Novel disposable hygienic product PH detection core body and preparation method thereof

Abstract

The invention provides a novel disposable hygienic product PH detection core body and a preparation method thereof, the core body comprises a novel PH indicating liquid mixture and a non-woven fabric, and the indicating liquid mixture is coated on the non-woven fabric through a coating device, dried and cut into a fixed size. The core body shows different colors when encountering vaginal secretions with different pH values: the pH value of the vaginal secretions with normal physique is weakly acidic and mostly ranges from 4 to 4.5, and the secretions are colorless or faint yellow when encountering detection; the PH value of vaginal secretion with abnormal constitution is weakly alkaline and is between 6 and 6.5, and the core body turns blue when encountering detection; the amniotic fluid secretion flows out and is alkaline, the pH value is 7.5-9, and the core body turns purple when encountering the detection. And according to the color change caused by different PH values, different physiological statuses of the human body can be identified, and the method can be widely and universally applied to disposable sanitary products.

Description

Technical Field

[0001] The invention relates to a detection core for disposable sanitary products, in particular to a detection core for disposable sanitary products with a pH color development detection function and a preparation method thereof. Background Art

[0002] Vaginal discharge is the fluid secreted by the female reproductive system, also known as leucorrhea. General character examination is to observe the color and character of vaginal discharge. In fact, vaginal discharge examination in the hospital is a routine examination of leucorrhea, which is a common gynecological examination. It is a physical examination related to female physiological hygiene to judge whether a woman has abnormal leucorrhea through five examinations such as vaginal pH value, vaginal cleanliness, and vaginal microbial examination. Among them, pH monitoring is an important parameter for understanding the health status of women's body, and it is also an important indicator for easy home real-time monitoring. Normal female vaginal discharge is weakly acidic, and the pH is usually between 4-4.5. In some special circumstances or physiological periods, the pH tends to rise. For example: when the vagina is inflamed, the pathogen consumes glycogen and hinders the fermentation of vaginal bacilli. Once the alkalinity of the human body environment increases, the pathogen multiplies in large numbers and the pH value rises. Vaginal Gardnerella is a Gram-positive or chromatin-indeterminate coccobacillus, facultative anaerobic, with the most suitable temperature of 35-37℃ and the most suitable pH of 6-6.5. Bacterial vaginosis can be seen with a large number of Gardnerella and a higher pH. In addition, the pH value of amniotic fluid secretions in the late pregnancy is alkaline, with a pH value of approximately between 7.5 and 9. One of the laboratory diagnostic criteria for abnormal vaginal secretions is a pH value of secretions > 4.5. Therefore, the pH of vaginal secretions is an important parameter for women's self-monitoring of their physical health.

[0003] Disposable sanitary products currently on the market usually do not have a pH detection core. In the utility model patent with publication number CN211583846U, although a sanitary napkin that can detect the pH value of the female private parts is disclosed, which has a pH detection function, the detection chip is made by simply soaking the pH indicator liquid and non-woven fabric, and lacks systematic coating and bonding technology and preparation research, which limits the effects of liquid carrying and color development. Summary of the invention

[0004] In view of this, in order to fill the gap in the prior art, the purpose of the present invention is to provide a new type of disposable sanitary product PH detection core and its preparation method and application. The new PH detection core has the characteristics of indicating whether the human body is healthy and automatically monitoring whether the secretion is normal. After encountering the secretion, different body constitutions have different PH values ​​and different colors are displayed. The PH detection core made by the present invention can be used in disposable sanitary products.

[0005] A novel disposable sanitary product pH detection core provided by the present invention comprises a novel pH indicator liquid mixture and a non-woven fabric, and is characterized in that the novel pH indicator liquid mixture is coated on the non-woven fabric.

[0006] The novel pH indicator liquid mixture of the present invention contains, by weight percentage, 0.1-2 parts of bromocresol green, 0.2-5 parts of phenolphthalein, 20-30 parts of ethanol, 1-5 parts of 3-iodo-2-propynyl-N-n-butylcarbamate, 40-65 parts of water, 0.1-3 parts of tackifying resin and 0.5-5 parts of polymer.

[0007] In the novel pH indicator liquid mixture provided by the present invention, the pH indicator is selected from bromocresol green and methylene blue, preferably bromocresol green, whose pH color change range is 3.8 (yellow-green)-5.4 (blue). Bromocresol green belongs to normal non-toxic indicators, has high safety, accurate color development, is a commonly used biochemical reagent, and is particularly suitable for protein electrophoresis separation and detection in biology and biochemical laboratories. It can also be used for nucleic acid separation and detection. It also plays an important role in cell biology research. Bromocresol green can also be used for the study of cell viability detection and cell membrane permeability. Bromocresol green is very safe to proteins, nucleic acids, human cells, etc., so it is also very safe and reliable to be used for sanitary products.

[0008] In the novel pH indicator liquid mixture provided by the present invention, the other pH indicator is selected from phenolphthalein and thymol blue, preferably phenolphthalein, whose pH color change range is 8 (colorless)-10 (red-purple), and phenolphthalein has a wide color development range, which is more suitable for detecting the pH value of alkaline secretions.

[0009] In the novel pH indicator liquid mixture provided by the present invention, the antibacterial agent is selected from 3-iodo-2-propynyl-N-n-butylcarbamate (IPBC-30), which is an environmentally friendly and low-toxic fungicide, has a high-efficiency and lasting bactericidal and mildew-proof ability against molds and yeasts, is widely used, has a broad-spectrum antibacterial activity, and has a strong inhibitory and killing effect on yeasts, molds and yeasts.

[0010] In the novel pH indicator liquid mixture provided by the present invention, the polymer is selected from hydroxyethyl cellulose and xanthan gum, preferably hydroxyethyl cellulose, which increases the initial viscosity of the indicator liquid and ensures the amount of liquid applied.

[0011] In the novel pH indicator liquid mixture provided by the present invention, the thickening resin is selected from polyacrylic acid resins, one or a mixture of two or more thickeners. Carbomer 940 is preferably used, which has good affinity, reduces irritation, and plays a softening role in this formula.

[0012] The novel pH indicator liquid mixture provided by the present invention uses anhydrous ethanol, which dissolves the indicator quickly and has a sterilizing and disinfecting effect. It has good compatibility and can increase the solubility of the indicator.

[0013] At the same time, the pH value of the indicator liquid mixture is adjusted to weak acidity, so that the pH color-changing chip is weakly acidic, close to the normal pH value of the human body, not easy to breed bacteria, and is beneficial to health.

[0014] The core color development layer provided by the present invention adopts spunlace non-woven fabric, and the non-woven fabric has a gram weight of 45-55g / square meter; it has the characteristics of easy absorption and fast color development.

[0015] The preparation method of the novel pH indicator liquid mixture of the present invention is as follows: confirm that the bottom valve of the reaction tank is closed, add ethanol, start the stirring paddle, add the pH indicator to stir the materials in the reaction tank until they are completely dissolved and stirred until they are transparent; uniformly add the polymer into the reaction tank and stir until it is melted; uniformly add the thickening resin into the reaction tank, wait for the thickening resin to be completely melted, and fully react; after the reaction is completed, add 3-iodo-2-propynyl-N-n-butylcarbamate; after the reaction is completed, filter the molten material in the reaction tank; notify the inspection sampling and testing of the indicator liquid after filtering through a nylon net with a mesh size of more than 260; after passing the filling, transfer to the coating process.

[0016] The preparation method of a novel disposable sanitary product PH detection core body of the present invention is as follows: set the coating machine speed to 60r / min and the sizing speed base to 15r / min, apply the core indicator liquid to the surface of the non-woven fabric according to the set area, and the liquid volume is set to 15g / m2; form the PH detection core body, the coating temperature is room temperature, the pressure is normal pressure, and then the non-woven fabric is roller extruded; set a dryer after the non-woven fabric is coated, set the temperature of the dryer to 70°C and the roller speed to 16r / min. Set a slitting machine after the dried color development layer, and the slitting width is 30mm or 60mm.

[0017] Compared with the prior art, the novel disposable sanitary product pH detection core and its preparation method and application described in the present invention have the following advantages:

[0018] (1) The present invention prepares a disposable sanitary product pH detection core, which is safe and non-irritating and can reflect the user's physical health status. The pH value of vaginal secretions of normal physique is weakly acidic, and the pH value is mostly between 4-4.5. The secretions are colorless or light yellow when encountering the detection core; the pH value of vaginal secretions of abnormal physique such as inflammation is weakly alkaline, and the pH value is between 6-6.5. It turns blue when encountering the detection core; amniotic fluid secretions are alkaline, and the pH value is in the range of 7.5-9. It turns purple when encountering the detection core.

[0019] (2) The advantage of the present invention lies in the particularity of the preparation process. According to the required pH color development range, different indicators are scientifically and reasonably matched, and the corresponding solvents are preferably used to dissolve the indicators respectively. Under certain strictly controlled conditions such as temperature, pressure, stirring speed, etc., after compounding, mixing and dissolving, standing and aging, a 260-mesh filter is selected to prepare a pH core color indicator liquid mixture.

[0020] (3) The advantage of the present invention also lies in the particularity of the coating process. The indicator liquid is sprayed on the spunlace non-woven fabric in a spraying manner. After strict key control of temperature, vehicle speed, pressure, liquid volume and other process steps, the prepared pH detection core has the characteristics of stable system, accurate color development, softness and skin-friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a color diagram of a pH detection chip coated with a detection liquid mixture according to Example 5 of the present invention;

[0022] Figure 2 A comparison diagram of the existing coating detection liquid of the embodiment of the present invention and the control group;

[0023] Figure 3 This is a color comparison diagram of the common chip of Example 5 of the present invention and the control group;

[0024] Figure 4 It is a comparison diagram between the embodiment of the present invention and the original one.

[0025] in Figure 2 The examples in the examples refer to Examples 1-5 (No. 5), and the comparative examples refer to Comparative Examples 1-3 (No. 3). Figure 3 The examples in the examples refer to the pH detection core, and the comparative examples refer to the ordinary chip. Figure 4 Comparison diagram of the embodiment of the PH detection sanitary pad made of the PH detection chip of the present invention and the original ordinary sanitary pad DETAILED DESCRIPTION

[0026] Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods, unless otherwise specified, are all conventional methods.

[0027] The following are specific embodiments of the present invention. The raw materials, equipment, etc. used in the following embodiments can be obtained by purchase unless otherwise specified.

[0028] The present invention will be described in detail below with reference to the embodiments.

[0029] Embodiments: Raw materials were weighed according to the ratios in Table 1, and indicator liquid was prepared according to the preparation method after Table 1, and absorbent cores of different embodiments were obtained accordingly, as shown in Table 1:

[0030]

[0031]

[0032] The difference between Example 5 and Comparative Example 3 is that, based on Example 3, the viscosity is low, the amount of liquid is small, the penetration is slow, and the color development is not obvious. The amount of polyacrylic acid and hydroxyethyl cellulose added in Example 3 is small, so that the viscosity of the indicator liquid mixture is low, and the liquid amount requirement of the non-woven fabric cannot be met during coating, and the normal color development of the pH detection chip cannot be guaranteed. The pH detection core of Example 5 has the characteristics of stable system, sufficient liquid amount, accurate color development, softness and skin-friendliness, and has the best performance compared with the comparative example.

[0033] Figure 2 is a comparison diagram of the existing coating test solution of the embodiment of the present invention and the control group, wherein Figure 2 The examples in the description refer to Examples 1-5 (No. 5), and the comparative examples refer to Comparative Examples 1-3 (No. 3).

[0034] The preparation method of the detection core of each embodiment comprises the following steps:

[0035] The core indicator liquid mixture of the present invention specifically comprises the following steps:

[0036] S1: Confirm that the bottom valve of the reaction tank is closed, add ethanol, start the stirring paddle, and add the indicator

[0037] S2: Stir the materials in the reaction tank of S1 until they are completely dissolved and until they are transparent;

[0038] S3: Evenly add the polymer into the reaction tank of S2 and stir until it melts;

[0039] S4: evenly add thickening resin into the reaction tank of S3, wait until all the thickening resin is melted, and then fully react;

[0040] S5: After the reaction in S4 is completed, add 3-iodo-2-propynyl-N-n-butylcarbamate;

[0041] S6: After the reaction in S5 is completed, the molten material in the reaction tank is filtered;

[0042] S7: The indicator liquid mixture filtered in S6 is notified for sampling and testing; if qualified, it will enter the coating process.

[0043] The coating of the present invention specifically comprises the following steps:

[0044] S1: Set the coating machine speed to 60r / min and the sizing speed base to 15r / min, and apply the core indicator liquid mixture to the surface non-woven fabric according to the set area. The coating temperature is room temperature and the liquid volume is set to 15g / m 2 ;

[0045] S2: Compounding the indicator liquid mixture with the color developing layer to form a pH detection core, wherein the coating temperature is room temperature and the pressure is normal pressure; and then roller extruding the non-woven fabric;

[0046] S3: After the nonwoven fabric is coated, a dryer is set to dry the nonwoven fabric. The temperature of the dryer is set to 70°C and the roller speed is set to 16 r / min.

[0047] S4: After drying, the pH detection core is obtained. A slitting machine is set after the drying to cut it into the required width.

[0048] Effect evaluation and performance testing: The performance of the test core of the embodiment was tested. The test items and results are shown in Table 2.

[0049] Table 2 is the performance test data of the pH detection core of each embodiment

[0050]

[0051] Example 5 is a prior art PH detection core, wherein the core is composed of a spunlace nonwoven fabric and a PH indicator liquid mixture, and the indicator liquid mixture and the nonwoven fabric are combined together by spraying or spraying to form a PH detection core for disposable sanitary products. The PH detection core prepared by the formula system and preparation method of the present invention has the characteristics of stable system, accurate color development, soft skin-friendly, safe and non-irritating. By combining the principle of PH color change, the PH color change core developed has the advantages of fast absorption, accurate color development, softness, etc. compared with ordinary chips. The detection core made by the present invention can be used in disposable sanitary products.

[0052] Figure 3 This is a color comparison diagram of the common chip of Example 5 of the present invention and the control group, wherein Figure 3 The embodiments in the examples refer to pH detection cores, and the comparative examples refer to ordinary chips.

[0053] Example 6 is a sanitary product made of a PH detection core according to the prior art, wherein the core is composed of a PH detection liquid mixture and a spunlace non-woven fabric, the panty pad is composed of a PH detection core and wood pulp dust-free paper, the PH detection core and the wood pulp dust-free paper are bonded with wet strength glue or structural glue, and are wrapped with non-woven fabric to form a PH detection sanitary panty pad.

[0054] Figure 4 It is a comparison diagram between the embodiment of the present invention and the original one, Figure 4Comparison diagram of the embodiment of the PH detection sanitary pad made of the PH detection core of the present invention and the original ordinary sanitary pad

[0055] like Figure 4 As shown, compared with the PH detection sanitary pad made of the PH detection core in the prior art and the ordinary sanitary pad in the comparative example, the new PH detection sanitary pad prepared by the present invention ensures a certain absorption capacity, a fast absorption speed, a shorter moisture permeability time, and can accurately detect the physiological health status of women. The difference between the ordinary sanitary pad and Example 6 is that the ordinary pad only plays a sanitary protection role, while the PH detection sanitary pad can not only play a sanitary protection role, but also can display the physiological health status of women through the PH color changing chip, which is a good way to monitor different health conditions of the human body and achieve the purpose of protecting the physiological and sanitary health of women. Not only from the perspective of women's huge consumption potential, but also from the perspective of protecting their health, in order to better stand on the women's side to understand their needs and suggestions, and constantly innovate product functions, according to the physiological and psychological needs of women for sanitary napkins, to explore their use of such products and specific categories. At present, products for detecting women's physiological health are still scarce in the field of disposable sanitary products, especially products with PH detection cores are still in a backward state. In the future, disposable sanitary products will not only better protect women's health, but also fill the domestic gap and have a certain market demand. This product has a lot of room for development and occupies a place in the domestic consumption market.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel disposable sanitary product pH detection core and a preparation method thereof, characterized in that: A novel pH indicator liquid mixture is prepared and coated on a non-woven fabric by a coating method to prepare a pH detection core.

2. A novel disposable sanitary product pH detection core as claimed in claim 1, characterized in that: The novel pH indicator liquid mixture contains, by weight percentage, 0.1-2 parts of bromocresol green, 0.2-5 parts of phenolphthalein, 20-30 parts of ethanol, 1-5 parts of fungicide 3-iodo-2-propynyl-N-n-butylcarbamate, 40-65 parts of water, 0.1-3 parts of tackifying resin carbomer (polyacrylic acid), and 0.5-5 parts of polymer hydroxyethyl cellulose (HEC).

3. A novel disposable sanitary product pH detection core as claimed in claim 1, characterized in that: The nonwoven fabric has a grammage of 45-55 g / m 2 .

4. The method for preparing a novel disposable sanitary product pH detection core according to claim 1, characterized in that: The following steps are included: S1: Add ethanol to the reaction tank, start the stirring paddle, add the pH indicator and stir the materials in the reaction tank until they are completely dissolved and stirred until they are transparent; evenly add the polymer to the reaction tank and stir until it melts; evenly add the thickening resin to the reaction tank and wait until the thickening resin is completely melted and fully react; after the reaction is completed, add 3-iodo-2-propynyl-N-n-butylcarbamate; after the reaction is completed, filter the molten material in the reaction tank; notify the inspection sampling and testing of the indicator liquid after filtering through a nylon mesh with a mesh size of more than 260; after passing the filling and coating process; S2: During the coating process, the speed of the coating machine is set to 60r / min, the sizing speed base is 15r / min, the coating temperature is room temperature, and the liquid volume is set to 15g / m 2 ; S3: The drying process sets the drying machine temperature to 70°C and the roller speed to 16r / min; S4: The shearing process cuts the coated and dried nonwoven fabric into required widths.

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