemical environments without significant degradation due to chemical corrosion.
4. Formula proportion and the purpose of its adjustment need to be identified.
   Usually, carbon fibre makes up 5% to 60% of composite materials and different parts require a different amount.
   Proportion within 30%: this is mainly used to increase the strength of the material. When the proportion of carbon fibre is increased within this range, the material’s strength is able to increase.
   Ratios greater than 30% need attention on improving the material’s tensile strength. Above 30% carbon fibre, the strength of the composite remains similar, while its stiffness increases and makes it suitable for tasks that depend on stiffness.
5. Adjusting the proportion leads to particular results.
   An increase in carbon fibre content to under 30% causes the material to be stronger and stiffer.
   While the mechanical strength does not improve much when the carbon content is more than 30%, the stiffness of the material will continue to increase. This is necessary when you need a part to have particular movement rather than great strength.