CN216700854U - Conductive foam - Google Patents

Abstract

The utility model discloses a conductive foam which comprises a foam body, wherein the foam body is sequentially provided with an adhesive layer, a damping layer, a flame-retardant layer and a heat-insulating layer from outside to inside, the side edges of the periphery of the foam body are provided with cambered surfaces, shaping strips are fixedly arranged on the cambered surfaces, and a conductive layer is arranged between the foam body and the heat-insulating layer. The utility model has the characteristics of shock absorption, flame retardance, heat insulation, environmental protection and the like, has better high conductivity and electromagnetic shielding effect, improves the reliability of the conductive foam, and has simple structure and convenient installation.

Description

Conductive foam

Technical Field

The utility model relates to the technical field of electromagnetic shielding, in particular to a conductive foam.

Background

The conductive foam is formed by wrapping conductive cloth on the flame-retardant sponge, and after a series of treatments, the conductive cloth has good surface conductivity and can be easily fixed on a device to be shielded by an adhesive tape. There are different cross-sectional shapes, mounting methods, UL grades and shielding materials available for selection.

The structure of the conductive foam used in the current market mainly comprises PU foam and conductive cloth coated around the foam, the conductive foam has good conductivity after a series of treatments, and then the conductive foam is fixed on a device to be shielded by using an adhesive tape to form the conductive foam with compression elasticity. However, the existing conductive foam often has poor adhesive force and is easy to fall off due to the use of common double-sided adhesive or common glue, and meanwhile, the outer surface of the existing conductive foam is only simply wrapped with one layer of conductive cloth, so that the shielding effect and the conductive performance of the existing conductive foam are poor, and in addition, the existing conductive foam is easy to cut wrong in size when being cut, so that waste is caused.

In view of the cotton not enough in all-round electrically conductive and anti electromagnetic interference of current electrically conductive bubble, need tailor suitable size simultaneously in the use scene, cause the waste of leftover bits, be unfavorable for the environmental protection, consequently need adjust the optimization in the aspect of the structure, propose more reasonable technical scheme, solve the technical problem who exists among the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of defects in the prior art, the utility model provides the conductive foam which has the advantages of good high conductivity and electromagnetic shielding effect, environmental protection, high temperature resistance, high chemical stability, high plasticity and the like.

The technical scheme adopted by the utility model for solving the technical problem is as follows: the utility model provides a conductive foam cotton, includes the cotton body of bubble, the cotton body of bubble is by outer adhesive layer, buffer layer, fire-retardant layer and the insulating layer of setting gradually to interior, is equipped with the cambered surface on the arris all around of the cotton body of bubble, and fixed mounting has the shaping strip on the cambered surface, is equipped with the conducting layer between the cotton body of bubble and the insulating layer.

Through above-mentioned technical scheme, set up the conducting layer and make the electrically conductive bubble cotton have better high conductivity and electromagnetic shield effect, improved the cotton reliable degree of electrically conductive bubble, add the shaping strip simultaneously and can change the cotton shape of bubble at will, improved the cotton scene of need according to using of current electrically conductive bubble and tailor, cause the waste.

Furthermore, the conducting layer is an aluminum foil, the aluminum foil is adhered to the peripheral surface of the foam body, an oxidation resistant layer covers the aluminum foil, and the oxidation resistant layer is fixedly attached to the heat insulation layer.

Through above-mentioned technical scheme, the aluminium foil is selected for use to the conducting layer, and the aluminium foil has high electric conductivity and better shielding nature, sets up the antioxidation coating simultaneously and can improve the cotton degree of reliability of electrically conductive bubble, is favorable to prolonging its life.

Furthermore, be equipped with a plurality of on the insulating layer and be the air vent that honeycomb structure arranged, the air vent sets up in the insulating layer along the axial, and insulating layer and fire-retardant layer fixed connection's one end is equipped with the wedge groove.

Through above-mentioned technical scheme, prevent to lead to the cotton electric conductive property decline of bubble because of external environment high temperature, be equipped with a plurality of honeycomb formula air vent on the insulating layer, be favorable to the cotton heat dissipation of electrically conductive bubble.

Furthermore, the flame-retardant layer is provided with a wedge-shaped key matched with the wedge-shaped groove, the flame-retardant layer is made of flame-retardant PU cotton, and the flame-retardant layer is connected with the shock-absorbing layer through an adhesive in an adhesive mode.

Through the technical scheme, the flame-retardant layer can effectively prevent the phenomenon that foam is inflammable and prevent a fire source from diffusing to the periphery, so that the reliability of the performance of products is ensured and the service life of the products is prolonged.

Furthermore, be equipped with the air bag in the shock attenuation layer, the air bag is filled in the shock attenuation layer, and the shock attenuation layer parcel is on the cotton body lateral surface of bubble.

Through above-mentioned technical scheme, the air bag in the shock attenuation layer can absorb and disperse external impact, has obtained good buffering protection effect.

Furthermore, the adhesive layer is arranged on the outer side of the shock absorption layer, one end of the adhesive layer is adhered to the shock absorption layer, and the other end of the adhesive layer is covered with a release layer.

Through above-mentioned technical scheme, set up the adhesive layer and be convenient for install the electrically conductive bubble cotton, be equipped with on the adhesive layer from the type layer, the adhesive layer is convenient with this structural mounting on the shielding ware to through from the type layer, prevent effectively that the dust from getting into.

Further, the one end that the cotton body of bubble is close to the insulating layer is equipped with a plurality of parallel arrangement's recess, and the correspondence is provided with in the recess and separates the magnetic stripe, separates the clearance intussuseption of magnetic stripe and recess and is filled with the conducting resin.

Through above-mentioned technical scheme, the electrically conductive bubble is cotton has set up and has separated the magnetic stripe, separates the magnetic stripe and has strengthened the cotton magnetism effect that separates of electrically conductive bubble, has protected shielding device and other parts.

Furthermore, the shaping strip is an elastic plastic adhesive tape, is bonded on the arc-shaped edge of the foam body, and can be bent according to requirements to change the shape and size of the foam body.

Through the technical scheme, the shaping strip can be folded according to the use requirement, does not have restorability, and can change the shape, thereby meeting the requirement that the foam is suitable for various places.

In conclusion, the beneficial effects of the utility model are as follows:

1. according to the utility model, the surface conductivity of the foam is enhanced by improving the structure of the foam; the aluminum foil conducting layer and the oxidation resistant layer are arranged on the foam, so that the problem that the existing conductive foam cannot conduct electricity and heat in all directions is solved, and the electromagnetic shielding effect and high conductivity are better.

2. The utility model also provides a damping layer, a heat insulation layer and a flame retardant layer, wherein the damping layer can effectively prevent the foam cotton from being damaged due to collision in the transportation or carrying process, the heat insulation layer broadcasts out the heat inside, and the flame retardant layer can effectively prevent the foam cotton from being burnt when open fire occurs outside. In addition, the shaping strips are arranged on the peripheral side edges of the foam, so that the shape and size of the foam body can be changed at will, and waste caused by cutting of the foam sliver is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present embodiment.

In the figure: 10. a foam body; 101. shaping strips; 20. magnetic isolation strips; 30. a conductive layer; 301. An anti-oxidation layer; 40. an adhesive layer; 401. a release layer; 50. a shock-absorbing layer; 501. an air bag; 60. a flame retardant layer; 601. a wedge key; 70. a thermal insulation layer; 701. a vent hole; 702. a wedge-shaped groove.

Detailed Description

In order that the present disclosure may be more readily and clearly understood, reference is now made to the following description taken in conjunction with the accompanying drawings.

It is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like as used herein are based on the orientations and positional relationships shown in the figures, are used merely to facilitate description of the utility model and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. "plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The applicable temperature range of the conductive foam is wide and is 40-150 ℃; meanwhile, the anti-friction anti-chip waterproof and dustproof material has the excellent functions of friction resistance, chip falling resistance, water resistance, dust prevention, buffering and shock absorption, is simple and convenient to use, is an ideal conductive and electromagnetic shielding material, can be suitable for various electronic products, can be widely applied to the fields of automobiles, medical treatment, buildings, external packaging, industry and the like besides the electronic products, and is suitable for large-scale popularization.

As shown in fig. 1, the conductive foam of the present invention includes a foam body 10, and an adhesive layer 40, a shock-absorbing layer 50, a flame-retardant layer 60 and a thermal insulation layer 70 are sequentially disposed outside the foam body 10 from outside to inside.

Specifically, be provided with conducting layer 30 between bubble cotton body 10 and insulating layer 70, conducting layer 30 sets up to the aluminium foil, the aluminium foil is pasted on the lateral wall all around of bubble cotton body 10, because the structural feature of aluminium foil itself, still have fine shielding effect when can have high conductivity, except can using the aluminium foil, under having the same effect, can also use the copper foil, perhaps cover one deck conductive cloth at bubble cotton body 10, and nickel plating, gilding or tin-plating on bubble cotton body 10, make the bubble cotton have good electrically conductive effect equally.

Specifically, the adhesive layer 40 of the cotton body 10 of bubble sets up in the bottom of the cotton body 10 of bubble, and the upper end of adhesive layer 40 is pasted on the cotton body 10 of bubble, and the lower pot head has from type layer 401, and adhesive layer 40 is cotton for pasting fixed electrically conductive bubble conveniently, and the viscose material is AB glue, and this kind is glued usually viscidity very strongly for electrically conductive bubble is difficult for droing, and the benefit of using adhesive layer 40 is: simple structure, simple to operate, the laminating nature is strong, except can using adhesive layer 40, can also use fix with screw or welded fastening.

The foam body 10 is usually wrapped with a layer of conductive cloth, and the present embodiment uses aluminum foil instead of conductive cloth, and the advantages of using aluminum foil are: the aluminum foil is lighter in weight, has good shielding performance while having better conductivity, the aluminum foil is covered with the oxidation resistant layer 301, the oxidation resistant layer 301 is made of aluminum oxide, the oxidation resistant layer 301 can play a role in protection, the conductive foam is prevented from being corroded, the reliability of the conductive foam is improved, and the service life of the conductive foam is prolonged.

It is specific, be equipped with the arc chamfer all around of the cotton body 10 of bubble, install design strip 101 on the arc chamfer, design strip 101 has the function of elastic qualitative, its outer plastic in surface, the inside filiform thing of wrapping up the iron wire of at least one or other materials, thereby only need fold design strip 101 through external force when using and change its shape, and then changed the cotton shape of electrically conductive bubble, be applicable to the occasion that uses various needs to warp, and be equipped with a plurality of parallel arrangement's recess in the upper end of the cotton body 10 of bubble, place magnetism isolating block 20 in parallel arrangement's the recess, magnetism isolating block 20 can have electromagnetic shielding's effect to a certain extent.

A heat insulation layer 70 and a flame retardant layer 60 are arranged between the foam body 10 and the shock absorption layer 50, and a plurality of vent holes 701 are formed in the heat insulation layer 70; the vent holes 701 are distributed on the heat insulation layer 70 in a honeycomb mode, a wedge-shaped groove 702 is formed in one end, connected with the flame retardant layer 60, of the heat insulation layer 70, the shape and the size of the wedge-shaped groove 702 are consistent with those of a wedge-shaped key 601 arranged on the flame retardant layer 60, and the heat insulation layer 70 and the flame retardant layer 60 are connected together in a wedge-shaped matching mode.

Specifically, the flame retardant layer 60 is formed by coating an environment-friendly water-based flame retardant coating. The fire-retardant layer 60's addition can effectively prevent the cotton phenomenon of easily burning of bubble to and prevent the source of a fire to spread all around, with reliability and the extension its life of guaranteeing product performance, production simple process is applicable to and promotes in batches, sets up insulating layer 70 in order to prevent that the external environment temperature from influencing the cotton body 10 of bubble when too high, leads to the cotton product yielding of bubble. The heat insulation layer 70 is provided with a plurality of vent holes 701 arranged in a honeycomb structure, so that heat dissipation is facilitated, and when heat is accumulated inside foam, the heat can be discharged outwards from the vent holes 701.

Specifically, the shock-absorbing layer 50 has excellent shock-proof and buffering effects; the material filled in the shock absorption layer 50 can be an air bag 501, and the air bag 501 is filled with air, so that external impact force can be absorbed and dispersed, and a good buffer protection effect is obtained. Under the same functional effect, the inflatable bag can be replaced by foam, and the foam also has the function of buffering and shock absorption.

The working principle of the utility model is as follows: when the conductive foam is used, the release layer 401 needs to be removed, and then the conductive foam can be directly adhered to an adhered object. The adhesive layer 40 is directly contacted with the pasted object, and the conductive adhesive fills the gap of the pasted object, so that dust and water are prevented from entering the pasted object and damaging the pasted object; the shock absorption layer 50 can provide a good shock absorption function, and damage caused by impact shock is reduced; insulating layer and fire-retardant layer can prevent when external environment temperature is too high, lead to cotton electric conductivity of electrically conductive bubble and shielding nature function to reduce, effectively with the cotton inside thermal giving off of electrically conductive bubble.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and any insubstantial changes and modifications made by those skilled in the art based on the present invention are also covered by the scope of the present invention.

Claims (8)

1. The utility model provides a conductive foam, includes foam body (10), its characterized in that: the foam body (10) is sequentially provided with an adhesive layer (40), a damping layer (50), a flame-retardant layer (60) and a heat-insulating layer (70) from outside to inside, arc surfaces are arranged on the lateral edges of the foam body (10), shaping strips (101) are fixedly mounted on the arc surfaces, and a conductive layer (30) is arranged between the foam body (10) and the heat-insulating layer (70).

2. The conductive foam of claim 1, wherein: the conducting layer (30) is an aluminum foil, the aluminum foil is adhered to the peripheral surface of the foam body (10), an oxidation resistant layer (301) covers the aluminum foil, and the oxidation resistant layer (301) is attached to the heat insulation layer (70).

3. The conductive foam of claim 2, wherein: the heat-insulating layer (70) is provided with a plurality of vent holes (701) which are arranged in a honeycomb structure, the vent holes (701) are axially arranged in the heat-insulating layer (70), and one end of the heat-insulating layer (70) fixedly connected with the flame-retardant layer (60) is provided with a wedge-shaped groove (702).

4. The conductive foam of claim 3, wherein: the flame-retardant layer (60) is provided with a wedge-shaped key (601) matched with the wedge-shaped groove (702), the flame-retardant layer (60) is made of flame-retardant PU cotton, and the flame-retardant layer (60) is bonded with the shock absorption layer (50) through an adhesive.

5. The conductive foam of claim 4, wherein: an inflatable bag (501) is arranged in the shock absorption layer (50), and the shock absorption layer (50) is wrapped on the outer side surface of the foam body (10).

6. The conductive foam of claim 5, wherein: the adhesive layer (40) is arranged on the outer side of the shock absorption layer (50), one end of the adhesive layer (40) is pasted on the shock absorption layer (50), and the other end of the adhesive layer is covered with a release layer (401).

7. The conductive foam of claim 1, wherein: one end of the foam body (10) close to the heat insulation layer (70) is provided with a plurality of parallel grooves, the grooves are correspondingly provided with magnetic separation strips (20), and conductive adhesive is filled in gaps between the magnetic separation strips (20) and the grooves.

8. The conductive foam of claim 1, wherein: the shaping strip (101) is an elastic plastic adhesive tape, the shaping strip (101) is bonded on the arc-shaped edge of the foam body (10), and the shape and the size of the foam body (10) can be changed by bending according to requirements.

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