Antistatic gloves and process for making same
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example 1
Comparative Static Testing of Gloves
[0040]Three types of glove samples were tested for static resistance properties and compared. The gloves were composed of:
[0041]1) 100% natural rubber;
[0042]2) 100% nitrile rubber; and
[0043]3) two layers, the outermost layer comprising 80% nitrile rubber and 20% natural rubber, laminated directly to an innermost layer comprising 80% natural rubber and 20% nitrile rubber prepared using the process described below.
[0044]For the two-layered glove, one glove sample was tested for static resistance properties. For 100% nitrile rubber gloves, eight different commercially available gloves and six different lab dipped gloves were each tested for static resistance properties (see Table 1). For 100% natural rubber gloves, different gloves were tested for static resistance properties. Each glove sample was tested for surface resistivity, volume resistivity and static decay time (SDT) as set forth above. For each glove sample, three specimens (prepared from t...
examples 2-6
Detailed Preparation of Gloves
[0050]The method 100 used in preparing examples 2-7, comprises:[0051](1) preparing a latex composition composed of a majority of nitrile rubber for a first layer and a latex composition composed of a majority of natural rubber for a second layer,[0052](2) dipping and forming the gloves 200, and[0053](3) chlorinating the gloves 300 and making powder-free clean room gloves.
Preparation of Latex Compounds
[0054]Two latex compositions were prepared and blended, each comprising a nitrile rubber latex and a natural rubber latex. A first latex composition included a majority of a nitrile rubber latex and formed a first layer, the outer layer, of the antistatic glove. A second latex composition included a majority a natural rubber latex and formed a second layer, the inner donning side, of the antistatic glove.
First Latex Composition
[0055]Raw nitrile rubber latex (composed of about 39% acrylonitrile, about 58% butadiene, and about 3% carboxylic acid) was stirred ...
example 2
[0066]A multilayer nitrile / natural rubber latex laminate glove with an outer layer comprising 100% nitrile rubber latex and an inner layer comprising 100% natural rubber latex was prepared in a manner similar to the procedures described above. The first latex composition comprised 100% nitrile rubber latex (and 0% natural rubber latex) and the second latex composition comprised 100% natural rubber latex (and 0% nitrile rubber latex). This particular glove showed delamination of the two layers immediately after heat curing in the oven.
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