CN115067612A - Helmet made of composite material and preparation process thereof - Google Patents

Helmet made of composite material and preparation process thereof Download PDF

Info

Publication number
CN115067612A
CN115067612A CN202210923434.3A CN202210923434A CN115067612A CN 115067612 A CN115067612 A CN 115067612A CN 202210923434 A CN202210923434 A CN 202210923434A CN 115067612 A CN115067612 A CN 115067612A
Authority
CN
China
Prior art keywords
fiber
helmet
layer
molecular weight
weight polyethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210923434.3A
Other languages
Chinese (zh)
Inventor
李强
朱露
胡辉
梁志
宋崇斌
王战胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Lianchuang Electroacoustics Co ltd
Original Assignee
Jiangxi Lianchuang Electroacoustics Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangxi Lianchuang Electroacoustics Co ltd filed Critical Jiangxi Lianchuang Electroacoustics Co ltd
Priority to CN202210923434.3A priority Critical patent/CN115067612A/en
Publication of CN115067612A publication Critical patent/CN115067612A/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/283—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysiloxanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/42—Layered products comprising a layer of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B32B5/262—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a woven fabric layer
    • B32B5/263—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a woven fabric layer next to one or more woven fabric layers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
    • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/54—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • B32B2437/04—Caps, helmets

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Helmets And Other Head Coverings (AREA)

Abstract

The invention provides a helmet made of a composite material and a preparation process thereof, and relates to the technical field of helmet equipment; the helmet comprises a helmet body, wherein the helmet body comprises a composite fiber layer and a polymer layer which are sequentially arranged from outside to inside; the composite fiber layer comprises a plurality of layers of ultrahigh molecular weight polyethylene fiber and aramid fiber mixed prepreg and a plurality of layers of carbon fiber prepreg, the polymer layer is formed by injection molding of various polymers which are preferably matched and mixed according to a certain mass part, and the two functional layers are formed by twice processes and organically combined into a whole. The invention has excellent penetration resistance and collision energy absorption performance, low surface density, light weight and strong protection capability.

Description

Helmet made of composite material and preparation process thereof
Technical Field
The invention belongs to the technical field of helmet equipment, and particularly relates to a helmet made of a composite material and a preparation process of the helmet.
Background
In the modern explosion-proof task, along with the impact of a plurality of cold weapons, such as knives, axes, hammers, air rifles and the like, the helmet of the head protection equipment made of the original single polymer material is easy to break after being impacted; in order to achieve high protection, the common polymer helmet mostly adopts a mode of increasing the thickness of a helmet body, so that the weight of the helmet is continuously increased, tactical action execution is influenced after the helmet is worn, and cervical vertebra injury of a person can be caused after the helmet is worn for a long time. In addition, the helmet made of a single polymer material is susceptible to environmental factors such as external light and heat, and aging is caused, so that the protection efficiency is continuously reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a helmet made of a composite material and a preparation process thereof.
In one aspect, the invention provides a helmet made of a composite material, which comprises a helmet body, wherein the helmet body comprises a composite fiber layer and a polymer layer which are sequentially laminated from outside to inside; the composite fiber layer subjected to hot press forming is placed in an injection mold, and the polymer layer is formed through injection molding, so that the polymer layer is placed on the composite fiber layer to form the helmet body in an integral structure;
the composite fiber layer is formed by sequentially laminating a preset number of layers of ultra-high molecular weight polyethylene fiber, aramid fiber hybrid prepreg and carbon fiber prepreg;
the polymer layer is made of a modified polymer material, and the content of each component of the modified polymer material is as follows: 45-55 parts of acrylonitrile-butadiene-styrene copolymer, 25-35 parts of polycarbonate, 66-15-25 parts of nylon, 5-15 parts of polyformaldehyde, 6-10 parts of polyborosiloxane, 5-10 parts of maleic anhydride, 1-2 parts of processing aid, 0.4-0.6 part of antioxidant, 0.4-0.6 part of dicumyl peroxide and 0.1-0.3 part of paraffin oil.
Compared with the prior art, the invention has the beneficial effects that: the sandwich structure formed by the ultra-high molecular weight polyethylene fiber, the aramid fiber and the carbon fiber of the outer composite fiber layer is adopted, so that the requirements on rigidity and toughness of the composite fiber layer are well matched, high-efficiency protection can be realized, the integrity of the helmet can be maintained in high-strength impact, meanwhile, the composite fiber layer is excellent in weather resistance, strong in environmental adaptability and small in performance attenuation caused by environmental stress; the polymer layer is formed on the composite fiber layer in an injection molding mode and is organically combined into a whole, the modified polymer material of the polymer layer is used for toughening, reinforcing and improving the bending, stretching and impact strength properties, and meanwhile, the modified polymer material is combined with the composite fiber layer to achieve the effect of performance synergetic step, namely, the composite fiber layer can play the roles of skeleton and protection on the polymer layer on the basis of the advantages of the composite fiber layer, so that the polymer layer cannot be cracked when being subjected to strong impact and shearing force, and the polymer layer synergistically promotes the impact blocking and absorbing capacity of the composite fiber layer, so that the protective performance and the weather resistance of the helmet are integrally improved.
Preferably, the ultra-high molecular weight polyethylene fiber and aramid fiber hybrid prepreg is composed of orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric and unsaturated polyester.
Preferably, the warp threads of the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric are aramid yarns, the weft threads of the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric are ultra-high molecular weight polyethylene yarns, and the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric are twisted in the Z direction.
Preferably, the surface density of the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven cloth is 410g/m 2 ～450g/m 2 。
Preferably, the unsaturated polyester is thermosetting resin, and the unsaturated polyester is transferred to the surfaces of the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric by a hot-melt transfer method.
Preferably, the mass part of the unsaturated resin is 28-32% of the mass part of the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg.
Preferably, the carbon fiber prepreg is composed of left oblique twill carbon fiber machine-made cloth and epoxy resin; in the weaving process of the left oblique twill carbon fiber woven fabric, the fiber bundles are not twisted, and the epoxy resin is immersed in the carbon fiber woven fabric through a hot melting transfer method.
Preferably, the surface density of the carbon fiber prepreg is 680g/m 2 ～720g/m 2 。
In another aspect, the present invention also provides a method for preparing the helmet, including the following steps:
s10: respectively cutting the ultra-high molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg into cut pieces, and cutting cuts on the cut pieces at preset angles;
s20: laying the cut ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg on a metal hot-pressing male die for forming the helmet body layer by layer according to a preset sequence;
s30: closing the dies to carry out hot pressing, opening the dies to deflate according to preset interval time in the pressing process, and deflating for a preset duration each time;
s40: opening the mold after hot pressing is finished, taking out the formed composite fiber layer, cutting off burrs, and polishing the inner surface of the formed composite fiber layer by using abrasive paper;
s50: uniformly coating epoxy resin on the outer surface of the composite fiber layer, pasting the composite fiber layer in a female die of an injection mold, and closing the mold after completion;
s60: and injecting a prepared modified polymer material into an injection mold through an injection molding machine to form a polymer layer, and combining the polymer layer and the composite fiber layer to form an integral structure so as to complete the helmet body with the structure of the outer composite fiber layer and the inner polymer layer.
Preferably, the preparation method of the modified polymer material comprises the following steps:
s01: drying the acrylonitrile-butadiene-styrene copolymer;
s02: weighing acrylonitrile-butadiene-styrene copolymer, maleic anhydride, dicumyl peroxide and liquid paraffin oil according to a preset mass part, uniformly mixing, and then extruding and granulating in an extruder with a graft screw to obtain a compound A;
s03: weighing polycarbonate, nylon 66 and polyformaldehyde according to preset mass parts, putting the polycarbonate, the nylon 66 and the polyformaldehyde into a high-speed mixer at the temperature of 80 +/-3 ℃ for high-speed mixing, extruding and granulating in a double-screw extruder, and drying the granules in an oven at the temperature of 80 +/-5 ℃ for 2-4 hours to obtain a compound B;
s04: weighing polyborosiloxane according to a preset mass part, dispersing in deionized water to form a suspension, adjusting the pH to 9 by using a NaOH solution, adding a processing aid according to a preset mass part while stirring, performing ultrasonic oscillation for 0.5-1.5 h at normal temperature, obtaining a filter cake in a centrifuge, washing the filter cake, drying, grinding and sieving to obtain a compound C;
s05: drying the compound A, the compound B and the compound C in a dryer at the temperature of 90 +/-5 ℃ for 3-5 h, weighing a preset mass part of antioxidant, putting the antioxidant into a high-speed mixer together, stirring uniformly, and extruding and granulating in a co-rotating double-screw extruder to obtain the modified polymer material.
Compared with the prior art, the invention has the beneficial effects that: through the preparation process, the composite fiber layer structure formed by hot pressing has high specific strength and specific modulus, the weight of equipment is effectively reduced under the condition of equal or higher protection effect, after the equipment is impacted by the outside, under the action of comprehensive superior properties such as high tensile strength, low elongation at break, high impact strength and the like, the impact force can be rapidly dispersed, the impact force is transferred to a large area from a small-area effect, the impact kinetic energy is consumed, the impact force penetrating into a helmet is reduced, and the penetration of sharp instruments can be prevented; and after the polymer layer is subjected to the external impact action of reducing kinetic energy and increasing the action area, the modified polymer material can provide larger impact energy absorption margin, quickly stop and absorb impact kinetic energy, and protect the safety of personnel.
Detailed Description
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the invention is disclosed herein.
Test example 1
The embodiment provides a helmet made of a composite material, which comprises a helmet body, a helmet body and a helmet body, wherein the helmet body comprises a composite fiber layer and a polymer layer which are sequentially laminated from outside to inside; the composite fiber layer is formed by sequentially laminating two layers of ultra-high molecular weight polyethylene fiber and aramid fiber mixed prepreg and one layer of carbon fiber prepreg. Specifically, the stacking sequence is that the ultra-high molecular weight polyethylene fiber and aramid fiber hybrid prepreg, the ultra-high molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg are stacked, and the thickness of a composite fiber layer formed by stacking is 1.8 mm.
Furthermore, the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg comprises 70% by weight of orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric and 30% by weight of unsaturated polyester, wherein the unsaturated polyester with the content of 30% can completely ensure that the unsaturated polyester is immersed in the fiber fabric, so that the material forms higher interlayer bonding force in the hot pressing process, the impact resistance of the material can be better improved, and the weight of the material can be reduced. In this example, the areal density of the cross UHMWPE and aramid woven fabric was 430g/m 2 The warp yarns are aramid yarns with the linear density of 1000tex, the weft yarns are ultra-high molecular weight polyethylene yarns with the linear density of 1000tex, and the fiber structure stability is better through an orthogonal weaving mode, so that the fiber bundles are not easy to separate and slide in the external impact process; and a high specific strength and specific modulus, so that the weight of the equipment can be effectively reduced under the condition of equal or higher protective effectiveness. Preferably, the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric is twisted in the Z direction, is woven by adopting double-filament doubling and is twisted in the Z direction, so that the tensile strength of the warps and the wefts is improved, the warps and the wefts are tightly combined, the aim of improving the puncture resistance and the cutting resistance of the fabric is fulfilled, the breaking force value of the fiber bundles can be effectively improved, and the aim of improving the protective performance of the helmet is fulfilled. The unsaturated polyester is thermosetting resin, and an adhesive is transferred to the surfaces of the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric by a hot melt transfer method. Specifically, the steps of the hot melt transfer method are as follows:
a. preparing an adhesive film: spraying the unsaturated polyester mixed in proportion on release paper, wherein the spraying surface density is 40g/m 2 ，
b. Transferring an adhesive film: and (3) attaching the adhesive film to the surfaces of the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric, pressurizing by 1.5 +/-0.1 MPa, heating by 80 +/-3 ℃ through a hot rolling cylinder, and immersing the adhesive film into the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric to form the ultrahigh molecular weight polyethylene fiber and aramid fiber mixed woven prepreg. The hot melting transfer method can ensure the density uniformity of the unsaturated polyester in unit area and the quality consistency of the composite fiber layer in the processing process.
It should be noted that, for the helmet with higher specification, other embodiments may use the fiber layer structure of the present embodiment as a base unit, and the number of the base units may be increased to achieve higher specification. The sandwich structure that this embodiment adopted the ultra high molecular weight polyethylene fiber and aramid fiber and the carbon fiber on outer complex fiber layer to constitute has matched the rigidity and the toughness requirement on complex fiber layer well, can realize high-efficient protection, can keep helmet integrality again in high strength strikes, and simultaneously, the weatherability on complex fiber layer is splendid, and environmental suitability is strong, and the performance decay that environmental stress leads to reduces.
Further, the area density of the carbon fiber prepreg is 700g/m 2 The carbon fiber prepreg with large area density has the characteristics of high modulus and high strength, is favorable for reducing structural collapse caused by external impact, can improve the structural strength of the helmet, and ensures the structural stability of the helmet. In this embodiment, the carbon fiber prepreg is composed of a left oblique twill carbon fiber machine-made cloth and epoxy resin. Specifically, in the weaving process of the left oblique twill carbon fiber woven fabric, the fiber bundles are not twisted, and the epoxy resin is immersed in the carbon fiber woven fabric through a hot-melt transfer method.
Further, the polymer layer is made of a modified polymer material and has a thickness of 2.2 mm. The modified polymer material comprises the following components in percentage by weight: the high-performance composite material comprises, by mass, 50 parts of acrylonitrile-butadiene-styrene copolymer, 30 parts of polycarbonate, 66-20 parts of nylon, 10 parts of polyformaldehyde, 8 parts of polyborosiloxane, 8 parts of maleic anhydride, 1.5 parts of a processing aid, 0.5 part of an antioxidant, 0.5 part of dicumyl peroxide and 0.2 part of paraffin oil. The embodiment organically combines the polymer layer on the composite fiber layer through injection molding, toughens, strengthens, improves bending, stretching and impact strength performance through the modified polymer material of the polymer layer, and simultaneously has the effect of performance synergic step with the composite fiber layer, namely, the composite fiber layer can play a role in skeleton and protection for the polymer layer on the basis of the superior performance of the composite fiber layer, so that the polymer layer can not generate fragmentation when being subjected to strong impact and cutting, and the polymer layer synergistically promotes the impact blocking and absorbing capacity of the composite fiber layer, thereby achieving the purpose of integrally promoting the protective performance and weather resistance of the helmet.
The manufacturing process of the helmet comprises the steps of firstly preparing the polymer layer by using a modified polymer material for later use, carrying out hot-press forming on the composite fiber layer by using a hot-press metal module, then placing the formed composite fiber layer in an injection mold, and carrying out injection molding processing on the polymer layer so as to enable the polymer layer to be placed on the composite fiber layer to form the helmet body with an integral structure.
First, a method for preparing a modified polymeric material, comprising the steps of:
s01: drying the acrylonitrile-butadiene-styrene copolymer;
s02: weighing 50 parts by mass of acrylonitrile-butadiene-styrene copolymer, 8 parts by mass of maleic anhydride, 0.5 part by mass of dicumyl peroxide and 0.2 part by mass of liquid paraffin oil, uniformly mixing, and then extruding and granulating in an extruder with a graft screw to obtain the compound A. Wherein the temperature of each section of the screw cylinder of the extruder is respectively 155 ℃, 180 ℃, 210 ℃ and 165 ℃ (head), the vacuum degree of the impurity removal section is 0.12MPa, and the rotating speed of the screw is 68 r/min.
S03: weighing 30 parts by mass of polycarbonate, 20 parts by mass of nylon 66 and 10 parts by mass of polyformaldehyde, putting the materials into a high-speed mixer at the temperature of 80 +/-3 ℃, carrying out high-speed mixing on the raw materials, carrying out extrusion granulation in a double-screw extruder, and drying the granules in an oven at the temperature of 80 +/-5 ℃ for 3 hours after the extrusion granulation is finished to obtain a compound B. Wherein the temperatures of all sections of a screw cylinder of the double-screw extruder are respectively 55 ℃, 130 ℃, 150 ℃, 190 ℃, 205 ℃, 210 ℃, 218 ℃ and 230 ℃, the vacuum degree of an impurity removal section is 0.12MPa, and the rotating speed of a screw is 68 r/min.
S04: weighing 8 parts by mass of polyborosiloxane, dispersing in deionized water to form a suspension, adjusting the pH to 9 by using a NaOH solution, adding a processing aid in a specified mass part while stirring, and performing ultrasonic oscillation for 1h at normal temperature; and (3) settling for 10min at 3000r/min in a centrifugal machine, washing the obtained filter cake with water, drying at 100 ℃, grinding, and sieving by a 300-mesh sieve to obtain the compound C.
S05: and drying the prepared compound A, the compound B and the compound C in a dryer at 90 +/-5 ℃ for 4 hours, weighing 0.5 part by weight of antioxidant, putting the antioxidant into a high-speed mixer together, stirring for 10min, and extruding and granulating the materials used for mixing in a co-rotating double-screw extruder to obtain the modified polymer material. Wherein the temperature of each section of the double-screw extruder is 160-180 ℃, the head temperature is 175 ℃, and the screw rotating speed is 80 r/min.
Secondly, the specific manufacturing process of the helmet comprises the following steps:
s10: respectively cutting ultra-high molecular weight polyethylene fiber, aramid fiber mixed prepreg and carbon fiber prepreg into oval cut pieces with the length of the long axis being 600mm and the length of the short axis being 500mm, and using the cut pieces for topological fitting of the head structure of personnel; and cuts with the length of 150mm at intervals of 90 degrees, so that the cut pieces can be spread on the curved surface mould of the helmet without folds.
S20: and laying the cut two layers of the mixed prepreg of the ultra-high molecular weight polyethylene fibers and the aramid fibers and the layer of the carbon fiber prepreg on a metal hot-pressing male die for forming the helmet body layer by layer. Wherein the incisions of the next layer are rotated by 15 deg. with respect to the incisions of the previous layer during the laying process, so as to avoid overlap of the incisions between adjacent layers.
S30: putting down the metal hot-pressing female die, closing the die, carrying out hot pressing at the hot pressing temperature of 135 +/-3 ℃, the hot pressing time of 28min and the hot pressing pressure of 18 +/-0.5 MPa, and opening the die and deflating twice at the 3 rd minute and the 8 th minute of pressing, wherein the time lasts for 20s each time.
S40: and opening the mold after hot pressing is finished, taking out the formed composite fiber layer, cutting off burrs, and polishing the inner surface of the formed composite fiber layer by using 100-mesh abrasive paper. The composite fiber layer with the rough surface is more beneficial to the combination of the polymer layer and the composite fiber layer, and meanwhile, the composite fiber layer can be firmly adhered to an injection mold.
S50: and (3) uniformly coating epoxy resin on the outer surface of the composite fiber layer, sticking the epoxy resin in a female die of an injection mold, and closing the mold after the epoxy resin is completely coated. The composite fiber layer is coated with epoxy resin which is a thermosetting material, and can be quickly separated from an injection mold after thermoforming.
S60: setting the process conditions of the injection molding machine: the helmet body has the structure that the first area is 220 ℃, the second area to the fourth area is 225 ℃, the fifth area to the seventh area is 215 ℃, the machine head is 233 ℃, the screw rotating speed is 180r/min, the injection molding temperature is 246 ℃, and the injection molding pressure is 125MPa, the modified polymer material which is prepared in advance is injected into an injection mold through an injection molding machine to form a polymer layer, and the polymer layer and the composite fiber layer are combined to form an integral structure, so that the helmet body with the structure of the outer composite fiber layer and the inner polymer layer is completed. The polymer layer is positioned on the inner layer, and the polymer layer can wrap the edge of the composite fiber layer through pressure injection molding, so that the bonding force of the polymer layer and the composite fiber layer is enhanced.
S70: and taking out the helmet body after injection molding, correcting overflowing materials, and cleaning the surface to obtain a finished helmet.
Test example 2
The embodiment provides a helmet made of a composite material, which comprises a helmet body, a helmet body and a helmet body, wherein the helmet body comprises a composite fiber layer and a polymer layer which are sequentially laminated from outside to inside; the composite fiber layer is formed by sequentially laminating two layers of ultra-high molecular weight polyethylene fiber and aramid fiber mixed prepreg and one layer of carbon fiber prepreg. Specifically, the stacking sequence is that the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg, the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg are stacked, and the thickness of the composite fiber layer formed by stacking is 1.7 mm.
Further, the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg is composed of 72% by weight of orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric and 28% by weight of unsaturated polyester. In this embodiment, the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabricThe surface density is 410g/m 2 The warp yarns are aramid yarns with the linear density of 1000tex, and the weft yarns are ultra-high molecular weight polyethylene yarns with the linear density of 1000 tex. Preferably, the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric is twisted in the Z direction, is woven by adopting double-filament doubling and is twisted in the Z direction, so that the tensile strength of the warps and the wefts is improved, the warps and the wefts are tightly combined, the aim of improving the puncture resistance and the cutting resistance of the fabric is fulfilled, the breaking force value of the fiber bundles can be effectively improved, and the aim of improving the protective performance of the helmet is fulfilled. The unsaturated polyester is thermosetting resin, and an adhesive is transferred to the surfaces of the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric by a hot melt transfer method. Specifically, the steps of the hot melt transfer method are as follows:
a. preparing an adhesive film: spraying the unsaturated polyester mixed in proportion on release paper, wherein the spraying surface density is 42g/m 2 ，
b. Transferring an adhesive film: and (3) attaching the adhesive film to the surfaces of the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric, pressurizing by 1.5 +/-0.1 MPa, heating by 80 +/-3 ℃ through a hot rolling cylinder, and immersing the adhesive film into the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric to form the ultrahigh molecular weight polyethylene fiber and aramid fiber mixed woven prepreg.
Further, the surface density of the carbon fiber prepreg is 720g/m 2 . In this embodiment, the carbon fiber prepreg is composed of a left oblique twill carbon fiber machine-made cloth and epoxy resin. Specifically, in the weaving process of the left oblique twill carbon fiber woven fabric, the fiber bundles are not twisted, and the epoxy resin is immersed in the carbon fiber woven fabric through a hot-melting transfer method.
Further, the polymer layer is made of a modified polymer material and has a thickness of 2.3 mm. The modified polymer material comprises the following components in percentage by weight: 55 parts of acrylonitrile-butadiene-styrene copolymer, 35 parts of polycarbonate, 66-25 parts of nylon, 15 parts of polyformaldehyde, 10 parts of polyborosiloxane, 18 parts of maleic anhydride, 2 parts of processing aid, 0.6 part of antioxidant, 0.6 part of dicumyl peroxide and 0.3 part of paraffin oil. This embodiment combines polymer layer injection moulding organic together on the composite fiber layer, the modified polymer material through polymer layer toughens, the reinforcing, improve the bending, tensile, the impact strength performance, combine to play the effect of performance cooperation step with the composite fiber layer simultaneously, composite fiber layer can play the effect of skeleton and protection again to polymer layer on its advantage performance's basis promptly, make polymer layer when receiving strong impact and cutting, can not produce the fracture, and polymer layer promotes composite fiber layer's impact separation and absorbing capacity again in coordination, reach the protective properties and the weatherability of whole promotion helmet.
Test example 3
The embodiment provides a helmet made of a composite material, which comprises a helmet body, a helmet body and a helmet body, wherein the helmet body comprises a composite fiber layer and a polymer layer which are sequentially laminated from outside to inside; the composite fiber layer is formed by sequentially laminating two layers of ultra-high molecular weight polyethylene fiber and aramid fiber mixed prepreg and one layer of carbon fiber prepreg. Specifically, the stacking sequence is that the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg, the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg are stacked, and the thickness of the composite fiber layer formed by stacking is 1.9 mm.
Further, the ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg is composed of 68% by mass of orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric and 32% by mass of unsaturated polyester. In this example, the areal density of the cross UHMWPE and aramid woven fabric was 450g/m 2 The warp yarns are aramid yarns with the linear density of 1000tex, and the weft yarns are ultra-high molecular weight polyethylene yarns with the linear density of 1000 tex. Preferably, the orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric is twisted in the Z direction, is woven by adopting double-filament doubling and is twisted in the Z direction, so that the tensile strength of the warps and the wefts is improved, the warps and the wefts are tightly combined, the aim of improving the puncture resistance and the cutting resistance of the fabric is fulfilled, the breaking force value of the fiber bundles can be effectively improved, and the aim of improving the protective performance of the helmet is fulfilled. The unsaturated polyester is thermosetting resin, and the adhesive is transferred to the orthogonal phase by a hot melt transfer methodThe surface of the ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric. Specifically, the hot melt transfer method comprises the following steps:
a. preparing an adhesive film: spraying the unsaturated polyester mixed in proportion on release paper, wherein the spraying surface density is 38g/m 2 ，
b. Transferring an adhesive film: and (3) attaching the adhesive film to the surfaces of the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric, pressurizing by 1.5 +/-0.1 MPa, heating by 80 +/-3 ℃ through a hot rolling cylinder, and immersing the adhesive film into the orthogonal ultrahigh molecular weight polyethylene fiber and aramid fiber woven fabric to form the ultrahigh molecular weight polyethylene fiber and aramid fiber mixed woven prepreg.
Further, the surface density of the carbon fiber prepreg is 680g/m 2 . In this embodiment, the carbon fiber prepreg is composed of a left oblique twill carbon fiber machine-made cloth and epoxy resin. Specifically, in the weaving process of the left oblique twill carbon fiber woven fabric, the fiber bundles are not twisted, and the epoxy resin is immersed in the carbon fiber woven fabric through a hot-melt transfer method.
Further, the polymer layer is made of a modified polymer material and has a thickness of 2.1 mm. The modified polymer material comprises the following components in percentage by weight: the high-performance composite material comprises, by mass, 45 parts of acrylonitrile-butadiene-styrene copolymer, 25 parts of polycarbonate, 66-15 parts of nylon, 5 parts of polyformaldehyde, 6 parts of polyborosiloxane, 5 parts of maleic anhydride, 1 part of a processing aid, 0.4 part of an antioxidant, 0.4 part of dicumyl peroxide and 0.1 part of paraffin oil. The embodiment organically combines the polymer layer on the composite fiber layer through injection molding, toughens, strengthens, improves bending, stretching and impact strength performance through the modified polymer material of the polymer layer, and simultaneously has the effect of performance synergic step with the composite fiber layer, namely, the composite fiber layer can play a role in skeleton and protection for the polymer layer on the basis of the superior performance of the composite fiber layer, so that the polymer layer can not generate fragmentation when being subjected to strong impact and cutting, and the polymer layer synergistically promotes the impact blocking and absorbing capacity of the composite fiber layer, thereby achieving the purpose of integrally promoting the protective performance and weather resistance of the helmet.
Comparative example 1
The conventional helmet is made of a single polymer material, such as polycarbonate or nylon, by an injection molding process, and specific proportioning materials of common helmet products are required.
1. The penetration resistance of the helmet shell was examined for test example 1, test example 2, and test example 3 and comparative example 1. Wherein, according to the regulation required by GA294-2012 police antiriot helmet: at normal temperature (25 +/-5 ℃), 3kg of heavy steel cone with the height of 3.6m is used for puncturing the helmet shell by 106J energy, and the steel cone is qualified that the helmet shell is not punctured. Specific detection results are shown in table 1.
Table 1: test result of penetration resistance of helmet shell at normal temperature
Test example 1 Test example 2 Test example 3 Comparative example 1
Whether or not to penetrate Whether or not Whether or not Whether or not Is that
In order to further verify the penetration resistance of the helmet shell in a severe environment, the penetration resistance of the helmet shell in a low-temperature environment and a high-temperature environment is tested, and the specific test results are shown in table 2:
table 2: test result of penetration resistance of helmet shell at high and low temperatures
Figure BDA0003778631970000121
As can be seen from tables 1 and 2: compared with the existing helmet, the composite fiber layer formed by two layers of ultra-high molecular weight polyethylene fibers, aramid fiber prepreg and one layer of carbon fiber prepreg is molded by the hot pressing mold, the structure has high specific strength and specific modulus, and after being impacted by the outside, under the action of comprehensive superior properties such as high tensile strength, low elongation at break, high impact strength and the like, the impact force can be rapidly dispersed, the impact force is transferred to a large area from a small area, the impact kinetic energy is consumed, the impact force penetrating into the helmet is reduced, and the penetration of sharp instruments can be prevented. In addition, after the helmet is used for 4 hours under severe conditions of high temperature and low temperature, the helmet also has the characteristics of reducing the impact force penetrating into the helmet and preventing the penetration of sharp instruments.
2. The performance of the helmet shell for absorbing impact energy was examined for test example 1, test example 2, and test example 3 and comparative example 1. Wherein, according to the regulation required by GA294-2012 police antiriot helmet: when a 5kg weight drop hammer is used at normal temperature (25 +/-5 ℃), the height is 1.3m, the helmet shell can bear the impact of 63.7J energy, the force transmitted to the test head die during impact is less than 4.9KN, and the helmet shell is qualified. Specific detection results are shown in table 3.
Table 3: test result of performance of helmet shell for absorbing collision energy at normal temperature
Figure BDA0003778631970000131
In order to further verify the performance of the helmet shell in absorbing collision energy in a severe environment, the penetration resistance of the helmet shell in a low-temperature environment and a high-temperature environment is tested, and the specific test results are shown in table 4:
table 4: test result of collision energy absorption performance of helmet shell at high and low temperatures
Figure BDA0003778631970000132
Through a multi-round test, the helmet adopting the fiber prepreg further improves the structural performance and the impact resistance at low temperature due to the shrinkage of the molecular weight of the fiber; however, the low temperature of the helmet made of a single polymer material can cause the brittleness of the material to rise, and the material is very easy to crack after being impacted.
As can be seen from tables 1 and 2: the polymer layer is preferably of a different material than existing helmets, such as: the impact strength is obviously improved after the acrylonitrile-butadiene-styrene copolymer is added into the graft, and the polyborosiloxane is a non-Newtonian fluid substance, so that the impact resistance of the material can be improved, and the impact energy can be absorbed to a certain extent; through reasonable matching of respective performances, high bending strength, high tensile strength and high impact strength of the material are cooperatively realized, and the material has low-temperature brittleness, and the damaged surface of the material is not cracked and has good contractibility after toughening treatment. After the polymer layer is subjected to the external impact action of reducing kinetic energy and increasing the action area, a larger impact energy absorption margin is provided, the impact kinetic energy is quickly stopped and absorbed, and the safety of personnel is protected. In addition, after the embodiment of the invention is used for 4 hours under severe conditions of high and low temperature, the embodiment of the invention still has stronger performance of absorbing collision energy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A helmet made of composite materials comprises a helmet body and is characterized in that the helmet body comprises a composite fiber layer and a polymer layer which are sequentially laminated from outside to inside; the composite fiber layer subjected to hot press forming is placed in an injection mold, and the polymer layer is formed through injection molding, so that the polymer layer is placed on the composite fiber layer to form the helmet body in an integral structure;
the composite fiber layer is formed by sequentially laminating a preset number of layers of ultra-high molecular weight polyethylene fiber, aramid fiber hybrid prepreg and carbon fiber prepreg;
the polymer layer is made of a modified polymer material, and the content of each component of the modified polymer material is as follows: 45-55 parts of acrylonitrile-butadiene-styrene copolymer, 25-35 parts of polycarbonate, 66-15-25 parts of nylon, 5-15 parts of polyformaldehyde, 6-10 parts of polyborosiloxane, 5-10 parts of maleic anhydride, 1-2 parts of processing aid, 0.4-0.6 part of antioxidant, 0.4-0.6 part of dicumyl peroxide and 0.1-0.3 part of paraffin oil.
2. The helmet according to claim 1, wherein the hybrid prepreg of ultra-high molecular weight polyethylene fibers and aramid fibers is composed of an orthogonal ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric and unsaturated polyester.
3. The helmet according to claim 2, characterized in that the warp of the cross ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric is aramid yarn, the weft is ultra-high molecular weight polyethylene yarn, and the twisting is performed in the Z direction.
4. The helmet of claim 3, wherein the cross-ply UHMWPE and aramid woven fabric has an areal density of 410g/m 2 ～450g/m 2 。
5. The helmet according to claim 2, wherein the unsaturated polyester is a thermosetting resin, and the unsaturated polyester is transferred to the surface of the cross ultra-high molecular weight polyethylene fiber and aramid fiber woven fabric by a hot-melt transfer method.
6. The helmet according to claim 2, wherein the unsaturated resin is 28-32% by weight of the hybrid prepreg of the ultra-high molecular weight polyethylene fibers and the aramid fibers.
7. The helmet of claim 1, wherein the carbon fiber prepreg is comprised of a left diagonal carbon fiber woven cloth and an epoxy resin; in the weaving process of the left oblique twill carbon fiber woven fabric, the fiber bundles are not twisted, and the epoxy resin is immersed in the carbon fiber woven fabric through a hot melting transfer method.
8. A helmet according to claim 7, wherein the carbon fibre prepreg has an areal density of 680g/m 2 ～720g/m 2 。
9. A method of making a helmet according to any one of claims 1 to 8, comprising the steps of:
s10: respectively cutting the ultra-high molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg into cut pieces, and cutting cuts on the cut pieces at preset angles;
s20: laying the cut ultrahigh molecular weight polyethylene fiber and aramid fiber hybrid prepreg and the carbon fiber prepreg on a metal hot-pressing male die for forming the helmet body layer by layer according to a preset sequence;
s30: closing the dies for hot pressing, opening the dies for air release according to preset interval time in the pressing process, and continuously releasing air for a preset time length each time;
s40: opening the mold after hot pressing is finished, taking out the formed composite fiber layer, cutting off burrs, and polishing the inner surface of the formed composite fiber layer by using abrasive paper;
s50: uniformly coating epoxy resin on the outer surface of the composite fiber layer, pasting the composite fiber layer in a female die of an injection mold, and closing the mold after completion;
s60: and injecting a prepared modified polymer material into an injection mold through an injection molding machine to form a polymer layer, and combining the polymer layer and the composite fiber layer to form an integral structure so as to complete the helmet body with the structure of the outer composite fiber layer and the inner polymer layer.
10. A method for manufacturing a helmet according to claim 9, wherein the method for manufacturing the modified polymeric material comprises the steps of:
s01: drying the acrylonitrile-butadiene-styrene copolymer;
s02: weighing acrylonitrile-butadiene-styrene copolymer, maleic anhydride, dicumyl peroxide and liquid paraffin oil according to a preset mass part, uniformly mixing, and then extruding and granulating in an extruder with a graft screw to obtain a compound A;
s03: weighing polycarbonate, nylon 66 and polyformaldehyde according to preset mass parts, putting the polycarbonate, the nylon 66 and the polyformaldehyde into a high-speed mixer at the temperature of 80 +/-3 ℃ for high-speed mixing, extruding and granulating in a double-screw extruder, and drying the granules in an oven at the temperature of 80 +/-5 ℃ for 2-4 hours to obtain a compound B;
s04: weighing polyborosiloxane according to a preset mass part, dispersing in deionized water to form a suspension, adjusting the pH to 9 by using a NaOH solution, adding a processing aid according to a preset mass part while stirring, performing ultrasonic oscillation for 0.5-1.5 h at normal temperature, obtaining a filter cake in a centrifuge, washing the filter cake, drying, grinding and sieving to obtain a compound C;
s05: drying the compound A, the compound B and the compound C in a dryer at the temperature of 90 +/-5 ℃ for 3-5 h, weighing a preset mass part of antioxidant, putting the antioxidant into a high-speed mixer together, stirring uniformly, and extruding and granulating in a co-rotating double-screw extruder to obtain the modified polymer material.
CN202210923434.3A 2022-08-02 2022-08-02 Helmet made of composite material and preparation process thereof Pending CN115067612A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210923434.3A CN115067612A (en) 2022-08-02 2022-08-02 Helmet made of composite material and preparation process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210923434.3A CN115067612A (en) 2022-08-02 2022-08-02 Helmet made of composite material and preparation process thereof

Publications (1)

Publication Number Publication Date
CN115067612A true CN115067612A (en) 2022-09-20

Family

ID=83242310

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210923434.3A Pending CN115067612A (en) 2022-08-02 2022-08-02 Helmet made of composite material and preparation process thereof

Country Status (1)

Country Link
CN (1) CN115067612A (en)

Similar Documents

Publication Publication Date Title
EP2146597B1 (en) Method of producing a filament wound curved product and product obtained thereby
KR101436173B1 (en) Process for the manufacture of a shaped part and shaped part obtainable with said process
KR102638077B1 (en) High performance fiber composite sheet
CN103600536B (en) A kind of composite for bulletproof halmet and preparation method thereof
CN1469803A (en) Impact resistant rigid composite and method of manufacture
CN104197786B (en) A kind of carbon fibre composite armour and preparation method thereof
CN101629794A (en) Method for preparing bulletproof formed part
CN107289816B (en) Bulletproof helmet and preparation method thereof
KR101398748B1 (en) Anti-ballistic protective composite and Anti-ballistic protective helmet manufactured by using the same
TW200829740A (en) Process for the production of a monolayer composite article, the monolayer composite article and a ballistic-resistant article
CN109795132A (en) A kind of preparation method of bulletproof halmet
CN115067612A (en) Helmet made of composite material and preparation process thereof
KR102029382B1 (en) Composite material and method of manufacturing the same
CN107560501B (en) Aramid bulletproof helmet and preparation method thereof
KR102112831B1 (en) Aramid composite and helmet manufactured thereby
KR102327592B1 (en) Aramid composite and helmet manufactured thereby
JP2004346190A (en) Prepreg and fiber reinforced resin composite
EP3606982B1 (en) High performance fibers composite sheet
Perepelkin Polymer Fibre Composites, Basic Types, Principles of Manufacture, and Properties. Part 2. Fabrication and Properties of Polymer Composite Materials.
CN117774367A (en) Preparation method of polypropylene anti-dent material
CN117261290A (en) Braiding-reinforced waste clothing fusion composite board and molding process
KR910003993B1 (en) Frp comprex layer which is bulletproop
CN111511812A (en) Hybrid fabric of high performance polyethylene fibers
WO2018184821A1 (en) High performance fibers composite sheet
KR20160139453A (en) High tenacity aramid multi-axial composite for bullet proof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination