JP2022073917A - Fabric and underwear made from regenerated collagen fiber - Google Patents

Abstract

To provide a fabric excellent in texture and touch.SOLUTION: A texture is made from regenerated collage fiber having a compression property RC of 40% or more. The regenerated collagen fiber has a fineness of preferably 1 to 10 dtex. The thread of the fabric has a thickness of preferably 5/1 Ne to 60/1 Ne, or 5/1 Ne to 60/1 Ne. The regenerated collagen fiber is suitably used particularly as winter underwear.SELECTED DRAWING: None

Description

The present invention relates to fabrics and underwear using regenerated collagen fibers.

Conventionally, knitted fabrics in which cotton, nylon and the like are appropriately combined have been widely used as underwear.
When used as underwear for summer, fibers having a particularly excellent cool contact feeling and textile products using the fibers have been studied. As a method for obtaining a fiber having an excellent cool contact feeling, for example, a method for improving the water absorption of the fiber or improving the thermal conductivity of the fiber has been performed (Patent Document 1).

Further, when used as underwear for winter, a knitted fabric having a heat-retaining property is preferred, and therefore a knitted fabric using a bag knitting structure is applied to the underwear. For example, Patent Document 2 discloses a three-layer structure knitted fabric in which a polyester woolly yarn is used as a front surface layer, a polyester hollow fiber is used as a knotting yarn, and a cotton yarn is used as a back surface layer.

Japanese Unexamined Patent Publication No. 2002-235278 Japanese Unexamined Patent Publication No. 2002-235264

The fabrics described in Patent Documents 1 and 2 are suitable for a specific purpose such as cool contact feeling and heat retention, and do not necessarily satisfy the comprehensive characteristics required for underwear such as texture and touch. I can't say.

An object of the present invention is to obtain a fabric that is preferably used for underwear and has an excellent texture and feel, and particularly an excellent moist feeling.

As a result of diligent studies by the present inventors, it was found that a fabric made of regenerated collagen fiber has a compression characteristic RC of 40% or more, and a fabric having excellent texture and texture (particularly moist feeling) can be obtained, and the present invention has been completed. ..

The first aspect of the present invention is a dough using regenerated collagen fiber, which is characterized by having a compression characteristic RC of 40% or more.

The second aspect of the present invention is the underwear made of the fabric according to the first aspect.

According to the present invention, it is possible to obtain a fabric having an excellent texture and texture. The fabric according to the present invention can be suitably used for underwear.

It is a figure which showed the result of the subjective evaluation of each fiber performed by the SD method. It is a figure which showed the measuring method of each physical characteristic by KES. It is a figure which shows the measurement result of the heat loss amount under the condition which simulated the amount of room at the time of wearing. It is a figure which shows the measurement result of the heat retention rate under the condition which simulated the amount of room at the time of wearing. It is a figure which shows the measurement result of the temperature and humidity assuming the climate in clothes.

The present invention will be described in detail below. The description of the constituent elements described below may be based on the representative embodiments of the present invention, but the present invention is not limited to such embodiments.

The regenerated collagen fiber used in the present invention is not particularly limited, but collagen that has been solubilized by an alkali solubilization method or an enzyme solubilization method using a floor skin of cows or the like as a raw material is lactic acid, hydrochloric acid, or acetic acid. Using an aqueous solution dissolved in an acid such as, the aqueous solution is spun from a spinning nozzle into an aqueous inorganic salt solution such as sodium sulfate, sodium chloride, ammonium sulfate to form fibers, and further, an organic cross-linking agent such as a monofunctional epoxy compound or the like. A typical example is a regenerated collagen fiber that has been made water resistant by reacting with a metal salt such as an aluminum salt, and can be suitably used. For example, the manufacturing method thereof is described in detail in JP-A-2007-177370, JP-A-2002-249982, JP-A-2017-524866 and the like.

The fabric using the regenerated collagen fiber is not particularly limited, and for example, cloth, woven fabric, knitted fabric, knitted fabric, non-woven fabric and the like can be used.

Items for subjective evaluation of the texture when the dough is touched include, for example, soft, plump, voluminous, smooth, warm, and moist. Of these, the moist feeling and the excellent touch feeling as winter underwear have a high degree of correlation. The fabric made of regenerated collagen fibers is excellent in texture and feel as winter underwear, and the compression characteristic RC as a physical characteristic is preferably 40% or more, and more preferably 45% or more.

The thickness of the yarn constituting the fabric is preferably 5/1 Ne to 60/1 Ne or 5/1 Ne to 60/1 Ne.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples, but the present invention is not limited to the following Examples.

The regenerated collagen fiber has a fineness of 2 dtex obtained by the same method as that described in the examples of Japanese Patent Application No. 2017-524866. The present inventors thought that it would be possible to easily obtain a fabric having excellent texture and feel by expressing the fabric having excellent texture and touch by physical characteristics, and regenerated collagen, cotton, and polyester. , Acrylic, rayon and other commonly used fibers were evaluated. In the evaluation, the counts of 5 types of regenerated collagen, cotton, polyester, acrylic, and rayon were 10/1 Ne (or 2/36 Nm), 20/1 Ne (or 2/72 Nm), and 30/1 Ne (or 1/52 Nm). Threads of three different thicknesses were prepared, rib-structured knitted fabrics made of each thread were prepared, and a total of 15 types of knitted fabrics were used as samples. The regenerated collagen was adjusted so that the count was almost the same as that of the other samples, and the yarn count represented by () was used.

In the evaluation, first, 22 subjects (11 males and 11 females) aged 21 to 24 years were used as subjects for subjective evaluation of the texture by touch. How to touch the sample in the evaluation
(1) Stroking the surface with your dominant hand while leaving the sample.
(2) Hold the sample with both hands and stroke the sample with your fingertips.
(3) The sample was placed, the sample was bent with the dominant hand, and the sample was patted. The touching method was explained to the subject before the evaluation.

In order to remove visual evaluation factors such as differences in color and structure, the evaluation was performed with an eye mask. The evaluation items are
(I) "Soft-hard",
(Ii) "Fluffy-stiff",
(Iii) "Volume-thin",
(Iv) "Smooth-Rough",
(V) "Warm-Cold",
(Vi) "Moist-dry",
(Vii) "It feels good as summer underwear-it feels bad as summer underwear",
(Viii) "It feels good as winter underwear-it feels bad as winter underwear"
Each evaluation was performed by a 7-step SD method from -3 to +3.
The results of the subjective evaluation are shown in FIG. 1, and the correlation coefficient between the subjective evaluation items is shown in Table 1.

Furthermore, using KES (Kato Tech Co., Ltd.) as physical characteristics, the characteristics shown in Tables 2 and 3 (tensile characteristics, bending characteristics, shear characteristics, surface characteristics, thickness, weight, heat / moisture / air) Maximum heat flux, heat conductance, heat loss amount, aeration resistance) were measured as the moving characteristics of. The outline of the measurement method is shown in FIG. 2, and the physical characteristic results are shown in Tables 4 and 5.

The correlation coefficient between subjective evaluation and physical characteristics is as follows (Table 6).

From the above subjective evaluation and the correlation coefficient of physical characteristics, paying attention to the moist feeling, the basic texture values KOSHI, NUMERI, FUKURAMI, SHARI were calculated from the objective evaluation formula KN403-KTU formula of the existing skin-wearing knitted fabric, and the KN304 formula. The total texture values THVs and THVw for summer and winter were calculated from the above. The results are shown below (Table 7).

From Table 7, it can be seen that the "moist feeling" can be captured by the existing KOSHI, SHARI, and NUMERI, which are objective evaluation formulas for skin-wearing angin.

Regenerated collagen and rayon are highly evaluated for "soft", "fluffy", "smooth", and "moist feeling", and are highly evaluated as underwear. In particular, it was found that among the regenerated collagens, those having a compression characteristic RC of 40% or more are highly evaluated as "moist feeling" and "winter underwear". On the other hand, it was confirmed that cotton and polyester have high evaluation values of "volume" and "roughness", and are not particularly preferable as "summer underwear". In addition, the acrylic sample had a high evaluation value of "rough" and "dry", and a low evaluation of "winter underwear", confirming that it is not very preferable as winter underwear.

Items that have a high correlation with the comprehensive evaluation items "feel good as summer underwear" and "feel good as winter underwear" are common to "soft", "fluffy", "smooth", and "moist feeling". It is clear that these items affect the evaluation of knitted fabrics worn on the skin, and that "winter underwear" is highly evaluated for samples with a strong "moist feeling", and "summer underwear" is highly evaluated for thin samples without "volume feeling". Became.

Regenerated collagen is characterized by having small tensile characteristics LT, WT, bending characteristics, shear characteristics, surface characteristics MMD and SMD, and large compression characteristics WC and RC. Rayon had low tensile, bending and shear properties, while cotton, polyester and acrylic showed high values. For samples with different counts, it was predicted that the characteristic values would change in the order of count, but only acrylic and rayon showed a tendency depending on the count. However, the characteristics of the properties of the fiber composition gave similar results in all counts.

As for the relationship between the subjective evaluation value and the physical characteristic value, the tension, bending, and shear characteristics have a strong correlation of 0.6 to 0.9 with "soft", "fluffy", "volume", "smooth", and "moist". It was clarified that these characteristics influence the evaluation of the touch. The correlation coefficient between the subjective evaluation item "moist feeling" and the physical characteristics showed 0.6 or more in the tensile characteristics LT, WT, bending characteristics, shear characteristics, compression characteristics RC, surface characteristics MMD, and qmax. Above all, it is considered that the surface characteristics can be regarded as an index of "moist feeling".

From the above evaluations, the inventors of the present application have found that the dough obtained from the regenerated collagen fiber has a compression characteristic RC of 40% or more and is excellent in texture and texture. It is more preferable to use a dough using regenerated collagen fibers having a fineness of 1 to 10 dtex.

<Measurement of heat loss and heat retention under conditions that simulate the amount of space when worn>
Assuming that there was a space between the human skin and the underwear when worn, the amount of heat loss and the heat retention rate were measured under conditions simulating it.
(Amount of heat loss and heat retention rate in dry state: Dry method)
In an environment where the outside temperature is 20 ° C., cover each of the above-mentioned samples on a hot plate (10 cm × 10 cm square) at 30 ° C. at intervals of 0 mm, 4.5 mm, and 9.5 mm from the hot plate (10 cm × 10 cm square). Contact sample area: 10 cm × 10 cm), and the amount of heat Wd (W) required to keep the hot plate at 30 ° C. was measured. In order to open the intervals of 4.5 mm and 9.5 mm, styrene plates having a thickness of 4.5 mm and 9.5 mm were placed on the four sides of the hot plate at 30 ° C., respectively. Further, the hot plate at 30 ° C. simulates the skin of a dry person.
Let A be the area of the hot plate ( ^{m 2} ), tbt (K) be the temperature of the hot plate, and ta (K) be the outside air temperature. K) was asked. The results are shown in FIG.
In addition, the amount of heat required to keep the hot plate at 30 ° C. is measured by the same method as above except that each sample described above is not used, and the amount of heat loss in the dry state is measured by the same method as above. I asked for _Q0 . Then, the heat retention rate in a dry state was obtained from the following formula (2). The results are shown in FIG.
Amount of heat loss in a dry state Qd = (Wd / A) · (tbt-ta) ... Equation (1)
Insulation rate in a dry state = [(Q ₀ -Qd) / Q ₀ ] ・ 100 ・ ・ ・ Equation (2)

(Amount of heat loss and heat retention rate in wet state: Wet method)
The hot plate is kept at 30 ° C by the same method as the Dry method except that a filter paper (10 cm × 10 cm square) having a water content of 200% is placed on the hot plate at 30 ° C and further covered with cellophane. The amount of heat Ww (W) required for this was measured. The filter paper having a water content of 200% imitates the skin of a person at the time of sweating.
Let A be the area of the hot plate ( ^{m 2} ), tbt (K) be the temperature of the hot plate, and ta (K) be the outside air temperature. K) was asked. The results are shown in FIG.
In addition, the amount of heat required to keep the hot plate at 30 ° C. is measured by the same method as above except that each sample described above is not used, and the amount of heat loss in a wet state is measured by the same method as above. I asked for _Q0 . Then, the heat retention rate in a wet state was obtained from the following formula (4). The results are shown in FIG.
Heat loss amount Qw in a wet state Qw = (Ww / A) · (tbt-ta) ... Equation (3)
Insulation rate in wet state = [(Q ₀ -Qw) / Q ₀ ] ・ 100 ・ ・ ・ Equation (4)

From FIG. 4, it can be seen that among the five types of samples, regenerated collagen has the highest heat retention rate in a dry state regardless of whether the distance between the hot plate and the sample is 4.5 mm or 9.5 mm.

<Measurement of temperature and humidity assuming the climate inside clothes>
The same method as the above Wet method is used except that the outside air conditions are hot conditions (28 ° C., 65% RH), standard conditions (20 ° C., 65% RH), and cold conditions (15 ° C., 65% RH). , Each of the above-mentioned samples is placed on the above-mentioned hot plate at a distance of 4.5 mm from the above-mentioned hot plate (contact sample area: 10 cm × 10 cm), and the temperature and humidity of the space between the above-mentioned hot plate and each sample. The change in was measured for 600 seconds. Moreover, after the measurement of temperature and humidity was completed (600 seconds after the start of the test), the amount of heat loss under the above three conditions was measured. The results of temperature and humidity are shown in FIG. 5, and the results of heat loss are shown in Table 8.

From FIG. 5, it can be seen that the humidity of regenerated collagen among the five types of samples is the lowest under standard conditions and hot conditions. It can also be seen that among the five types of samples, regenerated collagen has the highest heat retention under any of the conditions. Further, from Table 8, it can be seen that among the five types of samples, regenerated collagen has the lowest heat loss under standard conditions and cold conditions.

From these test results, it can be said that the regenerated collagen is more suitable than other fibers for winter underwear as a whole.

Claims (6)

A fabric using regenerated collagen fiber, which is characterized by having a compression characteristic RC of 40% or more. The dough according to claim 1, wherein a regenerated collagen fiber having a fineness of 1 to 10 dtex is used. The fabric according to claim 1 or 2, wherein the regenerated collagen fiber, which is a yarn having a thickness corresponding to 5/1 Ne to 60/1 Ne or 5/1 Ne to 60/1 Ne, is used as the yarn constituting the fabric. .. The fabric according to any one of claims 1 to 3, which is worn on the skin. The fabric according to any one of claims 1 to 4, which is worn for winter skin. Underwear made of the fabric according to any one of claims 1 to 5.

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