防护手套EN420标准一般要求和测试方法

防护手套CE认证EN420标准

防护手套出口到欧盟销售是要做EN420标准测试的，下面小编就简单介绍一下EN420标准一般要求和测试方法等内容，大家可以做一个参考。

EN 420: 2003 + A1: 2009

Protective gloves. General requirements and test methods

EN 4202003 + A12009

防护手套EN420标准一般要求和测试方法

This standard is designed to ensure that the gloves themselves do not cause harm to the wearer and are comfortable to wear. Tests and requirements include the pH and chrome VI content of leather plus water vapour transmission and absorption of materials. Also procedures to examine the sizing of the glove and its effect on finger dexterity are covered plus general requirements for the information to be supplied with and marked on the glove.

该标准旨在确保手套本身不会对佩戴者造成伤害，而且佩戴舒适。测试和要求包括皮革的pH和六价铬含量，以及材料的水汽传输和吸收性能。此外，还包括检查手套尺寸及其对手指灵活性的影响，以及手套标示和随附信息的一般要求。

Length 长度 

The length of the glove is measured by suspending it from the middle finger with a graduated rule having a rounded tip designed to fit the tip of the finger. The glove is manipulated to remove any wrinkles or   folds and the minimum length is recorded. EN 420 includes a list of minimum lengths for each glove size, however, gloves for special purpose are permitted to be below the minimum length but in such situations the manufacturer must demonstrate that they are fit for special purpose by a statement in the user instructions.

专门用于测量手套长度的量尺为圆柱形，一端为圆形，以配合手套指尖的形状。将手套中指套在量尺上垂直悬挂，可以测得其长度。测量时，要整理手套，不得有任何皱纹或折叠，记录*小长度。EN 420中列出了每种手套尺码的*小长度，不过，对于特殊用途的手套，允许低于*小长度，但在这种情况下，制造商必须在使用说明书中声明它们的特殊用途。

Sizing / Dexterity 尺码/ 灵巧性

Gloves are fitted on a hand of the size that they are intended to fit and comments are made regarding comfort and fit. The wearer will then try to pick up pins of varying size to provide an indication of dexterity. Five pins are defined of diameter from 5 mm to 11mm, clearly the smaller the diameter that can be picked up the greater the dexterity result.

将手套佩戴在对应尺码的手上，对舒适性和贴合性做出评论。然后佩戴者将尝试拾取不同尺寸的金属小圆柱，了解其灵巧性。小圆柱的直径分布为5mm到11mm，显然，可以拾取的圆柱直径越小，灵巧性结果越也越好。

pH Value pH值

The determination of pH value of both leathers and textiles on a glove is required. This pH value shall be greater than 3.5 and less than 9.5. The test samples are taken from the palm of the glove, if other part of the glove contains different material, these materials shall be tested separately. A prepared test sample is extracted in water by mechanical shaking; the aqueous extract is then decanted and the pH value determined by a pH meter. An excessive amount of acid or   alkali in a material has been linked to skin dermatitis and may indicate poor process control.

要求测定手套上皮革和纺织品的pH值，应大于3.5且小于9.5。从手套的手掌部位取样，如果手套的其他部位含有不同的材料，则应分别测试。通过机械摇动将制备的测试样品在水中进行提取，然后将水提取物倒出来，用pH计测定pH值。如果材料中酸或碱过量，会引起皮炎，可能表明制程控制不良。

Chrome VI 六价铬

Each type of leather on a glove shall be tested separately and comply with the requirement of less than 3mg/kg of chromium VI. Two samples require testing from each leather type; these two samples shall be taken from different gloves. The soluble chromium VI is leached from the leather in a phosphate buffer. The chromium VI in the extract is then oxidized to produce a red/violet colour; this can then be quantified by a UV spectrophotometer. Chromium VI is a restricted substance as well as being a known allergen.

手套上的每种皮革应单独测试并符合六价铬低于3mg / kg的要求。每种皮革要测试两个样品，并分别从不同的手套上取样。在磷酸盐缓冲液中，可溶性六价铬会从皮革中滤出。提取物中的六价铬会氧化，呈红/紫色; 然后可以通过UV分光光度计测定其含量。六价铬是已知的过敏原，也是限用物质。

以上就是小编介绍的防护手套

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