Common Thermoplastic Polymer Types Used in Plastic Profile Extrusion: PVC, PC, ABS & More

A thermoplastic polymer softens when heated and solidifies when cooled, allowing it to be shaped into continuous plastic profiles. Common candidates include PVC, polycarbonate, ABS, acrylic, polyethylene, polypropylene and thermoplastic elastomers. The material family helps build a shortlist; the formulation, processing grade and finished section determine whether a candidate meets the application.

Start with the profile's function. Does it need to support a component, transmit or diffuse light, provide a flexible contact edge, or retain its appearance outdoors? Connect that function to a material candidate, then identify the evidence and sample checks needed before approval.

How Profile Extrusion Turns Material Into a Continuous Section

In conventional thermoplastic profile extrusion, material is heated and plasticized, pushed through a shaped die, then supported and cooled into a continuous section. The product may be cut into lengths or collected in another suitable form. Typical shapes include channels, trims, covers and flexible strips.

 

"Thermoplastic" describes the material's response to heat, rather than whether the finished part is rigid. Flexible compounds also belong to this category. TWI's thermoplastic overview identifies extrusion as one of the processes used to shape these materials.

 

A further distinction is between amorphous and semi-crystalline polymers. ABS and PVC are examples of amorphous materials; PE and PP are semi-crystalline. That classification helps explain thermal behavior, but cannot establish a particular profile's dimensional capability or chemical suitability.

 

This article covers conventional thermoplastic profiles. It does not provide universal processing settings or establish approval for regulated applications.

A polymer family identifies the broad material chemistry. PVC, PC and ABS are family names, rather than complete purchasing specifications.

A compound combines a polymer with ingredients selected for a purpose. These may include stabilizers, colorants, fillers or modifiers. The British Plastics Federation's PVC overview explains how formulation influences flexibility and other properties. A rigid PVC channel and a flexible PVC strip can therefore share a family name while performing different jobs.

A grade is the supplier's specific material designation. It connects a proposed resin or compound to its technical data sheet and processing guidance. Covestro's Makrolon PC portfolio, for example, includes materials for different applications and processing methods. "PC" alone does not identify the appropriate option.

For a project specification, identify the family, define the required formulation characteristics, and confirm the grade with the processor. Review substitutions against the same application requirements; a shared family name does not establish equivalence.

The following table is a starting map for discussion, not a performance ranking. It describes functions to investigate, rather than guaranteeing that every formulation is suitable or that Dachang supplies every listed grade.

The checks are a project-planning framework, rather than a standardized qualification procedure.

PVC: Rigid and Flexible Formulations

PVC means polyvinyl chloride. Unplasticized polyvinyl chloride, commonly abbreviated PVC-U, is associated with rigid products such as window profiles. Plasticized formulations provide flexible alternatives. BPF identifies plasticizers and other additives as important formulation choices.

If the section must hold another component in position, begin with a rigid formulation and define the load and fit requirements. If it must deform against a mating surface, discuss a flexible formulation and specify the required contact behavior and recovery.

For a custom PVC profile, include the required rigidity or flexibility, mating surfaces and service conditions in your inquiry. Ask which compound and processing grade can be considered for the proposed section.

PC and PMMA: Choose the Starting Point by Function

Polycarbonate, or PC, and polymethyl methacrylate, or PMMA, are both relevant to transparent and light-handling applications. "Clear plastic" is still an incomplete specification: a protective cover, a display edge and a diffuser perform different tasks.

A useful initial screening approach is:

• When transparency and impact resistance are central requirements, start the discussion with an appropriate PC grade. Covestro describes these characteristics in its Makrolon polycarbonate portfolio. Confirm performance for the actual section and impact conditions.
   
• When optical appearance and resistance to outdoor weathering lead the brief, include an appropriate PMMA grade early. PLEXIGLAS GS/XT product information describes those characteristics for its branded acrylic products. The cited range covers products such as sheets, rods and tubes; it does not qualify a custom profile.

These are screening directions drawn from supplier information, rather than a controlled comparison of two finished profiles. Where impact and outdoor appearance both matter, keep both candidates open until the grade and sample evidence resolve the choice.

For lighting, specify whether the profile should transmit light clearly, conceal individual light sources or produce a particular visual effect. Check the sample in the intended assembly.

Dachang's acrylic lighting and signage profiles illustrate possible product forms. For a PC or PMMA inquiry, describe the optical function, impact requirements and indoor or outdoor exposure so the proposed material can be reviewed against the application.

ABS: Separate Indoor Requirements From Outdoor Exposure

ABS means acrylonitrile butadiene styrene. It is a candidate for rigid sections where shape and visible finish matter. Dachang's extruded ABS profiles and strips include application examples such as appliance trims, furniture sections and shutter profiles. These listings show product forms, rather than independent performance results.

For an indoor trim, begin by defining fit, visible surfaces and any planned printing, coating or bonding. An acceptable color sample does not establish assembly performance.

For sustained sunlight exposure, do not approve a generic ABS specification without weathering evidence. Add a weatherable material candidate to the discussion instead of treating an indoor ABS example as sufficient proof for outdoor use.

ASA, or acrylonitrile styrene acrylate, is one such candidate. INEOS Styrolution identifies Luran S 797SE as an extrusion-oriented ASA grade with UV-resistance characteristics. This supports investigating a suitable ASA grade; it does not establish a service life for a proposed profile.

A blended compound and a separate protective cap layer are different material designs. If either is proposed, confirm its composition or layer arrangement and evaluate the finished system. Include the proposed construction and exposure conditions in your inquiry, and ask whether suitable materials and processing options are available.

PE and PP: Specify the Type Before the Grade

Polyethylene, or PE, includes types such as low-density polyethylene and high-density polyethylene. Polypropylene, or PP, also needs qualification: BPF's polypropylene overview distinguishes homopolymer, block copolymer and random copolymer types. These are meaningful material distinctions, rather than interchangeable purchasing descriptions.

BPF describes PP homopolymer as stronger and stiffer, block copolymer as offering improved impact resistance, and random copolymer as more flexible and transparent. Use these distinctions to screen for stiffness, impact or appearance requirements, then confirm an extrusion-suitable grade. These are association-level material descriptions, not test results for a finished profile.

For a functional strip or section, define stiffness, sustained loading, contact media and critical dimensions before selecting the type and grade. "PE or PP" is a reasonable early question, but too broad for a final specification.

Do not transfer a molding shrinkage value from a general reference into an extrusion tolerance. The drawing and proposed process require a separate review.

TPE, TPU and TPV: Describe the Flexible Function

Thermoplastic elastomer, or TPE, is a broader material class combining elastic behavior with thermoplastic processing. Thermoplastic polyurethane, or TPU, and thermoplastic vulcanizates, or TPV, belong within that class. They are not three mutually exclusive names for equivalent materials. TWI's TPE overview explains the different groups.

 

For a flexible lip, cushion or sealing feature, describe how far it deflects, whether it remains compressed, and what it contacts. Hardness is useful, but assembled recovery and contact behavior also need evaluation.

 

If the flexible feature must bond to a rigid profile, identify the exact substrate. The KRAIBURG TPE product database lists different adhesion-oriented compounds for PP and for polar plastics such as PC and ABS. This helps screen candidates, but does not prove compatibility in a particular coextrusion design.

 

For a flexible or multi-material profile inquiry, provide the mating material, required movement and contact conditions. Ask which material combinations can be assessed and what sample checks would be needed to evaluate the interface.

A material must suit both the application and the method used to produce the section. Ask the processor to confirm the proposed grade's suitability for profile extrusion and obtain its handling guidance.

Check the supplier's stated processing methods for the exact grade. For example, the INEOS processing information linked above identifies specific Luran S extrusion grades with an "E," including 797SE. This is a supplier-specific designation, not a universal naming rule.

The general sequence is material preparation and feeding, plasticization, shaping through the die, suitable calibration and cooling, haul-off, and cutting or collection. The support method depends on material and geometry. Vacuum calibration may be appropriate where controlled sizing is required; it should not be assumed necessary for every flexible strip.

Preparation is also grade-specific. Lubrizol's Pellethane 5863-85A-R1 TPU data sheet includes moisture-control and drying instructions, together with separate extrusion and injection-molding processing guidance. The accessible file carries a 2020 copyright notice. Obtain the current applicable revision before using it for production.

The same document cautions that small-scale material results do not necessarily establish end-product performance. Review the finished profile's fit, straightness, appearance and function separately.

Agree tolerances for the actual section, material and inspection conditions. Identify the dimensions that control assembly so the feasibility review can focus on the features that matter.

Describe service conditions in terms the supplier can evaluate: temperature conditions, sunlight, moisture, cleaning agents and contact duration. "Outdoor use" and "chemical resistant" do not identify the exposure or acceptable change.

For example, decide whether an exposed cover must retain appearance, optical performance, mechanical function or all three. Define the acceptance checks before comparing samples.

Also distinguish resistance to UV-related deterioration from blocking UV transmission. PLEXIGLAS lists both UV-transmitting and UV-protective products. A material's resistance to sunlight does not, by itself, specify which wavelengths it transmits.

For a profile containing multiple materials, define each material's function and the required interface behavior. Ask whether the proposed grades suit the intended processing method, then evaluate representative samples under the intended conditions. An adhesion listing is a screening aid; finished-interface acceptance remains a separate task.

If the application requires compliance documentation, identify the destination market, intended use and document scope in your inquiry. Ask which documents are available for the proposed material or finished product, and check that they cover the relevant grade, formulation and application.

A useful shortlist connects each candidate material to its purpose, supporting evidence and unresolved checks. Prepare:

• A section drawing, overall dimensions and intended cut length or collection form.
• The profile's function and mating components.
• Required rigidity, flexibility or recovery.
• Transparency, diffusion, color and visible-surface requirements.
• Service temperature conditions, sunlight, moisture and contact chemicals.
• Critical fit dimensions, straightness and assembly checks.
• Proposed material interfaces, coatings or other finishing operations.
• Sampling quantities, production quantities and required documentation.

For each candidate, record the proposed grade, why it is being considered, and what the finished sample must demonstrate. This makes substitutions easier to review and keeps approval tied to the application.

To discuss a custom profile, explore Dachang's plastic profile materials and email your drawing and requirements to ken@euson.cn. Include your preferred material, service conditions, critical dimensions and documentation needs. Ask us to confirm available material options, section feasibility and the documents that can be provided, then agree the sample checks needed before fixing the production specification.