CN102975321B - Method for preparing condom by using polyisoprene rubber latex - Google Patents
Method for preparing condom by using polyisoprene rubber latex Download PDFInfo
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- CN102975321B CN102975321B CN201210384529.9A CN201210384529A CN102975321B CN 102975321 B CN102975321 B CN 102975321B CN 201210384529 A CN201210384529 A CN 201210384529A CN 102975321 B CN102975321 B CN 102975321B
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Abstract
The invention discloses a method for preparing condom by using a polyisoprene rubber latex. The method comprises the steps of mixing the polyisoprene rubber latex and a proper amount of mixed component at the temperature of 20-26 DEG C to obtain a mixed latex, controlling a total solid content within 48-52% and a pH value of 10.3-10.8 during the mixing process, and standing the latex for ripening; immersing a condom mould with a proper shape in the mixed latex ripened in the step S1, and taking out the immersed condom mould and drying at the temperature of 80-90 DEG C, so as to form an adhesive film on the immersed condom mould; performing treatment of regular rolled hem, drying, swelling, removing the mould, foaming and powdering and dehydrating on the adhesive film formed on the immersed condom mould, and drying and vulcanizing the adhesive film at the temperature of 105-115 DEG C to form the condom. The obtained condom can reach required tensile strength and elongation with no need of mixing the polyisoprene rubber latex at a low temperature and immersing the condom mould.
Description
Technical field
The present invention relates to a kind of preparation method of sheath, particularly relate to a kind of method adopting polyisoprene latex to prepare sheath.
Background technology
The sheath overwhelming majority of selling on the market is at present all made with natural emulsion, and its main component is cis-Isosorbide-5-Nitrae-polyisoprene.But the sheath prepared by natural emulsion can cause a lot of health problem.Allergic reaction is had containing materials such as protein to human body in natural emulsion.So the substitute products of searching natural emulsion are with extremely urgent, various synthetic material has been used as the substitute of natural emulsion.Such as, polyurethane has also been used as the substitute of natural emulsion, has been used to the production of sheath, but the hot strength of polyurethane is very high, does not have the resilience of natural emulsion and low tensile set value.Although improve to some extent in development in recent years, also do not reach the resilience of natural emulsion and low tensile set value.
Prepare in the process of sheath in use cis-Isosorbide-5-Nitrae-polyisoprene (main component of natural emulsion), it is found that many problems, particularly sheath, hot strength is not high also has the condition of presulfurization harsher.
Mentioning in various document, by improving the crosslinking degree of polyisoprene used, improving the hot strength of the product prepared with polyisoprene.
US6618861 discloses a kind of formula of polyisoprene latex, and comprise five kinds of promoter, also useful sulphur and zinc oxide are as vulcanizing agent.The hot strength 13.22MPa of the glued membrane done under this formula, elongation at break 1028%.Such hot strength is inadequate for production sheath.
US6828387 discloses a kind of method by polyisoprene latex article of manufacture.At lower than the temperature of 35 DEG C, carry out presulfurization 90-150 minute, the latex of having worked good can store 8 days under 15-20 DEG C of condition.Carry out under the following conditions when article of manufacture: at the temperature of environment temperature or 20-25 DEG C, glove model with coagulating agent coating is immersed in compounding polyisoprene latex, 70 DEG C of heating one minute, then at 65 DEG C under drop 5 minutes, then dry 5 minutes at 70 DEG C, under 120 DEG C of conditions, finally carry out the solidification of about 20 minutes.
WO2007/113463 discloses and coordinates the method for polyisoprene latex and the condition of dipping a kind of preparation.Coordinate and carry out at low temperatures, such as 24-48 hour, preferably carries out at lower than the temperature of 20 DEG C, more preferably carries out under about 17 DEG C or lower temperature, also preferred about 15 DEG C ± 2 DEG C.In all stages until under between curing time, latex is all maintained at the temperature of about 15 DEG C ± 2 DEG C.After cure is heated 10 minutes at 120-130 DEG C.Mention and produce sheath by this method, its initial tensile strength is 24MPa or larger.
US6618861 mentions in technique in sum, the hot strength of the sheath prepared does not reach requirement, in method disclosed in WO2007/113463, in all stages until between curing time temperature conditions harsher, in current production technology, the production cost being difficult to meet completely or satisfy condition is very high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and a kind of method adopting polyisoprene latex to prepare sheath is provided, the method can implement suitability for industrialized production easily, and the polyisoprene latex sheath feel adopting the inventive method to prepare is extremely soft, pro-skin, brings ultimate attainment comfortable sensation to user.
The object of the present invention is achieved like this:
The invention provides a kind of method adopting polyisoprene latex to prepare sheath, comprise the following steps:
S1: under 20-26 DEG C of condition, make polyisoprene latex and suitable compounding ingredients mixture, obtain mixture latex, maturation parked by mixture latex;
S2: flood in the mixture latex after the condom mould of suitable shape in step sl slaking, takes out described condom mould after dipping and dries under 80-95 DEG C of condition, to form glued membrane on described condom mould;
S3: carried out in conventional crimping, oven dry, swelling, off-type, foam washing after powder, processed by the glued membrane that condom mould described in step S2 is formed, drier sulfuration under 105-115 DEG C of condition, to form sheath.
A kind of above-mentioned method adopting polyisoprene latex to prepare sheath, wherein, in step sl, under 20-26 DEG C of condition, stirring at low speed (30-60rpm) carries out mixture in 24 hours, controls total solids content in 48-52%, pH value at 10.3-10.8 in mixture process.Control the total solids content of mixture latex well, and in mixture process, ensure that pH value is between 10.3-10.8.The even property of stream of glued membrane can be improved, prevent defect and the uneven thickness of glued membrane.
A kind of above-mentioned method adopting polyisoprene latex to prepare sheath, wherein, in step sl, maturation 3-7 days parked by mixture latex.Control storage period of mixture latex well, after suitably parking, then the hot strength being prepared into glued membrane is significantly improved
A kind of above-mentioned method adopting polyisoprene latex to prepare sheath, wherein, in step s 2, dipping process carries out under 20-26 DEG C of condition, at least carry out twice dipping, and all at 80-95 DEG C, dry 5-10 minute, until the glued membrane on described condom mould is transparent after each dipping.Dipping temperature controls glue film performance can be made to reach best at 25 DEG C.
A kind of above-mentioned method adopting polyisoprene latex to prepare sheath, wherein, in step s3, the time of described glued membrane dry sulfuration under 105-115 DEG C of condition is 35-45 minute.If the too high physical property that can reduce glued membrane of after cure temperature.
The inventive method need not carry out the mixture of polyisoprene latex and the dipping of condom mould at low temperatures, and the sheath prepared also can reach required hot strength and percentage elongation.
Understand as this area, raw polyisoprene latex with suitable compounded materials mixture, to make the mixture latex obtained fully solidify, thus must obtain glued membrane.A kind of extensive use, typical mixture latex formulations is as follows:
| Batching function | Dry state proportioning (weight portion) |
| Polyisoprene latex | 100 |
| PH adjusting agent | 0-0.1 |
| Stabilizing agent | 0-1.5 |
| Vulcanizing agent | 0.5-1.2 |
| Vulcanizing activator | 0.1-0.5 |
| Promoter | 0.1-1.6 |
| Age resistor | 0.1-1.0 |
| Water | (determined by total solids content) in right amount |
In upper table, dry state proportioning refers to the solid-state proportioning after batching oven dry (implication is identical therewith for following " the dry state proportioning " occurred).
In above-mentioned formula, stabilizing agent can comprise multiple individually oriented compound.Above-mentioned formula is exemplary providing, and the polyisoprene latex of any suitable mixture can be used in principle.
The combination of any suitable promoter or promoter can be used in formula.Preferred use environment-friendly type vulcanization accelerator, this promoter can significantly improve hot strength and the percentage elongation of glued membrane, and wherein environment-friendly type vulcanization accelerator can select the combination of zinc diisobutyldithiocarbamate and zinc dibutyl dithiocarbamate.
The inventive method can produce high-quality sheath, makes it have excellent physical property, and following table is the sheath of the inventive method production and the Performance comparision of natural emulsion sheath:
As can be seen from the above table, the polyisoprene latex sheath adopting the inventive method to prepare has good performance in burst pressure, explosion volume, in addition ageing-resistant performance compared with natural emulsion sheath, this polyisoprene latex sheath feel extremely softness, pro-skin, brings ultimate attainment comfortable sensation to user simultaneously.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
Typical formula is as follows:
Embodiment 2
As follows according to the specific embodiment of the formula of embodiment 1:
In upper table, the percentage number in " batching " hurdle is the concentration of this furnish component aqueous solution, the mass percent of solute contained by namely in unit mass solution.
Embodiment 3
Adopt polyisoprene latex to prepare a method for sheath, comprise the following steps:
S1: make the batching mixture in polyisoprene latex and embodiment 1, stirring at low speed (30-60rpm) 24 hours under 20-26 DEG C of condition, and total solids content is controlled 49% in mixture process, pH value is 10.5, obtain mixture latex, mixture latex parks maturation 5 days;
S2: under 20-26 DEG C of condition, first time dipping will be carried out in the mixture latex of the condom mould of suitable shape after parking maturation, after completing, condom mould is taken out and dry 5-10 minute under 80-95 DEG C of condition, until the glued membrane on condom mould is transparent, then under 20-26 DEG C of condition, carry out second time dipping again, under 80-95 DEG C of condition, 5-10 minute is dried, until the glued membrane on condom mould is transparent after completing;
S3: the glued membrane on condom mould is carried out in conventional crimping, oven dry, swelling, off-type, foam washing after powder, processed, then at the temperature of 105-115 DEG C dry sulfuration 35-45 minute, to form sheath.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, various conversion or modification can also be made, therefore all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (6)
1. adopt polyisoprene latex to prepare a method for sheath, comprise the following steps:
S1: under 20-26 DEG C of condition, makes polyisoprene latex and suitable compounding ingredients mixture, and in mixture process, control total solids content in 48-52%, pH value at 10.3-10.8, obtain mixture latex, maturation parked by mixture latex;
S2: flood in the mixture latex after the condom mould of suitable shape in step sl slaking, takes out described condom mould after dipping and dries under 80-95 DEG C of condition, to form glued membrane on described condom mould;
S3: the glued membrane that condom mould described in step S2 is formed is carried out in conventional crimping, oven dry, swelling, off-type, foam washing after powder, processed, drier sulfuration under 105-115 DEG C of condition, to form sheath,
In step sl, under 20-26 DEG C of condition, stirring at low speed carries out mixture in 24 hours,
The rotating speed of described stirring at low speed is 30-60rpm,
Promoter in compounding ingredients described in step S1 uses environment-friendly type vulcanization accelerator,
Described environment-friendly type vulcanization accelerator is the combination of zinc diisobutyldithiocarbamate and zinc dibutyl dithiocarbamate.
2. a kind of method adopting polyisoprene latex to prepare sheath as claimed in claim 1, it is characterized in that, in step sl, maturation 3-7 days parked by mixture latex.
3. a kind of method adopting polyisoprene latex to prepare sheath as claimed in claim 1, it is characterized in that, in step s 2, dipping process carries out under 20-26 DEG C of condition.
4. a kind of method adopting polyisoprene latex to prepare sheath as described in claim 1 or 3, is characterized in that, in step s 2, at least carry out twice dipping.
5. a kind of method adopting polyisoprene latex to prepare sheath as claimed in claim 4, is characterized in that, in step s 2, all at 80-95 DEG C, dries 5-10 minute, until the glued membrane on described condom mould is transparent after each dipping.
6. a kind of method adopting polyisoprene latex to prepare sheath as claimed in claim 1, is characterized in that, in step s3, the time of the dry sulfuration of described glued membrane is 35-45 minute.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210384529.9A CN102975321B (en) | 2012-10-11 | 2012-10-11 | Method for preparing condom by using polyisoprene rubber latex |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210384529.9A CN102975321B (en) | 2012-10-11 | 2012-10-11 | Method for preparing condom by using polyisoprene rubber latex |
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| CN102975321A CN102975321A (en) | 2013-03-20 |
| CN102975321B true CN102975321B (en) | 2015-03-25 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015004674A1 (en) * | 2013-07-10 | 2015-01-15 | Ttk Protective Devices Limited | A binary process for manufacture of dipped latex products |
| CN103610531A (en) * | 2013-12-06 | 2014-03-05 | 陈汝霖 | Condom with open end capable of being tightened and adjusted and manufacturing process thereof |
| CN104840295B (en) * | 2015-05-22 | 2017-08-25 | 上海强睿博化工有限公司 | A kind of polyurethane condom and preparation method thereof |
| CN105997332A (en) * | 2016-08-05 | 2016-10-12 | 桂林恒保健康用品有限公司 | Condom and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101238172A (en) * | 2005-08-05 | 2008-08-06 | 克莱顿聚合物研究有限公司 | Latex accelerator composition |
| CN102164516A (en) * | 2008-05-01 | 2011-08-24 | 安塞尔保健产品有限责任公司 | Dip-formed synthetic polyisoprene latex articles with improved intraparticle and interparticle crosslinks |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101238172A (en) * | 2005-08-05 | 2008-08-06 | 克莱顿聚合物研究有限公司 | Latex accelerator composition |
| CN102164516A (en) * | 2008-05-01 | 2011-08-24 | 安塞尔保健产品有限责任公司 | Dip-formed synthetic polyisoprene latex articles with improved intraparticle and interparticle crosslinks |
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| CN102975321A (en) | 2013-03-20 |
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Address after: 201700 building 6, 1218 Xinda Road, Qingpu District, Shanghai Patentee after: Shanghai Celebrity sanitary products Co.,Ltd. Address before: 201700 building 6, 1218 Xinda Road, Qingpu District, Shanghai Patentee before: SHANGHAI MINGBANG RUBBER PRODUCTS Co.,Ltd. |