WO2018119970A1

WO2018119970A1 - Recycling method, recycling system and water storage system for absorbent article

Info

Publication number: WO2018119970A1
Application number: PCT/CN2016/113335
Authority: WO
Inventors: 吴倍任
Original assignee: 清倍华再源技股份有限公司
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-07-05
Also published as: JP6960178B2; CN210082188U; JP2020514051A

Abstract

A recycling method and recycling system for materials from a used absorbent article, and a method for treating the used absorbent article. An absorbent article comprises an absorbent material, a fiber material, and a packaging material. The recycling method comprises: (a) washing away dirt on the used absorbent article with a first solution; (b) dehydrating the used absorbent article with a hypertonic solution; (c) crushing the used absorbent article; and (d) placing the crushed, used absorbent article in a second solution so as to recycle the materials on the basis of specific gravity of the materials. The recycling system comprises: a first tank that contains the first solution; a second tank that is connected to the first tank and contains the hypertonic solution; and used for containing the second solution and the dehydrated, crushed absorbent article that is placed in the second solution. The absorbent material, the fiber material and the packaging material are distributed, on the basis of respective specific gravity thereof, at different heights in the second solution, such that the absorbent material, the fiber material and the packaging material are recycled respectively. The method for treating the used absorbent article comprises: (1) washing away dirt on the used absorbent article with a first solution; and (2) dehydrating the used absorbent article with a hypertonic solution, to obtain a used absorbent article that has been washed and dehydrated by at least 18%.

Description

Absorbent article recycling method, recycling system and water storage system

Technical field

The invention relates to a recycling method, a recycling system and a water storage system. In particular, the present invention relates to a method for recovering an absorbent article, a recovery system, and a water storage system implemented in an absorbent article recovery program.

Background technique

Since the advent of disposable and disposable absorbent hygiene items (such as disposable diapers, sanitary napkins, etc.), users of all ages around the world have enjoyed the benefits of absorbent hygiene items such as: cheaper, It is easy to carry, easy to use, does not contaminate clothing, and is discarded after use, overcoming the shortcomings of traditional cloth-type absorbent articles that can be reused but must be washed away.

Taking baby diapers as an example, the material contacting the skin layer is non-woven fabric, the outer layer is a polyethylene film as a waterproof layer, and the middle is an absorbent layer including fluff pulp and sodium polyacrylate. The waist part of the adhesive baby diaper is designed with a sticky plastic material adhesive tape, and a special sewing design is provided in the underarm area to prevent the dirt from leaking from the side of the underarm. When the disposable diaper is to be discarded, the feces are wrapped in a disposable diaper, and the urine is absorbed into the absorbent layer, and the entire disposable diaper containing feces and urine is put into the trash can. Alternatively, the feces can be discharged into the toilet first, and the disposable diaper with urine can be put into the trash can.

It is estimated that around 6,000 tons of disposable diaper products are produced globally, and 2 million discarded disposable diapers are produced daily in Taiwan. As the global population ages, the amount of adult paper diapers increases. In addition to the two main absorbent hygiene items, adult diapers and baby diapers, absorbent hygiene items include sanitary napkins, sanitary pads, tampons, breast pads, and medical institutions. Products such as cleaning pads and nursing pads used by nursing agencies or homes. The above-mentioned absorbent hygienic articles are usually transported to an incinerator or a landfill with a garbage truck.

Absorbent hygienic articles used are stained with solid or liquid dirt from the human body such as feces, urine, body fluids or menstrual blood, and these absorbent hygienic articles usually contain locked in absorption Layer of liquid dirt. Since the absorbent hygienic article is made of a chemical material that is not easily decomposed, and the weight is greatly increased after use, the difficulty in clearing the absorbent sanitary article is increased. For example, absorbent hygienic articles containing moisture are difficult to burn in incinerators, and even lead to early maintenance of incinerators and shortened service life; and buried in landfills are still not easily decomposed and still carry moisture for a long time. In addition, the absorbent hygienic article itself has dirt and odor, and the user has no incentive to recycle the used absorbent hygienic article. Therefore, the vast majority of used absorbent hygienic articles do not enter the recycling system, but instead enter the incinerator or landfill with general waste.

In view of the deficiencies in the prior art, the applicant of the present case, after careful experimentation and research, and a perseverance spirit, finally conceived the case and can overcome the deficiencies of the prior art. The following is a brief description of the case.

Summary of the invention

In order to solve the disadvantage that the used absorbent sanitary article is difficult to be recycled and reused, the present invention first cleans the dirt on the absorbent sanitary article, and then dehydrates the absorbent sanitary article in the high-tension solution, and then breaks up the absorbent hygiene. The absorbent material, the fibrous material and the packaging material in the absorbent sanitary article are distributed according to their respective specific gravityes at different heights of the water body, and then the absorbent material, the fibrous material and the packaging material are separately recovered.

The invention discloses a method for recovering an absorbent article, the absorbent article comprising an absorbent material, a fiber material and a packaging material, the recycling method comprising: (a) cleaning the absorbent article with the first solution to remove the absorbent (b) soaking the absorbent article in the first high-tension solution to dehydrate the absorbent article; (c) breaking the dehydrated absorbent article in a container containing the second solution The absorbent material is deposited on the bottom of the container, the fibrous material is suspended at the bottom of the container, and the packaging material is suspended in the liquid level of the second solution; and (d) the absorbent material, the fibrous material, and the packaging material are recovered.

In certain embodiments, absorbent articles include, but are not limited to, disposable diapers, sanitary napkins, panty liners, tampons, breast pads, adult diapers, cleaning pads, care pads, and the like. In some embodiments, the absorbent material is sodium polyacrylate, the fibrous material is fluff pulp, and the packaging material comprises a polyethylene film; wherein the packaging material further comprises a plastic sheet or a nonwoven layer. In some embodiments, the first solution is water or a first high-tension solution, the second solution is water or a second high-tension solution, and the first high-tension solution and the second high-tension solution include, but are not limited to, an ionic solution. , a molecular solution, a sugar solution, a high-tension solution existing in a natural environment and having a solute. In some embodiments, the first solution comprises an agent to sterilize the use of the absorbent article. In certain embodiments, the weight percent of ions or molecules in the high-tension solution is greater than 0.1%.

The invention further discloses a recycling system for an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, and the recycling system comprises: first, second and third tank bodies. The first tank is for containing a first solution for cleaning the absorbent article to remove dirt on the absorbent article. The second trough body is coupled to the first trough body and is configured to accommodate a high-tension solution for soaking the absorbent article to dehydrate the absorbent article. The third tank is for containing the second solution and breaking the dehydrated absorbent article fed into the second solution. The absorbent material, the fibrous material and the packaging material are distributed at different heights in the second solution according to their respective specific gravity, so as to separately recover the absorbent material, the fibrous material and the packaging material.

The invention further discloses a water body storage system for storing the water body of the absorbent article after the recycling process, the absorbent article comprises an absorbent material, a fiber material and a packaging material, and the water body storage system comprises: first, second and third Storage tank. The first storage tank body is configured to store a first solution after cleaning the absorbent article, wherein the first solution contains dirt from the absorbent article. The second storage tank is used to store a high-tension solution that has been soaked through the washed absorbent article. The third storage tank is used to store the used second solution. The cleaned absorbent article is immersed in a high-tension solution and dehydrated, and the dehydrated absorbent article is crushed and then divided into an absorbent material, a fiber material and a packaging material in the second solution, and the absorbent material, the fiber material and the packaging material are The respective specific gravities are distributed at different heights in the second solution to separately recover the absorbent material, the fibrous material, and the packaging material.

The invention further discloses a recycling system for an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, the recycling system comprising a tank body, the tank body being configured to: accommodate a first solution, The first solution is used to clean the absorbent article to remove dirt on the absorbent article; after discharging the first solution and the dirt, the high-tension solution is accommodated, and the high-tension solution is used to soak the absorbent article so that Absorbent articles dehydrated; high in discharge The solution and the dehydrated absorbent article are broken to accommodate the second solution, and the broken absorbent article is placed in the second solution, and the absorbent material, the fibrous material and the packaging material are distributed in the second solution according to the respective specific gravity. Height to recover absorbent materials, fibrous materials, and packaging materials.

The invention further discloses a recycling system for an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, and the recycling system comprises two modes: a satellite mode and a unified processing mode. The satellite mode is a two-stage processing unit mode, the first stage is a cleaning, sterilization and dehydration unit and includes a first device configured to clean the absorbent article with the first solution to remove the absorbent article Dirty, then use the first high-tension solution to soak the absorbent article, dehydrate the absorbent article, and then use mechanical force to remove excess water from the dehydrated absorbent article, and then concentrate the dehydrated absorbent article and transport it to the first a two-stage processing unit, the second-stage processing unit is a crushing sorting unit and includes a second device configured to break the dehydrated absorbent article, placing the broken absorbent article in a second The solution, the absorbent material, the fibrous material and the packaging material are distributed at different heights in the second solution according to the respective specific gravity, so as to separately recover the absorbent material, the fibrous material and the packaging material.

The unified processing mode of the recycling system is also a one-stage processing unit mode, including cleaning, sterilization, dehydration and crushing sorting units. First, the absorbent article is washed with the first solution in the tank to remove dirt on the absorbent article. The absorbent article is then soaked in a high-tension solution to dehydrate the absorbent article, and the dehydrated absorbent article is placed in a tank containing the second solution. In the tank body, the absorbent material, the fiber material and the packaging material are distributed at different heights in the second solution according to the respective specific gravity, so as to separately recover the absorbent material, the fiber material and the packaging material.

The invention further discloses a method for recovering materials in an absorbent article, the material comprising an absorbent material, a fiber material and a packaging material, and the recycling method comprises: (a) cleaning the dirt on the absorbent article by using the first solution; (b) using a high-tension solution to dehydrate the used absorbent article; (c) dividing the broken dehydrated absorbent article into an absorbent material, a fibrous material, and a packaging material in the second solution; d) recovering at least one of the materials at different heights of the second solution depending on the respective specific gravity of the materials.

The invention further discloses a method for recovering materials in an absorbent article, comprising: (a) cleaning the dirt on the absorbent article with the first solution; (b) using the high-tension solution to absorb the absorbed material. Dehydration of the article; (c) breaking up using the absorbent article; and (d) placing the broken absorbent article in the second solution to recover the material. In some embodiments, steps (a), (b), and (c) may be varied according to factors such as the condition, quality, or quantity of the absorbent article, such as steps (a) → (b) → (c). , step (a) → (c) → (b), step (b) → (a) → (c), step (b) → (c) → (a), step (c) → (a) → ( b), and step (c) → (b) → (a).

The present invention further discloses a method of treating an absorbent article comprising: (a) cleaning the soiled material on the absorbent article with the first solution; and (b) using the high-tensioning solution to absorb the absorbent article The article is dehydrated to obtain a used absorbent article that has been cleaned and dehydrated by at least 18%.

DRAWINGS

1 is a schematic view showing the steps of washing and dehydrating a method for recovering an absorbent article of the present invention.

2 is a schematic view showing the separation step of the method for recovering an absorbent article of the present invention.

3 is a schematic view showing the dehydration rate of the absorbent article of the present invention after dehydration of different concentrations of the high-tension solution.

4 is a schematic view of the present invention for configuring an on-site cleaning and disinfecting unit and a sorting center to recover an absorbent article.

Figure 5 is a schematic diagram of a satellite mode recovery system of the present invention.

FIG. 6 is a schematic diagram of a recycling system of the unified processing mode of the present invention.

detailed description

The inventions set forth in the present invention will be fully understood from the following description of the embodiments, so that those skilled in the art to which the invention pertains will be able to carry out the invention. However, the implementation of the present invention is not limited by the following examples. Other embodiments of the invention can be derived from the spirit of the disclosed embodiments, which are within the scope of the invention.

The term "absorbent article", "absorbent article", "hygienic article" or "superabsorbent product" as used herein refers to, but is not limited to, adult diapers, baby diapers, sanitary napkins, sanitary pads, hygiene. Cotton tampon, anti-overflow breast pad, cleaning pad and nursing pad, etc., mainly consist of contact skin layer, intermediate absorption layer and outer layer. The foregoing article or product may be an unused article or product, or may be an article or product that is used, or may be an article or product that is used and that is soiled. Preferably, the article or product that is used or used and that is contaminated is the object of the material of the present invention that is intended to recover its material. However, those skilled in the art will appreciate that materials such as absorbent materials, fibrous materials, and packaging materials can also be recovered from unused articles or products by the recycling method of the present invention.

The term "contacting the skin layer" as used herein is composed of a water permeable material including, but not limited to, non-woven fabrics and the like. The term "intermediate absorbent layer" as used herein includes absorbent materials, fibrous materials, and the like. The term "outer layer" as used herein is composed of at least a water-impermeable material such as a packaging material. In the case of baby diapers, the outer layer also includes a plastic adhesive tape coated with an adhesive. In the case of female physiological products such as sanitary napkins and sanitary pads, the outer layer also includes a backing adhered to the outer layer and/or the outer layer of the leak-proof side.

The term "absorbent material" as used herein refers to a material composed of a superabsorbent polymer that absorbs liquids that are many times to hundreds of times greater than the mass itself, including but not limited to sodium polyacrylate. The term "fibrous material" as used herein includes, but is not limited to, fluff pulp, pulp, fiber, cellulose, or the like. The term "packaging material" as used herein includes, but is not limited to, a polyethylene film.

Please refer to FIG. 1 , which is a schematic diagram of the steps of cleaning and dehydrating the method for recovering an absorbent article of the present invention. In Fig. 1, a used absorbent article is diffused into a water body (for example, water or a high-tension solution) in the tank body 3, and washed and stirred to cause water absorption and swelling of the absorbent article to be used. When the absorbent article is also designed with a fastening tape (or adhesive), the user usually uses the adhesive tape (or adhesive tape) on the absorbent article to wrap the dirt in the absorbent article. The absorbent article used absorbs water in the water body and is washed and physically disturbed, and the adhesive tape attached to the absorbent article is easily released by the expansion pressure, and the adhesive tape is reduced in viscosity, so that the used adhesive tape is used. The dirt on the absorbent article is exposed to the body of water, and the used absorbent article is repeatedly washed with water. At this point, the washed absorbent article has no Dirty and odor.

In Figure 1, the aforementioned cleaning and physical perturbations are not intended to break the absorbent article. If the absorbent material, the fibrous material and the packaging material are dispersed in the water body in the washing step, it will be disadvantageous for subsequent recovery, but it can be implemented and finally recovered into the absorbent material, the fiber material and the packaging material.

Next, the washed absorbent article is diffused into the high-tension solution in the tank body 4 to cause the superabsorbent polymer to permeate, and the washed and water-swellable absorbent article is subjected to dehydration. The volume, weight or liquid weight of the dehydrated absorbent article will be less than the volume and weight of the absorbent article used and not treated by the present technology. The tank body 4 can further be provided with a device for outputting centrifugal force or pressure to increase the degree of dehydration of the washed absorbent article by centrifugal force or applied pressure, and even completely dehydrate the washed absorbent article. Due to the high ion concentration of the high-tension solution, common microorganisms (bacteria, mold, viruses, etc.) on the washed absorbent articles are also dehydrated to achieve bactericidal effects. The dehydrated absorbent article not only has a reduced volume, weight, but also no odor or microbial adhesion. The dehydrated absorbent article is concentrated in the collection tank 5, followed by subsequent processing, temporary storage or shipping.

Referring to FIG. 1 , the water body introduced into the tank body 3 may be tap water or ground water, which may be directly introduced into the tank body 3 via a water company pipeline or a subsurface pipeline, or may be stored in the water storage tank 1 (for example, a water tower or a water reservoir). And then introduce the tank body 3. Alternatively, a dispensing tank 2 connected to the tank body 3 may be provided, and the cleaning and disinfecting agent in the dispensing tank 2 is introduced into the tank body 3 via a line (not shown). Since the water body which has washed the absorbent article contains the dirt from the absorbent article, it is sent to the storage tank body 6 for storage, and is awaiting subsequent processing. Alternatively, the body of water that has been washed through the absorbent article can also be recycled back to the dispensing tank 2 for reuse. The high-bulk solution that has been bubbled through the cleaned absorbent article is transported from the tank 4 to the storage tank 10 for storage or disposal.

Alternatively, the tank body 3 and the tank body 4 can be integrated into a single tank body (not shown in FIG. 1), which can be equipped with a stirring device and a dewatering device for washing and stirring the absorbent article in the single tank body. The dehydration step; and can be connected to a storage tank (such as the storage tank 10 of FIG. 1) to store the washed, stirred solution and the used high-tension solution.

Please refer to FIG. 2 , which is a schematic diagram of a separation step of the method for recovering an absorbent article of the present invention. In Fig. 2, the dehydrated absorbent article in the collecting tank 5 is sent to the tank 7 for crushing. The crushing method includes, but is not limited to, crushing the dehydrated absorbent article by physical means such as stirring, impacting, crushing, cutting, grinding, shaking, tapping, drilling, etc., and then crushing the absorbent article and the solution (for example, a high-tension solution). Or water) mixed and further broken. Alternatively, the dehydrated absorbent article is immersed in the solution in the tank 7 and then broken by physical means including, but not limited to, agitation, impact, crushing, cutting, grinding, shaking, tapping, drilling, and the like. The absorbent material, the fibrous material, and the packaging material in the broken absorbent article are dispersed in the solution. Since the specific gravity of various materials in the broken absorbent article is different, the absorbent material, the fibrous material, and the packaging material are distributed at different heights in the solution according to their respective specific gravity after standing. Among them, the packaging material (such as polyethylene film) is bulky and small in specific gravity, and is easy to suspend on the surface of the solution. It can be recovered by using mechanical means to recover the packaging material; the fiber material is small in volume and easy to suspend, and it will be suspended in the solution, and it will be suspended. The settling time is increased and settled in the lower position of the solution, and the fiber material can be collected by using a filtering device such as a sieve; the absorbent material has a large specific gravity and is easily precipitated at the bottom of the solution, and the solution can be discharged out of the tank and simultaneously collected and absorbed by the filtering device. Sexual material. In this separation step, the absorbent material is usually precipitated in the form of a polyacrylate at the bottom of the solution. Non-woven fabrics and adhesive tapes are also easy to suspend on the surface of the solution due to their small specific gravity.

Alternatively, as shown in Fig. 2, the broken absorbent article further separates the material in the tank body 7 and the associated

tank bodies

8 and 9. Absorbent materials, fibrous materials and packaging materials are gradually distributed to different heights of the solution in a slowly flowing solution, and the packaging materials, fibrous materials and absorbents can be recovered in the

tanks

7, 8 and 9 respectively due to the slow flow of the solution. material. The solution used in the tank 7 or the solution used in the

tanks

7, 8 and 9 can be stored in the storage tank body 11, and then recycled after being subjected to water treatment.

The foregoing three

tanks

7, 8, and 9 are only examples, and those skilled in the art can adjust the number of the tanks 7-9 according to actual needs, or design the tanks 7-9 as continuous grooves. Body to recover specific materials in their respective tanks.

The high-tension solution used in the present invention includes, but is not limited to, ions, molecules (solutes), sugars, or high-solution solutions having a solute present in a natural environment, and the sugars include, but are not limited to, glucose, sucrose. A monosaccharide or a disaccharide or a polysaccharide sugar formed by combining monosaccharides. In certain embodiments, the weight percent (wt.%) concentration is greater than 0.1% The solution can be selected as a high-tension solution, and the high-tension solution can be recycled and reused.

Please refer to FIG. 3 , which is a schematic diagram of the dehydration rate of the absorbent article of the present invention after dehydration of different concentrations of the high-tension solution. In a specific embodiment, when the weight percentage (wt.%) is 1%, 10 g of the solute is dissolved in 1 liter of water, and similarly, it can be pushed to other concentration percentages, wherein the polymer in the absorbent article The absorbent material can be dehydrated via a difference in concentration. As shown in Fig. 3, when the concentration of dissolved matter in water is 1%, the unit dehydration rate of the absorbent material is about 60.0%; when the concentration of dissolved matter in water is 40%, the unit dehydration rate of the absorbent material is as high as 90.0. %. The concentration of the dissolved matter in water is 16% by weight, which is one of the optimal operating concentrations. The results in Figure 3 show that the use of a high-tension solution of the present invention effectively dewaters the washed absorbent article substantially.

When 30% by weight of sucrose and glucose solution are used as the high-tension solution, the unit dehydration rate of the absorbent material is 18% to 22%, indicating that the saccharide solution can also be used as a high-tension solution, and is effectively washed. The absorbent article is greatly dehydrated.

Please refer to FIG. 4 , which is a schematic diagram of configuring an on-site cleaning and disinfecting unit and a sorting center to recover an absorbent article according to the present invention. In the present invention, the absorbent article can be greatly reduced in weight, volume, and odor without being washed and dehydrated, so that the dehydrated absorbent article can be transported to other places for the crushing and recovery process. As shown in FIG. 4, the on-site cleaning and disinfecting

units

21, 22, 23, and 24 include, but are not limited to, a medical institution, a nursing home, a home, etc., and are configured with small tanks 3 and 4 (see the figure). 1), a single tank integrating the

tanks

3 and 4 or a tank body that meets the required capacity of the service population, and the on-site cleaning and disinfecting units 21 to 24 clean and dehydrate the collected absorbent articles according to the foregoing description. The dehydrated absorbent article is reduced in volume and weight without odor. Next, the dehydrated absorbent article is transported from the on-site cleaning and disinfecting units 21 to 24 to the sorting center 25 to crush and recover the material. Alternatively, if a uniform recycling site with a large scale and processing capacity, a medical institution, a care facility, or a home can directly combine 21 to 24 with 25, the collected absorbent articles are uniformly collected, and then washed and sterilized. , dewatering and crushing sorting units to separately recover absorbent materials, fibrous materials and packaging materials.

The absorbent article recovery system of the present invention can include two modes: a satellite mode and a unified processing mode. As shown in Figure 5, the satellite mode is a two-stage processing unit mode, the first of which The stage is the cleaning, sterilization and dehydration unit 30, and the second stage is the crushing and sorting unit 32. The first stage of the first device 31 is configured to clean the absorbent article with the first solution to remove dirt on the absorbent article, and then use the first high-tension solution to soak the absorbent article to dehydrate the absorbent article. Mechanical force is used to remove excess moisture from the dehydrated absorbent article. The dehydrated absorbent article is concentrated and transported to the second stage. The second stage 33 of the second stage is configured to break the dehydrated absorbent article, the broken absorbent article is placed in the second solution, and the absorbent material, the fibrous material and the packaging material are distributed according to the respective specific gravity in the second Different heights in the solution to separately recover absorbent materials, fibrous materials and packaging materials.

Please refer to FIG. 6, which is a schematic diagram of a recycling system for a unified processing mode of the present invention. In FIG. 6, the unified processing mode is also a one-stage processing unit mode including cleaning, sterilization, dehydration, and crush sorting unit 40. First, the absorbent article is washed with the first solution in the tank 41 to remove dirt on the absorbent article. The absorbent article is then soaked in a high-tension solution to dehydrate the absorbent article, and the dehydrated absorbent article is placed in the tank 41 containing the second solution. In the tank body 41, the absorbent material, the fiber material, and the packaging material are distributed at different heights in the second solution according to respective specific gravities to separately recover the absorbent material, the fiber material, and the packaging material.

In the method of recovering the material from the use of the absorbent article, the use of the first solution to clean the dirt on the absorbent article, the use of the high-tension solution to dehydrate the absorbent article, and the use of the absorbent article The order may vary according to factors such as conditions, quality or quantity of the absorbent article, such as washing→dehydration→crushing, washing→crushing→dehydration, dehydration→cleaning→crushing, dehydration→crushing→cleaning, crushing→cleaning→dehydration. Or crush → dehydration → cleaning. When the dehydration step of the high-tension solution is first carried out, since the high-tension solution also reduces the viscosity of the adhesive on the absorbent article or the plastic material adhesive tape is loosened, the dehydration step (disturbing the water body if necessary) will cause absorption. Sexual items are flat, dry, and not tightly wrapped. When the crushing process is first performed, the material in the absorbent article will be released into the second solution, and then the dehydrating step will cause the absorbent material to exist in the high-tension solution in a precipitated manner, and then the cleaning step removes the dirty matter. Recyclable materials can be recycled.

Example:

In the first phase, it is collected at the medical institution, nursing home or home. 100 pieces of diaper, then put into the washing tank, wash the diaper twice with 600L of water, and then discharge the waste water. The washed diaper absorbs a large amount of water and retains water due to the polymer absorbent material (sodium polyacrylate), 100 pieces. The volume of the diaper expands to 250L. Next, a sodium chloride high-tension solution having a dissolved weight percentage of 8% was added to dehydrate the polymer absorbent material. After physically squeezing to filter out moisture from the diaper, the volume and weight of 100 diapers were reduced to 1/20 of the diaper originally collected. That is, the volume is about 12.5 L and the weight is about 12.5 Kg.

In the second stage, the dewatered diaper is broken by a crushing device at the sorting center, and the broken diaper is sent to a tank containing a 8 wt.% sodium chloride high-tension solution. After the fluid is stirred by the high-tension solution, the packaging material (such as polyethylene film) suspended on the surface of the high-tension solution is first collected by using a filter device such as a filter screen, and the fiber material is subjected to a high-tension solution. The fluid is disturbed and suspended in the high-tension solution, and the filter material is used to collect the fiber material; finally, since the dehydrated polyacrylate has a heavier specific gravity and precipitates at the bottom of the tank, the high-tension solution is discharged from the tank to collect the absorbent material. The results showed that 100 pieces of the used diaper were finally recovered to obtain 0.8 kg of packaging material, 6.5 kg of fibrous material and 1.4 kg of absorbent material (polyacrylate).

In the present invention, the mass percent of the solutes used in both the high-tension solution used in the dehydration step and the high-tension solution used in the crushing/recovering step may be the same or different. The sodium chloride high-tension solution was used in the crushing/recovering step of the foregoing embodiment. In the crushing/recovering step, the dehydrated absorbent material is still in a dehydrated state in which the weight and volume are small in the high-tension solution, which facilitates recovery and storage of the recovered absorbent material. In the crushing/recovering step, the various materials to be recovered remain sterile and odor-free in the high-tension solution. However, it is also possible to use a general water body in the crushing/recovering step, in which the dehydrated absorbent material is volume-expanded, which facilitates collection of the absorbent material due to an increase in volume.

In summary, the present invention provides a method, a system, a water storage system, and an absorbent article removal and recovery structure for efficiently recovering an absorbent article, which can effectively wash away dirt on the recycled article and greatly reduce the recovery property. The articles are dehydrated to reduce the volume and weight of the recycled articles without odor, and the absorbent materials, fibrous materials and packaging materials are recovered from the materials according to the specific gravity of the materials. The absorbent article removal and recovery structure provided by the invention can be applied to the regulation On-site cleaning and disinfection units and sorting centers can be set up separately, or the on-site cleaning and disinfection unit and sorting center can be integrated into a device or equipment in a medical institution, nursing home or home. . The case belongs to the relevant technical field of green environmental protection. The absorbent materials, fibrous materials and packaging materials in the absorbent articles can be reused for the manufacture of absorbent articles or other articles using absorbent materials, fibrous materials or packaging materials after being recycled. It can greatly reduce the raw materials (such as tree felling), energy, water and electricity that are required to be produced from the raw materials to be made into absorbent materials, fiber materials and packaging materials, and also contribute to energy saving and carbon reduction.

The invention is a difficult and innovative invention, and has profound industrial value, thereby applying according to law. In addition, the present invention may be modified by those skilled in the art without departing from the scope of the appended claims.

Description of the reference numerals

1 water storage container

2 dispensing tank

3, 4, 7, 8, 9, 41 trough

5 collection tank

6, 10, 11 storage tank

20 Recycling Organizational Structure

21, 22, 23, 24 on-site cleaning and disinfection unit

25 Sorting Center

30 cleaning, sterilization and dehydration unit

31 first device

32 broken sorting unit

33 second device

40 cleaning, sterilization, dehydration and crushing sorting unit

Claims

A method for recovering an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, the recycling method comprising:

(a) washing the absorbent article with a first solution to remove dirt on the absorbent article;

(b) immersing the absorbent article in a first high-tension solution to dehydrate the absorbent article;

(c) breaking the dehydrated absorbent article, depositing the absorbent material in the bottom of the container in a container of the second solution, suspending the fibrous material at the bottom of the container, and Said packaging material suspended in the liquid level of said second solution;

(d) recovering the absorbent material, the fibrous material, and the packaging material.
The recycling method according to claim 1, wherein said absorbent article is selected from the group consisting of a disposable diaper, a sanitary napkin, a sanitary pad, a tampon, a breast milk pad, an adult diaper, a cleaning pad, and a care pad. one of them.
The recycling method according to claim 1, wherein said absorbent material is sodium polyacrylate, said fibrous material is fluff pulp, and said packaging material comprises a polyethylene film.
The recycling method according to claim 3, wherein said packaging material further comprises a plastic sheet or a non-woven layer.
The recycling method according to claim 1, wherein the first solution is one of water and a first high-tension solution, and the second solution is one of water and a second high-tension solution, and the first The high-tension solution and the second high-tension solution are each selected from the group consisting of an ionic solution, a molecular solution, a sugar solution, a high-tension solution present in a natural environment and having a solute, and a combination thereof.
A recycling system for an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, the recycling system comprising:

a first tank for accommodating the first solution, the first solution for washing the absorbent article to remove dirt on the absorbent article;

a second tank coupled to the first tank and configured to accommodate a high-tension solution, the high-tension a solution for soaking the absorbent article to dehydrate the absorbent article;

a third tank for containing the second solution and crushing the dehydrated absorbent article fed to the second solution,

Wherein the absorbent material, the fibrous material and the packaging material are distributed at different heights in the second solution according to respective specific gravity, so as to separately recover the absorbent material, the fibrous material and the packaging material. .
The recovery system of claim 6 wherein the weight percentage of ions or molecules in said high-tension solution is greater than 0.1%.
A recycling system for an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, the recycling system comprising:

The tank is configured to:

Storing a first solution for cleaning the absorbent article to remove dirt on the absorbent article;

Storing a high-tension solution after venting the first solution and the dirt, the high-tension solution for soaking the absorbent article to dehydrate the absorbent article;

Receiving a second solution after discharging the high-tension solution and the dehydrated absorbent article is broken, the broken absorbent article is placed in a second solution, the absorbent material, the fibrous material, and The packaging materials are distributed at different heights in the second solution according to respective specific gravity to separately recover the absorbent material, the fibrous material, and the packaging material.
A recycling system for an absorbent article, the absorbent article comprising an absorbent material, a fibrous material and a packaging material, the recycling system comprising:

The first device is configured to:

Cleaning the absorbent article with a first solution to remove dirt on the absorbent article;

Dehydrating the absorbent article using a high tension solution;

Removing excess water from the dehydrated absorbent article by mechanical force;

The second device is configured to:

Breaking the dehydrated absorbent article;

Disposing the broken absorbent article in a second solution, the absorbent material, the fibrous material and the packaging material are distributed at different heights in the second solution according to respective specific gravity, so as to separately recover the An absorbent material, the fibrous material, and the packaging material.
A method for recovering materials in an absorbent article, the material comprising an absorbent material, a fibrous material, and a packaging material, the recycling method comprising:

(a) cleaning the soil on the used absorbent article with a first solution;

(b) using a high-tension solution to dehydrate the used absorbent article;

(c) dividing, in the second solution, the broken dehydrated absorbent article into the absorbent material, the fibrous material, and the packaging material;

(d) recovering at least one of the materials at different heights of the second solution depending on the respective specific gravity of the materials.
The recycling method according to claim 10, wherein said first and second solutions comprise a medicament for disinfecting said used absorbent article.
A method of recycling materials in an absorbent article, comprising:

(a) cleaning the soil on the used absorbent article with a first solution;

(b) dehydrating the used absorbent article using a high-tension solution;

(c) breaking the used absorbent article;

(d) placing the broken absorbent article in the second solution to recover the material.
The recycling method according to claim 12, wherein the order of steps (a), (b) and (c) is selected from one of the group consisting of:

Step (a) → (b) → (c), step (a) → (c) → (b), step (b) → (a) → (c), step (b) → (c) → (a ), step (c) → (a) → (b), and step (c) → (b) → (a).
A method of treating an absorbent article, comprising:

(a) cleaning the soil on the used absorbent article with a first solution;

(b) using a high-tension solution to dehydrate the used absorbent article to obtain the used absorbent article that has been washed and dehydrated by at least 18%.