CN109703127A - A kind of composite board and its processing method - Google Patents
A kind of composite board and its processing method Download PDFInfo
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- CN109703127A CN109703127A CN201910020083.3A CN201910020083A CN109703127A CN 109703127 A CN109703127 A CN 109703127A CN 201910020083 A CN201910020083 A CN 201910020083A CN 109703127 A CN109703127 A CN 109703127A
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Abstract
The invention discloses a kind of composite board and its processing methods, belong to composite board field, a kind of composite board, including main inner plating and secondary inner plating, main inner plating are located at the left side of secondary inner plating, heat storing plate is bonded between main inner plating and secondary inner plating, when temperature is high, main deformed plate heat shrinkable volume reduces the present invention, and heat storing plate can be absorbed extraneous thermal energy by the gap at main deformed plate and be stored, reduce heat to indoor transmitting, keeps indoor good hot comfort；When temperature is low, secondary deformed plate contracts on cooling volume reduction, heat storing plate can be discharged thermal energy to interior by the gap at secondary deformed plate, improve room temperature, make indoor with a good hot comfort, the thermal energy of nature is made full use of by heat storing plate heat accumulation exothermic process, the use of air-conditioning system is reduced while reaching indoor good comfort, reaches energy-saving and environment-friendly effect.
Description
Technical field
The present invention relates to composite board fields, more specifically to a kind of composite board and its processing method.
Background technique
Composite board refers to the plate as made of two or more combination of materials, general single plate without
Method meets specific use demand and condition, will enhance the performance of itself by other methods.The principle of composite board
It is exactly on the basis of original, significantly the shortcomings that promotion self performance.In daily life, commonly used with metal composite
Based on plate, wood-plastic composite panel and glass reinforced plastic composite board material, the range used is also different.
External wall is generally using the composite plate with performances such as waterproof fireproofing, cracking resistance, insulation, absorbing sound and lowering noises, such as
Rock wool board, thermal coefficient is small, fire prevention, and fire-retardant, moisture-absorbing is big；Extruded polystyrene board (XPS plate) thermal coefficient is small, and heat insulation effect is good, by force
Degree is high, humidity；HD-STP ultrathin vacuum heat preservation plate, superpower heat preservation and insulation, energy-saving effect is prominent, but at high cost, and
Vacuum material is unable to on-site cutting bending.
The thermal and insulating performance of external wall directly affects indoor hot comfort, influences working efficiency and the life of people
Quality, although existing air-conditioning system is able to maintain that room temperature, in recent years studies have shown that be used for a long time air-conditioning hold
Easily cause " air conditioner disease " problem, and need to consume mass energy using air-conditioning, increases destruction of the freon to ozone layer.
Although the existing composite board for external wall has basic thermal and insulating performance, effect is unobvious,
It is unable to fully change indoor temperature using extraneous heat, improves indoor hot comfort.
Summary of the invention
1. technical problems to be solved
Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a kind of composite board and its processing sides
Method, when temperature is high, main deformed plate heat shrinkable volume reduces for it, and heat storing plate can be inhaled by the gap at main deformed plate
It receives extraneous thermal energy to be stored, reduces heat to indoor transmitting, keep indoor good hot comfort；It is low in temperature
When, secondary deformed plate contracts on cooling volume reduction, and heat storing plate can be discharged thermal energy to interior by the gap at secondary deformed plate,
Improve room temperature, make it is indoor there is a good hot comfort, by the exothermic process of heat storing plate heat accumulation by nature
Thermal energy is made full use of, and the use of air-conditioning system is reduced while reaching indoor good comfort, reaches energy-saving and environment-friendly
Effect.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of composite board, including main inner plating and secondary inner plating, the main inner plating are located at the left side of secondary inner plating, institute
It states and is bonded with heat storing plate between main inner plating and secondary inner plating, the left end of the main inner plating is bonded with multiple main frame plates and more
A main deformed plate, the main frame plate and main deformed plate are in be spaced apart, and main frame plate is Nian Jie with main deformed plate, in the pair
The right end of laminate is bonded with multiple sub-frame plates and multiple secondary deformed plates, and the sub-frame plate and secondary deformed plate are in be spaced apart,
And sub-frame plate and secondary deformed plate bonding, one end that the main frame plate and sub-frame plate are located remotely from each other are bonded with lamina rara externa,
The main deformed plate and secondary deformed plate are Nian Jie with lamina rara externa, and the present invention is when temperature is high, main deformed plate heat shrinkable body
Product reduces, and heat storing plate can be absorbed extraneous thermal energy by the gap at main deformed plate and be stored, and reduces heat to room
Interior transmitting keeps indoor good hot comfort；When temperature is low, secondary deformed plate contracts on cooling volume reduction, heat storing plate
Thermal energy can be discharged by the gap at secondary deformed plate to interior, improve room temperature, made indoor with a good heat
Comfort level is made full use of the thermal energy of nature by the exothermic process of heat storing plate heat accumulation, indoor good comfortable reaching
The use that air-conditioning system is reduced while spending, reaches energy-saving and environment-friendly effect.
Further, the heat storing plate is made of polyethylene glycol class phase transformation solid-solid heat accumulating, has excellent thermostabilization
Property and reliability, while reaching heat accumulation exothermal effect, material shape is not susceptible to change.
Further, for the polyethylene glycol class phase transformation solid-solid heat accumulating using castor oil as skeleton, polyethylene glycol is phase transformation
Material is made of methyl diphenylene diisocyanate (MDI) and hexamethylene diisocyanate (HDI) of the link group.
Further, for the main deformed plate using hard polyurethane board as basic framework, central filler has polynorbornene block
System is at hard polyurethane board has the performances such as waterproof, fire prevention, fire-retardant, high temperature resistant, and polynorbornene is by cyclopentadiene and second
Alkene by Diene-addition reactive polymeric at amorphous high polymer, be the one of which of shape-memory polymer, deformation temperature compared with
Height is heated and easily shrinks.
Further, for the secondary deformed plate using hard polyurethane board as basic framework, central filler has ethene-vinyl acetate
Copolymer (EVA) block is made, and ethylene-vinyl acetate copolymer is the one of which of shape-memory polymer, deformation temperature compared with
Low, be cooled easy contraction.
Further, one end that a pair of lamina rara externa is located remotely from each other is bonded with splash guard, for protecting inside to be not easy
Dampness.
Further, it is 1000kg/m that the main inner plating and secondary inner plating, which are all made of bulk density,3Cement-bonded wood chipboard, cement
Particieboard has good physical and mechanical property, waterproof fireproofing performance and processing performance.
Further, the main frame plate and sub-frame plate are using basalt as primary raw material, through high-temperature fusion
Rock wool board made of technique processing and fabricating, rock wool board have the characteristics that light weight, thermal coefficient are small, heat absorption is prevented fires, absorbing sound and lowering noise.
A kind of composite board, processing method are as follows:
S1, it applies glue in the one end at the both ends of heat storing plate, one end of main inner plating and secondary inner plating, by main internal layer
Plate and the secondary one end of inner plating with glue are Nian Jie with the both ends of heat storing plate respectively, are then carried out at hot pressing by hot-press equipment
It manages, cold pressing treatment is carried out by cold pressing device again after room temperature cooling, obtains plate one；
S2, it applies glue in a contralateral side of main frame plate and main deformed plate, by multiple main frame plates and main deformed plate
It is bonded to each other together in the form being spaced apart, obtains plate two；Gluing is applied in a contralateral side of sub-frame plate and secondary deformed plate
Multiple sub-frame plates and secondary deformed plate are bonded to each other together in the form being spaced apart, obtain plate three by water；
S3, it applies glue in the one end at the both ends of plate one, one end of plate two and plate three, by plate two and plate
The one end of material three with glue is Nian Jie with the both ends of plate one respectively, then carries out hot-pressing processing by hot-press equipment, and room temperature is cold
But cold pressing treatment is carried out by cold pressing device again after, obtains plate four；
S4, it applies glue at the both ends of plate four, a pair of outer layer plate is connected to the two of plate four by glue
Then end carries out hot-pressing processing by hot-press equipment, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtain plate
Five；
S5, it applies glue at the both ends of plate five, a pair of of splash guard is connected to the two of plate five by glue
Then end carries out hot-pressing processing by hot-press equipment, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtain finally multiple
Plywood material.
3. beneficial effect
Compared with the prior art, the present invention has the advantages that
(1) when temperature is high, main deformed plate heat shrinkable volume reduces this programme, and heat storing plate passes through at main deformed plate
Gap extraneous thermal energy can be absorbed stored, reduce heat to indoor transmitting, keep indoor good thermal comfort
Degree；When temperature is low, secondary deformed plate contracts on cooling volume reduction, and heat storing plate passes through the gap at secondary deformed plate can will be hot
It can discharge to interior, improve room temperature, make interior that there is a good hot comfort, pass through the exothermic mistake of heat storing plate heat accumulation
Journey makes full use of the thermal energy of nature, and the use of air-conditioning system is reduced while reaching indoor good comfort, is reached
To energy-saving and environment-friendly effect.
(2) heat storing plate is made of polyethylene glycol class phase transformation solid-solid heat accumulating, polyethylene glycol class phase transformation solid-solid heat accumulation material
For material using castor oil as skeleton, polyethylene glycol is phase-change material, passes through methyl diphenylene diisocyanate (MDI) and hexa-methylene two
Isocyanates (HDI) is made of the link group, with excellent thermal stability and reliability, is reaching heat accumulation exothermal effect
Meanwhile material shape is not susceptible to change.
(3) main deformed plate is using hard polyurethane board as basic framework, and central filler has polynorbornene block to be made, hard
Polyurethane sheet has the performances such as waterproof, fire prevention, fire-retardant, high temperature resistant, and polynorbornene is to pass through diene by cyclopentadiene and ethylene
The amorphous high polymer that addition reaction aggregates into is the one of which of shape-memory polymer, and deformation temperature is higher, is heated and easily receives
Contracting.
(4) for secondary deformed plate using hard polyurethane board as basic framework, central filler has ethylene-vinyl acetate copolymer
(EVA) block is made, and ethylene-vinyl acetate copolymer is the one of which of shape-memory polymer, and deformation temperature is lower, is cooled
Easily shrink.
Detailed description of the invention
Fig. 1 is local side structural schematic diagram of the invention；
Fig. 2 is the positive structure schematic of main deformed plate of the invention；
Fig. 3 is the positive structure schematic of secondary deformed plate of the invention.
Figure label explanation:
1 heat storing plate, 2 main inner platings, 3 secondary inner platings, 4 main frame plates, 5 main deformed plates, 6 sub-frame plates, 7 secondary deformed plates, 8
Lamina rara externa, 9 splash guards.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention；Technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description；Obviously；Described embodiments are only a part of the embodiments of the present invention；Instead of all the embodiments, it is based on
Embodiment in the present invention；It is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment；It shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instruction such as term " on ", "lower", "inner", "outside", " top/bottom end "
Orientation or positional relationship be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention and simplification retouch
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand
For indication or suggestion relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation " " is set
Be equipped with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
Embodiment 1:
Referring to Fig. 1, a kind of composite board, including main inner plating 2 and secondary inner plating 3, main inner plating 2 are located at secondary inner plating
It is 1000kg/m that 3 left side, main inner plating 2 and secondary inner plating 3, which are all made of bulk density,3Cement-bonded wood chipboard, cement-bonded wood chipboard has
Good physical and mechanical property, waterproof fireproofing performance and processing performance are bonded with heat accumulation between main inner plating 2 and secondary inner plating 3
Plate 1, the left end of main inner plating 2 are bonded with multiple main frame plates 4 and multiple main deformed plates 5, and main frame plate 4 and main deformed plate 5 are in
It is spaced apart, and main frame plate 4 is Nian Jie with main deformed plate 5, the right end of secondary inner plating 3 is bonded with multiple sub-frame plates 6 and multiple
Secondary deformed plate 7, sub-frame plate 6 and secondary deformed plate 7 are in be spaced apart, and sub-frame plate 6 and secondary deformed plate 7 are bonded, main frame plate 4
It is using basalt as primary raw material with sub-frame plate 6, through rock wool board made of high-temperature fusion technique processing and fabricating, rock wool
Plate has the characteristics that light weight, thermal coefficient are small, heat absorption is prevented fires, absorbing sound and lowering noise, and main frame plate 4 and sub-frame plate 6 are located remotely from each other
One end be bonded with lamina rara externa 8, main deformed plate 5 and secondary deformed plate 7 are Nian Jie with lamina rara externa 8, and a pair of outer layer plate 8 is located remotely from each other
One end be bonded with splash guard 9, for protecting internal not moisture-sensitive.
Heat storing plate 1 is made of polyethylene glycol class phase transformation solid-solid heat accumulating, polyethylene glycol class phase transformation solid-solid heat accumulating
Using castor oil as skeleton, polyethylene glycol is phase-change material, different by methyl diphenylene diisocyanate (MDI) and hexa-methylene two
Cyanate (HDI) is made of the link group, with excellent thermal stability and reliability, is reaching the same of heat accumulation exothermal effect
When, material shape is not susceptible to change.
Referring to Fig. 2, main deformed plate 5 is using hard polyurethane board as basic framework, central filler has polynorbornene block
It is made, hard polyurethane board has the performances such as waterproof, fire prevention, fire-retardant, high temperature resistant, and polynorbornene is by cyclopentadiene and ethylene
By Diene-addition reactive polymeric at amorphous high polymer, be the one of which of shape-memory polymer, deformation temperature is higher,
It is heated easily to shrink.
Referring to Fig. 3, secondary deformed plate 7, using hard polyurethane board as basic framework, central filler has ethene-vinyl acetate total
Polymers (EVA) block is made, and ethylene-vinyl acetate copolymer is the one of which of shape-memory polymer, and deformation temperature is lower,
Be cooled easy contraction.
A kind of composite board, processing method are as follows:
S1, it applies glue, will lead in the one end at the both ends of heat storing plate 1, one end of main inner plating 2 and secondary inner plating 3
Inner plating 2 and the secondary one end of inner plating 3 with glue are Nian Jie with the both ends of heat storing plate 1 respectively, are then carried out by hot-press equipment
Hot-pressing processing carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtains plate one；
S2, it applies glue in a contralateral side of main frame plate 4 and main deformed plate 5, by multiple main frame plates 4 and main transformer shape
Plate 5 is bonded to each other together in the form being spaced apart, and obtains plate two；It is applied in a contralateral side of sub-frame plate 6 and secondary deformed plate 7
Multiple sub-frame plates 6 and secondary deformed plate 7 are bonded to each other together in the form being spaced apart, obtain plate three by upper glue；
S3, it applies glue in the one end at the both ends of plate one, one end of plate two and plate three, by plate two and plate
The one end of material three with glue is Nian Jie with the both ends of plate one respectively, then carries out hot-pressing processing by hot-press equipment, and room temperature is cold
But cold pressing treatment is carried out by cold pressing device again after, obtains plate four；
S4, it applies glue at the both ends of plate four, a pair of outer layer plate 8 is connected to the two of plate four by glue
Then end carries out hot-pressing processing by hot-press equipment, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtain plate
Five；
S5, it applies glue at the both ends of plate five, a pair of of splash guard 9 is connected to the two of plate five by glue
Then end carries out hot-pressing processing by hot-press equipment, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtain finally multiple
Plywood material.
The present invention is reduced when temperature is high by main 5 heat shrinkable volume of deformed plate, and secondary deformed plate 7 is in original
State, heat storing plate 1 can be absorbed extraneous thermal energy by the gap at main deformed plate 5 and stored, and reduce heat to room
Interior transmitting keeps indoor good hot comfort；When temperature is low, main deformed plate 5 expands to the cold restores reset condition, secondary
Deformed plate 7 contracts on cooling volume reduction, and thermal energy can be discharged by the gap at secondary deformed plate 7 to interior, be improved by heat storing plate 1
Room temperature, make it is indoor there is a good hot comfort, by the exothermic process of 1 heat accumulation of heat storing plate by the thermal energy of nature
It is made full use of, the use of air-conditioning system is reduced while reaching indoor good comfort, reaches energy-saving and environment-friendly effect.
It is described above；It is merely preferred embodiments of the present invention；But scope of protection of the present invention is not limited thereto；
Anyone skilled in the art is in the technical scope disclosed by the present invention；According to the technique and scheme of the present invention and its
It improves design and is subject to equivalent substitution or change；It should be covered by the scope of protection of the present invention.
Claims (9)
1. a kind of composite board, including main inner plating (2) and secondary inner plating (3), the main inner plating (2) are located at secondary inner plating
(3) left side, it is characterised in that: be bonded with heat storing plate (1) between the main inner plating (2) and secondary inner plating (3), in the master
The left end of laminate (2) is bonded with multiple main frame plates (4) and multiple main deformed plates (5), the main frame plate (4) and main deformed plate
It (5) is in be spaced apart, and main frame plate (4) is Nian Jie with main deformed plate (5), the right end of the pair inner plating (3) is bonded with multiple
Sub-frame plate (6) and multiple secondary deformed plates (7), the sub-frame plate (6) and secondary deformed plate (7) are in be spaced apart, and sub-frame
One end that plate (6) and secondary deformed plate (7) bonding, the main frame plate (4) and sub-frame plate (6) are located remotely from each other is bonded with outer layer
Plate (8), the main deformed plate (5) and secondary deformed plate (7) are Nian Jie with lamina rara externa (8).
2. a kind of composite board according to claim 1, it is characterised in that: the heat storing plate (1) is by polyethylene glycols phase
Become solid-solid heat accumulating to be made.
3. a kind of composite board according to claim 2, it is characterised in that: the polyethylene glycol class phase transformation solid-solid heat accumulation
For material using castor oil as skeleton, polyethylene glycol is phase-change material, passes through methyl diphenylene diisocyanate (MDI) and hexa-methylene
Diisocyanate (HDI) is made of the link group.
4. a kind of composite board according to claim 1, it is characterised in that: the main deformed plate (5) is with hard polyaminoester
Plate is basic framework, and central filler has polynorbornene block to be made.
5. a kind of composite board according to claim 1, it is characterised in that: the pair deformed plate (7) is with hard polyaminoester
Plate is basic framework, and central filler has ethylene-vinyl acetate copolymer (EVA) block to be made.
6. a kind of composite board according to claim 1, it is characterised in that: what a pair of lamina rara externa (8) was located remotely from each other
One end is bonded with splash guard (9).
7. a kind of composite board according to claim 1, it is characterised in that: the main inner plating (2) and secondary inner plating (3)
Being all made of bulk density is 1000kg/m3Cement-bonded wood chipboard.
8. a kind of composite board according to claim 1, it is characterised in that: the main frame plate (4) and sub-frame plate (6)
It is using basalt as primary raw material, through rock wool board made of high-temperature fusion technique processing and fabricating.
9. a kind of composite board according to claim 1, which is characterized in that its processing method are as follows:
S1, it applies glue in the one end at the both ends of heat storing plate (1), one end of main inner plating (2) and secondary inner plating (3), it will
Main inner plating (2) and the secondary one end of inner plating (3) with glue are Nian Jie with the both ends of heat storing plate (1) respectively, then pass through hot pressing
Equipment carries out hot-pressing processing, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtains plate one；
S2, it applies glue in a contralateral side of main frame plate (4) and main deformed plate (5), by multiple main frame plates (4) and main transformer
Shape plate (5) is bonded to each other together in the form being spaced apart, and obtains plate two；In a pair of sub-frame plate (6) and secondary deformed plate (7)
Side applies glue, and multiple sub-frame plates (6) and secondary deformed plate (7) are bonded to each other together in the form being spaced apart, are obtained
Plate three；
S3, it applies glue in the one end at the both ends of plate one, one end of plate two and plate three, by plate two and plate three
One end with glue is Nian Jie with the both ends of plate one respectively, then hot-pressing processing is carried out by hot-press equipment, after room temperature cooling
Cold pressing treatment is carried out by cold pressing device again, obtains plate four；
S4, it applies glue at the both ends of plate four, a pair of outer layer plate (8) is connected to the two of plate four by glue
Then end carries out hot-pressing processing by hot-press equipment, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtain plate
Five；
S5, it applies glue at the both ends of plate five, a pair of of splash guard (9) is connected to the two of plate five by glue
Then end carries out hot-pressing processing by hot-press equipment, carries out cold pressing treatment by cold pressing device again after room temperature cooling, obtain finally multiple
Plywood material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020083.3A CN109703127B (en) | 2019-01-09 | 2019-01-09 | Composite board and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910020083.3A CN109703127B (en) | 2019-01-09 | 2019-01-09 | Composite board and processing method thereof |
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| CN109703127A true CN109703127A (en) | 2019-05-03 |
| CN109703127B CN109703127B (en) | 2021-05-14 |
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ID=66260998
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164770A (en) * | 2006-10-20 | 2008-04-23 | 香港理工大学 | Bidirectional shape memory polymer composite material and preparation method thereof |
| CN201702825U (en) * | 2010-04-21 | 2011-01-12 | 南京汉青竹业有限公司 | Foaming composite board |
| CN204081251U (en) * | 2014-07-25 | 2015-01-07 | 烟台新科钢结构有限公司 | A kind of follow-on combined wall board |
| CN107163547A (en) * | 2017-05-17 | 2017-09-15 | 北京大学 | A kind of solid-solid phase change thermal interfacial material and preparation method thereof |
| CN109015948A (en) * | 2018-09-25 | 2018-12-18 | 嘉善欣达胶业有限公司 | A kind of composite board and its processing method |
-
2019
- 2019-01-09 CN CN201910020083.3A patent/CN109703127B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164770A (en) * | 2006-10-20 | 2008-04-23 | 香港理工大学 | Bidirectional shape memory polymer composite material and preparation method thereof |
| CN201702825U (en) * | 2010-04-21 | 2011-01-12 | 南京汉青竹业有限公司 | Foaming composite board |
| CN204081251U (en) * | 2014-07-25 | 2015-01-07 | 烟台新科钢结构有限公司 | A kind of follow-on combined wall board |
| CN107163547A (en) * | 2017-05-17 | 2017-09-15 | 北京大学 | A kind of solid-solid phase change thermal interfacial material and preparation method thereof |
| CN109015948A (en) * | 2018-09-25 | 2018-12-18 | 嘉善欣达胶业有限公司 | A kind of composite board and its processing method |
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| CN109703127B (en) | 2021-05-14 |
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Effective date of registration: 20210427 Address after: 311100 No.9 Xinye Road, Qiaosi street, Yuhang District, Hangzhou City, Zhejiang Province Applicant after: ZHEJIANG TIANHE DEARSUN INDUSTRIAL GROUP Co.,Ltd. Address before: 164300 Shuangshan Town No. 16, Nenjiang County, Heihe City, Heilongjiang Province Applicant before: Yu Honghai |
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