Document M422NzLnkoooJQw1Q4bqR57YM

June 15, 1964 TECHNICAL INFORMATION - #8500 FILTER MASK - 1, What is the #8500 Filter Mask? A filter usk, not Just a filter, Bade from textile fibers by e patented process that allows these fibers to function as a filter. This eask is designed for coafortable wearing. The aask was contoured to fit on the nose, slope away froa the aouth and fit under the chin; this type of design will allow a face seel on a greater cross section of face sizes; this aask allows facial, and in particular, aouth aoveaent with ainlaua disruption of the face-to-mask seal. The following comfort measurements will demonstrate why the 3M Mask allows the wearer more comfort than competitive masks. Resistance to Breathing - The lower the value, the easier to breathe. Competitive Masks 3M Mask .13 to .22 inches of water .03 Inches of water The 3M Mask is 4 to 7 times easier to breathe through than the competition. Weight - The lighter the weight, the more comfort. Competitive Masks 3M Mask 12.3 to 93.5 grams 3.8 grams The 3M Mask is 4 to 23 times lighter than the competition. Filter Area - The larger the filter area, the longer the life and the easier to breathe. Competitive Masks 3M Mask 1.9 to 6.0 square Inches 21.2 square inches The 3M Mask filter area is 3 to 11 times larger than the competition. Strap Pressure - The lower the strap pressure, consistent with proper seal, the more comfortable the mask. Competitive Masks 3M Mask 195 to 760 grams of force 137 grams of force The 3M Mask strap pressure is .18 to .70 as much as the competition. Speech Intelligibility Competitive Masks 3M Mask PLAINTIFF'S EXHIBIT iO-- Range from slight to great in muffling sound and greatly restrict mouth movement and speech. The muffling effect from the 3M Mask is slight and the restriction negligible. 3M 039369 Page 2 2. The #8500 Filter Mask functions as a protective system This saik was designed to function against particles in the air as well as particles spewed out by the wearer. There are two methods of testings 1. Use of live people: In this type of test, the test subject actually enters the dust aerosol. The environment of the space inside the mask is coapared to the rooa aerosol and efficiency calculations are computed. The : efficiency range of the competitive masks was 54.8$ to 90.3$ while the 3M Mask efficiency was 90.6$. 2. A static test where the flow of air and dust is one ways This test is a standard method of testing in the industry. We at 3M feel this is not a true measure of the actual use conditions of a filter aask. The 3M Mask has a particulate efficiency under these conditions of 95$. The test dust is magnesium carbonate; the particle size of the dust as sized and counted by microscopic examination was found to be the following! Larger than 10 microns 10 microns to 5 microns Less than 5 microns Less than .1$ 3.4$ 95.8$ The attached graph on normal log paper shows a graphical representation of the above data and allows actual mean particle counts to be obtained for the various size particles. Particles and their slzet i What si2e particle gets into the lungs and stays there? Particles of 5 microns and less will pass through the upper respiratory tract through the cilia and pass into the lung cavities. The smaller these particles are, the deeper they will get into the lungs presenting potential health hazards through deposition. Particles between 5 and 10 microns will pass the upper respiratory tract but are stopped by the cilia; and because of the nature of the cilia, are expelled from the body. Systemic poisons such as lead or arsenic in this size range can thus be absorbed by the body. Particles above 10 microns are stopped in the upper respiratory tract (nasaloral areas). 3M 039370 Page 3 The particle size in Microns of some common industrial dusts are listed belowt Alfalfa Alumina (bauxite) crushed Calcium Carbonate (crushed) Carbon Black Portland Cement Coal (bituminous) Cork Cotton Fertilizer Fiber Glass Flour Mill Fly Ash Ginger Gypsum (crushed) Licorice Lime Oak Plastic Resin Powders Pollen Salt (crushed) Silicon Carbide Soap Powder Soapstone Spray Paint Particle Sulfur Talc Textile Fiber Tobacco Wood Fleur Zinc Oxide figment Tobacco Smoke 10 - 200 0.1 - 200 0.1 - 200 C.l - 10 0.10 - 40 0.1 - 300 10 - 1000 10 - 100 0.3 - 40 2.5 - 30 2 - 1000 0.1 - 100 10 - 200 0.1 - 200 10 - 200 0.1 - 500 50 - 1000 10 - 300 15 - 85 0.10 - 200 1 - 200 10 - 500 .1 - 10 10 - 100 10 - 500 C.l - 10 10 - 200 10 - 200 10 - 50 10 - 50 0.01 - .10 3. Industry Regulations! Where dusts, siists er fuses are a potential health hazard, certain maximum allowable concentrations of these dangerous contaminates in industrial atmospheres are recommended by the American Industrial Governmental Hygienists Conference to reduce the potential health hazard. The AIGHC defines these concentrations as TLV (Threshold Limit Values). Another type af recommendation in use is the MAC (Maximum Allowable Concentration). 1. Threshold Limit Values (TLY)i These values represent time weighted average concentrations for the materials. A man without respiratory protection can probably be exposed to these materials at the allowable concentration during his normal working life without serious health hazards. Most of the values averaged in the TLV may fluctuate a reasonable amount above the recommended TLV, provided an equivalent fluctuation below th* limit occurs. 3M 039371 Page 4 2. Maximum Allowable Concentration (MAC)t The MAC'* are peak concentration* for materials, not averages, and should not be exceeded without respiratory protection during a normal work day. Any variation in concentration should be below the recommended level. In general, it is desirable to Maintain air contaad.netion below the bench aarks by suitable controls. It is always best to reduce exposures to any auterial to the lowest possible level. If the TLV is not exceeded, the potential health hazard can still be reduced further by wearing respiratory protection. In this area no aiask is required, but the 3M Mask does serve a useful function by reducing the probability of potential health hazards; and by reducing the non-toxic particle concentrations, it will increase worker coaifort and perforaance. 4. Where should the #8500 Filter Mask not be used? It should not'be used where the dust, fume or mist concentration of the workers environment exceeds the (TLV) Threshold Limit Values or the (MAC) Maximum Allowable Concentration, 1. This includes particles containing less than l free silica such as asbestos as well as particles containing more than IX free silica such'as quartz. 2. This includes systemic poisons such as arsenic, lead and beryllium, 3. This includes organic solvents such as toluene, carbon tetrachloride or methanol. Prepared by The Safety Products Laboratory Retail Tape 1 Gift Wrap Division Attachments 3M 039372 UX t oX <j V 00 o g O z 3M 039373