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Plastic Extrusions Manufacturers and Companies

IQS Directory provides a comprehensive list of plastic extrusion manufacturers and suppliers. Use our website to review and source top plastic extrusion manufacturers with roll over ads and detailed product descriptions. Find plastic extrusion companies that can design, engineer, and manufacture plastic extrusion to your companies specifications. Then contact the plastic extrusion companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product new articles. Whether you are looking for manufacturers of coextrusions, plastic h channels, plastic extruded plates, or customized plastic extrusion of every type, this is the resource for you.

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Preferred Plastics is an ISO 9001:2000-certified custom plastic extruder, specializing in rigid, flexible & co-extruded products, including extruded tubing. Preferred offers a wide range of secondary & in-line services, including cutting, drilling, punching, routing, stamping and more. By choosing preferred plastics as your custom extrusion manufacture you will be relying on someone you can trust!
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Since 1973, Polytec Plastics has been a leader in the manufacture of high-quality plastic extrusions, plastic profiles & more. Our engineer team offers design assistance. Polytec Plastics can help you select the best possible material to fit your budget & application needs. Whenever possible we suggest using our selection of standard part tooling which consists of thousands of channels, rods, etc.
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Since 1978, SFR has been a leader in custom plastic profile extrusions, specializing in vinyl polymers for a variety of industries ranging from commercial furniture and store fixtures to industrial applications. We will assist you with your unique requirements. We`ll make your ideas take shape! We know how to remain a leader in custom plastic extrusion profiles - by keeping up with change.
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We have a long history of providing plastic extrusions. We will proudly serve you and we are committed to quality customer service. Our plastic extrusions are used in industries ranging from automotive to medical. These units are optimized for design, performance and quality. From pre-prototype to post production, we do it all. Please visit our website for more information!
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We can manufacture your plastic extrusions with various materials including: PVC, PU, PE, ABS, styrene, TPE, TPU, urethane and more. We can provide you with extruded profiles in a variety of shapes and sizes designed to be durable, flexible or rigid, while being compatible with almost any application. Our solutions and products are competitively priced and we will always provide you with outstanding after-sale support.
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We have the custom manufacturing and our stock items come in a variety of shapes, colors and designs. Our goal is to meet your specifications and we have highly trained engineers to do just that. We are partnered with different companies for maximum extrusion options and we are available for our customers at anytime. We are the plastic extrusions experts. If you need to speak with an extrusion specialist then please give us a call!
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A plastic extrusion manufacturer of extruded plastic products, GSH Industries manufactures custom plastic extrusion profiles. We have continually expanded & attained our position as a preferred supplier of quality products & engineering ingenuity at competitive pricing & on-time delivery. With our experience in the plastics field & our facility, we have positioned ourselves into the next century.
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Petro specializes in plastic extrusions, offering our customers many capabilities, such as customized shapes & extruded tubing, along with tape application, coiling & angle cutting. We have a full staff of engineers who can assist you & ship out stock products within 24 hours of your order. At Petro, we take extreme pride in our service & quality. We will deliver a product on time - every time.
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Here at Waltech Engineered Plastics, plastic extrusion is our specialty. We have the capability of fulfilling the detailed requests of our clients. We believe variety is vital in providing the best for our clients, which is why we offer our extrusions in a multitude of colors and materials. Contact us today!
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Industry Information

Plastic Extrusions

Plastic extrusions are plastic shapes produced by forcing molten plastic through a die. Plastic extrusion is a continuous process that produces long plastic profiles; plastic strips, plastic channels, plastic trim and other basic plastic shapes are all produced by plastic extruders. Plastic extrusions play an important roll across industry, commerce and in consumer markets.

Automotive manufacturers employ extruded plastics as engine components and as decorative and functional trim on auto exteriors. PVC extrusions, particularly PVC tubes, are used extensively in plumbing systems and in wastewater treatment operations. Chemical processing operations also make use of extruded plastic tubing, and because different plastics feature different qualities of reactivity when exposed to chemicals, plastic materials are chosen for their applications based on such qualities. Acrylic extrusions, for example, are characterized by their optical clarity and durability. They are, for these reasons, often well suited to use as tubing in chemical processing, because their contents can be easily visible when inspected by workers. Some unique applications call for an extrusion that features the qualities of more than one material. In these cases, coextrusion can be used to mix two plastics together, allowing for the qualities of two plastic materials to be present in one product.

The term polymer extrusion is sometimes used interchangeably with plastic extrusion. This is not incorrect, though it is not the most precise way to describe the process. Technically, a polymer is a large molecule made up of many similar monomers, which are small molecules. Biopolymers like proteins and nucleic acids are essential for life. These are not the kinds of polymers to which the words "polymer extrusion" refer. When the words "polymer" and "extrusion" are paired together, they refer only to plastics and elastomers (natural rubber is an example of an elastomer). In the case of plastic extrusion, a very long list of plastic materials is at the disposal of companies that provide plastic fabrication services. High density polyethylene (HDPE), low density polyethylene (LDPE), PETG, PVC, butyrate, vinyl, polypropylene, and polystyrene are just a few of the most commonly extruded thermoplastics. A thermoplastic is a plastic material that, when exposed to sufficient heat, becomes plasticized. A plasticized thermoplastic can be shaped into useful products and retain the shape once cooled. Thermoplastics are highly valued for this quality, and they are also valued because they can be recycled at the end of their lifespans and reshaped by the same process.

The plastic extrusion process is very standardized, and there are few deviations between extrusion operations in terms of the basic principles of extrusion. Operating temperatures and output speeds may vary depending on the properties of the plastic material, but plastic extrusion processes resemble each other very closely aside from these differences. The extrusion process begins with a collection of raw plastic materials in a hopper suspended above a conveyance channel. When a panel at the bottom of the hopper is removed or retracts, gravity directs the plastic into the channel. Inside the channel is a long shearing screw that forces the plastic down the channel as it turns. The friction caused by the turning of the screw causes the plastic to become molten. Some extruders feature supplementing electrical heating elements to aid in the melting of the plastic. By the time the plastic reaches the end of the channel, it is ready to be shaped. At the end of the channel is a die, which is a specially-designed tool used to form raw materials into usable products. In the case of plastic extrusion, a die is a metal plate cut with a hole through which the plastic is forced.

When the molten plastic reaches the die, it is forced through, taking its shape as a result. The plastic emerges on the other side of the die as newly extruded plastic material. The plastic is quickly cooled, which causes it to harden and keep its shape. The extrusion can then be cut and prepared for shipment or sent for additional processing like labeling, painting, anti-static treating or other surface treatment. The shape of an extrusion die determines the shape of the extrusion. Every die is different; they are specially designed to accommodate individual processes. The simplest possible die designs are nothing more than simple shapes. A circle-shaped die would produce a plastic rod, while a square-shaped die would produce a continuous plastic square. Extrusions like pipes require dies fitted with special pins that allow hollow places to form. Textured plastic sheets like floor mats can also sometimes be produced by extruders. Plastic sheet dies would be flat with grooves to create the texture. The coextrusion process, in which two or more plastic materials are combined in a single extrusion, features one die connected to a forked conveyance channel into which the different materials are directed and mixed together. The number of possible extruded plastic shapes is limited only by the imaginations of their designers.

Plastic Extrusions
Plastic Extrusions Manufacturers
Plastic Extrusions Manufacturers
Plastic Extrusions - Creative Extrusion & Technologies, Inc.
Plastic Extrusions Manufacturers - Creative Extrusion & Technologies, Inc.
Plastic Extrusions Manufacturers - Polytec Plastics, Inc.
Plastic Extrusions Manufacturers
Plastic Extrusions
Plastic Extrusions
Plastic Extrusions Manufacturers - SFR Industries Inc.
Plastic Extrusions - SFR Industries Inc.
Plastic Extrusions - Preferred Plastics, Inc.

4 Huge Benefits of Plastic Extrusion in the Production of Plastics

Have you ever wondered how commonly used plastic products, such as pipe/tubing, weather stripping, fencing, deck railings, window frames, plastic films and sheeting, thermoplastic coatings, and wire insulation, are manufactured? These products, commonly called extruded plastics, are the result of plastic extrusion, a low cost, low-tech production method. Plastic extrusions are considered a subsidiary of injection molded plastics, which are manufactured using another plastic molding technology, albeit a more complex process than plastic extrusions.

Plastic extrusion is similar to plastic injection technology. It is a high-volume plastic manufacturing process where raw plastic materials, which are in the form of pellets, powders, granules, or flakes, are fed into the barrel of the extruder. Heat generated from rotating screws inside the barrel and heaters arranged along barrel liquefies the material. The liquid polymer is then forced into a die to shape it into a continuous profile. Once the output cools and hardens, it is cut to desired length.

Due to a number of benefits, plastic extrusion is used to produce numerous extruded plastics-PVC channels, plastic channels, plastic strip, and plastic profiles to name only a few. Below, we will list several benefits of the plastic extrusion process.

High speed, high-volume and low-cost production: Plastic extrusion is a highly efficient and inexpensive process compared with other molding methods. It offers low wastage since the molding process utilizes thermoplastic, which repeatedly undergoes melting and hardening, enabling the manufacturer to reuse the plastic that is left after trimming or cutting the extruded products. Plastic is easy to melt, which results in a quicker production run and low energy intake. Extrusion machines can run continuously which cuts the chances of inventory shortage. Moreover, cheap feedstock, reduced tooling costs, and low disposal expenditure mean this is the ultimate low-cost production method.

Flexibility: Plastic extrusion molding offers flexibility when the product is required to have a consistent cross sectional profile. Additionally, the machine can produce complex shapes with differing thickness, hardness, size, color, and texture; the only catch is the cross section needs to remain the same throughout. Flexibility also comes in another form-manufacturers can easily tweak the process to produce plastic sheets or make products that mix plastic attributes.

Allows post-extrusion alteration: Plastic takes time to cool down; it remains hot after it is removed from the extruder. This makes it easy for manufacturers to implement changes to the plastic after the completion of the extrusion process, using a variety of tools like rollers, shoes and dies.

Coextrusion: Compared with other molding methods, plastic extrusion can accommodate coextrusion. Plastic extrusion generally refers to single layer extrusion; as the name suggests, coextrusion involves using two or more extruders. Plastic is pumped from two (or more) extruders to a single die. The main benefit of this is that different types of plastic and compound with different thickness can be fed into the system at different speeds. This is done to achieve products that meet a wide range of functional requirements, from UV treatment to polymers that glows in the dark.

Plastic extrusion is an exceptionally versatile process, which allows plastics to be made of intricate shapes and different thickness, hardness, size, color, and texture.

Different Types of Extruding Methods

Given the various types of extruded plastics available, evidently, it is not possible to make all those profiles and related variations with one method. However, if examined closely, mainly a single extrusion process, with number of tweaks, is employed for manufacturing of different types of extruded plastics. Here in this blog, we are discussing those tweaks in methods.

Method for extruding standard profiles

In the simplest and most common process, to make profile extrusion, resin is passed through a barrel, which melts the plastics. Then the molten plastic is molded by different set of dies, based on the requirement. For instance, to make hollow sections a mandrel is placed within the die. Similarly, for multi lumen tubes, a couple of pins are tooled in to the die, and as the molten plastic moves through the pins, it extrudes two holes in the product. Sometimes, positive pressure is also applied to supplant the whole process to adjust the size of the lumen with pressure.

Extrusion with multiple extruders

When multiples layers of plastic needs to be extruded, a process called, co-extrusion is employed. In this manufacturing method, multiple, however, typically, two extruders are used for melting different types of the resin and delivering material for extrusion at steady rate and volume. The materials delivered by the extruders are passed through a single die to give a desired shape and form. The process is specifically used when blown film and sheets are to be fabricated. With this method, a single product is made from two types of resin in layers, one layer provides the structural integrity, and the other layer, which usually is thinner, adds protection against weathering effects on the polymer.

Extrusion for Making Plastic Shopping Bags

The method used for making shopping bags and plastic films is known as blown film extrusion. The method is similar to standard plastic extrusion but it employs a different type of die, which is the shape of cylinder having annular opening. As the molten material leaves the barrel of an extruder, a couple of rolls pulls the material to change the gauge of the molten resin, and the die tooled with an air outlet blows air into the cylindrical profile to give it the final shape. At the end, a cooling mechanism, typically, cooling ring is affixed to cool the film. To regulate the thickness of a product, the rate of revolution of the rolls is changed according the needs of the product.

Extrusion for making Kernels

Some machines make plastic pellets by extruding different types of resin together. The machines follow the same procedure as that of standard extrusion, however, the finished products are not profiles or tubes but beads, which act as a raw material for manufacturing processes.

Extrusion with 3D Printers

With the development of modern 3D printers, plastic can be extruded into elaborate shapes and structures. 3D printing is a new addition to the extrusion process, giving fabricators opportunity to fabricate any shape imaginable. Instead of a molten resin, in this process, a filament is utilized as a feedstock.

Common Problems and Their Solutions for Thin Gage Extrusions

Manufacturing thin gauge sheets has its own set of challenges that play critical factors in the extrusion process, including mechanical and physical properties, raw materials, working conditions, roll construction, and drooping. Many manufacturers experience these problems, which influences quality and downtime.

Therefore, we are discussing the origin of common problems and their solutions in extruded plastics process.

For ideal extruded plastics, you need to maintain stable head pressure, have consistent temperature at heating zones, and create uniform melt flow. Most of the problems originate from these three factors. Therefore, when thin gauge is involved, uniform melt homogeneity and melt pressure should be achieved. In the following, we are discussing other factors that influence the extruded plastics process.

Variations in Concentration of Raw materials

The factor that surpasses other elements in regulating the quality of the product is the raw materials. From homogeneity of the molten resin to the finish of the product, all quality is directly determined by the raw material. For thin gauge extrusion, process conditions need to be stable, without any major pressure surges, also known as pressure oscillations. Change in the pressure affects the uniformity of the molten resin. In a standard settings, pressure oscillations of ±50 psig are considered acceptable, however, anything above that influences production. To achieve stable process conditions, variation in concentration of raw materials in terms of virgin and regrind blends should be avoided.

Melt-bank Uniformity

The lack of melt bank uniformity can cause many variations in the product, ranging from spotty finish to irregular polishing patterns. To check the presence of dull spots on the finished product, regulating the chrome-roll temperature is essential. The temperature should be kept high to discourage freezing of the bank. The other way is to shorten the distance between the die-lip exit and the primary nipping rolls- the ideal distance is 4 to 8 inches. However, there are factors that limit the distance between the die lip and primary rollers, such as area covered by the die, the die deckles, and appendages. To avoid this problem, the die should be tooled with contours to reduce the cross section area.

Design of Rolls

When production of thin gauge is involved, rolls should have capacity to manage high roll loads. For this purpose, special rollers known as spherical tapered rollers are considered suitable. However, when spherical tapered rollers are installed in an extruder, additional equipment, such as bearing journals and roll shafts, also need to be designed appropriately in the extruder.

Roll Deflection

The common problem that all fabricators face is deflection of the roll. To rectify this problem, three solutions are available. The first involves a crowned roll, which has a pre-ground camber. This technique, however, limits the range of the production because the dimension and geometry of the camber remain fixed. The second method involves counter-bending rolls, however, just like the first method, the technique limits the production window. The last solution involves roll skewing. The roll skewing method, unlike the first two solutions, is highly versatile and removes deflection in a wide range of operations.

Advances in Plastic Extrusions

There have been various positive signs for the growing economy. Plastic solutions are among the materials that are used in a large spectrum of industries and applications. When the demands for these products increase it is an indicator that other industries may also have increasing demands. Plastic solutions are more widely accepted as a viable and trustworthy component compared to their counterparts such as metal or wood. There are numerous benefits when utilizing plastic products. Plastic extrusion products have been proven as a vital material for the medical and clean room industries. These industries require sterility and the surface of plastic items are ideal for maintaining high levels of cleanliness. The uniform molecule structure is also a significant advantage. The medical industry, for example, benefits from this structure because many medical applications require tubing and through the plastic extrusion process manufacturers can achieved the desired specifications of those applications.

To meet the higher demands many manufacturers have been upgrading facilities in recent months which allows for faster and larger volumes of plastic extrusions but also more accuracy when cutting the plastic items. Sophisticated products are equipped with more intricate parts so manufacturers must have the capabilities to adhere to exact specifications even down to the smallest measurements. These newer processes have very interesting attributes and even though the products are being manufactured at a faster pace the integrity of the structures are not being compromised. Manufacturers will work with customers to create affordable solutions that adhere to sterility and dimension requirements.

Plastic Extrusion Types

  • Acrylic extrusions are extruded plastic shapes made of acrylic materials. Acrylics are primarily characterized by their optical clarity.
  • Coextrusions are materials that are a combination of one or more polymers combined in the extrusion process.
  • Extruded plastic tubing products are tubes produced by a plastic extruder. 
  • Extruded plastic netting is produced in a continuous process resulting in a stable net structure in which the hole size is held constant, unlike a woven or knitted product. Extruded plastic netting is typically utilized in vertical applications such as walls for pens, separation in water, filtration, predator control or barriers.
  • Extruded plastic sheets are plastic powder or pellets that have been formed into sheet products with a range of thickness from less than 0.010 in. (film) up to and exceeding 2.0 inches, with widths as great as 30 ft. This sheet can be further processed into parts via thermoforming.
  • Extruded plastics are made by pouring liquid plastic into dies.
  • Plastic channels are strips of plastic that are shaped for a specific purpose and cut to length.
  • Plastic extruders are machines that create plastic extrusions like rods, tubes and channels.
  • Plastic profiles are extruded stock shapes of plastics including HDPE, polystyrene, butyrate, vinyl, PVC, LDPE, nylon, polyurethane, acrylics and fiberglass.
  • Plastic rods are cylinder-shaped components made of plastic materials.
  • Plastic shapes produced by extrusion include strips, trim, tubes, pipes and many other shapes.
  • Plastic strips are extruded plastic shapes characterized by their length and narrowness.
  • Plastic trim is a linear extruded profile that can be extruded to any length.
  • Polymer extrusion is the shaping of raw plastic and elastometric materials into usable products. 
  • PVC extrusions are extruded plastic shapes made of polyvinyl chloride. PVC is one of the most popular plastic extrusion materials worldwide.
  • Vinyl extrusions are extruded products that are made of polyvinyl chloride (PVC), including pipes, siding and floor coverings

Plastic Extrusion Terms

Adiabatic Plastic Extrusions - Plastic extrusions whose only source of heat is the conversion of the drive energy through the viscous resistance of the plastics mass in the plastic extruders.
Back Pressure - The resistivity of molten plastic material to forward flow.
Barrel - The part of the plastic extruders encasing the screw or plunger.
Barrel Liner - The sleeve forming the inner surface of the plastic extrusions barrel.
Calendering - The plastic extrusions process of pressing or smoothing material between rollers.
Cladding - Sometimes referred to as sidings it is extruded PVC-U boards that are used as outdoor weather-resistant fade panels.
Compound - Any plastic material prepared for subsequent manufacturing processes, specifically plastic extrusions, molding or calendering.
Compression Section - The transition section of a screw channel in which a reduction in the screw channel volume occurs.
Cooling Tank - A tank typically containing water through which plastic extrusions are constantly passed for cooling.
Cure - The technique of cross-linking a plastics material.
Decompression Section - The section of two-stage plastic extruders in which an increase in screw channel volume occurs.
Die - The component on plastics extruders affixed to the plastic extruder's head through which the melt is pushed to form the desired profile.
Die Plate - In moulds, the main support for the punch or mould cavity.
Dry Blend - A free flowing blend of compound or resin and other ingredients as prepared for an additional manufacturing operation specifically for plastic extrusions or molding.
Extrudate - The product or result of the plastic extrusions process. An extrudate is a product or material forced through a shaping orifice as a continuous body.
Extruder Size - The minimal inner diameter of the plastic extruders barrel
Extrusion Coating - A coating technique in which molten plastic feeds directly from plastic extruder dies into a nip-roll assembly combined with the substrate.
Haul-off - Also called a caterpillar, it is an apparatus used for the continous removal of extrudate from the die.
Heat Aging - The unique process of aging a thermoplastic or thermoset product and examining the percentage of retained physical and chemical properties after exposure to heat for a prolonged period of time.
Melt - Any plastic extrusions material heated to a plastic condition.
Melt Strength - A term that refers to the strength of molten plastic.
Outer Die Ring - The element of tubing tie that shapes the outer surface of a tube.
Pellets - Resins or mixtures of resins with compounding additives in the shape of similar-sized tablets and granules that have been extruded or chopped into short segments to prepare them for molding or extrusion operations.
Ram Extruder - A barrel with a temperature control, wherein a plunger pushes material in a melted state to the die.
Resin - Any of several physically similar polymerized synthetics or chemically altered natural resins, such as thermoplastic materials (polyvinyl, polystyrene, polyethylene) or thermosetting materials (epoxies, polyesters, silicones used with fillers, stabilizers, pigments).
Screw - A helically grooved rotating element inside the barrel of screw plastic extruders. The main purpose of a screw is to melt and feed raw material from the feeder to the die, but it also homogenizes, compresses and pressurizes the material.
Screw Extruder - A machine comprised of a barrel with a temperature control. It houses one or more rotating screws, which pass plastic materials from the feed aperture and move them in the form of melt under pressure through a die.
Take-up - An apparatus for reeling extruded plastics material.
Thermoset - A term that refers to the family of materials that can be melted only once during the original processing and cannot be reprocessed after the original part is made.
Thermoplastic - Any material, such as polyethylene, Santoprene and ABS, that can be remelted and reprocessed without considerable loss of properties or scrap loss.
Torpedo - An apparatus at the discharge stage of the screw for finishing homogenizing and blending of the melt.
Trunking - An extruded PVC-U channel used to contain and protect pipes or cables.
Vacuum Sizing - A procedure utilizing a sizing die with a vacuum applied to the outer surface of the extrudate.
Vinyl - A generic term for PVC, it is one of various compounds of ethylene that are polymerized to form resins and plastics (e.g. polyvinyl or polyethylene plastics).

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