CN109451717A - A kind of electromagnetic shielding dust-proof sheath and the preparation method and application thereof - Google Patents
A kind of electromagnetic shielding dust-proof sheath and the preparation method and application thereof Download PDFInfo
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- CN109451717A CN109451717A CN201811472287.2A CN201811472287A CN109451717A CN 109451717 A CN109451717 A CN 109451717A CN 201811472287 A CN201811472287 A CN 201811472287A CN 109451717 A CN109451717 A CN 109451717A
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- electromagnetic shielding
- proof sheath
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0043—Casings being flexible containers, e.g. pouch, pocket, bag
Abstract
The present invention provides a kind of electromagnetic shielding dust-proof sheaths and the preparation method and application thereof, belong to dust-proof sheath technical field.The electromagnetic shielding dust-proof sheath includes the soft middle layer of soft outer layer, screened film being successively bonded and soft internal layer.Outer layer and internal layer are made by raw rubber, and the raw material of the screened film of the soft middle layer of screened film includes gauze screen or ITO.The dust-proof sheath hardness is low, flexible big, has good electromagnetic shielding performance, service life is longer.Preparation method includes: to prepare raw rubber, is grown directly from seeds glue by the structure of outer layer and internal layer in mold internal pressure, to respectively obtain soft outer layer and soft internal layer；Screened film is placed in the centre of soft outer layer and soft internal layer, is vulcanized.This method process is simple, easy to operate.Resulting electromagnetic shielding dust-proof sheath is used to be used cooperatively with the selector of cockpit or brake plate, the electromagnetic exposure problem generated at the movable spans such as selector or brake plate due to electric discontinuous is can effectively avoid, ensures health of human body.
Description
Technical field
The invention belongs to dust-proof sheath technical fields, and in particular to a kind of electromagnetic shielding dust-proof sheath and preparation method thereof
With application.
Background technique
Currently, at the movable spans such as vehicle class especially selector, the brake plate of high functionality vehicle class weaponry cockpit,
It is easy to appear the electromagnetic exposure problem generated due to electric discontinuous.The existing dust-proof sheath electromagnetism at above-mentioned movable span
Shield effectiveness difference and service life it is short, not only seriously affect the health of operator, but also significantly improve use at
This.
Summary of the invention
An object of the present invention includes providing a kind of electromagnetic shielding dust-proof sheath, and the dust-proof sheath hardness is low, flexible big,
With good electromagnetic shielding performance, service life is longer.
The second object of the present invention includes providing a kind of preparation method of above-mentioned electromagnetic shielding dust-proof sheath, this method process
Simply, easy to operate.
The third object of the present invention includes providing a kind of application of above-mentioned electromagnetic shielding dust-proof sheath, such as can be used for
It is used cooperatively, is can effectively avoid at the movable spans such as selector or brake plate since electricity does not connect with the selector or brake plate of cockpit
Continuous and generation electromagnetic exposure problem, ensures health of human body.
The present invention solves its technical problem and adopts the following technical solutions to realize:
The embodiment of the present invention proposes a kind of electromagnetic shielding dust-proof sheath comprising what is be successively bonded from outside to inside is soft outer
Layer, the soft middle layer of screened film and soft internal layer.
Soft outer layer and soft internal layer are made by raw rubber, and according to parts by weight, the raw material of raw rubber includes 10-50 parts by weight
Rubber, the stearic acid of DTDM, 0.5-1 parts by weight of BIBP, 0.3-1.5 parts by weight of 0.1-1 parts by weight, 0.1-0.5 weight
The antioxidant D, the carbon black of 1-15 parts by weight and the radar wave absorbing agent of 40-80 parts by weight of part.
The raw material of the screened film of the soft middle layer of screened film includes gauze screen or ITO.
The invention also provides a kind of preparation methods of above-mentioned electromagnetic shielding dust-proof sheath, comprising the following steps:
First time mixing rubber；Then it is carried out jointly with BIBP, DTDM, stearic acid, antioxidant D and carbon black close for the second time
Refining, to obtain broken-down rubber；Broken-down rubber and absorbent are subjected to third time mixing jointly, to obtain raw rubber.
Grow directly from seeds glue by the structure of soft outer layer and soft internal layer in mold internal pressure, to respectively obtain soft outer layer and soft interior
Layer.
Screened film is placed in the centre of soft outer layer and soft internal layer, is vulcanized, electromagnetic shielding dust-proof sheath is made.
The invention also provides a kind of applications of above-mentioned electromagnetic shielding dust-proof sheath, such as can be used for and cockpit
Selector or brake plate are used cooperatively.
The beneficial effect of electromagnetic shielding dust-proof sheath and the preparation method and application thereof includes: in the embodiment of the present invention
The electromagnetic shielding dust-proof sheath hardness that present pre-ferred embodiments provide is low, flexible big, has good electromagnetic screen
Performance is covered, service life is longer.Preparation method process is simple, easy to operate.It is used for and the selector of cockpit or braking
Plate is used cooperatively, and can effectively avoid at the movable spans such as selector or brake plate since electric electromagnetic exposure that is discontinuous and generating is asked
Topic ensures health of human body.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the electromagnetic shielding dust-proof sheath that the embodiment of the present application 1 provides.
Icon: 10- is electromagnetically shielded dust-proof sheath；The soft outer layer of 11-；The soft middle layer of 13- screened film；The soft internal layer of 15-；
The first stepped part of 21-；25- second step ladder；26- changeover portion；28- movable span.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it should be noted that the orientation or position of the instructions such as term " on ", "lower", "inner", "outside"
Set relationship be based on the orientation or positional relationship shown in the drawings or the invention product using when the orientation or position usually put
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term
" first ", " second " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In addition, the terms such as term " vertical " are not offered as requiring component absolute upright, but can be slightly tilted.As " hung down
Directly " only refer to that its direction is more vertical with respect to for "horizontal", be not indicate the structure have to it is completely vertical, but can
To be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It is specifically described below.
This application involves electromagnetic shielding dust-proof sheath include that the soft outer layer, the screened film that are successively bonded from outside to inside are soft
Middle layer and soft internal layer.Above-mentioned " fitting " can be regarded as being connected with each other or contact with each other.
Above-mentioned soft outer layer and soft internal layer can be made by raw rubber.According to parts by weight, the raw material of raw rubber for example can be with
The tristearin of DTDM, 0.5-1 parts by weight of BIBP, 0.3-1.5 parts by weight of rubber, 0.1-1 parts by weight including 10-50 parts by weight
The radar wave absorbing agent of acid, the antioxidant D of 0.1-0.5 parts by weight, the carbon black of 1-15 parts by weight and 40-80 parts by weight.Wherein,
BIBP is dual-tert-butyl cumyl peroxide, 4,4 '-dithio morpholine of DTDM.
Optionally, in the application, rubber may include MPU (modified polyurethane rubber), EPDM, neoprene and fourth
At least one of nitrile rubber.Such as can be made of simultaneously MPU and EPDM, it can also be simultaneously by EPDM, neoprene and fourth
Nitrile rubber composition, can be only made of nitrile rubber.
Preferably, rubber is collectively constituted by MPU and nitrile rubber in the application.In this case, the raw material of raw rubber includes 5-
The nitrile rubbers of MPU, 5-25 parts by weight of 25 parts by weight, BIBP, 0.5-1.2 parts by weight of 0.4-0.8 parts by weight DTDM,
The stearic acid of 0.6-0.8 parts by weight, the antioxidant D of 0.2-0.4 parts by weight, the carbon black of 5-10 parts by weight and 50-70 parts by weight
Radar wave absorbing agent.
Further, in some embodiments, the raw material of raw rubber includes MPU, 10-20 parts by weight of 10-20 parts by weight
Nitrile rubber, 0.5-0.7 parts by weight BIBP, 0.8-1 parts by weight DTDM, 0.65-0.75 parts by weight stearic acid,
The thunder of the antioxidant Ds (N- phenyl-β-naphthylamine salt) of 0.25-0.35 parts by weight, the carbon black of 7-8 parts by weight and 55-65 parts by weight
Up to wave absorbent.
Further, in some embodiments, the raw material of raw rubber includes the fourth of the MPU of 15 parts by weight, 15 parts by weight
Nitrile rubber, the BIBP of 0.6 parts by weight, the DTDM of 0.9 parts by weight, the stearic acid of 0.7 parts by weight, 0.3 parts by weight antioxidant D,
The radar wave absorbing agent of the carbon black of 7.5 parts by weight and 60 parts by weight.
It is worth noting that the raw material of the application raw rubber is not limited to the above-mentioned fit system enumerated, it specifically can be as needed,
It is freely combined in above-mentioned each ratio range.
In raw rubber raw material, BIBP is mainly used as vulcanizing agent, while may also function as thickening and adjusting the work of surface-active
With.DTDM is mainly used as vulcanizing agent and promotor.Stearic acid is mainly used as softening agent, and antioxidant D is mainly used for anti-heat ageing, charcoal
It is black to be mainly used as reinforcing agent.
Cooperated by above-mentioned each raw material, can make soft outer layer and soft internal layer that not only there is certain intensity, but also have
Biggish flexibility avoids the reciprocating motion due to movable part and cracks.
Inventors have found that the electromagnetic shielding of screen rubber, shielding tape or gauze screen for fixation hole encapsulates, can not solve
Certainly there are problems that the electromagnetic exposure of the hole of movable part.Screen rubber hardness is big, can not be bonded in movable part and cabin simultaneously
On, so that there are gaps between movable part and screen rubber, and can be in the use process of movable part, screen rubber can be sent out therewith
Raw friction, to generate abrasion and aging, or even is broken, so that gap is gradually increased, electromagnetic shielding failure；Shielding tape
Shield effectiveness is mainly determined by surface metal film, if sticking in the hole there are movable part, the metallic film in adhesive tape with
It is moved back and forth with movable part, damaged, poor reliability easily occurs；Gauze screen and shielding tape there is a problem of it is same, in movable part
Reciprocating motion in lack protection, easily occur damaged.
In consideration of it, middle layer is made of soft screened film in technical scheme by inventor, screened film is soft
The raw material of the screened film of middle layer includes gauze screen or ITO (tin indium oxide).This design makes dust cover to the loading of filler
It is required that it is low, sheath hardness is reduced, and can make to be electromagnetically shielded dust-proof sheath with stronger effectiveness, is located in addition
The soft outer layer and soft internal layer of middle layer two sides are flexible structures, to improve electromagnetic shielding dust-proof sheath on the whole
Pliability, will not due to movable part reciprocating motion and crack.Also, screened film is arranged in soft outer layer and soft internal layer
Centre can be such that screened film is protected in flexible high rubber, and screened film generation friction and aging, reliability is avoided substantially to increase
By force.
With can refer to, in the application, the soft middle layer of soft outer layer, screened film and soft internal layer are stepped.Tool
Body, by taking soft outer layer as an example comprising the first stepped part and second step ladder, the first stepped part and second step ladder or so pair
Claim setting, the step number of the first stepped part and second step ladder is equal and the size of ladder is also identical, the first stepped part it is most upper
The changeover portion of layer ladder is connected with the changeover portion of top layer's ladder of second step ladder." changeover portion " referred to herein can be regarded as
Form the traversing section in the traversing section and vertical section of ladder.It is worth noting that the electromagnetic shielding dust-proof sheath in the application is also
It can be set to other be in up-narrow and down-wide shape or structure, such as trapezoidal.
Further, the one end for being electromagnetically shielded dust-proof sheath offers movable span for being inserted into motion bar, electromagnetic shielding
The length of one end equipped with movable span of dust-proof sheath is less than the length for not setting one end of movable span.Namely movable span be opened in compared with
Narrow upper end.
It can make to be electromagnetically shielded the soft of dust-proof sheath by being arranged to the up-narrow and down-wide shape including ladder-like
The certain space of formation can be with the displacement of motion bar movement to provide in internal layer, and the deflection for reducing soft outer layer etc. is small, prolongs
The service life of long electromagnetic shielding dust-proof sheath.
In the application, the thickness of soft outer layer and soft internal layer all can be 0.5-1.5mm, such as 0.5mm, 0.6mm,
0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm etc..
The thickness of the soft middle layer of screened film can be 0.05-0.2mm, such as 0.05mm, 0.08mm, 0.1mm,
0.12mm, 0.15mm, 0.18mm or 0.2mm etc..
According to actual needs, the thickness of the soft middle layer of soft outer layer, screened film and soft internal layer can be in above range
Interior independent assortment.
Present invention also provides a kind of preparation methods of above-mentioned electromagnetic shielding dust-proof sheath, such as can comprise the following steps that
First time mixing rubber is (when rubber is MPU and nitrile rubber, i.e., by MPU and the common mixing of nitrile rubber)；So
Second of mixing is carried out jointly with BIBP, DTDM, stearic acid, antioxidant D and carbon black afterwards, to obtain broken-down rubber；By broken-down rubber
And absorbent carries out third time mixing jointly, to obtain raw rubber.
Grow directly from seeds glue by the structure of soft outer layer and soft internal layer in mold internal pressure, to respectively obtain soft outer layer and soft interior
Layer.
Screened film is placed in the centre of soft outer layer and soft internal layer, is vulcanized, electromagnetic shielding dust-proof sheath is made.
Mixing involved in above-mentioned is carried out in mixer.
It can refer to ground, first time mixing can be in the item of 68-72 DEG C (such as 68 DEG C, 69 DEG C, 70 DEG C, 71 DEG C or 72 DEG C etc.)
10-20min (such as 10min, 12min, 15min, 18min or 20min etc.) is carried out under part.According to specific needs, close for the first time
The temperature and time of refining can be freely combined within the above range.
Second of mixing be after the substance of first time mixing softens to glue completely in mixer put into BIBP,
DTDM, stearic acid, antioxidant D and carbon black carry out second of mixing jointly.Second of mixing can be in 78-82 DEG C (such as 78
DEG C, 79 DEG C, 80 DEG C, 81 DEG C or 82 DEG C etc.) under conditions of carry out 10-35min (such as 10min, 12min, 15min, 18min,
20min, 22min, 25min, 28min, 30min, 32min or 35min etc.).According to specific needs, the temperature of second of mixing and
Time can be freely combined within the above range.
Third time mixing can handle 20-30min (such as 20min, 22min, 25min, 28min under conditions of 100 DEG C
Or 30min etc.).According to specific needs, the temperature and time of third time mixing can be freely combined within the above range.
Further, the raw rubber generated after third time mixing is cut into required size, in 78-82 DEG C of (such as 78 DEG C, 79
DEG C, 80 DEG C, 81 DEG C or 82 DEG C etc.) under conditions of be put into specific mold, by compaction die, to obtain soft outer layer and soft
Internal layer.
Further, screened film is folded into required up-narrow and down-wide shape (such as ladder-like) and placed it in soft outer
Layer and soft internal layer among, be subsequently placed in sulfurizing mould, in 160-180 DEG C (such as 160 DEG C, 165 DEG C, 170 DEG C, 175 DEG C or
180 DEG C etc.) under conditions of vulcanizing treatment 20-40min (such as 20min, 25min, 30min, 35min or 40min etc.).
In addition, present invention also provides a kind of applications of above-mentioned electromagnetic shielding dust-proof sheath, such as it can be used for and drives
The selector or brake plate in cabin are used cooperatively namely it can be used as the electromagnetic shielding dust-proof sheath of selector or the electromagnetism of brake plate
Dustproof, shielding sheath, conscientiously eliminate high functionality vehicle class weaponry cockpit at the movable spans such as selector, brake plate due to
Electric discontinuous and generation electromagnetic exposure problem, the person of the electromagnetic compatibility characteristic and operator that effectively improve weapon system are strong
Health has wide application and market prospects in military and national defense field.
Embodiment 1
The nitrile rubber of the MPU of 5 parts by weight, 25 parts by weight are added in mixer, under conditions of 70 DEG C for the first time
Mixing 15min.After softening completely to glue by the BIBP of 1 parts by weight, the DTDM of 1.5 parts by weight, 0.5 parts by weight tristearin
Acid, the antioxidant D of 0.5 parts by weight, 15 parts by weight carbon additive put into mixer together, second under conditions of 80 DEG C
Mixing 25min, obtains broken-down rubber.Then the radar wave absorbing agent of 51 parts by weight is added in mixer, in 100 DEG C of environment
Raw rubber is made in middle third time mixing 30min.Raw rubber is put into specific mold in 80 DEG C of environment, compaction die obtains
To soft outer layer 11 and soft internal layer 15.It is placed among structure 1 and structure 3, is put into sulfurizing mould after screened film is folded,
Vulcanize 20min in 160 DEG C of environment, electromagnetic shielding dust-proof sheath 10 is made.
Resulting electromagnetic shielding dust-proof sheath 10 includes during the soft outer layer 11, the screened film that are successively bonded from outside to inside are soft
Interbed 13 and soft internal layer 15.The thickness of soft outer layer 11 and soft internal layer 15 is 1mm, the thickness of the soft middle layer 13 of screened film
Degree is 0.1mm.
Soft outer layer 11, soft internal layer 15 and the soft middle layer 13 of screened film are stepped.Please refer to Fig. 1, ladder
Shape structure includes the first stepped part 21 and second step ladder 25, and the first stepped part 21 is symmetrical set with second step ladder 25,
First stepped part 21 is equal with the step number of second step ladder 25 and the size of ladder is also identical, the top layer of the first stepped part 21
The changeover portion 26 of top layer's ladder of the changeover portion 26 and second step ladder 25 of ladder is connected.Movable span 28 is opened in relatively narrow upper
End.
Embodiment 2
The present embodiment the difference from embodiment 1 is that: the raw material of raw rubber includes the fourth of the MPU of 25 parts by weight, 25 parts by weight
Nitrile rubber, the BIBP of 0.1 parts by weight, the DTDM of 0.3 parts by weight, the stearic acid of 1 parts by weight, the antioxidant D of 0.1 parts by weight, 1 weight
Measure the carbon black of part and the radar wave absorbing agent of 40 parts by weight.
Embodiment 3
The present embodiment the difference from embodiment 1 is that: the raw material of raw rubber includes the butyronitrile of the MPU of 5 parts by weight, 5 parts by weight
Rubber, the BIBP of 0.4 parts by weight, the DTDM of 0.5 parts by weight, the stearic acid of 0.6 parts by weight, the antioxidant D of 0.2 parts by weight, 5 weights
Measure the carbon black of part and the radar wave absorbing agent of 50 parts by weight.
Embodiment 4
The present embodiment the difference from embodiment 1 is that: the raw material of raw rubber includes the fourth of the MPU of 25 parts by weight, 25 parts by weight
Nitrile rubber, the BIBP of 0.8 parts by weight, the DTDM of 1.2 parts by weight, the stearic acid of 0.8 parts by weight, 0.4 parts by weight antioxidant D,
The radar wave absorbing agent of the carbon black of 10 parts by weight and 70 parts by weight.
Embodiment 5
The present embodiment the difference from embodiment 1 is that: the raw material of raw rubber includes the fourth of the MPU of 10 parts by weight, 20 parts by weight
Nitrile rubber, the BIBP of 0.5 parts by weight, the DTDM of 1 parts by weight, the stearic acid of 0.65 parts by weight, the antioxidant D of 0.35 parts by weight, 7
The radar wave absorbing agent of the carbon black of parts by weight and 65 parts by weight.
Embodiment 6
The present embodiment the difference from embodiment 1 is that: the raw material of raw rubber includes the fourth of the MPU of 20 parts by weight, 10 parts by weight
Nitrile rubber, the BIBP of 0.7 parts by weight, the DTDM of 0.8 parts by weight, the stearic acid of 0.75 parts by weight, 0.25 parts by weight anti-aging agent
D, the carbon black of 8 parts by weight and the radar wave absorbing agent of 55 parts by weight.
Embodiment 7
The present embodiment the difference from embodiment 1 is that: the raw material of raw rubber includes the fourth of the MPU of 15 parts by weight, 15 parts by weight
Nitrile rubber, the BIBP of 0.6 parts by weight, the DTDM of 0.9 parts by weight, the stearic acid of 0.7 parts by weight, 0.3 parts by weight antioxidant D,
7.5 the radar wave absorbing agent of the carbon black of parts by weight and 60 parts by weight.
Embodiment 8
The present embodiment the difference from embodiment 1 is that: electromagnetic shielding dust-proof sheath in soft outer layer and soft internal layer thickness
Degree is 0.5mm, the soft middle layer of screened film with a thickness of 0.05mm.
Embodiment 9
The present embodiment the difference from embodiment 1 is that: electromagnetic shielding dust-proof sheath in soft outer layer and soft internal layer thickness
Degree is 1.5mm, the soft middle layer of screened film with a thickness of 0.2mm.
Embodiment 10
The present embodiment the difference from embodiment 1 is that: in electromagnetic shielding dust-proof sheath soft outer layer with a thickness of 1.2mm,
Soft internal layer with a thickness of 0.8mm, the soft middle layer of screened film with a thickness of 0.1mm.
Embodiment 11
The present embodiment the difference from embodiment 1 is that: first time mixing is that 20min is carried out under conditions of 68 DEG C；Second
Secondary mixing is that 35min is carried out under conditions of 78 DEG C；Third time mixing is that 29min is carried out under conditions of 100 DEG C；Compacting be in
It is carried out under conditions of 78 DEG C；Vulcanization is that 40min is carried out under conditions of 160 DEG C.
Embodiment 12
The present embodiment the difference from embodiment 1 is that: first time mixing is that 10min is carried out under conditions of 72 DEG C；Second
Secondary mixing is that 10min is carried out under conditions of 82 DEG C；Third time mixing is that 20min is carried out under conditions of 100 DEG C；Compacting be in
It is carried out under conditions of 82 DEG C；Vulcanization is that 20min is carried out under conditions of 180 DEG C.
Embodiment 13
The present embodiment the difference from embodiment 1 is that: first time mixing is that 15min is carried out under conditions of 70 DEG C；Second
Secondary mixing is that 25min is carried out under conditions of 80 DEG C；Third time mixing is that 25min is carried out under conditions of 100 DEG C；Compacting be in
It is carried out under conditions of 80.5 DEG C；Vulcanization is that 30min is carried out under conditions of 170 DEG C.
Test example
Shield by the method for " GJB6785-2009 " defined electromagnetic shielding dust-proof sheath resulting to embodiment 1-13
Performance test is covered, it is all as the result is shown to prepare resulting electromagnetic shielding dust-proof sheath in the equal energy of 30M~18GHz shielding properties
Up to -60dB.
By taking embodiment 1 as an example, be arranged control group 1, control group 1 the difference from embodiment 1 is that: with conductive filler filling with
Soft outer layer and the identical rubber base material of soft internal layer, thickness are identical as each layer overall thickness of embodiment 1.According to identical
Test method tests the shielding properties of the corresponding dust-proof sheath of control group 1, as the result is shown the dust-proof sheath shielding of control group 1
It can be only -40dB, thus illustrate to replace conductive filler in the prior art that can effectively improve electromagnetism with screened film in the application
The shielding properties of dustproof, shielding sheath.
In addition, the dust-proof sheath of embodiment 1 and control group 1 is matched (use condition with same selector respectively
It is identical), compare the fatigue behaviour resistant to bending of the two, the results show that implementing after the dust-proof sheath of control group 1 occurs damaged
The resulting electromagnetic shielding dust-proof sheath of example 1 is still intact.
Further, be arranged control group 2, control group 2 the difference from embodiment 1 is that: electromagnetic shielding dust-proof sheath present
Lower section cylindrical shape of same size, remaining condition are all the same.
According to the shielding properties of the identical test method test corresponding dust-proof sheath of control group 2, this is anti-as the result is shown
Dirt shield can also reach -60dB in 30M~18GHz shielding properties.
But the dust-proof sheath of embodiment 1 and control group 2 is matched into (use condition phase with same selector respectively
Together), compare the fatigue behaviour resistant to bending of the two, the results show that when the dust-proof sheath of control group 1 is in motion bar use process
Serious wear, and the resulting electromagnetic shielding dust-proof sheath of embodiment 1 is still intact.
To sum up, electromagnetic shielding dust-proof sheath hardness provided by the present application is low, flexible big, has good electromagnetic wave shielding
Can, service life is longer.Preparation method process is simple, easy to operate.It is used for matching with the selector of cockpit or brake plate
It closes and uses, can effectively avoid the electromagnetic exposure problem generated at the movable spans such as selector or brake plate due to electric discontinuous, protect
Hinder health of human body.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electromagnetic shielding dust-proof sheath, which is characterized in that the electromagnetic shielding dust-proof sheath includes successively pasting from outside to inside
Soft outer layer, the soft middle layer of screened film and the soft internal layer closed；
The soft outer layer and the soft internal layer are made by raw rubber, and according to parts by weight, the raw material of the raw rubber includes 10-
Stearic acid, the 0.1- of the rubber of 50 parts by weight, DTDM, 0.5-1 parts by weight of BIBP, 0.3-1.5 parts by weight of 0.1-1 parts by weight
The radar wave absorbing agent of the antioxidant D of 0.5 parts by weight, the carbon black of 1-15 parts by weight and 40-80 parts by weight；
The raw material of the screened film of the soft middle layer of screened film includes gauze screen or ITO.
2. electromagnetic shielding dust-proof sheath according to claim 1, which is characterized in that the rubber includes MPU, EPDM, chlorine
At least one of buna and nitrile rubber；
Preferably, the raw material of the raw rubber includes the nitrile rubber of the MPU and 5-25 parts by weight of 5-25 parts by weight.
3. electromagnetic shielding dust-proof sheath according to claim 1, which is characterized in that the soft outer layer, the screened film
Soft middle layer and the soft internal layer are stepped.
4. electromagnetic shielding dust-proof sheath according to claim 1, which is characterized in that the soft outer layer with a thickness of 0.5-
1.5mm and/or the soft middle layer of the screened film with a thickness of 0.05-0.2mm and/or the soft internal layer with a thickness of
0.5-1.5mm。
5. electromagnetic shielding dust-proof sheath according to claim 1, which is characterized in that the one of the electromagnetic shielding dust-proof sheath
End offers the movable span for being inserted into motion bar, the length of one end equipped with the movable span of the electromagnetic shielding dust-proof sheath
Degree is less than the length for not setting one end of the movable span.
6. a kind of preparation method of electromagnetic shielding dust-proof sheath as described in any one in claim 1-5, which is characterized in that including
Following steps:
Rubber described in first time mixing；Then with the BIBP, the DTDM, the stearic acid, the antioxidant D and described
Carbon black carries out second of mixing jointly, to obtain broken-down rubber；It is close that the broken-down rubber and the absorbent are carried out to third time jointly
Refining, to obtain raw rubber；
It is described soft to respectively obtain by the structure of the soft outer layer and the soft internal layer in being compacted the raw rubber in mold
Outer layer and soft internal layer；
The screened film is placed in the centre of the soft outer layer and the soft internal layer, is vulcanized, the electromagnetic shielding is made
Dust-proof sheath.
7. preparation method according to claim 6, which is characterized in that first time mixing be under conditions of 68-72 DEG C into
Row 10-20min；And/or second of mixing is that 10-35min is carried out under conditions of 78-82 DEG C；And/or third time mixing be in
20-30min is handled under conditions of 100 DEG C.
8. preparation method according to claim 6, which is characterized in that compacting is carried out under conditions of 78-82 DEG C.
9. preparation method according to claim 6, which is characterized in that vulcanization is to handle 20- under conditions of 160-180 DEG C
40min。
10. a kind of application of electromagnetic shielding dust-proof sheath as described in any one in claim 1-5, which is characterized in that the electricity
Magnetic screen dust-proof sheath is used cooperatively for the selector or brake plate with cockpit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811472287.2A CN109451717B (en) | 2018-12-03 | 2018-12-03 | Electromagnetic shielding dustproof sheath and preparation method and application thereof |
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| CN201811472287.2A CN109451717B (en) | 2018-12-03 | 2018-12-03 | Electromagnetic shielding dustproof sheath and preparation method and application thereof |
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| CN109451717A true CN109451717A (en) | 2019-03-08 |
| CN109451717B CN109451717B (en) | 2020-05-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752019A (en) * | 2008-12-16 | 2010-06-23 | 西南科技大学 | Production for radiation protection gloves |
| CN203536012U (en) * | 2013-09-29 | 2014-04-09 | 安徽华峰电缆集团有限公司 | Double-sheath antistatic tensile control cable for movement |
| CN103834073A (en) * | 2014-02-28 | 2014-06-04 | 宁国市正道橡塑零部件有限公司 | Butadiene-acrylonitrile rubber material and preparation method thereof |
| CN106213630A (en) * | 2016-07-27 | 2016-12-14 | 中国工程物理研究院材料研究所 | A kind of multilamellar radiation protection gloves and processing technology thereof |
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2018
- 2018-12-03 CN CN201811472287.2A patent/CN109451717B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752019A (en) * | 2008-12-16 | 2010-06-23 | 西南科技大学 | Production for radiation protection gloves |
| CN203536012U (en) * | 2013-09-29 | 2014-04-09 | 安徽华峰电缆集团有限公司 | Double-sheath antistatic tensile control cable for movement |
| CN103834073A (en) * | 2014-02-28 | 2014-06-04 | 宁国市正道橡塑零部件有限公司 | Butadiene-acrylonitrile rubber material and preparation method thereof |
| CN106213630A (en) * | 2016-07-27 | 2016-12-14 | 中国工程物理研究院材料研究所 | A kind of multilamellar radiation protection gloves and processing technology thereof |
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| CN109451717B (en) | 2020-05-29 |
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