KR102525420B1 - Biodegradable capsules and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a biodegradable capsule including cleaning ingredients that can be used for washing laundry, dishwashers, washing machines and the like, and a method for manufacturing the same, wherein the biodegradable capsule has excellent biodegradability, excellent cleaning power, and excellent stain prevention effect compared to conventional biodegradable capsules. Furthermore, the biodegradable capsule does not contain CMIT, MIT, microplastics, and fluorescent whitening agents, thereby being usefully used in related detergent fields such as laundry capsules and the like.

Description

Biodegradable capsules and manufacturing method thereof {Biodegradable capsules and manufacturing method thereof}

The present invention relates to a biodegradable capsule containing cleaning components that can be used for washing laundry, dishwashers, washing tubs, and the like, and a method for manufacturing the same.

In a situation where awareness of environmental pollution is becoming a global concern, pollution caused by plastic packaging materials is receiving great attention. In the past, how strong and long-lasting synthetic plastics were used was the main focus of interest, but recently, the focus of research and development in academia and industry is on issues related to environmental friendliness rather than convenience, that is, thinking about the future of mankind and the earth rather than the temporary convenience of materials. is becoming

In particular, movements toward the development and commercialization of degradable plastics are actively underway, and the growing interest in polyvinyl alcohol (PVA), a synthetic water-soluble polymer widely used worldwide, is also a key factor in this eco-friendly material research. It forms a single flow.

On the other hand, detergents are used for the purpose of washing the body in daily life or washing away oil stains, dust, soot, etc. of various things such as textile products and tableware. In addition, the use can be classified into cosmetic, household, industrial detergent, etc., and the detergent form that constitutes the mainstream of current detergent is powder or liquid. These powdery and liquid detergents are inconvenient because they must be weighed each time they are used, and it is difficult to use a fixed amount when measuring and there is a risk of spillage, which causes waste of detergent.

Accordingly, detergents in which detergents are filled and sealed inside the capsules are commercially available, but the film components constituting the capsules are not biodegradable or have low biodegradability, so the risk of environmental contamination increases as the amount of use increases. In-depth research on detergents is required.

Republic of Korea Patent Registration No. 10-1358405

The inventors of the present invention developed a capsule-type detergent with excellent cleaning and color transfer prevention effects while being excellent in biodegradability during research and development on detergents that have excellent cleaning effects and are beneficial to the environment.

Accordingly, the present invention provides a biodegradable capsule containing specific ingredients and a method for manufacturing the same.

In order to achieve the object of the present invention, the present invention provides a biodegradable capsule,

The component of the capsule is PVA (polyvinyl alcohol),

wherein the capsule contains two or more cleaning ingredients inside the capsule;

The two or more cleaning components provide a biodegradable capsule that exists in a separate state inside the capsule.

In one embodiment of the present invention, the capsule may further contain an extract of Callophyllis japonica.

In one embodiment of the present invention, the concentration of the callophyllis japonica extract may be 4.5 to 5.5 g/L.

In one embodiment of the present invention, the cleaning component may be selected from the group consisting of cleaning enzymes, surfactants, fabric softeners, disinfectants, fragrances, and combinations thereof.

In one embodiment of the present invention, the washing enzyme may include amylase, protease, pectinase, mannase, lipase, cellulase and EM enzyme.

In addition, the present invention is a) injecting and sealing so that two or more cleaning components can be separately present inside a PVA (Polyvinyl Alcohol) capsule;

b) applying Callophyllis japonica extract to the outside of the capsule of step a);

c) drying the capsules of step b) for 1 to 3 hours; and

d) providing a method for producing a biodegradable capsule comprising the step of repeating steps b) and c) two more times.

The present invention has excellent biodegradability compared to conventional biodegradable capsules, excellent cleaning power, and excellent anti-coloring effect. Furthermore, since it does not contain CMIT, MIT, microplastics, and optical whitening agents, it can be usefully used in the field of detergents such as laundry capsules.

1 is a report that CMIT and MIT were not detected in the detergent included in the capsule of the present invention.
2 is a report that microplastics were not detected in the capsule of the present invention.
Figure 3 is a report that the capsule of the present invention has a bactericidal activity against Staphylococcus aureus.
Figure 4 is a report that the fluorescent whitening agent was not detected in the detergent included in the capsule of the present invention.

The inventors of the present invention developed a capsule-type detergent with excellent cleaning and color transfer prevention effects while being excellent in biodegradability during research and development on detergents that have excellent cleaning effects and are beneficial to the environment.

Accordingly, the present invention is a biodegradable capsule,

The component of the capsule is PVA (polyvinyl alcohol),

wherein the capsule contains two or more cleaning ingredients inside the capsule;

The two or more cleaning components provide a biodegradable capsule that exists in a separate state inside the capsule.

In the present invention, the biodegradation means that organic substances released into the environment are decomposed by microorganisms, and the type of microorganisms is not limited.

In the present invention, the capsule is a concept including a container for containing a substance, and the shape or thickness of the capsule is not limited.

In the present invention, PVA (polyvinyl alcohol) is an English abbreviation for polyvinyl alcohol, and is a representative water-soluble synthetic polymer, and can be easily purchased commercially.

In the present invention, the washing component is a concept including substances that serve to remove contaminants such as detergents and bleaches, as well as cleaning aids such as fabric softeners and fragrances, and components that can be expected to have a synergistic effect with the washing components.

In the present invention, the washing component may exist in a separated state inside the capsule, and as an example, compartments may be divided inside the capsule and cleaning components may be separately sealed for each compartment. As a method of dividing the compartments, heat compression may be used, but is not limited thereto.

In the present invention, the capsule may further contain Callophyllis japonica extract. Crested red leaves belong to the family Calimeniaceae, and are widely distributed in the southern coastal area of Korea and can be consumed as food. According to a previously reported bar, crested red leaf is known to have a protective effect against radioactive irradiation to mice, and is known to have antioxidant and antibacterial effects, but the washing-related effect is not known at all.

In the present invention, it was confirmed that the biodegradability of the capsule was significantly improved through the treatment of the red leaf extract, as well as the improvement in cleaning ability and the effect of preventing dye transfer (see Examples 2 to 4).

In the present invention, the concentration of the callophyllis japonica extract may be 4.5 to 5.5 g/L, preferably 5 g/L. If the concentration of the extract is less than 4.5 g/L, the effect is insignificant due to the low extract content, and if the concentration is greater than 5.5 g/L, the extract may deteriorate the texture of the laundry.

In the present invention, the cleaning component may be selected from the group consisting of cleaning enzymes, surfactants, fabric softeners, disinfectants, fragrances, and combinations thereof.

In the present invention, the washing enzyme may include amylase, protease, pectinase, mannase, lipase, cellulase and EM enzyme.

The EM stands for Effective Micro-organisms, which means useful microorganisms. EM is not a special microorganism, but a complex microbial population in which microorganisms that have a function of purifying the natural world or synthesizing and producing useful substances are cultured among microorganisms reproductively distributed in the natural world. In general, it contains about 80 kinds of microorganisms such as yeast, lactic acid bacteria, aspergillus, photosynthetic bacteria, and actinomycetes, and is known to have excellent effects on odor removal, water purification, prevention of oxidation of metals and food, and leftover food fermentation.

In another aspect, the present invention provides a) injection and sealing so that two or more cleaning components can be separately present inside a PVA (Polyvinyl Alcohol) capsule;

b) applying an extract of Callophyllis japonica to the outside of the capsule of step a);

c) drying the capsules of step b) for 1 to 3 hours; and

d) providing a method for producing a biodegradable capsule comprising the step of repeating steps b) and c) two more times.

Injection and sealing of the cleaning component may be applied by a conventional method in the art.

In the present invention, uniform application is possible through repeated application of Callophyllis japonica extract to the outside of the capsule three times, and sufficient function can be exerted during washing.

Furthermore, the present invention does not contain CMIT, MIT, microplastics and fluorescent whitening agents. Methylchloroisothiazolinone (CMIT) and methylisothiazolinone (MIT) are designated as Class 2 inhalation toxic substances in the United States and designated as toxic substances in Korea. Microplastics are problematic in terms of environmental pollution and accumulation in the human body, and fluorescent whitening agents can cause skin diseases. Therefore, the capsule of the present invention without the above components is useful for washing clothes, washing dishes, and the like.

Hereinafter, a preferred embodiment is presented to aid understanding of the present invention. However, the following examples are provided to more easily understand the present invention, and the content of the present invention is not limited by the following examples.

<Example>

<Example 1: Preparation of biodegradable capsules>

Filling of cleaning ingredients

10ml of washing enzyme, 10ml of highly concentrated detergent, and 5ml of fabric softener were filled and heat-sealed so as to remain separate from each other in a polyvinyl alcohol (PVA) capsule having an empty inside.

The washing enzyme was used by adding the remaining amount of EM enzyme (Seojin Bio) to 1 ml each of commercially available amylase, protease, pectinase, mannase, lipase, and cellulase, and the highly concentrated detergent was sodium polyacrylate 35 weight %, 5% by weight of nonionic surfactant, 6% by weight of triethanolamine citrate salt, 5% by weight of propylene glycol, 0.4% by weight of Alcalase, and the remaining amount of water were added, and the fabric softener was a cationic surfactant (TEA Ester Quaternary) 5 wt%, citric acid 10 wt%, fragrance 0.5 wt%, ethanol 5 wt%, fragrance solubilizer 5 wt%, antifoaming agent 0.05 wt%, and vegetable glycerin 10 wt% The remaining amount of water was added.

Manufacture of crested red leaf extract

Callophyllis japonica was collected from Wando and washed three times with fresh water to remove seawater. After drying the washed seaweed in a dryer at 90 ° C. for 24 hours to remove moisture, it was made into powder using a blender. 100 g of seaweed powder was added to 900 ml of 70% ethanol, stirred, and filtered through 3MM filter paper on the second day to obtain an extract. The obtained extract was concentrated using a vacuum concentrator, and then all solvents were removed using a lyophilizer to obtain a powdered extract. The obtained extract was dissolved in ethanol at a concentration of 5 g/L and used.

capsule coating

The Crested Red Leaf extract was applied to the filled and sealed biodegradable capsule. The process of drying in a cool place for 2 hours after application was repeated three times.

<Example 2: Confirmation of biodegradability enhancement of the present invention>

KS M prepared based on the international standard ISO 14855: 1999 Determination of the ultimate aerobic biodegradability and disintegration of plastic materials under controlled composting conditions-Method by analysis of evolved carbond dioxide to confirm the biodegradability of the biodegradable capsules of the present invention under aerobic composting conditions 3100-1: 2003 (Composting - Measurement of aerobic biodegradability and disintegration of plastics under composting conditions - Part 1: Quantification of carbon dioxide generated by titration) as a method of measuring the amount of carbon dioxide generated during aerobic composting. The test was performed, and the degree of decomposition of the sample was calculated by measuring the conversion rate and conversion rate of carbon to carbon dioxide under conditions in which temperature, entrained air, and humidity were controlled.

Samples were prepared according to Example 1, but capsules (Sample 1) and biodegradable capsules (Sample 2) of Example 1, but not coated with the Crested leaf extract, were used.

Degradability in soil under composting conditions was measured by the Biodegradability System (JSBDT-24). As an inoculum, fully matured and stabilized compost made from the composting of municipal solid waste was used, the sample was mixed with the inoculum and fixed, then placed in a composting container, and composted under conditions of controlled moisture content, temperature, and oxygen for a test period of 42 days. was performed to occur.

Carbon dioxide, water, inorganic salts, and the amount of newly generated microorganisms generated from the sample are final biodegradation products, and the amount of carbon dioxide generated was measured continuously or periodically. The degree of biodegradability was determined by the ratio of the theoretical carbon dioxide generation amount of the sample and the carbon dioxide amount generated from the actual sample, and the maximum theoretical amount of carbon dioxide generation was calculated from the total organic carbon content of the material.

On the other hand, among the carbon converted into microorganisms, the amount of carbon that was not released as carbon dioxide through metabolism during the test period was not included in the biodegradability, and was separately applied to the actual soil environment to compare the correlation with the degradability in the actual soil. to conduct the experiment.

For the compost, general agricultural by-product compost was used, the depth of the pit was 20 cm, and the height of the compost was 10 cm. Morphological conditions and thermal characteristics were observed for 42 days.

Biodegradability was calculated using Equations 1 and 2 below.

[Equation 1]

M _TOT : Amount of total dry solids in the sample added to the compost at the start of the test (g)

C _TOT : ratio of organic carbon contained in the total dry solids of the sample (g/g)

44 and 12: molecular weight of carbon dioxide and atomic weight of carbon

[Equation 2]

(CO ₂ ) _T : cumulative amount of carbon dioxide generated from the composting container containing the sample (g)

(CO ₂ ) _B : average (g) of accumulated carbon dioxide from the inoculum container

ThCO ₂ : theoretical amount of carbon dioxide produced by the sample in the vessel (g)

processing day 7 14 21 28 35 42 Accumulated biodegradability (%) sample 1 6% 12% 17% 20% 23% 26% sample 2 8% 17% 24% 35% 45% 51%

As shown in Table 1, it was confirmed that the capsules coated with the Crested leaf extract of the present invention had significantly better biodegradability than those not coated.

<Example 3: Confirmation of enhancement of detergency of the present invention>

In order to confirm the cleaning power enhancement of the present invention, a composition in which the cleaning enzyme, highly concentrated detergent and fabric softener of Example 1 were mixed (Sample 1), and a capsule prepared by the method of Example 1 but not coated with the C. and a capsule (sample 3) prepared by the method of Example 1 was prepared.

In the experiment, artificially soiled clothes, 50 L of water at 25 ° C., and samples 1 to 3 were put into a centrifugal washing machine, washed for 10 minutes, and then rinsed twice for 3 minutes. The detergency was calculated and evaluated according to the following formula according to a general method.

[Equation 3]

Detergency (%) = {(Rw-Rs)/(RI-Rs)} × 100

RI is the reflectance of the unsoiled garment, Rw is the reflectance of the washed garment and Rs is the reflectance of the soiled garment. Reflectance at 540 mn was measured using a multi-light source spectrophotometer calorimeter.

division sample 1 sample 2 sample 3 Detergency (%) 40 67 82

As shown in Table 2, it was confirmed that the sealed sample (Sample 2) with the washing enzyme, highly concentrated detergent and fabric softener separated had significantly better cleaning power than the sample (Sample 1) in which the above ingredients were mixed. In particular, it was confirmed that the sample (Sample 3) coated with the Crested red leaf extract had significantly better detergency compared to other samples.

<Example 4: Confirmation of the effect of preventing color transfer of the present invention>

Samples 1 to 3 were prepared as in Example 3 to confirm the effect of preventing transfer of dye of the present invention.

The same size jeans of the same brand sold in the market and a white cotton T-shirt of the same brand sold in the market were prepared, and one pair of jeans and one pair of white cotton T-shirts per test set were put together in a common household washing machine, samples 1 to 3 20 ml of any one of them was added and washed with lukewarm water (about 40 degrees) for 50 minutes and dehydrated for 10 minutes. After drying for 1 hour and 30 minutes using a household electric dryer, a photo was taken of the washed and dried white cotton T-shirt using a color reference (SpyderCHECKR®24) for calibration under the same indoor lighting environment. The obtained image is calibrated, the L, a, and b values of the cotton T-shirt part are measured, and the color difference (ΔE ^* _ab value) is obtained by substituting the L, a, and b values of the cotton T-shirt image before washing into the following formula 1 did The average value was calculated by performing the same test three times per sample (P<0.05).

[Equation 4]

In Equation 4, L ^* ₂ is the surface reflectance of the cotton T-shirt after washing, L ^* ₁ is the surface reflectance of the cotton T-shirt before washing, a ^* ₂ is the redness/greenness of the cotton T-shirt after washing, and a ^* ₁ is the washing The redness/greenness of the back cotton T-shirt, b ^* ₂ is the yellowness/blueness of the cotton T-shirt before washing, and b ^* ₁ represents the yellowness/blueness of the cotton T-shirt before washing. The higher the value of ΔE ^* _ab means that more migration occurs.

Usually, when the color difference value is 2 or less, it can be seen that the color difference is in a range that is difficult to perceive with the naked eye, values of 2 to 3 are barely perceptible to the naked eye, and 3 to 8 are slightly perceptible to the naked eye. A value of 8 or higher can be regarded as a degree that can be clearly recognized.

division sample 1 sample 2 sample 3 Color difference (ΔE ^* _ab ) 7.6 2.8 1.5

As shown in Table 3, it was confirmed that the sealed sample (Sample 2) with the cleaning enzyme, highly concentrated detergent and fabric softener separated had a significantly better anti-discoloration effect than the sample (Sample 1) in which the above components were mixed. In particular, it was confirmed that the sample (Sample 3) coated with the Crested red leaf extract had a remarkably excellent anti-discoloration effect compared to other samples.

Claims (6)

In the biodegradable capsule,
The component of the capsule is PVA (polyvinyl alcohol),
wherein the capsule contains two or more cleaning ingredients inside the capsule;
The two or more cleaning components exist in a separated state inside the capsule,
The capsule is a biodegradable capsule further comprising an extract of Callophyllis japonica.
delete The biodegradable capsule according to claim 1, wherein the concentration of the Callophyllis japonica extract is 4.5 to 5.5 g/L.

The biodegradable capsule according to claim 1, wherein the cleaning component is selected from the group consisting of cleaning enzymes, surfactants, fabric softeners, disinfectants, perfumes, and combinations thereof.
The biodegradable capsule according to claim 4, wherein the washing enzyme includes amylase, protease, pectinase, mannase, lipase, cellulase and EM enzyme.
a) injecting and sealing so that two or more cleaning components can be separately present inside a PVA (Polyvinyl Alcohol) capsule;
b) applying an extract of Callophyllis japonica to the outside of the capsule of step a);
c) drying the capsules of step b) for 1 to 3 hours; and
d) a method for producing a biodegradable capsule comprising the step of repeating steps b) and c) two more times.

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