Automobile interior fabric and method for manufacturing the same

Abstract

The present invention relates to a highly recyclable vehicle interior material that is rich in stretchability, excellent in cushioning properties, and can be used without laminating a urethane foam as a cushion layer on the back side. Weft-knitted fabric An object of the present invention is to provide such a material. 【Means for Solving the Problem】 The knitted fabric for vehicle interiors according to the present invention is a double jersey, is knitted including water-soluble fibers, and by dissolving and removing the water-soluble fibers, protrusions that extend in the thickness direction of the knitted fabric more than the thickness at the time of knitting are formed every 1 wale on the back side. It is characterized by this.

Description

Technical Field

[0001] The present invention relates to a knitted fabric for vehicle interiors.

Background Art

[0002] In recent years, in the automotive industry, improving the recyclability of parts has become an issue. For example, in the case of composite members, easy decomposability and the use of a single material for the members are required. As the surface material for vehicle interiors, a resin sheet material called synthetic leather, which is a fabric woven or knitted from synthetic fibers such as polyester fibers, or a synthetic leather obtained by laminating a polycarbonate-based urethane resin or a polyvinyl chloride resin on a synthetic fiber fabric, is used as the surface material. A three-layer composite member in which a cushioning material such as a soft urethane foam is laminated on the back side to absorb the cushioning property and wrinkles during construction and sewing, and a back cloth material such as a woven or knitted fabric or a non-woven fabric made of synthetic fibers is laminated to improve the workability of sheet covering is used.

[0003] However, a composite member in which a surface material, a soft urethane foam, and a back cloth material are laminated has a problem in that it is a composite of different materials, so it is difficult to decompose and has poor recyclability. In addition, in the case of a composite member, the combustion behavior is different for each material, and in order to meet the flame retardancy standards for interior materials used in automobiles, it is necessary to compound a flame retardant into each material, resulting in high material costs. Moreover, since it is laminated on the back side of the surface material, it requires time and effort, and there is a problem that the manufacturing cost becomes high.

[0004] It has been found that by raising the back side of a tricot knitted fabric to a specific thickness as the surface material, cushioning property can be imparted and a soft polyurethane foam can be omitted, and a surface material for vehicle interiors with high recyclability and design has been disclosed. However, by raising the back side, although the followability to the shape is improved when a part of the fibers constituting the knitted structure is cut, the stretchability is inferior, and it is insufficient as a surface material for vehicle interiors. (Patent Document 1).

[0005] In addition, a knitted fabric for building materials having porosity and cushioning properties, in which loop piles are formed on at least one of the reticulated substrates, and a method for manufacturing the same are disclosed. When forming the loops, water-soluble fibers are interwoven into a part of the knitting structure, and by removing the water-soluble fibers, loops of a size within the vertical distance of the double knitted fabric are formed. Such a knitted fabric is difficult to use in a state where the surface is exposed and cannot be used as a surface material for vehicle interiors that requires surface durability. (Patent Document 2).

[0006] A circular knitted fabric is disclosed, which forms piles by knitting soluble yarns using a circular knitting machine and then dissolving and removing them. The pile yarns are characterized in that a ground knitted fabric is formed by at least two consecutive loop knitting. In order to use the pile surface as the surface, the yarns forming the pile yarns also form the ground structure. Although it is strong against pile loss, it has the drawback that the fabric properties are limited. (Patent Document 3)

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0008] In view of such a technical background, the present invention has been made, and it is an object of the present invention to provide a vehicle interior surface material that satisfies the physical property requirements as a sheet surface material and cushioning properties without laminating a soft urethane foam as a cushion layer on the back side and has high recyclability.

Means for Solving the Problems

[0009] In order to achieve the above object, the present invention provides the following means.

[0010] [1] An upholstery fabric for a vehicle, wherein the upholstery fabric for a vehicle is a double jersey, The double jersey is knitted to include water-soluble fibers, and after dissolving the water-soluble fibers and projections extending in the thickness direction of the fabric rather than the thickness of the knitting are formed every one wale on the back side, after characterized in that it is an upholstery fabric for a vehicle. fabric .

[0011] [2] The fixed load elongation rate of the upholstery fabric for a vehicle is 8.0% or more, and the fixed load setting rate is 8.0% or less, which is the upholstery fabric for a vehicle according to item 1 above. fabric .

[0012] [3] The upholstery fabric for a vehicle has cushioning properties, the WC value in the KES compression characteristics is 4.0 gf*cm / cm2 or more, and the RC value in the KES compression characteristics is 35.0% or more, which is the upholstery fabric for a vehicle according to item 1 or item 2 above. fabric .

[0013] [4] A method for manufacturing a knitted fabric for vehicle interiors, wherein the knitted fabric for vehicle interiors is knitted containing water-soluble property fibers, and includes a knitting process by a double jersey circular knitting machine, a drawing and reversing process by center cutting, a process of dissolving the water-soluble fibers, and a heat setting process. By the heat setting process, projections extending in the thickness direction of the fabric rather than the thickness of the knitting are formed, which is a manufacturing method of an upholstery fabric for a vehicle. after fabric .

Advantages of the Invention

[0014] In the invention of [1], it is a double jersey in which projections extending in the thickness direction of the knitted fabric are formed every one wale on the back side, with a thickness greater than that during knitting. It is rich in stretchability and cushioning properties and has sufficient thickness, so it can be suitably used as an interior trim material for vehicles without laminating a soft urethane foam on the back side. Compared with the conventional soft urethane foam laminated structure, it can be manufactured from a single material and can be easily recycled. The flame retardant contained in the soft urethane foam is also unnecessary, and the flammability can be ensured only by the surface material, so an interior trim material for vehicles with less environmental impact can be provided.

[0015] In the invention of [2], since the elongation rate under a constant load is 8.0% or more and the set rate under a constant load is 8.0% or less, it has sufficient stretchability, cushioning properties and thickness, good shape followability, and can also be suitably used as a seat surface material for vehicle interiors. The elongation rate under a constant load refers to the elongation rate when a constant load is applied after a certain time has elapsed, and the set rate under a constant load refers to the recovery rate after a certain time has elapsed after measuring the elongation rate. It has the function of following the deflection of the seat pad with respect to the load applied during seating, i.e., the usage environment as a seat surface material, and recovering when getting up.

[0016] In the invention of [3], since the WC value in the KES compression characteristic is 4.0 gf*cm / cm 2 or more and the RC value in the KES compression characteristic is 35.0% or more, it has excellent cushioning properties and does not need to laminate a soft urethane foam on the back side. Even when molded into a relatively hard resin material such as a door or an instrument panel, it has a good touch and can create a luxurious feeling in the automobile interior. Similar to the invention of [1], it can provide an interior trim material for vehicles with high degradability and recyclability. For parts such as doors and instrument panels that are touched by hands during riding, a soft feeling is required, and a very thin soft urethane foam may be laminated on the back side.

[0017] In the invention of [4], since no protrusions are formed on the back side during the knitting process and the protrusions are formed after the calendering process, the handleability of the green fabric is good, and since no protrusions are formed during conveyance, there is no snagging on the protrusions and the calendering process can be carried out without problems. By dissolving and removing the water-soluble fibers after knitting and calendering, the knitted fabric shrinks appropriately, and protrusions that extend in the thickness direction of the knitted fabric more than the thickness at the time of knitting are formed on the back side, and stretchability can also be imparted.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0019] Next, an embodiment of the interior knitted fabric for vehicles according to the present invention will be described with reference to the drawings.

[0020] The knitted fabric for vehicle interiors according to the present invention is a skin material used for automobile seats, doors, instrument panels, etc., and the skin material is a knitted fabric knitted by a double jersey knitting machine, and on the back side thereof, protrusions that extend in the thickness direction of the knitted fabric more than the thickness at the time of knitting are formed every 1 wale. Refer to Fig. 1.

[0021] By adopting such a configuration, it is possible to provide a vehicle interior skin material 1 with increased thickness and cushioning properties and without the need to laminate a soft urethane foam on the back side.

[0022] Examples of the fibers constituting the knitted fabric for vehicle interiors of the present invention include synthetic fibers and water-soluble fibers. Examples of the synthetic fibers include polyester fibers, polyurethane fibers, polypropylene fibers, and the like. These may be appropriately combined. Among them, it is preferable that the knitted fabric contains polyester fibers from the viewpoint that excellent weather resistance can be maintained for automotive interior applications. Examples of the water-soluble fibers include water-soluble polyvinyl alcohol-based fibers, water-soluble ethylene-vinyl alcohol-based copolymer fibers, water-soluble polyamide fibers, etc. Among them, water-soluble vinylon, which is a widely used water-soluble polyvinyl alcohol fiber, is preferable.

[0023] In the knitted fabric for vehicle interiors of the present invention, as shown in FIG. 2, water-soluble fiber 5 is used for a part of the fibers constituting the knitted fabric during the live knitting process. After the live knitting process, through the stretching and reversing process by center cutting, the water-soluble fiber 5 is dissolved to form protrusion 2 on the back side, resulting in the product shown in FIG. 1.

[0024] Among the water-soluble fibers, water-soluble vinylon is characterized by shrinking before dissolution. Even when the water-soluble fiber is dissolved and removed, the density does not decrease, and the tissue strength can be ensured. In addition, protrusions that extend in the thickness direction of the knitted fabric rather than the thickness at the time of knitting are easily formed on the back side. Refer to FIG. 1.

[0025] Although it is conceivable that the tissue strength and thickness may decrease by dissolving and removing the water-soluble fiber, by further using a tack tissue, the tissue strength, stretchability, and thickness can also be ensured. In addition, since the back yarn that forms the protrusion on the back side is different from the surface yarn that organizes the surface side, the fabric properties can be easily changed. Also, by changing the surface side tissue, the degree of freedom in design is high and the designability is excellent. Since the protrusion surface is used as the back side, there is no concern about the protrusion coming off or fuzzing due to external force from the surface side. Refer to FIG. 3.

[0026] The gauge of the double jersey knitting machine is not particularly limited, but it is preferable to use a knitting machine with a gauge of 18 to 28 needles per inch. If it is less than 18 needles per inch, the fabric density will be coarse and the surface physical properties will be weak. On the contrary, if it exceeds 28 needles per inch, due to excessive density, the wear caused by the sewing needle during sewing will be severe and thread breakage at the seam is likely to occur, which is not preferable. The surface physical properties refer to fiber breakage and fuzzing due to surface wear. Since the protrusions are formed on the back side, the surface physical properties tend to be good.

[0027] Also, the number of courses on the knitting machine during double jersey knitting is preferably 30 to 50 courses per inch. If it is less than 30 courses per inch, the fabric density will be coarse, the cushioning property will be poor, and the surface physical properties will also deteriorate. On the contrary, if it exceeds 50 courses per inch, the elongation of the fabric will decrease, the fabric will become stiff, and wrinkles are likely to occur during sewing, and the sewability may also decrease, which is not preferable.

[0028] In the present invention, the thickness of the skin material is obtained by the protrusions formed on the back side, and the thickness is 2.0 mm or more. More specifically, by dissolving the water-soluble fibers knitted together during knitting, protrusions that extend in the thickness direction of the fabric more than the thickness during knitting can be formed on the back side, and the thickness can be imparted.

[0029] The protrusions need to be formed every 1 wale. If they are formed in all wales, the shrinkage of the fabric will be weakened in the process of dissolving the water-soluble fibers, and protrusions that extend in the thickness direction of the fabric more than during knitting cannot be formed, so the cushioning property will deteriorate, and at the same time, the fabric density will increase, resulting in higher rigidity and lower stretchability. It may be formed every 2 to 3 wales, but there is a possibility that the cushioning property will be relatively inferior.

[0030] As the material for forming the protrusions, generally, those obtained by applying a crimping process to the filament fibers constituting the yarn, which are commonly called polyester filament textured yarns, are good, regardless of the strength of the process. Due to the crimping process, the cushioning property is good, and thickness can be easily imparted. For water-soluble fibers and materials other than those for forming the protrusions, they can be appropriately selected according to the design to be expressed, but polyester fibers are preferred.

[0031] The yarn count of the material for forming the protrusions may be determined according to the gauge of the knitted fabric to be used. For example, in the case of a 20-gauge knitting machine, a range of 167 DTEX to 600 DTEX is good for forming the protrusions, and in the case of a 24-gauge knitting machine, a range of 110 DTEX to 450 DTEX is good. Regarding the single-filament fineness, although it is selected according to the yarn count, if it is in the range of 1.1 DTEX to 6.9 DTEX, a cushioned protrusion can be formed. When it is less than 1.1 DTEX, there is a risk that the volume feeling will decrease and a cushioned protrusion cannot be formed. Since the material for forming the protrusions does not appear on the surface side, white yarn without a dyeing process can also be used. Note that DTEX is used in the sense of decitex representing the thickness of the fiber.

[0032] On the other hand, for the yarn count of the water-soluble fiber, the finer the count is better so that it can be easily dissolved and removed. It is preferably 110 DTEX or less, and 56 DTEX or less is good.

[0033] Also, regarding the material used on the surface side, if it is a synthetic fiber such as polyester, the yarn count and fineness are not particularly limited. As a knitted fabric for vehicle interiors, it is only necessary to ensure the surface durability physical properties. The range of the yarn count is preferably 110 DTEX to 500 DTEX, and the single-filament fineness can be appropriately selected within the range of 0.5 DTEX to 4.0 DTEX. From the perspective of reducing the dyeing process and dyes, stock-dyed yarns can also be used. Since the yarn used on the surface side does not form protrusions on the back side, original-colored mixed yarns, shiny yarns, etc., which are rich in design, can also be used.

[0034] The knitted fabric for vehicle interiors of the present invention has protrusions formed at each wale on the back side. The elongation at a specified load is preferably 8.0% or more, and the setting rate at a specified load is preferably 8.0% or less. It can also be used in parts that require elasticity. For example, it can be suitably used as a seat skin material that requires followability to the seat pad, or as a skin material for doors and instrument panels with complex shapes. When the elongation at a specified load is 8.0% or less, the followability to the shape decreases and it is likely to wrinkle. When the setting rate at a specified load is 8.0% or more, doubling of the fabric on the seat occurs after removal of the load.

[0035] Regarding the compression characteristics of the knitted fabric for vehicle interiors of the present invention, the WC value in the KES compression characteristics is preferably 4.0 gf*cm / cm 2 or more, and the RC value in the KES compression characteristics is preferably 35.0% or more. Since it has a cushioning property similar to that of a soft urethane foam laminated as a cushion layer on the back side, it can be suitably used as a knitted fabric for vehicle interiors without laminating a soft urethane foam.

[0036] The manufacturing process of the knitted fabric for vehicle interiors of the present invention includes a knitting process using a double jersey circular knitting machine, a drawing process of cutting a part of the tubular knitted fabric for vehicles called center cut, a washing process of dissolving and removing the water-soluble fiber, and a heat setting process using a tenter dryer. By removing the water-soluble fiber after the drawing process, the handleability of the green fabric is good and the process passing property is good.

[0037] Regarding the knitting machine, a double jersey circular knitting machine is used.

[0038] The process of dissolving and removing the water-soluble fiber can simultaneously contract the density of the green fabric, so a tube-type liquid flow dyeing machine is good. If a continuous dyeing machine or a relaxation machine equipped with a bath can perform a hot water passing process at 60°C or higher and 90°C or lower, it is also acceptable. Then, the final density is adjusted by a heat setting process using a tenter dryer to obtain a product.

Example

[0039] Next, specific embodiments of the present invention will be described, but the present invention is not limited to these embodiments. In the examples and comparative examples, polyester fibers were used for the knitting yarns. Table 1 shows the yarn counts of the materials used and the like, and Figure 3 shows the used parts of the knitting structure. DTEX described in the material composition column means decitex. Also, the evaluation results are shown in Table 2. As for the comprehensive evaluation, those with all good evaluation items were marked as "〇", and those with even one bad item were marked as "×".

[0040] <Example 1> Using a double jersey knitting machine consisting of 22 gauge and 33 inches, knitting was performed with the material composition described in Table 1 and the knitting structure shown in Figure 3. The thickness immediately after knitting was 1.2 mm. After knitting, through the process of center cut and stretching and shrinking, it was processed in a tube-type liquid flow dyeing machine at 130 °C for 30 minutes to dissolve and remove the water-soluble fibers, and at the same time, shrinkage was applied to the raw fabric. Then, it was dried in a tenter dryer at 160 °C for 5 minutes and heat set to obtain a knitted fabric for vehicle interior. The density of the obtained knitted fabric was 37 wales / inch and 33 courses / inch, and the weight was 445 g / m 2 , and the thickness was 2.4 mm. The elongation rate at a constant load was 18.3% in the warp direction and 22.7% in the weft direction, and the setting rate at a constant load was 3.2% in the warp direction and 4.6% in the weft direction. The Taber abrasion was grade 3, and the KESWC value was 4.5 gf*cm / cm 2 , and the KESRC value was 40.8%. Both the thickness, surface physical properties, stretchability, and cushioning properties were good, and the comprehensive evaluation was "〇".

[0041] <Example 2> In Example 1, the yarn count of the yarn forming the protrusions on the back side and the surface yarn 2 were changed. The thickness immediately after knitting was 1.3 mm. The same processing as in Example 1 was performed to obtain a knitted fabric for vehicle interior. The density of the obtained knitted fabric was 37 wales / inch and 34 courses / inch, and the weight was 476 g / m 2 , and the thickness was 2.8 mm. The elongation rate at a constant load was 14.5% in the warp direction and 16.2% in the weft direction, and the setting rate at a constant load was 2.6% in the warp direction and 3.6% in the weft direction. The Taber abrasion was grade 3, and the KESWC value was 4.7 gf*cm / cm 2, the KESRC value was 43.6%. Both the thickness, surface physical properties, stretchability, and cushioning properties were good, and the overall evaluation was "〇".

[0042] <Example 3> In Example 2, the structure was changed, and the formation of the protrusions on the back side was changed every 2 wales. The thickness immediately after knitting was 1.3 mm. The same processing as in Example 1 was performed to obtain a knitted fabric for vehicle interior. The density of the obtained knitted fabric was 38 wales / inch and 35 courses / inch, and the weight was 465 g / m 2 , the thickness was 2.7 mm. The elongation rate under a constant load was 16.5% in the warp direction and 18.7% in the weft direction, and the setting rate under a constant load was 2.8% in the warp direction and 3.7% in the weft direction. The Taber abrasion was grade 3, and the KESWC value was 4.6 gf*cm / cm 2 , the KESRC value was 42.6%. Both the thickness, surface physical properties, stretchability, and cushioning properties were good, and the overall evaluation was "〇".

[0043] <Comparative Example 1> In Example 1, the structure was changed so that the number of protrusions formed on the back side was formed in all wales. The thickness immediately after knitting was 1.4 mm. The same processing as in Example 1 was performed to obtain a knitted fabric for vehicle interior. The density of the obtained knitted fabric was 35 wales / inch and 32 courses / inch, and the weight was 535 g / m 2 , the thickness was 2.3 mm. The elongation rate under a constant load was 6.8% in the warp direction and 7.6% in the weft direction, and the setting rate under a constant load was 1.8% in the warp direction and 2.6% in the weft direction. The Taber abrasion was grade 3, and the KESWC value was 4.8 gf*cm / cm 2 , the KESRC value was 44.5%. The thickness and surface physical properties were good, but the fabric became hard and the elongation rate deteriorated. There were also price issues due to the increase in the areal density, and the overall evaluation was "×".

[0044] <Comparative Example 2> In Example 1, the water-soluble fiber was changed to a polyester filament textured yarn. The thickness immediately after knitting was 1.2 mm. The same processing as in Example 1 was performed to obtain a knitted fabric for vehicle interior. The density of the obtained knitted fabric was 34 wales / inch and 32 courses / inch, and the weight was 395 g / m 2, the thickness was 1.4 mm. The elongation at a specified load was 22.8% in the warp direction and 26.8% in the weft direction, the setting rate at a specified load was 3.6% in the warp direction and 5.8% in the weft direction, the Taber abrasion was grade 4, and the KESWC value was 2.3 gf*cm / cm 2 , the KESRC value was 28.5%. Since protrusions could not be formed on the back side, it had poor cushioning properties. The overall evaluation was "×".

[0045] <Comparative Example 3> In Example 1, the formation of protrusions on the back side was changed in texture every 4 wales. The thickness immediately after knitting was 1.1 mm. The same processing as in Example 1 was performed to obtain a knitted fabric for vehicle interiors. The density of the obtained knitted fabric was 38 wales / inch and 34 courses / inch, and the weight was 428 g / m 2 , the thickness was 1.6 mm. The elongation at a specified load was 21.2% in the warp direction and 24.6% in the weft direction, and the setting rate at a specified load was 4.2% in the warp direction and 4.9% in the weft direction. The Taber abrasion was grade 3, and the KESWC value was 3.6 gf*cm / cm 2 , the KESRC value was 33.6%. Although the thickness was insufficient and the surface physical properties and stretchability were good, the cushioning properties were poor. The overall evaluation was "×".

[0046] <Reference Example 1> To compare the compression characteristics of the soft urethane foam with those of the examples of the present invention, a soft urethane foam, product number EL-67F, with a thickness of 2.0 mm, manufactured by Inoac Corporation, which is generally used for automotive interior materials, was prepared, and the KES compression characteristics were measured. The KESWC value was 4.9 gf*cm / cm 2 , the KESRC value was 43.2%.

[0047]

Table 1

[0048] The knitted fabric for vehicle interiors obtained as described above was evaluated based on the following evaluation methods.

[0049] <Thickness Measurement Method> Using a microscope (manufactured by KEYENCE CORPORATION, digital microscope VHX-6000), the cross-section in the width direction of the skin material was observed, and the width after knitting of the skin material and the total thickness of the product were measured.

[0050] <Elasticity measurement method> The constant load elongation rate and set rate were measured using a constant load elongation test apparatus manufactured by Dainippon Scientific Co., Ltd. Three test pieces with a width of 80 mm and a length of 250 mm were prepared for both the longitudinal and transverse directions. A load of 10 Kgf (98.1 N) was applied to the lower side with a gripping interval of 150 mm. After 10 minutes, the distance between the gauge marks was measured and recorded, and then the post-load was removed. The distance between the gauge marks 10 minutes after unloading was measured, and the constant load elongation rate (%) and constant load set rate were calculated using the following formulas. The average value of the three pieces was used as the data. Constant load elongation rate (%) = [(L1 - L0) / L0] × 100 Constant load set rate (%) = [(L2 - L0) / L0] × 100 L0: Distance between gauge marks before the test (mm) L1: Distance between gauge marks 10 minutes after applying the load (mm) L2: Distance between gauge marks 10 minutes after unloading (mm) (Judgment criteria) The constant load elongation rate was considered qualified if it was 8.0% or more, and the constant load set rate was considered qualified if it was 8.0% or less.

[0051] <Surface physical property evaluation method> Using a Taber abrasion tester specified in JIS1096G - 2010, the test was conducted under the following conditions. The degree of abrasion on the surface of each test piece was visually examined, and the change in the appearance of the knitted fabric surface was evaluated according to the following judgment criteria. Judgment of "Grade 3" or above was considered qualified. Abrasion wheel No: CS - 10, load: 4.9 N, number of test rotations: 1000 times, rotational friction speed: approximately 70 rpm / min. (Judgment criteria) "Grade 5"... No abnormality. "Grade 4"... Slightly damaged. "Grade 3"... Damage can be seen, but no thread breakage is seen. "Grade 2"... Thread breakage is seen. "Grade 1"... The thread is worn through and the ground is exposed.

[0052] <Method for Evaluating Cushioning Property> In the compression test using the automated pure bending tester KES-FB3 manufactured by Kato Tech Co., Ltd., WC (compression energy) is the amount of work up to the maximum pressure. The larger this value, the easier it is to undergo compression deformation. RC (compression resilience) represents the recoverability when the fibrous fabric is compressed, and the closer the value is to 100, the better the recoverability from compression deformation. The method for measuring the compression characteristics is as follows. First, place the knitted fabric as a sample on the test bench, and from above the sample, use a copper pressure applicator with a circular plane having an area of 2 cm 2 to push it into the sample and compress it under the conditions of a speed of 0.002 cm / sec and a maximum compression stress of 50 gf / cm 2 . Based on the measurement data, calculate the WC value (compression energy) and the RC value (compression resilience) through numerical processing. As a reference example, the compression data of a soft urethane foam product number: EL-67F, thickness 2.0 mm, manufactured by Inoac Corporation was measured, and the criteria for judgment were determined as follows. (Judgment Criteria) WC value: 4.0 gf*cm / cm 2 or more and RC value: 35% or more was considered qualified.

[0053]

Table 2

[0054] As is clear from Table 2, the knitted fabrics for vehicle interiors of Examples 1 to 3 according to the present invention are knitted fabrics for vehicle interior surface materials that are rich in stretchability and excellent in cushioning property by obtaining thickness through knitting structure and yarn usage, and thus do not require laminating a polyurethane foam on the back side. On the other hand, for the knitted fabric of Comparative Example 1, although it has thickness, its stretchability and cushioning property are inferior. For the knitted fabric of Comparative Example 2, since no protrusions are formed on the back side, it has no cushioning property. For the knitted fabric of Comparative Example 3, although it has stretchability, its cushioning property is inferior.

Industrial Applicability

[0055] The knitted fabric for vehicle interiors according to the present invention does not need to laminate a soft urethane foam on the back surface side, and is preferably used as a skin material for vehicle interiors because of its excellent stretchability and cushioning properties.

Explanation of reference numerals

[0056] 1 ··· Skin material (skin material for vehicle interiors) 2 ··· Back yarn 1 (protruding yarn) 3 ··· Surface yarn 1 4 ··· Surface yarn 2 5 ··· Water-soluble fiber 6 ··· Soft urethane foam 7 ··· Lining material

Claims

Claim 1 A knitted fabric for vehicle interior, wherein the knitted fabric for vehicle interior is a double jersey, the double jersey is knitted including water-soluble fibers, and projections extending in the thickness direction of the knitted fabric rather than the thickness after knitting are formed every one wale on the back side where the water-soluble fibers are dissolved. The knitted fabric for vehicle interior is characterized by this. Claim 2 The knitted fabric for vehicle interior according to Claim 1, wherein the elongation rate under a constant load of the knitted fabric for vehicle interior is 8.0% or more and the setting rate under a constant load is 8.0% or less. Claim 3 The knitted fabric for vehicle interior has cushioning properties, and the WC value in the KES compression characteristics is 4.0 gf*cm / cm ２ The knitted fabric for vehicle interior according to claim 1 or claim 2, wherein the WC value in the KES compression characteristics is 4.0 gf*cm / cm or more, and the RC value in the KES compression characteristics is 35.0% or more. Claim 4 A method for manufacturing a knitted fabric for vehicle interior, wherein the knitted fabric for vehicle interior is knitted including water-soluble fibers, and includes a knitting process using a double jersey circular knitting machine, a drawing and reversing process by center cutting, and a process of dissolving the water-soluble fibers, and includes a heat setting process. By the heat setting process, projections extending in the thickness direction of the knitted fabric rather than the thickness after knitting are formed on the back side. The method for manufacturing a knitted fabric for vehicle interior is characterized by this.

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