JP3464318B2 - Latent stretchable sewing thread for chemical lace and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latent elastic sewing thread which exhibits elasticity by dissolving and removing one of the composite yarns and a method for producing the same, and particularly to latent elastic elastic threads for chemical lace suitable for chemical lace. And a method for manufacturing the same.

[0002]

2. Description of the Related Art A chemical lace, in which an easily-dissolving base cloth is embroidered with an insoluble sewing thread using an embroidery lace machine, and then the base cloth is dissolved and removed to leave only an embroidery pattern, Since it is possible to make various patterns and has an excellent three-dimensional effect, it has been used as a high-class lace for a long time.

However, since the chemical lace is embroidered, it is impossible to use a stretchable sewing thread which is difficult to form a seam, and therefore it is not possible to obtain a chemical lace having an embroidery pattern which is highly stretchable.

As a method of improving such a defect, for example, in JP-A-54-106673, an elastic yarn having high elasticity such as polyurethane and synthetic rubber is replaced with a water-soluble non-elastic yarn. Inner covering, and outer covering with water-insoluble yarns to temporarily stop the elasticity of elastic yarns with non-stretchable yarns to enable seam formation, and after embroidering, apply water-soluble A method for producing a chemical lace has been proposed in which the non-stretchable yarn of (1) is dissolved and removed to develop the stretchability.

However, the sewing thread used in the above method is
When the sewing thread is manufactured (inner covering), the elastic yarn is unavoidably greatly stretched, and as a result of the inherent stretching strain, when the water-soluble, non-stretchable yarn is dissolved and removed to develop elasticity, It has a drawback that the elongation strain is recovered and the embroidery pattern is largely shrunk (the above-mentioned publication, page 2, column (4), line 4, shrinks 45%).

It is described in the above-mentioned publication that the above-mentioned drawbacks can be solved by adjusting to a larger pattern when designing an embroidery pattern and shrinking it in a similar shape. However, the sewing density of an embroidery pattern is usually uneven. Therefore, the binding force applied to the sewing thread is different, and it is extremely difficult to uniformly shrink the thread.

Therefore, the embroidery pattern obtained by the above method is distorted during contraction or has irregular irregularities on its surface, so that a good quality chemical lace cannot be obtained. It's a reality.

Further, the above sewing thread is a stretchable thread,
Since an extremely expensive elastic thread such as polyurethane or synthetic rubber is used, the sewing thread also becomes extremely expensive, which is not suitable for general-purpose products.

[0009]

Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to obtain a high-quality embroidery pattern without distortion or surface irregularity of the embroidery pattern. Another object of the present invention is to provide an inexpensive latent elastic sewing thread for chemical lace and a method for producing the same.

[0010]

As a result of various studies to achieve the above object, the present inventors have found that instead of elastic threads such as polyurethane and synthetic rubber, which undergo a great elongation during the production of the sewing thread, during the production of the sewing thread. The present invention has been completed based on the idea of using a crimped yarn that undergoes relatively small elongation and is inexpensive.

That is, according to the present invention, (1) a composite of a non-crimped yarn that is easily soluble in water or an alkali and a sparingly soluble crimped yarn that is less soluble than the non-crimped yarn. And a sparingly soluble crimped yarn having a yarn length difference of 10 to 40% with respect to an easily dissolvable non-crimped yarn, and the sparingly soluble crimped yarn. (2) 150, latent stretchable sewing thread for chemical lace , wherein the number of crimps of the thread is 10 to 80 pieces / cm, and the primary yield point stress of the sewing thread is 0.1 to 1.0 g / de. A heat-shrinking treatment is performed after compounding an easily-dissolvable non-crimped yarn having a dry heat shrinkage at 10 ° C. of 10 to 50% and a hardly soluble crimped yarn having a crimp degree of 10 to 50%. A method for producing a latently elastic sewing thread for chemical laces is provided.

The hardly soluble crimped yarn is preferably a false twist crimped yarn, and the easily soluble non-crimped yarn is preferably polyvinyl alcohol fiber or alkali easily soluble polyester fiber. .

The easily-dissolvable non-crimped yarn used in the sewing thread of the present invention is a yarn having substantially no crimp which can be easily decomposed and dissolved by water or an aqueous alkaline solution.

Preferred examples of such yarns include water-soluble polyvinyl alcohol fibers and polyester fibers which are easily decomposed and dissolved in an alkaline aqueous solution.

Examples of such polyesters include polyesters obtained by copolymerizing a third component such as a metal salt of sulfoisophthalic acid, polyesters containing polyether ester added, and the like.
Preferable examples are polyesters containing at least 2% by weight or more of polyether ester consisting of polyoxyalkylene glycol and / or dicarboxylic acid and polyoxyalkylene glycol component.

The water or alkaline aqueous solution is preferably used after being heated to 95 ° C. or higher in order to increase the decomposition and dissolution rate.

On the other hand, the hardly soluble crimped yarn used in the sewing thread of the present invention is a crimped yarn which is more difficult to decompose and dissolve in water or an alkaline aqueous solution than the easily soluble yarn. Yes, common synthetic fibers are usually sparingly soluble.

The crimped yarn is a yarn having a bend (crimp), and includes, for example, false twist crimped yarn, fluid jet crimped yarn, mechanical crimped yarn, conjugate. Gate crimped yarns and the like can be mentioned, and of these, false twist crimped yarns are most preferable.

In the suture of the present invention, the hardly soluble crimped yarn must be combined with the easily soluble non-crimped yarn in a state where the crimps are manifested, and the number of crimps is 10-80
Needs to be within the range of 15 pieces / cm, especially 15
It is preferably in the range of -50 / cm. When the number of crimps is less than 10 pieces / cm, even if the easily-dissolved non-crimped yarn is decomposed and dissolved and removed, the stretchability is low and a good embroidery pattern with high stretchability cannot be obtained. . On the other hand, when the number of crimps exceeds 80 / cm, the crimps are easily damaged due to wear when the sewing machine is hooked, and troubles such as yarn breakage and skipping occur, which cannot be used.

Furthermore, in the sewing thread of the present invention, the sparingly soluble crimped yarn naturally has a longer yarn length than the easily soluble non-crimped yarn, but there is a difference in the yarn length between the two. 10-40%
It is necessary to be within the range of, especially, 15 to 30%
It is desirable to be within the range. If the difference in yarn length is less than 10%, even if the easily-dissolved non-crimped yarn is decomposed and dissolved,
There is little expression of elasticity, and a good embroidery pattern with high elasticity cannot be obtained. On the other hand, when the difference in yarn length exceeds 40%, the crimps are easily damaged due to wear when the sewing machine is hooked, and treble such as yarn breakage or skipping occurs, which cannot be used.

The sewing thread of the present invention is required to have a primary yield point stress of 0.1 g / de to 1.0 g / de, particularly 0.2 g / de to 0.8 g / de. It is preferable. When the stress is less than 0.1 g / de, the tension when the sewing machine is hung cannot be endured, and thread breakage and the like frequently occur, making it unusable. The stress can be increased by increasing the composite ratio of the easily-dissolved non-crimped yarn, but the yarn is a component that is dissolved and removed after sewing, and it is preferable to reduce the amount used as much as possible in terms of cost. , 1.0 g / de at most is sufficient.

Any method can be used for producing the sewing thread of the present invention by combining the hardly soluble crimped yarn and the easily soluble non-crimped yarn, for example, the hardly soluble crimped yarn. It is possible to use a method in which the yarn is over-fed and is compounded with the easily-dissolved non-crimped yarn by interlacing or a method in which both yarns are aligned and compounded by ply twisting, but it is simply compounded. Since it is difficult to cause a yarn length difference of 10% or more, a yarn having a large heat shrinkage rate is used as the easily-dissolved non-crimped yarn, and a high shrinkage non-crimped yarn is obtained by heat shrinking treatment after compounding. Is preferably used.

In this case, as the easily dissolvable non-crimped yarn,
A yarn having a dry heat shrinkage ratio of 10 to 50% at 150 ° C.,
Moreover, as the sparingly soluble crimped yarn, the crimping degree is 10 to 50.
It is preferred to use% yarn. When the crimping degree is less than 10%, the number of crimps of the sparingly soluble crimped yarn in the sewing thread is 10
The number is less than 50 pieces / cm, and even if the easily-dissolved non-crimped yarn is decomposed, dissolved and removed, sufficient stretchability may not be obtained.
When it exceeds%, the number of crimps exceeds 80 / cm, and the crimps are easily damaged due to wear when the sewing machine is hooked, and troubles such as yarn breakage and skipping are likely to occur.

The above-mentioned highly crimpable and easily soluble non-crimped yarn includes
For example, the water-soluble polyvinyl alcohol fiber and polyester fiber which have been highly shrunk by drawing at room temperature are preferably exemplified.

In the production method of the present invention, the heat-shrinking treatment is carried out by using a slit heater or the like after forming a composite of a hardly soluble crimped yarn and a highly shrinkable easily soluble non-crimped yarn.
A method of shrinking by relaxation heat treatment at 0 to 160 ° C can be adopted.

As another method, a method is also adopted in which the above-described yarns are aligned and twisted, and then contracted in a drape dyeing step (90 to 140 ° C.). The amount of shrinkage is not particularly limited, but is preferably 10 to 50%.

[0027]

[Function] Since the crimped yarn is easily stretched, it is difficult to form a seam by itself, and embroidering cannot be performed.
In the sewing thread of the present invention, since the easily soluble non-crimped yarn and the hardly soluble crimped yarn are combined, the extensibility of the crimped yarn is suppressed, and an appropriate primary yield stress is imparted. And easy to sew.

Moreover, in the sewing thread of the present invention, the number of crimps of the hardly soluble crimped yarn and the difference in the yarn length between the easily soluble non-crimped yarn and the hardly soluble crimped yarn are set within a specific range. Since it is selected, by dissolving, dissolving and removing the easily-dissolved non-crimped yarn, sufficient stretchability is exhibited, and a good embroidery pattern rich in stretchability can be obtained.

Further, in the sewing thread of the present invention, instead of the elastic thread such as polyurethane or synthetic rubber which undergoes a large elongation at the time of manufacturing the sewing thread, the elongation received at the time of manufacturing the sewing thread is relatively small,
Moreover, since cheap crimped yarns are used, when the easily-dissolved non-crimped yarns are decomposed, dissolved and removed to give elasticity, the elongation strain recovers and the embroidery pattern shrinks greatly. Therefore, a high-quality embroidery pattern can be obtained at low cost.

Further, in the method for producing a sewing thread according to the present invention, a yarn having a large heat shrinkage rate is used as the easily soluble non-crimped yarn, and after the composite is subjected to the heat shrinkage treatment, the easily soluble non-crimped yarn is used. The yarn length difference between the yarn and the hardly soluble crimped yarn can be increased to 10 to 40%.

[0031]

EXAMPLES The present invention will be described in more detail below with reference to examples. The properties in the examples were measured by the following methods.

(1) Primary yield point stress (g / de) In the strength-elongation curve measured by the JIS-L-1013-7.5.1 method, this is the first convex inflection portion of the curve. The stress at the intersection of the tangent of the curve before the primary yielding part (the rising part) and the tangent of the curve after the primary yielding part is defined as the primary yield point stress value (g / de).

(2) Number of crimps (pieces / cm) A single yarn of the hardly soluble crimped yarn is unwound from the sewing thread and
A load of 002 g / de is applied, the number of crimp peaks per cm is measured under a microscope, and a value of 1/2 thereof is taken as a crimp number (one cycle of crimp bending is taken as one crimp). .

The measurement was carried out on 20 single yarns, and the average value was taken as the number of crimps.

(3) Yarn length difference (%) A 5 cm sample was taken from the sewing thread, and the slightly soluble crimped yarn and the easily soluble non-crimped yarn were separated and taken out.
Each dimension is measured under a load of 1 g / de, and the yarn length difference (I) is calculated by the following formula.

I = [(L ₁ −L ₂ ) / L ₂ ] × 100 (%) where I: yarn length difference (%) L ₁ : length of sparingly soluble crimped yarn L ₂ : easy dissolution The length of the non-crimped yarn is shown.

(4) Dry Heat Shrinkage (%) A 100 cm (L ₀ ) sample was taken from the easily-dissolved non-crimped yarn before composite, and the sample was formed into a ridge shape and dried at 150 ° C. for 10 minutes.
The sample is freely shrunk for a minute, and the length (L ₁ ) after shrinking is measured under a load of 0.1 g / de, and the dry heat shrinkage (S) is calculated by the following formula.

S = [(L ₀ −L ₁ ) / L ₀ ] × 100 (%) where S: dry heat shrinkage rate (%) L ₀ : length before shrinkage treatment (100 cm) L ₁ : after shrinkage treatment Indicates the length of.

(5) Crimping degree (%) A sample which was treated in boiling water for 20 minutes in a free state and then naturally dried was subjected to a load of 0.2 g / de and a load of 50 c.
mark m (L ₁ ) intervals, then 0.002 g / d
Apply the load e and measure the length (L ₂ ) between the above marks,
The crimping degree (K) is calculated by the following formula.

K = [(L ₁ −L ₂ ) / L ₁ ] × 100 (%) where K: crimping degree (%) L ₀ : 0.202 g / de length under load (50 cm) L ₁ : The length under a 0.002 g / de load is shown.

Example 1 (Production of Highly Shrinkable and Soluble Non-crimped Yarn) Commercially available water-soluble polyvinyl alcohol fiber (“Solvlon” manufactured by Nichibi Co., Ltd., 40 de / 12 fil) was subjected to a room temperature elongation treatment of 13%. This was applied to obtain a highly shrinkable and easily soluble non-crimped yarn. The dry heat shrinkage of this yarn at 150 ° C. was 20%.

(Manufacture of sewing thread) As a sparingly soluble crimped thread,
Using a polyethylene terephthalate false twist crimped yarn (crimping degree 28%) of 50 de / 24 fil obtained by a conventional method, the finished yarn and the high-shrinkable and easily-dissolved non-crimped yarn are aligned to 103 m / An interlace nozzle (air pressure 2 kg / cm ² ) provided between a first roller rotating at a peripheral speed of 1 minute and a second roller rotating at a peripheral speed of 100 m / minute.
Through a 1 m slit heater (temperature 150 ° C., effective length 1 m) provided between the second roller and a third roller rotating at a peripheral speed of 80 m / min. Then, it was wound with a winder to obtain a composite thread for sewing thread.

This composite yarn is subjected to 600 T / m undertwisting in the S direction, the 3 obtained undertwisted yarns are aligned and subjected to 500 T / m overtwisting in the Z direction, and then a silicone sewing machine yarn. 3% of the oil solution was applied to obtain the sewing thread of the present invention.

In the obtained sewing thread, the crimp number of the polyethylene terephthalate false twist crimped thread was 25 pieces / cm, the thread length difference of the sewing thread was 19%, and the primary yield point stress was 0.5 g / de.

(Embroidery sewing, dissolution treatment) Using this sewing thread, a base fabric made of water-soluble vinyl alcohol fiber was embroidered with an embroidery lace machine.
When sewing, there were no problems such as thread breakage or skipped stitches, and it was possible to sew smoothly.

Next, the mixture was stirred in warm water at 80 ° C. for 30 minutes to dissolve and remove the polyvinyl alcohol fibers in the base cloth and the sewing thread. As a result, there was almost no distortion, the surface was flat and elegant, and the stretchability was excellent. A high-quality embroidery pattern was obtained.

Comparative Example 1 When polyurethane elastic yarn (50 de / 6 fil) was used in place of the polyethylene terephthalate false twist crimped yarn in Example 1, embroidery sewing could be carried out without any problems. When polyvinyl alcohol fiber in cloth and sewing thread is dissolved and removed,
The embroidery pattern was distorted due to contraction and surface irregularities, resulting in extremely poor appearance and poor quality.

[Examples 2-9, Comparative Examples 2-5] Example 1
In, the dry heat shrinkage at 150 ° C was changed by changing the room temperature elongation of the polyvinyl alcohol fiber,
Further, the crimping degree of the polyethylene terephthalate false twist crimped yarn is changed by changing the false twisting condition, and the number of crimps of the polyethylene terephthalate false twisted crimped yarn in the sewing thread and the polyvinyl alcohol fiber and polyethylene terephthalate false twist The difference in yarn length from the crimped yarn was changed as shown in Table 1. The peripheral speed of the third roller was appropriately adjusted so as to obtain a predetermined yarn length difference.

The results are shown in Table 1 and the number of crimps is 1
When the yarn length difference is in the range of 0 to 80 yarns / cm and the yarn length difference is in the range of 10 to 40% (Examples 2 to 9), both the embroidery pattern appearance and the sewability are good, and the number of crimps is 15 to 50 yarns / cm. cm, when the yarn length difference is within the range of 15 to 30% (Examples 3, 4, 7,
In 8), particularly good results were obtained.

On the other hand, in the case where the number of crimps is less than 10 pieces / cm (Comparative Example 2), even if the polyvinyl alcohol fiber is dissolved and removed, the stretchability is small and the stretchability is good. When the embroidery pattern cannot be obtained and the number of crimps exceeds 80 / cm (Comparative Example 3), the crimps are easily damaged due to abrasion when the sewing machine is hooked, and troubles such as yarn breakage and stitch skipping occur. did. When the difference in yarn length is less than 10% (Comparative Example 4)
When the polyvinyl alcohol fiber is dissolved and removed, the stretchability is small, a good embroidery pattern having a high stretchability cannot be obtained, and the yarn length difference exceeds 40% (Comparative Example 5).
The crimps were easily damaged due to wear when the sewing machine was hooked, and treble such as yarn breakage and skipping occurred.

[0051]

[Table 1]

In Table 1, the embroidery appearance and sewability were evaluated according to the following criteria.

(1) Appearance of embroidery The obtained embroidery was observed, and when a high-quality embroidery pattern having extremely high elasticity and no distortion or surface unevenness was obtained, the elasticity was good. The case where an embroidery pattern was obtained was marked with ◯, and the case where an embroidery pattern with high elasticity was not obtained was marked with x.

(2) Sewing property A case where thread breakage, skipping, etc. does not occur during embroidery sewing, and it is possible to sew extremely smoothly. Was marked with ◯, thread breakage, skipped stitches, etc. occurred frequently, and embroidering was not possible.

[Example 10 and Comparative Example 6] In Example 1, by changing the composite ratio of the polyvinyl alcohol fiber and the polyethylene terephthalate false twist crimped yarn,
The primary yield point stress of the sewing thread was changed as shown in Table 2.

The results are shown in Table 2. When the primary yield point stress is 0.1 g / de or more (Example 10), the embroidery pattern appearance and the sewability are good, but the stress is 0.
When it was less than 1 g / de (Comparative Example 6), the tension at the time of hooking the sewing machine could not be endured, and thread breakage and the like frequently occurred, so that it could not be used.

[0057]

[Table 2]

The embroidery appearance and sewability were evaluated according to the same criteria as in Table 1.

Example 11 (Production of Highly Shrinkable and Soluble Non-Crimped Yarn) 4% by weight of polyoxyalkylene glycol and 4% by weight of polyether ester composed of dicarboxylic acid and polyoxyalkylene glycol component were prepared. The contained polyethylene terephthalate is melted at 290 ° C., discharged from a spinneret having a Y-shaped discharge hole, and drawn at a spinning speed of 1500 m / min.
Then, it is stretched 2.0 times to have a triangular cross-section and 4
A highly shrinkable, easily soluble, non-crimped yarn of 0 de / 12 fil was obtained. The dry heat shrinkage of this yarn at 150 ° C. was 25%.

(Manufacture of sewing thread) As a sparingly soluble crimped thread,
Using a polyethylene terephthalate false twist crimped yarn (crimping degree 28%) of 50 de / 24 fil obtained by a conventional method, the finished yarn and the high-shrinkable and easily-dissolved non-crimped yarn are aligned to 103 m / An interlace nozzle (air pressure 2 kg / cm ² ) provided between a first roller rotating at a peripheral speed of 1 minute and a second roller rotating at a peripheral speed of 100 m / minute.
Through a slit heater of 1 m (temperature 150 ° C., effective length 1 m) provided between the second roller and a third roller rotating at a peripheral speed of 75 m / min. Then, it was wound with a winder to obtain a composite thread for sewing thread.

This composite yarn is subjected to 600 T / m undertwisting in the S direction, three obtained undertwisted yarns are aligned and subjected to 500 T / m overtwisting in the Z direction, and then a silicone sewing machine yarn. 3% of the oil solution was applied to obtain the sewing thread of the present invention.

In the obtained sewing thread, the number of crimped polyethylene terephthalate false twist crimped threads was 30 pieces / cm, the thread length difference of the sewing thread was 24%, and the primary yield point stress was 0.6 g / de.

(Embroidery sewing, dissolution treatment) Using this sewing thread, the same base cloth as in Example 1 was embroidered using an embroidery lace machine. When sewing, thread breakage,
No trouble such as skipped stitches occurred at all, and it was possible to sew smoothly.

Then, a 90 ° C. NaOH aqueous solution (concentration: 3
(5 g / liter) for 30 minutes with stirring to decompose and remove the copolyester fiber in the base cloth and the sewing thread. As a result, there is almost no distortion, the surface is flat and graceful, and the embroidery of high quality is rich in elasticity. The handle was obtained.

[Examples 12 to 19 and Comparative Examples 7 to 10] In Example 11, the content ratios of the polyoxyalkylene glycol and the polyether ester contained in the highly shrinkable and easily soluble non-crimped yarn were changed. By changing the dry heat shrinkage rate at 150 ° C., and further changing the false twisting conditions to change the crimping degree of the polyester false twisting crimped yarn, so that the polyethylene terephthalate false twisting crimped yarn in the sewing thread is crimped. The number of reductions and the yarn length difference between the copolymerized polyethylene terephthalate fiber and the polyethylene terephthalate false twist crimped yarn were changed as shown in Table 3. The peripheral speed of the third roller was appropriately adjusted so as to obtain a predetermined yarn length difference.

The results are shown in Table 3 and the number of crimps is 1
When the yarn length difference is in the range of 0 to 80 yarns / cm and the yarn length difference is in the range of 10 to 40% (Examples 12 to 19), both the embroidery pattern appearance and the sewability are good, and the number of crimps is 15 to 50 yarns / cm. cm, when the yarn length difference is within the range of 15 to 30% (Examples 13 and 1)
4, 17, 18) gave particularly good results.

On the other hand, when the number of crimps is less than 10 / cm (Comparative Example 7), even if the copolymerized polyethylene terephthalate fiber is decomposed and removed, the stretchability is small and the stretchability is high. No good embroidery pattern, 8 crimps
When the number exceeds 0 / cm (Comparative Example 8), the crimp is easily damaged due to wear when the sewing machine is hooked, and troubles such as yarn breakage and skipping occur. Further, when the difference in yarn length is less than 10% (Comparative Example 9), even if the copolymerized polyethylene terephthalate fiber is decomposed and removed, the stretchability is small and a good embroidery pattern with high stretchability cannot be obtained. When the difference in yarn length exceeds 40% (Comparative Example 10), the crimps are easily damaged due to wear and the like when the sewing machine is hooked, and treble such as yarn breakage and skipping occurs.

[0068]

[Table 3]

The embroidery appearance and sewability were evaluated according to the same criteria as in Table 1.

[Example 20, Comparative Example 11] In Example 11, the primary yield stress of the sewing thread is shown in Table 4 by changing the composite ratio of the copolymerized polyethylene terephthalate fiber and the polyethylene terephthalate false twist crimped thread. Was changed.

The results are shown in Table 4. When the primary yield point stress is 0.1 g / de or more (Example 20), the embroidery pattern appearance and the sewability are good, but the stress is 0.
In the case of less than 1 g / de (Comparative Example 11), the tension at the time of hooking the sewing machine could not be endured, and thread breakage and the like frequently occurred, and it could not be used.

[0072]

[Table 4]

The embroidery appearance and sewability were evaluated according to the same criteria as in Table 1.

[0074]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a high-quality embroidery pattern that is highly stretchable without distortion or surface irregularities of the embroidery pattern, and does not cause yarn breakage or skipping. A potentially elastic sewing thread for chemical lace , which has good sewability and is inexpensive, can be obtained.

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A 63-211333 (JP, A) JP-A 7-173737 (JP, A) JP-A 1-239133 (JP, A) JP-A 56- 9439 (JP, A) JP 51-139949 (JP, A) JP 1-260030 (JP, A) JP 2-26945 (JP, A) Actual development 58-12286 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) D02G 1/00-3/48 D02J 1/00-13/00

Claims (8)

(57) [Claims] 1. A sewing thread comprising a composite of a non-crimped yarn that is easily soluble in water or an alkali and a sparingly soluble crimped yarn that is less soluble than the non-crimped yarn. The slightly soluble crimped yarn has a yarn length difference of 10 to 40% with respect to the easily soluble non-crimped yarn, and the number of crimps of the hardly soluble crimped yarn is 10
-80 pieces / cm, the primary yield point stress of the sewing thread is 0.1
Chemical race characterized by being 1.0 g / de
Use potential stretch sewing thread. 2. The latent elastic sewing thread for chemical lace according to claim 1, wherein the hardly soluble crimped thread is a false twist crimped thread. 3. The latently elastic sewing thread for chemical laces according to claim 1 or 2, wherein the easily-dissolved non-crimped yarn is polyvinyl alcohol fiber. 4. The chemical according to claim 1, wherein the easily-dissolved non-crimped yarn is an alkali-dissolvable polyester fiber.
Latent elastic sewing thread for lace . 5. A dry heat shrinkage ratio at 150 ° C. of 10 to 5
Latent expansion and contraction for chemical lace, which is characterized in that after 0% of a readily-dissolved non-crimped yarn and a sparingly-soluble crimped yarn having a crimping degree of 10 to 50%, are subjected to heat shrinkage treatment. For manufacturing a sex sewing thread. 6. The method for producing a latent elastic sewing thread for chemical lace according to claim 5, wherein the hardly soluble crimped thread is a false twist crimped thread. 7. The method for producing a latent elastic sewing thread for chemical lace according to claim 5, wherein the easily-dissolved non-crimped yarn is polyvinyl alcohol fiber. 8. The chemical according to claim 5, wherein the easily-dissolved non-crimped yarn is an alkali-dissolvable polyester fiber.
A method for manufacturing a latent elastic sewing thread for lace .