CN115748307A - Laminated foam sheet molding green packaging material and preparation method thereof - Google Patents
Laminated foam sheet molding green packaging material and preparation method thereof Download PDFInfo
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- CN115748307A CN115748307A CN202211479898.6A CN202211479898A CN115748307A CN 115748307 A CN115748307 A CN 115748307A CN 202211479898 A CN202211479898 A CN 202211479898A CN 115748307 A CN115748307 A CN 115748307A
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- 239000006260 foam Substances 0.000 title claims abstract description 60
- 239000005022 packaging material Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000465 moulding Methods 0.000 title claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000002344 surface layer Substances 0.000 claims abstract description 23
- 238000005187 foaming Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 15
- 239000012792 core layer Substances 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 13
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 12
- 239000000853 adhesive Substances 0.000 claims abstract description 12
- 230000001070 adhesive effect Effects 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 12
- 239000004088 foaming agent Substances 0.000 claims abstract description 10
- 239000012778 molding material Substances 0.000 claims abstract description 10
- 239000003733 fiber-reinforced composite Substances 0.000 claims abstract description 7
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 6
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- SYELZBGXAIXKHU-UHFFFAOYSA-N dodecyldimethylamine N-oxide Chemical compound CCCCCCCCCCCC[N+](C)(C)[O-] SYELZBGXAIXKHU-UHFFFAOYSA-N 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229920002907 Guar gum Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000000665 guar gum Substances 0.000 claims description 3
- 229960002154 guar gum Drugs 0.000 claims description 3
- 235000010417 guar gum Nutrition 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011122 softwood Substances 0.000 claims description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- 229920002748 Basalt fiber Polymers 0.000 claims description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 2
- 239000000839 emulsion Substances 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000011121 hardwood Substances 0.000 claims description 2
- 238000007603 infrared drying Methods 0.000 claims description 2
- 229920002401 polyacrylamide Polymers 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 235000019422 polyvinyl alcohol Nutrition 0.000 claims description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 239000000344 soap Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- -1 sodium fatty alcohol Chemical class 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 244000007835 Cyamopsis tetragonoloba Species 0.000 description 1
- 241001397809 Hakea leucoptera Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Laminated Bodies (AREA)
Abstract
The invention discloses a laminated foam sheet molding green packaging material and a preparation method thereof. The preparation method comprises the following steps: mixing and dispersing wood pulp and an adhesive with film-forming property, adding a foaming agent for foaming, and adding a foam stabilizer for continuous foaming to obtain surface layer foam slurry; then mixing and dispersing the wood pulp fiber, the fiber reinforced composite material and the elastic adhesive, and obtaining the core layer foam slurry by the same method; and extruding and spraying the surface layer foam slurry onto a forming net, and drying to obtain the thin surface layer forming material. And extruding and spraying the core layer foam slurry onto the surface layer molding material for several times, and drying to obtain the composite molding material. And finally, extruding and spraying the surface layer foam slurry on the composite molding material, and drying to obtain the final composite molding material. The concentration of the fiber in the foam slurry is 1-5%, which is far higher than the concentration of the fiber produced by the common papermaking, so that the water consumption is greatly reduced; the method of the invention is improved on the basis of the traditional papermaking mode, reduces the equipment investment and saves the cost.
Description
Technical Field
The invention relates to a laminated foam sheet molding green packaging material and a preparation method thereof, belonging to the technical field of papermaking.
Background
With the rise and development of the packaging industry, the packaging materials with the buffering and shockproof functions are subjected to foam plastics, pulp molding materials and fiber foaming packaging materials in sequence. The foamed plastic has the advantages of light weight, easy processing, good protective performance, wide applicability, low cost and the like, but the foamed plastic is difficult to recycle after being discarded, pollutes the environment by burning and has poor environmental protection performance. With the gradual recognition of the low-carbon economy and green packaging concepts, the development technology of environment-friendly packaging materials is increasingly emphasized.
The foam forming technology is different from the traditional wet and dry forming technology, adopts foam as a carrier to bear fibers, enables the fibers to be well dispersed in water-based foam, and enables the fibers to be finally deposited on a net part by controlling the breakage of the foam so as to form a novel paper sheet forming technology of one or more layers of paper sheets. The forming technique can effectively reduce water consumption and energy consumption, and can prevent fiber flocculation, thereby producing paper or paperboard with excellent properties (such as evenness and bulk).
CN101787217B discloses a plant fiber foaming cushion packaging material and a manufacturing method thereof, wherein the material is uniformly mixed and then is injected into a mold, a slurry system is foamed and expanded under the action of a special foaming agent, and the cushion packaging material is obtained after demolding and drying, and is naturally degradable, low in cost and excellent in cushion performance. CN104312182B discloses a degradable foamed packaging material and a preparation method thereof, wherein the degradable foamed packaging material is obtained by performing superfine treatment on fibers, modifying a plant fiber composite base material, foaming, extruding, cooling and shaping. CN102977625B discloses a plant fiber foaming packaging plate and a processing technology thereof, wherein the plant fiber and an auxiliary agent are mixed, and the finished product is obtained through four processes of vacuum suction filtration, microwave foaming and hot air drying. The finished products are formed by the die, so that industrial production is difficult to realize, and the finished products are difficult to take out of the die, so that the utilization rate of the finished products is reduced.
Disclosure of Invention
The purpose of the invention is: aiming at the problems and defects of the prior art for preparing the foaming packaging plate by mould forming, the invention provides a laminated foam sheet forming green packaging material and a preparation method thereof.
In order to achieve the purpose, the invention provides a preparation method of a laminated foam sheet forming green packaging material, which is characterized by comprising the following steps:
step 1): mixing and dispersing wood pulp fibers and an adhesive with film-forming property, adding a foaming agent for foaming, and adding a foam stabilizer for continuous foaming to obtain surface layer foam slurry;
step 2): mixing and dispersing wood pulp fibers, fiber reinforced composite materials and elastic adhesives according to a certain proportion, adding a foaming agent for foaming, and adding a foam stabilizer for continuous foaming to obtain core layer foam slurry;
and step 3): extruding and spraying the surface layer foam slurry onto a forming net, and drying until the solid content of the slurry is 0-60 wt% to obtain a thin surface layer forming material;
step 4): extruding and spraying the core layer foam slurry onto the surface layer forming material for several times, and drying until the solid content of the slurry is 0-60 wt% to obtain a composite forming material;
and step 5): and extruding and spraying the surface layer foam slurry onto the composite molding material, and drying to obtain the final composite molding material.
Preferably, the wood pulp fibers in the step 1) are at least one of hardwood pulp fibers and softwood pulp fibers; the addition of the wood pulp fiber is 1-5 wt% of the surface layer foam slurry.
Preferably, the fiber reinforced composite material in the step 2) is at least one of carbon fiber, basalt fiber and silicon carbide fiber; the addition amount of the wood pulp fiber and the fiber reinforced composite material is 1 to 5 weight percent of the mass of the foam slurry of the core layer respectively.
Preferably, the adhesive with film-forming property in the step 1) is at least one of polyacrylamide, polyethylene oxide, polyvinyl alcohol, carboxymethyl cellulose, guar gum, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene ether and the like; the elastic adhesive in the step 2) is at least one of polyurethane rubber, styrene butadiene rubber and epoxy resin.
Preferably, the foaming agent in step 1) and step 2) is at least one of sodium dodecyl sulfate K12, sodium fatty alcohol-polyoxyethylene ether sulfate AES and rosin soap foaming agent.
Preferably, the foam stabilizer in step 1) and step 2) is at least one of dodecyl dimethyl amine oxide, alkyl alcohol amide and silicone polyether emulsion.
Preferably, the drying manner in steps 3) to 5) is vacuum drying or infrared drying.
The invention also provides a green packaging material prepared by the preparation method of the laminated foam sheet molding green packaging material. The thickness of the pressure-resistant layer is 10-100 mm, and the pressure-resistant range is 0.5-5 bar.
Compared with the prior art, the invention has the beneficial effects that:
according to the laminated foam sheet molding green packaging material and the preparation method thereof, the concentration of fibers in the foam slurry is 1% -5%, which is far higher than that of common papermaking, so that the water consumption is greatly reduced; the core layer foam slurry is sprayed on the primary core layer forming material for a plurality of times, so that the thickness of the material can be effectively increased; the core layer adopts high-elasticity modulus fiber and high-elasticity adhesive, so that the elasticity modulus of the material is increased; the surface layer adopts an adhesive with good film-forming property, so that the film-forming property of the material surface is improved; the improvement on the traditional papermaking mode reduces the equipment investment and saves the cost.
Drawings
FIG. 1 is a process flow diagram for preparing a laminated foam sheet molded green packaging material provided by the present invention;
FIG. 2 is a photograph of a real object of the material prepared in example 1;
fig. 3 is a photograph of a cross section of the material prepared in example 1.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The agents used in the examples of the present invention were purchased from national pharmaceutical reagents unless otherwise specified and were not further processed.
The percentages stated in the present invention are, unless otherwise specified, percentages by weight.
Example 1
A method for preparing a laminated foam sheet molding green packaging material is shown in figure 1, and comprises the following steps:
adopting a sulfate softwood bleached pulp board of Mo Banggao Sen paper making company, taking the absolute dry 4%, adding 10% absolute dry PVA217, then respectively adding 3.00% absolute dry guar gum, adding water, defibering at the rotating speed of 2000 rpm for 20min, after defibering and dispersing uniformly, adding 2g/L absolute dry sodium dodecyl sulfate, foaming at the rotating speed of 300-500 rpm, and adding 2g/L dodecyl dimethyl amine oxide for stabilizing the foam for 10min to obtain the surface layer foam slurry. And spraying the surface layer foam slurry onto a forming net for forming, and drying by infrared ray assistance until the solid content of the slurry is 0wt% to obtain the surface layer forming material.
Adopting a Mo Banggao forest paper making company sulfate needle wood bleached pulp board, taking 3% of absolute dry, taking 1% of absolute dry carbon fiber of a Switzerland company, adding 10% of absolute dry polyurethane and water, defibering at 2000 rpm for 20min, after defibering and dispersing uniformly, adding 2g/L of absolute dry sodium dodecyl sulfate, foaming at 300-500 rpm, adding 2g/L of dodecyl dimethyl amine oxide for stabilizing foam for 10min, and obtaining the core layer foam slurry. And spraying the core layer foam slurry to the surface layer forming material for forming, and drying by infrared ray assistance until the solid content of the slurry is 0wt% to obtain the one-step composite forming material.
And spraying the surface layer foam slurry onto the primary composite molding material for molding, and performing infrared ray assisted drying to obtain a final composite molding finished product. The actual picture and the sectional view are shown in fig. 2 and fig. 3, respectively.
Example 2
This example differs from example 1 in that guar was not added.
Example 3
This example differs from example 1 in that the sheet material was dried to 20wt% of the solids content of the slurry.
Example 4
This example is different from example 1 in that the core layer foam slurry was sprayed 3 times to the skin layer forming material to be formed.
The materials prepared in examples 1-4 were tested for performance. The test results are shown in table 1:
TABLE 1 test results of Material Properties
| Thickness/mm | Withstand voltage/bar | |
| Example 1 | 25 | 0.85 |
| Example 2 | 25 | 0.72 |
| Example 3 | 30 | 1.10 |
| Example 4 | 70 | 3.06 |
While the invention has been described with respect to a number of embodiments, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (8)
1. The preparation method of the laminated foam sheet molding green packaging material is characterized by comprising the following steps of:
step 1): mixing and dispersing wood pulp fibers and an adhesive with film-forming property, adding a foaming agent for foaming, and adding a foam stabilizer for continuous foaming to obtain surface layer foam slurry;
step 2): mixing and dispersing wood pulp fibers, fiber reinforced composite materials and elastic adhesives according to a certain proportion, adding a foaming agent for foaming, and adding a foam stabilizer for continuous foaming to obtain core layer foam slurry;
step 3): extruding and spraying the surface layer foam slurry onto a forming net, and drying until the solid content of the slurry is 0-60 wt% to obtain a thin surface layer forming material;
step 4): extruding and spraying the core layer foam slurry onto the surface layer forming material for several times, and drying until the solid content of the slurry is 0-60 wt% to obtain a composite forming material;
step 5): and extruding and spraying the surface layer foam slurry on the composite molding material, and drying to obtain the final composite molding material.
2. The method of producing a laminated foam sheet-formed green packaging material as claimed in claim 1, wherein the wood pulp fibers in the step 1) are at least one of hardwood pulp fibers and softwood pulp fibers; the addition of the wood pulp fiber is 1-5 wt% of the surface layer foam slurry.
3. The method of producing a laminated foam sheet-formed green packaging material of claim 1, wherein the fiber-reinforced composite material of step 2) is at least one of carbon fiber, basalt fiber and silicon carbide fiber; the addition amount of the wood pulp fiber and the fiber reinforced composite material is 1 to 5 weight percent of the mass of the foam slurry of the core layer respectively.
4. The method for preparing a laminated foam sheet-formed green packaging material according to claim 1, wherein the adhesive having film-forming property in step 1) is at least one of polyacrylamide, polyethylene oxide, polyvinyl alcohol, carboxymethyl cellulose, guar gum, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene ether, etc.; the elastic adhesive in the step 2) is at least one of polyurethane rubber, styrene butadiene rubber and epoxy resin.
5. The method for preparing a laminated foam sheet-formed green packaging material according to claim 1, wherein the foaming agent in the step 1) and the step 2) is at least one of sodium dodecyl sulfate K12, sodium fatty alcohol polyoxyethylene ether sulfate AES and rosin soap foaming agent.
6. The method for preparing a laminated foam sheet-formed green packaging material according to claim 1, wherein the foam stabilizer in step 1) and step 2) is at least one of dodecyldimethylamine oxide, alkylolamide and silicone polyether emulsion.
7. The method for preparing a laminated foam sheet-formed green packaging material according to claim 1, wherein the drying in steps 3) to 5) is performed by vacuum drying or infrared drying.
8. A green packaging material produced by the method of producing a laminated foam sheet-formed green packaging material according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211479898.6A CN115748307A (en) | 2022-11-24 | 2022-11-24 | Laminated foam sheet molding green packaging material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211479898.6A CN115748307A (en) | 2022-11-24 | 2022-11-24 | Laminated foam sheet molding green packaging material and preparation method thereof |
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| CN115748307A true CN115748307A (en) | 2023-03-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116732699A (en) * | 2023-05-24 | 2023-09-12 | 浙江诚品无纺科技有限公司 | Super absorbent wood pulp composite spunlaced non-woven fabric and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0019748A1 (en) * | 1979-05-11 | 1980-12-10 | Nisshinbo Industries, Inc. | Method of producing a fibre-reinforced resin foam and fibre-reinforced resin foam |
| US20040067353A1 (en) * | 2002-10-08 | 2004-04-08 | Miller Thomas S. | Self-foaming core reinforcement for laminate applications |
| CN106715794A (en) * | 2014-05-15 | 2017-05-24 | 美真纸板有限公司 | Method of producing boards |
| WO2018171914A1 (en) * | 2017-03-24 | 2018-09-27 | Tetra Laval Holdings & Finance S.A. | Method of manufacturing of a foam-formed cellulosic fibrematerial, a bulk sheet and a laminated packaging material comprising the cellulosic fibre-material |
| CN110077076A (en) * | 2019-04-29 | 2019-08-02 | 浙江巨化新材料研究院有限公司 | It is a kind of can recycled in its entirety polyester form sandwich composite board and its loop production technique |
| KR20200081074A (en) * | 2018-12-27 | 2020-07-07 | 한화글로벌에셋 주식회사 | Manufacturing method of sandwich panel and sandwich panel manufacturing by the same |
| WO2021260606A1 (en) * | 2020-06-24 | 2021-12-30 | Stora Enso Oyj | Water-resistant fibrous material and method for manufacturing it |
-
2022
- 2022-11-24 CN CN202211479898.6A patent/CN115748307A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0019748A1 (en) * | 1979-05-11 | 1980-12-10 | Nisshinbo Industries, Inc. | Method of producing a fibre-reinforced resin foam and fibre-reinforced resin foam |
| US20040067353A1 (en) * | 2002-10-08 | 2004-04-08 | Miller Thomas S. | Self-foaming core reinforcement for laminate applications |
| CN106715794A (en) * | 2014-05-15 | 2017-05-24 | 美真纸板有限公司 | Method of producing boards |
| WO2018171914A1 (en) * | 2017-03-24 | 2018-09-27 | Tetra Laval Holdings & Finance S.A. | Method of manufacturing of a foam-formed cellulosic fibrematerial, a bulk sheet and a laminated packaging material comprising the cellulosic fibre-material |
| KR20200081074A (en) * | 2018-12-27 | 2020-07-07 | 한화글로벌에셋 주식회사 | Manufacturing method of sandwich panel and sandwich panel manufacturing by the same |
| CN110077076A (en) * | 2019-04-29 | 2019-08-02 | 浙江巨化新材料研究院有限公司 | It is a kind of can recycled in its entirety polyester form sandwich composite board and its loop production technique |
| WO2021260606A1 (en) * | 2020-06-24 | 2021-12-30 | Stora Enso Oyj | Water-resistant fibrous material and method for manufacturing it |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116732699A (en) * | 2023-05-24 | 2023-09-12 | 浙江诚品无纺科技有限公司 | Super absorbent wood pulp composite spunlaced non-woven fabric and preparation method thereof |
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