JP2014088632A - Double raschel warp knitted fabric and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double raschel warp knitted fabric which prevents a knitting yarn used for tying a surface fabric and a back fabric from pulling from the surface fabric not only when being seated thereon but also when being scratched by a projection, and further can maintain abrasion resistance, namely, a double raschel warp knitted fabric having adequate scratch resistance.SOLUTION: The double raschel warp knitted fabric is formed by entangling a binding yarn knitted in a surface fabric and a binding yarn knitted in a back fabric with each other to bind the surface fabric and the back fabric. The binding yarn knitted in the surface fabric is formed by shrinking a shrinkable yarn. In addition, a fineness of the binding yarn knitted in the surface fabric is smaller than a fineness of the binding yarn knitted in the back fabric.

Description

  The present invention relates to a double raschel warp knitted fabric. Specifically, the present invention relates to a double raschel warp knitted fabric that has good scratch resistance and is suitably used as a skin material for vehicle interior materials and furniture.

  A warp knitted fabric with a three-dimensional structure in which the outer material and the lining are connected with connecting yarns, especially the double raschel warp knitted fabric knitted by a double raschel knitting machine having a two-row needle bed is excellent in cushioning, thickness retention and breathability. Because of its good seating feeling, it is widely used as a skin material for vehicle seats and chairs. In order to make the properties even better, monofilament yarn is usually used as the connecting yarn, but monofilament yarn has high rigidity, so it easily jumps out of the outer surface when seated, causing discomfort when touched, appearance and wear resistance There was a problem that the property was impaired.

  In order to solve such a problem, for example, in Patent Document 1, in a double knitted fabric composed of a front and back base material and a connecting yarn that connects both base materials, the connecting yarn is applied to at least one of the front and back base materials. Disclosed is a double knitted fabric that does not impair the feel, texture, and appearance of the ground knitting yarn material, because the loop portion of the connecting yarn does not easily protrude from the substrate surface by knitting with the stitch structure. Has been.

  Patent Document 2 includes a three-dimensional solid knitted fabric in which a front knitted fabric and a back knitted fabric are connected by a connecting yarn, at least the front knitted fabric is knitted into a through-hole structure, and the connecting yarn is a monofilament yarn. In a three-dimensional sheet, the surface knitted fabric is knitted with the ground knitting yarn and the fastening yarn, and the connecting yarn is fastened to the ground knitting yarn with the fastening yarn, so that the connecting yarn comes from the stitch of the surface knitted fabric to the surface side. A three-dimensional solid sheet that effectively prevents jumping out is disclosed.

  These knitted fabrics, specifically, double raschel warp knitted fabrics, have a temporary effect in terms of preventing the connecting yarns from jumping out from the outer surface when seated. However, the higher durability demanded in the recent automobile industry, for example, the point of preventing damage caused by pulling out the connecting thread when pulled by a hard protrusion such as a key or a hook metal fitting, so-called Considering the scratch resistance, the current situation is that a sufficient effect is not always obtained. For example, the one disclosed in Patent Document 1 is easily pulled out when it is caught by a protrusion because the connecting yarn is knitted on the front substrate. In addition, the one disclosed in Patent Document 2 is not knitted directly on the surface knitted fabric, but is not sufficiently fastened by the tightening yarn and the connecting yarn is not sufficiently fixed, so that the connection yarn is pulled by the projection. In some cases, it is easily pulled out. Scratch resistance can be a problem not only when monofilament yarn is used as the connecting yarn, but also when multifilament yarn or spun yarn is used. For example, in the case where the outer fabric is a knitted structure having an opening, when pressure is applied to the outer fabric, the connecting yarn is curved and protrudes into the opening, and when the outer yarn is pulled by a protrusion, the connecting yarn is easily pulled out. At this time, if a multifilament yarn or spun yarn is used as the connecting yarn, it is easy to bend because the rigidity is small, and it becomes easier to pull out.

  On the other hand, attempts to aggressively improve scratch resistance have been reported. For example, in Patent Document 3, two knitted fabrics, an upper knitted fabric composed of a connected knitting yarn and a base knitted yarn, and a lower knitted fabric composed of a base knitted yarn and a connected knitting yarn overlap with each other. Between the upper knitted fabric and the lower knitted fabric that are knitted together, the upper floating stitch of the connected knitting yarn raised from the upper knitted fabric and the lower floating knitted stitch of the connected knitting yarn raised from the lower knitted fabric are intertwined in a chain shape In the double knitted fabric in which the upper knitted fabric and the lower knitted fabric are inseparably integrated and the upper knitted fabric is knitted in a mesh shape with a gap between the stitch rows and the stitch rows, By making the distance from the outer surface of the upper knitted fabric reaching the entanglement point 1 mm or less and shorter than the distance from the outer surface of the lower knitted fabric reaching the entanglement point, the fibers of the upper knitted fabric There is disclosed a double knitted fabric that is prevented from being fluffed or pilled by being scraped off the tip of a male surface fastener.

  However, since the double knitted fabric used as the skin material is thin, it is not easy to control the position of the entanglement point in a narrow space between the upper knitted fabric and the lower knitted fabric, and stable quality and effects cannot be expected. Met. Further, since the upper knitting stitch is not tightened with the lower floating knitting stitch, the connecting knitting yarn is not sufficiently fixed, and there is a possibility that the connecting knitting yarn is easily pulled out when it is pulled by the projection. .

International Publication No. 2002/050352 Pamphlet JP 2001-234456 A JP 2008-69498 A

  The present invention has been made in view of such a situation, and the knitting yarn for connecting the outer material and the lining material is not pulled out from the outer material not only when sitting, but also when pulled by a protrusion, It is an object of the present invention to provide a double raschel warp knitted fabric capable of maintaining wear resistance, that is, a double raschel warp knitted fabric having good scratch resistance.

  The present invention is a double raschel warp knitted fabric in which the binding material knitted on the outer fabric and the binding yarn knitted on the lining are entangled with each other, and the knitted fabric is knitted on the outer fabric. A double raschel warp knitting characterized in that the binding yarn is obtained by shrinking a shrink yarn, and the fineness of the binding yarn knitted on the outer fabric is smaller than the fineness of the binding yarn knitted on the lining. It is the earth.

  It is preferable that the dry heat shrinkage rate at 190 ° C. of the shrink yarn knitted into the outer fabric as the binding yarn is 12 to 70%.

  Further, the present invention knitted so that the binding yarn made of shrink yarn knitted on the outer fabric and the binding yarn knitted on the outer fabric are entangled with each other, and then the heat treatment is performed by heat treatment. A method for producing a double raschel warp knitted fabric for shrinking a shrink yarn, wherein the fineness of the binding yarn knitted on the outer fabric is smaller than the fineness of the binding yarn knitted on the lining It is a manufacturing method of the ground.

  According to the present invention, there is provided a double raschel warp knitted fabric that can maintain wear resistance without being pulled out of a surface material not only when seated but also when pulled by a protrusion. be able to. The double raschel warp knitted fabric of the present invention does not cause discomfort caused by touching the pulled-out yarn due to its good scratch resistance, and is used as a skin material for vehicle interior materials and furniture, particularly vehicle seats and chairs. It can be suitably used as a skin material.

It is the schematic which shows the principal part of a double Russell knitting machine. It is the schematic which shows the cross-section of the double raschel warp knitted fabric of this invention. It is a top view which shows the shape of the test piece with which it uses for a scratch resistance test. 1 is a knitting structure diagram of a double raschel warp knitted fabric of Example 1. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The double raschel warp knitted fabric of the present invention is knitted using a double raschel knitting machine having two rows of needle beds NB1 and NB2 as shown in the side view of FIG. In FIG. 1, N1 and N2 are front and rear knitting needles (needles) arranged in parallel in the knitting machine width direction, T1 and T2 are front and rear needle hooks (trick plates), and K1 to K6 are guide portions of the hooks L1 to L6. The knitting yarn passed through G1 to G6 is shown. B1 to B6 indicate beams of the respective knitting yarns.

  In the knitting by the double raschel knitting machine of FIG. 1, for example, the knitting yarns K1, K2 supplied from the beams B1, B2 are used as the ground yarn, and the yarn is guided to the needle N1 by the ridges L1, L2, and the lining B Organize. On the other hand, using the knitting yarns K5 and K6 supplied from the beams B5 and B6 as the ground yarn, the yarn is guided to the needle N2 by the heels L5 and L6, and the surface fabric F is knitted into a required knitting structure. Then, the knitting yarn K3 supplied from the beam B3 is used as a binding yarn, the knitting yarn K4 supplied from the beam B4 is used as the binding yarn, the knitting yarn K4 supplied from the beam B4 as the binding yarn, and the binding yarn K3 is connected to the needle N1 as the binding yarn. , K4 is introduced so as to cross when viewed from the side of the knitting machine, and each is knitted into a desired knitting structure, so that the binding yarns K3 and K4 are entangled with each other, and the binding yarn K3 is knitted into the outer fabric F. The binding yarn K4 is knitted into the lining B. At this time, the fineness of the binding yarn K3 is smaller than the fineness of the binding yarn K4. Thus, the outer fabric F and the lining fabric B are connected to each other by the connecting yarns K3 and K4, and the double raschel warp knitted fabric D is knitted. The fineness of the present invention refers to the total fineness (yarn fineness).

  As is clear from the cross-sectional view of the double raschel warp knitted fabric shown in FIG. 2, the double raschel warp knitted fabric D obtained by the knitting method described above is composed of the binding yarn K3 knitted on the outer fabric F. And the binding yarns K4 knitted on the lining B are entangled with each other, thereby being connected to each other. Here, the binding yarn K3 knitted into the outer fabric F is a shrink yarn and has a fineness smaller than the fineness of the binding yarn K4. The binding yarn K3, which is a shrink yarn, is contracted by the subsequent heat treatment, and the binding yarn K4 knitted on the lining B is tightened. 2 schematically shows that the binding yarn K3 hangs down on the back surface of the outer fabric F in a loop shape, but in actuality, the binding yarn K3 contracts to form the outer fabric F and the outer fabric F. It is integrated. For this reason, the tangled connection point of the binding yarn K3 and the binding yarn K4 is also integrated with the outer surface F on the back surface of the outer surface F. Thus, the binding yarn K4 knitted on the lining B is locked to the back surface of the outer fabric F without being exposed on the surface of the outer fabric F. The binding yarn K4 is not exposed on the surface of the outer fabric F, and the binding yarn K3, which is a contraction yarn, contracts on the inner side (back surface side) of the outer fabric F and the stitches of the outer fabric F (the binding yarn K3 and the main yarn). Since the stitch formed by K5 and K6 is tightly tightened, the projection does not enter the stitch even if it is pulled by the projection. For this reason, the binding yarns K3 and K4 are not pulled out from the outer fabric F, and become a double raschel warp knitted fabric having good scratch resistance. The stitch of the present invention is a needle loop.

  In the example of FIG. 1, the case where the outer material and the lining material are each knitted by the ground yarn guided by two ridges is not limited to this, but one or three or more It may be knitted with a ground yarn guided by the cocoon.

  Hereinafter, a specific configuration of each knitting yarn will be described. In the following explanation, “the binding yarn knitted on the outer material” is “front-side binding yarn”, “the binding yarn knitted on the lining” is “back-side binding yarn”, and “the main yarn knitting the outer material” is “front side” The “ground yarn” and the “ground yarn for knitting the lining” may be referred to as “the back side yarn”.

First, the binding yarn knitted into the outer material will be described.
As described above, the front-side binding yarn is required to be a shrink yarn. Here, the shrinkage yarn refers to a yarn that exhibits shrinkage characteristics under conditions where heat such as dry heat or wet heat is applied. The degree of the shrinkage property is not particularly limited as long as the above-described effect by shrinkage is obtained, but preferably the dry heat shrinkage at 190 ° C. is 12 to 70%, more preferably 30 to 50%. It is. When the dry heat shrinkage at 190 ° C. is less than 12%, the stitch becomes loose, and the back side binding yarn cannot be sufficiently locked to the back side of the outer material, and the front side is And there is a risk that both the connecting yarns on the back side will be pulled out. The upper limit of 70% is the upper limit of what is currently marketed as shrink yarns, and this is not the case when shrink yarns with a dry heat shrinkage rate exceeding 70% at 190 ° C are marketed in the future. .

The dry heat shrinkage at 190 ° C. is calculated by the following method. That is, after measuring the sample length (L ₀ ) under a load of 30 mg / dtex, the yarn is left in a dryer at 190 ° C. for 1 minute under no load. After the treatment, the sample length (L ₁ ) is measured under a load of 30 mg / dtex, and the dry heat shrinkage at 190 ° C. is calculated from (L ₀ -L ₁ ) / L ₀ × 100 (%).

It is important that the fineness of the binding yarn knitted on the outer material is smaller than the fineness of the binding yarn knitted on the lining. As described above, the front-side binding yarn that is a shrink yarn has a role of locking the back-side binding yarn to the back side of the front material. The thread to be locked shrinks, the loop becomes smaller, and the thread is thinner than the thread to be locked, so there is no gap between the thread to be locked and the thread to be locked, and the back side binding thread that is locked It is easy to lock and there is less shift.
Furthermore, the ratio of the fineness of the binding yarn knitted on the outer surface to the fineness of the binding yarn knitted on the lining is preferably 6 to 67%, and more preferably 15 to 59%. preferable. If it is less than 6%, the front-side binding yarn is too thin compared to the back-side binding yarn, and the force for locking the back-side binding yarn is not easily transmitted to the back-side binding yarn and may not be locked. If it exceeds 67%, a gap is formed between the front-side binding yarn and the back-side binding yarn, and there is a possibility that it is not fixed sufficiently.

  The form of the shrink yarn is preferably a multifilament yarn or a spun yarn because it is difficult to jump out from the outer surface when seated.

  The fineness of the shrink yarn is not particularly limited as long as the above-described effects can be obtained, but is preferably 22 to 330 dtex (decitex), more preferably 33 to 167 dtex. If the fineness is less than 22 dtex, the binding yarn is insufficient in strength, and there is a risk that the outer material and the lining material will peel off. When the fineness exceeds 330 dtex, when the shrink yarn knitted on the outer surface as a binding yarn jumps out of the outer surface, or when the stitch becomes large and is pulled by a projection, both the front and back binding yarns are pulled out. There is a risk of being. Note that the fineness of the shrink yarn refers to the fineness of the shrink yarn in an unshrinked state. Although the shrinkage yarn increases the fineness by shrinkage, if the fineness before shrinkage is 22 to 330 dtex, the above-mentioned problems are not caused after shrinkage.

  In addition, the ratio of the fineness of the shrink yarn, that is, the fineness of the front-side bound yarn to the fineness of the front-side ground yarn constituting the stitch of the front material is preferably 10 to 55%, Preferably it is 10 to 40%. If the ratio is less than 10%, the outer material and the lining material cannot be sufficiently bonded, and the outer material and the lining material may be peeled off. When this ratio exceeds 55%, when the shrink yarn knitted on the outer material as the binding yarn is excessively exposed on the surface of the outer material and is pulled by the projection, both the front and rear binding yarns are pulled out. There is a fear. In addition, “the front side ground yarn constituting the stitch of the front side” means that the front side ground yarn knitted as the insertion yarn is not included. In addition, the “fineness of the front ground yarn constituting the stitch of the outer fabric” in the case where the stitch of the outer fabric is composed of the front ground yarn guided by a plurality of ridges is the front side fabric guided by the plurality of ridges The total value of the fineness of the yarn. For example, in the example of FIG. 1, when both the front side yarns K5 and K6 constitute a stitch, the total value of the fineness of the front side yarn K5 and the fineness of the front side yarn K6 is used.

  The material of the shrink yarn is not particularly limited as long as it exhibits the shrink property, but is preferably polyester.

  In the present invention, two or more kinds of shrink yarns having different shrinkage rates, forms, finenesses, materials, and the like may be used in combination as the front side binding yarns.

Next, the binding yarn knitted into the lining will be described.
The form of the back side bound yarn is not particularly limited, and may be any of monofilament yarn, multifilament yarn, and spun yarn. Of these, monofilament yarn is preferred from the viewpoint of cushioning properties and thickness retention. If the back side binding yarn is a monofilament yarn, the rigidity of the double raschel warp knitted fabric can be maintained due to its rigidity, and sufficient cushioning properties can be obtained.

  The fineness of the back side bound yarn is preferably 22 to 550 dtex, more preferably 33 to 360 dtex. If the fineness is less than 22 dtex, sufficient cushioning and thickness retention properties may not be obtained, or the binding yarn may not have sufficient strength, and the surface and the lining may peel off. When the fineness exceeds 550 dtex, there is a risk that the texture and feel will be roughly cured or the knitting property may be deteriorated.

  The material of the back side binding yarn is not particularly limited. For example, synthetic fibers such as polypropylene, polyester, polyamide, polyacrylonitrile, semi-synthetic fibers such as acetate, regenerated fibers such as rayon and cupra, wool, silk, cotton And natural fibers such as hemp. Among these, polyester is preferable from the viewpoint of strength, heat resistance, and light resistance.

  In the present invention, two or more types of yarns having different forms, finenesses, materials, and the like may be used in combination as the back side binding yarn. A yarn other than the shrink yarn is preferably used. As described above, the back-side bound yarn is preferably a monofilament yarn in terms of cushioning properties and thickness retention. However, when a particularly soft texture or touch is required, it is preferable to use multifilament yarn or spun yarn for a part. At this time, the ratio of the number of multifilament yarns or spun yarns to the number of backside bound yarns is preferably 5 to 50%, more preferably 10 to 40%. If this ratio is less than 5%, there is a possibility that the soft texture and feel of the multifilament yarn and spun yarn cannot be obtained sufficiently. When this ratio exceeds 50%, there is a possibility that cushioning properties and thickness retention by the monofilament yarn cannot be sufficiently obtained.

Next, the ground yarn for knitting the outer material will be described.
The form of the front side ground yarn is not particularly limited, and may be any of monofilament yarn, multifilament yarn, and spun yarn. Of these, a multifilament yarn or a spun yarn is preferable from the viewpoint of texture and touch. Furthermore, these may be processed to give bulkiness.

  The fineness of the front ground yarn is preferably 56 to 550 dtex, more preferably 110 to 440 dtex. When the fineness is less than 56 dtex, the front-side binding yarn cannot be sufficiently concealed, and the binding yarn is easily exposed on the surface of the outer material. There is a possibility that both the connecting yarns are pulled out. Moreover, there exists a possibility that the intensity | strength of a double raschel warp knitted fabric may become inadequate. If the fineness exceeds 550 dtex, the texture and feel of the double raschel warp knitted fabric may be coarsely cured or the knitting property may be deteriorated.

  The material of the front side ground yarn is not particularly limited, for example, synthetic fibers such as polypropylene, polyester, polyamide, polyacrylonitrile, semi-synthetic fibers such as acetate, regenerated fibers such as rayon and cupra, wool, silk, cotton, And natural fibers such as hemp. Among these, polyester is preferable from the viewpoint of strength, heat resistance, and light resistance.

  In the present invention, as the front side ground yarn, two or more types of yarns having different forms, finenesses, materials and the like may be used in combination.

  The remaining back side ground yarn is the same as the front side ground yarn.

The double raschel warp knitted fabric of the present invention is knitted by each knitting yarn described above.
The knitting structure of the outer material is not particularly limited, and examples thereof include a chain knitting structure, an insertion structure, a denby knitting structure, and a cord knitting structure. Limited) or an appropriately combined knitting structure. In order to make the scratch resistance better, it is preferable that the protrusions are slippery and are not easily caught. For this purpose, a knitted structure with less unevenness is preferable. For example, in a knitted structure having an opening and a knitted structure not having an opening, the knitted structure having no opening has less irregularities and better scratch resistance.

  On the other hand, as a skin material for vehicle interior materials and furniture, a knitted structure having an opening tends to be preferred from the viewpoint of design. According to the present invention, even a knitted structure having an opening can be provided with practically satisfactory scratch resistance. This is preferable because the knitting structure is less likely to intrude into the protrusions with less fine irregularities in the course direction (width direction) due to the above. In particular, the combination of the chain stitch structure and the insertion structure has a flattened surface and can prevent the intrusion of the protrusions, as compared with those using a denby knitting structure or a cord knitting structure. Of course, it is also possible to use an insertion tissue as a part of the knitting structure having no opening.

  The knitting structure of the lining is not particularly limited, and can be the same knitting structure as the knitting structure of the outer material.

  The double raschel warp knitted fabric after knitting (in a state called “raw machine”) undergoes normal processes such as scouring, pre-setting, dyeing, finishing setting, etc. It is provided as a skin material for car seats and chairs.

Here, the double raschel warp knitted fabric of the present invention can be manufactured by heat-treating the double raschel warp knitted fabric to contract the shrink yarn. A conventionally known apparatus such as a loop steamer, a loop dryer, a cylinder dryer, a non-touch dryer, a net dryer, an oven, a tenter, or a pin tenter can be used for the heat treatment. Among these, a pin tenter is preferable from the viewpoint of processing stability.
The timing of the heat treatment is preferably a so-called preset, in which the heat treatment is performed before the dyeing and finishing set steps.

  The presetting conditions vary depending on the shrinkage rate and stress of the shrink yarn, but are preferably 170 to 220 ° C. for 30 to 90 seconds. If the treatment temperature is less than 170 ° C., the double raschel warp knitted fabric may not be set sufficiently, the shrink yarn may not be sufficiently contracted, or color unevenness may occur during dyeing. When the treatment temperature exceeds 220 ° C., the texture and feel of the double raschel warp knitted fabric may be roughly cured, or color unevenness may occur during dyeing. A more preferable treatment temperature is 180 to 200 ° C. On the other hand, if the treatment time is less than 30 seconds, the double raschel warp knitted fabric may not be sufficiently set, or the shrink yarn may not be sufficiently contracted. When the processing time exceeds 90 seconds, the process load is large and the manufacturing cost may be increased. A more preferable processing time is 50 to 70 seconds.

Thus, the double raschel warp knitted fabric of the present invention can be obtained.
The density of the double raschel warp knitted fabric is preferably 16 to 65 courses / 2.54 cm and 16 to 40 wells / 2.54 cm. When the density is less than the lower limit, when the projection is pulled by the projection, the projection is liable to enter the stitch, and there is a possibility that both the front side and the back side binding yarns are pulled out. When the density exceeds the upper limit value, the texture and feel of the double raschel warp knitted fabric may be coarsely cured or the knitting property may be deteriorated.

  The thickness of the double raschel warp knitted fabric is preferably 1.5 to 5.0 mm, more preferably 1.5 to 3.0 mm. If the thickness is less than 1.5 mm, sufficient cushioning properties may not be obtained, or the texture and feel may be roughly cured. If the thickness exceeds 5.0 mm, the outer material and the lining are displaced, and the wear resistance may be impaired. Further, the effect of the present invention is particularly obtained on a thin fabric in which the position of the entanglement point is difficult to control, for example, a warp knitted fabric having a thickness in the range of 1.5 to 2.0 mm.

  The obtained double raschel warp knitted fabric is used as a skin material for vehicle interior materials or furniture. From the viewpoint of scratch resistance, the warp knitted fabric of the present invention is used with the outer surface of the skin material.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example. In addition, each evaluation test in an Example followed the following method.

(1) Scratch resistance Three test pieces each having a width of 50 mm and a length of 220 mm were taken from the warp direction (well direction) and the weft direction (course direction), cut into the shape shown in FIG. Fix to machine I type (clock meter, manufactured by Daiei Chemical Seiki Seisakusho Co., Ltd.).
A 25 mm square hook-and-loop fastener (YKK Croclon ADN mushroom type, YKK) is attached to the tip of the friction element. Reciprocates 6 times at a minute speed. The state of the test piece after rubbing was visually observed and graded according to the following criteria. Further, grade 4 or higher was judged as “◯”, grade 3 as “Δ”, grade 2 or lower as “x”.
Grade 5: No change in appearance, no yarn pulled out Grade 4: A change in appearance was observed slightly, but the yarn was not pulled out Grade 3: Change in appearance was observed, and the yarn was pulled out slightly 2 Grade: Appearance change is clearly recognized and the yarn is pulled out Grade 1: Appearance change is extremely significant and the yarn is pulled out

(2) Abrasion resistance One test piece with a width of 70 mm and a length of 300 mm was taken from the warp direction and the weft direction, and a urethane foam with a width of 70 mm, a length of 300 mm and a thickness of 10 mm was attached to the back surface. Then, it is fixed to a flat abrasion tester T-TYPE (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd.). A load of 9.8 N is applied to the friction element covered with cotton canvas, and the specimen is worn back and forth 10,000 times at a speed of 60 reciprocations per minute between 140 mm on the surface of the test piece. During this period, the cotton canvas is changed every 2500 reciprocations. The state of the test piece after abrasion was visually observed and judged according to the following criteria.
○: Almost no change in appearance △: Some change in appearance was observed and fraying occurred ×: Change in appearance was observed, fraying and tearing occurred

[Example 1]
Using a double raschel knitting machine (RD6DPLM-77E-22G, manufactured by KARL MAYER), as shown in FIG. 4, the lining is knitted with the back side ground yarn guided to the heels L1 and L2, and the heels L5 and L6 are formed. A front knitted fabric is knitted with the introduced front side ground yarn, and a double raschel warp knitted fabric is knitted by connecting the front side and the lining with the back side binding yarn introduced to the heel L4 and the front side binding yarn introduced to the heel L3. .

  At this time, the lining is knitted with a back side ground yarn (167 dtex / 48f polyester multifilament yarn) guided to the heel L1 in a full set, and the back side ground yarn underwrap is between 3 stitches, This is a knitted structure having no opening, which is combined with a chain knitted structure knitted by a back side ground yarn (167 dtex / 48f polyester multifilament yarn) guided by L2 in a full set.

  In addition, the outer material is a chain knitted structure knitted by the front side ground yarn (330 dtex / 144f polyester multifilament yarn) guided by a full set to the heel L5, and 1 in 3out (one thread insertion, three yarn removal) on the heel L6 This is a knitted structure having an opening combined with an insertion structure knitted by a front side ground yarn (330 dtex / 144f polyester multifilament yarn) guided by an arrangement).

  Also, back side binding yarn (110 dtex / 36f polyester monofilament yarn) and front side binding yarn (44 dtex / 12f polyester multifilament shrink yarn, dry heat shrinkage at 190 ° C. 50%, fineness of front side binding yarn with respect to back side binding yarn 40.0%) was entangled with each other and knitted into the outer material or the lining material, and joined the outer material and the lining material.

  The raw machine of the obtained double raschel warp knitted fabric was heat-treated at 190 ° C. for 1 minute and preset, and then dyed at 130 ° C. for 30 minutes with a liquid dyeing machine. Next, this double raschel warp knitted fabric is heat-treated at 150 ° C. and dried, and then heat-treated at 190 ° C. for 1 minute to carry out a finishing set, thickness 1.5 mm, density 40 course / 2.54 cm, 23 well / 2.54 cm. Obtained a double raschel warp knitted fabric.

[Examples 2 to 5 and Comparative Example 1]
According to Table 1, a double raschel warp knitted fabric was obtained in the same procedure as in Example 1.

  Table 1 shows the results of evaluation of the double raschel warp knitted fabrics of Examples and Comparative Examples.

As is apparent from Table 1, Examples 1 to 3 were excellent in scratch resistance and wear resistance.
In Examples 4 and 5, since the ratio of the fineness of the front-side binding yarn (shrinkage yarn) to the fineness of the back-side binding yarn does not satisfy the preferred range, it is not sufficiently fixed to the front and back surfaces of the back-side binding yarn. Scratch resistance and abrasion resistance were slightly inferior.
In Comparative Example 1, the fineness of the front-side binding yarn (shrinkage yarn) is larger than the fineness of the back-side binding yarn, and the back-side binding yarn is not fixed to the front and back surfaces, and scratch resistance and abrasion resistance Was inferior.
When the warp knitted fabric obtained in Examples 1 to 5 was used for the vehicle interior material, the knitting yarn for connecting the outer material and the lining material was not pulled out from the outer material even when pulled by the protrusions. There was no discomfort caused by touching the drawn yarn, and the wear resistance could be maintained.

N1, N2 ... Knitting needles (needle)
T1, T2 ... Needle hook (trick plate)
K1, K2 ... Knitting yarn (Back side ground yarn)
K3 ... Knitting yarn (front side binding yarn)
K4 ... Knitting yarn (back side binding yarn)
K5, K6 ... Knitting yarn (front side binding yarn)
L1 to L6 ... 筬 G1 to G6 ... Guide B1 to B6 ... Beam B ... Lining F ... Outer material D ... Double Russell warp knitted fabric

Claims (3)

  A double raschel warp knitted fabric in which the outer fabric and the lining are joined by interlacing the binding yarn knitted on the outer fabric and the binding yarn knitted on the outer fabric, and the binding yarn knitted on the outer fabric is A double raschel warp knitted fabric obtained by shrinking a shrink yarn and having a fineness of the binding yarn knitted on the outer fabric smaller than that of the binding yarn knitted on the lining.   The double raschel warp knitted fabric according to claim 1, wherein the shrinkage yarn knitted into the outer fabric as a binding yarn has a dry heat shrinkage at 190 ° C of 12 to 70%.   Double that shrinks the shrink yarn by heat treatment after knitting so that the binding yarn made of shrink yarn knitted on the outer fabric and the binding yarn knitted on the lining are entangled with each other so that the outer fabric and the lining are bound A method for producing a double raschel warp knitted fabric, characterized in that the fineness of the binding yarn knitted on the outer fabric is smaller than the fineness of the binding yarn knitted on the lining.

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