JP6375541B2 - Laminated fabric and skin material comprising the laminated fabric - Google Patents

Description

  The present invention is a laminate in which a conductive nonwoven fabric, an adhesive layer, and a fabric are laminated, have antistatic properties and cushioning properties, and also have excellent tension and sag resistance when attached to the surface of a seat, chair, etc. The present invention relates to a skin material such as a seat or a chair made of a fabric or the laminated fabric.

  In order to increase the tension and cushioning properties of fabrics used as surface covering materials for automobile seats and office chairs, a foamed resin layer typified by a polyurethane foam layer is bonded to the back of the fabric. ing. As a method of laminating the foamed resin layer to the surface of the fabric, a method of laminating with an adhesive such as a urethane-based adhesive, and generally, by applying a flame to the surface of the foamed resin layer, the surface is burned and melted, There is a method called frame lamination which is bonded to the back surface of the fabric in a molten state, and the latter method is widely used.

  In addition, the foamed resin layer opposite to the bonded surface of the foamed resin layer to which the fabric is bonded has a woven / knitted fabric or nonwoven fabric made of fibers such as polyester and polyamide for the purpose of improving slipperiness. Often pasted together.

  However, if the fabric bonded to the foamed resin layer created in this way is not prescribed for preventing static electricity on the fabric, it tends to rub against clothes and generate static electricity. When used, static electricity accumulates in the human body of the user, making it more susceptible to electric shock and causing discomfort. Therefore, in order to prevent static electricity, a resin such as a surfactant is attached to the fabric, antistatic fibers are included in the fabric, or a conductive resin is coated on the back surface of the fabric.

  However, when a resin such as a surfactant is attached to the dough, the effect is poor when the absolute moisture content in the air is low, such as during cold weather. In addition, the method of including antistatic fibers in the fabric can be expected to have an antistatic effect without being affected by the amount of moisture in the air, but the design and design of the fabric is restricted because it is included in the fabric. Even if the conductive resin is coated on the back of the fabric, the antistatic effect can be expected without being affected by the amount of moisture in the air, but the coated conductive resin is hard and the stretchability of the fabric is impaired, depending on the shape of the chair May not be available.

  The present invention has been made to solve the above-described problems. That is, a conductive nonwoven fabric containing antistatic short fibers is used in place of the urethane foam layer, and the conductive nonwoven fabric is interposed through an adhesive layer. The purpose is to suppress the generation of static electricity. In addition, it is possible to facilitate the manufacture of a seat or a chair by having hook-type fastening and engaging force on the outer surface of the conductive nonwoven fabric constituting the laminated fabric, and further includes a polyurethane resin or a polypropylene resin in the adhesive layer, An object is to melt the adhesive layer with a flame and to bond the conductive nonwoven fabric and the cloth using the melting.

That is, the present invention
(1) A laminated fabric in which an electrically conductive nonwoven fabric, an adhesive layer, and a fabric are laminated in this order, and the electrically conductive nonwoven fabric comprises 50 to 99.5% by mass of polyester-based short fibers as non-conductive fibers, and antistatic short fibers. 0.5 to 50% by mass, and the antistatic fiber comprises carbon-containing thermoplastic polyester resin or thermoplastic polyamide resin, and a thermoplastic polyester resin or thermoplastic polyamide substantially free of carbon. A laminated fabric comprising a protective layer made of a resin;
(2) The laminated fabric according to (1), comprising 30% by mass or more of polyester-based short fibers having a polyester-based short fiber crimp ratio K of 20% to 60% as raw cotton for the conductive nonwoven fabric,
(3) The laminated fabric according to (1) or (2), wherein the nonconductive fiber is a core-sheath type composite fiber or a side-by-side type composite fiber,
(4) The laminated fabric according to (1) to (3), wherein the conductive nonwoven fabric is a needle punched nonwoven fabric,
(5) The laminated fabric according to any one of (1) to (4), wherein the resin forming the adhesive layer includes at least one of a polyurethane resin and a polypropylene resin.
(6) The laminated fabric according to (1) to (5), wherein the outer surface of the conductive nonwoven fabric has a performance of engaging with a hook-type fastener.
(7) The method for producing a laminated fabric according to (1) to (6), wherein the conductive non-woven fabric and the fabric are bonded through the adhesive layer by treating the adhesive layer with a flame,
(8) A skin material for a seat or chair comprising the laminated fabric according to (1) to ( 6 ),
I will provide a.

  The laminated fabric of the present invention has a small amount of electrification charge during friction and a decrease in thickness after applying a load for a long time, and is excellent in antistatic and cushioning properties. Further, the surface of an automobile seat, office chair, etc. When it is made of a covering material, it generates less wrinkles and grows up, so it is suitable as a top cover (skin material) including seats and chairs.

Hereinafter, the present invention will be described in detail.
The laminated fabric of the present invention has a structure in which a conductive nonwoven fabric, an adhesive layer, and a fabric are laminated in this order.
The laminated fabric of the present invention is not limited, but for example, a fabric used as a surface covering material for an automobile seat, an automobile interior door, an office chair, etc., has antistatic properties, tension and cushioning properties. Can be used as an alternative to the foamed polyurethane resin layer for backing, which is generally used conventionally.

  The conductive nonwoven fabric constituting the laminated fabric of the present invention plays a role of improving fabric tension and cushioning, and improving fabric antistatic properties. That is, when it is made into a laminated fabric rather than the fabric alone, it plays a major role in improving the cushioning and antistatic properties.

In the present invention, the conductive non-woven fabric is a part that bears the tension of the backed fabric, cushioning properties, etc. From the viewpoint of providing these performances, the conductive fabric is integrated with the fabric and the adhesive layer to form a laminated fabric. The thickness of the conductive nonwoven fabric portion is preferably 1 mm or more, more preferably 2 mm or more, and still more preferably 4 mm or more. If the thickness is less than 1 mm, the desired fabric tension and cushioning properties cannot be obtained. The upper limit of the thickness is not particularly limited, but a thickness of 15 mm or less is appropriate in consideration of easy production of a conductive nonwoven fabric and ease of sewing of the resulting laminated fabric.
The conductive nonwoven fabric has a thickness decreasing direction due to the influence of tension in each process for producing a laminated fabric, the effect of winding, and the effect of pressure bonding in the pasting process. In order to make the thickness 1 mm or more, it is preferable to have a thickness of 2 mm or more, more preferably 3 mm or more in a state before being laminated with the fabric through the adhesive layer.

Although there is no restriction | limiting in particular as a weight (weight per unit area) of an electroconductive nonwoven fabric, 50-700g / m < ² >, 80-500g / m < ² >, especially 100-300g / m < ² > are suitable when a production surface and a cost surface are considered. . The apparent density of the conductive nonwoven fabric is in the range of 0.03 to 0.08 g / cm ³ , particularly 0.04 to 0.00 in terms of easy compatibility between cushioning properties, shape stability, and strength characteristics. A range of 06 g / cm ³ is preferred.

  In the present invention, it is important that polyester-based short fibers are contained in the conductive non-woven fabric in that there is little sag (decrease in bulk) and high cushioning properties can be obtained.

  As long as the utility of the present invention is exhibited, the type of resin constituting the polyester short fiber is not limited. However, in terms of sag resistance, cushioning properties, availability of procurement, economic efficiency, etc., polyethylene terephthalate The most preferred examples are resin, polytrimethylene terephthalate resin, polybutylene terephthalate resin, or copolymer polyester resin having these as main repeating units. As a constituent resin of these polyester fibers, a polyester resin recovered from a plastic bottle or waste plastic may be used from the viewpoint of effective utilization of resources in consideration of the environment. Further, it may be a short fiber obtained from a non-petroleum polyester resin such as polylactic acid.

  It is important that the polyester short fiber content in the conductive nonwoven fabric is in the range of 50 to 99.5% by mass because it is easy to reduce sag and secure cushioning properties. A more preferable range of the polyester short fiber content is 80 to 99.5% by mass, and a particularly preferable range is 90 to 99.5% by mass.

  As short fibers constituting the conductive nonwoven fabric, in addition to polyester short fibers, synthetic fibers such as polyamide and polyolefin, chemical fibers represented by rayon, natural short fibers such as cotton, hemp, wool, etc. It may be included to such an extent that the effect of is not impaired. Moreover, the used short fiber may be colored with a pigment, dye, or the like.

  The fineness (thickness) and fiber length of the polyester-based short fibers used for the conductive nonwoven fabric are not particularly limited, but the fineness ranges from 1 to 20 dtex (hereinafter sometimes referred to as dtex). More preferably, it is in the range of 1.5-15 dtex, most preferably in the range of 2-11 dtex, and the fiber length is preferably in the range of 15-100 mm, more preferably in the range of 20-80 mm, most preferably 25-60 mm. Range.

  Among them, as a fiber constituting the conductive non-woven fabric, a polyester-based short fiber raw cotton having a crimp rate K of 20% to 60% is provided from the viewpoint of imparting uniformity and bulkiness, further sag resistance and cushioning properties. It is preferred to use. More preferably, 20 to 99.5% by mass of polyester short fibers having a crimp rate K of 25 to 50% based on the total mass of the fibers constituting the conductive nonwoven fabric is used. Further, it is preferable in terms of obtaining cushioning properties and sag resistance.

Here, the crimping rate K means that the number of short fibers before heat treatment is 50-100 dtex in thickness and the length of the short fibers is measured by applying a load of 0.1 g per 10 dtex (L1). The fiber bundle is dry heat-treated at 180 ° C. for 15 minutes, and then the fiber length is measured under the same load (L2). Then, the crimp rate K is obtained by the following equation.
Crimp rate K (%) = (L1-L2) / L1 × 100

  Such polyester staple fibers having a crimp rate K of 20% to 60% can be obtained by specifically increasing the crimp rate and the number of crimps applied when producing the staple fibers. Furthermore, it is manufactured by composite spinning of two types of polyester resins having different shrinkage ratios so as to have a side-by-side cross section. When polyester short fibers having a crimp rate K of 20% to 60% are used as the raw cotton of the conductive nonwoven fabric, the fineness is preferably in the range of 1.5 to 20 dtex, and particularly preferably in the range of 2 to 11 dtex. If the crimp ratio K is less than 20%, a bulky conductive nonwoven fabric cannot be obtained, and the cushioning properties and the settling resistance of the resulting laminated fabric are also inferior. If the crimp rate K exceeds 60%, the thermal shrinkage rate is large, and the resulting laminated fabric is not preferable because it has a hard cushioning property.

  In the conductive nonwoven fabric constituting the laminated fabric of the present invention, the content of the antistatic short fibers in the conductive nonwoven fabric is 0.5 to 50% by mass. When making conductive non-woven fabrics by blending, it has uniformity of antistatic short fibers in the non-woven fabric, sufficient uniformity of antistatic effect, and secures cushioning and economical efficiency of the resulting laminated fabric Is important to do.

  In the present invention, the antistatic short fibers constituting the conductive nonwoven fabric are not limited as long as the utility of the invention is exhibited, but a conductive layer made of a thermoplastic polyester resin containing carbon or a thermoplastic polyamide resin. And a protective layer made of a thermoplastic polyester resin or a thermoplastic polyamide resin substantially free of carbon, the antistatic properties of the antistatic short fiber and the stability when producing the antistatic short fiber are It is preferably adopted in order to achieve both.

About carbon content contained in a conductive layer, it is 20-40 mass%, Preferably it is 25-35 mass%. When the carbon content is less than 20% by mass, the conductivity as intended by the present invention cannot be obtained, and the sufficient static elimination performance is not exhibited, which is not preferable. On the other hand, when it exceeds 40 mass%, the strength characteristics of the antistatic short fiber are lowered, which is not preferable. As carbon in a conductive layer, well-known things, such as conductive carbon black, can be used, and acetylene black, oil furnace black, thermal black, channel black, ketjen black and the like are exemplified. Among these, conductive carbon black is preferably used, and one having a specific electric resistance of 10 ⁻³ to 10 ³ Ω · cm is more preferable.

  Examples of the thermoplastic polyester resin used for the conductive layer include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4′-dicarboxydiphenyl, and 5-sodium sulfoisophthalic acid. Acids; Dicarboxylic acid components such as aliphatic dicarboxylic acids such as azelaic acid and sebacic acid; and aliphatic diols such as ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, polyethylene glycol, and polytetramethylene glycol; bisphenol A Or an aromatic diol such as an ethylene oxide adduct of bisphenol S; a fiber-forming polyester formed using a diol component such as an alicyclic diol such as cyclohexanedimethanol; and polybutylene terephthalate. Examples of such a resin can be mentioned. Moreover, it is preferable from the point of practical durability that melting | fusing point of resin which comprises a conductive layer is 200 degreeC or more.

  Examples of the thermoplastic polyamide resin used for the conductive layer include nylon 12, nylon 11, nylon 6, nylon 66, nylon elastomer, and the like.

  The mass ratio of the conductive layer is preferably 15 to 50 mass% with respect to the mass of the antistatic short fiber. If it exceeds 50% by mass, the spinnability when spinning the antistatic yarn that is the raw material of the antistatic short fiber tends to be lowered, and the spun yarn and the stretched yarn frequently occur. If it is less than 15% by mass, variations in the antistatic properties of the antistatic short fibers are not preferable.

  The protective layer is a fiber because it is easy to maintain long-term durability performance without maintaining good processability of the antistatic yarn that is the raw material of the antistatic short fiber and without causing interface peeling with the conductive layer. Formable thermoplastic polyester resins and thermoplastic polyamide resins can be used.

  Examples of the thermoplastic polyester resin used in the protective layer include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, naphthalene-2,6-dicarboxylic acid, 4,4′-dicarboxydiphenyl, and 5-sodium sulfoisophthalic acid. Acids; Dicarboxylic acid components such as aliphatic dicarboxylic acids such as azelaic acid and sebacic acid; and aliphatic diols such as ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, polyethylene glycol, and polytetramethylene glycol; bisphenol A Examples thereof include fiber-forming polyesters formed using diol components such as aromatic diols such as ethylene oxide adducts of bisphenol S and cycloaliphatic dimethanol. Among these, polyesters containing ethylene terephthalate units and butylene terephthalate units, which are general-purpose polyesters, are 80 mol% or more, preferably 90 mol% or more, and modified polyesters containing a small amount of a third component can also be used. is there.

  Specific examples of the thermoplastic polyamide resin used in the protective layer include nylon 12, nylon 11, nylon 6, nylon 66, and nylon elastomer. Further, these may contain a small amount of additives, fluorescent whitening agents, stabilizers and the like.

  As the thermoplastic polyester resin and the thermoplastic polyamide resin, those having good melt viscosity characteristics when fiberized and having excellent fiber properties and heat resistance are preferably employed. Among these, nylon 6 is preferable in terms of fiberizing process properties, fiber properties, and durability in the case of polyethylene terephthalate polyester and polyamide.

The single yarn fineness of the antistatic short fiber is preferably 2 to 20 dtex from the viewpoints of ease of blending, carding properties, etc., and the fiber length is preferably 15 to 80 mm from the viewpoint of carding properties.

The electrical resistance value of the antistatic short fiber as a single yarn is not limited as long as the laminated fabric satisfies the desired performance, but is preferably 1 × 10 ⁹ Ω / cm or less.

Furthermore, the conductive nonwoven fabric has a single fiber unit in which the whole or a part of the single fiber unit melts at 180 ° C. or less, more preferably 150 to 180 ° C. It is particularly preferable that the conductive non-woven fabric contains 15 to 30% by mass and is heat-treated in terms of improvement in sag resistance and cushioning properties of the conductive non-woven fabric. Moreover, it is preferable also when it becomes easy to obtain a high engagement force, when the surface on the opposite side to the contact bonding layer of an electroconductive nonwoven fabric has engagement performance with a hook type fastener.
A preferable example of the fiber that melts at a temperature of 180 ° C. or lower as a whole of the single fiber unit is a polyester fiber made of a copolyester having a melting temperature of 180 ° C. or lower as a whole, but is not limited thereto.
In the case where fibers that melt at a temperature of 180 ° C. or less are used for the conductive nonwoven fabric, those having a fineness of 1 to 20 dtex are preferred, and those having a fiber length in the range of 15 to 80 mm are preferred. Considering the heat-fusibility with the polyester-based fibers that are the non-woven fabric constituting main fibers, it is preferable that the main fibers are composed of a polyester-based resin having the same repeating unit as the main fibers.

  On the other hand, as a preferable example of a fiber in which a part of a single fiber melts at 180 ° C. or less, for example, a resin in which a sheath component is melted at 180 ° C. or less in a core-sheath type composite fiber, and which constitutes a core component However, a composite fiber composed of a resin having a melting temperature higher than the melting temperature of the resin constituting the sheath component, a resin melting at 180 ° C. or less, and a resin having a melting temperature higher than the resin are side by side. A composite fiber in which a part or the entire surface of the fiber is covered with a resin that melts at 180 ° C. or lower, such as a composite fiber that exists, applies to this, and is generally a fiber called a binder fiber. In the composite fiber, the resin constituting the core component of the core-sheath type composite fiber and the resin constituting the side of the high melting temperature of the side-by-side type composite fiber are resins that do not melt at 180 ° C. It is preferable in terms of properties, and a resin that does not melt even at 210 ° C. or higher is particularly preferable.

  In the core-sheath type composite fiber or side-by-side type composite fiber, the resin that melts at 180 ° C. or less is preferably a polyester resin having a melting point lowered by copolymerization. The resin having a higher melting temperature than the resin that melts at 180 ° C. or lower is substantially not copolymerized, or even when copolymerized, the proportion of copolymerization is higher than that of the resin that melts at 180 ° C. or lower. Less polyester resin is preferred. When using a binder fiber in which a part of the fiber melts at 180 ° C. or lower, the fineness is preferably in the range of 1 to 20 dtex. In addition, when the binder fiber is used as a part of the nonwoven fabric constituting fiber, the resin that melts at 180 ° C. or lower is considered to be a resin that is melted at 180 ° C. or less in consideration of the heat fusion property with the polyester fiber that is the principal fiber constituting the nonwoven fabric. A polyester resin having the same repeating unit as the main unit is preferred.

  In particular, when such a core-sheath type composite fiber is used as a part of the fiber constituting the conductive nonwoven fabric and a fiber satisfying the above crimp rate is used, for example, a core-sheath type composite fiber or When the side-by-side type composite fiber is 20 to 90% by mass of the total fibers constituting the conductive nonwoven fabric, and the fibers having the above-mentioned crimp rate are 10 to 40% by mass of the total fibers constituting the conductive nonwoven fabric. The conductive nonwoven fabric and the laminated fabric obtained are particularly preferable because they are extremely rich in cushioning properties, and such cushioning properties are retained even after long-term use and do not sag. The side-by-side type composite fiber is manufactured using a resin that melts at 180 ° C. or less as one component, and one that satisfies the above crimp rate K can also be used.

  In addition, when using the fiber which melts by dry heat of 180 degrees C or less as a binder component, it heat-processes the conductive nonwoven fabric containing the said short fiber, but this binder component will be melted and a binder effect will be expressed. The heat treatment temperature is preferably not less than the temperature at which the binder component melts and not more than the melting temperature plus 30 ° C.

  Examples of the method for producing a conductive nonwoven fabric include a method in which a short fiber web is produced by carding, and the web is entangled and fixed with a water flow, a needle punch, a binder resin or the like.

As described above, as a method for fixing fibers used in the conductive nonwoven fabric, water flow, needle punch, binder treatment, etc. are generally used. In particular, in order to obtain a conductive nonwoven fabric having a thickness of 2 mm or more, needle punch Is advantageous and preferable in terms of confounding. As the needle punch condition, it is preferable to adopt a needle stick density condition of about 10 to 500 / cm ² .

  In addition, a fixing method using a binder such as a binder resin and a binder fiber is also preferably employed. As a specific example of the binder resin and the binder fiber, a core containing an acrylic adhesive or a resin that dissolves at 180 ° C. or less as described above. A binder fiber made of a composite fiber such as a sheath-type composite fiber or a side-by-side type composite fiber can be used, but since a uniform and strong fixation can be obtained, a core-sheath type composite fiber containing a resin that melts at 180 ° C. or less It is preferable to use a binder fiber made of a composite fiber such as a side-by-side type composite fiber. Of course, you may employ | adopt the method of using two or more of these fixing methods, for example, a binder fiber, and using a needle punch method together.

  In the present invention, the conductive nonwoven fabric may be manufactured so that the surface opposite to the adhesive layer has engagement with the hook-type fastener. Conventionally, as a method of fixing the fabric etc. to the urethane foam etc., the method of fixing with an adhesive or a wire etc. was general, but the problem that it becomes very difficult to re-attach the fabric to the urethane foam or re-seat was there. For example, a hook-type fastener is attached to urethane foam, and a laminated fabric having engagement with the hook-type fastener on the outer surface of the conductive nonwoven fabric and a hook-type fastener mounting portion of the urethane foam are provided. By engaging, the laminated fabric can be easily fixed. Moreover, according to the said method, it becomes possible to perform re-paste and re-laying of a laminated fabric easily.

  In order to manufacture a conductive nonwoven fabric having an engagement function with a hook-type fastener on the outer surface, for example, the conductive nonwoven fabric obtained by the needle punch method is pushed in the warp direction or the weft direction, and the conductive nonwoven fabric is pushed. It can be obtained by forming a loop shape by punching with a needle in the state, creating a loop by projecting with a protrusion from the side in contact with the adhesive layer of the conductive nonwoven fabric, The method is not particularly limited.

  The raw cotton used for the uneven surface is preferably a fineness of 1.5 dtex or more from the viewpoint of strong engagement, and more preferably 2.0 dtex or more. Moreover, the raw fiber used as a whole is 180 ° C. or less, more preferably 10% by mass or more, more preferably 10 to 40% by mass of the total fiber, and particularly preferably 10% to 40% by mass of the total fiber. It is preferable that it is composed of short fibers containing 15 to 30% by mass and finally subjected to heat treatment in terms of strengthening the engagement.

  The engaging property as the laminated fabric is, for example, preferably 0.5 N / cm or more, more preferably 1 N / cm or more in terms of engaging force (JIS L3416) with the hook-type fastener A8693 (manufactured by Kuraray Fastening).

  The laminated fabric of the present invention has an adhesive layer. The adhesive layer serves to bond the conductive nonwoven fabric and the fabric through the adhesive layer and to laminate the conductive nonwoven fabric and the fabric.

The material constituting the adhesive layer is not limited as long as it is a material having adhesiveness to the cloth and does not impair the effect of the laminated fabric of the present invention.
It may be a material having an adhesive ability by a curing reaction or the like at room temperature, or a material having an adhesive ability by being solidified after being melted at a high temperature.

  As a material constituting the adhesive layer, a resin having an adhesive ability by applying heat may be used. Specifically, for example, bonding a conductive nonwoven fabric and a fabric using a hot-melt adhesive made of polyurethane resin or acrylic resin is easy to obtain the adhesive, adhesive performance, and further after adhesion It is preferably employed from the viewpoint of chemical stability.

  Alternatively, the adhesive layer may be a sheet-like structure made of polypropylene resin, and a conductive nonwoven fabric and the sheet-like structure made of polypropylene resin are laminated to form a laminated sheet for pasting the fabric, and further the fabric back The laminated sheet may be heat-treated to bring the polypropylene resin surface of the laminated sheet for pasting the fabric and the fabric into contact with each other to form a laminated fabric. The sheet-like structure made of polypropylene resin is preferably a non-woven fabric or knitted fabric made of polypropylene fibers. As a method for heat-treating the laminated sheet for dough backing, a method for treating the polypropylene resin surface of the laminated sheet for dough backing with a flame may be employed.

  As a specific example of a preferable manufacturing method in the case where a sheet-like structure made of polypropylene resin is used as an adhesive layer, the adhesive layer is a nonwoven fabric made of polypropylene fibers, and the nonwoven fabric made of polypropylene fibers and a conductive nonwoven fabric A laminated sheet for backing the fabric is formed by laminating by a method such as a needle punch method, and the surface of the nonwoven fabric made of polypropylene fibers as the adhesive layer is fused by a flame, and the fabric is bonded while the adhesive layer is fused. The method of pasting together with a back surface is mentioned.

There are no particular restrictions on the strength of the bonding, but in order to prevent peeling during the subsequent sewing process or when installed on a chair, or peeling during use as a product such as a chair, the peel strength of the laminated fabric The thickness is preferably 1 to 10 N / cm in accordance with JIS L3416. In addition, a frame lamination method can be performed particularly efficiently as the method. The frame lamination method here is a method in which the surface of the adhesive layer is melted by a flame without using an adhesive, and is bonded to a cloth or a conductive nonwoven fabric while being melted.
When the frame lamination method is employed, the resin constituting the adhesive layer is preferably a polyurethane resin or a polypropylene resin.

  In order to laminate a woven or knitted fabric or nonwoven fabric made of polypropylene resin or polyurethane resin as the adhesive layer on the adhesive surface of the conductive nonwoven fabric, create the conductive nonwoven fabric and the adhesive layer separately, and use a binder for each. It can be obtained by a method of bonding, a method of laminating a conductive nonwoven fabric and an adhesive layer, needle punching from the conductive nonwoven fabric side, and tangling the short fibers constituting the conductive nonwoven fabric with the adhesive layer.

Examples of the fabric to be bonded to the conductive nonwoven fabric in the laminated fabric of the present invention include knitted fabrics including moquettes and velvet, raschel and tricot warp knitted fabrics, and weft knitted fabrics such as circular knitted fabrics. Further, it may be synthetic leather in which polyurethane resin or vinyl chloride resin is present on the surface of the nonwoven fabric or woven or knitted fabric, or may be natural leather.
The fabric may be bonded to the surface on one side of the conductive nonwoven fabric, or may be bonded to the surfaces on both sides of the conductive nonwoven fabric.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this does not restrict | limit the scope of the present invention. In addition, the physical property evaluation in each example was performed by the method shown below.

(Thickness)
After arbitrarily taking three photographs in the thickness direction of the sample side surface, the thickness was determined from the photograph obtained by enlarging the photograph, and the average value was taken as the thickness value.

(Antistatic)
Measured according to JIS L1094 triboelectric charge measurement method.

(Engagement with fastener)
Engagement with Kuraray hook type surface fastener A8693Y was measured according to JIS L3416.

(Occurrence of wrinkles)
When the laminated fabric is used as an upholstery (skin material) for office chairs and automobile seats, the presence or absence of wrinkles is visually evaluated by three people. When two or more people judge that there is no wrinkles, There was no occurrence. "

(Swelling)
When the laminated fabric is used as an upholstery (skin material) for office chairs and automobile seats, the presence or absence of a sense of tension is visually evaluated by three people, and two or more people are judged to have “tension”. There is a great strength. ”

(Cushioning)
When three evaluators are seated on an office chair and an automobile seat with a laminated fabric as an upholstery (skin material), and two or more judges as “cushioning”, “excellent cushioning” did.

(Settling)
When a 400 MPa load is applied to an office chair with a laminated fabric as an upholstery (skin material) for 5 hours and the thickness after removing the load is 80% or more of the thickness before the load is applied, Not. "

Example 1
1% by mass of antistatic short fiber having a fineness of 5.5 dtex, a fiber length of 51 mm, and a single yarn electric resistance of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of A web was prepared with a card using 99% by mass of 25% short polyethylene terephthalate fibers, and then a nonwoven fabric having a basis weight of 200 g / m ² and a thickness of 4.0 mm was obtained by an entanglement method using a needle punch.
When the conductive nonwoven fabric is bonded to the back of the polyester fiber circular knitted fabric, which is a fabric, via a urethane adhesive as an adhesive layer, the thickness of the conductive nonwoven fabric portion in the state of the laminated fabric is 4.0 mm. there were.
Then, when the outer surface of the fabric side of the resulting laminated fabric was measured antistatic triboelectrically charge meter, friction cloth Acrylic 0.7 C / m ^2, a frictional cloth nylon at 0.5 C / m ² Excellent anti-static properties and good cushioning properties.
Further, when the obtained laminated fabric is used as an upholstery (skin material) for an office chair and an automobile seat so that the fabric side of the laminated fabric is the outer surface, there is no generation of wrinkles, and the cushion is swelled. It was excellent in properties and did not sag.

Example 2
40% by mass of antistatic short fibers having a fineness of 5.5 dtex, a fiber length of 51 mm, and an electric resistance value of a single yarn of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of After producing a web with a card using 60% by mass of 25% polyethylene terephthalate short fibers, a conductive nonwoven fabric having a basis weight of 220 g / m ² and a thickness of 4.0 mm was obtained by an entanglement method using a needle punch.
When the conductive nonwoven fabric is bonded to the back of the polyester fiber circular knitted fabric, which is a fabric, via a urethane adhesive as an adhesive layer, the thickness of the conductive nonwoven fabric portion in the state of the laminated fabric is 3.8 mm. there were.
And when the antistatic property was measured for the outer surface on the fabric side of the obtained laminated fabric by measuring the triboelectric charge amount, the friction fabric acrylic was 0.4 μC / m ² and the friction fabric nylon was 0.4 μC / m ² . Excellent anti-static properties and good cushioning properties.
Further, when the obtained laminated fabric is used as an upholstery (skin material) for an office chair and an automobile seat so that the fabric side of the laminated fabric is the outer surface, there is no generation of wrinkles, and the cushion is swelled. It was excellent in properties and did not sag.

Comparative Example 1
0.1 mass% of antistatic short fibers having a fineness of 5.5 dtex, a fiber length of 51 mm, and an electric resistance of a single yarn of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate After producing a web with a card using 99.9% by mass of polyethylene terephthalate short fibers with 25% K, a conductive nonwoven fabric having a basis weight of 200 g / m ² and a thickness of 4.0 mm was obtained by an entanglement method using a needle punch. .
When the conductive nonwoven fabric is bonded to the back of the polyester fiber circular knitted fabric, which is a fabric, via a urethane adhesive as an adhesive layer, the thickness of the conductive nonwoven fabric portion in the state of the laminated fabric is 4.0 mm. there were.
Then, when the outer surface of the fabric side of the resulting laminated fabric was measured antistatic triboelectrically charge meter, friction cloth acrylic 10.1μC / m ^2, a frictional cloth nylon with 11.3μC / m ² The antistatic property was poor.

Comparative Example 2
60% by mass of antistatic short fibers having a fineness of 5.5 dtex, a fiber length of 51 mm, and a single yarn electrical resistance of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of A web was prepared by a card using 40% by mass of 25% polyethylene terephthalate short fibers, and then a conductive nonwoven fabric having a basis weight of 215 g / m ² and a thickness of 3.2 mm was obtained by an entanglement method using a needle punch.
When the conductive nonwoven fabric is bonded to the back of the polyester fiber circular knitted fabric, which is a fabric, via a urethane adhesive as an adhesive layer, the thickness of the conductive nonwoven fabric portion in the state of the laminated fabric is 2.9 mm. there were.
Then, when the antistatic property of the outer surface of the obtained laminated fabric on the fabric side was measured by measuring the amount of triboelectric charge, the friction fabric acrylic was 0.5 μC / m ² and the friction fabric nylon was 0.3 μC / m ² . The antistatic property was excellent.
However, when the obtained laminated fabric is used as an upholstery (skin material) for an office chair and an automobile seat so that the fabric side of the laminated fabric is the outer surface, there is no generation of wrinkles, but the cushion is swelled. It became inferior.

Example 3
1% by mass of antistatic short fiber having a fineness of 5.5 dtex, a fiber length of 51 mm, and a single yarn electric resistance of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of A web was prepared by a card using 99% by mass of 25% polyethylene terephthalate short fibers, and then a conductive nonwoven fabric having a basis weight of 200 g / m ² and a thickness of 4.0 mm was obtained by an entanglement method using a needle punch. On the other hand, a polypropylene spunbonded non-woven fabric (thin non-woven fabric) having a thickness of 0.2 mm and a basis weight of 20 g / m ² is overlapped with the conductive non-woven fabric and integrated by needle punching from the conductive non-woven fabric side. Then, a laminated nonwoven fabric for backing a cloth in which a layer made of a conductive nonwoven fabric having a thickness of 3.8 mm and an adhesive layer made of a spunbond nonwoven fabric made of polypropylene having a thickness of 0.2 mm were laminated was obtained.
Subsequently, the outer surface on the polypropylene spunbond nonwoven fabric side of the laminated nonwoven fabric for backing the fabric and the polyester fiber circular knitted fabric backing as a fabric were bonded together by a frame lamination process to obtain a laminated fabric. The thickness of the conductive nonwoven fabric portion in the state of the laminated fabric was 3.3 mm.
Then, the antistatic property of the outer surface of the obtained laminated fabric on the fabric side was measured by measuring the triboelectric charge amount, and as a result, the friction fabric acrylic was controlled at 0.6 μC / m ² and the friction fabric nylon was controlled at 0.6 μC / m ² . It was excellent in electrical properties.
Further, when the obtained laminated fabric is used as an upholstery (skin material) for an office chair and an automobile seat so that the fabric side of the laminated fabric is the outer surface, there is no generation of wrinkles, and the cushion is swelled. It was excellent in properties and did not sag.

Example 4
1% by mass of antistatic short fiber having a fineness of 5.5 dtex, a fiber length of 51 mm, and a single yarn electric resistance of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of After producing a web with a card using 99% by mass of 25% polyethylene terephthalate short fibers, entanglement by needle punching is performed, and then, from the surface to be bonded to the fabric so that the heel is in the weft direction, The ridges are continuously projected in the warp direction with 1 mm × 2 mm convex protrusions arranged in a line in the weft direction, then entangled with a needle punch, and the basis weight is 200 g / m ² and the thickness is 4.0 mm. A conductive nonwoven fabric was obtained.
Subsequently, the surface opposite to the side having the wrinkles of the obtained conductive nonwoven fabric and the back of the polyester fiber circular knitted fabric, which is the fabric, are bonded together with a urethane adhesive as an adhesive layer. A laminated fabric was obtained. The thickness of the conductive nonwoven fabric portion in the state of the laminated fabric was 4.0 mm. Further, the engagement with Kuraray hook type surface fastener A8693Y was 3.1 N / cm.
Then, with the resulting friction cloth acrylic was measured antistaticity fabric side of the outer surface of the laminated fabric by the frictional charge amount measured 0.7 C / m ^2, control in 0.6μC / m ² by friction cloth Nylon It was excellent in electrical properties.
Further, the outer surface of the obtained laminated fabric on the conductive nonwoven fabric side is engaged with urethane foam having a Kuraray hook-type hook-and-loop fastener A8693Y on the entire surface and used as an office chair upholstery (skin material). It did not generate wrinkles and was strong, and it had excellent cushioning properties and did not sag.

Example 5
1% by mass of antistatic short fiber having a fineness of 5.5 dtex, a fiber length of 51 mm, and a single yarn electric resistance of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of After making a web with a card using 99% by mass of 25% polyethylene terephthalate short fibers, the web is entangled with a needle punch, and then the surface on the opposite side from the surface to be bonded to the fabric so that the heel is in the weft direction In addition, 1 mm × 2 mm convex protrusions arranged in a line in the weft direction are continuously projected in the meridian direction, and then entangled with a needle punch, further entangled with a basis weight of 200 g / m ² and a thickness of 4. A 0 mm conductive nonwoven fabric was obtained.
Subsequently, a thin polypropylene spunbonded non-woven fabric having a thickness of 0.2 mm and a basis weight of 20 g / m ² as an adhesive layer is opposite to the side having the conductive non-woven fabric ridges. Laminate for backing the fabric consisting of a bulky nonwoven fabric layer with a thickness of 3.8 mm and an adhesive layer with a thickness of 0.2 mm. A nonwoven fabric was obtained.
Furthermore, the outer surface on the polypropylene spunbonded nonwoven fabric side of the laminated nonwoven fabric for backing the fabric and the polyester fiber circular knitted fabric backing as the fabric were bonded together by a frame lamination process to obtain a laminated fabric. The thickness of the conductive nonwoven fabric layer in the laminated fabric was 3.5 mm. Further, the engagement with Kuraray hook type surface fastener A8693Y was 3.1 N / cm.
Then, the antistatic property of the outer surface of the obtained laminated fabric on the fabric side was measured by measuring the triboelectric charge amount. As a result, the friction fabric acrylic was controlled at 0.8 μC / m ² and the friction fabric nylon was controlled at 0.6 μC / m ² . It was excellent in electrical properties.
Further, the outer surface of the obtained laminated fabric on the conductive nonwoven fabric side is engaged with urethane foam having a Kuraray hook-type hook-and-loop fastener A8693Y mounted on the entire surface and used as an office chair upholstery (skin material). It did not generate wrinkles and was strong, and it had excellent cushioning properties and did not sag.

Example 6
3% by mass of antistatic short fibers having a fineness of 5.5 dtex, a fiber length of 51 mm, and an electric resistance value of a single yarn of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of Copolymer polyethylene terephthalate resin, core having 67% by mass of 25% short polyethylene terephthalate fiber, fineness of 2.8 dtex, fiber length of 51 mm, crimp rate K of 35%, and sheath component melting at 160 ° C. Using 30% by mass of core-sheath type composite polyester short fiber composed of non-copolymerized polyethylene terephthalate resin, a web was prepared with a card, entangled with a needle punch, and then heat treated with hot air at 180 ° C. A conductive nonwoven fabric having a basis weight of 200 g / m ² and a thickness of 4.8 mm was obtained.
Subsequently, the conductive nonwoven fabric was bonded to the back of the polyester fiber circular knitted fabric as a fabric with a urethane adhesive to obtain a laminated fabric. The thickness of the conductive nonwoven fabric portion of the obtained laminated fabric was 4.8 mm.
And when the antistatic property was measured for the outer surface on the fabric side of the obtained laminated fabric by measuring the triboelectric charge amount, the friction fabric acrylic was 0.6 μC / m ² and the friction fabric nylon was 0.5 μC / m ² . The antistatic property was excellent.
In addition, when the laminated fabric obtained is used as an upholstery (skin material) for office chairs and automobile seats, it does not generate wrinkles and has good tension, excellent cushioning properties, and occurrence of sag. It was not.

Example 7
3% by mass of antistatic short fibers having a fineness of 5.5 dtex, a fiber length of 51 mm, and an electric resistance value of a single yarn of 1 × 10 ⁸ Ω / cm, a fineness of 3.3 dtex, a fiber length of 51 mm, and a crimp rate K of Copolymer polyethylene terephthalate resin, core having 67% by mass of 25% short polyethylene terephthalate fiber, fineness of 2.8 dtex, fiber length of 51 mm, crimp rate K of 35%, and sheath component melting at 160 ° C. Using a core-sheath composite polyester short fiber 30% by mass composed of non-copolymerized polyethylene terephthalate as a component, a web was prepared with a card, and then entangled with a needle punch, and subsequently, the wrinkles were in the weft direction. On the opposite side from the surface to be bonded to the fabric, a ridge is made by continuously protruding in the warp direction with 1 mm × 2 mm convex protrusions arranged in a line in the weft direction. Further entangled in Ji, basis weight 200 g / ^{m 2} was heat treated with hot air at 180 ° C., to obtain a conductive nonwoven fabric having a thickness of 5.8 mm.
Furthermore, when the surface on the opposite side of the conductive nonwoven fabric having the folds and the back of the polyester fiber circular knitted fabric, which is the fabric, are bonded together as an adhesive layer via a urethane adhesive, The thickness of the conductive nonwoven fabric portion of the obtained laminated fabric was 5.5 mm. Further, the engagement with the Kuraray hook type surface fastener A8693Y was 4.2 N / cm.
Then, the antistatic properties of the outer surface of the obtained laminated fabric on the fabric side were measured by measuring the triboelectric charge amount. As a result, the friction fabric acrylic was controlled at 0.5 μC / m ² and the friction fabric nylon was controlled at 0.6 μC / m ² . It was excellent in electrical properties.
Further, the outer surface of the obtained laminated fabric on the side of the conductive nonwoven fabric was engaged with foamed urethane fitted with Kuraray hook type surface fastener A8693Y, and used as an office chair upholstery (skin material). However, there was no generation of wrinkles, and the fabric was strong and excellent in cushioning properties.

  Since the laminated fabric of the present invention is excellent in antistatic properties and cushioning properties and has good tension, it can be used effectively as an upholstery or skin material for office chairs and automobile seats. In addition, a seat or a chair on which the fabric constituting the laminated fabric is a surface has excellent cushioning properties and has little sag, and is suitable as a seat for a passenger car, a chair for office use or a home use.

Claims (8)

  A laminated fabric in which a conductive nonwoven fabric, an adhesive layer, and a fabric are laminated in this order, wherein the conductive nonwoven fabric is 50 to 99.5% by mass of polyester-based short fibers and 0.5% of antistatic short fibers as non-conductive fibers. The antistatic short fiber contains ~ 50% by mass, and the antistatic fiber comprises a conductive layer made of a thermoplastic polyester resin or thermoplastic polyamide resin containing carbon, and a thermoplastic polyester resin or thermoplastic polyamide resin substantially free of carbon. A laminated fabric comprising a protective layer.   The laminated fabric according to claim 1, wherein 30% by mass or more of polyester-based short fibers having a polyester-based short fiber crimp ratio K of 20% to 60% are used as raw cotton for the conductive nonwoven fabric.   The laminated fabric according to claim 1 or 2, wherein the non-conductive fiber is a core-sheath type composite fiber or a side-by-side type composite fiber.   The laminated fabric according to any one of claims 1 to 3, wherein the conductive nonwoven fabric is a needle punched nonwoven fabric.   The laminated fabric according to any one of claims 1 to 4, wherein the resin forming the adhesive layer contains at least one of a polyurethane resin and a polypropylene resin.   The laminated fabric according to any one of claims 1 to 5, wherein an outer surface of the conductive nonwoven fabric has an ability to engage with a hook-type fastener.   The method for producing a laminated fabric according to any one of claims 1 to 6, wherein the conductive non-woven fabric and the fabric are bonded through the adhesive layer by treating the adhesive layer with a flame. The skin material of the seat or chair which consists of a laminated fabric of any one of Claims 1-6 .