JPS5949728A - Surface cleaning tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an article suitable for wiping surfaces, particularly hard surfaces. The article has a small number of layers (both have two layers) and carries an active agent, such as a cleaning or disinfecting composition, which imparts a benefit to the surface being wiped.

The present invention is particularly useful for glossy hard surfaces such as borders, windows, chrome plating, polished ceramic tiles, and articles where substantially no streaks (5treak) remain after wiping. Applicable to, but not limited to, the articles of the invention are characterized by a particular surface structure which provides particular advantages for cleaning hard glossy surfaces.

British Patent No. 582006 [British Celanese:
] is a thermoplastic fiber that forms a "skin" on both sides by the application of heat and pressure, leaving the main body of the fiber intact! 1' containing batting material (battingma
, tθreal). Polished padding is useful as an insulator.

British Patent No. 1068432068432 [Bigel, 6w-8anford] discloses a thick-walled, sew-on non-woven fabric suitable as a carpet interlining, the main component of which is thermoplastic (polyolefin or polyester) fibers. χ is disclosed. The fibers on at least one outer surface are bonded or fused together into a flattened and stiffened state, such as by melting the surface fibers, while the fibers within the interior of the fabric are not bonded or fused.

British Patent No. 1130.857 Specification
Huyck)] has an inner absorbent layer and an outer (surface) layer of thermoplastic hydrophobic fibrous material,
Laminated disc cover for bandages and other dressings
at least some fibers extend from the outer layer to the inner layer;
Then, the outer surface of the outer layer and all the protruding fibers are laid down and pressed at melting temperature to create a smooth finish.

British Patent No. 1265258 [Shikkadanso (5)
Ctzickedanz) discloses a composite material suitable for sanitary belts and other similar products having an inner layer of bulky absorbent material, such as cellulose fibers. Typically 0.5-1.0 CT
An outer layer of thermoplastic mesh with a mesh size of L is melt bonded to one or both sides of the inner absorbent layer.

Scott Paper Co., US Pat. No. 3,579,257, discloses a single-brie fibrous web useful as towels and rags. A flexible, absorbent core is sandwiched between a relatively high fiber-concentrated, strength-rich surface area! :5, and this surface area contains a bonding material applied to the web at very narrow intervals.

U.S. Pat. No. 4,307,143,07143 [Kimberly-C1ark] discloses a rag consisting of a melt-blown, microfibrous synthetic web treated with a wetting agent and pattern bonded by high temperature Enges.

U.S. Pat. No. 40E32,878 (Freurlenberg) discloses an absorbent sheet material suitable for use as a cleaning cloth. A three-dimensional protruding pattern of foam rubber (5uperele-va.
It works like a squeegee when wiping a wet surface with a printed pattern).
do.

The present invention provides an article suitable for wiping a surface, which article comprises a liquid active substance (defined below).
5) carries χ, and a) at least U g /
a core of bulky fibrous sheet material having a basis weight of m, 2, and a porosity of c9J;
) flattened areas of thermoplastic
(ened area) and an open area (open area).
a) at least one external cleaning surface (ext
It consists of a sheet base material with a 5-surface surface.

A core (a) made of bulky material with high porosity
)＋! When wiping a surface with this article 2, it is absorbent and highly efficient at capturing dirt and any liquid present. This material has a relatively low density and high porosity, ie, the volume occupied by the voids is much greater by D. than the volume occupied by the fibers. Porosity is defined as: In practice, materials with a porosity of 2 in the range 80-99 are preferred, and those with a porosity 2 in the range 85-95% are particularly preferred, The upper limit is determined by the requirement that the structure must not be so open as to allow dirt to pass through the material without being captured by the network of #R fibers.

flLtHao 7) High porosity, both due to the random arrangement of the fibers and the clear demarcation of high- and low-density regions It will be clear that both types of construction can be used to advantage with the present invention, and examples of both are shown in Table 1. Suitable materials include wet-laid and Dry raid method (wet
-1aid anddry-1aid process
es).

The basis weight of the core (a) is preferably 401/m" or more, more preferably 5019/7B" or less, and 12
It may be as high as 0g/m2 or even 15C1.9/m2a degrees.

This type of material cleans both wet and dry surfaces.
However, in some cases the lint phenomenon (
There is a tendency to cause linting, that is, to leave fibrous debris on the surface after wiping. The problem of lint phenomenon is solved or substantially eliminated by the present invention with the presence of a special surface (b). Surprisingly, the presence of this type of cleaning surface results in 7Iv cleaning of glossy hard surfaces.
It has been found that the presence of the clear I'f# surface is useful in areas where improved cleaning and streak-free performance is obtained and where lint phenomena do not pose a significant problem.

Clearance 4@(b) is composed of a flattened region and an open region of thermally conductive material. The surface coverage of the thermoplastic material should be relatively high to substantially prevent the fibers of the core material from coming into contact with the surface to be cleaned. If the core material is prone to lint In that case,
Preferably, the average size of the open area is not larger than the average length of the fibers. For a core of wood pulp or other papermaking fibers, this may be on the order of 2-3 mm, but for synthetic nonwovens the fiber length may be much longer. The surface structure is also useful when the core material is a non-lint-prone core material, such as a spunlace nonwoven with very long fibers, in which case the dimensions of the open area and the length of the fibers of the core material Control of the dimensions of the open area in the cleaning surface (b) can be achieved in different ways depending on what the surface structure is made of.

The surface structure (b) which characterizes the invention can be produced in various ways, and the fused thermoplastic material forming the flattened region can be produced if the core material has a sufficiently high proportion of thermoplastic material. fibers, it can be derived from the core material itself or from an external source. In the latter case, the core material may not contain thermoplastic fibers.

Advantageously, such an external source is an outer layer of thermoplastic web or sheet material laminated by melt bonding onto the core material. Such a web or sheet material may have a suitable aperture structure to produce the flattened surface area of the present invention by fusion bonding after application of heat and pressure;
shall leave an open area of sufficient size and seating to permit the passage of liquid into and out of the core material.
must not. At the same time that the melting process causes flattening,
It must be remembered that spreading also occurs, so that when laminating the outer layer onto the core material, the dimensions of the open area of the outer layer are reduced.

According to a first, particularly preferred aspect of the invention, the cleaning surface (
The source of b) is laminated on top of the core material, @1
1'<8-251//m2) of a separate outer layer of heat-sealable fibrous sheet material.

Lamination is accomplished by the application of heat and pressure, causing a melt bond while simultaneously creating a flattened region of cohesive fibers on the surface.

Accordingly, in this embodiment, the article of the invention carries an active substance (as hereinafter defined) in liquid form and has at least 30. ! A core (a) of bulky, high porosity fibrous sheet material having a basis weight of i+/77L2 and laminated onto the core material, 8-2! M/m2
a sheet substrate having a layer of heat-sealable fibrous sheet material having a basis weight of It is melt bonded onto the core (a) without sticking and is fused into a flat area to form the cleaning surface (b).

Desirably, the outer layer has a basis weight within the range of 10 to 201/m2. The outer layer is a heat sealable material, i.e.
It is composed of a material containing a substantial proportion of thermoplastic fibers, preferably 60 or more fibers.

As the thermoplastic fiber, polypropylene fiber is particularly preferred. This outer layer may be made of a woven fabric derived from filaments or a dry-laid non-woven fabric (
It has a basis weight that is lower, preferably substantially lower, than the bulky, low density core layer.

1! It has been found that good results are obtained using fabrics having a basis weight in the range of M/m''.

As previously mentioned, the outer layer has a relatively open structure so that, despite the spread caused by the melt bonding process, it does not stain and/or remain in the finished product.
It is possible for the liquid to approach an adjacent bulky core.

Materials suitable for use as the outer layer include well-known covering materials for diapers and sanitary belts. Examples of these include Suominen (Finland r.
Novelin (trademark) 815 manufactured by )
and US 15, which include polypropylene/
It is a dry-laid nonwoven fabric derived from a viscose fiber mix, and has a size of about 15!9/7 W and 20 tsubo M2. Other suitable materials include Bondina LS 5010, manufactured by Bondina Ltd, UK, derived from polypropylene fibers and having a thickness of approximately 10 g/m20; Paratherms with the amount (P
arat, berm) PS 3 1 5 (o-
and Corovin P PSMED, which is derived from polypropylene fibers and has a basis weight of about 2 og7y.2.

The outer layer is bonded to the adjacent core material by some (or some) fusion bonding. Applying heat and pressure to the outer layer causes some or all of the thermal I5T plastic fibers to melt and bond to the adjacent bulky core. The bond between the two layers may not necessarily be by fusion bonding (but may also be achieved by other means, such as mechanical interlocking (such as needlepunching)). However, some fusion bonding of the outer layer to the bulky, low-density core is necessary, so that some portion of the latter fiber is substantially bonded at its outer surface. The fibers coalesce to such an extent that they are indistinguishable from each other, resulting in a flattened area on the surface (b).Such fusion bonding can be achieved by applying pressure at the same time as heating (if the outer layer is applied only to one side of the substrate). It is most convenient to apply from the side of the outer layer).

It is advantageous for the outer layer to consist of a non-woven fabric comprising a mixture of different fibers, some of which are thermoplastic and some of which are not. Non-thermoplastic fibers do not change with the application of heat and pressure and provide toughness (RO) to the substrate.
'bus'ness) and integrity
y). Nopelin 815 and US1 as described above
Particularly preferred are mixtures of polypropylene and viscose fibers such as 5 and Paratherm PS515.

According to a second aspect of the invention, the source material of the surface structure (b) which characterizes the invention is an outer layer of a different type, namely fused to the core material (a) by the application of heat and pressure. , mesh size of about 5 plates or less and 2 to 20.9
A sheet of thermoplastic reticulated material having a basis weight of /m2.

Such mesh or reticulated materials are produced by scoring and stretching sheets of thermoplastic film material, such as polyethylene or boria-robilene. A series of suitable materials are manufactured by Smith & Nephew (UK). These meshes have different patterns of polyurethane. The term "mesh size" as used in IIv refers to the maximum dimension of the apertures in the sheet. Examples of these materials include meshes of approximately 2 mm. X230 with dimensions and X3 with mesh dimensions of approx.
530, both of which are products of Smith & Nephew, and have a basis weight of 18 g/m2.

Similar to the outer layer of fibrous material used in the first aspect of the invention, the thermo-OT plastic reticulated sheet is melt bonded to the core material (a) to form the surface (b) by the application of heat and pressure. During this process, some spreading occurs and the effective mesh size is reduced. Therefore, a net having a mesh size of 5 rnrn typically has a typical papermaking fiber length of 2
~6 mm) substantially reduces the lint phenomenon of the core material. Preferably, the net has an initial mesh size of less than 3 mm, and even more preferably less than 2 m111.

According to a sixth aspect of the invention, the coalesced and flattened thermoplastic material of the cleaning surface (b) is not induced from the discontinuous portions of the porous material, but is formed using heat and pressure into the core material ( a
) is applied discontinuously to the surface of For example, thermoplastics as powders.

Alternatively, it can be pasted using a printing method.

In use, the thermal 0T plastic material should be applied to provide sufficient surface coverage to substantially prevent contact between the bulky core material (a) and the surface to be cleaned, while the liquid It is also necessary that there be an open area of sufficient size and quantity to permit entry into and exit from the core.

Similar to the IJH embodiment described above, if the core material is susceptible to lint, the open area will generally be substantially larger than the average fiber length of the core material. must not.

Furthermore, apart from the minimum degree necessary for adhesion, the temperature should be such that there is no substantial degree of penetration of the thermoplastic into the core material. This is essentially a surface treatment, leaving most of the core unaffected.

Among the three embodiments of the present invention described above, the first embodiment in which the surface structure is derived from adhered thermoplastic fibers is preferred. According to a fourth embodiment, which is in fact a variant of the first embodiment, the bulky core material (a) itself contains sufficient thermoplastic fibers so that when subjected to heat and pressure treatment, A cleaning surface according to the invention is obtained even without the presence of a separate outer layer.

In this embodiment, the lofty layer preferably comprises 60% by weight or more, and more preferably 45 or more fibers, of thermoplastic fibers, such as polynisder, polyethylene or polypropylene.

An example of a suitable material of this type is composed of 50% by weight polyester fibers and 50% by weight viscose fibers.
Bonded Fiber Fabric Co., Ltd.
d Fiber Fabric Ltd, ) n's X
It is LA150. Basis weight of this item -150F/m2-
is very high (and the porosity before treatment according to the invention is 97%). This porosity is slightly reduced by the heat and pressure treatment according to the invention.

The surface structure that characterizes the invention is produced by applying heat and pressure. In the first, sixth and fourth embodiments, this treatment is carried out, for example, by passing the substrate between heated rollers.

By doing so, the external surface becomes a relatively flat area of fused thermoplastic material and an open area. This can be seen using a light or electron microscope. Of course, these open areas are absolutely necessary to allow the liquid active material carried by the article of the invention to pass through, and also to pick up dirt and direct it to the bulky core material. The open area is also necessary to impart appropriate flexibility to the base material.

It has been found that when this type of surface is used to wipe glossy surfaces, a very good cleaning effect without leaving any streaks can be obtained. It is inferred that the flat areas of molten thermoplastic help to direct dirt and/or liquids into the interior of the article, i.e. into the absorbent IW's low density core. The scope of the invention is not limited by this hypothesis).

The substrate of the article of the invention is similar to that specified above:
It goes without saying that scales contain additional layers, but there are only a few (
Both external surfaces must be as specified in (bl) above and must not be directly adjacent to the bulky core as specified in (a) above.

In the case of simple wiping, both surfaces of the article are
It would be advantageous for the consumer to be able to distinguish between the two surfaces, each of which has an external surface of type (b). The low density core layers can be placed back to back, with additional layers between them if desired.Other arrangements will be apparent to those skilled in the art.

The article of the invention carries a liquid active substance that provides a benefit to the surface being cleaned. The term "active substance" as used herein is not limited to surface-active or detergent-active substances (but includes all useful substances).

To clean glossy surfaces so that they are virtually free of streaks, see European Patent No. 67016 [Unilever].
It is advantageous to use a liquid active substance as defined in Unilever ) ) (Case C, 1094), i.e. the substance has a surface tension of less than 4.5 mNm, preferably less than 40 mNm. , when applied to the surface and dried, 0.25 μrn (preferably 0.1
It is a homogeneous aqueous solution that dries with substantially no formation of discrete droplets or particles larger than 1 μm).

If discrete droplets or particles larger than 0.25 μm are formed during drying, visible light (wavelengths 3.4 to 0.7
μm), which is visible to the eye as streaks.

It is desirable that the liquid composition dry substantially without forming discrete droplets or particles larger than 0.1 μm.

Liquid cleaning compositions are in the form of homogeneous aqueous solutions. The reduction in surface tension (values for water are above 70 mNm') is preferably achieved at a concentration of 1.5% or less, more preferably at a concentration of 0.009 to 1%, especially 0.00%. This is conveniently achieved by adding a surfactant to the liquid composition at a concentration of 0.2 to 0.2 parts.

Nonionic surfactants are preferred, and one class of surfactants that give good non-striking results are surfactants 016-
C20 alcohols, especially linear primary alcohols and 15~
It consists of a condensation product with 20 mol of ethylene oxide.

One example is the condensation product of tallow alcohol and 18 moles of ethylene oxide.

It is desirable that the electrolyte content in the liquid composition be as low as possible, and all water contained should be deionized.

The liquid composition may advantageously contain, together with water, at least one water-miscible solvent, preferably a lower aliphatic alcohol such as ethanol or inzolopanol.

Numerous examples of continuous stain-leaning compositions are disclosed in European Patent No. 6.
No. 7016 Skin (Unilever) (Case 0.10
94).

For streak-free cleaning, it is important that the base material is substantially free of streak-forming impurities that tend to ooze out from the liquid composition and deposit as streaks on the surface to be cleaned. Although some substrates do not inherently contain such impurities, most papers or nonwovens contain binders, and some binders can cause streaks. Vibrant binders, glues, clays, fluorescent brighteners, textile lubricants, emulsifiers, or other processing agents are also present in papers and nonwovens and can also contribute to the formation of streaks. Therefore, it is desirable to pre-treat the substrate in advance to remove any substances adhering to it that may cause or contribute to the formation of streaks.

This treatment is preferably carried out by pre-cleaning the substrate with a solvent capable of removing impurities before applying the liquid composition. In some cases, washing with heated or boiling deionized water may be necessary, while in other cases, presoaking in excess of the liquid composition itself may be sufficient.

Some binders used in paper and nonwovens, particularly cross-linked cadopolyalkylimines (katpo
lyalkylimine) does not appear to cause problems with streaking, and substrates containing only this type of binder do not need to be pre-washed.

Liquid actives, desirably non-streaking cleaning compositions, can be deposited into the articles of the invention in any suitable manner. In its simplest form, the substrate is impregnated with a liquid active substance. In the case of very viscous liquids, painting is preferred; however, since the streak-free cleaning compositions of the present invention are generally very fluid liquids, impregnation is more suitable than painting. There is.

If the article of the invention is of the wet impregnation type,
It goes without saying that the liquid active ingredient should be packaged in such a way that losses due to evaporation of volatile components contained in the liquid active ingredient are substantially eliminated. For example, these items can be coated with metal foil and (
or) may be individually packaged in moisture-proof sachets such as plastic film. Alternatively, at regular intervals in a container that can be sealed with a lid, as is known from the various personal hand towels and baby wipes currently available on the retail market. Continuous rolls of perforated wet substrate can also be packaged.

However, according to a highly preferred embodiment of the invention, the article carries the liquid active substance in controlled release form. In that way, the liquid active ingredient is released over a relatively long period of time in accordance with consumer preferences, and the article can be reused to some extent. It may be advantageous to include a liquid in some type of medium, for example one that releases the enemy only when a stimulating pressure is applied.

For example, distributed within or applied to a substrate,
Liquid can be contained within microcapsules that collapse when pressure is applied. If microcapsules are included in the material that makes up the base material, they can be
The microcapsules may be evenly distributed, or alternatively, the microcapsules may be coated onto a preformed substrate.

Alternatively, European Patent No. 68860 (Unilever)
(Case 0.1300), it is also possible to incorporate liquids into polymers with a high degree of porosity. This polymer has the ability to hold less (both 5 times and preferably both 10 times less) of water or other equivalent blue liquid than its own weight, and when pressed by hand, the liquid A pressure-sensitive, porous polymeric material capable of release.A preferred type of porosity is 1° (the polymer has a porosity of at least 90°) in which the aqueous dispersed phase of the emulsion is
*% and the continuous phase contains hydrophobic monomers.
It is a polymerization reaction product of al-pHase emulsion). Particular preference is given to homo- or copolymers of styrene.

A preferred form of the article of the invention for containing a liquid active substance in a medium capable of controlled release is a sandwich structure in which the medium is sandwiched between two substrates, and the medium is sandwiched between two substrates. An article using the substrate of the present invention in one, and preferably both, of the substrate.

Advantageously, each substrate has on both sides surfaces of the type previously defined (bl), which surfaces are thermoplastic and are suitable for heat sealing the two substrates together. Therefore, for each substrate, one type (b) surface can be used for cleaning and the other surface for heat sealing to other substrates.However, if each substrate Other closing methods can be used if only one side thereof has a surface of type (b).

If the medium that allows for controlled release is, for example, MicroCab7 or 7J? In the case of discrete granules or particles, such as rimmer beads, it is easy to heat seal the substrates together, both at the edges and at other uninterrupted locations. One convenient arrangement is to utilize a checkered heat seal to create isolated pockets of liquid carrier medium. This approach helps ensure that the liquid carrier medium is distributed relatively uniformly over the entire area of the article.

If the liquid carrier medium is in the form of a porous polymer that cannot be heat-sealed, the polymer
In cases where the polymer cannot be ground into powder or granules without destroying the polymer, a sheet of polymer can be sandwiched between two substrates. It is advantageous to utilize squares arranged in an orderly manner between two substrates heat-sealed together in a checkered pattern, as described in the above-mentioned EP 68830 A W.

Some articles of the present invention constructed in this manner will be described below with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, a wipe 1 suitable for use on glossy hard surfaces consists of a lower substrate 2 and an upper substrate 3. Each substrate is made of a bulky, high-porosity fibrous sheet material, such as a low-density wet-strength loft paper called Hyloft™ 3051 (Tsubo II: 85 g/CTL).
2, porosity 92) and a lightweight thermoplastic fibrous sheet material melt-bonded onto the core 4, such as a dry-laid polypropylene/viscose non-woven material designated Novelin™ tJSl 5. m cloth (tsubo i115
,! A layer 5 of i'/m2) is carried on the outside of the core. The external surface of each substrate has a flattened cohesive region that characterizes the invention.

The insides of the substrates 2 and 3 also bear a melt-bonded layer of lightweight thermoplastic material, the two substrates 2 and 3 having their edges 7 and the first They are heat-sealed together via the thermoplastic layer 6 adjacent to them along the grid pattern 8 shown in broken lines in the figure, thereby forming a plurality of compartments 9. These compartments are each approximately 1.3 x 1.3 cnL, each containing 1 CTL x
It includes a 1 cm square section 10. For clarity, the thickness of article 1 is exaggerated relative to its surface area.

Figure 6 shows an alternative article. In this case, the substrates 2 and 3 carry only on their outside a melt-bonded surface layer 5 of lightweight thermoplastic fibrous sheet material.

The substrates 2 and 3 are bonded together along the edges 7 and the checkerboard 8 by an adhesive 11 previously applied to one or both of the substrates.

FIG. 4 shows yet another embodiment of the article. In this case, the base material 2
and 3 carry on their insides a thin polyethylene film 12, which is used to heat-seal the edges 7 and latticework 8 together with the substrate. This film is provided with pinholes 13 to allow liquid to pass through.

Advantageously, the porous polymer 10 is a high porosity polystyrene as described in the aforementioned EP 68860, and the liquid active substance is e.g.
The composition may be such that it cleans shiny, hard surfaces without leaving any streaks. In use, the appropriate amount of liquid is driven into the polymeric substrate by wringing the wipe. If desired, the substrate can also be pre-impregnated with a liquid. Using a damp cloth to wipe a shiny, hard surface like a window or mirror will leave the surface clean and free of streaks.

The invention will now be explained in more detail by means of non-limiting examples.

Example 1 A streak cleaning composition was prepared as follows: Thiisozolopanol 10.0 Add deionized water to 100.0.

The surface tension of this composition is approximately 37 mNm-1 and does not leave droplets larger than 0.1 μm when dried on a glossy surface.

Six sets of substrates (A, B and C) were produced.

The base material of 1st set) A is Hyloft (trademark) 3
051 (basis weight 85 g/m2, porosity 92), while the substrates of Setsu) B and C were coated with Novellin ( Both were made of a melt-bonded dry-laid polypropylene/viscose nonwoven fabric called US 15 (Trademark) US 15. This melt bonding was done by passing the three layers together between heated rollers. The fusion bonding to the base material of set C was performed lightly so that the fibers in the outer layer essentially remained as fibers, whereas the fusion bonding to the base material of set C was performed more strongly. .

The fibers on the exterior surface were rendered virtually indistinguishable as fibers, and the curtains were fused together to form a plateau.

All substrates were pre-cleaned using the cleaning composition described above to remove streak-forming impurities and then impregnated to known levels.

The following tests compared the streak-free cleaning performance of various impregnated substrates. A 1m clean area was sprayed with a Humbrol spray gun using the following simulated dirt, which resembles typical airborne dirt in a kitchen environment.
2 sprays were applied to the glass: Titripalmitin 1.0 Glycerol Trioleate) 0.5 Kaolin 0.5 Palmitic Acid
0.2 paraffin oil
0.2 carbon black
0.005 ICI made Ken9kleen (Ge, nkl
ene) (trademark) solvent (chlorinated hydrocarbon)
shall be.

The article produced as described above was then used by a skilled worker to clean the surface to ensure that the final result was as free of streaks as possible. The contamination-cleaning cycle was repeated a number of times and the process continued until the article was cleared of expiry, either due to dryness or excessive streaking. During the course of the test, the weight of the liquid used to perform the cleaning and the weight of the deposited dirt were measured, and the surface was evaluated by the operator for streak retention according to the following sequence: 0 = Streaks. none.

At worst, only slight striations are visible, and only at critical angles under strong lighting conditions.

2=Slight but well distributed striations, most clearly visible under strong lighting conditions.

There are streaks all over the surface, which can be seen very easily from any angle.

4 - The final result is very streaky and generally has the appearance of smudges rather than lines.

These results are shown in Table 2. The lint phenomenon occurred in the base material of Cera) A, but this did not occur in the base materials of Cera) B and C, indicating that the presence of the outer layer is effective in preventing the lint phenomenon.

Table 2 Set A 1 1.86 o, 0361:1 No streaks, good set B 4 1.45 0.039 2 set C 21,470,0420~1 Fairly easy, good results to give a flat surface It can be seen that the performance of set C with fusion bonding is superior to the others.

Example 2 The procedure of Example 1 was repeated using the same cleaning composition and three sets of substrates D1E and F.

The first Cera) D base material is Mitsubishi (trademark) '1'C
Spunlace viscose nonwoven fabric called F (basis weight 4
0. ! i'/m'', porosity 90), which has very long fibers and is therefore less prone to lint. 815 (Mitsubishi TC with fused bonding on each side similar to Novellin US 15 in Example IK)
pO layer, and each substrate of Cera) F is made of Mitsubishi T, which has a layer of heat-sealable lightweight nonwoven called Corobin™ PPS MED melt-bonded on both sides.
It consisted of a single layer of CP. When viewed under an optical microscope, the composite substrates of set F were observed to have more flat areas on their external surfaces than those of set E.

As expected, no lint phenomenon was observed on these three sets of substrates. Nevertheless, the streak-free cleaning performance was substantially improved by the presence of the fused bond layer, and the improvement was more pronounced in set F, where a higher proportion of flats were present.

The results are shown in Table 3.

Example 6 The procedure of Example 1 was repeated using the same cleaning composition and two sets of substrates G and H.

The substrates for the first set G were made of bonded fiber fabrics made of XLA 150, respectively.
It consisted of a ring sheet (basis weight 150 g/m2, porosity 97).

Setsu) The base material of H is XLA 150! 7) This sheet was made of a sheet, which was heat and pressure treated on one side using a household iron set to "high" so that the fibers on the outer surface were virtually distinguishable as fibers. They were allowed to adhere to each other to prevent them from sticking together and to form a flat area. The ironed surface has a smooth feel and shiny appearance, and the entire sheet of XLA 150 has a substantially reduced thickness due to compression caused by the heat and pressure treatment. Was.

The results of the streakless cleaning test are shown in Table 4.

A slight lint phenomenon was observed on both sets of substrates, but not enough to interfere with the cleaning effect.

I think you can see that an improved non-scratch result was obtained.

Table 4 Set G 1 2.39 0.036 0-1 Good 2 1.76
Skin 0611 Very slight streaks 3 2
．． 47 0.033 1 Very slight scratches 4 2.00 0.026 2 Set with scratches H 1, 4,600,0480 Good, easy to use 2 4.1
2 0.064 0-114 4.50 0.
042 1 Very slight streak 5 3.1
8 2 Slight streaks 6 4.26
0.039 2 Slight streaks 7 2.82
0.034 Example with 2 to 6 scratches 4 Similar to that used in Example 2, but with a basis weight of 60
A further series of comparative tests were carried out using Mitsubishi TCP of 100 m/m''. Each test substrate was made of a layer of the same Corobin P PS MFD used in Example 2, cored by heat and pressure, using said material as the core. were laminated on only one side of the substrate to have a surface according to the invention. Each substrate was cleaned and then impregnated with the cleaning composition used in the previous example. One half was cleaned on one side of the substrate carrying the Corobin layer, and then the other half was painted/heated on the repellent side of the substrate. Repeated tests were performed with the presses reversed to eliminate any variations due to changes in fluid loading. The results of the test using the same evaluation method used for each side above are shown in Table 5. This direct comparison reveals that the streak-free cleaning effectiveness is -,%, with the Corobin surface.

[Brief explanation of the drawing]

FIG. 1 is an isometric view of a first article according to the invention;
The figure is a partial cross-sectional view taken along lines ■ to H in figure 1, and
The figures are a partial sectional view corresponding to FIG. 2 for a second article of the invention, and FIG. 4 is a partial sectional view corresponding to FIG. 2 for a sixth article of the invention. In the figure, ... article, 2 and 3 ... base material, 4 ... core, 5 and 6 - fusion bonding layer, 7 ... edge part, 8 ...
Lattice pattern, 9... compartment, 10... porous polymer,
11... Adhesive, 12... Polyethylene film, 1
3...Pinhole. Attorney: Akira Asamura Procedural Amendment (internally dated September 71, 1980, Mr. Commissioner of the Japan Patent Office 1, Indication of the case, 8th year Q”fil Application No. 147966, 2, Name of the invention: Surface cleaning tool 3, Supplement 11 - Relationship with the person f'l who makes the IFI 1 person in and out of the IFI 4 Director 5, Supplement 11 - Order II Visit Showa 6, Supplement j [The number of inventions increases due to 8, Contents of 'flli city As shown in the attached sheet (1) Specification evening, Page 10, Table 1, No. 241 to heart from the top (high loft 41 (lll), No. 4411N from the left (grammage l!)
The fO "82" is kept at "85".

Claims (1)

Claims: (1) An article comprising a sheet substrate suitable for wiping a surface, the sheet substrate carrying a liquid active substance (as defined herein); and a) Few (tomo 30)
a) a core of bulky, high-porosity fibrous sheet material having a surface area of 11/m”; and directly adjacent to said core, b) a core of thermoplastic material fused by the application of heat and pressure; an article comprising at least one outer cleaning surface having a flattened area and an open area; (2) the flattened area of the outer cleaning surface (b) is formed by applying heat and pressure; The article according to claim (1), characterized in that it consists of thermoplastic fibers that are fused to such an extent that they are virtually indistinguishable as fibers. (3) What is the bulky core material (a)? Although distinguished,
an outer surface layer (c)y+) consisting of a porous thermoplastic sheet material adjacent thereto is also derived from the outer surface layer (b) and is fused to the core material by the application of heat and pressure; q The scope of the claims (which is characterized by
Articles described in 1) or (2). (4) The outer surface layer <c> is made of a heat-sealable fibrous sheet material having a basis weight of 8 to 25 I/rn2, and the fibers on the outer surface are visually indistinguishable as fibers. , and the sheet material becomes 7′(]R(a)
Article according to claim (2) or (3), characterized in that the article is melt-bonded on. (5) The external surface layer (C) consists of a thermoplastic reticulated material having a seam of 2 to 201/m2 and a mesh size (as defined in the text) of 5 to 20 cm or less. An article according to claim (3), characterized in that (6) the core material (a) of the bulky layer (h) is low (containing thermoplastic fibers of the same size and thickness), and the outer surface layer (bl) Article according to claim (2) of the patent NFJ, characterized in that the thermoplastic fibers in the bulky core material (a) are provided by the thermoplastic fibers themselves within the bulky core material (a). Any of claims (1) to (6), characterized in that the liquid active substance is supported by a matrix in a medium for controlled release of the active substance. (8) The substrate carries a liquid active substance in a controlled release medium sandwiched between the substrate and a second substrate. Article according to any one of claims (1) to (9) characterized in that the FF-like active substance is supported within a highly porous polymer and/or microcapsules. The article according to any one of claims rl) to (8), characterized in that: , when applied to a surface and dried, dries without substantially forming discrete droplets or particles larger than 0.25 μm. 9) The article described in any one of item 9).