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| ==Varieties== | ==Varieties== | ||
| Many modern ] have a dispenser which can add liquid fabric softener to the load of laundry automatically on the final rinse; in ]s it may need to be added manually. Some brands of washing powder have fabric conditioning mixed in which is claimed to save money when compared to buying ordinary washing powder and fabric softener separately. Some manufacturers claim their products make ] easier and/or make clothes dry faster. All liquid fabric softeners are designed to be added to water |
Many modern ] have a dispenser which can add liquid fabric softener to the load of laundry automatically on the final rinse; in ]s it may need to be added manually. Some brands of washing powder have fabric conditioning mixed in which is claimed to save money when compared to buying ordinary washing powder and fabric softener separately. Some manufacturers claim their products make ] easier and/or make clothes dry faster. All liquid fabric softeners are designed to be added to water – either by adding the product directly to the final rinse water or by 2:1 (water:softener) dilution in an automatic dispenser. Even diluted fabric softener will cause spotting when poured directly onto clothes and can ruin them. | ||
| Dry fabric softeners typically come in the form of dryer sheets, which are added to clothing in the ] to soften the fabric and prevent buildup of static electricity in susceptible fabrics. Many alternative uses of dryer sheets have been suggested by users<ref>{{cite web|url=http://www.bouncesheets.com/en_US/cleveruses/index.jsp |title=Bounce Everywhere |publisher=Bouncesheets.com |date= |accessdate=2009-06-04}}</ref> such as dusting, and removing hair from clothes.<ref>{{cite web|url=http://www.fourgreensteps.com/infozone/sustainability/-20-household-uses-for-used-yes-used-dryer-sheets|title=20 Household uses for used, yes, used dryer sheets|publisher=Four Green Steps|accessdate=2011-05-06}}</ref> | Dry fabric softeners typically come in the form of dryer sheets, which are added to clothing in the ] to soften the fabric and prevent buildup of static electricity in susceptible fabrics. Many alternative uses of dryer sheets have been suggested by users<ref>{{cite web|url=http://www.bouncesheets.com/en_US/cleveruses/index.jsp |title=Bounce Everywhere |publisher=Bouncesheets.com |date= |accessdate=2009-06-04}}</ref> such as dusting, and removing hair from clothes.<ref>{{cite web|url=http://www.fourgreensteps.com/infozone/sustainability/-20-household-uses-for-used-yes-used-dryer-sheets|title=20 Household uses for used, yes, used dryer sheets|publisher=Four Green Steps|accessdate=2011-05-06}}</ref> | ||
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| Contemporary fabric softeners tend to be based on ] salts with one or two long ] chains, a typical compound being ].<ref>{{cite web|url=http://www.henkelconsumerinfo.com |title=Henkel Consumer Info |publisher=Henkelconsumerinfo.com |date= |accessdate=2009-06-04}}</ref> Other cationic compounds can be derived from ], substituted amine salts, or quaternary ] ammonium salts. One of the most common compounds of the early formulations was ] (DHTDMAC). | Contemporary fabric softeners tend to be based on ] salts with one or two long ] chains, a typical compound being ].<ref>{{cite web|url=http://www.henkelconsumerinfo.com |title=Henkel Consumer Info |publisher=Henkelconsumerinfo.com |date= |accessdate=2009-06-04}}</ref> Other cationic compounds can be derived from ], substituted amine salts, or quaternary ] ammonium salts. One of the most common compounds of the early formulations was ] (DHTDMAC). | ||
| Anionic softeners and ]s can be, for example, salts of mono]s and diesters of ] and the ]s. These are often used together with the conventional cationic softeners. Cationic softeners are incompatible with anionic ]s used in detergents because they combine with them to form a solid precipitate. So, they must instead be added during the rinse cycle. Anionic softeners can be combined with anionic surfactants directly. Other anionic softeners can be based on ] clays. Some compounds, such as ] phosphate esters, have softening, anti-static, and surfactant properties.<ref>{{cite web|url=http://www.freepatentsonline.com/4118327.html |title=Fabric softener and anti-static compositions |
Anionic softeners and ]s can be, for example, salts of mono]s and diesters of ] and the ]s. These are often used together with the conventional cationic softeners. Cationic softeners are incompatible with anionic ]s used in detergents because they combine with them to form a solid precipitate. So, they must instead be added during the rinse cycle. Anionic softeners can be combined with anionic surfactants directly. Other anionic softeners can be based on ] clays. Some compounds, such as ] phosphate esters, have softening, anti-static, and surfactant properties.<ref>{{cite web|url=http://www.freepatentsonline.com/4118327.html |title=Fabric softener and anti-static compositions – Patent 4118327 |publisher=Freepatentsonline.com |date=1977-03-28 |accessdate=2009-06-04}}</ref> | ||
| The softening compounds differ in affinity to different materials. Some are better for ]-based fibers, others have higher affinity to hydrophobic materials like ], ], ], etc. ]-based compounds such as ] comprise the new softeners which work by lubricating the fibers. Derivatives with amine- or amide-containing functional groups are used as well. These groups help the softeners bind better to fabrics. | The softening compounds differ in affinity to different materials. Some are better for ]-based fibers, others have higher affinity to hydrophobic materials like ], ], ], etc. ]-based compounds such as ] comprise the new softeners which work by lubricating the fibers. Derivatives with amine- or amide-containing functional groups are used as well. These groups help the softeners bind better to fabrics. | ||
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| As the softeners themselves are often of hydrophobic nature, they are commonly occurring in the form of an ]. In the early formulations, ]s were used as ]s. The emulsions are usually opaque, milky fluids. However there are also ]s where the droplets of the hydrophobic phase are substantially smaller{{Nonspecific|date=August 2011}}. The advantage of microemulsions is in the increased ability of the smaller particles to penetrate into the fibers. A mixture of cationic and non-ionic surfactants is often used as an emulsifier. Another approach is using a polymeric network, an emulsion polymer. | As the softeners themselves are often of hydrophobic nature, they are commonly occurring in the form of an ]. In the early formulations, ]s were used as ]s. The emulsions are usually opaque, milky fluids. However there are also ]s where the droplets of the hydrophobic phase are substantially smaller{{Nonspecific|date=August 2011}}. The advantage of microemulsions is in the increased ability of the smaller particles to penetrate into the fibers. A mixture of cationic and non-ionic surfactants is often used as an emulsifier. Another approach is using a polymeric network, an emulsion polymer. | ||
| Other compounds are included to provide additional functions; acids or bases for maintaining the optimal ] for adsorption to the fabric, electrolytes, carriers (usually water, sometimes water-alcohol mixture), and others, e.g. silicone-based ]s, emulsion stabilizers, fragrances, and colors.<ref>{{cite web|url=http://www.patentstorm.us/patents/5643865-claims.html |title=Concentrated biodegradable quaternary ammonium fabric softener compositions containing quaternary ammonium compounds with short fatty acid alkyl chains |
Other compounds are included to provide additional functions; acids or bases for maintaining the optimal ] for adsorption to the fabric, electrolytes, carriers (usually water, sometimes water-alcohol mixture), and others, e.g. silicone-based ]s, emulsion stabilizers, fragrances, and colors.<ref>{{cite web|url=http://www.patentstorm.us/patents/5643865-claims.html |title=Concentrated biodegradable quaternary ammonium fabric softener compositions containing quaternary ammonium compounds with short fatty acid alkyl chains – US Patent 5643865 Claims |publisher=Patentstorm.us |date= |accessdate=2009-06-04}}</ref> A relatively recent form on the market are the ultra-concentrates, where the amount of carriers and some other chemicals is substantially lower and much smaller volumes are used. | ||
| ==References== | ==References== | ||
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Fabric softener (also called fabric conditioner) is a conditioner used to prevent static cling and make fabric softer. It is available as a liquid, crystals, and dryer sheets.
Varieties
Many modern washing machines have a dispenser which can add liquid fabric softener to the load of laundry automatically on the final rinse; in launderettes it may need to be added manually. Some brands of washing powder have fabric conditioning mixed in which is claimed to save money when compared to buying ordinary washing powder and fabric softener separately. Some manufacturers claim their products make ironing easier and/or make clothes dry faster. All liquid fabric softeners are designed to be added to water – either by adding the product directly to the final rinse water or by 2:1 (water:softener) dilution in an automatic dispenser. Even diluted fabric softener will cause spotting when poured directly onto clothes and can ruin them.
Dry fabric softeners typically come in the form of dryer sheets, which are added to clothing in the tumble dryer to soften the fabric and prevent buildup of static electricity in susceptible fabrics. Many alternative uses of dryer sheets have been suggested by users such as dusting, and removing hair from clothes.
How it works
Fabric softeners work by coating the surface of the cloth fibers with a thin layer of chemicals; these chemicals have lubricant properties and are electrically conductive, thus making the fibers feel smoother and preventing buildup of static electricity. Other functions are improvements of iron glide during ironing, increased resistance to stains, and reduction of wrinkling and pilling.
Cationic softeners bind by electrostatic attraction to the negatively charged groups on the surface of the fibers and neutralize their charge; the long aliphatic chains are then oriented towards the outside of the fiber, imparting lubricity. Vinegar works on some materials in a similar way, as the hydrogen ions bind to the anionic groups on the fibers.
Composition
The earliest fabric softeners were developed during early 20th century to counteract the harsh feel which the drying methods imparted to cotton. The cotton softeners were typically based on water emulsion of soap and olive oil, corn oil, or tallow oil.
Contemporary fabric softeners tend to be based on quaternary ammonium salts with one or two long alkyl chains, a typical compound being dipalmitoylethyl hydroxyethylmonium methosulfate. Other cationic compounds can be derived from imidazolium, substituted amine salts, or quaternary alkoxy ammonium salts. One of the most common compounds of the early formulations was dihydrogenated tallow dimethyl ammonium chloride (DHTDMAC).
Anionic softeners and antistatic agents can be, for example, salts of monoesters and diesters of phosphoric acid and the fatty alcohols. These are often used together with the conventional cationic softeners. Cationic softeners are incompatible with anionic surfactants used in detergents because they combine with them to form a solid precipitate. So, they must instead be added during the rinse cycle. Anionic softeners can be combined with anionic surfactants directly. Other anionic softeners can be based on smectite clays. Some compounds, such as ethoxylated phosphate esters, have softening, anti-static, and surfactant properties.
The softening compounds differ in affinity to different materials. Some are better for cellulose-based fibers, others have higher affinity to hydrophobic materials like nylon, polyethylene terephthalate, polyacrylonitrile, etc. Silicone-based compounds such as polydimethylsiloxane comprise the new softeners which work by lubricating the fibers. Derivatives with amine- or amide-containing functional groups are used as well. These groups help the softeners bind better to fabrics.
As the softeners themselves are often of hydrophobic nature, they are commonly occurring in the form of an emulsion. In the early formulations, soaps were used as emulsifiers. The emulsions are usually opaque, milky fluids. However there are also microemulsions where the droplets of the hydrophobic phase are substantially smaller. The advantage of microemulsions is in the increased ability of the smaller particles to penetrate into the fibers. A mixture of cationic and non-ionic surfactants is often used as an emulsifier. Another approach is using a polymeric network, an emulsion polymer.
Other compounds are included to provide additional functions; acids or bases for maintaining the optimal pH for adsorption to the fabric, electrolytes, carriers (usually water, sometimes water-alcohol mixture), and others, e.g. silicone-based anti-foaming agents, emulsion stabilizers, fragrances, and colors. A relatively recent form on the market are the ultra-concentrates, where the amount of carriers and some other chemicals is substantially lower and much smaller volumes are used.
References
- "Bounce Everywhere". Bouncesheets.com. Retrieved 2009-06-04.
- "20 Household uses for used, yes, used dryer sheets". Four Green Steps. Retrieved 2011-05-06.
- "Henkel Consumer Info". Henkelconsumerinfo.com. Retrieved 2009-06-04.
- "Fabric softener and anti-static compositions – Patent 4118327". Freepatentsonline.com. 1977-03-28. Retrieved 2009-06-04.
- "Concentrated biodegradable quaternary ammonium fabric softener compositions containing quaternary ammonium compounds with short fatty acid alkyl chains – US Patent 5643865 Claims". Patentstorm.us. Retrieved 2009-06-04.
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