JPS5930419B2 - cleaning cloth - Google Patents

Description

[Detailed description of the invention] FIELD OF THE INVENTION The present invention relates to cleaning fabrics.

The surfaces of various products such as eyeglass lenses, cameras and other optical devices, mirrors and window glasses, polished or plated metal products, painted products, high-quality furniture, lacquerware, tableware, glassware, etc. should be clean. Conditions are desirable, and cleaning cloths and soft papers are used to keep them fruitful.

Many of these cleaning cloths and papers are made of fibers derived from natural products such as cellulose.

Natural products such as cellulose have considerable cleaning power, but are inferior in strength and durability.

For example, it is common for fiber fragments to fall off the fabric during cleaning, creating dust.

On the other hand, synthetic fibers are superior in terms of strength and durability, but
It has poor cleaning power and is rarely used in practice.

An object of the present invention is to provide a new cleaning fabric that can be easily manufactured from man-made fibers and has excellent cleaning power.

That is, in the fabric of the present invention, 25% or more of the fibers forming the surface that comes into contact with the object to be cleaned has a density of 5000 cr/g. At least one having a surface area of L or more and selected from a polygon or a similar shape, a flat shape with an aspect ratio of 2.5 or more, and a combination of flat parts with an aspect ratio of 2.5 or more.
It is characterized by being made of artificial fibers with a body surface area having a cross-sectional shape of 100%.

The present inventors have been engaged in research on synthetic fibers for many years, but
It was discovered by chance that fibers with a cross-sectional shape of a specific shape had extremely superior cleaning power, and as a result of investigating the phenomenon in detail, the cleaning power for cleaning the surfaces of glass products, etc. was determined by the unit type Ha of the fibers. They have found that they are particularly good when they have a large surface area and a flat or polygonal cross section, and have completed the present invention.

For example, in the case of polyamide, polyester, polyacrylic fibers, etc., which are commonly used, and have a circular cross section with a fineness of 1 to 10 d, the surface area is 1000 to 3000 cr per 1 g.
1. The cleaning power is extremely poor.

However, even if the same material polymer is used, for example, the fineness is 0.
．． A flat thread with a 5d1 flatness ratio of 25 has a surface area of about 12,000i per 1.9M, and its cleaning power is 5 to 2 times higher than that of the above-mentioned ordinary thread.
This is an excellent result of 0 times.

The cleaning power here refers to the ability to remove dirt, fog, etc. from the surface of the glass product, etc.

For example, when the surface of a mirror that has been soiled with fingerprints or the like is gently wiped with a piece of cloth, the cleaning power increases as the number of times it is wiped is reduced to make it look more beautiful.

To erase fingerprints on a mirror, use a tissue paper (soft thin paper) for 20 to 30 minutes to remove fingerprints by pressing lightly with your hand and wiping.
It takes several times.

20 to 30 times with cotton cloth (raised product), 1 to 10 times with regular single yarn
50 to 1 for synthetic fiber fabric (raised product) with a circular cross section of 5d
It takes 00 times.

In contrast, with the product of the present invention, fingerprints and the like can be wiped off with just a few wipes, often 10 times or less.

According to the findings of the present inventors, the larger the surface area of the fibers 19 (hereinafter simply referred to as surface area), the greater the cleaning power.

In order to achieve the object of the present invention, the surface area of the artificial fiber must be 5,000 CrfL/E1 or more, preferably 7,000 ffl/g or more, and more preferably 10
．． 000crlt/9 or more, most preferably 15,0
The range is 00crit/9 or more.

One way to increase surface area is to make the filaments thinner.

For example, the surface area of a fiber with a circular cross section and a density of 1.2 and a fineness of 1 d is approximately 3,000 CI? L/g, and the cleaning power is poor.

For the same <0.3d, the surface area is approximately 5,500 cr'
tl & has a certain degree of cleaning power, and in the case of 0.1 d, the surface area is about 9600 art/g and the cleaning power is quite excellent.

However, reducing the fineness too much is not preferable from the viewpoint of manufacturing technology and the strength and durability of the product.

Furthermore, the problem arises that the fibers break and become dust themselves.

From the viewpoint of manufacturing technology, it is preferably 0.001 d or more, particularly 0.01 d or more.

From the viewpoint of durability and strength, it is preferably 0.01 d or more, particularly 0.1 d or more.

Therefore, for a circular cross section, the practical main surface area is 10,000 cTL.
There is a problem in terms of strength in making it 19 or higher.

Another way to increase the surface area is to make the cross section of the fibers non-circular, especially flat.

If the oblateness is increased, the surface area can be increased without reducing the fineness too much, which is preferable from the viewpoint of durability and strength.

For example, in the case of a fiber having a rectangular cross section with a long side to short side ratio of 10 (oblateness 10), the surface area is approximately 6 at a fineness of 1 d.
0006r? L/g, 0.1d is 19000c1? L/
9, and has approximately twice the surface area of a thread with a circular cross section of the same fineness.

Generally, when the fineness is the same, the larger the oblateness, the larger the surface area and the greater the cleaning power.

According to the findings of the present inventors, flat threads have a larger cleaning power than expected due to their large surface area compared to circular or nearly circular fibers (having an oblateness close to 1).

The reason for this is not well understood, but it is probably because the contact area with the surface to be cleaned becomes large and the adhesion is good.

This good adhesion is also reflected in the fact that when you wipe it with your hand, you feel a large frictional force.

Similarly, artificial fibers having a body surface area having a polygonal shape such as a triangular or quadrangular shape or a cross section similar to these polygonal shapes have excellent adhesion and are suitable for the present invention.

Of course, if the purpose is simply to increase cleaning power or adhesion, it can be achieved by making the fineness sufficiently small even with circular or similar fibers with an oblateness close to 1, but comparison of fineness with a large oblateness It is more preferable to use a flat yarn with a larger target in terms of durability.

In this sense, the larger the aspect ratio, the better.

In fact, the effect is quite obvious when the aspect ratio is 2.5 or more, and the effect is remarkable when the aspect ratio is 5 or more, especially 7°5 or more.

Of course, the aspect ratio cannot be increased infinitely.

40 to 60 is considered to be the practical limit.

Here, the oblateness is the ratio (b/
d).

For a rectangle, it is the ratio of the long side to the short side.

An example of determining the length and thickness of an irregular shape is shown in FIG.

Similar to squamous threads, it has a combination of flat parts (flattenedness of 2.5 or more), a shape with flat branches, such as an H-shape,
It is also preferable that the cross section has a radial shape or the like.

Polygonal shapes such as triangles and quadrilaterals, shapes similar to them, and irregular shapes are also useful, and among them, flat shapes are preferable for the above-mentioned reasons.

The fabric of the present invention uses the above-mentioned wide/shallow area artificial fibers for the fibers forming the contact surface.

In general, wide and shallow area artificial fibers are extremely flexible and are therefore suitable for cleaning glass.

However, if it is too soft and difficult to handle, or if it is necessary to reinforce it with other ordinary fibers in terms of durability, a mixture of wide and shallow area artificial fibers and ordinary fibers may be used.

However, the object of the present invention cannot be achieved unless 25% by weight or more of the fibers on the contact surface are artificial fibers with wide and shallow areas.

However, it is more preferable that the wide/shallow area artificial fibers account for 50% by weight or more of the fibers forming the contact surface.

The cleaning fabric can have various structures such as stable, spun yarn, woven fabric using continuous filament, knitted fabric, non-woven fabric, loop pile product, cut pile product, and raised product.

Particularly suitable are those with piles or naps.

Portions that do not come into contact with the object to be cleaned, such as the ground texture and the back surface, may be made of ordinary fibers.

Further, a resin may be attached to fix the fiber structure or provide elasticity.

Further, a surfactant, oil, or softener may be attached to enhance the cleaning effect.

In order to prevent fiber pieces cut from the cleaning fabric from falling off, loop pile products are preferable to cut pile products, and continuous filament products are preferable to short fiber products.

It is also preferable to fix the tissue using elastic resins in the same laboratory.

. The fabric of the present invention can have the above-described structure using a wide shallow area artificial fiber.

On the other hand, the above-mentioned structure is manufactured using a composite fiber in which one or more components are bonded to form a plurality of segments within a single fiber, and then the composite fiber is processed by chemical and/or physical methods. It can also be divided into fibrils and made into wide and shallow area artificial fibers.

This composite fiber splitting method is an excellent method with extremely high practicality because it allows products with a large surface area to be easily obtained.

Split fibrillation of composite fibers involves dissolving or decomposing one component with a solvent or decomposing agent, swelling and shrinking with a swelling agent,
Methods such as deformation and contraction by heating, friction and impact by external force, etc. can be used.

FIGS. 2 to 7 are examples of cross sections of composite fibers that can be used for the above purpose.

2 and 7 show a composite of component 1 and component 2 in parallel layers, and if this is divided into component 1 and component 2, flat thin fibers can be obtained.

Figure 3 shows an example in which two components are combined into many fan-shaped segments, Figure 4 shows an example in which two components are combined into radial and fan-shaped segments, and Figure 5 shows one component. FIG. 6 shows an example of an archipelagic complex in which one component is irregularly dispersed among other components.

Any other composite form can be used in the present invention as long as it can be divided into segments.

However, from the viewpoint that extremely flat fibers can be obtained, composite fibers having cross sections as shown in FIGS. 2 and 7 are suitable for the present invention.

In addition to the above, examples of so-called multilayer fibers in which a plurality of components are composited in layers that can be used in the present invention include equity 47-14052 and 47-4088 proposed by the present inventors.
8, 47-456σ7, 47-49766, 48
There are multilayer fibers such as -16449 and 46-8938, and the method for spinning multilayer fibers was proposed by the present inventors in Japanese Patent Publications No. 47-15526, No. 47-15528, No. 4
4-22764, 46-23564, 47-155
30, 47-15533, 49-29129, etc.

Of course, any method other than these can be used as long as it can produce splittable conjugate fibers.

All known spinning materials can be used for the wide/shallow area artificial fiber according to the present invention.

Specifically, spinning materials such as polyamide, polyolefin, polyvinyl, polyacrylonitrile, polyester, polyether, and cellulose can be used, and melt, wet, and dry spinning methods can be used.

Body surface area artificial fibers made of lipophilic polymers whose main components are lipophilic groups such as methylene groups, alkylene groups, alicyclic groups, and aromatic ring groups are effective in removing stains caused by fingerprints, finger marks, and oils and fats. .

In addition, body surface area artificial fibers made of hydrophilic polymers containing large amounts of hydrophilic groups such as amino groups, carboxyl groups, amide groups, sulfone groups, hydroxyl groups, and ether bonds can remove sugars, starches, other water-soluble substances, and water droplets. It is effective for

In particular, body surface area artificial fibers made of both lipophilic polymers and hydrophilic polymers are preferred because they can effectively remove both oil-based and water-based stains.

Such a body surface area artificial fiber can be easily obtained by dividing a composite fiber made of a lipophilic polymer and a hydrophilic polymer.

A hydrophilic polymer means, for example, that when made into a fiber (1 denier circular cross section), the equilibrium moisture content at 25°065%RH is 3.
% or more, particularly 5% or more, such as various polyamides, polyvinyl alcohols, polyethers, cellulose-based materials, etc.

Affinity polymers have an equilibrium moisture content of less than 3%, especially 2%.
For example, many polyolefins, polyesters, etc.

Polyvinyl-based and polyacrylonitrile-based polymers become hydrophilic if they are copolymerized with monomers having hydrophilic groups, but polyacrylonitrile homopolymers, for example, are lipophilic.

The cleaning fabric product of the present invention can be used for cleaning glasses, cleaning lenses, etc.
Glass cleaning, furniture cleaning, piano key board cleaning, painted surface cleaning supplies, car window glass and car body cleaning supplies, metal surfaces,
Includes cleaning supplies for ceramics, (tableware, artwork) floors, wood, etc.

EXAMPLES The present invention will be specifically explained below with reference to Examples.

In the examples, "%" means "%" unless otherwise specified.
% by weight.

Example 1 A composite filament of 260 denier/96 filament having a cross-sectional pattern shown in FIG. 7 was melt spun.

Segment 1 in Figure 7 is polyethylene terephthalate (hereinafter abbreviated as "Pet") whose intrinsic viscosity is 0.69 in a 300C orthochlorophenol solution, and segment 2 is polyethylene terephthalate (hereinafter abbreviated as "Pet") with a 30°C sulfuric acid solution having a relative viscosity of 2.73 (hereinafter "Nylon").
), and for both Pet and N, the average oblateness of the unit segment cross section is about 10, and the average fineness is 0.0.
I got one of 8 denier.

This fiber has a calculated body surface area of 20000 cvt/El.

This fiber F1 is used as a pile, and the base thread and removed thread are cotton threads of 208
A pile fabric with a towel structure was created using the /1.

At this time, in terms of yarn amount, the pile part is 68%, the ground yarn part is 12%,
The fabric was designed to occupy 20% of the removed threads.

Also, for comparison, the pile part is made of cotton thread 2 instead of F1 length.
08/1 or nylon 260 denier/96 filament round cross section yarn was used in combination, and the cotton yarn and nylon filament were used alone.

The woven width was adjusted to 38 crIL, and the basis weight was adjusted to 330 g/i.

After weaving, the F1 products were dipped in benzyl alcohol emulsion, squeezed, washed and dried.

Samples that did not use Fl were subjected to a scouring, water washing and drying process.

The above sample was kept in a constant temperature chamber at 25°C and 65% for 48 hours.
After being stored for more than 30 minutes, the samples were cut, and the cleaning power was evaluated, and the results are listed in Table 1.

Example 2 Nylon 6 and polyester fibers and composite fibers of nylon 6 and polyester having the fineness configuration shown in Table 2 were spun.

The extracted fibers in Table 2 had the cross-sectional pattern shown in FIG. 7, and the fineness and surface area were expressed for each segment of the divided layer in the same manner as in Example 1.

Each fiber shown in Table 2 can be used alone or in combination to create various tube knits (
After adjusting the fabric weight to 200 g/m) and mixing finely refined composite yarns, they were treated with benzyl alcohol emulsion and dried, and then kept at a constant temperature and humidity of 25°G and 65%.

These were cut as samples, and the cleaning power was evaluated in the same manner as in Example 1.

FIG. 8 summarizes the results and illustrates the relationship between fiber surface area and cleaning power.

As is clear from Figure 8, the surface area is 5000c.
The practical effect becomes very clear at rj,/El, and 10
000cI? L/g, it has a cleaning power that is not required with conventional fabrics.

Moreover, when it reached 18,000 crit/9 or more, a surprising effect was exhibited in that the specular luster was restored by lightly stroking the length once or twice.

In addition, the surface area is larger when using yarn with a higher tendency to flatten, but during the cleaning test, I felt that there was a moderate degree of adhesion between the cloth and the object to be cleaned (because there was less slippage), and the surface area was smaller. It was easy to repeat.

Example 3 Single yarn fineness of 2.0°1.0 by mixed fiber or compound spinning
Fibers having a blend ratio of 0.5 denier polyester and 6-nylon of 1:1 were prepared by varying the flatness.

The section of this fiber, the oblateness and the calculated surface area are
Shown in the table.

The yarn shown in Table 3 was used as a 100d yarn, and the basis weight was 170.
9/crl! The cleaning power after scouring and drying was evaluated using a plain woven fabric of , and the results shown in FIG. 9 were obtained.

From FIG. 9, it can be seen that the cleaning power is considerable when the aspect ratio is 5 or more.

When the cleaning power was evaluated by brushing the woven fabric with sandpaper, the level of cleaning power was generally slightly improved (about 20%).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram illustrating a method for determining length b and thickness d when determining the oblateness of a wide shallow area artificial fiber according to the present invention. FIGS. 2 to 7 are cross-sectional views of composite fibers suitable for obtaining the wide-shallow area artificial fiber according to the present invention. FIG. 8 is a diagram showing the relationship between fiber surface area and cleaning turtle. Further, FIG. 9 is a diagram showing the relationship between fiber oblateness and cleaning power.

Claims (1)

[Claims] 1. 25% by weight of the fibers forming the surface that comes into contact with the object to be cleaned
Is that more than 5000 cr per 1g? has a surface area of i or more,
and a body having at least one cross-sectional shape selected from a polygon or a similar shape, a flat shape with an oblateness of 2.5 or more, and a combination of flat parts with an oblateness of 2.5 or more. A cleaning cloth characterized by being made of surface area artificial fiber. 2. Body Surface Area The fabric according to claim 1, wherein the artificial fiber has a surface area of 700 ocvt or more per gram. 3. The fabric according to claim 2, wherein the fabric has a surface area of 10,000 ff1 or more per 1 g of large surface area artificial fiber. 4. Body surface area The fabric according to any one of claims 1 to 3, wherein the artificial fiber has an irregular cross section. 5. The fabric according to any one of claims 1 to 4, wherein the artificial fiber has a flat cross section with an oblateness of 5 or more. 6. The fabric according to claim 5, wherein the artificial fiber has a flat cross section with an oblateness of 7.5 or more. 7. The fabric according to any one of claims 1 to 6, wherein the body surface area artificial fiber has a fineness of 0.01 d or more. 8. The fabric according to any one of claims 1 to 7, wherein the artificial fibers are made of a lipophilic polymer and/or a hydrophilic polymer. 9 Body Surface Area Claims 1 to 8 in which the artificial fiber is derived from a composite fiber in which one or more components are bonded to a single fiber to form a plurality of segments. fabric. 10. The fabric according to claim 9, wherein the composite fiber is a multilayer fiber in which a plurality of components are composited in layers. 11. Claim 1 in which 50% by weight or more of the fibers forming the surface that comes into contact with the object to be cleaned is made of artificial fibers
The fabric according to any one of items 1 to 10.