JPH11508256A - Clean article, support therefor, and method of manufacturing support - Google Patents

Abstract

A non-woven, fibrous substrate is described for use in a cleaning article such as a wet wipe. The substrate has a toughness of less than 0.6 Nm, and comprises a proportion of long fibres, typically at least 2 or 3cm in length, which are capable of protruding from the surface of the substrate as a result of rubbing which takes place when the substrate is used for cleaning, whilst remaining attached to the substrate. The substrate is preferably made by hydroentangling using low power jets of water. <IMAGE>

Description

DETAILED DESCRIPTION OF THE INVENTION             Clean article, support therefor, and method of manufacturing support   The present invention relates to a clean article, a support therefor and a process for producing such a support. I do. The present invention relates to so-called wet wipes, i.e. clean or other related Used to produce small sheets, wetted by a liquid having the property of It is particularly suitable for a support to be used. Such wipers are for example baby wipes It is sold in the form of body, adult incontinence wipes, facial and skin cleansing wipes. But Meanwhile, the present invention relates to, for example, moistened toilet paper, dry wipes, etc. And other forms of products used to clean parts of humans, Other surfaces such as, for example, kitchen and tub surfaces and, for example, machine or motor vehicle surfaces. The present invention is also applied to a wiping body for cleaning a surface. As is clear from the following description, Some of the advantages of the invention and its embodiments are such lifeless surface cleaning. is connected with.   For simplicity, the following description is limited to wet wipes for cleaning human skin. As described above, the present invention is considered in consideration of the wide application range of the present invention as described above. You should understand.   Wet wipes consist of a support made of a nonwoven fibrous material wetted with a suitable liquid . The nonwoven support material is formed to have high strength. Holds a large amount of wetting liquid If a sufficiently low density is desired to allow for the presence of Certain restrictions are imposed on the size. However, this is a limit Not something. Because all or much of the liquid is open pore hair between the fibers Because it is not retained by the tube phenomenon but by the strong hydrophilic surface of the fiber . This is the case, for example, with cellulose / pulp air-containing tissues. Outline The known wet wipe support is about 50 or 60 N (for MD) and 8 N (In the case of CD). Where MD is the machine direction (ie, The direction of movement of the support through the machine producing the support) and CD is the transverse direction (In the plane direction of the support and perpendicular to the machine direction). Others that define strength Method, comparing these known supports with the supports according to the invention described below. In some cases, it may be preferable to pull the support to the point of break, which is generally N It is the workload expressed in m (Newton meter). This is the tenacity below Call. The test for measuring the tenacity will be described in detail below.   One method of making nonwoven substrates is hydroentangling. ing). In this process, textile fabrics, e.g. For example, the carded fabric moves under at least one orifice array Preferably, it moves beneath a continuous array from which jet water is jetted. Each array Extends transversely about the path of fabric movement, and To provide a jet. These jets behave like sharp needles, providing support The fibers are entangled to form. This entanglement eliminates the need for adhesives and thermal bonding Retain the fibers in a coherent support. In this embodiment, the orifice is roughly About 80 to 180 micrometers, preferably about 90 to 150 micrometers. Torr diameter and typically about 800-17 per meter orifice array It has 00 nozzles. The water is supplied in the first area, which is as large as 30 bars (bar). From the ray to the last array, which can be as large as about 250 bars. It is supplied to the orifice array at high pressure.   This gradual increase makes the movement increasingly difficult as the fibers become entangled. Provided to tolerate the fact that Orifice that combines everything The total energy delivered to the web by the liquid jet from the lay is 0.5 to 1.0 kWh / kg.   If the support is noticeably weaker than the conventional wet wipes support and other conditions Is satisfied, the softness desired by the user as well as the cleaning ability is From a point of view, it is possible to produce a wet wipe having better properties than a conventional wet wipe. It was discovered that it could be done. Manufactured using the hydroentangling process Low support by reducing the total energy input of the liquid jet Strength can be achieved.   Hydroentangling is the preferred method of manufacturing the support, Other methods known in the art can be used. For example, water is Or by a gas, such as air or steam. On the other hand, fluid "Needle" is a mechanical process in a process known as needle punching. Can be replaced by a needle. Such a thorn, for example, made of steel A needle is punched through the web, hooks the fiber tuft, and punched Glue it in the area. While the needle is trapped between the two plates, Go in and out of the web. And the web is pulled through the device by stretching rollers Can be   Another method used is thermal bonding, where the fibers are made of a thermoplastic material, i.e. It has a thermoplastic outer layer and is bonded by heat at discrete points. This bonding is This is achieved by using a drum having at least one thermal element in the part. Ma It also has an external surface that carries an embossed pattern that the fiber layer is pressed to contact. I do. However, the support produced in this way is hydroentangled. Is not as soft as that produced by An essential part has completely loosened fibers.   Another method of the present invention is the use of fibers and chemical baths, for example, in the manner used in paper manufacturing. And wet-depositing the mixture with Indah.   Needle punching, thermal bonding and wet deposition are well known per se, A detailed description of the above will be omitted. Hydroentangling is also well known Technology, but is usually used when performing hydroentangling procedures. Because there are many variations, they will be further described here.   That is, according to the present invention, a nonwoven fiber support used in a clean article is provided. This support has a major surface for rubbing the surface to be cleaned Both have low strength in one direction and rub while adhering to the support As a result of the operation, at least a portion of the long fiber that can protrude from the main surface is removed. Have.   The support is preferably 0.6 N in at least one direction when manufactured. m, more preferably less than 0.5 Nm. This tenacity is 2 Less than 1.2 Nm in each of two mutually orthogonal directions. Good tensile strength Preferably, it is 45N or less. After the rubbing operation is performed, The strength is preferably reduced by at least 15%, preferably at least one Less than 0.5 Nm in the direction and 0.6 in each of two mutually orthogonal bills Is less than. The tensile strength after the rubbing action is preferably in at least one direction 10N or less, and 30N or less in each of two mutually orthogonal directions. Below.   The present invention further provides a wet wiping body comprising the above-described support and a cleaning liquid. I do.   The present invention also provides a method for producing a nonwoven fibrous support for use in cleaning articles. Providing a method, having a main surface for rubbing the surface to be cleaned, the fiber layer is less And a fiber layer, part of which is a long fiber, Ngling. The liquid jet produces a coherent support and For the fibers, at least as a result of the rubbing action while adhering to the support, A force is applied to the fibrous layer that is low enough to protrude from the major surface. The support according to the invention thus comprises two substrates, defined below as (a) and (b) And preferably also have the properties defined in (c) and (d) . (A) Low strength   This is due to friction caused by the support rubbing the skin or other surfaces to be cleaned Allows a large amount of surface fibers to leave the surface of the support when receiving Is necessary for Low strength is in MD or CD or both directions . (B) Presence of relatively long fibers   At least a portion of the fiber (preferably at least 20%, more preferably less At least 40%, even more preferably at least 60%, even more preferably Is 80%) from the surface of the support book as a result of the friction created by rubbing It has sufficient length to remain attached to the main body of the support even if it is. One In a preferred embodiment, substantially all of the fibers are long fibers. Such fibers The fiber has one end attached and the other end extending from the support surface, or both ends attached As such, the central portion extends from the support surface. Here, “long” is roughly At least 2 cm, more preferably at least 2-5 cm, more preferably at least 3-5 cm Also have a length of 3 cm. (C) Ability for loosened fiber parts to stay away from the support surface   The important point here is that the loose fibers tend to remain facing the support surface. In other words, the desired effect cannot be achieved. To avoid this tendency One method is that at least a portion of the fiber under consideration is such that the support is It has a relatively high fiber hardness even when wet, and tends to protrude from the support surface. And In order to provide such hardness, such fibers must be dried at least. Also 2.5 cN, more preferably at least 5 cN, even more preferably 10 cN It should have a tensile strength of N. However, they are so hard At least the product used against the skin, not against the skin The hardness is such that it does not give a sensation, so the tensile strength does not exceed 30 cN, More preferably it does not exceed 20 cN.   The support may be replaced by fibers having at least a predetermined stiffness, or Is an aqueous solution or emulsion in which, in addition to such fibers, the continuous phase is moist, If it contains certain cleaning liquids and is used for articles such as wet wipes, If these fibers are hydrophobic and do not absorb the cleaning liquid contained in the wet wipe The desired effect can be obtained. Fiber materials with suitable hydrophobic properties are polypropylene Polyethylene such as polyethylene, polyimide such as nylon, polyethylene Contains terephthalate.   The liquid carried by the wipe or the cleaning article, for example, the oil forms a continuous phase When the main component is oil in the form of an emulsion, the fibers are supported by hydrophilicity. It protrudes from the surface of the holding body. Viscose fiber is a suitable fiber material for this purpose. And cotton fibers. Another possibility for cleaning liquids is silicone emulsions The fibers then protrude from the support in the presence of such an emulsion. (D) Texturing   This is an essential property for the following reasons.   In the attached drawings,   FIG. 1 illustrates the use of hydroentangling to produce a support according to the invention. It is a perspective view of an example of a device that can be used,   FIG. 2 is partly according to the invention and partly not according to the invention. A set of graphs showing body strength,   FIGS. 2 and 3 show the support according to the invention before and after the rubbing operation. It is an enlarged photograph of 1,   FIGS. 6 and 5 show a 25-fold magnification through the support compared to the support according to the invention. FIG.   6a-6f show Instron mechanical tests of various supports (described below). FIG.   FIG. 7 shows the Lissajous curve for the rub test described below.   The apparatus 10 shown in FIG. 1 comprises a continuous belt 12 with an upper run of hydroene. A tangling process is performed. In FIG. 1, the upper run is preferred to the right Moves at a speed of 25-75 m / min, more preferably 40-60 m / min. You. The belt has openings as described in detail below. Non-woven cotton or A fiber layer 14, such as another initial fiber layer, is formed into a belt as illustrated by arrow 16. Supplied. The initial fibrous layers may be in a random Suitable for loose fibers arranged in some degree of alignment, such as that produced by Consisting of proper web, mat, cast cotton. The initial fiber layer is carding, lander Manufactured by any desired method, such as laydown, air or slurry deposition.   The initial fiber layer then passes below a plurality of orifice arrays 18. Each array is It extends across the line of movement of the belt 12 and the fiber layer 14. In the figure, five arrays 1 Although only eight are shown, the number of arrays may be less or more. For example, 2 to 15. Only a single nozzle array is shown, but multiple arrays I is desirable. Each array 18 has a lower side forming at least one row of orifices. It has a plate with holes on top. Generally has a single or a pair of parallel rows And the orifices in one row are staggered with respect to the orifices in the other row. I have. Each row is provided parallel to the length of the array 18. Preferred embodiments of the present invention The orifices used in have a diameter of 100-120 micrometers, e.g. For example, they are arranged at about 0.6 mm (centres).   Water is supplied via high pressure lines 20, one per line, and individual pressure regulators 22. Supplied to Ray. This means that the pressure is different for each array. sand That is, as described above, the pressure increases from an upstream to a downstream of the belt. It gradually increases from a to the next array. The total pressure applied to each array is Preferably it is 40-1100 bar, more preferably 40-200 bar. The water flow rate through each array is 2.5 m3 / hr for each meter length of the array Because. The flow velocity of each water jet is more preferably 40 to 110 m / sec. Is 40 to 100 m / sec. Energy flow for each water jet is good. Preferably 300-14000 bar m / sec, more preferably at least 80 0 bar / sec. Total input to the web from all array combinations The power is preferably from 1.0-120 kW / m of web width, more preferably Or less than 100 kW / m. The total energy input to the web is material preferred From 0.005 to 0.8 kWh / kg, preferably 0.5 kWh / k g. More preferably it ranges from 0.1 to less than 0.5 kWh / kg It is. Even more preferably the upper limit of this range is 0.4 or 0.3 and the range The lower limit is 0.2.   Vacuum boxes 24, one for each array 18, are placed after passing through the belt. It is provided below the belt to remove the water.   As mentioned above, the belt is in the form of a wire grid, preferably square, More preferably a square grid, defining a corresponding array of apertures I have. For example, the grid is cm^Two12-30 openings per cm, preferably cm^TwoAh It has 20 to 30 openings. However, the finer or the eye A rough grid can be used, and the openings can be square or square. It is also possible to arrange them so that they do not constitute a node.   As mentioned above, although water is lower than conventional, water Used to supply an amount of energy that is sufficient to run. This one effect The support thus formed has at least these positions during formation. Extends substantially just above the wire crossing point of the belt with respect to a substantial portion of the It is not to have an opening part. Preferably 50% or less of the position, more preferably Form openings that are 30% or less open. Generally, at least some of the locations A percentage, for example, at least 5%, provides open openings. The opening is open Other than that, the support book has reduced thickness formed above the wire crossing point and ridge. Area. The lack of multiple openings in the support provides support for wet wipes This is an advantage when used as a body. If there are multiple openings, these are Dirt and other objectionable materials can be cleaned from the surface to be cleaned It flows into the hands of The.   The presence of the above-described ridge of the support has at least two major advantages. One is the support without increasing the amount of material required during manufacture in proportion. It is to increase the thickness of the material. Another is that the ridges are created during the rubbing operation. The resulting friction forms an initial area where the partial decomposition of the support surface begins. Thus, the above-described desired effects can be obtained.   The size and nature of the entanglement produced by the water jet is particularly dependent on belt speed and Depends on the direction of the Set the belt movement direction (MD) to the y direction and place it on the belt surface. Assuming that the transverse direction is x direction and the direction orthogonal to the belt surface is z direction, x and Is the difference between the components of the belt speed in the y direction, and the component of the jet speed in the same direction The greater the is, the greater the entanglement effect in that direction. That is, As in a conventional hydroentangling device, the belt is large in the y-direction. Moving at a fast speed and the jet is directed directly along the z-axis A considerable amount of entanglement occurs in both directions, which is greater in the y direction than in the x direction. No. Thereby, the resulting strength of the support in the x direction is greater than in the y direction. Much smaller. The higher the belt speed, the higher the ratio of energy to entanglement in the y direction And the ratio in the x-direction decreases.   Each strength in these two directions is upstream (increased entanglement in the y-direction) and downstream (y Direction entanglement), lateral direction (increase in x-direction), and combinations thereof Can be changed by changing the angle of the jet. For example, the jet angle Upstream or downstream up to 45 degrees with respect to the plane perpendicular to the tilt and / or laterally Can be changed up to 45 degrees. In addition, some jets are In different directions with respect to other jets It is possible. In addition, some or all orifices are jetted from the jet It can be shaped to give a rotational movement to it.   In the above description, the surface on which hydroentangling occurs is a belt. However, this is just an example, and this surface Is a suitable moving surface, and the movement is circular when using a drum. .   Also, the device shown in FIG. 1 has a water jet on only one surface of the support. Only However, it is desirable to perform hydroentangling from both surfaces. In this case, the web of FIG. 1 comprises a second opposed orifice array and a vacuum. Pass through the box assembly. On the other hand, the initial web is an orifice on one side of the web Rays pass through an assembly alternating with orifice arrays on the other side.   Further information on hydroentangling can be found, for example, in US-A-28 62551 (Kalwaites), US-A-3025585 (Griswold), US-A-3 485706 (Evans), US-A-5204158 (Phillips et al), US-A -5320900 (Oathout), EP-A-0418493 (Fiberwet). ing. These contents are described here as prior art. Implement the invention Hydroentangling equipment suitable for use is ICBT Perfojet, Z.A. Pre-M Available from illet, 38330 Mount Bonnot, France.   Various fiber compositions are used to make the support, but preferably the composition is It contains enough fibers to have the desired ability to protrude from the surface of the support. Use Examples of fiber compositions that can be used include hydrophilic (eg, cotton, viscose, flax) and sparse. Of aqueous (eg polyethylene terephthalate or polypropylene) fiber material It contains a mixture or purely hydrophilic or purely hydrophobic material. Preferably a hydrophilic material from 30-70% and a hydrophobic material from 70-30% Material. All these percentages are by weight. Particularly preferred two pairs The composition is 50% viscose / 50% PP and 50% viscose / 50% PET. . The advantage of having such a large amount of viscose fibers is that the surface And the ridge is 10 micrometers high. Those ridges Provides additional friction to initiate partial disassembly of the carrier.   Preferably the support has at least 30 gm^-2Basis weight. Support book is wet 150 gm when used as a wiping body^-2The above basic weight is required , But in theory a higher basis weight is used. The invention is essentially The support is not too thin, considering what the surface effects are The thickness may be said to be roughly unrelated to the present invention. I However, in practice, in the field of conventional wet wipes, the basis weight is preferably 3 0-130gm^-2, More preferably 30-70 gm^-2, Even more preferred Ku is 55 to 65 gm^-2It is. Also, by the hydroentangling process 55-65 gm when produced by the method of the present invention^-2Basis weight and textured Products with a textured surface, typically including testing, have a thickness of approximately 0.8 mm. Have. The texturing described above is hydro-entangled with respect to apertured surfaces This can be achieved by implementing a ring. Total thickness is less than about 0.4mm Then it is difficult to incorporate a textured surface, such a surface This is a great advantage for the reasons described above. Preferably, the thickness of the support is from 0.4 mm to 2. 0 mm, more preferably 0.4 to 0.95 mm. The bulk density of the support is preferred 0.1g / cm^ThreeOr less, preferably 0.9 g / cm^ThreeIs less than Preferably 0.8 g / cm^ThreeIt is as follows. In determining the density, the support Is calculated using the thickness of the support including the texturing.   As mentioned above, the support produced according to the present invention is It has better cleaning properties than that obtained by The main reason for this is The fibers protruding from the support surface as the cleaning process proceeds provide an additional cleaning surface. It is considered to be offered. However, the actual cleaning mechanism is a substitute for the above factors. Or other factors in addition to the factors described above, It must not be based on a definite theoretical explanation.   There is an increase in the softness of the support with an improved cleaning effect. This is two It is thought to be due to the mechanism. First, the low strength of the material means that Limits the amount of friction that can be obtained with the surface to be Will be. As the friction begins to exceed its limit, the individual fibers are By being particularly stripped from the surface, a further increase in frictional force is prevented. Traditional At the support, at least until the frictional force becomes very high. Has no limiting effect.   A second related mechanism is that the support is perceived by the skin it contacts. The protrusion of the fibers from the support. These fibers are relatively stiff The user feels soft because it bends freely. Such softness is mentioned above Factors other than the above factors, or other factors in addition to the above factors. And does not depend on the specific theoretical explanations given above.   Comparison of supports not according to the invention for the four supports of the invention (Examples 1-4) This will be described below together with an example (Example 5).   Examples 1-4 have the same fiber composition, ie, 50% viscose, 50% polypropylene Made from. All fibers have a length of 4 cm and are equal to 1.7 dtex It has a large diameter. Examples 1-4 are all made in the same way. The only difference is The basis weight of the support is as follows (the basis weight of Example 5 is for completeness Given):   Example 1: 60.7 g / m^Two   Example 2: 62.8 g / m^Two   Example 3: 55.8 g / m^Two   Example 4: 59.2 g / m^Two   Example 5: 63.2 g / m^Two   Example 5 uses the same fiber composition and fiber diameter as Examples 1-4.   The device used in Examples 1-4 has 25 openings / square arranged in a square grid. cm with an open belt. The line moved at about 50 m / min. 13 Orifice arrays are used, each array having approximately 16 per meter of its length. It has 66 orifices, each orifice has a diameter of about 100 micrometers. Have. Example 5 was made using a belt without openings. In all of Examples 1 to 5 The jet was directed in a direction perpendicular to the fibrous web. Examples 1-4 are compared Other process conditions for Example 5 are listed in Table 1 below.   The ranges given for pressure and jet velocity take into account the direction of web travel. , These represent an increase by one array for the next. You All values are approximate and give accurate values to the extent known to the applicant.   Various properties of the supports of Examples 1 to 5 were tested and a further comparative support, Example 6 A hydroentangled support, as in 1-4 but different from Example 5 It has an opening. Example 6 was made using more energy than Examples 1-4. Example 6 has a basis weight of 53.9 gm-2. The results of these tests are listed in Table 2. Have been. The manner in which the various tests were performed is described later in this specification.   The modulus values are relative to the initial modulus and are given in Table 2.   From the above, in the present invention, the initial CD elastic modulus is very low, Even if there are openings, the density is low.   After further tests have been performed and given a rubbing action, some of the entries in Table 2 Was repeated for Examples 2, 5, and 6. This rubbing operation is performed, for example, in a wet wiping body. It is intended to simulate what the support will experience when used. The results are listed in Table 3.   From the above, the rubbing action substantially changes the characteristics of Example 2 (according to the invention) However, Examples 5 and 6 (not the present invention) had no significant effect. No. In each case, the changes in Example 2 are consistent with being much weaker than Examples 5 and 6. And the effect of the rubbing motion, the support produces the desired feeling for the user Not to cause complete decomposition (undesired) It is to be.   In particular, in Example 2, the thickness was greatly increased, the tenacity was sufficiently reduced, and both supported It reflects the partial breakdown of the body.   2 and 3 show the extent to which the rubbing action breaks the support according to the invention. ing.   Comparison between FIG. 4 (Example 2 after rubbing operation) and FIG. 5 (Example 6 after rubbing operation) After the rubbing action and in the presence of a large number of projecting fibers, the density of the support of the invention Just shows what is low.   Various modifications are possible to the invention as described below, of which Some are described below. (A) The orifice is uniform, eg, 1 mm centres along the entire effective length of the array Using orifice arrays for spaced hydroentangling Instead, each array has an area of, for example, 1 cm and is 100 micrometers centimeter With orifices arranged at res intervals or without orifices It has an area of 0.5 cm. This effect is due to the fact that entangled and non-entangled fibers Are arranged alternately. The former provides strength to the support, the latter Provides fibers that are easily unwound from the support as a result of the friction of the rubbing action. (B) The support can be multilayered. One possible configuration is the middle layer (high A material that is droentangled fiber, or substantially any material, Formed by hydroentangling according to the invention. Is a sandwich structure sandwiched between outer layers of coated fibers. This is related to the present invention. Clean properties and softness, but with other properties, such as added strength from the central layer. It is also possible to have. Another possible configuration is that at least one of the layers is a layer of the present invention. One of the two layers formed by droentangling.   The following describes how the above test was performed.   The following tensile strength characteristics of the previous example were measured by an Instron tester under the following conditions: Is evaluated. All tests are performed in laboratory conditions at 21 degrees and 65% humidity It was conducted. The length of the Instron gauge is 10 cm. The elongation rate is 10cm / min Or 100% / min. Instron "Jaw" for fixing samples Is flat and rubber coated.   The tensile strength, initial elastic modulus, and tenacity in the MD and CD directions are 15 Determined by 1 "(inch) wide strips cut to cm. The tip is loose with respect to the Instron tester in the jaw set at a distance of 10 cm. Fixed without tension and tension. Input to the sample from the Instron machine The resulting energy is plotted over time. The y-axis is applied to the sample Force in Newtons and the x-axis represents the sample at the specified elongation. The friendship rate is shown in%.   The tensile strength number is defined as the maximum force from this force over the elongation curve.   The initial modulus number is obtained from the graph generated from the same test. It is power / extension Initial slope of the rate-of-change curve, in units of Newton /% elongation, shown on the y-axis .   The tenacity is obtained from the same test and result graph. Persistence is% elongation It is defined as the area under the whole curve in Newtons by the rate.   The thickness of the support is determined according to the standard EDANA nonwoven industrial methodology, reference method # 30-4-89. It is measured using   The entanglement frequency is measured by an Instron tester with the indicated variable width strip. Is evaluated from the following data generated:   From Example # 2, the entanglement frequency is calculated by the following equation.   From this equation, the entanglement frequency for Example # 2 in the CD direction is calculated as 11.7. Can be Further details of the concept of entanglement frequencies are given in US-A-348 cited above. 5706. Wear or rub test   In this test, the support to be tested is the other of the same support to be tested. Rubbed against fixed piece.   One standard device suitable for doing this is the Textile Machine Journal Vol 33 N o 9 "Santra Martindale Wear Machine" described in September 1942. However, use any machine or laboratory equipment that provides: it can.   The test support to be evaluated is a fixed, stretched, Fixed to the position. Circular fasteners holding this material in place have a 5 "diameter. (Inch). A rub test is then performed on the area of the sample in this fixed circular fastener. Done.   A second sample of the test material was a 1.75 "diameter flat, hard-end screen. At the fixed position on the Linda, it is fixed in a stretched but not stretched state. This second The second sample is then rubbed against the first sample for testing. First sample The normal force or absolute mass (weight) of the second sample is 0.68 kg You.   A second sample having this weight then completely encapsulates the test sample shown in FIG. For the first sample in a repeating pattern known as the surrounding Lissajous pattern Can be rubbed.   One cycle is 10 cycles for the test represented by the full pattern above. There is a kuru pattern. One cycle consists of 15 oscillations in one direction, The second set of 15 vibrations is perpendicular to one set of vibrations. One full of these 30 vibrations The cycle takes place over 18 seconds.   The support in the 5 "retaining ring is subsequently treated as a processed sample. This piece of support is used for Instron testing of ground or processed samples. It is then cut in the CD or MD direction to provide the appropriate width and length for the Instron test. The resulting strip is obtained.   For example, tensile strength, initial modulus and tenacity tests for Instron machines For testing, the treated strips were 1 "wide and 15 cm long. Cut into pieces.   6a-6e show curves derived from three different materials, as shown below. It is.   Figures 6a / 6b: Support according to comparative example 5   Figures 6c / 6d: Support according to the invention (Example 2)   Figures 6e / 6f: Support according to comparative example 6   Figures 6a, 6c and 6e are for MD and the quantities 6b, 6d, 6f are for CD Is for Rotation "normal" means before the rubbing action, "rubbed" Means after the rubbing action.   The ordinate of each graph is indicated by N, and the abscissa is indicated by% elongation of the sample. . To calculate the tenacity in Nm, the% value is given by% / 100 × 0.1 m Is converted to Where 0.1 m is the length of the strip to be tested.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI D04H 3/10 D04H 3/10 B (81) Designated country OA (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG), AP (KE, LS, MW, SD, SZ, UG), UA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IS, JP, KE, KG , KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, S , SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN

Claims (1)

[Claims] 1. A support for nonwoven fibers used in a cleaning article, having a major surface for rubbing the surface to be cleaned, having a low strength in at least one direction, and adhering to said support. A support comprising at least a portion of long fibers that can protrude from the main surface as a result of the rubbing action between them. 2. The support of claim 1, wherein the support has a tenacity of less than 0.6 Nm in at least one direction when manufactured. 3. The support of claim 1, wherein the support has a tenacity of 0.5 Nm or less in at least one direction when manufactured. 4. 4. A support according to any one of the preceding claims, having a tenacity of less than 1.2 Nm in each of two mutually orthogonal methods when manufactured. 5. The support according to any one of claims 1 to 4, having a tenacity of less than 0.5 Nm in at least one direction after the rubbing operation. 6. A support according to any one of the preceding claims, having a tenacity of less than 0.6 Nm in each of two mutually orthogonal directions after a rubbing operation. 7. The support according to any one of claims 1 to 6, wherein the rubbing action reduces the tenacity by at least 15%. 8. The support according to any one of claims 1 to 7, having a tensile strength of 45 N or less in any direction when manufactured. 9. The support according to any one of the preceding claims, having a tensile strength after rubbing operation of at most 10N in at least one direction and / or at most 30N in each of two mutually orthogonal directions. 10. 10. The method according to claim 1, wherein the long fibers have a length of at least 2 cm, preferably 2 to 6 cm, more preferably at least 3 cm, and most preferably 3 to 5 cm. The support as described. 11. Support according to any of the preceding claims, wherein the long fibers have a tensile strength of at least 2.5cN, preferably at least 5cN. 12. The support according to any one of claims 1 to 11, wherein the main surface has a texture. 13. 13. A support according to claim 12, wherein the fibers are in the form of a grid consisting of depressions and ridges, wherein not more than 80%, preferably not more than 50% of the depressions are open to the opposing surface of the support. The support of claim 12, wherein the recess is present from 14.12-30 depressions / cm ^2. 15. A wet wiping body having the support according to any one of claims 1 to 14 and a cleaning liquid carried thereby. 16. The support is wet wiping strip according to claim 15 having a density of 0.1 g / cm ³ or less when dry. 17． 17. The wet wiping body according to claim 15, wherein the cleaning liquid has an aqueous or an aqueous continuous phase, and the long fibers are made of hydrophobic fibers. 18. 18. The wet wipe of claim 17, wherein said hydrophobic fibers are polyethylene terephthalate or polypropylene or have an outer layer thereof. 19. 19. The wet wiping body according to claim 17, wherein the cleaning liquid has an oil or an oily continuous phase, and the long fibers are made of hydrophilic fibers. 20. 20. The wet wiping body according to claim 18, wherein the cleaning liquid is a silicon emulsion. 21. 21. The wet wiping body according to claim 20, wherein the hydrophilic fiber is viscose, silk, or flax. 22. The wet wiping body according to any one of claims 15 to 20, wherein the long fiber is formed of a mixture of a hydrophobic fiber and a hydrophilic fiber. 23. 23. The wet wiping body according to any one of claims 15 to 22, wherein all or substantially all fibers of the support are long fibers. 24. A method for producing a nonwoven fibrous support for use in a cleaning article, comprising a main surface for rubbing the surface to be cleaned, a fiber layer comprising fibers at least partially long fibers, Sufficient to produce a non-conductive support and as a result of the rubbing action while adhering to the support, at least a portion of the long fibers can protrude from the main surface. A method of receiving hydroentangling by a liquid jet applying a low force to said fiber layer. 25. 25. The method according to claim 24, wherein the liquid jet applies energy to the fiber layer of less than 0.8 kWh / kg of fiber layer material, preferably less than 0.5 kWh / kg. 26. 26. The method of claim 25, wherein the energy is at least 0.0005 kWh / kg. 27. 27. The method according to any one of claims 24 to 26, wherein the liquid jet is guided by the fiber layer while the fiber layer moves in a first direction at a speed of at least 25 m / min, preferably at least 40 m / min. The described method. 28. The liquid jet may be at a predetermined amount, preferably up to 45 degrees, when viewed from the first direction and / or a direction orthogonal to the first direction, at an angle away from a reference to the fiber layer. 28. The method of claim 27, wherein the method is led by a fibrous layer. 29. 29. The method according to any one of claims 24 to 28, wherein the fiber layer is arranged on a carrier surface having openings of preferably 12 to 30 openings / cm < ² >.