Shoe covers - covers or protective stockings worn on top of shoes . They are used mainly for hygienic purposes, to maintain the cleanliness of the premises from street dirt. They are used in medical institutions, in premises of especially clean industries, in museums, etc. There are various designs, materials and colors. More often disposable, but there are also reusable ones (for example, reusable shoe covers made of thick soft fabric are used in museums to preserve valuable parquet floors). Also, reusable fabric shoe covers are used by medical personnel in operating rooms, put on clean shoes, and are disinfected by autoclaving after use.
Content
Nonwoven shoe covers
High non-woven shoe covers (fifty-four centimeters high) are available for surgeons . They are made with different types of soles: tractor, laminated.
Low non-woven shoe covers are suitable for visitors to bowling clubs, as they are worn on socks, not shoes, and for nurses who put on shoe covers for replaceable and not outdoor shoes. Non-woven shoe covers come in different densities, from 25 to 35 g / m².
Elastic visor shoe covers
The most common low disposable shoe covers for visitors. They are made from various types of polyethylene with an elastic band. In the case of machine manufacturing, a third component is added: spunbond slices. Shoe covers vary in the thickness of the used plastic film, the quality and type of material, as well as the manufacturing method.
For visitor shoe covers, a film of 8 to 20 microns is used. Although on boxes with shoe covers manufactured by the People's Republic of China (in 2009 they occupied 95% of the market) they often write not real, but doubled, while overstating. To understand the actual density of the film, it is easier to estimate the weight of the shoe cover. The standard shoe cover marked “20 microns” actually has a size of 41x15 cm, a film thickness of 10 microns and a weight of 2.0 grams / piece.
The material from which shoe covers are made is usually HDPE or LDPE. Manufacturers from China often use material little known in the Russian Federation - chloropolyethylene (CPE), in this case the film is obtained with small pimples, and shoe covers are textured. Also, the quality of the film is affected by the primary or secondary (recycled) material was used in its production.
By the method of manufacturing shoe covers are with "manual" or "machine" rubber. With the manual method of production, one-piece elastic bands are used, which are manually stretched onto the film, the edges of the film are bent and welded. In the machine method, an elastic band of two coils is fed to 2 edges of the film, the film is also bent, welded, folded in half and spanbond is welded to them at the junction of the elastic bands.
Reliability of shoe covers depends on the quality of the film and the quality of adhesion of the elastic gum. Depending on the class, shoe covers are able to withstand from 5 minutes to 5 hours.
Shoe machines
Rubber shoe covers can be delivered packed in rounded capsules with a diameter of 28 mm for sale to visitors through vending machines. One pair of shoe covers is placed in one capsule. In addition, there are machines such as Boot-pack for putting on and removing shoe covers.
Automatic machines for putting on shoe covers are a device, when placing a foot in the inside of which shoe covers are put on on an elastic band.
A shoe boot is a device that delivers a plastic film and fixes it on shoes by supplying hot air.
Protective shoe covers
Shoe covers are often called protective stockings worn over shoes, usually made of durable rubber or rubberized fabric, which are included in the set of suits for chemical and radiation protection .
Shoe covers in the Far North
- Wearing high shoe covers made of thick tarpaulin over warm winter shoes prevents the ingress of snow inside (when moving on a virgin snow). The foot remains dry.
- Human skin releases a certain amount of water vapor. When a person is in the cold, water vapor diffuses through the shoe wall, followed by condensation (see: dew point ). Condensation occurs, as a rule, in the thickness of the material from which the shoes are made. Wearing shoe covers made of tarpaulin that are not tightly attached to winter shoes ( boots , high fur boots , boots ), hunters shift the condensation point closer to the outer surface of the material (or even beyond the material). Shoes do not freeze and remain dry, just remove the shoe covers and shake out the frost .
See also
- Galoshes
- Gaiters
- Leggings
- Uwabaki
- sv: pampusch