CN105038119A - Manufacturing method of melamine inner container of water closet - Google Patents
Manufacturing method of melamine inner container of water closet Download PDFInfo
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- CN105038119A CN105038119A CN201510381223.1A CN201510381223A CN105038119A CN 105038119 A CN105038119 A CN 105038119A CN 201510381223 A CN201510381223 A CN 201510381223A CN 105038119 A CN105038119 A CN 105038119A
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Abstract
The invention discloses a manufacturing method of a melamine inner container of a water closet. The manufacturing method comprises the following steps: adding 100 parts by weight of melamine into 100-150 parts by weight of formaldehyde, carrying out reactions, then adding a lubricant to obtain high-fluidity melamine-formaldehyde resin; adding 20 to 40 parts by weight of cellulose into 100 parts by weight of melamine-formaldehyde resin, adding a hardening agent, after curing and drying, grinding the resin into powder to obtain a semi-finished product; adding a whitening agent into the semi-finished product, grinding, sieving to obtain melamine powder; and finally heating and softening the melamine powder to obtain the inner container. The provided melamine inner container has the advantages of high impact-resistant strength and notch strength, good fluidity, and high glossiness.
Description
Technical field
The present invention relates to chemical technology field, be specifically related to a kind of preparation method of melamine sitting wc pan inner bag.
Background technology
In sanitary ware manufacturing, traditional method uses pottery to manufacture toilet, pottery manufacture toilet has acid-alkali-corrosive-resisting, surface hardness is high, advantages such as rub resistance, scuffing, but also have transport to install the shortcoming such as heavy, frangible.The production process of pottery also has discharge to the pollution of environment in addition, and waste and old ceramic toilet can not be recycled and be difficult to process.With plastics with injection or compacting, plastics sucking moulding explained hereafter make toilet, there is production efficiency high, size is accurate, the advantages such as production cost is low, and production process produce waste product and waste and old plastic toilet also can recycle, plastic toilet also has easy transportation and installation, not easily the advantage such as broken.
Due to plastics molding process, toilet is generally made up of following parts, and on water tank and base, circle body can as a whole parts, run channel part, toilet base, inner bag parts, blowdown siphon pipe fitting etc.The structure of toilet base is the oval drum at the bottom of a similar band, base is suitable for reading be larger ellipse and with inner bag assembly connection, end opening is less ellipse and is with at the bottom of bucket, and the inner bag of base installation suitable for reading, in order to accept ight soil.
Cleaning water in water tank rinses inner bag by metalling run out, and dirt flows to the sewer line of buildings by the blowdown siphon pipe fitting of inner bag.The material of existing manufacture plastic squatting pan inner container, has the thermoplastic materials such as PMMA, ABS, polypropylene, also has general melmac Moulding powder, take unsaturated polyester resin as thermosetting material such as the SMC sheet molding compounds of matrix resin.Melmac is also called terpolycyantoamino-formaldehyde resin, the inner bag made with melmac Moulding powder, there is excellent antipollution, scrape resistant scratch, etc. surface property.But melmac Moulding powder makes small pieces such as tableware etc., too much requirement be there is no to the physical strength of goods, a-Mierocrystalline cellulose in Moulding powder also can play certain enhancement, and for making this larger product of toilet inner bag, just need while meeting product surface performance requriements, there is better mechanical property, especially increase in resistance to impact shock, flexural strength, especially require that the fragility of goods and mobility make moderate progress.Mobility refers to, pours in mould the degree being full of mould after material softens into, whether quick and completely can be full of mould, and and gap between mould little; The mobility of such as water, higher than emulsion, identical inclined-plane is poured water and emulsion into, and water can rapid rundown, and the velocity of flow of emulsion is slow, poor fluidity.
Therefore, making toilet inner bag with melamine plastics needs a kind of new method, makes melmac moulding material have good heat transfer, flow characteristics, makes to have good mould pressing process performance.
Summary of the invention
The object of this invention is to provide the face melamine sitting wc pan inner bag that a kind of surface has high workability and high brightness.
For reaching above-mentioned purpose, providing a kind of making method of melamine sitting wc pan inner bag in one embodiment of the present of invention, comprising the following steps:
Prepare melamine:
(1), by weight part be that the trimeric cyanamide of 100 parts joins in the formaldehyde of 120 parts ~ 150 parts and reacts, then add the terpolycyantoamino-formaldehyde resin that lubricant obtains high workability;
(2), in 100 parts of terpolycyantoamino-formaldehyde resins, add 20 parts ~ 25 parts Mierocrystalline celluloses, and add stiffening agent, be broken into powder obtain work in-process through gel, ovendry power;
(3), in work in-process add whitening agent, sieving after grinding obtains melamine;
Prepare inner bag:
By pre-for melamine thermal softening, then pour in mould and solidify, after sanding and polishing, obtain melamine inner bag.
In optimal enforcement example of the present invention, in the process preparing melamine, the pH value of described reaction is 7 ~ 9.
Lubricant is glyceryl monostearate, and its add-on is 3 parts ~ 5 parts, and stiffening agent is the mixture of ammonium chloride and sulfuric acid, and add-on is 1 ~ 2 part, containing ammonium chloride 1 ~ 5mol in every kilogram, calculates 1 ~ 5mol containing sulfuric acid according to sulfate radical.The time of melamine preheating is 60 seconds ~ 80 seconds.Solidification value is 145 DEG C ~ 170 DEG C, and pressure is 150kgf ~ 200kgf, and set time is 150 seconds ~ 220 seconds.The add-on adding whitening agent in work in-process is 2% ~ 5% of semi-manufactured goods quality.The temperature of the pre-thermal softening of melamine is 70 DEG C ~ 90 DEG C.
In sum, the present invention has the following advantages:
Production technique of the present invention is simple, and operating process is easy to control, and makes the product suppressed have excellent mobility, the surface of high brightness, and has increased substantially shock strength and the flexural strength of sitting wc pan inner bag.
Embodiment
Embodiment 1
Prepare melamine sitting wc pan inner bag, comprise the following steps:
(1), by weight part be that the trimeric cyanamide of 100kg joins in the formaldehyde of 140kg and reacts, regulate pH to 8.5, then add the terpolycyantoamino-formaldehyde resin that 4kg lubricant glyceryl monostearate obtains high workability;
(2), in 100 parts of terpolycyantoamino-formaldehyde resins, 20kg alpha-cellulose is added, the stiffening agent added is the mixing solutions of ammonium chloride and sulfuric acid, the concentration of Chlorine in Solution ammonium is 2mol/L, the concentration of sulfuric acid is 1mol/L, the amount adding stiffening agent is 1kg, is broken into powder obtains work in-process through gel, ovendry power;
(3), in 100kg work in-process, add whitening agent titanium dioxide 2.5kg, sieve after grinding and obtain melamine.
(4), by melamine pre-thermal softening 60 seconds under 75 DEG C of conditions, then pour in mould and solidify, solidification value is 150 DEG C, and working pressure is 150kgf, and set time is 150 seconds; Naturally cooling after solidification, obtains melamine inner bag after sanding and polishing.
Embodiment 2
Prepare melamine sitting wc pan inner bag, comprise the following steps:
(1), by weight part be that the trimeric cyanamide of 100kg joins in the formaldehyde of 120kg and reacts, regulate pH to 7.5, then add the terpolycyantoamino-formaldehyde resin that 5kg lubricant glyceryl monostearate obtains high workability;
(2), in 100 parts of terpolycyantoamino-formaldehyde resins, 25kg alpha-cellulose is added, the stiffening agent added is the mixing solutions of ammonium chloride and sulfuric acid, wherein the mol ratio of ammonium chloride and sulfuric acid is 1 ~ 5:1 ~ 5, and add-on is 2kg, is broken into powder obtains work in-process through gel, ovendry power;
(3), in 100kg work in-process, add whitening agent titanium dioxide 3.5kg, sieve after grinding and obtain melamine.
(4), by melamine pre-thermal softening 80 seconds under 75 DEG C of conditions, then pour in mould and solidify, solidification value is 170 DEG C, and working pressure is 180kgf, and set time is 190 seconds; Naturally cooling after solidification, obtains melamine inner bag after sanding and polishing.
Embodiment 3
Prepare melamine sitting wc pan inner bag, comprise the following steps:
(1), by weight part be that the trimeric cyanamide of 100kg joins in the formaldehyde of 140kg and reacts, regulate pH to 8.5, obtain terpolycyantoamino-formaldehyde resin;
(2), in 100 parts of terpolycyantoamino-formaldehyde resins add 40kg alpha-cellulose, add stiffening agent 1kg, be broken into powder obtain work in-process through gel, ovendry power;
(3), in 100kg work in-process, add whitening agent titanium dioxide 4kg, sieve after grinding and obtain melamine.
(4), by melamine pre-thermal softening 60 seconds under 75 DEG C of conditions, then pour in mould and solidify, solidification value is 150 DEG C, and working pressure is 150kgf, and set time is 150 seconds; Naturally cooling after solidification, obtains melamine inner bag after sanding and polishing.
Embodiment 4
Prepare melamine sitting wc pan inner bag, comprise the following steps:
(1), by weight part be that the trimeric cyanamide of 100kg joins in the formaldehyde of 140kg and reacts, regulate pH to 8.5, then add the terpolycyantoamino-formaldehyde resin that 4kg lubricant glyceryl monostearate obtains high workability;
(2), in 100 parts of terpolycyantoamino-formaldehyde resins add stiffening agent, the stiffening agent 1kg added, be broken into powder obtain work in-process through gel, ovendry power;
(3), in 100kg work in-process add titanium dioxide 3kg, sieving after grinding obtains melamine.
(4), by melamine pre-thermal softening 60 seconds under 75 DEG C of conditions, then pour in mould and solidify, solidification value is 150 DEG C, and working pressure is 150kgf, and set time is 150 seconds; Naturally cooling after solidification, obtains melamine inner bag after sanding and polishing.
Test example:
1, the terpolycyantoamino-formaldehyde resin in embodiment 1 and embodiment 3 is carried out fluidity testing, through contrast, melamine resin mobility in embodiment 1 is better, terpolycyantoamino-formaldehyde resin mobility in embodiment 3 is poor, as can be seen here, add in the embodiment of lubricant and can improve mobility.
2, the melamine inner bag in embodiment 1 and embodiment 4 carries out strength test, detects its notched Izod impact hit intensity and degree of deflection resistance.Notched Izod impact hit intensity wherein in embodiment 1 has significant difference with degree of deflection resistance compared with embodiment 4, and the melamine inner bag intensity in embodiment 1 is higher, illustrates and adds the bulk strength that Mierocrystalline cellulose can improve melamine inner bag.
Claims (9)
1. a making method for melamine sitting wc pan inner bag, comprises the following steps:
Prepare melamine:
(1), by weight part be that the trimeric cyanamide of 100 parts joins in the formaldehyde of 100 parts ~ 150 parts and reacts, then add the terpolycyantoamino-formaldehyde resin that lubricant obtains high workability;
(2), in 100 parts of terpolycyantoamino-formaldehyde resins, add 20 parts ~ 40 parts Mierocrystalline celluloses, and add stiffening agent, be broken into powder obtain work in-process through gel, ovendry power;
(3), in work in-process add whitening agent, sieving after grinding obtains melamine;
Prepare inner bag:
By pre-for melamine thermal softening, then pour in mould and solidify, after sanding and polishing, obtain melamine inner bag.
2. the method for claim 1, is characterized in that: in the process preparing melamine, and the pH value of described reaction is 7 ~ 9.
3. the method for claim 1, is characterized in that: described lubricant is glyceryl monostearate.
4. the method for claim 1, is characterized in that: the add-on of described lubricant is 3 parts ~ 5 parts.
5. the method for claim 1, is characterized in that: described stiffening agent is the mixture of ammonium chloride and sulfuric acid, and add-on is 1 part ~ 2 parts.
6. the method for claim 1, is characterized in that: the time of described melamine preheating is 60 seconds ~ 80 seconds.
7. the method for claim 1, is characterized in that: adding whitening agent in described work in-process is titanium dioxide, and consumption is 2% ~ 5% of work in-process weight.
8. the method for claim 1, is characterized in that: the temperature of the pre-thermal softening of described melamine is 70 DEG C ~ 90 DEG C.
9. the method for claim 1, is characterized in that: described solidification value is 145 DEG C ~ 170 DEG C, and pressure is 150kgf ~ 200kgf, and set time is 150 seconds ~ 220 seconds.
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| CN201510381223.1A CN105038119A (en) | 2015-07-03 | 2015-07-03 | Manufacturing method of melamine inner container of water closet |
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| CN201510381223.1A CN105038119A (en) | 2015-07-03 | 2015-07-03 | Manufacturing method of melamine inner container of water closet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105690640A (en) * | 2016-01-29 | 2016-06-22 | 张楠希 | Device and method for preparing melamine porcelain-imitating sanitary fittings |
| CN108084475A (en) * | 2017-12-20 | 2018-05-29 | 贺州宝兴新材料有限公司 | The production technology of melamine dishware |
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| US20020034906A1 (en) * | 1996-05-02 | 2002-03-21 | Heinz Berbner | Flame-proof fabrics based on melamine resin fibers |
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| 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 |
| CN102604325A (en) * | 2012-03-14 | 2012-07-25 | 沙县宏盛塑料有限公司 | Tripolycyanamide formaldehyde moulding compound and preparation method thereof |
| CN102702676A (en) * | 2012-05-14 | 2012-10-03 | 刘旭祥 | Composite modified potassium titanate whisker for manufacturing inner container of toilet stool and preparing method thereof |
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2015
- 2015-07-03 CN CN201510381223.1A patent/CN105038119A/en active Pending
Patent Citations (5)
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| US20020034906A1 (en) * | 1996-05-02 | 2002-03-21 | Heinz Berbner | Flame-proof fabrics based on melamine resin fibers |
| CN101585953A (en) * | 2009-06-23 | 2009-11-25 | 中国林业科学研究院林产化学工业研究所 | Method for preparing melamine formaldehyde molding compound |
| 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 |
| CN102604325A (en) * | 2012-03-14 | 2012-07-25 | 沙县宏盛塑料有限公司 | Tripolycyanamide formaldehyde moulding compound and preparation method thereof |
| CN102702676A (en) * | 2012-05-14 | 2012-10-03 | 刘旭祥 | Composite modified potassium titanate whisker for manufacturing inner container of toilet stool and preparing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105690640A (en) * | 2016-01-29 | 2016-06-22 | 张楠希 | Device and method for preparing melamine porcelain-imitating sanitary fittings |
| CN108084475A (en) * | 2017-12-20 | 2018-05-29 | 贺州宝兴新材料有限公司 | The production technology of melamine dishware |
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