WO2006103974A1

WO2006103974A1 - Base fabric for chemical lace and process for production thereof

Info

Publication number: WO2006103974A1
Application number: PCT/JP2006/305534
Authority: WO
Inventors: Suguru Mizuki; Satoru Kobayashi; Keisuke Takishima
Original assignee: Kuraray Co., Ltd.
Priority date: 2005-03-25
Filing date: 2006-03-20
Publication date: 2006-10-05
Also published as: JP4796571B2; CN101124361B; JPWO2006103974A1; EP1862585A1; CN101124361A; EP1862585A4; EP1862585B1

Abstract

A base fabric for chemical lace which is composed of a random-web nonwoven fabric made of a water-soluble polyvinyl alcohol fiber and dyed stitch yarn and which satisfies the following requirements: (1) the binder to be added to the nonwoven fabric is a foam made from an aqueous solution containing a polyvinyl alcohol resin and the quantity of the binder adhering to the nonwoven fabric is 2 to 20 % by mass based on the mass of the whole nonwoven fabric, (2) the widthwise strength of the nonwoven fabric at 10% modulus is 15-80 N/50mm width, and (3) the bending resistance of the nonwoven fabric is 40 to 150 mm. The base fabric is inexpensive and excellent in softness, workability, and dimensional stability, little suffers from omission or deviation in embroidered patterns, and permits low dissolution temperature.

Description

Specification

Chemical lace base fabric and method for producing the same

Technical field

The present invention relates to a chemical lace base fabric that is soft, has high dimensional stability, has a low melting temperature, and is inexpensive.

Background art

Conventionally, a woven fabric made of water-soluble polyvinyl alcohol (hereinafter referred to as PVA) long fibers has been mainly used as a base fabric for chemical lace. This woven fabric has the advantage of being able to dissolve and remove the base fabric at a relatively low temperature, which has high dimensional stability and is unlikely to cause deviation of the embroidery pattern, but on the other hand, the long fiber itself is expensive and special weaving. Since a process was required, there was a problem when it became extremely expensive. In addition, since it is a woven fabric, there is a drawback in that needle breakage tends to occur during embroidery when the fabric is hard.

In recent years, the chemical race market has continued to grow steadily as demand in other countries, particularly in Asia, expands. The demand trend is shifting from those mainly made of post-dyed embroidery threads to those made of colorful dyed rayon and pre-dyed polyester. In particular, pre-dyed polyester embroidery yarns that use disperse dyes can be used with recycled polyester. The use of these polyesters is likely to increase because they are environmentally friendly and have excellent gloss, durability, and washing durability.

In the future, it is possible to dissolve and remove from pre-dyed polyester embroidery thread at a temperature of 80 ° C or less, and it is cheap, soft and easy to work with, and has high dimensional stability. Is expected to increase.

[0003] As a base fabric that can be substituted for the expensive water-soluble woven fabric as described above, there is a water-soluble nonwoven fabric, and various attempts using such a nonwoven fabric have been made so far. For example, a non-woven fabric made of PVA-based fibers having a melting temperature in water of 10 ° C or less and heat-fusible has been proposed (for example, see Patent Document 1). However, such special fibers are expensive because of their low productivity. In addition, dimensional stability during embroidery can be ensured by increasing the embossed adhesive area ratio of the nonwoven fabric, but on the other hand, the softness is impaired and needle breakage may occur during embroidery. It becomes. Therefore, a relatively high basis weight ensures dimensional stability during embroidery, but it is difficult to provide a high-quality base fabric.

[0004] Also, an embossed nonwoven fabric of PVA-based spunbond web has been proposed (see, for example, Patent Document 2). Although this production method is suitable for mass production, it is necessary to reduce the degree of polymerization of the raw material resin for spinning stability, and it is difficult to sufficiently perform orientation crystallization by heat treatment, so that the dimensional stability is low. It was difficult to obtain a good base fabric.

[0005] Further, there has been proposed one in which a random web nonwoven fabric and a cloth-like material are joined with a water-soluble adhesive or the like (see, for example, Patent Document 3). However, in order to obtain such a cloth-like material, it was necessary to introduce special equipment, and it was difficult to provide a general-purpose and inexpensive base fabric.

[0006] On the other hand, as a base fabric having good dimensional stability, there are many cases where a random web made of PVA fibers is bonded with a binder aqueous solution containing a water-soluble resin. For example, a web of PVA long fibers is used. A nonwoven fabric bonded with an aqueous binder solution has been proposed (see, for example, Patent Document 4). However, in order to manufacture a nonwoven fabric using PVA-based long fibers, the manufacturing process must be discontinuous, and it was difficult to supply a general-purpose and inexpensive base fabric. In addition, when the base fabric bonded with an aqueous binder solution containing a water-soluble resin is heat-treated, there is a problem that shrinkage increases.

[0007] As a method other than the above, it has been proposed to spray or impregnate a PVA fiber entangled sheet with an aqueous binder solution and perform tension treatment in the width direction during drying (see, for example, Patent Document 5). ). However, in this method, since a relatively large amount of binder resin has to be attached, it has been difficult to satisfy dimensional stability and softness at the same time. Furthermore, when applied to low-temperature-melting type PVA fibers that can use pre-dyed polyester embroidery threads that are susceptible to transfer, swelling and shrinkage due to water occurred, making it difficult to obtain a base fabric with good texture.

[0008] Patent Document 1: Japanese Patent Laid-Open No. 11-217759

Patent Document 2: Japanese Patent Laid-Open No. 2001-279568

Patent Document 3: Japanese Patent Laid-Open No. 2003-129383

Patent Document 4: JP-A-7-054257

Patent Document 5: Japanese Patent Laid-Open No. 018182 Disclosure of the invention

Problems to be solved by the invention

[0009] As described above, in order to obtain an inexpensive chemical lace base fabric that is soft, has high dimensional stability, has a low squeeze temperature, and a low melting temperature, these problems have many obstacles to practical use. The development of a dissolved chemical lace fabric was desired.

An object of the present invention is to provide an inexpensive chemical lace base fabric having a low melting temperature and a method for producing the same, which is soft and has good workability and high dimensional stability and is unlikely to cause embroidery pattern displacement.

Means for solving the problem

[0010] As a result of intensive investigations by the present inventors who have achieved the above-mentioned problems, a binder (hereinafter, referred to as a foam) in which an aqueous solution containing a PVA resin is formed on a random web composed of water-soluble PVA fibers. It is found that a base fabric for chemical lace can be obtained by impregnating and drying a foam-like binder aqueous solution), and cheap, soft, high in dimensional stability and low in melting temperature. It was. This processing method for applying the aqueous binder solution is simple and versatile, and can reduce the amount of moisture adhering compared to conventional spraying and impregnation methods. Since the defect can be adjusted and the energy required for drying can be saved, it is consistent with the problem of the present invention. Furthermore, this processing method, which provides a foam-like binder, concentrates the binder resin in the binder aqueous solution at the fiber entangled part compared to the conventional method, so it has a relatively small amount of binder resin adhesion and high dimensions and dimensions. The present inventors have found that there are advantages that stability is obtained and the softness of the base fabric is not impaired, and the present invention has been completed.

[0011] That is, the present invention is a chemical lace base fabric comprising a random web nonwoven fabric of water-soluble PVA fibers and a pre-dyed embroidery thread and satisfying all of the following conditions.

(1) The binder to be attached to the nonwoven fabric is a foamed aqueous solution containing a PVA resin, and the amount of the binder attached to the total nonwoven fabric weight is 2 to 20% by mass,

(2) The nonwoven fabric has a 10% modulus strength in the horizontal direction of 15 to 80 N / 50 mm width,

(3) The bending resistance of the nonwoven fabric is 40 to 150 mm. [0012] Further, in the present invention, preferably, the water-soluble dissolution temperature of the water-soluble vinyl alcohol fiber constituting the nonwoven fabric is A ° C, and the water dissolution temperature of the polyvinyl alcohol fiber random web nonwoven fabric is B ° C. B—A base fabric for chemical lace as described above, characterized in that A ≦ 5 ° C.

[0013] Furthermore, the above-mentioned chemical lace base fabric is preferably characterized in that the PVA fiber constituting the nonwoven fabric has a dissolution temperature in water of 50 to 80 ° C.

[0014] In addition, the present invention is characterized in that a foam-like aqueous solution containing a PVA-based resin is attached to a base fabric made of a random web nonwoven fabric of water-soluble PVA-based fibers and dyed embroidery yarn, and then subjected to a dry heat treatment. It is the manufacturing method of said base fabric for chemical laces.

The invention's effect

[0015] According to the present invention, there is provided an inexpensive chemical lace base fabric that is soft, has good workability, has high dimensional stability, is less likely to cause embroidery pattern displacement, and has a low melting temperature, and a method for producing the same. That power S.

BEST MODE FOR CARRYING OUT THE INVENTION

[0016] In the present invention, it is necessary to use a water-soluble PVA polymer as the resin constituting the fiber. In the case of a so-called partially saponified PVA in which the unit other than the bull alcohol unit is an acetic acid bull unit as the water-soluble PVA polymer used in the present invention, in order to obtain the preferred water dissolution temperature of 50 to 80 ° C. of the present invention , Les, Shi preferred that Ken I匕度of partial saponification PVA is 95 to 99. 95 mole ^_0/0. Crystallization progresses exceeds 99. 95 mole ^_0/0 at the time and dry heat shrinkage hot drawing, there is a case where the temperature of dissolution in water exceeds 80 ° C.

[0017] When a so-called modified PVA containing a unit other than a bial alcohol unit and a vinyl acetate unit is used, when the modified unit is a unit having a large crystallization inhibitory effect, the modified unit is about 0.5 mol%. The modified PVA polymer may be suitably used in the present invention, but in general, it is preferable to use a modified PVA polymer having a modified unit of 1 mol% or more. In the case of a modified PVA polymer, even if the degree of saponification is higher than that of an unmodified PVA polymer, the dissolution temperature in water can be lowered due to its crystal inhibition effect. On the other hand, if the modifying unit exceeds 20 mol%, the crystallinity is significantly lowered, and not only the fiber physical properties are lowered but also the spinnability is lowered. Les.

[0018] Monomers that form the modified unit include carbon such as ethylene, allylic alcohol, itaconic acid, acrylic acid, vinylamine, maleic anhydride and its ring-opened product, sulfonic acid-containing bur compound, and pivalate bur. Examples thereof include fatty acid bule esters having a number of 4 or more, bull pyrrolidone, and compounds obtained by neutralizing a part or all of the ionic groups. The method for introducing the modification unit may be a copolymerization method or a post-reaction introduction method. The distribution of the modified units in the polymer chain is not particularly limited, whether it is random, block or graft. The degree of polymerization of the polymer is not particularly limited, but from the viewpoint of fiber mechanical performance and versatility, the degree of polymerization is preferably 1000 or more, particularly preferably 1500 or less from the viewpoint of fiber spinnability. Is preferred.

Next, a method for producing the PVA fiber of the present invention will be described.

In the present invention, a fiber excellent in mechanical performance and water solubility can be efficiently obtained by producing a fiber using a spinning stock solution in which a water-soluble PVA polymer is dissolved in water or an organic solvent. Of course, as long as the effects of the present invention are not impaired, the spinning dope may contain additives or polymers other than those described above. Examples of the solvent constituting the spinning dope include water, polar solvents such as dimethyl sulfoxide (DMSO), dimethylacetamide, dimethylformamide, and N-methylpyrrolidone, polyhydric alcohols such as glycerin and ethylene glycol, and these solvents. A mixture of swellable metal salts such as rhodan salts, lithium chloride, calcium chloride, and zinc chloride, and also a mixture of these solvents, or a mixture of these solvents and water. DMSO is most suitable in terms of low-temperature solubility, low toxicity, low corrosivity, and the like.

The polymer concentration in the spinning dope varies depending on the composition, degree of polymerization, and solvent, but is preferably in the range of 8 to 40% by mass. The liquid temperature at the time of discharging the spinning stock solution is in a range where the spinning stock solution is not gelled, decomposed, or colored, and is preferably in the range of 50 to 150 ° C.

[0020] It is only necessary to discharge the raw, spinning solution from the nozzle and perform wet spinning or dry-wet spinning. The PV A polymer may be discharged into a solidified solution having a solidifying ability. Especially when discharging the spinning dope from multiple holes, it is dry and wet from the standpoint of preventing the fibers from sticking together. The wet spinning method is preferable to the spinning method. The wet spinning method is a method in which a spinning stock solution is discharged directly from a spinneret into a solidification bath, while the dry and wet spinning method is a method in which a spinning stock solution is temporarily discharged from a spinneret into air or an inert gas. And then it is introduced into the solidification bath.

[0021] The solidification bath differs depending on whether the stock solution is an organic solvent or water. In the case of a stock solution using an organic solvent, a solidified solvent and a mixed solution having a stock solvent power are preferred from the viewpoint of fiber strength and the like. Examples of the solidified solvent include alcohols such as methanol and ethanol, acetone, and methyl ethyl ketone. Organic solvents with solidification ability for PVA polymers such as ketones such as methanol, especially organic solvents consisting of methanol and DMSO are preferred, and the mass ratio of solidification solvent / stock solvent in the solidification bath is 25/75 to 95 / 5, preferably 55/45 to 80/20 is preferable from the viewpoint of spinning processability and solvent recovery. The temperature of the solidification bath is preferably 30 ° C or less, and in particular for uniform cooling gelation, it is 20 ° C or less, more preferably 15 ° C or less.

On the other hand, when the spinning dope is an aqueous solution, the solidifying solvent constituting the solidifying solution is preferably an aqueous solution of an inorganic salt having a solidifying ability with respect to a PVA polymer, such as sodium sulfate, sodium chloride, and sodium carbonate. . Naturally, the solidification bath may be either acidic or alkaline.

Next, the solvent of the spinning dope is extracted and removed from the solidified yarn. The ability to wet-draw the shinoshino during extraction is preferable from the standpoint of suppressing inter-fiber sticking during drying and further increasing the strength of the resulting fiber. The wet draw ratio is preferably 1.5 to 6 times. Extraction is usually performed by passing through multiple extraction baths. As the extraction bath, a solidified solvent alone or a mixed solution of a solidified solvent and a stock solvent is used, and the temperature of the extraction bath is usually in the range of 0 to 50 ° C.

[0023] Then, if necessary, an oil agent or the like may be applied and dried. The drying temperature is preferably 210 ° C or lower, and in particular, multistage drying in which drying is performed at a low temperature of 160 ° C or lower in the initial stage of drying and at a high temperature in the latter half of drying is preferable. Further, dry heat stretching and, if necessary, dry heat shrinkage are performed to align and crystallize the PVA molecular chains, thereby adjusting the strength, water resistance and heat resistance of the fiber. In order to improve the mechanical performance of the fiber, the total draw ratio under the temperature condition of 150-250 ° C It is preferable to perform dry heat stretching so that the ratio is 3 times or more, particularly 5 times or more. By setting the total draw ratio to 3 times or more, it becomes possible to obtain fibers having a strength of 1.5 to 4. OcN / dtex, and by setting the total draw ratio to 5 times or more, a fiber having a strength of 4 cN / dtex or more. In the present invention, the total draw ratio is a ratio represented by the product of the wet heat draw ratio and the dry heat draw ratio.

[0024] Further, if necessary, an oil agent or the like is applied and crimped. Conventionally known methods are used as the crimping method. In order to impart sufficient crimp to the PVA fiber, dry heat pre-heat treatment is performed in advance and introduced into a mechanical crimper to impart crimp. Next, a method of firmly cooling the crimped form by cooling to below the glass transition temperature is suitable.

[0025] The fineness of the fiber of the present invention thus produced is preferably 0.5 to 5 dtex. If it is less than 5 dtex, the fiber strength is insufficient and damage to the needle during embroidery increases. If it exceeds 5 dtex, the texture of the nonwoven fabric will deteriorate, causing the embroidery pattern to jump and shift, making it difficult to achieve good embroidery. More preferably, it is 1 to 3 dtex.

[0026] The dissolution temperature in water of the PVA fiber used in the present invention is preferably 50 to 80 ° C.

If the dissolution temperature in water is less than 50 ° C, swelling and shrinkage due to water occur immediately and the shrinkage in the drying process after application of the resin binder aqueous solution becomes large, and a nonwoven fabric with good texture cannot be obtained. This drying shrinkage can be suppressed entirely by using a pin tenter or sandwich net, but it is difficult to prevent local formation of spots. On the other hand, if the fiber dissolution temperature in water exceeds 80 ° C, it becomes difficult to completely dissolve and remove the base fabric after embroidery. More preferably, it is 55 to 75 ° C.

[0027] Next, a method for producing a nonwoven fabric comprising the PVA fibers of the present invention will be described.

As the random web nonwoven fabric of the present invention, a web prepared by a conventionally known card method, air raid method or the like in which a dry nonwoven fabric in which the orientation of fibers constituting the nonwoven fabric is random is preferred is used. In addition, as a method of randomizing the fiber orientation, a force chemical lace base fabric using a conventionally known cross wrap method or a criss-cross method is applied. In order to suppress the jumping and deviation of the embroidery pattern, it is preferable that the fiber orientation is random.

[0028] basis weight of the nonwoven fabric of the present invention produced by the manufacturing method described above, 15 to 50 g / m ² der Rukoto are preferred. If the basis weight is less than 15 g / m ² , the number of fibers will decrease and the formation will be reduced. It becomes non-uniform and the embroidery pattern is likely to fly or shift. In addition, since the strength of the base fabric itself is insufficient, the processability during embroidery is extremely reduced. If the basis weight exceeds 50 g / m ^2, since the soft power of nonwoven not Chikarari If price is high is impaired, stretched work of the base fabric to tie crowded work and embroidery machine base cloths using a sewing Sometimes workability is reduced. In addition, since the mass of the base fabric to be dissolved and removed increases, the costs for dissolution and wastewater treatment increase, which is not preferable. More preferably from 20 to 40 g / m ^2.

In the present invention, the nonwoven fabric obtained by the production method described above is impregnated with a foam-like binder and then subjected to a dry heat treatment to obtain a flexible nonwoven fabric with good dimensional stability.

Furthermore, when embroidering is performed on the nonwoven fabric treated with the foam-like binder using a pre-dyed embroidery thread, it is possible to obtain a chemical lace base fabric with less embroidery pattern jumping and displacement.

Here, the type of the dyed embroidery thread is not particularly limited, but polyester-based or rayon-based embroidery threads are preferably used.

[0030] As the binder to be adhered to the nonwoven fabric of the present invention, a foamed aqueous solution containing a PVA resin is used. The foam-like binder aqueous solution having the above composition is prepared by, for example, dissolving a PVA resin in water while stirring in a dissolver to prepare a PVA aqueous solution having a predetermined concentration, and then adding an auxiliary agent and a penetrating agent as necessary. It can be prepared by foaming by blowing air into the aqueous solution in the dissolver. For example, the prepared foam binder aqueous solution can be applied by letting the foam binder aqueous solution flow down from a nozzle onto a web made by the card method, or by feeding the web onto a roller with a foam binder aqueous solution on the surface. Impregnation and application by contact. In the present invention, by performing a dry heat treatment after impregnation and application, the binder resin in the aqueous binder solution concentrates and concentrates on the entangled portion of the fiber when the foam aqueous binder solution breaks, and conventional spraying is performed. Compared to the method and impregnation method, the same adhesion can be obtained with a relatively small amount of resin adhesion. Therefore, there is an advantage that the softness of the nonwoven fabric, that is, the bending resistance described later can be easily ensured as compared with the conventional method in which the resin adheres other than the entangled portion of the fiber. In addition, since the amount of moisture attached to the nonwoven fabric is reduced, the energy required for drying can be saved. Furthermore, in the water When using low-melting-type PVA fibers that are more likely to swell and shrink, the amount of moisture attached can be reduced, so swelling and shrinkage can be suppressed, and there is no need for special devices such as pin tenters, sandwich nets, etc. Can be obtained.

Further, since the swelling / shrinkage of the base fabric is suppressed, the base fabric can obtain high strength even at low elongation without impairing the strength and elongation properties of the fibers constituting the base fabric. % Modular strength is easy to obtain.

[0031] The amount of the aqueous binder solution of the present invention needs to be 2 to 20% by mass with respect to the total mass of the nonwoven fabric. If it is less than 2% by mass, the adhesive strength with the non-woven fabric is insufficient and the strength required for the base fabric cannot be obtained. If the amount exceeds 20% by mass, the amount of resin attached to the fiber other than the entangled part will increase, the softness of the non-woven fabric will be impaired, and at the same time, the non-woven fabric will reach its peak, and the binder resin concentration will increase. Wrapping trouble is likely to occur. Preferably it is 3 ~: 17 mass%, More preferably, it is 4 ~: 15 mass%. The aqueous binder solution preferably contains a surfactant having a foaming and penetrating action. Examples of the surfactant include alkyl ether sulfonic acid type, dodecino benzene sulfonic acid type, and castor oil sulfate. In addition to the surfactant, a softening agent, a pH adjuster, etc. may be added.

[0032] Next, a drying process by dry heat is performed. There are no particular limitations on the drying treatment conditions by dry heat, and it is preferably carried out in a hot air oven with a force of 100 ° C. or higher, such as hot air drying and cylinder drying.

By performing such a dry heat treatment, it is possible to obtain a base fabric for chemical lace having a high-quality embroidery pattern that is flexible and has good dimensional stability, vivid color, and high quality.

[0033] One of the most important qualities required for a chemical lace fabric is a 10% modulus strength in the horizontal direction. In general, embroidery is performed by holding the base fabric with clips etc. and stretching it in the horizontal direction by several percent. At this time, the base fabric is required to be strong at breakage. The modulus strength is high. In the nonwoven fabric of the present invention, it is 10 in the horizontal direction. /. The modulus must be 15 to 80NZ50mm wide. If the 10% modulus strength in the horizontal direction is lower than 15N / 50mm width, the base fabric will be stretched by the tension at the time of embroidery. Since embroidery cannot be obtained, it is not preferable. On the other hand, if the 10% modulus strength in the horizontal direction exceeds 80N / 50mm width, there will be no problem of skipping or shifting of the embroidery pattern. Work efficiency such as spreading the base fabric on the table is extremely reduced. A preferable range of 10% modulus strength in the horizontal direction is 20 to 70 NZ50 mm width, and a more preferable range is 25 to 60 N / 50 mm width.

The 10% modulus strength of the nonwoven fabric in the vertical direction is as important as the horizontal direction, but the 10% modulus strength is preferably 10N / 50mm width or more. If the 10% modulus strength in the warp direction is too low, the fabric will be cut in the warp direction during embroidery extension, and problems may occur during the shirring process after embroidery.

[0034] Further, the bending resistance of the nonwoven fabric of the present invention should be 40 to 150 mm. If it is less than 40mm, the base fabric will be too soft and embroidery patterns will be skipped or misaligned. In addition, if it exceeds 150 mm, the base fabric becomes rugged, and work that requires softness of the base fabric, for example, bonding between the base fabric and the sewing machine, guiding cloth or base fabric with the sewing machine between the base fabrics If workability such as spreading on an embroidery machine is remarkably reduced, wrinkles are easily generated when the original fabric is wound after embroidering by force, and continuous preparation of the original fabric becomes difficult. The bending resistance of the nonwoven fabric is preferably 50 to 140 mm, more preferably 60 to 130 mm. The bending resistance of the nonwoven fabric is measured by the method described later.

[0035] Among the qualities required for a base fabric for chemical lace, one of the important factors along with the 10% modulus strength in the horizontal direction is the melting temperature of the nonwoven fabric in water. In general, the lower the temperature at which the nonwoven fabric dissolves, the more the dye can be prevented from falling off or reattaching when the base fabric after embroidery is dissolved and removed. Is the most important requirement. Specifically, when the water dissolution temperature of the PVA fiber used is A ° C and the water dissolution temperature of the nonwoven fabric obtained using the PV A fiber is B ° C, it is preferable that B_A ≤ 5 ° C. More preferably, B_A≤4 ° C, more preferably B_A≤2 ° C. In the present invention, B_A ≦ 5 ° C. can be achieved by applying an aqueous solution of foamed water-soluble PVA resin as a binder to the nonwoven fabric. By setting B_A ≤ 5 ° C, energy can be saved in the melting process, and it is easy to obtain a fabric for chemical lace with a soft texture. B— When A exceeds 5 ° C, when the base fabric after embroidery is dissolved and removed There is a risk that the dye may fall off from the pre-dyed embroidery thread. In particular, the conventional spraying method and the impregnation method are not preferable because the B—A force exceeds ¾ ° C, and the dye is detached from the pre-dyed embroidery thread and reattached.

[0036] The present invention also provides a dry heat treatment after a foam-like aqueous solution containing a polybulualcohol resin is adhered to a base fabric made of a random tube nonwoven fabric of water-soluble polybulcoalcohol fibers and a pre-dyed embroidery thread. The method for producing a base fabric for chemical lace according to the present invention is also provided.

[0037] Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited to the examples. In the present invention, the dissolution temperature of the fiber or the nonwoven fabric in water is 10. /. The modulus strength, bending resistance, and fiber strength were determined by the following methods.

[0038] (1) Fiber dissolution temperature in water A (° C)

Add several tens of milligrams of water-soluble fiber cut to a length of 1 to 2 mm in 100 cm ³ of water, heat up under stirring at a heating rate of 1 ° C / min, and when the fiber is completely dissolved The temperature was measured as the dissolution temperature A in water.

[0039] (2) Non-woven fabric dissolution temperature B (° C)

^Three pieces of non-woven fabric or paper cut into 2 cm square were put into 400 cm ³ of water, and the temperature was raised while stirring at a heating rate of 1 ° C / min and a stirring rate of 280 rpm, and the fibers were completely dissolved. The temperature at that time was measured as the dissolution temperature B in water.

[0040] (3) 10% modulus strength (N / 50mm width)

The nonwoven fabric is cut into 50 mm x 170 mm in the vertical and horizontal directions, respectively, and the tensile strength is measured using an Instron tensile tester under the conditions of a sample gripping interval of 100 mm, a gripping width of 25 mm, and a tensile speed of 100 mm / min. The intensity at 10% elongation was read.

[0041] (4) Bending softness (mm)

Measured by JIS cantilever 40.5 degree method.

[0042] (5) Fiber strength (cN / dtex)

Measured according to JIS L1013.

[0043] Example 1

(1) PVA with a polymerization degree of 1750 and a saponification degree of 99 mol% in dimethyl sulfoxide (DMSO) The mixture was stirred at 240 rpm under a nitrogen stream at 90 ° C. for 10 hours and dissolved to obtain a spinning dope having a polymer concentration of 20% by mass. The spinning solution thus obtained was wet-spun into a solidification bath having a methanol / DMSO mass ratio of 70/30 and a temperature of 10 ° C. through a spinneret having a hole number of 15,000 holes and a hole diameter of 0.16 mm. Next, 3.0 times wet stretching was performed while extracting DMSO with an extract composed of methanol at 25 ° C. After that, it was dried at 150 ° C for 8 minutes in a nitrogen atmosphere, and was subjected to 2.0 times dry heat drawing at 170 ° C, followed by crimping and cutting, fineness of 33,000 dtex, strength 7.2 cN / dtex, A PVA crimped fiber having a water dissolution temperature A of 72 ° C was obtained. Table 1 shows the performance of the fibers.

(2) A random web consisting of 100 parts by mass of the obtained PVA fiber was prepared, and an aqueous solution consisting of 5% by mass PVA, the same as the fiber, and “BEROL_48” (linear alkylbenzene sulfonate) was used as a surfactant. Foamed with a mixer, impregnated into the random web, and dried at 70 ° C. to obtain a nonwoven fabric. As shown in Table 2, the performance of the nonwoven fabric was soft, with a bending resistance of 118 mm, good workability, and a 10% modulus strength of 27.8 (N / 50 mm width).

(3) When embroidered on the non-woven fabric obtained in (2) above using commercially available embroidery yarn made of pre-dyed polyester fiber, it is suitable as a base fabric for chemical lace where the embroidery pattern can be prevented from jumping or shifting. there were. In addition, even when using a commercially available pre-dyed polyester embroidery thread that has a melting temperature B in water of 74 ° C and B-A of 2.0 ° C and is prone to transfer, the base fabric after embroidery is used. After the cloth was dissolved and removed, the embroidery thread did not lose the dye and did not adhere again, and an embroidery cloth with a clear and high-quality embroidery pattern was obtained.

Example 2

Spinning is carried out in the same manner as in Example 1 except that PVA with a polymerization degree of 1750 and a Kenya degree of 96 mol% is used. Fineness is 850,000 dtex, strength is 6.2 cN / dtex, and the dissolution temperature in water is 65 ° C. Of PVA crimped fibers were obtained. The performance of the fiber is shown in Table 1. In addition, a nonwoven fabric was produced using the fibers under the same conditions as in Example 1. As shown in Table 2, the performance of the nonwoven fabric is as soft as 86 mm and has good workability. Further, the 10% modulus strength is as high as 19.4 (N / 50 mm). When the same embroidery thread was used for embroidery, it was suitable as a base fabric for chemical laces, where the embroidery pattern jumped out. Also after the embroidery Since the fabric dissolution temperature B in water is 68.5 ° C and B—A is 3.5 ° C, after the base fabric is dissolved and removed, the embroidery thread does not fall off and reattach to the embroidery pattern. An embroidery cloth having a clear and high-class feeling was obtained.

[0045] Example 3

(1) PVA with a degree of polymerization of 1750 and a chain degree of 98.5 mol% was added to water as a fiber raw material, and dissolved by stirring at 240 rpm for 10 hours at 90 ° C to obtain a spinning stock solution with a polymer concentration of 17% by mass. Obtained. The obtained spinning solution was spun into a 40 ° C acidic coagulation bath made of a saturated sodium sulfate aqueous solution through a spinneret having a hole number of 15,000 holes and a hole diameter of 0.16 mm for coagulation. Further, the obtained shinoshino was wet-heat-stretched with a roller draft of 3.0 times, washed with water, further dried at 130 ° C, and then dry-heated at 170 ° C with a draw ratio of 2.0 times. , Crimping and cutting, fineness 3.

30,000 dtex, strength 3. lcN / dtex, water melting temperature A was 76 ° C PVA crimped fiber. The performance of the fiber is shown in Table 1.

(2) Further, a nonwoven fabric was produced under the same conditions as in Example 1. As shown in Table 2, the performance of the non-woven fabric was as soft as 139 mm in bending resistance and good in workability, and further as high as 10% modulus strength was 35.3 (N / 50 mm).

(3) When the non-woven fabric obtained in the above (2) was embroidered using the same embroidery thread as in Example 1, it was suitable as a chemical lace base fabric with no embroidery pattern jumping. Also, since the dissolution temperature B of the base fabric after embroidery is 78 ° C and B-A is 2.0 ° C, the dye does not fall off from the embroidery thread and does not reattach after the base fabric is dissolved and removed. An embroidered cloth with a clear and high-quality pattern was obtained.

[0046] Comparative Example 1

As a nonwoven material, a random web similar to that in Example 1 was prepared, and the random web was impregnated with a 1% by mass aqueous solution made of the same PV A as the fiber material, squeezed, and dried at 70 ° C. Obtained. As shown in Table 2, the performance of the nonwoven fabric is as high as 10% modulus strength is 54.8 (N / 50mm width), but the softness is too high at 162mm, so the texture is hard. Thus, although embroidery was attempted using the same embroidery thread as in Example 1, it was not suitable as a chemical lace base fabric with poor workability such as a needle breaking during embroidery.

[0047] Comparative Example 2 A random web similar to that in Example 1 was prepared as a nonwoven material, and a 1% by mass aqueous solution composed of the same PV A as the fiber material was foamed, impregnated into the random web, and dried at 70 ° C to obtain a nonwoven fabric. It was. As shown in Table 2, the nonwoven fabric has a low 10% modulus strength of 7.8 (NZ 50 mm width). Therefore, when the embroidery is applied using the same embroidery thread as in Example 1, the embroidery pattern jumps. As a result, it was suitable as a base material for chemical lace.

[0048] Comparative Example 3

A random web similar to that of Example 1 was prepared as a nonwoven material, and a nonwoven fabric was obtained by passing between a heated embossing tool and a steel roll. The embossing conditions at this time were a bonding area ratio of 12%, a temperature of 195 ° C, a linear pressure of 329 N / cm, and a processing speed of 5 m / min. As shown in Table 2, the performance of the non-woven fabric is the force S that the embroidery property was reasonable, the water dissolution temperature of the base fabric after embroidery was 86.5 ° C, and the difference from the fiber dissolution temperature in water was 14.5. Since the temperature reached ° C, the dye was dropped and reattached when the base fabric after embroidery was dissolved and removed, making it unsuitable for a chemical lace base.

[0049] [Table 1]

[0050] [Table 2]

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 im 40. 2 39. 7 40. 3 40. 4 40. 0 39. 8 ≤p ffQ

Thickness (mm) 0. 16 0. 16 0. 17 0. 16 0. 1 7 0. 35 Foam

Resin adhesion amount

8. 3 7. 6 8. 5 27. 9 1. 6 0 (mass%

/ PVA)

Horizontal direction

10% modular

27. 8 19. 4 35. 3 54. 8 7. 8 28. 0 Lath strength

(N / 50mm width)

Flexibility (m

(1 18 86 1 39 162 8 1 62 m)

Dissolution in water

74. 0 68. 5 78. 0 76. 0 74. 0 86.5 Temperature B (.C)

B-A (° C) 2. 0 3. 5 2. 0 4. 0 2. 0 14.5 Embroidery texture

Embroidery pattern flying Dye removal Good Good Good Workability

■ Misalignment Falling · Adhesion Yes Bad

Overall evaluation Good Good Good No No No No Industrial applicability

ADVANTAGE OF THE INVENTION According to the present invention, it is possible to provide an inexpensive chemical lace base fabric that is soft, has good workability, has high dimensional stability, is less prone to embroidery pattern displacement, and has a low melting temperature, and a method for producing the same. it can.

Claims

Claims [1] A chemical lace base fabric comprising a random web non-woven fabric of water-soluble polybulal alcohol fiber and a pre-dyed embroidery thread, which satisfies all of the following conditions.

(1) The binder to be adhered to the nonwoven fabric is a foamed aqueous solution containing a polybutyl alcohol resin, and the amount of the binder adhered to the total mass of the nonwoven fabric is

2 to 20 weight ^_0/0,

(3) The bending resistance of the nonwoven fabric is 40 to 150 mm.

[2] BA≤5 ° C, where the water solubility temperature of the water-soluble vinyl alcohol fiber constituting the nonwoven fabric is A ° C, and the water solubility temperature of the random web nonwoven fabric of polyvinyl alcohol fiber is B ° C. 2. The chemical lace base fabric according to claim 1, wherein:

[3] The base fabric for chemical laces according to claim 1 or 2, wherein the water-soluble polybutyl alcohol fiber constituting the nonwoven fabric has a water dissolution temperature of 50 to 80 ° C.

[4] A water-soluble polyvinyl alcohol-based fiber random web nonwoven fabric and a base fabric made of pre-dyed embroidery thread are adhered to a foam-form aqueous solution containing a polyvinyl alcohol-based resin, followed by a dry heat treatment. The manufacturing method of the base fabric for chemical laces of any one of Claims 1-3.