CN110776749A - Heat-conducting anti-static silica gel product and micro injection molding process thereof - Google Patents
Heat-conducting anti-static silica gel product and micro injection molding process thereof Download PDFInfo
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- 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
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
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- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
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- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
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- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
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- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76551—Time
- B29C2945/76561—Time duration
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- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76732—Mould
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- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76822—Phase or stage of control
- B29C2945/76862—Holding, dwelling
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/017—Additives being an antistatic agent
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention belongs to the technical field of new material processing, and particularly relates to a heat-conducting anti-static silica gel product and a micro injection molding process thereof. The heat-conducting anti-static silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the paint comprises 100 parts of bi-component liquid silica gel, 7-15 parts of polyimide, 4-10 parts of carbon nano tube, 5-10 parts of diphenyl silanediol, 4-12 parts of nano silicon dioxide, 1-4 parts of antistatic agent, 1-4 parts of hydroxymethyl cellulose, 5-12 parts of deionized water and 0.5-3 parts of pigment; the micro-injection molding process is adopted, so that a precise heat-conducting anti-static silica gel product can be prepared, the preparation process is simple, environment-friendly and healthy, the heat-conducting anti-static silica gel product has excellent performance when being applied to medical and household appliance parts, the heat-conducting anti-static silica gel product has the advantages of heat conduction and long service life, and can be used as a kitchen ware product, a medical product, a mobile phone cover, an automobile interior trim part and the like, and the quality is greatly improved.
Description
Technical Field
The invention belongs to the technical field of new material modification processing, and particularly relates to a heat-conducting anti-static silica gel product and a micro injection molding process thereof.
Background
Liquid Silicone Rubber (LSR) is a product which is popular among consumers and manufacturers, is made of Silicone products, has good elasticity, water resistance, moisture resistance and corrosion resistance of various chemical substances such as acid, alkali and the like, and is generally used for replacing plastic articles for daily use. The liquid silica gel is injected into a hot runner mold to manufacture the silica gel product, and the advantages of one-step molding, no waste material, automation and the like can be achieved. However, the existing silica gel product has strong adsorption capacity due to the inherent non-conducting and non-conducting properties of the material, and if the silica gel product is exposed in air for use, the silica gel product is easy to absorb dust and affects the beautiful and tidy appearance of the silica gel product.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a heat-conducting anti-static silica gel product and a micro injection molding process thereof, and the clean silica gel product which does not occupy dust particles is obtained.
The technical scheme adopted by the invention is as follows: the invention provides a heat-conducting anti-static silica gel product which is prepared from the following raw materials in parts by weight through a micro injection molding process: the paint comprises 100 parts of bi-component liquid silica gel, 7-15 parts of polyimide, 4-10 parts of carbon nano tube, 5-10 parts of diphenyl silanediol, 4-12 parts of nano silicon dioxide, 1-4 parts of antistatic agent, 1-4 parts of hydroxymethyl cellulose, 5-12 parts of deionized water and 0.5-3 parts of pigment; the bi-component liquid silica gel comprises a component A and a component B; the liquid silica gel component A comprises vinyl polysiloxane and an inhibitor; the liquid silica gel component B comprises a cross-linking agent and a platinum catalyst.
Preferably, the heat-conducting antistatic silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the paint comprises 100 parts of bi-component liquid silica gel, 7-12 parts of polyimide, 4-8 parts of carbon nano tube, 6-10 parts of diphenyl silanediol, 4-12 parts of nano silicon dioxide, 1-4 parts of antistatic agent, 1-4 parts of hydroxymethyl cellulose, 5-10 parts of deionized water and 0.5-3 parts of pigment.
Preferably, the heat-conducting antistatic silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 7 parts of polyimide, 6 parts of carbon nano tube, 10 parts of diphenyl silanediol, 8 parts of nano silicon dioxide, 1 part of antistatic agent, 1 part of hydroxymethyl cellulose, 5 parts of deionized water and 1 part of pigment.
Preferably, the heat-conducting antistatic silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 10 parts of polyimide, 8 parts of carbon nano tube, 6 parts of diphenyl silanediol, 10 parts of nano silicon dioxide, 2 parts of antistatic agent, 3 parts of hydroxymethyl cellulose, 8 parts of deionized water and 0.5 part of pigment.
Further, the cross-linking agent is octamethyltetrasiloxane; the platinum catalyst is a tetramethyldivinyldisiloxane chloroplatinic acid complex.
Further, the inhibitor is alkynylcyclohexanol.
Further, the antistatic agent is an alkyl amino acid metal salt.
Further, the particle size of the nano silicon dioxide is less than 50 nm.
A micro injection molding process of a heat-conducting anti-static silica gel product comprises the following steps: (S1) preparing raw materials: weighing all the raw materials according to the weight parts of the raw materials for forming the heat-conducting anti-static silica gel product, and respectively weighing the component A and the component B according to the mass part of 1: 1; (S2) ball milling and dispersing the component A, polyimide, carbon nano tubes, diphenyl silanediol and hydroxymethyl cellulose for 2-4 hours at the rotating speed of 200-300 rpm to obtain a mixed material A'; ball-milling and dispersing the component B, nano silicon dioxide, an antistatic agent, deionized water and a pigment for 2-4 hours at a rotating speed of 200-300 rpm to obtain a mixed material B'; (S3) component mixing: adding the uniformly dispersed mixed material A 'and the mixed material B' into a tolerized emulsifying dispersion machine according to the mass ratio of 1:1, uniformly mixing and stirring, and vacuumizing by using a vacuum pump to remove bubbles; (S4) setting technological parameters of micro injection molding, and preheating a mold of a micro injection molding machine to 100-125 ℃; (S5) micro injection molding: and (5) putting the mixture vacuumized in the step (S3) into a micro injection molding machine for injection molding, standing for 30-60 min after molding, and taking out to obtain the heat-conducting anti-static silica gel product.
Further, the micro injection molding process parameters comprise injection molding temperature, mold temperature, injection pressure, dwell time, dwell pressure and curing time in the mold; the injection molding temperature is 120-130 ℃, the injection pressure is 20-40 MPa, the pressure maintaining time is 10-20 s, and the curing time is 30 min.
The invention has the beneficial effects that:
(1) according to the invention, the carbon nano tube is compounded with the liquid silica gel, and the flexible silica gel product with heat conduction and antistatic performance is prepared by a micro injection molding process; (2) in the heat-conducting antistatic silica gel product, the metal salt of alkyl amino acid and the carbon nano tube have synergistic effect to generate antistatic effect; (3) the heat-conducting antistatic silica gel product is catalyzed by a platinum complex compound and inhibited by alkynol inhibitors, so that the vulcanization efficiency is improved, and compared with a crosslinking system vulcanized by peroxide, the heat-conducting antistatic silica gel product is more uniform, better in strength and longer in service life; the platinum catalyst is used, no by-product is generated during crosslinking, and the odor of the vulcanized rubber is greatly reduced; (4) the invention adopts the micro-injection molding process, can prepare and obtain a more precise heat-conducting anti-static silica gel product, has simple, environment-friendly and healthy preparation process, has excellent performance when being applied to medical and household appliance parts, and has heat conduction and anti-static functions, greatly improved quality and long service life; (5) the heat-conducting antistatic silica gel product can be a kitchen ware product, a medical product, a mobile phone cover, an automotive interior trim part and the like.
Detailed Description
The invention will be further elucidated by means of several specific examples, which are intended to be illustrative only and not limiting.
Example 1:
a heat-conducting anti-static silica gel product is prepared by the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 7 parts of polyimide, 6 parts of carbon nano tube, 10 parts of diphenyl silanediol, 8 parts of nano silicon dioxide, 1 part of antistatic agent, 1 part of hydroxymethyl cellulose, 5 parts of deionized water and 1 part of pigment.
The cross-linking agent is octamethyltetrasiloxane; the platinum catalyst is a tetramethyldivinyldisiloxane chloroplatinic acid complex.
The inhibitor is alkynyl cyclohexanol.
The antistatic agent is metal alkyl amino acid salt.
The particle size of the nano silicon dioxide is less than 50 nm.
A micro injection molding process of a heat-conducting anti-static silica gel product comprises the following steps: (S1) preparing raw materials: weighing all the raw materials according to the weight parts of the raw materials for forming the heat-conducting anti-static silica gel product, and respectively weighing the component A and the component B according to the mass part of 1: 1; (S2) ball milling and dispersing the component A, polyimide, carbon nano tubes, diphenyl silanediol and hydroxymethyl cellulose for 2 hours at the rotating speed of 200rpm to obtain a mixed material A'; ball-milling and dispersing the component B, nano silicon dioxide, an antistatic agent, deionized water and a pigment for 2 hours at the rotating speed of 200rpm to obtain a mixed material B'; (S3) component mixing: adding the uniformly dispersed mixed material A 'and the mixed material B' into a tolerized emulsifying dispersion machine according to the mass ratio of 1:1, uniformly mixing and stirring, and vacuumizing by using a vacuum pump to remove bubbles; (S4) setting technological parameters of micro injection molding, and preheating a mold of a micro injection molding machine to 100-125 ℃; (S5) micro injection molding: and (5) putting the mixture vacuumized in the step (S3) into a micro injection molding machine for injection molding, standing for 30min after molding, and taking out to obtain the heat-conducting anti-static silica gel product.
Further, the micro injection molding process parameters comprise injection molding temperature, mold temperature, injection pressure, dwell time, dwell pressure and curing time in the mold; the injection molding temperature is 130 ℃, the injection pressure is 20MPa, the pressure maintaining time is 20s, and the curing time is 30 min.
Example 2:
a heat-conducting anti-static silica gel product is prepared by the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 10 parts of polyimide, 8 parts of carbon nano tube, 6 parts of diphenyl silanediol, 10 parts of nano silicon dioxide, 2 parts of antistatic agent, 3 parts of hydroxymethyl cellulose, 8 parts of deionized water and 0.5 part of pigment.
Further, the cross-linking agent is octamethyltetrasiloxane; the platinum catalyst is a tetramethyldivinyldisiloxane chloroplatinic acid complex.
Further, the inhibitor is alkynylcyclohexanol.
Further, the antistatic agent is an alkyl amino acid metal salt.
Further, the particle size of the nano silicon dioxide is less than 50 nm.
A micro injection molding process of a heat-conducting anti-static silica gel product comprises the following steps: (S1) preparing raw materials: weighing all the raw materials according to the weight parts of the raw materials for forming the heat-conducting anti-static silica gel product, and respectively weighing the component A and the component B according to the mass part of 1: 1; (S2) ball milling and dispersing the component A, polyimide, carbon nano tubes, diphenyl silanediol and hydroxymethyl cellulose for 2.5 hours at the rotating speed of 200rpm to obtain a mixed material A'; ball-milling and dispersing the component B, nano silicon dioxide, an antistatic agent, deionized water and a pigment for 2.5 hours at the rotating speed of 200rpm to obtain a mixed material B'; (S3) component mixing: adding the uniformly dispersed mixed material A 'and the mixed material B' into a tolerized emulsifying dispersion machine according to the mass ratio of 1:1, uniformly mixing and stirring, and vacuumizing by using a vacuum pump to remove bubbles; (S4) setting technological parameters of micro injection molding, and preheating a mold of a micro injection molding machine to 125 ℃; (S5) micro injection molding: and (5) putting the mixture vacuumized in the step (S3) into a micro injection molding machine for injection molding, standing for 30min after molding, and taking out to obtain the heat-conducting anti-static silica gel product.
Further, the micro injection molding process parameters comprise injection molding temperature, mold temperature, injection pressure, dwell time, dwell pressure and curing time in the mold; the injection molding temperature is 125 ℃, the injection pressure is 30MPa, the pressure maintaining time is 15s, and the curing time is 30 min.
Example 3:
a heat-conducting anti-static silica gel product is prepared by the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 12 parts of polyimide, 4 parts of carbon nano tube, 10 parts of diphenyl silanediol, 12 parts of nano silicon dioxide, 4 parts of antistatic agent, 2 parts of hydroxymethyl cellulose, 10 parts of deionized water and 2 parts of pigment.
The cross-linking agent is octamethyltetrasiloxane; the platinum catalyst is a tetramethyldivinyldisiloxane chloroplatinic acid complex. The inhibitor is alkynyl cyclohexanol. The antistatic agent is metal alkyl amino acid salt. The particle size of the nano silicon dioxide is less than 50 nm.
A micro injection molding process of a heat-conducting anti-static silica gel product comprises the following steps: (S1) preparing raw materials: weighing all the raw materials according to the weight parts of the raw materials for forming the heat-conducting anti-static silica gel product, and respectively weighing the component A and the component B according to the mass part of 1: 1; (S2) ball milling and dispersing the component A, polyimide, carbon nano tubes, diphenyl silanediol and hydroxymethyl cellulose for 2 hours at the rotating speed of 300rpm to obtain a mixed material A'; ball-milling and dispersing the component B, nano silicon dioxide, an antistatic agent, deionized water and a pigment for 2 hours at the rotating speed of 300rpm to obtain a mixed material B'; (S3) component mixing: adding the uniformly dispersed mixed material A 'and the mixed material B' into a tolerized emulsifying dispersion machine according to the mass ratio of 1:1, uniformly mixing and stirring, and vacuumizing by using a vacuum pump to remove bubbles; (S4) setting technological parameters of micro injection molding, and preheating a mold of a micro injection molding machine to 125 ℃; (S5) micro injection molding: and (5) putting the mixture vacuumized in the step (S3) into a micro injection molding machine for injection molding, standing for 40min after molding, and taking out to obtain the heat-conducting anti-static silica gel product.
Further, the micro injection molding process parameters comprise injection molding temperature, mold temperature, injection pressure, dwell time, dwell pressure and curing time in the mold; the injection molding temperature is 130 ℃, the injection pressure is 40MPa, the pressure maintaining time is 10s, and the curing time is 30 min.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. A heat-conducting antistatic silica gel product is characterized in that: the heat-conducting anti-static silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the paint comprises 100 parts of bi-component liquid silica gel, 7-15 parts of polyimide, 4-10 parts of carbon nano tube, 5-10 parts of diphenyl silanediol, 4-12 parts of nano silicon dioxide, 1-4 parts of antistatic agent, 1-4 parts of hydroxymethyl cellulose, 5-12 parts of deionized water and 0.5-3 parts of pigment; the bi-component liquid silica gel comprises a component A and a component B; the liquid silica gel component A comprises vinyl polysiloxane and an inhibitor; the liquid silica gel component B comprises a cross-linking agent and a platinum catalyst.
2. The thermally conductive, antistatic silicone product of claim 1, wherein: the heat-conducting anti-static silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the paint comprises 100 parts of bi-component liquid silica gel, 7-12 parts of polyimide, 4-8 parts of carbon nano tube, 6-10 parts of diphenyl silanediol, 4-12 parts of nano silicon dioxide, 1-4 parts of antistatic agent, 1-4 parts of hydroxymethyl cellulose, 5-10 parts of deionized water and 0.5-3 parts of pigment.
3. The thermally conductive, antistatic silicone product of claim 1, wherein: the heat-conducting anti-static silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 7 parts of polyimide, 6 parts of carbon nano tube, 10 parts of diphenyl silanediol, 8 parts of nano silicon dioxide, 1 part of antistatic agent, 1 part of hydroxymethyl cellulose, 5 parts of deionized water and 1 part of pigment.
4. The thermally conductive, antistatic silicone product of claim 1, wherein: the heat-conducting anti-static silica gel product is prepared from the following raw materials in parts by weight through a micro injection molding process: the antistatic liquid comprises 100 parts of bicomponent liquid silica gel, 10 parts of polyimide, 8 parts of carbon nano tube, 6 parts of diphenyl silanediol, 10 parts of nano silicon dioxide, 2 parts of antistatic agent, 3 parts of hydroxymethyl cellulose, 8 parts of deionized water and 0.5 part of pigment.
5. A heat-conducting antistatic silica gel product according to any one of claims 1 to 4, characterized in that: the cross-linking agent is octamethyltetrasiloxane; the platinum catalyst is a tetramethyldivinyldisiloxane chloroplatinic acid complex.
6. A heat-conducting antistatic silica gel product according to any one of claims 1 to 4, characterized in that: the inhibitor is alkynyl cyclohexanol.
7. A heat-conducting antistatic silica gel product according to any one of claims 1 to 4, characterized in that: the antistatic agent is metal alkyl amino acid salt.
8. A heat-conducting antistatic silica gel product according to any one of claims 1 to 4, characterized in that: the particle size of the nano silicon dioxide is less than 50 nm.
9. A micro injection molding process of the heat-conducting antistatic silica gel product according to any one of claims 1 to 4, characterized in that: the method comprises the following steps: (S1) preparing raw materials: weighing all the raw materials according to the weight parts of the raw materials for forming the heat-conducting anti-static silica gel product, and respectively weighing the component A and the component B according to the mass part of 1: 1; (S2) ball milling and dispersing the component A, polyimide, carbon nano tubes, diphenyl silanediol and hydroxymethyl cellulose for 2-4 hours at the rotating speed of 200-300 rpm to obtain a mixed material A'; ball-milling and dispersing the component B, nano silicon dioxide, an antistatic agent, deionized water and a pigment for 2-4 hours at a rotating speed of 200-300 rpm to obtain a mixed material B'; (S3) component mixing: adding the uniformly dispersed mixed material A 'and the mixed material B' into a tolerized emulsifying dispersion machine according to the mass ratio of 1:1, uniformly mixing and stirring, and vacuumizing by using a vacuum pump to remove bubbles; (S4) setting technological parameters of micro injection molding, and preheating a mold of a micro injection molding machine to 100-125 ℃; (S5) micro injection molding: and (5) putting the mixture vacuumized in the step (S3) into a micro injection molding machine for injection molding, standing for 30-60 min after molding, and taking out to obtain the heat-conducting anti-static silica gel product.
10. The micro injection molding process of a heat-conducting antistatic silica gel product according to claim 9, characterized in that: the micro injection molding process parameters comprise injection molding temperature, mold temperature, injection pressure, pressure maintaining time, pressure maintaining pressure and curing time in the mold; the injection molding temperature is 120-130 ℃, the injection pressure is 20-40 MPa, the pressure maintaining time is 10-20 s, and the curing time is 30 min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114290598A (en) * | 2021-12-20 | 2022-04-08 | 隆扬电子(昆山)股份有限公司 | Suction nozzle forming process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101338075A (en) * | 2007-04-18 | 2009-01-07 | 信越化学工业株式会社 | Antistatic silicone rubber mold-making material |
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