JPH0913252A - Composite nonwoven fabric and interlining cloth using the same - Google Patents

Abstract

PURPOSE: To obtain composite nonwoven fabric, capable of readily extending with a small force at a low elongation, hardly extending at a high elongation and suitable for interlining cloth having a moderate strength by sewing latently crimpable yarn into a warp knitted state in nonwoven fabric and then carrying out the relaxing heat treatment. CONSTITUTION: This composite nonwoven fabric is formed by passing a mixed cotton web of nylon fibers with polyester fibers through heated embossing rollers, carrying out the partial fusion treatment and sewing polyester latently crimpable yarns into a warp knitted state such as chain stitch knitting in the resultant nonwoven fabric with a raschel knitting machine. The heat-setting treatment of the resultant composite nonwoven fabric is then carried out while applying 5-30%, preferably 5-20% overfeed ratio in the warp direction with a tender, etc. Thereby, the slackness is provided in the stitch and crimps of the latently crimpable yarns are developed to afford the composite nonwoven fabric having >=3 ratio of 10% modulus/5% modulus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite non-woven fabric which is useful as a base material for clothes interlinings, medical patches, bandages and the like.

[0002]

2. Description of the Related Art There are various kinds of materials such as an interlining material for clothes which can follow the proper elongation of a conventionally used surface material and a poultice which can follow the bending and stretching of arms and legs. A woven or knitted product using a stretchable yarn such as spandex yarn can obtain a large elongation, but it is difficult to stop the elongation at a relatively low elongation to stabilize the shape, and the price is high. In the case of non-woven fabric using fibers such as latent crimp,
Although the elasticity is high, there is a disadvantage that the strength is not sufficient. In particular, in the case of interlining of clothes, it may be desirable to stretch well with a small force at low elongation, and it is difficult to elongate at an appropriate elongation, and it is desirable to have shape retention, but stretchable yarn such as conventional spandex yarn may be used. In the case of the used woven or knitted fabric or the nonwoven fabric using fibers with latent crimpability, it is difficult to obtain only a material having a large elongation, and it is difficult to obtain a base material having such physical properties. Therefore, a composite non-woven fabric obtained by knitting a non-woven fabric with a latent crimped yarn having elasticity was studied.Since the composite non-woven fabric is fixed in a state where the latent crimped yarn is pulled by tension or the like during the process. However, there has been a problem that the stretchability of the latent crimped yarn is impaired and the body and the surface material cannot be sufficiently moved.

[0003]

SUMMARY OF THE INVENTION The present invention provides a composite non-woven fabric and an interlining which can be stretched with a small force at a low elongation, but are hardly stretched at a high elongation and have excellent morphological stability and can impart appropriate strength. The purpose is to

[0004]

A non-woven fabric having a 10% modulus / 5% modulus ratio of 3 or more according to the present invention comprises:
A composite non-woven fabric in which a crimp-expressing yarn is warp-knitted, for example, by chain stitch knitting, and in particular, the heat-setting is performed in the warp knitting, for example, in a state of overfeeding. It is loosened by such things as. Further, the present invention is a composite nonwoven fabric having an unprecedented elongation characteristic by providing a warp knit with loose eyes.

In the method for producing the composite non-woven fabric according to the present invention, the latent crimped yarn is warp-knitted in the non-woven fabric by, for example, chain stitch knitting, and then 5-30%, preferably 5-20% in the warp direction. While applying heat, the latent crimped yarn is crimped.

[0006] The composite nonwoven fabric is preferably used for interlining, and may be subjected to post-processing such as dyeing, dotting of an adhesive resin, and slitting.

The nonwoven fabric 1 used in the present invention may be manufactured by any known web forming method such as a dry method, a wet method, and a melt spinning method. Any method such as a water entanglement method may be used, but a heat-sealed nonwoven fabric or a nonwoven fabric entangled with a water stream in which a web of a dry method is bonded by a point-like heat fusion method from the viewpoint of a texture suitable for interlining of clothes and the like. Is particularly preferred.

The latent crimped yarn 2 used as the warp knitting yarn of the invention of the present application has a potential crimping property, and includes a processed yarn and a resin subjected to heat history during the yarn manufacturing process. Threads composed of bonded or core-sheath composite fibers composed of components having different molecular weights, melting points, crystallinities, etc. even if they are different components or the same component are suitable. It is preferable to use a textured yarn (textured yarn according to the thread-thread method) that is false-twisted after being false-twisted (heated) and heat-set. It is desirable that these latent crimped yarns exhibit crimpability by heating and have stretchability.

The latent crimped yarn 2 is sewn into the non-woven fabric 1 in a vertical knitting structure by, for example, a Russell knitting machine or a chain stitch sewing machine. The vertical stitch includes a chain stitch stitch. FIG. 1 is a plan view of the composite nonwoven fabric of the present invention, and shows an example in which several linear vertical stitches are formed in parallel by chain stitch knitting. FIG.
FIG. 3 is an enlarged view of the structure of chain stitch knitting seen from the vertical cross section of the composite non-woven fabric, and FIG. 3 is an explanatory view showing a state in which the non-woven fabric has a vertical knitting structure by chain stitch.

Thereafter, the warp-woven non-woven fabric is heat-set in a state of being over-fed so that the warp knitting has looseness (open stitches). To do. By doing so, the degree of freedom of looseness of the stitch is given, and the latent crimped yarn is crimped by heat to give stretchability to the latent crimped yarn. A composite non-woven fabric is obtained which is stretched with a very small force, and when stretched to such an extent that the looseness of the stitches is eliminated, it becomes difficult to stretch and the shape retention is improved. As a result, the composite non-woven fabric of the invention of this application has a 5% modulus showing a stress necessary for 5% elongation which is a low elongation,
The ratio of 10% modulus / 5% modulus with the 10% modulus which shows the stress necessary for 10% elongation is 3 or more, and it has unprecedented physical properties. It should be noted that, in the case of warp knitting with a conventional filament yarn or the like instead of the latent crimped yarn, such physical properties cannot be obtained even if the stitches are loosened, and the latent crimped yarn is used to form a composite. Even if a non-woven fabric is manufactured, the ratio of 10% modulus / 5% modulus is 3 unless looseness is provided in the knitting as in the conventional case.
It is less than 100%, and it is impossible to obtain such physical properties.

The heat setting is performed in a state where overfeed is applied, and examples of the method include a tenter system and a cylinder system. In particular, a tenter method capable of applying overfeed while holding both ends of the composite nonwoven fabric is preferable because the amount of overfeed can be accurately controlled.

The overfeed is preferably 5 to 30%, more preferably 5 to 20%. When the overfeed is less than 5%, the warp knitting of the latent crimped yarn cannot be loosened, and it becomes difficult to extend even at low elongation. When the overfeed exceeds 30%,
It easily extends to the range of high elongation, and shape retention cannot be obtained.

Further, the temperature of the heat setting is preferably higher than the temperature applied to the latent crimped yarn during the process before the heat setting, 110 to 260 ° C, more preferably 140 to 200 ° C. Is good.

Further, the composite nonwoven fabric may be treated with a softening agent such as silicon or a water repellent such as fluororesin before and after the heat setting treatment. The heat-set composite nonwoven fabric may be coated with a thermoplastic adhesive such as polyamide or polyester, if necessary, in an amount of 3 to 25 g / m ² , particularly preferably 5 to 15 g.
/ M ² , for example, by dot processing.

The composite non-woven fabric of the invention of this application is superior in stretchability, soft feeling, flexibility and the like as compared with the conventional non-crimped non-woven fabric having warp knitting yarns. At low elongation, it can be stretched with a small force, but at high elongation, it is difficult to stretch and has excellent morphological stability and moderate strength. It also has excellent shape.

[0016]

EXAMPLES The invention of the present application will be specifically described below with reference to examples, but the invention is not limited thereto. Example 1 60% by weight of 6 nylon fibers (melting point 215 ° C.) having a fineness of 1.5 denier and a fiber length of 47 mm, and a fineness of 1.3 denier,
38 mm long polyester fiber (melting point 265 ° C) 4
The web consisting of 0% by weight is partially heat-bonded in spots with an embossing roll at a temperature of 220 ° C. to give a basis weight of 25 g / m 2.
A heat-bonded nonwoven fabric of No. ² was produced. To this non-woven fabric, polyester processed yarn (latent crimped yarn) by 30 denier thread method is used by Russell knitting machine (RS3MSU of KARL MAYER).
-V) was used to carry out chain stitch knitting of 3.5 courses / cm, 18 gauge to produce a composite nonwoven fabric.
Then, the composite non-woven fabric was heat-set at a temperature of 170 ° C. while applying about 12% overfeed using a tenter, and the looseness (open) basis weight of the chain stitch knitting with the processed yarn was 33 g / m ² A composite non-woven fabric of This composite non-woven fabric was dot processed with a low melting point polyamide resin, and the number of dots was 335 dots per square inch, and the adhesion amount was 1
It was carried out at 1 g / m ² to obtain an adhesive interlining having a basis weight of 44 g / m ² .
The 5% modulus of the obtained adhesive interlining is 0.42 kg / 5.
cm width, while 10% modulus is 1.98kg / 5c
10% modulus / 5% modulus is 4.71 in m width
Therefore, it was found that in a low elongation region, it is elongated with a slight force, and when the elongation is increased, a large force is required for the elongation, and the shape retention is excellent.

The physical properties of this adhesive interlining are as shown in Table 1.

[0018]

Table 1 Horizontal Yoko KES1 EMT 4.14 Unmeasurable KES2 EMT 7.70 17.19 B 0.25 0.10 G 2.19 1.93 The physical properties of the interlining were evaluated by the KES test method. EMT
Is the tensile elongation at constant load (unit:%), B is the bending rigidity per unit length (unit: gf · cm ² / c)
m) and G are shear rigidity per unit width (unit: gf / c)
m · degree). In KES1, the interlining alone was evaluated, and its EMT was the elongation under a load of 50 g. In KES2, it was evaluated with the composite cloth of the interlining and the outer material (wool tropical), and its EMT was the elongation under a load of 500 g. is there.

Comparative Example 60 nylon 6 fibers (melting point 215 ° C.) having a fineness of 1.5 denier and a fiber length of 47 mm, and a fineness of 1.3 denier.
38 mm long polyester fiber (melting point 265 ° C) 4
The web consisting of 0% by weight is partially heat-bonded in spots with an embossing roll at a temperature of 220 ° C. to give a basis weight of 25 g / m 2.
A heat-bonded nonwoven fabric of No. ² was produced. To this non-woven fabric, polyester processed yarn (latent crimped yarn) by 30 denier thread method is used by Russell knitting machine (RS3MSU of KARL MAYER).
-V) was used to carry out chain stitch knitting of 3.5 courses / cm, 18 gauge to produce a composite nonwoven fabric.
This composite non-woven fabric was heat set at a temperature of 170 ° C. without overfeeding it using a cylinder dryer, and a composite non-woven fabric with chain stitch knitting with a loose basis weight of 32 g / m ² was obtained using the processed yarn. This composite non-woven fabric was dot processed with a low melting point polyamide resin, the number of dots was 335 dots / square inch, and the adhesion amount was 11 g / m.
² to obtain an adhesive interlining having a basis weight of 43 g / m ² . The 5% modulus of the obtained adhesive interlining is 3.49 kg / 5 cm width, while the 10% modulus is 5.75 kg / 5 cm width, the 10% modulus / 5% modulus is 1.67, and even at low elongation. It needed strength to stretch and was poor in following the outer material. The physical properties of this adhesive interlining are as shown in Table 2.

[0020]

[Table 2] Horizontal Yoko KES1 EMT 1.10 Unmeasurable KES2 EMT 3.82 16.44 B 0.33 0.12 G 3.55 3.47

Example 2 A polyester fiber having a fineness of 0.8 denier and a fiber length of 38 mm (melting point 265 ° C.) was carded to prepare a web. This web is entangled by hydroentanglement, with a basis weight of 25 g
A nonwoven fabric of / m ² was prepared. A polyester denier wound knitting yarn of 30 denier was applied to this non-woven fabric using a Russell knitting machine (RS3MSU-V manufactured by Karlmeier Co., Ltd.) in the same manner as in Example 1, and 18-gauge chain stitch knitting was performed to produce a composite non-woven fabric. . Using a tenter, this composite non-woven fabric is heated at a temperature of 1% while applying about 12% overfeed.
Heat set at 70 ° C, loose stitch (open) with chain stitch knitting with processed yarn, 33 g / m ²
A composite nonwoven was obtained. This composite nonwoven fabric, a dot processing by the low-melting polyamide resin was carried several 335 dots / square inch, with coating weight 11g / m ^2, to obtain a interfacing a basis weight of 44 g / m ^2. The 5% modulus of the obtained adhesive interlining was 0.47 kg / 5 cm width, while the 10% modulus was 2.15 kg / 5 cm width, the 10% modulus / 5% modulus was 4.57, and the low elongation It was found that in the region, a small amount of force is required for elongation, and when elongation is increased, a large amount of force is required for stretching, and the shape retention is excellent. The physical properties of this adhesive interlining are as shown in Table 3.

[0022]

Table 3 Tate Yoko KES1 EMT 4.31 Unmeasurable KES2 EMT 6.88 16.50 B 0.25 0.10 G 2.36 2.21

Example 3 60% by weight of 6 nylon fibers (melting point 215 ° C.) having a fineness of 1.5 denier and a fiber length of 47 mm, and a fineness of 1.3 denier,
38 mm long polyester fiber (melting point 265 ° C) 4
A web composed of 0% by weight is partially heat-bonded in spots with an embossing roll at a temperature of 220 ° C. to give a basis weight of 20 g / m 2.
A heat-bonded nonwoven fabric of No. ² was produced. To this non-woven fabric, polyester processed yarn (latent crimped yarn) by 30 denier thread method is used by Russell knitting machine (RS3MSU of KARL MAYER).
-V) was used to carry out chain stitch knitting of 3.5 courses / cm, 18 gauge to produce a composite nonwoven fabric.
To this non-woven fabric, polyester course yarn (latent crimped yarn) by 30 denier yarn method is used using a Russell knitting machine (RS3MSU-V of Karlmeier Co., Ltd.) for 6 courses / c.
Denture stitch knitting of m and 18 gauge was performed to produce a composite nonwoven fabric. Using a tenter, this composite non-woven fabric is overheated at a temperature of 170 ° C. while applying about 12% overfeed.
Was heat-set to obtain 31 g / m ² composite non-woven fabric with loose (open) eyes of the denbi stitch knitting with the processed yarn. This composite nonwoven fabric, a dot processing by the low-melting polyamide resin was carried several 335 dots / square inch, with coating weight 11g / m ^2, to obtain a interfacing a basis weight of 42 g / m ^2. 5% modulus of the obtained adhesive interlining is 0.42k
g / 5cm width, while 10% modulus is 1.98kg
With a width of / 5 cm, the 10% modulus / 5% modulus is 4.71. It grows with a small force in the low elongation region, and when the elongation increases, a large force is required to stretch it, which leads to shape retention. I found it to be excellent.

[0024]

EFFECT OF THE INVENTION 10% modulus / 5% of the invention of this application
A composite non-woven fabric with a modulus ratio of 3 or more can be stretched with a small force in the low modulus region by allowing the warp knitting of the yarn expressing the latent crimp to be loose, so that it can be stretched with a small force. You can follow the movement of. On the other hand, in the high modulus region, a large force is required for stretching, so that the form can be stabilized. In particular, the composite nonwoven fabric of the invention of the present application is
It is possible to give unprecedented elongation characteristics that are excellent in conformability to fabric and shape retention. Such an effect cannot be obtained when a normal filament having no latent crimping property is used. Further, according to the invention of this application, the texture,
A composite non-woven fabric having excellent surface smoothness and stretchability can be obtained, and since the stretchable effect is particularly large, it is excellent in moldability and shape retention. Further, the composite non-woven fabric, since it is possible to freely control the stretchability by appropriately designing the conditions such as overfeed at the time of heat setting, it is possible to easily fabricate one that suits the purpose, not only at the manufacturer stage, A composite non-woven fabric having the characteristics desired by the user can be obtained even at the processing stage of the user. The non-woven fabric of the invention of this application is suitable as an interlining material, has a high drape property, and can be an interlining material having a high followability in a low elongation region, and it is said that the knitting yarn provides high strength and excellent surface abrasion resistance. Excellent effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a composite nonwoven fabric of the present invention.

FIG. 2 is an enlarged view of the structure of the chain stitch knitting viewed from the vertical cross-sectional direction of the composite nonwoven fabric.

FIG. 3 is an explanatory view showing a state in which a non-woven fabric is subjected to a vertical knitting structure by chain stitching.

[Explanation of symbols]

 1 Non-woven fabric 2 Latent crimped yarn 3 Latent latent crimped yarn

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Matsui 1128 Katsube Town, Moriyama City, Shiga Prefecture

Claims (5)

[Claims] 1. A composite non-woven fabric comprising a non-woven fabric and a yarn, which has a 10% modulus / 5% modulus ratio of 3 or more. 2. The composite non-woven fabric according to claim 1, characterized in that the non-woven fabric is warp-knitted with crimped yarns, and the warp knitting has looseness. 3. The composite non-woven fabric according to claim 1, wherein the composite non-woven fabric is loosened in the stitches of the warp knit by heat-setting in a state of overfeeding. 4. A method for producing a stretchable composite non-woven fabric, which comprises warp-knitting a latent crimped yarn to a non-woven fabric, heat-setting it in a state of overfeeding, and developing crimp of the latent crimped yarn. . 5. An interlining comprising the composite nonwoven fabric according to claim 1.