Fire protective clothing : Fire rescue personnel " Body armor "

   Various fire scene , fire and rescue personnel will always see people dressed in dark blue clothes burst into fire rescue, this body is special clothing firefighting protective clothing - protective clothing and rescue personnel. Yesterday, Wuhan fire department of this garment is devoted .
    According to reports, HENGDA firefighting clothing when performing fire fighting and rescue firefighters wearing protective clothing versatility , it uses a combination of imported materials permanent flame retardant fabric , insulation blankets made ​​with excellent fireproof, waterproof , insulated , breathable performance, its reflective effect is obvious, is one of a new generation of special protective equipment firefighters .
    Protective clothing needs with helmet, gloves, rubber boots supporting the use of firemen wearing it for extinguishing a fire in the state in general , rescue fighting, but should avoid direct contact with the flame and molten metal .
    Firefighters into the fire should be put up collar , and make it coincide with the helmet of a shawl to protect the neck. Fire gloves should coincide with the cuffs , trousers should be placed outside the fire boots , and formed part of the overlap with the boots , protective clothing, rescue should be closely linked to all parts .
    Protective clothing while having excellent flame retardant properties, but it is still burning in flames , just leave the flame to stop burning and therefore should not be used as fireproof clothing, avoid the fire service and other use is prohibited in high temperature, chemical , biological, radiological electrical occasions.
    The fire fighting protective clothing in continuous wearing time not more than one hour , wearing fire protective clothing to avoid exposure to duty in the hot sun .

Effect of firefighters extinguishing protective clothing breathable performance

1. The physiological effects

Human thermoregulation center at hypothalamus, under its control, produce heat and cooling in dynamic equilibrium, can maintain the normal body temperature. In movement in the environment of high temperature such as fire, the body's metabolism speeds up, heat production increases, the fireman body will use skin vasodilation, blood flow speed, increased sweat gland secretion, respiration, etc., will be in the heat generated by the multilayer structure to surface through the fire fighters clothing, by radiation, conduction, convection and evaporation heat, to keep the temperature within the normal range. According to research, the circulatory system at the same time, the peripheral tissue thermal conductivity value can increase 5-6 times, this is called the heat stress. Biology has this kind of stress ability, to ensure the survival under thermal environment. But there is a limit to people's ability to heat stress, but also has great individual differences. If firefighters extinguishing protective clothing breathable heat dissipation performance is bad, and in a hot environment movement time is too long, more than heat stress ability of the individual, will appear below the thalamus sweat central obstacles, the body does not through perspiration evaporation heat, make the accumulation of excessive heat in the body and lead to body temperature, sweat, firefighters shortness of breath, heart rate, pulse quickened. If not timely relief and recovery will make firefighters, dizziness, headache, flustered, nausea, vomiting, environment in hot summer, and may cause a fireman syncope or shock.

According to research, the influence of heat stress on firefighters also embodied in the accumulation of heat inside the firefighting clothing, a large number of sweat will cause the decrease of blood flow, especially the decrease of the amount of plasma. At the same time, increased body temperature cause vasodilation, blood vessel diameter increased, make more blood sedimentation in the venous system, the return of the heart blood is reduced, resulting in blood flow and blood pressure decrease quickly, the heart is unable to provide enough health at the same time meet the needs of muscle, myocardial and brain blood supply, easy to cause chest and heart attack. Firefighters is heart disease one of the leading causes of death, the United States each year from heart disease death firefighters more than accounted for about 40% of all deaths.

2. The psychological impact

Heat mass inside the fire protective clothing, can make the firefighters fatigue degree increase rapidly, power, a big drop in excitatory declined obviously, confusion, depression and other negative emotions rise, higher operating error count, right decline, mental decline, velocity, decreased sensitivity and so on, seriously affect the operational efficiency.

Welding gloves

For the defense during welding of high temperature, molten metal, spark burning hand personal protective equipment. Made with cattle, pigs marmoset leather or split leather, according to the type refers to the different divided into finger, three and five fingers. Welding gloves have strict cosmetic requirements. A-one quality requirements leather thickness uniformity, plump and soft and elastic, leather surface villus meticulous, consistent, fast, and the color depth, no greasy feeling. Second: leather body lack full flexibility, leather face down slightly thick, color shades.

Anti-vibration gloves

To contact vibration, such as forestry, mining, construction, transportation and other departments with handheld vibration tools (such as chain saw, drill, etc.) to prevent oscillation caused by vibration of the occupational disease "white" personal protective equipment. Anti-vibration gloves in structure, mainly in the palm of your hand to add a certain thickness of foam, latex and the air interlayer to absorb vibration, etc. Gasket thickness is thicker, the air content, the more the better the damping. But zhang, the point at which the surface is too thick and easy operation.

Fire retardant gloves

The traditional fire fighter gloves made of asbestos materials, divided into two and five fingers, a large, medium and small three kinds of specifications. Because of asbestos fibers are irritating to human skin, is now rarely used. Now in general use flame retardant canvas or other fire flame retardant fabric making refractory glove, suitable for smelting furnaceman or other furnaces type of work.

Welding gloves fire flame retardant gloves for the environment

Anti-static gloves

Fabric composition containing conductive fiber. Another is by long fiber elastic acrylic knitted gloves, and partially in the palm of your hand TieFu polyurethane resin, or in the tip of the finger part TieFu polyamine resin or gloves on the surface of polyethylene coating.

Gloves made of conductive fiber containing accumulated in the hands of the electrostatic disappear soon. With polyurethane or polyethylene coated gloves mainly is not easy to produce dust and electrostatic. These products are mainly used in weak current, precision instruments, printing, assembly, product inspection, electronic industry in various research institutions, etc.

Fire protective clothing standards

Fire protective clothing (hereinafter referred to as protective clothing) refers to the firefighters during fire fighting to protect their jobs and are usually dressed in clothes.

Performance requirements

Structure

Protective clothing for the imitation safari style, composed by the upload and download.

Protective clothing is divided into conventional-type protective clothing and cold-protective clothing two kinds.

Conventional flame retardant firefighter clothing should be moisture-resistant housing and detachable water permeability of the inner components.

Cold-protective clothing should be flame retardant and moisture resistant jacket detachable water permeability of the inner layer, warm layer, lining layer.


Main material properties

Protective clothing should be used with cover and logo has served the function of fabric, should have flame moisture resistance.

Housing of flame retardant, according to section 5.1 of this standard test method now, its damage length not greater than 12cm, continued burning time shall not be greater than 2s, smoldering time not more than 10s, may not have financial drop phenomenon.

Housings moisture resistance, according to Section 5.2 of this standard test method specified in its wet grade not lower than GB4745 in three requirements.

Resistant housing washing performance, according to the standard method specified in Section 5.3 the corresponding test, the flame retardant is damaged not be longer than 15cm, continued burning time shall not be greater than 5s, smoldering time not more than 20s, may not have financial drop phenomenon, its moisture resistance rating of not less than GB4745 to wet the two requirements.

Cover the tear strength, according to Section 5.4 of this standard test method specified, the warp and weft of the tear strength of not less than 32N.

Housings dry breaking strength, according to Section 5.5 of this standard test method specified in its warp and weft of the breaking strength of not less than 450N.

Cover wear resistance, according to Section 5.6 of this standard test method specified, worn 100 times, warp and weft dry breaking strength of not less than 200N.

Cover against radiant heat permeability, according to the standards specified in Section 5.7 of the test method, upon completion of an irradiation cycle, the temperature rise of the inner surface of the housing should not exceed 15 ℃.

Use protective clothing impervious water has served the function of the inner fabric is made of the performance of its water permeability according to the standards specified in Section 5.8 of the test method, and its resistance to hydrostatic pressure of not less than 4000Pa.

Cold-warm layer of protective clothing, the use of polyester or acrylic flakes made of artificial fur.

Cover seam breaking strength according to Section 5.5 of this standard test method specified, shall not be less than 360N.