KR101922716B1 - Silk textile with pleats and elasticity and its preparation method - Google Patents

Abstract

The present invention relates to a method for producing a silk fabric excellent in wrinkle pattern and elasticity, and more particularly, to a method for producing a silk fabric excellent in wrinkle pattern and elasticity, comprising the steps of weaving alternately a silk yarn having a relatively high twist number and a silk yarn having a relatively low twist number, The present invention relates to a method of producing a silk fabric by using a silk fabric and a silk fabric excellent in elasticity while having a wrinkle pattern produced therefrom.

Description

Technical Field [0001] The present invention relates to a silk fabric having elasticity of a wrinkled pattern and a method of manufacturing the same.

The present invention relates to a wrinkled silk fabric and a method of manufacturing the same. More particularly, the present invention relates to a method of manufacturing a silk fabric having elasticity while a wrinkle pattern is developed by designing the silk fabric as a portion having different elasticity.

Silk has been widely used as the best garment material for thousands of years based on its excellent gloss, feel, strength and wig. Silk is a composite material composed of two proteins, fibroin and sericin. Sericin on the silk surface has excellent skin affinity, excellent hygroscopicity and biocompatibility, and silk can be widely used as a biomaterial including medical material It is a highly utilized material.

In today's society, clothing materials that can wear comfort but have wrinkle patterns are able to express glamor. However, in the case of silk fabrics, clothing materials are released in a simple and simple style such as hanbok rather than wrinkle pattern, There is also a problem with the elasticity of the silk fabrics, and it is a problem in the silk industry that the fields where the silk fabrics are used are somewhat limited as in the traditional Hanbok.

Therefore, it is necessary to develop a new type of functional silk material with new performance, unlike the field of clothing use material where conventional silk material was used. Especially, it is necessary to develop new novel materials such as silk fabrics which are easy to wear while having a splendid appearance using wrinkle patterns.

The present invention provides a silk fabric excellent in the elasticity of wrinkle patterns and a method of manufacturing the same.

According to an embodiment of the present invention, there is provided a knitted fabric comprising a first upper yarn woven silk yarn having a twist number of 600 TPM or more, and a second upper yarn woven silk yarn having a twist number of 5000 TPM or lower,

Wherein the twist of the weft yarn in the first upper yarn is greater than the twist number of the weft yarn in the second upper yarn part by at least 500 TPM, and the second upper yarn end and the second upper yarn end, Is provided with a crease portion.

For example, the oblique direction length of the first oblique portion may be 1 cm or more, and the oblique direction length of the second oblique portion may be 1 cm or more.

In addition, the weft fineness of the first weft yarn part and the second weft yarn part may be 10 denier or more, respectively, and the inclination of the first weft yarn part and the second weft yarn part may be silk yarn having a fineness of 10 denier or more.

For example, the number of wrinkles per unit length in the weft direction may be 1 / cm or more.

The silk fabric may have an elongation in the weft direction of 20% or more and an elastic recovery rate in the weft direction of 70% or more.

On the other hand, according to another embodiment of the invention, there is provided a method for producing a silk fabric having elasticity of a wrinkle pattern as described above. The silk fabric is produced by repeatedly arranging a first top yarn using silk yarn having a twist number of 600 TPM or more and a second top yarn using silk yarn having a twist number of 5000 TPM or less as weft yarns to weave the silk fabric step; Wet processing the woven silk fabric with a solvent; And a drying step of removing the solvent from the wet treated silk fabric. Here, the twist number of the weft yarn of the first weft yarn part is larger than the twist number of the second weft yarn part with the weft yarn, the difference in the twist number between the two is 500 TPM or more, and the wrinkle part is formed on the second weft yarn part.

For example, the weaving density of the first upper and lower second yarns may be 5 yarns / inch or more, respectively.

The wet treatment may be performed at 0.1 ° C or higher for 0.1 second or longer, and the drying may be performed at 5 ° C or higher for 0.5 hour or longer.

According to the present invention, the silk fabric is woven by alternately using the weft yarns having different twist numbers, and after the drying process of refining and drying the woven silk fabric, a wrinkled pattern is produced, Can be obtained.

1 is a schematic view of a silk fabric woven alternately in an oblique direction using a silk yarn having a small twist number and a silk yarn having a large twist number according to an embodiment of the present invention.
FIG. 2 is a schematic view illustrating an example of measuring the number of wrinkles per unit length for the wrinkles formed on the second upper base portion in the silk fabric according to an embodiment of the present invention.
3 is a photograph of the silk fabric produced according to Example 1, viewed from above.
4 is a side view of the silk fabric produced according to Example 1. Fig.
Fig. 5 is a photograph showing a preparation shape of a silk fabric sample and a sample loaded for measurement when measuring mechanical properties. Fig.

In the present invention, the terms first, second, etc. are used to describe various components, and the terms are used only for the purpose of distinguishing one component from another.

Moreover, the terminology used herein is for the purpose of describing exemplary embodiments only and is not intended to be limiting of the present invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises," " comprising, "" comprising, "or" having ", mean that there exist features, numbers, steps, components (or components) It is to be understood that the specification does not preclude the presence or addition of one or more other features, numbers, steps, components (or components), or combinations thereof.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, a silk fabric having good elasticity and a wrinkle pattern according to a preferred embodiment of the present invention and a method for manufacturing the same will be described in detail. It is to be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

The inventors of the present invention have conducted research to produce a silk fabric having excellent elasticity while having a wrinkle pattern, weaving it with a silk yarn having a small number of twists in a certain interval, The present invention has been accomplished on the basis of the fact that it is possible to produce a silk fabric excellent in elasticity even when there is a wrinkle pattern when the silk fabric is woven, refined and dried.

According to one embodiment of the invention, there is provided a silk fabric excellent in elasticity while having a wrinkled pattern. Wherein the silk fabric includes a first top yarn weaving a silk yarn having a twist number of 600 TPM or more and a second top yarn weaving a silk yarn having a twist number of 5000 TPM or less,

Wherein the twist of the weft yarn in the first upper yarn is greater than the twist number of the weft yarn in the second upper yarn part by at least 500 TPM, and the second upper yarn end and the second upper yarn end, As shown in Fig.

The silk yarn used in the warp and weft yarns of the present invention may be a yarn obtained by folding a plurality of silk filaments that have not been refined by a material obtained from the cocoon cocoons, The filaments may be located in the form of core yarns surrounded by silk filaments. Particularly, in the present invention, when only 100% silk yarns are used for all warp yarns without incorporation of a separate spandex or synthetic fiber, such 100% silk fabrics preserve the inherent excellent properties of silk Can have a great advantage.

As shown in Fig. 1, the silk fabric of the present invention is produced by weaving the first upper fascia at a certain interval with silk yarn having a relatively high twist number as a weave, The second upper leg portion is woven and arranged alternately one or more times repeatedly to have a wrinkled pattern and excellent elasticity.

In particular, the first top of the silk fabric is woven of silk yarns having a twist number of at least 600 TPM or 600 to 10,000 TPM, preferably silk yarns having a twist number of at least 1,000 TPM or 1,000 to 6,000 TPM, Can be used. In order to form wrinkles in the second upper yarn portion with higher shrinkage than the second upper yarn portion in the solvent treatment in the wet process immediately after the first upper yarn portion in the process described later, the first upper yarn portion is formed of silk yarn having a twist number of 600 TPM or more It should be used as a weft. However, the number of twists of the weft yarn in the first upper yarn can be reduced to 10,000 TPM or less in order to prevent yarn breakage in actual yarn processing or improve weaving efficiency.

Also, in the above-mentioned silk fabric, the second upper yarn is woven silk yarn having a twist number of 5,000 TPM or less or 100 to 5,000 TPM, preferably a silk yarn having a twist number of 2,000 TPM or less or 100 to 2,000 TPM It can be made up. The second upper yarn portion should be used as a weft yarn having a relatively lower shrinkage than the first upper yarn portion and a wrinkle on the second upper yarn portion in the treatment of the solvent immediately after the second upper yarn portion is 5,000 TPM or less. However, the twist number of the weft yarn in the second weft yarn is 100 yarns or more in terms of maintaining the minimum strength in order to be applied to the weaving process of weaving yarns.

In order to form the wrinkle portion in the second upper yarn portion in the silk fabric of the present invention, the weft twist number of the second upper yarn portion is smaller than the twist number of the first upper yarn portion. The difference in twist number of the weft yarns of the first weft yarn and the second weft yarn may be not less than 500 TPM or not less than 10,000 TPM and twist per meter (TPM) May be greater than or equal to 1000 TPM, or greater than or equal to 1000 TPM and less than or equal to 8,000 TPM, and more preferably greater than or equal to 2,000 TPM or greater than or equal to 2,000 TPM and less than or equal to 6,000 TPM. If the difference in the twist number of the weft silk yarn is less than 500 TPM, there is little difference in the degree of tangling as the twist of the silk is loosened, so that the wrinkle pattern may not occur on the second upper yarn end. However, the difference in twist number of weft yarns applied to the first upper yarn and the second upper yarn may be less than 10,000 TPM in terms of improving the weaving efficiency by applying the silk fabric to clothes for the present invention.

As an example, the length in the oblique direction of the portion where the number of kinks is different may be 1 cm or more, or 1 cm to 1 m, more preferably 3 cm or more, or 3 cm or more to 75 cm or less, Or 5 cm or more and 50 cm or less. In the silk fabric of the present invention, the weft lengths in the oblique direction of the first upper warp and the second weft yarn may be the same or different from each other. Here, when the lengths of the first and second upper ends in the oblique direction are less than 1 cm, the length of the oblique direction may be too short, so that the appearance of the wrinkle pattern may be difficult. However, if the oblique direction lengths of the first upper and lower second warp yarns are each more than 1 m, it may not be effective to develop wrinkles in the human garment.

In the silk fabric of the present invention, the warp yarn used together with the weft yarn may be any known silk yarn without any particular limitation. Silk yarns that are the same as or different from the weft yarns used in the first upper yarn end and the second upper yarn end can be applied. As an example, the warp in the silk fabric of the present invention can be a silk yarn with a fineness of 10 deniers or more. Also, the warp can be a silk yarn having a twist number of 100 TPM to 10,000 TPM, preferably 150 TPM to 2,000 TPM, more preferably 200 TPM to 1,000 TPM.

The silk yarns used as weft yarns and warp yarns in the silk fabric of the present invention may have a fineness of 10 denier or more or 10 denier or more and 100 denier or less. The fineness of such a silk yarn can be preferably 15 denier or more or 15 denier or more to 75 denier or less, more preferably 20 denier or more, or 20 denier or more to 60 denier or less. If the fineness of the silk yarn which can be used as the warp and weft of the silk fabric is less than 10 denier, it may be practically difficult to manufacture and weave the yarn in a state of using silk. Further, when the fineness of the silk yarn exceeds 100 denier, the fineness is too large in the application of clothes and biomaterials, so that it is difficult to actually weave the fabric and it may be difficult to use as actual fabric. In this respect, the fineness of the warp yarns and the warp yarns in the first warp yarns and the second warp yarns may be 10 denier or more, or 10 denier or more and 100 denier or less, respectively.

On the other hand, in the silk fabric of the present invention, since the shrinkage occurs at the portion woven by the weft twist number of the second upper yarn portion, wrinkles are generated. The number of wrinkles per unit length in the weft direction may be 1 / cm or more, or 1 / cm to 10 / cm, and preferably 1.5 / cm or more. Here, the number of wrinkles indicates the number of bends in which the woven fabric is curved up and down per unit length, and the number of wrinkles in the wrinkled portion protruding upward in the weft straight line length (cm) Next, the number of bends can be calculated by dividing by the unit length (cm). The number of wrinkles per unit length in the weft direction in the second upper warp yarn may be 1 / cm or more in view of visibility for the silk fabric to exhibit sufficient wrinkle patterns. In particular, in the silk fabric of the present invention, the larger the number of wrinkles per unit length, the greater the difference in the number of kinks between the higher kinker and the lower kinker. That is, the wrinkles are caused by the difference in the shrinkage percentage, and the shrinkage is affected by the twisting number of the weft. Also, as the length of the first weft yarn decreases, the wrinkles may appear to decrease somewhat, and if the weaving length decreases to less than about 1 cm, for example, to about 0.2 cm, It may be difficult to form wrinkles.

Further, the silk fabric may have an elongation in the weft direction of 20% or more and an elastic recovery rate in the weft direction of 70% or more. In particular, the highly stretchable silk fabric of the present invention was stored for 24 hours or more under standard conditions of a temperature of 20 ° C and a relative humidity of 65% for a sample having a length of 25 cm and a width of 3 cm, and then gauge length 20 (load cell: 200 kgf) at a tensile rate of 10 cm / min while measuring elongation at 20% or more, or 20% or more and 500% or more, preferably 35% or more, Can be at least 40% or at least 50%. In addition, the highly stretchable silk fabric may have an elastic recovery rate of 70% or more, preferably 80% or more, more preferably 90% or more or 97% or more, and the elastic recovery rate may be measured by the method described in Test Examples . ≪ / RTI > Particularly, the elastic recovery rate in the weft direction of the silk fabric can secure a superior elastic recovery rate as the warp twist of the first upper yarn portion increases.

In addition, the silk fabric may have a shrinkage ratio of 40% or more, preferably 55% or more, or 57% or more, which indicates the degree of shrinkage in the weft direction. The shrinkage ratio can be measured according to the method described in Test Examples to be described later. The shrinkage ratio in the weft direction of the silk fabric is not significantly affected by the weaving length of the first upper weft yarn and the twist number of the second upper weft yarn, and the weft direction shrinkage ratio is determined by the twist number of the first weft yarn . This is because the wrinkle is formed as the first weft yarn is contracted in the second weft yarn portion and the length in the weft direction is decreased together with the weft yarn contraction ratio of the entire silk fabric is determined according to how much the first weft yarn portion is contracted, The higher the twist number of the warp yarns, the greater the shrinkage rate. For example, a similar level of shrinkage can be exhibited for a silk fabric woven using the same twist count.

The silk fabric of the present invention can be used not only for clothes such as outdoor active wear and party suits which require a colorful wrinkle pattern and excellent elasticity but also for a medical use such as an image treatment material, a wound dressing material, a dental shielding film, Can be used for cosmetic purposes.

In addition to the silk yarn as described above, the silk fabric may further include an additive, a processing agent, and the like that are conventionally employed in the art to which the present invention pertains.

On the other hand, according to another embodiment of the invention, there is provided a method for producing a silk fabric having elasticity of a wrinkle pattern as described above. The method of manufacturing the silk fabric includes: weaving the silk fabric using alternating weft yarns with different twists; Wetting the woven silk fabric; And drying it.

In particular, the method for producing the silk fabric is characterized in that the first top yarn using a silk yarn having a twist number of 600 TPM or more and the second top yarn using a silk yarn having a twist number of 5000 TPM or less are repeatedly disposed, Weaving; Wet processing the woven silk fabric with a solvent; And a drying step of removing the solvent from the wet treated silk fabric. Here, the twist number of the weft yarn is greater than the twist number of the weft yarn in the first upper yarn part by at least 500 TPM, and the wrinkle part is formed in the second upper yarn part.

In the present invention, the silk yarn used in the weaving step may be a yarn obtained by folding a plurality of silk filaments which are not refined by a material obtained from the silkworm cocoon, a polyurethane filament is located in the core part, The silk filaments may be in the form of a core yarn encapsulated.

The number of twists and weights of warp yarns and warp yarns in the weaving step, the difference in the number of twists between the weft yarns of the first warp yarn and the second warp yarn, and the warp direction lengths of the first warp yarn and the second warp yarn are as described above.

On the other hand, the weft density of the first weft portion and the second weft portion may both be 5 yarns / inch or 5 yarns / inch to 500 yarns / inch, preferably 10 yarns / inch or more. Here, when the weaving density of the silk fabric is less than 5 yarns / inch, it is very difficult to weave because the weaving density is too low, and it is difficult to use it as a garment fabric even after weaving. When the weaving density exceeds 500 yarns / inch, It is impossible to woven silk yarn having a high fineness because the weaving density is too high, and a problem that wrinkles are hardly formed in the second upper yarn portion occurs.

In the present invention, the principle of manufacturing a silk fabric excellent in the elasticity of the wrinkle pattern is that after the silk yarn having a low twist is weighed and sewed for a predetermined length, the first upper yarn portion is woven with silk yarn having a high twist And after that, the lower silk yarn is woven for a predetermined length, and thereafter, the lower silk yarn is woven for a predetermined length such that the lower silk yarn is woven for a predetermined length, and then the other silk yarn is repeatedly woven at regular intervals (Fig. 1) (First upper yarn) woven with a high twist number is shrunk to a large extent, and a portion (second upper yarn) woven with a silk yarn having a relatively low twist number is shrunk to a small extent, and a wrinkled pattern is formed due to a difference in shrinkage (Fig. 3). In addition, since the portion (the first uppermost yarn) woven with a high-twist silk yarn has a high elasticity after largely shrinking, the thus-produced silk fabric has a certain level of elasticity.

As described above, a silk yarn having a high twist number and a silk yarn having a small twist number are alternately used to weave a silk fabric. Such a weaving process can be carried out by applying various forms such as plain weave, twill weave, and main weave without particular limitation.

The woven silk fabric may be subjected to a wet treatment step such as scouring and a drying step to impart a wrinkle pattern with excellent elasticity.

In particular, the wet treatment may be performed at 0.1 ° C or higher for 0.1 second or more, and the drying may be performed at 5 ° C or higher for 0.5 hour or more.

One embodiment of the wet treatment step in the present invention is a refining process. This "refining step" is a well known process for removing sericin from silk, and it is possible to use any process for removing sericin from silk at present. The scouring agent may be any scouring agent commonly used to remove sericin from silk. For example, it can be carried out using a polishing agent comprising at least one selected from the group consisting of an aqueous solution of soap, an aqueous alkali solution, an aqueous acid solution, an aqueous enzyme solution and an aqueous amine solution. Herein, the soap may be selected from the group consisting of Tallow Oliver oil, Coconut oil, Caster oil, Arachis oil, Cotton seed oil, Sodium laurate, sodium laurate, sodium myristate, sodium stearate, sodium arachidate, sodium oleate, sodium ricinoleate, And sodium ricinoleate. It is also possible to refine it in an alkali aqueous solution or an acidic aqueous solution, and also to apply a refining method using an enzyme. The alkali aqueous solution may be sodium hydroxide, sodium carbonate, calcium carbonate, sodium silicate, sodium phosphate, sodium bicarbonate, borax, ammonia or the like. The acidic aqueous solution may be lactic acid, tartaric acid, citric acid, oxalic acid, malonic acid, succinic acid, acetic acid, chloroacetic acid, dichloroacetic acid trichloroacetic acid or the like. Trypsin, Papain and the like may be used as the enzyme. In addition, refining using methylamine, ethylamine or the like is also applicable as an amine compound.

(Bath ratio, w / v, g / mL), i.e., silk weight (g): refining bath volume (mL) to a degumming bath containing the refining agent is 1: 5 or more 1: 5 to 1: 100. If the bath ratio of the silk is less than 1: 5 w / v (g / mL), the cleansing liquid may not be sufficiently immersed in the silk, so sericin removal may not be effectively performed. In addition, the bath ratio of the silk to the refining bath may preferably be 1:10 w / v (g / mL) or more. However, the bath ratio of the silk to the degumming bath is preferably 1: 100 w / v (g / mL) or less, preferably 1:50 w / v (g / mL).

The refining process may be performed at 70 to 120 ° C, preferably 100 to 110 ° C. The refining time may be 0.1 to 3 hours, preferably 0.5 to 2 hours. When the temperature of the refining step is less than 70 캜, refining does not sufficiently take place or the refining time is greatly increased, which may increase the processing cost. If the temperature of the refining step exceeds 120 ° C, the molecular chain of the silk may be cut off during the refining process, or the silk may be injured.

In the present invention, the wet processing step may be performed by various processes such as supplying moisture to the silk fabric in addition to the refining process. The wet process may be performed by immersing the woven fabric in water, spraying, or the like.

In addition, the present invention performs the drying process after performing the above-described refining process. In this drying process, the specific drying method, temperature, time and the like can be applied without any limitation so long as the moisture in the silk fabric can be effectively removed. For example, the drying temperature may be 5 ° C or higher or 5 ° C to 250 ° C, preferably 15 ° C or higher, or 15 ° C to 200 ° C, more preferably 25 ° C or higher, or 25 ° C to 150 ° C. In the process, the drying time may be more than 0.5 hour or 0.5 hour to 100 hours, preferably 1 hour or more, more preferably 1.5 hours or more. If the drying step is carried out at less than 5 ° C, the drying temperature is too low to significantly reduce the efficiency of removing moisture from the silk fabric. However, when the drying step is carried out at a temperature of 250 ° C or higher, the silk fabric may be damaged by heat, which is not preferable. The drying time may be 0.5 hours or more in terms of effectively removing the solvent from the silk fabric, and the drying time may be adjusted according to the drying temperature. However, it can be carried out for 100 hours or less in terms of preventing the fabric from being damaged by a long drying process.

The method of manufacturing the silk fabric may further include a step that is conventionally employed in the art to which the present invention belongs, in addition to the steps described above.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

Example  One

As shown in FIG. 1, the first upper yarn using a relatively high twist yarn and the second upper yarn using a relatively low twisting yarn were alternately woven to produce a silk fabric. A more specific process for producing silk fabrics is as follows.

First, silk yarn yarns of 42 denier were used for warp yarns and silk yarn yarns of 21 denier yarns were knitted with high yarn counts under the conditions shown in the following Table 1, RTI ID = 0.0 > 10 cm. ≪ / RTI > That is, in FIG. 3, weaving was performed so that the weaving length of the high twist number (first top yarn) weft is 10 cm. Thereafter, the warp yarns were again dipped in a 42-denier silk yarn yarn, and the yarn yarns were twisted at a second twist of the silk fabric so as to have an oblique direction length of 10 cm, He made his father. That is, in FIG. 3, the weft was woven so that the weft length of the low twist number (second upper shoulder) weft was 10 cm. Here, the warp density was 60 yarns / inch and the weft density was 74 yarns / inch, and the silk fabric was woven in plain weave using a weaving machine (Hokuriku, Yamamoto, Japan).

The silk fabric was refined and dried to produce the final silk fabric. Silk refining was performed at a boiling temperature of 0.024% (w / v) sodium oleate aqueous solution and 0.016% sodium carbonate aqueous solution, And the refining process was performed for 2 hours. Drying was carried out using a hot air drying oven. At this time, the drying temperature was set at 80 DEG C based on the hot air temperature of the dryer and the drying time was 24 hours.

FIG. 3 shows a photograph of the silk fabric thus manufactured, and FIG. 4 shows a photograph of the fabric seen from the side.

Example  2 to 4

In the same manner as in Example 1, weaving, refining, and weaving were performed in the same manner as in Example 1, except that the types of weft yarns to be applied to the first upper yarn portion and the second upper yarn portion were different from the weaving lengths in the oblique direction, The drying process was applied to produce silk fabrics.

Example  5

A silk / polyurethane core made by wrapping a core yarn with four 21-denier silk filaments using polyurethane as a core yarn as a weft yarn to be applied to the first upper yarn portion and the second upper yarn portion under the conditions shown in the following Table 1 A silk fabric was produced by applying a weaving, refining and drying process in the same manner as in Example 1, except that the silk fabric was used.

Comparative Example  1 to 3

In the same manner as in Example 1, weaving, refining, and weaving were performed in the same manner as in Example 1, except that the types of weft yarns to be applied to the first upper yarn portion and the second upper yarn portion were different from the weaving lengths in the oblique direction, The drying process was applied to produce silk fabrics.

The types of weft yarns and weft lengths in the warp direction applied to the first and second top yarns of the silk fabrics produced according to Examples 1 to 5 and Comparative Examples 1 to 3 are as shown in Table 1 below.

Composition of weft 1st place
Weft
Number of twists
(TPM) 1st place
Weft
Weaving length
(cm) 2nd place
Weft
Number of twists
(TPM) 2nd place
Weft
Weaving length
(cm) Example 1 21 Denier X 4 Piece Silk Filler 4000 10 400 10 Example 2 21 Denier X 4 Piece Silk Filler 4000 5 400 5 Example 3 21 Denier X 4 Piece Silk Filler 4000 One 400 One Example 4 21 Denier X 4 Piece Silk Filler 4000 10 2000 10 Example 5 Polyurethane core yarn
21 Denier X 4 Piece Silk Filler 4000 10 400 10 Comparative Example 1 21 Denier X 4 Piece Silk Filler 4000 0.2 400 0.2 Comparative Example 2 21 Denier X 4 Piece Silk Filler 1000 10 400 10 Comparative Example 3 21 Denier X 4 Piece Silk Filler 4000 10 3500 10

Test Example

The properties of the silk fabrics of Examples 1 to 5 and Comparative Examples 1 to 3 were evaluated in the following manner.

a) silk  Fabric Elastic recovery rate

In order to measure the elastic recovery rate of the silk fabric, a measurement sample (test piece) was prepared so as to include the wrinkled portion and the non-wrinkled portion at a ratio of 50:50, as shown in Fig.

Samples of the silk fabric were stored in a constant temperature and humidity room at a temperature of 20 DEG C and a relative humidity of 65% in a standard state for at least 24 hours to allow the silk fabric to reach equilibrium at normal temperature and humidity conditions. The gauge length of the specimen is 5 cm and marked on the 5 cm portion of the specimen. Using a universal physical property measuring instrument (OTT-003, Oriental TM, Korea), the specimen was pulled at a tensile speed of 1 mm / s and pulled 10 mm. Then, the clamp was stopped and left for 1 minute. The specimen was then removed from the clamp and allowed to stand for 3 minutes. The distance (x) of the specimen displayed on the 5 cm portion was measured using a ruler, and the elastic recovery rate was calculated using the following equation (1).

[Equation 1]

Elastic recovery rate (%) = (10-y) / 10 x 100

In the above equation (1), y is x - 50 and x is the distance (mm) of the specimen displayed at the 50 mm portion.

b) silk  Shirt of fabric

In order to measure the elongation of the silk fabric, first, a measurement sample (test piece) was formed so as to include the wrinkled portion and the non-wrinkled portion at a ratio of 50:50, as shown in Fig. The silk fabric sample was prepared in a length of 7 cm and a width of 5 cm and then stored in a constant temperature and humidity room at a temperature of 20 ° C. and a relative humidity of 65% for 24 hours or longer. The silk fabric was subjected to standard temperature and humidity conditions (OTT-003, Oriental TM, Korea) at a tensile rate of 10 cm / min under a gauge length of 5 cm. The tensile strength and tensile elongation Were measured. The measurement gauge was measured by walking as shown in Fig. 5, and the load cell of the universal physical property measuring instrument was 200 kgf.

c) silk  Shrinkage of fabric

The degree of shrinkage of the fabric was measured in the direction of weft. First, after measuring the length (L ₂₎ in the weft direction for after measuring the length (L ₁₎ in the weft direction, refining / after the drying step the fabric with respect to the fabric before scouring / drying step, to the formula 2 To obtain a shrinkage ratio.

[Equation 2]

Shrinkage (%) = (L ₁ -L ₂ ) / L ₁ 100

The results of physical properties such as shrinkage, elongation, elastic recovery and the like for the silk fabric produced according to Examples 1 to 5 and Comparative Examples 1 to 3 are shown in Table 2 below.

Of silk fabrics
Weft direction
Shrinkage rate
(%) Second-ranked
Per unit length
Number of wrinkles
(cm ^-1 ) Of silk fabrics
Weft direction
Shindo
(%) Of silk fabrics
Weft direction
Elastic recovery rate
(%) Example 1 57.7 3.2 103 100 Example 2 57.0 3.0 99 100 Example 3 56.1 2.3 93 100 Example 4 57.3 1.7 57 100 Example 5 59.7 4.1 114 100 Comparative Example 1 38.9 0.8 31 100 Comparative Example 2 14.8 0.5 23 95.3 Comparative Example 3 56.8 0.4 91 100

As shown in Table 2, according to the present invention, the silk fabrics of Examples 1 to 5, in which the silk yarn having a relatively high twist number and the silk yarn having a relatively low twist number were alternately woven, . ≪ / RTI > In particular, the silk fabrics of Examples 1 to 5 exhibited a high shrinkage in all directions of 55% or more, that is, 56.1% to 59.7%, and the elongation in the weft direction was 50% or more, %, Respectively. In particular, in Example 5, the elongation was the highest at 114%, and the elongation was considered to be larger because the polyurethane core yarn was included in the silk yarn used. Further, it can be understood that the silk fabrics of Examples 1 to 5 have excellent elasticity in all of the elastic recovery rates in the weft direction of 100%. In addition, the embodiment 1-5 of the silk fabric is the second largest helix After a wrinkled measures the number of folds per unit length of the produced parts, all clear wrinkles in one or more per 1 cm by 1 cm ^-1 The number of folds in It can be seen that the pattern is formed.

On the other hand, the silk fabrics of Comparative Examples 1 to 3 all had less than 1 cm ^-1 of wrinkles per unit length, indicating that the wrinkle pattern was not properly equipped. Particularly, in the case of Comparative Example 1, the result is that the length of the first weft yarn in the weft direction is as small as 0.2 cm. In the case of Comparative Examples 2 and 3, the weft twist count of the first weft yarn, And the difference between the number of weft twists of 600 TPM and 500 TPM, respectively. Also, in the case of Comparative Example 1, the shrinkage rate was relatively low (38.9%) despite the high twist of the first weft yarn (4,000 TPM) because the length of the first weft yarn was so small as 0.2 cm, Is not sufficiently contracted. Also, in Comparative Example 2, the shrinkage rate was as low as 14.8%, which is believed to be due to the fact that the warp twist of the first upper shrine is only 1,000 TPM. In the case of Comparative Example 1, the elongation was found to be 31%, which is considered to be because the weaving length of the weft is very small, 0.2 cm, and the shrinkage rate of the fabric is also reduced and the elongation is not high. Also, in Comparative Example 2, the elongation was as low as 23%, which is believed to be due to the lower shrinkage rate and thus the elongation of the silk fabric as the first twist yarn twist is only 1,000 TPM. In addition, in the case of Comparative Example 2, the elastic recovery rate is 85.3%, indicating that the overall elasticity of the silk fabric is not good.

Claims (10)

A first top yarn woven with silk yarn having a twist number of 600 TPM or more and a second top yarn woven with silk yarn having a twist number of 5000 TPM or less,
Wherein the twist of the weft yarn in the first upper yarn portion is at least 2000 TPM or more larger than the twist number of the weft yarn in the second upper yarn portion and the first upper yarn end portion and the second upper yarn end portion are twisted, And the second warp yarns are each 1 cm or more in length in the oblique direction, and the second warp yarns are formed with a crease portion having a number of wrinkles per unit length in the weft direction of 1 / cm or more.
The method according to claim 1,
Wherein the first weft yarn has a weft twist number of 600 to 10,000 TPM and the second weft yarn has a weft twist count of 100 to 5000 TPM.
The method according to claim 1,
Wherein the weft fineness of the first upper yarn portion and the second upper yarn portion is 10 denier or more, respectively.
The method according to claim 1,
Wherein the warp of the first upper yarn portion and the second upper yarn portion is a silk yarn having a fineness of 10 denier or more.
The method according to claim 1,
Wherein the first weft yarn has a weft twist number of 4000 to 6000 TPM and the second weft yarn has a weft twist count of 400 to 2000 TPM.
The method according to claim 1,
A silk fabric having an elongation in the warp direction of 20% or more and an elastic recovery rate in the warp direction of 70% or more.
A first weft yarn using a silk yarn having a twist count of 600 TPM or more as a weft yarn and a second weft yarn using a silk yarn having a twist count of 5000 TPM or less as weft yarns to weave a silk fabric;
Wet processing the woven silk fabric with a solvent; And
A drying step of removing the solvent from the wet treated silk fabric;
Lt; / RTI >
Wherein the twist number of the weft yarn in the first weft yarn part is at least 2000 TPM or more larger than the twist number of the weft yarn in the second weft yarn part and the oblique direction lengths of the first weft yarn part and the second weft yarn part are respectively 1 cm or more, Wherein a wrinkle portion having a number of wrinkles per unit length in the weft direction of not less than 1 / cm is formed on the weft portion.
8. The method of claim 7,
Wherein the weft density of the first weft portion and the second weft portion is 5 yarns / inch or more, respectively.
8. The method of claim 7,
Wherein the wet treatment step is performed at 0.1 DEG C or higher for 0.1 second or longer.
8. The method of claim 7,
Wherein the drying step is performed at 5 DEG C or more for 0.5 hour or more.

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