U.S. patent application number 11/664897 was filed with the patent office on 2009-01-15 for method of washing a textile product and textile product treatment apparatus used therefore.
This patent application is currently assigned to HISAKA WORKS, LTD.. Invention is credited to Toru Shimizu.
Application Number | 20090013479 11/664897 |
Document ID | / |
Family ID | 36142766 |
Filed Date | 2009-01-15 |
United States Patent
Application |
20090013479 |
Kind Code |
A1 |
Shimizu; Toru |
January 15, 2009 |
Method of washing a textile product and textile product treatment
apparatus used therefore
Abstract
There are provided a washing method using a treatment apparatus
of the type, such as a liquid current treatment apparatus for
treating a textile product by circulating a treating liquid that is
capable of effectively washing a textile product in a shorter time,
as well as a textile product treatment apparatus used therefore. A
textile product 1 is loaded into a treatment tank 4 and a
high-temperature treating liquid, which circulates inside and
outside of the treatment tank 4, is brought into contact with the
textile product, thus treating the textile product, and then the
textile product is washed with a washing water, in which subsequent
to the treatment by the high-temperature treating liquid, the
high-temperature treating liquid is gradually discharged from the
treatment tank 4 while the washing water is gradually supplied into
the treatment tank 4, during which the discharged high-temperature
treating liquid is heat exchanged with the supplied washing water,
and the amount of the high-temperature treating liquid to be
discharged is set to be equal to the amount of the washing water to
be supplied so that the amount of liquid within the treatment tank
4 is kept constant.
Inventors: |
Shimizu; Toru; (Osaka,
JP) |
Correspondence
Address: |
PERKINS COIE LLP
P.O. BOX 1208
SEATTLE
WA
98111-1208
US
|
Assignee: |
HISAKA WORKS, LTD.
Osaka
JP
|
Family ID: |
36142766 |
Appl. No.: |
11/664897 |
Filed: |
October 7, 2005 |
PCT Filed: |
October 7, 2005 |
PCT NO: |
PCT/JP05/18659 |
371 Date: |
April 5, 2007 |
Current U.S.
Class: |
8/159 ;
68/15 |
Current CPC
Class: |
D06B 23/22 20130101;
D06B 3/28 20130101 |
Class at
Publication: |
8/159 ;
68/15 |
International
Class: |
D06B 5/00 20060101
D06B005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 7, 2004 |
JP |
2004-295212 |
Claims
1. A textile product washing comprising loading a textile product
into a treatment tank, bringing a high-temperature treating liquid,
which circulates inside and outside of the treatment tank, into
contact with the textile product, thus treating the textile
product, and then washing the textile product with a washing water,
wherein subsequent to the treatment by the high-temperature
treating liquid, the high-temperature treating liquid is gradually
discharged from the treatment tank while the washing water is
gradually supplied into the treatment tank, during which the
discharged high-temperature treating liquid is heat exchanged with
the supplied washing water, and the amount of the high-temperature
treating liquid to be discharged is set to be equal to the amount
of the washing water to be supplied so that the amount of liquid
within the treatment tank is kept constant.
2. The textile product washing method according to claim 1, wherein
at the time when the liquid within the treatment tank has been
lowered to a given temperature range by the discharge of the
high-temperature treating liquid and the supply of the washing
water, the washing water is directly supplied into the treatment
tank without being heat exchanged with the high-temperature
treating liquid, thus washing the textile product.
3. A textile product washing apparatus used for the textile washing
method of claim 1, which comprises: a treatment tank into which a
textile product is loaded so that the textile product is brought
into contact with a treating liquid; a treating liquid circulation
passage through which the treating liquid is taken out from the
treatment tank to the outside and repeatedly supplied into the
treatment tank via a circulation pump and a heat exchanger; a
treating liquid discharge conduit that is connected on an intake
side of the circulation pump to the treating liquid circulation
passage so as to take out a part of the treating liquid from the
treating tank and discharge the same to the outside; a washing
water supply conduit that is connected on the intake side of the
circulation pump and the downstream side of the connection portion
of the treating liquid discharge conduit to the treating liquid
circulation passage so as to supply a washing water into the
treating liquid circulation passage; and a heat exchanger for heat
exchanging the treating liquid passing through the treating liquid
discharge conduit with the washing water passing through the
washing water supply conduit, wherein the amount of the treating
liquid to be discharged through the treating liquid discharge
conduit and the amount of the washing water to be supplied through
the washing water supply conduit are controlled to be equal to each
other.
4. A textile product washing apparatus used for the textile washing
method of claim 2, which comprises: a treatment tank into which a
textile product is loaded so that the textile product is brought
into contact with a treating liquid; a treating liquid circulation
passage through which the treating liquid is taken out from the
treatment tank to the outside and repeatedly supplied into the
treatment tank via a circulation pump and a heat exchanger; a
treating liquid discharge conduit that is connected on an intake
side of the circulation pump to the treating liquid circulation
passage so as to take out a part of the treating liquid from the
treating tank and discharge the same to the outside; a washing
water supply conduit that is connected on the intake side of the
circulation pump and the downstream side of the connection portion
of the treating liquid discharge conduit to the treating liquid
circulation passage so as to supply a washing water into the
treating liquid circulation passage; and a heat exchanger for heat
exchanging the treating liquid passing through the treating liquid
discharge conduit with the washing water passing through the
washing water supply conduit, wherein the amount of the treating
liquid to be discharged through the treating liquid discharge
conduit and the amount of the washing water to be supplied through
the washing water supply conduit are controlled to be equal to each
other.
Description
TECHNICAL FIELD
[0001] The present invention relates to a method of washing a
textile product, such as a woven fabric, which is to be carried out
subsequent to another treatment such as dyeing, and a textile
product treatment apparatus used therefore.
BACKGROUND ART
[0002] As an apparatus for carrying out a treatment such as dyeing
for a textile product, for example, a liquid current treatment
apparatus as illustrated in FIG. 4 is generally used. This
apparatus has a retention part 2 for a woven fabric 1, and an
annular treatment tank 4 connected between the retention part 2 and
a transfer passage 3 for the woven fabric 1. The retention part 2
has a bottom portion provided with treating liquid suction portions
5 (three in this Figure), through which a treating liquid is
sucked. The sucked treating liquid is heated under control to a
given temperature (generally, a maximum temperature for it is set
at a high temperature of 100.degree. C. or higher) and returned to
a treating liquid injection part 8 mounted at an end of the
transfer passage 3 via a circulating pump 6 and a heat exchanger 7,
so that the woven fabric 1 is treated with a liquid current
thereof, while being transferred.
[0003] In this liquid current treatment, the treating liquid has
various dyes, other chemical agents or auxiliary agents remaining
therein at the time when the treatment has been finished. In
addition, it contains as products resulting from fiber
polymerization, oligomer, shag and scale generated from the woven
fabric 1.
[0004] Therefore, when carrying out, for example, polyester deep
dyeing, a cooling water is introduced into the heat exchanger 7
subsequent to the finish of this treatment, thereby lowering the
temperature of the treating liquid, while circulating the treating
liquid; and then once the treating liquid has been lowered to
around 80.degree. C., it is kept at this temperature, while
hydrosulfite or an alkaline chemical (caustic soda, soda ash or the
like) is injected into the treatment tank 4, thereby carrying out a
reduction treatment for the aforesaid remaining products. Thus, a
so-called reduction cleaning is carried out. Subsequent to this
reduction cleaning, the treating liquid is again cooled to around
60.degree. C. and discharged. Then, supplying a washing water
(generally, water), water washing and discharging water are
repeated several times, thereby washing a fabric product, and then
the fabric product is taken out from the treatment tank 4.
[0005] However, the above washing method may pose problems of
necessitating a long time washing, not realizing a smooth
temperature gradient in cooling, causing wrinkles in the textile
product, and thus deteriorating the quality of the fiber product.
Also, since oligomer and the like, which have been dissolved at
high temperature, are again precipitated, left in the treatment
tank 4 and adhered thereto, a so-called tank washing is to be
frequently carried out, which is very troublesome and thus poses a
problem. Therefore, there is a strong demand for solving these
problems.
[0006] Meanwhile, the present inventors already proposed and put
into practical use an all-new washing method for an air current
treatment apparatus that carries out a treatment by spraying a
gas-liquid mixed fluid of a treating liquid and air current onto a
textile product while moving and circulating the textile product
within the treatment tank, which method involves discharging the
treatment liquid at high temperature, and then supplying a washing
water while heat exchanging with the discharged treatment liquid
(cf. Patent Document 1).
[0007] Patent Document 1: Japanese Patent Application Laid-open No.
Hei-8-269863)
SUMMARY OF THE INVENTION
Problems to be Solved by the Invention
[0008] Accordingly, it is conceivable to apply the washing method
in the above air current treatment apparatus to the liquid current
treatment apparatus. However, it has been found that since the
amount of a treating liquid used in the air current treatment
apparatus is small and the apparatuses are different from each
other in structure, it is difficult to apply the above washing
method to the liquid current treatment apparatus without
modification.
[0009] The present invention has been conceived in consideration of
the above. It is an object of the present invention to provide a
washing method using a treatment apparatus of the type, such as a
liquid current treatment apparatus for treating a textile product
by circulating a treating liquid that is capable of effectively
washing a textile product in a shorter time, as well as a textile
product treatment apparatus used therefore.
Means for Solving the Problems
[0010] In order to achieve the above object, according to a first
aspect of the present invention, there is provided a textile
product washing method, which includes loading a textile product
into a treatment tank, bringing a high-temperature treating liquid,
which circulates inside and outside of the treatment tank, into
contact with the textile product, thus treating the textile
product, and then washing the textile product with a washing water,
wherein subsequent to the treatment by the high-temperature
treating liquid, the high-temperature treating liquid is gradually
discharged from the treatment tank while the washing water is
gradually supplied into the treatment tank, during which the
discharged high-temperature treating liquid is heat exchanged with
the supplied washing water, and the amount of the high-temperature
treating liquid to be discharged is set to be equal to the amount
of the washing water to be supplied so that the amount of liquid
within the treatment tank is kept constant.
[0011] According to another aspect of the present invention, there
is provided a textile product washing method, in which at the time
when the liquid within the treatment tank has been lowered to a
given temperature range by the discharge of the high-temperature
treating liquid and the supply of the washing water, the washing
water is directly supplied into the treatment tank without being
heat exchanged with the high-temperature treating liquid, thus
washing the textile product.
[0012] According to a third aspect of the present invention, there
is provided a textile product washing apparatus used for the
textile product washing method of the first aspect or second
aspect, which includes: a treatment tank into which a textile
product is loaded so that the textile product is brought into
contact with a treating liquid; a treating liquid circulation
passage through which the treating liquid is taken out from the
treatment tank to the outside and repeatedly supplied into the
treatment tank via a circulation pump and a heat exchanger; a
treating liquid discharge conduit that is connected on an intake
side of the circulation pump to the treating liquid circulation
passage so as to take out a part of the treating liquid from the
treating tank and discharge the same to the outside; a washing
water supply conduit that is connected on the intake side of the
circulation pump and the downstream side of the connection portion
of the treating liquid discharge conduit to the treating liquid
circulation passage so as to supply a washing water into the
treating liquid circulation passage; and a heat exchanger for heat
exchanging the treating liquid passing through the treating liquid
discharge conduit with the washing water passing through the
washing water supply conduit, wherein the amount of the treating
liquid to be discharged through the treating liquid discharge
conduit and the amount of the washing water to be supplied through
the washing water supply conduit are controlled to be equal to each
other.
Advantages of the Invention
[0013] Specifically, according to the textile product washing
method of the present invention, the high-temperature treating
liquid used for the treatment is discharged while maintaining high
temperature thereof, and during the discharge, it is heat exchanged
with a washing water that is supplied into the treatment tank for
washing. Thus, it is possible to remarkably increase the
temperature in the washing treatment compared with the conventional
method and thus produce an excellent washing effect. Therefore, the
number of times of washing to be repeated subsequent to the
discharge of the high-temperature washing water can be reduced as
compared with the conventional method. Since the treating liquid is
discharged while maintaining high temperature thereof, oligomer or
dyeing residues or the like are kept dissolved in the treating
liquid when discharged, and therefore a reduction cleaning
treatment required in a conventional polyester deep dyeing or the
like can be omitted. Thus, steam or a chemical agent used for
increasing the temperature in the reduction cleaning treatment is
not required, which contributes to the cost reduction. Since the
amount of the oligomer or dyeing residue adhered to the inner wall
of the treatment tank and thus remaining in the treatment tank is
decreased, there is an advantage in that the workload in
maintenance such as cleaning the treatment tank on regular basis is
reduced. In addition, since the amount of the high-temperature
treating liquid to be discharged is controlled to be equal to the
amount of the washing water to be supplied, the amount of liquid
circulating in the treatment tank can be kept constant even when
the process changes from the dyeing or the like treatment to the
washing treatment, and thus the textile product is prevented from
being subjected to excessive stress and is provided with a good
finish.
[0014] Of the above washing methods, according to the washing
method that includes directly supplying the washing water into the
treatment tank without heat exchanging the washing water with the
high-temperature treating liquid, at the time when the liquid
within the treatment tank has been lowered to a given temperature
range by the discharge of the high-temperature treating liquid and
the supply of the washing water, it is possible to lower the liquid
to a given low temperature range in a shorter time when the
high-temperature treating liquid is cooled to a low temperature
range (e.g., when cooling from 80.degree. C. to 60.degree. C.). In
addition, since the washing water is directly supplied into the
treatment tank, the washing can be carried out simultaneously with
the cooling. Thus, the washing efficiency can be further improved.
In the conventional method, when the temperature is lowered to a
low temperature range, it is difficult to cool in a smooth
temperature gradient, and therefore a wrinkle is easy to be caused
in the textile product. However, this method of the present
invention produces an advantage in that the smooth temperature
gradient is created and thus a wrinkle is hardly caused.
[0015] The textile product treatment apparatus of the present
invention is achieved by merely adding a simple constitutional
element to the conventional treatment apparatus, and therefore the
above special washing method can be carried out efficiently at low
cost.
[0016] FIG. 1 illustrates an explanatory view for illustrating a
treatment apparatus according to one embodiment of the present
invention.
[0017] FIG. 2 illustrates an operation schedule according to the
above embodiment.
[0018] FIG. 3 illustrates an operation schedule according to a
conventional treatment apparatus.
[0019] FIG. 4 is an explanatory view illustrating a conventional
treatment apparatus.
DESCRIPTION OF REFERENCE NUMERALS
[0020] 1: Woven fabric
[0021] 4: Treatment tank
[0022] 6: Circulation pump
[0023] 7, 14: Heat exchangers
[0024] 11: Treating liquid discharge conduit
[0025] 12: Washing water supply conduit
[0026] BEST MODE FOR CARRYING OUT THE INVENTION
[0027] Now, the description will be made for a best mode for
carrying out the present invention.
[0028] FIG. 1 illustrates a liquid current treatment apparatus
according to one embodiment of the present invention. This
apparatus includes a retention part 2 for a woven fabric 1, and an
annular treatment tank 4 to which the retention part 2 and a
transfer passage 3 of the woven fabric 1 are connected. A treating
liquid is sucked through treating liquid suction portions 5 (three
in this Figure) provided in a bottom portion of the retention part
2, and circulated via a circulation pump 6 and a heat exchanger 7
to a treating liquid injection part 8 that is disposed at an end of
the transfer passage 3, while maintained at a given temperature.
Thus, the woven fabric 1 is treated while being transferred by its
liquid current.
[0029] A treating liquid discharge conduit 11 for taking out a part
of the circulating treating liquid and discharging the same to the
outside is connected on the intake side of the circulation pump 6
to a treating liquid circulation passage 10 provided with the
circulation pump 6 and the heat exchanger 7, and a washing water
supply conduit 12 for supplying a washing water into the treating
liquid circulation passage 10 is connected on the downstream side
of the connection portion thereof via a check valve 13 to the
treating liquid circulation passage 10.
[0030] Both the treating liquid discharge conduit 11 and the
washing water supply conduit 12 extend through a heat exchanger 14,
at which the temperature of the high-temperature treating liquid is
lowered while the temperature of a room-temperature washing water
is increased. The treating liquid discharge conduit 11 and the
washing water supply conduit 12 are respectively provided with
shut-off valves 15, 16 and fluid meters 17, 18, so that the amount
of the treating liquid to be discharged and the amount of the
washing water to be supplied can be controlled to be equal to each
other. A reference numeral 19 represents a pump for supply of a
washing water and a reference numeral 20 represents a water supply
valve.
[0031] The treatment and washing of a textile product can be made
for example in the following manner by using the aforesaid liquid
current treatment apparatus. Specifically, in the same manner as a
conventional liquid current treatment apparatus, the woven fabric 1
is first loaded into the treatment tank 4, and the treatment is
made in the same manner as a regular treatment with the shut-off
valves 15, 16 kept closed. Then, upon the finish of the treatment,
the water supply valve 20 is opened, the pump 19 is started, and
the shut-off valves 15, 16 are opened so that a part of the
treating liquid circulating within the treating liquid circulation
passage 10 is taken out into the treating liquid discharge conduit
11, and at the same time the washing water is supplied into the
treating liquid circulation passage 10. At this moment, they are
passed through the heat exchanger 14 so that heat exchanging is
made between the high-temperature treating liquid to be discharged
and the room-temperature washing water. In addition, the flow
control is made by using the fluid meters 17, 18 and the shut-off
valves 15, 16 so that the amount of the treating liquid to be
discharged and the amount of the washing water to be supplied are
controlled to be equal to each other. Whereby, it is possible to
carry out the washing while keeping the amount of liquid
circulating within the treatment tank 4 (the mixed liquid in which
the treating liquid is gradually replaced with the washing water)
constant.
[0032] Then, at the time when the temperature of the circulating
liquid has reached a given low temperature range (e.g., 60.degree.
C.), the discharge of the treating liquid and the supply of the
washing water are stopped, and the liquid is directly discharged
through a liquid discharge port (not shown) provided in the middle
of the treating liquid circulation passage 10 according to needs
and circumstances, and a fresh washing water is supplied at a
constant flow rate, thereby carrying out the washing treatment,
then the discharging, the supplying and the washing are again
carried out, and then the woven fabric 1 is taken out. Thus, a
series of treatments are finished.
[0033] According to the above washing method, the heat exchanging
between the high-temperature treating liquid to be discharged and
the washing water to be supplied allows the temperature in the
washing treatment to be remarkably increased than in the
conventional method, and hence produces an excellent washing
effect. Accordingly, it is possible to reduce the number of times
of washing to be repeated subsequent to the discharge of the
high-temperature washing water as compared with the conventional
method. Since the treating liquid is discharged while keeping the
temperature thereof high, oligomer, dyeing residue or the like are
kept dissolved in the treating liquid when discharged, a reduction
cleaning treatment required in conventional polyester deep dyeing
or the like can be omitted. Thus, steam or chemical agents used for
increasing the temperature in the reduction cleaning treatment is
not required, which contributes to the cost reduction. Since the
amount of the oligomer or dyeing residue adhered to the inner wall
of the treatment tank or the like and remaining in the treatment
tank is decreased, there is an advantage in that the workload in
maintenance such as cleaning the treatment tank 4 on regular basis
is reduced. In addition, since the amount of the high-temperature
treating liquid to be discharged is controlled to be equal to the
amount of the washing water to be supplied, the amount of liquid
circulating in the treatment tank 4 can be kept constant even when
the process changes from the dyeing or the like treatment to the
washing treatment, and thus the textile product is prevented from
being subjected to excessive stress and is provided with a good
finish.
[0034] In the present invention, by the "high-temperature treating
liquid" is meant a liquid that has been heated by the heat
exchanger 7 provided in the treating liquid circulation passage 10
and set at a high temperature compared with the liquid temperature
when supplied. This temperature may be appropriately set depending
on the type of the treatment, the type of the textile product, or
the like.
[0035] In the present invention, by the "washing water" is meant
water of a lower temperature than the high-temperature treating
liquid to such an extent to allow the temperature of the
high-temperature treating liquid to be lowered by the heat
exchanging with the high-temperature treating liquid. However, the
temperature of the washing water is not necessarily limited to a
specific temperature, while water of room temperature is usually
used. For the purpose of improving the washing effect, or providing
a specific texture or function, water having an appropriate
chemical agent added thereinto may be used.
[0036] Furthermore, in the present invention, as the method for
keeping the amount of liquid within the treatment tank 4 constant
by setting the amount of the high-temperature treating liquid to be
discharged and the amount of washing water to be supplied to be
equal to each other, it is not necessary limited to a
afore-mentioned method involving carrying out the flow control for
both of them by using the fluid meters 17, 18 and the shut-off
valves 15, 16, but an appropriate method may be employed. There is
conceivable a method in which a liquid level sensor is disposed
within the treatment tank 4, and the shut-off valves 15, 16 are
controlled to keep the liquid level constant all the time. However,
for the liquid current treatment apparatus, the treating liquid is
circulated in the treatment tank 4 while having a ruffled surface,
and therefore it is difficult to specify the liquid level. In light
of this, the control by the combination of the fluid meters 17, 18
and the shut-off valves 15, 16 is preferable.
[0037] In the above examples, at the time when the liquid
temperature has reached a low temperature range by the discharge of
the high-temperature liquid and the supply of the washing water,
the discharge of the liquid is carried out while a fresh washing
water is supplied at a constant flow rate, thereby carrying out the
washing treatment. As another example, at the time when the liquid
temperature has been lowered to a middle temperature range (e.g.,
80.degree. C.) being higher than the low temperature range at which
the liquid can be discharged, the shut-off valve 15 is closed,
thereby stopping taking out of the high-temperature treating liquid
from the treating liquid discharge conduit 11, and the washing
water is directly supplied into the treatment tank 4 at a constant
flow rate without being heat exchanged with the high-temperature
treating liquid, so that the circulating liquid can be cooled. The
washing water is not necessarily supplied at a constant flow rate.
In this respect, the amount of the increased liquid within the
treatment tank 4 is gradually decreased through a drain valve.
Then, at the time when the temperature of the circulating liquid
has been reached to a given low temperature range (e.g., 60.degree.
C.), the supply of the washing water is stopped, and in the same
manner as the above example, the liquid is directly discharged
through the liquid discharge port according to needs and
circumstances, then a fresh washing water is supplied, thereby
carrying out the washing treatment, then the discharging, the
supplying and the washing are again carried out, and then the woven
fabric 1 is taken out. Thus, a series of treatments are
finished.
[0038] According to the above method, it is possible to not only
lower the liquid temperature to a given low temperature range in a
shorter time, but also carry out the washing simultaneously with
the cooling since the washing water is directly supplied into the
treatment tank 4. Thus, the washing efficiency can be further
improved. According to the conventional method, when the liquid
temperature is lowered to a low temperature range, it is difficult
to realize a smooth temperature gradient in cooling, causing the
textile product to be easily wrinkled. However, according to this
method, there is an advantage in that a smooth temperature gradient
can be realized and hence a wrinkle is hardly caused.
[0039] In the present invention, it is not necessary to limit a
textile product to be treated to a specific type, but for example,
various synthetic fabrics such as polyester, polyamide, acryl or
the like fabric, their blended yarn fabric, combined weave fabric
or blended knit fabric, or cellulose based fabrics such as cotton
fabric, rayon fabric and hemp fabric, their blended yarn fabric,
combined weave fabric or blended knit fabric. Any shape of the
textile product, or any form such as weaved cloth, knitted cloth,
nonwoven cloth or a product (garment) may be used as well.
[0040] In the present invention, as the aforesaid apparatus for
treating a textile product and carrying out the washing, it is
possible to use any type as long as it carries out the treatment by
a treating liquid circulating inside and outside of the treatment
tank. For example, in addition to the liquid current treatment
apparatus as mentioned in the above example, it is possible to use
various type of the treatment apparatus, such as a packaging
apparatus that treats a filiform textile product by packaging the
same into a skein form, cheese form or corn form, a beam treatment
apparatus, or a treatment apparatus that treats a textile product
formed by such as thread or weaved yarn, or extends the same into a
flat shape by a suspension system, then forming it into a laminate,
and then treats the textile product in this laminate form.
Furthermore, they can be also applied to the air current treatment
apparatus.
[0041] In the present invention, as the treatment to a textile
product, in addition to the dyeing treatment, it is widely applied
to various processes, such as a relaxation process, a resin
process, a refinery process and the like in an apparatus other than
the liquid current treatment apparatus.
[0042] Now, the description will be made for an example along with
a comparative example.
EXAMPLE
Example
[0043] The dyeing and washing of a textile product was carried out
following the conditions mentioned below by using a liquid current
treatment apparatus as illustrated in FIG. 1.
[0044] Textile product: polyester woven fabric (plain fabric of
polyester yarn 56 dtex/48f) 100 kg
[0045] Progress schedule: following FIG. 2
[0046] Chemical agents used in the dyeing step: [0047] Dye
compound: 5 kg [0048] Dispersing agent (Nicca Sunsalt RM-340, made
by Nicca Chemical Co., Ltd.): 600 g [0049] Acetic acid: 600 g
[0050] Liquor-goods ratio: 1/12
Comparative Example
[0051] The dyeing and washing of a textile product was carried out
following the conditions mentioned below by using a conventional
liquid current treatment apparatus as illustrated in FIG. 4.
[0052] Textile product: same as that of the Example
[0053] Progress schedule: following FIG. 3
[0054] Chemical agents used in the dyeing step: same as those of
the Example
[0055] Chemical agents used in a reduction cleaning step: [0056]
NaOH: 1200 g [0057] Hydrosulfite: 1200 g
[0058] Liquor-goods ratio: Same as that of the Example
[0059] By checking the amount of each of steam, cooling water and
the like in each of the Example and the Comparative Example, they
were summarized as a contrast in the following Table 1.
TABLE-US-00001 TABLE 1 Comparative Example Example Reduction Amount
Amount Ratio Items Steps Used Total A Used Total B A/B Steam (kg)
Heating 264.6 284.6 264.6 292.5 0.97 Kept at 130.degree. C. 20.0
20.0 Kept at 80.degree. C. 0 7.9 Cooling Temperature Lowering 3323
11023 3818 17268 0.64 Water (Litter) Supplying Dyeing process 1200
1200 Water Slow Cooling 0 2500 (Litter) Water Washing 6500 9750
Power (kw) All the Steps 23.6 23.6 29.0 29.0 0.81 Dyeing Dyeing
Process 5000 5000 5000 5000 1.00 Component (g) Auxiliary RM340 Same
as 600 Cost: 600 Cost: 0.53 Agents (g) the Above JPY555 JPY1053
Acetic Acid Same as 600 600 the Above Reducing NaOH Reduction 0
1200 Agents (g) Cleaning Hydrosulfite Same as 0 1200 the Above
[0060] From the above result, according to the Example, it is
possible to reduce the amount of any of steam, water, power and
chemical agents used, as compared with the Comparative Example. As
can be seen from the progress schedules of FIGS. 2 and 3, the time
required for washing treatment is greatly shortened, so that great
cost-down can be achieved. In addition, the processed product
obtained by the method of the Example causes no wrinkles or the
like due to the temperature gradient and thus is of a high
quality.
[0061] Furthermore, the evaluation was made on color fastness to
rubbing (according to JIS L0849) and color fastness to water
(according to JIS L0846) for each of the processed product obtained
by the method of the Example and the processed product obtained by
the method of the Comparative Example, and those results were
summarized in the following Table 2. For the products of the
Example, each of them to which the process was terminated at an
intermediate point was evaluated in the same manner.
TABLE-US-00002 TABLE 2 Color Fastness Color Fastness to Water to
Rubbing Fading Contamination Example From 4-5 5 3-4
High-temperature Liquid Discharging to After the Washing with
Direct Cooling After One Time 4-5 5 3-4 Washing After Two Time 5 5
4 Washing Comparative Example 5 5 4
[0062] From the above result, it can be seen that the product of
the Example (water washing was carried out two times) has a color
fastness to rubbing equivalent to the product of the Comparative
Example (the processed product by the conventional method; water
washing was carried out three times), although the washing for the
product of the Example is repeated one less time than for the
product of the Comparative Example.
* * * * *