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  • Wet wipe

    wet wipe, also known as a wet towelwet onemoist towelettedisposable wipedisinfecting wipe, or a baby wipe (in specific circumstances) is a small to medium-sized moistened piece of plastic[1] or cloth that either comes folded and individually wrapped for convenience or, in the case of dispensers, as a large roll with individual wipes that can be torn off. Wet wipes are used for cleaning purposes like personal hygiene and household cleaning; each is a separate product depending on the chemicals added and medical or office cleaning wipes are not intended for skin hygiene. [2]

    In 2013, owing to increasing sales of the product in affluent countries, Consumer Reports reported that efforts to make the wipes “flushable” down the toilet had not entirely succeeded, according to their test.[3]

    Invention

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    American Arthur Julius is seen as the inventor of wet wipes.[4] Julius worked in the cosmetics industry and in 1957, adjusted a soap portioning machine, putting it in a loft in Manhattan. Julius trademarked the name Wet-Nap in 1958, a name for the product that is still being used. After fine tuning his new hand-cleaning aid together with a mechanic, he unveiled his invention at the 1960 National Restaurant Show in Chicago and in 1963 started selling Wet-Nap products to Colonel Harland Sanders to be distributed to customers of Kentucky Fried Chicken.[5]

    Production

    [edit]

    A wet wipe dispenser

    Ninety percent of wet wipes on the market are produced from nonwoven fabrics made of polyester or polypropylene.[6][failed verification]

    The material is moistened with water or other liquids (e.g., isopropyl alcohol) depending on the applications. The material may be treated with softeners, lotions, or perfume to adjust the tactile and olfactory properties. Preservatives such as methylisothiazolinone are used to prevent bacterial or fungal growth in the package. The finished wet wipes are folded and put in pocket size package or a box dispenser.

    Uses

    [edit]

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    Wet wipes can serve a number of personal and household purposes.[7] Although marketed primarily for wiping infants’ bottoms in diaper changing, it is not uncommon for consumers to also use the product to clean floors, toilet seats, and other surfaces around the home. Parents also use wet wipes, or as they are called for baby care, baby wipes, for wiping up baby vomit and to clean babies’ hands and faces.[8]

    Baby wipes

    [edit]

    Baby wipes are wet wipes used to cleanse the sensitive skin of infants. These are saturated with solutions anywhere from gentle cleansing ingredients to alcohol-based “cleaners”. Baby wipes are typically different pack counts (ranging up to 80 or more sheets per pack), and come with dispensing mechanisms. The origin of baby wipes most likely came in the mid-1950s as more people were travelling and needed a way to clean up on the go. One of the first companies to produce these was a company called Nice-Pak. They made napkin sized paper cloth saturated with a scented skin cleanser.

    An individually-wrapped wet wipe

    The first wet-wipe products specifically marketed as baby wipes, such as Kimberly-Clark‘s Huggies wipes and Procter & Gamble‘s Pampers wipes, appeared on the market in 1990.[9] As the technology to produce wipes matured and became more affordable, smaller brands began to appear.[10] By the 1990s, most super stores like Kmart and Wal-Mart had their own private label brand of wipes made by other manufacturers. After this period there was a boom in the industry and many local brands started manufacturing because of low entry barriers.

    In December 2018, a New Zealand company launched the country’s first ever wet and baby wipe alternative, the BDÉT Foam Wash.

    Toilet wet wipes

    [edit]

    Toilet wet wipes are sometimes preferred to standard toilet paper. Many brands sell toilet wet wipes, claiming they are “flushable”. However, they do not decompose in septic tanks as they are made of polyester or polypropylene. In 2013 a Consumer Reports article said that none of the leading brands could pass their test.[11]

    Personal hygiene

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    Wet wipes are often included as part of a standard sealed cutlery package offered in restaurants or along with airline meals.

    Wet wipes began to be marketed as a luxury alternative to toilet paper by 2005 by companies such as Kimberly-Clark and Procter & Gamble.[12] They are dispensed in the toilets of restaurants, service stations, doctors’ offices, and other places with public use.

    Wet wipes have also found a use among visitors to outdoor music festivals, particularly those who camp, as an alternative to communal showers.[citation needed]

    Cleansing pads

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    Cleansing pads are fiber sponges which have been previously soaked with water, alcohol and other active ingredients for a specific intended use. They are ready to use hygiene products and they are simple and convenient solutions to dispose of dirt or other undesirable elements.

    There are different type of cleansing pads offered by the beauty industry: make-up removing pads, anti-spot treatments and anti-acne pads that usually contain salicylic acid, vitamins, menthol and other treatments.[13]

    Cleansing pads for preventing infection are usually saturated with alcohol and bundled in sterile packages. Hands and instruments may be disinfected with these pads while treating wounds. Disinfecting cleansing pads are often included in first aid kits for this purpose. Since the outbreak of H1N1 sales of individual impregnated wet wipes and gels in sachets and flowpacks have dramatically increased in the UK following the Government’s advice to keep hands and surfaces clean to prevent the spread of germs.

    Wet wipes on a shelf

    Industrial wipes

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    Industrial-strength cleaning wipes are pre-impregnated with a powerful cleaning fluid that cuts through the dirt while the high performance fabric absorbs the residue. They have the ability to clean a vast range of though substances from hands, tools and surfaces, including: grime, grease, oil- and water-based paints and coatings, adhesives, silicone and acrylic sealants, poly foam, epoxy, oil, tar and more.[14]

    Pain relief

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    There are pain relief pads sopping with alcohol and benzocaine. These pads are good for treating minor scrapes, burns, and insect bites. They disinfect the injury and also ease pain and itching.

    Pet care

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    Wet wipes are produced specifically for pet care, for example eye, ear, or dental cleansing pads (with boric acidpotassium chloridezinc sulfatesodium borate) for dogs, cats, horses, and birds.

    Healthcare

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    Medical wet wipes are available for various applications. These include alcohol wet wipes, chlorhexidine wipes (for disinfection of surfaces and noninvasive medical devices), and sporicidal wipes.[15] Medical wipes can be used to prevent the spread of pathogens such as norovirus and Clostridioides difficile.[16]

    Effect on sewage systems

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    Water management companies ask people not to flush wet wipes down toilets, as their failure to break apart or dissolve in water can cause sewer blockages known as fatbergs.[17][18]

    Since the mid-2000s, wet wipes such as baby wipes have become more common for use as an alternative to toilet paper in affluent countries, including the United States and the United Kingdom. This usage has in some cases been encouraged by manufacturers, who have labelled some wet wipe brands as “flushable”. Wet wipes, when flushed down the toilet, have been reported to clog internal plumbing, septic systems and public sewer systems.[19][20][18] The tendency for fat and wet wipes to cling together allegedly encourages the growth of the problematic obstructions in sewers known as “fatbergs”.[21][22] In addition, some brands of wipes contain alcohol, which can kill bacteria and denature enzymes responsible for breaking down solid waste in septic tanks.[23] In the late 2010s, other alternatives such as gel wipe had also come on to the market.[24][25]

    In 2014, a class action suit was filed in the U.S. District Court for the Northern District of Ohio against Target Corporation, and Nice-Pak Products Inc. on behalf of consumers in Ohio who purchased Target-brand flushable wipes. The lawsuit alleged the retailer misled consumers by marking the packaging on its Up & Up brand wipes as flushable and safe for sewer and septic systems. The lawsuit also alleged that the products were a public health hazard because they clogged pumps at municipal waste-treatment facilities.[26] Target and Nice-Pak agreed to settle the case in 2018.[27]

    In 2015, the city of Wyoming, Minnesota, launched a class action suit against six companies, including Procter & Gamble, Kimberly-Clark, and Nice-Pak, alleging they were fraudulently promoting their products as “flushable”.[12][28] The city dropped the lawsuit in 2018 after concluding that the city had not experienced damage to its sewer systems or a rise in maintenance costs.[29] Upon announcement of the withdrawal of the suit, an industry trade group representing the manufacturers of the wipes released a statement that disputed the claims that the products are harmful to sewer systems.

    The withdrawal by the City of Wyoming and last year’s settlement terms of the Perry litigation corroborate what years of testing and field collection studies have shown: flushable wipes are not causing municipal clogs or increased maintenance. To date, despite sensational headlines, no wastewater operator has offered any public evidence that its maintenance issues are impacted by wipes marketed as ‘flushable’ and passing the industry assessment tests.

    — David Rouse, president of INDA, Association of the Nonwoven Fabrics Industry (August 2018)[29]

    In 2019, the industry body Water UK announced a new standard for flushable wet wipes. Wipes will need to pass rigorous testing in order to gain a new and approved “Fine to Flush” logo. As of January 2019, only one product had been confirmed to meet the standard, although there were about seven others in the process of being tested.[30]

  • Laundry detergent

    Laundry detergent is a type of detergent (cleaning agent) used for cleaning dirty laundry (clothes). Laundry detergent is manufactured in powder (washing powder) and liquid form.

    While powdered and liquid detergents hold roughly equal share of the worldwide laundry detergent market in terms of value, powdered detergents are sold twice as much compared to liquids in terms of volume.[1]

    History

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    FEWA, an early laundry detergent from Germany

    From ancient times, chemical additives were used to facilitate the mechanical washing of textile fibers with water. The earliest recorded evidence of the production of soap-like materials dates back to around 2800 BC in ancient Babylon.[2]

    German chemical companies developed an alkyl sulfate surfactant in 1917, in response to shortages of soap ingredients during the Allied Blockade of Germany during World War I.[1][3] In the 1930s, commercially viable routes to fatty alcohols were developed, and these new materials were converted to their sulfate esters, key ingredients in the commercially important German brand FEWA, produced by BASF, and Dreft, the U.S. brand produced by Procter & Gamble. Such detergents were mainly used in industry until after World War II. By then, new developments and the later conversion of aviation fuel plants to produce tetrapropylene, used in household detergents production, caused a fast growth of domestic use in the late 1940s.[3]

    The two forms of laundry detergent: powder and liquid

    Soils

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    Washing laundry involves removing mixed soils from fiber surfaces. From a chemical viewpoint, soils can be grouped into:

    Soils difficult to remove are pigments and dyesfatsresinstarwaxes, and denatured protein.[4]

    Components

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    Laundry detergents may contain builders (50% by weight, approximately), surfactants (15%), bleach (7%), enzymes (2%), soil antideposition agents, foam regulators, corrosion inhibitorsoptical brightenersdye transfer inhibitorsfragrancesdyes, fillers and formulation aids.[4]

    Builders

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    Builders (also called chelating or sequestering agents) are water softeners. Most domestic water supplies contain some dissolved minerals, especially in hard water areas. The metal cations present in these dissolved minerals, particularly calcium and magnesium ions, can react with surfactants to form soap scum which is much less effective for cleaning and can precipitate onto both fabric and washing machine components. Builders remove mineral ions responsible for hard water through precipitationchelation, or ion exchange. In addition, they help remove soil by dispersion.

    Liquid laundry detergents in a Chinese supermarket, April 2020

    The earliest builders were sodium carbonate (washing soda) and sodium silicate (waterglass). In the 1930s phosphates (sodium phosphates) and polyphosphates (sodium hexametaphosphate) were introduced, continuing with the introduction of phosphonates (HEDPATMPEDTMP). While these phosphorus-based agents are generally non-toxic they are now known to cause nutrient pollution, which can have serious environmental consequences. As such they have been banned in many countries, leading to the development of phosphorus-free agents, such as polycarboxylates (EDTANTA), citrates (trisodium citrate), silicates (sodium silicate), gluconic acid and polyacrylic acid; or ion exchange agents like zeolites.

    Alkali builders may also enhance performance by changing the pH of the wash. Hydrophilic fibers like cotton will naturally have a negative surface charge in water, whereas synthetic fibers are comparatively neutral. The negative charge is further increased by the adsorption of anionic surfactants. With increasing pH, soil and fibers become more negatively charged, resulting in increased mutual repulsion. The optimum pH range for good detergency is 9–10.5.[5] Alkalis may also enhance wash performance via the saponification of fats.

    Builder and surfactant work synergistically to achieve soil removal, and the washing effect of the builder may exceed that of the surfactant. With hydrophilic fibers like cottonwoolpolyamide and polyacrylonitrilesodium triphosphate removes soil more effectively than a surfactant alone. It is expected that when washing hydrophobic fibers like polyesters and polyolefins, the effectiveness of the surfactant surpasses that of the builder, however this is not the case.[6]

    Surfactants

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    Main article: Surfactant

    Anionic surfactants: branched alkylbenzenesulfonate, linear alkylbenzenesulfonate, and a soap.

    Surfactants are responsible for most of the cleaning performance in laundry detergent. They provide this by absorption and emulsification of soil into the water and also by reducing the water’s surface tension to improve wetting.

    Laundry detergents contain mostly anionic and non-ionic surfactants. Cationic surfactants are normally incompatible with anionic detergents and have poor cleaning efficiency; they are employed only for certain special effects, as fabric softenersantistatic agents, and biocidesZwitterionic surfactants are rarely employed in laundry detergents mainly for cost reasons. Most detergents use a combination of various surfactants to balance their performance.

    Until the 1950s, soap was the predominant surfactant in laundry detergents. By the end of the 1950s so-called “synthetic detergents” (syndets) like branched alkylbenzene sulfonates had largely replaced soap in developed countries.[7][8] Due to their poor biodegradability these branched alkylbenzenesulfonates were replaced with linear alkylbenzenesulfonates (LAS) in the mid-1960s. Since the 1980s, alkyl sulfates such as SDS have found increasing application at the expense of LAS.

    Since the 1970s, nonionic surfactants like alcohol ethoxylates have acquired a higher share in laundry detergents. In the 1990s, glucamides appeared as co-surfactants, and alkyl polyglycosides have been used in specialty detergents for fine fabrics.[4]

    Bleaches

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    Main article: Bleach

    Despite the name, modern laundry bleaches do not include household bleach (sodium hypochlorite). Laundry bleaches are typically stable adducts of hydrogen peroxide, such as sodium perborate and sodium percarbonate; these are inactive as solids but will release hydrogen peroxide upon exposure to water. The main targets of bleaches are oxidisible organic stains, which are usually of vegetable origin (e.g. chlorophyllanthocyanin dyes, tanninshumic acids, and carotenoid pigments). Hydrogen peroxide is insufficiently active as a bleach at temperature below 60 °C (140 °F), which traditionally made hot washes the norm. The development of bleach activators in the 1970s and 1980s allowed for cooler washing temperatures to be effective. These compounds, such as tetraacetylethylenediamine (TAED), react with hydrogen peroxide to produce peracetic acid, which is an even more effective bleach, particularly at lower temperatures.[4]

    Enzymes

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    Main article: Detergent enzymes

    The use of enzymes for laundry was introduced in 1913 by Otto Rohm. The first preparation was a pancreatic extract obtained from slaughtered animals, which was unstable against alkali and bleach. Only in the latter part of the century with the availability of thermally robust bacterial enzymes did this technology become mainstream.

    Enzymes are required to degrade stubborn stains composed of proteins (e.g., milk, cocoa, blood, egg yolk, grass), fats (e.g., chocolate, fats, oils), starch (e.g., flour and potato stains), and cellulose (damaged cotton fibrils, vegetable and fruit stains). Each type of stain requires a different type of enzyme: proteases (savinase) for proteins, lipases for greases, α-amylases for carbohydrates, and cellulases for cellulose.

    Other ingredients

    [edit]

    Many other ingredients are added depending on the expected circumstances of use. Such additives modify the foaming properties of the product by either stabilizing or counteracting foam. Other ingredients increase or decrease the viscosity of the solution, or solubilize other ingredients. Corrosion inhibitors counteract damage to washing equipment. Dye transfer inhibitors prevent dyes from one article from coloring other items, these are generally polar water-soluble polymers such as polyvinylpyrrolidone, to which the dyes preferentially bind. Antiredeposition agents such as carboxymethyl cellulose are used to prevent fine soil particles from reattaching to the product being cleaned.[4] Commercial or industrial laundries may make use of a laundry sour during the final rinse cycle to neutralise any remaining alkali surfactants and remove acid-sensitive stains.

    A number of ingredients affect aesthetic properties of the item to be cleaned or the detergent itself before or during use. These agents include optical brightenersfabric softeners, and colorants. A variety of perfumes are also components of modern detergents, provided that they are compatible with the other components and do not affect the color of the cleaned item. The perfumes are typically a mixture of many compounds, common classes include terpene alcohols (citronellolgeraniollinaloolnerol) and their esters (linalyl acetate), aromatic aldehydes (helionalhexyl cinnamaldehydelilial) and synthetic musks (galaxolide).

    Market

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    Worldwide, while liquid and powdered detergents hold roughly equal market share in terms of value, powdered laundry detergent is more widely used. In 2018, sales of powdered detergent measured 14 million metric tons, double that of liquids. While liquid detergent is widely used in many Western countries, powdered detergent is popular in Africa, India, China, Latin America, and other emerging markets. Powders also hold significant market share in eastern Europe and in some western European countries due to their advantage over liquids in whitening clothes. According to Desmet Ballestra, designer and builder of chemical plants and detergent-making equipment, powdered detergents have a 30–35% market share in western Europe. According to Lubrizol, the powdered detergent market is growing by 2 percent annually.[1]

    Environmental concerns

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    Phosphates in detergent became an environmental concern in the 1950s and the subject of bans in later years.[9] Phosphates make laundry cleaner but also cause eutrophication, particularly with poor wastewater treatment.[10]

    A 2013 academic study of fragranced laundry products found “more than 25 VOCs emitted from dryer vents, with the highest concentrations of acetaldehyde, acetone, and ethanol. Seven of these VOCs are classified as hazardous air pollutants (HAPs) and two as carcinogenic HAPs (acetaldehyde and benzene)”.[11]

    The EEC Directive 73/404/EEC stipulates an average biodegradability of at least 90% for all types of surfactants used in detergents. The phosphate content of detergents is regulated in many countries, e.g., Austria, Germany, Italy, the Netherlands, Norway, Sweden, Switzerland, United States, Canada, and Japan.