Full Technical Specifications of the Rigid and Flexible PVC Co-Extrusion Profile
Every value below is production-verified on Dachang's co-extrusion lines. Check the profile against your load, sealing and environmental envelope before you commit to tooling, and tell us which numbers are critical so we hold them tightest where it counts.
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Profile - General |
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|---|---|
| Material construction | Rigid PVC (UPVC) + flexible PVC, co-extruded - single part |
| Extrusion type | Dual-extrusion · tri-extrusion available |
| Flexible durometer | Shore A 50 – Shore A 90 |
| Color | Single-color or dual-color - co-extruded, no painting |
| Cross-section width | 5 mm – 500 mm |
| Cut length | To specification · max 10 m per length |
| Dimensional tolerance | ±0.15 mm critical · ±0.25 mm non-critical · ±0.10 mm precision |
| Rigid PVC (UPVC) - Structural Section | |
|---|---|
| Tensile strength | 40–60 MPa |
| Flexural modulus | 2.4–4.1 GPa |
| Heat deflection temp. | 65–75 °C |
| Density | 1.3–1.45 g/cm³ |
| Flame rating | Self-extinguishing (V-0) |
| Flexible PVC - Sealing Section | |
|---|---|
| Hardness | Shore A 50–90 |
| Elongation at break | 200–400 % |
| Compression set | 15–35 % |
| Operating temperature | −20 °C to +60 °C |
| Chemical resistance | Excellent - oils, acids, alkalis |
How Dachang's Dual-Durometer PVC Co-Extrusion Profile Fuses a Rigid Core to a Flexible Seal
A rigid and flexible PVC co-extrusion profile does two jobs on one line. The rigid UPVC section holds structure and dimension; the flexible PVC section seals, cushions or grips. Because both compounds meet and fuse inside a single die, the finished profile replaces a hard part plus a separately fitted gasket, which is exactly why sourcing teams move to co-extrusion instead of assembled, hard-soft alternatives. It takes a whole step off the line, not just a component off the drawing.
That is the part Dachang builds. The bond forms at the molecular level as the two melts cool together, so the flexible seal cannot be pulled, peeled or vibrated away from the rigid body. If a profile reaches you today as a hard channel with a gasket glued or clipped in afterward, the same geometry can arrive as a single co-extruded PVC profile with the seal already permanently in place, and one line on your bill of materials where there used to be two.
Why Project Buyers Choose Dachang's Wholesale Rigid and Flexible PVC Co-Extrusion Profiles
The value here is not the process, it is what the process takes off your line and out of your bill of materials. This is what buyers actually gain when they order these co-extruded profiles from Dachang in volume.
Seal is built in, not fitted
The flexible seal is co-extruded onto the rigid core in the same die pass. Gasket insertion, adhesive application, and clip-fastening drop out of your assembly sequence entirely.
For your line: one fewer station, one fewer purchased gasket SKU, and no seal-adhesion rework downstream.
Bond outlasts adhesives and clips
Rigid and flexible sections fuse as they cool rather than being mechanically joined. The connection resists separation under thermal cycling, vibration, and compression across the part's service life.
For your line: the field failure that generates the most seal-related returns - gasket pull-out - is designed out.
Fewer components, lower landed cost
Consolidating a rigid part and its gasket into one co-extruded PVC profile cuts part count, inventory lines, and assembly labor. Multi-component assemblies commonly land 30–40% higher on total cost.
For your line: a single line item on the BOM replaces two, with one lead time and one incoming inspection.
Tuned hardness where you need it
Process control places soft Shore A 50 sealing lips and semi-rigid Shore A 90 elements exactly within the cross-section, bonded to the rigid UPVC base - no compromise between grip and structure.
For your line: one profile handles both the sealing surface and the mounting geometry your fixture already expects.
Consistent seal position, every length
Unlike hand-fitted gaskets, co-extrusion holds the flexible-to-rigid position and bond quality across the entire production run, so part 5,000 seals like part 1.
For your line: predictable fit at assembly with no per-part gasket-seating adjustment.
Compliance built into the material
The rigid section is inherently self-extinguishing (V-0) and the flexible section resists oils, acids, and alkalis - sealing performance holds where cleaning chemicals or fire-safety rules apply.
For your line: fewer material-substitution questions during specification sign-off and audits.
How Dachang Engineers a Reliable Rigid-to-Flexible Bond in Every Co-Extrusion Profile
A dependable rigid-to-flexible bond is a material-pairing problem, not a die problem alone. Three things decide whether the flexible seal stays married to the rigid core for the life of the part, and Dachang keeps all three under its own roof.
Matched compounds, developed in-house
Rigid and flexible PVC compounds only bond cleanly when their processing temperatures and melt viscosities are compatible. Dachang pairs the formulas in its own granule-processing department, so the two melts fuse instead of delaminating at the interface.
For your part: the interface is engineered before the die is cut - not diagnosed after a failed trial.
Dies that place each material precisely
A co-extrusion die must steer the rigid melt to the structural zone and the flexible melt to the sealing zone within one cross-section. Tooling is designed and cut in-house for each custom profile.
For your part: geometry changes route through one shop, shortening the design-to-sample loop.
Process balanced across both extruders
Temperature, pressure, and line speed are held in balance across the two extruders so material distribution and bond strength stay constant through the run. Durometer is placed from soft Shore A 50 lips to semi-rigid Shore A 90 elements as the design requires.
For your part: the hardness on the drawing is the hardness on the profile, length after length.
Why PVC over the alternatives
Against TPE/ABS pairings, PVC adds chemical resistance and V-0 flame safety at lower cost. Against EPDM/aluminum, all-PVC is lighter, has no galvanic corrosion, and recycles in one stream. Against silicone/PC, PVC seals comparably for most industrial duty at 40–60% less material cost.
For your part: a defensible material choice on cost-sensitive, high-volume programs.
Where Rigid and Flexible PVC Co-Extrusion Profiles Work: Construction, Automotive, Marine and Retail Projects
Every application below pairs a rigid mounting or structural zone with a flexible sealing, gripping or cushioning zone, which is the exact geometry co-extrusion is built to deliver in one part. Dachang already ships project-ready co-extruded PVC profiles into each of these industries.
Construction & building
The largest market for co-extruded PVC profiles.
- Glazing beads - rigid core, flexible sealing lip, glass 4–24 mm
- Curtain-wall profiles with integrated weather seals
- Expansion-joint covers accommodating ±25 mm thermal movement
- Cable trunking with rigid body and flexible snap-fit cover
Automotive & transportation
Sealing and trim across interior and exterior.
- Door-seal carriers with multiple flexible sealing bulbs
- Interior trim - rigid base, soft-touch flexible surface
- Glass-run channels with low-friction flexible liners
- Bumper inserts absorbing impact on rigid mounts
Marine & outdoor
Built for salt water, UV, and temperature swings.
- Boat rub rails - rigid base, flexible bumper
- Hatch and porthole weather-sealing gaskets
- Non-slip flexible deck trim over rigid cores
Retail display & POP
Structure plus tool-free gripping.
- Price-tag holders - rigid mount, flexible gripper
- Shelf-edge profiles holding promotional graphics
- Display frames with flexible corner connections
Furniture & cabinetry
Quiet closure and clean edges.
- Cabinet door seals - rigid clip, flexible sealing surface
- T-molding and edge banding with flexible cover
- Drawer profiles with rigid track and flexible guide
Live-hinge integration
Flexible hinges co-extruded into the profile flex through repeated open/close cycles without fatigue failure - one part where a hinged assembly used to sit.
Custom OEM Manufacturing of Rigid and Flexible PVC Co-Extrusion Profiles by Dachang
Send a drawing, a physical sample or a target cross-section. Here is how Dachang takes a custom co-extruded PVC profile from your specification to a validated production part, with tooling and compounds handled under one roof.
What we build to your spec
- Dual & tri-extrusion - two or three compounds fused in one profile
- Shore A 50–90 flexible durometer placed exactly where the design calls for it
- Single or dual color - color-matched rigid and contrasting flexible sections, no secondary finishing
- Live-hinge geometry engineered into the cross-section
- Up to 500 mm co-extruded cross-section width
How the program runs
- In-house tooling shop designs and cuts the co-extrusion die - faster iteration than outsourced die making
- Matched compounds formulated in our own granule department for bond compatibility
- Color matching to Pantone, RAL, or a physical sample in our color lab
- Trial runs of 500–1,000 m validate the design before full production
- Tooling in 2–3 weeks; complex multi-zone profiles may add time
Testing, Certification and Bond Control Behind Every Dachang Co-Extrusion Profile
Documentation clears specification sign-off and audits, and process monitoring keeps the rigid-to-flexible bond consistent from the first meter to the last. Tell us what your quality team needs and Dachang sends it with the order.
Documentation on request
RoHS compliance documentation, REACH compliance statements, and material data sheets ship with the order. Third-party test reports are available for specific properties - flammability rating, UV resistance, or food-contact compliance.
For procurement: the paperwork your quality team needs to release the part, supplied up front.
Bond consistency, monitored
Bond strength depends on matched formulations, tight temperature control, and correctly designed dies. Process-monitoring systems track the key parameters so bond quality holds constant from the first meter to the last.
For procurement: sampling risk on the seal interface drops - the variable is controlled at the line, not caught at inspection.
Packaging and Bulk-Order Shipping for Rigid and Flexible PVC Co-Extrusion Profiles
PE bag + carton
Standard export packing for co-extruded PVC profiles
Max 10 m
Cut length per profile, or to your specification
2–3 weeks
Production lead time after approval
400 t / mo
Factory PVC profile capacity for volume schedules
Post-industrial scrap is reground and reprocessed, and the rigid and flexible PVC sections run together in most PVC recycling streams, so Dachang can supply recyclability documentation for your sustainability reporting.
Products Description
5,000 m
Standard MOQ for custom co-extruded PVC profiles
500–1,000 m
Trial quantity for tooling & design validation
2–3 weeks
Tooling development, including die and trial runs
+1 week
Added time for custom-color compound preparation
The trial run exists so you can prove geometry, durometer placement, and bond before committing to a full production order. Standard colors ship on the 2–3 week cycle; custom colors add roughly one week for compound preparation.
Rigid and Flexible PVC Co-Extrusion Profiles in the Field
Dachang, Your Factory-Direct PVC Co-Extrusion Profile Manufacturer and Supplier
Dachang is a dedicated PVC co-extrusion profile manufacturer and OEM supplier, running rigid-and-flexible dual-extruder lines from a 15,000 m² factory in Dongguan, China. Die-making and compound formulation stay in-house rather than going out to subcontractors, and that is what keeps the bond reliable and the lead times short.
40+
Extrusion lines
Dedicated capacity for rigid, flexible, and co-extruded PVC profiles under one roof.
400t
Monthly capacity
Volume headroom to hold schedule on large and repeat co-extrusion orders.
2–3wk
In-house tooling
Own tooling shop cuts co-extrusion dies and samples on a tight iteration loop.
1
Compound department
Matched rigid/flexible PVC formulas developed in-house for reliable bonding.
Procurement Questions About Rigid and Flexible PVC Co-Extrusion Profiles
Q: What MOQ applies to a custom rigid and flexible PVC co-extrusion profile?
A: Standard MOQ for custom co-extruded PVC profiles is 5,000 meters. For tooling development and sampling, Dachang, as a PVC co-extrusion profile manufacturer, can run smaller trial quantities of 500–1,000 meters to validate the design before you commit to full production.
Q: How long does tooling take for a new co-extruded PVC profile?
A: Typical tooling development runs 2–3 weeks, covering die design, manufacturing, and trial runs. Because the tooling shop is in-house, iteration is faster than outsourced die making; profiles with multiple material zones may need additional time.
Q: What tolerances can you hold on co-extruded profile dimensions?
A: Standard tolerances are ±0.15 mm on critical dimensions and ±0.25 mm on non-critical features. Tighter tolerances to ±0.10 mm are achievable for precision applications with the right tooling design and process controls.
Q: What is the maximum width you can co-extrude?
A: Co-extrusion lines produce profiles up to 500 mm in cross-sectional width. Larger profiles need specialized tooling and process parameters - the engineering team will confirm feasibility for wide-format co-extrusions against your drawing.
Q: How do you keep the rigid-to-flexible bond consistent across a run?
A: Bond consistency comes from matched compound formulations, precise temperature control, and correctly designed co-extrusion dies. Dachang, as a co-extruded PVC profile supplier with an in-house compound department, uses PVC formulations developed specifically for co-extrusion compatibility, with process monitoring tracking bond-critical parameters throughout production.
Q: Can you match specific colors for the rigid and flexible sections?
A: Yes - full color matching is available for both sections against Pantone references, RAL numbers, or a physical sample. Standard colors ship on the 2–3 week cycle; custom colors add about one week for compound preparation.
Q: Do you provide material certifications and test reports?
A: Material certifications include RoHS compliance documentation, REACH compliance statements, and material data sheets. On request, Dachang, as a PVC co-extrusion profile manufacturer, supplies third-party test reports for properties such as flammability rating, UV resistance, or food-contact compliance.
Request a Quote from Dachang, a Dedicated PVC Co-Extrusion Profile Manufacturer
Send a drawing, a target cross-section, or a physical sample. Dachang quotes co-extruded PVC profiles factory-direct - include your durometer, width, and annual volume and you'll get a price with tooling lead time.