CN110938283A - Thermochromic non-wood fiber melamine powder - Google Patents
Thermochromic non-wood fiber melamine powder Download PDFInfo
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- CN110938283A CN110938283A CN201910919923.XA CN201910919923A CN110938283A CN 110938283 A CN110938283 A CN 110938283A CN 201910919923 A CN201910919923 A CN 201910919923A CN 110938283 A CN110938283 A CN 110938283A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
Abstract
The heat discoloration resistant non-wood fiber melamine powder is characterized in that the molding compound for melamine tableware comprises the following components in percentage by mass: 60-70% of melamine formaldehyde resin, 20-30% of fiber, 0.1-0.5% of curing agent, 3-10% of dispersing agent, 1.0-1.5% of titanium dioxide and the balance of pigment, wherein the components are one hundred percent by mass; the fiber is composed of at least one of glass fiber, cotton fiber and fibrilia, the manufacturing process is simple, the effect is good, the product is attractive, elegant, stable and durable in use, all natural materials are used in the manufacturing process, no pollution is caused, and the manufactured product meets the national standard, even is up to the national standard.
Description
Technical Field
The invention relates to a heat discoloration resistant non-wood fiber melamine powder, belonging to the field of molding compound manufacture.
Background
Common melamine tableware is attractive and well liked by people, but due to the existence of a large amount of wood fibers, the tableware can slowly become yellow when being used at high temperature for a long time, so that the beautiful appearance of the tableware is lost, and the service life of the tableware is shortened.
The invention content is as follows:
the invention aims to overcome the defects in the prior art and provide the thermal discoloration resistant non-wood fiber melamine powder, and the molding compound for melamine tableware comprises the following components in percentage by mass:
the components are based on one hundred mass percent; the fiber is composed of at least one of glass fiber, cotton fiber and hemp fiber.
Preferably, the molding compound for melamine tableware comprises the following components in percentage by mass:
the components are based on one hundred mass percent; the fiber is composed of at least one of glass fiber, cotton fiber and hemp fiber.
The preparation method comprises the following steps:
(1) adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) starting to heat, adding melamine, heating to 80-100 ℃ and reacting;
(3) and (3) reaction end point: the resin was tested for white precipitate with 4 ℃ water.
(4) Adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: and adding the fiber, the dispersing agent, the curing agent and the prepared resin by using a Z-type low-speed kneader, kneading, and stirring uniformly by changing the stirring direction at regular time.
(6) And (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours.
(7) Crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, curing fluidity control and the like. The ball mill jacket needs to be cooled by cooling water, and the material temperature is not higher than 50 ℃.
(8) Packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place.
Preferably, the method comprises the following steps:
in the step (1), the pH value is adjusted to 8.5 by adding sodium hydroxide;
in the step (2), melamine is added, and the temperature is raised to 85 ℃ for reaction;
in the step (6), drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at 83.5 ℃, the drying is uniform, the water content is controlled to be below 3.5 percent, and the drying time is about 3.5 hours;
in the step (7), crushing and ball milling: the materials are crushed and then enter a ball mill for ball milling for 6 hours.
The invention has the advantages of simple manufacturing process, good effect, beautiful and elegant appearance, stability and durability of the product, no pollution caused by pure natural materials used in the manufacturing process, and the manufactured product conforms to the national standard even to the national standard.
Detailed Description
1. The present invention will be described in detail below: the heat discoloration resistant non-wood fiber melamine powder is characterized in that the melamine tableware molding compound consists of the following components in percentage by mass:
the components are based on one hundred mass percent; the fiber is composed of at least one of glass fiber, cotton fiber and hemp fiber.
The molding compound for melamine tableware specifically comprises the following components in percentage by mass:
the components are based on one hundred mass percent; the textile fiber is composed of at least one of glass fiber, cotton fiber and hemp fiber.
The preparation method comprises the following steps:
(1) adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) starting to heat, adding melamine, heating to 80-100 ℃ and reacting;
(3) and (3) reaction end point: the resin was tested for white precipitate with 4 ℃ water.
(4) Adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: and adding the fiber, the dispersing agent, the curing agent and the prepared resin by using a Z-type low-speed kneader, kneading, and stirring uniformly by changing the stirring direction at regular time.
(6) And (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours.
(7) Crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, curing fluidity control and the like. The ball mill jacket needs to be cooled by cooling water, and the material temperature is not higher than 50 ℃.
(8) Packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place. In the step (1), the pH value is adjusted to 8.5 by adding sodium hydroxide;
in the step (2), melamine is added, and the temperature is raised to 85 ℃ for reaction;
in the step (6), drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at 83.5 ℃, the drying is uniform, the water content is controlled to be below 3.5 percent, and the drying time is about 3.5 hours;
in the step (7), crushing and ball milling: the materials are crushed and then enter a ball mill for ball milling for 6 hours.
The first embodiment is as follows: glass fiber
(1) Adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) starting to heat, adding melamine, heating to 80-100 ℃ and reacting;
(3) and (3) reaction end point: the resin was tested for white precipitate with 4 ℃ water.
(4) Adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: and (3) kneading the glass fiber, the dispersing agent, the curing agent and the prepared resin by using a Z-type low-speed kneader, and stirring uniformly by changing the stirring direction at regular time.
(6) And (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours.
(7) Crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, curing fluidity control and the like. The ball mill jacket needs to be cooled by cooling water, and the material temperature is not higher than 50 ℃.
(8) Packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place. The second specific embodiment is as follows: adding fibrilia
(1) Adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) heating, adding melamine, and heating to 80-100 ℃ for reaction;
(3) and (3) reaction end point: the resin was tested for white precipitate with 4 ℃ water.
(4) Adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: adding the fibrilia, the dispersing agent, the curing agent and the prepared resin into a Z-type low-speed kneader, kneading, changing the stirring direction at regular time, and stirring until the mixture is uniform.
(6) And (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours.
(7) Crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, curing fluidity control and the like. The ball mill jacket needs to be cooled by cooling water, and the material temperature is not higher than 50 ℃.
(8) Packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place.
The third concrete embodiment: adding cotton fiber
(1) Adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) starting to heat, adding melamine, heating to 80-100 ℃ and reacting;
(3) and (3) reaction end point: the resin was tested for white precipitate with 4 ℃ water.
(4) Adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: and (3) adding the cotton fiber, the dispersing agent, the curing agent and the prepared resin into a Z-type low-speed kneader, kneading, changing the stirring direction at regular time, and stirring uniformly.
(6) And (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours.
(7) Crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, curing fluidity control and the like. The ball mill jacket needs to be cooled by cooling water, and the material temperature is not higher than 50 ℃.
(8) Packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place.
The method of the specific embodiment four: adding hemp fiber and cotton fiber
(1) Adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) starting to heat, adding melamine, heating to 80-100 ℃ and reacting;
(3) and (3) reaction end point: the resin was tested for white precipitate with 4 ℃ water.
(4) Adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: adding wood fiber, cotton fiber, a dispersing agent, a curing agent and the prepared resin into a Z-type low-speed kneader, kneading, changing the stirring direction at regular time, and stirring uniformly.
(6) And (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours.
(7) Crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, curing fluidity control and the like. The ball mill jacket needs to be cooled by cooling water, and the material temperature is not higher than 50 ℃.
(8) Packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place.
Whiteness testing experiments:
1. directly putting the wood fiber, the hemp fiber and the cotton fiber into a 130 ℃ oven, carrying out high-temperature treatment for different times, and then carrying out whiteness test by using a whiteness tester. The results are as follows:
| whiteness value | Wood fiber | Fibrilia | Cotton fiber |
| Initial whiteness | 89.2 | 79.4 | 88.9 |
| Whiteness after 7h | 81.1 | 75.2 | 82.5 |
| Whiteness after 14h | 76.4 | 72.3 | 79.7 |
| Whiteness after 24h | 72 | 69.1 | 76.4 |
After 24 hours of high-temperature treatment, the whiteness value of the wood fiber is reduced by 19.3 percent, the whiteness value of the hemp fiber is reduced by 12.9 percent, and the whiteness value of the cotton fiber is reduced by 14.1 percent.
2. At least one of wood fiber, cotton fiber and hemp fiber is made into melamine product, which is put into a 130 ℃ oven for high temperature treatment at different time and then whiteness test is carried out by a whiteness meter. The results are as follows:
after 24 hours of high-temperature treatment, the whiteness value of the wood fiber melamine product is reduced by 19.7 percent, the whiteness value of the wood fiber and cotton fiber melamine product is reduced by 14.4 percent, and the whiteness value of the cotton fiber and hemp fiber melamine product is reduced by 10.0 percent
The tests show that: the glass fiber is not easy to be fully fused with the resin, so that the melamine product has a rough surface, and the beauty and the use are influenced; the effect of the wood fiber is poor, although the fibrilia has the best effect at high temperature, the initial whiteness of the fibrilia is low, the whiteness of a melamine product cannot meet the requirement of a client, and the effect of the cotton fiber is second to that of the fibrilia, and the whiteness value of the cotton fiber is also high, so that the mixture of the fibrilia and the cotton fiber is selected to meet the requirement on whiteness, and the fibrilia is not easy to discolor at high temperature.
Claims (4)
1. The heat discoloration resistant non-wood fiber melamine powder is characterized in that the molding compound for melamine tableware comprises the following components in percentage by mass:
60-70% of melamine formaldehyde resin
20 to 30 percent of fiber
0.1 to 0.5 percent of curing agent
3 to 10 percent of dispersant
Titanium dioxide 1.0-1.5%
Pigment replenishment
The components are based on one hundred mass percent; the fiber is composed of at least one of glass fiber, cotton fiber and hemp fiber.
2. The thermochromic non-wood fiber melamine powder according to claim 1, wherein the molding compound for melamine tableware comprises the following components in percentage by mass:
melamine formaldehyde resin 70%
25 percent of fiber
0.1 percent of curing agent
3 percent of dispersant
1.0 percent of titanium dioxide
Pigment replenishment
The components are based on one hundred mass percent; the fiber is composed of at least one of glass fiber, cotton fiber and hemp fiber.
3. A method for preparing the anti-thermochromic non-wood fiber melamine powder according to claim 1 or 2, wherein the method comprises the steps of:
(1) adding a formaldehyde solution into a reaction kettle, and adding sodium hydroxide to adjust the pH value to 7-10;
(2) starting to heat, adding melamine, heating to 80-100 ℃ and reacting;
(3) and (3) reaction end point: testing the resin with water at 4 ℃ to obtain white precipitate;
(4) adding triethanolamine, adjusting pH, terminating the reaction, and cooling to 70 deg.C;
(5) kneading: adding fibers, a dispersing agent, a curing agent and the prepared resin into a Z-type low-speed kneader, kneading, changing the stirring direction at regular time, and stirring uniformly;
(6) and (3) drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at the temperature of 80-85 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3-4 hours;
(7) crushing and ball-milling: the materials are crushed and then enter a ball mill for ball milling for 3-8 hours, and dispersing agents, curing agents, pigments and the like are added in the process to meet the requirements of material densification, color matching, solidification fluidity control and the like, a ball mill jacket needs to be cooled by cooling water, and the temperature of the materials is not higher than 50 ℃;
(8) packaging: packaging the ground material with 25Kg lining film paper bag after passing through a 60-mesh screen, and storing the finished product in a cool and dry place.
4. The method for preparing the anti-thermochromic non-wood fiber melamine powder according to claim 3, wherein:
in the step (1), the pH value is adjusted to 8.5 by adding sodium hydroxide;
in the step (2), melamine is added, and the temperature is raised to 85 ℃ for reaction;
in the step (6), drying: a multi-section mesh belt hot air oven is adopted, hot air drying is carried out at 83.5 ℃, the drying is uniform, the moisture content is controlled to be below 3.5 percent, and the drying time is about 3.5 hours;
in the step (7), crushing and ball milling: the materials are crushed and then enter a ball mill for ball milling for 6 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919923.XA CN110938283A (en) | 2019-09-26 | 2019-09-26 | Thermochromic non-wood fiber melamine powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910919923.XA CN110938283A (en) | 2019-09-26 | 2019-09-26 | Thermochromic non-wood fiber melamine powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110938283A true CN110938283A (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910919923.XA Pending CN110938283A (en) | 2019-09-26 | 2019-09-26 | Thermochromic non-wood fiber melamine powder |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002000429A1 (en) * | 2000-06-21 | 2002-01-03 | Agrolinz Melamin Gmbh | Fibre composites with excellent dimensional stability, weather resistance and flameproofing properties |
| JP2006161023A (en) * | 2004-07-09 | 2006-06-22 | Nippon Carbide Ind Co Inc | Composition for molding melamine-based resin and molded article |
-
2019
- 2019-09-26 CN CN201910919923.XA patent/CN110938283A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002000429A1 (en) * | 2000-06-21 | 2002-01-03 | Agrolinz Melamin Gmbh | Fibre composites with excellent dimensional stability, weather resistance and flameproofing properties |
| JP2006161023A (en) * | 2004-07-09 | 2006-06-22 | Nippon Carbide Ind Co Inc | Composition for molding melamine-based resin and molded article |
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Application publication date: 20200331 |
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