Cross-reference to related applications
Background of the invention
Field of the Invention
[0002] The present disclosure relates to a manufacturing method of a waterproof glove and,
more particularly, to a manufacturing method of a waterproof glove that has excellent
wearing comfort because a membrane sheet applied with a hot-melt adhesive is applied,
that shows excellent waterproofness and humidity discharge performance because a lining
and an outshell are in close contact with each other, of which the lining or the outshell
is not separated when the glove is taken off, and of which the manufacturing time
and manufacturing cost are low because the manufacturing process is simplified.
Description of the Related Art
[0003] In general, gloves are usually used for working, cold weather, leisure, sports, etc.
Gloves for working are usually used to prevent hands from being injured by protecting
hands from external shock, etc. and gloves for cold weather are used to protect hands
from external chillness.
[0004] Further, gloves used for sports or leisure are worn to prevent factors that decrease
efficiency of sports such as external shock to hands or slip of hands. In particular,
as for sports that require equipment such as baseball, golf, and tennis, gloves may
be considered as necessities to absorb external shock, prevent slip, or hold equipment
well.
[0005] Such gloves of the related art are generally made of leather such as natural leather
or synthetic leather, cotton, rubber, or the like, and the effect of protecting hands
by absorbing external shock can be expected simply from the shapes when they are worn.
However, there is a problem that when the gloves are worn for a long time, ventilation
with the outside is not made well, so wearing comfort is deteriorated due to accumulation
of moisture such as sweat on the hands of a wearer or humidity, and they are not good
in terms of sanitation, for example, skin diseases such as moist tetter on the palms
are caused due to generation and accumulation of moisture such as sweat for a long
time.
[0006] Further, outdoor gloves require waterproofness, but outdoor gloves of the related
art cause those problems because the materials that are applied to give waterproofness
do not have breathability. Further, there is a problem that since a space exists between
the inner cover and the outer cover, even if the inner cover has waterproofness, the
waterproofness is deteriorated due to moisture remaining in the space.
[Prior Art Document]
[Patent Document]
Summary of the invention
[0008] An objective of the present disclosure is to provide a manufacturing method of a
waterproof glove that has excellent wearing comfort because a membrane sheet applied
with a hot-melt adhesive is applied, that shows excellent waterproofness and humidity
discharge performance because a lining and an outshell are in close contact with each
other, of which the lining or the outshell is not separated when the glove is taken
off, and of which the manufacturing time and manufacturing cost are low because the
manufacturing process is simplified.
[0009] An objective of the present disclosure is achieved by providing a manufacturing method
of a waterproof glove that includes: a membrane glove manufacturing step of manufacturing
a glove using a polyurethane membrane sheet applied with a hot-melt adhesive; a lining
glove inserting step of inserting a lining glove into the membrane glove manufactured
to the membrane glove manufacturing step; a membrane glove inserting step of inserting
the membrane glove with the lining glove inserted through the lining glove inserting
step into an outshell glove; and a thermal bonding step of bonding the lining glove,
the membrane glove, and the outshell glove by heating the outshell glove with the
membrane glove inserted through the membrane glove inserting step.
[0010] According to a preferred characteristic of the present disclosure, the membrane glove
manufacturing step is performed by applying a hot-melt adhesive to both sides of a
polyurethane membrane sheet, stacking two polyurethane membrane sheets applied with
a hot-melt adhesive and then cutting the sheets into a hand shape, and thermally bonding
the edge of the stack of cut membrane sheets except for the portion in which the lining
glove is inserted.
[0011] According to a more preferred characteristic of the present disclosure, the polyurethane
membrane sheet is manufactured by performing electrospinning on a polyurethane solution,
the polyurethane solution is produced by mixing and heating polyurethane of 10 to
15 part by weight with a solvent of 100 part by weight, and the solvent is produced
by mixing N,N-dimethylformamide and tetrahydrofuran at 1:1 part by weight.
[0012] According to a preferred characteristic of the present disclosure, the hot-melt adhesive
is applied in a dot type.
[0013] According to a preferred characteristic of the present disclosure, the hot-melt adhesive
is composed of olefin-based resin of 100 part by weight including a propylene repeat
unit having a melting point of 70 to 120°C, hydrogenated styrene-based block copolymer
of 50 to 400 part by weight, and hydrocarbon-based adhesive resin of 400 to 800 part
by weight.
[0014] According to a preferred characteristic of the present disclosure, the hydrogenated
styrene-based block copolymer is composed of one or more selected from a group of
a styrene-ethylene-butylene-styrene block copolymer, a styrene-ethylene-propylene-styrene
block copolymer, a styrene-ethylene-propylene block copolymer, a styrene-ethylene-ethylene-propylene-styrene
block copolymer, and a styrene-butylene-butadiene-styrene block copolymer.
[0015] According to a preferred characteristic of the present disclosure, the thermal bonding
step is performed by putting the outshell glove with the membrane glove inserted through
the membrane glove inserting step on a hand-shaped mold, and then heating the mold
at temperature of 110 to 130°C.
[0016] Accordingly, the manufacturing method of a waterproof glove according to the present
disclosure shows a remarkable effect of providing a waterproof glove that has excellent
wearing comfort because a membrane sheet applied with a hot-melt adhesive is applied,
that shows excellent waterproofness and humidity discharge performance because a lining
and an outshell are in close contact with each other, of which the lining or the outshell
is not separated when the glove is taken off, and of which the manufacturing time
and manufacturing cost are low because the manufacturing process is simplified.
Brief description of the drawings
[0017] The above and other objectives, features and other advantages of the present invention
will be more clearly understood from the following detailed description when taken
in conjunction with the accompanying drawings, in which:
FIG. 1 is a flowchart showing a manufacturing method of a waterproof glove according
to the present disclosure;
FIG. 2 is a picture of a membrane glove applied with a hot-melt adhesive that is used
in the present disclosure;
FIG. 3 is a picture showing a cross-section of a glove manufactured by the manufacturing
method of a glove according to the present disclosure;
FIG. 4 is a perspective view showing a hand-shaped mold that is used in the present
disclosure; and
FIG. 5 is a perspective view showing a process in which a waterproof glove is heated
in a hand-shaped mold that is used in the present disclosure.
Detailed description of the invention
[0018] Hereafter, a preferable embodiment of the present disclosure and properties of constituents
are described in detail, but this is for describing in detail the present disclosure
such that those skilled in the art can easily achieve the present disclosure without
limiting the spirit and scope of the present disclosure.
[0019] A manufacturing method of a waterproof groove according to the present disclosure
includes: a membrane glove manufacturing step (S101) of manufacturing a glove using
a polyurethane membrane sheet applied with a hot-melt adhesive; a lining glove inserting
step (S103) of inserting a lining glove into the membrane glove manufactured to the
membrane glove manufacturing step (S101); a membrane glove inserting step (S105) of
inserting the membrane glove with the lining glove inserted through the lining glove
inserting step (S103) into an outshell glove; and a thermal bonding step (S107) of
bonding the lining glove, the membrane glove, and the outshell glove by heating the
outshell glove with the membrane glove inserted through the membrane glove inserting
step (S105).
[0020] The membrane glove manufacturing step (S101), which is a step of manufacturing a
glove using a polyurethane membrane sheet applied with a hot-melt adhesive, is composed
of processes of applying a hot-melt adhesive to both sides of a polyurethane membrane
sheet, stacking two polyurethane membrane sheets applied with a hot-melt adhesive
and then cutting the sheets into a hand shape, and thermally bonding the edge of the
stack of cut membrane sheets except for the portion in which the lining glove is inserted.
[0021] In this case, it is preferable that the hot-meld adhesive is applied in a dot type
rather than being applied throughout both sides of the polyurethane membrane sheet.
When the hot-meld adhesive is applied in a dot type, mobility is secured between the
outshell and the lining, so it is possible to provide a waterproof glove showing soft
wearing comfort.
[0022] Further, it is preferable that the polyurethane membrane sheet is manufactured by
performing electrospinning on a polyurethane solution, the polyurethane solution is
produced by mixing and heating polyurethane of 10 to 15 part by weight with a solvent
of 100 part by weight, and the solvent is produced by mixing N,N-dimethylformamide
and tetrahydrofuran at 1:1 part by weight.
[0023] The polyurethane membrane sheet composed of these constituents not only shows excellent
elasticity and waterproof performance, but passes air, thereby not only providing
soft wearing comfort and waterproof performance, but suppressing production of moisture
in the waterproof glove.
[0024] Further, the hot-melt adhesive is composed of olefin-based resin of 100 part by weight
including a propylene repeat unit having a melting point of 70 to 120°C, hydrogenated
styrene-based block copolymer of 50 to 400 part by weight, and hydrocarbon-based adhesive
resin of 400 to 800 part by weight.
[0025] The olefin-based resin may be any one selected from a polypropylene homopolymer and
an ethylene-propylene copolymer, or a compound thereof. The polypropylene homopolymer,
preferably, may be polypropylene (Metallocene polypropylene, m-PP) produced under
metallocene solvent.
[0026] Further, the olefin-based resin, in detail, may be elastic polypropylene-based resin
including a propylene repeat unit in a polymer main chain, and preferably, the elastic
polypropylene-based resin may be elastic ethylene-propylene random copolymer, but
is not limited thereto.
[0027] Further, the weight average molecular weight of the olefin-based resin, though not
limited thereto, may be 10,000 to 1,000,000 g/mol, in detail, 20,000 to 500,000 g/mol,
and in more detail, 50,000 to 300,000 g/mol.
[0028] The density of the olefin-based resin may be, at 25 °C, 0.92 g/cm
3 or less, preferably 0.91g/cm
3 or less, and more preferably 0.905 g/cm
3 or less. The lower limit of the olefin-based resin may be 0.80 g/cm
3 or more.
[0029] Further, it is preferable that the hydrogenated styrene-based block copolymer is
composed of one or more selected from a group of a styrene-ethylene-butylene-styrene
block copolymer, a styrene-ethylene-propylene-styrene block copolymer, a styrene-ethylene-propylene
block copolymer, a styrene-ethylene-ethylene-propylene-styrene block copolymer, and
a styrene-butylene-butadiene-styrene block copolymer.
[0030] Further, it may be preferable that the hydrocarbon-based adhesive resin is obtained
by hydrogenating hydrocarbon-based resin including a styrene-based monomer and a polycyclic
aromatic monomer as repeat units. As a detailed example, the styrene-based monomer
may be styrene or methyl styrene and the polycyclic aromatic monomer may be indene.
For example, hydrogenated hydrocarbon-based resin obtained by hydrogenating methyl
styrene and indene copolymer resin is preferable.
[0031] The hot-melt adhesive composed of those constituents has not only excellent adhesion
and excellent resistance against water, thereby suppressing separation between the
outshell or the lining and the polyurethane membrane glove due to deterioration of
adhesive when it is exposed to water.
[0032] Further, the softening point of the hot-melt adhesive composite is 110 to 130°C.
Since the hot-melt adhesive used in the present disclosure has a softening point in
this range, as compared with that the softening point of hot-melt adhesive composites
used in the related art is high as 150 to 250°C, a bonding process can be performed
by melting the hot-melt adhesive at a relatively low temperature, so it is possible
to prevent damage to the outshell or the lining and the polyurethane membrane glove.
[0033] Further, the hot-melt adhesive may further contain one or more of selected from a
group of well-known lubricant, wax, plasticizer, and antioxidant.
[0034] The lubricant may be paraffin-based oil or naphthene-based oil. The lubricant may
be included by 1 to 30 percent by weight, preferably, 10 to 30 percent by weight for
the total weight of the hot-melt adhesive.
[0035] The wax may be paraffin wax. The wax may be included by 1 to 10 percent by weight,
preferably, 2 to 8 percent by weight for the total weight of the hot-melt adhesive
composite.
[0036] Further, the plasticizer may be glycerin, glycerin diacetate, pentaerythritol, sorbitol,
and ethylene glycol and may be included by 1 to 10 percent by weight for the total
weight of the hot-melt adhesive composite.
[0037] Further, the antioxidant may be thioester, phosphate, aromatic amine, hindered phenol,
tetrakis(methylene-3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate)methane, 2,2'-ethylidenebis
(4,6-di-tert-butyl phenol), 1,1-tris(2-methyl-4-hydroxy--t-butyl phenyl) butane, 1,3,5-trimethyl-2,4,6-tris(3,5-tert-butyl-4-hydroxybenzyl)benzene,
dilauryl thiodipropionate, pentaerythritol tetrakis(β-lauryl thiodipropionate) polyphosphate,
and thiophosphite, and may be included by 1 to 5 percent by weight for the total weight
of the hot-melt adhesive composite.
[0038] The lining glove inserting step (S103) is a step of inserting a lining glove into
the polyurethane membrane glove manufactured through the membrane glove manufacturing
step (S101), in which the material of the lining glove is not specifically limited
and may be made of any material as long as it is a component that can be bonded to
the polyurethane membrane glove by the hot-melt adhesive, but it is preferable the
lining glove may have a smaller internal space than the polyurethane membrane glove
to be able to seated in the polyurethane membrane glove manufactured through the membrane
glove manufacturing step.
[0039] The membrane glove inserting step (S105) is a step of inserting the membrane glove
with the lining glove inserted therein through the lining glove inserting step (S103)
into the outshell glove, in which the material of the outshell glove is not specifically
limited and may be made of any material as long as it is a component that can be bonded
to the polyurethane membrane glove by the hot-melt adhesive, but it is preferable
the lining glove may have a larger internal space than the polyurethane membrane glove
such that the polyurethane membrane glove manufactured through the membrane glove
manufacturing step can be seated therein.
[0040] The thermal bonding step (S107) is a step of bonding the lining glove, the membrane
glove, and the outshell glove by heating the outshell glove with the membrane glove
inserted through the membrane glove inserting step (S105), and is composed of processes
of putting the outshell glove with the membrane glove inserted through the membrane
glove inserting step (S105) on a hand-shaped mold, as shown in FIGS. 4 and 5, heating
the mold at temperature of 110 to 130°C for 5 to 10 minutes, and then cooling it to
the room temperature.
[0041] When the glove is heated at temperature of 110 to 130°C through this process, the
hot-melt adhesive applied in a dot type on both sides of the membrane glove is melted,
thereby binding the outshell glove and the lining glove.
[0042] Hereafter, the manufacturing method of a waterproof groove according to the present
disclosure and the properties of a waterproof glove manufactured by the manufacturing
method are described with reference to embodiments.
<Manufacturing example 1> Manufacturing of hot-melt adhesive
[0043] A hot-melt adhesive was manufactured by mixing olefin-based resin (metallocene polypropylene)
including a propylene repeat unit having a melting point of 95°C of 100 part by weight,
hydrogenated styrene-based block copolymer (styrene-ethylene-butylene-styrene block
copolymer) of 250 part by weight, and hydrocarbon-based adhesive resin (methyl styrene
and indene copolymer resin) of 600 part by eight.
<Manufacturing example 2> Manufacturing of polyurethane membrane sheet
[0044] A membrane sheet having a thickness of 20
µm was manufactured by manufacturing a polyurethane solution by mixing and heating
polyurethane of 12.5 part by weight to a solvent(N,N-dimethylformamide and tetrahydrofuran
at 1:1 part by weight) of 100 part by weight, and then performing electrospinning
on the manufactured polyurethane solution.
<Manufacturing example 3> Manufacturing of polyurethane membrane glove
[0045] A polyurethane membrane glove was manufactured by coating the hot-melt adhesive manufactured
through the manufacturing example 1 on both sides of the polyurethane membrane sheet
manufactured to the manufacturing example 2 in a dot type, stacking and cutting two
polyurethane membrane sheets applied with the hot-melt adhesive in a hand shape, and
then thermally bonding the edge of the stack of cut membrane sheets except for the
portion in which the lining glove is inserted.
<Manufacturing example 4> Manufacturing of polyurethane membrane glove
[0046] A polyurethane membrane glove was manufactured by performing the process of the manufacturing
example 3 and coating the hot-melt adhesive manufactured through the manufacturing
example 1 on the front surface of the polyurethane membrane sheet manufactured to
the manufacturing example 2.
<Manufacturing example 5>
[0047] A polyurethane membrane glove was manufactured by stacking and then cutting two polyurethane
membrane sheets manufactured to the manufacturing example 2 and then thermally bonding
the edge of the stack of cut membrane sheets except for the portion in which the lining
glove is inserted.
<Embodiment 1>
[0048] A waterproof glove was manufactured by inserting a lining glove made of polyurethane
inside the polyurethane membrane glove manufactured through the manufacturing example
3, inserting the polyurethane membrane glove with the lining glove inserted therein
into an outshell glove made of polyurethane, putting the outshell glove, in which
the polyurethane membrane glove with the lining glove inserted therein is inserted,
on a hand-shaped mold, heating the hand-shaped mold at 120°C for 8 minutes, separating
the glove from the mold, and the cooling the mold to the room temperature.
<Comparative example 1>
[0049] A waterproof glove was manufactured by performing the process of the embodiment 1
and using the polyurethane membrane glove manufactured through the manufacturing example
4.
<Comparative example 2>
[0050] A waterproof glove was manufactured by inserting a lining glove made of polyurethane
inside the polyurethane membrane glove manufactured through the manufacturing example
5, and then inserting the polyurethane membrane glove with the lining glove inserted
therein into an outshell glove.
[0051] Waterproof performance, separation strength, and flexibility of the waterproof gloves
manufactured through the embodiment 1 and comparative examples 1 and 2 were manufactured
and shown in the following Table 1.
[0052] {However, a method of checking whether water permeates into the gloves manufactured
through the embodiment 1 and comparative examples 1 and 2 after immersing the gloves
in water for 1 minutes under the condition that water does not permeate into the portion
in which a hand is inserted was used, separation strength was manufactured at 25°C
using a tensile strength tester, the tensile strength between the polyurethane membrane
gloves and the outshell gloves was measured, and separation strength was measured
10 times by pulling the polyurethane membrane gloves at a speed of 300 mm/min with
the outshell glove fixed to a jig at a side of the tensile strength tester and was
shown as an average value.
[0053] Further, the degrees of flexibility were observed out of 10 after 50 examinees wore
the gloves and repeated folding/unfolding fingers, and were shown as an average value,
in which 0∼3 points were shown by ×, 4∼7 points were shown by △, and 8∼10 points were
shown by ○.
<Table 1>
Items |
Waterproofness |
Separation strength (g/25mm) |
Flexibility |
Embodiment 1 |
○ |
173 |
○ |
Comparative example 1 |
○ |
201 |
△ |
Comparative example 2 |
○ |
- |
○ |
[0054] As shown in Table 1, the waterproofness and separation strength of the waterproof
glove manufactured through the embodiment 1 of the present disclosure were excellent
and the flexibility was also excellent. However, as for the glove manufactured through
the comparative example 1, waterproofness was secured because water did not permeate
into the lining glove in the waterproofness test process, but there was a problem
that a space existed between the outshell glove and the polyurethane membrane glove,
so water permeated into the space.
[0055] Accordingly, the manufacturing method of a waterproof glove according to the present
disclosure provides a waterproof glove that has excellent fit because a membrane sheet
applied with a hot melt adhesive is applied, that shows excellent waterproofness and
humidity discharge performance because a lining and an outshell are in close contact
with each other, of which the lining or the outshell is not separated when the glove
is taken off, and of which the manufacturing time and manufacturing cost are low because
the manufacturing process is simplified.