A method for producing an oblique fiber honeycomb core

Abstract

This invention provides a method for preparing oblique fiber honeycomb core material, comprising the following steps: A) designing a coating roller, wherein the adhesive lines of the coating roller form an acute angle with the axis of the coating roller; B) using the coating roller in step A) to transfer the adhesive to the surface of the woven fabric, obtaining a woven fabric coated with adhesive lines; C) cutting the woven fabric obtained in step B) to obtain several woven fabric strips; D) stacking the woven fabric strips sequentially to obtain multiple layers of woven fabric strips; E) curing the multiple layers of woven fabric strips with adhesive, and then stretching them to obtain oblique fiber honeycomb core material. This application also provides a method for preparing oblique fiber honeycomb core material with a different cutting direction for the woven fabric, but which can still achieve the same result. The method for preparing oblique fiber honeycomb core material provided by this application is simple to operate, can directly use traditional honeycomb core material production equipment, has high production efficiency, and the oblique fiber honeycomb core material prepared by this application can significantly improve the shear modulus of the honeycomb core material.

Description

Technical Field

[0001] This invention relates to the field of woven fabric processing technology, and in particular to a method for preparing oblique fiber honeycomb core material. Background Technology

[0002] Hexagonal honeycomb core material, made primarily of fiberglass cloth, was the main sandwich material for early radar radomes. Due to the limitations of the heat resistance of materials such as aramid paper and aluminum alloy foil, fiberglass cloth has become the preferred material for high-temperature resistant honeycomb core materials.

[0003] Fiberglass cloth is woven from densely packed fiberglass yarns arranged in two mutually perpendicular directions. Therefore, the performance of fiberglass honeycomb core materials is related to the angle of the fibers within the honeycomb core material. Oblique fiber honeycomb core materials (such as...) form a 45° angle between the warp (weft) direction of the fiberglass and the direction of the honeycomb core material's pores. Figure 1 (See right figure). Its shear modulus in the L and W directions is higher than that of conventional glass fiber cloth honeycomb core materials (where the warp (weft) direction of the glass fiber is at 90° or 0° to the pore direction of the honeycomb core material, such as...). Figure 1 (Left figure) More than 50% larger, therefore, the preparation method of oblique fiber honeycomb core material is an important method to obtain high modulus glass cloth honeycomb core material.

[0004] The existing method for preparing oblique fiber honeycomb core materials includes the following steps: 1) obliquely cutting glass fiber cloth (the cut is at 45° to the fiber); 2) splicing the obliquely cut glass fiber cloth; 3) applying adhesive longitudinally to the spliced ​​glass fiber cloth to create adhesive lines; 4) staggering the glass fiber cloth from step 3) to form a laminated board; 5) subsequent steps are consistent with the steps of the stretching method for manufacturing honeycomb core materials, i.e., adhesive curing, stretching, etc. This preparation method has low production efficiency and complex process. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a method for preparing oblique fiber honeycomb core material. This method can use traditional honeycomb core material production equipment, has high production efficiency, and can significantly improve the shear modulus of honeycomb core material.

[0006] In view of this, this application provides a method for preparing oblique fiber honeycomb core material, comprising the following steps:

[0007] A) Design an adhesive coating roller in which the adhesive lines of the coating roller form an acute angle with the axis of the coating roller, and the adhesive lines are completely distributed on the roller surface of the coating roller;

[0008] B) Using the adhesive roller from step A), the adhesive is transferred to the surface of the woven fabric to obtain a woven fabric coated with adhesive lines;

[0009] C) Cut the woven fabric obtained in step B) to obtain several woven fabric strips, with the cut of each woven fabric strip at a 90° angle to the adhesive line;

[0010] D) The woven strips are laid out in sequence, with adhesive lines between adjacent woven strips, and the adhesive lines form the hexagonal sides of the honeycomb core material to obtain multi-layer woven strips;

[0011] E) The multi-layer woven strips are cured with an adhesive and then stretched to obtain oblique fiber honeycomb core material.

[0012] This application also provides a method for preparing oblique fiber honeycomb core material, comprising the following steps:

[0013] A) Design an adhesive coating roller in which the adhesive lines of the coating roller form an acute angle with the axis of the coating roller, and the adhesive lines are completely distributed on the roller surface of the coating roller;

[0014] B) Using the adhesive roller from step A), the adhesive is transferred to the surface of the woven fabric to obtain a woven fabric coated with adhesive lines;

[0015] C) Cut the woven fabric along the direction of the adhesive lines or perpendicular to the direction of adhesive application to obtain several strips of woven fabric;

[0016] D) The woven strips are laid out in sequence, with adhesive lines between adjacent woven strips, and the adhesive lines form the hexagonal sides of the honeycomb core material to obtain multi-layer woven strips;

[0017] E) The multi-layer woven fabric strips are cured with an adhesive to obtain a woven fabric laminate. The woven fabric laminate is cut with the cut at 90° to the adhesive line. Finally, it is stretched to obtain a diagonal fiber honeycomb core material.

[0018] Preferably, in step A), the acute angle is 20 to 80°.

[0019] Preferably, in step A), the acute angle is 30 to 60°.

[0020] Preferably, in step A), the pitch of adjacent adhesive lines on the coating roller is four times the side length of the oblique fiber honeycomb core material pores.

[0021] Preferably, the adhesive is cured at a temperature of 100–200°C, a pressure of 0.1–2.0 MPa, and a time of 30–600 min.

[0022] Preferably, the stretching is performed on a stretching machine to unfold into a hexagonal perforated fiber cloth honeycomb core material.

[0023] Preferably, the woven fabric is an organic or inorganic fiber woven fabric such as glass fiber cloth, carbon fiber cloth, or basalt fiber cloth.

[0024] This application provides a method for preparing oblique fiber honeycomb core material. The method involves designing adhesive lines at a certain angle to the axis of an adhesive coating roller on its surface, then applying these adhesive lines at an angle to the yarns of a woven fabric using the same roller. Before layup, the cut is made perpendicular to the adhesive lines, or the same cutting method used in traditional honeycomb systems (the cut is along the direction of the adhesive lines or perpendicular to the direction of adhesive application). Before or after adhesive curing, the cut is made perpendicular to the adhesive lines. This method yields the oblique fiber honeycomb core material. This preparation method is simple to operate, can be directly applied using traditional honeycomb core material production equipment, has high production efficiency, and the oblique fiber honeycomb core material prepared in this application can significantly improve the shear modulus of the honeycomb core material. Attached Figure Description

[0025] Figure 1 These are schematic diagrams of the conventional fiber honeycomb core material and the oblique fiber honeycomb core material of the present invention;

[0026] Figure 2 This is a schematic diagram of the honeycomb core material in various directions;

[0027] Figure 3 This is a schematic diagram of the coating roller used to prepare the 45° inclined glass cloth honeycomb core material in Example 1;

[0028] Figure 4 This is a schematic diagram of the fiberglass cloth with adhesive lines coated on one side in Example 1;

[0029] Figure 5 This is a schematic diagram of the glass fiber cloth after cutting in Example 1;

[0030] Figure 6 This is a schematic diagram of the coating roller used to prepare the 30° inclined glass cloth honeycomb core material in Example 2;

[0031] Figure 7 This is a schematic diagram of the fiberglass cloth with adhesive lines coated on one side in Example 2;

[0032] Figure 8 This is a schematic diagram of the glass fiber cloth after cutting in Example 2. Detailed Implementation

[0033] To further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and are not intended to limit the scope of the claims of the present invention.

[0034] In view of the complexity of existing methods for preparing oblique fiber honeycomb core materials, this application employs a specific coating roller design method and a specific woven fabric cutting scheme or laminated plate cutting scheme to achieve the preparation of oblique fiber honeycomb core materials. This preparation method is simple and fast, and can significantly improve the shear modulus of the honeycomb core material. Specifically, this invention discloses a method for preparing oblique fiber honeycomb core materials, including the following steps:

[0035] A) Design an adhesive coating roller in which the adhesive lines of the coating roller form an acute angle with the axis of the coating roller, and the adhesive lines are completely distributed on the roller surface of the coating roller;

[0036] B) Using the adhesive roller from step A), the adhesive is transferred to the surface of the woven fabric to obtain a woven fabric coated with adhesive lines;

[0037] C) Cut the woven fabric obtained in step B) to obtain several woven fabric strips, with the cut of each woven fabric strip at a 90° angle to the adhesive line;

[0038] D) The woven strips are laid out in sequence, with adhesive lines between adjacent woven strips, and the adhesive lines form the hexagonal sides of the honeycomb core material to obtain multi-layer woven strips;

[0039] E) The multi-layer woven strips are cured with an adhesive and then stretched to obtain oblique fiber honeycomb core material.

[0040] The oblique fiber honeycomb core material involved in this application is characterized by the warp (weft) threads of the woven fabric constituting the honeycomb core material not being parallel to the direction of the honeycomb core material's pores. A dimensional diagram is shown below. Figure 2 As shown, T represents the thickness (or height, or pore direction) of the core material, W represents the unfolding direction of the core material, L represents the strip direction of the core material, and B represents the width of the core material unit wall.

[0041] Based on this, this application first designs a coating roller for oblique fiber honeycomb core material, wherein the adhesive lines form an acute angle with the axis of the coating roller, and the adhesive lines cover the entire surface of the coating roller. The adhesive lines in this application include adhesive, which is a material that bonds woven fabrics together or acts as an adhesive. The coating method of the adhesive lines on the coating roller follows methods well known to those skilled in the art, and this application does not impose any particular limitations on this. Further, the acute angle is 20–80°, more specifically 30–60°. In this application, the adhesive lines can be straight lines or curves, and this application does not impose any particular limitations on this. The pitch of adjacent adhesive lines on the coating roller is four times the side length of the oblique fiber honeycomb core material's pores.

[0042] This application then uses a coating machine and a coating roller to transfer the adhesive to the surface of the pre-impregnated woven fabric, resulting in a woven fabric coated with adhesive lines, i.e., the surface of the woven fabric is coated with adhesive lines at a certain angle to the warp (weft) threads of the woven fabric; the woven fabric is then cut to obtain several strips of woven fabric, with the cut of each strip at a 90° angle to the adhesive lines. Specifically, the adhesive transfer process involves using a coating roller to apply the adhesive to one surface of the woven fabric, or using a coating roller to apply the adhesive to both sides of the woven fabric.

[0043] According to the present invention, the above-mentioned woven fabric strips are then placed on a stacking table and laid out in the same way as the hexagonal honeycomb layering method, so that the adhesive lines form the hexagonal sides of the honeycomb core material, until the required number of layers is reached, resulting in a multi-layer stacked woven fabric strip. The specific stacking method of the woven fabric varies depending on the location of the adhesive lines in the woven fabric: if one side of the woven fabric is coated with adhesive lines, then the woven fabrics coated with adhesive lines are placed sequentially, and the adhesive lines between layers are offset by twice the nominal hexagonal side length, that is, the adhesive lines of the later layer of woven fabric strip are located at the center of the adjacent adhesive lines of the previous layer of woven fabric strip; if both sides of the woven fabric are coated with adhesive lines, then the woven fabrics coated with adhesive lines are placed in even-numbered layers, and the adhesive lines on both sides are offset by two nominal hexagonal side lengths.

[0044] This application then cures the multi-layer woven strips with an adhesive in a hot press to obtain a woven fabric laminate, and finally stretches it to obtain a slanted fiber honeycomb core material. The stretching is the process of unfolding the laminate into a core material in the W direction (stack direction). The adhesive is cured at a temperature of 100–200°C, a pressure of 0.1–2.0 MPa, and a time of 30–600 min.

[0045] Depending on the cutting method of the woven fabric, this application also provides a method for preparing oblique fiber honeycomb core material, including the following steps:

[0046] A) Design an adhesive coating roller in which the adhesive lines of the coating roller form an acute angle with the axis of the coating roller, and the adhesive lines are completely distributed on the roller surface of the coating roller;

[0047] B) Using the adhesive roller from step A), the adhesive is transferred to the surface of the woven fabric to obtain a woven fabric coated with adhesive lines;

[0048] C) Cut the woven fabric along the direction of the adhesive lines or perpendicular to the direction of adhesive application to obtain several strips of woven fabric;

[0049] D) The woven strips are laid out in sequence, with adhesive lines between adjacent woven strips, and the adhesive lines form the hexagonal sides of the honeycomb core material to obtain multi-layer woven strips;

[0050] E) The multi-layer woven fabric strips are cured with an adhesive to obtain a woven fabric laminate. The woven fabric laminate is cut with the cut at 90° to the adhesive line. Finally, it is stretched to obtain a diagonal fiber honeycomb core material.

[0051] In this preparation method, steps A) and B) are the same as those described above, and will not be repeated here.

[0052] According to the present invention, the woven fabric is then cut along the direction of the adhesive lines or perpendicular to the direction of adhesive application to obtain several strips of woven fabric.

[0053] This application then sequentially lays the aforementioned woven strips in the same manner as a normal hexagonal honeycomb layer, so that the adhesive lines form the hexagonal sides of the honeycomb core material, until the required number of layers is reached, resulting in a multi-layered stacked woven strip. The specific stacking method of the woven fabric varies depending on the location of the adhesive lines: if one side of the woven fabric is coated with adhesive lines, then the woven fabrics coated with adhesive lines are placed sequentially, with the adhesive lines between layers offset by twice the nominal hexagonal side length, meaning the adhesive lines of the later layer are located at the center of the adjacent adhesive lines of the previous layer; if both sides of the woven fabric are coated with adhesive lines, then the woven fabrics coated with adhesive lines are placed in even-numbered layers, with the adhesive lines on both sides offset by two nominal hexagonal side lengths.

[0054] Finally, the stacked multi-layered woven fabric strips are cured with an adhesive to obtain a woven fabric laminate. This laminate is then cut at a 90° angle to the adhesive lines and stretched to obtain the oblique fiber honeycomb core material. The adhesive is cured at a temperature of 100–200°C, a pressure of 0.1–2.0 MPa, and a time of 30–600 min.

[0055] The woven fabric involved in this application can be glass fiber cloth or carbon fiber cloth, and any conventional woven fabric in the art is acceptable. This application does not have any particular restrictions on this.

[0056] The method for preparing oblique fiber honeycomb core material provided in this application can utilize existing honeycomb core material production equipment without the need to manufacture special equipment; it has high production efficiency and low production cost, and can be widely promoted and used; the angle of the oblique fiber can be adjusted arbitrarily, so the honeycomb performance can be adjusted according to design needs; the oblique adhesive lines can also be changed from straight lines to curves, which can manufacture honeycomb core materials with curved pores, and has great application value in fields such as stealth.

[0057] To further understand the present invention, the preparation method of the oblique fiber honeycomb core material provided by the present invention will be described in detail below with reference to the embodiments. The scope of protection of the present invention is not limited by the following embodiments.

[0058] Example 1: Preparation method of 3mm side length 45° inclined glass cloth honeycomb core material

[0059] 1) The materials and process conditions used are as follows:

[0060] a) The fiberglass cloth is a plain weave fiberglass cloth with a nominal thickness of 0.1mm and a nominal weight of 100g.

[0061] b) The glue applicator is a 600mm wide gravure glue applicator;

[0062] c) The adhesive is: J-80BNOMEX paper honeycomb sandwich adhesive produced by the Petrochemical Research Institute of Heilongjiang Academy of Sciences;

[0063] 2) The preparation method includes the following steps:

[0064] a) Design a coating roller for manufacturing 3mm side length, 45° inclined glass cloth honeycomb core material. The unfolded diagram of the coating roller is shown below. Figure 3 As shown, the adhesive lines of the coating roller form a 45° angle with the axis of the coating roller, the adhesive lines cover the entire surface of the coating roller, and the pitch between the adhesive lines is 12mm;

[0065] b) Using the coating roller from step a), apply the adhesive to one side of the pre-impregnated fiberglass cloth using a coating machine, forming a layer as shown in the image. Figure 4 The fiberglass cloth shown has adhesive lines applied to it;

[0066] c) Cut the fiberglass cloth coated with adhesive lines from step b) into strips; the cut should be at a 90° angle to the adhesive lines. See the cutting diagram below. Figure 5 ;

[0067] d) Lay the fiberglass cloth from step c) on the stacking table in the same way as the normal hexagonal honeycomb stacking method: the adhesive lines between the layers are staggered by twice the width of the nominal hexagonal side length (the adhesive line of the next layer is located at the center of the two adjacent adhesive lines of the previous layer), until the required number of layers is reached.

[0068] e) Place the multilayer glass fiber cloth from step d) in a hot press, wherein the temperature is set to 180℃±5℃, the pressure is set to 0.5Mpa±0.05Mpa, and the pressing time is set to 180±5 minutes to complete the curing of the adhesive and form a glass fiber cloth laminate with cured adhesive.

[0069] f) Unfold the fiberglass cloth laminate from step e) on a stretching machine to form a hexagonal fiberglass cloth honeycomb core material, resulting in a material with a side length of 3mm and a density of approximately 54kg / m³. 3 The fiber optic glass fiber cloth honeycomb core material has a 45° skew angle.

[0070] Or prepare it according to the following method:

[0071] Steps a) and b) are the same as described above;

[0072] g) Cut the fiberglass cloth coated with adhesive lines from step b) along the axis of the coating roller. Lay the cut fiberglass cloth on the stacking table in the same way as the normal hexagonal honeycomb stacking method: the adhesive lines between layers are staggered by twice the width of the nominal hexagonal side (the adhesive lines of the next layer are located at the center of the two adjacent adhesive lines of the previous layer), until the required number of layers is reached.

[0073] h) Place the glass fiber cloth laminate from step g) in a hot press, wherein the temperature is set to 180℃±5℃, the pressure is set to 0.5Mpa±0.05Mpa, and the pressing time is set to 180±5 minutes to complete the curing of the adhesive and form a glass fiber cloth laminate with cured adhesive.

[0074] i) Cut the laminate from step h) into strips; the cut should be at a 90° angle to the adhesive line, as shown in the diagram. Figure 5 As shown;

[0075] j) Unfold the glass fiber cloth laminate from step i) on a stretching machine to form a hexagonal honeycomb core material, resulting in a material with a side length of 3 mm and a density of approximately 54 kg / m³. 3 The fiber optic honeycomb is inclined at ±45°.

[0076] The aforementioned 3mm side length, fiber optic honeycomb core material with a fiber skew angle of ±45° was impregnated with F01-36 alcohol-soluble phenolic varnish, resulting in a final core material density of 64.7 kg / m³. 3 The performance of the oblique glass fiber honeycomb core material prepared in this embodiment was tested. The test results were as follows: L-direction shear strength was 2.34 MPa, modulus was 172 MPa, W-direction shear strength was 1.31 MPa, and modulus was 83.8 MPa; for the corresponding specification of 0° (90°) glass fiber cloth honeycomb core material, the L-direction shear strength was 2.12 MPa, modulus was 95.6 MPa, W-direction shear strength was 1.13 MPa, and modulus was 49.3 MPa.

[0077] Example 2: Preparation method of 2mm side length 30° (60°) inclined glass cloth honeycomb core material

[0078] 1) The materials and process conditions used are as follows:

[0079] a) The fiberglass cloth is plain weave fiberglass cloth with a nominal thickness of 0.05mm and a nominal basis weight of 48g / ㎡;

[0080] b) The glue applicator is a 600mm wide gravure glue applicator;

[0081] c) The adhesive is: J-80BNomex Paper Honeycomb Sandwich Adhesive produced by the Petrochemical Research Institute of Heilongjiang Academy of Sciences;

[0082] 2) The preparation method includes the following steps:

[0083] a) Design a coating roller for manufacturing 2mm side length, 30° inclined glass cloth honeycomb core material. The unfolded diagram of the coating roller is shown below. Figure 6 As shown, the adhesive lines on the coating roller form a 30° angle with the roller axis, the adhesive lines cover the entire roller surface, and the pitch between the adhesive lines is 8.0 mm.

[0084] b) Using the coating roller from step a), apply the adhesive to one side of the pre-impregnated fiberglass cloth using a coating machine, forming a layer as shown in the image. Figure 7 The fiberglass cloth shown is coated with adhesive lines;

[0085] c) Cut the fiberglass cloth coated with adhesive lines from step b) into strips; the cut should be at a 90° angle to the adhesive lines, as shown in the diagram. Figure 8 As shown;

[0086] d) Lay the fiberglass cloth from step c) on the stacking table in the same way as the normal hexagonal honeycomb stacking method: the adhesive lines between the layers are staggered by twice the width of the nominal hexagonal side length (the adhesive line of the next layer is located at the center of the two adjacent adhesive lines of the previous layer), until the required number of layers is reached.

[0087] e) Place the multilayer glass fiber cloth from step d) on a hot press, wherein the temperature is set to 180℃±5℃, the pressure is set to 0.5Mpa±0.05Mpa, and the pressing time is set to 180±5 minutes to complete the curing of the adhesive and form a glass fiber cloth laminate with cured adhesive.

[0088] f) Unfold the fiberglass cloth laminate from step e) on a stretching machine to form a hexagonal fiberglass cloth honeycomb core material, resulting in a material with a side length of 2mm and a density of approximately 40kg / m³. 3 Fiber optic honeycomb with a 30° (60°) skew angle;

[0089] Or prepare it according to the following method:

[0090] Steps a) and b) are the same as described above;

[0091] g) Cut the fiberglass cloth coated with adhesive lines from step b) along the direction of the adhesive lines. Lay the cut fiberglass cloth on the stacking table in the same way as the normal hexagonal honeycomb stacking method: the adhesive lines between layers are staggered by twice the width of the nominal hexagonal side (the adhesive lines of the next layer are located at the center of the two adjacent adhesive lines of the previous layer), until the required number of layers is reached.

[0092] h) Place the glass fiber cloth laminate from step g) on ​​a hot press, wherein the temperature is set to 180℃±5℃, the pressure is set to 0.5Mpa±0.05Mpa, and the pressing time is set to 180±5 minutes to complete the curing of the adhesive and form a glass fiber cloth laminate with cured adhesive.

[0093] i) Cut the laminate from step h) into strips; the cut should be at a 90° angle to the adhesive line, see the cutting diagram. Figure 8 ;

[0094] j) Unfold the fiberglass cloth laminate from step i) on a stretching machine to form a hexagonal honeycomb core material, resulting in a material with a side length of 2mm and a density of approximately 40kg / m³. 3 Fiber optic honeycomb with a 30° (60°) slant angle.

[0095] The aforementioned 2mm side length, 30° (60°) skewed glass fiber cloth honeycomb core material was impregnated with F01-36 alcohol-soluble phenolic varnish, resulting in a final core material density of 65.3 kg / m³. 3 The performance of the oblique glass fiber honeycomb core material prepared in this embodiment was tested. The test results were as follows: L-direction shear strength was 2.17 MPa, modulus was 193 MPa, W-direction shear strength was 1.03 MPa, and modulus was 82.8 MPa; for the corresponding specification of 0° (90°) glass fiber cloth honeycomb core material, the L-direction shear strength was 1.89 MPa, modulus was 86.6 MPa, W-direction shear strength was 0.86 MPa, and modulus was 43.2 MPa.

[0096] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0097] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a slanted fiber honeycomb core material, comprising the following steps: A) Design an adhesive coating roller in which the adhesive lines are at an acute angle to the axis of the roller, and the adhesive lines are completely distributed on the roller surface; the acute angle is 20~80°. B) Using the adhesive roller from step A), the adhesive is transferred to the surface of the woven fabric to obtain a woven fabric coated with adhesive lines; C) Cut the woven fabric obtained in step B) to obtain several woven fabric strips, with the cut of each woven fabric strip at a 90° angle to the adhesive line; D) The woven strips are laid out in sequence, with adhesive lines between adjacent woven strips, and the adhesive lines form the hexagonal sides of the honeycomb core material to obtain multi-layer woven strips; E) The multi-layer woven strips are cured with an adhesive and then stretched to obtain oblique fiber honeycomb core material.

2. A method for preparing a slanted fiber honeycomb core material, comprising the following steps: A) Design an adhesive coating roller in which the adhesive lines are at an acute angle to the axis of the roller, and the adhesive lines are completely distributed on the roller surface; the acute angle is 20~80°. B) Using the adhesive roller from step A), the adhesive is transferred to the surface of the woven fabric to obtain a woven fabric coated with adhesive lines; C) Cut the woven fabric along the direction of the adhesive lines or perpendicular to the direction of adhesive application to obtain several strips of woven fabric; D) The woven strips are laid out in sequence, with adhesive lines between adjacent woven strips, and the adhesive lines form the hexagonal sides of the honeycomb core material to obtain multi-layer woven strips; E) The multi-layer woven strips are cured with an adhesive to obtain a woven fabric laminate. The woven fabric laminate is cut with the cut at 90° to the adhesive line. Finally, it is stretched to obtain a slanted fiber honeycomb core material.

3. The production method according to claim 1 or 2, characterized by, In step A), the acute angle is 30~60°.

4. The production method according to claim 1 or 2, characterized by, In step A), the pitch of adjacent adhesive lines on the coating roller is 4 times the side length of the oblique fiber honeycomb core material pores.

5. The preparation method according to claim 1 or 2, characterized in that, The adhesive is cured at a temperature of 100~200℃, a pressure of 0.1~2.0MPa, and a time of 30~600min.

6. The preparation method according to claim 1 or 2, characterized in that, The stretching is specifically performed on a stretching machine to unfold it into a hexagonal perforated fiber cloth honeycomb core material.

7. The preparation method according to claim 1, characterized in that, The woven fabric is glass fiber cloth, carbon fiber cloth, or basalt fiber cloth.

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