CN1513656A - Cleaning composition containing EDTA used for cleaning die - Google Patents
Cleaning composition containing EDTA used for cleaning die Download PDFInfo
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- CN1513656A CN1513656A CNA2003101248858A CN200310124885A CN1513656A CN 1513656 A CN1513656 A CN 1513656A CN A2003101248858 A CNA2003101248858 A CN A2003101248858A CN 200310124885 A CN200310124885 A CN 200310124885A CN 1513656 A CN1513656 A CN 1513656A
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Abstract
The invention relates to a cleaning composition effective for the removal of coagulant residue from molds or formers used for forming latex articles. The cleaning composition is an aqueous solution containing ethylene diaminetetraacetate (EDTA) ions. The composition can be used alone, or as part of a system with one or more water baths and one or more ETDA, detergent or base containing baths, for the cleaning of formers or molds.
Description
Technical field
The present invention relates to a kind of cleaning combination, this cleaning combination can be removed the coagulating agent residue that is used on the latex product forming mould effectively.This cleaning combination is a kind of aqueous solution that contains edetate (EDTA) ion.Said composition can be used separately, perhaps uses with one or more tanks and the groove that contains one or more EDTA, washing agent or alkali completely, comes cleaning die or mould.
Background technology
Latex product as gloves, is by mould or mould are immersed coagulating agent, and then immerses that rubber latex makes.Latex is solidificated on the mould, then latex is peeled off the latex product that makes moulding.In order to be easy to stripping emulsion goods on mould or the mould, use releasing agent usually.Releasing agent traditionally is the acinous thing, as starch or calcium carbonate.Many recently release coatings with polymerization.
After in case latex product is peeled off from mould, the residue of calcic in the coagulating agent, and releasing agent polymerization or non-polymeric will remain on the mould.After being repeatedly used, begin to accumulate the latex that is clamminess on a small quantity on mould or the mould, and coagulating agent and releasing agent.Because the chelation of iron, this tunic makes the mould overstrike.For the continuous operation of production line, remove the pollution of coagulating agent, it is very important keeping the cleaning of mould or mould.
Be hot acid (example hydrochloric acid or nitric acid the are higher than 55 ℃) impregnation mold with at least 2% concentration in the prior art, and then mould immersed tank successively that alkali removes this tunic as 1% potassium hydroxide and last tank.Not hot as tartaric acid, ion-exchange is just invalid.
Clean an especially problem of textured mould.Have the cleaning of weavy grain mould to scrub, and smooth mould immersion cleaning solution just can have been cleaned.
At United States Patent (USP) 5,647, in 988, a kind of membrane separation plant of pottery is used to the purifying and the wastewater treatment of water.When this equipment is stopped up by organic matter, can use aqueous oxidizing agent solution (as clorox), acid, alkali, perhaps their mixture comes back scrubbing.
United States Patent (USP) 5,895,781 and 5,910,475, to have described and be used for for example cleaning combination of tank and water closet of pottery or porcelain surface, these surfaces are because mineral deposit and being stained.The metal complex that is formed by high oxidation attitude metal ion has caused mineral deposit.Contain sulfamic acid, arabo-ascorbic acid (as reducing agent), surfactant system in this cleaning combination, and the complex system of ethylenediamine tetra-acetic acid and citric acid.
Need a kind of method that can replace to come cleaning die, particularly a kind of method that does not need to use hot acid.Wonderful discovery is can remove the remaining film that is deposited on mould or the mould with the cleaning system that contains the EDTA ion.This cleaning system is used or without scouring, it all is effective heating or not heating.
Summary of the invention
An object of the present invention is to obtain does not a kind ofly need to scrub and removes the method for residual coagulating agent from mould.
Another object of the present invention is to soak by the short time in cleaning solution to obtain indivisible residue.
A further object of the present invention be do not need the heating just can cleaning die.
Cleaning system from mould or the residual coagulating agent of mould removal provided by the invention comprises:
A) first groove (a) contains the aqueous solution of EDTA, and the amount of wherein said EDTA is 0.1wt% to 30wt%; With
B) second groove (c) contains one or more cleaning agent aqueous solution of 0.5wt% to 15wt%, and this cleaning agent is selected from EDTA, washing agent, and alkali.
The present invention also provides the method for cleaning the mould or the mould that are used for the latex product moulding, and this method comprises:
A) mould or mould immersion are contained in the groove of EDTA;
B) selectively described mould or mould are immersed at least one tank;
C) selectively described mould or mould are immersed in second rinse bath, contain the aqueous solution of one or more cleaning agents of 0.5wt% to 2wt% in this rinse bath, this cleaning agent is selected from EDTA, washing agent, and alkali; With
D) selectively described mould or mould are immersed in last tank.
The present invention relates to a kind of method of removing the coagulating agent residue from the mould that is used for the latex product moulding.
Used in this article term EDTA refers to edetate, and it will be dissociated into ion in the aqueous solution.EDTA can be in conjunction with arbitrary gegenion, and preferred gegenion is a sodium.
In the process of preparation latex product, mould or mould are immersed in the coagulant solution, and then immerse in the rubber latex.Mould or mould are made by pottery or porcelain usually, can be smooth or textured.Coagulating agent impels latex to solidify, and forms a skim on mould or mould.Latex product is cured then, and peels off from mould.Some calcics and polymerization or non-polymeric coagulating agent residue can remain on the mould.
Cleaning system of the present invention is used to remove the coagulating agent residue on mould or the mould.The simplest form of this cleaning system is made up of single tank, is the aqueous solution that contains the cleaning combination of EDTA ion in the tank.The concentration of EDTA ion is the 0.1wt% to 30wt% based on whole composition solution.EDTA concentration is preferably 0.5wt% to 15wt%, more preferably 1wt% to 10wt%.
The compound that will contain EDTA adds formation EDTA solion in the entry.Preferred EDTA compound is an alkali metal salts or ammonium salt.Especially preferred salt is EDTA sodium salt and EDTA ammonium salt, perhaps their mixture.
Except EDTA ion and water, further contain the component that other help to clean mould or mould in first tank.These components comprise washing agent and alkali.
Have been found that it is favourable containing washing agent in first cleaning combination.Comprise the compound as washing agent or surfactant well known in the prior art at this used washing agent.The washing agent that is used for this cleaning combination comprises non-ionized, anionic, the surfactant of cationic and both sexes.Available surfactant comprises, but is not restricted to sodium alkyl benzene sulfonate, sodium lauryl ether sulphates, DEGMBE, nonyl phenol ethoxylate.If exist, the amount of washing agent is about half of EDTA weight, perhaps in detergent solids, accounts for the 0.005wt% to 15wt% of composition total in the tank.Detergent content is preferably 0.25wt% to 7.5wt%, more preferably 0.5wt% to 5wt%.
Alkali selectively is present in first tank, and its content is 0.01wt% to 10wt%, is preferably 0.5wt% to 2wt%.Alkali can be any inorganic base or organic base, or their mixture.Preferred alkali comprises potassium hydroxide, NaOH, ammonium hydroxide, or their mixture.
Preferred cleaning system comprises second groove, contains EDTA, alkali, washing agent in this groove, perhaps their mixture.An embodiment preferred is, in second groove or the EDTA/ detergent mixture, or alkali.Of the present invention one especially effectively embodiment be 2% to 6% EDTA and 1% to 3% washing agent.EDTA, washing agent and the alkali total concentration in second groove is 0.5wt% to 15wt%.
Have been found that if use second tank, can improve cleaning performance at first and second one or more tank of the middle use of rinse bath.
Before mould or mould are put back into production line go to prepare latex product, then last tank is arranged is favourable and preferred to last rinse bath.Can replace with the wet towel wiping.Water rinse, or towel wiping help to reduce the pollution of any residual chemicals.This makes mould or mould can use continuously on production line, and gloves do not have defective.
The water that desired is in all grooves keeps totally as far as possible, so that can as much as possible remove film.Have been found that warm water is more effective to removing film.60 ℃ water can reach reasonable cleaning performance, and cold water also is feasible.Find that also most residue breaks away from from mould in water, rather than in reactive tank.
Cleaning system of the present invention is used for not containing the latex product production line of stearate.Stearate is used as the part of coagulation system sometimes.In the stearate system, meeting of EDTA ion and very small amount of stearate react and cause condensing.
Under certain EDTA/ detergent concentration gradient, can adopt the cleaning of lower temperature.If all contain the EDTA/ detergent mixture in two rinse baths, the concentration in first rinse bath can be higher, and the total concentration in second rinse bath following is lower.This arrangement can be removed residue from mould more easily.Similarly, EDTA/KOH also can be with certain concentration gradient work, and wherein the concentration in first rinse bath can be higher, and the EDTA/KOH detergent concentration of following in second rinse bath is lower.
The cleaning agent optimum working temperature is 30 ℃ to 80 ℃, is preferably 40 ℃ to 60 ℃.Though cleaning system does not need heating, finds that the temperature in the slight rising system has better cleaning performance.The time that stops in each groove is generally 3 to 60 seconds, is preferably 5 to 20 seconds.
Cleaning system of the present invention is smooth all effective with textured mould to cleaning, and does not need to scrub or other scouring.Scrub and to be used for enlarging cleaning process, but do not need.
The method of cleaning mould or mould with system of the present invention may further comprise the steps:
A) mould or mould immersion are contained in the groove of 0.1wt% to 30wt%EDTA ion.Selectively contain washing agent and/or alkali in this groove.
B) selectively, but preferred, mould or mould are then immersed in one or more tanks.
C) selectively, but preferred, mould or mould are then immersed second contain EDTA, washing agent, alkali, perhaps in the rinse bath of their mixture.
D) selectively, but preferred, before beginning to be used to prepare the latex product production cycle again, mould is then immersed in last tank.
The specific embodiment
The following examples will further specify and explain the present invention, but not limit the present invention.
Embodiment 1: the mould of porcelain system is immersed in 20% calcium nitrate solution, and calcium nitrate is as the latex coagulating agent.In 120 ℃ baker, placed 1 minute, will immerse the natural rubber latex Ruzhong 1 minute with the mould of coagulating agent.The latex deposit became beading in 2 minutes 110 ℃ of dryings.Catenate deposit was immersed in water-alkali preparation 20 seconds.After the immersion, mould is put into baker, 120 ℃ solidified 20 minutes down.The deposit that cooling curing is good is peeled off it then from mould.Then this mould that has stain with following cleaning solution cleaning:
Groove #1:EDTA (4%) and washing agent (2%), 50 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:EDTA (4%) and washing agent (2%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
Die surface does not have residual film.
Embodiment 2: after gloves are peeled off from mould, and then this mould that has stain with following cleaning solution cleaning:
Groove #1:EDTA (4%) and washing agent (2%), 30 ℃ 10 seconds
Groove #2: water, 30 ℃ 10 seconds
Groove #3:EDTA (2%) and washing agent (1%), 30 ℃ 10 seconds
Groove #4: water, 30 ℃ 10 seconds
There is not residual film on the ceramic die.
Embodiment 3: after gloves are peeled off from mould, and then this mould that has stain with following cleaning solution cleaning:
Groove #1:EDTA (2%) and KOH (1%), 50 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:EDTA (0.5%) and KOH (0.5%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
There is not residual film on the ceramic die.
Embodiment 4: after gloves are peeled off from mould, and then this mould that has stain with following cleaning solution cleaning:
Groove #1:EDTA (2%), 50 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:KOH (0.8%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
Residual extremely thin film on the ceramic die.
Embodiment 5 (contrast): after gloves are peeled off from mould, then this mould that has stain with following cleaning solution cleaning:
Groove #1: nitric acid (2%), 60 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:KOH (0.8%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
More residual films on the ceramic die.
Embodiment 6 (contrast): after gloves are peeled off from mould, then this mould that has stain with following cleaning solution cleaning:
Groove #1: nitric acid (2%), 30 ℃ 10 seconds
Groove #2: water, 30 ℃ 10 seconds
Groove #3:KOH (0.8%), 30 ℃ 10 seconds
Groove #4: water, 30 ℃ 10 seconds
Residual more film on the ceramic die.
Embodiment 7 (contrast): after gloves are peeled off from mould, then this mould that has stain with following cleaning solution cleaning:
Groove #1: citric acid (2%), 60 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:KOH (0.8%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
Residual more film on the ceramic die.
Embodiment 8: after gloves are peeled off from mould, and then this mould that has stain with following cleaning solution cleaning:
Groove #1:ALCO AL-175 is a kind of 50% Sodium Polyacrylate salting liquid, buys (2%) and washing agent (1%) from ALCO chemical company, 60 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:KOH (0.8%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
Residual considerably less film on the ceramic die.
Embodiment 9: after gloves are peeled off from mould, and then this mould that has stain with following cleaning solution cleaning:
Groove #1:ALCO AR-545,50% co-polypropylene acid maleic acid sodium salt solution is buied (4%) from ALCO chemical company, 60 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3: washing agent (2%), 50 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
Residual considerably less film on the ceramic die.
Embodiment 10 (contrast): after gloves are peeled off from mould, then this mould that has stain with following cleaning solution cleaning:
Groove #1: acetone (2%), 30 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3: acetone (2%), 30 ℃ 10 seconds
Groove #4: water, 50 ℃ 10 seconds
Residual more film on the ceramic die.
Embodiment 11 (contrast): after gloves are peeled off from mould, then this mould that has stain with following cleaning solution cleaning:
Groove #1: limonene-D (2%), 30 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3: limonene-D (2%), 30 ℃ 10 seconds
Groove #4: water, 30 ℃ 10 seconds
Residual more film on the ceramic die.
Embodiment 12 (contrast): after gloves are peeled off from mould, then this mould that has stain with following cleaning solution cleaning:
Groove #1: limonene-D (2%), 30 ℃ 10 seconds
Groove #2: water, 50 ℃ 10 seconds
Groove #3:Benzoflex (1%), 30 ℃ 10 seconds
Groove #4: water, 30 ℃ 10 seconds
Residual more film on the ceramic die.
Claims (14)
1. remove the cleaning system of coagulating agent residue from mould for one kind, comprising:
A) first groove (a) contains the EDTA aqueous solution, and the amount of wherein said EDTA is 0.1wt% to 30wt%; With
B) second groove (c) contains the aqueous solution of one or more cleaning agents of 0.5wt% to 15wt%, and described cleaning agent is selected from EDTA, washing agent, and alkali.
2. according to the cleaning system of claim 1, wherein said first groove further contains at least a washing agent of 0.25wt% to 7.5wt%, at least a alkali of 0.01wt% to 10wt%, perhaps their mixture.
3. according to the cleaning system of claim 1, wherein (a) and (c) described in alkali comprise NaOH, potassium hydroxide, ammonium hydroxide, perhaps their mixture.
4. according to the cleaning system of claim 2, wherein (a) and (c) alkali described in the groove comprise NaOH, potassium hydroxide, perhaps their mixture.
5. according to the cleaning system of claim 1, wherein (a) and (c) described in EDTA with EDTA ammonium salt, EDTA sodium salt, perhaps the aqueous solution of their mixture exists.
6. according to the cleaning system of claim 1, further comprise the 3rd groove (b), this groove contains water in described the 3rd groove between first groove and second groove.
7. according to the cleaning system of claim 1, further comprise the 4th groove (d), this groove is positioned at second groove (c) afterwards, contains water in described the 4th groove.
8. according to the cleaning system of claim 1, wherein said first groove contains the EDTA of 0.5wt% to 15wt%.
9. according to the cleaning system of claim 1, wherein said first groove contains the EDTA of 1wt% to 10wt%.
10. according to the cleaning system of claim 1, wherein the temperature of each groove is 30 ℃ to 80 ℃.
11. a cleaning is used for the method for the mould or the mould of latex product moulding, wherein said method comprises:
A) described mould or mould immersion are contained in the rinse bath of EDTA;
B) selectively described mould or mould are immersed at least one tank;
C) selectively described mould or mould are immersed in second rinse bath of the aqueous solution of one or more cleaning agents that contain 0.5wt% to 15wt%, described cleaning agent is selected from EDTA, washing agent, and alkali; With
D) selectively described mould or mould are immersed in last tank.
12. according to the method for claim 11, wherein the temperature of each rinse bath and tank is 30 ℃ to 80 ℃.
13. according to the method for claim 12, the time that continues in wherein each described rinse bath of immersion and the tank is 3 to 60 seconds.
14. according to the method for claim 13, the time that continues in wherein each described rinse bath of immersion and the tank is 5 to 20 seconds.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US43589702P | 2002-12-20 | 2002-12-20 | |
| US60/435897 | 2002-12-20 | ||
| US10/690,364 US20050081892A1 (en) | 2003-10-21 | 2003-10-21 | Cleaning composition containing EDTA for cleaning formers |
| US10/690364 | 2003-10-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1513656A true CN1513656A (en) | 2004-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101248858A Pending CN1513656A (en) | 2002-12-20 | 2003-12-19 | Cleaning composition containing EDTA used for cleaning die |
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| CN (1) | CN1513656A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106393513A (en) * | 2016-08-31 | 2017-02-15 | 昆山迪乐宝精密科技有限公司 | Cleaning method of mold |
| CN106393403A (en) * | 2016-11-07 | 2017-02-15 | 九牧厨卫股份有限公司 | Maintenance method for high-pressure casting mold |
| CN107796913A (en) * | 2016-08-29 | 2018-03-13 | 镇江佳鑫精工设备有限公司 | A kind of test method for configuring die cleaning agent |
| CN108998265A (en) * | 2018-07-12 | 2018-12-14 | 深圳市龙威清洁剂有限公司 | A kind of rubber and plastic, electroplating mold detergent and preparation method thereof |
-
2003
- 2003-12-19 CN CNA2003101248858A patent/CN1513656A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796913A (en) * | 2016-08-29 | 2018-03-13 | 镇江佳鑫精工设备有限公司 | A kind of test method for configuring die cleaning agent |
| CN106393513A (en) * | 2016-08-31 | 2017-02-15 | 昆山迪乐宝精密科技有限公司 | Cleaning method of mold |
| CN106393403A (en) * | 2016-11-07 | 2017-02-15 | 九牧厨卫股份有限公司 | Maintenance method for high-pressure casting mold |
| CN106393403B (en) * | 2016-11-07 | 2019-02-26 | 九牧厨卫股份有限公司 | A kind of high pressure casting mold maintenance method |
| CN108998265A (en) * | 2018-07-12 | 2018-12-14 | 深圳市龙威清洁剂有限公司 | A kind of rubber and plastic, electroplating mold detergent and preparation method thereof |
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