WO2001036731A1

WO2001036731A1 - Non-woven fabric comprising long fiber

Info

Publication number: WO2001036731A1
Application number: PCT/JP2000/008117
Authority: WO
Inventors: Masataka Adachi
Original assignee: Toyo Boseki Kabushiki Kaisha
Priority date: 1999-11-16
Filing date: 2000-11-16
Publication date: 2001-05-25
Also published as: JP2001146671A

Abstract

A long fiber non-woven fabric, characterized in that it comprises long fibers having a fineness of 0.5 to 6 dtex and has a METSUKE of 10 to 50 g/m2 and that it has an average flexural rigidity of 0.3 x 10?-3 N cm2¿/cm or less and an average bending recovery of 2 cm-1 or less in KES-FB system, and/or an average shear rigidity of 0.07 N/cm degree and an average shear recovery of 3 degree-1 or less.

Description

Description Long-fiber nonwovens Technical field

TECHNICAL FIELD The present invention relates to a long-fiber nonwoven fabric which is excellent in flexibility and shape recovery properties, and is also excellent in strikeback properties and suitable for a clothing member. Background art

Conventionally, spunbonded nonwoven fabrics, which are typical examples of long-fiber nonwoven fabrics, generally have the drawback that they have a hard texture and lack flexibility, and their use in industrial applications has been limited. In particular, when used in interlining applications for the purpose of retaining the shape of clothes, problems such as lack of ability to follow the dress material, impairment of natural wearing feeling, and tendency to wrinkle occur. . Moreover, the interlining such as this, because it basis weight has been used is of about ^{1 5~ 4 0 g Z m 2} , which satisfies the following property and shape retention of the outer material, for example, 1 2 Interlinings of about ²⁰ to 35 g Zm ² have been preferred for a surface weight of about 0 g Z m ² . However, to ensure the free movement of the garment wearer, for example, to 1 0 0 g Z m ² about sheer Outer are frequently used, along with this, interlining also thin cloth of requests increases There is a tendency. Therefore, among the above-mentioned interlinings, when a long-fiber nonwoven fabric, which is particularly advantageous in terms of cost, is used, there is a problem that the ability to follow the surface material is insufficient and the shape retention is reduced due to a low basis weight.

Furthermore, as the interlining becomes thinner, there is a problem in that the adhesive is eroded when trying to bond the outer material and the interlining.

As a means for solving such a problem, a method of changing a pattern of an embossing roll used for thermocompression bonding has been adopted. Specifically By changing the crimping area, the distance between the crimping points, the arrangement of the crimping points, or the shape of the crimping points, various measures have been taken to prevent the long-fiber nonwoven fabric from becoming hard and to prevent the adhesive from slipping through. Also, in terms of processing conditions, various measures have been taken, such as crimping temperature, crimping force, crimping time, and the presence or absence of preheating. However, these methods do not provide a soft texture, and when trying to obtain a long-fiber nonwoven fabric with a predetermined texture, it is necessary to have an embossing roll as required and replace it as necessary. There is a disadvantage that such waste is inevitable.

Next, as a method of softening the texture by secondary processing, force fitting processing, warp punching, or 21 dollar punching can be cited. According to the cam fitting process, a soft long-fiber nonwoven fabric with a good texture can be obtained, but it has the disadvantage of requiring dedicated equipment, and the problem of requiring multiple units in balance of production capacity with the previous process. is there. The same can be said for the war-Yuichi punching. In the needle punching process, for example, if the method disclosed in Japanese Patent Application Laid-Open No. Hei 8-91858 is used, the texture is improved as compared with the conventional method, but the flexibility is not sufficient for interlining. Disclosure of the invention

The present invention has been made in order to solve the above problems, and provides a long-fiber nonwoven fabric which is excellent in flexibility and shape recovery properties, and which is suitable for a clothing member excellent in strikeback properties. As an issue.

Therefore, the present invention is a nonwoven fabric composed of long fibers having a fineness of 0.5 to 6 decitex, and having an average bending rigidity of 0.3 X 10 — ³ N · cm ² Z cm in the KES_FB system. Below, and the average value of bending return is 2 cm— ¹ or less, or the average value of Z and shear stiffness is 0.07 NZ cm · degree or less, and the average value of 3 Degree- ¹ or less, a basis weight provides a long textiles nonwoven fabric is 1 0~ 5 0 gZm ^2.

The long-fiber nonwoven fabric of the present invention is excellent in flexibility and shape recovery properties, and also excellent in strike-back properties, and thus is suitable as a clothing member, particularly for interlining. BEST MODE FOR CARRYING OUT THE INVENTION

The nonwoven fabric of the present invention is composed of long fibers having a fineness of 0.5 to 6 decitex, so-called filaments. If the fineness is less than 0.5 decitex, a soft nonwoven fabric with a good texture can be obtained, but thread breakage during spinning is large, operation is inferior, and fiber cutting occurs during secondary processing such as needle punching. It is not preferable because it frequently occurs and the sheet strength is significantly reduced. On the other hand, when the fineness exceeds 6 decitex, the texture becomes harder, and the maximum pore size of the nonwoven fabric becomes larger, so that the adhesive easily slips through. For these reasons, the fineness is more preferably in the range of 0.5 to 3 dtex.

Next, especially when used for interlining, the average value of the bending stiffness of the long-fiber nonwoven fabric in the KES-FB system must be 0.3 X 10 to satisfy the ability to follow the surface material or maintain the shape. — ³ N · cm ² cm or less, and the average value of the bending return property is preferably 2 cm- ′ or less. Yo Ri is preferably bent in the average value of the rigidity ^{0. 2 X 1 0- 3 N ·} cm V cm or less, and the average value of bending back property is less than 2 c mi. The average value of the flexural rigidity is greater than ^{0. 3 X 1 0- 3 N ·} cm 2 Z cm when lack texture is hard connexion flexibility, conformability to outer material is deteriorated. On the other hand, when the average value of the reversion property exceeds 2 cm " ¹ , the shape recovery is poor, and the shape retention on the surface material is poor.

In addition, the shear rigidity of long-fiber nonwoven fabric in the KES-FB system It is preferable that the average value of the resilience is 0.07 NZ cm'degree or less and the average value of the resilience is 3 degrees or less. More preferably, the average value of the shear stiffness is 0.07 NZcm · degree or less, and the average value of the shear resilience is 3 degree- ¹ or less. If the average value of the shear stiffness is larger than 0.07 N / cm * degree, as in the case of the average value of the bending stiffness, the ability to follow the surface material will be poor, and the average value of the shear return property will exceed 3 degree ¹ The shape recovery is poor and the shape retention on the surface material is poor.

The basis weight of the long-fiber nonwoven fabric is preferably from 10 to 50 g Zm ² . For bales with a basis weight of less than 10 g Zm ² , relatively soft texture and high flexibility can be obtained, but it is difficult to evenly distribute the constituent fibers at the web manufacturing stage. It is not preferable because the adhesive may be eroded from the locally small area. On the other hand, 5 0 gZm ² a feeling physician hard exceeds, followability is poor undesirably to Outer.

Examples of the raw material of the long fiber include polyesters such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, low-melting-point polyester copolymerized with isofluric acid, polypropylene, and polypropylene. Polyolefins such as high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, di- or terpolymers of propylene with other polyolefins, and polyamides such as nylon 6 and nylon 66 Although thermoplastic resins such as compounds, a mixture thereof, and a copolymer can be used, polytrimethylene terephthalate or polybutylene terephthalate is preferred from the viewpoint of softening the texture. However, there is no particular limitation as long as it has a fiber form function and can give a soft texture. Also, it is not limited to single-component long-fiber nonwoven fabrics, but multi-components such as sheath-core type, eccentric sheath-core type, side-by-side type, and sea-island type It may be a system.

The maximum pore size of the long-fiber nonwoven fabric is preferably 500 tm or less. More preferably, it is 450 mz or less. The maximum pore size is important as a substitute measure for measuring the penetration of the adhesive, and if it exceeds 50,000 m, the adhesive may pass through, which is not preferable.

Here, the production method of the present invention will be described, but is not limited thereto. First, the thermoplastic resin described above was melt-spun from a spinning nozzle with a large number of holes, and a number of continuous filament groups formed were thinned and stretched by air jet or the like or between rollers with different rotation speeds. Later, they are collected on a moving net. The resulting © Ebb and thermocompression bonding a plurality of Enpo Suroru or flat trawl heated to near the melting point of the thermoplastic resin, basis weight to produce a 1 0 to 5 0 g long-fiber nonwoven fabric of Z m ² . Adjust the single hole discharge amount or stretch ratio so that the filament fineness is 0.5 to 6 dtex.

The texture of the long-fiber nonwoven fabric can be slightly improved by devising the embossing roll pattern and thermocompression conditions, but generally the texture is hard and lacks flexibility. Thus, in the present invention, a highly flexible long-fiber nonwoven fabric can be produced by melt-spinning polytrimethylene terephthalate or polybutylene terephthalate, which is a soft polymer. Further, in performing the twenty-one Dorupanchi processed by the long use of a felt needle of the needle count is 1 5-4 5 against fibrous nonwoven fabric, the number punch 3 0-1 5 0 times Z cm ² Conditions In addition, it is possible to produce a long-fiber nonwoven fabric having excellent flexibility.

Needle punching for the purpose of imparting flexibility used in the present invention is performed by mechanically entanglement of the fibers constituting the long-fiber nonwoven fabric with a felt needle, as in ordinary needle punching, and the mechanical properties of the long-fiber nonwoven fabric Break The purpose is not to improve, but by passing a specific felt needle through the thermocompression bonding portion of the long-fiber nonwoven fabric or the weak thermocompression bonding portion for temporary bonding, the tissue is partially destroyed and the degree of freedom of the constituent fibers is reduced. It enhances and gives flexibility.

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited thereto. The evaluation method used in the examples and comparative examples of the present invention was as follows.

(1) Weight [gZm ² ]

It was measured in accordance with 5.2 of JIS L1085.

(2) Thickness [mm]

Measured according to JIS L 1 0 8 5

(3) Tensile strength [NZ 5 cm]

The measurement was performed in accordance with 54 of JISL1085.

[0 0 2 3]

(4) Bending stiffness [N · cmV cm] and bending return [cm "'] The bending stiffness and bending hysteresis in the vertical and horizontal directions were measured using KES_FB2 manufactured by Kato Tech Co., Ltd. The average value of bending stiffness and bending return was calculated by the formula.

Bending return in each direction = (Bending hysteresis in each direction) Z (Bending rigidity in each direction)

Average value = {(average value in vertical direction) + (average value in horizontal direction)} / 2 (5) Shear stiffness [NZ cm 'd e g r e e] and shear return property [d e g r e e "']

Shear rigidity in the longitudinal and transverse directions and shear hysteresis at a shear angle of 0.5 ° were measured using KES-FB1 manufactured by Kato Tech Co., Ltd. I did. Shear return in each direction = (shear hysteresis at 0.5 ° shear angle in each direction) Z (shear rigidity in each direction)

Average value = {(average value in vertical direction) + (average value in horizontal direction)} / 2

(6) Maximum hole diameter

Using a Coulter porometer II, the measurement was performed according to ASTM F316-86.

(7) Tactile evaluation

Twenty measurers lightly gripped the sample cut into a 20 cm square, and evaluated the hardness. The evaluation criteria were as follows: 16 or more people felt soft if they felt soft; 15 to 11 people felt soft if they felt soft; and 10 or less felt soft The case was rated as hard. Examples 1 to 3, Comparative Example 1

Spunbond method (e.g., JP-B-5 3 3 2424 JP) Ri by the fineness is 2. basis weight of polyethylene terephthalate evening rate fiber 2 decitex 1 5, 2 0, 3 0, of 6 0 GZm ² A spunbond nonwoven fabric web was produced and then thermocompression bonded using a 230 embossing roll at a linear pressure of 5888 NZ cm to produce a long fiber nonwoven fabric. Next, the nonwoven fabric was subjected to needle punching with a punch number of 85 times Zcm ² using a 20th-count conical felt needle manufactured by Grotzbeckert. The physical properties are shown in Tables 1 and 2.

From Table 1, all of the nonwoven fabrics of Examples 1 to 3 were excellent in flexibility, shape recovery property, and strikeback property, and were suitable for interlining. Comparative Example 1 was out of the scope of the present invention except for the maximum pore diameter, and was inferior in flexibility and shape recovery.

Example 4

The spunbond method, fineness 2. 2 decitex poly trimethylene Chirenterefu evening consists rate fiber basis weight of 2 0 g / m ² Supanbo A nonwoven fabric web was manufactured, and then thermocompression-bonded at a linear pressure of 490 cm using an embossing opening at 190 ° C to manufacture a long-fiber nonwoven fabric. The physical properties are shown in Table 1.

As shown in Table 1, the long-fiber nonwoven fabric of Example 4 was excellent in flexibility, shape recovery property, and strikeback property, and was suitable for use as an interlining.

Comparative Examples 2 and 3

The spunbond method, fineness basis weight of polyethylene Te Refutare Ichito fibers 2 dtex are produced the 2 0, 3 0 g Z m 2 spunbond nonwoven web, and then using the embossing roll 2 3 0 ° C Thermocompression bonding was performed at a linear pressure of 5888 NZ cm to produce a long-fiber nonwoven fabric. Table 2 shows the physical properties.

From Table 2, Comparative Examples 2 and 3 were high in flexural rigidity and shear rigidity and inferior in flexibility.

Comparative Example 4

The spunbond method, fineness is the basis weight of polyethylene Te Refutare Ichito fibers 2 dtex manufactured 1 5 g Z m ² spunbond nonwoven fabric web and then using the embossing roll 2 3 0 ° C line Thermocompression bonding was performed at a pressure of 588 cm to produce a long-fiber nonwoven fabric. Next, the nonwoven fabric was needle-punched with a punch number of 65 times at Z cm ² using a No. 36 felt needle manufactured by Organ. Table 2 shows the physical properties.

As can be seen from Table 2, Comparative Example 4 was excellent in flexibility and shape recovery, but was inferior in strikeback properties especially for interlining, and was not preferred. table 1

O

-¾ PET: E. Ethylene terephthalate, PTT: e. Ritrimethylene terephthalate

Table 2

〇

* PET: E. Ethylene terephthalate, PTT: e. Ritrimethylene phthalate

Industrial applicability

As described above, according to the present invention, it is possible to provide a long-fiber nonwoven fabric that is excellent in flexibility and shape recovery properties, and is also excellent in strikeback properties and suitable for a clothing member. Therefore, the long-fiber nonwoven fabric of the present invention is particularly suitably used for interlining and hook-and-loop fastener because it has excellent followability to the dress material and shape retention.

Claims

The scope of the claims

1. fineness shall apply in nonwoven fabric made of long fibers of 0.5 to 6 dtex, the average value of the flexural rigidity of KES _ FB system 0. 3 X 1 0 In one ^{3 Ν} · cm ² cm or less, and bending back The average value of the elasticity is 2 cm- ¹ or less, or the average value of Z and shear stiffness is 0.07 NZcm * degree or less, the average value of the brackish return property is 3 degree or less, and the basis weight is 10 to 5 0 gZm ² long textiles nonwoven fabric, characterized in that.

3. The long-fiber nonwoven fabric according to claim 1, wherein the fineness is 0.5 to 6 decitex, and the maximum pore size of the nonwoven fabric is 500 // m or less.

3. The long-fiber nonwoven fabric according to claim 1, wherein the long fiber is polytrimethylene terephthalate or polybutylene terephthalate.

4. The long-fiber nonwoven fabric according to any one of claims 1 to 3, wherein the nonwoven fabric is thermocompressed and subjected to needle punching to have excellent flexibility.

5. The long-fiber nonwoven fabric according to any one of claims 1 to 4, which is used for interlining or hook-and-loop fastener.