Industrial Plastic Resin Balls

Precision Plastic Ball has been a leading manufacturer of high-quality plastic balls for more than 60 years. We’ve created a core offering of plastic resin balls available in 13 different materials to suit your full range of needs and purposes.

Our plastic balls are produced and tested for use in food applications, cosmetic creation, fluid handling, flow control, petrochemical applications, and even hydraulic fracturing.

High-Density Polyethylene (HDPE)

High-density polyethylene (HDPE) is a polyethylene thermoplastic derived from petroleum.

The mass density of high-density polyethylene typically ranges from 0.93 to 0.97 g/cm³. Although the density of HDPE is only slightly higher than that of low-density polyethylene, primarily due to little branching in the material, HDPE has a stronger intermolecular force and tensile strength than LDPE. The differential in strength exceeds the difference in density, giving HDPE a higher specific strength. HDPE is also harder, more opaque and can withstand higher temperatures of 120ºC/ 248ºF for short bursts and 110ºC/ 230ºF continuously.

Low-Density Polyethylene (LDPE)

Low-density polyethylene (LDPE) is a thermoplastic derived from the monomer ethylene and defined by a density range of 0.910-0.940 g/cm³. It is nonreactive at room temperatures, except by strong oxidizing agents, and some solvents that can cause swelling. LDPE can continuously withstand temperatures of 80ºC and, for short periods, 95ºC. Made in translucent or opaque variations, it is quite flexible and sturdy but still breakable.

Since LDPE has more branching than HDPE, its intermolecular force is weaker, tensile strength is lower, and its resilience is higher, and because its molecules are less tightly packed and less crystalline, its density is also lower when compared to HDPE.


Polystyrene (PS) is one of the most widely used plastics at several billion kilograms per year. Polystyrene can either be a thermoplastic or a thermoset. A thermoplastic polystyrene is in a solid (glassy) state at room temperature but flows if heated above its transition temperature of about 100ºC, becoming solid again once cooled. Absolute solid polystyrene is a colorless, hard plastic with partial flexibility. Polystyrene molds with excellent detail and can be manufactured as transparent or to take on a variety of colors.

Solid polystyrene is used typically used in the manufacturing of disposable cutlery, plastic models, CD and DVD cases, and smoke detector housings. Products made from foamed polystyrene are nearly ubiquitous with insulation, foam drink cups, and packing materials.

Delrin (Acetal Homopolymer)

Polyoxymethylene (POM), also known as acetal, polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts where high stiffness, low friction, and excellent dimensional stability are required. As many other synthetic polymers, Acetal Homopolymer is produced by various chemical firms with varying formulas and under many commercial names, such as Delrin, Celcon, Hostaform, etc.

POM, characterized by its high strength, hardness, and stiffness to ~40ºC., is intrinsically opaque white, but it is available in all colors. POM has a density of 1.410-1.420 g/cm³.

POM homopolymer is a semicrystalline polymer (75-85% crystalline) with a melting point of 175ºCelsius. The POM copolymer has a slightly lower melting point of 162-173ºCelsius.

Celcon (Acetal Copolymer)

Celcon’s semi-crystallinity improves its dimensional stability, strength, and toughness and has a similar chemical makeup to Delrin (Acetal Homopolymer). However, Celcon has a better chemical resistance in high pH solutions and a lower centerline porosity. Natural grade Acetal Copolymer is FDA, USDA, NSF and 3A Sanitary compliant.


Phenol formaldehyde resins (PF) are synthetic polymers obtained by the effect of phenol, or substituted phenol, with formaldehyde. Phenolic Balls and G-10 Glass Epoxy Balls offer excellent abrasion and impact resistance for valves, pumps, and flow control. Phenolic makes a great fitting replacement for Stainless Steel in most applications because it provides heat and chemical resistance with superior compressive and tensile strength compared with when compared to other plastic balls.


Polypropene is a thermoplastic polymer used in a wide variety of applications including packaging and labeling, textiles, stationery, plastic parts and reusable containers of various types, laboratory equipment, loudspeakers, automotive components, and polymer banknotes.

Polypropylene is mostly hard and flexible, particularly when copolymerized is with ethylene. Polypropylene is economical, and can be translucent when uncolored but is not as readily made transparent as polystyrene, acrylic, or certain other plastics. It is often opaque or colored using pigments. Polypropylene has great resistance to fatigue and a melting point of 171ºC (340ºF).


Cellulose Acetate is a natural plastic primarily derived from cotton linters and wood pulp. Acetate is resistant to oil, water, and abrasion and typically used in mechanical strength applications


Acrylic, also known as PMMA or Polymethyl Methacrylate is a clear thermoplastic material, often used as a lightweight substitute for glass due to its durability and lightweight. Even with a density of 1.17 – 1.20 g/cm³, less than half that of glass, Acrylic or PMMA  has an impact strength higher than both glass and polystyrene; though Acrylic’s impact strength is considerably lower than polycarbonate and some engineered polymers. At 3mm thickness, PMMA transmits up to 92% of visible light, giving a likeness of about 4% from each of its surfaces on account of its refractive index. It also filters ultraviolet (UV) light at wavelengths below about 300 nm.

Acrylic swells up and dissolves in many organic solvents; it also has poor resistance to many other chemicals. Its environmental constancy is superior to other plastics such as polystyrene and polyethylene, and PMMA is therefore often the material of choice for outdoor applications. PMMA has a maximum water absorption ratio of 0.3 – 0.4% by weight and tensile strength decreases with increased water absorption. Its coefficient of thermal expansion is relatively high at (5-10) x 10-5 /K.


Polycarbonate (PC) is a linear polycarbonic acid ester prepared from a dihydric phenol. Polycarbonate possesses extraordinary dimensional stability with a high impact power maintained over a wide temperature range, making Polycarbonate ideal for the manufacture of laboratory safety shields, vacuum desiccators, and centrifuge tubes.


Nylatron is a trade name for a group of nylon plastics, naturally filled with molybdenum disulfide lubricant powder. It is used to cast plastic parts for machines, because of its mechanical properties and wear resistance.

Nylatron is a brand name of DSM Plastics and was first developed and manufactured by Polypenco. Nylatron works well in rotary lever actuators where odd shapes are required and as heavy-duty caster wheels, mostly as a replacement for cast iron or forged steel.


Nylon is a generic title for a group of synthetic polymers known generically as polyamides. When solid, nylon is used for mechanical parts such as machine screws, gears and other low- to medium-stress components formerly cast in metal. Engineering nylon is developed by extrusion, casting, and injection molding. Type 6, 6 Nylon 101 is the most common commercial grade of nylon, and Nylon 6 is the most common commercial grade of molded nylon.

The melting point of nylon 6, 6 is 509ºF (265ºC).


PVC itself is hard and rigid, but the addition of phthalate esters as plasticizers makes it soft, pliable and ideal for gloves, photographic dishes, and tubing. Polyvinyl chloride is transparent with a bluish tint and is attacked by many organic solvents, but it has an excellent resistance to oils, and it has a low permeability to gasses. It is not recommended for use above 70º Celsius although it can be taken to 80º for short periods.

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