WO2021115109A1

WO2021115109A1 - Preparation method for disposable absorbent article added with shea butter

Info

Publication number: WO2021115109A1
Application number: PCT/CN2020/130706
Authority: WO
Inventors: 黄翠玉; 梁宗文
Original assignee: 福建恒安集团有限公司
Priority date: 2019-12-09
Filing date: 2020-11-22
Publication date: 2021-06-17
Also published as: CN110946714A; CN110946714B

Abstract

A preparation method for a disposable absorbent article added with shea butter, for solving the problems in the prior art of a complicated production process of a sanitary product and being easy to cause foreign body sensation and allergies after the sanitary products obtained by existing production methods are in contact friction with the skin. The method comprises the preparation steps of preparing a liquid-permeable surface layer, preparing an absorbent body, and preparing a liquid-impermeable bottom layer, as well as combining the liquid-permeable surface layer, the absorbent body, and the liquid-impermeable bottom layer into a whole. The preparation of the liquid-permeable surface layer comprises the following steps: 1) preparing hydrophilic non-woven fabric; 2) on-line spraying or scraping liquid shea butter on the hydrophilic non-woven fabric; 3) after step 2), on-line applying cold air to quickly dry the shea butter; and 4) on-line compounding hydrophobic non-woven fabric on two lateral sides of the hydrophilic non-woven fabric processed in step 3).

Description

Preparation method of disposable absorbent article added with shea butter

Technical field

The invention relates to the field of sanitary products, in particular to a preparation method of a disposable absorbent article added with shea butter.

Background technique

Disposable absorbent articles in the prior art, such as sanitary napkins, whose top and side layer materials are in contact with the skin. Due to the ergonomic structure, the sanitary napkin cannot be placed flat in actual use, but the body of the sanitary napkin is deformed. The material rubs against the private parts and the side layer material against the inner thighs, resulting in a foreign body sensation, severe fluffing of the material, and even allergies.

Chinese Patent No. 201621270224.5 discloses a hypoallergenic gauze sanitary napkin, including a long body, the body includes a hydrophilic layer, an absorbent core and a leak-proof bottom film, the absorbent core is made of hypoallergenic Made of gauze material, the width of the absorbent core is 3/5 the width of the body, and a pair of circular adhesive sheets are arranged on the bottom of the leak-proof base film. The center is set symmetrically, the diameter of the adhesive sheet is 1/3 of the width of the body, 1/2 of the adhesive sheet is located directly under the absorbent core, and the bodies on both sides of the absorbent core The styling belts are respectively arranged in the shape of a long strip. This patent uses hypoallergenic gauze material to make the absorbent core, thereby exerting its anti-allergic effect. However, the cost of gauze is relatively high, and it is generally used for multiple times. It must be cleaned after each use, which is more troublesome. The liquid storage effect is poor, and leakage is prone to occur.

Chinese Patent No. 201720751279.6 discloses a porous bamboo charcoal fiber sanitary napkin, which includes a non-woven bag. The inside of the non-woven bag is provided with two layers of dust-free paper, and a polymer absorbent is arranged between the two layers of dust-free paper. The resin layer is provided with a breathable film on the lower surface of the non-woven bag, and a perforated bamboo fiber non-woven fabric is provided on the upper surface of the non-woven bag. A through hole; a far-infrared negative ion magnetic chip layer is also arranged between the upper surface of the non-woven bag and the perforated bamboo fiber non-woven fabric. This kind of sanitary napkin is made of perforated bamboo fiber non-woven fabric to make it soft, skin-friendly, and not easy to cause allergies. However, its structure is relatively complicated, and its preparation process requires additional production equipment, and the preparation process is more complicated. The structure layer is equipped with a far-infrared negative ion magnetic chip, which is easily damaged by the roller during the production process and cannot play a practical role.

Summary of the invention

Therefore, in view of the above content, the present invention provides a method for preparing shea butter-added disposable absorbent articles, which solves the problem of the complicated production process of hygienic articles in the prior art and the contact of the hygienic articles obtained by the existing production method with the skin. It is easy to cause foreign body sensation and allergies after rubbing.

In order to achieve the above objective, the present invention is achieved through the following technical solutions: a method for preparing a disposable absorbent article added with shea butter, including preparing a liquid-permeable surface layer, preparing an absorbent body, and preparing a liquid-impermeable bottom layer, And the preparation step of combining the above-mentioned liquid-permeable surface layer, absorbent body, and liquid-impermeable bottom layer into one body, defining that the absorbent body has a longitudinal direction along the length direction and a transverse direction along the width direction, and the liquid-permeable surface layer The preparation includes the following steps:

1) Preparation of a hydrophilic non-woven fabric, the specific preparation steps of the hydrophilic non-woven fabric are:

a. Fiber chip spinning:

a1. In the spinning process, an oiling system is used to oil the silk thread. The oiling system includes a frame and an oil reservoir arranged on the frame. The oil reservoir is provided with an outlet through which the outlet passes The pipe is connected with a metering pump, the metering pump is provided with a plurality of spaced sealed chambers, each said chamber is filled with oiling agent, the bottom of each said chamber is provided with an outlet, and each outlet is connected with an upper Grease nipple, the silk thread passes under each grease nipple, and along the conveying direction of the silk thread, the oil agent filled in the last cavity is shea butter, and the weight of the shea butter accounts for 0.1-2% of the total oil dosage ；

a2. The silk thread obtained after a1 processing is sent to the winding machine for winding processing, stretching, crimping, drying, cutting and packaging processing;

b. Finishing and oiling after fiber formation:

b1. Mix and open the tow obtained in step a, and spray shea butter onto the loose fibers after mixing and opening;

b2, web-forming the fiber after b1 treatment;

b3. Reinforce and shape the fiber web after forming the net;

b4. The reinforced and formed fiber web is treated with shea butter by a roller coating method. The specific operation of the roller coating method is: a rubber roller is used as a transfer medium, and the shea butter is applied to the fiber web through the rubber roller;

c. The product obtained by the treatment in step b is passed through a non-woven fabric forming device to obtain a non-woven fabric, and then subjected to a hydrophilic treatment to obtain a hydrophilic non-woven fabric;

2) Spray or scrape the shea butter in the liquid state on the hydrophilic non-woven fabric, the amount of liquid shea butter is 0.125～0.3g/m ² ;

3) After step 2), apply cold air online to quickly dry the shea butter;

4) Compound the hydrophobic non-woven fabric online on both lateral sides of the hydrophilic non-woven fabric treated in step 3).

A further improvement is that the hydrophobic non-woven fabric is obtained through shea butter treatment, and its treatment method is less than the final hydrophilic treatment compared with the hydrophilic non-woven fabric.

A further improvement is that: the oil storage tank includes a first oil storage tank, a second oil storage tank, and a third oil storage tank that are arranged independently at intervals, and the third oil storage tank is filled with shea butter oil.

A further improvement is that: the metering pump is provided with 3 spaced sealed chambers, which are distributed into a first chamber, a second chamber and a third chamber, and the third chamber is filled with shea butter .

A further improvement is that the preparation steps of the shea butter are:

a. Crushing: use Shea Butter tree nuts as raw materials to crush and crush to 35-40 mesh;

b. Adjust the quality, adjust the squeezed water to less than 5%, and then pack the cake, 5-7kg per pack;

c. Squeezing: Place the cake on the baffle for the first pressing treatment. During pressing, the pressure is controlled at 40-50Mpa, the temperature is 60-70℃, and the residual oil of the first pressing cake is 18-23%. Repeat for 3 to 4 times. 10-13% of residual oil in cakes;

c. Precipitation and filtration: the crude oil containing residues obtained by the treatment in step b is insulated and precipitated and then filtered at 60-70°C;

d. Fine filtration: After fine filtration, shea butter with impurities <0.2% is obtained.

By adopting the aforementioned technical solutions, the beneficial effects of the present invention are:

1. In the preparation method of a disposable absorbent article added with shea butter of the present invention, the hydrophilic non-woven fabric of the liquid-permeable surface layer is added with shea butter during the preparation process, and the shea butter is in It is added after fiber spinning and fiber formation. After the hydrophilic non-woven fabric is made, the liquid state of shea butter is sprayed or scraped online. Shea butter is added three times during the preparation of the liquid-permeable surface layer. The staged oiling of shea butter has the following advantages: First, during the spinning process of fiber slices, a number of chambers are set in the metering pump, along the direction of the thread conveying, and the last chamber is filled with shea butter. , The silk thread goes through multiple oiling and the last oiling agent is shea butter, so that shea butter can be effectively applied to the surface of the silk thread. The use of multiple oil nozzles for oiling can avoid the mutual influence of various oils; secondly After the fiber is formed into a web, the finishing and oiling is divided into two stages. The first stage: spray shea butter in the mixed and opened tow; the second stage: roll coating on the reinforced and formed fiber web The shea butter treatment adopts two-stage oiling treatment to make the oiling of the fiber web more even.

2. After the hydrophilic non-woven fabric is sprayed or scraped on-line with shea butter, cold air is directly applied online to quickly dry it, so that the shea butter can be quickly dispersed on the hydrophilic non-woven fabric and quickly combined with the hydrophilic non-woven fabric. Combine fixed.

3. Further, the hydrophobic non-woven fabric arranged on both lateral sides of the hydrophilic non-woven fabric is also distributed with shea butter, that is, shea butter and shea butter are distributed on the liquid-permeable surface layer. Fruit oil is rich in triglycerides, free fatty acids and biologically active substances, mainly triterpene alcohols and sterols, which have the effects of healing wounds, anti-inflammatory, soothing irritation, moisturizing the epidermis and anti-aging and oxidation. Use it The liquid-permeable surface layer of the disposable absorbent article can reduce the friction with the skin when the disposable absorbent article is used, and improve the comfort of use.

Description of the drawings

Fig. 1 is a schematic structural diagram of an oiling system in an embodiment of the present invention.

Detailed ways

The implementation of the present invention will be described in detail below with reference to specific embodiments, so as to fully understand how the present invention applies technical means to solve technical problems and achieve the realization process of technical effects and implement them accordingly.

Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the reagents and products used are also commercially available. The source of the reagents used, the trade name, and those whose components are necessary to be listed are all indicated when they first appear.

Example

Referring to Figure 1, a method for preparing a disposable sanitary napkin with shea butter includes preparing a liquid-permeable surface layer, preparing an absorbent body, and preparing a liquid-impermeable bottom layer, and combining the liquid-permeable surface layer and the absorbent body , The liquid-impermeable bottom layer is compounded into an integrated preparation step, which defines that the absorbent body has a longitudinal direction along the length direction and a transverse direction along the width direction. The preparation of the liquid-permeable surface layer includes the following steps:

a. Fiber chip spinning:

a1. After the fiber slices are melted and extruded by the extruder, they are oiled, and the thread is oiled by an oiling system. The oiling system includes a frame 1 and an oil reservoir arranged on the frame 1 2. A metering pump 3 is provided below the oil reservoir 2. The oil reservoir 2 includes a first oil storage tank 21, a second oil storage tank 22, and a third oil storage tank that are independently arranged Tank 23. The first oil storage tank 21 is filled with smooth and soft oils, mainly polyol type surfactants, which can be model ATLASG1045, S-80; the second oil storage tank 22 is filled with emulsification Antistatic oils, mainly alkyl ether phosphates, can adopt models MC-470, Catanic, Victawt; the third oil storage tank 23 is filled with shea butter, and the first oil storage tank 21 , The bottom of the second oil storage tank 22 and the third oil storage tank 23 are both provided with outlets, and each outlet is communicated with a metering pump 3 through a conduit 6 which is provided with three spaced sealed chambers, Distributed into a cavity 31, a cavity 32, and a cavity 33. The cavity 31 is filled with a smooth and soft oil agent to choose from ATLASG1045, Span-60, S-80, and the cavity 32 is filled with an emulsified antistatic oil agent MC-470, Catanic, Victawt can be selected, the said cavity 33 is filled with shea butter, the bottom of each cavity is provided with an outlet, and each outlet is connected with a grease nipple 4, and each grease nipple 4 is provided with a quantity of oil Control switch 5, silk thread 7 passes under each oiling nozzle 4 in turn, along the conveying direction of silk thread 7, the last cavity, that is, the shea butter filled in cavity 33 is finally applied to the surface of the thread, shea butter The amount of oiling accounted for 1% of the total oil dosage;

b. Finishing and oiling after fiber formation:

b1, mixing and opening the tow obtained in step a, and spraying shea butter onto the loose fibers after mixing and opening;

b2, web-forming the fiber after b1 treatment;

b3. Reinforce and shape the fiber web after forming the net;

2) Spray the shea butter in a liquid state on the hydrophilic non-woven fabric, at this time the amount of liquid shea butter is 0.125g/m ² ;

3) After step 2), apply cold air online to quickly dry the shea butter;

4) The hydrophobic non-woven fabric is compounded online on both lateral sides of the hydrophilic non-woven fabric treated in step 3). The hydrophobic non-woven fabric is obtained through shea butter treatment. The treatment method is similar to that of the hydrophilic non-woven fabric. Compared with the preparation, the final hydrophilic treatment step is omitted, and the other steps are the same.

The preparation steps of the above-mentioned shea butter are:

①Crushing: use Shea Butter tree nuts as raw materials, pulverize, and pulverize to 35-40 mesh;

② Adjust the quality, adjust the squeezed water to less than 5%, and then pack the cake, each pack of 6kg;

③Squeezing: Put the cake on the baffle for the primary pressing process, the pressure during pressing is controlled at 40Mpa, the temperature is 60℃, the residual oil of the primary pressed cake is 18%, repeated 4 times, and the residual oil of the final pressed cake is 10%;

④ Precipitation and filtration: the crude oil containing residues obtained by the treatment in step ③ is insulated and precipitated and then filtered at 60°C;

⑤ Fine filtration: After fine filtration, shea butter with impurities <0.2% is obtained.

Among them, the shea butter of the present invention can also be applied to the liquid-permeable surface layer of baby diapers, adult diapers, and pull-up pants. It can be distributed only on the hydrophilic non-woven fabric of the surface layer, or only on the two surface layers. On the side of the leak-proof partition, or both at the same time.

In step a1, the weight of the shea butter accounts for 0.1 to 2% of the total oil dosage, and the liquid state of shea butter is sprayed on-line on the hydrophilic non-woven fabric. You can also use scraping instead of spraying. The upper liquid volume of shea butter is 0.125-0.3g/m ² , and the objective of the present invention can be achieved within the above-mentioned parameter range.

In the hydrophilic non-woven fabric online fire-scraping shea butter, you can use a disposable sanitary product hot-melt glue spray system to control the temperature within the melting point range, so that the shea butter can be fully contained in the glue tank and throat Flow, increase compressed air, and apply shea butter online in the form of spray or scrape to the top or side layer of disposable sanitary products. The spray/scrape surface is not limited to the use surface and the non-use surface. The amount of spray and scrape Controlled at 0.125～0.300g/m ² , so that the amount of liquid on the non-woven fabric is between 0.5～1.2%, in order to prevent shea butter from being sprayed and dried on-line and not affecting the product molding process in time, apply cold air on-line and air dry locally The upper liquid material, the material is cut and compounded, and made into disposable sanitary products.

The preparation method of the present invention can directly add shea butter oil to the existing sanitary napkin production line using a hot melt glue machine system, and add new functional technical points to the product. Shea butter oil is directly added to the product without passing through an intermediary carrier, reducing the amount of loss during intermediate processing and increasing economic benefits.

Test the sanitary napkins made by the preparation method of the present invention:

Verification of finished products of shea butter: Shea butter is a triglyceride composed of Oleic Acid and Octadecanoic acid stearic acid. Therefore, Shea Butter will break into oleic acid and hard when heated for desorption. Fatty acid. Using pyrolysis desorption GC/MS chromatograph: Py/TD-GC-MS to detect oleic acid and stearic acid signals in fiber samples, indicating that the fiber contains shea butter.

Specific implementation case effects of the sanitary napkin of the present invention:

① Trial survey: A product trial survey was conducted on 37 female consumers. Products containing shea butter oil had a higher tactile evaluation than products without additives, with shea butter containing 9 points and no shea butter containing 7 Points (the higher the score, the better the experience of use);

②Softness test: Shea butter non-woven fabric test result: the material with added shea butter is softer than the material without added shea butter.

The above records are only examples of using the content of this creation technology. Any modification or change made by this creation by a person familiar with this art belongs to the scope of the patent claims of this creation, and is not limited to those disclosed in the examples.

Claims

A method for preparing a disposable absorbent article added with shea butter, comprising preparing a liquid-permeable surface layer, preparing an absorbent body, and preparing a liquid-impermeable bottom layer, and combining the liquid-permeable surface layer, the absorbent body, and the liquid-impermeable bottom layer. The preparation step of the composite of the liquid bottom layer defines that the absorbent body has a longitudinal direction along the length direction and a transverse direction along the width direction. It is characterized in that the preparation of the liquid-permeable surface layer includes the following steps:

1) Preparation of a hydrophilic non-woven fabric, the specific preparation steps of the hydrophilic non-woven fabric are:

a. Fiber chip spinning:

a1. In the spinning process, an oiling system is used to oil the silk thread. The oiling system includes a frame and an oil reservoir arranged on the frame. The oil reservoir is provided with an outlet through which the outlet passes The pipe is connected with a metering pump, the metering pump is provided with a plurality of spaced sealed chambers, each said chamber is filled with oiling agent, the bottom of each said chamber is provided with an outlet, and each outlet is connected with an upper Grease nipple, the silk thread passes under each grease nipple, and along the conveying direction of the silk thread, the oil agent filled in the last cavity is shea butter, and the weight of the shea butter accounts for 0.1-2% of the total oil dosage ；

a2. The silk thread obtained after a1 processing is sent to the winding machine for winding processing, stretching, crimping, drying, cutting and packaging processing;

b. Finishing and oiling after fiber formation:

b1. Mix and open the tow obtained in step a, and spray shea butter onto the loose fibers after mixing and opening;

b2, web-forming the fiber after b1 treatment;

b3. Reinforce and shape the fiber web after forming the net;

b4. The reinforced and formed fiber web is treated with shea butter by a roller coating method. The specific operation of the roller coating method is: a rubber roller is used as a transfer medium, and the shea butter is applied to the fiber web through the rubber roller;

c. The product obtained by the treatment in step b is passed through a non-woven fabric forming device to obtain a non-woven fabric, and then subjected to a hydrophilic treatment to obtain a hydrophilic non-woven fabric;

2) Spray or scrape the shea butter in the liquid state on the hydrophilic non-woven fabric, the amount of liquid shea butter is 0.125～0.3g/m 2 ;

3) After step 2), apply cold air online to quickly dry the shea butter;

4) Compound the hydrophobic non-woven fabric online on both lateral sides of the hydrophilic non-woven fabric treated in step 3).
The preparation method of a disposable absorbent article added with shea butter according to claim 1, wherein the hydrophobic non-woven fabric is obtained through shea butter treatment, and its treatment method is the same as that of hydrophilic non-woven fabrics. Compared with the cloth, the final hydrophilic treatment is less.
The preparation method of a disposable absorbent article added with shea butter according to claim 1, wherein the oil storage device comprises a first oil storage tank and a second oil storage tank which are arranged at independent intervals. A tank and a third oil agent storage tank, and the third oil agent storage tank is filled with shea butter.
The preparation method of a disposable absorbent article added with shea butter according to claim 3, characterized in that: the metering pump is provided with three spaced-apart closed cavities, which are distributed as the first cavities, The second cavity and the third cavity are filled with shea butter.
The preparation method of a disposable absorbent article added with shea butter according to claim 1 or 2, wherein the preparation steps of the shea butter are:

①Crushing: use Shea Butter tree nuts as raw materials, pulverize, and pulverize to 35-40 mesh;

② Adjust the quality, adjust the squeezed moisture to less than 5%, then pack the cake, 5-7kg per pack;

③Squeezing: Put the cake on the baffle for the first pressing treatment, the pressure during pressing is controlled at 40-50Mpa, the temperature is 60-70℃, the residual oil of the first pressing cake is 18-23%, and the final pressing is repeated 3 to 4 times. Cake residual oil 10-13%;

④ Precipitation and filtration: the crude oil containing residues obtained by the treatment in step b is insulated and precipitated and then filtered at 60-70℃;

⑤ Fine filtration: After fine filtration, shea butter with impurities <0.2% is obtained.