CN108530839A - Environment friendly foam cotton material with heat-conductive characteristic and preparation method thereof - Google Patents
Environment friendly foam cotton material with heat-conductive characteristic and preparation method thereof Download PDFInfo
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- CN108530839A CN108530839A CN201810369566.XA CN201810369566A CN108530839A CN 108530839 A CN108530839 A CN 108530839A CN 201810369566 A CN201810369566 A CN 201810369566A CN 108530839 A CN108530839 A CN 108530839A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
Abstract
The invention discloses a kind of environment friendly foam cotton material and preparation method thereof with heat-conductive characteristic, environment friendly foam cotton material includes following components by mass fraction：20 parts 30 parts of polyethylene；20 parts~30 parts of poly- bio oil polyether polyol；40 parts 55 parts of epoxy resin；10 parts 70 parts of heat filling；5 parts 8 parts of dispersant；1 part 3 parts of fire retardant；1 part 10 parts of preventing aging system；13 parts of plasticizer；35 parts of foam stabilizer；1 15 parts of foaming system.The environment friendly foam cotton material and preparation method thereof with heat-conductive characteristic of the present invention, inner cell is uniform, frothing percentage is high, thermal coefficient is high, simultaneously conducive to control and production, reduce production cost, epoxy resin can make remaining ethanol amine reaction in poly- bio oil polyether polyol, further decrease residue, simultaneously, epoxy resin degradability is higher, is good for the environment.
Description
Technical field
The present invention relates to fields such as foam, heat transfer, electronics industries, specially a kind of environmental protection bubble with heat-conductive characteristic
Cotton material and preparation method thereof.
Background technology
Heat transfer (thermal conduction) be in medium without macroscopic motion when phenomenon of Heat, in solid, liquid
Can occur in body and gas, but it is stringent for, be only only pure heat transfer in solids, and fluid is even at static
State, wherein also due to density contrast caused by temperature gradient and generate free convection, therefore, thermal convection current and heat in a fluid
It conducts while occurring.In electronics industry, heat transfer is always an important process in electronics industry, the work of component
It is often the important evidence of reliability as temperature.The especially assembling of microelectronics increasingly densification, working environment drastically to
High temperature direction change.According to display, electronic component temperature often increases 2 DEG C, reliability decrease 10%, and service life at 50 DEG C only has 25
DEG C when 1/6, heat conductivility raising usually along with the optimization of heat dissipation performance.Therefore, Heat-conductive gap interface material is increasingly
Attract attention, with high thermal conductivity, good elasticity, electrical insulating property, leakproofness, and can effectively between filling interface sky
Gap removes air between cold and hot interface, can radiator effect be improved 40% or more.
Foam be it is a kind of with buffering, damping, sound-absorbing, obdurability and other effects quality material, existing rubber, polyurethane,
The antistatic foams such as polyethylene, polyethers, conducting foam.But few high heat conduction high compression rubber foam materials.Although
There are several foam materials with heat-conduction effect at present, but its inner cell is uneven, frothing percentage is low, heat conduction system
Number is low, has the shortcomings that control difficulty is big, production cost is high, molding is difficult.Meanwhile existing foam, to the heavy contamination of environment,
Degradability is poor.
Invention content
The purpose of the present invention is：A kind of environment friendly foam cotton material and preparation method thereof with heat-conductive characteristic is provided, with solution
Certainly at least one of prior art technical problem.
Realizing the technical solution of above-mentioned purpose is：A kind of environment friendly foam cotton material with heat-conductive characteristic, which is characterized in that
Include following components by mass fraction：Polyethylene：20 parts -30 parts；Poly- bio oil polyether polyol：20 parts~30 parts；Asphalt mixtures modified by epoxy resin
Fat：40 parts -55 parts；Heat filling：10 parts -70 parts；Dispersant：5 parts -8 parts；Fire retardant；1 part -3 parts；Preventing aging system：1 part -10
Part；Plasticizer：1-3 parts；Foam stabilizer：3-5 parts；Foaming system：1-15 parts.
Further, the heat filling is micron grade aluminum oxide or silicon powder.
Further, the foam stabilizer is organosilicon foam stabilizer.
Further, the key structural feature of the plasticizer includes that the length that is catalyzed and synthesized by novel metallocene catalyst is embedding
Section polyoctenamer segment is paraffin oil.
Further, the preventing aging system is 2-mercaptobenzimidazole, the polymerization of 2,2,4- trimethyl -1,2- dihyaroquinolines
Or mixtures thereof one of body.
Further, the poly- bio oil polyether polyol is transesterification anti-by including mainly poly- bio oil and ethanol amine progress
The polyalcohol initiator that should be formed, the polyalcohol initiator carry out alkoxide ring-opening polymerisation with propylene oxide and are made.
The present invention also provides a kind of preparation methods of the environment friendly foam cotton material with heat-conductive characteristic, include the following steps：
Obtain each component of the environment friendly foam cotton material；Each component is added on screw extruder and carries out plasticizing extrusion master slice；So
After carried out respectively to the master slice electron radiation crosslinking Treatment, foaming processing and press polish and handle to obtain the foam material.
Further, the electron radiation crosslinking Treatment includes：The master slice is positioned on electron accelerator and carries out spoke
Crosslinking is penetrated, control dose of radiation is in 50kGy~55kGy；And/or；The foaming is handled：By the institute after cross-linking radiation
It states master slice and carries out Vertical Free foaming, foaming furnace operating temperature is 180 DEG C~220 DEG C；And/or；The press polish is handled：It will
The master slice after foaming, which is placed in double roller, carries out multiple press polish processing, control the temperature of the double roller 110~
Between 120 DEG C.
Further, the preparation method of the environment friendly foam cotton material with heat-conductive characteristic further includes that poly- bio oil is poly-
Ethoxylated polyhydric alcohol synthesis step includes by the ethanol amine of the poly- bio oil of 80~95 parts by weight and 5~20 parts by weight in nitrogen atmosphere
Under, 150~250 DEG C carry out the polyalcohol initiator that 4~12h of transesterification is formed；Then, it is continually fed at 80~160 DEG C
Propylene oxide carries out polymerisation, polymerization 4~obtain poly- bio oil polyether polyol afterwards for 24 hours.
It is an advantage of the invention that：The environment friendly foam cotton material and preparation method thereof with heat-conductive characteristic of the present invention, it is internal
Uniform foam cell, frothing percentage are high, thermal coefficient is high, while conducive to control and production, reducing production cost.Used consor object
Oily polyether polyol, polyethylene crosslinking, meanwhile, epoxy resin can make remaining ethanol amine in poly- bio oil polyether polyol anti-
It answers, further decreases residue, meanwhile, epoxy resin degradability is higher, is good for the environment.
Specific implementation mode
A kind of environment friendly foam cotton material with heat-conductive characteristic, includes following components by mass fraction：Polyethylene：20 parts-
30 parts；Poly- bio oil polyether polyol：20 parts~30 parts；Epoxy resin：40 parts -55 parts；Heat filling：10 parts -70 parts；Dispersion
Agent：5 parts -8 parts；Fire retardant；1 part -3 parts；Preventing aging system：1 part -10 parts；Plasticizer：1-3 parts；Foam stabilizer：3-5 parts；Foaming body
System：1-15 parts.Wherein, every part of weight is set as 100g.
Wherein, the heat filling is micron grade aluminum oxide or silicon powder.The foam stabilizer is organosilicon foam stabilizer.It is described
The key structural feature of plasticizer includes the long block polyoctenamer segment catalyzed and synthesized by novel metallocene catalyst or is paraffin
Oil.The preventing aging system is one of 2-mercaptobenzimidazole, 2,2,4- trimethyl -1,2- dihyaroquinoline condensates or its mixing
Object.The poly- bio oil polyether polyol is by the polyalcohol mainly including poly- bio oil with ethanol amine progress transesterification formation
Initiator, the polyalcohol initiator carry out alkoxide ring-opening polymerisation with propylene oxide and are made.
Embodiment 1：A kind of preparation method of the environment friendly foam cotton material with heat-conductive characteristic, includes the following steps：It obtains
Each component of the environment friendly foam cotton material, in this step, including poly- bio oil polyether polyol synthesis step, including by 80
In a nitrogen atmosphere with the ethanol amine of 5~20 parts by weight, 150~250 DEG C of progress are transesterification anti-for the poly- bio oil of~95 parts by weight
The polyalcohol initiator for answering 4~12h to be formed；Then, it is continually fed into propylene oxide at 80~160 DEG C and carries out polymerisation, polymerization 4
~obtain poly- bio oil polyether polyol afterwards for 24 hours.Wherein, 20 parts of polyethylene is obtained；Poly- bio oil polyether polyol：20 parts；Ring
40 parts of oxygen resin；10 parts of aluminium oxide；Dispersant：5 parts；Fire retardant：1 part；2-mercaptobenzimidazole：1 part；Paraffin oil：1 part；It is even
Infusion：3 parts；Foaming system：1 part.
Each component is added on screw extruder and carries out plasticizing extrusion master slice；Then it carries out carrying out the master slice respectively
Electron radiation crosslinking Treatment, foaming processing and press polish handle to obtain the foam material.In this step, the electron radiation is handed over
Connection is handled：The master slice is positioned on electron accelerator and carries out crosslinking with radiation, control dose of radiation is in 50kGy.
The master slice after cross-linking radiation is subjected to Vertical Free foaming, foaming furnace operating temperature is 180 DEG C~220
℃。
The master slice after foaming is placed in double roller and carries out multiple press polish processing, controls the temperature of the double roller
Degree is between 110~120 DEG C.As needed after 3 press polish processing, the environment friendly foam cotton material with high tensile is obtained,
Its thickness is 0.1mm, has the abscess that haves three layers in thickness direction, thickness deviation is within 6%.In addition, the environment friendly foam cotton material
Apparent density is 0.4g/cm3, and compressive strength (25% compression ratio) is 70KPa, tensile strength longitudinal direction 4.5MPa, longitudinal tensile strain rate
257%, transverse tensile strength 2.6MPa, cross direction elongation 355%.Its thermal coefficient is 0.79W (m.K)；The environment friendly foam cotton material
Material is applicable as the sealing buffering or adhesive band base of the form and touch screen of electronic product.
Embodiment 2：A kind of preparation method of the environment friendly foam cotton material with heat-conductive characteristic, includes the following steps：It obtains
Each component of the environment friendly foam cotton material, in this step, including poly- bio oil polyether polyol synthesis step, including by 80
In a nitrogen atmosphere with the ethanol amine of 5~20 parts by weight, 150~250 DEG C of progress are transesterification anti-for the poly- bio oil of~95 parts by weight
The polyalcohol initiator for answering 4~12h to be formed；Then, it is continually fed into propylene oxide at 80~160 DEG C and carries out polymerisation, polymerization 4
~obtain poly- bio oil polyether polyol afterwards for 24 hours.Wherein, 25 parts of polyethylene is obtained；Poly- bio oil polyether polyol：25 parts；Ring
50 parts of oxygen resin；30 parts of aluminium oxide；Dispersant：7 parts；Fire retardant：2 parts；2-mercaptobenzimidazole：2 parts；Paraffin oil：2 parts；It is even
Infusion：4 parts；Foaming system：5 parts.
Each component is added on screw extruder and carries out plasticizing extrusion master slice；Then it carries out carrying out the master slice respectively
Electron radiation crosslinking Treatment, foaming processing and press polish handle to obtain the foam material.In this step, the electron radiation is handed over
Connection is handled：The master slice is positioned on electron accelerator and carries out crosslinking with radiation, control dose of radiation is in 55kGy.
The master slice after cross-linking radiation is subjected to Vertical Free foaming, foaming furnace operating temperature is 180 DEG C~220
℃。
The master slice after foaming is placed in double roller and carries out multiple press polish processing, controls the temperature of the double roller
Degree is between 110~120 DEG C.As needed after 3 press polish processing, the environment friendly foam cotton material with high tensile is obtained,
Its thickness is 0.1mm, has the abscess that haves three layers in thickness direction, thickness deviation is within 6%.In addition, the environment friendly foam cotton material
Apparent density is 0.45g/cm3, and compressive strength (25% compression ratio) is 77KPa, tensile strength longitudinal direction 4.8MPa, longitudinal tensile strain rate
298%, transverse tensile strength 2.9MPa, cross direction elongation 387%.Its thermal coefficient is 0.87W (m.K)；The environment friendly foam cotton material
Material is applicable as the sealing buffering or adhesive band base of the form and touch screen of electronic product.
Embodiment 3：A kind of preparation method of the environment friendly foam cotton material with heat-conductive characteristic, includes the following steps：It obtains
Each component of the environment friendly foam cotton material, in this step, including poly- bio oil polyether polyol synthesis step, including by 80
In a nitrogen atmosphere with the ethanol amine of 5~20 parts by weight, 150~250 DEG C of progress are transesterification anti-for the poly- bio oil of~95 parts by weight
The polyalcohol initiator for answering 4~12h to be formed；Then, it is continually fed into propylene oxide at 80~160 DEG C and carries out polymerisation, polymerization 4
~obtain poly- bio oil polyether polyol afterwards for 24 hours.Wherein, 30 parts of polyethylene is obtained；Poly- bio oil polyether polyol：30 parts；Ring
55 parts of oxygen resin；70 parts of silicon powder；Dispersant：8 parts；Fire retardant：3 parts；2-mercaptobenzimidazole, 2,2,4- trimethyls -1,2-
1 part of or mixtures thereof one of dihyaroquinoline condensate；Paraffin oil：1 part；Foam stabilizer：3 parts；Foaming system：15 parts.
Each component is added on screw extruder and carries out plasticizing extrusion master slice；Then it carries out carrying out the master slice respectively
Electron radiation crosslinking Treatment, foaming processing and press polish handle to obtain the foam material.In this step, the electron radiation is handed over
Connection is handled：The master slice is positioned on electron accelerator and carries out crosslinking with radiation, control dose of radiation is in 52kGy.
The master slice after cross-linking radiation is subjected to Vertical Free foaming, foaming furnace operating temperature is 180 DEG C~220
℃。
The master slice after foaming is placed in double roller and carries out multiple press polish processing, controls the temperature of the double roller
Degree is between 110~120 DEG C.As needed after 3 press polish processing, the environment friendly foam cotton material with high tensile is obtained,
Its thickness is 0.1mm, has the abscess that haves three layers in thickness direction, thickness deviation is within 6%.In addition, the environment friendly foam cotton material
Apparent density is 0.3.5g/cm3, and compressive strength (25% compression ratio) is 76KPa, tensile strength longitudinal direction 4.9MPa, longitudinal elongation
Rate 311%, transverse tensile strength 3.2MPa, cross direction elongation 423%.Its thermal coefficient is 0.81W (m.K), the environment friendly foam cotton
Material is applicable as the form of electronic product and the sealing buffering or adhesive band base of touch screen.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should be included in the present invention.
Claims (9)
1. a kind of environment friendly foam cotton material with heat-conductive characteristic, which is characterized in that by mass fraction include following components：
Polyethylene：20 parts -30 parts；
Poly- bio oil polyether polyol：20 parts~30 parts；
Epoxy resin：40 parts -55 parts；
Heat filling：10 parts -70 parts；
Dispersant：5 parts -8 parts；
Fire retardant：1 part -3 parts；
Preventing aging system：1 part -10 parts；
Plasticizer：1-3 parts；
Foam stabilizer：3-5 parts；
Foaming system：1-15 parts.
2. the environment friendly foam cotton material according to claim 1 with heat-conductive characteristic, which is characterized in that the heat filling
For micron grade aluminum oxide or silicon powder.
3. the environment friendly foam cotton material according to claim 1 with heat-conductive characteristic, which is characterized in that the foam stabilizer is
Organosilicon foam stabilizer.
4. the environment friendly foam cotton material according to claim 1 with heat-conductive characteristic, which is characterized in that the plasticizer
Key structural feature includes the long block polyoctenamer segment catalyzed and synthesized by novel metallocene catalyst or is paraffin oil.
5. the environment friendly foam cotton material according to claim 1 with heat-conductive characteristic, which is characterized in that the preventing aging system
For 2-mercaptobenzimidazole, 2, or mixtures thereof one of 2,4- trimethyl -1,2- dihyaroquinoline condensates.
6. the environment friendly foam cotton material according to claim 1 with heat-conductive characteristic, which is characterized in that the poly- bio oil
Polyether polyol is described polynary by the polyalcohol initiator mainly including poly- bio oil with ethanol amine progress transesterification formation
Alcohol initiator carries out alkoxide ring-opening polymerisation with propylene oxide and is made.
7. a kind of preparation method of the environment friendly foam cotton material with heat-conductive characteristic, which is characterized in that include the following steps：
Obtain each component of the environment friendly foam cotton material as described in claim any one of 1-6；
Each component is added on screw extruder and carries out plasticizing extrusion master slice；
Then it carries out carrying out the master slice respectively electron radiation crosslinking Treatment, foaming processing and press polish to handle to obtain the foam
Material.
8. the preparation method of the environment friendly foam cotton material according to claim 7 with heat-conductive characteristic, which is characterized in that
The electron radiation crosslinking Treatment includes：The master slice is positioned on electron accelerator and carries out crosslinking with radiation, controls spoke
Dosage is penetrated in 50kGy~55kGy；And/or
The foaming is handled：The master slice after cross-linking radiation is subjected to Vertical Free foaming, foaming furnace work temperature
Degree is 180 DEG C~220 DEG C；And/or
The press polish is handled：The master slice after foaming is placed in double roller and carries out multiple press polish processing, is controlled
The temperature of the double roller is made between 110~120 DEG C.
9. the preparation method of the environment friendly foam cotton material according to claim 7 with heat-conductive characteristic, which is characterized in that also
Include by the second of the poly- bio oil and 5~20 parts by weight of 80~95 parts by weight including poly- bio oil polyether polyol synthesis step
In a nitrogen atmosphere, 150~250 DEG C carry out the polyalcohol initiator that 4~12h of transesterification is formed to hydramine；Then, 80~
160 DEG C are continually fed into propylene oxide and carry out polymerisation, polymerization 4~obtain poly- bio oil polyether polyol afterwards for 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369566.XA CN108530839A (en) | 2018-04-23 | 2018-04-23 | Environment friendly foam cotton material with heat-conductive characteristic and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810369566.XA CN108530839A (en) | 2018-04-23 | 2018-04-23 | Environment friendly foam cotton material with heat-conductive characteristic and preparation method thereof |
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| Publication Number | Publication Date |
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| CN108530839A true CN108530839A (en) | 2018-09-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561056A (en) * | 2022-02-25 | 2022-05-31 | 东莞市鹏园新材料有限公司 | Low-thermal conductivity XPE foam and preparation method thereof |
| CN115232460A (en) * | 2022-08-29 | 2022-10-25 | 启明星精密科技(惠州)有限公司 | Method for manufacturing environment-friendly foam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104356349A (en) * | 2014-10-31 | 2015-02-18 | 中科院广州化学有限公司 | Flame-retardant type polyurethane hard foam material as well as preparation method and application thereof |
| CN106397731A (en) * | 2016-09-22 | 2017-02-15 | 上海馨源新材料科技有限公司 | Automobile sponge with high-efficiency sound insulation and sound absorption and preparation process thereof |
| CN107759883A (en) * | 2017-11-02 | 2018-03-06 | 浙江万里新材料科技有限公司 | A kind of crosslinked polyethylene foam material and preparation method thereof |
-
2018
- 2018-04-23 CN CN201810369566.XA patent/CN108530839A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104356349A (en) * | 2014-10-31 | 2015-02-18 | 中科院广州化学有限公司 | Flame-retardant type polyurethane hard foam material as well as preparation method and application thereof |
| CN106397731A (en) * | 2016-09-22 | 2017-02-15 | 上海馨源新材料科技有限公司 | Automobile sponge with high-efficiency sound insulation and sound absorption and preparation process thereof |
| CN107759883A (en) * | 2017-11-02 | 2018-03-06 | 浙江万里新材料科技有限公司 | A kind of crosslinked polyethylene foam material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561056A (en) * | 2022-02-25 | 2022-05-31 | 东莞市鹏园新材料有限公司 | Low-thermal conductivity XPE foam and preparation method thereof |
| CN115232460A (en) * | 2022-08-29 | 2022-10-25 | 启明星精密科技(惠州)有限公司 | Method for manufacturing environment-friendly foam |
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