CN1218822C - Polyurethane condom producing process - Google Patents
Polyurethane condom producing process Download PDFInfo
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- CN1218822C CN1218822C CN 02133946 CN02133946A CN1218822C CN 1218822 C CN1218822 C CN 1218822C CN 02133946 CN02133946 CN 02133946 CN 02133946 A CN02133946 A CN 02133946A CN 1218822 C CN1218822 C CN 1218822C
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Abstract
The present invention discloses a method for producing a polyurethane condom, which comprises: after polyurethane granular materials are put in an organic solvent to be fully dissolved and filtered, the polyurethane granular materials are put in a condom mould specially treated to go through the process steps of impregnation, formation, desiccation, rolling, dusting, demoulding, etc.; as a result, the polyurethane condom with good performance is formed. The technology of the method of the present invention is integral and mature. The present invention greatly reduces the difficulty of rolling and demoulding. Moreover, the present invention can realize serial production with high efficiency.
Description
One, technical field
The invention belongs to the manufacturing technology field of polyurethane condom, be specifically related to a kind of method of making various polyurethane condoms with dip forming continuously.
Two, background technology
Make condom with polyurethane material, prior art discloses several different methods, as USP4, and 576,156 disclosed vacuum forming methods, USP5,601,092 disclosed support transfer moulding methods, USP5,833,915, USP5,469,863 disclosed thermoplastic sealing forming method and USP5,571,567, USP6,217,815, USP6,231,326 and the disclosed impregnation forming method of CN1304944A.For impregnation forming method, USP5,571,567 what describe is a kind of prescription and technology of producing polyurethane gloves and condom, has wherein adopted various auxiliary agents to improve the performance of dipped article, but DeGrain, and adjuvant used boiling point is too high, be difficult to it is removed fully, this not only can give the use of product bring shadow to, also can bring very big trouble to manufacturing process.And USP6,217,815 and USP6,231,326 what introduce respectively is a kind of dipping manufacture method and equipment of polyurethane condom, because the problem of the unresolved polyurethane impregnated film of this method demoulding difficulty, its technology and equipment are backward sheet frame batch production method, so production efficiency is low, equipment cost is also higher.CN1304944A then is when mainly introducing polyether/polyester type polyurethane material, the subsidiary impregnation forming method for preparing condom with this material of having introduced.This method is because of belonging to the preparation method of laboratory stage, and except that a no complete cover can be used for the technology of large-scale continuous production, its preparation also is a kind of step, and efficient is lower.
Three, summary of the invention
The objective of the invention is the problem that exists at existing impregnation forming method, a kind of production efficiency height is provided, and can be used for the process of producing various polyurethane condoms continuously.
Preparation technology's method of polyurethane condom provided by the invention is that the technological process in prior art is on the basis of maceration extract preparation → dip forming → drying → demoulding, use and preserve requirement according to final products, before the demoulding, increased crimping, gone up the powder operation, and the process conditions of each operation are as follows by quantity-produced requirement control:
(1) by 6～10%, the proportioning of preferred 6～8% (percentage by weights) joins in the organic solvent, stirs and be warming up to 30～50 ℃, dissolves 2～5 hours, filters standby then with the polyurethane pellet in the maceration extract preparation.Preferred 35～40 ℃ of solution temperature, preferred 3～4 hours of dissolution time.
(2) dip forming with condom mold with 2～40 mm/second, the decrease speed of preferred 5～20 mm/second immerses in the polyurethane impregnated liquid for preparing, and stops preferred 2～5 seconds 1～10 second, and then with 1～10 mm/second, the speed of preferred 1～4 mm/second proposes maceration extract.When mould leaves 1～40 millimeter of liquid level, begin rotation and upset behind preferred～millimeter, 15～60 rev/mins of rotational velocities, preferred 30～45 rev/mins, flip angle 80～120 degree, preferred 90～100 degree.When being turned to predetermined angular, mould keeps rotation to stop 1～10 minute down, and preferred 1～5 minute, and then turn to 180 degree.
(3) dry with dip forming the condom on the mould below used organic solvent boiling point 50 ℃ to 20 ℃ of scope inner dryings more than the boiling point 11～40 minutes, preferred dry 12～35 minutes.
Repeat above-mentioned dip forming, drying process 1～4 time again, preferred 2～3 times, enter following operation then in order.
(4) crimping is 30～150 rev/mins with condom at mould rotation rotating speed, and the crimping rubber roll that is close to rotation under preferred 50～100 rev/mins carries out crimping, 50～1000 rev/mins of crimping rubber roll rotating speeds, preferred 200～600 rev/mins; Inclination angle 1～20 degree, preferred 1～10 degree; 2～6 millimeters of flange lengths, preferred 3～5 millimeters.
(5) go up powder the condom of crimping to continue at mould rotation rotating speed be 30～150 rev/mins, the toner charging roller that is close to rotation under preferred 50～100 rev/mins is gone up powder, 1～60 rev/min of toner charging roller rotating speed, preferred 10～40 rev/mins.
(6) to send into two parallel and linear velocities be 50～200 mm/second to the demoulding mould that will go up the powder condom earlier, preferred 80～100 mm/second, angle of inclination beta is 5～45 degree, between the demoulding rubber roll of preferred 10～30 degree, the ring of condom is batched downwards under the effect of two demoulding rubber rolls to the junction of condom sperm-storing bag, and then it is continued to be fed into two parallel and linear velocities is 10～100 mm/second, preferred 20～60 mm/second, inclination angle 0 is 5～30 degree, between the demoulding hairbrush of preferred 10～20 degree, make it the complete demoulding, obtain the polyurethane condom goods.
In technique scheme, the polyurethane pellet can be in PAUR, EU or the polyester and polyether mixed type polyurethane any, and its hardness is Shao A50～Shao A80, preferred Shao A55～Shao A75, most preferably Shao A60～Shao A70; Its hard segment content (weight content) is 10～40%, and is preferred 15～35%, most preferably 15～30%.Consider that the used polyurethane of the present invention is the preparation condom, but thereby used polyurethane also should be nontoxic, but the biocompatibility of nothing exudate or exudate well can not cause the injury to human body.
The vulcabond of the polyurethane that suitable production the present invention selects for use can be a toluene di-isocyanate(TDI), 4,4 '-methyl diphenylene diisocyanate, isoflurane chalcone diisocyanate, 4,4 '-dicyclohexyl methyl hydride diisocyanate, 1, any in 4 '-cyclohexyl diisocyanate.Most preferably be 4,4 '-methyl diphenylene diisocyanate or 4,4 '-dicyclohexyl methyl hydride diisocyanate.
The polymer polyatomic alcohol that is fit to the polyurethane that production the present invention selects for use is that molecular weight is 800～3000, at least a in preferred 1000～2000 PTMG dihydroxylic alcohols, poly adipate succinic acid ester dihydroxylic alcohols, polycaprolactone dihydroxylic alcohols, the PCDL.Most preferred is PTMG dihydroxylic alcohols and polycaprolactone dihydroxylic alcohols.
The chain extender of the polyurethane that suitable production the present invention selects for use can be low-molecular-weight dihydroxylic alcohols, as 1, and 4-butanediol, ethylene glycol, propane diols, 1,5-pentanediol, 1, the 6-hexylene glycol can be low-molecular-weight diamine also, as ethylenediamine, preferred 1,4-butanediol, 1,5-pentanediol.
The used polyurethane of the present invention can adopt the still reaction method, also can adopt the continuous extrusion molding preparation of twin-screw.
The synthesis technique of typical still reaction method is: the polymer polyatomic alcohol and the vulcabond of suitable proportioning are fully mixed in still, reacted 10～80 minutes down in 40～100 ℃; Add chain extender more according to a certain ratio, under 50～110 ℃, mix and reacted 3～30 minutes; After the discharging, post curing is 2～12 hours in 90～140 ℃ of baking ovens; Broken then, and, make its performance stable homogeneous with single screw rod or double screw extruder granulation.
The synthesis technique of the typical continuous extrusion molding of twin-screw is: polymer polyatomic alcohol, vulcabond and the chain extender accurate measurement of suitable proportioning are fully mixed in the back adding response type double screw extruder, in maximum temperature is to react under 200～280 ℃ to extrude, the mean residence time of material in extruder is 5～15 minutes, extrude the back and adopt the pelletizing of underwater cutpellet system, the dry pellet that gets.
In the technical scheme that the invention described above provides, organic solvent is at least a in dimethyl formamide, dimethylacetylamide, dimethyl sulfoxide (DMSO) and the oxolane.
In order to prevent that polyurethane condom from producing the defective of bubble and so on too soon because of solvent evaporates in dry run, influence product quality, drying process of the present invention is divided into three sections to carry out, and first section baking temperature is following 10～50 ℃ of solvent boiling point, 2～15 minutes time, preferred 3～10 minutes; Second section baking temperature is following 5～20 ℃ of solvent boiling point, 4～15 minutes time, preferred 8～10 minutes; The 3rd section baking temperature is in above 20 ℃ of the solvent boiling point, 5～10 minutes time, preferred 5～8 minutes.
For the adhesion that reduces between polyurethane condom film and the mould is convenient to the demoulding, and don't influence polyurethane impregnated liquid to the enough infiltrations of die surface, the present invention carries out Passivation Treatment to die surface before dip forming, passivation treating agent is that dichlorodimethylsilane is or/and trichloromethyl silane.
In sum, the present invention has the following advantages:
1, because the present invention has adopted the technical measures of die surface being carried out Passivation Treatment before dip forming, reduced the adhesion of polyurethane film to die surface, solved the problem of prior art demoulding difficulty, made the dip forming method produce polyurethane condom continuously and become reality.
2, the manufacture method of polyurethane condom provided by the invention, complete process, maturation, can serialization production, the cycle is short, production efficiency is high.
3, because drying process can adopt the syllogic temperature mode that raises gradually, can avoid the volatilization of polyurethane condom product Yin Wendu high solvent too fast and produce the defective of bubble and so on, guarantee product quality.
4, because the used polyurethane of manufacture method of polyurethane condom provided by the invention can be PAUR or EU, also can be polyester and polyether mixed type polyurethane, so applied widely.
Four, description of drawings
Fig. 1 is a kind of process flow diagram of the present invention;
Fig. 2 looks schematic diagram for the crimping principle master of crimping operation of the present invention;
Fig. 3 looks schematic diagram for the crimping principle left side of crimping operation of the present invention;
Fig. 4 looks schematic diagram for the demoulding principle master of stripping process of the present invention;
Fig. 5 looks schematic diagram for the demoulding principle left side of stripping process of the present invention;
Fig. 6 looks schematic diagram for the demoulding principle master of stripping process of the present invention;
Fig. 7 looks schematic diagram for the demoulding principle left side of stripping process of the present invention;
Five, the specific embodiment
Provide embodiment so that the present invention is carried out concrete description below in conjunction with accompanying drawing; it is worthy of note that following examples only are used for that the invention will be further described; and can not be interpreted as limiting the scope of the invention, some nonessential improvement that the person skilled in the art in this field makes the present invention according to the invention described above content and adjust the row that still belong to the present invention's protection.
Embodiment 1～3
The technological process of the embodiment of the invention as shown in Figure 1, operations such as it comprises, and mould Passivation Treatment, mould are cleaned, the dry cooling of mould, maceration extract preparation, dip forming, drying, crimping, last powder, the demoulding.It should be noted that: one, the mould Passivation Treatment is to use pre-treatment first at mould.Two, because embodiments of the invention all adopt dip forming and drying respectively three times, so the dip forming unit has three; Drying is then because of mould shared drying unit behind dip forming Unit 1,2, so drying unit has two.Three, the solvent that is evaporated of drying unit can reclaim by the solvent recovery operation.Each process flow is undertaken by direction shown in the arrow among the figure.
Wherein the principle of crimping operation is seen Fig. 2,3, and 1 is mould among the figure, and 2 is polyurethane condom, and 3 is the crimping roller.Rotation is rotation in a direction indicated by the arrow.The principle of stripping process is seen Fig. 4～7, and 1 is mould among the figure, and 2 is polyurethane condom, 4 rings for the formation of polyurethane condom crimping, and 5 are demoulding rubber roll; 6 are band powder hairbrush, 20 millimeters of the staple lengths of hairbrush, and rotation is rotation in a direction indicated by the arrow.
According to the technological process that Fig. 1 provides, implementation process of the present invention is: take by weighing a certain amount of polyurethane pellet earlier by subordinate list and join in the appropriate amount of organic, stir and be warming up to dissolving fully, use 200 purpose nylon net filters standby then; With the glass mold that uses first earlier with the acetone solvent surface treatment of the dichlorodimethylsilane of 2.5% concentration, after cleaning up also dry cooling then, the process conditions dip forming of giving by foregoing mode and subordinate list, dry each three times, carry out crimping then successively, go up powder, the demoulding can obtain the product with following performance:
Hot strength 41MPa; Elongation at break 520%; Airblasting pressure 6～8KPa; Airblasting capacity 5～7l; 0.08 millimeter of thickness; Quality 1.1～1.4 gram, and soft, transparent, thermal conductivity, susceptibility and biocompatibility are all good, do not have the polyurethane condom of sensitization.
| The process conditions of each operation | Embodiment 1 | |
Embodiment 3 | ||
| The maceration extract preparation | Polyurethane pellet kind | PAUR hardness Shao A65, hard segment content 28% | EU hardness Shao A60, hard segment content 24% | Polyester and polyether mixed type polyurethane hardness Shao A65, hard segment content 25% | |
| The organic solvent kind | Oxolane | Dimethyl formamide | Oxolane | ||
| Solution temperature (℃) | 40 | 60 | 40 | ||
| Dissolution time (hour) | 2.5 | 3 | 3 | ||
| Concentration (wt%) | 7.5 | 8.5 | 8 | ||
| Dip forming | Decrease speed (mm/s) | 10 | 15 | 20 | |
| The time of staying (s) | 3 | 2 | 4 | ||
| Hoisting velocity (mm/s) | 4 | 2 | 3 | ||
| From liquid height (mm) | 30 | 15 | 20 | ||
| Rotational velocity (rev/min) | 60 | 40 | 30 | ||
| Flip angle (degree) | 95 | 100 | 110 | ||
| The rotation and the time of staying (branch) | 5 | 3 | 4 | ||
| Dry | First section | Temperature (℃) | 40 | 120 | 45 |
| Time (branch) | 6 | 6 | 5 | ||
| Second section | Temperature (℃) | 50 | 145 | 55 | |
| Time (branch) | 8 | 10 | 6 | ||
| The 3rd section | Temperature (℃) | 80 | 155 | 90 | |
| Time (branch) | 2 | 4 | 2 | ||
| Crimping | The mould rotating speed (rev/min) | 50 | 60 | 40 | |
| The rubber roll rotating speed (rev/min) | 500 | 700 | 450 | ||
| Rubber roll inclination angle (degree) | 3 | 5 | 2 | ||
| Last powder | The mould rotating speed (rev/min) | 60 | 50 | 40 | |
| Powder roller rotating speed (rev/min) | 60 | 50 | 40 | ||
| The demoulding | Rubber roll linear velocity (mm/second) | 80 | 90 | 60 | |
| Rubber roll inclination angle (degree) | 20 | 25 | 18 | ||
| Hairbrush linear velocity (mm/second) | 50 | 60 | 40 | ||
| Hairbrush inclination angle (degree) | 15 | 20 | 12 | ||
Claims (13)
1, a kind of manufacture method of polyurethane condom, its technological process is maceration extract preparation → dip forming → drying → demoulding, it is characterized in that before the demoulding, also must carry out crimping, go up powder, and the control of the process conditions of each operation is as follows:
(1) maceration extract preparation with the polyurethane pellet by weight percentage 6～10% proportioning join in the organic solvent, stir and be warming up to 30～50 ℃, dissolved 2～5 hours, filter standby then;
(2) dip forming immerses the decrease speed of condom mold with 2～40 mm/second in the polyurethane impregnated liquid for preparing, stopped 1～10 second, and then maceration extract is proposed with the speed of 1～10 mm/second, after leaving 140 millimeters of liquid levels, mould begins rotation and upset, 15～60 rev/mins of rotational velocities, flip angle 80～120 degree are when being turned to predetermined angular, mould keeps rotation to stop 1～10 minute down, and then turn to 180 degree;
(3) dry with dip forming the condom on the mould below used organic solvent boiling point 50 ℃ to 20 ℃ of inner dryings more than the boiling point 11～40 minutes;
Repeat above-mentioned dip forming, drying process 1～4 time again;
(4) crimping is that the crimping rubber roll that is close to rotation under 30～150 rev/mins carries out crimping with condom at mould rotation rotating speed, 50～1000 rev/mins of crimping rubber roll rotating speeds, inclination alpha 1～20 degree, 2～6 millimeters of flange lengths;
(5) go up powder the condom of crimping to continue at mould rotation rotating speed be powder on the toner charging roller that is close to rotation under 30～150 rev/mins carries out, 1～60 rev/min of toner charging roller rotating speed;
(6) to send into two parallel and linear velocities be 50～200 mm/second to the demoulding mould that will go up the powder condom, angle of inclination beta is between the demoulding rubber roll of 5～45 degree, the ring of condom is batched downwards under the effect of two demoulding rubber rolls to the junction of condom sperm-storing bag, and then it is continued to be fed into two parallel and linear velocities is 10～100 mm/second, inclination angle [theta] is between the demoulding hairbrush of 5～30 degree, makes it the complete demoulding.
2, the manufacture method of polyurethane condom according to claim 1 is characterized in that the process conditions of each operation also can be controlled as follows:
(1) maceration extract preparation with the polyurethane pellet by weight percentage 6～8% proportioning join in the organic solvent, stir and be warming up to 35～40 ℃, dissolved 34 hours, filter standby then;
(2) dip forming immerses the decrease speed of condom with 5～20 mm/second in the polyurethane impregnated liquid for preparing, stopped 2～5 seconds, and then maceration extract is proposed with the speed of 14 mm/second, after leaving 10～30 millimeters of liquid levels, mould begins rotation and upset, 30～45 rev/mins of rotational velocities, flip angle 90～100 degree are when being turned to predetermined angular, mould keeps rotation to stop 1～5 minute down, and then turn to 180 degree;
(3) dry with dip forming the condom on the mould below used organic solvent boiling point 50 ℃ to 20 ℃ of inner dryings more than the boiling point 12～35 minutes;
Repeat above-mentioned dip forming, drying process 2～3 times again;
(4) crimping is that the crimping rubber roll that is close to rotation under 50～100 rev/mins carries out crimping with condom at mould rotation rotating speed, 200～600 rev/mins of crimping rubber roll rotating speeds, inclination alpha 1～10 degree, 3～5 millimeters of flange lengths;
(5) go up powder the condom of crimping to continue at mould rotation rotating speed be that the toner charging roller that is close to rotation under 50～100 rev/mins carries out crimping, 10～40 rev/mins of toner charging roller rotating speeds;
(6) to send into two parallel and linear velocities be 80～100 mm/second to the demoulding mould that will go up the powder condom earlier, angle of inclination beta is between the demoulding rubber roll of 10～30 degree, the ring of condom is batched downwards under the effect of two demoulding rubber rolls to the junction of condom sperm-storing bag, and then it is continued to be fed into two parallel and linear velocities is 20～60 mm/second, inclination angle [theta] is between the demoulding hairbrush of 10～20 degree, makes it the complete demoulding.
3, the manufacture method of polyurethane condom according to claim 1 and 2, it is characterized in that the polyurethane pellet is any in PAUR, EU or the polyester and polyether mixed type polyurethane, its hardness is Shao A50～Shao A80, and the weight content of its hard section is 10～40%.
4, the manufacture method of polyurethane condom according to claim 1 and 2, it is characterized in that the polyurethane pellet is any in PAUR, EU or the polyester and polyether mixed type polyurethane, its hardness is Shao A55～Shao A75, and the weight content of its hard section is 15～35%.
5, the manufacture method of polyurethane condom according to claim 1 and 2, it is characterized in that the polyurethane pellet is any in PAUR, EU or the polyester and polyether mixed type polyurethane, its hardness is Shao A60～Shao A70, and the weight content of its hard section is 15～30%.
6, the manufacture method of polyurethane condom according to claim 1 and 2 is characterized in that organic solvent is at least a in dimethyl formamide, dimethylacetylamide, dimethyl sulfoxide (DMSO) and the oxolane.
7, the manufacture method of polyurethane condom according to claim 3 is characterized in that organic solvent is at least a in dimethyl formamide, dimethylacetylamide, dimethyl sulfoxide (DMSO) and the oxolane.
8, the manufacture method of polyurethane condom according to claim 1 and 2 is characterized in that drying is divided into three sections and carries out, and first section baking temperature is following 10～50 ℃ of solvent boiling point, 2～15 minutes time; Second section baking temperature is following 5～20 ℃ of solvent boiling point, 4～15 minutes time; The 3rd section baking temperature is in above 20 ℃ of the solvent boiling point, 5～10 minutes time.
9, the manufacture method of polyurethane condom according to claim 7 is characterized in that drying is divided into three sections and carries out, and first section baking temperature is following 10～50 ℃ of solvent boiling point, 2～15 minutes time; Second section baking temperature is following 5～20 ℃ of solvent boiling point, 4～15 minutes time; The 3rd section baking temperature is in above 20 ℃ of the solvent boiling point, 5～10 minutes time.
10, the manufacture method of polyurethane condom according to claim 8 is characterized in that 3～10 minutes drying times of first period.
11, the manufacture method of polyurethane condom according to claim 1 and 2 is characterized in that must carrying out Passivation Treatment to die surface before the dip forming, and passivation treating agent is that dichlorodimethylsilane is or/and trichloromethyl silane.
12, the manufacture method of polyurethane condom according to claim 7 is characterized in that must carrying out Passivation Treatment to die surface before the dip forming, and passivation treating agent is that dichlorodimethylsilane is or/and trichloromethyl silane.
13, the manufacture method of polyurethane condom according to claim 10 is characterized in that must carrying out Passivation Treatment to die surface before the dip forming, and passivation treating agent is that dichlorodimethylsilane is or/and trichloromethyl silane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133946 CN1218822C (en) | 2002-10-23 | 2002-10-23 | Polyurethane condom producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02133946 CN1218822C (en) | 2002-10-23 | 2002-10-23 | Polyurethane condom producing process |
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| CN1403263A CN1403263A (en) | 2003-03-19 |
| CN1218822C true CN1218822C (en) | 2005-09-14 |
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|---|---|---|---|
| CN 02133946 Expired - Fee Related CN1218822C (en) | 2002-10-23 | 2002-10-23 | Polyurethane condom producing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017036177A1 (en) * | 2015-09-02 | 2017-03-09 | 上海强睿博高分子科技有限公司 | Condom demolding method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108309542A (en) * | 2018-04-02 | 2018-07-24 | 沈阳工业大学自控技术有限公司 | Condom rolls up covering device and condom packaging system |
| CN111658288A (en) * | 2020-05-20 | 2020-09-15 | 兰州科天健康科技股份有限公司 | Pure polyurethane condom with adhesive layer and preparation method thereof |
| CN113043619B (en) * | 2021-02-01 | 2022-09-09 | 桂林恒保健康防护有限公司 | System for manufacturing polyurethane condom by wet method |
| CN112830201A (en) * | 2021-02-12 | 2021-05-25 | 上海名流卫生用品股份有限公司 | Device for ensuring consistency of discharge direction of condom electronic inspection machine |
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2002
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017036177A1 (en) * | 2015-09-02 | 2017-03-09 | 上海强睿博高分子科技有限公司 | Condom demolding method |
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