CN105440329A - Preparation method of furniture material, and material obtained via preparation method - Google Patents
Preparation method of furniture material, and material obtained via preparation method Download PDFInfo
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- CN105440329A CN105440329A CN201510957417.1A CN201510957417A CN105440329A CN 105440329 A CN105440329 A CN 105440329A CN 201510957417 A CN201510957417 A CN 201510957417A CN 105440329 A CN105440329 A CN 105440329A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/14—Amylose derivatives; Amylopectin derivatives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B33/00—Preparation of derivatives of amylose
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention provides a preparation method of a furniture material. The preparation method comprises following steps: 1) a catalyst is added into gelatinized starch, an obtained mixture is heated to 95 DEG C, and paraformaldehyde and polyvinyl alcohol are added, after full dissolving an obtained mixed material is maintained for 30min; 2) 13 to 25 mass parts of melamine is added, and reaction is carried out for 2.5 to 3h; 3) 3 mass parts of sodium carbonate is added, an obtained product is stirred quickly, viscosity is increased rapidly, and reaction is stopped when viscosity is increased to be 1000mpa/s; and 4) a curing agent, an antifoaming agent, a softening agent, a coupling agent, a reinforcing agent, and a filling agent are added, an obtained material is stirred to be uniform at a high stirring speed, and then is delivered into a mould for compression moulding forming. In the preparation method, melamine starch modified resin is added into filling agents such as lignocelluloses, a fire retardant, the reinforcing agent, and a color masterbatch, and the non-combustible melamine furniture material is obtained via compression moulding forming. The furniture material is capable of saving energy, is friendly to the environment, is non-combustible, possesses moisture resistance, and acid and alkali resistance, and contains no formaldehyde; no harmful gas is released; and processing properties of the furniture material are equal to that of timber.
Description
Technical field
The invention belongs to the material compositions field containing organic high molecular compound, be specifically related to a kind of material compositions containing cyanurotriamide modified resin.
Background technology
Furniture material is divided into wood materials, steel material, glass material, Wood-plastic material.Wood materials is furniture material the earliest, still have now very many application, because it needs a large amount of timber larger on environmental protection impact, so multiplex waste and old wood pulverizing sticks with glue agent be compressed into material, although this density of material, intensity, toughness, water tolerance compare solid wood material a lot of defect, its price advantage obviously still has a lot of market.Steel material is many is combined into furniture with glass material, wood materials, and its air attractive in appearance, practical value are high, receive the favor in market.
Now Wood-plastic material section bar is commercially also called plastic-steel section bar.It is with polyvinyl chloride (PVC) resin for main raw material, add a certain proportion of stablizer, tinting material, weighting agent, UV light absorber etc., the forming material through extruding.Be a kind of novel material of construction be widely used, because its physicals is as rigidity, elasticity, corrosion-resistant, ageing resistance is excellent, is typically used as the alternative articles for use of the non-ferrous metals such as copper, zinc, aluminium.Because of its low price, rich color, the distinguishing feature such as durable in use, heat preservation and soundproof is functional, obtain in productive life and use widely.
The salient features of plastic-steel section bar has: 1, heat preservation energy-saving: plastic-steel section bar multi-cavity type structure, and have good heat-proof quality, heat transfer coefficient is low; 2, resistance to air loss: plastic-steel door and window resistance to air loss is far away higher than aluminum alloy doors and windows; 3, watertightness: because plastic-steel section bar has unique multi-cavity type structure, all have independently drain chamber, generally, the watertightness of casement window can reach Pyatyi, and sliding window can reach three grades to level Four; 4, anti-wind pressure: in independently plastic die cavity, the steel lining that 1.5 ~ 3MM is thick can be dosed; 5, erosion resistance: plastic-steel section bar has unique formula, has good erosion resistance, its work-ing life is about 10 times of steel sash; 6, weathering resistance: plastic-steel section bar adopts unique formula, improves its winter hardiness.
CN200610041030.2 wear-resistant wood plastic floor and production technique thereof, disclose a kind of wear-resistant wood plastic floor and production technique thereof.Its invention has luxurious aesthetic property, abrasion-proof and refractory, water-proof skid-proof, durable rotproofness, environmental safety, installation convenience, the features such as manufacturing process is simple, and also there is the excellent properties such as material proportion is little, intensity is high, weather-proof corrosion resistant, partiting thermal insulation, and raw material is sufficient, numerous in variety, easy to maintenance.Its main raw material is selected and is got polyvinyl chloride resin powder or plastic raw materials adds waste and old wood powder or plastic pellet made by filamentary material powder, activated Calcium carbonate and the auxiliary material such as additives for plastics, weighting agent, through extruding, mould compression molding, again through vacuum cooling, sizing, traction, fixed length cutting be that substrate moulded by wood; Then above-mentioned wood is moulded substrate through sand milling groove milling; Adopt waterproof tamanori that surface decoration layer and wood are moulded substrate and be complex as finished product.
The production method of a patent of invention CN201110229706.1 novel environment-friendlywood-plastic wood-plastic floor, does main material with polyethylene, adopts bamboo fibers to do auxiliary material, not only have the color and luster of bamboo, toughness, and the growth cycle of bamboo is short, aspect of drawing materials; Wood is moulded in plate and is added gac and can absorb obnoxious flavour in air, plays the environmental-protection function purified air.Bamboo fibers and polyethylene mass ratio are 1: 1 ~ 1: 4.Bamboo fibers and polyethylene is adopted to do sill, add filler for plastic, toughener, fire retardant and processing aid, granulation after high-speed mixing, by extrusion moulding, cooling, cutting, then gac is packed into the intermediate groove that layer moulded by wood, again together with the plastic layer high temperature adhesives of lower floor, finally mould above layer at wood and paste decorating film.
The material of invention prepared by CN200610041030.2, the highest high temperature resistant 350 DEG C, flammable level is B2.Patent CN201110229706.1 is the inflammable level of B3 because the polyethylene selected is major ingredient fire-protection rating.As can be seen here once run into the A level fire-protection standard that its fire resistance property of fire can not reach GB5022-1995 " National Standard of the People's Republic of China's code for fire prevention design of interior decoration of buildings " at all.
The material that above patented technology proposes, shortcoming is that fire-protection rating is up to B1 level, runs into high temperature and easily generates naked light burning and discharge a large amount of heat energy and generate dense black smoke.The effect intercepting burning things which may cause a fire disaster can not be played, just can become once presence of fire the thruster that expansion is spread in the scene of a fire, require that higher place is limited to use in a lot of fire-protection rating.The problem that imitative solid wood profile is anxious to be resolved at present is in sum the raising of fire-protection rating.
Summary of the invention
For the weak point that this area exists, the object of the invention is to propose a kind of preparation method, producing a kind of environmental protection and energy saving, do not fire, protection against the tide, acid and alkali-resistance, the furniture novel material that formaldehydeless and obnoxious flavour discharges, processing characteristics is equal to timber.
Another object of the present invention is the material that the described preparation method of proposition obtains.
For the technical scheme realizing above-mentioned purpose of the present invention is:
Plant the preparation method of furniture material, comprise step:
1) in pasted starch, catalyzer 3-5 mass parts is added, be warming up to 95 DEG C of reaction 90min, dropping pH value regulator to pH value stops dripping when being 10, Temperature fall to 72 ~ 76 DEG C add paraformaldehyde 5 ~ 12 mass parts, polyvinyl alcohol 5 mass parts, keep 30min after whole dissolving, now liquid is clear state;
Wherein, described catalyzer is: one or more in Mono Chloro Acetic Acid, dilute sulphuric acid, dilute hydrochloric acid;
2) add trimeric cyanamide 13 ~ 25 mass parts, adjust ph is 10, and every 20 ~ 30min pH value regulator control pH value remains between 9 ~ 10, and after reaction continues 2.5 ~ 3h, liquid becomes clarification again, stops adding conditioning agent and continues to react.
3) stir rapidly to adding sodium carbonate 3 mass parts during 170mpa/s in detection viscosity, viscosity increases sharply, stopped reaction when viscosity is 1000mpa/s,
4) according to mass parts, get step 3) obtained modified resin 100 parts, add 9 ~ 14 parts, solidifying agent, defoamer 0.3 ~ 0.5 part, flexibilizing agent 0.5 ~ 1 part, coupling agent 0.01 ~ 0.03 part, toughener 4-6 part, weighting agent 18-25 part, look mother 0 ~ 10 part, high-speed stirring is even, is put in compression molding in mould.
Wherein, step 1) described in pasted starch be, after starch mixes according to mass ratio 15 ~ 25:100 with water, be obtained by reacting at temperature 70 ~ 85 DEG C.Described starch is preferably amylose starch.
Amylose starch generates polysaccharide, maltose, glucose mixing solutions after being not exclusively hydrolyzed, it exists a large amount of hydroxyls can carry out condensation reaction with carbamide oxy-compound under the effect of catalyzer, and conditioning agent can destroy not to be had complete hydrolysis starch crystalline structure to form Large molecule active center its a large amount of hydroxyl part and carbamide oxy-compound can to carry out condensation reaction yet.
Wherein, step 2) described in pH value regulator be: the saturated aqueous solution of one or more in sodium hydroxide, sodium carbonate, calcium hydroxide, calcium oxide.
Further, step 3) take out material after reaction, at 80 DEG C, vacuum hydro-extraction is to solid form,
Wherein, step 4) described in solidifying agent be one or more in oxalic acid, formic acid, phosphoric acid, tosic acid, ammonium chloride, magnesium sulfate; Described defoamer is: one or more in silicone emulsion, polypropylene glycerol aether, polyoxyethylene glycerol ether, polydimethylsiloxane; Described flexibilizing agent is: one or more in polyoxyethylene glycol, self-crosslinking styrene acrylate resins, polyvinyl butyral acetal, phthalate, benzoic anhydride polyester polyol and isocyanate polymer; Described weighting agent is: one or more in rutile titanium white powder, silicon-dioxide, wood powder, active micro silicon powder, calcium oxide, magnesium oxide, aluminium hydroxide, magnesium hydroxide.
Preferably, described flexibilizing agent be self-crosslinking styrene acrylate resins or benzoic anhydride polyester polyol with isocyanate than 1:0.3 mixture.The preferred flexibilizing agent of institute mixes at normal temperatures, has better toughness after compression molding.
Wherein, described toughener is: one or more in calcium silicate whisker, active micro silicon powder, carboxymethyl cellulose, white carbon black; Described coupling agent is HK-560 or HK-550.
Further, described step 4) in, each composition is put in mould under moulding press 50KG pressure, keeps 10 minutes at temperature 120 DEG C, then keeps 20 minutes at 140 DEG C of temperature, compression molding.
The furniture material that preparation method of the present invention prepares.
Beneficial effect of the present invention is:
The preparation method that the present invention proposes, adds the weighting agents such as lignocellulose, fire retardant, toughener, look mother, is not fired a grade trimeric cyanamide furniture material through compression molding by trimeric cyanamide starch conversion resin.Can production environmental protection and energy saving, do not fire, furniture novel material that protection against the tide, acid and alkali-resistance, the release of formaldehydeless and obnoxious flavour, processing characteristics are equal to timber.
Method of the present invention obtain the furniture material obtained can follow closely, can riveting, lightweight, strength and toughness high, do not fire, formaldehydeless or obnoxious flavour release is applicable to doing the materials such as Furniture panel, sheet material, section bar.
Embodiment
Following examples for illustration of the present invention, but should not be used for limiting the scope of the invention.
The equipment component used in embodiment is: three mouthfuls of reactors, Jining Heng Tai Chemical Co., Ltd.; Automatic stirring temperature controller, Jining Heng Tai Chemical Co., Ltd.; Viscosity analyser, Jining Heng Tai Chemical Co., Ltd., PH determinator, Jining Heng Tai Chemical Co., Ltd., moisture detector, Jining Heng Tai Chemical Co., Ltd.; Vacuum drying box, Nanjing color coating mechanical means company limited.
In embodiment, if no special instructions, means used are this area routine techniques means.
Embodiment 1: the preparation of trimeric cyanamide starch conversion resin
In three mouthfuls of reactors, add maize amylose 18 grams, add 100 grams of distilled water, stirring heats 80 DEG C makes starch pasting, and add the dilute hydrochloric acid catalyzer 3 grams of 20%, now pH value is 5.3;
Be warming up to 95 DEG C of reaction 90min, be added dropwise to sodium hydroxide saturated solution 9 grams, now pH value determination is 10, stops titration, Temperature fall to 75 DEG C.
Add paraformaldehyde 10 grams, polyvinyl alcohol 5 grams keeps 30min after all dissolving, now liquid is clear state.Add trimeric cyanamide 20 grams and be 10 with sodium hydroxide saturated solution adjust ph, and every 30min conciliation pH value remains on 10.Reaction continues 2.5 liquid and again becomes clarification, and now stop adding conditioning agent and continue reaction 2 hours, pH value reduces to 7.
The viscosity measurements of material in reactor is 170mpa/s, add 3 grams, sodium carbonate to stir rapidly, material viscosity increases sharply, stop when viscosity is 1000mpa/s stirring, take out from reactor, put into vacuum drying box 80 DEG C of vacuum hydro-extraction to solid form and obtain trimeric cyanamide starch-resin, for subsequent use.
Embodiment 2
By resin 100.g processed for embodiment 1, solidifying agent oxalic acid 9 grams, defoamer silicone emulsion 0.3 gram, flexibilizing agent self-crosslinking styrene acrylate resins 0.5 gram, coupling agent HK-560 (lower same) 0.01 gram, toughener white carbon black 5 grams, 20 grams, weighting agent rutile titanium white powder (100 order), after mixing, high-speed stirring is even.
To be put in mould under moulding press 50KG pressure 120 DEG C 10 minutes, 140 DEG C 20 minutes, compression molding.
Product colour oyster white, physical strength is in table 2.
Embodiment 3
By resin 100g processed for embodiment 1, solidifying agent oxalic acid 10 grams, defoamer silicone emulsion 0.4 gram, flexibilizing agent benzoic anhydride polyester polyol and isocyanate 5g more female than 0.5 gram, 1:0.3 mixture, coupling agent 0.01-0.03 gram, fire retardant 2-3 gram, toughener alumina whisker 4 grams, weighting agent wood powder (500 order) 22 grams, look, high-speed stirring is even.
To be put in mould under moulding press 50KG pressure 120 DEG C 10 minutes, 140 DEG C 20 minutes, compression molding.
Embodiment 4
By resin 100.g processed for embodiment 1, solidifying agent ammonium chloride 9 grams, defoamer polypropylene glycerol aether 0.3 gram, flexibilizing agent benzoic anhydride polyester polyol and isocyanate polymer 0.5 gram, coupling agent 0.02 gram, toughener active micro silicon powder 6 grams, weighting agent wood powder 25 grams, high-speed stirring is even.To be put in mould under moulding press 50KG pressure 120 DEG C 10 minutes, 140 DEG C 20 minutes, compression molding.
Embodiment 5 combustionproperty detects
To the detection of the section bar that embodiment 2-4 obtains, detect according to being: People's Republic of China (PRC) GB8624-2006 " material of construction and product burns grading performance ", People's Republic of China (PRC) GB5022--1995 " code for fire prevention design of interior decoration of buildings ", People's Republic of China (PRC) GB/T8813-2008 " rigid foam compression performance mensuration ", People's Republic of China (PRC) GB/T10295-2008 " Technology of Steady State Thermal Resistance of Thermal Insulating Material and related characteristics measure heat flowmeter method ".
Part detecting instrument: JCB-2 building materials non-combustibility test stove, building material made monomer combustion testing apparatus, English Bel (Tianjin) detecting instrument company limited; Oxygen index tester, Chengde Jinjian Testing Instrument Co., Ltd.; Cigarette poison proofing unit, universal testing machine (GT-TS-200-M type), heat conduction coefficient tester, Taiwan High Speed Rail Testing Instruments company limited.
Comparative example is commercially available Wood plastic furniture sheet material, makes the model of long 20cm, wide 10cm.
Table 1 detected result
Embodiment 6 section bar mechanical property detects
The section bar that embodiment 2 ~ 4 is made is carried out to the detection of mechanical property, the standard of foundation is: the mensuration of GB/T1040.1-2006 plastic tensile performance, the mensuration of GB/T9341-2008 plastics bending property, the mensuration of GB1843-2008 plastics cantilever beam impact strength.
The each embodiment physicals of table 2
Although above the present invention has done detailed description, and on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (9)
1. a preparation method for furniture material, is characterized in that, comprises step:
1) in pasted starch, catalyzer 3 ~ 5 mass parts is added, be warming up to 95 DEG C of reaction 90min, dropping pH value regulator to pH value stops dripping when being 10, Temperature fall to 72 ~ 76 DEG C add paraformaldehyde 5 ~ 12 mass parts, polyvinyl alcohol 5 mass parts, keep 30min after whole dissolving, now liquid is clear state;
Wherein, described catalyzer is one or more in Mono Chloro Acetic Acid, dilute sulphuric acid, dilute hydrochloric acid;
2) add trimeric cyanamide 13 ~ 25 mass parts, adjust ph is 10, and every 20 ~ 30min pH value regulator control pH value remains between 9 ~ 10, and after reaction continues 2.5 ~ 3h, liquid becomes clarification again, stops adding conditioning agent and continues to react.
3) stir rapidly to adding sodium carbonate 3 mass parts during 170mpa/s in detection viscosity, viscosity increases sharply, stopped reaction when viscosity is 1000mpa/s,
4) according to mass parts, get step 3) obtained modified resin 100 parts, add 9 ~ 14 parts, solidifying agent, defoamer 0.3 ~ 0.5 part, flexibilizing agent 0.5 ~ 1 part, coupling agent 0.01-0.03 part, toughener 4`6 part, weighting agent 18 ~ 25 parts, look mother 0 ~ 10 part, high-speed stirring is even, is put in compression molding in mould.
2. preparation method according to claim 1, is characterized in that, step 1) described in pasted starch be, after starch mixes according to mass ratio 15 ~ 25:100 with water, be obtained by reacting at temperature 70 ~ 85 DEG C.
3. preparation method according to claim 1, is characterized in that, step 2) described in pH value regulator be: the saturated aqueous solution of one or more in sodium hydroxide, sodium carbonate, calcium hydroxide, calcium oxide.
4. preparation method according to claim 1, is characterized in that, step 3) reaction after take out material, at 80 DEG C, vacuum hydro-extraction is to solid form.
5. preparation method according to claim 1, is characterized in that, step 4) described in solidifying agent be one or more in oxalic acid, formic acid, phosphoric acid, tosic acid, ammonium chloride, magnesium sulfate; Described defoamer is: one or more in silicone emulsion, polypropylene glycerol aether, polyoxyethylene glycerol ether, polydimethylsiloxane; Described flexibilizing agent is: one or more in polyoxyethylene glycol, self-crosslinking styrene acrylate resins, polyvinyl butyral acetal, phthalate, benzoic anhydride polyester polyol and isocyanate polymer; Described weighting agent is: one or more in wood powder, active micro silicon powder, calcium oxide, magnesium oxide, aluminium hydroxide, magnesium hydroxide.
6. according to the arbitrary described preparation method of Claims 1 to 5, it is characterized in that, described flexibilizing agent is self-crosslinking styrene acrylate resins or benzoic anhydride polyester polyol and the mixture of isocyanate than 1:0.3.
7. according to the arbitrary described preparation method of Claims 1 to 5, it is characterized in that, described toughener is: one or more in calcium silicate whisker, active micro silicon powder, carboxymethyl cellulose, white carbon black; Described coupling agent is HK-560 or HK-550.
8., according to the arbitrary described preparation method of Claims 1 to 5, it is characterized in that, described step 4) in, each composition to be put in mould under moulding press 50KG pressure, keep 10 minutes at temperature 120 DEG C, then keep 20 minutes at 140 DEG C of temperature, compression molding.
9. the furniture material for preparing of the arbitrary described preparation method of claim 1 ~ 8.
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| CN201510957417.1A CN105440329B (en) | 2015-12-18 | 2015-12-18 | A kind of preparation method of furniture material and obtained material |
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| CN201510957417.1A CN105440329B (en) | 2015-12-18 | 2015-12-18 | A kind of preparation method of furniture material and obtained material |
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| CN105440329A true CN105440329A (en) | 2016-03-30 |
| CN105440329B CN105440329B (en) | 2018-03-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI621512B (en) * | 2017-05-09 | 2018-04-21 | Zeng Yuan Sheng | Method for manufacturing grass and wood fiber board |
| CN112063105A (en) * | 2020-08-25 | 2020-12-11 | 咖法科技(上海)有限公司 | Tea leaf residue melamine resin and preparation method thereof |
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| EP2402379A1 (en) * | 2010-07-02 | 2012-01-04 | Société anonyme NAICOM | Production method of urea-melamine-formaldehyde resin |
| CN102329472A (en) * | 2011-05-31 | 2012-01-25 | 厦门建霖工业有限公司 | Preparation method of tank body of closestool water tank molded by adopting composite material |
| CN103641970A (en) * | 2013-12-04 | 2014-03-19 | 中国林业科学研究院林产化学工业研究所 | Preparation method of high-solid-content melamino-formaldehyde-base resin |
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2015
- 2015-12-18 CN CN201510957417.1A patent/CN105440329B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2402379A1 (en) * | 2010-07-02 | 2012-01-04 | Société anonyme NAICOM | Production method of urea-melamine-formaldehyde resin |
| CN102329472A (en) * | 2011-05-31 | 2012-01-25 | 厦门建霖工业有限公司 | Preparation method of tank body of closestool water tank molded by adopting composite material |
| CN103641970A (en) * | 2013-12-04 | 2014-03-19 | 中国林业科学研究院林产化学工业研究所 | Preparation method of high-solid-content melamino-formaldehyde-base resin |
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| 马庆: "三聚氰胺-蔗糖-甲醛共缩聚树脂（MSF）合成与结构表征的研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI621512B (en) * | 2017-05-09 | 2018-04-21 | Zeng Yuan Sheng | Method for manufacturing grass and wood fiber board |
| CN112063105A (en) * | 2020-08-25 | 2020-12-11 | 咖法科技(上海)有限公司 | Tea leaf residue melamine resin and preparation method thereof |
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| CN105440329B (en) | 2018-03-06 |
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