DE7904705U1 - AIRY, NON-WOVEN GRINDING PILLOW - Google Patents

Description

BERLIN MUNICH

Patentanwälte pp iQr ^ Wl ^ P B DAPTMCD Patentanwälte

Dr.-lng. Hans Rusehke LT. nUOOnl \ C Ot Γ / ΑΠ I INCH Dipl.-lng. Hans E. Ruschke

Dipl.-fng. Olaf Ruschke PATENT ANWÄ LT E Dlpl.-lng. JOrgen Rost

Auguste-Viktoria-Stra6Q 65 PienzenauerstraBe 2

Berlin 33 BERLIN - MÖNCHEN 8000 Munich SUN

Telephone: (0 30) 8 26 38 95 Telephone: (0 89) 98 03 24

(030 8 26 44 81 (089) 987258

Telex: 1 S3 786 (089) 98 88 00

Cable: Quadrature Berlin ^{τ | βχ:} 5 22 767 Kibal: squaring Munich

- 3 - M 4o29

Minnesota Mining and Manufacturing Company, St. Paul,
Minnesota, V. St. A.

Perforated airy non-woven sanding pad

The present invention relates to an airy nonwoven {abrasive pad. |

The Use of Airy Fibrous Abrasive Nonwoven Articles I

for surface treatment - e.g. for scrubbing pots ί

and pans - is known. These products are f

are typically airy non-woven open mats made of ν

randomly distributed crimped staple fibers, which at their ■ '

Points of intersection and contact with an abrasive f containing binders are glued together. . '

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Airy non-woven sanding pads can be used after in the DE-PS 1.239.O91 produce disclosed method.

These cushions are particularly suitable for scrubbing pots and pans and as cushions for treating floors they can be used for a relatively long time under normal conditions without becoming clogged. After use can they are easy to clean by simply rinsing them with water and drying them; they can be extended over significant periods of time hold up and then use again.

While such pillows for conventional cleaning and floor treatment processes They are very useful, they get too easily if you are particularly dirty or greasy with them Cleans objects or removes particularly strong floor wax deposits. One solution to this problem would be the abrasive product with large diameter fibers to make the porous structure more open. Such a product has however found unsuitable in some cases as this modification reduces the amount of fiber present on the surface of the product and therefore the effective surface area of the product which depends on the fiber surface for support.

The present invention provides an airy, nonwoven, open abrasive pad that is reasonably abrasive, to scrub pots and pans, to clean floor surfaces and to be used in other areas where such

Term nonwoven abrasive articles commonly used. The abrasive pad according to the present invention further comprises a hitherto unique openness, so that there is dirt, grease and / or over longer periods of use Can absorb floor wax accumulations.

The abrasive product of the present invention is an airy, low density, nonwoven abrasive pad that has been perforated to provide an additional Io% to about 60 % open area with a pattern of openings evenly spaced across its face. This openness has been found to not affect the cleaning and scrubbing performance of the abrasive article and thus offers an unexpected benefit.

The term "open area portion" is intended to denote those denote the percentage of the total area of the perforated cushion that is opened or opened according to the present invention. Will get removed. The total area is the surface within the outline of the perforated cushion.

A sanding pad in the form of a grid is preferred, which is formed by slitting and permanently stretching a continuous airy fibrous nonwoven abrasive pad, creating a pattern of equally spaced parallel rows of equally spaced openings in which again-

fetching sequences of openings in the adjacent rows are offset from one another.

The pillow of the present invention is typically rectangular or circular in shape and is of a size where you can hold it in your hand, up to one suitable for large floor treatment machines or even larger ones Format. Furthermore, the cushion can be in the form of a strip, the ends of which are connected to one another, around a sanding belt or use them as individual tabs that are placed around the circumference of a rotatable hub, around a tab wheel to train. The shape and size depends of course on the needs of the user, as he is from the intended Use of these nonwoven abrasive products results.

The invention will now be described in detail by means of embodiments with reference to the accompanying drawings will.

Figure 1 is a top plan view of a portion of an airy nonwoven Sanding pad that slit, but not yet stretched in front of;

Figure 2 is a plan view of a portion of an airy nonwoven fabric Abrasive pad that has been stretched;

Figure 3 is a perspective view of part of an airy one nonwoven abrasive pad according to the present invention;

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Figure 4 is a top plan view of a portion of another embodiment an airy, nonwoven abrasive pad in accordance with the present invention;

Figure 5 is a sectional view taken on line 5-5 of Figure 4;

Figure 6 is another top plan view of a portion of the airy nonwoven abrasive pad of the present invention Invention.

Figs. 1 shows a non-woven abrasive pad Io that has been slit into a pattern of equally spaced ^fi parallel rows of uniformly spaced and equal-length | Slots 11. The slots 11 are preferably offset from one another in adjacent rows.

4 and 5 show a further embodiment of a stretched one Pillow 4o according to the present invention, in which the adjacent rows are not in the same way are offset from one another as above, but in which there is a repeating sequence of slots, those in adjacent slots Rows are offset from one another, while slots in other rows are aligned with one another. In In such an embodiment, after stretching, the result of which is shown in FIGS. 4 and 5, cushion parts are obtained between the rows of slots aligned with each other above and below | protrude beyond the pillow plane to make the pillow three-dimensional change as shown in Fig. 5. This embodiment is in

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advantageous for cleaning purposes in some applications.

The abrasive pads of the present invention can be made by simply cutting openings in the pad, to create a pattern of evenly spaced openings. Such openings can have any shape have, i.e. for example circular, triangular, square or the like. Openings with a mean size of about 5 mm to about 100 mm have proven to be sufficient. Smaller pillows, such as those you can hold in your hand, can contain openings between about 5 mm and about 25 mm, I.

while larger pillows - e.g. openings for floor treatment may contain from about Io mm to about loo mm.

The preferred article according to the present invention arises by putting in a nonwoven abrasive pad, as above described, a pattern of slits cuts into the slotted cushion by applying opposing forces pulls apart the edges of the cushion parallel to the slots to open the slots. The stretched pillow is then fixed in order to produce a permanently open structure, as shown, for example, in FIGS. 2 and 3.

The slitting is advantageously carried out with a punch, the cutting bears in a pattern corresponding to the desired. Also other means known from the prior art

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such openings can be used to make such openings as long as they conform to the nature of the nonwoven cushion to be slit are adapted.

The slots can be made different in length, depending on the length of the grinding product openness desired of the present invention. Slot lengths between about 5 mm and about 40 mm have been found to be satisfactory exposed. The slots can be straight, curved or guided differently - for example as flat Angle. The pad of the present invention may include slits of a variety of lengths so long as they are uniform Patterns are arranged. The separation between the slots also depends on what is desired for the pillow Proportion of open area. The range of slot row spacings that has been found to be satisfactory is from about 5 mm to about 25 mm.

The stretched nonwoven abrasive pad can advantageously be set in place by placing a suitable one before or after stretching applying curable stiffenable liquid adhesive material to the pad and allowing the adhesive to cure to form a solid Manufacture product. Surprisingly, it has been found that conventional, commercially available nonwoven web material the stretched structure is retained if it is only treated briefly with heat in the range from 90 ° C to 175 ° C =

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The nonwoven abrasive products that are used as the raw material

for the production of the sanding pads according to the present egg

Finding can be used, are currently commercially available and known.

On the perforated nonwoven abrasive pads of the present invention Invention, certain changes can be made. For example, one can use those according to the present invention perforated non-woven abrasive pads produced on top of other layers - for example foam layers - in order to manufacture new cleaning products. For example, one can do the stretched nonwoven abrasive material conventionally on a foam made of regenerated cellulose, polyurethane or another polymer plastic. Furthermore, one can use a non-perforated non-woven laminate Abrasive material and foam according to the present invention provided with openings to form a perforated layer structure. Such items have proven to be extremely useful for cleaning work in kitchens.

Nonwoven abrasive pads of the present invention can be further modified by adding cleaning aids such as surfactants or detergents or finishing materials such as oils, waxes and the like in she picks up. Such substances can be included in a suitable compatible binder, from which they become when used

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dissolve, or can be encapsulated in capsules, from which they emerge in a controlled manner during use.

Furthermore, parts of the stretched nonwoven fabric made in accordance with the present invention can be converted into others Take orders to make novel articles. For example, one can use a variety according to the present invention produced dumbbell-shaped perforated or stretched pillow - see. Fig. 6 - stacked and with a suitable Connect fastening device to one another at their constriction points to form a new ball-shaped abrasive article. The fastening device can, for example, have a handle, so that the article can be used for bottles, furnishings in bathrooms or the like. Used for this purpose one expediently about 5 to about 15 such dumbbell-shaped parts with a thickness of about 5 mm to about Io mm.

The invention will now be explained further with the following examples, in which all parts are parts by weight unless otherwise stated.

Comparative Example A and Examples 1-5

Comparative Example A and Examples 1-5 were made from a 25 mm thick airy nonwoven abrasive product (floor sanding pad) manufactured. Each sample was doing too

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a grinding wheel with a diameter of 43o mm to put on tailored to a floor polishing machine. Comparative Example A was a continuous sheet of the airy one nonwoven abrasive product. The samples of Examples 1-5 were made by taking equally spaced molds from a 43o mm diameter pads of abrasive nonwoven product were removed. The respective configuration in the different examples was as follows:

example 1

This pillow had a central opening 86 mm in diameter and was divided into four groups of diamond-shaped openings perforated in each quadrant of the disc. Each group consisted of twenty equally spaced diamond-shaped openings with side lengths of 25 χ 12.5 mm. In each case five aligned diamond-shaped openings lay at a distance of about Io mm on the four equally spaced radii in each quadrant, with the minor axis of the opening diamond aligned with the radius was. The pillow had an open portion of about 20%.

Example 2

This pillow had a central opening that was 86 mm in diameter and was perforated with 68 circular openings 29 mm in diameter at approximately equal intervals; their distance from the circumference of the pillow however, was nowhere less than 25 mm. The open area of the pillow was 31%.

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Example 3

This pad had a central opening with a diameter of 86 mm and was provided with 14 round openings, each 76 mm in diameter, approximately equally spaced and at a distance of at least 25 mm from the edge of the pane. The resulting pillow had an open portion of about 48 %.

Example 4

This pad had a central opening of 86 mm in diameter and was perforated into 21 round openings of 29 mm and 15 round openings of 76 mm diameter, the openings being approximately equally spaced with the larger openings on the smaller area in an even mixture and no opening closer than 25 mm from the edge of the pane. The resulting pillow has an open portion of about 61 %.

Example 5

This pillow had a central opening of 86 mm and was perforated with 15 round openings with 12.5 mm diameter, 18 round openings with 29 mm and 16 round openings each 76 mm in diameter, which were arranged approximately equally spaced in a uniform mixture so that no opening was closer than 12.5 mm to the circumference. The resulting pad had an open area of about 64 %.

Each of the perforated disks of Examples 1-5 described above and the continuous one described as Comparative Sample A. Discs were tested for their suitability as cleaning and polishing floor pillows. A gloss test was carried out, a service life test, a test for deformation when the machine tilts and a durability test were carried out.

The specimen was used for the gloss test with a commercially available fastening device attached to a floor treatment machine and the machine with each sample for about two minutes run on vinyl asbestos floor tiles; meanwhile, a commercially available cleaning and polishing spray was used applied to the ground. The floor gloss was then determined with a 60 Gardner gloss meter. A commercially usable one Pillow gives a gloss value of more than 65.

For the service life test, each sample ran on the machine for about 10 minutes, to determine whether the sample performed satisfactorily or failed. If a sample remained usable for at least 10 minutes, had it passed this test.

In the tension test with the machine tilted, the test cushion was used with the machine described above, the plane of the Working surface of the machine, however, at an angle of 15 2o to the floor with the disc rotating, takes about 2 to 4 seconds held. Pillows that do not dissolve or take off from the skin

- 15 loosen the drive arrangement, you have passed this test.

The durability test was carried out with the machine explained above the sample rotated on a friction surface glued to the floor. These are 14o χ 14o mm large piece of a commercially available friction lining. The sample ran with a swell time of 3/4 seconds in each overflow guided ten times over the friction surface. Samples that pass this test did not dissolve after Io overflows.

Table I shows the results of these tests.

Table I.

Gloss value stand-tilt test durability time

E.g.
No. % Open minded
surfaces
portion A. O 1 2o 2 31 3 48 4th 61 5 64

72 7o 7o 7o 66 63

best,

best.

best.

n.best.

1)

n. best.

j 1) Sample came off the holder. 2) sample dissolved.

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As shown in the table, the values of the perforated cushions are equivalent up to an open area of about 60% , at 64% they no longer work properly.

Example 6

A hand cushion was produced by using a commercially available non-woven sanding pad with the dimensions 23ο χ 15ο χ 6 mm with 25 mm long slots at a mutual distance of 6 mm in the rows and a row distance of 6 mm (see Fig. 1) was slotted; the slotted material was then stuck onto a piece of corrugated cardboard and squared to the direction of the slot starting from the original width of 150 mm or length of 23o mm to a greater width of 28o mm and a shorter length of about 13o - 15o mm stretched. The material so determined was then about 5 min. held in a compressed air oven heated to llo ° C, taken out and still pinned to the cardboard and cooled. After cooling, the material was removed; it had then a shape similar to that shown in FIG. 2 with an open area portion of 3o%.

Example 7

The nonwoven starting material described in the previous example was made with 32 mm long slots with a slot spacing of 13 mm and a row spacing of 13 mm slotted to the slot pattern shown in FIG. The GE

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slit material was then stretched and heat set, as explained in the previous example; a stretched, non-woven abrasive pad such as that shown in FIG FIGS. 4 and 5 show with an open area proportion of 30%.

Example 8

A pot and pan scouring pillow was made from 12 dumbbell-shaped Elements composed of stretched abrasive nonwoven product (see Fig. 6). The stretched one The abrasive product was made by cutting parallel rows of 25 mm long slots at a distance of 5 mm and with a row spacing of 6 mm has been made, with the slots in adjacent rows against one another were offset. Upon stretching, the slots opened into stretched hexagonal openings as shown in FIG. The fixation was carried out by heating in an air oven at 16 ° C. for 5 minutes and cooling in the stretched state. About Segments 83 mm long and 38 mm wide (see Figure 6) were cut from the stretched material. About 12 Segments were put together and tied together in the necked middle with a plastic strip so that a spherical bundle with a diameter of about 76 mm resulted.

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Claims (6)

O ft berlin Dk: RUSGHKE & 'PARTNER: .. · Munich EnpSTiw *. PATENTANWÄLTE SÄjywb DIpK-PnB. Olaf Ruechte Dlpl.-Ing, Jürgen Rost Augu.teÄ-Strasse 65 BERLIN - M 0 NCHEN ÄÄf "Berlin 83 ä" 00 Munich Telephone = | g30) β253895 Berlin, April 27, 1979 TeWÖn'Sliis Τ · '· «1Μ ™ TI ,: 5 227 * 7 ^ cable: Ou.dratur Berlin Kib # |. q ,,,,,,,,,,, MBncll, n Minnesota Mining and Manufacturing Company - M 4029 - claims for protection 1. Airy, non-woven, low-density abrasive pad made from a web of crimped fibers bonded together with an adhesive containing abrasive grains, characterized by a pattern of evenly spaced openings running through it, which create an additional open area of about 10 % to about 60 % . 2. The sanding pad of claim 1 further characterized in that the opening pattern is a pattern of equally spaced parallel rows of equally spaced openings, the openings in adjacent rows being offset from one another in a repeating sequence. 3. Sanding pad according to claim 2, characterized in that the openings in adjacent rows are offset from one another throughout the cushion. 4. Sanding pad after. Claim 1, characterized in that the cushion is laminated onto a layer of sponge material. 5. Sanding pad according to claim], characterized in that it is in the form of a disc which is suitable for attachment to a rotating floor treatment machine. 6. Sanding pad according to claim 1, characterized by a pattern of equally spaced parallel rows of evenly spaced slots, the slots in adjacent rows being offset from one another in a repeating sequence, OR / Kn.