Toilet Paper For Preventing Water Splashing Using Partial Hydrophobic Treatment Of Chlorinated Fatty Acid And Its Manufacturing Method

Abstract

The present invention provides a splash-reducing toilet paper comprising a hydrophobic base portion formed on a hydrophilic toilet paper. When buoyancy is increased by partially hydrophobizing conventional toilet paper with fatty acids chloride, if the hydrophobization ratio (area) is excessively high, the size of flakes with a relatively low degree of dissociation increases, causing the toilet or sewage pipe to clog during flushing; and if the hydrophobization ratio (area) is too low, the buoyancy of the toilet paper is not sufficiently increased, causing the splash-reducing toilet paper to sink. The present invention is intended to solve the above problems. The water splash-reducing toilet paper of the present invention is a toilet paper that is placed in advance on the toilet bowl to prevent water from splashing when urinating or defecating. Since it is partially hydrophobized with a fatty acid chloride, it does not sink for a certain period of time even when wet, thus maintaining the water splashing effect. Furthermore, as it dissociates into small flakes in water after a certain period, it has the advantage of being discharged without clogging the toilet or sewage pipe during flushing.

Description

Technology Field

[0001] The present invention relates to a method for treating toilet paper that is placed in advance on a toilet bowl to prevent water from splashing when urinating or defecating, by partially hydrophobizing it with a fatty acid chloride so that it does not sink even when wet and is discharged without clogging the toilet or sewage pipe during flushing. Background Technology

[0003] Currently in Korea, flush toilets, which feature a flushing function using water after use, are widely used. These flush toilets are classified into seated toilets and squat toilets. The seated toilet, which is commonly used, allows the user to urinate and defecate while seated. It consists of a main body containing water to an appropriate height for defecation, a water tank that supplies water to flush the inside of the main body after use, a toilet seat attached to the main body for sitting, and a cover that covers the main body when not in use. As such, seated toilets are installed and used in a wide variety of locations, ranging from ordinary homes to public restrooms used by many people, such as offices, parks, rest areas, schools, department stores, train stations, and terminals.

[0004] Recently, as hygiene issues in public restrooms have become a social concern, there is a growing awareness of the need to avoid unpleasant experiences or contamination problems caused by splashing urine or toilet water when using the toilet. In particular, as there are many instances where men complain about water splashing after the next user urinates, there has been a demand for measures to prevent the splashing of fine water droplets to ensure clean and hygienic use. To overcome the problem that water droplets splashing onto the toilet or the user during urination or defecation—even if invisible—can transfer to the user or subsequent users and cause hygiene issues, splash-proof toilet paper has been introduced (https: / / blog.naver.com / PostView.naver?blogId=myyoukim&logNo=222599837355&categoryNo=71&parentCategoryNo=0).

[0005] Conventional facial toilet paper contains wetting agents, which inevitably cause clogging when flushed in large quantities. In contrast, splash-reducing toilet paper is not treated with such agents, allowing it to unravel smoothly without clumping when in contact with water, thus preventing clogging. Placing one or two sheets of splash-reducing toilet paper in the toilet bowl before use prevents water from splashing onto the buttocks, thereby avoiding the discomfort caused by splashing water. Additionally, since the toilet paper is flushable, cleanup is neat, contributing to a cleaner bathroom environment. However, conventional splash-reducing toilet paper has the disadvantage of sinking into the water when wet; as the paper sinks instead of remaining afloat, it fails to prevent further splashing.

[0006] The patent documents and references mentioned in this specification are incorporated by reference into this specification to the same extent that each document is individually and clearly identified by reference. Prior art literature

[0008] Korean Patent Application 10-2015-0077380 Korean Patent Application 10-2015-0077379 Korean Patent Application 10-2016-0141919 Korean Patent Application 10-2017-0056785 The problem to be solved

[0010] The present invention was devised to solve the sinking problem of conventional splash-reducing toilet paper. The objective of the present invention is to provide splash-reducing toilet paper, which is designed to float on a toilet seat to prevent water from splashing when urinating or defecating, and to provide a method for manufacturing the same by partially hydrophobizing the toilet paper with fatty acids to prevent it from sinking. Is It is there.

[0011] Other objects and technical features of the present invention are more specifically presented by the following detailed description of the invention, claims, and drawings. means of solving the problem

[0013] The present invention provides a water splash-reducing toilet paper comprising a hydrophobic substrate formed in a hydrophilic toilet paper.

[0014] The water splash-reducing toilet paper of the present invention is characterized by forming a hydrophobic base portion by hydrophobizing a toilet paper with a basis weight of 40g, which is not a wet strength enhancer, using fatty acid chloride gas grafting so that the hydrophobized area ratio is 6 to 8%.

[0015] The above hydrophobic base portion is composed of a plurality of circular hydrophobic base portions with a diameter of 4 to 6 mm, and is characterized by the fact that the center of one hydrophobic base portion and the center of another hydrophobic base portion are separated by 14 to 18 mm.

[0016] The above hydrophobic matrix is ​​characterized by being formed such that six other hydrophobic matrix parts have a hexagonal pattern centered around one hydrophobic matrix, and the above-mentioned fatty acid chloride is myristoleic acid, palmitooleic acid, palmitoyl chloride, sapienic acid, oleic acid, eladic acid, vaccenic acid, linoleic acid, linoelaidic acid, α-linolenic acid, arachidonic acid, eicosapentanoic acid, erucic acid, docosahexaenoic acid, caprylic acid, capric acid, lauric acid, myristic acid, It is characterized by being one or more mixtures selected from palmitic acid, stearic acid, stearoyl chloride, arachidic acid, behenic acid, lignoceric acid, or cerotic acid.

[0017] The water splash-reducing toilet paper of the present invention is characterized by floating on the water surface for more than 30 minutes and having an undisintegrated rate of less than 5% according to the IWSFG PAS 3A - Accelerated Bench Top Disintegration Test standard of the International Wastewater Services Flushability Group (IWSFG) test method. Effects of the invention

[0019] The present invention provides a splash-reducing toilet paper comprising a hydrophobic base portion formed on a hydrophilic toilet paper. When buoyancy is increased by partially hydrophobizing conventional toilet paper with fatty acids chloride, if the hydrophobization ratio (area) is excessively high, the size of flakes with a relatively low degree of dissociation increases, causing the toilet or sewage pipe to clog during flushing; and if the hydrophobization ratio (area) is too low, the buoyancy of the toilet paper is not sufficiently increased, causing the splash-reducing toilet paper to sink.

[0020] The present invention is intended to solve the above problems. The water splash-reducing toilet paper of the present invention is a toilet paper that is placed in advance on the toilet bowl to prevent water from splashing when urinating or defecating. Since it is partially hydrophobized with a fatty acid chloride, it does not sink for a certain period of time even when wet, thus maintaining the water splashing effect. Furthermore, as it dissociates into small flakes in water after a certain period, it has the advantage of being discharged without clogging the toilet or sewage pipe during flushing. Brief explanation of the drawing

[0022] Figure 1 shows the hydrophobic substrate pattern of the splash-reducing toilet paper of the present invention. Figure 2 shows the result of the splash-reducing toilet paper of the present invention floating on the water surface even after being immersed in water for 30 minutes. Specific details for implementing the invention

[0023] The present invention is intended to solve the problem of splash-reducing toilet paper sinking when placed in the toilet bowl in advance to prevent water from splashing when urinating or defecating.

[0024] The present invention aims to provide a splash-reducing toilet paper that can be discharged without clogging the toilet or sewage pipe during flushing, by solving the above problem by partially hydrophobizing the toilet paper with fatty acids to increase buoyancy so that it does not sink, and by ensuring that it does not sink even when wet for a certain period of time, thereby maintaining the performance of effectively preventing water splashing when using the toilet, while maintaining the undissociated rate below a certain level according to the IWSFG PAS 3A - Accelerated Bench Top Disintegration Test standard of the International Wastewater Services Flushability Group (IWSFG) test method.

[0025] The water splash-reducing toilet paper of the present invention is characterized by forming a hydrophobic base portion by hydrophobizing a toilet paper with a basis weight of 40g without a wet strength enhancer using fatty acid chloride gas grafting so that the hydrophobic area ratio is 6 to 8%, wherein the hydrophobic base portion is composed of a plurality of circular hydrophobic base portions with a diameter of 4 to 6 mm, and the center of one hydrophobic base portion and the center of another hydrophobic base portion are separated by 14 to 18 mm.

[0026] The water splash-proof toilet paper of the present invention has a hydrophobic base portion that does not absorb water formed in a certain ratio and pattern as described above, and a hydrophilic portion that absorbs water mixed therein. Since the hydrophobic base portion does not get wet, it increases the buoyancy of the toilet paper, so that the toilet paper does not sink but floats on the water surface for a certain period of time, thereby preventing water splashing. In addition, the hydrophilic portion easily dissociates when the toilet paper gets wet, and the hydrophobic base portion discharged through dissociation has a small size of 4 to 6 mm in diameter, so it has the effect of not clogging the toilet or sewage pipe during flushing.

[0027] If the hydrophobic surface area ratio of the present invention is less than 6%, the time it floats on the water surface is reduced to less than 30 minutes, which may reduce the splashing effect; if it exceeds 8%, the dissociability is reduced, which may obstruct the passage of the toilet or sewage pipe during flushing. If the size of the hydrophobic base part exceeds 6 mm, it may obstruct the passage of the toilet or sewage pipe during flushing; and if it is less than 4 mm, the dissociability may be reduced because the spacing between the hydrophobic base parts must be reduced to maintain the ratio of the hydrophobic base parts.

[0028] The above hydrophobic base is characterized by being formed such that six hydrophobic bases are arranged in a hexagonal pattern centered around one hydrophobic base. Specifically, the hydrophobic base of the present invention is designed as a circle with a diameter of 4-6 mm as shown in FIG. 1, and is arranged to form a hexagon with a distance of 14 to 18 mm between the centers of each circle to form a hexagon, and then an additional circle is placed in the center to form a hexagonal pattern, wherein the number of hexagonal centers (the number of points constituting a complete hexagon) was 7.

[0029] According to an embodiment of the present invention, the hydrophobic surface area ratio of the splash-reducing toilet paper is adjusted to 7%, and the hydrophobic pattern is designed as a circle with a diameter of 5 mm as shown in FIG. 1, arranged to form a hexagon with a distance of 16 mm between the centers of each circle, and then an additional circle is placed in the center to form a hexagonal pattern, and at this time, the number of hexagonal centers (the number of points constituting a complete hexagon) is 7.

[0030] The above fatty acid chloride gas grafting refers to a reaction in which gaseous fatty acid chloride is reacted with hydroxyl groups (-OH) of a hydrophilic substrate as shown in Chemical Formula 1 below to form a fatty acid ester on the substrate and produce hydrogen chloride (HCl) as a byproduct.

[0031]

[0032] When fatty acid esters are formed on the substrate by the above-mentioned chlorinated fatty acid gas grafting, the substrate becomes hydrophobic. The above-mentioned fatty acids are myristoleic acid, palmitooleic acid, palmitoyl chloride, sapienic acid, oleic acid, eladic acid, vaccenic acid, linoleic acid, linoelaidic acid, alpha-linolenic acid, arachidonic acid, eicosapentanoic acid, erucic acid, docosahexaenoic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, stearoyl chloride, It may be one or more mixtures selected from arachidic acid, behenic acid, lignoceric acid, or cerotic acid, but is not limited thereto. Preferably, the chlorinated fatty acid is a mixture of palmitoyl chloride (C16) and steroyl chloride (C18). If the molecular weight of the chlorinated fatty acid is small, it vaporizes well and facilitates the gas graft reaction, but there is a limitation in that the degree of hydrophobization due to the bonding of fat esters is insufficient. Conversely, if the molecular weight of the chlorinated fatty acid is large, the degree of hydrophobization is excellent, but it vaporizes poorly and has the disadvantage of slow gas graft reaction.To overcome the above limitations, by mixing a small molecular weight fatty acid chloride and a large molecular weight fatty acid chloride, such as palmitoyl chloride (C16) and steroyl chloride (C18), a multi-stage hydrophobization reaction can be performed to improve hydrophobization efficiency by utilizing the advantages of both types of fatty acids chloride. The above multi-stage hydrophobization reaction means that when the temperature of the paper coated with the fatty acid chloride is not sufficiently raised at the beginning of the reaction, palmitoyl chloride (C16), which is easy to vaporize, reacts primarily with hydroxyl groups to hydrophobize, and when the temperature of the paper is sufficiently raised, steroyl chloride (C18) participates in the reaction to perform hydrophobization.

[0033] The fatty acid chloride gas grafting of the present invention can be performed using a fatty acid chloride gas grafting facility equipped with an anilox roller. The fatty acid chloride gas grafting facility equipped with the anilox roller utilizes a gravure printing method and is suitable for mass printing. The operation of the fatty acid chloride gas grafting facility is performed by setting the temperature of the anilox roller to 40-80℃ and the coating amount to 0.3-0.7 g / m² 2 ; This can be performed on toilet paper with a basis weight of 40-50g by setting the temperature of the drying roller to 170-210℃; and the temperature of the high-temperature air for air knife flushing to 280-320℃, and setting the operating speed to 30-70m / min. Preferably, the operation of the fatty acid chloride gas grafting equipment is such that the temperature of the anilox roller is 60℃; and the application amount is 0.5g / m² 2 ; The temperature of the drying roller is set to 190℃; and the temperature of the high-temperature air for air knife flushing is set to 300℃ and the operating speed is set to 50 m / min, and this is performed on a toilet paper with a basis weight of 40 g. The grafting of the above fatty acid chloride can be performed using a conventional gas grafting method (Patent Nos: 10-2015-0077380, 10-2015-0077379, 10-2016-0141919, 10-2017-0056785).

[0034] The water splash-reducing toilet paper of the present invention is a hydrophilic substrate (paper) composed of cellulose fibers having hydroxyl groups (-OH). Any substrate having hydroxyl groups (-OH) can be used for hydrophobization. Considering that the toilet paper of the present invention must be discharged without clogging the toilet or sewage pipe during rinsing, a paper with excellent water absorption is preferred to facilitate dissociation in water.

[0035] The above hydrophobic substrate is formed by partially gravure printing a fatty acid chloride onto the above hydrophilic substrate and performing a graft reaction. The printing of the fatty acid chloride can be done in a desired shape on a substrate where hydrophilic hydroxyl groups are present, and any printing method capable of transferring a certain amount can be used without limitation. The method for partially hydrophobizing the splash-reducing toilet paper may include the step of preparing a printing roll by etching a pattern on the anilox roll of a gravure printer so that the fatty acid chloride is transferred to the portion to be hydrophobized; and the step of hydrophobizing a portion of the splash-reducing toilet paper by performing gas grafting using the fatty acid chloride.

[0036] The water splash-reducing toilet paper of the present invention is characterized by floating on the water surface for more than 30 minutes and having an undisintegrated rate of less than 5% according to the IWSFG PAS 3A - Accelerated Bench Top Disintegration Test standard of the International Wastewater Services Flushability Group (IWSFG) test method.

[0037] The present invention will be explained in detail through the following examples.

[0039] Examples

[0041] Example: Manufacture of splash-proof toilet paper

[0042] The splash-reducing toilet paper of the present invention is partially hydrophobized through fatty acid chloride gas grafting. The hydrophobization treatment of the splash-reducing toilet paper of the present invention was performed using a fatty acid chloride gas grafting facility installed at Company T, a release paper manufacturer located in Dongducheon, Gyeonggi-do. A fatty acid chloride coating was applied to a toilet paper with a basis weight of 40g that does not contain a wet strength enhancer, with an application amount of 0.5g / m² based on the front surface of an anilox roller. 2 The hydrophobic surface area ratio of the splash-reducing toilet paper was adjusted to 7%, and the hydrophobic pattern was designed as a circle with a diameter of 5 mm as shown in Fig. 1, spaced so that the distance between the centers of each circle was 16 mm to form a hexagon, and then an additional circle was placed in the center to form a hexagonal pattern (Hexagonal Pattern), at which time the number of hexagonal centers (the number of points constituting a complete hexagon) was 7.

[0043] The fatty acid chloride used was a product mixed with palmitoyl chloride (C16) and stearoyl chloride (C18). The temperature of the anilox (gravure) roller was fixed at 60°C, the temperature of the drying roller was adjusted to 190°C, and the temperature of the hot air for air knife flushing was set to 300°C. Under the above treatment conditions, the hydrophobization treatment was carried out by fixing the operating speed of the equipment to 50 m / min.

[0044] In order to verify whether the buoyancy of the toilet paper treated with the above pattern is sufficient to prevent it from sinking, the floating status was checked after 30 minutes in room temperature water. In order to determine whether the splash-reducing toilet paper causes problems such as clogging the toilet or sewage pipes during flushing and whether it disintegrates easily, the undisintegrated rate of the toilet paper was analyzed based on the test method of the International Wastewater Services Flushability Group (IWSFG), IWSFG PAS 3A - Accelerated Bench Top Disintegration Test.

[0045] As a comparative example, toilet paper was used that had not undergone hydrophobization treatment and had a basis weight of 40g without the addition of a wet strength enhancer.

[0047] Experimental Example: Comparison of Floatingness and Dissociation

[0048] For the embodiments and comparative examples of the present invention, buoyancy was checked after 30 minutes of floating in room temperature water, and the undisintegrated rate was analyzed based on the International Wastewater Services Flushability Group (IWSFG) test method, IWSFG PAS 3A - Accelerated Bench Top Disintegration Test, in order to determine whether water disintegration is easy so as not to cause problems such as clogging the toilet or sewage pipes when flushing the toilet.

[0049] Table 1 shows the results of analyzing the floatingness and dissociation of the embodiments and comparative examples of the present invention.

[0050] Check if the toilet paper floats 30 minutes after floating it on the water surface Ratio of undissociated material (%) from toilet paper dissociation evaluation results Examples O 4.9 Comparative example X 2.8

[0051] According to Table 1 above, it can be confirmed that for both the examples and comparative examples, regardless of whether hydrophobization treatment was performed, the ratio of undissociated material in the dissociation evaluation results was less than 5%, indicating that dissociation is easy and will not cause problems such as clogging the toilet or sewage pipes when flushing the toilet. These results indicate that toilet paper hydrophobized in a pattern through a gas graft reaction of fatty acids maintains dissociation properties similar to those of untreated toilet paper.

[0052] When the splash-reducing toilet paper of the present invention (Example) was floated on water, it was confirmed that it remained floating on the water even after 30 minutes, unlike the Comparative Example. This is because the buoyancy of the toilet paper of the Example was much superior to that of the Comparative Example, as the area that does not get wet when in contact with water was 7%, and the pattern was a hexagonal shape with a diameter of 5 mm as shown in Fig. 1, with the distance between the centers of each circle being 16 mm.

[0053] The specific embodiments described herein represent preferred embodiments or examples of the invention and do not limit the scope of the invention. It is evident to those skilled in the art that variations and other uses of the invention do not deviate from the scope of the invention as described in the claims of this specification.

[0054] The present invention reveals that it is the result of a research project commissioned by a company to the Industry-Academic Cooperation Foundation of Kangwon National University (Project No.: 202306090001; Research Project Title: Research on Technology Development for Adding Health Diagnosis Function to Splash-Reducing Tissues - Phase 1 Laboratory-Scale Performance Evaluation Study; Research Period: April 1, 2023 ~ August 20, 2023).

Claims

Claim 1 A water splash-reducing toilet paper comprising a hydrophobic base portion formed in a hydrophilic toilet paper, wherein the hydrophobic base portion is formed by hydrophobizing a hydrophilic toilet paper with a basis weight of 40g, without the addition of a wet strength enhancer, using fatty acid chloride gas grafting to achieve a hydrophobization area ratio of 6 to 8%. Claim 2 delete Claim 3 A water splash-reducing toilet paper according to claim 1, characterized in that the hydrophobic base portion is composed of a plurality of circular hydrophobic base portions with a diameter of 4 to 6 mm, and the center of one hydrophobic base portion and the center of another hydrophobic base portion are separated by 14 to 18 mm. Claim 4 In claim 3, the water splash-reducing toilet paper is characterized in that the hydrophobic base portion is formed such that six other hydrophobic base portions have a hexagonal pattern centered around one hydrophobic base portion. Claim 5 In claim 1, the chloride fatty acid is myristoleic acid, palmitooleic acid, palmitoyl chloride, sapienic acid, oleic acid, eladic acid, vaccenic acid, linoleic acid, linoelaidic acid, alpha-linolenic acid, arachidonic acid, eicosapentanoic acid, erucic acid, docosahexaenoic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, steroid Water splash-reducing toilet paper characterized by being one or more mixtures selected from stearoyl chloride, arachidic acid, behenic acid, lignoceric acid, or cerotic acid. Claim 6 In claim 1, the splash-reducing toilet paper is characterized by floating on the water surface for 30 minutes or more and having an undisintegrated rate of less than 5% according to the IWSFG PAS 3A - Accelerated Bench Top Disintegration Test standard of the International Wastewater Services Flushability Group (IWSFG) test method.

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