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Oct . 17, 2025 11:05 Back to list

PVC Square Rod – Rigid, Machinable, Chemical Resistant


Square PVC rods: the quiet workhorse in fixtures and fabrication

If you’re sourcing a PVC square rod, here’s the honest rundown from the shop floor to the lab. These profiles aren’t flashy—but in jigs, chemical plant supports, and electrical isolation blocks, they’re often the part that just works. The model I reviewed comes out of No.316 Pingan West Street, Shunping County, Baoding City, Hebei, China 072250, and, to be honest, the machining behavior surprised me: clean edges, low chatter, and predictable dimensional stability.

PVC Square Rod – Rigid, Machinable, Chemical Resistant

What’s trending in rigid PVC profiles

Three shifts I keep seeing: tighter tolerance extrusion (Cpk-driven), a steady move to Ca-Zn stabilizers (goodbye lead), and small-batch custom colors for brand-harmonized installations. Also, more requests for traceable lots and RoHS/REACH declarations. It seems maintenance teams want fewer surprises and better paperwork.

Core specs at a glance

Property Typical value Test method Notes
Size 10×10 mm (others on request) — Length: any; surface: smooth
Specific gravity 1.45–1.50 g/cm³ ISO 1183-1 Compound dependent
Tensile strength ≈ 45–55 MPa ISO 527-2 Room temperature, dry
Flexural modulus ≈ 2.4–3.0 GPa ISO 178 Real-world use may vary
Vicat softening ≈ 75–85 °C ISO 306 Method B50
Dielectric strength ≈ 10–20 kV/mm IEC 60243 Insulation spacers, busbar standoffs
Flammability Often UL 94 V-0 (formulation-dependent) UL 94 Confirm per lot
Colors Dark grey RAL7011, black, white, custom — Brand-matched colors available

Process flow and QA

Materials: PVC resin (ASTM D1784 compound), Ca-Zn stabilizers, lubricants, pigments. Methods: dry blending → twin-screw extrusion through square die → calibrated water-bath cooling → haul-off → cut-to-length → conditioning. QA: density (ISO 1183), dimensions (±0.2–0.3 mm typical), tensile (ISO 527), impact (ISO 179), hardness (ISO 868). Service life: indoors ≈ 10–15 years; outdoors ≈ 2–5 years (extend with UV-stabilized grades). Certifications: ISO 9001 manufacturing; RoHS/REACH declarations on request.

Where a PVC square rod fits best

  • Corrosion-resistant supports in water treatment skids
  • Electrical isolation blocks and non-conductive spacers
  • Jigs/fixtures for light machining; inspection gauges
  • Lab furniture frames and splash-zone components

One shop foreman told me their CNCs “treat PVC square rod like a friendly aluminum”—good chip control, minimal tool wear. Another maintenance lead liked that parts could be solvent-welded in a pinch.

Customization

Profiles beyond 10×10 mm? Sure—common asks are 12×12, 20×20, and 25×25 mm. Color-matched RAL shades, close-tolerance grinding, pre-drilled holes, and cut-to-length kitting are increasingly popular. For food-contact or flame-rated builds, specify the standard upfront so the compound is dialed accordingly.

Vendor snapshot (indicative)

Vendor Lead time Color range Certs/Docs MOQ
Lida Plastic (PVC square rod) ≈ 7–15 days RAL7011, black, white, custom ISO 9001; RoHS/REACH on request As quoted; varies by color
Generic importer ≈ 30–45 days Limited stock colors Basic CoC Carton-based
Local distributor ≈ 2–7 days (stock) Black/white mostly Material data sheet Per length

Quick case notes

• A Midwest machine shop swapped aluminum spacers for PVC square rod in coolant splash zones—no corrosion, 18% cost reduction, zero rework across six months. • A water-treatment OEM used dark grey RAL7011 PVC square rod as pump base shims; dielectric properties improved isolation and inspection teams liked the color contrast.

Bottom line

For chemically tough, electrically insulating, and easy-to-machine square stock, PVC square rod is a smart default. Just specify the standard, color, and tolerance up front—and ask for test data tied to your lot.

References

  1. ASTM D1784: Rigid PVC compounds
  2. ISO 527-2: Plastics—Tensile properties
  3. ISO 178: Plastics—Flexural properties
  4. UL 94: Flammability of plastic materials
  5. ISO 306: Vicat softening temperature
  6. ECHA REACH Regulation

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