JP3278288B2 - Entangled nonwoven fabric and interlining using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entangled nonwoven fabric and an adhesive interlining using the same.

[0002]

2. Description of the Related Art Conventionally, non-woven fabrics entangled by the action of needles or water streams have been used for various purposes.
At present, an entangled nonwoven fabric having sufficient physical properties has not been provided.

For example, when such an entangled nonwoven fabric is used for interlining of clothing, if the entanglement is weak, the abrasion resistance is poor.
Moreover, since there is no rebound, there is a problem that clothes are easily out of shape. Therefore, in order to strengthen the entanglement, it has been considered to form an entangled nonwoven fabric by using fibers that can be split by a water flow or the like. It was not possible to obtain an entangled nonwoven fabric excellent in the above.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has an entangled nonwoven fabric suitable for various uses. It is an object of the present invention to provide an entangled nonwoven fabric excellent in abrasion and rebound, and an adhesive interlining using the same.

[0005]

Means for Solving the Problems The entangled nonwoven fabric of the present invention comprises:
Consisting of a fiber web containing cellulose fibers obtained by the solvent extraction method, and subjecting the fiber web to entanglement treatment
As a result, a part of the cellulose fiber is branched and entangled at the same time , and the degree of branching on the front and back surfaces of the fiber web is different.

If the surface of the cellulose fiber having a high degree of branching has a degree of branching twice or more that of the surface having a low degree of branching, the physical properties of the front and back surfaces are further different, and the cellulose fiber can be adapted to various uses. .

Further, the cellulose fibers on the surface having a large degree of branching have 3 to 60 fibers / 50 μm branched fibrils, or the diameter of the fibrils branched from the cellulose fibers on the surface having a large degree of branching is 0.1 mm. Two
When it is 2 μm, the entangled nonwoven fabric is excellent in strength without lowering the strength of the cellulose fiber obtained by the solvent extraction method.

[0008] Further, the cellulose fiber is 20 to 90% by weight
When it is contained, it is an entangled nonwoven fabric excellent in abrasion resistance and rebound.

[0009] The adhesive interlining of the present invention is obtained by adhering an adhesive resin to at least one surface of the entangled nonwoven fabric.

[0010]

[Action] entangled nonwoven fabric of the present invention, cellulose fibers obtained by the solvent extraction method (hereinafter, simply referred to as "cellulose fibers") a fiber web comprising, the fibers c
By performing the entanglement treatment on the eb, a part of the cellulose fiber is branched and entangled at the same time , and
Since the degree of branching of the cellulose fibers is different between the front and back surfaces of the entangled nonwoven fabric, it can be used for various applications. For example, if this entangled non-woven fabric is used for a filter, the fiber density on one side is higher than the fiber density on the other side and has a density gradient, so that coarse dust is collected on the surface with a low fiber density. Since fine dust can be collected on a surface having a high fiber density, an entangled nonwoven fabric having a high collection efficiency can be obtained. In addition, when this entangled nonwoven fabric is used for a wiper, coarse dirt can be wiped off on a surface having a low fiber density, and fine dirt can be wiped off on a surface having a high fiber density. It becomes an entangled nonwoven fabric. Further, the entangled nonwoven fabric of the present invention can be used for clothing interlining applications, and this application will be described in detail below as an example.

Since the entangled nonwoven fabric of the present invention contains cellulose fibers obtained by a solvent extraction method, it is excellent in repulsion and can be entangled with a fiber web.
Ri because some of the cellulose fibers are entangled branched Then simultaneously, excellent in strength and abrasion resistance, further, the front and back surfaces of the entangled nonwoven fabric, since the branching degree of the cellulose fibers are different, the branch degree The entangled nonwoven fabric can be made to have tension on a small surface.

This cellulose fiber is obtained by a solvent extraction method, and is superior in strength and rebound as compared with viscose rayon fiber which is one of the cellulose fibers. In addition, since the cellulose fibers are partially branched by external force such as a needle or a water flow described later and the branched fibrils can be entangled with each other, an entangled nonwoven fabric having excellent strength and abrasion resistance is formed. can do. This cellulose fiber is, for example, sold under the trademark TENCEL by Coatles and can be easily obtained.

This cellulose fiber is contained in an entangled nonwoven fabric in an amount of 20%.
The content is preferably 90 to 90% by weight, and when the content is less than 20% by weight, the entanglement is weak in spite of using the cellulose fiber, so that the abrasion resistance and repulsion are poor. If it exceeds 90% by weight, it is too hard. More preferably, it is 30 to 80% by weight.

Fibers other than the cellulose fiber include:
When the entangled nonwoven fabric is used for clothing interlining, in order to impart flexibility, nylon 6, nylon 66, nylon 610, nylon 11, nylon 12, copolymerized nylon, or some of these nylons may be sulfone. Nylon fibers made of a modified nylon or the like bonded with a compound containing a group, or copolymerized to provide dimensional stability, such as polyethylene terephthalate, polybutylene terephthalate, and a resin component such as 5-sulfoxyisophthalic acid. Polyester fibers made of a modified sulfonated aromatic dicarboxylic acid or a modified polyester copolymerized with a salt thereof can be suitably used. Among these, a nylon fiber composed of a modified nylon in which a compound containing a sulfone group is bonded to a part of nylon or copolymerized, or a polyester fiber composed of a modified polyester in which a sulfonated aromatic dicarboxylic acid or a salt thereof is copolymerized Is more suitable for use because it has excellent dyeability.

When used for purposes other than clothing interlining, cellulose-based regenerated fibers and semi-synthetic fibers, polyvinyl alcohol-based fibers, and the like may be used depending on the physical properties required for the purpose.
Synthetic fibers such as polyvinyl chloride, polyvinylidene chloride, polyacrylonitrile, polyethylene, polypropylene, and polyurethane, inorganic fibers such as glass and carbon fibers, plant fibers such as cotton and hemp, wool and silk, etc. Mineral fibers such as animal fibers and asbestos can be used.

These fibers do not need to be composed of a single component. For example, the fibers have a concentric or eccentric core-in-sheath type, a chrysanthemum type in which one component is divided by another component extending from the fiber axis, and a single component. Laminate type where two or more layers of component and other components are bonded together, sea-island type where one component is dispersed in other components, shrinkage,
Composite fibers having properties such as fusing properties or splitting properties can be used.

Among them, fibers having a core-in-sheath type or sea-island type cross-sectional shape can be suitably used because they have characteristics of each resin component. In particular, when used for clothing interlining applications, core-sheath or sea-island composite fibers composed of a nylon component and a polyester component are excellent in feeling and dimensional stability, and therefore can be suitably used.

Further, it has a cross section of a chrysanthemum flower type or a laminated type,
The composite fiber that can be mechanically divided can be suitably used because it can be divided to form a fiber having a small diameter, so that it can be more easily entangled, is excellent in strength, and is excellent in feeling. Examples of the combination of the resin components of the dividable composite fiber include a polyamide resin and a polyester resin, a polyamide resin and a polyolefin resin, a polyamide resin and a polyacrylonitrile polymer resin, and a polyester resin and a polyolefin resin. And polyester-based resins and polyacrylonitrile-based resins, and polyolefin-based resins and polyacrylonitrile-based resins. Among these, a combination of a polyamide-based resin and a polyester-based resin can be suitably used because of its excellent thermal stability.

As described above, the fineness of the cellulose fibers and other fibers constituting the entangled nonwoven fabric of the present invention (including the fineness of the splittable conjugate fiber after splitting) is preferably 0.01 to 3 denier. Preferably, especially when used for clothing interlining applications, fibers having a denier of 0.01 denier or more are preferable so as not to lower the strength of the interlining, and 2 deniers or less so that the flexibility is not impaired. preferable. In addition, the fiber length is not particularly limited, but the fibers are easily entangled,
The thickness is preferably 3 to 100 mm so that unevenness does not occur in the entangled nonwoven fabric.

The fiber web is formed from the fibers as described above. The method for forming the fiber web may be a dry method such as a card method or an air lay method, or a wet method. According to the former dry method, a relatively bulky and flexible fiber web can be formed, and according to the latter wet method, a dense and uniform fiber web can be obtained. good.

When the fiber web is formed by the card method, the fibers can be oriented in one direction, crosswise by a cross layer or the like in multiple directions, or these fiber webs can be appropriately laminated. . Among these, when fiber webs that are crossed and oriented in multiple directions are included, the strength in the transverse direction (in producing a long fiber web, the direction perpendicular to the flow direction of the fiber web) is also excellent. Since the difference in strength between the weft direction (the direction of flow of the fiber web) and the weft direction is small, it can be suitably used.

Furthermore, fiber webs having different fiber configurations may be laminated. In the present invention, the fiber web is formed by appropriately combining the fiber web forming method, the fiber orientation direction, and the fiber configuration of the fiber web. Can be.

The basis weight of the fiber web thus formed varies depending on the use, but when used for clothing interlining, the basis weight is preferably 10 to 60 g / m ² . 10g /
If it is less than m ² , the fiber web becomes extremely uneven and does not form a nonwoven fabric, and if it exceeds 60 g / m ² , flexibility is lost. More preferably 15 to 50 g / m ^2, and most preferably 20 to 40 g / m ^2.

In order to improve the handleability of the fiber web, a pre-treatment such as a needle punching treatment or a water flow (water pressure of 40 kg) was carried out so as not to affect the subsequent entanglement treatment.
/ cm ² or less).

Then, the needle density is set to 20 with respect to the fiber web.
By performing an entanglement treatment such as a needle punching treatment of about 100 / cm ² or a water flow treatment, a part of the cellulose fiber is branched and entangled at the same time, thereby obtaining the entangled nonwoven fabric of the present invention. Among them, the water flow treatment is a suitable entanglement method because it has excellent smoothness on the surface of the nonwoven fabric. Hereinafter, description will be given based on the water flow treatment.

The entangled nonwoven fabric of the present invention can be adapted to various uses by providing a difference in the degree of branching between the front and back surfaces.
It is necessary to change the water flow treatment conditions depending on the front and back surfaces of the fiber web. For example, depending on the front and back surfaces of the fiber web, the support used for the water entanglement process is changed, the nozzle diameter for jetting water is changed, the nozzle pitch is changed, the jet pressure of water is changed, the jet angle of water is changed. And the number of treatments are changed. These methods can be used alone or in combination to obtain the entangled nonwoven fabric of the present invention. Among them, the method of changing the jet pressure of water or changing the number of treatments is simple in condition setting,
This is a preferred processing method.

The support that can be used for the water flow treatment may be a net or a perforated plate made of metal, plastic, or the like, and is not particularly limited. A flat woven net of 150 / inch is suitable, and in the case of a perforated plate, one having a distance between holes of 0.15 to 0.40 mm can be suitably used. The diameter of the nozzle for jetting water is preferably 0.05 to 0.3 mm, and the nozzle pitch is preferably 0.2 to 3.0 mm.

If the jet pressure of water is 50 to 300 kg / cm ² , a part of the cellulose fiber is branched and easily entangled. The jetting angle can be set within a range of 45 to 90 ° with respect to the fiber web so as not to disturb the fiber web. Can be done

The number of treatments with a water flow is not particularly limited, and may be about 3 to 10 times. When branching and entanglement on one side is hardly necessary, only one side may be subjected to a water flow treatment.

The entangled nonwoven fabric obtained by subjecting the entangled nonwoven fabric to a hydroentanglement treatment by appropriately combining the above methods has a cellulose branching degree twice as large as the cellulose branching degree in the surface having a small branching degree. It is preferable that it is above. If it is less than twice, there is no difference between the front and back surfaces of the entangled nonwoven fabric, and it is difficult to adapt it to various uses. For example, in the case of clothing interlining use, it is because it is not possible to impart abrasion resistance on a surface with a high degree of branching and to impart tension or repulsion on a surface with a low degree of branching. More preferably 2.
It is at least 5 times, most preferably at least 3 times.

In the present invention, the degree of branching refers to the number of branches of fibrils branched per 50 μm of cellulose fiber. The number of the branched fibrils can be counted from an electron micrograph of the entangled nonwoven fabric.

It is preferable that the cellulose fibers on the surface of the entangled nonwoven fabric of the present invention having a high degree of branching have branched fibrils of 3 to 60 fibers / 50 μm. 3 /
If it is less than 50 μm, the entanglement is weak and there is no abrasion resistance despite the use of cellulose fibers. If it exceeds 60 fibers / 50 μm, the fibers are branched and fibrillated too much. This is because the resilience deteriorates. More preferably, it is 5 to 50 lines / 50 μm, and most preferably, it is 10 to 45 lines / 50 μm.

The diameter of the fibrils branched from the cellulose fibers is 0.2 to 2 on the surface having a high degree of branching.
It is preferably μm. If the thickness is less than 0.2 μm, even if the fibers are branched and entangled, the fibrils are apt to be broken, so that the fibrils have no strength. If the thickness exceeds 2 μm, the entanglement becomes weak. More preferably, it is 0.3 to 1.5 μm, and most preferably, it is 0.5 to 1.2 μm. In addition, the diameter of the fibrils branched from the cellulose fibers can also be measured from an electron micrograph.

When the cross-sectional shape of the fibril branched from the cellulose fiber is not circular, it means the average value of the length of the longest part and the length of the shortest part in the cross-section of the fibril. For example, when the cross-sectional shape of the fibril is elliptical, the average value of the major axis and the minor axis is called the diameter of the fibril.

The entangled nonwoven fabric obtained as described above is
As described above, it can be used for various uses such as synthetic leather use and reinforcing material use other than filter use, wiper use, and clothing interlining use. When used for various purposes, it is not necessary to use the entangled nonwoven fabric alone, and various post-processing such as attaching an adhesive resin to adhere to another material or coating a film may be performed. . Hereinafter, the case where the entangled nonwoven fabric of the present invention is used for adhesive interlining will be described.

When an adhesive resin is applied to at least one surface of the entangled nonwoven fabric of the present invention to obtain an adhesive interlining, the adhesive resin may be applied to either the surface having a large degree of branching or the surface having a small degree of branching. I do not care. When the adhesive interlining is adhered to the outer material, a resin that does not substantially melt at the temperature at which the adhesive interlining is adhered (hereinafter, may be referred to as “non-melting resin”) is preliminarily so as not to cause upside down. It is more preferable that the adhesive resin is adhered on the non-molten resin after being adhered.

As the adhesive resin, for example, a polyethylene adhesive, a polyamide adhesive, a polyvinyl chloride adhesive, a polyester adhesive, and the like can be used. Among them, the polyamide adhesive resin has excellent adhesiveness to various outer materials. For,
It can be suitably used. On the other hand, as the non-molten resin, for example, a synthetic resin such as a self-crosslinking acrylate resin, a crosslinkable polyurethane resin, a crosslinkable silicone resin, a crosslinked nitrile rubber, and a modified product thereof can be used. A crosslinked acrylic ester resin can be suitably used because of its excellent flexibility.

Such an adhesive resin or non-molten resin can be made into a paste, for example, and then attached using a screen or a gravure roll. The shape of the resin adhered in this way is not particularly limited, but the surface area of the entangled non-woven fabric (the surface of the entangled non-woven fabric is made smooth so as not to impair the adhesiveness and flexibility of the adhesive interlining. 10 to 150 pieces / cm ² , and the total weight of the resin (including the adhesive resin in the case of non-molten resin) is 4 to 40 g / cm ²
preferably a m ^2.

When a non-molten resin is adhered,
Synchronize with a screen or gravure roll to attach the non-molten resin, attach the adhesive resin on the non-molten resin,
After spraying the powdery adhesive resin on the non-molten resin, the excess adhesive resin is removed by air or mechanical means such as, for example, a bar-shaped beaten object, and the adhesive resin is adhered only on the non-molten resin. If this is done, unexpected adhesion will not occur, and this is a more preferable method of attaching the adhesive resin.

Examples of the present invention will be described below, but the present invention is not limited to the following examples. The degree of branching and the diameter of the branched fibrils are values measured by an electron microscope photograph magnified 2,000 times, and are values obtained by rounding the average value of five places.

[0041]

EXAMPLES Example 1 60% by weight of cellulose fiber (1.5 denier fineness, fiber length 38 mm, trademark: Tencel, manufactured by Coatles Co.) and polyester fiber made of polyethylene terephthalate resin (1.2 denier fineness, fiber (38 mm in length) and 40% by weight, and a unidirectional fiber web obtained by the carding method and a fiber web obtained by crossing the orientation direction of the fibers with a cross layer by 30:70. To obtain a laminated fiber web having a basis weight of 27 g / m ² .

The laminated fiber web was placed on a 100-mesh plain weave net, and the nozzle diameter was 0.13 mm, the nozzle pitch was 0.6 mm, the ejection pressure was 60 kg / cm ² , and the ejection angle was 90 °.
After processing once from one side (side A) of the laminated fiber web and changing twice only the ejection pressure to 80 kg / cm ² , only the ejection pressure of 60 kg is applied to the opposite side (side B) of the laminated fiber web. / c
Change in m ² was treated once, basis weight 27 g / m ^2, a thickness of 0.27m
m entangled nonwoven fabric was obtained. In the entangled nonwoven fabric, the degree of branching on the side A (the side with a large degree of division) is 20 lines / 50 μm, the diameter of the branched fibrils is 0.5 μm, and the degree of branching on the side B (the side with a small degree of division) is 8 lines / 50 μm. The diameter of the branched fibrils was 0.5 μm.

After the entangled nonwoven fabric was subjected to a silicone finishing treatment, a screen having a random pattern of 37 dots / cm ² and a diameter of 0.7 mm was used, and the melting point was 105 to 135.
A paste containing a thermo-adhesive polyamide resin at a temperature of 0 ° C. is attached in dot form to the surface B of the entangled nonwoven fabric, and then heat-treated at 110 ° C. for 1 minute to obtain an adhesive interlining with an adhesive resin amount of 10 g / m ^2. Was.

(Example 2) The laminated fiber web obtained in the same manner as in Example 1 was treated once with an ejection pressure of 60 kg / cm ^{2, and} was treated twice with only the ejection pressure changed to 80 kg / cm ² . Thereafter, the opposite surface (B surface) of the laminated fiber web is
An entangled non-woven fabric having a basis weight of 27 g / m ² and a thickness of 0.26 mm was obtained in the same manner as in Example 1, except that the treatment was performed once with the change to kg / cm ² . In the entangled nonwoven fabric, the degree of branching on the side A (the side with a large degree of division) is 24 lines / 50 μm, the diameter of the branched fibrils is 0.5 μm, and the degree of branching on the side B (the side with a small degree of division) is 11 lines / 50 μm. 0.5 μm diameter of branched fibrils
Met. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

(Example 3) The laminated fiber web obtained in the same manner as in Example 1 was treated once with an ejection pressure of 60 kg / cm ^{2, and} was treated twice with only the ejection pressure changed to 70 kg / cm ² . Then, only the ejection pressure is increased to 60 on the opposite surface (B surface) of the laminated fiber web.
An entangled nonwoven fabric having a basis weight of 25 g / m ² and a thickness of 0.25 mm was obtained in the same manner as in Example 1 except that the treatment was carried out once while changing to kg / cm ² . In the entangled nonwoven fabric, the degree of branching on the surface A (the surface with a large degree of division) is 10/50 μm, the diameter of the branched fibrils is 0.6 μm, and the degree of branching on the surface B (the surface with a small degree of division) is 3/50 μm. The diameter of the branched fibrils was 0.6 μm. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

Example 4 Cellulose fiber (1.5 fineness)
80% by weight of denier, fiber length 38 mm, trademark: Tencel, manufactured by Coatles Co., Ltd.) and 20% by weight of polyester fiber (fineness 1.2 denier, fiber length 38 mm) made of polyethylene terephthalate resin were mixed and obtained by a card method. A unidirectional fiber web and a fiber web in which the orientation directions of the fibers are crossed by a cross layer with the unidirectional fiber web are laminated at a weight ratio of 30:70, and a basis weight of 35 g /
An m ² laminated fiber web was obtained.

A jet pressure of 60 kg / cm ^{2 was} applied to the laminated fiber web.
After processing once, changing only the ejection pressure to 120 kg / cm ² and processing three times, the opposite side (B side) of the laminated fiber web is
The same procedure as in Example 1 was repeated except that the ejection pressure was changed to 80 kg / cm ² and the treatment was performed twice, and the basis weight was 35 g / m ² and the thickness was 0.40 m.
m entangled nonwoven fabric was obtained. In the entangled nonwoven fabric, the degree of branching on the side A (the side with a large degree of division) is 45 lines / 50 μm, the diameter of the branched fibrils is 0.40 μm, and the degree of branching on the side B (the side with a small degree of division) is 20 lines / 50 μm. The diameter of the branched fibrils was 0.40 μm. Thereafter, an adhesive interlining was obtained in the same manner as in Example 1.

(Example 5) The laminated fiber web obtained in the same manner as in Example 4 was treated once with an ejection pressure of 60 kg / cm ² , and was treated four times with only the ejection pressure changed to 160 kg / cm ² . rear,
On the opposite side (B side) of the laminated fiber web,
An entangled nonwoven fabric having a basis weight of 35 g / m ² and a thickness of 0.38 mm was obtained in the same manner as in Example 1 except that the treatment was performed twice while changing to 0 kg / cm ² . In the entangled nonwoven fabric, the degree of branching on the side A (the side with a large degree of division) is 50 lines / 50 μm, the diameter of the branched fibrils is 0.3 μm, and the degree of branching on the side B (the side with a small degree of division) is 26 lines / 50 μm. 0.3μ diameter of branched fibrils
m. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

(Example 6) The laminated fiber web obtained in the same manner as in Example 1 was treated once with an ejection pressure of 40 kg / cm ² , and was treated four times with only the ejection pressure changed to 60 kg / cm ² . Then, only the ejection pressure is increased by 50 on the opposite surface (B surface) of the laminated fiber web.
An entangled nonwoven fabric having a basis weight of 27 g / m ² and a thickness of 0.29 mm was obtained in the same manner as in Example 1 except that the treatment was carried out twice while changing to kg / cm ² . The degree of branching on the side A (the surface with a high degree of division) of this entangled nonwoven fabric is 5/50 μm, and the diameter of the branched fibrils is 1.
At 4 μm, the degree of branching of the B surface (the surface with a small degree of division) is 1
Book / 50 μm, and the diameter of the branched fibrils was 1.8 μm. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

(Examples 7 and 8) Except that the content of the cellulose fiber was changed to 40 and 80 (in order, in Examples 7 and 8) by weight (in order, the amount of polyester fiber was 60 and 20% by weight), In the same manner as in Example 1, a laminated fiber web having a basis weight of 27 g / m ² was obtained. An adhesive interlining was obtained from this laminated fiber web in exactly the same manner as in Example 1. The degree of branching of these entangled nonwoven fabrics and the diameter of the fibrils were as shown in Table 1.

[0051]

[Table 1]

Comparative Example 1 An entangled nonwoven fabric having a basis weight of 27 g / m ² and a thickness of 0.26 mm was obtained in exactly the same manner as in Example 1 except that viscose rayon fiber was used instead of the cellulose fiber. . The viscose rayon fiber of this entangled nonwoven fabric did not form branched fibrils. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

(Comparative Example 2) The laminated fiber web obtained in the same manner as in Example 1 was treated once with an ejection pressure of 30 kg / cm ² , and treated three times while changing only the ejection pressure to 40 kg / cm ² . After that, the opposite surface (B surface) of the laminated fiber web is
An entangled nonwoven fabric having a basis weight of 27 g / m ² and a thickness of 0.28 mm was obtained in the same manner as in Example 1, except that the treatment was performed once with the change to kg / cm ² . None of the surfaces of the entangled nonwoven fabric formed branched fibrils. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

(Comparative Example 3) The laminated fiber web obtained in the same manner as in Example 1 was treated once at a jetting pressure of 20 kg / cm ² , and the opposite surface (side B) of the laminated fiber web was subjected to only the jetting pressure. Was changed to 80 kg / cm ² and treated twice, and then the surface A of the laminated fiber web was treated twice except for changing only the ejection pressure to 80 kg / cm ² , in the same manner as in Example 1. 27g / weight
An entangled nonwoven fabric having an m ² and a thickness of 0.26 mm was obtained. The degree of branching on both sides A and B of the entangled nonwoven fabric was 26 lines / 50 μm, and the diameter of the branched fibrils was 0.5 μm. Thereafter, in the same manner as in Example 1, an adhesive interlining was obtained.

(Abrasion resistance test) The adhesive interlining of Examples 1 to 8 and Comparative examples 1 to 3 cut into 25 × 25 (cm) and a surface material (tropical: polyester / wool = 55/45) were used. 140 ° C, pressure 3 by roller press
The treatment was carried out for 10 seconds at kg / cm to bond and integrate. This integrated product is dry-cleaned with a commercial Parkren dry cleaner (Park Dry Cleaner, manufactured by Sanyo Corporation) under the conditions of pre-washing for 1 minute, main washing for 6 minutes, dehydration for 1 minute, and drying for 20 minutes. Was repeated three times, the surface condition of the adhesive interlining was observed, and evaluated according to the standard specified in JIS L-1076. The results are shown in Table 1.

(Resilience test) The adhesive interlinings of Examples 1 to 8 and Comparative Examples 1 to 3 cut to 25 × 25 (cm) and a surface material (tropical, wool 100%) were used as a roller press. , At a temperature of 140 ° C. and a pressure of 3 kg / cm for 10 seconds to integrate the adhesive. This bonded and integrated thing,
1cm pure bending tester between chucks (Kato Tech Co., Ltd.)
And KES-FB2) and bend to a curvature of 2.5 cm, and then bend in the opposite direction to a curvature of 2.5 cm. The bending stiffness is determined from the change in bending moment per unit width with respect to the change in curvature from 0.5 cm to 1.5 cm. The bending stiffness was also measured in the vertical and horizontal directions of the entangled nonwoven fabric. The results are also shown in Table 1.

[0057]

The entangled nonwoven fabric of the present invention comprises a fiber web containing cellulose fibers obtained by a solvent extraction method,
By performing the entanglement treatment on the fiber web, a part of the cellulose fiber is branched and entangled at the same time , and the degree of branching on the front and back surfaces of the fiber web is different. In particular, if the surface of the cellulose fiber having a high degree of branching has a degree of branching that is twice or more that of the surface having a low degree of branching, the physical properties of the front and back surfaces are further different, and it can be adapted to various uses.

Further, the cellulose fibers on the surface having a high degree of branching have 3 to 60 fibers / 50 μm branched fibrils, or the diameter of the fibrils branched from the cellulose fibers on the surface having a high degree of branching is 0.1 mm. Two
When it is 2 μm, the entangled nonwoven fabric is excellent in strength without lowering the strength of the cellulose fiber obtained by the solvent extraction method.

Further, the cellulose fiber is 20 to 90% by weight.
When it is contained, it is an entangled nonwoven fabric excellent in abrasion resistance and rebound.

The adhesive interlining of the present invention is excellent in abrasion resistance and repulsion because the adhesive resin is adhered to at least one surface of the entangled nonwoven fabric.

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-56-15455 (JP, A) JP-A-61-258060 (JP, A) JP-A-4-202895 (JP, A) JP-A-4- 185792 (JP, A) JP-A-4-361618 (JP, A) JP-A-4-153352 (JP, A) JP-A-60-193996 (JP, U) JP-B-49-1242 (JP, B1) JP-B-47-49762 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D04H 1/00-18/00 D21H 11/00-27/42

Claims (6)

(57) [Claims] 1. A fiber web containing cellulose fibers obtained by a solvent extraction method, wherein the fiber web is entangled with the fiber web.
A part of the cellulose fiber is branched by applying the joint treatment.
An entangled nonwoven fabric which is entangled at the same time as having a different degree of branching on the front and back surfaces of the fiber web. 2. The entangled nonwoven fabric according to claim 1, wherein the surface of the cellulose fiber having a higher degree of branching has a degree of branching at least twice that of a surface having a lower degree of branching. 3. The entangled nonwoven fabric according to claim 1, wherein the cellulose fibers on the surface having a high degree of branching have branched fibrils of 3 to 60 fibers / 50 μm. 4. A fibril branched from a cellulose fiber on a surface having a high degree of branching has a diameter of 0.2 to 2 μm.
The entangled nonwoven fabric according to any one of claims 1 to 3, wherein 5. The entangled nonwoven fabric according to any one of claims 1 to 4, wherein the content of the cellulose fiber is 20 to 90% by weight. 6. An adhesive interlining, wherein an adhesive resin is attached to at least one surface of the entangled nonwoven fabric according to any one of claims 1 to 5.