Why material knowledge is essential
Choosing a glove material is not merely a question of price. The material determines:
- Chemical resistance (what the glove holds out)
- Allergy risk (for the user and patient)
- Mechanical strength and fit
- Regulatory suitability (medical, PPE, food contact)
A sales representative or buyer who does not know the materials cannot advise correctly on product selection.
Latex (natural rubber latex, NRL)
Latex is produced from the sap of the *Hevea brasiliensis* tree and has for decades been the gold standard for surgical gloves.
Advantages:
- Superior elasticity and tactile sensitivity
- High barrier integrity even under stretch
- Good fit and comfort for precision work
Allergy issue:
Latex gloves contain natural proteins – primarily Hev b 1, 3, 5 and 6 – which can sensitise the immune system and trigger Type I allergy (IgE-mediated). In the 1990s, latex allergy reached epidemic levels in healthcare, driven by powdered gloves that spread the allergen as aerosol.
Powdered vs. powder-free:
- Powder (cornstarch) is used as a lubricant but binds latex proteins and disperses them into the air
- EU member states progressively prohibited powdered medical gloves from around 2016–2017 following SCENIHR recommendations; today all medical latex gloves on the EU market are powder-free
- Today all medical latex gloves on the EU market are powder-free
Commercial perspective:
Latex has not disappeared, but its market share has declined sharply. The primary market is surgical gloves and specialist settings requiring high tactile feedback. For examination/procedure use, nitrile is the dominant choice.
Nitrile (NBR – Nitrile Butadiene Rubber)
Nitrile is today the most widely sold glove material in Europe for medical and industrial use.
Chemical background:
NBR is a synthetic rubber produced by copolymerisation of acrylonitrile and butadiene. The acrylonitrile content (typically 28–33 %) determines chemical resistance: higher ACN content = better oil resistance but lower elasticity.
Advantages:
- No natural latex proteins → no Type I allergy risk
- Good resistance to fats, oils and many chemicals
- Good mechanical strength and durability
Vulcanisation and accelerators:
Standard nitrile vulcanisation uses sulphur-based chemicals – thiurams, dithiocarbamates and mercaptobenzothiazole (MBT) – which remain in the finished glove and can trigger Type IV allergy (allergic contact dermatitis, ACD). See Module 3 (EN 455-5) and Module 7 for details.
Resistance profile:
Nitrile is strong against: acids, bases, aldehydes and many solvents.
Weak against: ketones (acetone), certain aromatic and halogenated solvents.
Accelerator-free nitrile – the growing premium category
Accelerator-free nitrile vulcanisation avoids the classic sulphur-based accelerators. Instead it uses:
- Metal oxide-based vulcanisation (e.g. zinc oxide)
- Electron beam curing (e-beam, no chemical additives)
- Alternative crosslinking without thiurams/dithiocarbamates
Advantages:
- Eliminates the primary cause of Type IV allergy from gloves
- Required by many hospitals and in healthcare procurement frameworks
- Can be documented under EN 455-5 (chemical testing)
Commercial consideration:
Accelerator-free gloves typically cost 15–40 % more than standard nitrile. The price premium can be justified by reduced allergy investigations, sick leave and legal liability. It is a strong selling point in hospital procurement.
Vinyl (PVC – Polyvinyl Chloride)
Vinyl is made from polyvinyl chloride blended with plasticisers.
Plasticisers and REACH:
Classic phthalate plasticisers (DEHP, DBP, BBP) are SVHC substances under REACH and prohibited in medical use. Modern vinyl gloves use alternative plasticisers (DINP, DIDP, DOTP), but these are under ongoing REACH assessment.
Limitations:
- Lower elasticity than latex and nitrile → poorer fit and increased risk of micro-leakage during movement
- Weaker mechanical barrier integrity compared to nitrile
- Inferior chemical resistance
Strengths:
- Lower price per glove
- Suitable for short-duration, low-risk tasks (e.g. food dispensing, equipment cleaning)
- Free of latex proteins and typically accelerator-free (PVC is not vulcanised)
Typical purchasing mistake:
Choosing vinyl for procedure use because it is cheaper – without accounting for the increased leakage risk. Vinyl should not be used for invasive procedures.
Polyisoprene (synthetic latex)
Polyisoprene is a synthetic version of natural latex – same chemical structure, no biological proteins.
Application:
- Primarily surgical gloves for latex-allergic individuals who want latex-like properties
- Still requires accelerators in vulcanisation (unless an accelerator-free version is used)
Advantages:
- No Hev b proteins → no Type I allergy risk
- Superior elasticity and tactile sensitivity compared to nitrile
- Preferred for microsurgery and orthopaedic surgery
Price:
Polyisoprene is significantly more expensive than nitrile and latex, and occupies a small niche in the market.
Neoprene (polychloroprene)
Neoprene is a synthetic elastomer with a particular chemical profile.
Advantages:
- Superior resistance to strong acids, bases and many organic solvents
- Good heat resistance
Application:
- Used primarily in chemical protection (PPE context)
- Rare in disposable gloves for medical use
TPE / PE – ultra-low segment
TPE (thermoplastic elastomer) and PE (polyethylene) gloves are the cheapest category.
Properties:
- Extremely low price and weight
- No barrier integrity for demanding tasks
- Primarily for very short-duration, low-risk tasks (checkout assistant, quick food service)
Must not be used for: invasive procedures, chemicals or biological material.
Thickness and wall thickness – what counts in practice?
Thickness is expressed in millimetres and is not the only indicator of barrier quality:
| Parameter | What it tells you |
|---|---|
| Nominal thickness | Marketed thickness (may be an average) |
| AQL (EN 455-1) | Statistical measure of holes in a batch |
| Force at break (EN 455-2) | Force to rupture – measure of mechanical integrity |
| Breakthrough time | Chemical resistance (EN ISO 374-1) |
A thin nitrile glove with good AQL and force at break can provide better barrier than a thick vinyl glove.
Comparison table
| Material | Type I allergy risk | Type IV allergy risk | Chemical resistance | Relative price |
|---|---|---|---|---|
| Latex (powder-free) | High (Hev b) | Possible (accelerators) | Good | Medium |
| Standard nitrile | None | Possible (accelerators) | Good–high | Low–medium |
| Accelerator-free nitrile | None | Minimal | Good–high | High |
| Vinyl (PVC) | None | None | Low | Very low |
| Polyisoprene | None | Possible | Good | Very high |
| Neoprene | None | Possible | Very high | High |
| TPE/PE | None | None | Very low | Very low |
Common purchasing mistakes – and how to avoid them
1. "One glove for everything"
An examination glove is not a chemical glove. Always match the product choice with documented testing for the specific risk.
2. "Cheapest is best"
Price per glove is irrelevant without factoring in consumption (change frequency), allergy investigations and documentation requirements.
3. Choosing without documentation
Always ask for: CE declaration, relevant standard reference (EN 455/EN ISO 374), test reports and accelerator status.
4. Ignoring the accelerator profile
In units with known allergy patients or healthcare workers under allergy investigation, accelerator-free gloves are the only responsible choice.
5. The powder mistake
Powdered gloves are prohibited for medical use in the EU since 2017. If you still find them in a catalogue, it is a compliance warning sign.