JP6026947B2 - Method for producing step dyed yarn - Google Patents

Description

  The present invention relates to a method for producing a step dyed yarn (yarn dyed in a plurality of colors in horizontal stripes) that can be used for a suture line that appears on the surface of a vehicle interior material.

As a method for producing this type of dyed yarn (yarn dyed with a plurality of colors), the production method disclosed in Patent Document 1 is known. In this known technique, the dyed yarn is partially whitened, and then the dye is rubbed into the whitened portion to dye the yarn in stripes.
In addition, in this type of manufacturing method, a method is known in which an undyed yarn is made into a ring-shaped bundle and then dyed with a plurality of dyes. For example, a non-dyed thread is made into a bundle of bundles (a bundle formed by winding the yarn in a ring shape multiple times), and both folded portions of the bundle are dyed with the same color, and the two folded portions are striped in different colors. Stain to. The dyed yarn (step dyed yarn) created in this way is dyed in a different color for each predetermined length (having an excellent design), so it is suitable for, for example, a suture line (stitch) appearing on the surface of a vehicle interior material. Can be used for

JP-A-60-2787

By the way, in the publicly known technique, a non-dyed yarn is bundled and then dyed with a plurality of dyes. At this time, the length of the yarn is not uniform at both folded portions (the outer side is longer and the inner side is shorter), so that the specific dyed portion becomes longer and shorter than necessary when viewed in the length direction of the step dyed yarn (the step). Dyeing habits may occur). And when using step dyed yarn for the stitching of the vehicle interior material, it tends to be inferior in design because the partial length of the dyed portion appears outside.
The present invention has been devised in view of the above points, and the problem to be solved by the present invention is to make the length of partial dyeing of step dyed yarn as inconspicuous as possible.

As means for solving the above problems, the method for producing a step dyed yarn of the first invention is a method for producing a step dyed yarn that can be used for a suture line that appears on the surface of a vehicle interior material.
In the present invention, the non-dyed yarn is formed into a ring shape, the first folded portion, the second folded portion different from the first folded portion, and a pair of intermediate portions disposed between the first folded portion and the second folded portion. Forming a bundle of cocoons. The wrinkle bundle is dyed in horizontal stripes with a plurality of disperse dyes. At this time, it is desirable that the length of the partial dyeing of the step dyed yarn is as inconspicuous as possible.

Therefore, in the present invention, when dyeing the cocoon bundle with a plurality (a plurality of types) of disperse dyes, the first folded portion and the second folded portion are dyed in the same or different colors, and the first folded portion is respectively formed on the pair of intermediate portions. The point site | part dye | stained with the color different from the color of a part and a 2nd folding | turning part is provided.
The point part occupies 10% or more and 50% or less of the total length of the step dyed yarn corresponding to one winding of the bundle, and the color of the point part is the highest among the colors arranged in the bundle. Has lightness or saturation.
In the present invention, point portions that are relatively conspicuous as compared with both folded portions are formed in each intermediate portion. Thus, by forming a point part (a part that is easily noticeable) at a part different from both folded parts, it is possible to make the stained part of the folded part (the part where the length of staining partially occurs) as inconspicuous as possible. .

The method for producing step dyed yarn according to the second invention is the method for producing step dyed yarn according to the first invention, wherein the point portion is 10% or more with respect to the total length of the step dyed yarn corresponding to one turn of the kite bundle. It occupies 29.2% or less.
The method for producing a step dyed yarn of the third invention is the method for producing the step dyed yarn of the first invention or the second invention, wherein a plurality of point portions are formed at appropriate intervals in each intermediate portion, A plurality of base parts different from the point part as viewed in the direction in which the cocoon bundle extends are provided intermittently across the point part.
Therefore, in the present invention, when each base part is dyed in a horizontal stripe pattern with a plurality of colors, the base part color arrangement pattern having the first folded part or the second folded part and the base adjacent to the point part are sandwiched therebetween. The color scheme pattern of the parts was made different.
In the present invention, the base portion having the first folded portion (or the second folded portion) is different from the color arrangement pattern of the base portion adjacent thereto. For this reason, even if both base parts (color arrangement pattern) are compared, it becomes difficult to discriminate the difference between the two parts (the length of the stained portion of the folded portion).

According to the first aspect of the present invention, the length of partial dyeing of the step dyed yarn can be made as inconspicuous as possible. According to the second invention, the length of the partial dyeing of the step dyed yarn can be made less noticeable. Further, according to the third invention, the length of partial dyeing of the step dyed yarn can be made less noticeable.

It is a perspective view of a vehicle seat. It is sectional drawing of a part of seat cover. It is an arrangement plan of a dyeing machine and a cocoon bundle. (A) is a drawing of a kite bundle, and (b) is a drawing of a step dyed yarn. (A) is a figure of the kite bundle of the modification 1, (b) is a figure of a step dyeing yarn. (A) is a figure of the kite bundle of the modification 2, (b) is a figure of a step dyeing yarn. (A) is a figure of the kite bundle of the modification 3, (b) is a figure of a step dyeing yarn.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In FIG. 1, a reference symbol F is attached to the front of the vehicle seat, a reference symbol B is attached to the rear of the vehicle seat, a reference symbol UP is provided above the vehicle seat, and a reference symbol DW is provided below the vehicle seat. Also, the same reference numerals are given to the upper and lower parts of FIG.
A vehicle seat 2 in FIG. 1 (an example of a vehicle interior material) includes a seat cushion 4, a seat back 6, and a headrest 8. Each of these seat components covers a seat frame (4F, 6F, 8F) that forms a seat skeleton, a seat pad (4P, 6P, 8P) that elastically supports an occupant by forming a seat outer shape, and a seat pad. Seat covers (4S, 6S, 8S).

Here, each seat cover (4S, 6S, 8S) is a face material formed by sewing a plurality of skin pieces into a bag shape. Examples of the material of this type of seat cover include fabrics (woven fabrics, knitted fabrics and nonwoven fabrics) made of natural fibers or synthetic fibers, leathers (natural leathers, synthetic leathers), and composite materials thereof.
In this embodiment, at the time of sewing the respective seat covers (4S, 6S, 8S), a plurality of or single out-stitch DS (stitching line) is appropriately formed to provide a sheet structure with excellent design (in FIG. 1, for convenience) , Only some outstitches are labeled).
For example, the seat cover 6S of the seat back 6 has a first skin piece PS1 constituting a main part (sitting part) and a second skin piece PS2 constituting a side part (a convex part on the side of the main part). (See FIGS. 1 and 2). Therefore, the out stitch DS (SEW1, SEW2) is formed along the stitched portion of the adjacent first skin piece PS1 and second skin piece PS2. At this time, one stitch SEW1 can be formed by stitching the end portion of the first skin piece PS1 in the middle of the same skin piece. Similarly, the other stitch SEW2 can be formed by stitching the end portion of the second skin piece PS2 in the middle of the same skin piece.

Here, the out stitch DS can be formed by sewing or hand sewing (see FIG. 2).
For example, in this embodiment, each stitch (SEW1, SEW2) of the main stitch is formed using two kinds of sewing threads (upper thread Y1, lower thread Y2). Each stitch can be formed by crossing the upper thread Y1 and the lower thread Y2 while passing the sewing needle through the skin pieces PS1 and PS2. At this time, most of the upper yarn Y1 (out-stitch yarn) (about 70%) is exposed to the outside of the sheet, and the remaining portion crosses the lower yarn Y2 while being drawn into the sheet. The stitch pitch L1 (length dimension of the exposed upper thread) is not particularly limited, but can be set to 4.5 to 5 cm, for example.

In this embodiment, the upper yarn Y1 (out-stitch yarn) exposed to the outside of the sheet is formed using a step dyed yarn DY described later from the viewpoint of further improving the design properties (see FIGS. 1 and 2). ).
Here, the step dyed yarn DY is prepared by dyeing in a striped manner with a plurality of disperse dyes as described later, but at this time, a specific dyed portion becomes longer or shorter than necessary (the step dyed wrinkle is May occur). However, when the step dyed yarn DY is used for each seat cover (4S, 6S, 8S), considering the design of the sheet, it should be avoided as much as possible that the partial length of the dyed portion is more noticeable than necessary.
Therefore, in this embodiment, the length of partial dyeing of the step dyed yarn DY is made as inconspicuous as possible with the configuration described later. Hereinafter, each configuration will be described in detail.

[Step dyed yarn]
The step dyed yarn DY is a yarn dyed in a horizontal stripe pattern with a plurality of types of disperse dyes (a plurality of colors), and has the following parts (point part, base part) (see FIGS. 3 and 4). ).
Here, the disperse dye is a dye that is insoluble or hardly soluble in water (azo dye or anthraquinone dye), and is used in a state of being dispersed in a solvent such as water by various dispersants (surfactants). The In this type of disperse dye, as the dye content in the solvent increases, the color brightness (detailed later) of the step dyed yarn DY increases (the dye content and the brightness have a proportional relationship).
The material of the step dyed yarn DY is not particularly limited as long as it can be dyed with disperse dyes. Examples of this type of thread (material) include plant-based and animal-based natural fibers, chemical fibers made of thermoplastic resin or thermosetting resin, and mixed fibers thereof.

[Manufacture of step dyed yarn]
In the present embodiment, the undyed yarn is formed into a ring shape, and a bundle of bundles YB including a first folded portion 11, a second folded portion 12, and a pair of intermediate portions 14a and 14b is formed (FIGS. 3 and 4). See).
Here, the size and the like of the bundle of bundles YB are not particularly limited. For example, a bundle of bundles YB of about 450 g can be formed with a non-dyed yarn made of polyester.
The first folded portion 11 is a folded portion (arc shape) on one side of the bundle of bundles YB, and forms a larger arc shape as the yarn arranged on the outer side (a difference in the circumferential length of the yarn occurs in the same portion). Moreover, the 2nd folding | turning part 12 is the folding | turning part (arc shape) of the other side of the bundle YB, and forms the larger circular arc shape, so that the thread | yarn arrange | positioned on the outer side produces the circumference length difference of the thread | yarn.
The pair of intermediate portions (the first intermediate portion 14a and the second intermediate portion 14b) are linear portions disposed between the folded portions 11 and 12, respectively, and are substantially parallel with the folded portions 11 and 12 being sandwiched therebetween. To place.

Next, after arranging the cocoon bundle YB on a base (reference numeral omitted), it is dyed using the upper dyeing machine DM. The dyeing machine DM has a plurality of injection ports (first injection port M1 to 13th injection port M13), and can disperse the disperse dye from each of the injection ports toward the bundle YB.
In the present embodiment, the first injection port M <b> 1 is disposed on the first folding part 11, and the thirteenth ejection port M <b> 13 is disposed on the second folding part 12. The second injection port M2 to the twelfth injection port M12 are arranged on the pair of intermediate portions 14a and 14b in this order. Then, the disperse dye is allowed to flow from the respective injection ports toward the wrinkle bundle YB to dye the folded portions 11 and 12 and the intermediate portions 14a and 14b, thereby dyeing the wrinkle bundle YB into horizontal stripes.
By the way, in the above-mentioned structure, the length of each thread | yarn becomes non-uniform | heterogenous in both the folding | returning parts 11 and 12 (it becomes long on the outer side and becomes short on the inner side). For this reason, when the bundle YB is unwound and used as the step dyed yarn DY, a specific dyed portion (a dyed portion corresponding to both folded portions) is shortened in the length direction.

Therefore, in this embodiment, a plurality of point portions (P1 to P6, details will be described later) are formed at appropriate intervals in each of the intermediate portions 14a and 14b (see FIG. 4). A plurality of base parts (UP1 to UP6, details will be described later) are intermittently provided on the bundle YB with the point parts (P1 to P6) interposed therebetween.
Then, each base part (UP1 to UP6) is appropriately dyed in a horizontal stripe pattern using blue (first color X) and turquoise (second color Y (forms a specific two-color color arrangement pattern). Each point part (P1 to P6) was dyed with green (third color Z described later).

Here, the first color X, the second color Y, and the third color Z are arranged adjacent to each other as appropriate on the bundle YB. At this time, it is desirable to reduce the difference in dye content in each disperse dye by setting the lightness difference (ΔL ^* , details will be described later) of each color to 30 or less. By reducing the difference in the dye content in each disperse dye in this way, the disperse of the disperse dye (transfer from dark to light) in the yarn is suppressed as much as possible, and the border between adjacent colors becomes ambiguous (the color blurs). ) Can be suitably prevented.
Further, the length dimension of each color (the dyeing range seen in the direction in which the yarn extends) can be determined in consideration of the stitching pitch L1 of the stitch (see FIGS. 2 and 4). For example, when the stitch pitch L1 is set to 4.5 to 5 cm, the length of each color is set to 3 cm or more. By doing so, the step dyed yarn portion dyed in each color in the stitches SEW1, SEW2 (upper yarn Y1) can be more reliably exposed to the outside (outside the sheet). If the length dimension of each color is less than 3 cm, all the step dyed yarn portions dyed with a specific color are arranged in the portion drawn into the sheet of the upper yarn Y1, and the color of the same portion is external. May not be exposed.

(Point part)
In the present embodiment, a plurality of point portions P1 to P6 are formed by injecting the third color Z from the third injection port M3, the seventh injection port M7, and the eleventh injection port M11 (see FIG. 4). .
Thus, when the eyelid bundle YB is viewed clockwise, a plurality of point portions P1 to P6 are formed in this order. And in the 1st intermediate part 14a, the 1st point site | part P1-the 3rd point site | part P3 are arrange | positioned at an appropriate space | interval in this order. Similarly, the fourth point portion P4 to the sixth point are arranged in the second intermediate portion 14b at appropriate intervals in this order.
In the present embodiment, the first point portion P1 and the sixth point portion P6 are formed in a face-to-face manner at the third outlet M3. Similarly, the second point part P2 and the fifth point part P5 are formed in a face-to-face manner at the seventh injection port M7. Then, at the eleventh injection port M11, the third point part P3 and the fourth point part P4 are formed in a face-to-face manner.

And in a present Example, the sum total of the length dimension of point part P1-P6 is set to the range of 10 to 50% with respect to the full length of the step dyeing yarn DY equivalent to one turn of the bundle of bundles YB.
For example, in this embodiment, the total length of one turn of the bundle of bundles YB is 100. The third injection port M3, the seventh injection port M7, and the eleventh injection port M11 have injection widths (width dimensions in the direction in which the cocoon bundles extend) corresponding to 4.86 (%) of the overall length of the cocoon bundle YB. (Hereinafter, the number represented by% is a numerical value based on the total length of one turn of the bundle YB). By doing so, the total length dimension of all point portions becomes 50% or less of the total length of the step dyed yarn DY corresponding to one turn of the bundle of bundles YB. In this way, by suppressing the length dimension of each point part in the bundle YB, a color arrangement pattern of each base part described later can be suitably formed (the length dimension of each color in the same part can be suitably secured).

(Lightness / Saturation)
Furthermore, in the present embodiment, the lightness (degree of color brightness) or saturation (degree of color vividness) of the third color Z is higher than that of the first color X and the second color Y. Therefore, point portions P1 to P6 that are relatively conspicuous as compared with the two folded portions 11 and 12 can be formed in the intermediate portions 14a and 14b.
Here, the lightness (L ^* ) and saturation (C ^* ) of the color are indices based on the L ^* a ^* b ^* color system standardized by the International Lighting Commission, and can be calculated based on, for example, JISZ8729. .
For example, in this embodiment, it is desirable to set the lightness difference (ΔL ^* ) between the third color Z and the other colors (X, Y) in the range of 10-30.

(Base part)
In this embodiment, a plurality of base parts UP1 to UP6 are formed by appropriately injecting the first color X and the second color Y from an injection port different from the point part (see FIG. 4).
Thus, when the eyelid bundle YB is viewed clockwise, the first base part UP1 to the sixth base part UP6 are arranged at appropriate intervals in this order. At this time, the first base part UP1 is disposed on the one side of the eyelid bundle YB while including the first folded portion 11. The first base part UP1 is adjacent to the second base part UP2 and the sixth base part UP6 across the point parts (P1, P6).
Further, the fourth base part UP4 is disposed on the other side of the bag bundle YB while including the second folded portion 12. The fourth base part UP4 is adjacent to the third base part UP3 and the fifth base part UP5 with the point parts (P3, P4) interposed therebetween.

(Base part color scheme)
A specific color arrangement pattern (the arrangement order of the first color X and the second color Y) is formed on each base part.
At this time, it is desirable that the color arrangement pattern of the first base part UP1 is different from the color arrangement pattern of the second base part UP2 and the sixth base part UP6 adjacent thereto.
Therefore, in this embodiment, the first base portion UP1 is divided into the first injection port M1 (first color X: injection width 2.78%) and the second injection port M2 (second color Y: injection width 3.47%). Place below. Therefore, the first base portion UP1 is dyed in a color arrangement pattern in which the second color Y, the first color X, and the second color Y are arranged in this order.
The second base part UP2 and the sixth base part UP6 are composed of a fourth injection port M4 (first color X: injection width 3.47%) and a fifth injection port M5 (second color Y: injection width 4.86%). ) And the sixth injection port M6 (first color X: injection width 3.47%). For this reason, both base parts UP2 and UP6 are dyed in a color arrangement pattern in which the first color X, the second color Y, and the first color X are arranged in this order (the color arrangement pattern is different from that of the first base part UP1).

Similarly, it is desirable that the color arrangement pattern of the fourth base part UP4 is different from the color arrangement pattern of the third base part UP3 and the fifth base part UP5 adjacent thereto.
Therefore, in the present embodiment, the third base part UP3 and the fifth base part UP5 are composed of the eighth injection port M8 (second color Y: injection width 3.47%) and the ninth injection port M9 (first color X: injection). Width 4.17%) and the tenth injection port M10 (second color Y: injection width 3.47%). For this reason, both base parts are dyed by the color arrangement pattern in which the second color Y, the first color X, and the second color Y are arranged in this order.
The fourth base part UP4 is disposed below the twelfth injection port M12 (first color X: injection width 3.47%) and the thirteenth injection port M13 (second color Y: injection width 2.78%). To do. Therefore, the fourth base part UP4 is dyed in a color arrangement pattern in which the first color X, the second color Y, and the first color X are arranged in this order (a color arrangement pattern different from the third base part UP3 and the fifth base part UP5). Becomes).

By the way, since each folding | turning part 11 and 12 becomes linear shape when it is a step dyeing thread | dye DY, the length dimension of the color of the part becomes long (it becomes conspicuous).
Therefore, in this embodiment, the injection widths of the first injection port M1 and the thirteenth injection port M13 are set to 2.78% of the bundle YB, and the injection widths of other injection ports (3.47 of the bundle YB). ~ 4.86%). By doing so, it is possible to prevent the lengths of the colors of the first folded portion 11 and the second folded portion 12 from becoming extremely long (easily noticeable) compared to other portions.

[Use of step dyed yarn]
Then, after the bundle YB is unwound and formed into a plurality of linear dyed yarns DY, it is used for the upper yarn Y1 of each stitch SEW1, SEW2 (see FIG. 2 and FIG. 4B).
In the present embodiment, a plurality of point portions P1 to P6 that are relatively conspicuous are formed in each of the intermediate portions 14a and 14b. In this way, by forming the point parts P1 to P6 (parts that are easily noticeable) at parts different from the folded parts 11 and 12, the stained parts (parts that are partly long and short) of the folded parts 11 and 12 are formed. It can be made inconspicuous as much as possible. Further, since both folded portions 11 and 12 are dyed with different colors, the dyed portion of the same portion can be made less noticeable.
Furthermore, in the present embodiment, the color arrangement pattern of the first base part UP1 (the part having the first folded portion 11) and the color arrangement pattern of the base parts UP2 and UP6 adjacent thereto are different. Similarly, the color arrangement pattern of the fourth base part UP4 (the part having the second folded portion 12) and the color arrangement pattern of the base parts UP3 and UP5 adjacent thereto are different. For this reason, even if the first base part UP1 (fourth base part UP4) is compared with the base part adjacent to the first base part UP1 (fourth base part UP4), it is difficult to discriminate the difference between the two parts (the length of the stained part of both folded parts).
For this reason, according to the present embodiment, the length of partial dyeing (step dyeing wrinkles) of the step dyeing yarn DY can be made as inconspicuous as possible. Therefore, even if the out-stitch DS is formed using the step dyed yarn DY, the length of the partial dyeing is as inconspicuous as possible, so that the sheet structure has a good appearance.

<Modification 1>
In addition to the above, various color schemes can be adopted as the color scheme of the lash bundle YB.
For example, the dyeing machine of the first modification has a plurality of injection ports (first injection port M1 to ninth injection port M9) (see FIG. 5). The first injection port M1 is arranged on the first folding part 11 and the ninth injection port M9 is arranged on the second folding part 12. And the 2nd injection port M2- 8th injection port M8 is arrange | positioned on a pair of intermediate part 14a, 14b in this order.
A plurality of point portions (P1 to P4) are formed at appropriate intervals in each of the intermediate portions 14a and 14b. Furthermore, a plurality of non-base parts (UP1 to UP4) are intermittently provided on the bundle YB with the point parts (P1 to P4) interposed therebetween.
Therefore, purple (third color Z) is injected from the third injection port M3 (injection width 6.25%) and the seventh injection port M7 (injection width 6.25%), so that each point portion (P1 to P4). It was decided to dye.

Further, each base part (UP1 to UP4) is appropriately dyed in a horizontal stripe pattern using violet (first color X) and blue (second color Y) (to form a specific two-color color arrangement pattern).
At this time, in this modification, the first base part UP1 is disposed on the one side of the lash bundle YB while including the first folded portion 11. The first base part UP1 is adjacent to the second base part UP2 and the fourth base part UP4 with the point parts P1 and P4 interposed therebetween.
Therefore, the first base region UP1 is arranged below the first injection port M1 (first color X: injection width 2.78%) and the second injection port M2 (second color Y: injection width 6.25%). Therefore, the first base portion UP1 is dyed in a color arrangement pattern in which the second color Y, the first color X, and the second color Y are arranged in this order.
The second base part UP2 and the fourth base part UP4 are composed of a fourth injection port M4 (first color X: injection width 6.94%) and a fifth injection port M5 (second color Y: injection width 5.56%). ) And the sixth injection port M6 (first color X: injection width 6.25%). For this reason, both base parts UP2 and UP4 are dyed in a color arrangement pattern in which the first color X, the second color Y, and the first color X are arranged in this order (the color arrangement pattern is different from that of the first base part UP1).

Further, the third base part UP3 is disposed on the other side of the eyelid bundle YB while including the second folded portion 12. The third base part UP3 is adjacent to the second base part UP2 and the fourth base part UP4 with the point parts P2 and P4 interposed therebetween.
Therefore, the third base part UP3 is arranged below the eighth injection port M8 (second color Y: injection width 6.25%) and the ninth injection port M9 (first color X: injection width 3.47%). For this reason, the third base part UP3 is dyed in a color arrangement pattern in which the second color Y, the first color X, and the second color Y are arranged in this order (a color scheme different from the second base part UP2 and the fourth base part UP4). Become).

Thus, also in this modification, by forming the point parts P1 to P4 (parts that are easily noticeable) at locations different from the folded parts 11 and 12, the stained parts of the folded parts 11 and 12 are made as inconspicuous as possible. be able to.
Also in this modified example, even if the first base part UP1 (fourth base part UP4) is compared with the base part adjacent to the first base part UP1 (fourth base part UP4), it is difficult to discriminate the difference between the two parts (the length of the stained part of both folded portions).

<Modification 2>
The dyeing machine of Modification 2 has a plurality of injection ports (first injection port M1 to fifth injection port M5) (see FIG. 6). Then, the first injection port M1 is arranged on the first folding unit 11 and the fifth injection port M5 is arranged on the second folding unit 12. And the 2nd injection port M2- 8th injection port M4 is arrange | positioned on a pair of intermediate part 14a, 14b in this order.
A plurality of point portions (P1 to P4) are formed at appropriate intervals in each of the intermediate portions 14a and 14b. Furthermore, a plurality of non-base parts (UP1 to UP4) are intermittently provided on the bundle YB with the point parts (P1 to P4) interposed therebetween.
Therefore, a second injection port M2 (injection width 6.25%) and a fourth injection port M4 (injection width 6.25%) are arranged on each point part (P1 to P4). And each point site | part (P1-P4) was dye | stained by inject | emitting the 2nd color Y whose brightness or saturation is higher than 1st color X (after-mentioned) from each injection port M2, M4.

Next, each base region (UP1 to UP4) is dyed to the first color X at the remaining injection ports.
At this time, in the present modification, the first base portion UP1 (first folding portion 11) is dyed into the first color X at the first injection port M1 (injection width 9.03%). Further, the second base part UP2 and the fourth base part UP4 are dyed into the first color X at the third injection port M3 (injection width 18.75%). Then, the third base region UP3 (second folded portion 12) is dyed into the first color X at the fifth injection port M5 (injection width 9.72%).
Thus, also in this modification, by forming the point parts P1 to P4 (parts that are easily noticeable) at parts different from the folded parts 11 and 12, the stained parts of the folded parts can be made as inconspicuous as possible. .
Furthermore, in the present modification, the lengths of the base parts (UP1 to UP4) are compared with the point parts, while the point parts P1 to P4 are arranged at substantially the same intervals (with a relatively easy-to-see pattern). And set it long. Thus, by setting the length dimension of each base part (UP1 to UP4) to be long, it becomes difficult to distinguish the length of the partial dyed part that occurs in the specific base part (UP1, UP3). The intervals between the point portions may be completely the same, and a slight error (± .0.5% to 2.5%) is allowed because it can be regarded as the same in appearance.

<Modification 3>
The dyeing machine of Modification 3 has a plurality of injection ports (first injection port M1 to seventh injection port M7) (see FIG. 7). The first injection port M1 is arranged on the first folding part 11 and the seventh injection port M7 is arranged on the second folding part 12. Then, the second injection port M2 to the eighth injection port M6 are arranged on the pair of intermediate portions 14a and 14b in this order.
A plurality of point portions (P1 to P6) are formed at appropriate intervals in each of the intermediate portions 14a and 14b. Further, a plurality of non-base parts (UP1 to UP6) are intermittently provided on the bundle YB with the point parts (P1 to P6) interposed therebetween.
Therefore, the second injection port M2 (injection width 4.86%), the fourth injection port M4 (injection width 4.86%), and the sixth injection port M6 (injection width 4) are respectively provided on the point portions (P1 to P6). .86%). And each point site | part (P1-P6) was dye | stained by inject | emitting the 2nd color Y whose brightness or saturation is higher than 1st color X (after-mentioned) from each injection port M2, M4, M6.

Next, each base part (UP1 to UP6) is dyed to the first color X at the remaining injection ports.
At this time, in this modification, the first base part UP1 (first turn-up portion 11) is dyed into the first color X at the first injection port M1 (injection width 6.25%). The second base part UP2 and the sixth base part UP6 are dyed into the first color X at the third injection port M3 (injection width of 11.81%). In addition, the third base part UP3 and the fifth base part UP5 are dyed into the first color X at the fifth injection port M5 (injection width 11.11%). Then, the fourth base part UP4 (second folding part 12) is dyed into the first color X at the seventh injection port M7 (injection width 6.25%).
Thus, also in this modification, by forming the point parts P1 to P6 (parts that are easily noticeable) at parts different from the folded parts 11 and 12, the stained part of both folded parts can be made as inconspicuous as possible. .
Furthermore, in this modification, the lengths of the base parts (UP1 to UP6) are compared with the point parts, while the point parts P1 to P6 are arranged at substantially the same intervals (with a relatively easy-to-see pattern). And set it long. Thus, by setting the length dimension of each base part (UP1 to UP6) to be long, it becomes difficult to distinguish the length of the partial stained part occurring in the specific base part (UP1, UP4).

The method for producing the step dyed yarn of the present embodiment is not limited to the above-described embodiment, and various other embodiments can be taken.
(1) In this embodiment, the step dyed yarn is dyed using two or three colors, but the number and type of colors used are not limited. For example, the step dyed yarn can be dyed using four or more colors. The configuration of the point parts (number of formations, length dimensions, etc.) can be changed as appropriate according to the size of the lashes, and can be formed, for example, at two places or more than eight places. Further, the configuration of the base part can be changed according to the configuration of the point part. The stitch format is not limited to the main sewing.
(2) Moreover, in this embodiment, the vehicle seat was illustrated as an example of the vehicle interior material (member). Examples of the vehicle interior material include various members such as a vehicle seat, a vehicle seat such as an aircraft or a train, a vehicle wall or floor, an instrument panel, and a console.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest YB Bunch Bundles 11 and 12 Folded Parts 14a and 14b Middle Part P1 to P6 Point Part UP1 to UP6 Base Part DM Dyeing Machine M1 to M13 Injection Port

Claims (3)

In a method for producing a step dyed yarn that can be used for a suture line that appears on the surface of a vehicle interior material,
An undyed thread is formed into a ring shape, a first folded portion, a second folded portion different from the first folded portion, and a pair of intermediate portions disposed between the first folded portion and the second folded portion, After forming a bun with
When dyeing a cocoon bundle with a plurality of disperse dyes, the first folded portion and the second folded portion are dyed in the same or different colors, and the first folded portion and the second folded portion are respectively formed on the pair of intermediate portions. Set a point part dyed in a color different from the color of the folded part,
The point portion occupies 10% or more and 50% or less of the total length of the step dyed yarn corresponding to one turn of the bundle, and the color of the point portion is a color arranged in the bundle. A method for producing a step dyed yarn having the highest brightness or saturation. The method for producing a step dyeing yarn according to claim 1, wherein the point portion occupies 10% or more and 29.2% or less with respect to the entire length of the step dyeing yarn corresponding to one turn of the bundle . A plurality of point portions are formed at appropriate intervals in each of the intermediate portions, and a plurality of base portions different from the point portions as viewed in the extending direction of the eyelid bundle are formed on the eyelet bundle. And intermittently across the
When each base part is dyed in a horizontal stripe pattern with a plurality of colors, the base part color arrangement pattern having the first folded part or the second folded part, and the base part adjacent to the point part across the point part The method for producing a step dyed yarn according to claim 1 or 2, wherein the coloration patterns are different .

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