CN117417646A - Bamboo fiber sheet and preparation method thereof - Google Patents
Bamboo fiber sheet and preparation method thereof Download PDFInfo
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- CN117417646A CN117417646A CN202311356845.XA CN202311356845A CN117417646A CN 117417646 A CN117417646 A CN 117417646A CN 202311356845 A CN202311356845 A CN 202311356845A CN 117417646 A CN117417646 A CN 117417646A
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- Prior art keywords
- bamboo fiber
- mixing
- fiber sheet
- agent
- biological enzyme
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- 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.)
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Links
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 52
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 52
- 241001330002 Bambuseae Species 0.000 title claims abstract description 52
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 52
- 239000011425 bamboo Substances 0.000 title claims abstract description 52
- 239000000835 fiber Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 16
- 108090000790 Enzymes Proteins 0.000 claims abstract description 14
- 102000004190 Enzymes Human genes 0.000 claims abstract description 14
- 238000007731 hot pressing Methods 0.000 claims abstract description 11
- 239000004743 Polypropylene Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000000839 emulsion Substances 0.000 claims abstract description 10
- -1 polypropylene Polymers 0.000 claims abstract description 10
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 10
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000008367 deionised water Substances 0.000 claims abstract description 5
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 5
- 238000007873 sieving Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 14
- 229940088598 enzyme Drugs 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 108010059892 Cellulase Proteins 0.000 claims description 2
- 101710121765 Endo-1,4-beta-xylanase Proteins 0.000 claims description 2
- 229940106157 cellulase Drugs 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 abstract description 9
- 239000008107 starch Substances 0.000 abstract description 9
- 235000019698 starch Nutrition 0.000 abstract description 9
- 230000006872 improvement Effects 0.000 description 4
- ZIALXKMBHWELGF-UHFFFAOYSA-N [Na].[Cu] Chemical compound [Na].[Cu] ZIALXKMBHWELGF-UHFFFAOYSA-N 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 2
- 229930002875 chlorophyll Natural products 0.000 description 2
- 235000019804 chlorophyll Nutrition 0.000 description 2
- ATNHDLDRLWWWCB-AENOIHSZSA-M chlorophyll a Chemical compound C1([C@@H](C(=O)OC)C(=O)C2=C3C)=C2N2C3=CC(C(CC)=C3C)=[N+]4C3=CC3=C(C=C)C(C)=C5N3[Mg-2]42[N+]2=C1[C@@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)[C@H](C)C2=C5 ATNHDLDRLWWWCB-AENOIHSZSA-M 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 238000005285 chemical preparation method Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction 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
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
-
- 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
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2311/00—Use of natural products or their composites, not provided for in groups B29K2201/00 - B29K2309/00, as reinforcement
- B29K2311/10—Natural fibres, e.g. wool or cotton
-
- 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
-
- 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
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
-
- 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
- C08J2489/00—Characterised by the use of proteins; Derivatives thereof
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to the technical field of bamboo fibers, and discloses a bamboo fiber sheet and a preparation method thereof, wherein the bamboo fiber sheet comprises 75-80% of bamboo fiber grain, 20-25% of polypropylene resin, 2-5% of defoaming agent, 3-5% of anti-reflection agent, 3-5% of biological enzyme solution and 4-6% of stabilizing agent; sieving the bamboo fiber grain and then taking all the raw materials according to weight for standby, putting the bamboo fiber grain and the polypropylene resin into a mixer for mixing treatment, putting the mixed materials into a mixer, adding deionized water for mixing to obtain emulsion, pouring the emulsion into an internal mixer, adding a defoaming agent, an anti-reflection agent, a compatilizer, a biological enzyme solution and a stabilizer for banburying, cooling, carrying out hot pressing treatment on the treated materials to obtain bamboo fiber sheets, and adopting a physical preparation method to prepare the bamboo fiber sheets not only corresponds to the green and environment-friendly production and processing concept, but also ensures that the produced fully-degradable starch tableware is safer and more sanitary when used.
Description
Technical Field
The invention relates to the technical field of bamboo fibers, in particular to a bamboo fiber sheet and a preparation method thereof.
Background
Bamboo fiber is a cellulose fiber extracted from naturally grown bamboo. The bamboo fiber has the characteristics of good air permeability, instant water absorption, strong wear resistance, good dyeing property and the like, and also has the functions of natural antibiosis, bacteriostasis, mite removal, deodorization, ultraviolet resistance and the like. Bamboo fibers have been widely used in the fields of mattresses, sofas, automotive interiors, textile clothing, household textiles, medical and health, environmental protection, packaging materials, and the like.
At present, the most common in the life of people is disposable plastic packaging, which brings convenience to the life of people, but also causes great pollution to the environment, so that the environment-friendly packaging is generated. The fully degradable starch tableware is produced with starch as main material, additive and small amount of herbal fiber and through heating and foaming to form, and the fully degradable starch tableware may be biodegraded naturally after being used and discarded without environmental pollution. The production of the fully-degradable starch tableware needs to use bamboo fiber sheets and the like as raw materials, and the existing bamboo fiber sheets are mostly prepared by adopting a chemical method, which is obviously not consistent with the environment-friendly preparation and production process of the fully-degradable starch tableware, so that the bamboo fiber sheet preparation method is provided.
Disclosure of Invention
The invention provides a bamboo fiber sheet and a preparation method thereof, aiming at solving the problem that the chemical preparation method of the existing bamboo fiber sheet is inconsistent with the green environment-friendly production preparation concept of fully-degradable starch tableware in the background art.
The invention is realized by adopting the following technical scheme: the bamboo fiber sheet is characterized by comprising the following components in parts by weight:
75-80% of bamboo fiber grain, 20-25% of polypropylene resin, 2-5% of defoaming agent, 3-5% of anti-reflection agent, 3-5% of biological enzyme solution and 4-6% of stabilizing agent.
As a further improvement of the scheme, the biological enzyme used for the biological enzyme degumming is one or more of xylanase, pectase and cellulase.
A method for preparing a bamboo fiber sheet, which is characterized by comprising the following steps:
s1, preparing materials: sieving bamboo fiber granules, and weighing all raw materials for standby;
s2, mixing: putting the bamboo fiber grain-extracted and polypropylene resin into a mixing machine for mixing treatment;
s3, refining: putting the mixed materials into a mixing mill, and then adding deionized water for mixing to obtain emulsion;
s4, a finished product: pouring the emulsion into an internal mixer, adding a defoaming agent, an anti-reflection agent, a compatilizer, a biological enzyme solution and a stabilizing agent for banburying, and then cooling;
s5, hot press molding: and carrying out hot pressing treatment on the treated material to obtain the bamboo fiber sheet.
As a further improvement of the scheme, in the step S2, the mixing speed is 180-300r/min, the mixing time is 5-10min, and the mixing temperature is 40-60 ℃.
As a further improvement of the scheme, in the step S3, the stirring time of the mixing machine is 40-60min, and the stirring temperature is 120-135 ℃.
As a further improvement of the scheme, the temperature required for hot press molding is 180 ℃, the pressure required for hot press molding is 2mpa, and the time required for hot press molding is 30min.
Compared with the prior art, the invention has the beneficial effects that:
1. the bamboo fiber sheet is prepared by a physical method, and effectively meets the environment-friendly production and processing concept.
2. The bamboo fiber prepared by the physical method is the bamboo fiber, and the bamboo fiber has strong antibacterial and bactericidal effects, so that the produced fully-degradable starch tableware is safer and more sanitary to use, and meanwhile, the bamboo fiber also contains sodium copper chlorophyll, and the sodium copper chlorophyll has strong deodorizing property, so that the environmental protection effect of the fully-degradable starch tableware after being discarded is improved.
Drawings
FIG. 1 is a flow chart of a method for preparing a bamboo fiber sheet of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Example 1:
referring to fig. 1, a bamboo fiber sheet of the present embodiment includes the following components in weight ratio:
75kg of bamboo fiber grain, 20kg of polypropylene resin, 2kg of defoamer, 3kg of antireflective agent, 3kg of biological enzyme solution and 4kg of stabilizer.
A method for preparing bamboo fiber sheet, comprising the following steps:
s1, preparing materials: sieving bamboo fiber granules, and weighing all raw materials for standby;
s2, mixing: mixing bamboo fiber grain-extracted and polypropylene resin in a mixer at a mixing speed of 180r/min for 5min at 40 ℃;
s3, refining: putting the mixed materials into a mixer, adding deionized water for mixing to obtain emulsion materials, wherein the mixing time of the mixer is 40min, and the mixing temperature is 120 ℃;
s4, a finished product: pouring the emulsion into an internal mixer, adding a defoaming agent, an anti-reflection agent, a compatilizer, a biological enzyme solution and a stabilizing agent for banburying, and then cooling;
s5, hot press molding: and carrying out hot-pressing treatment on the treated material to obtain the bamboo fiber sheet, wherein the temperature required by hot-pressing molding is 180 ℃, the pressure required by hot-pressing molding is 2mpa, and the time required by hot-pressing molding is 30min.
Example 2:
referring to fig. 1, a bamboo fiber sheet of the present embodiment includes the following components in weight ratio:
80kg of bamboo fiber grain, 25kg of polypropylene resin, 5kg of defoamer, 5kg of antireflective agent, 5kg of biological enzyme solution and 6kg of stabilizer.
A method for preparing bamboo fiber sheet, comprising the following steps:
s1, preparing materials: sieving bamboo fiber granules, and weighing all raw materials for standby;
s2, mixing: mixing bamboo fiber grain-extracted and polypropylene resin in a mixer at a mixing speed of 300r/min for 10min at 60 ℃;
s3, refining: putting the mixed materials into a mixer, adding deionized water for mixing to obtain emulsion, wherein the mixing time of the mixer is 60min, and the mixing temperature is 135 ℃;
s4, a finished product: pouring the emulsion into an internal mixer, adding a defoaming agent, an anti-reflection agent, a compatilizer, a biological enzyme solution and a stabilizing agent for banburying, and then cooling;
s5, hot press molding: and carrying out hot-pressing treatment on the treated material to obtain the bamboo fiber sheet, wherein the temperature required by hot-pressing molding is 180 ℃, the pressure required by hot-pressing molding is 2mpa, and the time required by hot-pressing molding is 30min.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (6)
1. The bamboo fiber sheet is characterized by comprising the following components in parts by weight:
75-80% of bamboo fiber grain, 20-25% of polypropylene resin, 2-5% of defoaming agent, 3-5% of anti-reflection agent, 3-5% of biological enzyme solution and 4-6% of stabilizing agent.
2. The bamboo fiber sheet according to claim 1, wherein the biological enzyme used for the biological enzyme degumming is one or more of xylanase, pectase and cellulase.
3. A method for producing a bamboo fiber sheet according to any one of claims 1 to 2, comprising the steps of: :
s1, preparing materials: sieving bamboo fiber granules, and weighing all raw materials for standby;
s2, mixing: putting the bamboo fiber grain-extracted and polypropylene resin into a mixing machine for mixing treatment;
s3, refining: putting the mixed materials into a mixing mill, and then adding deionized water for mixing to obtain emulsion;
s4, a finished product: pouring the emulsion into an internal mixer, adding a defoaming agent, an anti-reflection agent, a compatilizer, a biological enzyme solution and a stabilizing agent for banburying, and then cooling;
s5, hot press molding: and carrying out hot pressing treatment on the treated material to obtain the bamboo fiber sheet.
4. The method according to claim 1, wherein the mixing speed in the step S2 is 180-300r/min, the mixing time is 5-10min, and the mixing temperature is 40-60 ℃.
5. The method according to claim 1, wherein the mixing time of the mixer in the step S3 is 40-60min and the mixing temperature is 120-135 ℃.
6. The method of claim 1, wherein the hot press molding requires a temperature of 180 ℃, a pressure of 2mpa, and a time of 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311356845.XA CN117417646A (en) | 2023-10-19 | 2023-10-19 | Bamboo fiber sheet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311356845.XA CN117417646A (en) | 2023-10-19 | 2023-10-19 | Bamboo fiber sheet and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117417646A true CN117417646A (en) | 2024-01-19 |
Family
ID=89524051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311356845.XA Pending CN117417646A (en) | 2023-10-19 | 2023-10-19 | Bamboo fiber sheet and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117417646A (en) |
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2023
- 2023-10-19 CN CN202311356845.XA patent/CN117417646A/en active Pending
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