CN103909588B - Metallized polypropylene films for electrical purposes give up the recoverying and utilizing method of film - Google Patents
Metallized polypropylene films for electrical purposes give up the recoverying and utilizing method of film Download PDFInfo
- Publication number
- CN103909588B CN103909588B CN201410090782.2A CN201410090782A CN103909588B CN 103909588 B CN103909588 B CN 103909588B CN 201410090782 A CN201410090782 A CN 201410090782A CN 103909588 B CN103909588 B CN 103909588B
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- China
- Prior art keywords
- film
- cleaning solution
- electrical purposes
- films
- recoverying
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The present invention relates to a kind of metallized polypropylene films for electrical purposes to give up the recoverying and utilizing method of film, useless film is cut into film fragments, puts into dilute sulfuric acid cleaning solution, soak and stir 8 ~ 10 hours, maintain cleaning solution pH 2.6 ~ 2.7; Rinse with water again, dry, make the polypropylene particles that can be used as films for electrical purposes raw material.The polypropylene particles reclaimed can be used as polypropylene films for electrical purposes or capacitor plastic fittings raw material, and coated metal can obtain effective recycling, can economize on resources, little to ambient influnence.Treatment process is simple, and easily operate, processing cost is low.
Description
Technical field
The present invention relates to a kind of metallized polypropylene films for electrical purposes to give up the recoverying and utilizing method of film.
Background technology
Metallized polypropylene films for electrical purposes make capacitor primary raw material.Metallized polypropylene films for electrical purposes due in plated film production process, due to the reason such as equipment fault, operate miss, inevitably produce useless film; In addition, also produce the leftover pieces needing in a large number to cut formation in capacitor production process, these leftover pieces cannot be utilized aborning and be formed useless film.This useless film accounts for 3% of total amount.For Anhui Tongfeng Electronic Co. Ltd., produce all kinds of metallized polypropylene films for electrical purposes about 2200 tons per year, about produce useless film 66 tons.Owing to useless film there being one deck mainly zinc-aluminium coat of metal, this useless film is made to be difficult to be utilized as films for electrical purposes.Usually these useless films deliver to plastic processing enterprise by the company of recovery, add in other plastics, as the plastic packaging bag that manufacturing value is cheap, polypropylene could not be utilized effectively, cause the waste of resource; Meanwhile, coated metal is not also utilized effectively, and even can bring environmental pollution.
Summary of the invention
The object of this invention is to provide a kind of metallized polypropylene films for electrical purposes to give up the recoverying and utilizing method of film, reclaiming gained polypropylene material can be re-used as the raw material of processing films for electrical purposes, can economize on resources.
Recoverying and utilizing method of the present invention comprises the steps:
(1) useless film is sheared grow up and the wide film fragments being all no more than 1m stand-by;
(2) above-mentioned film fragments is put into the cleaning solution that sulfuric acid concentration is 15 ~ 30%, soak and stir 8 ~ 10 hours, maintain cleaning solution pH 2.6 ~ 3;
(3) film fragments after immersion taken out from cleaning solution and rinse with water, removing the cleaning solution of remained on surface;
(4) by clean after film fragments dry;
(5) polypropylene particles that can be used as films for electrical purposes or capacitor plastic fittings raw material is made according to a conventional method.
Because polypropylene acid resistance is good, can not be corroded by diluted acid, therefore, be immersed in dilute sulfuric acid by useless film, the coat of metal is corroded by diluted acid and departs from film, enters in cleaning solution.
Usually, containing metallic aluminium in various metals polypropylene films for electrical purposes, in order to accelerate the corrosion of metallic aluminium, improving clean result, adding NaCl in the cleaning solution of step (2), control Cl
-with SO
4 2-mol ratio in 1:100 ~ 1000.Cl
-existence, effectively can promote H
+directly react with aluminium atom, accelerate pickling process.
The cleaning solution of step (2) take from during sulfuric acid method titanium pigment is produced produce, sulfuric acid concentration is the titanium white waste acid of 18 ~ 22%.
Corresponding metallurgical works is sent to recycle after remaining cleaning solution is concentrated; Or with alkali neutralization, filter, obtain the solid slag containing zinc hydroxide, aluminium hydroxide, then send corresponding metallurgical works to recycle, little to ambient influnence.
The present invention adopts dilute sulfuric acid carrying out washing treatment metallized polypropylene films for electrical purposes to give up film, the polypropylene particles zinc-aluminium residual metal level reclaimed is less than 15g/kg, polypropylene films for electrical purposes or the use of capacitor plastic fittings raw material can be used as, and coated metal can obtain effective recycling, can economize on resources, little to ambient influnence.And treatment process is simple, easily operate, processing cost is low.
Detailed description of the invention
The inventive method is as follows:
(1) old metal polypropylene screen is sheared grow up and the wide film fragments being all no more than 1m stand-by;
(2) above-mentioned film fragments is put into the dilute sulfuric acid cleaning solution that concentration is 15 ~ 30%, soak and stir 8 ~ 10 hours, supplement dilute sulfuric acid in washing process to maintain cleaning solution pH 2.6 ~ 3;
(3) film fragments after immersion taken out from cleaning solution and rinse with water, removing the cleaning solution of remained on surface;
(4) by clean after film fragments dry;
(5) polypropylene particles that can be used as films for electrical purposes or the capacitor such as shell, positioning sleeve plastic fittings raw material is made according to a conventional method.
The film that given up by metallized polypropylene film cuts into film fragments, is conducive to accelerating weak acid scrubbing and water washing operations.
NaCl is added in the cleaning solution of above-mentioned steps (2), to accelerate the corrosion of metallic aluminium, control Cl
-with SO
4 2-mol ratio in 1:100 ~ 1000.NaCl can adopt Nacl.
Desirable that produce in sulfuric acid process titanium white production, the sulfuric acid concentration of the cleaning solution of above-mentioned steps (2) is the titanium white waste acid of 18 ~ 22%, is not only conducive to digesting titanium white waste acid, can also reduces processing cost further.
Claims (2)
1. metallized polypropylene films for electrical purposes give up the recoverying and utilizing method of film, comprise the steps:
(1) useless film is sheared grow up and the wide film fragments being all no more than 1m stand-by;
(2) in concentration be 15 ~ 30% dilute sulfuric acid cleaning solution in add NaCl, control Cl
-with SO
4 2-mol ratio in 1:100 ~ 1000, above-mentioned film fragments is put into cleaning solution, soaks and stir 8 ~ 10 hours, maintain cleaning solution pH 2.6 ~ 3;
(3) film fragments after immersion taken out from cleaning solution and rinse with water, removing the cleaning solution of remained on surface;
(4) by clean after film fragments dry;
(5) polypropylene particles that can be used as films for electrical purposes or capacitor plastic fittings raw material is made according to a conventional method.
2. metallized polypropylene films for electrical purposes according to claim 1 give up the recoverying and utilizing method of film, it is characterized in that: the cleaning solution of step (2) take from during sulfuric acid method titanium pigment is produced produce, sulfuric acid concentration is the titanium white waste acid of 18 ~ 22%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090782.2A CN103909588B (en) | 2014-03-12 | 2014-03-12 | Metallized polypropylene films for electrical purposes give up the recoverying and utilizing method of film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090782.2A CN103909588B (en) | 2014-03-12 | 2014-03-12 | Metallized polypropylene films for electrical purposes give up the recoverying and utilizing method of film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103909588A CN103909588A (en) | 2014-07-09 |
| CN103909588B true CN103909588B (en) | 2016-04-20 |
Family
ID=51035741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410090782.2A Expired - Fee Related CN103909588B (en) | 2014-03-12 | 2014-03-12 | Metallized polypropylene films for electrical purposes give up the recoverying and utilizing method of film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103909588B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108556189B (en) * | 2017-03-27 | 2020-07-10 | 台州市炎发再生物资有限公司 | Particle processing device for recycled plastic |
| BR112022001150A2 (en) * | 2019-07-26 | 2022-03-15 | Borealis Ag | Method for removing paint or other foreign material from the surface of an article |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423908A (en) * | 2011-11-23 | 2012-04-25 | 成都东航塑胶有限公司 | Method for plastic recovery and plastic particle processing |
-
2014
- 2014-03-12 CN CN201410090782.2A patent/CN103909588B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423908A (en) * | 2011-11-23 | 2012-04-25 | 成都东航塑胶有限公司 | Method for plastic recovery and plastic particle processing |
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| Publication number | Publication date |
|---|---|
| CN103909588A (en) | 2014-07-09 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160420 Termination date: 20210312 |