CN112980134A - Efficient amino molding plastic production process - Google Patents
Efficient amino molding plastic production process Download PDFInfo
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- CN112980134A CN112980134A CN202110422040.5A CN202110422040A CN112980134A CN 112980134 A CN112980134 A CN 112980134A CN 202110422040 A CN202110422040 A CN 202110422040A CN 112980134 A CN112980134 A CN 112980134A
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- 238000000465 moulding Methods 0.000 title claims abstract description 32
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000004033 plastic Substances 0.000 title description 5
- 239000000463 material Substances 0.000 claims abstract description 64
- 238000001035 drying Methods 0.000 claims abstract description 30
- 238000004898 kneading Methods 0.000 claims abstract description 29
- 150000001875 compounds Chemical class 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 239000003086 colorant Substances 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 26
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 21
- 239000000314 lubricant Substances 0.000 claims abstract description 19
- 238000000227 grinding Methods 0.000 claims abstract description 17
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000008187 granular material Substances 0.000 claims abstract description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 8
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 239000000049 pigment Substances 0.000 claims description 7
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 230000002087 whitening effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 229920002678 cellulose Polymers 0.000 abstract description 3
- 239000001913 cellulose Substances 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000036632 reaction speed Effects 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08L61/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
-
- 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
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a high-efficiency amino molding compound production process, which comprises the steps of putting a melamine formaldehyde resin solution, wood pulp fibers, a lubricant, a curing agent and a coloring agent into a kneader for kneading, setting two stirring paddles of the kneader to have different rotating speeds respectively, adding the melamine formaldehyde resin solution into the kneader in batches, drying the granular materials formed by kneading through three sections of mesh belts at different temperatures, and finally crushing and grinding to obtain an amino molding compound product. According to the production process of the amino molding compound, the two stirring paddles move at different speeds to generate high pressure and shearing force, so that high friction force is generated in materials, intensive mixing and fine dispersion of the materials are realized, the reaction speed is accelerated, the resin solution is added into the kneading machine in batches, the concentration of components in the reaction process is changed, the chemical reaction is promoted to develop towards the positive reaction direction, the reaction time is saved, the resin solution and cellulose can be condensed better, and the strength of the amino molding compound product is effectively improved.
Description
Technical Field
The invention belongs to the field of amino molding compounds, and particularly relates to an efficient production process of an amino molding compound.
Background
Amino molding compound is a molding compound for compression molding which is usually obtained by kneading amino resin, alpha-cellulose, curing agent and other auxiliary agents, drying, crushing and ball milling, has the advantages of excellent electric arc resistance, high material hardness, scratch resistance, low price and the like, and is widely used for electric appliance parts, daily necessities, tableware and the like. The prior amino molding compound production has the defects of poor high temperature resistance, poor weather resistance, low strength and low production efficiency because the materials and the ingredients are not kneaded sufficiently and the fusion degree of the kneaded materials is influenced.
Chinese patent publication No. CN106117968A discloses an amino molding plastic powder for processing melamine tableware and a preparation method thereof, wherein steam is input into an interlayer of a kneading machine to accelerate the volatilization of material moisture, and rotating blades of the kneading machine can rotate positively and negatively to accelerate the mixing of materials, thereby shortening the production time and improving the production efficiency.
Disclosure of Invention
The invention aims to provide an efficient amino molding compound production process, which is convenient to operate, high in production efficiency, high in product strength and low in manufacturing cost.
The technical scheme provided by the invention is as follows:
the melamine formaldehyde resin solution, the wood pulp fiber, the lubricant, the curing agent and the colorant are put into a kneader for kneading, two stirring paddles of the kneader are respectively set with different rotating speeds, the temperature in the kneading process is kept at 55-60 ℃, and the kneading time is 30-60min after all the materials are added.
Preferably, the components are fed according to parts by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant.
Preferably, the rotating speed of one stirring paddle is 15-22 rpm, and the rotating speed of the other stirring paddle is 300-440 rpm.
Preferably, after the 1/3 resin solution is added into the kneader, the slow paddle is started, the wood pulp fiber is slowly added, after the wood pulp fiber is completely added, the lubricant, the curing agent, the colorant and the residual 2/3 resin solution are added, and the fast paddle is started after the feeding is finished.
And (3) placing the kneaded granular material in a mesh belt drying oven for drying, wherein the drying temperature is 75-105 ℃, the temperature of three sections of mesh belts at the front section of drying and feeding is 75-90 ℃, the temperature of a mesh belt at the middle section is 95-105 ℃, and the temperature of a mesh belt at the tail end is 80-95 ℃, so that the granular material is conveniently cooled before discharging.
Preferably, the thickness of the dried feeding material is 5-7cm, and the drying time is 45-50 min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by a filter screen, and grinding the screened unqualified material again until the screened unqualified material meets the requirements.
The invention provides an efficient ammonia-based membrane plastic production process, wherein two stirring paddles of a kneader are respectively set to different rotating speeds, and in the kneading process, high pressure and shearing force are generated by the movement of the two stirring paddles, so that high friction force is generated in materials, the materials are intensively mixed and finely dispersed, and a resin solution is added into the kneader in batches, and wood pulp fibers are slowly added in the stirring process of the slow paddles, so that the concentration of components in the reaction process is changed, the chemical reaction is promoted to develop towards the positive reaction direction, and on the other hand, the resin solution is fully impregnated with the materials such as cellulose, so that the reaction speed is accelerated, the reaction time is saved, the resin solution and the cellulose can be better condensed, and the strength of an amino membrane plastic product is effectively improved.
Drawings
FIG. 1 is a flow chart of the production process of amino molding resin of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Example 1
The reaction components of the amino molding compound comprise, by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant, wherein the colorant is color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent.
A production process of an amino molding compound comprises the following specific steps:
150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant are sequentially put into a kneader, two stirring paddles of the kneader are respectively set with different rotating speeds, one stirring paddle is 15r/min, the other stirring paddle is 300r/min, the kneading temperature is kept at 55 ℃, and the kneading time is 30min after all the materials are added.
And (3) placing the kneaded granular material in a mesh belt oven for drying, wherein the temperature of a three-section mesh belt at the front section of drying and feeding is 75 ℃, the temperature of a middle section mesh belt is 95 ℃, the temperature of a tail end mesh belt is 80 ℃, the feeding thickness is 5cm, and the drying time is 45min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by using an 80-mesh screen, and grinding the screened unqualified material again until the requirement is met.
Example 2
The reaction components of the amino molding compound comprise, by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant, wherein the colorant is color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent.
A production process of an amino molding compound comprises the following specific steps:
150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant are sequentially put into a kneader, two stirring paddles of the kneader are respectively set with different rotating speeds, one stirring paddle is 18r/min, the other stirring paddle is 400r/min, the kneading temperature is kept at 60 ℃, and the kneading time is 50min after all the materials are added.
And (3) placing the kneaded granular material in a mesh belt oven for drying, wherein the temperature of a three-section mesh belt at the front section of drying and feeding is 90 ℃, the temperature of a middle section mesh belt is 105 ℃, the temperature of a tail end mesh belt is 95 ℃, the feeding thickness is 6cm, and the drying time is 50min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by using an 80-mesh screen, and grinding the screened unqualified material again until the requirement is met.
Example 3
The reaction components of the amino molding compound comprise, by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant, wherein the colorant is color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent.
A production process of an amino molding compound comprises the following specific steps:
150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant are sequentially put into a kneader, two stirring paddles of the kneader are respectively set with different rotating speeds, one stirring paddle is 22r/min, the other stirring paddle is 440r/min, the kneading temperature is kept at 60 ℃, and the kneading time is 60min after all the materials are added.
And (3) placing the kneaded granular material in a mesh belt oven for drying, wherein the temperature of a three-section mesh belt at the front section of drying and feeding is 90 ℃, the temperature of a middle section mesh belt is 105 ℃, the temperature of a tail end mesh belt is 95 ℃, the feeding thickness is 7cm, and the drying time is 50min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by using an 80-mesh screen, and grinding the screened unqualified material again until the requirement is met.
Example 4
The reaction components of the amino molding compound comprise, by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant, wherein the colorant is color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent.
A production process of an amino molding compound comprises the following specific steps:
50 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant are sequentially put into a kneader, the rotating speed of one stirring paddle in the kneader is 22r/min, 100 parts of melamine formaldehyde resin solution is added, then the other stirring paddle is started, the rotating speed is 440r/min, the kneading temperature is kept at 55 ℃, and the kneading time is 45min after all the materials are added.
And (3) placing the kneaded granular material in a mesh belt oven for drying, wherein the temperature of a three-section mesh belt at the front section of drying and feeding is 90 ℃, the temperature of a middle section mesh belt is 105 ℃, the temperature of a tail end mesh belt is 95 ℃, the feeding thickness is 7cm, and the drying time is 50min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by using an 80-mesh screen, and grinding the screened unqualified material again until the requirement is met.
Comparative example 1
The reaction components of the amino molding compound comprise, by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant, wherein the colorant is color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent.
A production process of an amino molding compound comprises the following specific steps:
150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant are sequentially put into a kneader, the rotating speeds of two stirring paddles of the kneader are the same and are 300r/min, the kneading temperature is kept at 55 ℃, and the kneading time is 30min after all the materials are added.
And (3) placing the kneaded granular material in a mesh belt oven for drying, wherein the temperature of a three-section mesh belt at the front section of drying and feeding is 75 ℃, the temperature of a middle section mesh belt is 95 ℃, the temperature of a tail end mesh belt is 80 ℃, the feeding thickness is 5cm, and the drying time is 45min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by using an 80-mesh screen, and grinding the screened unqualified material again until the requirement is met.
Comparative example 2
The reaction components of the amino molding compound comprise, by weight, 150 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant, wherein the colorant is color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent.
A production process of an amino molding compound comprises the following specific steps:
50 parts of melamine formaldehyde resin solution, 30 parts of wood pulp fiber, 3 parts of lubricant, 2 parts of curing agent and 0.5 part of colorant are sequentially put into a kneader, the rotating speed of one stirring paddle in the kneader is 22r/min, 100 parts of melamine formaldehyde resin solution is added, then the other stirring paddle is started, the rotating speed is 440r/min, the kneading temperature is kept at 55 ℃, and the kneading time is 60min after all the materials are added.
And (3) placing the kneaded granular material in a mesh belt oven for drying, wherein the temperature of a three-section mesh belt at the front section of drying and feeding is 90 ℃, the temperature of a middle section mesh belt is 105 ℃, the temperature of a tail end mesh belt is 95 ℃, the feeding thickness is 7cm, and the drying time is 50min per material.
And (3) carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by using an 80-mesh screen, and grinding the screened unqualified material again until the requirement is met.
The results of the performance tests of examples 1-4 and comparative examples 1-2 are listed below:
TABLE 1
As can be seen from Table 1, in the example 1 of the present invention, compared with the comparative example 1, the two stirring paddles respectively set different rotation speeds are more favorable for the reaction between the materials, and the notch impact strength and the thermal deformation temperature of the produced amino molding compound are higher under the same reaction temperature and reaction time; in the embodiments 1-3 of the invention, as the rotating speeds of the two stirring paddles are respectively increased and the kneading time is increased, the notch impact strength and the thermal deformation temperature of the produced amino molding compound are higher; compared with the comparative example 2, the resin solution is added in batches, so that the reaction speed is accelerated, the kneading time is shortened, and the notch impact strength, the thermal deformation temperature and other properties of the produced amino molding compound are basically consistent, therefore, the production process of the amino molding compound is favorable for material dispersion and mixing by setting different rotating speeds of the stirring paddle and adding the resin solution in batches, the reaction process is promoted, and the strength of the amino molding compound product is improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (7)
1. An efficient amino molding compound production process comprises the following steps:
s1, putting a melamine formaldehyde resin solution, wood pulp fibers, a lubricant, a curing agent and a coloring agent into a kneading machine for kneading, setting two stirring paddles of the kneading machine to have different rotating speeds respectively, keeping the temperature of 55-60 ℃ in the kneading process, and kneading for 30-60min after all the materials are added.
S2, placing the kneaded granular material in a mesh belt drying oven for drying, wherein the drying temperature is 75-105 ℃, the temperature of three sections of mesh belts at the front section of drying and feeding is 75-90 ℃, the temperature of a mesh belt at the middle section is 95-105 ℃, and the temperature of a mesh belt at the tail end is 80-95 ℃, so that the granular material is conveniently cooled before discharging.
And S3, carrying out further grinding on the dried material after the dried material is primarily crushed by a crusher, screening the ground material by a filter screen, and grinding the screened unqualified material again until the screened unqualified material meets the requirements.
2. The production process of claim 1, wherein the components are fed according to parts by weight, the melamine formaldehyde resin solution is 150 parts, the wood pulp fiber is 30 parts, the lubricant is 3 parts, the curing agent is 2 parts, and the colorant is 0.5 part.
3. The process as claimed in claim 1, wherein the rotation speed of one of the paddles is 15-22 rpm, and the rotation speed of the other paddle is 300-440 rpm.
4. The production process of claim 3, wherein after 1/3 resin solution is added into the kneader, the slow paddle is started, the wood pulp fiber is slowly added, after all the wood pulp fiber is added, the lubricant, the curing agent, the colorant and the residual 2/3 resin solution are added, and the fast paddle is started after the feeding is finished.
5. The production process according to claim 1, wherein the dried feed material has a thickness of 5-7cm and a drying time of 45-50 min per material.
6. The production process of claim 1, wherein the colorant is a color paste mixed by 8% of titanium dioxide, 2% of whitening agent, 30% of pigment and 60% of dispersing agent, and the proportion of each component is weight ratio.
7. The process of claim 1 wherein the screen is 80 mesh.
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| CN202110422040.5A CN112980134A (en) | 2021-04-20 | 2021-04-20 | Efficient amino molding plastic production process |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1081759A (en) * | 1996-09-05 | 1998-03-31 | Matsushita Electric Works Ltd | Production of melamine resin molding material |
| CN105038120A (en) * | 2015-07-30 | 2015-11-11 | 德清县联诚氨基塑料制品有限公司 | Melamine resin |
| CN106117968A (en) * | 2016-06-26 | 2016-11-16 | 襄汾县瑞德合成材料有限公司 | A kind of for amino film plastics material powder processing melamine dishware and preparation method thereof |
-
2021
- 2021-04-20 CN CN202110422040.5A patent/CN112980134A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1081759A (en) * | 1996-09-05 | 1998-03-31 | Matsushita Electric Works Ltd | Production of melamine resin molding material |
| CN105038120A (en) * | 2015-07-30 | 2015-11-11 | 德清县联诚氨基塑料制品有限公司 | Melamine resin |
| CN106117968A (en) * | 2016-06-26 | 2016-11-16 | 襄汾县瑞德合成材料有限公司 | A kind of for amino film plastics material powder processing melamine dishware and preparation method thereof |
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