EP3004453A1

EP3004453A1 - Cleaning cloth

Info

Publication number: EP3004453A1
Application number: EP14726877.5A
Authority: EP
Inventors: Volker RITTHALER; Jörg Dunkel; Jörg Hausdorf; Gerrius VROOM; Andreas Eisenhut
Original assignee: Carl Freudenberg KG
Current assignee: Carl Freudenberg KG
Priority date: 2013-05-28
Filing date: 2014-04-11
Publication date: 2016-04-13
Anticipated expiration: 2034-04-11
Also published as: RU2015155558A; CN105229222B; WO2014191071A1; ES2717670T3; RU2635158C2; CN105229222A; KR20160012218A; DE102013008985A1; KR101813152B1; EP3004453B1

Abstract

The invention relates to a cleaning cloth made of a textile support material which is provided at least partially with a PVF-microfoam in an amount such that the proportion of microfoam with relation to the total weight of the cleaning cloth is less than 60 wt %, preferably less than 40 wt %. The textile support material has no PVA or has less than 50 wt. % PVA.

Description

cleaning cloth

The invention relates to a cleaning cloth having a textile carrier material and a coating or impregnation thereon. The

Cleaning cloth combines in a novel way good cleaning properties and sliding properties with a cost-effective production and good

Washing stability.

In the household and in the professional cleaning various types of cleaning cloths are known, which serve for the cleaning of the floor or other surfaces. The cleaning cloths may have a simple structure, for example by being formed from a monolayer textile base body. It is important for the cleaning cloth that it absorbs the dirt from the surface to be cleaned well and returns as completely as possible during the wringing process. In addition, the water absorption and -abgäbe the cloth is important. On the one hand, water is used to dissolve adhering water

Dirt is needed, on the other hand so that the loosened dirt or loose dirt particles such as dust etc. are tied and removed with the cloth from the surface to be cleaned. Furthermore, the sliding properties of the cloth are important to the user. It has been found that when cleaning large areas (e.g., windows, blackboards, large tables, walls,

Car bodies), the cleaning cloth should slide rather easily to achieve a good ergonomics and low effort when wiping. For smaller or more polluted areas, on the other hand, users prefer often wipes with a higher friction, so that adhering dirt can be better removed, or the cleaning process is also haptically detectable. To increase the cleaning performance, it is known to provide textile carrier materials with a coating or impregnation. For example, textile materials can be provided with a polyurethane (PU) coating or impregnation. The application of the PU coating or impregnation mass is carried out according to common practice of the type that the substrate is immersed in a solution of PL) and dimethylformamide (DMF).

Another known method is the coating or impregnation of a textile carrier material consisting of PVA (polyvinyl alcohol) fibers with a PVF microfoam. This results in good adhesion between the fibers and the coating / impregnation material since, during the coating / impregnation process, the surface of the fibers is solubilized in the aqueous medium and a permanent and washable chemical-physical surface bond between support and surface

Coating material is achieved.

The object of the invention is based, a

To provide cleaning cloth of the type mentioned, which combines good cleaning properties with good water absorption and sliding properties while having a good wash stability. With the

Cleaning cloth should also be achieved a very good cleaning effect.

Next is the cleaning cloth the dirt, especially loose dirt particles, when flushing again can easily and easily. This can be prevented, for example, that recorded sand (eg with quartz components) when cleaning chrome-plated / polished surfaces these are scratched or damaged. In addition, the cleaning cloth should allow a gentle cleaning of objects or surfaces.

Finally, the coating, or impregnation should show sufficient adhesion to the textile substrate to a corresponding

to have mechanical stability during cleaning and especially during machine washing. Under high stability in machine washing should be understood according to the invention that in an Eltra washing process, defined in the Federal Health Gazette - Health Research - Health Protection 10, 2007, page 1345 when using 7 g of Eitra as detergents and disinfectants, a disinfection temperature of 60 ° C, a contact time of 20 min, a liquor ratio of 1: 5 and a

Range of action AB a weight loss of the cleaning cloth of less than 5 wt.% Is present. This object is achieved by a cleaning cloth comprising a textile carrier material which is at least partially provided with a PVF microfoam in such an amount that the proportion of PVF microfoam on the total weight of the cleaning cloth less than 60 wt.%, Preferably less than 50 % By weight and which does not have PVA fibers or PVA fibers in an amount of less than 50% by weight.

The cleaning cloth according to the invention is characterized in that it has a non-PVA fibers textile substrate, which is provided with a PVF microfoam. In this case, the PVF microfoam may be present as a coating and / or impregnation and have pore sizes below 00 pm. Preferably, the microfoam is both as

Coating as well as impregnation before, that is, that both the fiber interstices filled with PVF microfoam present as well as a top layer of PVF microfoam is present. Surprisingly, the cleaning cloth according to the invention has an excellent washing resistance. This is surprising insofar as it has always been assumed that it is necessary for a high resistance that a PVA fiber has to be coated or impregnated with a PVA solution. By the chemical similarity of the two

In fact, as a result of the partial dissolution of the PVA fiber, a good chemical and mechanical bond between the fiber and the microfoam results. That's why it stands out

Cleaning cloth according to the invention by a good mechanical stability during cleaning and in particular in the machine wash.

However, practical experiments have now shown according to the invention that a non-PVA-like carrier such as PP / PES / PA with PVF can enter into a good and especially wash stable compound, if the foam is present as microfoam. Thus, in the cleaning cloth according to the invention, the proportion of PVA, in particular of PVA fibers, may be less than 50% by weight or even less than 30% by weight, or even less than 10% by weight and in particular less than 5% by weight. The cleaning cloth can not be PVA,

in particular, have no PVA fibers.

Without being bound to a particular mechanism according to the invention it is believed that the formation of tension sails within the

Micro foam structure has a significant share for the good connection of the non-PVA-like carrier with the PVF coating.

According to the invention, the textile carrier material is at least partially provided with a PVF microfoam in such an amount that the proportion of PVF microfoam in the total weight of the cleaning cloth is less than 50% by weight, preferably less than 30%. The adjustment of such a rather low proportion of PVF microfoam is advantageous because it has been shown that As a result, the textile and soft feel of the final cleaning cloth can be largely preserved, although the PVF microfoam has the property of losing softness in the dry state and thus to a

largely bending cleansing wipe leads.

Practical tests have shown that it is expedient for the adhesion of the PVF microfoam to the textile carrier material, for example the nonwoven fabric, when the carrier material is open-pored. This is advantageous since the PVA solution used for the production of the PVF microfoam penetrates the carrier material well and, for example, the

Fleece fibers, or filaments can enclose on all sides.

If a rather dense substrate used, so can a good

Penetration of the substrate by the PVF microfoam can also be achieved by using a PVA solution that has a rather low viscosity. The PVF (Pol vinylformal) microsphere, as known to those skilled in the art, can be formed by reacting PVA with formaldehyde. This reduces the water solubility of the PVA. According to the invention, the PVF microfoam preferably has a solubility in water at 100 ° C. of less than 5% by weight.

Practical experiments have shown that the inventive

Cleaning cloth good in addition to its high wash stability

Cleaning properties combined with good water absorption and sliding properties. At the same time a good flushability of the collected dirt is achieved from the cloth.

It is conceivable that the textile carrier material consists at least proportionally of a microfiber material. This embodiment may be for some

Applications should be appropriate, as well as in the use of fibers a hydrophobic material because of the capillary action of the knitted

Microfibre yarns may have a high water absorption capacity (e.g., in% relative to the dry weight of the fabric). According to one embodiment of the invention, the cleaning cloth has hydrophobic materials in combination with hydrophilic materials (PVF microfoam) and is thus overall amphiphilic. Such a thing

Cleaning cloth has a high cleaning effect for both oleophilic and hydrophilic dirt, which makes it suitable for a variety of applications.

An advantage of the use of PVF is further that it is particularly absorbent due to the free OH groups per se. The hydrophilicity of the PVF material is further enhanced by being used in the form of a microfoam. This material has due to the Feinporig igkeit the

Microfoam structure on an even higher hydrophilicity. In addition, the PVF microfoam may be the fibers and optionally yarns of the textile

Envelope largely or even completely enveloping whereby a stable mechanical connection between the substrate and

Coating / impregnation can be achieved. This is particularly advantageous if hydrophobic materials are used as carrier material, since the PVF microfoam actually does not have good adhesion to such materials. According to a preferred embodiment of the invention is a

Nonwoven backing material combined with a PVF microfoam. It is advantageous that nonwovens are simple and inexpensive to produce and the cleaning cloth yet by an excellent

Cleaning performance and wash stability distinguished. When using a carrier material in the form of a knitted fabric or

Knitted, a high washing stability is further facilitated by the fact that the knitted or knitted base material already in itself a high

Has washing stability, due to the spatial concatenation of the yarns.

Practical tests have shown that the coating and / or

Impregnation of PVF advantageously has a basis weight of 10 to 150 g / m ² , preferably from 50 to 100 g / m ² . In this case, the textile substrate advantageously has a basis weight of 80 to 200 g / m ² , preferably from 90 to 80 g / m ² , in particular from 100 to 140 g / m ² , on.

As the base material for the textile carrier material fibers of a hydrophobic material can be used according to the invention. The term "hydrophobic" is understood according to the invention in the conventional sense.

In particular, for the purposes of the invention, materials are considered to be hydrophobic, in which water has a contact angle of greater than or equal to 90 ° on the surface of a compact body formed from them. The contact angle may be known e.g. be determined with a contact angle measuring device from Krüss. However, fibers made of a hydrophilic material have also proven to be suitable.

Fibers made of the following materials have proven to be particularly suitable: polyamide or polyester, viscose, hydrophobized viscose, hydrophilized viscose, modified polyester, polyacrylonitrile, triacetate, acetate, polyolefins such as polyethylene and polypropylene, polyvinyl chloride and / or mixtures thereof. Particularly preferred according to the invention is the use of polyamide, in particular polyamide 6 or 66, polyethylene and / or polyester,

in particular PET and / or mixtures thereof. Fibers made of polyester, viscose, polyethylene and in particular mixtures thereof have proved to be particularly suitable according to the invention.

Preference is given to staple fibers and / or continuous filaments. According to a preferred embodiment, such a textile carrier material contains polyester, in particular PET and / or modified polyester. This can be used either as an exclusive raw material or blended with other fibers (e.g., viscose). The used fiber titer can range between 0.05 and 3 dtex. For some applications, it is useful when in the

Range of a microfiber, that is between 0.1 and 1 dtex. The advantage of using the microfibers is that they show good cleaning results, are very soft and thus provide a pleasant feel.

For example, microfibers with a titre of 0.05 to 1.0 dtex, in particular 0.1 to 0.7 dtex, can be used.

In the distribution of the proportions of the textile carrier material and the

Coating / impregnation with PVF has been shown to be through

appropriate choice of the proportions of textile carrier material and PVF

Microfoam cleaning wipes can be obtained in which the textile and soft feel of the substrate is maintained although the PVF microfoam basically loses its softness in the dry state and. thus leading to a largely flexible cleaning cloth.

Preferably, the cleaning cloth has a total basis weight of from 90 to 350 g / m ² , more preferably from 200 to 300 g / m ² . It can do that

Cleaning cloth fibers preferably in an amount of 60 to 200 g / m ² , more preferably from 100 to 120 g / m ² included. The fibers used for the production of the textile fabric can be inexpensively in a wide variety of Finishes and colors are provided and the PVA coating, or impregnation can be applied in a simple manner by conventional methods. According to the invention, the fabric is preferably provided with a full-surface coating or impregnation. An advantage of this

Embodiment is that the full-surface coating, or impregnation solidifies the sheet and thus increases its stability. In addition, due to the high proportion of hydrophilic PVF on the one hand the

Remove a larger amount of liquid from one to clean

Surface can be accomplished particularly well. On the other hand, this makes it possible that only a thin, uniform liquid film remains on the surface to be cleaned during the wiping process. This allows streak-free cleaning especially on glossy surfaces.

In principle, both consolidated and unconsolidated textile base materials can be used as the textile fabric. To one

However, to obtain mechanically stable cleaning cloth, it is advantageous if the textile substrate is at least partially mechanically, thermally and / or chemically solidified. Particularly in the case of nonwovens, the consolidation of the randomly arranged or partially aligned fibers can be effected mechanically by needling and / or thermally and / or chemically.

For the production of the fabric fibers and / or yarns

be used. The fabric is preferably in the form of a nonwoven fabric, a knitted fabric, a knitted fabric, a fabric, fabric,

Braid, a knitted fabric, a felt, fleece, a tufted fabric, a fabric, combinations of the like and other planar structures. Particularly preferred according to the invention is the use of nonwovens.

Nonwovens offer the advantage that they can be produced easily and inexpensively. Likewise, the basis weight of the cleaning cloth can vary depending on the desired application. As suitable for most purposes have basis weights of 90 to 350 g / m ² , preferably 180 to 230 g / m ² proved. Depending on the application, the textile substrate can be easy to clean and / or flameproof. Thus, the fibers may be composed of polymers containing additives, such as color pigments, permanently acting

Antistatic agents, fungicides, bactericides, acaricides and / or the hydrophilic or hydrophobic properties affecting additives in amounts up to 10 wt.% Contained.

The textile substrate may further comprise fibers (staple fibers or

Endlosfilamente), which fibers in the manufacture of e.g. be dyed by spin dyeing. As well have been suitable

subsequent dyeing processes on the loose fibers (bale staining) or on the finished carrier material (piece staining) proved.

Due to the advantageous properties of the textile fabric, its use as a cleaning textile is recommended. So it can be made of it, for example, wiping or cleaning cloths.

According to one embodiment of the invention, for example, on the coated or impregnated with the PVF microfoam side of the textile

Sheet a print pattern of abrasives, for example

polishing particles, applied. The polishing particles could be formed for example by silica. These particles result in a cleaning cloth with a slightly abrasive effect. The abrasive can be applied in a simple printing process in a variety of variants on the textile substrate. Thus, an additional

Cleaning effect and a decorative effect for the textile structure can be achieved.

For some applications, it may be appropriate if the

Cleaning cloth roughened, sanded, brushed or calendered.

It is also conceivable to pretreat the textile substrate. In this case, e.g. a printing, calendering or partial embossing in question. When using a colorless PVF microfoam in particular the printing can remain visible even after the coating or impregnation still durable and wash stable.

For professional cleaning, it is advantageous to design the cleaning cloth in different colors so as to mark the use of a cloth in only one cleaning area (e.g., sanitary area). In the present invention, the dyeing of the cloth can be done, for example, in the following ways:

The textile substrate is already used partially or fully colored. In combination with a colorless PVF order remains the

Base color of the substrate still visible.

Alternatively, the PVA solution used to make the PVF microfoam may also be mixed with a colored pigment. In this case, a colorless, and thus cheaper carrier material can be selected and the color of the cleaning cloth can be omitted entirely or only in the later step of the PVF coating, or

Impregnation can be selected and adjusted. This has particular logistic advantages. Again, the dye can be chosen so that it can be permanently wash stable and in particular without bleeding introduced into the PVF material.

A further subject of the present invention comprises a process for producing the cleaning cloth according to the invention, comprising the following steps:

First, a fabric having no PVA or PVA in an amount of less than 50% by weight is prepared or provided as a base fabric. This is then mixed with a PVA-containing aqueous solution by conventional application methods, for example the padding method, a doctor blade method, a

Spray application, a Pflatschwerk, with a slot or a nozzle

Slot die provided on the textile base material. It has proven particularly suitable to impregnate the textile base material with an aqueous PVA solution. Excess PVA can be squeezed, doctored off, sucked off or otherwise removed depending on the desired coating thickness or impregnation thickness. The base material thus treated can be introduced into an aqueous salt solution and / or suspension, for example a sodium sulphate solution, and subsequently into an acidic formaldehyde solution. In the aqueous salt solution, the PVA solution is deprived of water and the PVA is coagulated. In the acidic formaldehyde solution, the PVA is cross-linked to PVF. According to an advantageous embodiment, the aqueous PVA solution and / or suspension contains further addition substances, such as color pigments or other additives or particles, such as the abovementioned abrasive. The PVA solution preferably contains a solids content of PVA between 1 and 10% by weight, preferably between 3 and 7% by weight.

With the method according to the invention, a textile structure can be produced in a simple and highly productive manner, which has a PVF-containing coating or impregnation. The PVF-containing coating or impregnation can penetrate into the textile base material, whereby it is firmly anchored in the textile base material.

Claims

claims

Cleaning cloth comprising a textile carrier material, which

at least partially with a PVF microfoam in such a

Amount provided is that the proportion of PVF microfoam on

Total weight of the cleaning cloth less than 60 wt.%, Preferably less than 40 wt.% Is, characterized in that the textile carrier material has no PVA or PVA in an amount of less than 50 wt.%.

Cleaning cloth according to claim 1, characterized in that the textile carrier material of polyamide or polyester, viscose,

modified polyester, polyester blend fabrics, polyamide blend fabrics, polyacrylonitrile, triacetate, acetate, polycarbonate, polyolefins such as

for example, polyethylene and polypropylene, polyvinyl chloride,

Glasfasen, mixtures thereof, or a mixture of at least one of these materials is formed with at least one other material.

Cleaning cloth according to one or more of the preceding

Claims, characterized in that the textile carrier material is a nonwoven fabric.

Cleaning cloth according to one or more of the preceding

Claims, characterized in that the coating and / or impregnation of PVF microfoam has a basis weight of 50 to 100 g / m ² , and the textile support material has a basis weight of 90 to 180 g / m ² . Process for producing a cleaning cloth according to one or more of the preceding claims, characterized in that a PVA-containing aqueous solution is prepared or made available, and a fabric which does not contain PVA or PVA in an amount of less than 50% by weight. has, is provided with the solution.