JPH0919979A - Composite sheet and toilet seat cover using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a semi-disposable toilet seat cover with high strength and good texture by incorporating carboxymethyl cellulose in which antibacterial substances are fixed into a paper sheet or by using a nonwoven fabric which is obtained by spinning a resin into which the antibacterial substances are kneaded. SOLUTION: After a paper sheet being laminated on the surface of a nonwoven fabric 9, a high pressure water column flow is passed from the surface of the sheet toward the nonwoven fabric 9 side to obtain a composite sheet 4. A toilet seat cover is formed from the composite sheet 4. Antibacterial substances are incorporated into the sheet 4 and/or the nonwoven fabric. For example, various kinds of antibacterial substances are fixed in carboxymethyl cellulose(CMC), and the mixture is added into the paper sheet. In CMC metal salt, CMC acid is impregnated with the aqueous solution of heavy metal salt such as silver nitrate, copper (II) chloride, and zinc sulfide so that ion exchange can be done in the aqueous solution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial composite sheet and a toilet seat cover using the same.

[0002]

2. Description of the Related Art The following two types of toilet seat covers for Western style toilets are known. Stretchable fabric, for example, a tubular cover made of cloth formed by pile knitting or fleece knitting, which is mainly for general households and is of a type that can be washed and used for a long time (Japanese Utility Model Publication No. 51-83152). Full-disposable type mainly for public facilities, such as the full-scale type 51-87942, the full-scale number 51-111752, and the full-scale number 53-1803). It is the one (Actual public Sho 62
-25199, Showa 58-121299, Showa 58-131798, Showa
58-164600).

Generally, at home, the type is used for a long period of time, but in consideration of hygiene, it must be used for a certain period and repeatedly washed when it becomes dirty. Of course, it is necessary to wash the foot mat and the lid cover of the toilet bowl, but washing the toilet seat cover that comes into direct contact with the skin is frequent and complicated. On the contrary, the type that is discarded after each use is also complicated to replace and is generally not used at home. Thus, both types had drawbacks.

Examples of sheet materials provided with antibacterial properties for hygienic use include various sanitary materials, packaging materials, clothing, etc. (JP-A-4-11076, JP-A-4-69235, JP-A-4-69235).
4-152870, JP-A-4-138165, JP-A-4-174632, JP-A-189352, JP-A-4-194079, JP-A-4-240452,
JP-A-300302, JP-A-4-308528, and JP-A-4-352964
JP-A-4-361601, JP-A-5-154969, JP-A-5-49
682, Japanese Patent Laid-Open No. 5-57002), and various antibacterial substances such as organic substances such as quaternary ammonium and alcohol, inorganic substances such as silver and copper, and natural substances such as chitosan and allyl mustard oil. It has been known.

For example, a film containing zeolite having antibacterial ions fixed by ion exchange (Japanese Patent Laid-Open No. 6-1889).
No. 9), and a filter for an air conditioner made of a non-woven fabric made of synthetic fiber in which an antibacterial agent is kneaded is known (Japanese Patent Laid-Open No. 62-247816). Further, a toilet mat having an antibacterial property (Japanese Patent Laid-Open No. 4-282115) is known as an example of toilet articles. A bivalent copper salt compound is absorbed in a non-woven sheet such as wood pulp or rayon, and exhibits a bactericidal effect against scattered urine and washing water. However, when this material is used for a toilet seat cover, since the antibacterial agent is water-soluble, the antibacterial agent may melt and adhere to the skin, which is a safety problem.

[0006]

The present invention solves the above problems and provides a semi-dispersible type antibacterial composite sheet which can be used hygienically without having to discard each time. This antibacterial composite sheet is a composite sheet of a paper sheet and a non-woven fabric, has excellent touch and durability, and is suitable as a base material for toilet seat covers and the like.

The toilet seat cover can be used hygienically without being discarded after each use, and is 1-2 in terms of durability and antibacterial property.
Although it is possible to wash and reuse it about once, it is suitable for use for the purpose of discarding after multiple uses without washing. The present invention provides a semi-disposable toilet seat cover that can be used hygienically without performing complicated work.

[0008]

The present invention includes the following aspects. [1] A composite sheet in which a paper sheet and a non-woven fabric are integrated by a high-pressure water column flow, and at least the paper sheet contains carboxymethyl cellulose on which an anti-microbial substance is immobilized, or the non-woven fabric is kneaded and spun with an anti-microbial substance into a resin. An antibacterial composite sheet obtained by using the nonwoven fabric obtained as described above.

[2] A toilet seat cover obtained from a composite sheet in which a paper sheet and a non-woven fabric are integrated by a high-pressure water column flow,
An antibacterial composite sheet obtained by containing at least the carboxymethyl cellulose having an antibacterial substance immobilized on the paper sheet, or by using a nonwoven fabric obtained by kneading and spinning an antibacterial substance into a resin as the nonwoven fabric. A toilet seat cover.

[3] The antibacterial composite sheet according to [1], wherein the carboxymethyl cellulose on which the antibacterial substance is immobilized is at least one selected from carboxymethylcellulose benzalkonium salt and carboxymethylcellulose silver salt. [4] The antibacterial composite sheet according to [1], wherein the carboxymethylcellulose having the antibacterial substance immobilized thereon is a carboxymethylcellulose benzalkonium salt.

[5] Carboxymethyl cellulose having an antibacterial substance immobilized thereon is a water-insoluble antibacterial fiber [1]
The antibacterial composite sheet described.

[6] The antibacterial composite sheet according to [1], wherein the nonwoven fabric is a long fiber nonwoven fabric.

[7] The antibacterial composite sheet is [3],
The toilet seat cover according to [2], which is the antibacterial composite sheet according to [4], [5], or [6].

[0014]

In the present invention, an antibacterial substance is contained in one or both of the paper sheet and the non-woven fabric. It is preferable that the antibacterial substance is not eluted with water. First,
A mode in which a paper sheet contains carboxymethyl cellulose (hereinafter abbreviated as CMC) to which various antibacterial substances are fixed will be described.

CMC is an anionic polymer mainly composed of cellulose. The basic manufacturing method is pulp (cellulose)
It is obtained by reacting caustic soda with alkali cellulose and reacting it with monochloroacetic acid (ether reaction). Generally, widely marketed CMC is a sodium salt having an etherification degree of about 0.5 to 1.5 and is often water-soluble, but an insoluble CMC acid into which a carboxymethyl group itself is introduced is also known.

Since CMC is a polyelectrolyte, its aqueous solution is easily affected by salts. By utilizing this ion exchange ability, it is also possible to use it for a filter or the like for the purpose of collecting and removing a certain kind of metal. Due to these properties, sodium can be replaced by other cations to form various salts of CMC.

That is, it is possible to prepare salts of organic antibacterial substances such as benzalkonium and chlorhexidine, and inorganic antibacterial substances such as silver, copper, zinc and other heavy metals.
For example, a CMC metal salt can be ion-exchanged in an aqueous solution by impregnating CMC acid with an aqueous solution of a heavy metal such as silver nitrate, cupric chloride or zinc sulfate. Of course, the antibacterial component of the antibacterial CMC in the present invention is not limited to quaternary ammonium and heavy metals, and any cationic antibacterial substance that can be fixed to CMC can be used.

The antibacterial CMC thus obtained is mixed with a normal non-antibacterial cellulose pulp and paper-made in a wet paper machine to obtain a paper sheet having antibacterial properties.

The raw material CMC is fibrous CM.
C acid (H ⁺ —CMC ⁻ ) is preferable because it is excellent in water insolubility. Since it is fibrous, an antibacterial paper sheet can be easily obtained by mixing with other pulp, and the antibacterial component does not melt out, which is preferable in terms of safety.

The mixing ratio is not particularly limited, but pulp 10
0 to 10 parts by weight of CMC fixed with an antibacterial substance
Add about 1 part by weight. Typical non-antibacterial cellulose pulps include chemical pulps such as sulfite pulp (SP), alkali pulp (AP), and kraft pulp (KP) obtained from hardwood and softwood, semi-chemical pulp, semi-mechanical pulp, mechanical pulp, etc. Also, waste paper pulp, which is a secondary fiber that has been deinked, can be used.

The pulp can be used without distinction between unbleached pulp and bleached pulp and beating or unbeaten, but rather, a pulp close to unbeaten is preferred.
Further, as the paper sheet of the present invention, recycled fibers such as rayon, cellulose derivative fibers and hydrophilic synthetic polymer fibers such as polyvinyl alcohol and polyacrylamide can be used as long as they are hydrophilic fibers. From the viewpoint, softwood bleached kraft pulp (NBKP) is most suitable.

The basis weight (JIS P8124) of the paper sheet is not particularly limited, but is preferably about 10 to 100 g / m ² . When the basis weight is small, the absolute amount of pulp fibers is small, and it becomes difficult to give sufficient water absorption and water retention to the obtained toilet seat cover or the like.
On the other hand, if the paper sheet has a large basis weight, it is too thick to be easily molded into a toilet seat cover, and when gathers are provided, the gathers are difficult to slip and may be bulky and difficult to store.

The non-woven fabric is a web formed by forming fibers into a sheet (also called a mat or fleece), and the fibers in the web are bonded or entangled to form a cloth.
The web is mainly formed of short fibers or long fibers (continuous fibers also called filaments). As a method using long fibers, a method is known in which filaments drawn by a fluid while spinning are accumulated on a screen conveyor or a perforated drum to form a web.

Although the method for producing the nonwoven fabric in the present invention is not particularly limited, the long fiber nonwoven fabric is more excellent in tensile strength and morphological stability than the short fiber nonwoven fabric and is suitable for high pressure water column flow treatment. Further, in the case of long fibers, even if a high pressure water column flow is applied, it is difficult for the long fibers to flow out together with the water column flow. In the present invention, a spunbonded nonwoven fabric which is excellent in tensile strength and morphological stability, has appropriate softness, and is advantageous in terms of cost is particularly preferable. The meltblown nonwoven fabric is made of microfibers having a fiber diameter of about 1 to 4 μm, and is soft and has a good texture.

However, the short fiber non-woven fabric is excellent in softness.

As the fibers constituting the nonwoven fabric used in the present invention, any fibers can be used as long as the fibers are softened or dissolved by heating. By this softening or melting, the surface of the fiber becomes tacky and the fibers are self-bonded to each other to form a spot-bonded area. Specific examples of fibers that can be used include fibers formed of polyamide resin such as nylon, fibers formed of polyacrylic ester resin, fibers formed of polyolefin resin such as polypropylene and polyethylene, and polyethylene. A fiber formed of a polyester resin such as terephthalate may be used.

In the case of long fibers, it is preferably 1 to 4 denier, and most preferably 1.5 to 3 denier. If the fineness of the long fibers exceeds 4 denier, the bending rigidity of the long fibers becomes too high, and the flexibility tends to decrease. On the contrary, when the fineness of the long fibers is less than 1 denier, the production conditions become strict, and it becomes difficult to produce the long fibers at a high speed, which is not realistic.

The basis weight of the non-woven fabric is preferably 5 to 30 g / m ² . If the basis weight of the non-woven fabric is large, even if a high-pressure water column flow is applied to the laminate from the paper sheet side to the non-woven fabric side, the pulp fibers that make up the paper sheet will not be in contact with the back surface of the non-woven fabric (that is, the surface that is not in contact with the paper sheet, that is, the non-equivalent). It becomes difficult to move to the contact surface), the pulp fibers are unevenly distributed only on one surface of the obtained composite sheet, and the water absorption tends to decrease at the non-contact surface of the non-woven fabric having less pulp fibers.

On the contrary, when the basis weight of the nonwoven fabric is small, the morphological stability of the nonwoven fabric is lowered and the wet strength of the obtained nonwoven fabric tends to be lowered. In addition, the gap between the non-woven fibers becomes large, and when high pressure water column flow is applied, the pulp fibers flow out from the gap, and when the high pressure water column flow after use is recovered, the pulp fibers are May be mixed in large quantities.

In one embodiment of the present invention, the non-woven fabric may be a long-fiber non-woven fabric in which hydrophobic long fibers are self-bonded to each other, or a fleece-like long length in which hydrophobic long fibers are not bonded to each other. It may be a fibrous nonwoven fabric. In particular, it is preferable to use a large number of point fusion areas where the hydrophobic long fibers are self-fused together and are arranged in a scattered manner. The reason for this is that since the non-woven fibers have a point-fused area that is self-fused to each other, the morphological stability is excellent, and the non-woven fibers are not self-fused in areas other than the point-fused area, Since they are collected in a free state, they are excellent in flexibility and easily entangled with pulp fibers.

Next, a mode of incorporating the antibacterial substance into the nonwoven fabric will be described. An antibacterial substance is added to a resin as a raw material during spinning, and the antibacterial substance is kneaded and spun. For example, a masterbatch pellet is prepared by kneading the antibacterial substance in a kneading concentration range of 10 to 35%, and the masterbatch pellet is mixed with a thermoplastic resin in which the antibacterial substance is not kneaded. Thereby, the dispersibility of the antibacterial substance can be improved. Next, the mixed resin is melt-spun.

The antibacterial substance used is preferably one having excellent heat resistance. Since organic antibacterial substances are generally vulnerable to heat,
An inorganic antibacterial substance containing a heavy metal having antibacterial properties, for example, silver, copper, zinc or the like is preferable. As the heavy metal carrier, zeolite, calcium phosphate, zirconium phosphate, soluble glass, silica gel or the like is used. The non-woven fabric and the paper sheet described above are laminated to form a composite sheet.

The ratio of the basis weights of the non-woven fabric and the paper sheet in this laminate is not particularly limited, but non-woven fabric: paper sheet = 1:
It is preferably set to 1-19. Non-woven fabric: paper sheet = When the ratio is less than 1: 1, the amount of non-woven fabric is
There is a tendency that the amount of pulp becomes relatively small and the water absorption and water retention of the obtained antibacterial composite sheet decrease. In addition, the amount of inexpensive pulp fibers is smaller than the amount of non-woven fibers, so that the resulting paper sheet tends to be expensive. On the contrary, non-woven fabric: paper sheet = 1:
When the basis weight of the paper sheet becomes heavier than 1 to 19, it becomes difficult for all of the pulp fibers constituting the paper sheet to be strongly entangled with the non-woven fiber, and when the obtained antibacterial composite sheet is used by being wetted. In addition, pulp fibers are likely to fall off.
Further, the amount of the non-woven fabric fiber becomes relatively small, so that the tensile strength and the like of the obtained antibacterial composite sheet tends to decrease.

After the paper sheet is laminated on the surface of the non-woven fabric, a high pressure water column flow is applied from the surface of the paper sheet toward the non-woven fabric side.
As a method of manufacturing a composite sheet, a technology of hydroentangling a synthetic fiber web and a paper sheet (Research disclosure, 17060, Ju
ne 1978) is known. Canadian Patent 841.39
According to No. 8, a sheet produced by using a high-pressure jet water stream has great damage resistance, flexibility, stretchability, abrasion resistance, and water absorption.

That is, the composite sheet is obtained by applying a high-pressure water column flow so that the high-pressure water column flow penetrates from the paper sheet side of the laminate to the nonwoven fabric side. This high-pressure water column flow is obtained by ejecting water at a high pressure through a nozzle hole having a fine diameter. For example, through a nozzle hole with a hole diameter of 0.01 to 0.3 mm, the nozzle pitch is 5 to 20 nozzles / cm, 10 to 150 kg /
Obtained by ejecting water at a pressure of about cm ² . When this high pressure water column stream is applied to the laminate, the high pressure water column stream collides with the paper sheet. Then, the paper sheet first adheres to the non-woven fabric, and then, in the adhered state, the paper sheet is broken, the pulp fibers constituting the paper sheet are isolated, and the pulp fibers are deformed such as bent and twisted. At the same time, sufficient kinetic energy is given to the pulp fiber to cause the pulp fiber to randomly move. As a result, it is possible to obtain a composite sheet having an appearance and flexibility similar to a cloth towel with a sense of volume.

A toilet seat cover is formed from the composite sheet thus obtained. The form of the toilet seat cover is not particularly limited, and can be various forms that have been reported so far, such as a bag-like form (FIG. 1) and an adhesive type (FIG. 2).

[0037]

The present invention will be described in more detail below, but of course the present invention is not limited thereto. In the examples and comparative examples,% means% by weight based on solid content.

Example 1 CMC benzalkonium salt (trade name: Kikkolate CMC-BE, manufactured by Nichirin Chemical Co., Ltd.), which is a fibrous CMC obtained by immobilizing benzalkonium on CMC having an etherification degree of 0.42, was used. Blended with unbeaten softwood kraft pulp,
A sheet having a basis weight of 38 g / m ^{2 was made} according to a conventional method. The pulp content at this time was CMC benzalkonium salt 2.5%,
The bleached softwood kraft pulp was 97.5%.

Next, a large number of polypropylene filaments having a fineness of 2.5 denier were accumulated to form a web. Then, this web was introduced between a heated concavo-convex roll and a plain roll, and the web was thermocompression bonded by the convex portion of the concavo-convex roll. In the area crimped by the convex portion, the long fibers were self-bonded to each other to obtain a long fiber nonwoven fabric. The long-fiber nonwoven fabric obtained was one in which a large number of spot fusion zones were arranged at intervals. And the area of each point fusion area is
0.3 mm ² , the total area of all spot fusion zones was 7 area% with respect to the surface area of the long-fiber nonwoven fabric. The basis weight of the long-fiber nonwoven fabric was 12 g / m ² .

The above-mentioned paper sheet was laminated on the surface of this long-fiber nonwoven fabric. Then, the paper sheet was placed on the upper side and the long fiber non-woven fabric was placed on the lower side, and the sheets were stacked on a transfer conveyor formed of a wire mesh. This laminate is then 20m /
While transferring at a speed of 1 minute, a nozzle hole with a hole diameter of 0.15 mm is 1 m
50 kg / cm ² using high pressure water column flow device lined up at m intervals
A high pressure water column flow was applied at a water pressure of. As described above, a composite sheet in which the pulp fibers forming the paper sheet and the long fibers forming the long fiber non-woven fabric were combined was obtained. An antibacterial test was conducted using this composite sheet.

Next, a toilet seat cover was prepared from the obtained composite sheet. First, two composite sheets were cut into the shape of the right half of the toilet seat, slightly larger than the size of the toilet seat. When the person sitting is called the front and the person hidden under the toilet seat is called the back, a stretchable material (gather) was attached to the stretchable material attaching portion 8 on the outside of the back sheet (see FIG. 3).

The stretchable material was prepared as follows. First, a 5 cm (width) × 11 cm (length) strip of long-fiber nonwoven fabric was prepared, and a double-sided tape having a width of 20 mm was attached to the center thereof. Then on it
560 denier rubber thread is stretched to double its size, 1 mm
Four fibers were stretched at intervals and parallel to the lengthwise direction, and another long fiber non-woven fabric was further laminated thereon. FIG. 4 shows a vertical cross-sectional view when the rubber thread portion is cut along the rubber thread. A cross-sectional view is shown in FIG. The stretchable material was attached to the composite sheet with double-sided tape while stretching the gather.

The toilet seat type sheet (back sheet) having elasticity thus obtained is used as the other toilet seat type sheet.
The (front sheet) and the edge portion 5 in FIG. 3 were attached to each other with double-sided tape to form a bag. A left half cover was also produced for the left and right objects by the same procedure. Finally, the adhesive layer for fixing the right and left covers on top of each other when using the double-sided tape (100 mm
Width) It was provided on the attachment part 6.

The tubular toilet seat cover obtained as described above is attached so that the gather surfaces are on the left and right sides of the toilet seat, respectively. This gather makes it easy to wear and fits the toilet seat properly after wearing. A continuous use test of this toilet seat cover was conducted. The antibacterial test results are shown in Table 1, and the continuous use test results are shown in Table 2.

Example ² A sheet having a basis weight of 38 g / m ² was made from 100% unbeaten softwood bleached kraft pulp according to a conventional method. Next, 0.5% of a silver-based inorganic antibacterial substance Novalon manufactured by Toagosei Co., Ltd. was added to polypropylene resin, and polypropylene fibers were spun while kneading the antibacterial substance. The other long fiber nonwoven fabric preparation conditions were the same as in Example 1. Then, a composite sheet was prepared in the same manner as in Example 1 to obtain a toilet seat cover using the composite sheet as a base material.

The results of the antibacterial test are shown in Table 1, and the results of the continuous use test are shown in Table 2.

Comparative Example 1 A commercial toilet seat cover made of pile knit fabric was prepared. The antibacterial test results are shown in Table 1, and the continuous use test results are shown in Table 2.

Comparative Example 2 A toilet seat cover was prepared in the same manner as in Example 1 except that the CMC benzalkonium salt was not added to the pulp. The antibacterial test results are shown in Table 1, and the continuous use test results are shown in Table 2.

[Test of antibacterial property]
Fungus is a shake flask prescribed by the Hygiene Processing Council of Textile Products.
It evaluated by the method according to the method. Test strain is a textile product test
Being a commonly used bacterial species and in a general environment
Which is a typical Gram-negative bacterium present in
Bacteria (Klebsiella pneumoniae IFO13277) and Gram-positive bacteria
Staphylococcus aur
eus 209P IFO12732) was used. Pre-culture medium
For culturing, normal broth medium as shown below is used in the main culture.
Agar medium was used. The composition of each medium is shown below.
did. As a procedure, first, the test strain is used in normal broth medium.
Cultivated at 37 ° C for 24 hours and sterilized by high pressure steam
About 10 with the phosphate buffer ^FourTrial diluted to pieces / ml
A test bacterial solution was prepared. Add 70 ml of this to an Erlenmeyer flask
And then 0.75 g dry heat sterilized at 160 ° C. for 2 hours
Each test sheet was included.

Then, the container was shaken at 340 r.p.m.
p. m. The mixture was shaken at 28 ° C. for 1 hour to bring the test pieces into sufficient contact with the bacteria in the bacterial solution. Next, a 10-fold dilution series from 10 times to 100,000 times the bacterial solution was prepared, and 1 ml of the bacterial solution of each concentration and about 15 ml of normal agar medium were used to make plates by the pour method. After culturing for 48 hours in a 37 ° C. incubator, the number of colonies was counted, and the sterilization rate (%) with respect to the number of bacteria before contact was calculated to evaluate antibacterial properties.

Normal agar medium (pH 7.0) Meat extract 5 g, peptone 10 g, sodium chloride 5 g, agar 15 g, distilled water 1000 ml Normal broth medium (pH 7.0) meat extract 5 g, peptone 10 g, sodium chloride 5 g, distilled water 1000 ml

[Continuous use test] Assuming that a cloth toilet seat cover is used for one week in a general household and is washed, the toilet seat cover of the present invention is used for one week, and whether or not there is deterioration in feeling in use (breakage or eyes). (As far as it can be seen, the dirt) was evaluated. The place of use A is a household of one person, and the place of use B is a household of four persons.

[0053]

[Table 1]

[0054]

[Table 2]

[0055]

According to the present invention, excellent strength and texture,
You can get a semi-disposable toilet seat cover. Furthermore, since it contains fibers fixed with an antibacterial substance or is kneaded into a non-woven fabric, it can be used safely and sanitarily. Since it is cheaper than the conventional cloth cover, it is a toilet seat cover suitable for semi-disposable use, such as after washing, throwing away if dirty without reuse ,.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a bag-shaped toilet seat cover.

FIG. 2 is an explanatory view of an adhesive-type toilet seat cover.

FIG. 3 is a view of the back of the toilet seat cover of Example 1 formed into a bag with a double-sided tape.

FIG. 4 is a vertical cross-sectional view of the elastic material of the toilet seat cover of the first embodiment taken along the length of the rubber thread portion.

FIG. 5 is a cross-sectional view of the elastic material in the toilet seat cover of the first embodiment.

[Explanation of symbols]

1 Toilet seat cover 2 Toilet seat outer shape 3 Adhesive part 4 Composite sheet 5 Edge part (double-sided tape sticking part) 6 Double-sided tape sticking part 7 Bonding part of right cover and left cover 8 Elastic material sticking part 9 Long fiber non-woven fabric 10 Both sides Tape (20mm width) 11 Thread rubber (560 denier thread rubber stretched to twice its size)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location A01N 59/20 A01N 59/20 Z A47K 13/14 A47K 13/14

Claims (2)

[Claims] 1. A composite sheet in which a paper sheet and a non-woven fabric are integrated by a high-pressure water column flow, wherein at least the paper sheet contains carboxymethyl cellulose on which an anti-bacterial substance is immobilized, or as the non-woven fabric, an anti-microbial substance is kneaded with a resin. An antibacterial composite sheet obtained by using a nonwoven fabric obtained by spinning. 2. A toilet seat cover obtained from a composite sheet in which a paper sheet and a non-woven fabric are integrated by a high-pressure column flow, wherein the composite sheet contains at least carboxymethylcellulose having an antibacterial substance immobilized thereon, or A toilet seat cover, which is an antibacterial composite sheet obtained by using a nonwoven fabric obtained by kneading and spinning an antibacterial substance in a resin as the nonwoven fabric.