Note: Descriptions are shown in the official language in which they were submitted.
CA 03104954 2020-12-23
Humidity regulation liquid, environmental humidity regulating article and
manufacturing method therefor
FIELD OF THE INVENTION
The present invention relates specifically to a humidity regulation liquid, an
environmental humidity regulating article and manufacturing method therefor.
BACKGROUND OF THE INVENTION
"Humidity" is an important factor that affects product packaging and storage
life
in all walks of life. Each product requires a reasonable humidity range to
store. For
example, camera lens requires to be stored within 45%-55% humidity range, the
ambient humidity below the numerical value will make the rubber seal ageing,
and
the ambient humidity above the numerical value will make the lens foggy. The
humidity to store products like wooden musical instruments is 45%-55%, the
ambient
humidity below the numerical value will cause wood deformation and may further
affects the sound quality, and the ambient humidity above the numerical value
will
make wood moldy, or will make wood absorb a lot of moisture, causing the wood
swell
and damage wooden products.
In order to regulate the environmental humidity till within range 45%-55%, the
common method is to use gel-type humidity regulation articles to regulate the
environmental humidity. When using, the humidity regulate gel needs to be
pre-balanced in a constant temperature and humidity chamber, and then the
balanced humidity regulate gel is placed into the target environment. The
balanced
humidity regulate gel can absorb water vapor (absorb moisture) when the target
environmental humidity is too high, and release water vapor (release moisture)
when
the humidity is too low, so that the humidity of the target environment is
maintained
within a certain range.
However, the above-mentioned humidity regulate gel has the following
shortcomings: (I) the humidity regulate accuracy is poor so that the humidity
of the
target environment may fluctuate in a large range (for example, within the
range of
10%) during use, and it is difficult to maintain a fixed humidity; (2) the
production
process consumes a lot of energy and produces a lot of waste water, which is
not
conducive to environmental protection; (3) the user needs to prepare a
temperature
and humidity chamber for the pre-balance of such a humidity regulate gel so
the use
cost is high, meanwhile the temperature and humidity chamber is volume-limited
and
it takes a long time to reach the humidity balance, which makes the gel
inconvenient
for use.
SUMMARY OF THE INVENTION
The present invention aims the above problems, and provides an environmental
humidity regulating article with cheap raw materials, good humidity regulate
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performance, energy saving, and convenient use and a manufacturing method
thereof
with simple process. The present invention also provides a humidity regulation
liquid
contained in the humidity regulation article, and the humidity regulation
liquid is
also used to be coated to a substrate to manufacture the environmental
humidity
regulating article.
The present invention provides a humidity regulation liquid, used for coated
onto
a substrate to manufacture an environmental humidity regulating article used
to
regulate environmental humidity within 45%-55%, characterized by comprising:
at
least one kind of organic acid salt, at least one kind of polyols and water,
wherein the
organic acid salt is at least one of sodium lactate, potassium lactate and
sodium
formate, the count of carbon in the polyols is not greater than 5, the weight
percentage of the organic acid salt in the humidity regulation liquid is 30.6%-
58.8%,
the weight percentage of the polyols in the humidity regulation liquid is 9.3%-
26.7%.
The present invention also provides a manufacturing method for an
environmental humidity regulating article used to regulate environmental
humidity
within 45%-55%, characterized by including the following steps:
step 1, prepare a humidity regulation liquid,
mix at least one kind of organic acid salt, at least one kind of polyols and
water at
not less than 40 C to prepare a humidity regulation liquid;
step 2, coat the humidity regulation liquid onto a substrate;
coat the substrate with the humidity regulation liquid of a coating speed of
1-15m/s at a predestined temperature no less than 40 C, and the humidity
regulation
liquid loaded onto the substrate is 0.54-0.74 g per cubic centimeter,
wherein the organic acid salt is at least one of sodium lactate, potassium
lactate
and sodium formate,
the count of carbon in the polyols is not greater than 5,
the weight percentage of the organic acid salt in the humidity regulation
liquid is
30.6%-58.8%,
the weight percentage of the polyols in the humidity regulation liquid is
9.3%-26.7%.
The manufacturing method provided by the present invention could be further
characterized by that, wherein the predestined temperature in step 2 is 45-55
C.
The manufacturing method provided by the present invention could be further
characterized by that, wherein the weight percentage of the organic acid salt
is 44.4
¨46.2%, the weight percentage of the polyols is 13.3 ¨20.5%.
The manufacturing method provided by the present invention could be further
characterized by that, wherein the organic acid salt is sodium lactate, the
polyols is
glycerol.
The manufacturing method provided by the present invention could be further
characterized by that, wherein the organic acid salt is sodium lactate, the
polyols is
ethylene glycol.
The manufacturing method provided by the present invention could be further
characterized by that, wherein the organic acid salt comprises two kinds,
sodium
lactate and potassium lactate, the polyols is ethylene glycol, the weight
percentage of
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the sodium lactate is 15.6 ¨45%, the weight percentage of the potassium
lactate in the
humidity regulation liquid is 10-30%, the total weight percentage of the
sodium
lactate and potassium lactate is 30.6-58.8%.
The manufacturing method provided by the present invention could further
comprising: step 3, cut the substrate, cut the substrate into a predetermined
size, the
material of the substrate is any one of paper material, cotton cloth, chemical
fiber
material, non-woven fabric, felt, porous plastic, and mineral substrate.
The manufacturing method provided by the present invention could further
comprise: step 4, package, pack the substrate loaded with the humidity
regulation
liquid with a package bag.
Also the present invention provides an environmental humidity regulating
article
used to regulate environmental humidity within 45%-55%, characterized by being
manufactured by anyone of above-mentioned manufacturing methods.
THE EFFECT OF THE PRESENT INVENTION
According to the humidity regulation liquid and environmental humidity
regulating article of the present invention, the humidity regulation liquid is
composed
of organic acid salt, polyols and water, wherein the organic acid salt is at
least one of
sodium lactate, potassium lactate and sodium formate, the count of carbon in
the
polyols is not greater than 5, the weight percentage of the organic acid salt
in the
humidity regulation liquid is 30.6%-58.8%, the weight percentage of the
polyols is
9.3%-26.7%. Therefore, the humidity regulation liquid of the present invention
can be
used to manufacture environmental humidity regulating article. The
environmental
humidity regulating article can regulate and maintain the environmental
humidity
within a certain humidity in a range of 45%-55%, and the humidity does not
fluctuate
during the maintenance process. On the other hand, the environmental humidity
regulating article can regulate the environmental humidity directly after
being
directly placed in the target environment without being pre-balanced, so users
do not
need to prepare the humidity chamber, which makes it is convenient and fast
for use
with low cost.
In addition, in the manufacturing method of the environmental humidity
regulating article of the present invention, since the temperature is not
lower than
40 C during the preparation and coating process of the humidity regulation
liquid,
the solute is easy to dissolve and the solution is easy to coat. Moreover,
there is a
temperature difference between the coating process temperature and room
temperature, once the coating process is completed and the article is placed
to room
temperature, the solute solubility of the humidity regulation liquid loaded
onto the
substrate will change, so that the solution changes from an unsaturated state
to a
saturated state and then produces fine crystals, making the humidity control
article
obtain a higher ability of moisture absorption and release, and obtain a
better
humidity control performance. Furthermore, the manufacturing method has the
advantages of simple steps, low energy consumption and low cost.
BREIF DESCRIPTION OF THE DRAWINGS
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Fig. 1 is an electron microscope photograph of the environmental humidity
regulating article according to embodiment 8 of the present invention.
Fig. 2 is a humidity regulation effect diagram of the environmental humidity
regulating article according to the embodiment 8 of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
<Embodiment 1>
A manufacturing method for an environmental humidity regulating article used
to regulate environmental humidity within 45%-55%, including the following
steps:
Step 1, prepare a humidity regulation liquid.
Mix at least one kind of organic acid salt, at least one kind of polyols and
water at
not less than 40 C to prepare a humidity regulation liquid.
Step 2, coat the humidity regulation liquid onto a substrate.
Coat the substrate with the humidity regulation liquid of a coating speed of
5-10m/s until the coating length reaches 3-10m, and the humidity regulation
liquid
loaded onto the substrate is 0.64 g per cubic centimeter.
Step 3, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness
of
the substrate is greater than 1 mm. The predetermined size can be set
according to
the needs of users, and can be from 1 cmx 1 cm to 100 cmx100 cm.
The substrate has a certain water absorption performance, and the water
absorption of the substrate is not less than 100% of its own volume per cubic
centimeter. The material of the substrate can be any one of paper material,
cotton
cloth, chemical fiber material, non-woven fabric, felt, and porous plastic. In
this
embodiment 1, the substrate is a kind of paper materials, cotton wood pulp
paper. The
water absorption performance of the cotton wood pulp paper is not less than
0.8 g per
cubic centimeter, and the water retention performance is not less than 1.2 g
per cubic
centimeter. The thickness of the cotton wood pulp paper is 2mm to facilitate
cutting
operation.
The organic acid salt is sodium lactate, and the polyols is glycerol.
The weight percentage of sodium lactate is 30.6% ¨58.8%, and the weight
percentage of glycerol is 9.3% ¨26.7%.
The purity of the sodium lactate is not less than 99.9%, and the purity of the
glycerol is not less than 99.9%. The water is deionized water.
<Embodiment 2>
A manufacturing method for an environmental humidity regulating article used
to regulate environmental humidity within 45%-55%, including the following
steps:
Step 1, prepare a humidity regulation liquid.
Mix at least one kind of organic acid salt, at least one kind of polyols and
water at
not less than 40 C to prepare a humidity regulation liquid.
Step 2, coat the humidity regulation liquid onto a substrate.
Coat the substrate with the humidity regulation liquid of a coating speed of
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1'-'5M/S until the coating length reaches 2-6m, and the humidity regulation
liquid
loaded onto the substrate is 0.74 g per cubic centimeter.
Step 3, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness
of
the substrate is 0.1-1 mm. The predetermined size can be set according to the
needs
of users, and can be from 2 cmx2 cm to 50 cmx50 cm.
The organic acid salt is sodium lactate, and the polyols is glycerol.
The weight percentage of sodium lactate is 44.4%-46.2%, and the weight
percentage of glycerol is 13.3% ¨20.5%.
The purity of the sodium lactate is not less than 99.9%, and the purity of the
glycerol is not less than 99.9%. The water is deionized water.
When the weight percentage of the sodium lactate and the glycerol are greater
than the above-mentioned percentage ranges, crystallization is easy to occur
in the
solution, which needs high temperature to re-dissolve, resulting in high loss
and
making quality of the solution unstable. When the weight percentage of the
sodium
lactate and the glycerol are less than the above-mentioned percentage ranges,
the
humidity-regulating substance in the humidity-controlling solution loaded on
the
substrate will decrease, leading the humidity-regulating performance
decreases.
<Embodiment 3>
A manufacturing method for an environmental humidity regulating article used
to regulate environmental humidity within 45%-55%, including the following
steps:
Step 1, prepare a humidity regulation liquid.
Mix at least one kind of organic acid salt, at least one kind of polyols and
water at
40 C to prepare a humidity regulation liquid.
Step 2, coat the humidity regulation liquid onto a substrate.
Coat the substrate with the humidity regulation liquid of a coating speed of
10-15m/s at 40 C, the humidity regulation liquid loaded onto the substrate is
0.54 g
per cubic centimeter.
Step 3, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness
of
the substrate is 0.1-1 mm. The predetermined size can be set according to the
needs
of users, and can be from 2 cmx2 cm to 50 cmx50 cm.
Step 4, package.
Pack the substrate loaded with the humidity regulation liquid with a package
bag.
In this embodiment 3, the organic acid salt is sodium lactate, and the polyols
is
ethylene glycol.
The weight percentage of sodium lactate is 44.4%-46.2%, and the weight
percentage of ethylene glycol is 13.3%-20.5%.
The purity of the sodium lactate is not less than 99.9%, and the purity of the
ethylene glycol is not less than 99.9%. The water is deionized water.
The substrate loaded with the humidity regulation liquid is held in the
package
bag. The package bag is made of thin film materials, which are permeable to
water
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vapor but not to liquid solutions, such as non-woven fabrics, composite
plastic bags,
paper-plastic composite bags, and cloth bags. In this embodiment 3, the
material of
the package bag is non-woven fabric.
<Embodiment 4>
A manufacturing method for an environmental humidity regulating article used
to regulate environmental humidity within 45%-55%, including the following
steps:
Step 1, prepare a humidity regulation liquid.
Mix at least one kind of organic acid salt, at least one kind of polyols and
water at
not less than 40 C to prepare a humidity regulation liquid.
Step 2, coat the humidity regulation liquid onto a substrate.
Coat the substrate with the humidity regulation liquid of a coating speed of
1-15m/s at not less than 40 C, and the humidity regulation liquid loaded onto
the
substrate is 0.64 g per cubic centimeter.
Step 3, cut the substrate.
Cut the substrate into a predetermined size. In this embodiment, the thickness
of
the substrate is 0.1-1 mm. The predetermined size can be set according to the
needs
of users, and can be from 2 cmx2 cm to 50 cmx50 cm.
In this embodiment 4, the organic acid salt is sodium formate, and the polyols
is
ethylene glycol.
The weight percentage of sodium formate is 44.4%-46.2%, and the weight
percentage of ethylene glycol is 13.3%-20.5%.
The purity of the sodium formate is not less than 99.9%, and the purity of the
ethylene glycol is not less than 99.9%. The water is deionized water.
The substrate loaded with the humidity regulation liquid is held in the
package
bag. The package bag is made of thin polymer film materials, which are
permeable to
water vapor but not to liquid solutions. In this embodiment 4, the material of
the
package bag is polyester.
<Embodiment 5>
A manufacturing method for an environmental humidity regulating article, in
which the specific steps are the same as the embodiment 1.
Wherein, the organic acid salt is potassium lactate, and the polyols is
glycerol.
The weight percentage of potassium lactate is 44.4%-46.2%, and the weight
percentage of glycerol is 13.3%20.5%.
The purity of the potassium lactate is not less than 99.9%, and the purity of
the
glycerol is not less than 99.9%. The water is deionized water.
<Embodiment 6>
A manufacturing method for an environmental humidity regulating article, in
which the specific steps are the same as the embodiment 1.
Wherein, the organic acid salt is potassium lactate, and the polyols is
ethylene
glycol.
The weight percentage of potassium lactate is 44.4%-46.2%, and the weight
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percentage of ethylene glycol is 13.3%-20.5%.
The purity of the potassium lactate is not less than 99.9%, and the purity of
the
ethylene glycol is not less than 99.9%. The water is deionized water.
<Embodiment 7>
A manufacturing method for an environmental humidity regulating article, in
which the specific steps are the same as the embodiment 1.
Wherein, the organic acid salt is sodium lactate and potassium lactate, and
the
polyols is ethylene glycol.
The weight percentage of sodium lactate is 15.6%-45%, the weight percentage of
potassium lactate is 10%-30%, and the weight percentage of ethylene glycol is
13.3%-20.5%.
The purity of the sodium lactate is not less than 99.9%, the purity of the
potassium lactate is not less than 99.9% and the purity of the ethylene glycol
is not
less than 99.9%. The water is deionized water.
Take the embodiment 2 as an example, the weight percentages of sodium lactate,
glycerol and water for regulating different humidity in the humidity
regulation liquid
are shown in Table 1 below:
Table 1. The weight percentages of sodium lactate, glycerol and water for
regulating different humidity in the humidity regulation liquid of embodiment
4
Regulating
Sodium lactate (%) Glycerol (%) H20 (%)
humidity (%)
45 45.5 20.5 34.0
50 46.2 16.1 37.7
55 44.4 13.3 42.3
Take the environmental humidity regulating article in the embodiment 2 with a
size of 0.42m2, a thickness of 0.3 cm and a weight of 1 kg, and regulate the
environmental humidity of an 1 cubic meter airtight space (without external
air
exchange) with an initial humidity of 10%-90% at 25 C. The environmental
humidity
of the space can be regulated to a certain humidity within 45%-55% with a long-
time
regulating effective. If the air in the space is exchanged with the outside
air with a
humidity range of 80% for a long time, the effective time of humidity
regulating is 1
month.
<Embodiment 8>
It is found by inventors that the humidity regulation liquid composed of at
least
one kind of organic acid salt, at least one kind of polyols and water in the
above
embodiments is an unsaturated solution at a certain temperature, and the
unsaturated solution performs well properties of fluidity. In addition, the
solubility of
solutes such as organic acid salt and polyols used in the above-mentioned
embodiments at different temperatures differs obviously. Therefore, in the
process of
coating the humidity regulation liquid to the substrate, if the solution is
kept at the
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certain temperature, the coating process can proceed smoothly; further, after
coating
on the substrate, if the solution is gradually reduced till room temperature
(20 C-25 C), the following phenomena will occur: as the temperature decreases,
the
solubility of the solute in the solution decreases, making the solution change
from
unsaturated to saturated, which in turn makes the solute in the solution (such
as
organic acid salt) form fine crystals, and the saturated solution containing
fine
crystals has a capacity of moisture absorption and release higher than other
solutions,
so that the environmental humidity regulating article has a good humidity
regulating performance, and can quickly regulate and maintain the
environmental
humidity to a predetermined humidity.
Therefore, in the manufacturing methods of environmental humidity regulating
articles of the above embodiment 1 to 7, the preparation in step 1 and coating
process
in step 2 are both performed under the condition of not lower than 40 C. This
embodiment is an experiment to investigate the optimal temperature of the
preparation and coating on the basis of above embodiments. The specific
operation
steps are the same as embodiment 1. At the same time, the formula of the
humidity
regulation liquid is the same as that in Table 1 for regulating humidity 50%,
that is,
the humidity regulation liquid of this embodiment is composed 46.2% weight
percentage of sodium lactate, 16.1% weight percentage of glycerol, and 37.7%
weight
percentage of water.
Also it is found by inventors that sodium lactate and glycerol are easier to
dissolve between 40 C and 80 C, specifically: if it is lower than 40 C, the
solids cannot
be completely dissolved in the liquid solvent, and the obtained humidity
regulation
liquid contains fine particles and seems slightly turbid. If the temperature
is higher
than 80 C, the solvent (i.e., water) will partly volatilize, resulting in a
composition
ratio change of the humidity-conditioning liquid obtained after dissolution.
According
to Table 1, such composition changes in the humidity regulation liquid will
lead to
regulating humidity (which is, target humidity of regulating), so that the
environmental humidity regulating article cannot maintain the target
environment
near the regulating humidity.
In order to avoid such problems, the step 1 of this embodiment adopts the
method
of heating and dissolving between 40 C and 80 C, specifically: heating the
water to
40 C, adding solids and then stirring while heating until the temperature
reaches
80 C, keep the temperature and stir until all the solids are dissolved and the
solution
become uniform and transparent, and the humidity regulation liquid is
obtained.
Then, the temperature of the humidity regulation liquid is regulated to a
predetermined temperature, and the environmental temperature of the coating
equipment is maintained at the predetermined temperature to perform the
coating
operation of step 2.
For step 2, this embodiment investigate the difference in the weight of the
substrate before and after coating (i.e., the weight reduction) under the
condition that
the coating temperature is a predetermined temperature and the coating action
lasts
for a predetermined time. The specific results are shown in Table 2 below. In
Table 2,
40 C, 45 C, 50 C, 55 C, 65 C, 75 C, 80 C, 85 C, 90 C are the predetermined
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temperatures for the coating process, 10min, 30min, 60min, 80min, 100min are
the
predetermined time of the coating operation lasts, and the percentage values
in the
table are the percentage of weight reduction of each coated substrate after it
is
lowered to room temperature (20 C ¨25 C).
Table 2. The relationship between solvent volatilization (%) and coating time
at
different predetermined temperatures
40r 45r 50r 55r 65r 75r 80r 85r 90r
10min 0 0 0 0 0 0 0.32% 0.64% 1.5%
30min 0 0 0 0 0 0.09% 0.89% 2.1% 4.7%
60min 0 0 0 0 0.14% 0.17% 1.78% 3.98% 8.2%
80min 0 0 0 0.1% 0.18% 0.25% 2.76% 5.76% 10.8%
100min 0 0 0 0.15% 0.23% 0.31% 3.8% 6.9% 13.7%
Due to the differences in the solubility of different solutes, when the
solvent
volatilization exceeds 5%, the weight percentage of the solute in the obtained
saturated solution will change. If the weight percentage is changed, the
environmental humidity regulating article cannot regulate the environmental
humidity within 2% of the target humidity, and cannot achieve the humidity
regulation requirements.
According to the solvent volatilization data shown in Table 2, when the
predetermined temperature of the coating process is 85 C, the solvent
volatilization
exceeds 5%, and the humidity control article obtained in this way cannot meet
the
demand. Therefore, the predetermined temperature for coating should not exceed
80 C.
Further, the inventors also investigated the optimal range of the
predetermined
temperature for coating based on the actual conditions of the coating
equipment of the
prior art.
Specifically, the inventors tried two processes, roll coating and dip coating,
to coat
cotton wood pulp paper substrates of different thicknesses with the humidity
regulation liquid of the above embodiments, and found that: for substrates of
different
sizes, under the premise of uniform coating, the maximum time required for
roller
coating and dip coating are generally within 80 minutes. Therefore, the
coating
process can generally be completed within 80 minutes. According to Table 2,
when the
predetermined temperature of the coating process is 60 C, the volatilization
of the
solvent within 80 minutes is almost zero. In addition, when the temperature
difference between the predetermined temperature of the coating process and
the
room temperature is large, maintaining the predetermined temperature requires
more energy, so the predetermined temperature should not be too high
considering
with energy consumption. Therefore, the lower limit of the optimum range of
the
predetermined temperature in the coating process is 55 C.
In addition, when the predetermined temperature is 40 , the humidity
regulation
liquid shows a high viscosity and is likely to crystallize during the coating
process. It
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is difficult for the existing roll coating equipment or dip coating equipment
to ensure
uniform coating in this situation. When the predetermined temperature rises to
45 C,
the humidity-conditioning liquid is transparent and the viscosity decreases,
which
makes the roll coating equipment or dip coating equipment can achieve uniform
coating, so the lower limit of the optimal range of the predetermined
temperature is
45 C.
In summary, the optimum temperature range for the coating operation obtained
in this embodiment is 45 C to 55 C.
Fig. 1 is an electron microscope photograph of the environmental humidity
regulating article according to embodiment 8 of the present invention.
Specifically,
Fig. 1 selects the environmental humidity regulating article prepared under
the
conditions of the predetermined temperature of 50 C and the coating time of
80
minutes in the coating process of this embodiment.
As shown in Fig. 1, in the environmental humidity regulating article obtained
by
the manufacturing method of this embodiment, the humidity regulation liquid
forms
fine crystals inside the substrate, and these crystals have relatively uniform
particle
size and relatively uniform distribution. At the same time, these crystals
attach onto
the fibers inside the substrate, so they are not easy to fall off.
Fig. 2 is a humidity regulation effect diagram of the environmental humidity
regulating article according to the embodiment 8 of the present invention. In
Fig. 2,
the abscissa is time (day), and the ordinate is temperature (SC) and humidity
(%).
Cut the environmental humidity regulating article corresponding to Fig. 1 into
small pieces, take lOg and put into a closed container (the volume of the
container is
about 2L), and use a hygrometer to monitor and record the humidity in the
container
in real time. The result is shown in Fig. 2.
It can be seen from Fig. 2 that the initial humidity in the container is about
45%.
After putting the environmental humidity regulating article of this embodiment
(the
putting time is Ti), the humidity rises rapidly and reaches 50% in a very
short time.
Subsequently, it has been maintained at 50% for a long time and the humidity
hardly
fluctuates during the process. After taking out the environmental humidity
regulating article (the taking time point is T2), the humidity inside the
container
drops rapidly to close to the initial humidity because the inside of the
container is
connected to the outside world.
It can be seen that the environmental humidity regulating article of this
embodiment can quickly regulate the environmental humidity to the target
humidity,
and can maintain the humidity for a long time without humidity fluctuations
during
the process.
The Effect of the embodiments
According to the humidity regulation liquid and environmental humidity
regulating article of the present embodiments, the humidity regulation liquid
is
composed of organic acid salt, polyols and water, wherein the organic acid
salt is at
least one of sodium lactate, potassium lactate and sodium formate, the count
of
carbon in the polyols is not greater than 5, the weight percentage of the
organic acid
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salt in the humidity regulation liquid is 30.6%-58.8%, the weight percentage
of the
polyols is 9.3%-26.7%. Therefore, the humidity regulation liquid of the
present
embodiments can be used to manufacture environmental humidity regulating
article.
The environmental humidity regulating article can regulate and maintain the
environmental humidity within a certain humidity in a range of 45%-55%, and
the
humidity does not fluctuate during the maintenance process. On the other hand,
the
environmental humidity regulating article can regulate the environmental
humidity
directly after being directly placed in the target environment without being
pre-balanced, so users do not need to prepare the humidity chamber, which
makes it
is convenient and fast for use with low cost.
Moreover, the humidity regulation liquid in the environmental humidity
regulating article of this embodiment uses common salts such as sodium
lactate,
potassium lactate and sodium formate, so the solution composed of these salts
is not
only low in cost, but also safe for the manufacture workers and environment.
When
protecting lens or the wooden musical instruments, the compounds in the
humidity
regulation liquid of this embodiment will not corrode the lens or the musical
instrument at all, so that the user can rest assured. Moreover, the
environmental
humidity regulating articles of these embodiment are only composed of organic
acid
salt, polyols, water and paper base material, so it is friendly to the natural
environment after being discarded, and can be naturally decomposed without
causing
secondary pollution.
In addition, in the manufacturing method for the environmental humidity
regulating articles of these embodiment, since the humidity regulation liquid
is
prepared at 40 C to 80 C, the solute is easily dissolved and the preparation
operation
is easy to complete; because the humidity regulation liquid is coated at a
predetermined temperature of 45 C-55 C, so the solution is easy to coat for
the low
viscosity; further, because the solute solubility of the solute in the
humidity
regulation liquid changes after the coating is completed, so the humidity
regulation
liquid changes from the unsaturated state to the saturated state, which causes
the
fineness crystallization and makes the environmental humidity regulating
article
perform higher capacity of moisture absorption and release, and has well
humidity
control performance.
The foregoing embodiments are preferred cases of the present invention and is
not used to limit the scope of protection of the present invention.
In the above embodiments, the polyol used in the manufacturing method of the
present invention uses glycerol and ethylene glycol, but the same effect can
be
achieved when polyols with a carbon number not greater than 5 are used.
In the embodiments, the substrate is a kind of paper materials, cotton wood
pulp
paper. This kind of substrate is mainly made of wood pulp, cotton pulp, etc.,
so it has
strong water retention and can absorb more liquid. In the present invention,
the
substrate can also be made of other similar materials, such as cotton cloth,
chemical
fiber materials, non-woven fabrics, felt, porous plastics, mineral substrates
and the
like.
11
Date Recue/Date Received 2020-12-23
CA 03104954 2020-12-23
In the embodiment, the package bag is made of a thin-walled material that is
permeable to water vapor but not permeable to liquid solutions. In the present
invention, small holes can also be provided on the package bag, and the speed
of
humidity adjustment can be changed by adjusting the number of small holes (for
example, a large number of small holes can allow the environmental humidity
regulating articles to contact the air in the environment faster, leading a
quicker
humidity regulation). Furthermore, other package ways can also be used in the
present invention, for example, a protective film made of breathable material
could be
covered on the surface of the substrate coated with the humidity regulation
liquid and
lowered to room temperature, so that the humidity regulating article is of a
larger
size, which users can cut arbitrarily according to their needs, being more
convenient
to use.
12
Date Regue/Date Received 2020-12-23
