CN111743680A - Composite polyurethane condom and preparation method thereof - Google Patents
Composite polyurethane condom and preparation method thereof Download PDFInfo
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- CN111743680A CN111743680A CN202010430483.4A CN202010430483A CN111743680A CN 111743680 A CN111743680 A CN 111743680A CN 202010430483 A CN202010430483 A CN 202010430483A CN 111743680 A CN111743680 A CN 111743680A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F6/00—Contraceptive devices; Pessaries; Applicators therefor
- A61F6/02—Contraceptive devices; Pessaries; Applicators therefor for use by males
- A61F6/04—Condoms, sheaths or the like, e.g. combined with devices protecting against contagion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/14—Dipping a core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/22—Making multilayered or multicoloured articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/38—Moulds, cores or other substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/52—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/12—Layered products comprising a layer of natural or synthetic rubber comprising natural rubber
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
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- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The invention discloses a composite polyurethane condom and a preparation method thereof, wherein the composite polyurethane condom comprises: a first base material layer; the bonding layer is formed on the first substrate layer; and the second base material layer is formed on the bonding layer. According to the invention, a special bonding layer is added between two layers of materials, so that two materials with different polarities can be firmly attached together, and the layering phenomenon cannot occur.
Description
Technical Field
The invention belongs to the technical field of condoms, and particularly relates to a composite polyurethane condom and a preparation method thereof.
Background
The natural latex rubber condom has the thickness of less than 0.04mm due to the material characteristics of natural latex, and meanwhile, the natural latex contains a plurality of proteins, so that certain safety risk exists when people with protein allergy use the condom. With the improvement of living standard of people, the demand of consumers on condoms not only stays on the basic function of contraception, but also more uses and experiences of condoms are required. The water-based polyurethane condom is a novel product on the market in recent years, but the flexibility of the polyurethane material has a certain difference relative to natural rubber. In order to combine the characteristics of the two materials, a product with thinness and flexibility meeting the requirements of the public is made. The production is carried out by adopting a physical laminating mode, but because the natural latex and the water-based polyurethane are materials with two polarities, the adhesive force between the two materials is low during laminating, so that the product is easy to laminate and can not meet the design requirement.
Disclosure of Invention
The invention aims to provide a composite polyurethane condom and a preparation method thereof, for example, a special bonding layer is added between two layers of materials, so that two materials with different polarities can be firmly attached together, and the layering phenomenon cannot occur.
In order to solve the problems, the invention is realized by the following technical scheme: the invention provides a composite polyurethane condom, at least comprising:
a first base material layer;
the bonding layer is formed on the first substrate layer;
the second base material layer is formed on the bonding layer;
the bonding layer comprises aliphatic sulfonic acid type waterborne polyurethane, the molecular chain of the aliphatic sulfonic acid type waterborne polyurethane contains amino, sulfonic group and carboxyl group, and the 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The thickness of the adhesive layer is 0.1～20μm。
In one embodiment, the first substrate layer includes any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film.
In one embodiment, the second substrate layer includes any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film.
In one embodiment, the aliphatic sulfonic acid-based waterborne polyurethane includes a polyether/polyester polyol, an aliphatic isocyanate, a crosslinker, a small molecule chain extender, and a hydrophilic chain extender.
In one embodiment, the molecular weight of the polyether/polyester polyol is 400-6000, and the polyether/polyester polyol comprises any one or more of polypropylene oxide glycol, polytetramethylene ether glycol, neopentyl glycol adipate, 1, 4-butanediol adipate, 1, 6-hexanediol adipate, polycaprolactone and polycarbonate.
In one embodiment, the aliphatic isocyanate includes one or more combinations of aliphatic isocyanates such as Hexamethylene Diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane-4, 4' -diisocyanate (HMDI), and the like.
In one embodiment, the cross-linking agent comprises any one or combination of trimethylolpropane, silanes, neopentyl glycol and castor oil.
In one embodiment, the hydrophilic chain extender is any one or two of ethylenediamine ethanesulfonic acid sodium and dimethylolpropionic acid (DMPA).
In one embodiment, the number average molecular weight of the adhesion layer is 20000-.
In one embodiment, the composite polyurethane condom further comprises:
the second bonding layer is formed on the second base material layer;
and the third base material layer is formed on the second bonding layer.
In one embodiment, the adhesive layer has an elongation at break of 500% or more.
In one embodiment, the condom has a thickness of 0.01-0.068 mm.
In one embodiment, the number of layers of the condom is 3-6.
In one embodiment, the aliphatic sulfonic acid type aqueous polyurethane further includes silane groups and/or hydroxyl groups on the molecular chain.
The invention also aims to provide a preparation method of the composite polyurethane condom, which at least comprises the following steps:
providing a mould;
forming a first substrate layer on the mold;
forming an adhesive layer on the first substrate layer;
forming a second substrate layer on the adhesive layer;
removing the mould to obtain the composite polyurethane condom;
the bonding layer comprises aliphatic sulfonic acid type waterborne polyurethane, the molecular chain of the aliphatic sulfonic acid type waterborne polyurethane contains amino, sulfonic group and carboxyl group, and the 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The thickness of the adhesive layer is 0.1 to 20 μm.
In one embodiment, the mold is removed by using mold release water containing a release agent.
In the invention, a special bonding layer is added between two layers of materials, so that the two materials with different polarities can be firmly attached together, and the layering phenomenon can not occur. According to the invention, the film materials on the two sides of the bonding layer are bonded together, so that the film materials can exert respective material advantages. The adhesive layer has low modulus, high adhesiveness, high compatibility, high resilience and high adhesive force, and materials with different properties are combined through the boundary bridge effect, so that the safety sleeve disclosed by the invention is not layered after being soaked in hot alkaline water or hot water at the temperature of 50-70 ℃ for 1-10 minutes. In the invention, through the mutual synergistic action among amino, sulfonic acid and carboxyl groups, the polyurethane or nonpolar materials can react or form good adhesive force, so that the adhesive layer has extremely strong adhesive force with the materials on both sides of the adhesive layer, and the delamination phenomenon is further ensured not to occur.
Drawings
FIG. 1: the composite polyurethane condom in one embodiment of the invention is a schematic diagram when the composite polyurethane condom is of a 3-layer structure;
FIG. 2: the method in one embodiment of the invention is schematically illustrated in flow chart;
FIG. 3: the composite polyurethane condom in one embodiment of the invention is a schematic diagram of a 5-layer structure.
Description of the symbols
101 first substrate layer
102 adhesive layer
103 second substrate layer
104 second adhesive layer
105 third substrate layer
Detailed Description
The present invention is further illustrated by the following specific examples, but it should be noted that the specific material ratios, process conditions, results, etc. described in the examples of the present invention are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the scope of the present invention. Note that "%" shown in the description herein means "part by mass" unless otherwise specified.
In the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first" and "second," if any, are used for descriptive and distinguishing purposes only and are not to be construed as indicating or implying relative importance.
The invention provides a composite polyurethane condom and a preparation method thereof, wherein a special bonding layer is added between two layers of materials, so that two materials with different polarities can be firmly attached together, and the condom can be soaked in hot alkaline water or hot water at 50-70 ℃ for 1-10 minutes without layering.
Referring to fig. 2, a schematic flow chart of a method for manufacturing a composite polyurethane condom according to an embodiment of the present invention at least includes the following steps:
s1, providing a mould;
s2, forming a first base material layer on the die;
s3, forming an adhesive layer on the first substrate layer;
s4, forming a second base material layer on the bonding layer;
s5, removing the mould to obtain the composite polyurethane condom;
the bonding layer comprises aliphatic sulfonic acid type waterborne polyurethane, the molecular chain of the aliphatic sulfonic acid type waterborne polyurethane contains amino, sulfonic group and carboxyl group, and the 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The thickness of the adhesive layer is 0.1 to 20 μm.
Specifically, in step S1, the mold is, for example, a glass or other material condom mold.
Specifically, in step S2, for example, the mold surface is heated to 30 to 40 ℃, and then the mold is immersed in an immersion liquid containing the material of the first base material layer 101 for, for example, 35 to 60 seconds, and after the immersion is completed, the mold is taken out, dried at, for example, 90 to 110 ℃, and the immersion can be repeated. The material of the first substrate layer 101 is, for example, any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film.
Specifically, in step S3, the mold on which the first substrate layer 101 is formed is immersed in a liquid containing the material of the adhesive layer 102 for, for example, 35 to 60 seconds, and after the immersion is completed, the mold is taken out, dried at, for example, 80 to 120 ℃, and repeatedly immersed to form the adhesive layer 102. The material of the adhesive layer 102 includes, for example, aliphatic sulfonic acid type waterborne polyurethane, and specifically, the thickness of the adhesive layer 102 is, for example, 0.1 to 10 μm.
Specifically, in step S4, the mold on which the adhesive layer 102 is formed is immersed in a liquid containing the material of the second substrate layer 103 for, for example, 35 to 60 seconds, and after the immersion is completed, the mold is taken out, dried at, for example, 100 to 140 ℃, and repeatedly immersed to form the second substrate layer 103. The material of the first substrate layer 101 is, for example, any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film. The materials of the first substrate layer 101 and the second substrate layer 103 are, for example, different in polarity, and also, for example, the same in polarity. The adhesive layer 102 of the present invention combines materials with different properties by a bridge function, so that two materials with different polarities can be firmly attached to each other.
Specifically, in step S5, the polyurethane condom is swelled with, for example, hot-alkali water, demolded with water, such as adding a release agent into demolded water, to remove the mold, and then dried, for example, by a dryer, to obtain the composite polyurethane condom. The composite polyurethane condom comprises four layers, five layers, six layers and the like. The adhesive layer 102 serves as one or two layers in the middle, and other material films are respectively compounded on two sides of each adhesive layer.
Referring to fig. 1, an embodiment of the present invention further provides a composite polyurethane condom, wherein the condom has a thickness of 0.01 to 0.068 mm. The number of layers of the condom is 3-6, for example. Specifically, the method at least comprises the following steps: a first substrate layer 101, an adhesive layer 102 and a second substrate layer 103. The adhesive layer 102 is formed on the first substrate layer 101. The second base material layer 103 is formed on the adhesive layer 102. Wherein the adhesive layer 102 is, for example, a bagThe aliphatic sulfonic acid type waterborne polyurethane comprises aliphatic sulfonic acid type waterborne polyurethane, wherein a molecular chain of the aliphatic sulfonic acid type waterborne polyurethane contains unsaturated double bonds, amino groups, sulfonic acid groups and carboxyl groups, and can chemically react with the first substrate layer 101 and the second substrate layer 103 to form chemical bonds, for example. In another embodiment, the aliphatic sulfonic acid type aqueous polyurethane further includes, for example, silane groups and/or hydroxyl groups on the molecular chain. The 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The adhesive layer has a thickness of 0.1 to 20 μm, and the adhesive layer has an elongation at break of, for example, 500% or more. The first substrate layer 101 includes, for example, any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film. The second substrate layer 103 includes, for example, any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film. The polarity of the material of the first substrate layer 101 and the second substrate layer 103 is different, for example. The material of the bonding layer 102 is, for example, aliphatic polyester type waterborne polyurethane material, which is synthesized by using polyester polyol, has strong adhesive force to polar and non-polar materials, and has the characteristics of softness and high elongation, and the 100% modulus is less than or equal to 1.2N/mm2The elongation at break is 500% or more. In one embodiment, the aliphatic sulfonic acid-based waterborne polyurethane includes a polyether/polyester polyol, an aliphatic isocyanate, a cross-linker, a small molecule chain extender, and a hydrophilic chain extender. In one embodiment, the molecular weight of the polyether/polyester polyol is 400-6000, and the polyether/polyester polyol comprises any one or more of polypropylene oxide glycol, polytetramethylene ether glycol, neopentyl glycol adipate, 1, 4-butanediol adipate, 1, 6-hexanediol adipate, polycaprolactone and polycarbonate. In one embodiment, the aliphatic isocyanate includes one or more combinations of aliphatic isocyanates such as Hexamethylene Diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane-4, 4' -diisocyanate (HMDI), and the like. In one embodiment, the crosslinking agent comprises trimethylolpropane, silanes, neopentyl glycol and castor beanAny one or more of sesame oil. In one embodiment, the hydrophilic chain extender is any one or two of ethylenediamine ethanesulfonic acid sodium and dimethylolpropionic acid (DMPA). The present invention is an effective method for overcoming the drawbacks of the prior art by adding an adhesive layer between two materials when laminating natural latex and aqueous polyurethane, for example. For example, the number average molecular weight of the adhesive layer is 20000-.
Referring to fig. 3, in some embodiments, the composite polyurethane condom further includes: a second adhesive layer 104 and a third substrate layer 105. The second adhesive layer 104 is formed on the second substrate layer 103, the third substrate layer 105 is formed on the second adhesive layer 102, and polarities of the third substrate layer 105 and the second substrate layer 103 are, for example, the same or different. The third substrate layer 105 is, for example, any one of a natural latex film, a synthetic rubber film, a polyurethane film, and a polyisoprene film.
Referring to fig. 1, in some embodiments, the first substrate layer 101 is, for example, a natural latex film or a synthetic rubber film, the adhesive layer 102 is, for example, an aliphatic sulfonic acid-type waterborne polyurethane containing unsaturated double bonds, amino groups and carboxyl groups on a molecular chain, and a 100% modulus of the aliphatic sulfonic acid-type waterborne polyurethane is equal to or less than 1.2N/mm2The thickness of the bonding layer is 0.1-20 μm, and the material of the second substrate layer 103 is, for example, a polyurethane film. In other embodiments, the first substrate layer 101 is, for example, a natural latex film or a synthetic rubber film, the bonding layer 102 is, for example, aliphatic sulfonic acid type waterborne polyurethane containing unsaturated double bonds, amino groups and carboxyl groups on the molecular chain, and the 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The thickness of the bonding layer is 0.1-20 μm, and the material of the second substrate layer 103 is, for example, Polyisoprene (PI) film. In still other embodiments, the first substrate layer 101 is a polymerA Pentadiene (PI) film such as an aqueous polyurethane film, the adhesive layer 102 is, for example, an aliphatic sulfonic acid type aqueous polyurethane containing an unsaturated double bond, an amino group and a carboxyl group in a molecular chain, and the 100% modulus of the aliphatic sulfonic acid type aqueous polyurethane is 1.2N/mm or less2The thickness of the bonding layer is 0.1-20 μm, and the material of the second substrate layer 103 is, for example, Polyisoprene (PI) film.
The present invention will be described in detail with reference to the following examples.
Referring to the data in table 1, in an embodiment, for example, a glass mold or a condom mold made of other materials is cleaned, the surface of the mold is heated to 30 to 40 ℃, the mold is immersed in a latex liquid, such as a latex liquid containing natural latex and synthetic rubber, for example, for 35 to 60 seconds, and after the immersion, the mold is taken out, dried at 90 to 110 ℃, and the immersion can be repeated. A latex layer a was obtained. And then, the mold with the latex layer is immersed into the liquid containing the adhesive layer A material for 35-60 seconds, for example, and after the immersion is finished, the mold is taken out, dried at 80-120 ℃ for example, and can be repeatedly immersed to form the adhesive layer A. The material of the adhesive layer A comprises aliphatic sulfonic acid type waterborne polyurethane, specifically aliphatic polyester type waterborne polyurethane, and the thickness of the adhesive layer A is controlled to be 0.1-10 μm. And then, the die on which the bonding layer A is formed is immersed in a liquid containing the waterborne polyurethane for 35 to 60 seconds, for example, and after the immersion is finished, the die is taken out, dried at 100 to 140 ℃, for example, and repeatedly immersed to form the waterborne polyurethane layer A. And (2) carrying out curling treatment, drying at 120-140 ℃ after curling, swelling with hot alkali water, carrying out water flushing demolding, adding a separant into demolding water, and drying by using a dryer to obtain the composite polyurethane condom A, wherein one side of the embodiment is a latex material, and the other side is a waterborne polyurethane material which is two materials with different polarities.
Referring to the data in table 1, in another embodiment, the latex material is adhered to both sides of the adhesive layer B in this embodiment, and the polarity is the same. For example, a glass mold or a condom mold made of other materials is cleaned, the surface of the mold is heated to 30-40 ℃, the mold is immersed into latex liquid, for example, latex liquid containing natural latex and synthetic rubber, the immersion time is 35-60 seconds, after the immersion is finished, the mold is taken out, dried at 90-110 ℃ for example, and the immersion can be repeated. A latex layer B was obtained. And then, the mold with the latex layer is immersed into the liquid containing the bonding layer material for 35 to 60 seconds, for example, and after the immersion is finished, the mold is taken out, dried at a temperature of 80 to 100 ℃, for example, and repeatedly immersed to form the bonding layer B. The material of the adhesive layer B includes, for example, aliphatic sulfonic acid type waterborne polyurethane, specifically, aliphatic polyester type waterborne polyurethane, and the thickness of the adhesive layer B is controlled to be, for example, 0.1 to 10 μm. Then, the mold having the adhesive layer B formed thereon is immersed in a liquid containing a latex liquid B1 for 35 to 60 seconds, for example, and after the immersion is completed, the mold is taken out, dried at 90 to 110 ℃, for example, and repeatedly immersed to form a latex liquid B1. And (3) performing edge curling treatment, drying at 100-120 ℃ after edge curling, swelling with hot alkali water, performing water flushing demolding, adding a separant into demolding water, and drying by a dryer to obtain the composite polyurethane condom B.
Referring to the data in table 1, in another embodiment, the two sides of the adhesive layer C in this embodiment are adhered with the aqueous polyurethane material, which is a material with the same polarity. For example, a glass mold or a condom mold made of other materials is cleaned, the surface of the mold is heated to 30-40 ℃, the mold is immersed into liquid C1 containing waterborne polyurethane, the immersion time is 35-60 seconds, after the immersion is finished, the mold is taken out, and the mold is dried at 90-110 ℃ for example and can be immersed repeatedly, so that a waterborne polyurethane layer C1 is obtained. Then, the mold having the aqueous polyurethane layer C1 formed thereon is dipped in a liquid containing the adhesive layer C material for 35 to 60 seconds, for example, and after the dipping, the mold is taken out, dried at 80 to 100 ℃, for example, and repeatedly dipped to form the adhesive layer C. The material of the adhesive layer C includes, for example, aliphatic sulfonic acid type waterborne polyurethane, specifically, aliphatic polyester type waterborne polyurethane, and the thickness of the adhesive layer C is controlled to be, for example, 0.1 to 10 μm. Then, the mold having the adhesive layer C formed thereon is immersed in a liquid C2 containing an aqueous polyurethane for 35 to 60 seconds, for example, and after the immersion is completed, the mold is taken out, dried at 100 to 120 ℃, for example, and repeatedly immersed to form an aqueous polyurethane layer C2. And (3) performing edge curling treatment, drying at 120-140 ℃ after edge curling, swelling with hot alkali water, performing water flushing demolding, adding a separant into demolding water, and drying by a dryer to obtain the composite polyurethane condom C.
Referring to the data in table 1, in another embodiment, the adhesive layer C in this embodiment is adhered with an emulsion material on one side and Polyisoprene (PI) on the other side, which are materials with different polarities. For example, a glass mold or a condom mold made of other materials is cleaned, the surface of the mold is heated to 30-40 ℃, the mold is immersed into latex liquid, for example, latex liquid containing natural latex and synthetic rubber, the immersion time is 35-60 seconds, after the immersion is finished, the mold is taken out, dried at 90-110 ℃ for example, and the immersion can be repeated. A latex layer D was obtained. And then, dipping the mold with the latex layer into liquid containing the adhesive layer D material for 35-60 seconds, taking out after dipping, drying at 80-120 ℃ for example, and repeatedly dipping to form the adhesive layer D. The material of the adhesive layer D includes, for example, aliphatic sulfonic acid type waterborne polyurethane, specifically, aliphatic polyester type waterborne polyurethane, and the thickness of the adhesive layer D is controlled to be, for example, 0.1 to 10 μm. Then, the mold having the adhesive layer D formed thereon is immersed in a liquid containing Polyisoprene (PI) for, for example, 35 to 60 seconds, and after the immersion is completed, the mold is taken out, dried at, for example, 100 to 140 ℃, and repeatedly immersed to form the polyisoprene layer D. And (3) carrying out edge curling treatment, drying at 120-140 ℃ after edge curling, swelling with hot alkali water, carrying out water flushing demolding, adding a separant into demolding water, and drying by a dryer to obtain the composite polyurethane condom D.
The composite polyurethane condoms obtained in the above-mentioned examples and comparative examples of the present invention were subjected to the relevant performance tests, and the test results are shown in table 1.
TABLE 1 Performance test Table
As can be seen from the data in Table 1 and the examples, a special adhesive layer is added between two layers of materials, so that the two materials with different polarities can be firmly attached together, and the safety sleeve disclosed by the invention can be soaked in hot alkaline water or hot water at 50-70 ℃ for 1-10 minutes without layering. When materials with different polarities are adhered to the two sides of the adhesion layer, the advantages of the materials with different polarities can be exerted to the maximum extent, and therefore the obtained composite polyurethane condom has low modulus, high adhesion, high compatibility, high resilience and high adhesive force. For example, the steel wire is soaked in hot alkaline water or hot water at the temperature of 50-70 ℃ for 1-10 minutes, the delamination phenomenon is avoided, and the fracture elongation can reach 700% and 550%.
In conclusion, the special adhesive layer is added between the two layers of materials, so that the two materials with different polarities can be firmly attached together, and the layering phenomenon cannot occur. According to the invention, the film materials on the two sides of the bonding layer are bonded together, so that the film materials can exert respective material advantages. The adhesive layer has low modulus, high adhesiveness, high compatibility, high resilience and high adhesive force, and materials with different properties are combined through the boundary bridge effect, so that the safety sleeve disclosed by the invention is not layered after being soaked in hot alkaline water or hot water at the temperature of 50-70 ℃ for 1-10 minutes. In the present invention, through the synergistic interaction between unsaturated double bonds, amino groups, sulfonic groups and carboxyl groups, for example, the reaction with polyurethane or vinyl groups can be carried out, so that the adhesive layer has strong adhesion to the materials on both sides thereof, and further, the delamination phenomenon is not generated.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (10)
1. A composite polyurethane condom, comprising at least:
a first base material layer;
the bonding layer is formed on the first substrate layer;
the second base material layer is formed on the bonding layer;
the bonding layer comprises aliphatic sulfonic acid type waterborne polyurethane, the molecular chain of the aliphatic sulfonic acid type waterborne polyurethane contains amino, sulfonic group and carboxyl group, and the 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The thickness of the adhesive layer is 0.1 to 20 μm.
2. The composite polyurethane condom of claim 1, wherein the first substrate layer comprises any one of a natural latex film, a synthetic rubber film, a polyurethane film and a polyisoprene film.
3. The composite polyurethane condom of claim 1, wherein the second substrate layer comprises any one of a natural latex film, a synthetic rubber film, a polyurethane film and a polyisoprene film.
4. The composite polyurethane condom of claim 1, wherein the bond layer has an elongation at break of 500% or greater.
5. The composite polyurethane condom of claim 1, wherein the aliphatic sulfonic acid-type waterborne polyurethane comprises polyether/polyester polyol, aliphatic isocyanate, a cross-linking agent, a small molecule chain extender and a hydrophilic chain extender.
6. The composite polyurethane condom of claim 5, wherein the molecular weight of the polyether/polyester polyol is 400-6000, and the polyether/polyester polyol comprises any one or more of polypropylene oxide glycol, polytetramethylene ether glycol, poly neopentyl glycol adipate, poly 1, 4 butylene glycol adipate, poly 1, 6 hexanediol adipate, polycaprolactone and polycarbonate.
7. The composite polyurethane condom of claim 5, wherein the aliphatic isocyanate comprises one or more combinations of hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexylmethane-4, 4' -diisocyanate.
8. The composite polyurethane condom of claim 5, wherein the cross-linking agent comprises any one or more of trimethylolpropane, silanes, neopentyl glycol and castor oil.
9. The composite polyurethane condom of claim 5, wherein the hydrophilic chain extender is one or two of ethylenediamine ethanesulfonic acid sodium salt and dimethylolpropionic acid.
10. The preparation method of the composite polyurethane condom is characterized by at least comprising the following steps:
providing a mould;
forming a first substrate layer on the mold;
forming an adhesive layer on the first substrate layer;
forming a second substrate layer on the adhesive layer;
removing the mould to obtain the composite polyurethane condom;
the bonding layer comprises aliphatic sulfonic acid type waterborne polyurethane, the molecular chain of the aliphatic sulfonic acid type waterborne polyurethane contains amino, sulfonic group and carboxyl group, and the 100% modulus of the aliphatic sulfonic acid type waterborne polyurethane is less than or equal to 1.2N/mm2The thickness of the adhesive layer is 0.1 to 20 μm.
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| CN202010430483.4A CN111743680A (en) | 2020-05-20 | 2020-05-20 | Composite polyurethane condom and preparation method thereof |
| CN202310629837.1A CN116672151A (en) | 2020-05-20 | 2020-05-20 | Composite polyurethane condom and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113370548A (en) * | 2021-02-01 | 2021-09-10 | 桂林恒保健康防护有限公司 | Polyurethane condom forming method based on wet process |
| WO2021196569A1 (en) * | 2020-03-31 | 2021-10-07 | 兰州科天健康科技股份有限公司 | Pure polyurethane condom having adhesive layer, and preparation method therefor |
| WO2022057856A1 (en) * | 2020-09-21 | 2022-03-24 | 兰州科时西西里健康科技有限公司 | High-blasting-volume waterborne polyurethane condom and preparation method therefor |
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| US4817593A (en) * | 1983-11-28 | 1989-04-04 | Deseret Medical Inc. | Process for preparation of polyurethane condoms |
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| WO2021196569A1 (en) * | 2020-03-31 | 2021-10-07 | 兰州科天健康科技股份有限公司 | Pure polyurethane condom having adhesive layer, and preparation method therefor |
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| CN113370548A (en) * | 2021-02-01 | 2021-09-10 | 桂林恒保健康防护有限公司 | Polyurethane condom forming method based on wet process |
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| CN116672151A (en) | 2023-09-01 |
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