JP2009262407A - Interior skin material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interior skin material having excellent design property and sufficient cushion property. <P>SOLUTION: The interior skin material 1 is composed of a three-dimensional knitted fabric having a knitted fabric front surface part 11, a knitted fabric back surface part 13 and a fabric joint 12 consisting of connecting strands 121 for connecting them, and is joined to a substrate 3 through an adhesive layer 2. Preferably, the fineness of fiber composing the knitted fabric front surface part, the yarn density of a well row, and the yarn density of a course row are 6-1,000 decitex, 15-40 threads/inch, and 10-100 threads/inch, respectively. The fineness of fiber composing the knitted fabric back surface part, the yarn density of the well row and the yarn density of the course row are 6-1,000 decitex, 15-40 threads/inch, and 10-100 threads/inch, respectively. The fineness of the connecting strand, the yarn density of the well row of the knitted fabric connecting part, and the yarn density of the course row are 6-1,000 decitex, 15-40 threads/inch, and 10-100 thread/inch, respectively. The interior skin material is useful as an interior material for a vehicle, particularly, a skin material for a ceiling material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an interior skin material. More specifically, the present invention is composed of a three-dimensional solid knitted fabric, and can be used by joining only this knitted fabric to a base material without the need for lamination bonding of other members. The present invention relates to an interior skin material having excellent design properties and sufficient cushioning properties. In particular, by using a three-dimensional solid knitted fabric with a specific configuration, when bonded to a substrate via an adhesive layer, there is no appearance defect due to the adhesive oozing out to the surface side, and after bonding Further, the present invention relates to an interior skin material having a more excellent design property and sufficient cushioning properties. This interior skin material is useful as a vehicle interior material, in particular, as a skin material such as a ceiling material having a large area and a curved surface.

  Conventionally, as a skin material for interior materials such as interior materials for vehicles, composite materials in which various knits are laminated and bonded to the surface of a resin foam sheet such as (1) non-woven fabric and (2) polyurethane foam sheet are used. Since the knitted skin material is a thin layer, it may be uneven as the surface after molding and may have a poor appearance. Therefore, it is used as the above composite material. Therefore, an interior skin material having a multilayer structure in which a back nonwoven fabric or the like is further laminated and bonded to the back surface of the foam sheet is used. Further, as an interior material such as an interior material for a vehicle, for a vehicle having a laminated structure in which a skin material provided with a web-like adhesive on the back surface and a base material provided with a film-like adhesive on the surface are adhered. Molding linings are known (for example, see Patent Document 1). Furthermore, a vehicle interior material in which a sound absorbing layer made of low air permeability urethane is formed between a base material and an outer skin is also known (see, for example, Patent Document 2).

  In addition, it is also suitably used as a cushion seat material for automobile seats, cushion seat materials for chairs, floor seats, bed sheets, etc., and a three-dimensional solid knitted fabric knitted into a mesh structure by a double raschel knitting machine It is known (see, for example, Patent Document 3).

JP 2000-334827 A JP 2002-200902 A JP 2002-138352 A

  The interior skin material made of a nonwoven fabric can be used by being joined to the base material alone without using any other member, and is low in cost from the viewpoint of material and process. On the other hand, the composite material has higher design properties, but it is expensive in terms of both material and process. Moreover, when discarding, it is difficult to select each member, and reuse is not easy. Further, although a three-dimensional solid knitted fabric is also known, in Patent Document 3, only various cushion materials and the like are exemplified as the use of the three-dimensional solid knitted fabric, and this three-dimensional solid knitted fabric is passed through an adhesive layer. There is no mention of bonding to a substrate.

  The present invention has been made in view of the above-described conventional situation, and is made of a three-dimensional solid knitted fabric, and only this knitted fabric is bonded to a base material without using lamination bonding of other members. It is an object to provide an interior skin material that has excellent design properties and sufficient cushioning properties despite being knitted. In particular, by using a three-dimensional solid knitted fabric with a specific configuration, when pressure-bonded to a substrate via an adhesive layer, there is no appearance defect due to the adhesive oozing to the surface, and bonding The purpose of the present invention is to provide an interior skin material that has a more excellent design property, has sufficient cushioning properties, and is useful as a vehicle interior material, particularly a skin material such as a ceiling material having a curved shape. To do.

The present invention is as follows.
1. It consists of a three-dimensional solid knitted fabric having a knitted fabric surface portion, a knitted fabric back surface portion, and a knitted fabric connecting portion made of a connecting yarn that connects the knitted fabric surface portion and the knitted fabric back surface portion, with the adhesive layer interposed therebetween. An interior skin material characterized by being bonded to a material.
2. The fineness of the yarn constituting the knitted fabric surface portion is 6 to 1000 dtex, the yarn density of the well row of the knitted fabric surface portion is 15 to 40 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch. Certain above 1. The interior skin material described in 1.
3. The fineness of the yarn constituting the back side of the knitted fabric is 6 to 1000 dtex, the yarn density of the well row of the back side of the knitted fabric is 15 to 40 / inch, and the yarn density of the course row is 10 to 100 / inch. Certain above 1. Or 2. The interior skin material described in 1.
4). 1. The fineness of the connecting yarn is 6 to 1000 dtex, the yarn density of the well row of the knitted fabric connecting portion is 15 to 40 / inch, and the yarn density of the course row is 10 to 100 / inch. To 3. The interior skin material of any one of these.
5. The connecting yarn is a crimped yarn, and the expansion / contraction restoration rate measured according to JIS L 1013 is 10 to 60%. To 4. The interior skin material of any one of these.
6). In the above 1., the intermediate load is 1 to 300 N / inch when the elongation at the time of measurement is 20% in the tensile strength test based on JIS L 1018. To 5. The interior skin material of any one of these.
7). The above-mentioned 1. used as a skin material for vehicle interior materials. To 6. The interior skin material of any one of these.
8). 6. The vehicle interior material is a ceiling material. The interior skin material described in 1.

The interior skin material of the present invention is composed of a three-dimensional solid knitted fabric, and can be used by being joined to a base material only with this knitted fabric without requiring lamination bonding of other members. As with the interior skin material made of a conventional composite material, it has excellent design properties and has sufficient cushioning properties. Moreover, since it consists only of a three-dimensional solid knitted fabric, it can be easily reused. Further, unlike a conventional composite material, a process of joining members by frame lamination or the like is not required. Therefore, resource saving and energy saving are possible, and the cost can be greatly reduced.
Further, the fineness of the yarn constituting the knitted fabric surface portion is 6 to 1000 dtex, the yarn density of the well row of the knitted fabric surface portion is 15 to 40 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch. In some cases, an interior skin material having particularly excellent design properties and sufficient cushioning properties can be obtained.
Further, the fineness of the yarn constituting the back side of the knitted fabric is 6 to 1000 dtex, the yarn density of the well row on the back side of the knitted fabric is 15 to 40 / inch, and the yarn density of the course row is 10 to 100 / inch. In some cases, when bonded to the base material via the adhesive layer, the adhesive can be sufficiently prevented from oozing onto the surface of the interior skin material, and the appearance of the adhesive oozing out to the surface side Defects can be suppressed, and an interior skin material having better design properties after bonding can be obtained.
Further, when the fineness of the connecting yarn is 6 to 1000 dtex, the yarn density of the well row of the knitted fabric connecting portion is 15 to 40 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch, The knitted fabric connecting part also suppresses the bleeding of the adhesive to the surface of the interior skin material, suppresses the appearance failure due to the surface of the adhesive oozing, and provides an interior skin material with particularly sufficient cushioning properties. be able to.
Further, when the connecting yarn is a crimped yarn and the expansion / contraction restoration rate measured based on JIS L 1013 is 10 to 60%, the degree of crimping is large, and the cushioning property of the knitted fabric connecting portion is more enhanced by the crimping. It can be used as an interior skin material having a particularly high cushioning property.
Moreover, even when the intermediate load is 1 to 300 N / inch when the elongation at the time of measurement is 20% in the tensile strength test based on JIS L 1018, even a base material having a curved surface is applied to the base material. It is easy to form, and can be brought into close contact with the base material, and can be used as an interior skin material having excellent design properties.
Furthermore, when used as a skin material for interior materials for vehicles, the base material often has a curved surface, and it is also an application that requires particularly excellent design properties, etc. An interior skin material having cushioning properties and the like can be obtained.
Furthermore, when the vehicle interior material is a ceiling material, it will be joined to a base material with many curved surfaces, and it is a large molded product. It can be set as the ceiling material which has a cushioning property.

Hereinafter, the present invention will be described in detail with reference to the drawings.
The interior skin material 1 of the present invention includes a knitted fabric surface portion 11, a knitted fabric back surface portion 13, and a tertiary fabric having a knitted fabric connecting portion 12 including a connecting yarn 121 that connects the knitted fabric surface portion 11 and the knitted fabric back surface portion 13. It consists of an original three-dimensional knitted fabric and is bonded to the base material 3 through the adhesive layer 2 (see FIG. 1).

[1] Knitted fabric surface portion and knitted fabric back surface portion The fiber constituting the yarn used for forming the above-mentioned "knitted fabric surface portion" and the above "knitted fabric back surface portion" is any of synthetic fiber, regenerated fiber, natural fiber, etc. But you can. The yarn may be a yarn composed of only one type of fiber, or may be a yarn formed by mixing a plurality of fibers. Further, it may be a thread that is not colored with the color tone of the fiber, or may be a thread colored with a predetermined color tone. In addition, the knitted fabric surface portion and the knitted fabric back surface portion may be formed of the same type of yarn or different types of yarn.

  More specifically, the above fibers include polyethylene terephthalate fibers, polybutylene terephthalate fibers, polytrimethylene terephthalate fibers, polyester fibers such as polylactic acid, nylon 6 fibers, polyamide fibers such as nylon 66 fibers, and polyacrylic. And synthetic fibers such as polyolefin fibers such as polypropylene fibers and polypropylene fibers, natural fibers such as cotton, hemp, silk, and wool, and regenerated fibers such as cupra rayon, viscose rayon, and lyocell. Of these, polyester fibers having high strength and excellent durability are preferred. Moreover, for the formation of the knitted fabric surface portion and the knitted fabric back surface portion, fibers having a fineness of 6 to 1000 dtex can be usually used. In particular, when the interior skin material is a vehicle skin material, it is preferable to use a multifilament having a fineness of 10 to 200 dtex.

  The form of the yarn may be any of filament yarn, spun yarn, twisted yarn, false twisted yarn, bulky processed yarn such as fluid jetting yarn, and the like. Furthermore, a multifilament or a monofilament may be used.

  Although the fineness of the yarn constituting the knitted fabric surface portion is not particularly limited, it is preferably 6 to 1000 dtex, particularly 10 to 200 dtex. If the fineness is 10 to 200 dtex, it is easy to produce a three-dimensional solid knitted fabric, and an interior skin material having excellent design properties can be obtained. Further, the yarn density on the surface of the knitted fabric is not particularly limited, but the yarn density of the well row is 15 to 40 yarns / inch, particularly 20 to 35 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch. In particular, it is preferably 25 to 85 lines / inch. If the yarn density of the well row is 20 to 35 yarns / inch and the yarn density of the course row is 25 to 85 yarns / inch, the interior having a sufficient cushioning property is provided by the knitted fabric surface portion and the knitted fabric connecting portion. It can be a skin material.

  The fineness of the yarn constituting the back side of the knitted fabric is not particularly limited, but is preferably 6 to 1000 dtex, particularly 10 to 200 dtex. If the fineness is 10 to 200 dtex, it is easy to produce a three-dimensional solid knitted fabric, and an interior skin material having excellent handling properties and concealing properties can be obtained. The yarn density on the back side of the knitted fabric is not particularly limited, but the yarn density of the well row is 15 to 40 yarns / inch, particularly 20 to 35 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch. In particular, it is preferably 25 to 85 lines / inch. If the yarn density of the well row is 20 to 35 yarns / inch and the yarn density of the course row is 25 to 85 yarns / inch, the inner skin of the adhesive when bonded to the substrate through the adhesive layer Exudation to the material surface can be sufficiently suppressed, and the back side of the knitted fabric is easily stretched, so that the adhesion and formability are not lowered when the material is brought into close contact with and bonded to the substrate.

[2] Connected yarn and knitted fabric connecting portion The "knitted fabric connecting portion" includes a connected yarn that connects the knitted fabric surface portion and the knitted fabric back surface portion. As the “connecting yarn”, a yarn made of long fibers is usually used. The kind of long fiber is not specifically limited, It is preferable to select and use suitably according to a use. Examples of the long fibers include polyethylene terephthalate fibers, polybutylene terephthalate fibers, polytrimethylene terephthalate fibers, polyester fibers such as polylactic acid, polyamide fibers such as nylon 6 fibers and nylon 66 fibers, polyacrylic fibers, and polypropylene fibers. Synthetic fibers such as polyolefin fibers, natural fibers such as cotton, hemp, silk, and wool, and regenerated fibers such as cupra rayon, viscose rayon, and lyocell. Of these, polyester fibers having high strength and excellent durability are preferred.

  The fineness of the connecting yarn is not particularly limited, but is preferably 6 to 1000 dtex, particularly 10 to 200 dtex. If the fineness is 10 to 200 dtex, it is easy to produce a three-dimensional solid knitted fabric, and it can be used as an interior material having sufficient cushioning properties, and the knitted fabric connecting portion is easily stretched to adhere to the base material. The adhesiveness and moldability are not deteriorated when bonded. Moreover, when the fineness of the connecting yarn is within a preferable range, it is possible to suppress the bleeding of the adhesive onto the surface of the interior skin material when bonded to the base material via the adhesive layer.

  The yarn density of the knitted fabric connecting portion is not particularly limited, and the well row has a yarn density of 15 to 40 yarns / inch, particularly 20 to 35 yarns / inch, and the course row has a yarn density of 10 to 100 yarns / inch, especially 25. It is preferable that it is -85 piece / inch. If the yarn density of the well row is 20 to 35 yarns / inch and the yarn density of the course row is 25 to 85 yarns / inch, the interior skin material having sufficient cushioning properties can be obtained, and the knitted fabric connecting portion It becomes easy to extend, and adhesion, moldability, etc. when it is made to adhere and join to a substrate do not fall. In addition, the oozing of the adhesive onto the surface of the interior skin material can be sufficiently suppressed.

  The connecting yarn is preferably a crimped yarn. If it is a crimped yarn, it can be set as an interior skin material which has more sufficient cushioning property more easily. When the connecting yarn is a crimped yarn, the degree of crimp is not particularly limited, but it is preferable that the expansion / contraction restoration rate measured based on JIS L 1013 is 10 to 60%. If the expansion / contraction restoration rate is 10 to 60%, the interior skin material having more sufficient cushioning properties can be obtained.

  The connecting yarn may be a monofilament or a multifilament. Further, all the connecting yarns can be monofilaments, and other fibers excluding the monofilaments can be knitted as needed during knitting. For example, a multifilament false twist yarn or the like can be knitted.

When the connecting yarn is composed of a monofilament, the fineness of the monofilament is not particularly limited, but it is preferable to use a monofilament having a fineness of 6 to 50 dtex, particularly 15 to 40 dtex. If the fineness is 15 to 40 dtex, it is possible to obtain an interior skin material having excellent cushioning properties with elasticity.
When the interior skin material is used as the skin material of a vehicle interior material by changing the diameter of the connecting thread and the number per unit area, the body of the interior material is applied when the body pressure of the occupant is applied to the interior material. The partial pressure can also be adjusted.

[3] Three-dimensional solid knitted fabric (interior skin material)
The above-mentioned “three-dimensional solid knitted fabric”, that is, the type of yarn used for forming each of the knitted fabric surface portion, the knitted fabric back surface portion, and the knitted fabric connecting portion constituting the interior skin material is as described above. All of the surface portion, the knitted fabric back surface portion, and the knitted fabric connecting portion can be formed of yarns made of polyester fibers. In this case, it can be depolymerized to a monomer at the time of disposal and recycled, and even if incinerated, generation of harmful gases can be suppressed. In particular, when the interior material is a vehicle ceiling material, the knitted fabric surface portion, the knitted fabric back surface portion, and the knitted fabric connecting portion are preferably formed of yarns made of polyester fibers. In this case, since the knitted fabric surface portion, the knitted fabric back surface portion and the knitted fabric connecting portion are all the same type of fibers, it is not necessary to sort and separate, and it can be recycled as it is, or is preferable because it can be incinerated. .

Although the thickness of a three-dimensional solid knitted fabric is not specifically limited, It can be 1-20 mm, It is preferable that it is 1-5 mm, especially 2.0-3.5 mm. If it is 1-5 mm in thickness, it can be set as the interior skin material which has sufficient tensile strength etc., is maintained in three-dimensionality at the time of use, and has the outstanding cushioning property. The weight of the three-dimensional solid knitted fabric is not particularly limited, and can be 10 to 1000 g / m ² , particularly 200 to 400 g / m ² . If the weight is 200 to 400, an interior skin material having sufficient tensile strength and the like and having excellent cushioning properties can be obtained.

  Furthermore, it is preferable that the intermediate load when the elongation at measurement is 20% in the tensile strength test based on JIS L 1018 is 1 to 300 N / inch, particularly 1 to 200 N / inch. If the load is 1 to 300 N / inch, the workability when joining to the base material is good, the followability to the base material is excellent, and even if the base material has a particularly large and curved surface, It can be sufficiently adhered to the material. Moreover, it is preferable that the tensile strength measured based on JISL1018 of a three-dimensional solid knitted fabric is 100-1000 N / inch, especially 100-500 N / inch. If the tensile strength is 100 to 500 N / inch, the interior skin is excellent in workability even if it is a large interior material such as a ceiling material of a vehicle, and is not easily damaged during joining. It can be a material.

In addition, the three-dimensional solid knitted fabric has a contact surface area of 2 cm ² , pressed at a speed of 0.02 mm / sec until the maximum load reaches 1.96 N (200 gf), and compressed per 1 cm ² . The work of compression (indicated as “WC” in Tables 1 to 3) is 4.9 × 10 ⁻⁵ J (0.5 gf · cm) to 9.8 × 10 ⁻⁴ J (10 gf · cm), particularly 9.8 × 10 ⁻⁵ J (1 gf · cm) to 4.9 × 10 ⁻⁴ J ( ⁵ gf · cm), and the thickness after compression (t ₁ ) is 5 of the initial thickness (t ₀ ). ˜55% [(t ₁ / t ₀ ) × 100], particularly preferably 10 to 40%. The compression work when evaluated by this specific method is 9.8 × 10 ^{−5 to} 4.9 × 10 ⁻⁴ J (1 to ⁵ gf · cm), and the thickness after compression (t ₁ ) is if 10 to 40% of the initial thickness (t _0), may be interior skin material having sufficient cushioning.

  Furthermore, the knitting structure of the knitted fabric surface portion and the knitted fabric back surface portion of the three-dimensional solid knitted fabric may be the same, or the knitting structure and the elongation characteristics may be different. In addition, at least one of the knitted fabric surface portion and the knitted fabric back surface portion may be a pattern texture, and the knitted fabric surface portion and the knitted fabric back surface portion may not be a patterned texture. Furthermore, when at least one of the knitted fabric surface portion and the knitted fabric back surface portion is a pattern structure, all of the respective plane directions may have a pattern structure, and some have a pattern structure. You may do it. In addition to the design properties of the surface of the knitted fabric, this knitted structure, as a whole knitted fabric of three-dimensional structure, has physical properties such as strength, elongation, bulkiness, concealment, compression hardness, compression modulus, appearance, handling properties, and heating. From the viewpoint of molding processability at the time of pressurization, it is preferable to comprehensively judge and set.

The use of the interior skin material of the present invention is not particularly limited, and the interior skin material can be used in many applications in which the interior skin material is bonded to a substrate via an adhesive layer. Such applications include vehicle interior materials, architectural interior materials, and the like. Examples of vehicles include passenger cars, buses, trucks, etc., railway vehicles such as trains and trains, construction vehicles, agricultural vehicles, and industrial vehicles. In addition, the interior skin material of the present invention can also be used as a skin material for interior materials such as aircraft and ships. In addition, examples of the use of the interior skin material include applications that are used by joining to a base material such as a ceiling of a passenger car, a bus, a truck, etc. (see FIG. 2), a pillar, a sun visor, a package tray, and the like.
When the interior skin material is used as a vehicle interior material, particularly as a skin material for a ceiling material, the fineness of the yarn constituting the surface of the knitted fabric, the yarn density of the surface of the knitted fabric, and the yarn constituting the back surface of the knitted fabric It is preferable that the fineness and the yarn density of the back side of the knitted fabric, and the fineness of the connecting yarn and the yarn density of the knitted fabric connecting portion are within the above numerical ranges, respectively. If it is an interior skin material provided with such a knitted fabric surface portion, a knitted fabric back surface portion, and a knitted fabric connecting portion, it is possible to form a ceiling having both excellent design properties and sufficient cushioning properties.

  The method for joining the interior skin material to the base material via the adhesive layer is not particularly limited. For example, an interior skin material and a base material having an adhesive disposed on one side face the interior skin material and a surface on which the adhesive of the base material is disposed between the molds of a hot press machine. It can be joined by interposing, heating and pressurizing. Further, at least one of the interior skin material and the base material on which the adhesive is disposed is heated, or the interior skin material and the base material on which the adhesive is disposed on one side are combined with the interior skin material and the base. It is also possible to laminate by facing the surface on which the adhesive of the material is disposed, and then heating the laminated body, then interposing between the molds of the cold press machine, and joining by pressurizing. it can. Adhesives can also be placed on the interior skin material side. Furthermore, adhesives are placed on one side of each of the base material and the interior skin material, and the respective adhesive layers are laminated facing each other and bonded together. You can also. Moreover, when using an adhesive resin film, it can laminate | stack by interposing a film between a base material and an interior skin material, and heating and pressurizing after that.

  The adhesive is not particularly limited, and various adhesives can be used. Examples of the adhesive include an emulsion containing an adhesive component, a slurry, a gel adhesive, a powder adhesive, an adhesive resin film, and an adhesive made of a foamed resin.

Hereinafter, the present invention will be specifically described by way of examples.
Example 1
An interior skin material made of a three-dimensional solid knitted fabric was produced using a double raschel knitting machine (model “RD6DPLM” manufactured by KARL MAYER).
As shown in Table 1, the surface of the knitted fabric is knitted using the L1 and L2 sheaths, the knitted fabric connecting portion using the L3 and L4 sheaths, and the knitted fabric back surface using the L5 and L6 sheaths. And the interior skin material used as a skin material of the ceiling material of the vehicle which consists of a three-dimensional solid knitted fabric was manufactured. The yarn type (denoted as SD in Table 1) is the same for the knitted fabric surface portion, the knitted fabric connecting portion, and the knitted fabric back surface portion, and is a yarn made of polyethylene terephthalate fiber. In addition, multifilaments are used as yarns for forming the knitted fabric surface portion and the knitted fabric back surface portion, and monofilaments are used as the yarns for forming the knitted fabric connecting portion at the length L3. At length L4, a multifilament and crimped yarn was used.

  Further, the fineness is 56 dtex for the yarns L1 and L2 used to form the knitted fabric surface portion, and 22 dtex for the yarn used for the yarn L3 used to form the knitted fabric connecting portion. The yarn used for L4 was 167 dtex, and the yarn used for the caps L5 and L6 for forming the back side of the knitted fabric was 84 dtex. Further, the yarn density is 27.0 / inch for the well row and 42.0 / inch for the course row at the surface of the knitted fabric, 27.0 / inch for the well row and 42 for the course row at the knitted fabric connecting portion. The number of wells was 27.0 lines / inch and the course line was 42.0 lines / inch on the back side of the knitted fabric.

  A specimen was cut out from an interior skin material made of a three-dimensional solid knitted fabric having a thickness of 2.4 mm manufactured as described above, and the specimen was the same size and the surface was coated with a thermosetting adhesive. Laminate on the surface of the base material made of rigid polyurethane foam laminated with glass mat, and then compression-molded using a hot press molding machine to produce a 5.0 mm thick interior skin material .

  Thereafter, the appearance of the interior skin material joined to the base material was visually observed. As a result, no wrinkles or surface irregularities (indicated as “abata” in Table 1) were observed on the interior skin material, and the interior skin material was not observed. No oozing adhesive was observed on the surface of the skin material. Moreover, according to the result of physical property evaluation of Table 1, the interior skin material of Example 1 has excellent strength, elongation (measured based on JIS L 1018), etc., and also has sufficient cushioning properties. I understand that

Example 2
Using the knitting machine used in Example 1, an interior skin material made of a three-dimensional solid knitted fabric was produced.
As shown in Table 2, the knitted fabric surface portion is knitted using L1 and L2 sheaths, the knitted fabric connecting portion is braided using L3 and L4 sheaths, and the knitted fabric back surface portion is knitted using L5 sheaths. An interior skin material used as a skin material for a vehicle ceiling made of a three-dimensional solid knitted fabric was manufactured. The yarn type is the same as in Example 1 for the knitted fabric front surface portion, the knitted fabric back surface portion, and the knitted fabric connecting portion length L4, and the knitted fabric connecting portion length L3 is a yarn composed of different types of polyethylene terephthalate fibers (Table 2 is referred to as a BR variant). Further, multifilaments were used in all of the knitted fabric surface portion, the knitted fabric connecting portion, and the knitted fabric back surface portion.

  The fineness is 56 dtex for the yarns L1 and L2 for forming the knitted fabric surface portion, and 56 dtex for the yarn L3 for forming the knitted fabric connecting portion. The yarn used for L4 was 84 dtex, and the yarn used for the sheath L5 for forming the back side of the knitted fabric was 84 dtex. Further, the yarn density is 25.0 / inch for the well row and 38.0 / inch for the course row at the surface of the knitted fabric, and 25.0 / inch for the well row and 38 for the course row at the knitted fabric connecting portion. The number of wells was 25.0 lines / inch and the course line was 38.0 lines / inch on the back side of the knitted fabric.

  The interior skin material made of a three-dimensional solid knitted fabric having a thickness of 2.3 mm manufactured as described above was joined to the base material in the same manner as in Example 1, and the interior skin material joined to the base material in the same manner. When the appearance was visually observed, no wrinkles or surface irregularities were observed on the interior skin material, and no oozing adhesive was observed on the surface of the interior skin material. Moreover, according to the result of physical property evaluation of Table 2, it can be seen that the interior skin material of Example 2 has excellent strength, elongation, and the like, and has sufficient cushioning properties.

Reference Example 1 and Reference Example 2
A skin material, a polyurethane foam sheet and a back base fabric are laminated and bonded, and a conventional type interior skin material having a thickness shown in Table 3 is joined to a base material in the same manner as in Example 1, and in the same manner. When the appearance of the interior skin material bonded to the base material is visually observed, no wrinkles or surface irregularities are observed on the interior skin material, and the adhesive that has exuded on the surface of the interior skin material is not observed at all. Not. Moreover, according to the physical property evaluation of Table 3, it can be seen that the interior skin materials of Reference Examples 1 and 2 have excellent strength, elongation, and the like, and have sufficient cushioning properties.
As described above, from Tables 1 to 3, the interior skin material of the present invention is an interior skin material made only of a three-dimensional solid knitted fabric, but has excellent performance as well as an interior skin material made of a conventional composite material.

It is a typical explanatory view of each section of an interior skin material joined to a substrate via a substrate, an adhesive layer, and an adhesive layer. It is typical explanatory drawing when the ceiling of the vehicle formed by laminating and bonding the interior skin material to the base material is viewed from the inside of the vehicle.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1; Interior skin material (three-dimensional solid knitted fabric), 11; Knitted fabric surface part, 12; Knitted fabric connection part, 121; Connecting thread, 13; Knitted fabric back surface part, 2; Adhesive layer, 3; Vehicle ceiling, 5; sun visor, 6; room lamp.

Claims (8)

  It consists of a three-dimensional solid knitted fabric having a knitted fabric surface portion, a knitted fabric back surface portion, and a knitted fabric connecting portion made of a connecting yarn that connects the knitted fabric surface portion and the knitted fabric back surface portion, with the adhesive layer interposed therebetween. An interior skin material characterized by being bonded to a material.   The fineness of the yarn constituting the knitted fabric surface portion is 6 to 1000 dtex, the yarn density of the well row of the knitted fabric surface portion is 15 to 40 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch. The interior skin material according to claim 1.   The fineness of the yarn constituting the back side of the knitted fabric is 6 to 1000 dtex, the yarn density of the well row of the back side of the knitted fabric is 15 to 40 / inch, and the yarn density of the course row is 10 to 100 / inch. The interior skin material according to claim 1 or 2.   The fineness of the connecting yarn is 6 to 1000 dtex, the yarn density of the well row of the knitted fabric connecting portion is 15 to 40 yarns / inch, and the yarn density of the course row is 10 to 100 yarns / inch. The interior skin material of any one of these.   The interior skin material according to any one of claims 1 to 4, wherein the connecting yarn is a crimped yarn, and an expansion / contraction recovery rate measured based on JIS L 1013 is 10 to 60%.   The interior skin material according to any one of claims 1 to 5, wherein an intermediate load is 1 to 300 N / inch when an elongation at measurement is 20% in a tensile strength test based on JIS L 1018.   The interior skin material according to any one of claims 1 to 6, wherein the interior skin material is used as a skin material of a vehicle interior material.   The interior skin material according to claim 7, wherein the vehicle interior material is a ceiling material.

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