JPH09250064A - Suede-tone sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a suede-tone sheet improve in appearance, flexibility and handle, excellent in mechanical strength and natural in coloring feeling. SOLUTION: In this suede-tone sheet containing an elastic polymer in a nonwoven fabric composed of an interlaced ultrafine fiber bundle and having at least one napped face, the fiber bundle is composed of the following ultrafine fiber boundle A and ultrafine fiber bundle B. The ultrafine fiber bundle A consists essentially of an ultrafine fiber having <=4μm<2> cross-section area S containing an ultrafine fiber C having 5-100μm<2> cross-section area S and satisfying relation between length L1 of the outer periphery of the section or the sum of the outer periphery and the inner periphery of an opening part and the circumference L0 of the true circle corresponding to the cross-section area S of L1 /L0 >=1.3. The ultrafine fiber bundle B is composed of an ultrafine fiber having <=4μm<2> cross-section area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suede-like sheet having a good appearance, flexibility and texture, excellent mechanical properties, and a natural coloring feeling.

[0002]

2. Description of the Related Art Conventionally, a suede-like sheet composed of an ultrafine fiber bundle and an elastic polymer has been known. As a fiber capable of generating an ultrafine fiber bundle, a multi-component fiber having various cross-sectional structures by a multi-component melt spinning method has been conventionally proposed, and as a general example, at least two kinds of polymers are used. At least one type of island component (dispersion component) polymer has an average fineness in at least one type of sea component (dispersion medium component) polymer obtained by the method of melting and kneading in the same melting system and spinning. There is a mixed spun fiber with a simple sea-island cross-section structure in which ultrafine fibers are mixed and dispersed in the sea component, and at least two kinds of polymers are melted in another system and both are spun at the spinning head. A simple sea-island cross-section structure obtained by repeating splicing-splitting a plurality of times to form a mixed system of both and spinning, or a method of merging both by defining the fiber shape at the spinning head and merging. Composite spinning There is a fiber.

In the suede-like leather-like sheet for which appearance, texture, etc. are particularly required in terms of quality, ultrafine fibers having a smaller average fineness and a smaller fineness distribution in the cross section of the ultrafine fiber bundle are generally preferable. When the fineness distribution is reduced, the color developability deteriorates and the mechanical strength is further deteriorated. When the suede-like sheet obtained by using only fibers having a uniform fineness has a uniform coloring property, it lacks the so-called natural coloring feeling of the delicate shade as seen in natural suede.

In the suede-like sheet, it is effective to mix ultrafine fibers having different fineness in the suede-like sheet in order to achieve both the appearance, flexibility, texture and other sensibilities, mechanical strength, and color appearance. Japanese Patent Laid-Open No. Sho 63
In the -75108 publication, in a fiber cross-sectional structure composed of an inner layer and an outer layer, the sea component of the inner layer is inverted to the island component of the outer layer, and the boundary line between the inner layer and the outer layer has a length L ₁ Is the circumference L ₀ and L _{1 of} the true circle corresponding to the cross-sectional area of the inner layer ≧
Non-circular multi-component fibers having pleats satisfying the relationship of 1.2 L ₀ , and in JP-A-63-243314, the distribution of the size of the island component is 1/4 of the radius from the outer circumference.
Fineness D _{S of the} island component existing within and the radius of 2 from the center
The relationship with the fineness D _{C of the} island component existing within / 3 is D _C ≧
Mixed spun fiber structure satisfying 1.5D _S is also in Japanese European Patent Publication No. 651091 of 0.02 to 0.2 denier as the island component 1/5 or less of the fineness of the microfine fibers A and ultrafine fibers A The ultrafine fibers B are mixed and dispersed in the cross section of the fiber bundle, and the number ratio (A / B) is 2/1.
A composite spun fiber structure of ~ 2/3 is described. Further, a method for producing a mixed cotton type entangled nonwoven fabric is known in the art, which is mainly composed of an ultrafine fiber bundle composed of ultrafine fibers having an evenly uniform fineness, and which is mixed with ultrafine fibers having different finenesses for improving mechanical properties.

[0005]

Recently, even in the field of suede-like sheets, there is a demand for a high degree of compatibility between appearance, flexibility, feeling such as texture, mechanical strength, and color development, that is, high quality. Various structures of ultrafine fiber bundles have been proposed for the purpose of improvement. JP-A-63-7510
The technique described in Japanese Patent Publication No. 8 can improve the mechanical properties of a suede-like sheet, but deteriorates the quality in terms of sensitivity such as flexibility and texture.
In the technology described in JP-A-63-243314 and EP-A-651091, the mechanical properties of the base sheet itself, such as tear strength, are good, but a suede-like sheet is used. , It is not at a satisfactory level in terms of sensitivity.

Further, the method of mixing and using at least two kinds of ultrafine fiber bundles in which the fineness of the ultrafine fibers is different, the degree of freedom in adjusting the fineness difference of the ultrafine fibers is large, so that the quality and physical properties of the suede-like sheet in terms of sensitivity and physical properties are high. However, if the opening of the two types of ultrafine fiber bundles is not enough, dyeing spots are likely to become apparent, and a high level of management in the opening process is required. The present invention provides a high-quality suede-like sheet having a good appearance, flexibility, and texture, excellent mechanical properties, and a natural coloring feeling.

[0007]

According to the present invention, the cross-sectional area S is 4
A leather-like sheet comprising an ultrafine fiber bundle mainly comprising ultrafine fibers of not more than μm ² and an elastic polymer, wherein the ultrafine fiber bundle has a cross-sectional area S of 5 to 100 μm ² and an outer periphery or outer periphery of the cross section and an opening. The relationship between the total length L ₁ of the inner circumference of L and the circumference L _{0 of the} perfect circle corresponding to the cross-sectional area S is L ₁ / L ₀ ≧ 1.
A suede-like sheet comprising an ultrafine fiber bundle A containing the ultrafine fibers C satisfying 3 and an ultrafine fiber bundle B not containing the ultrafine fibers C.

The suede-like sheet of the present invention can be obtained, for example, by combining the following steps. That is, the island component is mixed and dispersed in the sea component that can be removed by dissolution or decomposition, and the cross-sectional area S is 5 in the ultrafine fiber bundle mainly composed of the ultrafine fibers having the cross-sectional area S of 4 μm ² or less.
.About.100 μm ² and the total length L ₁ of the outer circumference of the cross section or the outer circumference and the inner circumference of the opening and the circumference L _{0 of the} perfect circle corresponding to the cross sectional area S are L ₁ / L ₀ ≧ 1. Ultrafine fiber bundle A containing ultrafine fibers C satisfying 3 and capable of being transformed into ultrafine fiber generating fiber A ′ and ultrafine fiber bundle B not containing ultrafine fibers C
The step of producing the ultrafine fiber-generating fiber B'that can be modified into the same or separately, the step of producing an entangled nonwoven fabric composed of the fibers A'and B ', and the nonwoven fabric can be dissolved and removed as necessary. A step of temporarily fixing with a resin or the like, a step of impregnating the entangled nonwoven fabric with an elastic polymer liquid and wet coagulating to produce a base sheet, a step of transforming the fibers into an ultrafine fiber bundle, and raising at least one surface of the base sheet Through the steps, the suede-like sheet of the present invention can be manufactured.

In the ultrafine fiber-generating fiber of the present invention, the polymer constituting the island component is a melt-spinnable polyamide such as 6-nylon or 66-nylon, polyethylene terephthalate, polybutylene terephthalate, or cationic polymer. At least one kind of polymer selected from melt-spinnable polyesters including dye-type modified polyethylene terephthalate, and the polymer constituting the sea component is soluble or degradable in the island component and the solvent or decomposing agent. Different, is a polymer having a low affinity with the island component, and has a melt viscosity smaller than the melt viscosity of the island component under spinning conditions, or a polymer with a small surface tension, such as polyethylene, polystyrene, Modified polystyrene, ethylene propylene copolymer, sulfoisophthalate Polyethylene terephthalate modified with Le sodium, etc. is at least one polymer selected from polymers such as.

There are two types of ultrafine fiber-generating fibers of the present invention: a fiber A'that can be transformed into an ultrafine fiber bundle A and a fiber B'that can be transformed into an ultrafine fiber bundle B. The fiber A'is ,
One or a plurality of ultrafine fibers C are uniformly dispersed in the fiber cross section, or can be transformed into an ultrafine fiber bundle A in a locally ubiquitous state, and the fibers B ′ are the ultrafine fibers C. It is a fiber that can be transformed into an ultrafine fiber bundle B that does not contain it.

Such ultrafine fiber-generating fiber is a mixed spinning using a spinneret in which a polymer constituting an island component and a polymer constituting a sea component are melted in the same melting system, and concentric annular discharge holes are arranged. Is obtained by Spinning method of ultrafine fiber generating fiber A ′ and ultrafine fiber generating fiber B ′ alone, or spinning method in which ultrafine fiber generating fiber A ′ and ultrafine fiber generating fiber B ′ are mixed in a non-selective ratio Are conventionally known, for example, selection of the mixing ratio of the island component polymer and the sea component polymer, spinning conditions such as the cooling state of the molten polymer discharged from the spinneret with low-temperature air, and the geometry of the discharge hole on the surface of the spinneret. The ratio of the fiber A ′ and the fiber B ′ obtained from one spinneret can be selected by selecting the geometrical arrangement and the like.

The mixing ratio of the island component polymer and the sea component polymer is 40 / by weight in terms of spinning stability and economy.
60-80 / 20, preferably 45 / 55-70 / 30
By increasing the mixing ratio of the island component polymer within this range, the ratio of the fiber A ′ to the fiber B ′ obtained from one spinneret can be increased.

The blowing conditions of the low temperature air for cooling the molten polymer discharged from the die include the blowing angle of the discharge holes with respect to the concentric annular arrangement, the blowing wind velocity or the temperature of the low temperature air, and the tangential line to the annular arrangement. When the direction is 0 ° and the central direction is 90 °, the spray angle is
30 to 90 °, preferably 45 to 90 °, and the blowing wind speed is 0.3 to 8 m / s, preferably 0.5 to 6.5 m / s, more preferably 0.8 to 5 m.
/ S, and the temperature of the low temperature air is 0 to 40 ° C. By combining conditions such as making the blowing angle and blowing wind speed smaller to make it difficult for low temperature air to reach the inner layer, or making the temperature of the low temperature air higher, the inner layer of the spinneret with concentric annular ejection holes is arranged. In the arranged holes, the molten polymer is harder to cool than in the outer layer, and the formation of the fiber A ′ is further promoted in the inner layer. Further, in the geometric arrangement of the discharge holes arranged in a concentric annular shape on the spinneret, the pitch in the outer ring annular rows should be relatively small, or the pitch between the annular rows should be relatively large, or the annular row should be relatively large. By making the number relatively large, a difference occurs in the cooling state between the inner layer and the outer layer due to the blowing of low-temperature air, and the fibers A ′ are more likely to be formed in the inner layer than in the outer layer. That is, the fibers B ′ are spun in the outer layer by selecting the blowing conditions of low temperature air and the geometric hole arrangement of the spinneret so that the inner layer of the spinneret is more difficult to cool than the outer layer. Thus, the formation of the fibers A ′ is promoted in the inner layer, and the ratio of the fibers A ′ can be selectively increased.

Here, the ultrafine fiber bundle A and the ultrafine fiber bundle B
With respect to the ultrafine fibers other than the ultrafine fibers C, the cross-sectional area S is set to 4 μm ² or less, preferably 2.5 μm ² or less in order to ensure the appearance quality and texture of the leather-like sheet. The ultrafine fibers C may be included in one or a plurality of cross sections of one ultrafine fiber bundle A, and may be evenly dispersed in the cross section of the ultrafine fiber bundle A. Although it may be locally distributed, the number of ultrafine fibers C in the cross section of one ultrafine fiber bundle A in order to improve mechanical properties of the leather-like sheet and to ensure flexibility and texture at the same time. Is 1 to 10, preferably 1 to 5, and the size is such that the cross-sectional area S obtained from the cross-sectional photograph of the ultrafine fiber bundle A is 5 to 100 μm ² , preferably 5 to 50 μm.
m ² and its cross-sectional shape is the length L ₁ and the cross-sectional area S thereof obtained by summing the outer circumference of the cross section of the ultrafine fibers C or the sum of the outer circumference and the inner circumference of the opening obtained from the cross-sectional photograph of the ultrafine fiber bundle A. The relationship with the circumference L ₀ of the corresponding perfect circle is L ₁ / L ₀ ≧
It has a non-circular shape or an opening satisfying 1.3, preferably 3.0 ≧ L ₁ / L ₀ ≧ 1.6. Extra fine fiber C
The number exceeds 10 or its cross-sectional area S is 100 μm
^When it exceeds ² , the flexibility and texture of the leather-like sheet cannot be secured, and when L ₁ / L ₀ in the ultrafine fiber C is less than 1.3, mechanical properties such as tear strength of the suede-like sheet are deteriorated. .

The ultrafine fiber-generating fiber A'and the ultrafine fiber-generating fiber B'in the suede-like sheet may be spun separately or mixed and used, or spun simultaneously with one spinneret. It is good, but the mixing ratio of the ultrafine fiber bundle A and the ultrafine fiber bundle B is 5/95 or more depending on the application of the suede-like sheet.
95/5, preferably 10/90 to 65/35. When only the ultrafine fiber bundle A is used, the quality of mechanical properties such as tear strength of the suede-like sheet is good, but it is difficult to secure the quality in terms of appearance such as appearance, flexibility and texture. If only the ultrafine fiber bundle B is used, the quality of the sensitive surface of the leather-like sheet is good, but the quality of the mechanical physical properties is deteriorated.

The ultrafine fiber-generating fiber A'and the ultrafine fiber-generating fiber B'are processed into a fiber having a fineness of 2 to 20 denier through processing steps such as drawing, crimping, heat setting, and cutting, if necessary. The ultrafine fiber-generating fibers are opened with a card to form a random web or a crosslap web through a webber, and the obtained fibrous web is laminated to have a desired weight and thickness. Then, entanglement treatment is performed by a known method such as needle punching or high-speed fluid flow punching to obtain a nonwoven fabric. If necessary, the obtained non-woven fabric is impregnated with an aqueous solution of a polyvinyl alcohol resin, dried and temporarily fixed. By this temporary fixing, it is possible to prevent the nonwoven fabric from breaking even if a large amount of tension is applied to the nonwoven fabric in the subsequent elastic polymer impregnation step. Note that this temporary fixing may be performed by using a heat bonding method when the fibers forming the nonwoven fabric are easily bonded to each other by heat.

Next, the fiber entangled nonwoven fabric is impregnated with an elastic polymer,
Solidifies. The elastic polymer with which the fiber-entangled nonwoven fabric is impregnated is, for example, at least one polymer diol selected from polyester diol, polyether diol, polycarbonate diol, polylactone diol having an average molecular weight of 500 to 3,000, and 4,4 ′. At least one selected from aromatic and alicyclic diisocyanates such as diphenylmethane diisocyanate, isophorodiisocyanate, and hexamethylene diisocyanate
It is a polyurethane obtained by reacting at least one kind of low molecular weight compound having two or more active hydrogen atoms with a desired molar ratio. Polyurethane is used as a polymer composition to which a polymer such as synthetic rubber or polyester elastomer is added, if necessary.

A polyurethane-based polymer is impregnated into a fiber-entangled nonwoven fabric as a polymer liquid obtained by dispersing it in a solvent or a dispersant, treated with a non-solvent of the polymer and wet-coagulated to form a fibrous substrate. To do. Additives such as colorants, coagulation regulators, and antioxidants are added to the polymer liquid as needed.
The amount of polyurethane or polyurethane composition in the fibrous substrate is preferably in the range of 10 to 50% by weight as a solid content.

The fibrous substrate impregnated and coagulated with the polymer is treated with a solvent or a decomposing agent which is a non-solvent for the ultrafine fiber component and the polymer, and which is a sea component of the ultrafine fiber-generating fiber. The shaped fibers can be transformed into ultrafine fiber bundles, and a base sheet composed of the ultrafine fiber bundles and the elastic polymer can be obtained. The thickness of the base sheet is controlled by adjusting the fiber specific gravity and thickness of the fiber-entangled nonwoven fabric, and the amount and coagulation conditions of the polyurethane composition contained therein,
It is preferably within the range of 0.3 to 3 mm.

Next, at least one surface of the obtained base sheet is raised by a known method such as buffing with sandpaper or the like to form a fiber raised surface mainly containing ultrafine fibers. The resulting suede-like fibrous substrate is then dyed. Dyeing is carried out by an ordinary dyeing method using a dye mainly composed of an acid dye, a metal complex dye, a disperse dye or the like depending on the type of fiber. The dyed suede-like fibrous base material is subjected to finishing treatment such as chaffing, softening treatment and brushing to obtain a suede-like sheet product. The suede-like sheet obtained by the present invention has good appearance, flexibility, texture, and the like, excellent mechanical properties, and has a natural coloring feeling.

[0021]

EXAMPLES The embodiments of the present invention will now be described with reference to specific examples, but the present invention is not limited to these examples. The parts and percentages in the examples relate to weight unless otherwise specified. Example 1 60 parts of 6-nylon as an island component and 40 parts of polyethylene as a sea component were melted in the same melting system, and concentrically annularly arranged in 10 rows with a row-to-row pitch of 5 mm. 5 rows of 3 mm, inner layer 5 rows of 5 mm using a die, low temperature air 25 ℃, spray angle 60
Was spun at a blowing air velocity of 7 m / s to obtain a mixed spun fiber having a single yarn fineness of 18 denier. The obtained fiber was stretched to 3.0 times and mechanically crimped, and then the fiber length 51
After being cut into mm and opened with a card, a web was formed with a cross wrap webber and further subjected to needle punching to obtain a fiber-entangled nonwoven fabric. This fiber-entangled nonwoven fabric was impregnated with a composition liquid of 18 parts of polyester-based polyurethane and 82 parts of dimethylformamide, coagulated and washed with water, and then polyethylene in the mixed spun fiber was extracted and removed in toluene to give a 6-nylon ultrafine fiber bundle. Unit weight 48 made of fiber and polyurethane
A base sheet having a thickness of 0 g / m ² and a thickness of about 1.3 mm was obtained.

When the cross section of the obtained ultrafine fiber bundle of the suede-like sheet is observed with an electron microscope, the cross-sectional area is 0.6 to 1.
Mainly composed of ultrafine fibers of 8 μm ² and having a cross-sectional area S of 6 to 17
μm ² and the relationship L ₁ / L ₀ between the total length L ₁ of the outer circumference of the cross section or the outer circumference and the inner circumference of the opening and the circumference L _{0 of the} perfect circle corresponding to the cross section area S is 1.4. Ultrafine fiber bundle A in which about 1 to about 1.9 ultrafine fibers C are uniformly dispersed or locally distributed, and an ultrafine fiber bundle having an average cross-sectional area of 1.1 μm ² and not containing the ultrafine fibers C B and B were mixed at a ratio of 55/45. One side of this base sheet was ground with sandpaper to a uniform thickness of 1.2 mm, and the other side was treated with an emery buffing machine to form a fine fiber raised surface,
Furthermore, using Irgaran Red 2GL (Chiba Geigy), 2.5
Stained at a concentration of% owf. The suede-like sheet obtained by finishing had good appearance, flexibility, texture and the like, excellent mechanical properties such as tear strength, and had a natural coloring feeling. The test results of the obtained suede-like sheet are shown in Table 1 together with the results of other examples and comparative examples.

Comparative Example 1 6 parts of 6-nylon as the island component was melted,
As a sea component, 5 parts of 6-nylon and 35 parts of polyethylene were melted in the same melting system different from the island component, and the number of islands was 50 by the method of defining the fiber shape in the spinneret part and spinning. A suede-like sheet was obtained in the same manner as in Example 1 except that only the composite spun fiber having a single yarn fineness of 15 denier spun as described above was used. When the cross section of the ultrafine fiber bundle of the obtained suede-like sheet is observed by an electron microscope, the average cross-sectional area of 50 pieces is 6 μm ² , and L ₁ / L ₀ is 1.0 to
1.1 ultra-fine fibers and an average cross-sectional area of about 50 0.5 μm ²
The ultrafine fibers of No. 1 were dispersed almost uniformly in the ultrafine fiber bundle. The obtained suede-like sheet was good in appearance, flexibility and texture, but was inferior in mechanical properties. The test results of the obtained suede-like sheet are shown in Table 1 together with the results of Examples and other comparative examples.

Comparative Example 2 A mixture of 50 parts of 6-nylon as an island component and 50 parts of polyethylene as a sea component in the same melting system was used. Low temperature air temperature of 25 ℃,
A suede-like sheet was obtained in the same manner as in Example 1 except that only mixed spun fibers having a single yarn fineness of 15 denier spun under the conditions of a spraying angle of 60 ° and a spraying air velocity of 5 m / s were used. When the cross section of the obtained ultrafine fiber bundle of the suede-like sheet is observed with an electron microscope, the average cross-sectional area is 0.8 μm.
The ultrafine fibers of m ² were dispersed almost uniformly in the ultrafine fiber bundle, and the ultrafine fibers having a cross-sectional area of 5 μm ² or more did not exist. The obtained suede-like sheet had good appearance, flexibility, texture, etc., but poor mechanical properties,
Further, it was a product having a monotonous coloring feeling. The test results of the obtained suede-like sheet are shown in Table 1 together with the results of Examples and other comparative examples.

Comparative Example 3 A mixed spun fiber having a single yarn fineness of 15 denier spun in the same manner as in Comparative Example 2 and a 6-nylon single fiber having a circular cross-section having a single yarn fineness of 5 denier and having a weight ratio of 70% to 30%. A suede-like sheet was obtained in the same manner as in Example 1 except that the suede-like sheet was mixed and used. When the cross section of the obtained suede-like sheet is observed with an electron microscope, the average cross-sectional area is 0.8 μm ²
The ultrafine fiber bundle containing no ultrafine fibers having a cross-sectional area of 5 μm ² or more and the single fibers having an average cross-sectional area of 160 μm ² were almost uniformly dispersed and entangled with each other. The resulting suede-like sheet was excellent in mechanical properties such as tear strength, but was inferior in appearance, flexibility and texture. The test results of the obtained suede-like sheet are shown in Table 1 together with the results of Examples and other comparative examples.

Comparative Example 4 60 parts of 6-nylon as an island component and 40 parts of polyethylene as a sea component were melted in the same melting system, and concentric annular discharge holes were formed with an in-row pitch of 3 mm and an inter-row pitch of 5 mm.
Using a base arranged in 5 rows, the low temperature air temperature is 25 ℃,
A suede-like sheet was obtained in the same manner as in Example 1 except that only fibers spun with a single yarn fineness of 20 denier were used under the conditions of a blowing angle of 60 ° and a blowing wind speed of 4 m / s. When the cross section of the ultrafine fiber bundle of the obtained suede-like sheet is observed with an electron microscope, the cross-sectional area is 0.6 to 1.8 μm ²
The cross-sectional area S is 6 to 17 μm ² , and the total length L ₁ and cross-sectional area S of the outer circumference of the cross section or the outer circumference and the inner circumference of the opening are ultrafine fibers C in relation L ₁ / L ₀ of the circumference L ₀ of the corresponding circularity of about 1.4 to 1.9 has been ubiquitous in uniformly distributed or localized about 1 to 3 present. The resulting suede-like sheet had good mechanical properties such as tear strength, but was inferior in flexibility and texture. The test results of the obtained suede-like sheet are shown in Table 1 together with the results of Examples and other comparative examples.

Example 2 A mixed spun fiber having a single yarn fineness of 15 denier spun in the same manner as in Comparative Example 2 and a mixed spun fiber having a single yarn fineness of 20 denier spun in the same manner as Comparative Example 4 were used in a weight ratio of 65%. A suede-like sheet was obtained in the same manner as in Example 1 except that the mixture was used at a ratio of 35%. When the cross section of the ultrafine fiber bundle of the obtained suede-like sheet is observed with an electron microscope, the ultrafine fibers having a cross-sectional area of 0.6 to 1.8 μm ² are mainly
The cross-sectional area S is 6 to 17 μm ² , and the relation L ₁ / of the outer circumference of the cross section or the total length L ₁ of the outer circumference and the inner circumference of the opening and the circumference L _{0 of the} perfect circle corresponding to the cross-section area S L ₀ is 1.4 to
Approximately 1 to 3 ultrafine fibers C are evenly dispersed or locally distributed around the ultrafine fiber bundle A, and the cross-sectional area is 0.6 to
The ultrafine fiber bundle B composed of 1.4 μm ² ultrafine fibers and having a cross-sectional area of 5 μm ² or more and not containing the ultrafine fibers was mixed at a ratio of 60/40. The obtained suede-like sheet has good appearance, flexibility, texture, and tear strength.
It was excellent in mechanical properties such as peel strength between the skin layer and the substrate. The test results of the obtained suede-like sheet are shown in Table 1 together with the results of other examples and comparative examples.

[0028]

[Table 1]

[0029]

EFFECTS OF THE INVENTION The suede-like sheet of the present invention has good appearance quality, flexibility, feeling quality such as texture, excellent mechanical properties such as tear strength, and natural coloring. It can be used for clothing, shoes, bags and gloves.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an ultrafine fiber generating fiber A ′ of the present invention.

[Explanation of symbols]

 1 Sea component 2 Island component (ultrafine fiber C) 3 Island component (ultrafine fiber that constitutes the main body of ultrafine fiber bundle)

Claims (1)

[Claims] 1. A suede-like sheet in which an elastic polymer is contained between intertwined ultrafine fiber bundles and at least one surface of which is raised, wherein the fiber bundles include the following ultrafine fiber bundles A and B. A suede-like seat featuring. (A) In an ultrafine fiber bundle mainly composed of ultrafine fibers having a cross-sectional area S of 4 μm ² or less, the cross-sectional area S is 5 to 100 μm ² ,
Further, the relation between the outer circumference of the cross section or the total length L ₁ of the outer circumference and the inner circumference of the opening and the circumference L _{0 of the} true circle corresponding to the cross sectional area S satisfies L ₁ / L ₀ ≧ 1.3. Ultrafine fiber bundle containing ultrafine fibers (B) Ultrafine fiber bundle composed of ultrafine fibers having a cross-sectional area S of 4 μm ² or less