JPH0637752B2 - How to finish suede-like sheets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a suede-like sheet finishing method which is soft and has a swelling feeling, and has good nap properties. In particular, the present invention relates to a method of imparting flexibility with a feeling of swelling to a thin suede-like sheet and finishing the product with good dyeing friction fastness.

<Prior Art> Conventionally, as a method of softening a suede-like sheet, a method of mechanically rubbing after applying a softening agent is generally performed. Further, as a method of softening by a mechanical action, an eclectic nozzle having a specific cross-sectional area is circulated through water, hot water or pressurized hot water to give a kneading action to soften it. The method is Japanese Examined Japanese Patent Sho 50-372
No. 41 publication, it is characterized in that a fluid flow of 1.1 to 11 times the moving speed is brought into contact in the same direction as the moving direction of the napped sheet material to improve the orientation of the napped surface and impart flexibility. It is proposed in Japanese Patent Publication No. 51-46801.

<Problems to be Solved by the Invention> The conventional softening finishing method for suede-like sheets is an effective method for treating thick materials. However, even if a thin suede-like sheet having a thickness of 0.8 mm or less, especially 0.6 mm or less is treated by a conventional mechanical softening method or a softening method using a softening agent, the obtained sheet is It is a paper-like thin texture or is flexible but has a large rubber repulsion, and does not give the flexibility having a bulging feeling like natural leather.

An object of the present invention is to provide a finishing method for a suede-like sheet having a swelling feeling like soft natural leather and having good nap properties, dyeing fastness, and dyeing rubbing fastness.

<Means for Solving the Problems> The present invention provides a fiber-entangled nonwoven fabric composed mainly of ultrafine fibers having a single fiber average fineness of 0.1 denier or less and / or bundled fibers thereof, and an elastic material composed mainly of polyurethane. When finishing a suede-like sheet in which a napped surface of ultrafine fibers is formed on at least one surface of a substrate made of a polymer, the suede-like sheet is treated in water or an aqueous dye solution, and after drying, an organic material which does not dissolve the constituent materials of the sheet. It is a finishing method for a suede-like sheet, which is characterized in that the treatment is carried out in a liquid by a processing device having a kneading mechanism, the treatment liquid is removed, and then dried while giving a kneading action.

Further, the present invention provides a substrate comprising a fiber-entangled nonwoven fabric mainly composed of ultrafine fibers having a single fiber average fineness of 0.1 denier or less and / or bundled fibers thereof, and an elastic polymer mainly composed of polyurethane. When finishing a suede-like sheet with a napped surface of ultrafine fibers on at least one side,
After the suede-like sheet is treated in water or an aqueous dye solution and dried, at least one selected from a softening agent, a greasing agent, a cleaning agent, and an antistatic agent is added to an organic liquid that does not dissolve the constituent materials of the sheet. It is a finishing method of a suede-like sheet, which comprises adding and treating with a treating device having a kneading mechanism, removing the treatment liquid, and then drying while giving a kneading action.

Further, the present invention is a fiber-entangled nonwoven fabric composed mainly of ultrafine fibers having a single fiber fineness of 0.1 to 0.001 denier and / or bundled fibers thereof, and a stress at 100% elongation of 0.20 to 1 A suede-like sheet for finishing a thin suede-like sheet having a thickness of 0.8 to 0.25 mm in which a napped surface of ultrafine fibers is formed on at least one surface of a substrate mainly composed of polyurethane of 0.00 kg / mm ² and an elastic polymer. Is treated in water or an aqueous dye solution and dried, and then selected from a softening agent, a greasing agent, a cleaning agent, and an antistatic agent, if necessary, in an organic liquid that does not dissolve the sheet constituent materials and most of the dye. In addition, at least one kind is added, the mixture is treated with a treatment device having a kneading mechanism, the treatment liquid is removed, and then dried while giving a kneading action, which is a finishing method for a suede-like sheet.

That is, a sheet-like substrate comprising a fiber-entangled nonwoven fabric of ultrafine fibers and / or bundle fibers thereof used for producing the suede-like sheet of the present invention and a polymer mainly composed of polyurethane is a fiber-entangled nonwoven fabric. The constituent fibers are, for example, 6-nylon, 66-nylon, 610-nylon, 12-
Nylon, other fiber-forming polyamides, polyethylene terephthalate, ethylene terephthalate copolymer, polybutylene terephthalate, other fiber-forming polyesters, acrylic polymers and other spinnable polymers were spun and stretched to obtain An ultrafine fiber entangled nonwoven fabric is formed using ultrafine fibers, and an elastic polymer is contained to form a base body made of the ultrafine fiber entangled nonwoven fabric and the elastic polymer. Alternatively, the above spinnable polymer is used as an ultrafine fiber component, and the other spinnable polymer is spun into an ultrafine fiber generating fiber, and the fiber obtained by stretching is used to form a fiber entangled non-woven fabric. After containing the elastic polymer, the ultrafine fiber generating fiber is treated to form a fiber entangled nonwoven fabric of ultrafine fiber bundle fibers, and a substrate composed of the ultrafine fiber bundle fiber entangled nonwoven fabric and the elastic polymer, or the fiber After the entangled nonwoven fabric is temporarily fixed, the ultrafine fiber generating fiber is treated to form a fiber entangled nonwoven fabric of ultrafine fiber bundle fibers, and an ultrafine fiber bundle fiber entangled nonwoven fabric and an elastic polymer obtained by containing an elastic polymer The substrate is composed of The single fiber average fineness of the ultrafine fibers constituting the substrate or the ultrafine fibers made of the bundled fibers thereof is 0.3 denier or less. Ultrafine fibers having an average single fiber fineness of 0.1 to 0.001 denier are preferred.
Further, the basis weight of the fiber-entangled nonwoven fabric is 80 to 200 g / m ² for the fiber-entangled nonwoven fabric as the final product. And
Polyurethane to be contained in the fiber entangled non-woven fabric is a polyester diol having an average molecular weight of 500 to 2500, a polyether diol, a polyester ether diol,
At least one polymer diol selected from the group of polylactone diols and polycarbonate diols, and at least one kind of polymer diol selected from the group consisting of aromatic ring-containing diisocyanates, cyclic group-containing aliphatic diisocyanates and alicyclic diisocyanates. A polyurethane obtained by reacting an organic diisocyanate with a compound having two active hydrogen atoms as a chain extender. Preferably 10
A polyurethane having a stress at 0% elongation of 0.20 to 1.00 kg / mm ² is used. When the stress at 100% elongation of the polyurethane is out of the above range, the elastic behavior of the thin sheet oriented in the present invention becomes large, or the thin sheet becomes stiff and soft and has a swelling feeling like natural leather. A product with a texture cannot be obtained. Further, polyurethane may be used as a polyurethane composition in which a polymer selected from a synthetic rubber, a vinyl chloride polymer, an elastic polymer containing a silicon atom and the like is mixed. The amount of polyurethane or polyurethane composition in the sheet-shaped substrate is 10 to 50% by weight, preferably 15 to 40% by weight. When the content of the polymer mainly composed of polyurethane occupying the sheet-shaped substrate is out of the above range,
In particular, the thin sheet directed in the present invention is not preferable because it loses its stiffness, the swelling is not obtained, and the elastic behavior becomes large.

Next, a sheet-like substrate made of an ultrafine fiber entangled nonwoven fabric and a polymer mainly composed of polyurethane has a fiber napped surface mainly composed of ultrafine fibers on at least one surface. That is, after the thickness of the sheet-shaped substrate is adjusted to a desired thickness or before the thickness adjustment, at least one surface of the sheet-shaped substrate is raised by a raising machine, buffing treatment with sandpaper, etc. A napped surface composed mainly of is formed into a suede-like fiber napped sheet. Then, in the case where the thickness of the sheet is not adjusted, the back surface is processed to a desired thickness to adjust the thickness. In particular, the preferred suede-like fiber napped sheet used in the finishing of the present invention is a thin suede-like sheet having a thickness of 0.8 mm or less, more preferably 0.6 to 0.25 mm.

A suede-like fiber napped sheet having a microfiber napped surface formed on at least one surface is treated in water. The underwater treatment is performed with normal temperature water or hot water heated to a desired temperature to alleviate the strain generated during the production of the sheet and to remove the deposits generated by the nap treatment on the surface. This underwater treatment may be performed alone, but may also be performed for dyeing the suede-like fiber napped sheet. The suede-like sheet treated in water is dried, and then treated in the organic liquid that does not dissolve most of the dyes and the constituent materials such as fibers, polyurethane-based polymers and other materials that make up the suede-like sheet. . The organic liquid is selected from liquid hydrocarbons in which 2 to 4 hydrogen atoms are replaced by chlorine or fluorine, aromatic compounds such as toluene and xylene, and inert organic liquids such as petroleum liquid hydrocarbons. At least one organic liquid. A composition liquid containing at least one selected from commercially available agents such as softeners, greasing agents, detergents such as nonionic surfactants or anionic surfactants, and antistatic agents is added to the organic liquid. It is preferable to use as. And the method of treating a suede-like fiber napped sheet with an organic liquid or an organic liquid composition is performed with a treatment device having a kneading mechanism. As a processing device having a kneading mechanism, for example, a dyeing machine such as a Wins dyeing machine, a jet dyeing machine, a sarkyler dyeing machine, or a tumbler type solvent processing machine can be used. The organic liquid treatment is performed for 1 to 10 minutes in a liquid heated to room temperature or a temperature set up to about 40 ° C. After the treatment, the excess liquid adhering to the sheet is removed by squeezing liquid or centrifugal dewatering, and dried while giving a rubbing effect. As the dryer having a kneading effect, for example, a tumbler type dryer can be used. Then, the processed suede-like sheet is subjected to a mechanical rubbing treatment, a fiber napped surface to a brushing treatment, and the like to prepare a product, if necessary.

The obtained suede-like sheet has a soft texture even if it is thin and has a swelling feeling like natural leather, and has a nap property,
A fiber napped suede-like sheet with excellent dyeing fastness and dyeing rubbing fastness. This suede-like seat is suitable for apparel, especially undergarments, gloves, legs of soft boots, interiors, and apparel.

<Operation> In particular, the strain generated when a thin fiber napped suede-like sheet is produced is large and cannot be sufficiently relaxed by the conventional softening treatment method. By adding an inert organic liquid to the strain generated in such a thin fiber napped suede-like sheet, it is processed by a processing device having a kneading mechanism, and by drying while giving a kneading effect in a state containing the organic liquid,
The strain can be sufficiently relaxed, and thereby the sheet has a bulging feeling. Further, the dye in an insufficiently dyed state or the dye that is not dyed is removed, or the dye is rearranged to improve the dyeing fastness.

<Examples> Next, embodiments of the present invention will be described with reference to specific examples, but the present invention is not limited to these examples.
The parts and% in the examples relate to the weight unless otherwise specified.

Example 1 (Manufacturing Method of Substrate) A stretched multi-component fiber having a fineness of 6 denier consisting of 60 parts of 6-nylon (dispersion component) and 40 parts of polyethylene (dispersion medium component) was crimped and cut into a fiber length of 51 mm. As staple fiber, average weight per unit after passing through card and random webber 4
A 50 g / m ² cross-tapped web was made and needle punched to obtain a fiber entangled nonwoven fabric with an average basis weight of 465 g / m ² , which was a polyether polyurethane.
(Stress at 100% elongation 0.58 Kg / mm ² ) A 13% dimethylformamide solution of a polyurethane composition as a main component was impregnated, coagulated in a non-solvent coagulating liquid containing dimethylformamide, washed with water, and a multi-component fiber Polyethylene inside was extracted by solvent treatment, and a basis weight 419 g / m ² composed of a fiber-entangled non-woven fabric of bundled fibers of 6-nylon ultrafine fibers (single fiber average fineness 0.011 denier) and polyurethane, thickness 0.96
A sheet-shaped substrate of mm was obtained. This sheet-shaped substrate is divided into two parts, the divided surface is buffed with sandpaper, the thickness is adjusted to 0.35 mm, and the surface at the time of coagulation is raised by emery buffing to form a suede surface. Then, a suede fiber napped sheet substrate [I] was obtained.

(Finishing method) The suede-like fiber napped sheet [I] is dyed with a brown metal complex salt dye composition by a Wins dyeing machine, soaped, and then dried with hot air to obtain a brown suede-like fiber napped sheet [A]. It was

This dyed suede fiber napped sheet [A] was subjected to a soft expansion treatment under the following conditions using a tumbler type finishing machine and perchlorethylene to which a quaternary ammonium salt-based softening agent was added at a rate of 5 g / I went.

Finishing machine Permak dry cleaner Treatment conditions Solution treatment (room temperature) 3 minutes Dewatering treatment 2 minutes Rubbing cloth drying treatment (70 ° C) 35 minutes Cooling treatment 2 minutes Drying obtained Suede-like fiber napped sheet surface such as brushing After finishing, a thin suede-like sheet product [B] was obtained.

Comparative Example 1 The brown suede-like fiber napped sheet [A] obtained by dyeing in Example 1 was subjected to a rubbing treatment with a rubbing machine having a hand kneading mechanism, and then the surface was brushed to obtain a thin suede-like sheet [ C] was obtained.

Comparative Example 2 The brown suede-like fiber napped sheet [A] obtained by dyeing in Example 1 was soaped with a circular jet jet dyeing machine having a Nozzle nozzle, dried with a schoot loop dryer, and the surface was brushed. A thin suede-like sheet [D] was obtained.

Comparative Example 3 The brown suede fiber napped sheet [A] obtained by dyeing in Example 1 was dispersed in water with a quaternary ammonium salt softener at a rate of 5 g / using a tumbler type finishing machine. The dispersion was treated in the same manner as in Example 1, dried, and the surface was brushed to obtain a thin suede-like sheet [E].

Next, the performance measured on the obtained suede-like sheets [A] to [E] is shown in Table 1.

That is, the product [B] of Example 1 had a swelling feeling like natural leather and was flexible, and thus had a sufficient thickness feeling even though it was thin. On the other hand, the product of Comparative Example had a feeling of being thin and had a paper-like texture. In particular, the softening agent-treated product [E] did not sufficiently disperse the napped fibers even after brushing, and had a low apparent napped fiber density.

Example 2 A fiber entangled non-woven fabric (average basis weight 105 g / m ² ) of ultrafine fiber bundle fibers made of polyethylene terephthalate ultrafine fibers having an average single fiber fineness of 0.008 denier was added to polyester / polyether polyurethane (stress at 100% elongation 0.
A sheet having a thickness of 0.31 mm, in which one surface of a sheet-shaped substrate containing 47 kg / mm ² ) of about 20 g / m ² is finished in fiber napped suede, is browned with a dye composition containing a disperse dye and a metal complex salt dye. It was dyed, soaped, and dried to obtain a brown suede fiber napped sheet. Using trifluoroethane as the organic liquid, this suede-like fiber napped sheet was added with a cationic surfactant type softener at a rate of 3.5 g /, and treated at a liquid temperature of 30 ° C. in the same manner as in Example 1, It was dried to obtain a suede-like fiber napped sheet. The surface of this sheet was treated by brushing or the like to obtain a thin suede-like sheet [F].

This suede-like sheet [F] is a product with a thickness of 0.35 mm, an apparent density of 0.36 g / cm ³ and a swelling feeling similar to natural leather, and has excellent dyeing friction fastness and is suitable for gloves. It was suitable.

<Effects of the Invention> The fiber napped suede-like sheet of the present invention has a soft texture with a swelling sensation similar to that of natural leather even if it is thin, and has excellent nap properties, dyeing fastness, dyeing rubbing fastness, and washability. However, it is a product with good morphological stability.

Claims (2)

[Claims] 1. A substrate comprising a fiber-entangled nonwoven fabric composed mainly of ultrafine fibers having a single fiber average fineness of 0.1 denier or less and / or bundled fibers thereof, and an elastic polymer composed mainly of polyurethane. Then, when finishing a suede-like sheet in which a napped surface of ultrafine fibers is formed on at least one surface of the substrate, the suede-like sheet is treated in water or in an aqueous dye solution and dried, and then in an organic liquid that does not dissolve the constituent material of the sheet. , Processed with a processing device having a kneading mechanism,
A finishing method for a suede-like sheet, which comprises drying the treatment liquid after giving a rubbing effect. 2. A substrate comprising at least a fiber-entangled nonwoven fabric composed mainly of ultrafine fibers having an average fineness of single fiber of 0.1 denier or less and / or bundled fibers thereof, and an elastic polymer composed mainly of polyurethane. When finishing a suede-like sheet having a napped surface of ultrafine fibers on one side, the suede-like sheet is treated in water or an aqueous dye solution and dried, and then a softening agent and a softening agent are added to an organic liquid that does not dissolve the constituent materials of the sheet. At least one selected from an oil agent, a cleaning agent, and an antistatic agent is added, treated with a treatment device having a kneading mechanism, the treatment liquid is removed, and then dried while giving a kneading action. How to finish suede-like sheets.