JP2001164445A - Soft porous core material, formed body and method for producing the formed body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively obtain a resin honeycomb formed body provided with elasticity n the thickness direction and to obtain a core material to be used for the resin honeycomb formed body. SOLUTION: This soft porous core material 1 for the resin honeycomb formed body comprises a double raschel three-dimensional knitted fabric 1 in which connecting yarns 4 for setting thickness are perpendicularly laid between a surface texture 2 and a back texture 3, the surface and the back textures are integrally connected to form a double knitting texture, the surface and the back textures are each constituted of finely knitting parts 5 and thickly knitting parts 6 formed by connection of the right and left finely knitting parts 5, the thickly knitting parts 6 are intermittently arranged in series, the adjoining thickly knitting parts 6 are differed in phase by 1 pitch in the longitudinal direction, the thinly knitting parts 5 are made by dividing the thickly knitting parts into two right and left parts, the right and left thinly knitting parts 5 are bonded to form stitches 9 by the succession of formation of the adjoining thickly knitting parts 6, the surface and the back textures are constituted of a fiber bundle yarn, the connecting yarns 4 mainly comprise the synthetic fiber single yarns and are selectively mixed with a mineral fiber bundled yarn and a three-dimensional shape is formed by heat setting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft porous core material for a resin honeycomb formed body, a formed body and a method of manufacturing the same, and more particularly to a resin honeycomb formed body having elasticity in a thickness direction and a soft porous core used for the same. .

[0002]

2. Description of the Related Art Conventionally, for example, a honeycomb structure is formed by laminating thin plates or laminating corrugated plates.

[0003]

Therefore, there is a problem that there are many manufacturing steps. In addition, flat ones can be easily made, but parts with different wall thickness, curved ones,
Or the box was extremely difficult. Furthermore, there was no resin honeycomb molded body having elasticity in the thickness direction. The present invention relates to a resin honeycomb molded body capable of easily obtaining a resin honeycomb molded body having a partially different thickness, a curved object, a box-shaped object, and an elasticity in a thickness direction. It has been developed for the purpose of providing a manufacturing method and a soft porous core material used for the same.

[0004]

The present invention has the following technical means in order to solve the above problems and achieve the object. The term “fiber bundle yarn” as used herein refers to a yarn in which a bundle of fibers is twisted (single twist yarn, single twist yarn, ply twist yarn).
The single yarn refers to a single linear yarn. Impregnation refers to either being included between a large number of fine fibers or adhering to a single yarn or cloth. The intervening cloth layer refers to a cloth-like (woven cloth, knitted cloth, net, non-woven fabric, mineral fiber mat, resin preformed body) that can impregnate the compounded resin. The compounded resin refers to a soft starch syrup-like resin obtained by compounding and kneading materials necessary for forming a molded article.

[0005] (1) Double Russell solid knitted fabric,
A binding yarn that sets the thickness between the front and back textures intersects orthogonally and ties the front and back textures together to form a double knitted texture. , The left and right thin knitted parts are joined together, the thick knitted parts are intermittently connected in series, and the adjacent thick knitted parts are shifted by one pitch phase in the vertical direction, The thick stitch is formed by bifurcating the left and right, the left and right thin stitches are combined to form an adjacent thick stitch to form a stitch, and the front and back texture is formed of a fiber bundle yarn. A soft porous core material for a resin honeycomb molded body in which a three-dimensional shape is fixed by heat setting, in which a synthetic fiber single yarn is mainly used and a mineral fiber bundle yarn is selectively used as a binding yarn.

(2) The soft and porous core material for a resin honeycomb molded body, wherein the front and back textures are composed of one selected from the group consisting of synthetic fibers, mineral fibers, and single or mixed fiber bundle yarns.

(3) The soft porous core material for a resin honeycomb molded body according to any one of (1) and (2), wherein the synthetic fiber is a polymer synthetic fiber such as polyester.

(4) The resin honeycomb molding according to any one of (1) to (3), wherein the mineral fiber is one selected from a simple substance and a composite of carbon fiber, glass fiber, and Kepler fiber. Soft porous core material for body.

(5) The mixing of the synthetic fiber and the mineral fiber in the binding yarn is one selected from ply twisting, aligning, or alternating arrangement of the rigid fiber and the mineral fiber. A soft porous core material for a resin honeycomb molded body according to any one of the above.

(6) The mixture of synthetic fibers and mineral fibers in the binding yarn is arranged alternately along the longitudinal direction of the thick knit portion and the thin knit portion (1) to (4). 4. A soft porous core material for a resin honeycomb molded body according to the above item 1.

(7) The resin honeycomb molded body according to any one of (1) to (4), wherein the mixing ratio of the mineral fiber to the synthetic fiber in the binding yarn is 20% by volume to 50% by volume. Soft porous core material.

(8) Double Russell solid knitted fabric,
A binding yarn that sets the thickness between the front and back textures intersects orthogonally and ties the front and back textures together to form a double knitted texture. , The left and right thin knitted parts are joined together, the thick knitted parts are intermittently connected in series, and the adjacent thick knitted parts are shifted by one pitch phase in the vertical direction, The thick stitch is formed by bifurcating the left and right, the left and right thin stitches are combined to form an adjacent thick stitch to form a stitch, and the front and back texture is formed of a fiber bundle yarn. The binding yarn is mainly a synthetic fiber single yarn, mineral fiber bundle yarn is selectively mixed, and a soft porous core material whose solid shape is fixed by heat setting is impregnated with soft syrup-like compound resin and cured. And a resin honeycomb formed body having elasticity in a thickness direction of the formed body by elasticity of a binding yarn.

(9) The molded body is formed by male and female molding,
(8) The resin honeycomb molded body according to (8), wherein the thickness is partially changed to be thin.

(10) In the molded body, a surface layer formed in advance is integrally joined to a molding surface of a molding die (8).
The resin honeycomb formed article according to any one of (9).

(11) A soft porous core material made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to the surface structure and the back structure,
Between each of the plurality of pieces, an interposed cloth impregnated with the compounded resin is sandwiched and integrally joined to form a double honeycomb, and an interposed cloth layer impregnated with the compounded resin is formed on the front and back surfaces of the double honeycomb, respectively. A resin honeycomb molded body which is formed by stacking and integrally forming and having elasticity in the thickness direction of the molded body by elasticity of a binding yarn.

(12) A soft porous core material made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to the front and back structures,
Between each of the plurality of pieces, a double honeycomb is formed integrally by sandwiching the preformed molded body, and the preformed molded bodies are laminated and integrally formed on the front and back surfaces of the double honeycomb, respectively. And a resin honeycomb molded body having elasticity in a thickness direction by elasticity of a binding yarn.

(13) An intervening cloth layer impregnated with a compound resin is interposed between each of a plurality of soft porous core members made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to each other between a front structure and a back structure. By combining the step of forming a double honeycomb by sandwiching and forming integrally, and the step of integrally forming the interposed cloth layers impregnating the compounded resin on the front and back surfaces of the double honeycomb with a molding die, A method for producing a resin honeycomb molded body having elasticity in a thickness direction of a molded body by elasticity of a binding yarn of a soft porous core material.

[0018]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a soft porous core material (hereinafter, simply referred to as a soft porous core material) for a resin honeycomb formed body made of a double Russell three-dimensional knitted fabric, and FIG. 2 is a plan view.

The soft porous core material (1) is made of a double raschel three-dimensional knitted fabric. The material is selected from synthetic fibers such as polyester fiber and vinylon fiber, and mineral fibers such as carbon fiber, Kepler fiber and glass fiber.

The double Russell three-dimensional knitted fabric (1) is a double-faced double-sided knitted fabric by a Russell knitting machine, and has a turtle pattern printed thereon. In FIG. 1, a plurality of orthogonal binding yarns (4) are interposed between a front structure (2) and a back structure (3) to have a predetermined thickness, for example, an arbitrary thickness such as 2 mm to 20 mm. It is formed in three dimensions.

In terms of organization, as shown in the left part of FIG. 2, a large number of thin knitted portions (5) are joined adjacently at their longitudinal ends to form a thick knitted portion (6). A coarse portion (7) is formed between the left and right thick knit portions (6), and a sewing thread (8) that comes and goes zigzag between the left and right thick knit portions (6) is knitted at the coarse portion (7). ing.

After the knitting is completed, the suture (8) is cut off and stretched in the left-right direction in FIG. 2, and as shown in the right part of FIG. 2, the front and back tissues (2) and (3) are The thin knitted portion (5) is composed of a thick knitted portion (6) to which the left and right thin knitted portions (5) are joined, and the thick knitted portion (6) is intermittently connected in series, and an adjacent thick knitted portion. (6) In the vertical direction, the phase is shifted by one pitch,
(5) is formed by a thick knit portion (6) bifurcated to the left and right, and the left and right thin knit portions (5) are combined to form an adjacent thick knit portion (6). Many (9) are formed. By heat setting this, the shape of the stitch (9) of the tortoiseshell pattern can be fixed.

The yarns used for the front and back textures (2) and (3) are flexible, for example, when used alone or as a mixture of synthetic fiber bundle yarn and mineral fiber bundle yarn, and can easily impregnate the compounded resin. . If a single yarn of synthetic fiber is used as the binding yarn (4), the binding yarn (4) has elasticity, so that elasticity in the front and back directions is generated.

However, in order to impregnate the compounded resin moderately, a fiber bundle yarn such as a single-twisted yarn, a single-twisted yarn, a ply-twisted yarn, and a tying yarn (pulling yarn) of a bundle of fine fibers is preferable. In addition, it is possible to combine the fiber bundle yarn and the thick single yarn, or to make them aligned.
The arrangement of the binding yarns (4) is, for example, 0.
An arbitrary interval such as 2 mm to 1 mm can be set, or a dense portion can be formed intermittently.

FIG. 3 is a side view of the thick knit portion (6). Since the organization can be set arbitrarily, a schematic diagram is shown. In the figure, the binding yarn (4) is composed of a single yarn (4a) of synthetic fiber and a ply-twisted yarn of mineral fiber bundle yarn (4b). Polyester fiber was selected as the synthetic fiber, and carbon fiber was selected as the mineral fiber.

The binding yarn (4) has an upper end formed into a surface structure (2), and is formed by passing down several yarns and descending into a back structure (3) to form a front and back structure (3). 2) (3) is integrally connected.
This varies depending on the organization.

FIG. 4 is a schematic view showing a second embodiment of the binding yarn (4). The binding yarn (4) is a combination of a synthetic fiber single yarn (4a) and a mineral fiber bundle yarn (4b). If necessary, a not-shown entanglement thread can be entangled.

FIG. 5 is a schematic view showing a third embodiment of the binding yarn (4). The binding yarn (4) shows an aspect in which the synthetic fiber single yarn (4a) and the mineral fiber bundle yarn (4b) are alternately knitted between the front and back textures (2) and (3).

FIG. 6 is a schematic view showing a fourth embodiment of the binding yarn (4). The binding yarn (4) is composed of a plurality of yarn rows of the synthetic fiber single yarn (4a) and the mineral fiber bundle yarn between the front and back structures (2) and (3).
(4b) shows an embodiment in which a plurality of yarn rows are alternately arranged and knitted integrally.

In each of the above embodiments, the mixing ratio of the mineral fiber bundle yarn (4b) to the synthetic fiber single yarn (4a) in the binding yarn (4) is arbitrarily set in the range of 20% by volume to 50% by volume. You.

FIG. 7 is a plan view showing a state in which the stitch (9) of the soft porous core material (1) is partially moved. The double Russell three-dimensional knitted fabric can deform the stitch (9) in a free direction.
In addition, since the binding yarn (4) is elastic,
(2) It has rigidity so that it does not collapse even if it is pressed by hand from above.

Next, a method for producing the resin honeycomb molded body (1) will be described. A soft syrup-like compounded resin is impregnated on a soft porous core material (1) made of a double-Russell three-dimensional knitted fabric shown in FIG. The impregnation method is arbitrary such as dipping, coating, spraying and the like. As the compounded resin, those obtained by mixing various necessary materials used in general FRP molding and those based thereon can be used.

FIG. 8 shows a soft porous core material impregnated with a compounded resin.
(1) shows a state where the mold is placed flat on the mold (10). When synthetic fiber bundle yarns are used for the front and back textures (2) and (3), the compounded resin (11) is impregnated between fine fibers. Also binding yarn (4)
The compound resin (11) is impregnated between adjacent single yarns (4a) even if only a single yarn (4a) of synthetic fiber is used. When the mineral fiber bundle yarn (4b) is added, the compound resin (11) is impregnated between the fine fibers of the fiber bundle yarn (4b). If the mold (10) is curved, it curves accordingly.

The soft porous core material (1) is cured (5 to 20 minutes depending on the material and temperature) in a molding die, and the compounded resin (11) is hardened over time to form a resin honeycomb molded body (12). It is formed. As a result, as shown in FIG. 9, even though the compound resin (11) hardly adheres to the thick single yarn (4a), the compound resin is interposed between the thin mineral fiber bundle yarns (4b).
(11) is impregnated, and a plate-like connection between adjacent binding yarns (4) can also be seen.

That is, in the case of a linear single yarn, regardless of the material, the compounded resin hardly adheres, and even if it adheres, it may peel off. Regarding the fiber bundle yarn, regardless of the material, the compounded resin enters between the fine fibers by capillary action, and the compounded resin is united with the fibers, so that peeling is unlikely to occur. In addition, since the fine fibers are fluffed right and left and front and back, the compound resin is impregnated between adjacent fibers to combine adjacent fibers integrally, for example, densely arranged along the length of the thick knit (6) The adjacent binding yarns (4) can be connected to each other in a plate shape.

As described above, when the thick single yarn (4a) is used as the binding yarn (4) and the mineral fiber bundle yarn (4b) is added thereto, the thick single yarn (4a) Since the compounded resin impregnated in the yarn (4b) adheres and is integrally formed, when the resin honeycomb molded body (12) is pressed in the thickness direction, due to the elasticity of the thick single yarn (4a) of the synthetic fiber, A resin honeycomb molded body (12) having elasticity in the thickness direction can be obtained.

As shown in FIG. 7, the soft porous core material (1)
The width of the stitch (9) can be changed freely, and the thickness can be reduced by applying pressure in the thickness direction. Can be Even in that case, the binding yarn
By setting (4), elasticity can be imparted in the thickness direction (for example, only the corners).

The soft porous core material (1) can be integrally formed as a molded body by laminating a plurality of layers having different modes (material composition and thickness) by impregnating a compounded resin. Further, an intervening cloth layer (woven fabric, knitted fabric, net, nonwoven fabric, glass mat, etc.) (13) impregnated with the compounded resin is interposed between the layers, and can be integrally formed as a molded body by curing.

That is, FIG. 10 is a longitudinal sectional front view of a resin honeycomb molded body (12) in which a plurality of soft porous core members (1) are laminated. The outline of the method of manufacturing the molded body (12) is as follows. First, a compound resin is impregnated into an intervening cloth layer (13) composed of a fiber reinforcing material mat (for example, a glass strand mat) to form a soft porous core material.
(1) sandwiched between each other, the upper and lower soft porous core material (1) is adhered to the upper and lower soft porous core material (1) by the compound resin impregnated in the intervening cloth layer (13) made of )
As a single unit.

According to this method, it is possible to prevent the compounding resin from adhering to the binding yarn (4) portion and to maintain the elasticity of the binding yarn (4). Therefore, the quality, thickness, arrangement density, and the like of the binding yarn (4) are set according to the required elasticity.

Thereafter, an intervening cloth layer made of a fiber reinforcing material mat impregnated with a compounded resin is placed in a molding die (not shown).
(15) are arranged, and the double honeycomb (14) is laid thereon, and an intervening cloth layer (15) made of a fiber reinforced material mat impregnated with the compounded resin is laid thereon, and the mold is clamped and integrated. Molding. In FIG. 10, the binding yarn (4) is curved due to pressurization by a mold, and this shape is heat-set by heat during molding.

As a result, the plurality of soft porous cores (1) are bonded as a double honeycomb (14) by the intervening cloth layer (13), and the surface thereof is formed by curing the intervening cloth layer (15) made of a fiber-reinforced mat. The resin honeycomb molded body (12) having excellent rigidity protected by the body layer (15). In this case, if necessary, a surface layer (for example, for coloring) can be formed on the molding surface of the mold in advance.

In place of the intermediate fabric layer (13) in the middle of the double honeycomb (14) and the intervening fabric layers (15) on the front and back, a preformed molded body is interposed and softened by mold clamping. It can be integrally joined by the compound resin impregnated in the porous core material (1). In this case, a preformed article having good adhesiveness with the compounded resin is selected, and a soft article can also be used. The hardness, wall thickness,
The material can be changed.

Although the front and back surfaces of the resin honeycomb molded body (12) are hard, since the binding yarn (4) is elastic, even when pressed from the outside, the thickness direction of the molded body (12) is increased. Is flexible and absorbs external pressure. For this reason, for example, even if an external impact is applied, it is extremely difficult to break and open the hole because the impact is absorbed.

Further, since the resin honeycomb molded body (1) can be easily molded by male and female molds, for example, when the double honeycomb (14) is used in a car bumper, the impact of a collision can be absorbed. . When used on ships, etc., it can improve buoyancy by itself,
In the event of a marine accident, the impact of the collision is reduced, and even if the outside is damaged, water does not leak into the ship, and the severely broken pieces can be used as floating bodies.

The present invention is not limited to the above embodiment, but can be used in various fields, and can be appropriately changed in design according to the purpose. For example, the double honeycomb
The material can be changed up and down with the intervening cloth layer (13) of (14). The material of the soft porous core material (2) can also be partially changed in the plane direction. The front and back layers (15) of the resin honeycomb formed body (12) can be mixed with a flame-retardant material, a weather-resistant material, a wear-resistant material, and the like.

[0047]

The present invention configured as described above has the following excellent effects.

(1) The soft porous core material for the resin honeycomb molded body is made of a double Russell three-dimensional knitted fabric, and a binding yarn for setting the thickness is interposed orthogonally between the surface structure and the back structure. Since the double knitted structure is formed by connecting the structures together, it has a thick honeycomb structure, and the resin honeycomb molded body can be easily formed simply by impregnating the compounded resin and curing. There is an effect that can be. In addition, since the front and back textures are composed of synthetic fiber bundle yarns, the impregnating property of the compounded resin is excellent, and the binding yarn is made of the compounded resin when the synthetic fiber single yarn and the mineral fiber bundle yarn are mixed. At the same time that the impregnation can be surely performed, there is an effect that a resin honeycomb formed body utilizing the elasticity of the synthetic fiber single yarn and having elasticity in the thickness direction of the formed body can be easily obtained.

(2) When the front and back tissues are composed of one selected from a single fiber of synthetic fibers and mineral fibers or a fiber bundle yarn of a mixed body, the rigidity of the front and back tissues can be arbitrarily determined according to the purpose. There is an effect that can be set.

(3) When the synthetic fiber is a high-molecular synthetic fiber such as polyester, it has excellent bonding properties with the compounded resin, and when a single yarn is used as the binding yarn, it has excellent elasticity. effective.

(4) When the mineral fiber is selected from a simple substance or a composite of carbon fiber, glass fiber and Kepler fiber, it is excellent in adaptability to the compounded resin and has an effect of improving the rigidity of the molded article.

(5) When the mixing of synthetic fibers and mineral fibers in the binding yarn is selected from twisting and drawing, there is an effect that desired elasticity and rigidity can be set according to the purpose.

(6) When the mixture of the synthetic fibers and the mineral fibers in the binding yarn is alternately arranged along the longitudinal direction of the thick knit portion and the thin knit portion, partial elasticity according to the purpose can be obtained.
There is an effect that the rigidity can be set.

(7) When the mixing ratio of the mineral fiber to the synthetic fiber in the binding yarn is 20% by volume to 50% by volume, there is an effect that the rigidity and elasticity can be adjusted and set.

(8) Double Russell solid knitted fabric,
A binding yarn that sets the wall thickness between the front and back textures intersects orthogonally and bonds the front and back textures together to form a double knitted structure.The binding yarn is a synthetic fiber single yarn and mineral Fiber bundle yarn is mixed,
A resin obtained by impregnating a soft syrup-shaped compound resin into a soft porous core material whose three-dimensional shape is fixed by heat setting and curing the resin, thereby providing elasticity in the thickness direction of the molded product due to the elasticity of the binding yarn. The honeycomb formed body has excellent elasticity in the thickness direction,
In particular, there is an effect that elasticity can be provided at the corners.

(9) The molded body is formed by male and female molding,
When the wall thickness is partially changed to be thin, there is an effect that the wall can be formed by changing the wall thickness in accordance with the thickness of the target formed body.

(10) When the molded body is integrally joined with a surface layer formed in advance on the molding surface of a molding die, there is an effect that a honeycomb structure without through holes can be formed.

(11) A soft porous core material made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to the surface structure and the back structure,
In between each of the plurality, a double honeycomb is formed integrally by sandwiching the intervening cloth layer impregnated with the compounded resin,
On the front and back surfaces of the double honeycomb, a molded body formed by integrally laminating the interposed cloth layers impregnated with the compounded resin,
Due to the elasticity of the binding yarn, the molded body has elasticity in the thickness direction, and has an effect that it does not burst even when subjected to an impact.

(12) A soft porous core material made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to the front and back structures,
In between each of the plurality of formed bodies, the formed bodies are integrally connected to form a double honeycomb, and the formed bodies formed by integrally forming the formed bodies on the front and back surfaces of the double honeycomb are joined together. Due to the elasticity of the yarn, the molded body has elasticity in the thickness direction, and has an effect that molding is easy and molding accuracy can be increased.

(13) An intervening cloth layer impregnated with a compounded resin is interposed between a plurality of soft porous core members each made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to the front and back structures. By combining the step of forming a double honeycomb by sandwiching and forming integrally, and the step of integrally forming the interposed cloth layers impregnating the compounded resin on the front and back surfaces of the double honeycomb with a molding die, Due to the elasticity of the binding yarn of the soft porous core material, the method for producing a resin honeycomb molded body having elasticity in the thickness direction of the molded body can be easily performed in a simple process by using a resin honeycomb molded body having elasticity. This has the effect that it can be manufactured with high precision.

(14) As a whole, there is an effect that even a shape having a shape changed quickly and easily can be manufactured at a low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a soft porous core material.

FIG. 2 is a plan view of a soft porous core material.

FIG. 3 is a partial front view of a thick knit portion of a soft porous core material.

FIG. 4 is a front view of a binding yarn showing a second embodiment.

FIG. 5 is a front view of a binding yarn showing a third embodiment.

FIG. 6 is a front view of a binding yarn showing a fourth embodiment.

FIG. 7 is a plan view of a soft porous core material showing a state where a part of a stitch is shifted.

FIG. 8 is a vertical sectional front view of a molding die showing a molding method.

FIG. 9 is a partially longitudinal front view of a resin honeycomb molded body.

FIG. 10 is a longitudinal sectional front view of a resin honeycomb formed body according to a second embodiment.

[Explanation of symbols]

 (1) Double Russell three-dimensional knitted fabric (2) Surface structure (3) Back structure (4) Binder yarn (4a) Synthetic fiber single yarn (4b) Mineral fiber bundle yarn (5) Fine knitting part (6) Thick knitting part (7) Coarse part (8) Sewing thread (9) Stitch (10) Mold (11) Compound resin (12) Resin honeycomb formed body (13) Interposed cloth layer (14) Double honeycomb (15) Interposed cloth layer (formed body layer)

Continued on front page F term (reference) 4F100 AD11A AD11C AG00A AG00C AK01A AK01C AK41A AK41C AK47A AK47C AT00B AT00D AT00E BA01 BA05 BA06 BA10C BA10D BA10E DC01A DC01C DG13A DG13C02A DG18A 00 DG18A DG18A DG18A BB03 EA00 FA06

Claims (8)

[Claims] 1. A double knitted fabric made of a double Russell three-dimensional knitted fabric, in which a binding yarn for setting the thickness between the front and back textures intersects perpendicularly to integrally bond the front and back textures. Formed,
The front and back tissues are each composed of a thin knit part and a thick knit part where the left and right thin knit parts are joined, and the thick knit parts are intermittently connected in series,
And the adjacent thick knitted part makes one pitch phase difference in the vertical direction,
The fine knitted portion is formed by branching the thick knit portion into two right and left branches, and the left and right thin knit portions are joined to form an adjacent thick knit portion, thereby forming a stitch. Composed of
A soft porous core material for a resin honeycomb molded body, wherein a single yarn of synthetic fiber is mainly used as a binding yarn, a mineral fiber bundle yarn is selectively mixed, and a three-dimensional shape is fixed by heat setting. 2. The soft material for a resin honeycomb molded body according to claim 1, wherein the mineral fiber is one selected from a simple substance and a composite of carbon fiber, glass fiber, and Kepler fiber. Porous core material. 3. The mixing of the synthetic fiber and the mineral fiber in the binding yarn is selected from any of ply twisting, aligning, and alternately arranging along the longitudinal direction of the thick knit portion and the thin knit portion. The soft porous core material for a resin honeycomb molded body according to any one of claims 1 and 2, characterized in that: 4. The resin honeycomb molding according to claim 1, wherein the mixing ratio of the mineral fibers to the synthetic fibers in the binding yarn is 20% by volume to 50% by volume. Soft porous core material for body. 5. A double knitted fabric made of a double Russell three-dimensional knitted fabric, wherein a binding yarn for setting the thickness is interposed orthogonally between the surface structure and the back structure to integrally bond the front and back structures. Formed,
The front and back tissues are each composed of a thin knit part and a thick knit part where the left and right thin knit parts are joined, and the thick knit parts are intermittently connected in series,
And the adjacent thick knitted part makes one pitch phase difference in the vertical direction,
The thin knitted portion is formed by dividing the thick knit portion into two right and left branches, and the left and right thin knit portions are joined to form an adjacent thick knit portion to form a stitch, and the front and back texture is a synthetic fiber bundle yarn. The binding yarn is composed mainly of synthetic fiber single yarn, mineral fiber bundle yarn is selectively mixed, and a soft porous core material whose three-dimensional shape is fixed by heat setting is impregnated with a soft syrup-like compound resin. A resin honeycomb molded body characterized in that the molded body has elasticity in a thickness direction of the molded body due to elasticity of a binding yarn. 6. An intervening cloth layer impregnated with a compounded resin between a plurality of soft porous core members made of a double Russell three-dimensional knitted fabric in which binding yarns are perpendicular to a front structure and a back structure. A double honeycomb is formed by being sandwiched and integrally formed, and on the front and back surfaces of the double honeycomb, an interposed cloth layer impregnated with a compounded resin is laminated and integrally formed, and by the elasticity of the binding yarn, A resin honeycomb molded body characterized by having elasticity in a thickness direction of the molded body. 7. A soft porous core material composed of a double Russell three-dimensional knitted fabric in which binding yarns are orthogonally interposed between a front structure and a back structure, and are integrally formed with a preformed preformed body interposed between a plurality of soft porous core materials. A double honeycomb is formed by bonding, on the front and back surfaces of the double honeycomb, preformed pre-formed bodies are respectively laminated and integrally formed, and provided with elasticity in a thickness direction by elasticity of a binding yarn. A resin honeycomb molded body characterized by being formed. 8. An intervening cloth layer impregnated with a compounded resin is sandwiched between a plurality of soft porous core members made of a double-raser three-dimensional knitted fabric in which binding yarns are orthogonal to each other between a front structure and a back structure. Forming a double honeycomb by integral molding with
On the front and back surfaces of the double honeycomb, the interposed fabric layers impregnated with the compounded resin are each laminated and integrally molded by a molding die. A method for manufacturing a resin honeycomb molded body, characterized by having elasticity in a thickness direction.