CN108801054A - A kind of bullet proof composite plating and preparation method thereof - Google Patents

A kind of bullet proof composite plating and preparation method thereof Download PDF

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Publication number
CN108801054A
CN108801054A CN201810646661.XA CN201810646661A CN108801054A CN 108801054 A CN108801054 A CN 108801054A CN 201810646661 A CN201810646661 A CN 201810646661A CN 108801054 A CN108801054 A CN 108801054A
Authority
CN
China
Prior art keywords
layer
composite plating
proof composite
bullet proof
unit fibers
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
CN201810646661.XA
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Chinese (zh)
Inventor
徐永红
丁旭
陶锴
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.)
Jiangsu New Mstar Technology Ltd Bianca
Original Assignee
Jiangsu New Mstar Technology Ltd Bianca
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 Jiangsu New Mstar Technology Ltd Bianca filed Critical Jiangsu New Mstar Technology Ltd Bianca
Priority to CN201810646661.XA priority Critical patent/CN108801054A/en
Publication of CN108801054A publication Critical patent/CN108801054A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41HARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H1/00Personal protection gear
    • F41H1/02Armoured or projectile- or missile-resistant garments; Composite protection fabrics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/22Layered 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
    • B32B5/24Layered 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
    • B32B5/26Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41HARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00Armour; Armour plates
    • F41H5/02Plate construction
    • F41H5/04Plate construction composed of more than one layer
    • F41H5/0471Layered armour containing fibre- or fabric-reinforced layers
    • F41H5/0478Fibre- or fabric-reinforced layers in combination with plastics layers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41WEAPONS
    • F41HARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H5/00Armour; Armour plates
    • F41H5/06Shields
    • F41H5/08Shields for personal use, i.e. hand held shields

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention provides a kind of bullet proof composite plating and preparation method thereof, wherein bullet proof composite plating includes:Cellular board, nonwoven layer, several unit fibers layers and the articulamentum between unit fibers layer;Several unit fibers layers are stacked from top to bottom, adjacent unit fibers layer is mutually bonded by articulamentum, each unit fibrous layer passes through laminar manner compression moulding, any cell fibrous layer has several filaments unidirectionally arranged being mutually parallel, in two adjacent unit fibers layers, the filament of the filament and another unit fibers layer of one of unit fibers layer is arranged in a crossed manner, cellular board be compound in the unit fibers layer being stacked while on, nonwoven layer is compound on the another side of cellular board.The present invention has effectively absorbed the impact force generated when bullet impact, has reduced armour swayback, alleviated the discomfort thus brought by the way that cellular board is arranged.In addition, the present invention under the premise of meeting certain ballistic performance, also acts as the effect of loss of weight.

Description

A kind of bullet proof composite plating and preparation method thereof
Technical field
The present invention relates to shellproof technical field technical field more particularly to a kind of bullet proof composite platings and preparation method thereof.
Background technology
Armour can be applied in the ballistic resistant products such as bullet-proof vest, shield use as burster course.Existing armour exists During use, when it receives impact, due to huge recoil force effect, certain impact can be still generated to human body.Therefore, In view of the above-mentioned problems, it is necessary to propose further solution.
Invention content
The purpose of the present invention is to provide a kind of bullet proof composite platings and preparation method thereof, existing in the prior art to overcome It is insufficient.
For achieving the above object, the present invention provides a kind of bullet proof composite plating comprising:If cellular board, nonwoven layer, Dry unit fibers layer and the articulamentum between unit fibers layer;
Several unit fibers layers are stacked from top to bottom, and adjacent unit fibers layer is mutually bonded by articulamentum, Each unit fibrous layer has several fibres unidirectionally arranged being mutually parallel by laminar manner compression moulding, any cell fibrous layer Tie up silk, in adjacent two unit fibers layers, the fibre of the filament and another unit fibers layer of one of unit fibers layer Tie up silk it is arranged in a crossed manner, the cellular board be compound in by adhesive the unit fibers layer being stacked while on, institute Nonwoven layer is stated to be compound on the another side of the cellular board.
The improvement of bullet proof composite plating as the present invention, the unit fibers layer are polyethylene fiber layer or nonwoven phenolic aldehyde Layer of cloth, the articulamentum are adhesive articulamentum.
The improvement of bullet proof composite plating as the present invention, the cellular board are PP cellular boards.
For achieving the above object, the present invention provides a kind of production method of bullet proof composite plating comprising following steps:
S1, offer are attached with the unit fibers layer of viscose glue thereon, and placement is laminated in multilevel-cell fiber from top to bottom;
S2, the multilevel-cell fiber for placing stacking are sent into press die, and set temperature is heated to;
S3, multilevel-cell fiber laminated into type is cooled to room temperature;
S4, pass through adhesive fixed cellular plate in the one side of multilevel-cell fiber laminated into type;
S5, the face composite non woven layer of cloth in cellular board.
The improvement of the production method of bullet proof composite plating as the present invention, in the step S2, in the multilayer that stacking is placed Release film is placed above and below unit fibers respectively.
The improvement of the production method of bullet proof composite plating as the present invention, in the step S2, the set temperature is 120-135℃。
The improvement of the production method of bullet proof composite plating as the present invention in the step S2, passes through the side that multistage is laminated Formula carries out lamination treatment to multilevel-cell fiber.
The improvement of the production method of bullet proof composite plating as the present invention, in multistage lamination, one section of solidifying pressure is 6Mpa, Two sections of solidifying pressures are 10Mpa, and three sections of solidifying pressures are 16Mpa, and four sections of solidifying pressures are set as 16Mpa.
The improvement of the production method of bullet proof composite plating as the present invention, in multistage lamination, one section of hardening time is thermoelectricity Even test temperature is from room temperature to 90 DEG C, and two sections of hardening times are 90 DEG C and are warming up to 90-128 DEG C, and three sections of hardening times are that heat preservation is protected Pressure 3 hours, four sections of hardening times are to be cooled to room temperature the required time.
The improvement of the production method of bullet proof composite plating as the present invention, the cellular board are PP cellular boards.
Compared with prior art, the beneficial effects of the invention are as follows:The bullet proof composite plating of the present invention has by the way that cellular board is arranged The impact force generated when bullet impact is absorbed to effect, reduces armour swayback, alleviates the discomfort thus brought.This Outside, bullet proof composite plating of the invention also acts as the effect of loss of weight under the premise of meeting certain ballistic performance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments described in invention, for those of ordinary skill in the art, without creative efforts, Other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram of a layer structure of one specific implementation mode of bullet proof composite plating of the present invention;
Fig. 2 is the vertical view of the adjacent two unit fibers layers being stacked together.
Specific implementation mode
The present invention is described in detail for each embodiment shown in below in conjunction with the accompanying drawings, but it should explanation, these Embodiment is not limitation of the present invention, those of ordinary skill in the art according to function, method made by these embodiments, Or the equivalent transformation in structure or replacement, all belong to the scope of protection of the present invention within.
As shown in Figure 1, 2, bullet proof composite plating of the invention includes:Cellular board 1, nonwoven layer 2, several unit fibers layers 3 And the articulamentum between unit fibers layer 3.Wherein, the unit fibers layer 3 is polyethylene fiber layer or nonwoven phenol Aldehyde layer of cloth.The articulamentum is adhesive articulamentum.
Several unit fibers layers 3 are stacked from top to bottom, and adjacent unit fibers layer 3 is mutually glued by articulamentum It connects, each unit fibrous layer 3 has several unidirectional rows being mutually parallel by laminar manner compression moulding, any cell fibrous layer 3 The filament of cloth, in adjacent two unit fibers layers 3, the filament and another unit of one of unit fibers layer 3 are fine The filament for tieing up layer 3 is arranged in a crossed manner.Preferably, in two adjacent unit fibers layers 3, the filametntary angle of intersection is 90 °. So set, it makes the bullet proof composite plating of the present invention have preferable ballistic performance.
The cellular board 1 be compound in by adhesive the unit fibers layer 3 being stacked while on, the nothing Woven fabric layer 2 is compound on the another side of the cellular board 1.To by the way that cellular board 1 is arranged, effectively absorb bullet impact When the impact force that generates, reduce armour swayback, alleviate the discomfort thus brought.In addition, certain anti-meeting Under the premise of elastic energy, the effect of loss of weight is also acted as.Preferably, the cellular board 1 is PP cellular boards.
Based on bullet proof composite plating as described above, the present invention also provides a kind of production methods of bullet proof composite plating comprising Following steps:
S1, offer are attached with the unit fibers layer of viscose glue thereon, and placement is laminated in multilevel-cell fiber from top to bottom;
S2, the multilevel-cell fiber for placing stacking are sent into press die, and set temperature is heated to;
S3, multilevel-cell fiber laminated into type is cooled to room temperature;
S4, pass through adhesive fixed cellular plate in the one side of multilevel-cell fiber laminated into type;
S5, the face composite non woven layer of cloth in cellular board.
With reference to embodiment specifically, the production method of the bullet proof composite plating of the present invention is illustrated.
Embodiment 1
The polyethylene fiber layer for being attached with hot-setting adhesive thereon is provided, placement is laminated in multilaminar polyethylene fiber from top to bottom. The hot-setting adhesive is phenolic hot-setting adhesive.
Release film is placed respectively above and below the multilaminar polyethylene fiber that stacking is placed, and the surrounding of release film is led to Fluid sealant bonding is crossed, multilaminar polyethylene fiber is sent into mold, set temperature is heated to.The set temperature is 132 ℃。
Lamination treatment is carried out to multilaminar polyethylene fiber by way of four sections of laminations, wherein one section of solidifying pressure is 6Mpa, two sections of solidifying pressures are 10Mpa, and three sections of solidifying pressures are 16Mpa, and four sections of solidifying pressures are set as 16Mpa.When one section of solidification Between be thermocouple assay temperature from room temperature to 90 DEG C, two sections of hardening times are 90 DEG C and are warming up to 100 DEG C, and three sections of hardening times are to protect Warm pressurize 3 hours, four sections of hardening times are to be cooled to room temperature the required time.Multilaminar polyethylene fibrous layer laminated into type is cold But to room temperature.
PP cellular boards are fixed by hot-setting adhesive in the one side of multilaminar polyethylene fiber laminated into type, the one of PP cellular boards Nonwoven layer is fixed in face by hot-setting adhesive.
Embodiment 2
The nonwoven phenolic aldehyde layer of cloth for being attached with hot-setting adhesive thereon is provided, multilayer nonwoven phenolic aldehyde layer of cloth is laminated from top to bottom and is put It sets.The hot-setting adhesive is phenolic hot-setting adhesive.
Release film is placed respectively above and below the multilayer nonwoven phenolic aldehyde layer of cloth that stacking is placed, by the surrounding of release film By sealing glue sticking, multilayer nonwoven phenolic aldehyde layer of cloth is sent into mold, set temperature is heated to.The set temperature is 135℃。
Lamination treatment is carried out to multilayer nonwoven phenolic aldehyde layer of cloth by way of four sections of laminations, wherein one section of solidifying pressure is 6Mpa, two sections of solidifying pressures are 10Mpa, and three sections of solidifying pressures are 16Mpa, and four sections of solidifying pressures are set as 16Mpa.When one section of solidification Between be thermocouple assay temperature from room temperature to 90 DEG C, two sections of hardening times are 90 DEG C and are warming up to 128 DEG C, and three sections of hardening times are to protect Warm pressurize 3 hours, four sections of hardening times are to be cooled to room temperature the required time.Multilayer nonwoven phenolic aldehyde layer of cloth laminated into type is cold But to room temperature.
PP cellular boards are fixed by hot-setting adhesive in the one side of multilayer nonwoven phenolic aldehyde layer of cloth laminated into type, in PP cellular boards Nonwoven layer is fixed by hot-setting adhesive on one side.
In conclusion the bullet proof composite plating of the present invention is generated by the way that cellular board is arranged when having effectively absorbed bullet impact Impact force, reduce armour swayback, alleviate the discomfort thus brought.In addition, the bullet proof composite plating of the present invention exists Under the premise of meeting certain ballistic performance, the effect of loss of weight is also acted as.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (10)

1. a kind of bullet proof composite plating, which is characterized in that the bullet proof composite plating includes:Cellular board, nonwoven layer, several units are fine Tie up layer and the articulamentum between unit fibers layer;
Several unit fibers layers are stacked from top to bottom, and adjacent unit fibers layer is mutually bonded by articulamentum, each list First fibrous layer has several fibers unidirectionally arranged being mutually parallel by laminar manner compression moulding, any cell fibrous layer Thread, in adjacent two unit fibers layers, the fiber of the filament and another unit fibers layer of one of unit fibers layer Silk it is arranged in a crossed manner, the cellular board be compound in by adhesive the unit fibers layer being stacked while on, it is described Nonwoven layer is compound on the another side of the cellular board.
2. bullet proof composite plating according to claim 1, which is characterized in that the unit fibers layer be polyethylene fiber layer or Person's nonwoven phenolic aldehyde layer of cloth, the articulamentum are adhesive articulamentum.
3. bullet proof composite plating according to claim 1, which is characterized in that the cellular board is PP cellular boards.
4. a kind of production method of bullet proof composite plating, which is characterized in that the production method includes the following steps:
S1, offer are attached with the unit fibers layer of viscose glue thereon, and placement is laminated in multilevel-cell fiber from top to bottom;
S2, the multilevel-cell fiber for placing stacking are sent into press die, and set temperature is heated to;
S3, multilevel-cell fiber laminated into type is cooled to room temperature;
S4, pass through adhesive fixed cellular plate in the one side of multilevel-cell fiber laminated into type;
S5, the face composite non woven layer of cloth in cellular board.
5. the production method of bullet proof composite plating according to claim 4, which is characterized in that in the step S2, be laminated Release film is placed respectively above and below the multilevel-cell fiber of placement.
6. the production method of bullet proof composite plating according to claim 4, which is characterized in that described to set in the step S2 Constant temperature degree is 120-135 DEG C.
7. the production method of bullet proof composite plating according to claim 4, which is characterized in that in the step S2, by more The mode of section lamination carries out lamination treatment to multilevel-cell fiber.
8. the production method of bullet proof composite plating according to claim 7, which is characterized in that in multistage lamination, one section of solidification Pressure is 6Mpa, and two sections of solidifying pressures are 10Mpa, and three sections of solidifying pressures are 16Mpa, and four sections of solidifying pressures are set as 16Mpa.
9. the production method of bullet proof composite plating according to claim 8, which is characterized in that in multistage lamination, one section of solidification Time is thermocouple assay temperature from room temperature to 90 DEG C, and two sections of hardening times are 90 DEG C and are warming up to 90-128 DEG C, when three sections of solidifications Between for heat-insulation pressure keeping 3 hours, four sections of hardening times are to be cooled to room temperature the required time.
10. the production method of bullet proof composite plating according to claim 4, which is characterized in that the cellular board is PP honeycombs Plate.
CN201810646661.XA 2018-06-21 2018-06-21 A kind of bullet proof composite plating and preparation method thereof Pending CN108801054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810646661.XA CN108801054A (en) 2018-06-21 2018-06-21 A kind of bullet proof composite plating and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810646661.XA CN108801054A (en) 2018-06-21 2018-06-21 A kind of bullet proof composite plating and preparation method thereof

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Publication Number Publication Date
CN108801054A true CN108801054A (en) 2018-11-13

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101454634A (en) * 2006-03-30 2009-06-10 霍尼韦尔国际公司 Molded ballistic panel with enhanced structural performance
CN105066787A (en) * 2015-09-16 2015-11-18 成都丝迈尔科技有限公司 Light protection shield comprising graded distribution type aluminum honeycomb core layer
US20180098589A1 (en) * 2016-10-12 2018-04-12 Richard Diamond Impact Resistant Structures for Protective Garments
CN108151588A (en) * 2018-02-01 2018-06-12 山东中恒景新碳纤维科技发展有限公司 A kind of honeycomb barrier structure bulletproof flashboards and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101454634A (en) * 2006-03-30 2009-06-10 霍尼韦尔国际公司 Molded ballistic panel with enhanced structural performance
CN105066787A (en) * 2015-09-16 2015-11-18 成都丝迈尔科技有限公司 Light protection shield comprising graded distribution type aluminum honeycomb core layer
US20180098589A1 (en) * 2016-10-12 2018-04-12 Richard Diamond Impact Resistant Structures for Protective Garments
CN108151588A (en) * 2018-02-01 2018-06-12 山东中恒景新碳纤维科技发展有限公司 A kind of honeycomb barrier structure bulletproof flashboards and preparation method thereof

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