Wet wipe or thin hygienic material that can be sewered. RU patent 2519994.

FIELD: personal use articles.

SUBSTANCE: wet wipe or thin hygienic material that can be sewered contains nonwoven material that is bonded through fibres intertangling with jets of liquid, impregnated with a moistening composition. The nonwoven material contains wood pulp in an amount of at least 70% of the fibre mass, the rest represented by chemical fibres and/or natural fibres with length equal to at least 6 - 15 mm. The length of the wet wipe or thin hygienic material in the treatment direction exceeds the width in a direction crosswise relative to that of treatment by at least 25%; their moist condition strength in the treatment direction exceeds moist condition strength in a direction crosswise relative to that of treatment at least 3 times; the moist condition strength in a direction crosswise relative to that of treatment is equal to 50-200 N/m. The wet wipe or thin hygienic material contains a substance increasing moist state strength in an amount of no more than 0.1 wt % in terms of dry weight.

EFFECT: ensuring the possibility of the product disintegration when in the sewage combined with increased strength in the usage direction.

5 cl, 1 tbl, 7 ex

THE TECHNICAL FIELD TO WHICH THE INVENTION RELATES

The present invention relates to a wet cloth to wipe or thin hygienic material containing non-woven material, sealed entanglement fibers liquid jets, saturated wetting composition. The invention is especially true for wet toilet paper and other tissues to wipe or thin hygienic material, which can be down the drain after use.

THE TECHNICAL LEVEL OF THE INVENTION

Pre-moistened cloth to wipe or thin hygienic material usually used for cleaning various parts of the body. Examples of specific types of applications are: care of small children, wiping hands, the facilities for personal hygiene for women, toilet paper or additional funds to toilet paper.

As from the time of manufacture pre-moistened wipes to wipe often takes a long period of time prior to their use, they must have sufficient structural integrity to perform the function for which they are intended, i.e. to wipe during such period. By adding in a napkin to wipe the substances to improve its durability in a wet condition ensure its integrity in wet condition. However, especially when the cloth is used as toilet paper, there is a great need for a napkin to wipe or thinner material could pull the drain without the risk of problems associated with the blockage of pipelines and filters. Napkins to wipe or thinner material has high durability in a wet condition, don't break up or not torn into small complexes of fibers after lowering them in a common household toilet, which may lead to blockage of the drainage system.

Previously it was known, for example, U.S. patent number 3554788, the use of binders containing water-soluble component as adhesives in dispersible in water non-woven material. In the patent States that the material has good strength in dry condition, but easily disperses in water, and it can be lowered into the sewer. This non-woven material Packed in dry condition, and it saves sufficient structural integrity within any longer period of time as is required from the wet wipes for cleaning.

From the U.S. patent number 6110848 known wet cloth to wipe made of three-layer structure, sealed entanglement fibers liquid jets containing the outer layers of synthetic fibers and the middle layer of cellulose fiber.

Most of the goods from the pre-moistened toilet paper, suitable for the descent into the sewage system, now available on the market, suitable for the descent into the sewer because of their small size. They can navigate through drainage and Sewerage pipelines, but not easily break up and can, therefore, cause the problems associated with driving pipelines and filters.

In the document the US 2004/0112783 disclosed dry thin paper and carton for her store, where the thin paper is protected from breaks when removing it from the box because it has given tensile strength longitudinal and transverse directions. In a dry condition longitudinal tensile strength 2.5-3.5 times the tensile strength in the transverse direction.

Japanese document JP-A-2006181764 disclosed degradable in water napkin to wipe formed with the paper exposed hydration with a multilayer structure. Degradable in water napkin to wipe the saturated water-soluble detergent substance containing ions of alkaline metal. It has the ratio of strength when wet in the process direction and in the direction transverse to the direction of processing, from 1.0 to 3.5 and durability in a wet condition in the direction transverse to the direction of treatment, less than 0.5 N/25 mm

SUMMARY OF THE INVENTION

The aim of the present invention is to provide a damp / wet cloth to wipe or thin hygienic material, which could be down the drain after use. This goal according to the invention achieved through what damp cloth to wipe or thin hygienic material is made from non-woven material, fastened by crowding fibers liquid jets, saturated wetting composition where the above-mentioned non-woven material contains at least 70%, by weight of the fiber, wood fiber supply, and the rest of consisting of chemical fiber and/or natural fibre length constituting at least 6 mm; where the mentioned wet cloth to wipe or thin hygienic material have length in the direction of processing and width in the direction transverse to the direction of processing, where the length exceeds the width of at least 25%, and where mentioned wet cloth to wipe or thin hygienic material to wipe possess durability in a wet condition in the direction of processing, which at least 3 times more durability in a wet condition in the direction transverse to the direction processing, and where durability in a wet condition in the direction transverse to the direction of processing, is from 50 N/m to 200 N/m

Durability in a wet condition in the direction of treatment can be at least 4 times, and preferably at least in 5 times more, than in a direction transverse to the direction of processing.

Durability in a wet condition in the direction of treatment can be up to 10 times more, than in a direction transverse to the direction of processing.

The mentioned chemical fiber or natural fibers can be up to 15 mm

Wet cloth to wipe or thin hygienic material may not contain more than 0.1 wt.%, calculated on the dry weight of a substance to improve strength when wet.

Wet cloth to wipe or thin hygienic material can have a length in the direction of processing, which exceeds the width in the direction transverse to the direction of processing at least 50%.

Wet cloth to wipe or thin hygienic material for wiping can be wet toilet paper.

Wet cloth to wipe or thin hygienic material can have a density of 40 g/m 2 up to 100 g/m 2 .

Wet cloth to wipe or thin hygienic material for wiping may have strength when wet in the direction transverse to the direction of processing from 60 N/m to 160 N/m

Wet cloth to wipe or thin hygienic material can contain at least 5%, by weight of the fiber, chemical fiber and/or natural fibre length constituting at least 6 mm

DESCRIPTION OF OPTIONS FOR THE IMPLEMENTATION OF

Pre-moistened cloth to wipe or thin hygienic material according to the invention contain non-woven material, fastened by crowding fibers liquid jets, saturated wetting composition. Wetting composition can have a major proportion water and other ingredients depending on the destination. Wetting formulations suitable for moistening napkins to wipe or thin hygienic material, well-known in the field of production.

Bond confusion between fibers liquid jets, or "Spunlace", is a technology of formation of non-woven cloth, created in the 1970-ies (see, for example, a patent Canada no 841938). The method includes receiving fiber fabric, generated either in the " dry " method, or by wet method, after which the fiber mix up through the influence of a very thin jets of water under high pressure. Several series of jets of water directed at fibrous cloth that support for roaming perforated support tool or perforated drum. In this process, the fiber mix up with each other, providing an adequate bonding strength fiber fabric without the use of chemicals and adhesives. Fiber cloth with mixed up in it fibers are then dried. The fibres used in the material, can be natural fibres, especially pulp of wood fibers, chemical staple fibers and blends wood fibers and staple fibers. It is possible to produce high quality material Spunlace that has a high absorptive capacity, at an acceptable cost.

Short wood fibre, however, has a relatively low ability to weave and entanglement with each other in the process of fastening confusion between fibers liquid jets, and, thus, usually it is mixed with longer hair for weaving, sealed with the entanglement of fibers liquid jets, with considerable strength. These longer fibers, with an average length constituting at least 6 mm, can be fibres and/or natural fibers, as mentioned above. Mentioned longer fibers preferably have long constituting not more than 15

mm Fineness longer fibres can range from 0.3 decitex to 6 decitex.

Fibers are mixed to form a fibrous cloth. Fibrous cloth form or by dry method, or by wet method. When forming the fibrous cloth wet method fiber is dispersed in a liquid, usually water, in a manner similar to the process of making paper, and diluted dispersion fiber putting on perforated bearing element, where it is dewatered for the formation of

continuous protobranchia material. Dispersion fiber can be diluted before any concentration that is usually used in the ordinary process of making paper. Option of wet formation of paper web is the process of using foam, obtained by adding surfactants in dispersion fiber, which froth and foam dispersion fiber putting on perforated support tool. Through the application of the process of foaming with the web is a very even distribution of fiber, as well as the working longer fibres than conventional wet way of formation.

Formed fiber cloth is then subjected to bond confusion between fibers liquid jets supplied from several rows of nozzles, from which a jet of water under high pressure is directed to fiber cloth, the cloth is supported on a perforated host element. Fibrous cloth dehydrate, holding it above the suction ducts. Thus, the water jets provide entanglement fibers in fiber cloth, i.e. the interlocking grain. In nozzles for reversal fibers create appropriate fluid pressure, taking into account the composition of the fibrous material, density fiber fabric, etc. Water supplied through a nozzle to clutter fibers are removed from the fiber fabric, passing it over suction ducts, and pump it to the plant for water purification, and then sent back to the station for reversal of fibers.

For additional descriptions of the method of securing the entanglement of fibers liquid jets or, as it is also called the technology "Spunlace", links, for example, patent Canada no 841938.

Entanglement fibers liquid jets can be done in one or several stages, and on one side of the canvas or both sides of the canvas. The canvas can be transferred to another perforated support tool between two successive stages of the bond of confusion between fibers liquid jets.

Material containing mixed fiber, dehydrated and carry on clothes station for drying to the ready state of the material that is wound into rolls and Packed. Drying can be done by blowing hot air through fiber cloth, through the use of IR dryers or other non-condensing drying technology.

The canvas containing mixed fibres, cut into napkins to wipe or on pieces of thin hygienic material of suitable size, where napkins to wipe or segments thin hygienic material have length in the direction of processing of paintings and width in the direction transverse to the direction of processing of the canvas where the length exceeds the width of at least 25%. Form napkins to wipe or cut thin hygienic material can be rectangular or any other optional form within, while the ratio of length to width corresponds to the above value. If the length and/or width varies along napkins to wipe or thin hygienic material, the maximum length in the direction of treatment and the maximum width in the direction transverse to the direction of processing, are the dimensions specified as the nominal.

Usable dimensions of napkins to wipe or thin hygienic materials that can be down the drain after use, are: length - 9 cm to 25 cm; width - from 7 cm to 15 cm

The strength of napkins to wipe or thin hygienic material in wet conditions must be at least 3 times, preferably at least 4 times, and preferably at least 5 times more in the direction of the process than in the direction transverse to the direction of processing. Durability in a wet condition can be up to 10 times more in the direction of the process than in the direction transverse to the direction of processing.

Durability in a wet condition in the direction transverse to the direction of treatment, should be between 50 N/m to 200 N/m

Durability in a wet condition determined by using water, in accordance with the test method SS-EN ISO12625-5:2005.

The density of napkins to wipe or thin hygienic material without wetting composition is preferably from 40 g/m 2 up to 100 g/m 2 , calculated on the dry weight of fibrous material.

The above indicators of durability in a wet condition make the cloth to wipe or thin hygienic material is strong in the direction in which it is usually used when wiping, i.e. in the direction of the length in manufacturing. This reduces the risk of rupture and surovaya during use. Napkins with relatively fragile in the width direction, which they usually are under the least load while wiping, which makes it possible tearing napkins to wipe thyself in the sewers after use.

Relatively low strength in the direction transverse to the direction of processing can be achieved through regulation of process parameters of the bond of confusion between fibers liquid jets, for example, regulation of pressure in nozzles to create streams for reversal of fibers and/or regulate the speed of transportation arrangement during the implementation process. Thus, by reducing the pressure in nozzles to create streams for reversal of fibers and/or by increasing the speed transportation arrangement during the process of strength properties of a cloth-bound entanglement fibers liquid jets, usually lower, especially strength in the direction transverse to the direction of processing. Strength in the direction of processing is always more due to the orientation of the fibres and the bonding process confusion between fibers liquid jets is not affected to the same extent that it affects the strength in the direction transverse to the direction of processing. It is also known that the orientation of the fibres in the direction of processing can be affected during the formation of fibrous paintings by regulating the flow velocity dispersion fiber jet from headbox, relative to the speed wire forming conveyor.

The cloth to wipe or thin hygienic material to wipe you can crepe, to press or other means texture to enhance the softness of the product. Usually when drawing canvas due to increasing softness is a tendency to decrease the strength of the cloth wet.

The cloth to wipe or thin hygienic material for wipes impregnated with wetting composition containing ingredients, depending on the purpose of the product. The main part of the wetting composition is usually water. Other ingredients may contain detergents, substances for skin care, bactericides, fungicides, softeners, odorants, protecting substances, etc. depending on the destination of the product.

One type of use napkins to wipe or thin hygienic material according to the invention is their use as a wet toilet paper. As an example suitable wetting wet toilet paper can be water-soluble compound, which may contain such ingredients: propylene glycol, Phenoxyethanol, complicated, polyaminopropyl, degidroholevaya acid, flavors, kokamidopropilbetain, oil ordinary chamomile, bisabolol, citric acid, amillennial, citronellol, existingedge, butyldimethylsilyl etc.

Cloth to wipe or thin hygienic material may not contain or may contain very small amounts of the substance to increase the strength when wet. Under the "small number" here understand the amount of up to 0,1 mass% materials for improvement of durability in a wet condition calculated on the dry weight of napkins to wipe or thin hygienic material. The use of large quantities of substances for increase of durability in a wet condition impairs the ability of the descent into drains napkins to wipe and makes more difficult their rupture or disintegration in the sewers.

Damp cloth to wipe or thin hygienic material, package or separately in hermetically sealed packages, which you can open by breaking or lay in supplies the device that contains a large number of napkins to wipe or products made of thin material that you can spend, pulling out through the hole in the feed device.

The invention is explained below in the examples with links to some of the options for the implementation and results of their testing.

Materials for tests were made by the following methods.

Dispersion fiber was prepared from the mixture of water and wood fiber supply and chemical fiber staple length. Fibrous cloth fastened confusion between fibers liquid jets on one or both sides. Total energy consumption in the bond confusion between fibers liquid jets ranged from 160 kWh up to 200 kWh per ton of material.

Then fibrous cloth was obezvozhivani by using vacuum suction boxes and dried, using the technology of drying by procosa air.

Fiber is used for the formation of fiber fabric, had the following composition:

Example 1 :

fiber Lyocell company Lenzing Fibers - 24,3%of mass; linear density is 1.7 decitex; length - 15 mm;

- cellulose fiber (bleached sulphate pulp GSM-soft plus, International Paper) - 75.7%;

- cloth fastened confusion between fibers liquid jets on the one hand;

- energy costs in the bond confusion between fibers liquid jets - 163 kWh/t;

- transportation rate canvas - 158 m/min

Example 2 :

fiber Lyocell, as in Example 1, 24.3%;

- cellulose fiber, as in Example 1, 75,7%of mass;

- cloth fastened confusion between fibers liquid jets on the one hand;

- energy costs in the bond confusion between fibers liquid jets - 179 kWh/t;

- transportation rate canvas - 156 m/min

Example 3 :

fiber Lyocell, as in Example 1, 24.3%;

- cellulose fiber, as in Example 1, 75.7%mass,;

- cloth fastened confusion between fibers liquid jets from both sides;

- energy costs in the bond confusion between fibers liquid jets - 179 kWh/t;

- transportation rate canvas - 158 m/min

Example 4 :

fiber Lyocell, as in Example 1, 30 wt.%;

- cellulose fiber, as in Example 1, 70%of mass;

- cloth fastened confusion between fibers liquid jets from both sides;

- energy costs in the bond confusion between fibers liquid jets - 200 kWh/t;

- transportation rate canvas - 158 m/min

Example 5 :

fiber Lyocell, as in Example 1, 30 wt.%;

- cellulose fiber, as in Example 1, 70%of mass;

- cloth fastened confusion between fibers liquid jets on the one hand;

- energy costs in the bond confusion between fibers liquid jets - 170 kWh/t;

- transportation rate canvas - 158 m/min

Example 6 :

fiber Lyocell, as in Example 1, 20 wt.%;

- polypropylene fibre brand Create WL company Fibervisions - 5

wt.%; linear density is 1.7 decitex; length - 6 mm;

- cellulose fiber, as in Example 1, 75%of mass;

- cloth fastened confusion between fibers liquid jets on the one hand;

- energy costs in the bond confusion between fibers liquid jets - 197 kWh/t;

- transportation rate canvas - 149 m/min

Example 7 :

fiber Lyocell, as in Example 1, 25 wt.%;

- cellulose fiber, as in Example 1, 75%of mass;

- cloth fastened confusion between fibers liquid jets on the one hand;

- energy costs in the bond confusion between fibers liquid jets - 151 kWh/t;

- transportation rate canvas - 171 m/min

Calculations about the strength properties of the canvas, both dry and wet, gave the results presented in Table 1, below:

Density (g/m2 )

Strength in dry condition in the direction of processing, (N/m)

Strength in dry state in the direction transverse to the direction of processing (N/m)

Durability in a wet condition in the direction of processing (N/m)

Durability in a wet condition in the direction transverse to the direction of processing, (N/m)

The ratio of the strengths in the process direction and in the direction transverse to the direction of processing, in the wet state

Used the following methods tests:

Density determined by the standard SS-EN-ISO 12625-6:2005.

Strength in dry condition was determined by standard SS-EN-ISO 12625-4:2005.

Durability in a wet condition was determined by standard SS-EN ISO 12625-5:2005 (defined in the water).

1. Wet cloth to wipe or thin hygienic material, which can be down the drain with a density of 40 g/m 2 up to 100 g/m 2 and containing non-woven material, sealed entanglement fibers liquid jets, saturated wetting composition where the above-mentioned non-woven material contains at least 70% by weight of the fiber wood fiber supply and at least 5% of chemical fibers and/or natural fibres with a length of at least 6 mm and 15 mm, where the mentioned wet cloth to wipe or thin hygienic material has a length in the direction of processing and width in the direction transverse to the direction of processing, wherein mentioned wet cloth to wipe or thin hygienic material possess durability in a wet condition in the direction of processing, which at least 5 times and 10 times more than durability in a wet condition in the direction transverse to the direction processing, where durability in a wet condition in the direction transverse to the direction of processing, is from 50 N/m to 200 N/m, and where the length of a damp / wet cloth to wipe or thin hygienic material exceeds the width of at least 25%, and where mentioned wet cloth to wipe contains not more than 0.1 wt.%, calculated on the dry weight of a substance to improve strength when wet.

3. Wet cloth to wipe or thin hygienic material according to claim 1 or 2, wherein they are wet toilet paper.

4. Wet cloth to wipe or thin hygienic material according to claim 1 or 2, wherein they have durability in a wet condition in the direction transverse to the direction of processing from 60 N/m to 160 N/m

5. Wet cloth to wipe or thin hygienic material according to claim 3, wherein they have durability in a wet condition in the direction transverse to the direction of processing from 60 N/m to 160 N/m