CN117344578B - Preparation method of melamine impregnated paper - Google Patents
Preparation method of melamine impregnated paper Download PDFInfo
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- CN117344578B CN117344578B CN202311251983.1A CN202311251983A CN117344578B CN 117344578 B CN117344578 B CN 117344578B CN 202311251983 A CN202311251983 A CN 202311251983A CN 117344578 B CN117344578 B CN 117344578B
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- impregnated paper
- impregnating
- melamine impregnated
- melamine
- preparation
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- 229920000877 Melamine resin Polymers 0.000 title claims abstract description 41
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 21
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 15
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- 238000005470 impregnation Methods 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- 241000220479 Acacia Species 0.000 claims abstract description 7
- 235000010643 Leucaena leucocephala Nutrition 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims abstract description 6
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims abstract description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 42
- 229920005989 resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 16
- 239000000243 solution Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 9
- 241000717739 Boswellia sacra Species 0.000 claims description 6
- 239000004863 Frankincense Substances 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 2
- 150000004692 metal hydroxides Chemical group 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 2
- 239000003002 pH adjusting agent Substances 0.000 claims 1
- 239000013521 mastic Substances 0.000 abstract description 5
- 230000009466 transformation Effects 0.000 abstract description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract 1
- 235000010489 acacia gum Nutrition 0.000 description 8
- 229920000084 Gum arabic Polymers 0.000 description 6
- 239000000205 acacia gum Substances 0.000 description 6
- 244000215068 Acacia senegal Species 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004640 Melamine resin Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 2
- 239000001785 acacia senegal l. willd gum Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 244000237330 gutta percha tree Species 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 235000003717 Boswellia sacra Nutrition 0.000 description 1
- 235000012035 Boswellia serrata Nutrition 0.000 description 1
- 239000000899 Gutta-Percha Substances 0.000 description 1
- 240000000342 Palaquium gutta Species 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- USDJGQLNFPZEON-UHFFFAOYSA-N [[4,6-bis(hydroxymethylamino)-1,3,5-triazin-2-yl]amino]methanol Chemical compound OCNC1=NC(NCO)=NC(NCO)=N1 USDJGQLNFPZEON-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- HANVTCGOAROXMV-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine;urea Chemical compound O=C.NC(N)=O.NC1=NC(N)=NC(N)=N1 HANVTCGOAROXMV-UHFFFAOYSA-N 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229920000588 gutta-percha Polymers 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
Landscapes
- Paper (AREA)
Abstract
The invention belongs to the technical field of impregnated paper, and particularly relates to a preparation method of melamine impregnated paper, which comprises the steps of impregnating base paper with impregnating adhesive, extruding to remove redundant impregnating adhesive after impregnation, drying and cooling; the impregnating adhesive comprises the following components: melamine, formaldehyde, hydroxyethyl methacrylate, polyvinyl alcohol, triethylamine, glycerol, acacia, mastic. The preparation process is matched with the existing equipment, new equipment is not needed, and the transformation cost is low. The invention improves the toughness and softness of the melamine impregnated paper, and has good comprehensive mechanical properties.
Description
Technical Field
The invention belongs to the technical field of impregnated paper, and particularly relates to a preparation method of melamine impregnated paper and a preparation method thereof.
Background
Melamine impregnated paper is known collectively as Melamine impregnated bond paper (Melamine-Urea-Formaldehyde ImpregnatedBond Paper), also known as "Melamine" paper; the melamine impregnated adhesive film paper facing artificial board is generally used for the surfaces of various furniture or other building material boards to prepare the melamine impregnated adhesive film paper facing artificial board.
The melamine impregnated adhesive film paper facing artificial board is prepared by impregnating plain color base paper or printing decorative paper with amino resin (melamine formaldehyde resin and urea formaldehyde resin) and drying to a certain degree, and can be glued with an artificial board base material through hot pressing; production is now mainly carried out by means of a horizontal impregnation drying line.
The preparation method of the melamine impregnated paper mainly comprises a primary impregnation drying method and a secondary impregnation drying method, but both methods need to be subjected to the preparation method: raw material treatment, solution preparation, dipping treatment, drying and curing and other steps; and drying and cooling, shearing to obtain a finished product, and then closely attaching the finished product to a base material through hot pressing and solidification.
The process section in which impregnation and drying are the core, wherein the impregnation section is a process section for impregnating paper with resin, requires that the resin sufficiently infiltrate into the inside of the paper, and accurately controls the amount of gum impregnated. Is a core element affecting the quality of the impregnated paper product. The drying section requires a degree of dryness within a certain range, and if the degree of dryness is too low, it will negatively affect the quality of the impregnated paper both too high and too low.
However, the tensile strength and hardness of melamine impregnated paper are difficult to reconcile, and in general, the tensile strength and hardness of melamine impregnated paper are high; so that the melamine impregnated paper is easy to crack during use, which is one of the places where important improvement is required in the current melamine impregnated paper.
Disclosure of Invention
The invention aims to provide a preparation method of melamine impregnated paper, which has lower formaldehyde release amount and good comprehensive mechanical properties.
The preparation method of melamine impregnated paper comprises impregnating base paper with impregnating adhesive, extruding to remove excessive impregnating adhesive, drying, and cooling;
The impregnating adhesive comprises the following components in parts by mass:
Preferably, the alcoholysis degree of the polyvinyl alcohol is 87-97%; the average relative molecular weight is less than or equal to 30000.
Preferably, the preparation of the impregnating adhesive comprises the following steps:
(1) Taking formaldehyde aqueous solution, and regulating the pH to 7.5-8.5; adding melamine, hydroxyethyl methacrylate and polyvinyl alcohol under stirring; obtaining a solution A;
(2) Stirring the solution A, adding glycerol, acacia and olibanum resin, and finally adding triethylamine; obtaining a solution B;
(3) Heating the solution B to 60-65 ℃ and stirring for 1-1.5h; then cooling to 30-35 ℃ and keeping for 2-3h; to obtain the impregnating adhesive.
The Ph adjusting regulator is a metal hydroxide, typically sodium hydroxide or potassium hydroxide.
The formaldehyde mass fraction of the formaldehyde aqueous solution is 30-40%.
Preferably, a horizontal secondary impregnation dryer is used for impregnation.
The paper dipping speed is 12-15m/s, the primary drying temperature is 95-120 ℃, and the secondary drying temperature is 130-140 ℃.
The melamine resin prepared by the methylolation reaction of melamine and formaldehyde and then polycondensation is taken as a main body; in order to control the methylol degree of the melamine, the mole ratio of the melamine to formaldehyde is controlled to be 1:3-4, so as to prepare the trimethylol melamine resin as much as possible; meanwhile, in order to improve the mechanical characteristics of poor toughness, the following components are added:
hydroxyethyl methacrylate is a crosslinkable monomer which can be copolymerized with melamine resin to increase the elasticity and toughness of the resin.
The polyvinyl alcohol can change the molecular chain structure, increase toughness and reduce brittleness; meanwhile, the paper can be additionally used as a penetrating agent to increase the absorption capacity of the paper to the resin.
Triethylamine was used as a catalyst for the reaction.
Glycerol is used as a polyhydric alcohol and as a thickener to improve the softness of the resin.
The acacia contains a large amount of high molecular polysaccharide, so that the viscosity of the impregnating adhesive is improved, and the adhesive solution is prevented from losing; and the toughness of the resin can be increased by being matched with the mastic.
The olibanum resin contains 60-70% of resin, 27-35% of gum, and 3-8% of volatile oil component; resin and gum components in the mastic resin can be compounded with Arabic gum and glycerol to form a thickening agent, so that the toughness of the melamine resin is improved; the olibanum contains antioxidant and antibacterial components, which can prolong the service life of the resin and improve the stability of the resin.
The invention has the beneficial effects that:
(1) The preparation process is matched with the existing equipment, new equipment is not needed, and the transformation cost is low.
(2) The invention improves the toughness and softness of the melamine impregnated paper, and has good comprehensive mechanical properties.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the present invention, but are merely illustrative of the present invention. The experimental methods used in the following examples are not specifically described, but the experimental methods in which specific conditions are not specified in the examples are generally carried out under conventional conditions, and the materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.
The sources of the materials used in the invention are as follows:
melamine: shanghai Ala Biochemical technology Co.Ltd
Formaldehyde: shanghai Ala Biochemical technology Co.Ltd
Hydroxyethyl methacrylate: shanghai Ala Biochemical technology Co.Ltd
Polyvinyl alcohol: polyvinyl alcohol 1788, shanghai Ala Biochemical technology Co., ltd
Polyvinyl alcohol: polyvinyl alcohol 1795 type, shanghai Ala Biochemical technology Co., ltd
Triethylamine: shandong yanshuo chemical industry Co., ltd
Glycerol: shanghai Ala Biochemical technology Co.Ltd
Acacia gum: mountain Dongfeng Tay Biotechnology Co Ltd
Mastic resin: somali Olibanum, small Madi granule, zhejiang Yikou Co., ltd
Gutta-percha, shanxi Muyu biological technology Co., ltd
Paper: laminating base paper, shanghai Pang Ran Utility Co., ltd.
The preparation method of the melamine impregnated paper comprises the following steps:
preparation of impregnating adhesive:
(1) Taking formaldehyde aqueous solution, and regulating the pH to 7.5-8.5; adding melamine, hydroxyethyl methacrylate and polyvinyl alcohol under stirring; obtaining a solution A;
(2) Stirring the solution A, adding other raw materials except triethylamine, and finally adding triethylamine; obtaining a solution B;
(3) Heating the solution B to a first preset temperature, stirring and maintaining for a certain time; then cooling to a second preset temperature and keeping for a certain time; the impregnating adhesive is obtained, and the solid content is regulated to be within 50-60 percent.
The dipping step comprises the following steps: a horizontal secondary dipping dryer is adopted for dipping,
The raw material ratios and the following tables 1-1, 1-2 (unit parts by mass) are shown.
Preparation method components and process table of melamine impregnated paper are shown in table 1-1
Preparation method components and process table of melamine impregnated paper are shown in tables 1-2
The blank in tables 1-1 and 1-2 indicates that there is no corresponding addition.
The adhesion was determined according to the GB/T1720-2020 paint film circling test.
Tensile strength, modulus of elasticity and elongation at break were measured according to GB/T7911-2013 thermosetting resin impregnated paper high pressure decorative laminate (HPL).
According to the physical and chemical property test method of GB/T17657-2022 artificial boards and decorative artificial boards, the formaldehyde release amount of the darkroom is measured.
The test results are shown in table 2 below.
| Item/serial number | 1 | 2 | 3 | 4 | 5 |
| Adhesion rating | 1 | 1 | 1 | 1 | 1 |
| Tensile strength, mpa | 108.4 | 114.3 | 116.0 | 118.2 | 112.1 |
| Modulus of elasticity, mpa | 10832 | 11032 | 11232 | 11312 | 10987 |
| Elongation at break% | 4.08 | 4.10 | 4.16 | 4.20 | 4.16 |
| Formaldehyde emission (darkroom), mg/L | 0.11 | 0.12 | 0.12 | 0.11 | 0.14 |
| Item/serial number | 6 | 7 | 8 | 9 | 10 |
| Adhesion rating | 1 | 2 | 2 | 1 | 1 |
| Tensile strength, mpa | 97.4 | 92.2 | 103.2 | 104.3 | 114.2 |
| Modulus of elasticity, mpa | 9964 | 8762 | 11628 | 11321 | 14218 |
| Elongation at break% | 4.22 | 4.62 | 3.26 | 3.78 | 2.78 |
| Formaldehyde emission (darkroom), mg/L | 0.11 | 0.11 | 0.11 | 0.10 | 0.10 |
In table 2, the adhesion rating was the best at level 1 and the worst at level 7. The higher the tensile strength, the higher the tensile properties. The higher the modulus of elasticity, the more difficult it is to form the material, with higher stiffness and lower plasticity. The higher elongation at break represents a better ductility and plasticity.
As can be seen from the comparison of the numbers 1,7 and 8 in Table 2, the addition of the gum arabic results in a decrease in the adhesion, and the excessive addition results in a decrease in the adhesion grade; when the adhesion falls within the acceptable range, the adhesion grade also decreases when eucommia ulmoides is used instead of acacia. Further, as is clear from the comparison of the numbers 1 and 8, when eucommia ulmoides is used instead of acacia, the tensile strength is not greatly different, but the optimizing effect on the elongation at break is poor.
As is clear from the comparison of the numbers 1 and 6, when the alcoholysis degree of the polyvinyl alcohol is too high, the tensile strength is excessively lowered although the toughness of the melamine impregnated paper is better, which is not yet appreciated.
As is clear from the comparison of the numbers 1, 9, 10, when no mastic and acacia are added, the tensile strength is better, but the rigidity is too high, resulting in insufficient toughness. Namely, the toughness can be obviously improved by adding the frankincense and the Arabic gum; when gum arabic is used alone without addition of gum arabic, although the elasticity is better than when no addition is made, the optimizing effect of elongation at break is inferior to when gum arabic and gum arabic are simultaneously added.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention, but rather to enable any modification, equivalent replacement, improvement or the like to be included within the spirit and principles of the invention.
Claims (5)
1. A preparation method of melamine impregnated paper is characterized in that impregnating base paper with impregnating glue, extruding to remove redundant impregnating glue after impregnation, drying and cooling;
The impregnating adhesive comprises the following components in parts by mass:
The alcoholysis degree of the polyvinyl alcohol is 87-97%; the average relative molecular weight is less than or equal to 30000;
The preparation of the impregnating adhesive comprises the following steps:
(1) Taking formaldehyde aqueous solution, and regulating the pH to 7.5-8.5; adding melamine, hydroxyethyl methacrylate and polyvinyl alcohol under stirring; obtaining a solution A;
(2) Stirring the solution A, adding glycerol, acacia and olibanum resin, and finally adding triethylamine; obtaining a solution B;
(3) Heating the solution B to 60-65 ℃ and stirring for 1-1.5h; then cooling to 30-35 ℃ and keeping for 2-3h; to obtain the impregnating adhesive.
2. The method for producing melamine impregnated paper according to claim 1, wherein the Ph adjusting agent is a metal hydroxide.
3. The method for producing melamine impregnated paper according to claim 1, wherein the formaldehyde mass fraction of the formaldehyde aqueous solution is 30-40%.
4. The method for producing melamine impregnated paper according to claim 1, wherein the impregnation is performed by a horizontal secondary impregnation dryer.
5. The method for producing melamine impregnated paper according to claim 4, wherein the paper impregnation speed is 12-15m/s, the primary drying temperature is 95-120 ℃, and the secondary drying temperature is 130-140 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311251983.1A CN117344578B (en) | 2023-09-26 | 2023-09-26 | Preparation method of melamine impregnated paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311251983.1A CN117344578B (en) | 2023-09-26 | 2023-09-26 | Preparation method of melamine impregnated paper |
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| Publication Number | Publication Date |
|---|---|
| CN117344578A CN117344578A (en) | 2024-01-05 |
| CN117344578B true CN117344578B (en) | 2024-05-17 |
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| CN202311251983.1A Active CN117344578B (en) | 2023-09-26 | 2023-09-26 | Preparation method of melamine impregnated paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753934A (en) * | 1970-09-07 | 1973-08-21 | Ciba Geigy Ag | Process for the manufacture of new plasticised melamine formaldehyde condensates |
| CN104884706A (en) * | 2012-12-31 | 2015-09-02 | 纳尔科公司 | Method of increasing paper strength by using natural gums and dry strength agent in the wet end |
| CN105121727A (en) * | 2013-03-28 | 2015-12-02 | 巴斯夫欧洲公司 | Flexible flat substrates having an abrasive surface |
| KR20150136407A (en) * | 2014-05-27 | 2015-12-07 | 조종수 | Frankincense Resin Ttreatment Paper and Method of Manufacturing thereof |
| TR202105435A2 (en) * | 2021-03-25 | 2021-04-21 | Bursa Uludag Ueniversitesi | Development of Acacia-Frankincense blend bioresin and biodegradable composite material reinforced with enset woven fabric and its production with this bioresin |
| CN112941968A (en) * | 2021-04-20 | 2021-06-11 | 广东靓时新材料科技有限公司 | Fragrance-releasing decorative artificial board and preparation method thereof |
| CN114134751A (en) * | 2021-11-01 | 2022-03-04 | 山东亿森美居新材料科技有限公司 | Novel waterproof composite resin for impregnating surface layer of laminate wood floor and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140248370A1 (en) * | 2013-03-04 | 2014-09-04 | Abdulkadir Hashi Ali | Enhancement Composition |
| US20140262018A1 (en) * | 2013-03-12 | 2014-09-18 | Celanese Acetate Llc | Hot Melt and Pressure Sensitive Adhesives that Include Highly-Plasticized Cellulose Esters and Methods and Articles Relating Thereto |
| US20160068665A1 (en) * | 2014-09-09 | 2016-03-10 | Celanese Acetate Llc | Cellulose ester plastics and methods and articles relating thereto |
-
2023
- 2023-09-26 CN CN202311251983.1A patent/CN117344578B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753934A (en) * | 1970-09-07 | 1973-08-21 | Ciba Geigy Ag | Process for the manufacture of new plasticised melamine formaldehyde condensates |
| CN104884706A (en) * | 2012-12-31 | 2015-09-02 | 纳尔科公司 | Method of increasing paper strength by using natural gums and dry strength agent in the wet end |
| CN105121727A (en) * | 2013-03-28 | 2015-12-02 | 巴斯夫欧洲公司 | Flexible flat substrates having an abrasive surface |
| KR20150136407A (en) * | 2014-05-27 | 2015-12-07 | 조종수 | Frankincense Resin Ttreatment Paper and Method of Manufacturing thereof |
| TR202105435A2 (en) * | 2021-03-25 | 2021-04-21 | Bursa Uludag Ueniversitesi | Development of Acacia-Frankincense blend bioresin and biodegradable composite material reinforced with enset woven fabric and its production with this bioresin |
| CN112941968A (en) * | 2021-04-20 | 2021-06-11 | 广东靓时新材料科技有限公司 | Fragrance-releasing decorative artificial board and preparation method thereof |
| CN114134751A (en) * | 2021-11-01 | 2022-03-04 | 山东亿森美居新材料科技有限公司 | Novel waterproof composite resin for impregnating surface layer of laminate wood floor and preparation method thereof |
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| CN117344578A (en) | 2024-01-05 |
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