Limitations ◾Poor impact resistance at low temperature ◾Difficult to paint or bond with adhesives ◾Molded surface is not smooth with glass reinforcement
Overview Polypropylenes offer a good balance of properties and cost unachieved by most thermoplastics.
Polypropylene offers ease of processing with excellent chemical resistance and good mechanical properties.
Glass fiber-reinforced polypropylene has improved dimensional stability, resistance to warpage, rigidity and strength. Heat deflection temperature at 264 psi is increased up to 300 °F (150 °C) for 40% glass fiber reinforced polypropylene. Polypropylenes coefficient of thermal expansion is cut in half with 40% glass reinforcement.
Glass fiber reinforced polypropylene, when utilizing a chemical coupling agent, has significantly improved tensile and flexural strengths over regular glass reinforced polypropylene.
Polypropylene with 30% chemically-coupled glass reinforcement has a 180% improvement in tensile strength over the non-reinforced polypropylene and a 50% improvement over conventional glass-reinforced grades.
Overall, chemically-coupled polypropylene improves strength characteristics without altering the moduli, heat resistance, electrical properties, or hardness.
Talc-filled polypropylenes have improved rigidity, hardness, and heat resistance compared to the base resin.
RTP Companys color division is focused on satisfying your plastic coloring needs without bias.
You know color makes your products sell — we know that choosing a supplier who delivers quality color in your preferred mode is as important as selecting the right color.
You can rely on RTP Company to deliver consistent color every time and anywhere around the world with short lead times.
Need expert color selection help?Our colorists share a global database of successful matches, which we combine with unequaled polymer knowledge to provide you with accurate masterbatches and precolored resins and compounds.
Your color can be custom formulated to meet your precise appearance target or selected from our palette of popular, successfully proven colors.
Limitations 1.Poor chemical resistance 2.Processing difficulties 3.Low fatigue endurance
Overview Polycarbonate possesses excellent impact strength, high heat resistance and good dimensional stability. It was one of the first thermoplastics to offer these properties. Although it is stable to water, mineral and organic acids, it is partially soluble in aromatic hydrocarbons, soluble in the chlorinated ones, and decomposes in strongly alkaline substances. It has good electrical properties.
The strength and dimensional stability of polycarbonates are further enhanced with fibrous glass reinforcement.
Reinforcement with 40% glass reduces the thermal expansion to 1.0 in/in/degrees F x 10E-5 (1.8 cm/cm/degrees C x 10E-5), which is below that of most thermoplastics and some metals. The tensile modulus is increased fivefold. Flexural, tensile and compressive strengths are doubled. Mold shrinkage is reduced, making it possible to produce very precise parts.
Overview Polysulfone, introduced by Union Carbide in 1965, was among the first thermoplastics developed for long term service beyond 300 degrees F (149 degrees C). Continuous use temperature, according to UL Method 746, is 302 degrees F (150 degrees C) for 40% glass reinforced polysulfone.
The addition of glass fibers to polysulfone results in nearly a twofold increase in tensile, flexural and compressive strengths and threefold increases in modulus values. Glass reinforcement lowers mold shrinkage.
The inherent properties of this material make it ideal for electrical and electronic applications.
Advantages 1.Low water absorption 2.Moldability 3.Strength
Limitations 1.Affected by boiling water 2.Maximum use temperature is 300 degrees F (149 degrees C) 3.Chemical resistance
Overview Polybutylene Terephthalate (PBT) is a crystalline, high molecular weight polymer that has an excellent balance of properties and processing characteristics. Because the material crystallizes rapidly, mold cycles are short and molding temperatures can be lower than for many engineering plastics.
This thermoplastic polyester has very good dimensional stability. It also exhibits high heat resistance, chemical resistance and good electricals. In general, PBT materials exhibit higher tensile, flexural and dielectric strengths and faster, more economical molding characteristics than many thermosets.
In some areas, PBT is replacing other crystalline thermoplastics such as polypropylene, nylon and acetal because of the need for improved performance.
PBT can compete with many amorphous engineering materials such as polysulfone and polycarbonate.
PBTs have excellent resistance to a broad range of chemicals at room temperature, including aliphatic hydrocarbons, gasoline, carbon tetrachloride, perchloroethylene, oils, fats, alcohols, glycols, esters, ethers and dilute acids and bases. They are attacked by strong bases.
Compared to non-reinforced resin, glass-reinforced PBT exhibits a two-to threefold increase in tensile, flexural and compressive strengths and moduli. The reinforced resins exhibit good resistance to oxidation in hot air, comparable to that of nylon 6 or nylon 6/6. Water absorption values are relatively low.
Overview Ketone-based resins such as polyetheretherketone (PEEK) are semi-crystalline engineering thermoplastics that can be used at high temperatures.
Other characteristics of PEEK include excellent chemical resistance, high strength and good resistance to burning. Although PEEK requires high processing temperatures, it can be processed using standard equipment.
Product category: Acetal homo and copolymers (POM)
Advantages 1.Resistance to creep and fatigue 2.Rigidity and resilience 3.Resistance to solvents
Limitations 1.High specific gravity 2.Anisotropic shrinkage 3.Processing difficulties
Overview Acetals are rigid, creep resistant and strong. They possess low coefficients of friction. They remain stable in high temperature service and offer exceptional resistance to hot water environments.
They are virtually unaffected by strong bases but are attacked by strong mineral acids.
A 40% glass reinforced acetal has a flexural modulus of 1.6 psi x 10E-6 (11024 MPa) and 330 degrees F (166 degrees C) heat deflection temperature.
Advantages 1.Strength 2.Stiffness 3.Heat resistance 4.Chemical resistance to hydrocarbons 5.Wear resistance and lubricity
Limitations 1.High water absorption 2.Poor chemical resistance to strong acids and bases
Overview There are many types of nylons commercially available. The versatility of nylon makes it one of the most widely used engineering thermoplastics. Commercial nylons include nylon 6, nylon 4/6, nylon 6/6, nylon 6/10, nylon 6/12, nylon 11 and nylon 12. The numerical nomenclature for nylon is derived from the number of carbon atoms in the diamine and dibasic acid monomers used to manufacture it. The ratio of carbon atoms is what gives each nylon type its unique property characteristics.
Nylon 6/6 is one of the most versatile engineering thermoplastics. It is popular in every major market using thermoplastic materials. Because of its excellent balance of strength, ductility and heat resistance, nylon 6/6 is an outstanding candidate for metal replacement applications. Nylon 6/6 is very easy to process with a very wide process window. This allows it to be used for everything from complex, thin walled components to large thick walled housings.
Nylon 6/6 is very easy to modify with fillers, fibers, internal lubricants, and impact modifiers. With the use of fiber reinforcements, the physical strength of nylon 6/6 can be improved five times that of the base resin. The stiffness of nylon 6/6 can be improved up to 10 times. With impact modifiers, the ductility of nylon 6/6 is comparable to polycarbonate. The use of internal lubricants improves on the already excellent wear resistance and friction properties on nylon 6/6. Its versatility allows it to be used in almost any application that requires high physical strength, ductility, heat resistance and chemical resistance.
Advantages 1.Excellent surface finish even when reinforced 2.Strength 3.Stiffness 4.Chemical resistance to hydrocarbons
Limitations 1.High water absorption 2.Poor chemical resistance to strong acids and bases
Overview Because of nylons versatility, it is one of the most widely used engineering thermoplastics. Commercially available nylons include nylon 6, nylon 4/6, nylon 6/6, nylon 6/10, nylon 6/12, nylon 11 and nylon 12. The numerical nomenclature for nylon is derived from the number of carbon atoms in the diamine and dibasic acid monomers used to manufacture it. The ratio of carbon atoms is what gives each nylon type its unique property characteristics.
Nylon 6 is a tough, abrasion-resistant material. It has improved surface appearance and processability compared to nylon 6/6. It also can be molded about 80 degrees F (27 degrees C) lower with less mold shrinkage because it is slightly less crystalline. Adversely, nylon 6 has a lower modulus and absorbs moisture more rapidly than nylon 6/6. Moisture acts as a plasticizer, reducing tensile strength and stiffness and increasing elongation. But, while absorbed moisture reduces many properties, nylon owes part of its toughness to the plasticizing effect of moisture. As moisture content rises, significant increases occur in impact strength and general energy absorbing characteristics. Properly recognized and accounted for, the effect of moisture on the processing and properties of nylon need not be of great concern.
All nylons can be reinforced with glass fibers, glass beads, and carbon fibers to improve their mechanical and thermal performance. Filled materials containing PTFE and molybdenum disulphide are available for bearing materials with appropriately low friction and improved wear. Nylon 6 is used in applications where toughness, lubricity, and wear are important, such as gear wheels.
Your Global Compounder of Custom Engineered Thermoplastics
Thermoplastics That Provide
Conductive Static Dissipation
Lubricated Wear Resistance
High Continuous Use Temperatures
UL Recognized Flammability
Soft-touch Overmoldable Elastomers
Special Color and Appearance Effects
RTP Company At A Glance
Privately owned specialty compounder
Independent, unbiased product development
Worldwide representation and distribution
5-10 day standard product lead-time
17 global manufacturing locations
ISO 9001 registered facilities
RTP Companys private ownership allows our expert polymer engineers to be independent and unbiased as they select from 60+ engineering resins and 100s of modifying additives to tailor a thermoplastic compound designed to meet your specific end-use requirements.
Our specialty compounds provide multi-property solutions in a single material, reducing manufacturing costs and speeding time to market while providing the freedom necessary for product designers and engineers to realize their vision for applications spanning every major market segment.
If you are in the process of application development, let RTP Company solve your material challenge by formulating a custom thermoplastic compound optimized to make your product a success — dont compromise with another suppliers off-the-shelf offering.
With 18 product plants and a handful of sales offices located in major commerce centers around the world, were equipped to assist you, no matter your location.