CN113439906B

CN113439906B - Aviation protection helmet body and preparation method thereof

Info

Publication number: CN113439906B
Application number: CN202110672996.0A
Authority: CN
Inventors: 李强; 朱露; 胡辉; 刘忠
Original assignee: Jiangxi Lianchuang Electroacoustics Co ltd
Current assignee: Jiangxi Lianchuang Electroacoustics Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2023-08-11
Anticipated expiration: 2041-06-17
Also published as: CN113439906A

Abstract

The invention provides an aviation protection helmet body and a preparation method thereof, wherein the aviation protection helmet body is composed of the following four materials: orthogonal plain weave twisted aramid cloth prepreg; left-inclined 45-degree satin aramid cloth prepreg; ultra-high molecular weight polyethylene orthoplait type I prepreg; ultra-high molecular weight polyethylene orthorhombic plain cloth type II prepreg. According to the aviation protection helmet body and the preparation method thereof provided by the invention, through the dominant collocation of a plurality of polymer materials with different characteristics, the superposition effect of dominant performances generated by different materials is ensured, the helmet protection capability is greatly improved, in addition, the strain rate sensitive self-adaptive material of polyborosiloxane is blended in the materials for modification, the absorption capability of the product on collision impact is further improved, the impact energy can be offset and absorbed to the greatest extent, and the head of personnel is protected.

Description

Aviation protection helmet body and preparation method thereof

Technical Field

The invention relates to the technical field of protective equipment, in particular to an aviation protective helmet body and a preparation method thereof.

Background

The aviation protection helmet is used for protecting the head of an aircraft pilot and is used in the aircraft pilot process. If a serious failure of the aircraft is encountered, an emergency exit from the aircraft is required, and the process requires wearing helmets to provide reliable head protection for the pilot.

Therefore, an aviation protection helmet with high protection performance is of great importance to the life safety of flight personnel. Then, the existing aviation protection helmet body still has the problem that the protective capability is poor, can't provide reliable protection to flight personnel after the aircraft trouble.

Disclosure of Invention

The invention aims to provide an aviation protection helmet body and a preparation method thereof, which are used for solving the problem of poor protection capability in the prior art.

An aviation protection helmet body is composed of the following four materials:

orthogonal plain weave twisted aramid cloth prepreg;

left-inclined 45-degree satin aramid cloth prepreg;

ultra-high molecular weight polyethylene orthoplait type I prepreg;

ultra-high molecular weight polyethylene orthorhombic plain cloth type II prepreg.

The orthogonal plain weave twisted aramid fabric prepreg consists of orthogonal plain weave aramid fabric and modified epoxy resin, wherein the modified epoxy resin consists of epoxy resin and a polyborosiloxane strain rate sensitive self-adaptive material;

the structure form of the orthogonal plain aramid fiber cloth is as follows:

twisting the aramid fiber cloth precursor in a Z direction;

warp and weft density: (75X 75). + -. 5 roots/10 cm;

areal density: 340+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave.

Wherein, the combination process of the orthogonal plain aramid cloth and the modified epoxy resin is a solvent impregnation method.

The left-inclined 45-degree satin aramid fabric prepreg consists of left-inclined 45-degree satin aramid fabric and epoxy resin;

the left inclined 45-degree satin aramid fabric has the structural form that:

the aramid cloth adopts a precursor non-twisting structure;

warp and weft density: (66X 66). + -. 5 roots/10 cm;

the areal density is: 220+ -5 g/m ² ；

The knitting mode is as follows: left 45 deg. satin.

The ultra-high molecular weight polyethylene orthogonal plain cloth I-type prepreg consists of ultra-high molecular weight polyethylene orthogonal plain cloth I-type and modified epoxy resin, wherein the modified epoxy resin consists of epoxy resin and a polyborosiloxane strain rate sensitive self-adaptive material;

the ultra-high molecular weight polyethylene orthogonal plain cloth I type structure is characterized in that:

the ultra-high molecular weight polyethylene orthogonal plain cloth is twisted in the Z direction by adopting a precursor;

warp and weft density: (100X 100). + -. 5 roots/10 cm;

areal density: 300+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave.

Wherein, the combination process of the ultra-high molecular weight polyethylene orthogonal plain cloth I type and the modified epoxy resin is a solvent impregnation method.

The ultra-high molecular weight polyethylene orthogonal plain cloth II-type prepreg consists of ultra-high molecular weight polyethylene orthogonal plain cloth II-type and modified epoxy resin, wherein the modified epoxy resin consists of epoxy resin and a polyborosiloxane strain rate sensitive self-adaptive material;

the structural morphology of the ultra-high molecular weight polyethylene orthogonal plain cloth II type is as follows:

warp and weft density: (150X 150). + -. 5 roots/10 cm;

areal density: 400+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave.

Wherein, the combination process of the ultra-high molecular weight polyethylene orthogonal plain cloth II type and the modified epoxy resin is a solvent impregnation method.

The preparation method of the aviation protection helmet body comprises the following steps:

cutting the orthogonal plain weave twisted aramid fiber cloth prepreg, the left inclined 45-degree satin aramid fiber cloth prepreg, the ultra-high molecular weight polyethylene orthogonal plain weave cloth type I prepreg and the ultra-high molecular weight polyethylene orthogonal plain weave cloth type II prepreg according to preset shapes respectively, and attaching the cut pieces to a silica gel air bag die layer by layer in sequence;

and (3) placing the silica gel air bag die into the metal outer die, closing the metal outer die, pressurizing and insulating the silica gel inner die to finish the epoxy modified resin thermosetting of each aramid fiber and the ultra-high molecular weight polyethylene fabric material under a preset process, so that various materials are integrally cured and bonded to form the aviation protection helmet body.

The orthogonal plain weave twisted aramid fiber cloth prepreg, the left inclined 45-degree satin aramid fiber cloth prepreg, the ultra-high molecular weight polyethylene orthogonal plain weave cloth type I prepreg and the ultra-high molecular weight polyethylene orthogonal plain weave cloth type II prepreg are respectively baked according to the following processes before being attached:

the baking process of the orthogonal plain weave twisted aramid fiber cloth prepreg comprises the following steps: the temperature is 60 ℃ and the time is 300-360 seconds;

the baking process of the left-inclined 45-degree satin aramid cloth prepreg comprises the following steps: the temperature is 45 ℃ and the time is 120-240 seconds;

the baking process of the ultra-high molecular weight polyethylene orthogonal plain cloth type I prepreg comprises the following steps: the temperature is 50 ℃ and the time is 180-300 seconds;

the baking process of the ultra-high molecular weight polyethylene orthogonal plain cloth II-type prepreg comprises the following steps: the temperature is 50 ℃ and the time is 180-300 seconds.

According to the aviation protection helmet body and the preparation method thereof provided by the invention, through the dominant collocation of a plurality of polymer materials with different characteristics, the superposition effect of dominant performances generated by different materials is ensured, the helmet protection capability is greatly improved, in addition, the strain rate sensitive self-adaptive material of polyborosiloxane is blended in the materials for modification, the absorption capability of the product on collision impact is further improved, the impact energy can be offset and absorbed to the greatest extent, and the head of personnel is protected.

Drawings

FIG. 1 is a schematic view of a cut-parts of the 1 st shape (labeled in mm, supra);

FIG. 2 is a schematic view of a cut-to-size sheet of shape 2;

FIG. 3 is a schematic view of a cut-to-size sheet of shape 3;

FIG. 4 is a schematic view of a cut-parts of the 4 th shape;

FIG. 5 is a schematic view of a cut-to-size sheet of shape 5;

FIG. 6 is a schematic view of a cut-to-size sheet of FIG. 6;

FIG. 7 is a schematic view of a cut-to-size sheet of the 7 th shape;

FIG. 8 is a schematic view of a cut-to-size sheet of shape 8;

FIG. 9 is a schematic view of a cut-to-size sheet of shape 9;

FIG. 10 is a schematic view of a 1 st shape of a reinforcing bar;

FIG. 11 is a schematic view of a reinforcing bar of shape 2;

FIG. 12 is a schematic view of a cut-to-size sheet of shape 10;

FIG. 13 is a schematic view of a cut-to-size sheet of the 11 th shape;

FIG. 14 is a schematic view of a cut-to-size sheet of shape 12;

FIG. 15 is a schematic view of a cut-to-size sheet of shape 13;

FIG. 16 is a schematic view of a cut-to-size sheet of shape 14;

FIG. 17 is a schematic view of a 15 th shaped cut piece;

FIG. 18 is a schematic view of a 16 th shape cut piece;

FIG. 19 is a schematic view of a 17 th shape cut piece;

FIG. 20 is a schematic view of a cut-to-size sheet of shape 18;

FIG. 21 is a schematic view of a cut-to-size sheet of shape 19;

FIG. 22 is a schematic view of a 20 th shape cut piece;

FIG. 23 is a schematic view of a cut-to-size sheet of shape 21;

FIG. 24 is a schematic view of a 22 nd shape cut piece;

FIG. 25 is a schematic view of a 23 rd shaped cut piece;

FIG. 26 is a schematic view of a 24 th shape cut piece;

FIG. 27 is a schematic view of a cut-to-size sheet of shape 25;

fig. 28 is a schematic view of a 26 th shaped cut piece.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

The embodiment of the invention provides an aviation protection helmet body, which is composed of the following four materials:

orthogonal plain weave twisted aramid cloth prepreg;

left-inclined 45-degree satin aramid cloth prepreg;

ultra-high molecular weight polyethylene orthoplait type I prepreg;

The orthogonal plain weave twisted aramid fabric prepreg comprises 5 parts of orthogonal plain weave twisted aramid fabric and 5 parts of modified epoxy resin, wherein the modified epoxy resin comprises 9 parts of epoxy resin and a polyborosiloxane strain rate sensitive self-adaptive material, the polyborosiloxane strain rate sensitive self-adaptive material comprises 1 part of polyborosiloxane strain rate self-adaptive material, and the combination process of the orthogonal plain weave twisted aramid fabric and the modified epoxy resin is a solvent impregnation method.

The structure form of the orthogonal plain aramid fiber cloth is as follows:

twisting the aramid fiber cloth precursor in a Z direction;

warp and weft density: (75X 75). + -. 5 roots/10 cm;

areal density: 340+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave.

The left-inclined 45-degree satin aramid fabric prepreg consists of left-inclined 45-degree satin aramid fabric and epoxy resin, wherein the area part of the left-inclined 45-degree satin aramid fabric is 15 parts.

The left inclined 45-degree satin aramid fabric has the structural form that:

the aramid cloth adopts a precursor non-twisting structure;

warp and weft density: (66X 66). + -. 5 roots/10 cm;

the areal density is: 220+ -5 g/m ² ；

The knitting mode is as follows: left 45 deg. satin.

The ultra-high molecular weight polyethylene orthogonal plain cloth I-type prepreg consists of 5 parts of ultra-high molecular weight polyethylene orthogonal plain cloth I-type and 5 parts of modified epoxy resin, wherein the modified epoxy resin consists of 9 parts of epoxy resin and a polyborosiloxane strain rate sensitive self-adaptive material, the polyborosiloxane strain rate sensitive self-adaptive material consists of 1 part of epoxy resin, and the combination process of the ultra-high molecular weight polyethylene orthogonal plain cloth I-type and the modified epoxy resin is a solvent impregnation method.

warp and weft density: (100X 100). + -. 5 roots/10 cm;

areal density: 300+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave.

The ultra-high molecular weight polyethylene orthogonal plain cloth II type prepreg consists of 5 parts of ultra-high molecular weight polyethylene orthogonal plain cloth II type and 5 parts of modified epoxy resin, wherein the modified epoxy resin consists of 9 parts of epoxy resin and a polyborosiloxane strain rate sensitive self-adaptive material, the polyborosiloxane strain rate sensitive self-adaptive material consists of 1 part of epoxy resin, and the combination process of the ultra-high molecular weight polyethylene orthogonal plain cloth II type and the modified epoxy resin is a solvent impregnation method.

warp and weft density: (150X 150). + -. 5 roots/10 cm;

areal density: 400+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave.

The invention also provides a preparation method of the aviation protection helmet body, which comprises the following steps:

Specifically, the orthogonal plain weave twisted aramid fiber cloth prepreg, the left inclined 45 degree satin aramid fiber cloth prepreg, the ultra-high molecular weight polyethylene orthogonal plain weave cloth type I prepreg and the ultra-high molecular weight polyethylene orthogonal plain weave cloth type II prepreg are respectively baked according to the following processes before being attached:

The method of making an aviation protective helmet body will now be described with a specific example.

Each aramid fiber material is attached to the silica gel air bag mold, and for the convenience of distinguishing, each part of the air bag mold is classified as follows.

1. Cutting the orthogonal plain-twisted aramid fabric prepreg into cut pieces shown in fig. 1, putting the cut pieces into an oven for baking, wherein the process is 60 ℃, the time is 300-360 seconds, after the process is finished, smoothly transiting the material, attaching the material to the back brain part of an air bag without folds, if the folds are locally arranged, cutting a 15+/-3 mm simulated type cut at the position, and overlapping the materials on two sides of the cut in an up-down lamination manner;

2. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 2, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the forehead part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

3. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 3, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the rear brain part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

4. cutting the orthogonal plain-twisted aramid fabric type I prepreg into cut pieces shown in fig. 4, baking in an oven at 60 ℃ for 300-360 seconds, smoothly transiting the material, attaching the material to the left side part of the head of the air bag without folds, if folds are locally arranged, cutting off a 15+/-3 mm simulated process cut at the position, and overlapping the materials on two sides of the cut in an up-and-down overlapping manner;

5. cutting the orthogonal plain-twisted aramid fabric type I prepreg into cut pieces shown in fig. 5, baking in an oven at 60 ℃ for 300-360 seconds, smoothly transiting the material, attaching the material to the right side of the head of the air bag without folds, if folds are locally arranged, cutting off a 15+/-3 mm simulated process cut at the position, and overlapping the materials on two sides of the cut in an up-and-down overlapping manner;

6. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 6, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the left ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

7. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 7, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the right ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

8. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 8, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the left ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

9. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 9, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the right ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

10. cutting left-inclined 45-degree satin aramid fiber cloth prepreg into reinforcing ribs as shown in fig. 10, putting the reinforcing ribs into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the forehead part of an air bag without folds; the position is not provided with a simulated engineering notch;

11. cutting left-inclined 45-degree satin aramid fabric prepreg into reinforcing ribs as shown in fig. 11, putting the reinforcing ribs into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the forehead part of an air bag without folds; the position is not provided with a simulated engineering notch;

12. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 12, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the forehead part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

13. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 13, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the rear brain part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

14. cutting the ultra-high molecular weight polyethylene orthogonal plain cloth type I prepreg into cut pieces shown in figure 14, putting the cut pieces into an oven for baking at 50 ℃ for 180-300 seconds, and attaching the material to the top of an air bag head in a smooth transition manner after finishing the process; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

15. cutting the ultra-high molecular weight polyethylene orthogonal plain cloth prepreg into cut pieces shown in figure 15, putting the cut pieces into an oven for baking, wherein the process is 50 ℃, and the time is 180-300 seconds, and after the process is completed, smoothly transiting the material and attaching the material to the right brain part of an air bag without folds; the position is not provided with a simulated engineering notch;

16. cutting the ultra-high molecular weight polyethylene orthogonal plain cloth prepreg into cut pieces shown in figure 16, putting the cut pieces into an oven for baking, wherein the process is 50 ℃, and the time is 180-300 seconds, and after the process is completed, smoothly transiting the material and attaching the material to the left brain part of an air bag without folds; the position is not provided with a simulated engineering notch;

17. cutting the ultra-high molecular weight polyethylene orthogonal plain cloth II-type prepreg into cut pieces shown in figure 17, putting the cut pieces into an oven for baking at 50 ℃ for 180-300 seconds, and attaching the material to the top of an air bag head in a smooth transition manner after finishing the process; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

18. cutting the ultra-high molecular weight polyethylene orthogonal plain cloth II-type prepreg into cut pieces shown in figure 18, putting the cut pieces into an oven for baking at 50 ℃ for 180-300 seconds, and after finishing, smoothly transiting the material and attaching the material to the right brain part of the air bag without folds; the position is not provided with a simulated engineering notch;

19. cutting the ultra-high molecular weight polyethylene orthogonal plain cloth II-type prepreg into cut pieces shown in figure 19, putting the cut pieces into an oven for baking at 50 ℃ for 180-300 seconds, and after finishing, smoothly transiting the material and attaching the material to the left brain part of the air bag without folds; the position is not provided with a simulated engineering notch;

20. cutting the orthogonal plain-twisted aramid fabric type I prepreg into cut pieces shown in figure 20, putting the cut pieces into an oven for baking at the temperature of 60 ℃ for 300-360 seconds, smoothly transiting the material, attaching the material to the top of an air bag without folds, if folds are locally formed, cutting off a 15+/-3 mm pseudo-type engineering cut at the position, and overlapping the materials on two sides of the cut in an up-and-down lamination manner;

21. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 21, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the forehead part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

22. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 22, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the rear brain part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

23. cutting the orthogonal plain-twisted aramid fabric type I prepreg into cut pieces as shown in fig. 23, baking in an oven at 60 ℃ for 300-360 seconds, smoothly transiting the material, attaching the material to the right brain part of the air bag without folds, if folds are locally arranged, cutting off 15+/-3 mm of a simulated engineering cut at the position, and overlapping the materials on two sides of the cut up and down;

24. cutting the orthogonal plain-twisted aramid fabric type I prepreg into cut pieces shown in fig. 24, baking in an oven at 60 ℃ for 300-360 seconds, smoothly transiting the material, attaching the material to the left brain part of an air bag without folds, if folds are locally arranged, cutting off a 15+/-3 mm simulated process cut at the position, and overlapping the materials on two sides of the cut in an up-and-down overlapping manner;

25. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 25, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the left ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

26. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces shown in fig. 26, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the right ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

27. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 27, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the right ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

28. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces as shown in fig. 28, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the left ear part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, and materials on two sides of the notch are overlapped up and down;

29. cutting left-inclined 45-degree satin aramid fabric prepreg into cut pieces with specific shapes, putting the cut pieces into an oven for baking, and smoothly transiting the material after the process is completed at 45 ℃ for 120-240 seconds, and attaching the material to the rear brain part of an air bag without folds; if the part is provided with folds, a 15+/-3 mm simulated engineering notch can be cut at the position, materials on two sides of the notch are overlapped up and down,

after the process is finished, all layers of materials attached to the air bag mold are put into a metal outer film, gas is flushed into the air bag mold, the gas pressure is kept to be 1.2+/-0.1 MPa, the temperature of the metal mold is 120+/-5 ℃, the molding time is 75+/-5 min, under the process conditions, the modified epoxy resin is heated and pressed, curing is finished, and the helmet body molding is finished after the metal materials are effectively bonded.

The helmet body obtained in the above example was actually detected, and the results are shown in table 1 according to the collision and penetration resistance test method in GJB 1564A:

TABLE 1

In addition, for a helmet body of the prior art, according to the collision and penetration resistance test method in GJB1564A, the results are shown in table 2:

TABLE 2

As can be seen from comparison of tables 1 and 2, the helmet body of the present invention has the advantages of light weight, good impact resistance and penetration resistance, and optimal properties in all aspects.

In summary, according to the aviation protection helmet body and the preparation method thereof provided by the embodiment, through the advantage collocation of the polymer materials with various different characteristics, the superposition effect of the advantage performances generated by the different materials is ensured, the helmet protection capability is greatly improved, in addition, the strain rate sensitive self-adaptive material of the polyborosiloxane is blended in the materials for modification, the absorption capability of the product on collision impact is further improved, the impact energy can be offset and absorbed to the greatest extent, and the heads of personnel are protected.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An aviation protection helmet body is characterized by comprising the following four materials:

orthogonal plain weave twisted aramid cloth prepreg;

left-inclined 45-degree satin aramid cloth prepreg;

ultra-high molecular weight polyethylene orthoplait type I prepreg;

ultra-high molecular weight polyethylene orthoplait type II prepreg;

the structure form of the orthogonal plain aramid fiber cloth is as follows:

twisting the aramid fiber cloth precursor in a Z direction;

warp and weft density: (75X 75). + -. 5 roots/10 cm;

areal density: 340+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave;

the combination process of the orthogonal plain aramid cloth and the modified epoxy resin is a solvent impregnation method;

the left inclined 45-degree satin aramid fabric has the structural form that:

the aramid cloth adopts a precursor non-twisting structure;

warp and weft density: (66X 66). + -. 5 roots/10 cm;

the areal density is: 220+ -5 g/m ² ；

The knitting mode is as follows: left 45-degree satin;

warp and weft density: (100X 100). + -. 5 roots/10 cm;

areal density: 300+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave;

the combination process of the ultra-high molecular weight polyethylene orthogonal plain cloth I type and the modified epoxy resin is a solvent impregnation method;

warp and weft density: (150X 150). + -. 5 roots/10 cm;

areal density: 400+ -5 g/m ² ；

The knitting structure: two-dimensional orthogonal plain weave;

the combination process of the ultra-high molecular weight polyethylene orthogonal plain cloth type II and the modified epoxy resin is a solvent impregnation method.

2. A method of making an aviation protection helmet body according to claim 1, comprising:

3. The method for manufacturing an aviation protection helmet body according to claim 2, wherein the orthogonal plain twisted aramid fabric prepreg, the left-inclined 45 ° satin aramid fabric prepreg, the ultra-high molecular weight polyethylene orthogonal plain fabric type i prepreg, and the ultra-high molecular weight polyethylene orthogonal plain fabric type ii prepreg are baked respectively according to the following processes before attaching: