CN207889281U - Composite elastic conductive plastic band - Google Patents
Composite elastic conductive plastic band Download PDFInfo
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- CN207889281U CN207889281U CN201820078271.2U CN201820078271U CN207889281U CN 207889281 U CN207889281 U CN 207889281U CN 201820078271 U CN201820078271 U CN 201820078271U CN 207889281 U CN207889281 U CN 207889281U
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- elastomeric cover
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- elastic matrix
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Abstract
The utility model provides composite elastic conductive plastic band, including：There is insulation characterisitic, the inside of elastic matrix layer to be embedded with conducting wire for elastic matrix layer, elastic matrix layer, and at least side of elastic matrix layer has polymer powder layer；First elastomeric cover is arranged in the side of elastic matrix layer；Second elastomeric cover is arranged in the other side of elastic matrix layer；First waterproof layer is arranged in the outside of the first elastomeric cover；Second waterproof layer is arranged in the outside of the second elastomeric cover；Hot melt adhesive layer, is arranged the contact surface between each layer in the first elastomeric cover, the second elastomeric cover, the first waterproof layer, the second waterproof layer and elastic matrix layer, and the fusing point of hot melt adhesive layer is more than the fusing point of polymer powder.The composite elastic conductive plastic band has good bending ability, saves space, can avoid elastic matrix layer conglutinate before making composite elastic conductive plastic band, and ensure that adhesive effect does not reduce.
Description
Technical field
The utility model is related to modified plastic rubber product scopes, in particular to composite elastic conductive plastic band.
Background technology
Conducting wire in the prior art is usually to cover one layer of electro-insulating rubber in the external of wire, for thinner metal
Silk, easily snaps off during use.Moreover, in some electronic products, it is often necessary to stranded conductor, existing cabling side
Formula is that multiply binds together, otherwise disorderly and unsystematic, but the stranded conductor banded together still occupies more space, is easy folding
It is disconnected.
Elastomer is a kind of novel high polymer material between rubber and resin, can not only replace partial rubber,
Plastics can also be made to be modified.The dual property of rubber and plastics and wide characteristic possessed by elastomer, are allowed in rubber
It is each that the everyday articles and sebific duct, adhesive tape, adhesive tape, offset plate, glue part and adhesive etc. such as manufacture rubber overshoes, adhesive plaster are widely used in industry
Kind industrial goods.Meanwhile elastomer can also replace rubber be largely used in the general thermoplastic resin such as PVC, PE, PP, PS even PU,
The modification of the engineering plastics such as PA, CA above, makes plastics industry brand-new situation also occur.
In the prior art, composite elastic conductive plastic band combines a variety of elastomer layers, each to give full play to
The characteristic of layer makes composite elastic conductive plastic band have excellent overall performance.But practical composite elastic conductive plastic band production
In the process, there are some technical problems, including：（1）For the ease of storing and transporting, composite elastic conductive plastic in the prior art
The raw material of each layer of band are rolled up on spool, and ectonexine closely forces together, inside and outside two layers of material that the time contacts with each other with regard to after
Material is easily sticked to form interlocking together, and conveying cylinder can be crushed in coherent two layers of the band of process of conveyer belt, influences
Product quality can not even use under serious situation；（2）When material hardness is big, elasticity is difficult to full existing elastic webbing
Sufficient demand, when material hardness is small, itself keeps force difference, is easily deformed, and direction holding capacity is poor, is needed in some application scenarios
Special holding meanss are set, cost is increased, it is complicated.
Invention content
In order to overcome the deficiencies of the prior art, the utility model provides composite elastic conductive plastic band, can play
The effect of conducting wire, compared with existing conducting wire, elasticity is more preferable, elastic base before capable of avoiding making composite elastic conductive plastic band
Body layer conglutinate, and ensure that adhesive effect does not reduce.
Specifically, its technical solution is as follows：
A kind of composite elastic conductive plastic band, including：
There is insulation characterisitic, the inside of the elastic matrix layer to be embedded with conducting wire for elastic matrix layer, the elastic matrix layer,
At least side of the elastic matrix layer has polymer powder layer；
First elastomeric cover is arranged in the side of the elastic matrix layer；
Second elastomeric cover is arranged in the other side of the elastic matrix layer；
First waterproof layer is arranged in the outside of first elastomeric cover；
Second waterproof layer is arranged in the outside of second elastomeric cover；
Hot melt adhesive layer, setting first elastomeric cover, second elastomeric cover, first waterproof layer,
The fusing point of contact surface in second waterproof layer and the elastic matrix layer between each layer, the hot melt adhesive layer is more than described gather
Close the fusing point of object powder.
In some preferred embodiments, the hardness of first elastomeric cover is less than the hard of the elastic matrix layer
Degree；
And/or the hardness of second elastomeric cover is less than the hardness of the elastic matrix layer.
In some preferred embodiments, the conducting wire is cable-like structure, and the quantity of the conducting wire is multiple, interval
It is distributed in the elastic matrix layer.
In some preferred embodiments, the thickness of the elastic matrix layer is 0.5-3mm.
In some preferred embodiments, the thickness of the polymer powder layer is 30-60um, the polymer powder
A diameter of 20-50um.
In some preferred embodiments, the thickness of first elastomeric cover is 0.8-6mm；
The thickness of second elastomeric cover is 0.8-6mm.
In some preferred embodiments, the thickness of the hot melt adhesive layer is 100-200um.
In some preferred embodiments, first elastomeric cover and/or second elastomeric cover is outer
Surface is provided with etch resistant layer.
In some preferred embodiments, first elastomeric cover and/or second elastomeric cover is outer
Surface is provided with wearing layer.
In some preferred embodiments, first elastomeric cover and/or second elastomeric cover is outer
Surface is provided with bright and clean surface layer.
The utility model at least has the advantages that：
According to composite elastic conductive plastic band provided by the utility model, including：Elastic matrix layer, elastic matrix layer have
The inside of insulation characterisitic, elastic matrix layer is embedded with conducting wire, and at least side of elastic matrix layer has polymer powder layer；First
Elastomeric cover is arranged in the side of elastic matrix layer；Second elastomeric cover is arranged in the other side of elastic matrix layer；The
One waterproof layer is arranged in the outside of the first elastomeric cover；Second waterproof layer is arranged in the outside of the second elastomeric cover；Heat
Melt layer is arranged in the first elastomeric cover, the second elastomeric cover, the first waterproof layer, the second waterproof layer and elastic matrix layer
In contact surface between each layer, the fusing point of hot melt adhesive layer is more than the fusing point of polymer powder.
In the utility model, compared with traditional conducting wire, the composite elastic conductive plastic band have good bending ability,
Save space.Since there is polymer powder layer, polymer powder can make adjacent elasticity for at least side of elastic matrix layer
There are many small gaps between base layer, adjacent elastic matrix layer conglutinate can be avoided.Moreover, because hot melt adhesive
The fusing point of layer is more than the fusing point of polymer powder, when making composite elastic conductive plastic band using elastic matrix layer, high temperature melting
The glue-line melted can melt polymer powder, so that polymer powder is mixed into glue-line and be integrally formed, avoid solid polymer powder
The cementability of hot melt adhesive layer is set to decline.Moreover, the composite elastic conductive plastic band also has good waterproof ability.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment cited below particularly, and
The appended attached drawing of cooperation, is described in detail below.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the positive sectional view of composite elastic conductive plastic band in the utility model embodiment 1；
Fig. 2 is the side sectional view of composite elastic conductive plastic band in the utility model embodiment 1；
Fig. 3 is the schematic diagram of elastic base layer in the utility model embodiment 1；
Fig. 4 is the schematic diagram of composite elastic conductive plastic band in the utility model embodiment 2.
Main element symbol description：
100- composite elastic conductive plastic bands；
1000- elastic matrix layers；
1100- conducting wires；
The first elastomeric covers of 2000-；
The second elastomeric covers of 3000-；
4000- hot melt adhesive layers；
5000- polymer powder layers；
The first waterproof layers of 7000-；
The second waterproof layers of 8000-.
9000- wearing layers；
Specific implementation mode
Hereinafter, the various embodiments of the utility model will be described more fully.The utility model can have various realities
Example is applied, and can adjust and change wherein.It should be understood, however, that：There is no limit the various embodiments of the utility model
In the intention of specific embodiment disclosed herein, but the utility model should be interpreted as covering falling into the various of the utility model
All adjustment, equivalent and/or alternative in the spirit and scope of embodiment.
Hereinafter, the term " comprising " that can be used in the various embodiments of the utility model or " may include " indicate institute
Disclosed function, operation or the presence of element, and the increase of one or more functions, operation or element is not limited.In addition,
As used in the various embodiments of the utility model, term " comprising ", " having " and its cognate are meant only to indicate specific
Feature, number, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude one or first
A number of other features, number, step, operation, the presence of the combination of element, component or aforementioned item or one or more spies of increase
Sign, number, step, the possibility of operation, the combination of element, component or aforementioned item.
In the various embodiments of the utility model, states "or" or " at least one of A or/and B " includes while arranging
Any combinations of the word gone out or all combinations.For example, statement " A or B " or " at least one of A or/and B " may include A, can
Including B or it may include A and B both.
The statement (" first ", " second " etc.) used in the various embodiments of the utility model can be modified various
Various constituent element in embodiment, but respective sets can not be limited into element.For example, presented above be not intended to limit the element
Sequence and/or importance.The purpose presented above for being only used for differentiating an element and other elements.For example, first uses
Family device and second user device indicate different user device, although the two is all user apparatus.For example, not departing from this practicality
In the case of the range of novel various embodiments, first element is referred to alternatively as second element, and similarly, second element also can quilt
Referred to as first element.
It should be noted that：In the present invention, unless otherwise specific regulation and definition, " installation ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection or being integrally connected；It can be with
It is mechanical connection, can also be electrical connection；Can be directly connected to, and it can be indirectly connected through an intermediary；Can be
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
In the present invention, those skilled in the art are it is to be appreciated that indicating position or position in text
The term of relationship is orientation based on ... shown in the drawings or position relationship, is merely for convenience of description the utility model and simplification is retouched
It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and behaviour
Make, therefore should not be understood as limiting the present invention.
The term used in the various embodiments of the utility model is used only for the purpose of describing specific embodiments and simultaneously
It is not intended to the various embodiments of limitation the utility model.As used herein, singulative is intended to also include plural form, unless
Context is expressly otherwise indicated.Unless otherwise defined, otherwise all terms used herein (including technical term and science
Term) there is contain identical with the various normally understood meanings of embodiment one skilled in the art of the utility model
Justice.The term (term such as limited in the dictionary generally used) be to be interpreted as have in the related technical field
The identical meaning of situational meaning and the meaning of Utopian meaning or too formal will be interpreted as having, unless at this
It is clearly defined in the various embodiments of utility model.
Embodiment 1
Also referring to Fig. 1, Fig. 2, a kind of composite elastic conductive plastic band 100, including elastic base are present embodiments provided
Body layer 1000, the first elastomeric cover 2000, the second elastomeric cover 3000, the first waterproof layer 7000, the second waterproof layer 8000
With hot melt adhesive layer 4000.
Wherein, elastic matrix layer 1000 refers to the elastic layer as matrix, is made of modified plastic rubber.Elastic matrix layer
1000 have insulation characterisitic, and the inside of elastic matrix layer 1000 is embedded with conducting wire 1100.Preferably, the material of elastic matrix layer 1000
Material includes styrene-isoprene-styrene block copolymer（SIS）, Styrene-Butadiene-Styrene Block Copolymer
（SBS）Or styrene-ethylene/butylene-styrene block copolymer（SEBS）.
Preferably, as shown in Fig. 2, conducting wire 1100 is cable-like structure, the quantity of conducting wire 1100 is multiple, is distributed in
In elastic matrix layer 1000.Compared with single metal wire constitutes conducting wire 1100, the conducting wire 1100 of cable-like structure bends ability more
By force.
In the present embodiment, at least side of elastic matrix layer 1000 has polymer powder layer 5000.Wherein, by polyolefin
Such as polyethylene or ethylene vinyl acetate（EVA）The polymer powder of composition is suitable as polymer powder, preferably with every
Weight per unit area is present in less than or equal to 1g/m 2 on elastic matrix layer 1000.To a certain extent, polymer powder
It is applied on at least side of elastic matrix layer 1000 before rolling and after being made.Before rolling, by by elastic base
Body layer 1000 vacuumizes or brushes, and the amount of the powder applied can be minimized degree.By the way that elastic matrix layer 1000 is taken out
Vacuum brushes, and especially eliminates the powder not being adhered directly on cohesive elastomeric base layer 1000, if there are several for powder
Layer, after the expansion with before lamination, to vacuumize or brush elastic matrix layer 1000 to reduce amount of powder be also possible.
Preferably, as shown in figure 3, the both sides up and down of elastic matrix layer 1000 all have polymer powder layer 5000.
Since at least side of elastic matrix layer 1000 has polymer powder layer 5000, polymer powder can make adjacent
Elastic matrix layer 1000 between have many small gaps, adjacent 1000 conglutinate of elastic matrix layer can be avoided.
In the present embodiment, the first elastomeric cover 2000 is arranged in the side of elastic matrix layer 1000, the first elasticity covering
The hardness of layer 2000 is less than the hardness of elastic matrix layer 1000.
In the present embodiment, the second elastomeric cover 3000 is arranged in the other side of elastic matrix layer 1000, and the second elasticity is covered
The hardness of cap rock 3000 is less than the hardness of elastic matrix layer 1000.
Preferably, the first elastomeric cover 2000 and the second elastomeric cover 3000 can use textile material, preferably fine
Tie up adhesive-bonded fabric or non-woven fiber material（Adhesive-bonded fabric）As covering material.Non-woven material can have such as 20-35g/m
2 per unit area weight unit.
In the present embodiment, the setting of hot melt adhesive layer 4000 is in the first elastomeric cover 2000, the second elastomeric cover 3000, the
The contact surface between contact surface in one waterproof layer 7000, the second waterproof layer 8000 and elastic matrix layer 1000 between each layer, heat
Melt layer 4000 is configured as playing the role of other layers of bonding after melted by heating.Preferably, the first waterproof layer 7000 and
Two waterproof layers, 8000 vinyl modified plastic cement, such as Styrene-Butadiene-Styrene Block Copolymer.
The fusing point of hot melt adhesive layer 4000 is more than the fusing point of polymer powder in the present embodiment.Due to melting for hot melt adhesive layer 4000
Point is more than the fusing point of polymer powder, when making composite elastic conductive plastic band 100 using elastic matrix layer 1000, high temperature melting
The glue-line melted can melt polymer powder, so that polymer powder is mixed into glue-line and be integrally formed, avoid solid polymer powder
The cementability of hot melt adhesive layer 4000 is set to decline.
In the case where typical tack temperature is 140 to 170 DEG C, powder is melted and is distributed in hot melt adhesive layer 4000.
Glued temperature should be selected according to hot melt adhesive and the fusion temperature of powder, in general be not limited to the range.Hot melt adhesive
The fusing point of layer 4000 is more than the fusing point of polymer powder, and the hot melt adhesive from SIS bases and SBS based polyalcohols is particularly suitable for.
Preferably, the thickness of elastic matrix layer 1000 is 0.5-3mm.
Preferably, the thickness of polymer powder layer 5000 is 30-60um.
Preferably, the thickness of the first elastomeric cover 2000 is 0.8-6mm.
Preferably, the thickness of the second elastomeric cover 3000 is 0.8-6mm.
Preferably, the thickness of hot melt adhesive layer 4000 is 100-200um.
Preferably, a diameter of 20-50um of polymer powder.
Embodiment 2
Referring to Fig. 4, present embodiments providing a kind of composite elastic conductive plastic band 100, the composite elastic conductive plastic
Band 1000 has good bending ability, saves space.There is polymer powder by at least side of elastic matrix layer 1000
Layer 5000, polymer powder can make have many small gaps between adjacent elastic matrix layer 1000, can avoid phase
Adjacent 1000 conglutinate of elastic matrix layer.Moreover, because the fusing point of hot melt adhesive layer 4000 is more than the fusing point of polymer powder, when
When making composite elastic conductive plastic band 100 using elastic matrix layer 1000, the glue-line of high-temperature fusion can melt polymer powder
End makes polymer powder be mixed into glue-line and is integrally formed, solid polymer powder is avoided to make the cementability of hot melt adhesive layer 4000
Decline.
Compared with Example 1, the main distinction of the present embodiment is：
In the present embodiment, the outer surface of the first elastomeric cover 2000 is provided with wearing layer 9000.Wherein, wearing layer can be with
Changed by polytetrafluoroethylene (PTFE) or other wear-resistant materials are made.
Since the outer surface of the first elastomeric cover 2000 is provided with wearing layer, it is impaired that friction can be resisted.
It should be noted that it is a kind of preferred that the outer surface of the first elastomeric cover 2000, which is provided with wearing layer 9000 only,.
In the present embodiment, can also only the outer surface of the first elastomeric cover 2000 and the second elastomeric cover 3000 be both provided with it is wear-resisting
Layer 9000.
Other feature in the present embodiment is same as Example 1, is no longer further discussed below.
Embodiment 3
A kind of composite elastic conductive plastic band 100 is present embodiments provided, at least side of elastic matrix layer 1000 is passed through
With polymer powder layer 5000, polymer powder can make have many small skies between adjacent elastic matrix layer 1000
Gap can avoid adjacent 1000 conglutinate of elastic matrix layer.Moreover, because the fusing point of hot melt adhesive layer 4000 is more than polymer
The fusing point of powder, when making composite elastic conductive plastic band 100 using elastic matrix layer 1000, the glue-line of high-temperature fusion can
Melt polymer powder, so that polymer powder is mixed into glue-line and be integrally formed, solid polymer powder is avoided to make hot melt adhesive layer
4000 cementability declines.
Compared with Example 1, the main distinction of the present embodiment is：
In the present embodiment, the outer surface of the first elastomeric cover 2000 is provided with etch resistant layer.Wherein, etch resistant layer can be with
It is made of modified materials of polytetrafluoroethyland.
Since the outer surface of the first elastomeric cover 2000 is provided with etch resistant layer, the environment such as humidity, acidity can be resisted
In the first elastomeric cover 2000 by fast erosion.
It should be noted that it is a kind of preferred that the outer surface of the first elastomeric cover 2000, which is provided with etch resistant layer only,.This
In embodiment, the outer surface of the second elastomeric cover 3000 can also be provided with etch resistant layer.
Other feature in the present embodiment is same as Example 1, is no longer further discussed below.
Embodiment 4
A kind of composite elastic conductive plastic band 100 is present embodiments provided, which has
Good bending ability saves space.There is polymer powder layer 5000, polymerization by at least side of elastic matrix layer 1000
Object powder can make have many small gaps between adjacent elastic matrix layer 1000, can avoid adjacent elastic matrix
1000 conglutinate of layer.Moreover, because the fusing point of hot melt adhesive layer 4000 is more than the fusing point of polymer powder, when utilizing elastic matrix
When layer 1000 makes composite elastic conductive plastic band 100, the glue-line of high-temperature fusion can melt polymer powder, make polymer powder
End is mixed into glue-line and is integrally formed, and the cementability that solid polymer powder makes hot melt adhesive layer 4000 is avoided to decline.
Compared with Example 1, the main distinction of the present embodiment is：
The outer surface of first elastomeric cover 2000 and/or the second elastomeric cover 3000 is provided with bright and clean surface layer（In figure
It is not shown）.Bright and clean surface layer refers to that the outer surface structure on surface layer is fine and close, good to the reflecting properties of light, has very high glossiness.By
The outer surface of first elastomeric cover 2000 and/or the second elastomeric cover 3000 is provided with bright and clean surface layer, can significantly carry
Rise user experience.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Flow is not necessarily implemented necessary to the utility model.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out respective change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the utility model serial number is for illustration only, does not represent the quality of implement scene.
Disclosed above is only several specific implementation scenes of the utility model, and still, the utility model is not limited to
This, the changes that any person skilled in the art can think of should all fall into the scope of protection of the utility model.
Claims (10)
1. a kind of composite elastic conductive plastic band, which is characterized in that including：
Elastic matrix layer, the elastic matrix layer have insulation characterisitic, and the inside of the elastic matrix layer is embedded with conducting wire, described
At least side of elastic matrix layer has polymer powder layer；
First elastomeric cover is arranged in the side of the elastic matrix layer；
Second elastomeric cover is arranged in the other side of the elastic matrix layer；
First waterproof layer is arranged in the outside of first elastomeric cover；
Second waterproof layer is arranged in the outside of second elastomeric cover；
Hot melt adhesive layer, setting is in first elastomeric cover, second elastomeric cover, first waterproof layer, described
The fusing point of contact surface in second waterproof layer and the elastic matrix layer between each layer, the hot melt adhesive layer is more than the polymer
The fusing point of powder.
2. composite elastic conductive plastic band according to claim 1, which is characterized in that first elastomeric cover it is hard
Hardness of the degree less than the elastic matrix layer；
And/or the hardness of second elastomeric cover is less than the hardness of the elastic matrix layer.
3. composite elastic conductive plastic band according to claim 1, which is characterized in that the conducting wire is cable-like structure,
The quantity of the conducting wire is multiple, is distributed in the elastic matrix layer.
4. composite elastic conductive plastic band according to claim 1, which is characterized in that the thickness of the elastic matrix layer is
0.5-3mm。
5. composite elastic conductive plastic band according to claim 1, which is characterized in that the thickness of the polymer powder layer
For 30-60um, a diameter of 20-50um of the polymer powder.
6. composite elastic conductive plastic band according to claim 1, which is characterized in that the thickness of first elastomeric cover
Degree is 0.8-6mm；
The thickness of second elastomeric cover is 0.8-6mm.
7. composite elastic conductive plastic band according to claim 1, which is characterized in that the thickness of the hot melt adhesive layer is
100-200um。
8. composite elastic conductive plastic band according to claim 1, which is characterized in that first elastomeric cover and/
Or the outer surface of second elastomeric cover is provided with etch resistant layer.
9. composite elastic conductive plastic band according to claim 1, which is characterized in that first elastomeric cover and/
Or the outer surface of second elastomeric cover is provided with wearing layer.
10. composite elastic conductive plastic band according to claim 1, which is characterized in that first elastomeric cover and/
Or the outer surface of second elastomeric cover is provided with bright and clean surface layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820078271.2U CN207889281U (en) | 2018-01-17 | 2018-01-17 | Composite elastic conductive plastic band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820078271.2U CN207889281U (en) | 2018-01-17 | 2018-01-17 | Composite elastic conductive plastic band |
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| Publication Number | Publication Date |
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| CN207889281U true CN207889281U (en) | 2018-09-21 |
Family
ID=63544475
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| CN201820078271.2U Active CN207889281U (en) | 2018-01-17 | 2018-01-17 | Composite elastic conductive plastic band |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110215027A (en) * | 2019-07-19 | 2019-09-10 | 深圳职业技术学院 | A kind of high strength composite umbrella cloth and preparation method thereof |
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2018
- 2018-01-17 CN CN201820078271.2U patent/CN207889281U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110215027A (en) * | 2019-07-19 | 2019-09-10 | 深圳职业技术学院 | A kind of high strength composite umbrella cloth and preparation method thereof |
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