Personal Protective Equipment

Personal protective equipment (PPE) refers to specialized garments or accessories such as clothing, helmets, gloves and so forth that fulfil a protective function against various hazards, mechanical or chemical, when worn by workers.

From: Smart Textiles and their Applications , 2016

Personal Protective Equipment

Ian Sutton , in Plant Design and Operations (Second Edition), 2017

Abstract

Personal protective equipment (PPE) is a clothing or an equipment worn by workers to protect them from fire, chemicals, or physical impact. PPE should only be used when engineering designs and operating or maintenance practices do not provide a sufficiently safe work environment. PPE represents a last line of defense. It is always preferable to design a facility so that hazards are not present, or, failing that, to ensure that workers cannot be exposed to the hazards. This chapter provides an overview of different types of PPE, including special clothing and protection for the head, hands, feet and eyes. Also discussed are respiratory and fall protection.

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Poly(phenylene ether)s

Johannes Karl Fink , in High Performance Polymers (Second Edition), 2014

4.2.4.2 Treatment with Vinyl Compounds

Functionalized PPE may be prepared by allowing PPE to react with a species that contains both a C C bond and a reactive moiety, such as hydroxyl, acid, anhydride, amine, imide, epoxy, etc. Examples of species of the acid type and anhydride type include maleic anhydride, fumaric acid, and citraconic anhydride [25].

For blending PPE with resin systems that involve curing or polymerization reactions, including radical reactions, it is desirable to operate with a PPE that contains residual aliphatic unsaturation and capped phenolic end groups at the same time. In order to achieve convenient distribution in another matrix, the PPE-type should exhibit a low viscosity.

Unsaturated moieties can be introduced by the reaction of the hydroxyl groups of PPE with methacrylic anhydride which is conducted in a toluene solution. 4-Dimethylaminopyridine or 4-dimethylbutylamine serves as a catalyst [26]. The capping reaction is shown in Figure 4.4.

Figure 4.4. Capping reaction of poly(phenylene ether) with methacrylic anhydride.

The ester formation occurs between a phenolic end group of the PPE and a carboxylic group of the methacrylic anhydride. A highly efficient capping with respect to aliphatic unsaturation can be readily achieved. Instead of toluene, the capping reaction can be performed in a styrene monomer. The mixture can be used for further thermosetting. When the capped PPE does not need to be isolated by a further process, a reduction in color is observed [31].

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DATA ON SPECIFIC POLYMERS

George Wypych , in Handbook of Material Weathering (Sixth Edition), 2018

14.29.2 EFFECT OF THERMAL HISTORY

PPE is stable under vacuum and nitrogen up to 300°C but it degrades when heated in oxygen. Side chain peroxides, which increase the rate of photolysis, are formed by thermal oxidation.

PPE undergoes Fries-type rearrangement according to the following reaction:

The methylene bridge was not directly observed by chemical procedure but was assumed from the distribution of scission products recovered after thermal degradation. 3 It is assumed that the rearrangement occurs below the decomposition temperature. Computer simulation of these rearrangement reactions and analysis of degraded PPE shows that 78% of all bridges are methylene bridges and only 22% are ether bridges. 3

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Wearable technologies for personal protective equipment

J. Decaens , O. Vermeersch , in Smart Textiles and their Applications, 2016

23.1 Introduction

Personal protective equipment (PPE) refers to specialized garments or accessories such as clothing, helmets, gloves and so forth that fulfil a protective function against various hazards, mechanical or chemical, when worn by workers. Fit and comfort are essential when choosing a PPE since it will impact the protective performance as well as the mobility of the wearer who may expose himself to higher hazards by tripping or falling. PPE can be classified into different categories depending on the body areas that require protection ( Brauer, 2006):

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Eye and face

•

Head

•

Foot and leg

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Hand and arm

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Body

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Hearing

23.1.1 The need for wearable devices in PPE

High-risk situations that involve wearing PPE are often a source of stress for the workers who are subject to dramatic increases in temperature, heart rate and respiratory rate. Therefore, it is necessary to monitor their physiological signs in order to avoid accidents and to be able to alert co-workers. In addition, the adrenaline rush has also as a consequence to trick the wearer's senses regarding the exterior environment. It has been reported (Kantor and Brown, 1996) that many firemen suffer from burns after exposing themselves for an extended period to high temperature without feeling the heat. This example raises concerns about the awareness of the wearer regarding his surroundings and demonstrates the need for PPE to be equipped with temperature and humidity sensors. Ideally, the PPE should be able to monitor itself as well and detect any failure to fulfil its protective function.

23.1.2 Various levels of integration

The addition of wearable devices should not impede the comfort of the PPE or the mobility of the wearer. Therefore, a high level of integration is expected but is not always met. Indeed, the level of intimacy between the electronic components and the textile substrate can be classified in three categories:

1.

A low level of integration implies that the wearable device is added during the last step of manufacturing – the assembly.

2.

A medium level of integration indicates that the functional components are directly embedded within the fabric.

3.

A high level of integration entails the incorporation of the active elements within the fibres themselves.

Increasing the level of interweaving between the components of the wearable device and the PPE can be achieved by acting backward on the manufacturing process steps. However, the level of difficulty also increases and can raise further challenges, such as durability after washing cycles, since the functional elements are no longer removable.

23.1.3 Projects around the world

Many research projects have already been led around the world with the purpose of integrating wearable devices into protective equipment, mainly to be able to monitor physiological parameters but also to replace bulky and heavy electronic devices that are usually added to the uniforms. In Europe, for example, project Propsie aimed to develop an inbuilt cooling system and physiological sensors to evaluate the thermal status of the worker. The same year, the [email protected] project was launched with the objective of integrating sensors within an outer garment, fully waterproof, in order to detect falling overboard.

Despite the significant public funding in this area, there have been very few commercialized products. In the United States, Globe Firefighters 'WASP' systems became available for select training in 2013 (Dalsgaard and Sterrett, 2014). In France, the Sagem's FELIN system finally reached the production phase and has started to equip regiments in 2015. In order to facilitate the arrival of new products on the market, issues of regulation, standardization and public procurement in the PPE industry must still be addressed.

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Protective clothing for cold workplace environments

Holmér I. , in Textiles for Cold Weather Apparel, 2009

15.2 Directives and standards

Personal protective equipment for workplaces are regulated in Europe by two Directives. Directive 89/656 (1989) contains minimum health and safety requirements for the use by workers of personal protective equipment at the workplace. Directive 89/686 (1989) contains regulations related to the manufacturing, testing and marketing of personal protective equipment. Several international standards have been developed for testing of clothing against cold and foul weather and classification of their protective performance.

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EN 342 (2004) Protective clothing – Ensembles for protection against cold.

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EN 343 (2004) Protective clothing – Protection against rain.

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EN 511 (2005) Protective gloves against cold.

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EN 14058 (2005) Protective clothing – Garments for protection against cool environments.

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EN 14360 (2005) Protective clothing against rain – Test method for ready made garments – Impact from above with high energy droplets.

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ISO EN 15831 (2003) Thermal manikin for measuring the resultant basic thermal insulation.

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ISO EN 9237 Textiles – Determination of permeability of fabrics to air.

The most important physical properties for determining a clothing ensemble is its protective performance in cold environments are

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thermal insulation

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water vapour resistance

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permeability to air

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permeability to water.

The methods for measurement of these properties are described elsewhere in this book. Thermal insulation is measured on a complete ensemble with a standing or walking thermal manikin (EN 342, ISO 15831). The insulation value is presented in the marking of the clothing (EN 342). This insulation value in EN 342 is a resultant insulation value (I cl,r), i.e., it is determined under the influence of wind and walking movements. The standard, basic insulation value (I cl) is measured with a standing manikin in calm air. This is the value found in most literature (see Table 15.1). Normally, sweating is quite limited under cold conditions. At high activity levels, however, sweating and evaporative heat exchange may become important. The water vapour resistance value of the ensemble is then important for heat exchange. For an overall assessment of the cold protection, the permeability of the outer layer to air and water is important as well. Wind and water penetrating the outer layer into deeper layers may significantly reduce the insulation value. Table 15.1 provides basic insulation values for selected clothing ensembles.

Table 15.1. Basic insulation values (I cl) of selected garment ensembles measured with a thermal manikin

Clothing ensemble I cl m2°C/W clo
1. Briefs, shirt, fitted trousers, socks, shoes 0.10 0.6
2. Briefs, shirt, coverall, socks, shoes 0.13 0.8
3. Briefs, shirt, trousers, smock, socks, shoes 0.14 0.9
4. Briefs, undershirt, shirt, overall, calf length socks, shoes 0.16 1.0
5. Briefs, shirt, trousers, vest, jacket, socks, shoes 0.17 1.1
6. Briefs, shirt, trousers, vest, coverall, socks, shoes 0.19 1.3
7. Underpants, undershirt, insulated trousers, insulated jacket, socks, shoes 0.22 1.4
8. Briefs, T-shirt, shirt, fitted trousers, insulated coverall, calf length socks, shoes 0.23 1.5
9. Underpants, undershirt, shirt, trousers, cardigan, coat, hat, gloves, socks, shoes 0.25 1.6
10. Underpants, undershirt, shirt, trousers, cardigan, coat, overtrousers, socks, shoes 0.29 1.9
11. Underpants, undershirt, shirt, trousers, cardigan, coat, overtrousers, socks, shoes, hat, gloves 0.31 2.0
12. Undershirt, underpants, insulated trousers, insulated jacket, overtrousers, overjacket, socks, shoes 0.34 2.2
13. Undershirt, underpants, insulated trousers, insulated jacket, overtrousers, coat, socks, shoes, hat, gloves 0.40 2.6
14. Undershirt, underpants, insulated trousers, insulated jacket, overtrousers, parka, socks, shoes, hat, gloves 0.46 3.0
15. Undershirt, underpants, insulated trousers, insulated jacket, down overtrousers, down parka, socks, shoes, hat, gloves 0.46 3.8
16. Polar clothing systems 0.46–0.70 3–4.5
17. Sleeping bags 0.46–1.4 3–9

(modified from ISO-11079, 2007)

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Health and Safety

Steven E. Hughes , in A Quick Guide to Welding and Weld Inspection, 2009

Personal protective equipment (PPE)

PPE is defined in the Personal Protective Equipment at Work Regulations (1992) as 'all equipment (including clothing affording protection against the weather) which is intended to be worn or held by a person at work and which protects him against one or more risks to his health or safety'. Hearing protection and respiratory protective equipment are not covered by these regulations because other regulations apply to them, but they do need to be compatible with any other PPE provided. The main requirement of the regulations is that PPE is to be supplied and used at work wherever there are risks to health and safety that cannot be adequately controlled in other ways and that it is:

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Properly assessed before use to ensure it is suitable.

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Maintained and stored properly.

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Provided with instructions on how to use it safely.

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Used correctly by employees.

Arc welding can cause injury in many ways so the correct PPE protection is essential and includes:

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Fire retardant overalls to protect skin from burns caused by the powerful visible and ultraviolet light emitted. They also protect from spatter (globules of burning metal) which is thrown out during welding.

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Gloves to protect hands from burns from hot metal.

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A welding mask with dark filter where the mask itself can afford direct protection from fumes and spatter. The correct grade of filter will protect the eyes from the visible and ultraviolet (UV) light emitted from the welding arc. This UV light can lead to a severe eye irritation called 'arc eye' (which feels like sand has been thrown into your eyes). Any welder who has experienced arc eye will tell you how painful it is and how little they would wish to repeat the experience.

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Boots with steel toecaps to protect from falling objects.

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Goggles/face mask for eye protection when grinding or chipping.

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Gaiters and spats can give protection from burning metal or spatter falling into boots and burning feet. Otherwise, ensure overalls are outside boots.

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A leather apron may be required depending on the process used.

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A welder's hat is especially useful when performing overhead welding.

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Mold Following Hurricanes and Floods

R. Dodge Woodson , in Construction Hazardous Materials Compliance Guide: Mold Detection, Abatement and Inspection Procedures, 2012

Hygiene

Disposable PPE should be discarded after it is used. Such equipment should be placed into impermeable bags and usually can be discarded as ordinary construction waste. Appropriate precautions and protective equipment for biocide applicators should be selected on the basis of the product manufacturer's warnings and recommendations (e.g., goggles or face shield, aprons or other protective clothing, gloves, and respiratory protection). Reusable protective clothing should be cleaned according to the manufacturers' recommendations after the product has been exposed to mold. Hands should be washed with clean potable water and soap after gloves are removed.

Health officials should consider whether their agencies should supply PPE to residents who might not otherwise be able to acquire the necessary equipment. Providing PPE to the local population would require substantial resources and a mechanism for distributing them.

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Nonwovens in specialist and consumer apparel

B.J. Collier , in Applications of Nonwovens in Technical Textiles, 2010

7.6.1 Personal protective equipment

Personal protective equipment (PPE) is used, or required, for a wide range of industrial or personal activities. Equipment can range from hard hats to fire extinguishers. Apparel for such activities is of great importance because it covers so much of the body and can provide the degree of protection suitable for a specific pursuit or workplace environment.

Nonwoven materials have been prominent in PPE for many years. In the 1970s DuPont's Tyvek® was used to construct coveralls and aprons for mechanics, painters, and other industrial workers. The heat bonded fabric of nonabsorbent polyethylene did not absorb liquids, thus protecting the wearer from spills and splashes. The small fibers in the nonwoven structure also trapped particulates. It had a slippery surface and somewhat stiff hand, properties that dictated the types of protective apparel in which it was used. Style features were simple, keeping the cost of garment construction low.

Nonwovens have made the leap to garments with barrier properties beyond those of these first materials. Coveralls and body suits are made from nonwovens and laminates with varying levels of resistance to permeation, penetration, and degradation by hazardous substances. 10 At the lower end of cost and level of protection are the flashspun polyethylene fabrics. The standard for many applications is rapidly becoming layered SMS fabrics. The nonwoven SMS can be used in different weights to provide the level of protection needed and it can also be a supporting substrate for microporous films. The film laminates have increased barrier protection.

A range of garment styles and features enables those selecting protective garments to obtain the appropriate level of protection for the hazard anticipated. For some types of exposure, coveralls with detached gloves and hoods may be sufficient. For others, hard hats and respirators may be needed. The body suit can be made with attached socks, so that there is no penetration at the ankle. Two considerations in design are facilitating donning and doffing the garment and providing ease of movement without bulk. Back zippers are common as closures and can be covered by a strip of material called a 'storm flap'. The flap is an added protection against penetration. The garments are cut large enough for the wearer to perform any necessary physical movements and also to be worn over an inner layer of clothing. This inner layer can be normal wearing apparel, regular or long underwear, or a nonwoven – usually spunlace – garment.

At the high end of PPE is the totally encapsulated chemically protective suit (TECP suit), which must maintain a fixed positive pressure thereby inhibiting penetration. 10 In this case, the garment style and structural details (seams and closures) become as important as the fabric itself. All parts of the body must be enclosed in the ensemble, including head, hands and feet. Gloves and boots are attached or sealed to the suit in some manner; a respirator must be worn and is enclosed in the suit. Again, construction elements are kept to a minimum.

As the complexity of the suits and the level of barrier protection increases, so does the cost. It can range from less than US$5 for basic Tyvek® coveralls to over US$1,000 for a TECP suit.

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Design issues in military footwear and handwear

G. Torrens , ... W. Tutton , in Advances in Military Textiles and Personal Equipment, 2012

7.5.2 Interoperability of personal protective equipment (PPE) systems

Extremities PPE have some specialist requirements that can be affected by other clothing and protective systems. In particular, regions where clothing and PPE extremities overlap (ankle and wrist) are problematic when trying to maintain the effectiveness of each system. In conventional designs of clothing and PPE systems the sealing of the ankle to the trouser would appear not to have been considered an issue. However, ingress of water, grit and mud will have a serious effect on the performance of a soldier's boot and, subsequently, their foot. Similarly, ingress of contaminants will affect their gloves and hands. The overlap of clothing systems and extremities PPE has to be managed, to ensure that clothing does not interfere with the function of the PPE or task performance and to avoid de-gloving.

Hook and loop systems and overlapping layers are the conventions currently used to maintain protection over the vulnerable areas of ankle and wrist. One method of ensuring that multilayered thermal protection of the upper limb and associated handwear fits together is to define a cone of fit. The shape of the cone will depend on measurement of the smallest wrist circumference compared with the maximum number of layers that will cover the wrist (e.g. blouse, combat jacket and chemical, biological, radiological and nuclear (CBRN) overalls). From the authors' experience and that documented by Williams (2007), the length of the cone should be 120   mm (measured from the first wrist crease). This length is the optimum before the cone would begin to be noticeably affected by the muscle belly of the forearm of the smallest user (see Fig. 7.8).

7.8. The cone of fit for handwear, where the circumference of the smallest wrist is matched to the wrist and the maximum circumference matched to the wrist, plus the maximum number of outer layers of clothing.

A functional task-based assessment is recommended to ensure that the measured interface is effective and does not limit task performance or cause the user frustration when used.

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Safety while maintenance

Neeraj Niijjaawan , Rasshmi Niijjaawan , in Modern Approach to Maintenance in Spinning, 2010

9.5.9 Personal protective equipment

The primary goal of every mill management is the total removal of hazards at the source but 100% removal has not been possible. In many situations, such as sudden failure of equipments and machineries, and during scheduled preventive maintenance, workers do get exposed to hazards. Under such circumstances, we are left with no alternative but to use personal protective equipments (PPEs). These equipments do not eliminate injury but help to minimize injury. PPE is defined in the Regulations as 'any equipment (including clothing affording protection against the weather) which is intended to be worn or held by a person at work and which protects him against one or more risks to health or safety', e.g., safety helmets, gloves, eye protection, high-visibility clothing, safety footwear and safety harnesses.

Personal protective equipment must be selected depending upon the following requirements:

(a)

Nature of the hazard

(b)

Severity of the hazard

(c)

Type of contaminant

(d)

Concentration of the contaminants

(e)

Duration or work

(f)

Location of the contaminated area with respect to a source of respirable air

(g)

Expected activity of the wearer

(h)

Operating characteristic and limitations of the equipment

(i)

Reliability of the equipment

(j)

Acceptance of the wearer

1 Worker dress

Proper working dress is an important factor for safety while working on any machine because many accidents occur owing to loose clothing and/or hanging sleeves getting caught into the moving parts. Long hair, rings and jewellery items can also get caught and cause accidents while working on the machine. It is always better to have a dress with short sleeves, shirt tucked in, no loose cuff on shirt or trousers. If one has a long hair, one must roll it up or put it under a cap so that it does not get entangled in any machine.

2 Eye and face protection

Eyes are exposed to a variety of hazards in a spinning mill. Some of them are

(a)

Impact of flying particles during chipping, grinding, scaling and other similar operations.

(b)

Dust and mist while cleaning of machines in blowroom, cards and winding, etc.

(c)

Splashing of liquids such as any adhesive or lubricants.

(d)

Harmful radiation, glare, reflected light during gas or arc welding and cutting work.

Most commonly used equipments for eye protection are gas tight rubber goggles, plastic face shield and welding hand shield.

3 Ear protection

Noise has become a major problem in modern mills.

Noise not only impairs hearing but also affects the nervous system. Ear protectors fall in two groups: ear plug and ear muff. These, when properly fitted and used, can reduce noise level by 30–40   dB.

The severity of noise pollution depends upon the intensity of noise and its duration. High speed machines produce lot of noise which affect working efficiency and may cause deafness if exposed to it for long duration. Noise increases the blood pressure, the heart beats and the breathing rate which may lead to heart disease. Exposure to sound level below 70   dBA can assumed to be safe. Table 9.2 gives exposure limit for noise levels.

Table 9.2. Exposure limit for noise levels

Sound level (dBA) Duration (h)
90 8
92 6
95 4
97 3
100 2
102 1.5
105 1
107 0.75
110 0.5
115 0.25

Exposure to sound of more than 115   dBA to unprotected ears is harmful.

4 Head protection

Safety helmets provide very good protection to the head from injury from falling bodies, flying objects, electrical shock, etc. Helmets not only protect the head but also protect the neck, the face and the back to same extent.

Helmets are made of various materials like reinforced plastic, aluminium alloy, etc. Spinning mills, mainly, use HDPE helmets because of their superior resistance. All such helmets are designed for an impact load of 40 foot pounds. Secondly, protective caps are used to protect the hair from coming in contact with the moving parts of machinery. They also protect the hair from dust, dirt and other undesirable contacts.

5 Hands and arm protection

1. Hand protection is next in priority, since this part of the body is employed in carrying out most of work. Gloves are commonly used as protective equipment. They are generally made of rubber, PVC, leather or cotton canvas. Hand gloves must be used in handling a lubricant, detergent or any thing that can damage the eye or the skin. If any of these come in contact with eye or skin, wash immediately the affected part with water as first aid and then get proper medical treatment.

6 Foot protection

One must wear shoes with non-skid soles, as foot injuries are mostly caused by falling objects while handling heavy materials, or by puncture from nails or by sharp objects, etc.

7 Respiratory protection

One should put on face mask while cleaning dust with compressed air to avoid inhaling of dust particles.

8 General protection

For working at heights of more than 10   ft, one should wear safety belts. Belts are generally made of cotton webbing and leather. Resistance to impact loading on webbing is three or four times greater than leather of the same size. All safety belts should be capable of withstanding a tensile load of 1800   kg without breaking or without causing permanent deformation.

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