Natural Rubber Latex (Latex)
Historically the most common material for gloves due to its durability, comfort, and dexterity. Latex is ideal when high dexterity and tactile sensitivity is necessary. It provides excellent protection against contamination and chemicals such as acids, alcohols and ketones. In some people, latex proteins may cause an allergic reaction for which nitrile gloves provide a good alternative.
Known for its inherent cleanliness (low in both particles and ionic extractable), ESD properties, and low cost. these attributes make vinyl gloves ideal for use in medical device manufacturing, microelectronics, and other similar dry controlled environments. a PVC glove fit looser on an operator's hand than latex or nitrile, which can reduce dexterity.
Acrylonitrile Butadiene Rubber (Nitrile)
This material offers good dexterity and superior resistance to many types of chemicals compared to latex, nitrile is lower in particles, ionic extractable and non-volatile residues (NVR). Nitrile also has "memory" properties that adapt it to the hand for a more custom fit that reduces fatigue. It is three times puncture resistant than latex, and it also provides protection against cutting and scraping. Static-dissipative properties make nitrile ideal for all static sensitive environments.
Five Glove Selection Criteria
Numbers of particulate matter (contaminants) that comes off the gloves, typically measured in a dry test. Nitrile has the lowest amount of particles, followed by PVC, and latex has the highest particle count.
The amount of elements extracted from the gloves in an immersion test, generally measured in Parts Per Billion (PPB) or Grams per Square Meter (g/m2). 18 mega ohm DI H2O washed nitrile has the lowest ionic counts, followed by PVC and latex.
Electrostatic Discharge (ESD) Properties
The capacity of a glove to dissipate, or conduct a static charge to a ground. Both PVC and nitrile exhibit excellent ESD qualities. Latex is insulative.
Latex gloves fit tight on the hand, but have no "memory" to conform to a specific hand shape. Nitrile's memory (modulus) properties provide more comfort, but are lower in elasticity than latex. PVC has much lower dexterity and is recommended when tactile requirements are low.
Latex is a good choice for protection against acids. Nitrile has better resistance than latex to a broad range of chemicals and performs well with solvents and acids. PVC has poor acid and solvent based resistance and is best suited for a dry environment. note: Thin-walled gloves are only intended for a splash protection.
Gloves Sizing Chart - How to select the right glove size?
To find your glove size, measure (in inches) around your palm indicated by picture A. Valutek indicates glove sizes by letter (XS, SM, MD, LG, XL, XXL), use the table below to find the equivalent translation.
Choose the letter size from the chart that is the closest to the number you measured. For example: if as a woman, your hand measures 7¾”, then choose a size “L”.
To determine the correct glove length you need, measure from the tip of the middle finger to where the cuff edge should be on forearm as shown in Picture B, then select the proper cuff and length.
Valutek offers three cuff lengths: 9”, 9.5” and 12”. The longer the length, the more added protection to your products.
Nitrile has only been on the scene as a clean and reliable choice for cleanroom operators for the past decade. While Latex is made from organic tree sap and contains allergy-causing proteins recognized by the FDA, Nitrile is manufactured from a 100% inorganic synthetic material. Nitrile gloves provide superior barrier protection, minimize the risk of allergic reactions and possess excellent electrostatic discharge (ESD) properties. Nitrile is presently the best choice for operator comfort due to its remarkable memory-membrane. This feature allows a nitrile glove to adapt to each individual’s hand, improving motion and minimizing fatigue.
Glove Donning Procedure
It only takes one uncleaned hand to contaminate the entire critical environment, follow proper glove donning procedure to minimize cross-contamination, and to keep your process contaminant free.
Step 1: Wash hands thoroughly and dry
Step 2: Pick the first glove out from the dispenser by grabbing the beaded cuff of the glove.
Step 3: Don the first glove by sliding onehand in while holding the cuff with the other hand.
Step 4: Adjust the fitness of the glove only by contacting the cuff, avoid touching elsewhere.
Step 5: Don second glove by using the gloved hand to pick up the cuff, repeat step 3 and 4.
Step 6: If double donning is desired, respeat step 2 to 5 with a second set of gloves after apparel gowning.
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