CN207140468U - A kind of layer flexible buffers sandwich material - Google Patents
A kind of layer flexible buffers sandwich material Download PDFInfo
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- CN207140468U CN207140468U CN201721122574.1U CN201721122574U CN207140468U CN 207140468 U CN207140468 U CN 207140468U CN 201721122574 U CN201721122574 U CN 201721122574U CN 207140468 U CN207140468 U CN 207140468U
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- structural support
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Abstract
The utility model discloses a kind of layer flexible to buffer sandwich material, including structural support layers and protective mulch；The structural support layers are made up of structural support layer main body and structural support layers top cover, using soft polyurethane foam structure of the one-step method by formation of foaming twice；Foaming forms structural support layer main body for the first time, and its inside has buffer area；The buffer area is arranged in the inside of structural support layers by several buffer cells by certain form mode；Filling shear thickening fluid in the buffer cell；Second of foaming forms structural support layers top cover, and structural support layers top cover combines to form structural support layers with structural support layers main body in foaming process；The protective mulch is the one or more of blend fabric obtained using natural fiber or synthetic fibers as raw material, and the upper and lower surface of structural support layers is placed on by way of hot pressing.The material has good protective buffering performance, also with it is light, comfortable, flexible the characteristics of.
Description
Technical field
Composite material for weaving field is the utility model is related to, specifically a kind of layer flexible buffering sandwich material.
Background technology
The development of science and technology improves the living standard of the mankind, and this also promotes people to propose that higher performance will to protective materials
Ask.Protective materials mainly includes at present：1. hard material, mainly high intensity high quality than metal (such as aluminium alloy, titanium magnesium close
Gold etc.) or high rolled alloy material.2. soft material, such as polyurethane foam material, high-performance fiber (such as Kevlar) fabric.3.
Nonmetallic composite, such protective materials carry out after-treatment based on high-performance fiber fabric, to fiber, such as applied
Shear thickening fluid processing is covered or impregnated, is dried after then removing surplus liquid by twin-roll machine, although being waited until in fabric face
Retain, but its content is relatively low all the time.
Shear thickening refers to that by its viscosity during shearing force quick violent and non-linear increased phenomenon is occurred for system,
Its cardinal principle be certain material when not sheared or impact force action, dispersed phase particles and decentralized medium are due to hydrogen bond action
Network structure is formed, is not interfere with each other between dispersed phase particles, when it is by shearing and impact force action, network structure solves therewith
Body, dispersed phase particles form Particle Cluster, reduce material flowability energy, and viscosity increases sharply, and reaches a species solid state, sometimes
It is discontinuous increase, and this process is reversible.Such material has great in terms of apparatus with shock absorbing, reduction impact injury
Meaning.
Soft polyurethane be foamed by polyisocyanates and polyalcohol in the presence of auxiliary agent form there is good resilience
The foamed plastics of performance, soft comfortable.In all polyurethane products, the dosage of soft polyurethane foam ranks first.Soft polyurethane foam
Density is low, feel and resilience are preferable, has of a relatively high fissipation factor, when by foreign impacts or effect of vibration, energy
Energy is effectively absorbed, weakens foreign impacts power, and itself has good recoverable force.Therefore it is widely used in traffic
In the defense of resistance to impact materials of many aspects such as transport, sports and daily life.
In summary, problems be present in currently available technology：
1st, soft polyurethane is limited by its volume, and impact resistance is limited.It must increase when ensureing certain buffering energy-absorbing
Add very thick layer of polyurethane, it is difficult to ensure that the size of padded coaming, and its shear tenacity is poor, easily causes tear failure；
2nd, shear thickening fluid is affected by gravity due to showing as flow-like body under normal condition, it is difficult to is fixed on for a long time
Protective materials long-term use is equally influenceed inside protective materials, and the problems such as fluid seepage.
3rd, shear thickening fluid has the effect of unique shear thickening, and conventional method is that fabric is soaked in into shear thickening
In fluid, but specifically used two be present：1. people can not wear in the state of wet；2. shear thickening is imitated in the state of dry
Fruit reduces, and is unable to reach protection effect.When shear thickening fluid is immersed on fabric, it is not embodied well in high speed impact
From liquid to the process of Solid State Transformation under effect, so it should be allowed in material on the premise of its actual mechanism of action is not influenceed
In store in liquid form.
Utility model content
In view of the shortcomings of the prior art, it is more to be to provide one kind for the technical scheme of the utility model solution the technical problem
Layer flexible buffer sandwich material.The material has good protective buffering performance, also with it is light, comfortable, flexible the characteristics of, energy
It is widely used in the athletic protective equipment of automotive trim, package lining and human body.
The technical scheme that the utility model solves the technical problem is to provide a kind of layer flexible buffering sandwich material,
It is characterized in that the material includes structural support layers and protective mulch；
The structural support layers are made up of structural support layer main body and structural support layers top cover, pass through two using one-step method
The soft polyurethane foam structure that secondary foaming is formed；Foaming forms structural support layer main body for the first time, and its inside has buffering area
Domain；The buffer area is arranged in the inside of structural support layers by several buffer cells by certain form mode；The buffering
Filling shear thickening fluid in unit；Foam for the second time and form structural support layers top cover, structural support layers top cover in foaming process
Structural support layers are combined to form with structural support layers main body；
The protective mulch is the blend fabric obtained using natural fiber or synthetic fibers as raw material, passes through the side of hot pressing
Formula is placed on the upper and lower surface of structural support layers.
Compared with prior art, the utility model beneficial effect is：
(1) material overcomes hard closely knit, the heavy and inflexible shortcoming of traditional defense material, light, soft, can be with
Fitted over for arbitrary surface and dysarthrasis position, ensure that joint part can be deformed flexibly, and provided good
Comfortableness and gas permeability, make it have the feasibility applied to physical protection material.
(2) shear thickening fluid is internally formed internal core in soft polyurethane according to certain space encapsulated by structures, changed
Become storage form of the conventional shear thickening fluid in protective materials, be changed into complete liquid from the attached form of dipping or coating
The form of body, the intact sealing of shear thickening fluid is not assembled not only, overcome existing coating protective materials shear thickening
Fluid content is low, is difficult to preserve for a long time, after drying the defects of DeGrain, more makees with reference to shear thickening fluid in high speed impact
Gu the used time flows-conversion characteristic and soft high elastic polyurethane bulk properties, it is set to be respectively provided with excellent suction in low, high speed impact effect
Can buffering effect.
(3) presence of both sides protective mulch, internal core shear tenacity is further lifted while having buffering energy-absorbing concurrently
And anti-sharp object tear ability, make it have excellent statics and conformal performance.
(4) after being impacted for non-destructive, fabric, polyurethane reply initial configuration, shear thickening stream under elastic reaction
Body goes back to fluid from solid-state, overcomes the irreversible defect of other protective materials after the impact action, can be anti-under the conditions of non-extreme
It is multiple to use, preferably increase the service life.
Brief description of the drawings
Fig. 1 is the material structure schematic diagram that the utility model layer flexible buffers sandwich material embodiment 1；
Fig. 2 is the material structure schematic diagram that the utility model layer flexible buffers sandwich material embodiment 2；
Fig. 3 is the material structure schematic diagram that the utility model layer flexible buffers sandwich material embodiment 3；
Fig. 4 is the material structure schematic diagram that the utility model layer flexible buffers sandwich material embodiment 4；(in figure：1st, delay
Rush unit；2nd, structural support layers；3rd, protective mulch；21st, structural support layer main body；22nd, structural support layers top cover)
Embodiment
Specific embodiment of the utility model is given below.Specific embodiment is only used for being further described this practicality newly
Type, the application scope of the claims is not limited.
The utility model provides a kind of layer flexible buffering sandwich material (referring to Fig. 1-4, abbreviation material), and its feature exists
Include structural support layers 2 and protective mulch 3 in the material；
The structural support layers 2 are made up of structural support layer main body 21 and structural support layers top cover 22, using one-step method
By the soft polyurethane foam structure for formation of foaming twice；Foaming forms structural support layer main body 21 for the first time, its internal tool
There is buffer area；The buffer area is arranged in structural support layers 2 by several buffer cells 1 by certain form mode
Portion；Foam for the second time and form structural support layers top cover 22, structural support layers top cover 22 and structural support layer main body in foaming process
21 combine to form structural support layers 2；Expansion density is 0.12g/cm2-0.2g/cm2；
The protective mulch 3 is the one or more of blend fabric obtained using natural fiber or synthetic fibers as raw material,
Protection structure supporting layer 2 is played, increases the effect of comfortableness, the upper and lower of structural support layers 2 is placed on by way of hot pressing
Two sides.
Filling shear thickening fluid in the buffer cell 1, section are rectangle, triangle, hexagon or circle, body
Product is 8-4000mm3；The volume of the buffer area accounts for the 12%-40% of whole material volume；When the section of buffer cell 1 is
Rectangle or it is circular when, buffer cell 1 is arranged in the inside of structural support layers 2 by array way, forms buffer area；When slow
When the section for rushing unit 1 is triangle or hexagon, buffer cell 1 is arranged in the inside of structural support layers 2, shape by split level style
Into buffer area；
The structural support layers 2 pass through two using one-step method in a particular mold by PPG and multicomponent isocyanate
What secondary foaming was formed, the technique of one-step method foaming uses prior art, and bibliography is Lou C W, Huang S Y, Huang C
H,et al.Effects of structure design on resilience and acoustic absorption
properties of porous flexible-foam based perforated composites[J].Fibers and
Polymers,2015,16(12):2652.
The shear thickening fluid is commercially available prod.Heat pressing process uses prior art.
The integral thickness of the material is 5mm-50mm.
Embodiment 1
Layer flexible buffers sandwich material：The volume of buffer area accounts for the 13% of whole material volume；Structural support layers 2
Specification is 350mm × 330mm × 30mm；Buffer cell 1 is rectangle, and size is 20mm × 20mm, depth 10mm, and buffering is single
Member 1 is at intervals of 10mm；Protective mulch 3 is made up of fabric, is placed in the upper and lower surface of structural support layers.The grain of nano silicon
Footpath is 12nm；Expansion density 0.18g/cm2, the integral thickness 30mm of material.
Embodiment 2
Layer flexible buffers sandwich material：The volume of buffer area accounts for the 15% of whole material volume；Structural support layers 2
Specification is 350mm × 330mm × 30mm；Buffer cell 1 is circle, and a diameter of 20mm, depth 10mm, buffer cell 1 are spaced
For 10mm；Protective mulch 3 is made up of fabric, is placed in the upper and lower surface of structural support layers.The particle diameter of nano silicon is
12nm；Expansion density 0.18g/cm2, the integral thickness 30mm of material.
Embodiment 3
Layer flexible buffers sandwich material：The volume of buffer area accounts for the 20% of whole material volume；Structural support layers 2
Specification is 350mm × 330mm × 30mm；Buffer cell 1 is triangle, length of side 15mm, depth 10mm, between buffer cell 1
It is divided into 10mm；Protective mulch 3 is made up of fabric, is placed in the upper and lower surface of structural support layers.The particle diameter of nano silicon is
12nm；Expansion density 0.18g/cm2, the integral thickness 30mm of material.
Embodiment 4
Layer flexible buffers sandwich material：The volume of buffer area accounts for the 15% of whole material volume；Structural support layers 2
Specification is 350mm × 330mm × 30mm；Buffer cell 1 is hexagon, length of side 5mm, depth 10mm, and buffer cell 1 is spaced
For 10mm；Protective mulch 3 is made up of fabric, is placed in the upper and lower surface of structural support layers.The particle diameter of nano silicon is
12nm；Expansion density 0.18g/cm2, the integral thickness 30mm of material.
The utility model does not address part and is applied to prior art.
Claims (5)
1. a kind of layer flexible buffers sandwich material, it is characterised in that the material includes structural support layers and protective mulch；
The structural support layers are made up of structural support layer main body and structural support layers top cover, using one-step method by sending out twice
Steep the soft polyurethane foam structure formed；Foaming forms structural support layer main body for the first time, and its inside has buffer area；Institute
State the inside that buffer area is arranged in structural support layers by several buffer cells by certain form mode；In the buffer cell
Fill shear thickening fluid；Foam for the second time and form structural support layers top cover, structural support layers top cover and structure in foaming process
Supporting layer main body combines to form structural support layers；
The protective mulch is the blend fabric obtained using natural fiber or synthetic fibers as raw material, will by way of hot pressing
It is placed in the upper and lower surface of structural support layers.
2. layer flexible according to claim 1 buffers sandwich material, it is characterised in that the integral thickness of material is 5mm-
50mm。
3. layer flexible according to claim 1 buffers sandwich material, it is characterised in that the expansion density of structural support layers
For 0.12g/cm2-0.2g/cm2。
4. layer flexible according to claim 1 buffers sandwich material, it is characterised in that the volume of buffer cell is 8-
4000mm3；The volume of the buffer area accounts for the 12%-40% of whole material volume.
5. layer flexible according to claim 1 buffers sandwich material, it is characterised in that the section of the buffer cell is
Rectangle, triangle, hexagon or circle；When the section of buffer cell is rectangle or is circular, buffer cell presses battle array
Row mode is arranged in the inside of structural support layers, forms buffer area；When the section of buffer cell is triangle or hexagon,
Buffer cell is arranged in the inside of structural support layers by split level style, forms buffer area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721122574.1U CN207140468U (en) | 2017-09-04 | 2017-09-04 | A kind of layer flexible buffers sandwich material |
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| CN201721122574.1U CN207140468U (en) | 2017-09-04 | 2017-09-04 | A kind of layer flexible buffers sandwich material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107415343A (en) * | 2017-09-04 | 2017-12-01 | 天津工业大学 | A kind of layer flexible buffering sandwich material and preparation method thereof |
| CN108922963A (en) * | 2018-07-24 | 2018-11-30 | 云谷（固安）科技有限公司 | Display screen and display device |
-
2017
- 2017-09-04 CN CN201721122574.1U patent/CN207140468U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107415343A (en) * | 2017-09-04 | 2017-12-01 | 天津工业大学 | A kind of layer flexible buffering sandwich material and preparation method thereof |
| CN107415343B (en) * | 2017-09-04 | 2023-03-31 | 天津工业大学 | Multilayer flexible buffering sandwich material and preparation method thereof |
| CN108922963A (en) * | 2018-07-24 | 2018-11-30 | 云谷（固安）科技有限公司 | Display screen and display device |
| CN108922963B (en) * | 2018-07-24 | 2022-07-15 | 云谷（固安）科技有限公司 | Display screen and display device |
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