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Chlorinated nitrile gloves are surface-treated with chlorine to reduce tackiness and improve donning, while polymer-coated nitrile gloves use a thin polymer layer (usually polyurethane or silicone) for the same purpose; polymer-coated gloves keep the original surface chemistry intact and suit cleanroom and electronics work, whereas chlorinated gloves cost less but can yellow, carry chlorine odor, and shorten shelf life. Why does the donning surface matter? During manufacturing, nitrile rubber gloves emerge sticky. Without a donning treatment, powdered gloves would be the historical fix, but powder-free regulation and sample-integrity requirements have made surface treatment the industry default. The two treatment routes define a real procurement choice that affects shelf life, cleanroom suitability and unit cost - a choice that matters more when raw-material prices are elevated (Brent above 103 USD/bbl as of 12 October 2026; Data sources:生意社 (SunSirs) Brent benchmark 104.72 USD/bbl, 2026-10-12; ICE Brent intraday ~103.3-103.8 USD/bbl, 2026-10-12.). Side-by-Side Comparison Attribute Chlorinated nitrile gloves Polymer-coated nitrile gloves Process Chlorine gas or hypochlorite bath after curing Polyurethane or silicone coating applied to inner surface Donning feel Slippery, slightly stiff surface Smooth, low-friction, surface stays soft Surface integrity Oxidizes surface layer; possible yellowing Original polymer surface preserved Odor May retain chlorine smell Essentially odorless Shelf life impact Treatment can accelerate surface aging No chemical aging of surface Cleanroom / electronics fit Not preferred (particle and ion residues) Preferred for low-residue environments Food contact Generally acceptable; verify food-contact declaration Verify coating is food-contact compliant Relative cost Lower Slightly higher How to Decide Choose chlorinated gloves for general industrial, janitorial and high-volume exam applications where cost per box dominates and yellowing or mild odor is acceptable. Choose polymer-coated gloves when the product touches sensitive surfaces: cleanrooms, optics, electronics assembly, diagnostics and any process where chloride residues would cause defects. For medical examination use, both routes must still meet EN 455 or ASTM D6319 physical requirements - the treatment does not replace certification. Verification Steps for Buyers Ask the supplier which treatment route is used and request the process description in the TDS.  Request accelerated-aging data per EN 455-4 for the specific treatment, not just the base film. For cleanroom use, demand particle and extractable-ion test reports. On receipt, inspect for yellowing and sniff-test a random sample from each lot; reject lots with strong chlorine odor. Source note: process descriptions follow standard nitrile glove manufacturing literature (Intco, HANVO technical documentation); certification references follow EN 455 and ASTM D6319 as published. FAQ Q: What is the difference between chlorinated and polymer-coated gloves? A: Chlorinated gloves are treated with chlorine to lower surface tack, while polymer-coated gloves receive a polyurethane or silicone inner layer. Polymer-coated versions preserve the original surface and suit cleanrooms; chlorinated versions cost less but may yellow and shorten shelf life. Q: Are chlorinated gloves worse for cleanrooms? A: Yes, generally. Chlorination can leave oxidized surface residues and chloride ions, so polymer-coated nitrile is the preferred choice in cleanroom and electronics environments. Q: Does chlorine treatment affect glove certification? A: No. Both treatments must still meet EN 455 or ASTM D6319 physical requirements such as >= 14 MPa tensile strength before and after aging; the treatment only changes the surface, not the certification path. Q: Why do chlorinated gloves sometimes smell? A: Residual chlorine from the treatment bath can remain trapped in the film and cause a swimming-pool-like odor; strong odor in a fresh lot is a reason to reject it. Q: Which type lasts longer in storage? A: Polymer-coated gloves usually age better because chlorination oxidizes the surface layer and can accelerate surface degradation over the stated shelf life.