CN108859324A - Insulate silica gel pad and preparation method thereof and equipment - Google Patents
Insulate silica gel pad and preparation method thereof and equipment Download PDFInfo
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- CN108859324A CN108859324A CN201810383249.3A CN201810383249A CN108859324A CN 108859324 A CN108859324 A CN 108859324A CN 201810383249 A CN201810383249 A CN 201810383249A CN 108859324 A CN108859324 A CN 108859324A
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- silica gel
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- free glass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/067—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of fibres or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/164—Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
A kind of insulation silica gel pad, the gasket is combined by upper heat-conducting glue layer, intermediate alkali-free glass fiber layer of cloth and lower heat-conducting glue layer, the upper and lower heat-conducting glue layer is combined by silicon rubber and boron nitride and auxiliary agent, its thickness is respectively 0.02~0.4 millimeter, the intermediate alkali-free glass fiber layer of cloth with a thickness of 0.01~0.2 millimeter.The invention also discloses the preparation methods and equipment of a kind of silica gel pad that insulate.Insulation silica gel pad of the invention passes through using boron nitride as main stuffing, and intermediate compound alkali-free glass fiber layer, the obtained insulation silica gel pad with a thickness of 0.1~0.5mm, it is when breakdown voltage is greater than 3KV, good heat conduction effect, radiating efficiency is high, and without adding a large amount of high thermal conductivity filler, organosilicon macromolecule structure is not destroyed, and keeps its machine-shaping convenient.Hot-forming by moulding press in addition, the present invention can directly prepare insulation silica gel pad by the double coating head apparatus for coating of two-part, device structure is simple, high production efficiency.
Description
【Technical field】
The present invention relates to a kind of insulation silica gel materials, high, easily molded more particularly to a kind of radiating efficiency, and can be used for electricity
Insulation silica gel pad of sub- equipment thermal interfacial material and preparation method thereof and equipment.
【Background technique】
With the development of electronic information technology, electronic equipment is increasingly miniaturized, and electronic equipment in use or
Heat can mostly or be less generated, extra heat cannot such as shed in time, then the properties of product of electronic equipment are not only influenced, but also
Its service life is also by serious threat.Insulate component part of the silica gel pad as electronic equipment, not only acts as insulation
Effect also requires have good heat dissipation effect.And existing insulation silica gel pad Heat Conduction Material is usually thermally conductive fill out with aluminium oxide
Material, when its thickness is less than 0.5 millimeter, and breakdown voltage is greater than 3KV, thermal coefficient will be generally less than 2W/m*K, be unable to satisfy electricity
The radiating requirements of sub- equipment.In order to realize high thermal conductivity effect, it is necessary to add a large amount of boron nitride high fever filler, and this heat conduction material
Material is very severe to the destruction of organosilicon macromolecule material structure, can not form.Therefore, it is high how to provide a kind of radiating efficiency, and
Easily molded insulation silica gel pad, so that it is can be used for electronic equipment thermal interfacial material just becomes a kind of objective demand.
【Summary of the invention】
Present invention seek to address that the above problem, and it is high, easily molded to provide a kind of radiating efficiency, and can be used for electronic equipment
The insulation silica gel pad of thermal interfacial material.
The present invention also provides a kind of preparation methods of silica gel pad that insulate.
The present invention also provides a kind of equipment for preparing insulation silica gel pad.
To achieve the purpose of the present invention, the present invention provides a kind of insulation silica gel pad, the gasket by upper heat-conducting glue layer, in
Between alkali-free glass fiber layer of cloth and lower heat-conducting glue layer be combined, the upper and lower heat-conducting glue layer is answered by silicon rubber and boron nitride and auxiliary agent
Close, thickness is respectively 0.02~0.4 millimeter, the intermediate alkali-free glass fiber layer of cloth with a thickness of 0.01~0.2 millimeter.
The upper and lower heat-conducting glue layer includes following component based on parts by weight：
The silicon rubber is in methyl vinyl silicone rubber, methyl phenyl silicone rubber, fluorine silicone rubber or dimethyl silicone rubber
One or more of combinations.
The weight ratio of the silicon rubber and boron nitride is less than or equal to 1:1, the boron nitride granularity is 0.01~100 micron,
Impurity content is lower than 0.1%.
The solvent is one of toluene, dimethylbenzene, ethyl acetate, lipid organic solvent or phenyl organic solvent or several
Kind combination, the coupling agent be one of silane coupling agent or titanate coupling agent or and combinations thereof, the organosilicon sulphur
Agent is the mixture of organic peroxide or containing hydrogen silicone oil and catalyst made from platonic, other described conduction powders are aluminium nitride, oxygen
Change one or more of aluminium, magnesia, zinc oxide, silicon nitride, silica or aluminium hydroxide mixture.
The present invention also provides a kind of preparation methods of silica gel pad that insulate, and this method comprises the following steps：
A, boron nitride and auxiliary agent are added after dissolving silicon rubber, stands 1~3 hour after mixing evenly, obtains heat conductive silica gel；
B, heat conductive silica gel is coated on release film by apparatus for coating, it is then that heat conductive silica gel and intermediate alkali-free glass is fine
It is compound to tie up cloth, being placed in temperature is to dry 3~8 minutes at 60~80 DEG C, then heat conductive silica gel is coated on alkali-free glass fiber cloth, is set
It is formed after being to be dried 3~8 minutes at 60~80 DEG C in temperature, obtains semi-finished product；
C, semi-finished product obtained in step b are cut into sheet material, then covers release film on surface, then in molding device
It is hot-forming, the insulation silica gel pad is obtained after tearing release film.
In step b and step c, the release film is polytetrafluoroethylfiberglass fiberglass-cloth, fluorine element PET release film or fluorine-containing release
Material.
The present invention also provides a kind of equipment for preparing insulation silica gel pad, which includes apparatus for coating and molding dress
It sets, the apparatus for coating is the double coating head apparatus for coating of two-part, is successively arranged the first unreeling machine, the first coating head, second
Unreeling machine, composite roll, the first drying equipment, the second coating head, the second drying equipment and fixed length cutting means, described first unreels
Machine unreels release film, and second unreeling machine unreels alkali-free glass fiber cloth, and first coating head, the second coating head are coated with thermal conductive silicon
Glue, and first coating head, the second unreeling machine and composite roll are respectively arranged on above release film, second coating head is set to nothing
Above alkali glass-fiber-fabric.
The molding device is tabular moulding press, is equipped with pedestal, hydraulic column and can heat the upper die head of pressurization, lower die
Head, described hydraulic column one end be fixed on pedestal, and the other end drives lower die head to move up and down, in the upper die head, lower die head
Contact jaw is respectively equipped with cache layer.
The upper die head, lower die head molding combined pressure be more than or equal to 10MPa by force.
Contribution of the invention is that the thermal interfacial material thermal coefficient for efficiently solving existing electronic equipment is low, can not
The problem of molding.Insulation silica gel pad of the invention is by using boron nitride as main stuffing, and intermediate compound alkali-free glass fiber layer, obtains
The insulation silica gel pad with a thickness of 0.1~0.5mm arrived, when breakdown voltage is greater than 3KV, good heat conduction effect, radiating efficiency
Height, and without adding a large amount of high thermal conductivity filler, organosilicon macromolecule structure is not destroyed, and machine-shaping is convenient.In addition, this hair
It is bright directly to prepare insulation silica gel pad, equipment hot-forming by moulding press by the double coating head apparatus for coating of two-part
Structure is simple, high production efficiency.
【Detailed description of the invention】
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the structural schematic diagram of apparatus for coating of the invention.
Fig. 3 is the structural schematic diagram of molding device of the invention.
【Specific embodiment】
Refering to fig. 1, insulation silica gel pad of the invention is by upper and lower layer heat conduction silicone 10A, 10B and intermediate alkali-free glass fiber
Layer of cloth 20 is combined by apparatus for coating 30 and molding device 40, wherein upper and lower layer heat conduction silicone 10A, 10B are by silicon rubber
Glue, boron nitride and auxiliary agent are combined, and the weight ratio of silicon rubber and boron nitride is less than or equal to 1:1, boron nitride granularity is 0.01
~100 microns, impurity content is lower than 0.1%, and auxiliary agent includes solvent, coupling agent, vulcanizing agent and other conduction powders, such as nitrogenizes
The mixture of one or more of aluminium, aluminium oxide, magnesia, zinc oxide, silicon nitride, silica or aluminium hydroxide is thick
Degree is 0.02~0.4 millimeter, intermediate alkali-free glass fiber layer of cloth 20 with a thickness of 0.01~0.2 millimeter, obtained insulation silica gel pad
Overall thickness be 0.1~0.5 millimeter.
The preparation method of the insulation silica gel pad is：First by organic silicon rubber dissolution in a solvent, after mixing evenly plus
Enter boron nitride and other conduction powders, vulcanizing agent and coupling agent, stands 1~3 hour after mixing evenly, obtain heat conductive silica gel.Again
The heat conductive silica gel being stirred is coated on release film by apparatus for coating 30, wherein the thickness of the heat conductive silica gel of coating passes through
Scraper control.Then heat conductive silica gel and intermediate alkali-free glass fiber cloth is compound, being placed in temperature is that 3~8 are dried at 60~80 DEG C
Minute, then heat conductive silica gel is coated on alkali-free glass fiber cloth, being placed in temperature is to form after drying 3~8 minutes at 60~80 DEG C,
Obtain semi-finished product.Semi-finished product are cut into sheet material, then surface cover release film, then in molding device 40 it is hot-forming,
Insulation silica gel pad is obtained after tearing release film.Wherein, release film is polytetrafluoroethylfiberglass fiberglass-cloth, fluorine element PET release film or contains
The separated type material of fluorine.
As shown in Fig. 2, apparatus for coating 30 is the double coating head apparatus for coating of two-part, be successively arranged the first unreeling machine 31,
First coating head 32, the second unreeling machine 33, composite roll 34, the first drying equipment 35, the second coating head 36, the second drying equipment 37
And fixed length cutting means 38, wherein the first unreeling machine 31 is for unreeling release film, and the second unreeling machine 33 is for unreeling alkali-free glass fiber
Cloth, the first coating head 32 are used to for heat conductive silica gel being coated on release film, and the second coating head 33 is for heat conductive silica gel to be coated on
On alkali-free glass fiber cloth, composite roll 34 is for compound by alkali-free glass fiber cloth and heat conductive silica gel, and the first coating head 32, the second unreeling machine
33 and composite roll 34 be respectively arranged on above release film, the second coating head is set to above alkali-free glass fiber cloth.First drying equipment 35 and
Second drying equipment 37 is oven, and fixed length cutting means 38 are cutting machine.Specific work process is：Release film is placed in first to put
On volume machine 31, alkali-free glass fiber is arranged on the second unreeling machine 33, starts the first unreeling machine 31, release film is made to be deployed in the first coating
Heat conductive silica gel is coated on release film, obtains lower heat-conducting glue layer 10B, restart second and put by first 32 lower section, the first coating head 32
Volume machine 33 keeps alkali-free glass fiber cloth compound through composite roll 34 and lower heat-conducting glue layer, intermediate alkali-free glass fiber layer 20 is obtained, after compound
Lower heat-conducting glue layer 10B and intermediate alkali-free glass fiber layer 20 are placed in the first drying equipment 35 that temperature is 60~80 DEG C and dry 3~8 points
Clock, then heat conductive silica gel is coated on alkali-free glass fiber cloth by the second coating head 36, obtains heat conduction silicone 10A, then lead by
Hot layer of silica gel 10A, intermediate alkali-free glass fiber layer 20 and lower heat-conducting glue layer 10B are placed in the second drying equipment 37 that temperature is 60~80 DEG C
Middle drying 3~8 minutes is finally cut into required length with fixed length cutting means 38 to get insulation silica gel pad semi-finished product are arrived.
As shown in figure 3, molding device 40 is molded for the hot-forming of silica gel pad semi-finished product that insulate for tabular
Machine.The moulding press 40 is equipped with pedestal 41, hydraulic column 42, upper die head 43 and lower die head 44, wherein one end of hydraulic column 42 is fixed on
On pedestal 41, the other end drives lower die head 44 to move up and down, and upper die head 43 and lower die head 44 can heat pressurization, and upper die head 43,
The molding combined pressure of lower die head 44 is more than or equal to by force 10MPa, is respectively equipped with cache layer in the contact jaw of upper die head 43 and lower die head 44
45, the insulation silica gel pad being placed between upper die head 43 and lower die head 44 can be made to be heated, be pressurized uniformly, ensure insulation silica gel pad
Thickness uniformly and heating conduction.When work, after insulation silica gel pad semi-finished product are covered upper one layer of release film, it is placed in upper die head
Between 43 and lower die head 44, the temperature and pressure of moulding press is set, keeps insulation silica gel pad semi-finished product hot-forming, then tear
The release film of upper and lower level to get to insulation silica gel pad.
Insulation silica gel pad obtained is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, wherein thick
Degree testing standard is ASTM D374, and breakdown voltage testing standard is ASTM D149, and Determination of conductive coefficients standard is ASTM
D5470, tensile strength testing standard are：ASTM D412.
The following example is that of the invention is explained further and being supplemented, and is not limited in any way to the present invention.
Embodiment 1
The methyl vinyl silicone rubber that weight is 5 kilograms is placed in 10 kilograms of xylene solvent and is stirred 2 hours, silicon is made
Rubber sufficiently dissolves, then 0.1 kilogram of silane coupling A -151 of addition, 12 kilograms of boron nitride, 2 kilograms of aluminium oxide and 0.1 kilogram
Two or four dichlorobenzoperoxides (trade name double 2 4) make it uniformly be stirred for 15 minutes, be led after stirring 1 hour
Hot silica gel.Heat conductive silica gel is stood 1 hour, heat conductive silica gel is coated on width at the first coating head 32 on apparatus for coating 30
For on 300 millimeters of polytetrafluoroethylfiberglass fiberglass-cloths, and controlling coating width is 200 millimeters, with a thickness of 0.2 millimeter, is then passed through
34 composite thickness of composite roll is 0.1 millimeter of alkali-free glass fiber cloth (marque 1080), will be compound after alkali-free glass fiber arrangement
It is dried 5 minutes in the first drying equipment 35 that temperature is 70 DEG C.Heat conductive silica gel is coated on by baking by the second coating head 36 again
On dry alkali-free glass fiber cloth, and controlling coating width is 200 millimeters, and overall thickness is 0.5 millimeter, is placed in that temperature is 70 DEG C
It is dried 5 minutes in two drying equipments 37.Then being cut into fixed length with fixed length cutting means 38 is 300 millimeters, obtains semi-finished product.
One layer of polytetrafluoroethylfiberglass fiberglass-cloth is covered in surface of semi-finished again, the pressure for then setting moulding press is 50MPa, upper die head
43, the temperature of lower die head 44 is 150 DEG C, will be covered with polytetrafluoroethylfiberglass fiberglass-cloth and is placed in the upper die head 43 of moulding press, lower die head
It is pressed 5 minutes between 44.Then upper and lower layer polytetrafluoroethylfiberglass fiberglass-cloth is torn, insulation silica gel pad is obtained.
Obtained insulation silica gel pad is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, test result
As shown in table 1.
Embodiment 2
The methyl vinyl silicone rubber that weight is 5 kilograms is placed in 10 kilograms of xylene solvent and is stirred 2 hours, silicon is made
Rubber sufficiently dissolves, then 0.1 kilogram of silane coupling A -151 of addition, 15 kilograms of boron nitride, 2 kilograms of magnesia and 0.1 kilogram
Two or four dichlorobenzoperoxides (trade name double 2 4) make it uniformly be stirred for 15 minutes, be led after stirring 1 hour
Hot silica gel.Heat conductive silica gel is stood 1 hour, heat conductive silica gel is coated on width at the first coating head 32 on apparatus for coating 30
For on 400 millimeters of polytetrafluoroethylfiberglass fiberglass-cloths, and controlling coating width is 300 millimeters, with a thickness of 0.3 millimeter, is then passed through
34 composite thickness of composite roll is 0.05 millimeter of alkali-free glass fiber cloth (marque 104), will be compound after alkali-free glass fiber arrangement
It is dried 5 minutes in the first drying equipment 35 that temperature is 70 DEG C.Heat conductive silica gel is coated on by baking by the second coating head 36 again
On dry alkali-free glass fiber cloth, and controlling coating width is 300 millimeters, and overall thickness is 0.6 millimeter, is placed in that temperature is 70 DEG C
It is dried 5 minutes in two drying equipments 37.Then being cut into fixed length with fixed length cutting means 38 is 300 millimeters, obtains semi-finished product.
One layer of polytetrafluoroethylfiberglass fiberglass-cloth is covered in surface of semi-finished again, the pressure for then setting moulding press is 60MPa, upper die head
43, the temperature of lower die head 44 is 140 DEG C, will be covered with polytetrafluoroethylfiberglass fiberglass-cloth and is placed in the upper die head 43 of moulding press, lower die head
It is pressed 5 minutes between 44.Then upper and lower layer polytetrafluoroethylfiberglass fiberglass-cloth is torn, insulation silica gel pad is obtained.
Obtained insulation silica gel pad is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, test result
As shown in table 1.
Embodiment 3
The fluorine silicone rubber that weight is 5 kilograms is placed in 10 kilograms of xylene solvent and is stirred 2 hours, keeps silicon rubber abundant
Then 0.1 kilogram of silane coupling A -151,25 kilograms of boron nitride and 0.1 kilogram of two or four dichlorobenzoperoxide is added in dissolution
(trade name double 2 4) makes it uniformly be stirred for 15 minutes, obtain heat conductive silica gel after stirring 1 hour.Heat conductive silica gel is quiet
It sets 1 hour, heat conductive silica gel is coated on to the polytetrafluoroethyl-ne that width is 400 millimeters on apparatus for coating 30 at the first coating head 32
On alkene glass-fiber-fabric, and controlling coating width is 300 millimeters, with a thickness of 0.3 millimeter, is then by 34 composite thickness of composite roll
0.1 millimeter of alkali-free glass fiber cloth (marque 104), will be compound after alkali-free glass fiber be arranged in temperature be 70 DEG C first dry
It is dried 5 minutes in dry equipment 35.Heat conductive silica gel is coated on the alkali-free glass fiber cloth of drying by the second coating head 36 again, and is controlled
Coating width processed is 300 millimeters, and overall thickness is 0.5 millimeter, is placed in the second drying equipment 37 that temperature is 70 DEG C and dries 5 points
Clock.Then being cut into fixed length with fixed length cutting means 38 is 300 millimeters, obtains semi-finished product.It is covered in surface of semi-finished again
One layer of polytetrafluoroethylfiberglass fiberglass-cloth, then set moulding press pressure be 60MPa, upper die head 43, lower die head 44 temperature be
140 DEG C, it will be covered with polytetrafluoroethylfiberglass fiberglass-cloth and be placed between the upper die head 43 of moulding press, lower die head 44 to press 5 minutes.Then
Upper and lower layer polytetrafluoroethylfiberglass fiberglass-cloth is torn, insulation silica gel pad is obtained.
Obtained insulation silica gel pad is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, test result
As shown in table 1.
Embodiment 4
The methyl vinyl silicone rubber that weight is 5 kilograms is placed in 15 kilograms of toluene solvant and is stirred 2 hours, silicon rubber is made
Glue sufficiently dissolves, and 0.05 kilogram of titanate coupling agent, 30 kilograms of boron nitride and 0.5 kilogram of containing hydrogen silicone oil and chloroplatinic acid is then added
Mixture, stirring 1 hour after, make its uniformly, be stirred for 15 minutes, obtain heat conductive silica gel.Heat conductive silica gel is stood 2 hours,
Heat conductive silica gel is coated on the fluorine element PET release film that width is 400 millimeters at the first coating head 32 on apparatus for coating 30,
And controlling coating width is 300 millimeters, and with a thickness of 0.15 millimeter, the nothing for being then 0.02 millimeter by 34 composite thickness of composite roll
Alkali glass-fiber-fabric (marque 104), will be compound after alkali-free glass fiber to be arranged in temperature be in 60 DEG C of the first drying equipment 35
Drying 8 minutes.Heat conductive silica gel is coated on the alkali-free glass fiber cloth of drying by the second coating head 36 again, and controls coating width
It is 300 millimeters, overall thickness is 0.4 millimeter, is placed in the second drying equipment 37 that temperature is 60 DEG C and dries 8 minutes.Then it uses
It is 300 millimeters that fixed length cutting means 38, which are cut into fixed length, obtains semi-finished product.One layer of fluorine element is covered in surface of semi-finished again
PET release film, then set moulding press pressure be 60MPa, upper die head 43, lower die head 44 temperature be 140 DEG C, will cover
There is polytetrafluoroethylfiberglass fiberglass-cloth to be placed between the upper die head 43 of moulding press, lower die head 44 to press 5 minutes.Then upper and lower layer is torn
Fluorine element PET release film obtains insulation silica gel pad.
Obtained insulation silica gel pad is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, test result
As shown in table 1.
Embodiment 5
The methyl phenyl silicone rubber that weight is 5 kilograms is placed in 12.5 kilograms of xylene solvent and is stirred 2 hours, silicon is made
Rubber sufficiently dissolves, and 0.625 kilogram of silane coupling A -151,11.25 kilograms of boron nitride, 6.25 kilograms of hydroxides is then added
The mixture of aluminium and 0.625 kilogram of containing hydrogen silicone oil and chloroplatinic acid after stirring 1 hour, makes it uniformly be stirred for 15 minutes, obtain
Heat conductive silica gel.Heat conductive silica gel is stood 3 hours, heat conductive silica gel is coated on width at the first coating head 32 on apparatus for coating 30
On the polytetrafluoroethylfiberglass fiberglass-cloth that degree is 400 millimeters, and controlling coating width is 300 millimeters, with a thickness of 0.4 millimeter, is then led to
Crossing 34 composite thickness of composite roll is 0.02 millimeter of alkali-free glass fiber cloth (marque 104), will be compound after alkali-free glass fiber cloth
It is placed in the first drying equipment 35 that temperature is 80 DEG C and dries 3 minutes.Heat conductive silica gel is coated on by the second coating head 36 again
On the alkali-free glass fiber cloth of drying, and controlling coating width is 300 millimeters, and overall thickness is 0.44 millimeter, and being placed in temperature is 80 DEG C
The second drying equipment 37 in dry 3 minutes.Then being cut into fixed length with fixed length cutting means 38 is 300 millimeters, obtains half
Finished product.One layer of polytetrafluoroethylfiberglass fiberglass-cloth is covered in surface of semi-finished again, the pressure for then setting moulding press is 60MPa,
Upper die head 43, lower die head 44 temperature be 140 DEG C, will be covered with polytetrafluoroethylfiberglass fiberglass-cloth be placed in moulding press upper die head 43,
It is pressed 5 minutes between lower die head 44.Then upper and lower layer polytetrafluoroethylfiberglass fiberglass-cloth is torn, insulation silica gel pad is obtained.
Obtained insulation silica gel pad is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, test result
As shown in table 1.
Obtained insulation silica gel pad is subjected to thickness, breakdown voltage, thermal coefficient and tensile strength test, test result
As shown in table 1.
Comparative example
By 10 kilograms of methyl ethylene, the aluminium oxide and 15 kilograms of average grain diameters that 30 kilograms of average grain diameters are 45 microns are
5 microns of aluminium oxide stirs evenly in kneader.After material is 4 hours cooling, then 300 grams are added in two-roll mill
Double two or four curing agent (Aksu trade name OPC-IP-50S-PS), mill 30 minutes.This sizing material is rolled using tri-roll press machine
In 0.02 millimeter of alkali-free glass fiber cloth (marque 104) upper and lower surface, insulation silica gel pad is obtained.
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example |
| Thickness (mm) | 0.3 | 0.4 | 0.35 | 0.2 | 0.3 | 0.25 |
| Breakdown voltage AC (KV) | 6 | 7 | 6 | 4.5 | 5 | 4 |
| Thermal coefficient (W/m*K) | 2.7 | 3.2 | 4.5 | 3.5 | 4.0 | 1.8 |
| Tensile strength (MPa) | 18 | 10 | 15 | 14 | 16 | 10 |
Taking this, insulation silica gel pad of the invention is by using boron nitride as main stuffing, and intermediate compound alkali-free glass fiber layer,
The obtained insulation silica gel pad with a thickness of 0.1~0.5mm, when breakdown voltage is greater than 3KV, good heat conduction effect, heat dissipation effect
Rate is high, and without adding a large amount of high thermal conductivity filler, organosilicon macromolecule structure is not destroyed, and machine-shaping is convenient.In addition, this
Invention can directly prepare insulation silica gel pad by the double coating head apparatus for coating of two-part, hot-forming by moulding press, if
The simple, high production efficiency for structure.
Although being disclosed by above embodiments to the present invention, scope of protection of the present invention is not limited thereto,
Under conditions of without departing from present inventive concept, deformation, the replacement etc. done to above each component will fall into right of the invention
In claimed range.
Claims (10)
1. a kind of insulation silica gel pad, which is characterized in that the gasket is by upper heat-conducting glue layer (10A), intermediate alkali-free glass fiber layer of cloth
(20) and lower heat-conducting glue layer (10B) is combined, and the upper and lower heat-conducting glue layer (10A, 10B) is by silicon rubber, boron nitride and auxiliary agent
Be combined, thickness is respectively 0.02~0.4 millimeter, the intermediate alkali-free glass fiber layer of cloth (20) with a thickness of 0.01~0.2
Millimeter.
2. insulation silica gel pad as described in claim 1, which is characterized in that the upper and lower heat-conducting glue layer (10A, 10B) includes
Following component based on parts by weight：
3. as claimed in claim 2 insulation silica gel pad, which is characterized in that the silicon rubber be methyl vinyl silicone rubber,
The mixture of one or more of methyl phenyl silicone rubber, fluorine silicone rubber.
4. insulation silica gel pad as claimed in claim 2, which is characterized in that the weight ratio of the silicon rubber and boron nitride is less than
Equal to 1:1, the boron nitride granularity is 0.01~100 micron, and impurity content is lower than 0.1%.
5. insulation silica gel pad as claimed in claim 2, which is characterized in that the solvent is toluene, dimethylbenzene, acetic acid second
The mixture of one or more of ester, lipid organic solvent or phenyl organic solvent, the coupling agent be silane coupling agent or
One of titanate coupling agent or and combinations thereof, the organosilicon vulcanizing agent is organic peroxide or containing hydrogen silicone oil and platiniferous
The mixture of catalyst, other described conduction powders are aluminium nitride, aluminium oxide, magnesia, zinc oxide, silicon nitride, silica
Or the mixture of one or more of aluminium hydroxide.
6. a kind of preparation method of insulation silica gel pad as described in claim 1, which is characterized in that this method includes following step
Suddenly：
A, boron nitride and auxiliary agent are added after dissolving silicon rubber, stands 1~3 hour after mixing evenly, obtains heat conductive silica gel；
B, heat conductive silica gel is coated on release film by apparatus for coating (30), it is then that heat conductive silica gel and intermediate alkali-free glass is fine
It is compound to tie up cloth, being placed in temperature is to dry 3~8 minutes at 60~80 DEG C, then heat conductive silica gel is coated on alkali-free glass fiber cloth, is set
It is formed after being to be dried 3~8 minutes at 60~80 DEG C in temperature, is cut into sheet material, obtain semi-finished product；
C, the surfaces of semi-finished product obtained in step b is covered into release film, then in molding device (40) it is hot-forming, tear from
The insulation silica gel pad is obtained after type film.
7. method as claimed in claim 6, which is characterized in that in step b and step c, the release film is polytetrafluoroethylene (PTFE)
Glass-fiber-fabric, fluorine element PET release film or fluorine-containing separated type material.
8. a kind of equipment for preparing insulation silica gel pad described in claim 1, which is characterized in that the equipment includes apparatus for coating
(30) and molding device (40), the apparatus for coating (30) is the double coating head apparatus for coating of two-part, be successively arranged unreel from
The first unreeling machine (31) of type film, the first coating head (32), the second unreeling machine (33), the composite roll for unreeling alkali-free glass fiber cloth
(34), the first drying equipment (35), the second coating head (36), the second drying equipment (37) and fixed length cutting means (38), it is described
First coating head (32), the second coating head (33) are coated with heat conductive silica gel, and first coating head (32), the second unreeling machine (33)
And composite roll (34) is respectively arranged on above release film, second coating head is set to above alkali-free glass fiber cloth.
9. equipment as claimed in claim 8, which is characterized in that the molding device (40) is tabular moulding press, is equipped with
Pedestal (41), hydraulic column (42) and the upper die head (43) of pressurization, lower die head (44) can be heated, described hydraulic column (42) one end is fixed
In on pedestal (41), the other end drives lower die head (44) to move up and down, in the upper die head (43), the contact jaw of lower die head (44)
It is respectively equipped with cache layer (45).
10. equipment as claimed in claim 9, which is characterized in that the upper die head (43), the molding combined pressure of lower die head (44) are strong
More than or equal to 10MPa.
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| CN109648940A (en) * | 2018-12-06 | 2019-04-19 | 安徽旭川新材料科技有限公司 | A kind of frosted PET hot pressing silica gel material and preparation method thereof |
| CN111548028A (en) * | 2020-05-25 | 2020-08-18 | 深圳市莱美斯硅业有限公司 | Glass fiber treating agent, treatment process of glass fiber treating agent on glass fiber and heat-conducting silicon adhesive tape |
| CN111662648A (en) * | 2020-07-04 | 2020-09-15 | 深圳市鸿富诚屏蔽材料有限公司 | Manufacturing process of heat-conducting silica gel gasket and back adhesive system used by manufacturing process |
| CN112143232A (en) * | 2020-09-09 | 2020-12-29 | 深圳市鸿富诚屏蔽材料有限公司 | High-strength ultralow-dielectric-property foaming heat-conducting silica gel gasket and preparation method thereof |
| CN112622368A (en) * | 2020-12-17 | 2021-04-09 | 杭州兆科电子材料有限公司 | Low-stress heat conduction pad, preparation method thereof and electronic product |
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| CN112143232A (en) * | 2020-09-09 | 2020-12-29 | 深圳市鸿富诚屏蔽材料有限公司 | High-strength ultralow-dielectric-property foaming heat-conducting silica gel gasket and preparation method thereof |
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| CN112622368A (en) * | 2020-12-17 | 2021-04-09 | 杭州兆科电子材料有限公司 | Low-stress heat conduction pad, preparation method thereof and electronic product |
| CN112622368B (en) * | 2020-12-17 | 2023-05-26 | 杭州兆科电子材料有限公司 | Low-stress heat conduction pad, preparation method thereof and electronic product |
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