Resin Properties & Applications
- ABS - Acrylonitrile Butadiene Styrene
- A resin with high rigidity and impact strength, excellent abrasion resistance, electrical properties, moisture resistance and dimensional stability. ABS is easily machined and may be bored, turned, drilled, milled, sawed, die-cut, routed and sheared using high-speed carbide-tipped tools. Extruded ABS can be easily thermoformed with excellent mold detail on most conventional equipment.
- ASA - Acrylonitrile Styrene Acrylate
- A resin that has good durability, color retention and mechanical properties, with excellent resistance to UV, moisture and heat. ASA is commonly used in applications that require long-term durability in outdoor environments without painting. Common uses include: automotive mirror housings, exterior trim components, gutter systems, fencing, spa and pool steps, snowmobiles, and water craft.
- PA - Polyamide (Nylon)
- A resin with excellent heat, chemical and wear resistance. Nylon can be found in many different types, with Nylon 6 and Nylon 6/6 being the most common. It is one of the most hydroscopic (water absorbing) resins, and the amount of moisture present can have a great affect on the material properties. Nylon is one of the most versatile resins, some of its common uses being: electrical connectors, cable ties, film packaging, fluid reservoirs, brush bristles, oil pans, fabric, carpeting, sportswear and recreational equipment.
- PBT - Polybutylene Terephthalate
- A resin with good strength and stiffness, low moisture absorption, good thermal stability and excellent electrical insulation properties, dimensional stability and chemical resistance. PBT can be easily alloyed with PC and PET, providing for easy processing characteristics and cost-effective uses in many applications. PBT can be used in nearly every application or end-use category.
- PC - Polycarbonate
- A resin with excellent impact strength, high heat resistance, good dimensional stability and good electrical properties. PC is used in a wide range of injection-molded consumer products where strength and shrinkage are critical characteristics. Although it is stable in water, mineral and organic acids, it is partially soluble in aromatic hydrocarbons, soluble in the chlorinated ones, and decomposes in strongly alkaline substances.
- PEI - Polyetherimide
- A resin with high strength and rigidity at high temperatures, long-term heat resistance, high dimensional stability, good electrical properties and broad chemical resistance. It also exhibits good flame resistance without the addition of flame retardants. PEI is commonly used in electrical insulators, cooking utensils and structural components.
- PET - Polyethylene Terephthatate (Polyester)
- A clear, tough resin with good gas and moisture barrier properties. This plastic is commonly used in soft drink bottles and many other injection-molded consumer product containers. Other applications include strapping, molding compounds and both food and non-food containers. Cleaned, recycled PET flakes and pellets are in great demand for spinning fiber for carpet yarns and producing fiberfill and geotextiles.
- PP - Polypropylene
- A resin with excellent chemical resistance, strength and the lowest density of the plastics used in packaging. It has a high melting point, making it ideal for hot-fill liquids. PP is found in everything from flexible and rigid packaging to fibers and large molded parts for automotive and consumer products.
- PPE - Polyphenylene Ether
- A resin that has excellent strength, stiffness and stability, low water absorption, can be easily electroplated, and combines well with flame retardants. However, it also has poor chemical resistance and poor color stability, which means that it has to be painted in some applications. Common uses include: machine and appliance housings, structural foam, water pump components, plumbing fixtures, and electric irons. PPE is commonly mixed with polystyrene, at varying percentages, resulting in a wide array of material grades.
- PS - Polystyrene
- A very versatile resin that can be rigid or foamed. General purpose polystyrene is clear, hard and brittle. It has a relatively low melting point. PS is a comparatively inexpensive resin, which is why it is common in disposable products. Typical applications include protective packaging, containers, lids, cups, bottles and trays.
- TPO - Thermoplastic Polyolefin
- A resin with excellent toughness at low temperatures, chemical resistance, UV resistance, low density and high shear resistance. TPO exhibits many rubber-like properties, hence its use in products like: car bumpers, air dams, instrument panel, computer cables and snowmobiles.
QA Lab Tests & Definitions
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- Color Measurement
- A measurement of the color difference between two specimens using a spectrophotometer. Based on three attributes: light/dark, red/green and yellow/blue. Measured in Delta E (dE).
- A measurement of the amount of stretching a molded specimen exhibits before breaking as it is pulled apart using a constant force. Measured in % of original length.
- Filler Content
- A measurement of the quantity of non-combustible material in a resin. Measured in %.
- A classification of the ability of a molded specimen to resist ignition when a constant flame is applied. Classifications are: V-0, V-1, V-2, 5VA, 5VB and HB.
- Flexural Modulus
- A measurement of the rate of flexing a molded specimen exhibits when it is bent using a constant force.
- Flexural Strength
- A measurement of the force required to bend a molded specimen under a constant load at a constant rate. Measured in pounds per square inch (psi).
- Gardner Impact
- A test that judges the impact resistance of a molded specimen by means of a striker impacted by a falling weight. Measured using pass/fail criteria.
- Heat Deflection Temperature (HDT)
- A measurement of the temperature at which deformation occurs when specimens are subjected to a flexural load while immersed in heated oil. Measured in °C @ psi.
- Izod Impact
- A measurement of the strength of a molded specimen under instantaneous impact. Measured in ft.-lbf./in.
- Melt Flow Rate
- A measurement of the weight of a molten resin that is extruded through an orifice at a constant force and temperature. Measured in g/10 min.
- Moisture Content
- A measurement of the relative percentage of moisture that is present in a resin. Measured in %.
- A test that reproduces the damage caused by sunlight, rain and dew by exposing a molded specimen to alternating cycles of light and moisture at controlled, elevated temperatures.
- Shore Hardness
- A measure of the elasticity of a material and its resistance to indentation by means of a 3 spring-loaded indenter.
- Specific Gravity
- A measurement of the weight of a molded specimen relative to the amount of water it displaces. (water=1)
- Tensile Strength
- A measurement of the force required to pull apart a molded specimen at a constant rate under constant force. Measured in pounds per square inch (psi).
- Visual Inspection Rating
- A relative measurement of the quantity of black specks and pellet defects in a pelletized resin.