JP2012184520A - Infrared ray shielding fabric and textile product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an infrared ray shielding fabric that has an excellent infrared ray shielding property and also has excellent air permeability and wearing comfort, and a textile product using the infrared ray shielding fabric.SOLUTION: The infrared ray shielding fabric is obtained by partially depositing a resin comprising an infrared ray reflecting agent such as titanium oxide on at least one side of the base fabric. Then, the textile product such as a sportswear is obtained by using the infrared ray shielding fabric as need arises.

Description

  The present invention relates to an infrared shielding fabric having not only excellent infrared shielding properties but also excellent breathability and wearing comfort, and a textile product using the infrared shielding fabric.

Conventionally, as an infrared shielding fabric that shields infrared rays, a fabric in which a resin layer containing an infrared reflector is laminated on one side of a base fabric has been proposed (for example, see Patent Document 1).
However, such a fabric has excellent infrared shielding properties, but has a problem that it is not sufficient in terms of air permeability and wearing comfort.

JP 2008-31599 A

  The present invention has been made in view of the above-mentioned background, and an object thereof is to use an infrared shielding cloth having not only excellent infrared shielding properties but also excellent breathability and wearing comfort, and the infrared shielding cloth. It is to provide a textile product.

The inventor has not only excellent infrared shielding properties but also excellent breathability and wearing comfort by partially attaching a resin containing an infrared reflecting agent on at least one surface of a base fabric. The inventors have found that a shielding fabric can be obtained, and have made further investigations and completed the present invention.
Thus, according to the present invention, there is provided “an infrared shielding cloth characterized in that a resin containing an infrared reflecting agent is partially attached on at least one surface of a base cloth”.

  In that case, the ratio of the area of the resin adhering portion (hereinafter sometimes simply referred to as “adhering portion”) to the entire area of the base fabric piece surface to which the resin is adhering is within a range of 10 to 70%. preferable. Moreover, it is preferable that the said infrared reflective agent is a titanium oxide. Moreover, it is preferable that the particle diameter of the said infrared reflective agent exists in the range of 0.3-3.0 micrometers. Moreover, it is preferable that the said base fabric contains the polyester multifilament whose single yarn fineness is 0.9 dtex or less and whose number of filaments is 60 or more. In that case, it is preferable that the said polyester multifilament is false twist crimped yarn. Moreover, it is preferable that the said base fabric is water-repellent and / or calendered. Moreover, it is preferable that the base fabric is subjected to sweat absorption processing.

In the infrared shielding cloth of the present invention, the average infrared reflectance at a wavelength of 700 to 1400 nm is preferably 48% or more. The air permeability is preferably 0.2 cc / cm ² · sec or more.
Moreover, according to the present invention, sportswear, outdoor wear, raincoat, men's clothing, women's clothing, work clothes, and the like, wherein the infrared shielding cloth is used such that the surface to which the resin is attached is located on the human body side, Any textile product selected from the group of protective clothing, artificial leather, footwear, bags, curtains, tents, sleeping bags, tarpaulins, and car seats is provided.

  According to the present invention, an infrared shielding fabric having not only excellent infrared shielding properties but also excellent breathability and wearing comfort and a fiber product using the infrared shielding fabric can be obtained.

It is an example (lattice pattern which has a resin adhesion part and a non-adhesion part, and an adhesion part continues) which can be employ | adopted by this invention. In addition, a black part is a resin adhesion part and a white part is a non-adhesion part. It is an example of a resin adhesion pattern that can be employed in the present invention (a flying island pattern having a resin adhesion part and a non-adhesion part, and the adhesion part is not continuous). In addition, a black part is a resin adhesion part and a white part is a non-adhesion part. It is a resin entire surface adhesion pattern.

  In the infrared shielding fabric of the present invention, the fibers constituting the base fabric are not particularly limited, and may be any of polyester fibers, acetate fibers, polyamide fibers, aramid fibers, carbon fibers, natural fibers such as cotton and wool. Of these, polyester fiber made of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, polyester copolymerized with the third component, or the like is preferable in terms of recyclability. The polyester may be material-recycled or chemical-recycled polyester or polyethylene terephthalate using a monomer component obtained from biomass, that is, a biological material. Furthermore, the polyester obtained using the catalyst containing the specific phosphorus compound and titanium compound which are described in Unexamined-Japanese-Patent No. 2004-270097 and 2004-21268 may be sufficient. In the polymer, a fine pore forming agent, a cationic dye dyeing agent, an anti-coloring agent, a heat stabilizer, a fluorescent whitening agent, a matting agent, a coloring agent may be added as necessary within the range not impairing the object of the present invention. 1 type (s) or 2 or more types of an agent, a hygroscopic agent, and inorganic fine particles may be contained.

  The fiber may be a short fiber or a long fiber (multifilament), but a long fiber (multifilament) is preferable for obtaining excellent infrared shielding properties. In particular, the fiber has a single yarn fiber fineness of 0.9 dtex or less (more preferably 0.0001 to 0.9 dtex), a filament count of 60 or more (more preferably 60 to 200), and a total fineness of 30. A multifilament of ˜200 dtex (more preferably 30 to 100 dtex) is preferable because excellent infrared shielding properties are obtained. Superfine fibers called nanofibers having a single yarn fiber diameter of 1 μm or less may be used.

  In addition, the fiber is a composite yarn obtained by subjecting a false twisted crimped yarn subjected to normal false twist crimping processing, an air processed yarn, or two or more kinds of constituent yarns to air mixing or composite false twisting. There may be. In particular, it is preferable that the fiber is a false twist crimped yarn because excellent infrared shielding properties can be obtained. The cross-sectional shape of the single fiber is not particularly limited, and may be a known cross-sectional shape such as a circle, a triangle, a flat shape, a constricted flat shape, or a hollow shape.

The fabric structure of the base fabric is not particularly limited, and may be any of woven fabric, knitted fabric, non-woven fabric and the like. In particular, in order to improve the infrared shielding property, the base fabric is a knitted fabric having a knitting density of 30 to 150 course / 2.54 cm and 20 to 130 wale / 2.54 cm, or a cover factor CF defined by the following formula: A woven fabric of 300 to 3500 (more preferably 300 to 1000) is preferable.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm). ]

  Here, the woven structure and the knitted structure are not particularly limited, but the weft knitted structure includes a flat knitted fabric, a rubber knitted fabric, a double-sided knitted fabric, a pearl knitted fabric, a tucked knitted fabric, a floating knitted fabric, a single knitted knitted fabric, a lace knitted fabric, a spliced knitted fabric, etc. Examples of the warp knitting structure include single denby knitting, single atlas knitting, double cord knitting, half knitting, half base knitting, satin knitting, half tricot knitting, fleece knitting, jacquard knitting, etc. Examples of the structure include, but are not limited to, a three-layer structure such as plain weave, twill weave, and satin weave, a change structure, a single double structure such as a vertical double weave and a horizontal double weave, and a vertical velvet. The number of layers may be a single layer or a multilayer of two or more layers. In addition, these woven fabrics and knitted fabrics can be manufactured by a conventional method.

  In addition, the base fabric may be appropriately subjected to post-processing such as normal dyeing processing, weight reduction processing, raising processing, water repellent processing, calendar processing, embossing processing, heat storage processing, and sweat absorption processing. Especially, it is preferable to perform water-repellent processing and / or calendar processing in order to obtain excellent infrared shielding properties.

The basis weight of the base fabric is preferably in the range of 30 to 900 gr / m ² (more preferably 30 to 90 gr / m ² ). If the basis weight is less than 30 gr / m ² , the infrared shielding property may be impaired. Conversely, if the basis weight is larger than 900 gr / m ² , wearing comfort may be impaired.

In the infrared shielding fabric of the present invention, a resin containing an infrared reflecting agent is partially adhered on at least one side (preferably only one side) of the base fabric.
Here, “partially adheres” means that “the resin is not attached to the entire surface of one side of the base fabric, but there are resin-attached portions and non-attached portions on the base fabric surface”. is there. Specifically, it is preferable that the resin adhesion portion is dispersed on the base fabric surface. For example, when the resin adheres to the base fabric surface in the lattice pattern shown in FIG. 1, the jumping island pattern, the polka dot pattern, the checkered lattice pattern, the stripe pattern shown in FIG. 2, not only has excellent infrared shielding properties. Excellent breathability and excellent wearing comfort are also obtained, which is preferable. As shown in FIG. 3, it is not preferable that the resin adheres to the entire surface of the base fabric because not only the air permeability of the fabric is impaired, but also the fabric easily sticks to the skin and wear comfort is impaired.

Moreover, in the base fabric piece surface to which the resin is adhered, excellent infrared shielding property, excellent when the ratio of the adhesion part area to the total area is in the range of 10 to 70% (more preferably 20 to 45%) It is preferable that air permeability and wearing comfort are easily obtained. When the proportion of the adhered part is larger than 70%, not only the air permeability may be impaired, but also the fabric may easily stick to the skin and the wearing comfort may be impaired. On the contrary, when the proportion of the adhered portion is smaller than 10%, there is a possibility that excellent infrared shielding properties cannot be obtained. In addition, the ratio of the adhesion part area with respect to the total area cuts out a square (length 30cm, width 30cm) sample from the cloth in the same direction as the cloth, and calculates by the following formula.
Adhesion area ratio (%) = A1 / A0 × 100
However, A0 is the total area (900 cm < ² >) of a sample surface, A1 is the resin adhesion part total area in the said sample surface. A1 may be obtained by calculation, or may be obtained from the weight of the paper pattern cut out in the same shape as the adhered portion.

In addition, the infrared reflecting agent in the present invention is not particularly limited as long as it has an average infrared reflecting characteristic with a wavelength of 700 to 1400 nm, but examples thereof include titanium oxide, aluminum oxide, zirconium oxide, barium sulfate, and the like. But titanium oxide is preferred.
The average primary particle diameter (sphere equivalent diameter measured by the BET method) of the infrared reflector is preferably in the range of 0.1 to 5 μm.

  Moreover, as content of the infrared reflective agent contained in the said resin, it is preferable that it is 0.5 weight% or more (more preferably 0.5-30 weight%) with respect to resin weight (solid content ratio). When the content of the infrared reflector is less than 0.5% by weight, sufficient infrared reflectivity may not be obtained.

  Here, silica particles may be included in the resin layer. In particular, silica particles having an average primary particle diameter (sphere equivalent diameter measured by the BET method) of 1 to 50 μm are 1.0% by weight or more (more preferably 1.% by weight) compared to the resin weight of the resin layer (solid content ratio). (0 to 10.0% by weight), the contact area between the human body (skin) and the fabric is reduced by the inorganic fine particles exposed (protrusions) on the resin layer, the friction coefficient is reduced, and further excellent wearing comfort is provided. Obtained and preferred.

As a kind of resin which forms the said resin layer, well-known binder resins, such as a urethane resin, an acrylic resin, a polyester resin, a silicone resin, a vinyl chloride resin, a nylon resin, may be sufficient. Further, the amount of adhesion to the base fabric of the resin is preferably 0.01~40g / ^{m 2} (more preferably 5 to 30 g / ^{m 2)} to the base fabric with a resin solids in the range of.

  The infrared shielding fabric of the present invention can be produced, for example, by the following production method. That is, a resin blend composition (resin layer) containing an infrared reflecting agent is applied to the base fabric in a pattern in which the resin partially adheres.

  Such a blended composition may be composed of either an aqueous system or a solvent system, but is preferably an aqueous system in the working environment of the processing step. Examples of the solvent include toluene, isopropyl alcohol, dimethylformamide, methyl ethyl ketone, ethyl acetate and the like. This blended composition may be used in combination with an epoxy-based crosslinking agent. Furthermore, you may further mix | blend a suitable additive for the objective of improving the adhesiveness with respect to a base fabric main body.

As means for applying the blended composition to the base fabric, known means such as gravure coating and screen printing can be used.
The infrared shielding fabric thus obtained has excellent infrared shielding properties since a resin containing an infrared reflecting agent is adhered. At that time, in the fabric, it is preferable that the average infrared reflectance at a wavelength of 700 to 1400 nm is 48% or more (more preferably 48 to 90%).

In addition, since the resin is partially attached (that is, having an attached portion and a non-attached portion) to at least one side of the base fabric, the air permeability is not impaired, Small stickiness and excellent wearing comfort. At that time, the air permeability is preferably 0.2 cc / cm ² · sec or more (more preferably 0.2 to 10.0 cc / cm ² · sec).

Next, the textile product of the present invention is a sportswear, outdoor wear, raincoat, men's clothing, women's clothing, work using the described infrared shielding fabric so that the surface to which the resin is attached is located on the human body side. Any textile product selected from the group of clothing, protective clothing, artificial leather, footwear, bags, curtains, tents, sleeping bags, tarpaulins, and car seats.
Since such a textile product uses the above-described infrared shielding fabric, it has not only excellent infrared shielding properties but also excellent breathability, and also has low wear on the skin and excellent wearing comfort. Have.

Examples of the present invention and comparative examples will be described in detail, but the present invention is not limited thereto.
<Unit weight>
It was measured according to JISL1096 6.4.
<Proportion of adherent area>
A square (30 cm long, 30 cm wide) sample was cut out from the fabric in the same direction as the fabric, and calculated according to the following formula.
Adhesion area ratio (%) = A1 / A0 × 100
However, A0 is the total area of the sample surface, and A1 is the total area of the resin adhesion portion on the sample surface.
<Average infrared reflectance>
The average infrared reflectance at a wavelength of 700 to 1400 nm was measured using a self-recording spectrophotometer UV-3100 manufactured by Shimadzu Corporation.
<Breathability>
The air permeability (cc / cm ² · sec) was measured by JIS L1096 6.27.1 A method (Fragile method).
<Fabric cover factor CF>
The cover factor CF of the woven fabric was calculated from the following formula.
CF = (DWp / 1.1) ^1/2 × MWp + (DWf / 1.1) ^1/2 × MWf
[DWp is the total warp fineness (dtex), MWp is the warp weave density (main / 2.54 cm), DWf is the total weft fineness (dtex), and MWf is the weft weave density (main / 2.54 cm). ]
<Wearing comfort>
Three testers performed sensory evaluation on the sticking property to the skin of the surface on which the resin layer of the fabric was formed, and evaluated it in the following three stages.
“Wearing comfort is excellent.”: It is difficult to stick to the skin, and the touch is excellent.
“Normal”: Normal.
“Wearing comfort is poor.”: It is easy to stick to the skin and feels bad.
<Heat insulation>
As a substitute characteristic of the infrared shielding property, a sample was held on 5 mm of black drawing paper, and a lamp light was irradiated from the sample side, and the temperature at the center of the drawing paper on the back side was measured with a thermocouple. When it is 53 ° C. or lower, it is considered good.
Use lamp: Iwasaki Electric Co., Ltd. eye lamp <spot> PRS100V500W
Irradiation distance: 50cm
Irradiation time: 15 minutes Test chamber temperature: 18-22 ° C

[Example 1]
Ordinary dyeing process including water-repellent finishing agent after weaving a known plain-texture machine using polyethylene terephthalate multifilament false twist crimped yarn 56dtex / 72fil (single yarn fiber fineness 0.8dtex) for warp and weft The base fabric (weight per unit area: 78 gr / m ² , cover factor CF1830) was obtained by carrying out calendering after dyeing in blue with a disperse dye.
Subsequently, the base fabric was calendered using a normal gravure print roll machine with a urethane resin containing titanium oxide (average primary particle size 1.0 μm) in a solid content ratio of 10% by weight. A resin layer was laminated on the entire surface by printing with the lattice pattern shown in FIG. 1 (the ratio of the adhesion area was 33%) to obtain an infrared shielding fabric.
The obtained fabric had a good average infrared reflectance of 55% and a heat shielding property of 49 ° C. The air permeability was 1.7 cc / cm ² · sec. Moreover, it was hard to stick to the skin and the touch was excellent, and it was excellent in wearing comfort.
Next, when the fabric was used with the resin layer positioned on the human body side to obtain a windbreaker (sportswear), it was excellent in infrared shielding properties and there was no stuffiness. Furthermore, the windbreaker is not easily stuck to the skin and has an excellent feel and wear comfort.

[Comparative Example 1]
In Example 1, it carried out similarly to Example 1 except not making a urethane type resin contain a titanium oxide.
The obtained fabric was unsatisfactory with an average infrared reflectance of 30% and a heat shielding property of 65 ° C. The air permeability was 1.7 cc / cm ² · sec.
Subsequently, when the fabric was used with the resin layer positioned on the human body side to obtain a windbreaker (sportswear), the infrared shielding property was unsatisfactory.

[Example 2]
In Example 1, it carried out similarly to Example 1 except changing the ratio of the adhesion part area of a lattice pattern into 80%.
The obtained fabric had an average infrared reflectance of 70% and a heat shielding property of 40 ° C. The air permeability was 0.2 cc / cm ² · sec.
Next, when the fabric was used with the resin layer positioned on the human body side to obtain a windbreaker (sportswear), it was excellent in infrared shielding properties, but had a slightly stuffy feeling.

[Comparative Example 2]
Example 1 was the same as Example 1 except that the resin was adhered to the entire surface of the base fabric as shown in FIG. The obtained fabric had inferior breathability of 0 cc / cm ² · sec.
Next, when the fabric was used with the resin layer positioned on the human body side to obtain a windbreaker (sportswear), there was a feeling of stuffiness.

  According to the present invention, there is provided an infrared shielding fabric having not only excellent infrared shielding properties but also excellent breathability and wearing comfort, and a textile product using the infrared shielding fabric, and its industrial use. The value is tremendous.

Claims (11)

  An infrared shielding cloth characterized in that a resin containing an infrared reflecting agent is partially attached on at least one surface of a base cloth.   2. The infrared shielding cloth according to claim 1, wherein a ratio of a resin adhesion area to a total area is within a range of 10 to 70% on one surface of the base fabric to which the resin is adhered.   The infrared shielding cloth according to claim 1 or 2, wherein the infrared reflecting agent is titanium oxide.   The infrared shielding cloth according to any one of claims 1 to 3, wherein a particle diameter of the infrared reflecting agent is within a range of 0.3 to 3.0 µm.   The infrared shielding fabric according to any one of claims 1 to 4, wherein the base fabric includes a polyester multifilament having a single yarn fineness of 0.9 dtex or less and a filament count of 60 or more.   The infrared shielding fabric according to claim 5, wherein the polyester multifilament is a false twist crimped yarn.   The infrared shielding fabric according to any one of claims 1 to 6, wherein the base fabric is subjected to water-repellent processing and / or calendar processing.   The infrared shielding fabric according to any one of claims 1 to 6, wherein the base fabric is subjected to sweat absorption.   The infrared shielding cloth according to any one of claims 1 to 8, wherein an average infrared reflectance at a wavelength of 700 to 1400 nm is 48% or more. The infrared shielding fabric according to claim 1, wherein the air permeability is 0.2 cc / cm ² · sec or more.   Sportswear, outdoor wear, raincoat, men's clothing, women's clothing, work clothes, wherein the infrared shielding cloth according to any one of claims 1 to 10 is used such that the surface to which the resin is attached is located on the human body side. , Any textile product selected from the group of protective clothing, artificial leather, footwear, heels, curtains, tents, sleeping bags, tarpaulins, and car seats.

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