CN107662324A - A kind of sheet extrusion production technology - Google Patents
A kind of sheet extrusion production technology Download PDFInfo
- Publication number
- CN107662324A CN107662324A CN201710999033.5A CN201710999033A CN107662324A CN 107662324 A CN107662324 A CN 107662324A CN 201710999033 A CN201710999033 A CN 201710999033A CN 107662324 A CN107662324 A CN 107662324A
- Authority
- CN
- China
- Prior art keywords
- color masterbatch
- raw material
- extrusion
- machine
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001125 extrusion Methods 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 34
- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 239000004595 color masterbatch Substances 0.000 claims abstract description 62
- 239000004793 Polystyrene Substances 0.000 claims abstract description 54
- 239000002994 raw material Substances 0.000 claims abstract description 50
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000010257 thawing Methods 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims description 38
- 238000013016 damping Methods 0.000 claims description 14
- 229920002223 polystyrene Polymers 0.000 claims description 9
- 230000004927 fusion Effects 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 5
- 239000012745 toughening agent Substances 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 6
- 229920006389 polyphenyl polymer Polymers 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/24—Calendering
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/26—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length in several steps
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
-
- 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
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
- B29C2043/5816—Measuring, controlling or regulating temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of sheet extrusion production technology, it is related to polystyrene (PS) raw material sheet material production technical field, solve the problems, such as that polystyrene (PS) raw material and color masterbatch expect that extrusion efficiency is low from above, color masterbatch avoids the need for carrying out color masterbatch and polystyrene (PS) raw material premix using screw machine feeding, match somebody with somebody ratio by set that color masterbatch feeding speed reaches color masterbatch and raw material, color masterbatch and raw material are persistently injected into single screw extrusion machine, the raw material sent and color masterbatch are carried out thawing mixing by main-machine screw, extrusion molding again, so improve the production efficiency for expecting extrusion, shorten the production cycle, and then shorten the whole sheet production cycle, improve the production efficiency of whole sheet material.
Description
Technical field
The invention belongs to sheet production technical field, more particularly to a kind of sheet extrusion production technology.
Background technology
Sheet material made of polystyrene (PS) occupies increasingly critical positions in the life of people, and this sheet material has saturating
The features such as light rate height, good toughness, easy stacking.In existing production technology, typically polystyrene (PS) and color masterbatch are weighed
Premixed, stirred in batch mixer afterwards, then the compound being stirred is injected in extruder, such efficiency is low, production week
Phase is grown.
The content of the invention
Produced to solve to exist in above-mentioned existing sheet production technology the technical process first weighed, mix, stirred in extruding
The problems such as raw efficiency is low, the production cycle is long, the technical solution adopted by the present invention is as follows：
A kind of sheet extrusion production technology, is comprised the following steps that：
The first step：Feeding injects appropriate polystyrene (PS) raw material in the funnel of single screw extrusion machine, and color masterbatch is used
Screw machine is sent in single screw extrusion machine, and the feeding speed of color masterbatch is by color masterbatch and the part by weight of polystyrene (PS) raw material
It is controlled, the part by weight of the color masterbatch and polystyrene (PS) raw material is 3%；
Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polyphenyl by fusion main-machine screw
Ethene (PS) raw material melt temperature is 188-197 DEG C, and color masterbatch melt temperature is 185-200 DEG C；
3rd step：Single screw extrusion machine is first preheating to 185-200 DEG C before extruding extruding, the extruding speed of single screw extrusion machine
Degree control is at 445-455 kgs/hour, and the speed control of extrusion sheet is at 3.5-4.5 ms/min；
4th step：It is rolled over damping roller temperature controller, two roller hauling machines, completes on three-roller calendar, extrusion sheet
It is surface-treated on three-roller calendar, three-roller calendar is first preheating to 75-85 DEG C before rolling, three-roller calendar during rolling
Temperature control at 70-80 DEG C, rolling speed is 3.5-4.5 ms/min, and damping roller temperature controller is by recirculated water to three roll-ins
The rolling temperatures of ray machine are controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed and rolling speed are essentially identical.
Further, addition toughener can be selected according to the strength conditions for squeezing out sheet material in the first step, adds toughness reinforcing
The part by weight of agent and polystyrene (PS) raw material is 0.2%.
Further, the sheet material of extrusion carries out online recycling with edge recycling machine after rolling to edge clout.
Further, the piece timber-used plate shearing machine for cutting edge clout cut by product size.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
Color masterbatch avoids the need for carrying out color masterbatch and polystyrene (PS) raw material premix using screw machine feeding, passes through setting
What color masterbatch feeding speed reached color masterbatch and raw material matches somebody with somebody ratio, and color masterbatch and raw material are persistently injected into single screw extrusion machine.
The raw material sent and color masterbatch are carried out thawing mixing, then extrusion molding by main-machine screw.So improve and expect extrusion
Production efficiency, shorten the production cycle, and then shorten the whole sheet production cycle, improve overall production efficiency.
Brief description of the drawings
Fig. 1 is sheet extrusion production technological process.
Embodiment
In order to which those skilled in the art are better understood from the present invention, below in conjunction with the accompanying drawings with following examples to the present invention
It is described in further detail.
Embodiment 1：
A kind of sheet extrusion production technology, is comprised the following steps that：
As shown in figure 1, the first step：Feeding injects appropriate polystyrene (PS) raw material in the funnel of single screw extrusion machine
Interior, color masterbatch is sent in single screw extrusion machine with screw machine, and the feeding speed of color masterbatch is former with polystyrene (PS) by color masterbatch
The part by weight of material is controlled, and the part by weight of the color masterbatch and polystyrene (PS) raw material is 10%；
Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polyphenyl by fusion main-machine screw
Ethene (PS) raw material melt temperature is arranged to 197 DEG C, and color masterbatch melt temperature is arranged to 200 DEG C；
3rd step：Single screw extrusion machine is first preheating to 200 DEG C before extruding extruding, the extrusion speed control of single screw extrusion machine
System is at 455 kgs/hour, and the speed control of extrusion sheet is at 4.5 ms/min；
4th step：It is rolled over damping roller temperature controller, two roller hauling machines, completes on three-roller calendar, extrusion sheet
It is surface-treated on three-roller calendar, three-roller calendar is first preheating to 85 DEG C before rolling, three-roller calendar during rolling
Temperature control is at 80 DEG C, and rolling speed is 4.5/ minute, and damping roller temperature controller passes through rolling of the recirculated water to three-roller calendar
Temperature is controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed and rolling speed are essentially identical.
Further, addition toughener can be selected according to the strength conditions for squeezing out sheet material in the first step, adds toughness reinforcing
The part by weight of agent and polystyrene (PS) raw material is 0.2%.
Further, the sheet material of extrusion carries out online recycling to edge clout after rolling with edge recycling machine, and can be with
Reused, saved cost.
Further, the piece timber-used plate shearing machine for cutting edge clout cut by product size.
Embodiment 2：
A kind of sheet extrusion production technology, is comprised the following steps that：
As shown in figure 1, the first step：Feeding injects appropriate polystyrene (PS) raw material in the funnel of single screw extrusion machine
Interior, color masterbatch is sent in single screw extrusion machine with screw machine, and the feeding speed of color masterbatch is former with polystyrene (PS) by color masterbatch
The part by weight of material is controlled, and the part by weight of the color masterbatch and polystyrene (PS) raw material is 3%；
Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polyphenyl by fusion main-machine screw
Ethene (PS) raw material melt temperature is arranged to 188 DEG C, and color masterbatch melt temperature is arranged to 185 DEG C；
3rd step：Single screw extrusion machine is first preheating to 185 DEG C before extruding extruding, the extrusion speed control of single screw extrusion machine
System is at 445 kgs/hour, and the speed control of extrusion sheet is at 3.5 ms/min；
4th step：It is rolled over damping roller temperature controller, two roller hauling machines, completes on three-roller calendar, extrusion sheet
It is surface-treated on three-roller calendar, three-roller calendar is first preheating to 75 DEG C before rolling, three-roller calendar during rolling
Temperature control is at 70 DEG C, and rolling speed is 3.5/ minute, and damping roller temperature controller passes through rolling of the recirculated water to three-roller calendar
Temperature is controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed and rolling speed are essentially identical.
Embodiment 3：
As shown in figure 1, a kind of sheet extrusion production technology, is comprised the following steps that：
The first step：Feeding injects appropriate polystyrene (PS) raw material in the funnel of single screw extrusion machine, and color masterbatch is used
Screw machine is sent in single screw extrusion machine, and the feeding speed of color masterbatch is by color masterbatch and the part by weight of polystyrene (PS) raw material
It is controlled, the part by weight of the color masterbatch and polystyrene (PS) raw material is 5%；
Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polyphenyl by fusion main-machine screw
Ethene (PS) raw material melt temperature is arranged to 190 DEG C, and color masterbatch melt temperature is arranged to 192 DEG C；
3rd step：Single screw extrusion machine is first preheating to 195 DEG C before extruding extruding, the extrusion speed control of single screw extrusion machine
System is at 450 kgs/hour, and the speed control of extrusion sheet is at 4 ms/min；
4th step：It is rolled over damping roller temperature controller, two roller hauling machines, completes on three-roller calendar, extrusion sheet
It is surface-treated on three-roller calendar, three-roller calendar is first preheating to 80 DEG C before rolling, three-roller calendar during rolling
Temperature control is at 80 DEG C, and rolling speed is 4/ minute, and damping roller temperature controller passes through rolling temperature of the recirculated water to three-roller calendar
Degree is controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed and rolling speed are essentially identical.
Embodiment 4：
As shown in figure 1, a kind of sheet extrusion production technology, is comprised the following steps that：
The first step：Feeding injects appropriate polystyrene (PS) raw material in the funnel of single screw extrusion machine, and color masterbatch is used
Screw machine is sent in single screw extrusion machine, and the feeding speed of color masterbatch is by color masterbatch and the part by weight of polystyrene (PS) raw material
It is controlled, the part by weight of the color masterbatch and polystyrene (PS) raw material is 6%；
Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polyphenyl by fusion main-machine screw
Ethene (PS) raw material melt temperature is arranged to 188 DEG C, and color masterbatch melt temperature is arranged to 188 DEG C；
3rd step：Single screw extrusion machine is first preheating to 188 DEG C before extruding extruding, the extrusion speed control of single screw extrusion machine
System is at 450 kgs/hour, and the speed control of extrusion sheet is at 4 ms/min；
4th step：It is rolled over damping roller temperature controller, two roller hauling machines, completes on three-roller calendar, extrusion sheet
It is surface-treated on three-roller calendar, three-roller calendar is first preheating to 80 DEG C before rolling, three-roller calendar during rolling
Temperature control is at 80 DEG C, and rolling speed is 4/ minute, and damping roller temperature controller passes through rolling temperature of the recirculated water to three-roller calendar
Degree is controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed and rolling speed are essentially identical.
Embodiment 5：
As shown in figure 1, a kind of sheet extrusion production technology, is comprised the following steps that：
The first step：Feeding injects appropriate polystyrene (PS) raw material in the funnel of single screw extrusion machine, and color masterbatch is used
Screw machine is sent in single screw extrusion machine, and the feeding speed of color masterbatch is by color masterbatch and the part by weight of polystyrene (PS) raw material
It is controlled, the part by weight of the color masterbatch and polystyrene (PS) raw material is 4.5%；
Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polyphenyl by fusion main-machine screw
Ethene (PS) raw material melt temperature is arranged to 197 DEG C, and color masterbatch melt temperature is arranged to 196 DEG C；
3rd step：Single screw extrusion machine is first preheating to 195 DEG C before extruding extruding, the extrusion speed control of single screw extrusion machine
System is at 448 kgs/hour, and the speed control of extrusion sheet is at 4.2 ms/min；
4th step：It is rolled over damping roller temperature controller, two roller hauling machines, completes on three-roller calendar, extrusion sheet
It is surface-treated on three-roller calendar, three-roller calendar is first preheating to 82 DEG C before rolling, three-roller calendar during rolling
Temperature control is at 82 DEG C, and rolling speed is 4.2/ minute, and damping roller temperature controller passes through rolling of the recirculated water to three-roller calendar
Temperature is controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed and rolling speed are essentially identical.
In 5 embodiments of the above, color masterbatch avoids the need for carrying out color masterbatch and polystyrene using screw machine feeding
(PS) raw material premix, ratio is matched somebody with somebody by set that color masterbatch feeding speed reaches color masterbatch and raw material, color masterbatch and raw material continue
It is injected into single screw extrusion machine.The raw material sent and color masterbatch are carried out thawing mixing, then extrusion molding by main-machine screw.So
The production efficiency for expecting extrusion is improved, shortens the production cycle, and then shortens the whole sheet production cycle, is improved
The production efficiency of whole sheet material.
Described above, only presently preferred embodiments of the present invention is not intended to limit the invention, patent protection model of the invention
Enclose and be defined by claims, the equivalent structure change that every specification and accompanying drawing content with the present invention is made, similarly
It should include within the scope of the present invention.
Claims (5)
- A kind of 1. sheet extrusion production technology, it is characterised in that：Comprise the following steps that：The first step：Feeding injects polystyrene (PS) raw material in the funnel of single screw extrusion machine, and color masterbatch is sent to screw machine In single screw extrusion machine, the feeding speed of color masterbatch is controlled by the part by weight of color masterbatch and polystyrene (PS) raw material to be made The part by weight for obtaining color masterbatch and polystyrene (PS) raw material is 3-10%；Second step：The polystyrene sent (PS) raw material and color masterbatch are carried out thawing mixing, polystyrene by fusion main-machine screw (PS) raw material melt temperature is 188-197 DEG C, and color masterbatch melt temperature is 185-200 DEG C；3rd step：Single screw extrusion machine is first preheating to 185-200 DEG C before extruding extruding, the extrusion speed of single screw extrusion machine Control is at 445-455 kgs/hour, and the speed control of extrusion sheet is at 3.5-4.5 ms/min；4th step：The sheet material of rolling extrusion completes rolling on three-roller calendar.
- 2. a kind of sheet extrusion production technology according to claim 1, it is characterised in that can be according to extruding in the first step Go out the strength conditions selection addition toughener of sheet material, the part by weight for adding toughener and polystyrene (PS) raw material is 0.2%.
- A kind of 3. sheet extrusion production technology according to claim 1, it is characterised in that the sheet material after being rolled in the 4th step Edge clout is reclaimed with edge recycling machine.
- 4. a kind of sheet extrusion production technology according to claim 3, it is characterised in that cut edge clout in the 4th step Piece timber-used plate shearing machine cut by product size.
- 5. a kind of sheet extrusion production technology according to claim 1, it is characterised in that sheet material is rolled in the 4th step and is also related to And damping roller temperature controller and two roller hauling machines, three-roller calendar is first preheating to 75-85 DEG C before rolling, three-roll press-polishing during rolling The temperature control of machine is at 70-80 DEG C, and rolling speed is 3.5-4.5 ms/min, and the temperature of three-roller calendar passes through damping roller temperature control Machine processed is controlled, and two roller hauling machines mainly ensure to walk material, and hauling speed is identical with rolling speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999033.5A CN107662324A (en) | 2017-10-23 | 2017-10-23 | A kind of sheet extrusion production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999033.5A CN107662324A (en) | 2017-10-23 | 2017-10-23 | A kind of sheet extrusion production technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107662324A true CN107662324A (en) | 2018-02-06 |
Family
ID=61098411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710999033.5A Pending CN107662324A (en) | 2017-10-23 | 2017-10-23 | A kind of sheet extrusion production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107662324A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112706434A (en) * | 2020-12-30 | 2021-04-27 | 浙江中盛新材料股份有限公司 | 3D grating sheet production equipment and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204054566U (en) * | 2014-06-06 | 2014-12-31 | 泉州讯捷计算机服务有限公司 | Single screw extruder |
| CN106633450A (en) * | 2015-08-15 | 2017-05-10 | 王福民 | Ps diffusion plate and preparation method thereof |
-
2017
- 2017-10-23 CN CN201710999033.5A patent/CN107662324A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204054566U (en) * | 2014-06-06 | 2014-12-31 | 泉州讯捷计算机服务有限公司 | Single screw extruder |
| CN106633450A (en) * | 2015-08-15 | 2017-05-10 | 王福民 | Ps diffusion plate and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112706434A (en) * | 2020-12-30 | 2021-04-27 | 浙江中盛新材料股份有限公司 | 3D grating sheet production equipment and preparation method thereof |
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Application publication date: 20180206 |