GB 12799-91 Safety and health performance requirements for oil- and water-repellent protective clothing
2014-4-21
1. Topic content and scope of application
This standard specifies the safety, hygiene and technical performance requirements for oil- and water-repellent protective clothing.
This standard applies to labor protective clothing for on-site operations with frequent contact with oil and water media. Its types of work include drilling and well
Off-duty workers, etc.
2. Reference standards
GB3291 Textile terminology, general part of textile materials and textile products
GB3923 Determination of breaking strength and breaking elongation of woven fabrics (strip method)
GB4745 Textile fabrics – Determination of surface moisture resistance (water test method)
GB5453 Test method for fabric breathability
GB7916 Hygiene Standard for Cosmetics
ZBW04003 Fabric stiffness test method Inclined cantilever method
3. Terminology
Oil-repellent and water-repellent means that after finishing, the surface of protective clothing fabric fibers can repel and alienate oil and water-based liquid media
quality, so as not to hinder breathability and comfort, but also effectively resist the erosion of such liquids on underwear and the human body.
4. Technical content
4.1 Classification: It is divided into two categories: winter and summer oil-resistant and water-repellent protective clothing.
4.2 Performance requirements: The index requirements for each performance are specified in Table 1.
Table 1
━━━━┯━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Measurement items│Indicators Requirements
────┼────────────────────────────────
Oil resistance│≥130 points; and can resist engine and diesel overturning and leakage
Water repellent│=Level 5
Washed 30 times│Remaining oil resistance ≥80 points; remaining water repellency ≥1 level, no water seepage on the back
Fabric fastness│Sum of warp and weft breaking work Summer ≥2450N·cm; Winter ≥3430N·cm
Breathable│Summer ≥6×10＾(-2)m＾3/(m＾2·s); winter ≤2.3×10＾(-2)m＾3/(m＾2·s)
Moisture permeability│Summer ≥4000g/(m＾2·d); Winter ≥2300g/(m＾2·d)
Stiffness│at -18℃, ≤7.5cm
Contact hygiene│The finishing agent is directly applied to human skin for 24 hours without any erythema or edema
│Finishing agent, oral acute toxicity test on mice and guinea pigs, LD50; ≥10000mg/kg body weight
━━━━┷━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
5.Measurement methods for various performance indicators
5.1 Determination method of oil resistance (using scoring method)
5.1.1 Reagents: The standard reagent ratios for each score are listed in Table 2.
Table 2
━━┯━━━━━━━━━━━━
Score│Standard reagent ratio, %
├─────┬──────
│White Mineral Oil│N-Heptane
──┼─────┼──────
50│100│0
60│90│10
70│80│20
80│70│30
90│60│40
100│50│50
110│40│60
120│30│70
130│20│80
140│10│90
150│0│100
━━┷━━━━━┷━━━━━━
Note: ① The standard reagent ratio is based on volume ratio and prepared in an environment of 20°C.
②The white mineral oil and n-heptane used are chemically pure reagents.
③After the standard reagents are prepared, they are valid for two months and must be prepared again at that time.
5.1.2 Sampling and humidity control treatment, take two 20cm×20cm samples of the fabric to be tested, according to the requirements of Chapter 5 of GB4745,
Perform humidity control.
5.1.3 Testing is carried out at room temperature of 25±1℃. Place the humidity-controlled sample flat on a smooth surface,
Use a dropper to take each score standard reagent in sequence, from low to high, and then carefully and gently drop it onto the sample. The diameter of each drop
4–5mm, drop 5 drops per minute on each sample, the distance between every two places is not less than 1.5cm, stay for 3 minutes, diagonally upward from a 45° angle,
Observe that the fabric at the bottom of the reagent droplet is reflective and shiny, and there is no infiltration, which means it has passed the score test. If it becomes dark and the fabric is soaked
Run, that is, it fails the score test. Among 5 places, the test results of more than 4 places shall prevail. After that, the passing score is
Accurate to evaluate oil resistance. If the results of the two pieces are inconsistent, another piece should be taken and retested, and the majority result shall prevail.
5.1.4 Resistance to machine or diesel overturning leakage test: Take two samples that have been subjected to humidity conditioning treatment according to Article 5.1.2 of this standard,
Place them flat on a smooth table covered with a layer of white filter paper. Use a 50mL measuring cup to measure 5mL of engine oil or diesel.
And slowly dumped them at the center of the sample. Let it stand for 24 hours at room temperature, absorb all the oil on the surface of the sample, and observe the back of the sample
Oil seepage on the surface and liner filter paper. It is required that the engine oil has no visible traces on the back of the sample and on the filter paper
Penetration traces; diesel oil does not have any traces of penetration on the liner filter paper (there may be slight visible traces on the back of the sample), this
To meet anti-leakage requirements. Anything beyond this limit does not meet the requirements.
5.2 Water repellency test method
The water repellency test method is in accordance with the provisions of GB4745.
5.3 Washing test method
5.3.1 Washing equipment: Household double-tub washing machine.
5.3.2 Washing program: Use medium-speed, weakly alkaline detergent without enzymes and whitening agents, with a concentration of 2g/L and a liquor ratio of
(Fabric: lotion) is 1:30, the temperature of the lotion is 30±3℃, the pH value is not greater than 9, the water volume is not less than 30L, to be tested
The fabric sampling size shall be sufficient to measure the remaining performance. When the sample is insufficient, use the same fabric as the sample to make up for it and wash
Wash and drain for 10 minutes, rinse for 2 minutes, dehydrate for 2 minutes, air dry or tumble dry, this is one time. Repeat this until
is satisfied
until the required number of washes.
5.3.3 Measure the remaining oil and water repellent properties. Before measuring the remaining properties, the sample must be baked at 150℃ for 4 minutes
Or iron it with an iron at the same temperature for 2 minutes, and then measure the value after washing according to the methods specified in Articles 5.1 and 5.2.
Residual oil and water repellency. 5.4 Fabric fastness
The fabric fastness is tested according to the test method specified in GB3923, and according to the “peak
specified in Article 2.2.8.7 of GB3291
The warp and weft rupture work of the fabric to be tested is obtained from the concept of “value of work of rupture”, and then added together to obtain the sum of the work of rupture of the fabric
and. The fastness of the fabric is evaluated by the sum of the work of rupture.
5.5 Determination method of air permeability
The air permeability measurement method is determined according to the method specified in GB5453.
5.6 Determination method of moisture permeability (using evaporation method)
5.6.1 Sampling: Take three samples with a diameter of 5.5cm from the fabric to be tested. The samples are required to be representative of the fabric.
There must be no serious defects that affect the test results.
5.6.2 The evaporation cup is made of 2.5mm thick aluminum plate, with an inner diameter of 5cm and an inner height of 5.6cm. There is a fastening fabric pattern on the upper edge
Premium metal clips, three in each set.
5.6.3 Constant temperature and humidity conditions Constant temperature: 38±1℃; Constant humidity: RH25.0%±5.0%.
5.6.4 Test steps: Fill each evaporation cup with 50g of distilled water, and cover the fabric sample to be tested face up
The upper edge of the cup is clamped with a fastening ring, and then placed on a rotating rack in a constant temperature and humidity box. The rotating rack rotates at 11~12r/min
Rotate at a constant speed, and the constant temperature and humidity box maintains a balanced state of ventilation. Take it out after 30 minutes, with an accuracy of 0.0001g
The balance is weighed, and the initial liquid mass G0 is obtained, then placed in a constant temperature and humidity chamber for 6 hours, then taken out and weighed,
Get the remaining liquid mass G1.
5.6.5 The calculation of the result is based on formula (1) and formula (2):
i＾1)＝4(G0-G1)/S……………………(1)
_3
i={Σi}/3……………………(2)
i=1
In the formula: S – evaporation escape area on the upper edge of the cup, m＾2;
i——moisture vapor permeability, g/(m＾2·d);
^
i——average moisture vapor permeability, g/(m＾2·d);
G0——initial liquid mass, g;
G1——remaining liquid mass, g.
Note: ＾1) The discrete range of moisture permeability i is within ±10% of the average moisture permeability.
5.7 Stiffness
The stiffness is tested in a temperature environment of -18°C according to the regulations of ZBW04003.
5.8 Contact hygiene
Contact hygiene is tested according to the requirements of GB7916.
5.9 Dosage period and evaluation method
5.9.1 The wearing fastness requirements are adapted to the following continuous wearing period:
The summer period is no less than 8 months; the winter period is no less than 10 months.
5.9.2 The service life is evaluated empirically according to formula (3) based on the physical and mechanical measurement results of the fabric used:
Y=(88.8+0.062E)/30……………………(3)
In the formula: Y – duration of use, months;
E——The sum of the work of fracture in the longitudinal and latitudinal directions, N·cm��
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