Labor protection gloves General technical conditions GB/T12624-2006
Approved by the National Bureau of Standards 2006-09-01 implementation
Foreword
The standard modified European standard EN 420:2003 "Gloves General technical requirements."
This standard with EN 420:2003, there are a few technical differences:
- The standard deleted to EN 420:2003, 4.2 "glove materials against water pressure."
- This standard is to delete the content of the requirements of EN 420:2003 in 4.3.3, "Chromium (Hexavalent) and Appendix B of leather chemical testing of chromium (hexavalent) Determination."
- The standard deleted 4.3.4 of EN 420:2003 in "extract protein content."
- The standard deleted to EN 420:2003, 4.5 "Electrical Performance."
- The standard modified to EN 420:2003 5.1.1 Table 1 "hand size" (see Appendix C).
- This standard is to modify the EN 420:2003 in 7.3 "manufacturer information".
This standard replaces GB / T 12624-1990 "labor protective gloves General technical conditions."
The main changes of this standard of GB / T 12624-1990 as follows:
a) delete the classification mark of the labor protective gloves, the technical requirements of the various types of gloves and the corresponding test methods;
b) increase the structure of the labor protective gloves, harmless, pH value, comfort and effectiveness of technical requirements and corresponding test methods;
c) increase the marking requirements of the labor protective gloves.
Appendix A of this standard is a normative appendix, Appendix B and Appendix C for the data appendix.
This standard is the State Production Safety Supervision Administration.
This standard is under the jurisdiction of the National Personal Protective Equipment Standardization Technical Committee (SAC / TC 112).
This standard was drafted: Shanghai Institute of Labour Protection.
The main drafters of this standard: the Gu Zhishi, Mei Canhua, and Tang Yiming, Chan Kwok-keung.
Introduction
European Committee for Standardization protective clothing Technical Committee CEN / TC 162 in 1994 to develop EN 420 Gloves General technical requirements ", and was revised in 2003. 17 in the United Kingdom, France, Germany and other European countries to implement. In order to meet the needs of the standardization work, and further coordination with the international advanced standards, promotion of trade and exchange, modify, EN 420 is necessary.
1 Scope
This standard specifies the labor protective gloves (hereinafter referred to as "The Glove"), technical requirements, test methods, marking and identification, and instructions for use.
This standard does not apply to live working with insulated protective gloves and medical protective gloves.
2 Normative references
The terms of the following documents become the standard reference in the provisions of this standard. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard using the latest version of these files . All dated reference documents, the latest versions apply to this standard.
ISO 4044:1977 Leather Preparation of chemical test samples
ISO 4045:1977 Leather pH value determination
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1 hand hand
Part of the body, from the middle finger hand wrist.
3.2 glove glove
Part of it is used to protect the hand or hands from harm individual protective equipment. Can be extended to cover part of the forearm.
3.3 gloves, the palm of the glove Palm
Glove covering a part of the palm of your hand.
3.4 gloves back of the glove back
Glove covering a part of the back of the hand.
3.5 The flexibility dexterity
Degree of flexibility in the hand work.
3.6 Hazard harzard
Harmful to human health harm to a variety of situations.
3.7 The level of performance level of the Performance
Corresponding test results to determine the category and grade. The better the performance, the higher the level.
Because the level of performance is built on top of the results of the pilot test, so they are not necessarily related to the actual workplace.
4 technical requirements
4.1 structure of the gloves
Design and manufacture of gloves should be fully considered the requirements, so that users operating activities to maximize the protection and operational flexibility.
If necessary, gloves should be minimum wear and detachable time.
When the structure of the glove seam, the strength of the suture should not significantly reduce the overall performance of the gloves.
4.2 gloves sound
4.2.1 General requirements
Gloves, and the user is in close contact with some, such as glove liners, line, welt, etc. should not be detrimental to the safety and health of users.
Manufacturers will be known in the glove are allergic to substances, should be stated in the description in the glove.
4.2.2 the pH value
The pH value of all the gloves should be as close to neutral.
The pH value of leather gloves should be greater than 3.5 less than 9.5.
4.3 comfort and effectiveness
4.3.1 Size
4.3.1.1 hand the size of the
Measure the two parts:
Palm circumference (thumb and index finger of the bifurcation of up to 20 mm at the girth)
Hand length (the distance from wrist to middle finger)
Table 1 defines the size of the six numbers of the hand.
Table 1 hand size
Size number of the hand
Palm circumference / mm
Hand length / mm
6
190
160
7
196
170
8
201
180
9
205
190
10
210
200
11
213
210
4.3.1.2 gloves Size
Gloves Size is determined according to the size corresponding to the hand.
Table 2 defines the six specifications institutions gloves size.
Table 2 gloves Size
Size number of the hand
Scope of application
The shortest length of the gloves / mm
6
Hand size number 6
223
7
Hand size number 7
230
8
Hand size number 8
240
9
Hand size number 9
250
10
Hand size number 10
260
11
Hand size number 11
270
4.3.1.3 gloves special size requirements
Designed for special purposes, gloves size does not meet the requirements of Table 2.
The manufacturer should be a detailed description of requirements on the use of the gloves do not meet the Table 2 reasons.
4.3.2 flexibility
To achieve the purpose of the premise, gloves should, as far as possible, so that users flexible operation. The flexibility test methods in accordance with clause 5.3 shall be tested according to the grading requirements in Table 3.
Table 3 performance levels - flexibility test
Level of performance
Experimental conditions to complete the minimum test rod diameter / mm
A
11.0
2
9.5
3
8.0
4
6.5
5
5.0
4.3.3 The water vapor permeability and water absorption vapor
4.3.3.1 In exceptional workplaces, gloves should be a certain degree of permeability to water vapor.
If necessary, in the test method in accordance with 5.4 the provisions of the leather gloves should be of not less than 5 mg / (cm2 h) The water vapor permeability.
4.3.3.2 Gloves should reduce perspiration.
If necessary, the test method in accordance with 5.5 the provisions of leather gloves within 8 h should be less than 8mg/cm2 absorbent vapor.
5 Test methods
Unless there are special requirements, all tests should be carried out on unused gloves.
If the product descriptions in the relevant provisions, shall be tested in accordance with relevant standards before washing and cleaning requirements after the number. The appropriate level of performance criteria unchanged.
5.1 Determination of pH value of
Leather gloves - Determination of pH according to ISO 4045:1977 regulations.
5.2 hand and glove size measurement
5.2.1 palm circumference with a tape measure (accuracy: ± 1 mm) measuring up to 20 mm of the bifurcation of the measurement site in the thumb and index finger (see Figure 1).
5.2.2 hand length measurement site shown in Figure 1.
5.2.3 gloves length measurement: from the top of the glove on the back of the middle finger to the bottom of the glove.
5.2.4 If the gloves are made of elastic material or an elastic wrist gloves, measure the glove length should be no elongation of the sample.
Determination of 5.3 flexibility
5.3.1 the number and condition of the specimen
Sample of four pairs of new gloves, without any softening of processing (such as using wooden club pat or squeeze in the wheel).
5.3.2 Test Equipment
Five grinding test of the stainless steel rods, each length of 40 mm, diameter of 5.0 mm, 6.5 mm, 8.0 mm, 9.5 mm, 11.0 mm.
5.3.3 Test Method
The test stick on a flat surface, a trained testers put on the gloves with the index finger and thumb folders pick up the test bar. The test should pick up test wand three times in 30 s continuous.
5.3.4 The test results
5.3.3 the provisions of test methods that can be picked up the smallest diameter of the test rods, is the test results.
5.4 into the water vapor test methods
5.4.1 apply to Fan Tian
This method is suitable for all leather gloves.
5.4.2 Principles of
Leather specimen was fixed in the movement in a certain temperature and humidity conditions, the test bottle, the test bottle equipped with a solid desiccant, the movement of the test bottle, water vapor through the leather specimen absorbed by the solid desiccant within the specified time on the test The bottles weigh, you can determine the weight of water vapor through the leather this time desiccant absorption.
5.4.3 Instrument and materials
The equipment consists of the following components:
a) the test bottle roughly the shape shown in Figure 2. Equipped with a threaded lid, the lid has a diameter of 30 mm hole, the hole is equal to the bottleneck hole size. Bottle flat and bottlenecks wall vertical.
In millimeters
Figure 2 of the water vapor permeability testing bottles and test bottle bracket
b) Testing bottle bracket is driven by the motor rotation speed of (75 ± 5) r / min. Test bottles are placed in this round bracket, parallel to the axis of the test bottles and circular axis, two-axis distance of 6.7 mm (see Figure 2).
c) The fan on the test bottle, consisting of three mutually 120 ° angle of the blade. Blades flat and round parallel to the axis of the fan size of 75 mm/90 mm. Movement, the fan away from the bottleneck distance should be no less than 15 mm. The fan speed (400 ± 100) r / min. Equipment used in ambient temperature (20 ± 2) ℃, relative humidity (65 ± 2)%.
d) just drying the silica gel should be dried in the oven (125 ± 5) ° C for at least 16 h, then cool for at least 6 h in a sealed container. The diameter of the silica particles should be greater than 2 mm.
The silica gel should be dried before the sieve once to remove fine particles and dust. The oven should not be sealed. Oven inside and outside air for continuous circulation. Drying silicone higher temperature than the sample of leather, should not be used often.
e) The balance accurate to 0.001g. Measure the bottleneck inside diameter with a vernier caliper reading to 0.1 mm.
5.4.4 sample preparation
Cut the side length of 50 mm square specimens from the three gloves ready to test. Specimen should be smooth and without cracks.
Unless there is other method you specify otherwise, as follows gently polishing grain surface. Specimen grain face up on the table. Take a numbers 180 emery paper on the specimen, and glide pressure of about 2 N evenly in all directions 10. A diameter equal to the bottleneck outside diameter circular sample (approximately 34 mm) cut from the polished leather specimen.
5.4.5 Test Method
In order to meet the sample conditions, the test bottle into a bottle of just drying the silica gel. Samples facing the inner fixed in the bottle. The bottle is fixed on the machine, start the motor.
Measuring the internal diameter of the second bottle bottleneck with a vernier caliper in two perpendicular directions, and marked the average diameter d, is accurate to 0.1 mm.
If necessary, in the seams of the sample and the bottle coated with beeswax.
When the machine rotation for 16 h, shutdown, remove the first test bottle. The other half just dry silica gel (59.0 g ± 0.5 g) of loading only the second test bottle. At the same time remove the specimen from the first in a bottle, mounted to the second bottle, grain facing clamping (see Figure 2).
Time as possible without delay, quickly with silicone specimen bottles weigh and record the weighing time. Bottle into a fixed position on the machine, start the motor.
Motor run not less than seven hours, not more than 16 h, turn off the motor, remove the bottle and weighed. Record the weighing time.
Note 1: For the most lightweight leather, there is no need in the seams of the sample and the bottle sealed with beeswax. When the cover is screwed tightly. The sample was clamped, but the leather thickness of more than 3 mm usually too rigid application of beeswax seal. In addition, low water vapor permeability of lightweight leather or protruding grain should be sealed. Because they can not determine alone the jig will be able to completely prevent the leakage of the sample side seam. For this reason, if a seal to be tested samples of the P value is less than 5 mg / (cm2 h) The application of beeswax to seal the edge of the re-test, so the results obtained as a sample of the measured results. Even for particularly stiff or do not penetrate the leather, the seams of the sample and a bottle sealed with beeswax is also unnecessary, because the preliminary step for the bottle just to make the sample can be in the vapor flow maintain a stable equilibrium state.
Note 2: If you need to use beeswax to seal a second bottle of the bottle, the bottle should be placed before the silica gel and clamping leather in an oven heated to 50'C.
5.4.6 the results of calculations
Permeability to water vapor ratio of weight gain and the time interval P dollars, the value is expressed in milligrams per square centimeter hours mg / (cm <2 • h), the calculation according to equation (1):
Where:
time interval t ------ between the two weighing units of points (min);
m ------ twice weighing the increment, in units of milligrams (mg);
d ------ bottle diameter, in millimeters (mm).
The calculation results to one decimal place.
The water vapor permeability of gloves should be the average of three results from the three samples measured.
5.5 absorbing water vapor permeability test methods
5.5.1 The sample
Circular specimen of a diameter of 85 mm were cut from three gloves, specimen should be flat, no stitches or material defects.
The sample should be placed for 24 h in the temperature (20 ± 2) ° C, relative humidity (65 ± 5)% of the environment.
5.5.2 equipment
Test equipment for the absorbent vapor testing panel consisting of a cover and base, the opening diameter of 56 mm deep (30 ± 1) mm (Figure 3).
In millimeters
1 - top cover; 2 - sealed pad; 3 - samples; 4 - base
Figure 3 absorbent vapor device
Rubber or metal seals to help clamp the specimen should be placed between the cover and base.
5.5.3 Test Method
5.5.3.1 test environment humidity (20 ± 2) ° C, relative humidity (65 ± 5)%.
5.5.3.2 first right after the pretreatment of the sample weighing, then the sample on the base of the test equipment, under the cover with 50 cm of water. Note that the gloves should be facing down the inner surface of placed. Pad a good ring covered with top cover, and gently tighten the mounting bolts.
5.5.3.3 8 hours, remove the top cover, and quickly removed the samples were weighed.
5.5.3.4 test results
Absorbing water vapor to increase the ratio of surface area of quality and test total, the values expressed in milligrams per square centimeter (mg/cm2), the calculation results to one decimal place.
6 signs and instructions for use
6.1 General Requirements
Marking and identification should be marked in the visible, legible and easy to fall off during use, may be a conflict of the other mark should not appear in the glove.
Each glove on the signs with the logo on the packaging should be consistent.
6.2 mark
6.2.1 Each glove should be marked the following signs:
a) gloves, trademark, manufacturer, or a description of the dealer;
b) The gloves name (commercial name or code, so that users know the producers and the scope of application);
c) The size of the model;
d) if necessary, according to standard 6.2.3 is valid.
6.2.2 gloves, outer packaging should be marked with the following flags:
a) the manufacturer or distributor of the full name and address;
b) in 6.2.1 b), c), d) item information;
c) Read the instructions tips
d) when the hazards listed in the glove only protection Appendix A (Normative) on the packaging "minimum hazard protection".
e) When in accordance with the relevant standard test, the gloves can reach one or more high-performance grade, should be the logo, and indicate the level of performance. Identification method, see Appendix B (Informative Appendix).
f) When the protective role of the gloves is limited to part of the hand, should be described.
6.2.3 is valid
Gloves output within one year, although not to use gloves, protective performance was significantly affected by the influence of time. One or more of the level of performance has been degraded, gloves and packaging should be marked with a validity period.
6.3 Instructions for use
Gloves to enter the market should at least provide the following information.
6.3.1 The manufacturer or distributor of the full name and address.
6.3.2 6.2.1b) the information requested.
6.3.3 4.3.1.3 The size appropriate rejection of the scope and application of workplace information.
6.3.4 Appendix B identifies types of hazards should be the appropriate level of performance. Use of gloves in the level of performance in accordance with the relevant test standards, should be described, in order to help users understand.
6.3.5 When the gloves, protective role was limited to part of the hand, should be described.
6.3.6 gloves contained a known cause allergic substances, use the list.
6.3.7 manual.
6.3.8 related components and spare parts.
6.3.9 The transport, packaging, storage requirements.
Appendix A
(Normative)
The definition of "minimum hazard protection
Protect users from the following hazards:
- Affects only the skin surface of the mechanical work (gardening, protective gloves, etc.);
Protective gloves - easy to eliminate the influence of light corrosive wells (cleaning agents, etc.);
- Operating the hot workpiece, the operator is exposed to no more than 50 ° C high temperature harmful to the environment and dangerous impact environments;
- Neither abnormal-extreme natural atmospheric conditions (seasonal clothing);
- Does not have a fatal impact it does not produce a small shock and vibration can not eliminate the impact.| Updated:2012.02.03 Source: Clicks:1880
