Note: Descriptions are shown in the official language in which they were submitted.
SOLID DETERGENT
BACKGROUND
1. Field of the Invention
The present invention relates to a solid detergent with excellent environment-
friendliness and improved disintegrability and detergency.
2. Discussion of Related Art
Surfactants have hydrophobic groups and hydrophilic groups, which can lower
the interfacial tension of liquids, and are contained as an essential
component to
prepare soap, synthetic detergent or cosmetics while being well mixed and
dissolved
in both oil and water.
Surfactants include natural surfactants and synthetic
surfactants, and since synthetic surfactants are cheap and have strong
detergency,
synthetic surfactants are generally used in daily life.
However, a synthetic surfactant has strong detergency, which not only
contaminates but also weakens skin lipids, and thus lowers a skin barrier
function.
For this reason, the penetration of a foreign substance into skin is
facilitated, and the
moisture in the skin is easily evaporated, so that dry skin and wrinkle
formation are
promoted, leading to rapid progression of aging.
In addition, the stability of a builder, a preservative, and an artificial
fragrance,
which have been pointed out as causative materials causing various skin
allergies,
dermatitis, etc., and are added to increase the function of a detergent
manufactured
using a synthetic surfactant, is not verified and thus easily exposed to
potential ha7ards.
In other words, products including a synthetic surfactant have only focused on
the
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ability of removing pollutants, and aspects such as skin health and
environmental
protection are not considered at all.
To improve disadvantages of a synthetic surfactant, recently, products
including a natural surfactant have been needed and therefore developed.
However,
the natural surfactant can be highly influenced by external environments, and
thus it is
difficult to be stored, more expensive than a synthetic surfactant, makes less
bubbles.
For this reason, such products may have difficulty in stimulating the
purchasing power
of consumers.
Meanwhile, a kitchen detergent is generally used in the form of a liquid, and
a
liquid kitchen detergent has a large weight and a large mass, so that it is
difficult to be
carried or stored. In addition, such a liquid kitchen detergent is
generally
administered one time to a tool or object for cleaning before complete
cleaning, and
most of the applied detergent is consumed at the beginning of cleaning, and
therefore,
it is difficult to maintain detergency in the whole process of cleaning, and
when the
number of applications of the detergent during cleaning is increased to
maintain
detergency, more detergent than necessary is used, which is disadvantageous in
terms
of economic feasibility and environment friendliness.
In addition, since a kitchen detergent is directly in contact with the skin of
a
user during use, after use, it may remain on the skin, thereby causing a skin
disease,
and when the kitchen detergent remains on a dish, the detergent ingredient may
be
directly administered through the mouth of a user, and adversely affect health
and
hygiene.
Therefore, although a solid-type kitchen detergent was developed, since it is
easily contaminated since it is exposed to external environments until
completely
consumed after use, bacterial proliferation is facilitated and therefore,
hygienic
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management can be difficult. In addition, according to use, the size of the
solid-type
kitchen detergent is reduced, and thus a user may feel inconvenience during a
bubbling
process.
For this reason, there is a demand for developing a solid detergent which
contains a natural surfactant and thus has excellent environmental
friendliness and
improved disintegrability and detergency.
SUMMARY OF THE INVENTION
The present invention is directed to providing a solid detergent with
excellent
environmental friendliness and improved disintegrability and detergency.
In one aspect, the present invention provides a solid detergent, which is
manufactured by compressing a mixture including 20 to 40 wt% of a sodium
lauryl
sulfoacetate powder; 50 to 70 wt% of a sugar powder; and 1 to 10 wt% of a
sodium
hydrogen carbonate powder, into tablets.
In one exemplary embodiment, a moisture content of the mixture may be 6 wt%
or less.
In one exemplary embodiment, the sugar powder may include dextrose powder.
In one exemplary embodiment, the sugar powder may further include sucrose
powder.
In one exemplary embodiment, a content of the sucrose powder among the
sugar powder may be 20 to 80 wt%.
In one exemplary embodiment, the sucrose powder may be porous particles.
In one exemplary embodiment, the porous particles may have a porosity of 20
to 80 vol%.
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In one exemplary embodiment, the mixture may have an apparent density of
0.5 to 1.5g/cc, and the solid detergent may have an apparent density of 1.51
to 3.0g/cc.
In one exemplary embodiment, the solid detergent may have a diameter of 7
to 30 mm.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and advantages of the present invention
will become more apparent to those of ordinary skill in the art by describing
in detail
exemplary embodiments thereof with reference to the accompanying drawings, in
which:
FIG. 1 is the particle size distribution curve of a sodium lauryl sulfoacetate
powder according to an exemplary embodiment of the present invention;
FIG. 2 is the particle size distribution curve of a dextrose powder according
to
an exemplary embodiment of the present invention;
FIG. 3 is the particle size distribution curve of a sodium hydrogen carbonate
powder according to an exemplary embodiment of the present invention;
FIG. 4 is the result of measuring the apparent density of a powder mixture
according to an exemplary embodiment of the present invention; and
FIG. 5 is the result of measuring the apparent density of a solid detergent
according to an exemplary embodiment of the present invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
Hereinafter, the present invention will be described in detail with reference
to
the accompanying drawings. However, the present invention may be embodied in a
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variety of different forms, and thus, is not limited to the examples to be
described
below.
In addition, throughout the specification, when one part "includes" a
component, it means that it may also include other components instead of
excluding
the other components unless particularly stated otherwise.
One aspect of the present invention provides a solid detergent, which is
manufactured by compressing a mixture including 20 to 40 wt% of a sodium
lauryl
sulfoacetate powder; 50 to 70 wt% of a sugar powder; and 1 to 10 wt% of a
sodium
hydrogen carbonate powder, into tablets.
Generally, a detergent may include a surfactant and thus can serve to remove
an oil stain when dissolved in water. An interface refers to the boundary
between a
gas and a liquid, a liquid and a liquid, or a liquid and a solid, and a
surfactant may have
hydrophilic groups at one side of the molecule and hydrophobic groups at the
other
side thereof, thereby lowering the surface tension of the interface and thus
mitigating
an interfacial boundary.
When the surfactant molecules in cleaning are contained at a predetermined
concentration or more, micelles, which are aggregates in which hydrophobic
groups
are present inside and hydrophilic groups are present outside, are formed. The
hydrophobic groups that are aggregated in the micelle may attract an oil stain
contaminating an object to be cleaned into the micelle, and in rinsing, the
oil stain may
be removed by water.
Conventional detergents include low-cost synthetic surfactants with excellent
detergency, and representatively, a sulfate series such as sodium lauryl
sulfate, sodium
laureth sulfate, ammonium lauryl sulfate, and ammonium laureth sulfate are
widely
used.
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The sulfate-based surfactant is cheap and has excellent detergency without
being highly affected by an external environment. However, when a sulfate-
based
product is used for a long time, it may be transformed into 1,4-dioxine in the
body,
and accumulated as a carcinogen, resulting in various types of skin diseases
and
functional disorders.
Therefore, as the solid detergent includes a natural surfactant, environmental
friendliness and a skin protection effect may be realized, and by including a
sugar =
powder and a sodium hydrogen carbonate powder, detergency may be enhanced.
The solid detergent may include a sodium lauryl sulfoacetate powder. The
sodium lauryl sulfoacetate is a coconut-derived anionic natural surfactant,
which is
used in foam baths, shampoos, or cleansing products because of less skin
irritation,
abundant bubbles and excellent detergency.
Particularly, the Skin Deep Score according to an EWG rating is evaluated as
1, indicating that skin stability is very excellent. In addition, it may
maintain a stable
formulation when being mixed with another surfactant, and thus may be applied
to
various products.
The term "EWG rating" used herein refers to a cosmetic ingredient hazardous
rating announced by Environmental Working Group (EWG), which is a US non-
profit
environmental NGO, and specifically, EWG classifies the hazards of cosmetic
ingredients into 1 to 10 grades through thorough investigation, and the first
and second
grades are determined as safe grades.
Meanwhile, a content of the sodium lauryl sulfoacetate powder may be 20 to
40 wt% based on the total weight of the solid detergent. When the content of
the
sodium lauryl sulfoacetate powder is less than 20 wt%, detergency may be
lowered,
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and when the content of the sodium lauryl sulfoacetate powder is more than 40
wt%,
moisturizing power may be lowered.
The solid detergent may include a sugar powder. The sugar powder may be
one selected from the group consisting of a monosaccharide, a disaccharide and
a
combination thereof, preferably, a glucose powder, and more preferably, a
dextrose
powder.
The monosaccharide is a basic unit of a carbohydrate consisting of one sugar
which is no longer hydrolyzed by an acid, a base or an enzyme, is a colorless
crystal,
water-soluble, and is not dissolved in ether or ethanol. In
addition, the
monosaccharide is divided into various types according to a carbon number. The
most abundant monosaccharide in nature is a hexose, and the types of a hexose
include
glucose, fructose, and galactose.
The disaccharide is formed when two monosaccharides are joined, and the
types of the disaccharide include sucrose, maltose, and lactose. A mixture
thereof,
that is, a polysaccharide, may be formed by joining many monosaccharides in
the form
obtained when energy is stored or a structure is formed in an animal and a
plant. The
polysaccharide may be classified into digestible starch and glycogen and non-
digestible cellulose.
A content of the sugar powder may be 50 to 70 wt% based on the total weight
of the solid detergent. When the content of the sugar powder is less than 50
wt%,
detergency may be lowered, and when the content of the sugar powder is more
than
70 wt%, more sugar powder than necessary is contained because no higher effect
can
be realized.
Meanwhile, the sugar powder is dissolved in water in cleaning such that a
pollutant is attached to the sugar molecule and removed, resulting in
realization of a
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synergistic effect with the sodium lauryl sulfoacetate and maximizing
detergency. In
addition, the sugar powder may be decomposed by microorganisms after cleaning,
thereby realizing excellent environmental friendliness and an effect of
protecting the
skin of a user. Since the sugar powder has high solubility and reactivity when
it is a
monosaccharide, the sugar powder may be a monosaccharide, and preferably, a
glucose powder.
The glucose is produced by hydrolyzing corn starch by heat, an acid and an
enzyme, and generally, known as glucose, present as a hexagonal ring having an
aldehyde group. There are two types of optical isomers of glucose, that is, a
D-form
and an L-form. While D-glucose is very abundant in a natural state, L-glucose
is not
present in a natural state and its production method is very complicated, and
therefore,
when L-glucose is applied to a detergent, the production costs of the
detergent may
increase. For this reason, the sugar powder may be a D-glucose powder, that
is, a
dextrose powder.
The solid detergent may include a sodium hydrogen carbonate powder. The
solid detergent is titrated to pH 7.0 to 8.0 with the sodium hydrogen
carbonate, such
that recontamination of an object to be cleaned may be prevented, the
protection effect
on a user's skin may be exhibited, and detergency may be enhanced when being
used
with the sodium lauryl sulfoacetate and the sugar powder. In addition, the
sodium
hydrogen carbonate absorbs moisture contained in another type of powder, for
example, a sugar powder, to aggregate together while mixing and compressing
powders for manufacturing the solid detergent, and thus the structural and
morphological stability of the solid detergent may be enhanced, and it is
possible to
provide visual satisfaction to a user by imparting a required level of gloss
to the object
to be cleaned.
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A content of the sodium hydrogen carbonate may be 1 to 10 wt% based on the
total weight of the solid detergent. When the content of the sodium hydrogen
carbonate is less than 1 wt%, detergency may be lowered, and when the content
of the
sodium hydrogen carbonate is more than 10 wt%, a user's skin may be damaged.
The solid detergent may be manufactured by compressing a mixture including
a sodium lauryl sulfoacetate powder, a sugar powder and a sodium hydrogen
carbonate
powder into tablets, and a moisture content of the mixture may be 6 wt% or
less, and
preferably, more than 0 wt% and 6 wt% or less. The term "moisture content"
used
herein refers to the weight of water with respect to the total weight of a
specific
material containing moisture, which is expressed as a percentage. For example,
the
moisture content of the mixture containing moisture refers to the weight of
moisture
with respect to the total weight of the mixture, expressed as a percentage.
When the moisture content of the mixture is more than 6 wt%, processability
of the mixture and the structural and morphological stability of the solid
detergent may
be degraded, and when the mixture does not substantially contain moisture, it
is
difficult to manufacture a solid detergent having a uniform shape by
compressing the
mixture due to friction between powder.
Although a conventional solid detergent separately used a binder to enhance
binding strength between powder particles, since the binder may not only lower
the
disintegrability of the solid detergent but also lower detergency of the
detergent even
if being used in a small amount, because the binder is essentially water
insoluble,
which means that the conventional detergent is disadvantageous in terms of
environmental friendliness.
A powder constituting the solid detergent, for example, a sugar powder, may
include a predetermined amount of moisture, and therefore, the moisture
content of the
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solid detergent may also be adjusted within a predetermined range. As
described
above, the sodium hydrogen carbonate powder may absorb the moisture in the
process
of mixing and compressing the powders for manufacturing the solid detergent,
resulting in aggregation thereof, and thus the structural and morphological
stability of
the solid detergent may be enhanced.
FIGS. 1 to 3 are respective particle size distribution curves for a sodium
lauryl
sulfoacetate powder, a dextrose powder and a sodium hydrogen carbonate powder
according to an exemplary embodiment of the present invention.
The particle size of each powder is a critical factor for processing, that is,
compressing the powder, as well as the moisture content. When the particle
size of
the powder is very large, a disintegration rate is lowered, and thus bubble
generation
and detergency may be reduced, and when the particle size of the powder is
very small,
unnecessary aggregation between powder particles is generated, resulting in a
degradation in processability.
Referring to FIG. 1, the average particle size of the sodium lauryl
sulfoacetate
powder may be 40 to 80 gm. When the average particle size of the sodium lauryl
sulfoacetate powder is less than 40 gm, processability may be lowered, and
when the
average particle size of the sodium lauryl sulfoacetate powder is more than 80
gm,
disintegrability and detergency may be lowered.
Referring to FIG. 2, the average particle size of the glucose powder may be 70
to 130 gm. When the average particle size of the glucose powder is less than
70 gm,
processability may be lowered, and when the average particle size of the
glucose
powder is more than 130 gm, disintegrability and detergency may be lowered.
Referring to FIG. 3, the average particle size of the sodium hydrogen
carbonate
powder may be 60 to 120 gm. When the average particle size of the sodium
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carbonate powder is less than 60 gm, processability may be lowered, and when
the
average particle size of the sodium hydrogen carbonate powder is more than 120
gm,
disintegrability and detergency may be lowered.
Meanwhile, the sugar powder may further include a sucrose powder. The
sucrose also called cane sugar or sugar, is prepared by combining glucose and
fructose.
The sucrose is a natural sweetener made by refining raw sugar obtained from
sugar
cane or sugar beets. In detail, the sucrose may be prepared by extracting
liquid sugar
from the stem of sugar cane or the root of a sugar beet, boiling and filtering
the sugar
solution to remove impurities, and crystallizing the resultant.
Since the sucrose powder has substantially the same action effect as the
dextrose powder, the environmental friendliness of the solid detergent may be
improved by replacing a part, for example, 20 wt% or more, and preferably, 50
wt%
or more of the dextrose powder. Preferably, in the sugar powder, the content
of the
sucrose powder is 20 to 80 wt%. When the content of the sucrose powder is less
than
20 wt%, bubble generation and detergency may be lowered, and when the content
of
the sucrose powder is more than 80 wt%, the durability of the solid detergent
may be
lowered.
The sucrose powder is dissolved in water in cleaning, such that a pollutant is
attached to the sucrose molecule and removed, and thus, detergency may be
maximized by realizing a synergistic effect with the sodium lauryl
sulfoacetate. In
addition, the sucrose powder may be decomposed by a microorganism after
cleaning,
and thus excellent environment friendliness and a protective effect on a
user's skin
may be exhibited.
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The sucrose powder may be porous particles. The detergency of the solid
detergent may be enhanced by forming abundant bubbles due to pores of the
sucrose
powder, which induce bubble formation.
The porous particles may have a porosity of 20 to 80 vol%. When the
porosity of the porous particles is less than 20 vol%, bubble formation and
detergency
may be lowered, and when the porosity of the porous particles is more than 80
vol%,
the durability of the solid detergent may be lowered.
Meanwhile, the mixture may have an apparent density of 0.5 to 1.5g/cc, and
the solid detergent may have an apparent density of 1.51 to 3.0g/cc.
The term "apparent density" used herein refers to a calculated density of
particles including voids between them. For example, as the apparent density
of the
compressed solid detergent is higher, there is less space and particles are
more densely
agglomerated. That is, the higher the apparent density, the stronger the
binding
between particles.
In the present invention, the mixture is formed by mixing a sodium lauryl
sulfoacetate powder, a sugar powder and a sodium hydrogen carbonate powder,
and
the solid detergent may be formed by compressing the mixture using a tablet
press, so
that the binding strength between powder particles may increase. That is, the
apparent density of the mixture may be increased through compression.
When the apparent density of the mixture is less than 0.5g/cc, the durability
of
the solid detergent may be degraded, and when the apparent density of the
mixture is
more than 1.5g/cc, detergency may be degraded. In addition, when the apparent
density of the solid detergent is less than 1.51g/cc, the durability of the
solid detergent
may be degraded, and when the apparent density of the solid detergent is more
than
3.0g/cc, detergency may be degraded.
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Meanwhile, as needed, the solid detergent may further include a plant
essential
oil. The plant essential oil is a concentrated liquid extracted from the root,
leaves,
petals and roots of a plant, and since the plant essential oil is added to the
solid
detergent to emit a fragrance and exhibits a different effect depending on its
type, in
the present invention, the type of the plant essential oil may be selected
according to a
fragrance and an effect to be obtained.
Specifically, the plant essential oil may be one selected from the group
consisting of eucalyptus, peppermint, lemongrass, palmarosa, lavender,
chamomile,
tea tree oils and a mixture of two or more thereof, but the present invention
is not
limited thereto.
The solid detergent may be manufactured in a cylindrical or coin type. Here,
the diameter of the solid detergent is adjusted within the range of 7 to 30
mm, and thus
the solid detergent may be individually packaged. When the diameter of the
solid
detergent is less than 7 mm, the detergent may become excessively small, and
thus
processability and cleaning sustainability may be degraded, and when the
diameter of
the solid detergent is more than 30 mm, bubble generation and detergency may
be
reduced.
The solid detergent adjusted to the above range may be included at an amount
necessary for cleaning one or more times, and thus may be easily carried and
stored
and hygienically managed since the external exposure time is reduced.
In addition, although the individual packaging is formed with a safety cap
including an inner cap and an outer cap, and thus can be opened easily by a
uniform
external force, it is difficult to open with the power of an infant or child,
which
indicates excellent safety.
Hereinafter, examples of the present invention will be described in detail.
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Example 1
A mixture in which a moisture content was adjusted to 5 wt% was prepared by
mixing 35 wt% of a sodium lauryl sulfoacetate powder having an average
particle size
of about 61.18 gm, 60 wt% of a dextrose monohydrate powder having an average
particle size of about 113.11 gin, and 5 wt% of a sodium hydrogen carbonate
powder
having an average particle size of about 109.86 gm. A coin-type solid
detergent
having a size of 30 mm (diameter) x 5 mm (height) was manufactured by
compressing
the mixture using a tablet press under a pressure of 10 tons.
Example 2
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 4% was prepared
by
adjusting contents of respective powders to 40 wt% of a sodium lauryl
sulfoacetate
powder, 50 wt% of a dextrose monohydrate powder and 10 wt% of a sodium
hydrogen
carbonate powder.
Example 3
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 6% was prepared
by
adjusting contents of respective powders to 27 wt% of a sodium lauryl
sulfoacetate
powder, 70 wt% of a dextrose monohydrate powder and 3 wt% of a sodium hydrogen
carbonate powder.
Example 4
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 3% was prepared
by
further including 50 wt% of a sucrose powder having a porosity of 50 vol% with
respect to the total weight of a dextrose monohydrate powder.
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Comparative Example 1
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 3.8% was
prepared by
adjusting contents of respective powders to 45 wt% of a sodium lauryl
sulfoacetate
powder, 45 wt% of a dextrose monohydrate powder and 10 wt% of a sodium
hydrogen
carbonate powder.
Comparative Example 2
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 7% was prepared
by
adjusting contents of respective powders to 20 wt% of a sodium lauryl
sulfoacetate
powder, 75 wt% of a dextrose monohydrate powder and 5 wt% of a sodium hydrogen
carbonate powder.
Comparative Example 3
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 0% was prepared
by
including 60 wt% of an anhydrous dextrose powder instead of a dextrose
monohydrate
powder.
Comparative Example 4
A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 5% was prepared
by
adjusting contents of respective powders to 39.5 wt% of a sodium lauryl
sulfoacetate
powder, 60 wt% of a dextrose monohydrate powder and 0.5 wt% of a sodium
hydrogen
carbonate powder.
Comparative Example 5
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A solid detergent was manufactured by the same method as described in
Example 1, except that a mixture having a moisture content of 5% was prepared
by
adjusting contents of respective powders to 29 wt% of a sodium lauryl
sulfoacetate
powder, 60 wt% of a dextrose monohydrate powder and 11 wt% of a sodium
hydrogen
carbonate powder.
Experimental Example 1: Apparent density of detergent
FIGS. 4 and 5 respectively show the results of measuring apparent densities of
the powder mixture and the solid detergent according to Example 1. Referring
to
FIGS. 4 and 5, average values obtained through measuring the apparent
densities of
the powder mixture and the solid detergent according to Example 1 five times
were
1.4936 g/cc and 1.5182 g/cc, respectively, indicating that the apparent
densities were
increased by aggregation of the powders through compression and a reduction in
volume of pores in the powders. Particularly, it can be seen that the
structure and
morphology of the solid detergent may be stably realized at an apparent
density higher
than 1.5 g/cc.
Experimental Example 2: Evaluation of detergent performance
[Table 1]
Degree of bubble
lassification Disintegrability Detergency Durability
Usability
generation
Example! CD 0 C)
I xample 2 CD CD 0
0
xample 3
xample 4 CD CD @ CD CD CD
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Comparative
A A A A A
Example 1
Comparative
A A A
Example 2
Comparative
Example 3
Comparative
A A
Example 4
Comparative
A A A
Example 5
-Degree of bubble generation: Product comparison in bubble generation and
maintenance when
detergent was used
- Disintegrability: Evaluation of rates of dissolving detergent in water when
detergents were used
-Detergency: Evaluation of conditions of dishes after cleaning
-Durability: Product comparison in degree of crumbling or breaking when
detergent was used--
Usability: Product comparison in ease of use when detergent was used
(Relative evaluation standard: - excellent, o - good, A - moderate, x -
bad)
Referring to Table 1, it was shown that the solid detergent (Example 1)
manufactured using a mixture having moisture content of 5%, which includes a
sodium
lauryl sulfoacetate powder, a dextrose monohydrate powder and a sodium
hydrogen
carbonate powder was evaluated to be excellent in all aspects of performance
evaluation (degree of bubble generation, disintegrability, detergency,
durability, and
usability).
In addition, the solid detergents (Examples 2 and 3) manufactured using
mixtures in which moisture contents were adjusted to 4% and 6%, respectively,
by
adjusting the content of a dextrose monohydrate powder were evaluated to be
excellent
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or good in all aspects of performance evaluation while there were little
difference
between them, and the solid detergent (Example 4) manufactured by further
including
a sucrose powder was evaluated to be excellent in all aspects of performance
evaluation, which was the same as Example 1. Particularly, it is expected that
a solid
detergent will exhibit excellent detergency due to the synergistic effect with
another
type of powder.
On the other hand, in the case of the solid detergents (Comparative Examples
1 and 2) including an excessively small or large amount of a dextrose
monohydrate
powder, the structural and morphological stability of the solid detergent was
degraded,
resulting in degradation in durability and usability, and particularly, since
the solid
detergent manufactured using the mixture having a moisture content of 7%
became
easily soft, it was difficult to continuously generate and maintain bubbles,
and thus
exhibited poor durability and usability.
In addition, the solid detergent (Example 3) manufactured using a mixture
having a moisture content of 0% by including an anhydrous dextrose powder as a
sugar
powder had degraded binding and binding retention between powder particles,
resulting in poor results in all aspects of performance evaluation.
Meanwhile, when the sodium hydrogen carbonate powder was contained in an
excessively small or large amount (Comparative Examples 4 or 5), the
aggregation
strength of each powder may be lowered, and thus all aspects of performance
evaluation were deteriorated, and particularly, durability and usability were
poor.
Experimental Example 3: Evaluation of skin protection performance of
detergent
The skin protection performance of solid detergents according to the Examples
was evaluated as follows.
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To evaluate the skin protection performance of the solid detergents according
to a surfactant involved in skin damage, Example 1 as an experimental group
and a
solid detergent including a conventional sulfate-based surfactant as a control
were used
for an experiment.
For the experiment, 10 rabbits were used as experimental subjects, and before
the introduction into the experiment, the health conditions of all individuals
were
visually examined and healthy individuals were used for the experiment after 8
days
of quarantine and acclimation.
The dorsal areas of the 10 rabbits were shaved, and immediately before
treatment, two treatment sections with an area of 2.5 cm x 2.5 cm were
classified into
a scratched area and an unscratched area and two control sections were
classified into
a scratched area and an unscratched area. In each scratched area, scratching
was
carried out to the extent that only the epidermis, not the dermis, was
damaged.
Gauzes soaked with 0.5 mL of the solid detergent according to Example 1 were
attached to treatment sections (scratched area 1, unscratched area 1) of each
of the 10
experimental subjects, gauzes soaked with 0.5 mL of a sulfate-based solid
detergent
were attached to control sections (scratched area 1 and unscratched area 1) of
each of
the 10 experimental subjects, and then the areas were fixed with a non-
irritative tape
and an elastic bandage without removal of the gauzes. After 24 hours, the
gauzes
were removed, and the material remaining on the skin was cleaned.
After 72 hours, the experimental subjects were evaluated for erythema, edema
and the primary irritation index (P.I. I.). Here, the evaluation criteria and
results are
respectively shown in Tables 2 and 3 below.
[Table 2]
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Evaluation criteria for Evaluation criteria for edema
erythema formation formation
No erythema (0 point) No edema (0 point) 0.0 to 0.5 (non-irritative)
Very mild erythema (1 point) Very mild edema (1 point) 0.6 to 2.0 (weakly
irritative)
Obvious erythema (2 points) Mild edema (2 points) 2.1 to 5.0 (moderately
irritative)
Slightly severe erythema (3
Moderate edema (3 points) 5.1 to 8.0 (strongly
irritative)
points)
Severe erythema (4 points) Severe edema (4 points)
[Table 3]
Classification Erythema Edema
Experimental Group (Example
0 0 0.3
1)
Control (sulfate-based
3 2 4.2
detergent)
Referring to Table 3, it was shown that, when sodium lauryl sulfoacetate,
which is a natural surfactant, was included (Example 1), erythema and edema
were not
formed, and the P. I. I. was 0.3, indicating an excellent skin protection
effect. On the
other hand, in the case of the sulfate-based detergent, which includes a
synthetic
surfactant, erythema and edema were formed, and the P. I. I. was 4.2,
indicating the
moderate level of skin irritation.
It should be understood by those of ordinary skill in the art that the above
description of the present invention is exemplary, and the exemplary
embodiments
disclosed herein can be easily modified into other specific forms without
departing
from the technical spirit or essential features of the present invention.
Therefore, the
exemplary embodiments described above should be interpreted as illustrative
and not
CA 3064213 2019-12-09
limited in any aspect. For example, components described as a single form may
be
dispersed, and components described as being dispersed may also be implemented
in
a combined form.
A solid detergent according to an aspect of the present invention can have
increased environmental friendliness and improved detergency since it is
manufactured by adding a sugar powder to a natural surfactant. Particularly,
since
the mixture prepared in a powder form can be compressed into tablets without a
binder,
disintegrability and bubble generation in cleaning are facilitated, and thus
detergency
can be enhanced.
In addition, the solid detergent is compressed into tablets and thus can be
easily
stored, and the overuse of the solid detergent can be prevented compared to a
liquid
detergent.
Therefore, environmental protection and economic effects can be
exhibited.
It should be understood that the effects of the present invention are not
limited
to the above-described effects, and include all effects that can be deduced
from the
descriptions disclosed in the detail description or claims of the present
invention.
The scope of the present invention is defined by the appended claims and
encompasses all modifications and alterations derived from meanings, the scope
and
equivalents of the appended claims.
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