CN113071039A - Preparation method of composite polyurethane condom - Google Patents

Preparation method of composite polyurethane condom Download PDF

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Publication number
CN113071039A
CN113071039A CN202110332819.8A CN202110332819A CN113071039A CN 113071039 A CN113071039 A CN 113071039A CN 202110332819 A CN202110332819 A CN 202110332819A CN 113071039 A CN113071039 A CN 113071039A
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China
Prior art keywords
drying
tank
temperature
soaking
condom
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CN202110332819.8A
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Chinese (zh)
Inventor
陈强
许迁
孔彩霞
刘一鸣
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Zhejiang Ruibo 001 Polymer Co.,Ltd.
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Zhejiang Qiang Ruibo Macromolecules Science And Technology Ltd
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Priority to CN202110332819.8A priority Critical patent/CN113071039A/en
Publication of CN113071039A publication Critical patent/CN113071039A/en
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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
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • 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
    • 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
    • B29C41/46—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/753—Medical equipment; Accessories therefor
    • B29L2031/7538—Condoms

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

The invention discloses a preparation method of a composite polyurethane condom, relating to the technical field of medical appliances, and comprising the following steps: (1) washing the die; (2) a hot immersion water tank; (3) primary drying; (4) soaking a first tank; (5) secondary drying; (6) soaking a second tank; (7) drying for three times; (8) soaking a third tank; (9) drying for four times; (10) soaking a No. four tank; (11) drying for five times; (12) curling; (13) drying for six times; (14) demoulding; (15) and (5) washing the die. According to the invention, the condom with the structure comprising the release layer, the polyurethane inner layer, the linking layer and the polyurethane outer layer from inside to outside is prepared by sequentially dipping the first groove, the second groove, the third groove and the fourth groove.

Description

Preparation method of composite polyurethane condom
The technical field is as follows:
the invention relates to the technical field of medical instruments, in particular to a preparation method of a composite polyurethane condom.
Background art:
condoms are a barrier type device that can be used during sexual intercourse to reduce the risk of sexually transmitted infections and involuntary pregnancy for women. The condom material is mainly latex, plastic or sheepskin film, both of which can protect the user from sexually transmitted infections during sexual intercourse, but since sheepskin condoms are made of material from the intestines of sheep, which have tiny openings, like human skin, they can only prevent unintended pregnancy, but cannot avoid sexually transmitted infections.
At present, domestic enterprises have mastered the preparation technology of condoms, but a certain gap still exists between the aspect of preparing ultrathin condoms and developed countries, and the softness, water resistance and alcohol resistance of the condoms are also required to be improved. Although a plurality of existing Chinese patents disclose methods for preparing condoms, the water resistance and the alcohol resistance of the condoms are not tested, or the water resistance and the alcohol resistance of the condoms are not good, so that the comprehensive performance of the condoms needs to be optimized by screening raw materials for preparing the condoms, designing the structures of the condoms and improving the preparation method of the condoms, and the use quality of the condoms needs to be improved.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a preparation method of a composite polyurethane condom, which is used for preparing a high-performance condom by using simple and easy process operation, simultaneously reducing the preparation cost and being suitable for large-scale production.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a preparation method of a composite polyurethane condom comprises the following steps:
(1) washing the die: repeatedly scrubbing the mould by using a brush;
(2) a hot immersion water tank: the temperature of the hot water tank is 50-100 ℃, the time of soaking the hot water tank is 3-10s, and the conductivity of water used in the hot water tank is less than or equal to 40 mu s-cm;
(3) primary drying: natural drying, air-blowing drying or oven drying is adopted, and the drying time is 5-20 s;
(4) soaking in a first tank: the first tank is a release agent blend, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(5) secondary drying: drying at 50-120 deg.C for 1-10 min;
(6) soaking in a second tank: the second tank is sulfonate type polyurethane emulsion, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(7) and (3) drying for three times: drying at 50-120 deg.C for 1-10 min;
(8) soaking in a third tank: the third tank is a linking agent blend, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(9) and (3) drying for four times: drying at 50-120 deg.C for 1-10 min;
(10) soaking in a No. four tank: the fourth tank is carboxylate polyurethane emulsion, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(11) and (4) five times of drying: drying at 80-140 deg.C for 1-10 min;
(12) edge curling: curling the glue film formed on the die;
(13) and (3) six times of drying: drying at 80-140 deg.C for 15-50 min;
(14) demoulding: brushing the product off the mold by using a brush roll;
(15) washing the die: the mold is repeatedly scrubbed by a hairbrush.
The mould is made of glass.
The temperature of the hot water tank is preferably 65-80 ℃.
The temperature of the glue tank of the first soaking tank is preferably 25 +/-5 ℃.
The temperature of the secondary drying is preferably 80 ℃. + -. 10 ℃.
The temperature of the glue tank of the second soaking tank is preferably 25 +/-5 ℃.
The temperature of the tertiary drying is preferably 80 ℃. + -. 10 ℃.
The temperature of the glue tank of the third soaking tank is preferably 25 +/-5 ℃.
The temperature of the four drying times is preferably 80 ℃. + -. 10 ℃.
The temperature of the glue tank of the No. four soaking tank is preferably 25 +/-5 ℃.
The temperature of the five drying times is preferably 100 ℃. + -. 10 ℃.
The temperature of the six drying is preferably 100 ℃. + -. 10 ℃.
The release agent blend in the first tank consists of a release agent, a defoaming agent, a wetting agent and water, and the dipping thickness can be ignored.
The sulfonate polyurethane emulsion in the second tank consists of sulfonate polyurethane and deionized water, the solid content is 10-35%, and the thickness of a film generated after dipping is 5-20 mu m.
The linker blend in tank three consists of linker, defoamer, wetting agent and water, and the impregnation thickness is negligible.
The carboxylate polyurethane emulsion in the fourth tank consists of carboxylate polyurethane and deionized water, the solid content is 10-35%, and the thickness of a film generated after dipping is 5-20 mu m.
The release agent is one or a mixture of more than two of calcium stearate, straight-chain alkane, hydroxyl silicone oil and dimethyl silicone oil, and the content is 1-15%, preferably 5-10%, and more preferably 7 +/-2% by mass.
The molecule chain segment of the sulfonate type polyurethane at least comprises a hydrophilic group with a sulfonate structure, the hydrophilic group provides a micromolecule chain extender, and the micromolecule chain extender is selected from one or a mixture of more than two of the following compounds a, b and c:
Figure BDA0002996920930000031
the linking agent is one or a mixture of more than two of organic siloxane, polyethylenimine, blocked isocyanate and polycarbodiimide, and the content is 0-0.5 percent by mass.
The defoaming agent is one or a mixture of more than two of organosilicon defoaming agent, organic fluorine defoaming agent and mineral oil defoaming agent, and the content is 0.01-0.1% by mass.
The wetting agent is one or a mixture of two of an organic silicon wetting agent and an acetylene glycol wetting agent, and the content of the wetting agent is 0.01-0.5% by mass.
The molecular chain segment of the carboxylate polyurethane at least comprises a hydrophilic group with a carboxylate structure, the hydrophilic group is provided for a small molecular chain extender, triethylamine is used for neutralization, and the small molecular chain extender is selected from one or a mixture of two of 2, 2-dimethylolpropionic acid (DMPA) and 2, 2-dimethylolbutyric acid (DMBA).
The interlinkage layer in the condom structure has the function of recoating effect, and because the compatibility of two polyurethanes with different structures adopted by the polyurethane inner layer and the polyurethane outer layer is poor, the interlinkage agent blend is required to prevent the layering phenomenon.
Because the application of the linking agent is directly related to whether the condom with the structure can be molded as expected and the using quality of the condom, the invention adopts the polyallylthiourethane as the linking agent besides the organic siloxane, the polyaziridine, the blocked isocyanate and the polycarbodiimide as the linking agent, and can further optimize the comprehensive performance of the condom.
The linking agent is poly (N-allyl-O-isobutyl-thiourethane) and has the weight-average molecular weight of (1-10) multiplied by 104。
The invention has the beneficial effects that:
(1) according to the invention, the condom with the structure comprising the release layer, the polyurethane inner layer, the linking layer and the polyurethane outer layer from inside to outside is prepared by sequentially dipping the first groove, the second groove, the third groove and the fourth groove, so that the preparation method is simple, has no special equipment requirement, has definite control parameters of preparation conditions, and is suitable for large-scale production, and the composition of the dipping solution is clear.
(2) The condom prepared by the invention has good flexibility, the modulus is less than or equal to 2MPa, the elongation at break reaches 500 percent, the burst volume is more than or equal to 8L, and the burst pressure is more than or equal to 5.0 kPa; the water resistance is good, the ring-shaped breaking force is more than or equal to 20N when the raw materials are boiled in pure water for 1 hour at 50 ℃; the alcohol resistance is good, the wine is taken out after being soaked in 75% alcohol for 5min, and the wine is immediately wiped dry, and the ring pulling breaking force is more than or equal to 10N.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
The formula is as follows:
Figure BDA0002996920930000041
Figure BDA0002996920930000051
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 5s
First tank material temperature 30±2℃ 35s
Temperature of material in second groove 30±2℃ 35s
Temperature of material in third groove 30±2℃ 35s
Temperature of material in No. four groove 30±2℃ 35s
Primary drying temperature Natural air drying 14s
Secondary drying temperature 80±5℃ 8min
Third drying temperature 80±5℃ 8min
Fourth drying temperature 80±5℃ 8min
Five times of drying temperature 80±5℃ 8min
Six times of drying temperature 80±5℃ 35min
Example 2 formulation:
Figure BDA0002996920930000052
Figure BDA0002996920930000061
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 3s
First tank material temperature 30±2℃ 20s
Temperature of material in second groove 30±2℃ 20s
Temperature of material in third groove 30±2℃ 20s
Temperature of material in No. four groove 30±2℃ 20s
Primary drying temperature Natural air drying 8s
Secondary drying temperature 110±5℃ 4min
Third drying temperature 110±5℃ 4min
Fourth drying temperature 110±5℃ 4min
Five times of drying temperature 110±5℃ 4min
Six times of drying temperature 110±5℃ 19min
Example 3 formulation:
Figure BDA0002996920930000062
Figure BDA0002996920930000071
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 5s
First tank material temperature 30±2℃ 35s
Temperature of material in second groove 30±2℃ 35s
Temperature of material in third groove 30±2℃ 35s
Temperature of material in No. four groove 30±2℃ 35s
Primary drying temperature Natural air drying 14s
Secondary drying temperature 80±5℃ 8min
Third drying temperature 80±5℃ 8min
Fourth drying temperature 80±5℃ 8min
Five times of drying temperature 80±5℃ 8min
Six times of drying temperature 80±5℃ 35min
Example 4 formulation:
Figure BDA0002996920930000072
Figure BDA0002996920930000081
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 3s
First tank material temperature 30±2℃ 20s
Temperature of material in second groove 30±2℃ 20s
Temperature of material in third groove 30±2℃ 20s
Temperature of material in No. four groove 30±2℃ 20s
Primary drying temperature Natural air drying 8s
Secondary drying temperature 110±5℃ 4min
Third drying temperature 110±5℃ 4min
Fourth drying temperature 110±5℃ 4min
Five times of drying temperature 110±5℃ 4min
Six times of drying temperature 110±5℃ 19min
Example 5 formulation:
Figure BDA0002996920930000082
Figure BDA0002996920930000091
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 5s
First tank material temperature 30±2℃ 35s
Temperature of material in second groove 30±2℃ 35s
Temperature of material in third groove 30±2℃ 35s
Temperature of material in No. four groove 30±2℃ 35s
Primary drying temperature Natural air drying 14s
Secondary drying temperature 80±5℃ 8min
Third drying temperature 80±5℃ 8min
Fourth drying temperature 80±5℃ 8min
Five times of drying temperature 80±5℃ 8min
Six times of drying temperature 80±5℃ 35min
Example 6 formulation:
Figure BDA0002996920930000092
Figure BDA0002996920930000101
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 3s
First tank material temperature 30±2℃ 20s
Temperature of material in second groove 30±2℃ 20s
Temperature of material in third groove 30±2℃ 20s
Temperature of material in No. four groove 30±2℃ 20s
Primary drying temperature Natural air drying 8s
Secondary drying temperature 110±5℃ 4min
Third drying temperature 110±5℃ 4min
Fourth drying temperature 110±5℃ 4min
Five times of drying temperature 110±5℃ 4min
Six times of drying temperature 110±5℃ 19min
Example 7
The organosiloxane XR500 from slot three in example 6 was replaced with poly (N-allyl-O-isobutyl-thiourethane) prepared by the following steps: adding 17.3g N-allyl-O-isobutyl-thiourethane and 0.8g benzoyl peroxide into 250mL tetrahydrofuran, carrying out heat preservation reaction for 5h under the reflux state, slowly adding water under stirring until no white precipitate is continuously separated out, filtering, drying filter residues, and crushing into powder to obtain the poly (N-allyl-O-isobutyl-thiourethane).
The formula is as follows:
Figure BDA0002996920930000102
Figure BDA0002996920930000111
the technological parameters are as follows:
item Parameter(s) Drying/impregnation time
Temperature of hot water tank 75±5℃ 3s
First tank material temperature 30±2℃ 20s
Temperature of material in second groove 30±2℃ 20s
Temperature of material in third groove 30±2℃ 20s
Temperature of material in No. four groove 30±2℃ 20s
Primary drying temperature Natural air drying 8s
Secondary drying temperature 110±5℃ 4min
Third drying temperature 110±5℃ 4min
Fourth drying temperature 110±5℃ 4min
Five times of drying temperature 110±5℃ 4min
Six times of drying temperature 110±5℃ 19min
The condom with the thickness of 25 microns +/-2 microns is prepared by respectively utilizing the formula and the process parameters, and the performance of the condom is compared with that of a commercially available product, wherein the performance comprises thickness, modulus, elongation at break, burst volume, burst pressure, water resistance and alcohol resistance.
The modulus was tested with reference to HG/T3321-.
The tests of thickness, elongation at break, burst volume and burst pressure were referenced to HG/T5456-2018.
And (3) testing water resistance: boiling in pure water at 50 deg.C for 1 hr, and ring pulling force is not less than 20N.
Testing alcoholic strength: soaking in 75% alcohol for 5min, taking out, and immediately wiping to dry, wherein the ring pull breaking force is not less than 10N.
The test results are shown in the following table.
Figure BDA0002996920930000121
As can be seen from the table 1, the condom prepared by the invention is far superior to the current commercial known condom in softness, water resistance and alcohol resistance; and the self-made poly (N-allyl-O-isobutyl-thiourethane) is adopted as a linking agent, so that the comprehensive performance of the condom can be further optimized.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A preparation method of a compound polyurethane condom is characterized in that: the method comprises the following steps:
(1) washing the die: repeatedly scrubbing the mould by using a brush;
(2) a hot immersion water tank: the temperature of the hot water tank is 50-100 ℃, the time of soaking the hot water tank is 3-10s, and the conductivity of water used in the hot water tank is less than or equal to 40 mu s-cm;
(3) primary drying: natural drying, air-blowing drying or oven drying is adopted, and the drying time is 5-20 s;
(4) soaking in a first tank: the first tank is a release agent blend, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(5) secondary drying: drying at 50-120 deg.C for 1-10 min;
(6) soaking in a second tank: the second tank is sulfonate type polyurethane emulsion, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(7) and (3) drying for three times: drying at 50-120 deg.C for 1-10 min;
(8) soaking in a third tank: the third tank is a linking agent blend, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(9) and (3) drying for four times: drying at 50-120 deg.C for 1-10 min;
(10) soaking in a No. four tank: the fourth tank is carboxylate polyurethane emulsion, the temperature of the glue tank is 0-40 ℃, and the dipping time is 10-40 s;
(11) and (4) five times of drying: drying at 80-140 deg.C for 1-10 min;
(12) edge curling: curling the glue film formed on the die;
(13) and (3) six times of drying: drying at 80-140 deg.C for 15-50 min;
(14) demoulding: brushing the product off the mold by using a brush roll;
(15) washing the die: the mold is repeatedly scrubbed by a hairbrush.
2. The method of making a composite polyurethane condom of claim 1, wherein: the mould is made of glass.
3. The method of making a composite polyurethane condom of claim 1, wherein: the temperature of the hot water tank is preferably 65-80 ℃.
4. The method of making a composite polyurethane condom of claim 1, wherein: the temperature of the glue grooves of the first soaking groove, the second soaking groove, the third soaking groove and the fourth soaking groove is preferably 25 +/-5 ℃.
5. The method of making a composite polyurethane condom of claim 1, wherein: the temperature of the secondary drying, the tertiary drying and the quartic drying is preferably 80 +/-10 ℃.
6. The method of making a composite polyurethane condom of claim 1, wherein: the temperature of the five-time drying and the six-time drying is preferably 100 ℃ +/-10 ℃.
7. The method of making a composite polyurethane condom of claim 1, wherein: the release agent blend in the first tank consists of a release agent, a defoaming agent, a wetting agent and water, and the dipping thickness can be ignored.
8. The method of making a composite polyurethane condom of claim 1, wherein: the sulfonate polyurethane emulsion in the second tank consists of sulfonate polyurethane and deionized water, the solid content is 10-35%, and the thickness of a film generated after dipping is 5-20 mu m.
9. The method of making a composite polyurethane condom of claim 1, wherein: the linker blend in tank three consists of linker, defoamer, wetting agent and water, and the impregnation thickness is negligible.
10. The method of making a composite polyurethane condom of claim 1, wherein: the carboxylate polyurethane emulsion in the fourth tank consists of carboxylate polyurethane and deionized water, the solid content is 10-35%, and the thickness of a film generated after dipping is 5-20 mu m.
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CN1484582A (en) * 2000-12-28 2004-03-24 3M Multi-layered article comprising a first lager of a thermoset polyurethane
US20050072432A1 (en) * 2003-06-27 2005-04-07 Inmed Corporation Urinary condom and method for its manufacture
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CN106280396A (en) * 2016-08-30 2017-01-04 上海强睿博高分子科技有限公司 Condom for women and preparation method thereof
CN107411871A (en) * 2017-03-14 2017-12-01 上海强睿博高分子科技有限公司 A kind of multilayer sandwiched polyurethane condom and preparation method thereof
CN109923159A (en) * 2016-11-03 2019-06-21 康乐控股有限公司 Polyisoprene latex graphene composite material and preparation method thereof
CN111286993A (en) * 2020-04-13 2020-06-16 丹东优耐特纺织品有限公司 Down jacket fabric treatment method by hot rolling lamination instead of sewing
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4684490A (en) * 1983-11-28 1987-08-04 Deseret Medical, Inc. Process for preparation of polyurethane condoms
CN1484582A (en) * 2000-12-28 2004-03-24 3M Multi-layered article comprising a first lager of a thermoset polyurethane
US20050072432A1 (en) * 2003-06-27 2005-04-07 Inmed Corporation Urinary condom and method for its manufacture
CN101934101A (en) * 2010-08-24 2011-01-05 北京迪玛克医药科技有限公司 Hydrophilic coating for surface of medical apparatus and preparation method thereof
CN106280396A (en) * 2016-08-30 2017-01-04 上海强睿博高分子科技有限公司 Condom for women and preparation method thereof
CN109923159A (en) * 2016-11-03 2019-06-21 康乐控股有限公司 Polyisoprene latex graphene composite material and preparation method thereof
CN107411871A (en) * 2017-03-14 2017-12-01 上海强睿博高分子科技有限公司 A kind of multilayer sandwiched polyurethane condom and preparation method thereof
CN111286993A (en) * 2020-04-13 2020-06-16 丹东优耐特纺织品有限公司 Down jacket fabric treatment method by hot rolling lamination instead of sewing
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

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