CN117015636A - Knitting method of knitted fabric base material and knitted fabric base material - Google Patents
Knitting method of knitted fabric base material and knitted fabric base material Download PDFInfo
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- CN117015636A CN117015636A CN202280018418.8A CN202280018418A CN117015636A CN 117015636 A CN117015636 A CN 117015636A CN 202280018418 A CN202280018418 A CN 202280018418A CN 117015636 A CN117015636 A CN 117015636A
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- knitting
- base material
- yarn
- yarns
- knitted fabric
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- 238000009940 knitting Methods 0.000 title claims abstract description 192
- 239000000463 material Substances 0.000 title claims abstract description 137
- 239000004744 fabric Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000014509 gene expression Effects 0.000 claims abstract description 24
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims description 39
- 229920005989 resin Polymers 0.000 claims description 39
- 239000002759 woven fabric Substances 0.000 claims description 22
- 239000000049 pigment Substances 0.000 claims description 11
- 238000009954 braiding Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 7
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 description 4
- 238000009963 fulling Methods 0.000 description 3
- 229910001111 Fine metal Inorganic materials 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/10—Patterned fabrics or articles
- D04B1/12—Patterned fabrics or articles characterised by thread material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/047—Reinforcing macromolecular compounds with loose or coherent fibrous material with mixed fibrous material
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2403/00—Details of fabric structure established in the fabric forming process
- D10B2403/02—Cross-sectional features
- D10B2403/024—Fabric incorporating additional compounds
- D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
- D10B2403/02412—Fabric incorporating additional compounds enhancing mechanical properties including several arrays of unbent yarn, e.g. multiaxial fabrics
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/02—Reinforcing materials; Prepregs
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Knitting Of Fabric (AREA)
Abstract
The invention provides a knitting method of a knitted fabric base material, which is characterized in that a pattern is expressed by using fixed yarns in the knitted fabric base material with patterns, so that the orientation of warp yarns and weft yarns is not influenced, and uneven strength can be prevented. A knitting method of a knitted fabric base material (1) comprising a base material (2) and knitting yarns (3), wherein the base material is provided with a plurality of layers in such a manner that warp yarns (first base yarns (10)) and weft yarns (second base yarns (20)) composed of reinforcing fiber yarns cross each other, the knitting yarns fix the base material (2) of the plurality of layers by knitting, and pattern expression is performed on the surface of the knitted fabric base material (1) using the knitting yarns (3) when the knitted fabric is formed.
Description
Technical Field
The present invention relates to a knitting method of a knitted fabric base material and a technique of the knitted fabric base material.
Background
Conventionally, a knitting method of a knitted fabric base material and a technique of a knitted fabric base material are known. For example, as described in patent document 1.
Patent document 1 discloses a braid base material that can be used for fiber reinforced plastic. Specifically, patent document 1 discloses a woven fabric base material including a base material provided with a plurality of warp yarns and weft yarns arranged in a predetermined direction, and a fixing yarn for fixing the plurality of layers of base material by a woven fabric.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2000-501792
Disclosure of Invention
Problems to be solved by the invention
In the woven fabric base material described in patent document 1, the pattern can be implemented by locally changing the weaving method of the warp yarn and the weft yarn. However, when the knitting method of the warp yarn and the weft yarn is locally changed, there is a possibility that uneven strength may occur in the fiber reinforced plastic formed by using the knitted fabric base material due to local change of the knitting method.
The present invention has been made in view of the above-described circumstances. The invention aims to provide a knitting method of a knitted fabric base material with patterns and a knitted fabric base material, which can prevent uneven strength.
Means for solving the problems
The problems to be solved by the present invention are as described above, and means for solving the problems will be described below.
That is, the knitting method of the knitted fabric base material according to the present invention is a knitting method of a knitted fabric base material including a base material in which a plurality of layers are provided so that warp yarns and weft yarns made of reinforcing fiber yarns intersect with each other, and a fixing yarn for fixing the plurality of layers of base material by a knitted fabric, wherein the pattern is expressed on the surface of the knitted fabric base material using the fixing yarn when the knitted fabric is formed.
With this configuration, since the pattern is expressed by the fixed yarn in the woven fabric base material having the pattern, the warp and weft orientations are not affected, and the occurrence of uneven strength can be prevented.
The pattern expression may be performed by using at least one of tuck, applique, and jacquard.
With this configuration, it is possible to perform pattern expression using tuck, applique, or jacquard.
In addition, at least two kinds of knitting yarns may be used as the fixing yarn, and at least one of the knitting yarns may function so as to make the other knitting yarns noticeable.
With this configuration, other knitting yarns can be emphasized, and various patterns can be expressed.
The at least one type of knitting yarn may be transparent or translucent, or may have at least a characteristic of being transparent or translucent when the resin is impregnated into the knitted fabric base material.
With this configuration, at least one of the fixing yarns is made inconspicuous with respect to the other knitting yarn, so that the other knitting yarn can be emphasized, and various patterns can be expressed.
In addition, the at least one knitting yarn may be a wire material having a smaller diameter than the other knitting yarns.
With this configuration, at least one of the fixing yarns is made inconspicuous with respect to the other knitting yarn, so that the other knitting yarn can be emphasized, and various patterns can be expressed.
The at least one knitting yarn and the reinforcing fiber yarn may be the same color system.
With this configuration, at least one of the fixing yarns is made inconspicuous with respect to the other knitting yarn, so that the other knitting yarn can be emphasized, and various patterns can be expressed.
Further, at least two kinds of knitting yarns may be used as the fixing yarn, and a colored knitting yarn in which a dye is transferred to a resin when the resin is impregnated into the knitted fabric base material may be used as at least one of the knitting yarns.
With this configuration, when the resin is impregnated into the woven fabric base material, the dye is transferred to the surrounding portion of the woven yarn, and the dye can be used for pattern expression in addition to pattern expression using the fixing yarn. In this way, various patterns can be expressed.
In the method of knitting the knitted fabric base material, colored yarns may be provided between the plurality of reinforcing fiber yarns arranged in parallel or in alignment with the reinforcing fiber yarns, the colored yarns being used to transfer a dye to the resin when the resin is impregnated into the knitted fabric base material.
With such a configuration, when the resin is impregnated into the woven fabric base material, the dye can be transferred to the resin without depending on the pattern expression (shape) or arrangement of the fixing yarn (that is, the fixing yarn), and the pattern expression can be performed using the dye in addition to the pattern expression using the fixing yarn. In this way, various patterns can be expressed.
The braid base material of the present invention is formed by a braiding method of the braid base material.
With this configuration, the pattern can be formed by performing the pattern expression using the fixing yarn without locally changing the knitting method of the reinforcing fiber yarn, and the occurrence of uneven strength can be prevented.
Effects of the invention
The effects of the present invention are as follows: since the pattern is expressed by the fixed yarns in the woven fabric base material having the pattern, the warp and weft orientations are not affected, and the occurrence of uneven strength can be prevented.
Drawings
Fig. 1 is a front view showing an example of a woven fabric base material according to the first embodiment.
Fig. 2 is an enlarged view of a portion P1 of fig. 1.
Fig. 3 is a front view schematically showing a first region of the braid base material.
Fig. 4 is a front view schematically showing a second region of the braid base material.
Fig. 5 is a plan view schematically showing a braid base material.
Fig. 6 is an enlarged view of the P2 portion of fig. 4.
Fig. 7 is a front view schematically showing the braid base material of the second embodiment, the third embodiment and the fourth embodiment.
Fig. 8 is a front view schematically showing a braid base material (and an FRP using the braid base material) of the fifth embodiment.
Fig. 9 is a front view schematically showing a braid base material (and an FRP using the braid base material) of the sixth embodiment.
Fig. 10 is a front view schematically showing a braid base material (and an FRP using the braid base material) of the seventh embodiment.
Fig. 11 (a) is a front view schematically showing an example of the pattern expression using an applique. (b) Is a front view schematically showing another example of pattern expression using an applique.
Detailed Description
Hereinafter, directions indicated by arrows U, D, L, R, F, and B shown in the drawings are defined as an upper direction, a lower direction, a left direction, a right direction, a front direction, and a rear direction, respectively, for explanation.
First, the structure of the knitted fabric base material 1 according to the first embodiment of the present invention will be described.
The woven fabric base material 1 shown in fig. 1 to 6 is a base material formed by weaving fibers (woven yarns 3 described later). The woven fabric base material 1 of the present embodiment is assumed to be used as a base material of fiber reinforced plastic (FRP: fiber Reinforced Plastic).
Fig. 1 and 2 are photographs showing an example of the knitted fabric base material 1, and fig. 2 is an enlarged view of a portion P1 in fig. 1. In addition, other figures schematically show the braid base material 1. Specifically, fig. 3 and 4 schematically illustrate the first region R1 and the second region R2 illustrated in fig. 1 and 2. Fig. 5 is a plan view schematically showing the braid base material 1. Fig. 6 is an enlarged view of the portion P2 of fig. 4.
The woven fabric base material 1 mainly includes a base material 2 and woven yarns 3.
The base material 2 shown in fig. 1 to 5 is formed by appropriately arranging reinforcing fiber yarns. The base material 2 mainly includes a first base yarn 10 and a second base yarn 20.
As the first base yarn 10 and the second base yarn 20, reinforcing fibers (for example, carbon fibers) are used. Specifically, the first base yarn 10 and the second base yarn 20 are formed by twisting bundled carbon fibers by an appropriate twisting method. The first base yarn 10 and the second base yarn 20 are not necessarily formed by twisting fibers, and for example, bundled reinforcing fibers may be directly used as the first base yarn 10 and the second base yarn 20.
The first base yarn 10 is a warp yarn arranged so as to extend in the up-down direction. The first base yarn 10 is arranged in plural in the left-right direction. The first base yarns 10 are arranged at predetermined intervals from each other.
The second base yarn 20 is a weft yarn disposed so as to extend in the left-right direction. Specifically, the second base yarn 20 is arranged such that a single yarn extends in the left-right direction, and is folded back to the left-right opposite side at a proper position and extends to the next course (in a meandering manner). Thus, the second base yarn 20 is arranged in a plurality of vertically aligned straight portions extending in the left-right direction. The second base yarn 20 is arranged such that straight portions extending in the left-right direction intersect with the first base yarn 10 at a substantially right angle.
As shown in fig. 5, the first base yarn 10 and the second base yarn 20 are provided with a plurality of layers in the front-rear direction. Specifically, a layer composed of a plurality of first base yarns 10 arranged in the left-right direction and a layer composed of a single second base yarn 20 arranged in a meandering manner are arranged alternately in the front-back direction. At this time, the first base yarn 10 and the second base yarn 20 are arranged so that the front and rear positions thereof are not changed (are not changed into a fabric). Fig. 5 shows an example in which 6 layers of the first base yarn 10 and the second base yarn 20 are stacked in the front-rear direction, as an example. The number of the layers of the substrate 2 is not limited as long as the substrate is formed by at least overlapping the first base yarn 10 and the second base yarn 20 with one layer (two layers in total).
The knitting yarn 3 is a knitting yarn (fixing yarn) for fixing the base material 2 formed of a plurality of layers by a knitted fabric. The knitting yarn 3 is pattern-expressed on the surface of the knitted fabric base material 1 using a plurality of knitting patterns. As the material of the knitting yarn 3, any material such as polyester, nylon, polypropylene, or the like can be selected. As shown in fig. 3 to 5, the knitting yarn 3 is knitted so that a crossing portion 3a extending across between adjacent stitches in the course direction (left-right direction) passes through the rear side of the rearmost first base yarn 10. The knitting yarn 3 is knitted such that the loop portions 3b between the loops continuous in the wale direction (up-down direction) pass through the front side of the second base yarn 20 disposed at the forefront. In this way, the knitting yarn 3 is held by the spanning portion 3a and the stitch portion 3b so as to sandwich the base material 2 formed of a plurality of layers from front to back, whereby the first base yarn 10 and the second base yarn 20 can be fixed.
The knitting yarn 3 according to the present embodiment is formed into a knitted fabric by using a plurality of knitting patterns, and a predetermined pattern is expressed on the surface of the knitted fabric base material 1. In fig. 1, a woven fabric base material 1 showing a pattern of a character "G" based on a difference in appearance of a woven structure of a woven yarn 3 is illustrated. In fig. 1, the outline of the character "G" is drawn with white lines to make the pattern noticeable for easy observation of the pattern. Hereinafter, a region of the braid base material 1 at a portion other than the pattern ("outside of the character of G") will be referred to as a first region R1, and a region of the pattern portion will be referred to as a second region R2.
As shown in fig. 2 and 3, in the first region R1, the knitting yarn 3 is formed into a knitted fabric only from the knitting stitches. On the other hand, as shown in fig. 2 and 4, in the second region R2, the braid is formed locally using the tuck coil. The coil shape of the tuck portion in the second region R2 will be specifically described below.
As shown in fig. 6, when knitting yarn 3 of X1 is tucked, the loop forming loops of X2 adjacent below the tuck loop are fished up to the same height as the loop forming loops of X1. When a new loop of X3 is formed between the loop of X1 and the loop of X2, the loop of X1 pulls in the knitting yarn 3 of X3 backward (on the paper surface back side), and thus the loop of X3 becomes smaller. By this influence, the new X4 loop coil formed in the X3 loop coil is pulled down and enlarged.
By using the tuck coil locally in the second region R2 shown in fig. 4 in this way, the knitting structure of the second region R2 becomes a knitting structure having a different appearance from the first region R1 shown in fig. 3 (see fig. 1 and 2). In the present embodiment, as described above, the pattern of the character "G" is expressed by using the knitting structure having the different appearance in the predetermined pattern portion (the second region R2) and the other portion (the first region R1).
As described above, in the present embodiment, by appropriately changing the weave pattern of the knitting yarn 3, it is possible to perform appropriate pattern expression on the knitted fabric base material 1. In this case, it is not necessary to locally weave the first base yarn 10, the second base yarn 20, and the like to locally deform the reinforcing fiber yarn for pattern representation. Therefore, the pattern can be expressed without causing uneven strength.
Next, an example of the knitting method of the knitted fabric base material 1 described above will be described.
The braid base material 1 can be braided using a flat knitting machine. Specifically, the plurality of first base yarns 10 are supplied to the teeth of the flat knitting machine in a state of being aligned in the left-right direction. The second base yarn 20 is inserted into the teeth of the flat knitting machine using a yarn carrier that moves on the front side of the yarn feeding path of the first base yarn 10. In the case of knitting the 6-layer knitted fabric base material 1 shown in fig. 5, a plurality of first base yarns 10 are supplied to the teeth of the flat knitting machine in three rows extending in the left-right direction, and three second base yarns 20 are inserted by using 3 yarn guides passing through the front side of the arrangement of the respective first base yarns 10. Then, knitting yarn 3 is fed to knitting needles of the front needle bed by a yarn carrier disposed on the rear side of the arrangement of the rearmost first base yarn 10, and the knitted fabric is knitted by overlapping the first base yarn 10 and the second base yarn 20. By repeating the above knitting, the knitted fabric base material 1 can be knitted by fixing the first base yarn 10 and the second base yarn 20 using the knitting yarn 3. However, the knitting method of the knitted fabric base material 1 is an example, and the knitting can be performed by any method without being limited to this method.
In the present embodiment, as shown in fig. 3, the second base yarn 20 (weft yarn) is inserted 1 time to form the knitted fabric base material 1 at the time of knitting by the knitting yarn 3 for each of two courses, but the present invention is not limited to this, and the interval at which the second base yarn 20 is inserted may be arbitrarily set. For example, the second base yarn 20 may be inserted every time the knitting by the knitting yarn 3 is performed for one course. As shown in fig. 3, when the second base yarn 20 is inserted 1 time at the time of knitting by the knitting yarn 3 of two courses, another yarn (for example, colored yarn or the like) may be inserted between adjacent second base yarns 20.
The FRP can be formed by impregnating the woven fabric base material 1 with the resin and heating and compressing the resin. As a method of supplying the resin, there are a method of applying the resin to each yarn (the first base yarn 10, the second base yarn 20, or the knitting yarn 3) in advance, and the like, in addition to a method of applying the resin to the knitted fabric base material 1.
Next, the structure of the knitted fabric base material 1 according to the second embodiment of the present invention will be described with reference to fig. 7.
The knitted fabric base material 1 according to the second embodiment is different from the knitted fabric base material 1 according to the first embodiment (see fig. 4, etc.) in that two types of knitting yarns (first knitting yarn 4 and second knitting yarn 5) are used instead of a single type of knitting yarn 3, and one is made transparent knitting yarn. The difference will be described below.
In the second embodiment, the first knitting yarn 4 and the second knitting yarn 5 are alternately used for every 1 course. As the first knitting yarn 4, for example, the same yarn as the knitting yarn 3 of the first embodiment is used. In contrast, as the second knitting yarn 5, a transparent (or translucent) yarn is used. The transparency of the second knitting yarn 5 is not particularly limited, but knitting yarns having at least higher transparency than other fixing yarns (first knitting yarns 4) are used. In fig. 7, the second knitting yarn 5 formed of transparent yarn is indicated by a two-dot chain line.
By setting the second knitting yarn 5 to the knitting yarn having high transparency in this way, the presence of the other first knitting yarn 4 is emphasized (made conspicuous) when the FRP is formed by impregnating the resin, and various pattern expressions can be performed. For example, the visual effect of the first knitting yarn 4 floating in the resin can be obtained.
The second knitting yarn 5 is not limited to a transparent (or translucent) yarn, and for example, a yarn that is transparent (or translucent) when impregnated with a resin may be used. Examples of such yarns include white polyester yarns and nylon yarns. Since these yarns are translucent when impregnated with resin, the presence of the first knitting yarn 4 can be emphasized as in the example of fig. 7.
Next, the structure of the knitted fabric base material 1 according to the third embodiment of the present invention will be described with reference to fig. 7.
The woven fabric base material 1 according to the third embodiment is different from the woven fabric base material 1 according to the second embodiment in that a yarn of the same color system as the first base yarn 10 and the second base yarn 20 is used as the second woven yarn 5 instead of a transparent yarn. The difference will be described below.
In the third embodiment, as the second knitting yarn 5, a yarn of the same color system as the first base yarn 10 and the second base yarn 20 (reinforcing fiber yarn) is used. For example, in the case of using carbon fibers as reinforcing fibers, black (or a similar color system close to black) yarns are used as the second knitting yarns 5. In addition, when aramid fibers are used as the reinforcing fibers, yellow (or a color system close to yellow) yarns are used as the second knitting yarns 5.
The color of the second knitting yarn 5 is preferably the same as (the same color as) the color of the reinforcing fiber, but not necessarily the same color, and a color of the same color system as the reinforcing fiber may be used. For example, as the color of the second knitting yarn 5, a color similar to the color of the reinforcing fiber (a color adjacent to or in the vicinity of the hue circle), a color which is the same in color and differs only in hue (tone), a color which is the same in color of the base, or the like can be used.
By setting the second knitting yarn 5 to be the knitting yarn of the same color system as the reinforcing fiber in this way, the presence of the other first knitting yarn 4 is emphasized (made conspicuous) when the FRP is formed by impregnating the resin, and various pattern expressions can be performed (see fig. 7). For example, the visual effect of the first knitting yarn 4 floating in the resin can be obtained. In order to emphasize the presence of the first knitting yarn 4, the color of the second knitting yarn 5 is preferably set to be at least closer to the color of the reinforcing fiber than the first knitting yarn 4.
Next, the structure of the knitted fabric base material 1 according to the fourth embodiment of the present invention will be described.
The braid base material 1 of the fourth embodiment is different from the braid base material 1 of the second embodiment in that fine metal yarns (wires) are used as the second braid yarns 5 (refer to fig. 7). The difference will be described below.
In the fourth embodiment, a metal yarn (wire) finer than the first knitting yarn 4 is used instead of a transparent yarn as the second knitting yarn 5. The thickness and the raw material of the second knitting yarn 5 are not particularly limited, but at least a yarn finer than the first knitting yarn 4 is used.
By thus making the second knitting yarn 5 a fine metal yarn, the second knitting yarn 5 becomes inconspicuous. As a result, the presence of the other first knitting yarn 4 is emphasized (made conspicuous) relatively as in the second embodiment, and various patterns can be expressed.
The second knitting yarn 5 is not limited to a metal yarn, and may emphasize the presence of the first knitting yarn 4. For example, if a yarn finer than the first knitting yarn 4 is used, the presence of the first knitting yarn 4 can be emphasized, and therefore, in this case, a yarn of the same raw material as the first knitting yarn 4 may be used.
Next, the structure of the knitted fabric base material 1 according to the fifth embodiment of the present invention will be described with reference to fig. 8.
The knitted fabric base material 1 according to the fifth embodiment is different from the knitted fabric base material 1 according to the first embodiment (see fig. 4, etc.) in that two types of knitting yarns (first knitting yarn 4 and second knitting yarn 5) are used instead of a single type of knitting yarn 3, and one yarn contains a dye capable of coloring a resin. The difference will be described below.
Fig. 8 illustrates an FRP100 formed by impregnating a woven fabric base material 1 according to the fifth embodiment with a resin. As the first knitting yarn 4 of the first knitting yarn 4 and the second knitting yarn 5 of the fifth embodiment, colored yarn is used. As the pigment of the first knitting yarn 4, when the resin is impregnated into the knitted fabric base material 1, a dye or pigment transferred to the resin is used. The second braided yarn 5 does not contain pigments transferred to the resin.
By using such a first knitting yarn 4, as shown in fig. 8, when the resin is impregnated into the knitted fabric base material 1, the pigment of the first knitting yarn 4 is transferred to the resin, and the resin around the first knitting yarn 4 is colored. In fig. 8, the colored portion is schematically shown by hatching. As described above, the knitted fabric base material 1 according to the fifth embodiment can perform not only the pattern expression based on the knitting structure of the first knitting yarn 4 and the second knitting yarn 5, but also the pattern expression using the pigment, and can perform various pattern expressions.
The first knitting yarn 4 may be made to contain not only a dye but also the second knitting yarn 5 (same dye or different dye).
Next, the structure of the knitted fabric base material 1 according to the sixth embodiment of the present invention will be described with reference to fig. 9.
The knitted fabric base material 1 according to the sixth embodiment is different from the knitted fabric base material 1 according to the first embodiment (see fig. 4, etc.) in that colored yarns 6 are arranged between the second base yarns 20 arranged in parallel in the upper and lower directions. The difference will be described below.
The colored yarn 6 is disposed between the second base yarns 20 so as to be substantially parallel to the second base yarns 20. For example, the colored yarn 6 can be disposed in a portion of the second base yarn 20 of the knitted fabric base material 1 according to the first embodiment by pulling apart the portion. The colored yarn 6 is colored using a dye or pigment that is transferred to the resin when the resin is impregnated into the knitted fabric base material 1, as in the first knitted yarn 4 (see fig. 8) of the fifth embodiment.
By using such a colored yarn 6, as shown in fig. 9, when the resin is impregnated into the woven fabric base material 1, the pigment of the colored yarn 6 is transferred to the resin, and the resin around the colored yarn 6 is colored. As described above, the knitted fabric base material 1 according to the sixth embodiment can perform not only the pattern expression based on the knitting structure of the first knitting yarn 4 and the second knitting yarn 5, but also the pattern expression using the pigment, and can perform various pattern expressions. For example, in the example shown in fig. 9, in addition to the pattern representation by the weave structure, the pattern representation such as a stripe by the pigment can be performed. Further, unlike the fifth embodiment, pigment can be transferred to the resin irrespective of the arrangement of the knitting yarn 3, and therefore, various pattern expressions can be performed.
For convenience, fig. 9 shows an example in which one colored yarn 6 is arranged between two parallel second base yarns 20, but the number and arrangement of the colored yarns 6 are not limited to this, and for example, the second base yarns 20 and the colored yarns 6 may be alternately arranged, or the second base yarns 20 and the colored yarns 6 may be arranged in a random order.
Next, the structure of the knitted fabric base material 1 according to the seventh embodiment of the present invention will be described with reference to fig. 10.
The woven fabric base material 1 according to the seventh embodiment is different from the woven fabric base material 1 (see fig. 9) according to the sixth embodiment in that the colored yarn 6 is aligned with the second base yarn 20 without disposing the colored yarn 6 between the second base yarns 20. By aligning the colored yarn 6 with the second base yarn 20 in this way, the resin around the colored yarn 6 (second base yarn 20) can be colored, and various patterns can be expressed.
The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments, and can be appropriately modified within the scope of the technical idea of the invention described in the claims.
For example, in the above embodiment, an example in which carbon fibers are used as the reinforcing fibers has been shown, but the present invention is not limited to this, and other various reinforcing fibers (for example, glass fibers, aramid fibers, etc.) may be used.
In the second, third (see fig. 7) and fourth (see fig. 8) embodiments, two types of knitting yarns are used as the fixing yarns, but the present invention is not limited to this, and three or more types of knitting yarns may be used, for example.
In the sixth embodiment (see fig. 9) and the seventh embodiment (see fig. 10), the colored yarn 6 is arranged parallel to the second base yarn 20, but the present invention is not limited to this, and may be arranged in any direction. For example, the first base yarn 10 may be arranged in parallel (between the first base yarns 10 or aligned with the first base yarns 10).
In the above embodiment, the tuck stitch is used in the second region R2, so that the knitting structure of the second region R2 is different from that of the first region R1, but the present invention is not limited to this. That is, other knitting methods (intarsia, jacquard, etc.) may be used instead of tuck. The weave pattern in the present invention preferably comprises at least one of tuck, applique, and jacquard.
A specific example of the pattern expression using an applique will be described below with reference to fig. 11.
Fig. 11 is a schematic view showing a braid base material 1 in which an intarsia pattern is formed using a plurality of braid yarns (anchor yarns) having different colors from each other. Symbol a (open circle symbol) in the figure indicates, for example, a loop of yellow knitting yarn appearing on the surface of the substrate. Note that symbol B (hatched circle symbol) in the figure indicates, for example, a loop of red knitting yarn appearing on the surface of the substrate. Note that symbol C (black circle symbol) in the figure indicates, for example, a loop of black knitting yarn appearing on the surface of the substrate. Note that a symbol T (inverted V-shaped symbol) in the figure indicates a portion where two knitting yarns are tucked and connected.
Fig. 11 (a) shows an example of a knitted fabric substrate 1 having an inlaid pattern with colors distinguished from each other by using 2 kinds of knitting yarns of yellow and red. The 2 knitting yarns are connected to each other by tuck-stitch at the boundary portion. The specific knitting method of the applique, the method of connecting the knitting yarns, and the like are not limited to the illustration, and any known method may be employed.
In the example shown in fig. 11 a, the size of the stitch becomes smaller in the boundary portion (the portion denoted by symbol T) of the 2 kinds of knitting yarns, and therefore the appearance of the stitch is different in the boundary portion and the other portions. This makes it possible to make the boundary portion of the knitting yarn noticeable.
In the knitted fabric base material 1 of fig. 11 (a), since the stitch bonding is not performed on 2 kinds of knitting yarns, the size of the stitches at the boundary portion is equal to (uniform with) the size of the stitches at the other portion, and therefore the boundary portion can be given a neat appearance. However, in this case, since the 2 kinds of knitting yarns are not connected to each other, in the case of forming the FRP using this knitted fabric base material 1, there is a possibility that cracks at the boundary portion are easily generated.
On the other hand, fig. 11 (b) shows an example of a knitted fabric base material 1 in which an inlaid pattern is formed using a black knitting yarn in addition to yellow and red knitting yarns. Specifically, in the knitted fabric base material 1 of fig. 11 (b), black knitting yarn is knitted between courses knitted with yellow and red knitting yarn. In the illustrated example, the second base yarn 20 is inserted 1 time every 2 courses, and the black knitting yarn is arranged at the insertion position of the second base yarn 20.
In the example shown in fig. 11 (b), a pattern in which red and yellow coils are arranged in a dot shape as a whole can be obtained. In addition, in the example shown in fig. 11 (b), unlike the example shown in fig. 11 (a), the red and yellow knitting yarns are not tucked to each other at the boundary portion. However, in the example of fig. 11 (b), unlike the example of fig. 11 (a), the black knitting yarn continues over the entire knitting width. Therefore, even when the FRP is formed using the braid base material 1, cracks are less likely to occur at the boundary portion of the red and yellow braid. In addition, since the tuck-stitch connection is not performed on the red and yellow knitting yarns, the size of the stitch can be made uniform.
In the example shown in fig. 11 (b), the boundary portion can be made conspicuous by tuck-joining the red and yellow knitting yarns.
In fig. 11, an example in which an applique is used as a weave structure is illustrated, but in addition to this, jacquard weave can be used. In the case of jacquard, knitting yarn is fed from two yarn guides, and knitting yarn is knitted by knitting only one yarn and floating the other yarn. Here, in a section where only one of the 2 knitting yarns (fixed yarns) is continuously looped, the other knitting yarn continuously becomes a float. When the knitting yarn is not connected to the knitted fabric base material 1 over a long distance on the back surface of the knitted fabric base material 1, a knitting failure may occur. Therefore, in view of ease of knitting, the yarn on the side where the float is performed can be connected to the other tuck at a predetermined interval. Further, by performing tucking in this manner, the size of the stitches on the surface of the knitted fabric base material 1 changes, and therefore, pattern expression can be performed by using the tucking. Further, the knitting yarn to be turned into a loop is switched at predetermined intervals, so that a striped pattern and a lattice pattern can be formed. In this case, even if the tucking is not performed, the length of the portion where the float is performed can be suppressed.
Industrial applicability
The present invention can be applied to a knitting method of a knitted fabric base material and a knitted fabric base material.
Description of the reference numerals
1. Woven fabric base material
2. Substrate material
3. Knitting yarn
4. First knitting yarn
5. Second knitting yarn
6. Colored yarn
10. First base yarn
20. Second base yarn
100 FRP
Claims (9)
1. A method for knitting a knitted fabric base material comprising a base material and a fixing yarn, wherein the base material is provided with a plurality of layers in such a manner that warp yarns and weft yarns made of reinforcing fiber yarns intersect each other, the fixing yarn fixes the plurality of layers of base material by the knitted fabric,
in forming the knitted fabric, the fixing yarn is used to perform pattern expression on the surface of the knitted fabric base material.
2. The method for knitting a braid base material according to claim 1, wherein,
the pattern representation uses at least one of tuck, applique and jacquard.
3. The method for knitting a braid base material according to claim 1 or 2, wherein,
the fixing yarn uses at least two kinds of knitting yarns,
at least one of the knitting yarns functions to make the other knitting yarns noticeable.
4. The method for knitting a braid base material according to claim 3, wherein,
the at least one knitting yarn is transparent or translucent, or at least has a characteristic of being transparent or translucent when the resin is impregnated into the knitting base material.
5. The method for knitting a braid base material according to claim 3 or 4, wherein,
the at least one knitting yarn uses a wire material having a diameter finer than that of the other knitting yarns.
6. The method for knitting a braid base material according to any one of claims 3 to 5, wherein,
the at least one woven yarn and the reinforcing fiber yarn are of the same color system.
7. The method for knitting a braid base material according to any one of claims 1 to 6, wherein,
the fixing yarn uses at least two kinds of knitting yarns,
at least one of the knitting yarns uses a colored knitting yarn in which a dye is transferred to a resin when the resin is impregnated into the knitted fabric base material.
8. The method for knitting a braid base material according to any one of claims 1 to 7, wherein,
colored yarns are provided between the plurality of reinforcing fiber yarns arranged in parallel or in alignment with the reinforcing fiber yarns, the colored yarns being capable of transferring a pigment to a resin when the resin is impregnated into the woven fabric base material.
9. A base material of a woven fabric, wherein,
the braid base material is formed by the braiding method of the braid base material of any one of claims 1 to 8.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021033111 | 2021-03-03 | ||
| JP2021-033111 | 2021-03-03 | ||
| PCT/JP2022/008161 WO2022186106A1 (en) | 2021-03-03 | 2022-02-28 | Knitting method for knitting base material, and knitting base material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117015636A true CN117015636A (en) | 2023-11-07 |
Family
ID=83154436
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280018418.8A Pending CN117015636A (en) | 2021-03-03 | 2022-02-28 | Knitting method of knitted fabric base material and knitted fabric base material |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2022186106A1 (en) |
| CN (1) | CN117015636A (en) |
| DE (1) | DE112022001362T5 (en) |
| WO (1) | WO2022186106A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5617246A (en) * | 1979-07-17 | 1981-02-19 | Garufu Suteitsu Paper Corp | Reinforcing knitted article and laminate manufactured by said article |
| JPH01229852A (en) * | 1988-03-02 | 1989-09-13 | Toray Ind Inc | Reinforcing base for composite material |
| DE4419985C2 (en) | 1994-06-08 | 1996-04-04 | Univ Dresden Tech | Multi-layer knitted fabric and process for its manufacture |
| JP6071313B2 (en) * | 2012-08-07 | 2017-02-01 | 株式会社島精機製作所 | Knitted base material and knitting method of knitted base material |
| JP7048956B2 (en) * | 2017-09-04 | 2022-04-06 | 地方独立行政法人東京都立産業技術研究センター | FRP molded product and its manufacturing method |
-
2022
- 2022-02-28 DE DE112022001362.1T patent/DE112022001362T5/en active Pending
- 2022-02-28 CN CN202280018418.8A patent/CN117015636A/en active Pending
- 2022-02-28 JP JP2023503799A patent/JPWO2022186106A1/ja active Pending
- 2022-02-28 WO PCT/JP2022/008161 patent/WO2022186106A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| DE112022001362T5 (en) | 2024-02-15 |
| WO2022186106A1 (en) | 2022-09-09 |
| JPWO2022186106A1 (en) | 2022-09-09 |
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