JP2603455B2 - Bobbin and prebulky processing method and cheese dyeing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin used for performing pre-bulky processing and cheese dyeing, a pre-bulky processing method, and a cheese dyeing method.

[0002]

2. Description of the Related Art In dyeing stretchable yarn such as spandex (or bulky yarn such as acrylic yarn), a cheese dyeing method, which requires fewer steps than the skein dyeing method and has a short dyeing time, is generally used. I have. In this cheese dyeing method,
First, the yarn is wound from the spinning bobbin to the dyeing bobbin. The yarn wound around this bobbin for dyeing becomes cheese. Then, after inserting the cheese into the pipe-shaped carrier, the dyeing solution is pumped to the carrier. Thereby, the dyeing liquid passes through the carrier and is supplied to the yarn through the dyeing bobbin. Thereby, the yarn is dyed.

The above-mentioned dyeing bobbin is disclosed in
And bobbins described in JP-B-116284 and JP-B-60-29793. JP-A-51-1
In Japanese Patent No. 16284, a bobbin made of a synthetic resin is formed in a net shape, and the bobbin is gradually deformed at the time of dyeing, whereby unevenness in density of the yarn, excessive tension applied to the yarn, pressure and the like are released, and the yarn expands and contracts at the time of dyeing. It is intended to prevent deterioration of the properties, decrease in bulkiness, and color unevenness of the yarn.

A bobbin described in Japanese Patent Publication No. 60-29793 is formed by winding or mounting a water-soluble resin such as a polyvinyl alcohol resin on a dyeing tube (bobbin). When dyeing the yarn, the water-soluble resin is dissolved by the dyeing liquor. Thus, when the yarn is dyed, the excessive tension applied to the yarn is released, and the deterioration of the elasticity and the decrease in bulkiness of the yarn during dyeing and the uneven color of the yarn can be prevented.

[0005] Japanese Patent Publication No. 50-29073 discloses a special bobbin used for performing prebulky treatment of a heat-shrinkable bulky yarn. This bobbin is formed of a thermoplastic synthetic resin that deforms and recovers by heat. After winding the heat-shrinkable bulky yarn on the bobbin, the yarn is sprayed with steam to perform a prebulky treatment. At this time, the bobbin is deformed by high-temperature steam. That is, the bobbin is softened by the heat of the steam, so that the bobbin shrinks inward due to the shrinkage force of the heat-shrinkable bulky yarn. This makes it possible to reduce the resistance when the yarn shrinks, and to obtain a bulky yarn having a desired bulkiness. After this pre-bulky treatment, the yarn is wound from the bobbin to a bobbin for dyeing, and cheese dyeing is performed. The bobbin deformed (withdrawn) by the pre-bulky treatment is heated again and softened. In this state, the bobbin is put into a conical or cylindrical mold and returned to the original predetermined shape. Thereby, the bobbin can be reused, and the cost can be reduced.

[0006]

However, the dyeing bobbin described in JP-A-51-116284 is not only deformed inward due to the shrinkage force of the yarn, but also vertically inserted by inserting it into a cheese and carrier. Pressure is also applied. Therefore, the bobbin may be deformed unevenly.
In this case, rattling occurs between the thread and the bobbin,
There has been a problem that the carrier and the bobbin come into firm contact with each other and it is difficult to remove the cheese from the carrier.

Further, since the water-soluble resin wound around the bobbin described in Japanese Patent Publication No. 60-29793 is not always completely dissolved in the dyeing liquor, it adheres to the yarn to cause color unevenness in the yarn, There was a problem that the stain was stained.
Further, there is a problem that the bobbin for dyeing cannot be reused because it is dissolved in one dyeing step, and the cost is high. Further, there is also a problem that the yarn is firmly in contact with the carrier due to the shrinkage force of the yarn and it is difficult to remove the yarn from the carrier.

In addition, since the pre-bulky bobbin cannot be restored to its original shape unless the bobbin is heated and put into a mold after the pre-bulky process, the operation of restoring the bobbin shape is troublesome. Was. Furthermore, the bobbin is deformed unevenly or withered too much, causing rattling between the yarn and the bobbin, and the operation of winding the yarn on another bobbin cannot be performed smoothly. (Knitting machine, loom, etc.).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to prevent deterioration of stretchability and shrinkage of yarn, prevent uneven dyeing, and perform pre-bulky treatment. Another object of the present invention is to provide a bobbin that can be easily returned to the original shape without putting the bobbin in a mold or the like after cheese dyeing.

A second object of the present invention is to provide a pre-bulky processing method capable of smoothly winding a yarn on another bobbin after the pre-bulky processing. The third purpose is
An object of the present invention is to provide a cheese dyeing method capable of smoothly extracting cheese from a carrier after cheese dyeing.

[0011]

In order to achieve the above object, according to the first aspect of the present invention, at a predetermined temperature for processing a stretchable or shrinkable yarn in a wound state. A glass transition point is set around a predetermined temperature at which the yarn is processed, and at a temperature higher than the glass transition point, the glass softens and returns to its original predetermined shape, and has a temperature lower than the glass transition point. Therefore, the gist of the invention is that it is formed of a shape memory resin that retains the shape at that time.

According to a second aspect of the present invention, in the pre-bulky treatment method in which steam is blown onto a heat-shrinkable bulky yarn wound around a bobbin to express bulkiness in the yarn, the glass transition point is determined when the steam transition occurs during the pre-bulky treatment. It is set near the temperature, softens at a temperature above the glass transition point and returns to its original shape, and forms the bobbin with a shape memory resin that retains its shape at a temperature below the glass transition point,
When the steam is sprayed on the yarn, the gist is that a core having an outer diameter smaller than the inner diameter of the bobbin and which is not deformed at the steam temperature is inserted into the bobbin.

According to a third aspect of the present invention, in the method for dyeing cheese with stretchable or bulky yarn, the bobbin around which the stretchable or bulky yarn is wound is set such that the glass transition point is set to a temperature near the dyeing liquid temperature. At a temperature above the transition point, it softens and returns to its original shape, and at a temperature below the glass transition point, it is formed of a shape-memory resin that retains its shape. The diameter is small,
The gist of the present invention is to insert the bobbin around which the yarn is wound and then insert the bobbin into the core after inserting the core that does not deform at the dyeing liquid temperature into the carrier.

[0014]

According to the first aspect of the present invention, the bobbin softens near a predetermined temperature at which the yarn is processed. Thus, when the yarn is processed, the bobbin is deflated by the tension of the yarn wound around the bobbin, the tension of the yarn is released, and the elasticity or shrinkage of the yarn is maintained. When the bobbin is returned to the original predetermined shape, after the yarn is wound from the bobbin to another bobbin or the like or directly fed to the knitting machine, the withdrawn bobbin is heated again to a glass point or higher. This allows
The bobbin returns to its original shape.

According to the second aspect of the present invention, when the heat-shrinkable bulky yarn develops bulkiness, the core is inserted into a bobbin around which the heat-shrinkable bulky yarn is wound. Then, steam is sprayed on the heat-shrinkable bulky yarn. This steam causes the heat-shrinkable bulky yarn to shrink. At this time, when the temperature of the bobbin becomes equal to or higher than the glass transition point by steam, the bobbin softens and shrinks inward due to the shrinkage force of the heat-shrinkable bulky yarn. As a result, bulkiness is exhibited without applying excessive tension to the heat-shrinkable bulky yarn. In addition, the amount of withdrawal of the bobbin at this time is regulated by contact with the core. This prevents the bobbin from being deformed unevenly or excessively withered, thereby preventing a gap from being formed between the bobbin and the yarn.

After the pre-bulky treatment, when the temperature of the bobbin falls below the glass transition point, the bobbin hardens while maintaining its shape. In this state, the yarn is wound from the bobbin to another bobbin or the like. When the yarn is wound and the empty bobbin in the deformed state is blown with steam or the like and heated above the glass transition point, the bobbin softens and returns to the original bobbin shape.

According to the third aspect of the present invention, when the stretchable yarn or the bulky yarn is dyed with cheese, first, the core is inserted into the carrier. Next, the bobbin around which the yarn is wound is inserted through the core. Therefore, in this state, the carrier is located at the innermost position, and then the core, bobbin, and thread are in this order.
There is a gap of a predetermined distance between the inner peripheral surface of the bobbin and the core. Also, a gap is provided between the carrier and the core such that the core can move smoothly with respect to the carrier. When cheese dyeing is performed in this state, the bobbin softens due to the temperature of the dyeing liquor and shrinks due to the shrinkage force of the yarn. Thereby, the tension applied to the yarn is released, and the elasticity of the stretchable yarn or the shrinkage of the bulky yarn can be maintained.

The amount of withdrawal of the bobbin is regulated by contact with the core. As a result, the bobbin and the core come into close contact,
Uneven deformation and excessive wiping of the bobbin are prevented, and the bobbin and the core move integrally with the carrier.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the pre-bulky processing bobbin 11 is formed in a substantially cylindrical shape, is integrally formed with a plurality of winding portions 12 extending in the axial direction thereof, and is formed integrally with the winding portions 12. It is composed of a plurality of connecting portions 13 to be connected. Further, a plurality of spaces 14 are formed on the peripheral surface of the bobbin 11. The pre-bulky bobbin 11 synthesizes an isocyanate compound, a polyol compound, and a chain extender, and the glass transition point (hereinafter, referred to as “Tg”) is the steam temperature (9
(0 to 110 ° C.) or lower, and is formed from a shape memory resin containing a urethane elastomer. In this embodiment, a diary (trade name) manufactured by Mitsubishi Heavy Industries, Ltd. is used as the shape memory resin forming the pre-bulky bobbin 11.

FIG. 2 is a graph showing the relationship between the temperature of the pre-bulky processing bobbin 11 and the longitudinal elastic modulus. As shown in the drawing, when the temperature of the pre-bulky processing bobbin 11 is lower than Tg, the longitudinal elastic coefficient of the pre-bulky processing bobbin 11 increases. On the other hand, when the temperature of the pre-bulky bobbin 11 is equal to or higher than Tg, the longitudinal elastic coefficient of the pre-bulky bobbin 11 becomes small. That is,
When the temperature of the pre-bulky bobbin 11 is lower than Tg, the pre-bulky bobbin 11 is in a glass state (hardened), and when the temperature is equal to or higher than Tg, the pre-bulky bobbin 11 is in a rubber state (softened).

When pre-bulky processing of yarn is performed using the pre-bulky processing bobbin 11, the heat-shrinkable bulky yarn (hereinafter referred to as acrylic bulky yarn) is first transferred from the spinning bobbin 51 to the pre-bulky processing bobbin 11. Rewind L (see FIG. 3). When the rewinding of the thread L onto the pre-bulky processing bobbin 11 is completed, the core N is arranged in the bobbin 11. The outer diameter of the core N is smaller than the inner diameter of the bobbin 11, and when the core N is disposed in the bobbin 11, a space is formed between the two (see FIG. 4). From this state, the thread L
Is sprayed with steam at about 100 ° C. for several minutes. Thereby, the yarn L thermally contracts. At this time, when the temperature of the bobbin 11 exceeds Tg (about 80 ° C.), the bobbin 11 softens,
The thread L contracts inward due to the contracting force (see FIG. 5). As a result, the unreasonable tension applied to the yarn L at the time of winding on the bobbin 11 is released, and the contraction operation of the yarn L is performed smoothly, so that the yarn L can exhibit a predetermined bulkiness. .

When the pre-bulky processing is completed and the steam blowing is stopped and the temperature of the yarn L and the bobbin 11 becomes lower than Tg, the longitudinal elastic modulus of the bobbin 11 decreases. That is, the bobbin 11 is hardened while in a withered state. From this state, the yarn L wound around the bulky processing bobbin 11 is wound onto the cheese dyeing bobbin 21 shown in FIG. 8 (hereinafter, the yarn L wound around the cheese dyeing bobbin 21 is referred to as cheese C). . Thread L for cheese dyeing bobbin 21
After rewinding, the bobbin 11 for prebulky treatment which has been withered is heated again to Tg or more with steam or the like, so that the bobbin 11 is softened. At this time, the bobbin 11 has a thread L
Is not wound, no external force acts on the bobbin 11. As a result, the bobbin 11 naturally returns to the original predetermined shape (see FIG. 6).

As shown in FIG. 6, the cheese dyeing bobbin 21 is formed in substantially the same shape as the pre-bulky bobbin 11, so that the detailed shape and the like will be omitted, and the material thereof will be omitted. And the like are also omitted. A difference between the cheese dyeing bobbin 21 and the pre-bulky bobbin 11 is a set temperature of Tg. The Tg of the cheese dyeing bobbin 21 is set to a temperature (about 60 ° C.) at which the dye at the time of dyeing the cheese begins to dye. Accordingly, the bobbin 21 for dyeing cheese is about 60
It softens at a temperature of at least 60 ° C. and hardens in its shape at a temperature below about 60 ° C.

Next, a dyeing machine for performing cheese dyeing will be schematically described. As shown in FIGS. 7 and 8, the dyeing machine M includes a tank T, a plurality of carriers K arranged in the tank T, and the like. Carrier K is through hole 31
And a pipe 33 and the like standing upright on the base 32 in a state of communicating with the through-hole 31 on a disk-shaped base 32 having the following. A plurality of communication holes 34 that communicate the inside and outside of the pipe 33 are formed in the peripheral surface of the pipe 33. That is, the hollow portion of the pipe 33 is communicated with the outside through the communication hole 34. A pump P is connected to a hollow portion of the pipe 33. The pump P pumps up a dye from a dye storage device (not shown) and passes through a through hole 31 to a pipe 33.
To the hollow part of. The dye solution fed to the pipe 33 is discharged from the communication hole 34 to the outside.

Next, the action of the yarn L when dyeing cheese will be described. First, as shown in FIG. 7 and FIG.
The core N is inserted through the pipe 33. This core N is the same as the core N used in the prebulky processing. Although not described at the time of the pre-bulky processing, a plurality of through holes 41 are formed in the peripheral surface of the core N. The inner diameter of the core N is formed to be larger than the outer diameter of the pipe 33, and the core N can be smoothly inserted into and removed from the pipe 33. The height of the core N is substantially the same as the height of the bobbin 21.

After the core N is inserted through the pipe 33, the cheese C is inserted through the core N. Therefore, in this state, the pipe 33 is disposed at the innermost position, and then the core N,
The bobbin 21 and the thread L are in order. There is a gap of a predetermined distance between the inner peripheral surface of the bobbin 21 and the core N. Pipe 3
After the core N and the cheese C have been inserted into 3, the spacer S is inserted into the pipe 33. This spacer S is a bobbin 2
The diameter is substantially the same as the diameter of the yarn L wound up in 1. Hereinafter, the core 33, the cheese C, and the spacer S are inserted through the pipe 33 in the same manner as described above. Accordingly, the lowermost core N and the cheese C are sandwiched between the base 32 of the carrier K and the spacer S, and the upper core N and the cheese T are sandwiched between the upper and lower spacers S. When a predetermined number (5 in this embodiment) of cheese C is inserted into the carrier K, the carrier K is arranged at a predetermined position in the tank T.

Next, the pump P is driven, and the dye solution is transferred to the carrier K.
To pump. The dye solution pumped to the carrier K is
And is discharged to the outside from each communication hole 34. The dye solution discharged from the pipe 33 to the outside is passed through the through hole 41 of the core N.
And passes through the space 14 of the bobbin 21 to reach the yarn L. Thereby, the yarn L is dyed. At this time, the bobbin 21 is heated by the dyeing liquor and softens when the temperature exceeds Tg. When the bobbin 21 softens, the yarn L contracts due to the action of the tension applied to the yarn L, the bobbin 21 withers inward, and the tension applied to the yarn L is released. At this time, the withering of the bobbin 21 is regulated by coming into contact with the core N (see FIG. 9). Thereby, the bobbin 21
And the core N are brought into close contact and integrated. When the dye has been poured for a predetermined time, the driving of the pump P is stopped, and the dye in the tank T is discharged.

Next, the cheese C is washed. The cleaning of the cheese C is performed by pumping the cleaning water from the pump P. At this time, the temperature of the washing water is lower than Tg (about 20 ° C.).
Therefore, the bobbin 21 in the softened state is
It cures while remaining in close contact with the surface. After the cheese C has been washed for a predetermined time, the carrier K is taken out of the tank T. Next, all the cheese C is extracted from the pipe 33 of the carrier K. At this time, since a gap is provided between the pipe 33 and the core N, the cheese C can be smoothly extracted from the pipe 33. Subsequently, each cheese C is dehydrated by a centrifugal separator or the like, and then dried. Then, finally, the yarn L is wound from the cheese C onto a knitting bobbin (not shown). The cheese dyeing is performed as described above.

After the yarn L has been wound into a knitting bobbin, the cheese dyeing bobbin 21 which has been withdrawn is heated again to Tg or more in the same manner as the pre-bulky bobbin 11.
The bobbin 21 softens, and the bobbin 21 naturally returns to the original predetermined shape.

In this embodiment, the following effects can be obtained by performing pre-bulky processing and cheese dyeing as described above. (1) The pre-bulky bobbin 11 was formed from a shape memory resin, and the Tg of the bobbin 11 was set near the steam temperature at the time of pre-bulky processing. Thereby, the bobbin 11 is softened during the pre-bulky processing, and the tension applied to the yarn L can be released. As a result, the yarn L can exhibit a predetermined bulkiness. After the pre-bulky processing, the deformed bobbin 11 is heated to Tg or more, so that the bobbin 11 can be easily returned to the original bobbin shape.

(2) The bobbin 21 for dyeing cheese was formed from a shape memory resin in the same manner as the bobbin 11 for prebulky treatment, and the Tg of the bobbin 21 was set around the dyeing liquid temperature at the time of cheese dyeing. Thereby, the bobbin 21 is softened at the time of cheese dyeing, and the excessive tension applied to the yarn L can be released. As a result, the shrinkability of the yarn L can be maintained, and the yarn L can exhibit a predetermined bulkiness.

The pre-bulky bobbin 11
Similarly, the cheese bobbin 21 can be easily returned to the original bobbin shape by heating again after the cheese dyeing.

Further, since the tension applied to the yarn L at the time of cheese dyeing can be released, the winding density of the yarn is reduced and the flow of the dyeing liquid is improved. As a result, the yarn L
Color unevenness can be prevented.

(3) At the time of prebulky treatment and cheese dyeing, the core N having a smaller diameter than the inner diameter of the bobbins 11 and 21 is arranged in the bobbins 11 and 21, and the amount of withering of the bobbins 11 and 21 is brought into contact with the core. It was configured to regulate by the thing. Thereby, it is possible to prevent the bobbins 11 and 21 from being deformed unevenly or withering excessively, thereby preventing a gap from being generated between the bobbins 11 and 21 and the thread L.
The rattling of the thread L with respect to one can be prevented, and the work of winding the thread L to another bobbin can be easily performed.

(4) Since the inner diameter of the core N is larger than the outer diameter of the pipe 33 of the carrier K, the core N can be smoothly inserted into and removed from the carrier K. Therefore, the cheese C can be easily extracted from the pipe 33 after cheese dyeing.

(5) At the time of cheese dyeing, the cheese C is inserted into the pipe 33 of the carrier K in plural stages. Therefore,
A larger load is applied from above to the cheese C arranged on the lower side. Therefore, when the cheese dyeing bobbin 21 is softened, the cheese C is crushed from above and below, which adversely affects the cheese C. However, in this embodiment, the core N
Due to the contact between the cheese C and the spacer S, the load applied to the cheese C from above and below can be absorbed even if the bobbin 21 is softened. As a result, the cheese dyeing bobbin 21 can be smoothly deflated, and further occurrence of color unevenness of the yarn L and deterioration of elasticity can be prevented.

The present invention can be implemented as follows. (1) The cheese dyeing in the above embodiment was embodied with the heat-shrinkable bulky yarn L pre-bulky treated, but the heat-shrinkable bulky yarn was subjected to cheese dyeing without pre-bulky treatment with steam, and the pre-bulky treatment and the dyeing were simultaneously performed. When doing,
The present invention is also effective when a stretchable yarn (such as spandex) is dyed with cheese.

(2) Although the bobbins 11 and 21 are entirely formed of a shape memory resin, only the connecting portion 13 is formed of a shape memory resin, and the winding portion 12 is formed of a normal synthetic resin or metal. Even when it is embodied, the same effect as the above embodiment can be obtained.

(3) Even when the bobbins 11 and 21 are softened, they may be made of a shrinkable shape memory resin even if the yarn tension is not applied. In this case, when the yarn is dyed, the tension applied to the yarn can be reduced.

The technical ideas other than the claims grasped by the above embodiments are described below together with their effects. (1) In the bobbin according to the above (1), the yarn is a heat-shrinkable bulky yarn that exhibits bulkiness by prebulky treatment, and the glass transition point is set near a steam temperature at the time of prebulky treatment. Bobbin.

According to this configuration, when the heat-shrinkable bulky yarn is expressed in bulkiness, the heat-shrinkable bulky yarn is wound around a bobbin and steam is sprayed on the heat-shrinkable bulky yarn. This steam causes the heat-shrinkable bulky yarn to shrink. At this time, when the temperature of the bobbin becomes equal to or higher than the glass transition point by steam, the bobbin softens and shrinks due to the shrinkage force of the heat-shrinkable bulky yarn. As a result, the bulkiness can be expressed without applying excessive tension to the heat-shrinkable bulky yarn. After the pre-bulky treatment, when the temperature of the bobbin falls below the glass transition point, the bobbin hardens while maintaining its shape. In this state, the yarn is wound from the bobbin to another bobbin. The yarn is wound up,
By blowing steam or the like onto the empty bobbin in the deformed state and heating it to a temperature equal to or higher than the glass transition point, the bobbin can be returned to the original bobbin shape.

(2) The bobbin according to claim 1, wherein the yarn is a stretched yarn or a bulky yarn, and the glass transition point is set near a dyeing liquid temperature at the time of cheese dyeing. .

According to this configuration, when the stretched yarn or the bulky yarn is dyed with cheese, if the temperature of the bobbin becomes equal to or higher than the glass transition point by the dyeing liquid, the bobbin softens and shrinks due to the shrinkage force of the yarn. Thereby, the tension applied to the yarn is released, and deterioration of the elasticity and shrinkage of the yarn due to cheese dyeing can be prevented. When the temperature of the bobbin becomes lower than the glass transition point after the cheese dyeing, the bobbin hardens while maintaining its shape. In this state, the yarn is wound from the bobbin to another bobbin or the like. The yarn is wound up,
By blowing steam or the like onto the empty bobbin in the deformed state and heating it to a temperature equal to or higher than the glass transition point, the bobbin can be returned to the original bobbin shape.

[0044]

According to the first aspect of the present invention, it is possible to prevent the deterioration of the elasticity and shrinkage of the yarn and to prevent uneven dyeing, and to apply the bobbin to a mold or the like after prebulky treatment and cheese dyeing. It is possible to easily return to the original shape without inserting.

According to the second aspect of the present invention, the yarn can be smoothly wound onto another bobbin after the pre-bulky processing. According to the third aspect of the invention, after the cheese is dyed, the cheese can be smoothly extracted from the carrier, and the yarn can be smoothly wound on another bobbin or supplied to another machine.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bobbin for prebulky processing according to an embodiment.

FIG. 2 is a graph showing a relationship between a longitudinal elastic modulus and a temperature.

FIG. 3 is a perspective view when a thread is wound around a bobbin for prebulky processing.

FIG. 4 is a perspective view in which a center is disposed in a pre-bulky processing bobbin.

FIG. 5 is a perspective view of a state where prebulky processing has been performed from the state of FIG. 4;

FIG. 6 is a perspective view of a pre-bulky processing bobbin in a deflated state.

FIG. 7 is a schematic sectional view of a dyeing machine.

FIG. 8 is a cross-sectional view showing a state where cheese is inserted into a carrier.

FIG. 9 is a cross-sectional view showing the cheese in a state that has been withered from the state of FIG. 8;

[Explanation of symbols]

11: bobbin for prebulky treatment, 21: bobbin for cheese dyeing, C: cheese, L: thread, N: core, K: carrier, Tg: glass transition point.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location D06P 7/00 D06P 7/00 (72) Inventor Yoshio Hayashi 2--21 Nagara Miyaguchicho, Gifu City ( 56) References JP-B 37-2120 (JP, B1)

Claims (3)

(57) [Claims] 1. A bobbin placed at a predetermined temperature for processing a yarn having elasticity or shrinkage in a wound state, wherein the glass transition point is around a predetermined temperature at which the yarn is processed. A bobbin formed of a shape memory resin that softens and returns to its original shape at a temperature equal to or higher than the glass transition point, and retains the current shape at a temperature lower than the glass transition point. 2. A pre-bulky treatment method in which steam is sprayed on a heat-shrinkable bulky yarn wound on a bobbin to express bulkiness in the yarn, wherein a glass transition point is set near a steam temperature during the pre-bulky treatment, When the temperature is higher than the glass transition point, the resin softens and returns to its original shape, and when the temperature is lower than the glass transition point, the bobbin is formed of a shape memory resin that retains the shape, and when the yarn is sprayed with steam, The outer diameter is smaller than the inner diameter of the bobbin,
And pre-bulky processing performed by inserting a core that does not deform at the steam temperature into a bobbin. 3. A method for dyeing a stretchable yarn or a bulky processed yarn using a cheese, wherein the bobbin around which the stretchable yarn or the bulky processed yarn is wound has a glass transition point set near the dyeing liquid temperature, and is softened at a temperature higher than the glass transition point. It returns to its original shape and is formed of a shape memory resin that retains its shape at a temperature lower than the glass transition point.When dyeing yarn, the outer diameter is smaller than the inner diameter of the bobbin, and the dye is dyed. A cheese dyeing method in which a core that does not deform at the liquid temperature is inserted into a carrier, and a bobbin around which the yarn is wound is inserted through the core.