Adhesive interlining

Abstract

This adhesive interlining comprises a fiber base material including polylactic fibers, a first resin part provided in a dot pattern on at least one surface of the fiber base material, and a second resin part provided on the first resin part, wherein the first resin part contains a first biodegradable polyester having a melting point M1 of 100°C-180°C, the second resin part contains a second biodegradable polyester having a melting point M2 of 80°C-180°C, the melting point difference (M1-M2) between the melting point M1 and the melting point M2 is 0°C-70°C, and the melting point difference (M3-MA) between the melting point M3 of the polylactic fibers and the average value MA of the melting point M1 and the melting point M2 is 15°C or more.

Description

Fusible interlining

[0001] One aspect of the present invention relates to an adhesive interlining or the like.

[0002] When sewing clothes, adhesive interlinings are sometimes used to adhere to objects such as fabrics in order to prevent the garment from losing its shape and improve its shape retention. Known adhesive interlinings include a fiber base material and resin portions (resin portions for adhering to the objects) provided in a dot pattern on the surface of the fiber base material (see, for example, Patent Document 1 below).

[0003] Japanese Patent Application Laid-Open No. 2007-211365

[0004] In recent years, the industrial sector has been strongly demanding the reduction of environmental impact and the establishment of sustainable production and consumption patterns, and the use of biodegradable materials has been considered. Therefore, the use of biodegradable materials in adhesive interlinings is being considered. However, biodegradable adhesive interlinings may not achieve good tear strength and texture due to heat treatment, etc. during processing into adhesive interlinings, partly due to the low heat resistance of biodegradable synthetic fibers. Furthermore, laminates obtained by adhering adhesive interlinings to objects to be bonded may not achieve good texture and adhesion durability due to heat treatment, etc. during bonding.

[0005] One aspect of the present invention aims to provide a biodegradable adhesive interlining that has good tear strength and texture, and that can be used to obtain a laminate having good texture and adhesion durability by adhering the adhesive interlining to an object to be adhered.

[0006] In some aspects, the present invention relates to the following [1] to [4], etc.: [1] An adhesive interlining comprising a fiber substrate containing polylactic acid fibers, first resin portions provided in a dot pattern on at least one surface of the fiber substrate, and a second resin portion provided on the first resin portion, wherein the first resin portion contains a first biodegradable polyester having a melting point M1 of 100 to 180°C, and the second resin portion contains a second biodegradable polyester having a melting point M2 of 80 to 180°C, the melting point difference (M1-M2) of the melting point M1 from the melting point M2 is 0 to 70°C, and the melting point difference (M3-MA) ​​of the melting point M3 of the polylactic acid fibers from the average value MA of the melting points M1 and M2 is 15°C or more. [2] The adhesive interlining according to [1], wherein the melting point difference (M1-M2) is 10 to 45° C. and the melting point difference (M3-MA) ​​is 18 to 35° C. [3] The adhesive interlining according to [1] or [2], wherein the fiber base material consists solely of the polylactic acid fiber. [4] The adhesive interlining according to any one of [1] to [3], wherein the fiber base material contains a polylactic acid long fiber.

[0007] According to one aspect of the present invention, it is possible to provide a biodegradable adhesive interlining that has good tear strength and texture, and that, when adhered to an object to be adhered, can produce a laminate that has good texture and adhesion durability.

[0008] Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to these embodiments in any way.

[0009] In this specification, numerical ranges indicated using "to" indicate ranges that include the numerical values ​​before and after "to" as the minimum and maximum values, respectively. In the numerical ranges described in stages in this specification, the upper or lower limit of a certain numerical range can be arbitrarily combined with the upper or lower limit of a numerical range of another stage. In the numerical ranges described in this specification, the upper or lower limit of the numerical range may be replaced with a value shown in the examples. "A or B" may include either A or B, or may include both. Unless otherwise specified, the materials exemplified in this specification can be used alone or in combination of two or more. The "unit area" of the adhesive interlining refers to the unit area as viewed in the thickness direction of the fiber substrate of the adhesive interlining. "(Meth)acrylic" means at least one of acrylic and its corresponding methacrylic.

[0010] The adhesive interlining according to this embodiment comprises a fiber substrate (e.g., a base fabric) containing polylactic acid fiber, a first resin portion (lower layer resin portion) arranged in a dot pattern on at least one surface of the fiber substrate, and a second resin portion (adhesive resin portion, upper layer resin portion) arranged on the first resin portion. In this adhesive interlining according to this embodiment, the first resin portion contains a first biodegradable polyester having a melting point M1 of 100 to 180°C, and the second resin portion contains a second biodegradable polyester having a melting point M2 of 80 to 180°C. The melting point difference (M1-M2) between the melting point M1 and the melting point M2 is 0 to 70°C, and the melting point difference (M3-MA) ​​between the melting point M3 of the polylactic acid fiber and the average value MA of the melting points M1 and M2 is 15°C or more. A laminate can be obtained by adhering the adhesive interlining according to this embodiment to an object to be adhered. The object to be adhered is not particularly limited. Hereinafter, when referring to both the first resin portion and the second resin portion, they may be simply referred to as "resin portion." Hereinafter, the features related to the first resin portion refer to the first resin portion in a dot-shaped resin portion having a first resin portion and a second resin portion provided on the first resin portion.

[0011] The adhesive interlining according to the present embodiment is biodegradable because it uses a fiber substrate containing polylactic acid fiber and a resin part containing biodegradable polyester as biodegradable components. For example, the adhesive interlining according to the present embodiment can provide results showing biodegradability in the evaluations described in the examples below.

[0012] According to the inventor's findings, biodegradable materials have low heat resistance and tend to decompose easily, so when biodegradable materials are used in adhesive interlinings, which tend to be heated when adhering to an object to be adhered, problems may arise in the tear strength of the adhesive interlining, the texture of the adhesive interlining, the texture of the laminate, or the adhesive durability of the laminate. On the other hand, the adhesive interlining according to this embodiment is able to maintain these properties well while being biodegradable.

[0013] The adhesive interlining according to the present embodiment has good tear strength, and has good tear strength in the fiber direction containing the polylactic acid fiber. According to the adhesive interlining according to the present embodiment, a tear strength of, for example, 0.5 N / 25.4 mm or more (preferably 3.0 N / 25.4 mm or more, 6.0 N / 25.4 mm or more, 8.0 N / 25.4 mm or more) can be obtained in the evaluation described in the Examples below. When there are multiple fiber directions containing the polylactic acid fiber, the adhesive interlining according to the present embodiment may have good tear strength in the fiber direction with the lowest tear strength.

[0014] The adhesive interlining according to this embodiment has a good texture before it is adhered to an object to be adhered. The adhesive interlining according to this embodiment can obtain a result of "A" for the texture of the adhesive interlining in the evaluation described in the examples below.

[0015] The adhesive interlining according to this embodiment can provide a laminate having a good texture when bonded to an object to be bonded. The adhesive interlining according to this embodiment can provide a result of "A" for the texture of the laminate in the evaluation described in the examples below.

[0016] The adhesive interlining according to the present embodiment can provide a laminate having good adhesion durability by adhering the adhesive interlining to an object to be adhered, for example, a laminate having good adhesion durability even after being subjected to a washing treatment. The adhesive interlining according to the present embodiment can provide an adhesive strength of, for example, 80 cN / 25.4 mm or more (preferably, 100 cN / 25.4 mm or more, 200 cN / 25.4 mm or more, 250 cN / 25.4 mm or more, 300 cN / 25.4 mm or more, 400 cN / 25.4 mm or more) as evaluated in the examples described below.

[0017] According to one aspect of the adhesive interlining of this embodiment, a laminate can be obtained that has good adhesive strength of the adhesive interlining to the object to be adhered before washing treatment, obtained by adhering the adhesive interlining to the object to be adhered. According to one aspect of the adhesive interlining of this embodiment, an adhesive strength of, for example, 100 cN / 25.4 mm or more (preferably 200 cN / 25.4 mm or more, 300 cN / 25.4 mm or more, 400 cN / 25.4 mm or more, 500 cN / 25.4 mm or more) can be obtained in the evaluation (before washing treatment) described in the Examples below.

[0018] According to one aspect of the adhesive interlining of this embodiment, in a laminate obtained by adhering the adhesive interlining to an object to be adhered, it is possible to suppress resin bleed-through (a phenomenon in which the resin component of the resin portion on one side seeps out to the other side.) According to one aspect of the adhesive interlining of this embodiment, in the evaluation described in the examples below, it is possible to reduce the adhesive strength of the member arranged on the side opposite to the side on which the resin portion is arranged to, for example, 50 cN / 25.4 mm or less (preferably 30 cN / 25.4 mm or less, 20 cN / 25.4 mm or less, 15 cN / 25.4 mm or less, etc.).

[0019] The fiber substrate may be a fiber woven fabric, a fiber nonwoven fabric, an orthogonal fiber nonwoven fabric, a multiaxial fiber nonwoven fabric, or a fiber knitted fabric. The fiber substrate may be a fiber woven fabric from the viewpoint of easily obtaining excellent processability. The weave of the fiber woven fabric is not particularly limited. Examples of the weave of the fiber woven fabric include a plain weave, a twill weave, a satin weave, and a rib weave. The weave of the fiber woven fabric may be a plain weave or a twill weave from the viewpoint of easily performing processing to provide a resin portion. The weave of the fiber woven fabric may be a multiple weave such as a double weave (biaxial weave) or a triple weave. The weave of the fiber woven fabric may be a varied weave such as a basket weave or a rib weave. The weave of the fiber woven fabric may be a special weave such as a twill weave or a sand weave. The weave of the fiber woven fabric may be another weave.

[0020] The fiber substrate contains polylactic acid fiber (fiber containing polylactic acid). The fiber substrate may be composed solely of polylactic acid fiber, or may contain polylactic acid fiber and other fibers. When the fiber substrate is composed solely of polylactic acid fiber, it is likely to achieve good moisture absorption and quick-drying properties (for example, when water is brought into contact with an adhesive interlining, the residual moisture content in the adhesive interlining tends to decrease more quickly compared to an adhesive interlining of the same structure composed solely of cotton fiber, the most commonly used natural fiber; the same applies below). In a fiber woven fabric composed of warp and weft threads, the warp and weft threads may be composed of the same fiber yarn, or the warp and weft threads may be composed of different fiber yarns. In a fiber woven fabric composed of warp and weft threads, at least one of the warp and weft threads (or both) may contain polylactic acid fiber, at least a portion of the warp threads may contain polylactic acid fiber, and at least a portion of the weft threads may contain polylactic acid fiber. Examples of fibers other than polylactic acid fiber include natural fibers such as cotton fiber, rayon fiber, wool fiber, and hemp fiber.

[0021] From the viewpoint of easily achieving good water absorption and quick-drying properties, the content of polylactic acid fiber in the fiber substrate may be 30% by mass or more, 40% by mass or more, 50% by mass or more, more than 50% by mass, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or substantially 100% by mass (an embodiment in which the fiber substrate consists only of polylactic acid fiber), based on the total mass of the fiber substrate.

[0022] From the viewpoint of easily obtaining good moisture absorption and quick-drying properties, the proportion of polylactic acid fibers in the fiber substrate may be 10% or more, 20% or more, 30% or more, 40% or more, 50% or more, more than 50%, 60% or more, 70% or more, 80% or more, 90% or more, 95% or more, 98% or more, 99% or more, or substantially 100% (an embodiment in which the fiber substrate is composed only of polylactic acid fibers) based on the total number of fibers in the fiber substrate.

[0023] The melting point M3 of the polylactic acid fiber may be 140°C or higher, 145°C or higher, 150°C or higher, 155°C or higher, 160°C or higher, 165°C or higher, or 170°C or higher, from the viewpoint of easily suppressing deterioration of the physical properties of the fiber substrate due to heat treatment during processing into adhesive interlining or bonding to an object to be bonded. The melting point M3 may be 200°C or lower, 195°C or lower, 190°C or lower, 185°C or lower, 180°C or lower, 175°C or lower, or 170°C or lower, from the viewpoint of easily ensuring good biodegradability. From these viewpoints, the melting point M3 may be 140 to 200°C, 140 to 190°C, 140 to 180°C, 150 to 200°C, 150 to 190°C, 150 to 180°C, 160 to 200°C, 160 to 190°C, or 160 to 180°C. The melting point M3 can be measured using a differential scanning calorimeter (DSC) in accordance with JIS K 7123:2012.

[0024] The mass A1 per unit area of ​​the fiber base material is 10.0 g / m from the viewpoint of easily obtaining good tear strength. ２ Above, 15.0g / m ２ Above, 20.0g / m ２ Above, 25.0g / m ２ Above, 30.0g / m ２ Above, 40.0g / m ２ Above, 50.0g / m ２Above, 60.0g / m ２ Above, 70.0g / m ２ Above, 75.0g / m ２ or more, or 80.0 g / m ２ The mass A1 may be 400.0 g / m or more from the viewpoint of easily obtaining a good texture of the adhesive interlining. ２ Below, 350.0g / m ２ Below, 300.0g / m ２ Below, 250.0g / m ２ Below, 200.0g / m ２ Below, 190.0g / m ２ Below, 180.0g / m ２ Below, 170.0g / m ２ Below, 160.0g / m ２ Below, 150.0g / m ２ Below, 120.0g / m ２ Below, 100.0g / m ２ Below, 90.0g / m ２ Below, 85.0g / m ２ or less, or 80.0 g / m ２ From these viewpoints, the mass A1 is 10.0 to 500.0 g / m ２ , 15.0~400.0g / m ２ , 20.0~300.0g / m ２ , 25.0~200.0g / m ２ , 30.0~150.0g / m ２ , or 50.0 to 100.0 g / m ２ The unit area of ​​the fiber substrate in mass A1 includes the area occupied by the fibers as well as the area of ​​voids present between the fibers. Mass A1 tends to be the same before and after providing the resin portion on the fiber substrate.

[0025] As a method for measuring the mass A1 per unit area of ​​the fiber substrate, for example, when the fiber substrate is composed of natural fibers such as polylactic acid fibers, a method can be used in which the adhesive interlining is immersed in a solvent that does not dissolve the natural fibers but dissolves the resin portions, thereby removing the resin portions, and then the mass of the natural fibers is measured.

[0026] The fineness of the fibers (threads) constituting the fiber substrate (for example, average fineness: for example, when the fiber substrate is a fiber woven fabric composed of warp and weft threads, the average of the warp fineness and the weft fineness) may be 10.0 to 1000.0 dtex (dtex = g / 10000 m), 15.0 to 1000.0 dtex, 20.0 to 800.0 dtex, 25.0 to 500.0 dtex, 30.0 to 300 dtex, or 33.0 to 200.0 dtex.

[0027] The fiber substrate may contain polylactic acid long fibers (yarns) from the viewpoints of reducing the load in the scouring process for removing fiber impurities, facilitating obtaining good tear strength, facilitating obtaining good adhesive strength before washing treatment, and facilitating obtaining a good texture for the adhesive interlining. The polylactic acid long fibers (yarns) are fibers (yarns) having a length of 5.0 cm or more and composed of multiple polylactic acid filaments. The fiber substrate may contain polylactic acid short fibers (yarns). The polylactic acid short fibers (yarns) are fibers having a length of less than 5.0 cm and composed of multiple polylactic acid filaments.

[0028] When the fiber substrate is a fiber woven fabric composed of warp yarns and weft yarns, the warp weave density and the weft weave density may each independently be 25 to 200 yarns / 25.4 mm, 27 to 150 yarns / 25.4 mm, 30 to 120 yarns / 25.4 mm, or 35 to 110 yarns / 25.4 mm. The ratio of the weft weave density to the warp weave density (weft weave density / warp weave density) may be 0.50 to 2.00, 0.60 to 1.67, or 0.65 to 1.54.

[0029] The first resin portions may be provided in a dot pattern on at least one surface of the fiber substrate, or may be provided in a dot pattern on at least one surface of the fiber substrate. The first resin portions may be provided on only one surface of the fiber substrate, or may be provided on both surfaces of the fiber substrate. The adhesive interlining according to this embodiment may include first resin portions that are not connected to each other.

[0030] "Dot-shaped" usually means that a plurality of circular (approximately circular (including perfect circle) or approximately elliptical) dots are regularly arranged, but the shape or arrangement of each dot is not particularly limited. For example, the shape of each dot may be quadrangular (square, rectangular, diamond, etc.), hexagonal, star-shaped, irregular, etc. The dots may also be irregularly arranged. The dots may also be disconnected from each other. The dot-shaped first resin portions may be uniformly distributed. "Uniformly distributed first resin portions" may mean, for example, that when a fiber substrate is divided into 1-inch square regions (unit area: 1 inch x 1 inch: 1 inch = 25.4 mm: the same applies below) and the number of first resin portions per unit area in each region is determined, the coefficient of variation (standard deviation / average value) of the number of first resin portions per unit area may be 20% or less.

[0031] The second resin portion may be provided on the first resin portion and may be provided on the surface of the first resin portion. The second resin portion may be provided only on the first resin portion provided on one side of the fiber substrate, or may be provided on the first resin portion provided on both sides of the fiber substrate. The second resin portion can be formed by spraying particles containing the components of the second resin portion onto the first resin portion and then heating the particles to fix them to the first resin portion.

[0032] The number of dot-shaped resin portions (dot-shaped resin portions having a first resin portion and a second resin portion provided on the first resin portion; overlapping portions of the first resin portion and the second resin portion; for example, one dot-shaped constituent unit constituting a dot-shaped resin portion is composed of one first resin constituting a dot-shaped first resin portion and a plurality of second resin particles constituting a second resin portion fixed on the first resin) per square inch may be within the following ranges. The number of dot-shaped resin portions may be 9 / (25.4mm x 25.4mm) or more, 16 / (25.4mm x 25.4mm) or more, 49 / (25.4mm x 25.4mm) or more, 100 / (25.4mm x 25.4mm) or more, 400 / (25.4mm x 25.4mm) or more, or 900 / (25.4mm x 25.4mm) or more, from the viewpoint of easily obtaining good adhesive strength before washing treatment and easily obtaining a good texture of the adhesive interlining. The number of dot-shaped resin portions may be 6,400 / (25.4mm x 25.4mm) or less, 4,900 / (25.4mm x 25.4mm) or less, 3,600 / (25.4mm x 25.4mm) or less, 2,500 / (25.4mm x 25.4mm) or less, or 1,600 / (25.4mm x 25.4mm) or less, from the viewpoint of easily suppressing excessive hardening of the texture of the adhesive interlining. From these viewpoints, the number of dot-shaped resin portions may be 9 to 6,400 / (25.4 mm x 25.4 mm), 16 to 4,900 / (25.4 mm x 25.4 mm), 49 to 3,600 / (25.4 mm x 25.4 mm), 100 to 2,500 / (25.4 mm x 25.4 mm), or 900 to 1,600 / (25.4 mm x 25.4 mm).

[0033] The number of dot-shaped resin portions per square inch can be obtained by observing the dot-shaped resin portions in the adhesive interlining using a 1-inch stripe magnifying glass and counting the number of dot-shaped resin portions. The number of dot-shaped resin portions is measured at 10 1-inch square areas while changing the measurement locations so that the measurement locations are approximately evenly distributed throughout the adhesive interlining. The average of the measurements at 8 locations, excluding the maximum and minimum measurements, can be obtained as the number of dot-shaped resin portions per square inch. When dot-shaped resin portions are provided on both sides of the fiber substrate, the number of dot-shaped resin portions is the average value of the numbers on one side and the other side. If the number of dot-shaped resin portions is too large to count the entire number, the number can be obtained by measuring the number of dot-shaped resin portions in each vertical and horizontal row and multiplying the number of vertical and horizontal rows. Furthermore, if it is difficult to observe the dot-shaped resin portions using a 1-inch stripe magnifying glass, the number of dot-shaped resin portions per certain size can be measured using a microscope with a length measurement function and converted to inches.

[0034] The first resin portion contains a first biodegradable polyester having a melting point M1 of 100 to 180°C. The second resin portion contains a second biodegradable polyester having a melting point M2 of 80 to 180°C. The melting point M2 can be obtained by physically separating the second resin portion from the adhesive interlining and then measuring the melting point of the separated second resin portion using a differential scanning calorimeter (DSC) in accordance with JIS K 7123:2012. The melting point M1 can be obtained by the following procedure. First, a resin solution is obtained by dissolving the first and second resin portions of the adhesive interlining in a solvent capable of dissolving the first and second resin portions. Next, the solvent of this resin solution is volatilized to obtain a resin solid, and the melting point of this resin solid is measured using a differential scanning calorimeter (DSC) in accordance with JIS K 7123:2012. When there are two endothermic peaks in DSC, the melting point of the resin solid is compared with the melting point M2, and the melting point different from the melting point M2 can be calculated as the melting point M1. When there is one endothermic peak in DSC, the melting point M1 can be considered to be the same melting point as the melting point M2.

[0035] From the viewpoint of easily obtaining good adhesion durability, easily obtaining good adhesion strength before washing treatment, and easily suppressing resin bleed-through, the melting point M1 may be 100° C. or higher, 105° C. or higher, 110° C. or higher, 115° C. or higher, 120° C. or higher, 125° C. or higher, 130° C. or higher, 135° C. or higher, 140° C. or higher, 145° C. or higher, 150° C. or higher, 155° C. or higher, or 160° C. From the viewpoint of easily obtaining good resin fixation of the second resin portion, the melting point M1 may be 180° C. or lower, 175° C. or lower, 170° C. or lower, 165° C. or lower, 160° C. or lower, 155° C. or lower, 150° C. or lower, 145° C. or lower, 140° C. or lower, 135° C. or lower, or 130° C. or lower. From these viewpoints, the melting point M1 may be 100 to 160°C, 100 to 150°C, 100 to 140°C, 120 to 180°C, 120 to 160°C, 120 to 150°C, 120 to 140°C, 140 to 180°C, 140 to 160°C, 140 to 150°C, 150 to 180°C, 150 to 160°C, or 160 to 180°C.

[0036] From the viewpoint of easily obtaining good adhesive durability and easily obtaining good adhesive strength before washing treatment, the melting point M2 may be 80°C or higher, 84°C or higher, 85°C or higher, 90°C or higher, 95°C or higher, 100°C or higher, 105°C or higher, 110°C or higher, 115°C or higher, 120°C or higher, 125°C or higher, or 130°C or higher. From the viewpoint of easily obtaining a good texture for the adhesive interlining and easily obtaining good adhesive strength before washing treatment, the melting point M2 may be 180°C or less, 175°C or less, 170°C or less, 165°C or less, 160°C or less, 155°C or less, 150°C or less, 145°C or less, 140°C or less, 135°C or less, 130°C or less, 125°C or less, 120°C or less, 115°C or less, 110°C or less, 105°C or less, 100°C or less, 95°C or less, 90°C or less, 85°C or less, or 84°C or less. From these viewpoints, the melting point M2 may be 80 to 140°C, 80 to 130°C, 80 to 120°C, 80 to 100°C, 100 to 180°C, 100 to 140°C, 100 to 130°C, 120 to 180°C, 120 to 140°C, 120 to 130°C, 130 to 180°C, or 130 to 140°C.

[0037] The melting point M1 is the same as or greater than the melting point M2. The melting point difference (M1-M2) of the melting point M1 with respect to the melting point M2 is 0°C or more from the viewpoint of easily obtaining good adhesive strength before washing treatment and from the viewpoint of obtaining a laminate having a good texture. The melting point difference (M1-M2) may be 5°C or more, 10°C or more, 15°C or more, 20°C or more, 25°C or more, 30°C or more, 35°C or more, 40°C or more, 45°C or more, 50°C or more, 55°C or more, 60°C or more, 65°C or more, or 66°C or more from the viewpoint of easily obtaining good adhesive strength before washing treatment, easily obtaining good adhesive durability, and easily suppressing resin bleed-through. The melting point difference (M1-M2) is 70°C or less from the viewpoint of obtaining good adhesive durability. From the viewpoint of easily obtaining a laminate having a good texture and easily obtaining good adhesion durability, the melting point difference (M1-M2) may be 66°C or less, 65°C or less, 60°C or less, 55°C or less, 50°C or less, 45°C or less, 40°C or less, 35°C or less, 30°C or less, 25°C or less, 20°C or less, 15°C or less, 10°C or less, or 5°C or less. The melting point difference (M1-M2) may be 0 to 45°C, 0 to 30°C, 0 to 25°C, 0 to 20°C, 0 to 10°C, 10 to 70°C, 10 to 45°C, 10 to 30°C, 10 to 25°C, 10 to 20°C, 20 to 70°C, 20 to 45°C, 20 to 30°C, 20 to 25°C, 25 to 70°C, 25 to 45°C, 25 to 30°C, 30 to 70°C, 30 to 45°C, or 45 to 70°C.

[0038] The average value MA (MA = (M1 + M2) / 2) of the melting points M1 and M2 may be 90 ° C. or higher, 95 ° C. or higher, 100 ° C. or higher, 105 ° C. or higher, 110 ° C. or higher, 115 ° C. or higher, 117 ° C. or higher, 120 ° C. or higher, 125 ° C. or higher, 130 ° C. or higher, 135 ° C. or higher, 140 ° C. or higher, or 145 ° C. or higher, from the viewpoint of easily obtaining good adhesive strength before washing treatment and easily obtaining a laminate having good texture, the average value MA may be 180 ° C. or lower, 175 ° C. or lower, 170 ° C. or lower, 165 ° C. or lower, 160 ° C. or lower, 155 ° C. or lower, 150 ° C. or lower, 145 ° C. or lower, 140 ° C. or lower, 135 ° C. or lower, 130 ° C. or lower, 125 ° C. or lower, 120 ° C. or lower, or 117 ° C. or lower. From these viewpoints, the average value MA may be 90 to 180°C, 90 to 150°C, 90 to 145°C, 90 to 140°C, 90 to 130°C, 90 to 120°C, 120 to 180°C, 120 to 150°C, 120 to 145°C, 120 to 140°C, 120 to 130°C, 130 to 180°C, 130 to 150°C, 130 to 145°C, 130 to 140°C, 140 to 180°C, 140 to 150°C, 140 to 145°C, 145 to 180°C, or 145 to 150°C.

[0039] The melting point difference (M3-MA) ​​of the melting point M3 of the polylactic acid fiber relative to the average value MA is 15°C or more from the viewpoint of obtaining a good texture of the adhesive interlining. The melting point difference (M3-MA) ​​may be 20°C or more, 25°C or more, 30°C or more, 35°C or more, 40°C or more, 45°C or more, 50°C or more, or 53°C or more from the viewpoint of easily obtaining good adhesive strength before washing treatment and easily obtaining a laminate having a good texture. The melting point difference (M3-MA) ​​may be 70°C or less, 65°C or less, 60°C or less, 55°C or less, 53°C or less, 50°C or less, 45°C or less, 40°C or less, 35°C or less, 30°C or less, or 25°C or less from the viewpoint of easily obtaining good adhesive durability. From these viewpoints, the melting point difference (M3-MA) ​​may be 15 to 70°C, 15 to 55°C, 15 to 45°C, 15 to 35°C, 15 to 30°C, 15 to 25°C, 18 to 70°C, 18 to 55°C, 18 to 45°C, 18 to 35°C, 18 to 30°C, 30 to 70°C, 30 to 55°C, 30 to 45°C, 30 to 35°C, 35 to 70°C, 35 to 55°C, 35 to 45°C, 45 to 70°C, or 45 to 55°C.

[0040] From the viewpoint of easily obtaining good biodegradability, the glass transition temperature (Tg) of the first biodegradable polyester may be 90° C. or lower, 85° C. or lower, 80° C. or lower, 75° C. or lower, 70° C. or lower, 65° C. or lower, 60° C. or lower, 55° C. or lower, 50° C. or lower, or 49° C. or lower. From the viewpoint of preventing excessive biodegradability from being obtained, the glass transition temperature of the first biodegradable polyester may be 10° C. or higher, 15° C. or higher, 20° C. or higher, 25° C. or higher, 30° C. or higher, 35° C. or higher, 40° C. or higher, 45° C. or higher, 49° C. or higher, 50° C. or higher, 55° C. or higher, 60° C. or higher, or 65° C. or higher. From these viewpoints, the glass transition temperature of the first biodegradable polyester may be 10 to 90°C, 10 to 70°C, 10 to 65°C, 10 to 50°C, 40 to 90°C, 40 to 70°C, 40 to 65°C, 40 to 50°C, 60 to 90°C, 60 to 70°C, or 60 to 65°C.

[0041] The glass transition temperature (Tg) of the second biodegradable polyester may be, from the viewpoint of easily obtaining good biodegradability, 90° C. or lower, 85° C. or lower, 80° C. or lower, 75° C. or lower, 70° C. or lower, 65° C. or lower, 60° C. or lower, 55° C. or lower, 50° C. or lower, 45° C. or lower, or 40° C. or lower. From the viewpoint of preventing excessive biodegradability from being obtained, the glass transition temperature of the second biodegradable polyester may be 10° C. or higher, 15° C. or higher, 20° C. or higher, 25° C. or higher, 30° C. or higher, 35° C. or higher, 40° C. or higher, 45° C. or higher, 50° C. or higher, 55° C. or higher, 60° C. or higher, or 65° C. or higher. From these viewpoints, the glass transition temperature of the second biodegradable polyester may be 10 to 90°C, 10 to 70°C, 10 to 65°C, 10 to 45°C, 35 to 90°C, 35 to 70°C, 35 to 65°C, 35 to 45°C, 60 to 90°C, 60 to 70°C, or 60 to 65°C.

[0042] The glass transition temperatures of the first biodegradable polyester and the second biodegradable polyester can be measured using a differential scanning calorimeter (DSC) in the same manner as in the measurement of the melting point described above, except that JIS K 7121:2012 is used instead of JIS K 7123:2012.

[0043] The first resin portion may contain a biodegradable polyester that does not fall under the category of the first biodegradable polyester and has a melting point M1 of 100 to 180°C, and may contain a resin component (resin material) other than biodegradable polyester. The second resin portion may contain a biodegradable polyester that does not fall under the category of the second biodegradable polyester and has a melting point M2 of 80 to 180°C, and may contain a resin component (resin material) other than biodegradable polyester. Examples of resin components other than biodegradable polyester include (meth)acrylic resin, polyurethane, polyamide, polyolefin, vinyl acetate resin, epoxy resin, and polyvinyl alcohol.

[0044] From the viewpoint of easily obtaining good biodegradability, the content of the first biodegradable polyester may be 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or substantially 100% by mass (an embodiment in which the first resin part consists only of the first biodegradable polyester) based on the total mass of the first resin part.

[0045] From the viewpoint of easily obtaining good biodegradability, the content of the second biodegradable polyester may be 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or substantially 100% by mass (an embodiment in which the second resin part consists only of the second biodegradable polyester) based on the total mass of the second resin part.

[0046] The second resin portion may include particles containing a second biodegradable polyester. In the particle size distribution of the particles containing the second biodegradable polyester, the particle size range in which 95% of the particles are included based on the total particles may be 1 to 300 μm, 40 to 200 μm, or 80 to 120 μm, from the viewpoints of easily obtaining good adhesive strength before washing treatment, easily suppressing problems that occur when adhering the adhesive interlining (such as resin bleed-through and bleeding to various types of outer fabrics), and easily obtaining good adhesive durability.

[0047] The first resin part and the second resin part may contain components other than the resin component, such as inorganic particles, thickeners, surfactants, lubricants, pigments, etc.

[0048] Examples of inorganic particles include metal particles, metal oxide particles (excluding composite metal oxide particles), composite metal oxide particles, activated carbon particles, etc. Examples of metal particles include silver particles and copper particles, etc. Examples of metal oxide particles include titanium oxide particles, silicon oxide particles (e.g., silicon dioxide particles), zinc oxide particles, etc. Examples of composite metal oxide particles include SiO ２ -ZnO composite particles and the like.

[0049] Examples of thickeners include inorganic compounds such as water-soluble alkali silicate, montmorillonite, and colloidal alumina; cellulose derivative compounds such as methyl cellulose, hydroxyethyl cellulose, and carboxymethyl cellulose; polyether compounds such as pluronic polyether, polyether dialkyl ester, polyether dialkyl ether, modified polyether urethane, and modified polyether epoxy; polyacrylic acid compounds such as sodium polyacrylate and polyacrylic acid (meth)acrylic acid ester copolymer; polyvinyl compounds such as polyvinylpyrrolidone, polyvinyl alcohol, and polyvinylbenzyl alcohol copolymer; protein derivatives such as sodium caseinate and ammonium caseinate; and maleic anhydride copolymers such as partial esters of vinyl methyl ether-maleic anhydride copolymers and half esters of reaction products of drying oil fatty acid allyl alcohol esters and maleic anhydride.

[0050] Examples of surfactants include carboxylates, sulfonates, sulfates, quaternary ammonium salts, amine salts, betaine-type surfactants, polyhydric alcohol-type surfactants, polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene polyoxypropylene glycols, and polyethylene glycols.

[0051] Examples of lubricants include paraffin wax, synthetic polyethylene, liquid paraffin, stearic acid, behenic acid, hydroxystearic acid, stearyl alcohol, stearic acid amide, oleic acid amide, erucic acid amide, methylene bisstearic acid amide, ethylene bisstearic acid amide, glycerin monostearate, glycerin monooleate, butyl stearate, metal soap, and fumed silica.

[0052] Examples of pigments include alkali blue, lysol red, carmine 6B, disazo yellow, phthalocyanine blue, quinacridone red, isoindoline yellow, red earth, yellow ochre, green earth, malachite, chalk, graphite, iron blue, zinc white, cobalt blue, emerald green, viridian, titanium white, fluorescent pigments, metal powder pigments, pearl pigments, and thermochromic pigments.

[0053] The mass A2 per unit area of ​​the first resin portion is set to 0.1 g / m from the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability. ２ Above, 0.5g / m ２ Above, 1.0g / m ２ Above, 1.5g / m ２ Above, 2.0g / m ２ Above, 2.5g / m ２ or more, or 3.0 g / m ２ The mass A2 may be 30.0 g / m or more from the viewpoint of easily suppressing the strike-through of the resin. ２ Below, 25.0g / m ２ Below, 20.0g / m ２ Below, 15.0g / m ２ Below, 10.0g / m ２ Below, 9.0g / m ２ Below, 8.0g / m ２ Below, 7.0g / m ２ Below, 6.0g / m ２ Below, 5.5g / m ２ Below, 5.0g / m ２ Below, 4.5g / m ２ Below, 4.0g / m ２ Below, 3.5g / m ２ or less than 3.0 g / m ２From these viewpoints, the mass A2 may be 0.1 to 30.0 g / m ２ ,0.5~20.0g / m ２ , 1.0-15.0g / m ２ , 1.5-10.0g / m ２ , 2.0~8.0g / m ２ , or 2.5 to 5.0 g / m ２ When the first resin portion is provided on both sides of the fiber substrate, the mass A2 may be the total mass of the first resin portion on both sides. When the first resin portion is a resin composition containing components other than the resin component (inorganic particles, etc.), the mass A2 may be the mass per unit area of ​​the resin composition containing components other than the resin component.

[0054] The mass A3 per unit area of ​​the second resin portion is set to 1.0 g / m from the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability. ２ Above, 1.5g / m ２ Above, 2.0g / m ２ Above, 2.5g / m ２ Above, 3.0g / m ２ Above, 3.5g / m ２ Above, 4.0g / m ２ Above, 4.5g / m ２ Above, 5.0g / m ２ Above, 5.5g / m ２ Above, 6.0g / m ２ Above, 6.5g / m ２ Above, 7.0g / m ２ Above, 7.5g / m ２ Above, 8.0g / m ２ Above, 8.5g / m ２ Above, 9.0g / m ２ Above, 9.5g / m ２ or more, or 10.0 g / m ２ The mass A3 may be 50.0 g / m or more from the viewpoint of easily suppressing the strike-through of the resin. ２ Below, 45.0g / m ２ Below, 40.0g / m ２ Below, 35.0g / m ２ Below, 30.0g / m ２ Below, 25.0g / m ２ Below, 20.0g / m２ Below, 15.0g / m ２ Below, 12.0g / m ２ or less than 10.0 g / m ２ From these viewpoints, the mass A3 is 1.0 to 50.0 g / m ２ , 2.0~50.0g / m ２ , 3.0-30.0g / m ２ , 4.0-20.0g / m ２ , or 5.0 to 15.0 g / m ２ When the second resin portion is provided on both sides of the fiber substrate, the mass A3 may be the total mass of the second resin portion on both sides. When the second resin portion is a resin composition containing components other than the resin component (inorganic particles, etc.), the mass A3 may be the mass per unit area of ​​the resin composition containing components other than the resin component.

[0055] The mass A4 per unit area of ​​the dot-shaped resin portion (i.e., the sum of the mass A2 per unit area of ​​the first resin portion and the mass A3 per unit area of ​​the second resin portion) is set to 1.1 g / m from the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability. ２ Above, 3.0g / m ２ Above, 5.0g / m ２ Above, 6.0g / m ２ Above, 7.0g / m ２ Above, 8.0g / m ２ Above, 10.0g / m ２ or more, or 12.0 g / m ２ The mass A2 may be 80.0 g / m or more from the viewpoint of easily suppressing the strike-through of the resin. ２ Below, 50.0g / m ２ Below, 40.0g / m ２ Below, 30.0g / m ２ Below, 25.0g / m ２ Below, 20.0g / m ２ Below, 18.0g / m ２ or less, or 15.0 g / m ２ From these viewpoints, the mass A2 may be 1.1 to 80.0 g / m ２ , 3.0~50.0g / m ２ , 5.0-40.0g / m２ , 7.0-30.0g / m ２ , 8.0-25.0g / m ２ , or 10.0 to 20.0 g / m ２ When the dot-shaped resin portions are provided on both sides of the fiber substrate, mass A4 is the total mass of the dot-shaped resin portions on both sides. When the dot-shaped resin portions are a resin composition containing components other than the resin component (inorganic particles, etc.), mass A4 may be the mass per unit area of ​​the resin composition containing components other than the resin component.

[0056] The ratio R1 (=A3 / A2) of the mass A3 per unit area of ​​the second resin portion to the mass A2 per unit area of ​​the first resin portion may be in the following range. From the viewpoint of easily obtaining good adhesive strength before a washing treatment and good adhesive durability, the ratio R1 may be 0.1 or more, 0.5 or more, 1.0 or more, more than 1.0, 1.1 or more, 1.5 or more, 2.0 or more, 2.5 or more, 3.0 or more, or 3.3 or more. From the viewpoint of easily improving resin fixation of the second resin portion, the ratio R1 may be 10.0 or less, 8.0 or less, 7.0 or less, 6.0 or less, 5.5 or less, 5.0 or less, 4.5 or less, 4.0 or less, 3.5 or less, or 3.3 or less. From these viewpoints, the ratio R1 may be 0.1 to 10.0, 0.1 to 7.0, 0.1 to 4.0, 1.1 to 10.0, 1.1 to 7.0, 1.1 to 4.0, 3.0 to 10.0, 3.0 to 7.0, or 3.0 to 4.0.

[0057] The mass per unit area A2 of the first resin portion, the mass per unit area A3 of the second resin portion, and the mass per unit area A4 of the dot-shaped resin portion can be measured by the following procedure. First, 10 cm x 10 cm samples are cut out from five equally spaced locations in the adhesive interlining. Next, the mass a1 of each sample is measured. Next, each sample is immersed in a solvent that dissolves the first and second resin portions, and the mass a2 after dissolving the first and second resin portions is measured. The mass per unit area of ​​each sample is calculated from the difference between mass a1 and mass a2 and the area of ​​each sample. The average mass per unit area of ​​three samples, excluding the one sample with the largest value and the one sample with the smallest value, is taken as the mass per unit area A4 of the dot-shaped resin portion. Next, using a solution in which the first and second resin portions are dissolved, the respective resins are identified by 1H-NMR, 13C-NMR, etc. Next, a standard solution is prepared by appropriately mixing each resin, and the absorbance is measured to create a calibration curve. Based on this calibration curve, the mass ratio of the first resin to the second resin is determined from the absorbance of the above-mentioned solution. Mass A2 and mass A3 are calculated from mass A4 and this mass ratio. If the size of the adhesive interlining is too small to cut out five 10 cm x 10 cm samples, the size of the samples can be adjusted so that five samples can be cut out.

[0058] The ratio R2 (= [A2 / A1] × 100) of the mass A2 per unit area of ​​the first resin portion to the mass A1 per unit area of ​​the fiber base material may be in the following range: From the viewpoint of easily obtaining good adhesive strength before a washing treatment and good adhesive durability, the ratio R2 may be 0.30% or more, 0.50% or more, 0.80% or more, 1.00% or more, 1.30% or more, 1.50% or more, 1.60% or more, 1.70% or more, 1.80% or more, 2.00% or more, 3.00% or more, or 3.50% or more. From the viewpoint of easily maintaining a good texture of the adhesive interlining, the ratio R2 may be 30.00% or less, 25.00% or less, 20.00% or less, 18.00% or less, 15.00% or less, 12.00% or less, 10.00% or less, 9.00% or less, 8.00% or less, 6.00% or less, 5.00% or less, or 4.00% or less. From these viewpoints, the ratio R2 may be 0.30 to 30.00%, 0.50 to 20.00%, 1.00 to 15.00%, 2.00 to 10.00%, 3.00 to 9.00%, or 3.00 to 5.00%.

[0059] The ratio R3 (= [A3 / A1] × 100) of the mass A3 per unit area of ​​the second resin portion to the mass A1 per unit area of ​​the fiber base material may be in the following range. From the viewpoint of easily obtaining good adhesive strength before washing treatment and easily obtaining good adhesive durability, the ratio R3 may be 1.00% or more, 2.00% or more, 3.00% or more, 4.00% or more, 5.00% or more, 6.00% or more, 7.00% or more, or 7.50% or more. From the viewpoint of easily suppressing resin bleed-through, the ratio R3 may be 50.00% or less, 45.00% or less, 40.00% or less, 35.00% or less, 30.50% or less, 30.00% or less, or 27.50% or less. From these viewpoints, the ratio R3 may be 1.00 to 50.00%, 2.00 to 40.00%, 5.00 to 35.00%, 6.00 to 30.50%, or 7.50 to 27.50%.

[0060] The ratio R4 (= [A4 / A1] × 100) of the mass A4 per unit area of ​​the dot-shaped resin portion to the mass A1 per unit area of ​​the fiber base material may be in the following range: From the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability, the ratio R4 may be 1.30% or more, 3.00% or more, 5.00% or more, 7.00% or more, 8.00% or more, 9.00% or more, 10.00% or more, 11.00% or more, 12.00% or more, 14.00% or more, 15.00% or more, or 16.00% or more. From the viewpoint of easily maintaining a good texture of the adhesive interlining, the ratio R4 may be 55.00% or less, 50.00% or less, 45.00% or less, 40.00% or less, 35.00% or less, 33.00% or less, 30.00% or less, 25.00% or less, or 20.00% or less. From these viewpoints, the ratio R4 may be 1.30 to 55.00%, 5.00 to 45.00%, 8.00 to 40.00%, 10.00 to 35.00%, 11.00 to 33.00%, or 12.00 to 25.00%.

[0061] The total mass per unit area of ​​the fiber base material, the first resin part, and the second resin part (the total of mass A1, mass A2, and mass A3) may be in the following range. From the viewpoint of easily obtaining a suitable texture of the adhesive interlining and easily providing a lightweight garment, the total mass is set to 11.1 g / m ２ Above, 15.0g / m ２ Above, 20.0g / m ２ Above, 25.0g / m ２ Above, 30.0g / m ２ Above, 35.0g / m ２ Above, 40.0g / m ２ Above, 50.0g / m ２ Above, 60.0g / m ２ Above, 70.0g / m ２ Above, 80.0g / m ２ or more, or 90.0 g / m ２ The total mass may be 480.0 g / m or more from the viewpoint of easily obtaining a suitable texture of the adhesive interlining. ２ Below, 380.0g / m ２ Below, 280.0g / m ２ Below, 230.0g / m ２Below, 200.0g / m ２ Below, 180.0g / m ２ Below, 150.0g / m ２ Below, 120.0g / m ２ or less, or 100.0 g / m ２ From these viewpoints, the total mass may be 11.1 to 480.0 g / m ２ , 20.0~380.0g / m ２ , 30.0~280.0g / m ２ , 35.0~230.0g / m ２ , 40.0~180.0g / m ２ , or 50.0 to 150.0 g / m ２ It may be.

[0062] The average diameter D of the dot-shaped resin portions may be 50 μm or more, 80 μm or more, 100 μm or more, 120 μm or more, 150 μm or more, 180 μm or more, or 200 μm or more from the viewpoints of easily obtaining good adhesive strength before washing treatment and easily obtaining good adhesive durability. The average diameter D of the dot-shaped resin portions may be 1500 μm or less, 1250 μm or less, 1000 μm or less, 800 μm or less, 700 μm or less, or 500 μm or less from the viewpoint of making the dot-shaped resin portions less visible after adhesion to the adhesion object. From these viewpoints, the average diameter D of the dot-shaped resin portions may be 50 to 1500 μm, 80 to 1000 μm, 100 to 800 μm, 150 to 700 μm, or 200 to 500 μm.

[0063] The average diameter D of the dot-shaped resin portions can be obtained by observing the dot-shaped resin portions in the adhesive interlining using a microscope and measuring their diameters. The diameters of 20 dot-shaped resin portions are measured at different measurement locations so that the measurement locations are approximately evenly distributed throughout the adhesive interlining. The average of the 10 diameter measurements, excluding the five largest and five smallest measurements, can be obtained as the average diameter D of the dot-shaped resin portions. If the shape of the dot-shaped resin portions is not a perfect circle, the area of ​​the dot-shaped resin portions can be measured using area calculation software built into the microscope, and the diameter of a perfect circle having that area can be obtained as the diameter of the dot-shaped resin portions. When dot-shaped resin portions are provided on both sides of the fiber substrate, the average diameter D of the dot-shaped resin portions is the average of the average diameters on one side and the other side.

[0064] The average center-to-center distance d of the dot-shaped resin portions may be 0.1 mm or more, 0.15 mm or more, 0.2 mm or more, 0.25 mm or more, 0.3 mm or more, 0.35 mm or more, or 0.4 mm or more, from the viewpoint of easily maintaining a good texture of the adhesive interlining. The average center-to-center distance d may be 5.0 mm or less, 4.0 mm or less, 3.0 mm or less, 2.0 mm or less, 1.5 mm or less, or 1.0 mm or less, from the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability. From these viewpoints, the average center-to-center distance d may be 0.1 to 5.0 mm, 0.2 to 4.0 mm, 0.3 to 2.0 mm, 0.35 to 1.5 mm, or 0.4 to 1.0 mm.

[0065] The average center-to-center distance d of the dot-shaped resin portions can be obtained by observing the dot-shaped resin portions in the adhesive interlining using a microscope and measuring the distance between the centers of the dot-shaped resin portions. Specifically, an area (observation area 1) containing multiple (e.g., 10) dot-shaped resin portions is observed, and one dot-shaped resin portion is selected from that area. The distance between the center of this dot-shaped resin portion and the centers of multiple dot-shaped resin portions adjacent to it is measured. The average of the three shortest distances among the distance measurements is taken as the center-to-center distance. The center-to-center distances of all dot-shaped resin portions included in observation area 1 are calculated, and the top 10% of the largest center-to-center distances and the bottom 10% of the smallest center-to-center distances are excluded, and the average of the remaining center-to-center distances is taken as the average center-to-center distance d1. Next, two regions (observation region 2 and observation region 3; the dot-shaped resin portions contained therein do not overlap with observation region 1 and contain a plurality (e.g., 10) of dot-shaped resin portions. These regions are selected so that observation regions 1 to 3 are distributed approximately evenly throughout the adhesive interlining. As with observation region 1, the average center-to-center distances for observation region 2 and observation region 3 are calculated as average center-to-center distances d2 and d3. Next, the average center-to-center distance d is calculated as the average of the average center-to-center distances d1 to d3. Here, the center of the dot-shaped resin portions may be the geometric center (center of gravity) of the dot-shaped resin portions when viewed from the thickness direction of the fiber substrate of the adhesive interlining. When dot-shaped resin portions are provided on both sides of the fiber substrate, the average center-to-center distance d of the dot-shaped resin portions is the average of the average center-to-center distances on one side and the other side.

[0066] The ratio R (= d / D) of the average center-to-center distance d of the dot-shaped resin portions to the average diameter D of the dot-shaped resin portions may be in the following range. From the viewpoint of easily maintaining the texture of the adhesive interlining in a good condition, the ratio R may be 0.9 or more, 1.0 or more, 1.1 or more, 1.2 or more, 1.3 or more, 1.4 or more, or 1.5 or more. From the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability, the ratio R may be 8.0 or less, 7.0 or less, 6.0 or less, 5.0 or less, 4.0 or less, 3.5 or less, 3.0 or less, 2.5 or less, or 2.0 or less. From these viewpoints, the ratio R may be 0.9 to 8.0, 1.0 to 7.0, 1.0 to 6.0, 1.0 to 5.0, 1.1 to 5.0, 1.1 to 4.0, 1.2 to 3.5, 1.3 to 3.0, 1.4 to 2.5, or 1.5 to 2.0.

[0067] The average height of the dot-shaped resin portions may be 50 μm or more, 80 μm or more, 100 μm or more, 120 μm or more, 150 μm or more, 180 μm or more, or 200 μm or more, from the viewpoints of easily obtaining good adhesive strength before washing treatment and easily obtaining good adhesive durability. The average height of the dot-shaped resin portions may be 500 μm or less, 450 μm or less, 400 μm or less, 350 μm or less, 300 μm or less, 250 μm or less, or 200 μm or less, from the viewpoints of easily preventing bleed-through of the resin during adhesion and easily preventing the resin from bleeding through to the outer fabric side (the fiber substrate side of the adhesive interlining) during adhesion. From these viewpoints, the average height of the dot-shaped resin portions may be 50 to 500 μm, 50 to 300 μm, 50 to 250 μm, 100 to 500 μm, 100 to 300 μm, 100 to 250 μm, 150 to 500 μm, 150 to 300 μm, or 150 to 250 μm.

[0068] The average height of the dot-shaped resin portions can be calculated using the following method. First, the adhesive interlining is cut using scissors to obtain a measurement sample 20 mm wide and 50 mm long containing at least 20 dot-shaped resin portions. Next, the measurement sample is placed on a microscope stand, and the cut surface is observed using the microscope at 100x magnification. Next, the height of each of 10 approximately evenly distributed dot-shaped resin portions, with no apex defects due to cutting, is measured using the microscope's built-in calculation software. The average height of the six height measurements, excluding the two largest and two smallest measurements, is then calculated as the average height of the dot-shaped resin portions. When dot-shaped resin portions are provided on both sides of the fiber substrate, the average height of the dot-shaped resin portions is the average of the average heights of the one and the other sides. If the adhesive interlining is small and it is not possible to obtain a measurement sample 20 mm wide and 50 mm long, the size of the measurement sample can be adjusted to match the size of the adhesive interlining, and the number of dot-shaped resin portions whose heights are measured can also be adjusted to match the size of the measurement sample.

[0069] The coverage of the dot-shaped resin portions in the adhesive interlining is less than 100%, and from the viewpoint of easily obtaining a suitable texture of the adhesive interlining, may be 80.0% or less, 70.0% or less, 60.0% or less, 50.0% or less, 40.0% or less, 30.0% or less, 20.0% or less, less than 20.0%, 15.0% or less, 10.0% or less, 9.0% or less, 8.0% or less, 6.0% or less, 5.0% or less, or 4.0% or less. From the viewpoint of easily obtaining good adhesive strength before washing treatment and good adhesive durability, the coverage of the dot-shaped resin portions may be 1.0% or more, 1.5% or more, 2.0% or more, 2.5% or more, 2.8% or more, or 3.0% or more. From these viewpoints, the coverage of the dot-shaped resin portions may be 1.0 to 50.0%, 1.5 to 30.0%, 2.0 to 20.0%, 2.5 to 15.0%, 2.8 to 10.0%, or 3.0 to 9.0%.

[0070] The coverage of the dot-shaped resin portions is the proportion of the area of ​​the portion of the adhesive interlining where the dot-shaped resin portions are present (the portion of the adhesive interlining that is covered by the dot-shaped resin portions). The coverage of the dot-shaped resin portions can be determined by observing the surface of the adhesive interlining using a microscope, calculating the area S1 of the entire surface of the adhesive interlining (the area occupied by the fibers, excluding the area of ​​the voids between the fibers), and the area S2 of the portion of the adhesive interlining where the dot-shaped resin portions are present, and then using the formula "(S2 / S1) x 100." When dot-shaped resin portions are provided on both sides of the fiber base material, the coverage of the dot-shaped resin portions is the average of the coverage of one side and the other side.

[0071] The laminate according to the present embodiment includes the adhesive interlining according to the present embodiment and an object to be bonded, and the second resin portion of the adhesive interlining is bonded to the object to be bonded. The method for manufacturing the laminate according to the present embodiment includes a step of contacting the second resin portion of the adhesive interlining according to the present embodiment with the object to be bonded. In the laminate according to the present embodiment and the method for manufacturing the same, the second resin portion may include a molten portion.

[0072] EXAMPLES The present invention will be explained in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0073] <Preparation of adhesive interlining> An adhesive interlining having the characteristics shown in Table 1 was prepared according to the following procedure.

[0074] (Example 1) First, polylactic acid short fibers (fineness: 147 dtex (single fineness: 1.3 dtex), melting point: 170°C) were used as warp and weft yarns and woven at a weaving density of 60 warp yarns / 25.4 mm and 50 weft yarns / 25.4 mm to produce a fiber substrate (weave: plain weave, mass per unit area A1: 80 g / m ２ ) was obtained.

[0075] Next, a first biodegradable polyester (manufactured by GOO Chemical Industry Co., Ltd., trade name: GX-1473, melting point: 150°C, glass transition temperature Tg: 49°C) was attached to one surface of the above-mentioned fiber substrate to form dot-shaped first resin portions (circular, 784 pieces per square inch (784 pieces / (25.4 mm x 25.4 mm)), mass per unit area A2: 3.0 g / m ２Specifically, a screen having dot-shaped openings was used to uniformly provide dot-shaped first resin portions on one surface of the fiber base material.

[0076] Next, a particulate second biodegradable polyester (manufactured by Luminy PLA Neat Resin, trade name: Luminy PLA Neat Resin, melting point: 130°C, glass transition temperature Tg: 65°C, particle size range containing 95% of the particles: 80 to 120 μm) was attached to the surface of the first resin part to form a second resin part (mass per unit area A3: 10.0 g / m ２ ) was formed. Specifically, after the first biodegradable polyester adhered to the fiber substrate and before the first biodegradable polyester dried, particulate second biodegradable polyester was sprayed. Next, the second biodegradable polyester adhered to areas other than the dot-shaped first resin portions was removed, and the second biodegradable polyester was fixed by heating at 140°C for 30 seconds to form a second resin portion. Subsequently, by allowing it to cool to room temperature, an adhesive interlining was obtained with dot-shaped resin portions composed of a first resin portion and a second resin portion disposed on the first resin portion. The dot-shaped resin portions had an average diameter of 400 μm, an average height of 200 μm, an average center-to-center distance of 0.7 mm, and a coverage of 3.5%.

[0077] (Example 2) An adhesive interlining was obtained in the same manner as in Example 1, except that the first biodegradable polyester used was a product name "Luminy PLA Neat resin 2" (melting point: 160°C, glass transition temperature Tg: 65°C) manufactured by Bioworks Co., Ltd.

[0078] (Example 3) An adhesive interlining was obtained in the same manner as in Example 1, except that "Luminy PLA Neat Resin" (melting point: 130°C, glass transition temperature Tg: 65°C) manufactured by Luminy PLA Neat Resin Co., Ltd. was used as the first biodegradable polyester.

[0079] (Example 4) An adhesive interlining was obtained in the same manner as in Example 1, except that the second biodegradable polyester used was a product of Mitsubishi Chemical Corporation under the trade name "FD92" (melting point: 84°C, glass transition temperature Tg: 40°C).

[0080] (Example 5) Polylactic acid long fibers (fineness: 75 dtex, melting point: 170°C) were used as warp and weft yarns instead of polylactic acid short fibers, and the fabric was woven at a weave density of 60 warp yarns / 25.4 mm and 50 weft yarns / 25.4 mm to produce a fiber substrate (weave structure: plain weave, mass per unit area: 40 g / m ２ An adhesive interlining was obtained by the same procedure as in Example 1 except that a 100% polyester fiber sheet was obtained.

[0081] (Example 6) A fiber substrate (weave structure: plain weave, mass per unit area: 90 g / m) was produced by weaving cotton fibers (fineness: 147 dtex (cotton count: 40)) as warp yarns and the same polylactic acid staple fibers as in Example 1 as weft yarns at a weaving density of 90 warp yarns / 25.4 mm and 58 weft yarns / 25.4 mm. ２ An adhesive interlining was obtained by the same procedure as in Example 1 except that a 100% polyester fiber sheet was obtained.

[0082] Comparative Example 1 An adhesive interlining was obtained in the same manner as in Example 1, except that the first biodegradable polyester was a product manufactured by Bioworks Co., Ltd. under the trade name "PLAX160" (melting point: 160°C, glass transition temperature Tg: 65°C) and the second biodegradable polyester was a product manufactured by Mitsubishi Chemical Corporation under the trade name "FD92" (melting point: 84°C, glass transition temperature: 40°C).

[0083] Comparative Example 2 An adhesive interlining was obtained in the same manner as in Example 1, except that the second biodegradable polyester used was a product named "PLAX160" (melting point: 160°C, glass transition temperature Tg: 65°C) manufactured by Bioworks Co., Ltd.

[0084] (Comparative Example 3) An adhesive interlining was obtained in the same manner as in Example 1, except that the first biodegradable polyester was a product manufactured by Bioworks Co., Ltd. under the trade name "PLAX160" (melting point: 160°C, glass transition temperature Tg: 65°C), and the second biodegradable polyester was a product manufactured by Bioworks Co., Ltd. under the trade name "PLAX160" (melting point: 160°C, glass transition temperature: 65°C).

[0085] (Comparative Example 4) An adhesive interlining was obtained in the same manner as in Example 1, except that the first resin part was not formed and a second resin part similar to that in Example 1 was formed on one side of the fiber base material.

[0086] <Preparation of Laminate> The adhesive interlining and Kanakin were overlapped so that the dot-shaped resin portions of the adhesive interlining contacted the test attached white cotton cloth (Kanakin No. 3; hereinafter, Kanakin). Then, the adhesive interlining was pressed at 150°C and 0.3 kgf / cm using a press (manufactured by Kobe Electric Industrial Co., Ltd., product name: BP-V4812D). ２ The laminate was pressed for 10 seconds under the conditions of (a) to (c).

[0087] Cotton knit fabric (manufactured by Iida Senko Co., Ltd., product name: TX-10590) was laminated on both sides of the adhesive interlining, and then the fabric was pressed at 150°C and 0.3 kgf / cm using a press (manufactured by Kobe Electric Industrial Co., Ltd., product name: BP-V4812D). ２ The laminate was pressed for 30 seconds under the conditions of (a) to (c).

[0088] <Evaluation> (Biodegradability) The biodegradability of the above-mentioned adhesive interlining was measured according to the following procedure, with reference to JIS K 6953-1:2011. 10 g of the above-mentioned adhesive interlining was stored in soil in which microorganisms had been activated for 5 months, and then the mass was measured. All of the adhesive interlinings in the Examples and Comparative Examples were completely decomposed and were biodegradable.

[0089] (Tear Strength) The above-mentioned adhesive interlining was cut to obtain a test piece (warp direction: 63 mm, weft direction: 100 mm). The tear strength (unit: N / 25.4 mm) in the weft direction of this test piece was measured in accordance with Method D (pendulum method) of JIS L 1096:2020. The results are shown in Table 2.

[0090] (Texture) The texture of the above-mentioned adhesive interlinings (warp direction: 200 mm, weft direction: 200 mm, excluding Comparative Example 4) was evaluated by touch by five skilled experts. When five of the five experts judged that no significant hardening was observed in the adhesive interlining, based on the fiber base material before the dot-shaped resin portions were provided, the case was rated as "A", and when even one of the five experts judged that significant hardening was observed, the case was rated as "B".

[0091] The texture of the above-mentioned laminate A (excluding Comparative Examples 3 and 4) was evaluated by touch by five skilled experts. A comparative laminate was obtained using a general-purpose adhesive interlining comprising a fiber substrate (a fiber substrate made of polyester false twisted yarn) with the same warp and weft fineness and weave density as the fiber substrate used in the evaluation target, and a resin portion (a resin portion made of polyamide) with the same coverage as the dot-shaped resin portion used in the evaluation target. Next, if five of the five experts judged that no significant hardening was observed in laminate A compared to the comparative laminate, it was rated as "A," and if even one of the five experts judged that significant hardening was observed, it was rated as "B."

[0092] (Adhesion strength before and after washing treatment) The adhesive strength (unit: cN / 25.4 mm) of the adhesive interlining to the kanakin in the above-mentioned laminate A (excluding Comparative Examples 2 to 4) was measured in accordance with JIS L 1086:2020 (Testing methods for adhesive interlinings and adhesive fabrics). In addition, the above-mentioned laminate A (excluding Comparative Examples 2 to 4) was subjected to a washing treatment in accordance with JIS L 0217 103, and then the adhesive strength (unit: cN / 25.4 mm) of the adhesive interlining to the kanakin was measured in accordance with JIS L 1086 (Testing methods for adhesive interlinings and adhesive fabrics). The results are shown in Table 2.

[0093] (Resin Bleed-Through) Using a universal testing machine (manufactured by Shimadzu Corporation, product name: AG-I), the adhesive strength (peel speed: 100 mm / min, unit: cN / 25.4 mm) during T-peel between the laminate B and the cotton knit was measured on the side of the laminate B (excluding Comparative Examples 1 to 4) where the dot-shaped resin portions were not arranged. The results are shown in Table 2. If the adhesive strength on the side where the dot-shaped resin portions were not arranged is high, this suggests that the resin component of the adhesive interlining has seeped out to the side where the dot-shaped resin portions were not arranged.

[0094] (Water absorption and quick-drying property) After 0.3 mL of water was dropped onto the center of the surface of the above-mentioned adhesive interlining facing the dot-shaped resin portion, the adhesive interlining was left to stand at 25°C for 50 minutes. The mass of the adhesive interlining was then measured, and the residual moisture content was calculated as the increase in moisture content compared to before the water was dropped. Cases where the residual moisture content was lower than that of Example 6 were rated "A". The results are shown in Table 2.

[0095]

[0096]

Claims

1. An adhesive interlining comprising: a fiber substrate containing polylactic acid fibers; a first resin portion provided in the form of dots on at least one surface of the fiber substrate; and a second resin portion provided on the first resin portion, wherein the first resin portion contains a first biodegradable polyester having a melting point M1 of 100 to 180°C; the second resin portion contains a second biodegradable polyester having a melting point M2 of 80 to 180°C; the melting point difference (M1-M2) of the melting point M1 to the melting point M2 is 0 to 70°C; and the melting point difference (M3-MA) ​​of the melting point M3 of the polylactic acid fibers to the average value MA of the melting points M1 and M2 is 15°C or more.

2. The adhesive interlining according to claim 1, wherein the melting point difference (M1-M2) is 10 to 45°C, and the melting point difference (M3-MA) ​​is 18 to 35°C.

3. The adhesive interlining according to claim 1, wherein the fiber base material consists solely of the polylactic acid fiber.

4. The adhesive interlining according to any one of claims 1 to 3, wherein the fiber base material comprises polylactic acid long fibers.

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