Guards are one of the most dangerous and dangerous jobs in the world and we are most easily touched by their dealings with death. Their spiritual support in the face of dangerous excitement stems from their respect for life. Fire Fighter Equipment: Clothing protective equipment mainly refers to clothing, helmets, boots, glasses, etc. that prevent firefighters from being exposed to heat, drugs, and other harmful environmental damage. There are fire fighting suits, thermal insulation suits, fire escape suits, and emergency rescue suits.
Fire fighting suits are protective clothing worn by fire fighters to protect themselves when they enter a general fire place to fight fires. They are suitable for use in the "regular" state of the fire. Fire fighting service is divided into 85 types and 97 types. At present, the fire squadron is equipped with eighty-five types of fire fighting clothing. The clothing is divided into four types: winter clothing, summer clothing, fireproof and waterproof clothing and long-type fire protection clothing. It is suitable for general fire fighting and is not suitable for near-fire operations and emergency rescue. For help. The 1997 Battle Suit is a new type of fire fighting suit that has been successfully researched and developed. It has functions such as fire prevention, flame retardant, heat insulation, and anti-virus. It is suitable for fire fighting and partial rescue work.
1, the harm of fire on the human body
Burns, radiation, steam burns, frostbite, fatigue
2, firefighters work status
The “normal†state corresponds to the state in which the firefighters operate the water zone in the face of the fire or have a certain distance from the fire source. The radiant heat flux is below 1.5kw/m2 and the temperature is below 60°C.
"Dangerous" state - equivalent to the situation outside a burning room or outside a small burning building, with a radiant heat flux of 1.5kw/m2 to 13.6kw/m2 and a temperature of 60°C~ 300 °C range.
“Critical†state—equivalent to a situation similar to that encountered in a violently burning crashed aircraft or when a flashover occurs. The radiant heat flux is 13.6kw/m2 to 200kw/m2, and the temperature is 300°C to 1100°C. range.
3, the protective function of fire fighting suits and related measurement methods
(1) Flame Retardant Performance (Vertical Combustion Test)
The 12-inch long strips were placed in a propane flame and fired for 12 seconds. The flame was removed and the duration of the flame was measured. The flame-retardant time and the char length of the strips were measured.
(2) Thermal protection performance (TPP)
1 Thermal protection performance (TPP) test: Place the fabric under thermal convection and thermal radiation heat source and record the time required for the secondary burn.
Time X heat source heat = TPP value
2TPP test method
The TPP test is to place a 6-square-inch piece of fabric under a heat of convection and radiant heat source with a total energy of 2cal/cm2.sec, and then record the time required to reach the secondary burn. The TPP value is the time multiplied by cal/cm2. The value of sec. Unlike the vertical burning test, the TPP test can tell us how much energy the simulated human skin needs to absorb to reach secondary burn through various fabrics. That is to say, the higher the TPP value, the higher the exposure of the fabric to the body's exposure to heat and heat. Under the higher protection, the unit TPP value is the most direct connection for thermal protection performance.
3 Thermo-man? Thermal protection test (Thermo-man?)
In order to further simulate the degree of burn of the human body in the actual flame, it is used to test the degree of protection provided by the clothes under the actual fire conditions of the whole suit. Through this test, we can predict the degree of secondary and tertiary burns the body suffers. The lower the degree of systemic burn, the greater the chance of survival.
The mannequin test is a 6-inch-high mannequin made of special glass epoxy resin with a body of 122 temperature testers. It is put on a fire suit and exposed to the 2cal/ of 12 propane flamethrowers. In the cm2.sec heat, the computer simulates the degree and degree of secondary and tertiary burns and parts of the human skin that may be affected by data collected from 122 temperature testers.
4, protective performance
1) It has a permanent protection function; 2) It has a function of not melting and not supporting combustion;
3) Has no cracking function; 4) Chemical resistance;
5) Long-wearing; 6) Comfort.
5, the structure of 97 battle suits
The 97 combat suit consists of tops and trousers. The tops and trousers consist of four layers: the surface layer, the waterproof layer, the heat insulation layer and the comfort layer.
Outer surface layer: It is made of Meytas material produced by DuPont, which contains 5% Kevlar fiber. It is resistant to high temperature of 4720C and is permanently flame-retardant. The material does not shrink in the event of fire and does not produce molten droplets.
Waterproof layer: PTFE waterproof permeable diaphragm.
Insulation: flame retardant chemical fiber nonwoven felt.
Comfort layer: cotton fabric, wool.
Aluminum Sheet With Marble Color
Aluminium Flat Sheet,Polished Aluminum Sheet,Perforated Aluminum Sheet,Decorative Aluminium Sheet
SHAOXING YOTO IMPORT&EXPORT CO., LTD , https://www.sxyoto.com