Safety shoes are the general term of safety shoes and protective shoes, which generally refer to shoes worn in different working places to protect feet and legs from foreseeable injury. Safety shoes belong to footwear products with high technical content and high added value. The production process of safety shoes has high requirements for raw materials, auxiliary materials, chemical materials, mechanical equipment, etc. at present, many domestic shoemaking enterprises with a certain scale and grade have set their eyes on the market field of safety shoes, which was previously occupied by developed countries. Xiaobian has collected some international standards on safety shoes. I believe interested friends will like it.
1. European standard en344:1997 special safety, protection and work shoes
The European standard was formulated by the technical committee CEN / TC61 "protective articles for feet and legs", and its secretariat is held by BSI.
The standard specifies the type design, structure and performance indexes of whole shoes, upper, lining, tongue, insole and outsole of safety protection shoes. The test methods of various items specified in the standard are similar to other similar standards, and its method principle is also generally applicable to most safety protective shoes. The main indicators are:
a. The impact resistance of the Baotou shall be tested with a steel impact hammer of the specified weight. When the Baotou is impacted, the gap height under the Baotou shall be less than the specified value, and there shall be no penetrating crack in the direction of the test axis. It is worth noting that the weight, specification, impact height and structure of testing machine of impact hammer are different in national standards, which should be distinguished in actual testing.
b. A pressing plate is installed on the anti puncture performance testing machine, and a test nail is installed on the pressing plate. The test nail is a head with the tip cut off, and the hardness of the nail head shall be greater than 60HRC. Place the sole sample on the chassis of the testing machine so that the test nail can pierce through the outsole. The test nail pierces the sole at the speed of 10mm / min ± 3mm / min until it penetrates, and record the maximum force required. Four points shall be selected on each sole for the test (at least one point is at the heel), the distance between each point shall not be less than 30mm, and the distance from the inner sole edge shall be more than 10mm. The bottom with anti sliding block shall be pierced between blocks. Two of the four points shall be tested within 10-15mm from the edge line where the planting bottom ridge is located. If the humidity will affect the results, immerse the sole in deionized water at 20 ℃± 2 ℃ for 16 ± 1H before the test.
The electrical performance footwear of C. conductive shoes and antistatic shoes is adjusted in dry and wet atmosphere. The clean steel balls are filled into the shoes and placed on the metal probe device. The resistance between the front two probes and the third probes is measured by the specified resistance tester. Generally, the resistance of conductive shoes shall not be greater than 100k ohm; The resistance of antistatic shoes shall be between 100k ohm and 100m ohm.
d. For thermal insulation performance, take the finished shoe as the sample, install the thermocouple at the center of the inner sole connection area, and fill the steel ball into the shoe. Adjust the temperature of the sand bath pot to 150 ℃ ± 5 ℃, put the shoe sample on it to make the sand contact the outer sole of the shoe, use the temperature test device connected with the thermocouple to measure the temperature of the inner sole and the corresponding time, and give the temperature increase curve. Calculate the increased temperature 30 min after the sample is placed on the sand bath. In general, the temperature increase of insole surface is required to be less than 22 ℃.
e. The maximum compression load of the energy absorption performance test instrument of the heel part is 6000N, and a device is equipped to record the load / deformation characteristics. Place the shoe sample with heel on a steel plate, and place the test punch against the insole on the inner side of the center of the heel part. Apply the load at the speed of 10mm / min ± 3mm / min. Draw the load / compression curve and calculate the absorbed energy E in joules.
f. Requirements for anti-skid outsole this standard specifies to test the anti-skid coefficient of the sole, but specifies the design and specification of the anti sliding block, such as the thickness of the sole, the height of the anti sliding block, the distance from the edge of the sole, etc.
2. Standard: en345-1 American ansi-z41 Chinese an1
Functions: anti smash, anti impact, anti puncture, anti-static, anti splash, anti slip, oil resistance, acid and alkali resistance, high temperature resistance, wear resistance and cushioning, sweat absorption and deodorization.
Upper: imported smooth leather, comfortable and breathable, waterproof and wear-resistant.
Inside: grey Stella + moisture permeable cloth + absorbent cotton, disinfection and bacteria prevention, water absorption and sweat absorption.
Insole: foamed Pu, anti-static, good rebound, compression resistance, ventilation and strong deodorization function.
Sole: double color and double density PU / TPU upper integrated injection molding, anti-skid and waterproof outsole can cushion pressure, comfortable, anti-skid and super wear-resistant.
Steel head: European (CE) Chinese an1 standard, which can withstand 200 Joule impact force (23kg * 900mm > 15mm) or 15kn static pressure.
3. Canadian standard for work safety shoes
This standard is based on the Standards Association of Canada (CSA) standards and is determined according to z195-02: "protective shoes" and z195.1-02: "guidelines for selection, care and use of protective shoes".
Possible foot injuries that may occur to workers during surgery or in the workshop of the University of Toronto (Note: in this standard, "workers" include medical school personnel, staff, international students and tourists).