CN101804378A - Polyvinyl alcohol micropowder-type dry powder production process with high product yield - Google Patents
Polyvinyl alcohol micropowder-type dry powder production process with high product yield Download PDFInfo
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- CN101804378A CN101804378A CN 201010115006 CN201010115006A CN101804378A CN 101804378 A CN101804378 A CN 101804378A CN 201010115006 CN201010115006 CN 201010115006 CN 201010115006 A CN201010115006 A CN 201010115006A CN 101804378 A CN101804378 A CN 101804378A
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- polyvinyl alcohol
- micropowder
- dry powder
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Abstract
The invention provides a polyvinyl alcohol micropowder-type dry powder production process with a high product yield, and belongs to the technical field of ultra micro grinding. The process is characterized in that: the polyvinyl alcohol undergoes multistage separation and quick deep cooling treatment for several times to obtain multiple cold shortness; and the polyvinyl alcohol with the cold shortness is ground for several times by using ultra micro grinding equipment and adopting a high-speed air flow impact method to obtain the polyvinyl alcohol micropowder-type dry powder, of which the fineness is over 120 meshes. The process has the advantages that: the production process of the polyvinyl alcohol micropowder-type dry powder is a physical process, the products and the raw materials have no essential change, but geometrical change, namely big particles are changed into micropowder; other matters are unnecessarily added in the production process; and the product does not contain matters harmful to human body and environment. The grinding fineness of the polyvinyl alcohol is over 120 meshes, the yield of the ultra micropowder is over 95 percent, the production efficiency is greatly improved, the yield is improved from 20 percent up to 95 percent, the polyvinyl alcohol is made into the micropowder-type dry powder, and the polyvinyl alcohol is convenient for storage and transportation and can be fully dissolved at normal temperature, so that the polyvinyl alcohol can be used much conveniently.
Description
Technical field
Belong to ultra tiny pulverizing technical field.
Background technology
Polyvinyl alcohol is a kind of synthesized polymer material with good adhesive property, is used widely as building glue in building materials field.Because there are shortcomings such as dissolving difficulty (need heating and constantly could dissolve under the stirring condition), solubility are little in the bulky grain polyvinyl alcohol, directly the glue use is built in conduct.Must make glue just can be used for putty, coating etc. and use at building material product.
Traditional preparation glue method is after polyvinyl alcohol is made polyvinyl formal class glue (i.e. 107 glue), uses for joining putty and coating.Contain auxiliary agents such as free formaldehyde, mould inhibitor, antirust agent because of in 107 glue, these materials all are harmful to human body and environment.In July calendar year 2001, the Ministry of Construction clearly proposes to ban use of polyvinyl formal class glue (i.e. 107 glue), requires the substitute products of exploitation 107 glue.
Experiment is found, the polyvinyl alcohol of indissoluble is handled the back by superfine communication technique become the fine Powdered solubility property fast that has, its dissolubility is relevant with granular size, the particle of polyvinyl alcohol is thin more, its specific area is big, and dry powder building materials production process mixing of materials performance is good, and the thin more dissolution velocity of particle is fast more, have good workability, presentation quality is good.
It is good that granular size is generally controlled greater than 120 orders, and people attempt with traditional eddy current crushing technology in polyvinyl alcohol, but when fineness is 120 orders, and yield is only about 20%, the production cost height, and efficient is low.
Summary of the invention
The invention provides a kind of formaldehydes material that do not contain, and transportation, store and use all conveniently, can substitute the use of 107 glue, and fineness is greater than 120 orders, yield is high, the production technology of the fine PVA powder that can obtain high product yield that is suitable for producing.
The technical scheme that the present invention takes:
Can obtain the production technology of the fine PVA powder of high product yield, its scheme is: with the polyvinyl alcohol multi-stage separation, repeatedly quick deep cooling, make polyvinyl alcohol repeatedly have a cold brittleness, clash into method by ultramicro grinding equipment with high velocity air, the polyvinyl alcohol of cold brittleness is repeatedly pulverized, become the detailed catalogue degree greater than 120 fine PVA powder.
Good effect behind enforcement the present invention: polyvinyl formal class glue production process is a chemical process, and product and raw material have the variation of matter.It is need add the material that human body and environment all are harmful to by producing and storing.
The production process of no-solvent type dry powder polyvinylalcohol microsphere arogel stick is a physical process, product and raw material do not have the variation of matter, have only geometry to change (promptly becoming the polyvinyl alcohol micro mist) by the bulky grain polyvinyl alcohol, production process does not need to add other materials, does not exist in the product human body and the harmful material of environment.
Polyvinyl alcohol is a kind of thermal plastic material, do not have the cooling system of material and is difficult to get rid of in the crushing process shortcomings such as heat that produced because of " superfine communication technique " of routine, therefore material can not reach the ultramicro grinding condition of carrying out at low temperatures, the fineness of pulverizing does not reach greater than 80 purpose requirements, though can use reluctantly, but production efficiency low (yield is about 20%) production cost height, the present invention adopts the air cooling technology, material cooling system and the cooling effect that improves reducing mechanism have been increased, improve the fineness of ultramicro grinding efficient and product, the polyvinyl alcohol smashing fineness can reach more than 120～200 orders, ultra micro powder yield can reach 95%, and production efficiency greatly improves, and is 20% from original yield, bring up to 95% now, polyvinyl alcohol becomes micro mist shape dry powder, and convenient the storage and transportation can fully be dissolved at normal temperatures, it is also extremely convenient to use, and does not wherein have noxious material.
The specific embodiment
Can obtain the production technology of the fine PVA powder of high product yield, its scheme is: with the polyvinyl alcohol multi-stage separation, repeatedly quick deep cooling, make polyvinyl alcohol repeatedly have a cold brittleness, clash into method by ultramicro grinding equipment with high velocity air, the polyvinyl alcohol of cold brittleness is repeatedly pulverized, become the detailed catalogue degree greater than 120 fine PVA powder.Concrete steps are as follows:
(1) the polyvinyl alcohol raw material is selected;
(2) quick deep cooling;
(3) the high velocity air bump is pulverized first;
(4) the bulky grain solid reclaims;
(5) continue quick deep cooling;
(6) the high velocity air bump is pulverized once more;
(7) select the detailed catalogue degree greater than 120 purpose powder;
(8) packing.
Described quick deep cooling is that temperature is lower than negative 100 ℃.
Described high velocity air is that engine speed is more than 4500 rev/mins.
Claims (3)
1. can obtain the production technology of the fine PVA powder of high product yield, it is characterized in that: with the polyvinyl alcohol multi-stage separation, repeatedly quick deep cooling, make polyvinyl alcohol repeatedly have a cold brittleness, clash into method by ultramicro grinding equipment with high velocity air, the polyvinyl alcohol of cold brittleness is repeatedly pulverized, and concrete steps are as follows:
(1) the polyvinyl alcohol raw material is selected;
(2) quick deep cooling;
(3) the high velocity air bump is pulverized first;
(4) the bulky grain solid reclaims;
(5) continue quick deep cooling;
(6) the high velocity air bump is pulverized once more;
(7) select the detailed catalogue degree greater than 120 purpose powder;
(8) packing.
2. method according to claim 1 is characterized in that: described quick deep cooling is that temperature is lower than negative 100 ℃.
3. method according to claim 1 is characterized in that: described high velocity air is that engine speed is more than 4500 rev/mins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010115006 CN101804378A (en) | 2010-03-01 | 2010-03-01 | Polyvinyl alcohol micropowder-type dry powder production process with high product yield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010115006 CN101804378A (en) | 2010-03-01 | 2010-03-01 | Polyvinyl alcohol micropowder-type dry powder production process with high product yield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101804378A true CN101804378A (en) | 2010-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201010115006 Pending CN101804378A (en) | 2010-03-01 | 2010-03-01 | Polyvinyl alcohol micropowder-type dry powder production process with high product yield |
Country Status (1)
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| CN (1) | CN101804378A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157541A (en) * | 2013-03-26 | 2013-06-19 | 上海金树树脂粉末有限公司 | Production process for crushing thermoplastic high-molecular materials |
| CN104841544A (en) * | 2015-06-02 | 2015-08-19 | 天华化工机械及自动化研究设计院有限公司 | Nitrogen gas sealed circulating PVA powder processing method |
| CN109836597A (en) * | 2017-11-28 | 2019-06-04 | 朱建军 | Cotton-shaped expanded polyethylene alcohol and preparation method thereof |
| CN111333874A (en) * | 2020-03-13 | 2020-06-26 | 宁夏颐星新材料科技有限公司 | Production process of polyvinyl alcohol ultrafine powder |
| CN112026052A (en) * | 2020-09-02 | 2020-12-04 | 哈尔滨工业大学 | Preparation method of superfine polyvinyl alcohol particles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04301409A (en) * | 1991-03-29 | 1992-10-26 | Shin Etsu Polymer Co Ltd | Manufacture of polyvinyl alcohol base molded form |
| CN1740213A (en) * | 2005-07-21 | 2006-03-01 | 上海金树树脂粉末有限公司 | Production process of fine PVA powder for building material |
-
2010
- 2010-03-01 CN CN 201010115006 patent/CN101804378A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04301409A (en) * | 1991-03-29 | 1992-10-26 | Shin Etsu Polymer Co Ltd | Manufacture of polyvinyl alcohol base molded form |
| CN1740213A (en) * | 2005-07-21 | 2006-03-01 | 上海金树树脂粉末有限公司 | Production process of fine PVA powder for building material |
Non-Patent Citations (2)
| Title |
|---|
| 《广东建材》 20090930 王斌等 常温下剪切磨制备聚乙烯醇微粉 132-133 1-3 , 第9期 2 * |
| 《石化技术与应用》 20060731 李忠容 深冷法制备聚乙烯醇粉末 316-318 1-3 第24卷, 第4期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157541A (en) * | 2013-03-26 | 2013-06-19 | 上海金树树脂粉末有限公司 | Production process for crushing thermoplastic high-molecular materials |
| CN104841544A (en) * | 2015-06-02 | 2015-08-19 | 天华化工机械及自动化研究设计院有限公司 | Nitrogen gas sealed circulating PVA powder processing method |
| CN109836597A (en) * | 2017-11-28 | 2019-06-04 | 朱建军 | Cotton-shaped expanded polyethylene alcohol and preparation method thereof |
| CN111333874A (en) * | 2020-03-13 | 2020-06-26 | 宁夏颐星新材料科技有限公司 | Production process of polyvinyl alcohol ultrafine powder |
| CN112026052A (en) * | 2020-09-02 | 2020-12-04 | 哈尔滨工业大学 | Preparation method of superfine polyvinyl alcohol particles |
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Open date: 20100818 |