JP2019001091A - Knitted fabric and synthetic resin laminate using the knitted fabric as a base fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric which prevents rudling, improves a yield in a perforating process and a sewing machine sewing process, and has an excellent volume and texture, and a synthetic resin laminate based on the knitted fabric. SOLUTION: At least one course consisting of loops knitted by a knitting yarn having a large elongation and at least one course consisting of a loop knitted by a knitting yarn having a small elongation are alternately knitted and knitted by the knitting yarn having a large elongation. A knitted fabric characterized in that the loop is a kind of interlock knitted fabric in which the loop length is knitted longer than that of a loop knitted by a knitting yarn having a small elongation, and a synthetic resin laminate based on this knitted fabric. body. [Selection diagram] Fig. 1

Description

  The present invention relates to a knitted fabric used as a base fabric for synthetic leather and synthetic leather used as clothing, synthetic leather and imitation leather, automobile interior materials, automobile seats, and furniture skin materials. Further, the present invention relates to a synthetic resin laminate in which synthetic resin films such as polyurethane, polyolefin, polyamide, polyamino acid resin, acrylic resin, and polyvinyl chloride are laminated.

  Conventionally, knitted base fabrics, for example, knitted fabrics used as base fabrics for synthetic resin laminates used for automobiles, have been used polyester / rayon blended yarns, and these knitted fabrics are used as base fabrics such as polyurethane, polyolefin, and vinyl chloride resin. Synthetic leather, artificial leather and synthetic resin leather were made by laminating synthetic resin film. However, in recent years, double-sided knitted fabrics using long fiber yarns have been used as the knitted fabrics under the demand for further improvement in texture and quality. However, a knitted fabric composed of a double-sided knitted fabric using the long fiber yarn, for example, a mock, picket, royal interlock, has a heavy weight or a low productivity compared to a simple interlock. Further, in a simple interlock knitted fabric, when the yarn is stretched in the horizontal direction, the long fiber yarn is stretched to cause so-called “wire transmission” due to loop detachment, thereby destroying the knitted fabric structure and impairing workability. was there.

  On the other hand, Patent Document 1 describes a synthetic resin leather having a small difference in elongation between the vertical direction and the transverse direction and having a good texture. However, the knitted fabric of the present invention is a knitted fabric composed of an interlock knitted fabric knitted from a knitted yarn having a large elongation and a knitted yarn having a small elongation, and the interlock knitted fabric is a knitted yarn having a large elongation. Whereas the base fabric used for the synthetic resin leather described in Patent Document 1 is knitted with a small stretch, the first yarn made of cellulosic fibers and the crimped yarn of long fibers, Knit with a second yarn of a kind of thermoplastic elastomer long fiber or polyurethane long fiber, and the loop formed by the second yarn is continuous in the warp direction, weft direction and front and back of the base fabric Further, the synthetic resin leather of Patent Document 1 is intended to prevent wrinkles and deformation, whereas the present invention mainly aims to prevent the laddering of the synthetic resin leather. Both differ in terms of the effect of yarn quality, knitted knitting structure and the invention knitted in point.

JP-A-2005-23448

  In order to solve the above-mentioned problems, the present inventor has intensively studied and reached the present invention, and the object of the present invention is to solve the above-mentioned problems and use the long fiber yarn. Instead of a simple interlock knit, for example, a loop formed by combining a yarn with a large elongation made of false-twisted yarn of a long fiber and a yarn with a small elongation made of a drawn yarn, etc. By forming an interlock knitted fabric knitted with a loop length shorter than that of a loop knitted with a large yarn, even if the knitted base fabric is stretched in either the vertical or horizontal direction, the stretch A small knitting yarn suppresses excessive elongation of a large knitting yarn to prevent laddering due to loop loss, and the texture of the knitting yarn is retained by a large elongation. The present invention is to provide an interlock knitted and synthetic resin laminate to the knitted and base fabric excellent in strength and texture by suppressing the generation of laddering.

In the synthetic resin laminate comprising a synthetic resin layer and a base fabric, the base fabric is a knitted fabric composed of an interlock knitted fabric knitted from a knitting yarn having a large elongation and a knitting yarn having a small elongation, and the interlock knitted fabric is The knitting yarn with a large elongation and a knitting yarn with a small elongation are knitted,
And at least one course consisting of loops knitted by the knitting yarn having a large elongation and at least one course consisting of loops knitted by the knitting yarn having a small elongation are alternately knitted,
The synthetic resin laminate, wherein the loop knitted by the knitting yarn having a large elongation is a kind of interlock knitted fabric knitted with a loop length longer than the loop knitted by the knitting yarn having a small elongation. Let it be the body.

  The knitting yarn having a large elongation for knitting the interlock knitted fabric is selected from a stretchy bulky yarn made of long fibers and a long yarn of a plastic elastomer, and the knitting yarn having a small elongation is a fully drawn yarn. (FDY), spin-drawn drawn yarn (SDY), pneumatically processed yarn (ATY), drawn deformed yarn (DTY), and highly oriented yarn (HOY) A laminate is used.

  In the knitted fabric, the ratio Lb / La of the loop length Lb knitted by the knitting yarn B and the loop length La knitted by the knitting yarn A in the product after knitting is 1.05 to 2.5. It is preferable to use the synthetic resin laminate described above.

  The synthetic resin laminate is preferably characterized in that an adhesive layer is provided between the synthetic resin layer and the base fabric.

  Preferably, the synthetic resin layer is composed of a skin layer and a foamed layer.

In a knitted fabric used as a base fabric of a synthetic resin laminate, the knitted fabric is a knitted fabric composed of an interlock knitted fabric knitted from a knitting yarn having a large elongation and a knitting yarn having a small elongation. Knitting yarns with large elongation and knitting yarns with small elongation
And at least one course consisting of loops knitted by the knitting yarn having a large elongation and at least one course consisting of loops knitted by the knitting yarn having a small elongation are alternately knitted,
The knitted fabric is characterized in that the loop knitted by the knitting yarn having a large elongation is a kind of an interlock knitted fabric knitted with a loop length longer than a loop knitted by the knitting yarn having a small elongation. .

    The knitting yarn having a large elongation for knitting the interlock knitted fabric is selected from a stretchy bulky yarn made of long fibers and a long yarn of a plastic elastomer, and the knitting yarn having a small elongation is a fully drawn yarn. (FDY), spin drawn drawn yarn (SDY), air processed yarn (ATY), drawn deformed yarn (DTY), and highly oriented yarn (HOY), To do.

  In the knitted fabric, the ratio Lb / La of the loop length Lb knitted by the knitting yarn B and the loop length La knitted by the knitting yarn A in the product after knitting is 1.05 to 2.5. The knitted fabric is characterized by the above.

  The knitted fabric of the present invention is constructed as described above, and in a knitted fabric and a synthetic resin laminate using the knitted fabric as a base fabric, a knitted yarn having a small elongation even when the knitted fabric is stretched in the vertical or horizontal direction is a knitted fabric having a large elongation. Since the loop length is shorter than that of the yarn, it is possible to prevent the occurrence of laddering due to loop loss and to have an excellent texture. Such a texture is largely attributable to the configuration of the knitting yarn itself, and the texture can be adjusted by changing the ratio of the loop knitted by the knitting yarn having a large elongation. That is, by changing the knitting ratio of the knitting yarn having a small elongation and the knitting yarn having a large elongation, it is possible to improve the texture or to enhance the effect of suppressing the occurrence of laddering. Further, in any case, since the laddering is difficult as compared to the knitted yarn having a large elongation, the yield from the knitted fabric to the production of the synthetic resin laminate can be remarkably improved. In addition, since the knitted fabric is difficult to ladder, the synthetic resin laminate using the knitted fabric as a base fabric results in suppressing the occurrence of defects that cause the knitted seam to fray or tear from the seam during drilling or sewing. The yield in the perforating process and the sewing process of the sewing machine is improved.

  Next, the best mode for carrying out the present invention (hereinafter referred to as “embodiment of the present invention”) will be described with reference to representative drawings. However, the present invention is not limited by the embodiment of the present invention. FIG. 1 is a view showing a synthetic resin laminate comprising a synthetic resin layer and a base fabric according to an embodiment of the present invention. 1 is a synthetic resin laminate integrated with adhesive or heat fusion on one side of a knitted base fabric, 2 is a synthetic resin skin layer, 3 is a foam layer, and 4 is a knitted base fabric of an interlock knitted fabric. .

    A knitted fabric according to an embodiment of the present invention is used as a base fabric of a synthetic resin laminate, and the interlock knitted fabric includes a fully drawn yarn (FDY) belonging to the knitted yarn A having a small elongation, a spin draw Stretchy bulk processing consisting of any one of a type of drawn yarn (SDY), air-processed yarn (ATY), drawn deformed yarn (DTY), highly oriented yarn (HOY) and long fibers belonging to the knitting yarn B having a large elongation And at least one course consisting of loops continuously knitted by a knitting yarn A having a small elongation and a knitting yarn B having a large elongation. At least one course composed of loops to be knitted is knitted alternately. For example, a two-stage interlock knitted fabric shown in FIGS. 2 and 3 and a three-stage interlock knitted fabric shown in FIGS. 4 and 5 are used. In addition to the example shown in the present embodiment, for example, a multi-stage interlock knitted fabric having one or four or more stages, a knitting yarn A having a small elongation and two knitting yarns A and a knitting yarn B having a large elongation, such as four courses, A case where the number of continuous courses of the knitting yarn B is different is also included in the present invention. Further, in addition to the above, the loop knitted by the knitting yarn B having a large elongation is a kind of interlock knitted fabric in which the loop length is knitted longer than the loop knitted by the knitting yarn A having a small elongation. It is characterized by.

  FIG. 2 is a knitting diagram of a two-stage interlock knitted fabric according to the present invention, in which dials and cylinders are arranged with opposing long hands (2, 2 ′) and short hands (1, 1 ′) alternately. A dial-cylinder type interlock knitting method is illustrated. The first course (1) and the second course (2) are supplied with the knitting yarn A (11, 12) having a small elongation, and in the first course (1), the long needle (2, 2 ') is raised to catch the yarn. A loop is formed, and in the second course (2), the short hand (1, 1 ′) rises to catch the yarn and form a loop. Next, in the third course (3) and the fourth course (4), the knitting yarn B (21, 22) having a large elongation is supplied, and in the third course (3), the long needle (2, 2 ′) is raised and the yarn is raised. Is formed to form a loop, and in the fourth course (4), the short hand (1, 1 ′) is raised and the thread is captured to form a loop. This example shows an example in which the knitting yarn A having a small elongation and the knitting yarn B having a large elongation are alternately knitted every two courses.

  FIG. 3 is a structural diagram of the two-stage interlock knitted fabric. First, as shown in FIG. 3 (1), a loop formed by the knitting yarn A (11, 12) having a small elongation is the surface of the knitted fabric. 11, 12, 11, 12..., And the back surface has loops of knitting yarn A (11, 12) alternately on the front surface and back surface, such as 11 ′, 12 ′, 11 ′, 12 ′. It is continuously organized. Next, as shown in FIG. 3 (2), the loop of the knitting B (21, 22) is on the front surface of the knitted fabric, 21, 22, 21, 22,..., 21′22 ′, 21 ′, Like 22 '..., it is continuously knitted on the front and back surfaces alternately. Further, since the dial needle and the cylinder needle are arranged to face each other, the loops on the front surface and the back surface are symmetrical and overlap each other. The loop length of the loop knitted in the third course and the fourth course composed of the knitting yarn B having a large elongation is the loop loop knitted in the first course and the second course composed of the knitting yarn A having a small elongation. Long loops are knitted compared to the length. The size of the stitches is determined by the interval and size of the knitting needles arranged on the needle bed of the knitting machine and the amount of yarn drawn in when creating the stitches.

  FIG. 4 is a knitting diagram of a three-stage interlock knitted fabric according to the present invention, in which a long needle, a middle needle and a short needle intersecting each other with a half-pitch shift are alternately arranged on the dial and the cylinder. A knitting method using a dial / cylinder type interlock knitting machine is illustrated. In the first course (1), the second course (2) and the third course (3), the knitting yarn A (11, 12, 13) having a small elongation is supplied, and in the first course (1), the long needle (3, 3) is supplied. ') Rises and catches the thread to form a loop. In the second course (2), the middle needle (2, 2') rises and catches the thread and forms a loop. In the third course (3), the short needle ( 1,1 ′) rises and catches the thread to form a loop. Next, in the fourth course (4), the fifth course (5) and the sixth course (6), the knitting yarn B (21, 22, 23) having a large elongation is supplied, and in the fourth course (4), the long needle ( 3, 3 ′) rises to catch the thread to form a loop, and in the fifth course (5), the middle needle (2, 2 ′) rises to catch the thread to form a loop, and the sixth course (6) Then, the short hand (1, 1 ') rises and catches the thread to form a loop. In this example, a knitting yarn A having a small elongation and a knitting yarn B having a large elongation are alternately knitted every three courses. In this example, the long needle, the middle needle and the short needle intersect with the dial and the cylinder alternately with a half pitch shift, but the dial and the cylinder needle are arranged facing each other like the two-stage interlock knitted fabric. Needless to say, this is also included in the present invention.

    FIG. 5 is a structural diagram of a three-stage interlock knitted fabric according to the knitting method of FIG. 4. As shown in FIG. 5 (1), first, it is formed by knitting yarn A (11, 12, 13) having a small elongation. The loops to be formed are 11, 12, 13, 11, 12, 13... On the knitted surface, and 11 ′, 12 ′, 13 ′, 11 ′, 12 ′, 13 ′,. It is continuously knitted alternately on the front and back surfaces. Next, as shown in FIG. 5 (2), a loop formed by the knitting yarn B (21, 22, 23) having a large elongation is formed on the surface of the knitted fabric, 21, 22, 33, 21, 22, 33,. .... The back side is knitted alternately and continuously on the front side and the back side as 21 ', 22', 23 ', 21', 22 ', 23'. Further, since the dial needles and the cylinder needles are arranged so as to cross each other with a half-pitch deviation, the loops on the front surface and the back surface are symmetrical and have a structure with a half-pitch deviation. The loop lengths of the loops knitted in the fourth course, the fifth course and the sixth course made of the knitting yarn B having a large elongation are the first course, the second course and the third course made of the knitting yarn A having a small elongation. A loop longer than the loop length of the loop knitted at is knitted. The size of the stitches is determined by the interval and size of the knitting needles arranged on the needle bed of the knitting machine and the drawing amount of the yarn when making the stitches, as in the case of the two-stage interlock knitted fabric.

  FIG. 6 is a partially enlarged schematic view of a knitted fabric in which the knitting yarn A and the knitting yarn B according to the present invention are alternately knitted for each course. In FIG. 6, 11 and 12 represent a knitting yarn A having a small elongation, and 21 and 22 represent a knitting yarn B having a large elongation. A loop formed on the surface of the knitted fabric with the knitting yarn 11 is denoted by 11, a loop formed on the back surface is denoted by 11 ′, a loop formed on the front surface of the knitted fabric by the knitting yarn 12 is formed on the back surface, 12. This loop is represented by 12 ′. The knitting yarn B is also expressed according to the knitting yarn A. Further, La represents a loop length knitted with the knitting yarn A, and Lb represents a loop length knitted with the knitting yarn B. In the product after knitting, the ratio Lb / La of the loop length Lb knitted by the knitting yarn B and the loop length La knitted by the knitting yarn A is preferably 1.05 to 2.5. .3 to 2.0 is more preferable. If Lb / La is smaller than 1.05, the texture of the knitted fabric may be lost, and if it is larger than 2.5, the occurrence of laddering due to loop loss may not be sufficiently prevented. The above loop length or loop length ratio can be similarly applied to other interlock knitted fabrics of the present invention.

  Next, the knitting paste drawing process will be described. For example, when knitting with a dial / cylinder type interlock knitting machine, a cylindrical knitted fabric with the same front and back surfaces can be obtained. Then, the cylindrical knitted fabric is cut and laminated with a synthetic resin layer. Apply adhesive to the knitted surface. The pasting process comprises an adhesive coating process such as a roll coater, reverse roll coater, knife coater, etc., a drying process, and a scraping process. The adhesive is a solvent-based or aqueous ethylene-vinyl acetate copolymer adhesive. Polyvinyl chloride paste adhesives, two-component polyurethane adhesives, epoxy adhesives, and the like are used.

  Next, the synthetic resin laminate according to the embodiment of the present invention will be described. FIG. 1 is an enlarged longitudinal sectional view of a synthetic resin laminate in which the knitted fabric is used as a base fabric and a synthetic resin layer is laminated on one side of the knitted fabric. In this figure, 1 is a synthetic resin laminate, 2 is a synthetic resin skin layer, 3 is a foam layer, and 4 is a knitted fabric. The material of the synthetic resin skin layer 2 to the foamed layer 3 is not particularly limited, and for example, polyurethane, polyolefin, polyamide, polyamino acid resin, polyvinyl chloride, and the like are preferable. The method for producing the synthetic resin laminate of the present invention is not particularly limited. For example, the synthetic resin layer is preferably integrated with the knitted base fabric by calendering, T-die, sol coating or lamination. .

  As a synthetic leather manufacturing method, for example, in the case of a dry method, a release paper that is pre-shaped with a female mold is used on a silicon-treated or polyethylene-processed paper, and then a plastisol is applied by a reverse roll coater. After heating and heating with a heater, the base fabric is pasted between pasting rolls, pasted together, passed through a foaming furnace, cooled with a cooling roll, and wound separately by a product take-up roll and a release paper take-up roll. When the release paper is removed, a synthetic resin laminate having an embossed pattern on the surface is obtained. A knife coater may be used instead of the reverse roll coater.

Example 1
Next, examples will be described below. In the knitted fabric according to the embodiment of the present invention, a polyester-based drawn yarn (FDY) is used as the knitting yarn A having a small elongation, and a 150 denier false twist made of a long fiber of polyethylene terephthalate is used as the knitting yarn B having a large elongation. A two-stage interlock knitted fabric using processed yarn was obtained. In the knitted fabric obtained by the above embodiment, the knitting yarn A having a small elongation and the knitting yarn B having a large elongation are alternately knitted every two courses, and the loop of the knitting yarn B having a large elongation after knitting is performed. The ratio of the length Lb to the loop length La of the knitting yarn A having a small elongation was as follows.
Lb / La = 28.7 mm / 20.5 mm = 1.4
The knitted fabric was glued with an ethylene-vinyl acetate copolymer adhesive, and a polyurethane film was laminated on the glued surface by a dry method to obtain a synthetic resin laminate.

Example 2
A knitted fabric of the same knitted fabric as in Example 1 and a synthetic resin laminate using the knitted fabric as a base fabric was obtained except that the knitted fabric of the three-stage interlock knitted fabric was used instead of the knitted fabric of the two-stage interlock knitted fabric. In the knitted fabric obtained by the above embodiment, the knitting yarn A having a small elongation and the knitting yarn B having a large elongation are alternately knitted every two courses, and the loop of the knitting yarn B having a large elongation after knitting is performed. The ratio between the length Lb and the loop length La of the knitting yarn A having a small elongation is the same as that in the first embodiment.

Comparative Example 1
As a first comparative example, as in the conventional method, in Example 1 in the previous period, a two-stage using a polyester-based drawn yarn (FDY) as a knitted yarn A having a small elongation without using a knitted yarn B having a large elongation. Acquired interlocking knitting. Accordingly, the loop lengths of the knitted yarn after knitting all have the same length. The knitted fabric was glued with an ethylene-vinyl acetate copolymer adhesive, and a polyurethane film was laminated on the glued surface by a dry method to obtain a synthetic resin laminate.

Comparative Example 2
As a second comparative example, as in the conventional method, in Example 1, the knitting yarn A having a small elongation is not used, and the knitting yarn B having a large elongation is used as a knitting yarn B of 150 denier made of polyethylene terephthalate long fibers. A two-stage interlock knit using yarn was obtained. Accordingly, the loop lengths of the knitted yarn after knitting all have the same length. The knitted fabric was glued with an ethylene-vinyl acetate copolymer adhesive, and a polyurethane film was laminated on the glued surface by a dry method to obtain a synthetic resin laminate.

Comparative Example 3
In the comparative example 1, a knitted fabric similar to the comparative example 1 except that the knitted fabric of the three-stage interlock knitted was used instead of the knitted fabric of the two-stage interlock knitted fabric, and a synthetic resin laminate having the knitted fabric as a base fabric was obtained. .

<Effects Specific to Examples>
In the knitted fabric composed of the two-stage interlock knitting according to the first embodiment and the knitted fabric composed of the three-stage interlock knitted fabric according to the second embodiment, the knitting yarn A having a small elongation and the knitting yarn B having a large elongation are adjacent to each other. At the position where the course is engaged, for example, as shown in FIG. 6, any one of a sinker loop s (also called a “valley of loops connecting wales”) to a needle loop n (loop crest) made of knitting yarn A having a small elongation Even if a loop composed of knitting yarn B having a large elongation is sandwiched and tension is applied to the knitting yarn B having a large elongation, a very strong pulling force, that is, a knitting process, a lamination of a knitted base fabric and a synthetic resin Unless a strong pulling force is applied that is greater than the force that normally acts during the process, drilling or sewing, etc., the sinker loop s (joint) or needle loop n (leak) Mountains) portion of the flop effect of suppressing laddering phenomenon caused by escapes. On the other hand, in the case of the knitted fabrics of Comparative Example 1 and Comparative Example 3, it was confirmed that the laddering phenomenon occurred due to the above-described normal acting force. Further, in terms of the texture, Examples 1 and 2 were not much different from Comparative Example 2, and it was determined that they could be sufficiently replaced. Furthermore, the synthetic resin laminates 1 and 2 of the embodiment not only eliminate the defect that the knitted seam frays or tears from the seam in the sewing and punching process, but also contributes to the improvement of the efficiency of work efficiency. Confirmed to do.

  The knitted fabric according to the present invention and the synthetic resin laminate using the knitted fabric as a base fabric can respond to economic demands by preventing laddering without damaging the texture and improving the yield in drilling and sewing sewing. Moreover, it is extremely useful because it can be carried out by a conventional knitting machine and processing apparatus.

It is a partially expanded sectional view of the synthetic resin laminated body which uses the knitted fabric based on this invention as a base fabric. 1 is a knitting diagram of a two-stage interlock knitted fabric according to the present invention. It is an organization chart of the two-stage interlock knitted fabric concerning the present invention. It is a knitting diagram of a three-stage interlock knitted fabric according to the present invention. It is an organization chart of the three-stage interlock knitted fabric concerning the present invention. It is a partially expanded schematic diagram of the knitted fabric according to the present invention.

1: Synthetic resin laminate 2: Synthetic resin skin layer 3: Foamed layer 4: Knitted fabric

Claims (8)

In the synthetic resin laminate comprising a synthetic resin layer and a base fabric, the base fabric is a knitted fabric composed of an interlock knitted fabric knitted from a knitting yarn having a large elongation and a knitting yarn having a small elongation, and the interlock knitted fabric is The knitting yarn with a large elongation and a knitting yarn with a small elongation are knitted,
And at least one course consisting of loops knitted by the knitting yarn having a large elongation and at least one course consisting of loops knitted by the knitting yarn having a small elongation are alternately knitted,
The synthetic resin laminate, wherein the loop knitted by the knitting yarn having a large elongation is a kind of interlock knitted fabric knitted with a loop length longer than the loop knitted by the knitting yarn having a small elongation. body.   The large knitting yarn for knitting the interlock knitted fabric is selected from one of long fibers, a stretchy bulky yarn, and a plastic elastomer long fiber yarn, and the low knitting yarn is fully drawn. The yarn (FDY), a spin draw type drawn yarn (SDY), an air processed yarn (ATY), a drawn deformed yarn (DTY), or a highly oriented yarn (HOY) is selected. The synthetic resin laminate described.   In the knitted fabric, the ratio Lb / La of the loop length Lb knitted by the knitting yarn B and the loop length La knitted by the knitting yarn A in the product after knitting is 1.05 to 2.5. The synthetic resin laminate according to claim 1 or 2, wherein:   The synthetic resin laminate according to claim 1, 2, or 3, wherein an adhesive layer is provided between the synthetic resin layer and the base fabric.   The synthetic resin laminate according to claim 1, 2, 3, or 4, wherein the synthetic resin layer comprises a skin layer and a foam layer. In a knitted fabric used as a base fabric of a synthetic resin laminate, the knitted fabric is a knitted fabric composed of an interlock knitted fabric knitted from a knitting yarn having a large elongation and a knitting yarn having a small elongation. Knitting yarns with large elongation and knitting yarns with small elongation
And at least one course consisting of loops knitted by the knitting yarn having a large elongation and at least one course consisting of loops knitted by the knitting yarn having a small elongation are alternately knitted,
A knitted fabric characterized by being a kind of interlock knitted fabric in which a loop knitted by a knitting yarn having a large elongation is knitted with a loop length longer than a loop knitted by a knitting yarn having a small elongation.   The large knitting yarn for knitting the interlock knitted fabric is selected from one of long fibers, a stretchy bulky yarn, and a plastic elastomer long fiber yarn, and the low knitting yarn is fully drawn. The yarn (FDY), a spin draw type drawn yarn (SDY), an air processed yarn (ATY), a drawn deformed yarn (DTY), or a highly oriented yarn (HOY) is selected. The knitted fabric. In the knitted fabric, the ratio Lb / La of the loop length Lb knitted by the knitting yarn B and the loop length La knitted by the knitting yarn A in the product after knitting is 1.05 to 2.5. The knitted fabric according to claim 6 or 7, wherein

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