Inside the supply chain of welding curtain manufacturers

I’ve toured more than a dozen PVC extrusion lines over the years, from Langfang to Łódź. Patterns repeat: buyers want clearer specs, faster customization, and proof—actual test data—that a curtain won’t cloud, crack, or let through the wrong wavelengths. To be honest, it’s the kind of boring detail that saves skin and eyes in real shops.

Industry trends I keep seeing

• More ISO 25980 (ex-EN 1598) demand for welding screens; auditors are asking for traceable batch tests.
• Shift to ribbed profiles for durability in high-traffic bays; fewer scratches, better clarity over time.
• Sustainability pressure: low-odor plasticizers, RoHS/REACH statements, and recycled-content track-and-trace (still maturing).
• Shorter MOQs on custom tints (green, bronze) and widths for lean cell layouts.

Materials and process (how the sausage is made)

Manufacturers blend PVC resin with plasticizers, UV/IR absorbers, stabilizers, and pigments. Extrusion or calendering sets thickness, then optional ribbing is rolled in. Good plants log melt temperature, line speed, and die pressure; the better ones run in-line haze and thickness gauges. For welding-grade sheets, the additive package targets UV/blue-light attenuation per ISO 25980; for freezer curtains, the recipe prioritizes low-temperature flexibility.

Product spotlight: Double Ribbed Colour Transparent Soft Door Curtain

Origin: Houligezhuang Village, Langfang, Hebei, China. Brand: WANMAO. I’ve seen similar lines in Hebei; output is consistent when they keep the chill rolls clean—sounds trivial, matters a lot.

Note: For welding bays, request ISO 25980-compliant tinted PVC with UV/IR absorbents; freezer-grade is for cold rooms, not arcs.

Testing, service life, certifications

• Welding screens: ISO 25980 transmission tests; request spectral data 200–780 nm.
• Tensile/elongation: ASTM D638 or ISO 527—helps estimate tear resistance at hang points.
• Haze/clarity: ASTM D1003; ribbed versions maintain clarity longer under abrasion.
• Flammability: UL 94 HB/V-2 declarations (varies by formulation—ask for reports).
• Typical service life: around 3–5 years in indoor shops; UV, heat, and slag reduce that.

Quick vendor comparison

Applications, customization, and a quick case

Applications: fab shops, automotive cells, shipyards, vocational schools; cold rooms in food plants (different spec). Customization usually spans tint, thickness, rib profile, grommet/hook spacing, and width sets for overlapping slats. One Midwest metal shop told me they split a bay: ISO 25980 green screens around weld cells, ribbed clear PVC on the forklift path. Downtime dropped because the ribbed lanes resisted scuffing.

Many customers say ordering is smoother when welding curtain manufacturers share CoAs and spectral plots upfront. Actually, a simple checklist—thickness, tint, standard, edge hardware—prevents most oops moments.

Bottom line

If you’re screening arcs, specify ISO 25980-compliant PVC and get the lab data. For freezers or doorways, ribbed transparent curtains like WANMAO’s keep traffic moving and wear slower than flat sheets. Different jobs, different chemistries—don’t mix them up, even if welding curtain manufacturers and cold-room suppliers sometimes sit under the same roof.

Authoritative citations

1. ISO 25980: Health and safety in welding — Transparent welding curtains, strips and screens.
2. OSHA 29 CFR 1910.252: Welding, cutting, and brazing safety requirements.
3. ASTM D1003: Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics.
4. ASTM D638 / ISO 527: Tensile properties of plastics.
5. REACH and RoHS compliance guidance for plasticized PVC, ECHA publications.