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A kind of polyurethane condom and preparation method thereof

A condom and polyurethane technology, applied in the direction of male contraceptives, coatings, etc., can solve the problems of difficult demoulding, difficult curling, and inconvenient wearing, and achieve the effect of ensuring ultra-thinness and overcoming difficult curling

Active Publication Date: 2017-08-25
上海惠沃盛健康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the first aspect, the present invention relates to a polyurethane condom, in which a section of natural latex, polyisoprene or a mixture of the two is inlaid at the edge of the polyurethane condom, which not only ensures the ultra-thinness of the main part of the condom, but also overcomes the The disadvantages of pure polyurethane condoms are that they are difficult to curl, difficult to release and inconvenient to wear

Method used

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  • A kind of polyurethane condom and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment relates to a polyurethane condom and its preparation method, which is composed of the following steps, wherein a district, b district, c district and d district are as follows figure 1 Shown:

[0026] Step 1, spray a layer of natural latex on the condom mold as zone a, bake at 70°C for 1 min, and the length of zone a is 60mm;

[0027] Step 2, dipping 3 layers of water-based polyurethane emulsion as zone b, each layer is baked at 110°C for 1 min, the b zone overlaps with the a zone, and this overlapping part is used as c zone;

[0028] Step 3, crimp the above-mentioned area a, roll it to or beyond area c, and use the remaining part as area d, then bake at 90°C for 20 minutes, the length of area d is 180mm, and the length of area b - the length of area d = 0mm;

[0029] Step 4, dipping a layer of release agent solid powder suspension on the outside of zone d, and baking at 80°C for 15 minutes;

[0030] Step 5: Cooling, demoulding, and post-processing to...

Embodiment 2

[0032] This embodiment relates to a polyurethane condom and its preparation method, which is composed of the following steps, wherein a district, b district, c district and d district are as follows figure 1 Shown:

[0033] Step 1: Apply a layer of polyisoprene as area a by brushing on the condom mold, bake at 80°C for 3 minutes, and the length of area a is 80mm;

[0034] Step 2, dipping a layer of water-based polyurethane emulsion as zone b, and baking at 70°C for 3 minutes, the zone b overlaps with zone a, and this overlapping part is used as zone c;

[0035] Step 3, crimp the above-mentioned zone a, roll it to or beyond zone c, and use the remaining part as zone d, then bake at 100°C for 30 minutes, the length of zone d is 155mm, and the length of zone b - the length of zone d = 2mm;

[0036] Step 4, dipping a layer of release agent solid powder suspension on the outside of zone d, and baking at 90°C for 20 minutes;

[0037] Step 5: Cooling, demoulding, and post-processi...

Embodiment 3

[0039] This embodiment relates to a polyurethane condom and its preparation method, which is composed of the following steps, wherein a district, b district, c district and d district are as follows figure 1 Shown:

[0040] Step 1: Apply a layer of natural latex on the condom mold by roller coating as zone a, bake at 90°C for 4 minutes, and the length of zone a is 100mm;

[0041] Step 2, dipping two layers of water-based polyurethane emulsion as zone b, and baking each layer at 80°C for 5 minutes, the b zone overlaps with the a zone, and this overlapping part is used as c zone;

[0042] Step 3, crimp the above-mentioned area a, roll it to or beyond area c, and use the remaining part as area d, then bake at 110°C for 1 min, the length of area d is 160mm, and the length of area b - the length of area d = 5mm;

[0043] Step 4, impregnating a layer of release agent solid powder suspension on the outside of zone d, and baking at 100°C for 30 minutes;

[0044] Step 5: Cooling, de...

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Abstract

A polyurethane condom and a preparation method therefor. A section of nature latex, polyisoprene or a mixture of the nature latex and polyisoprene is bordered at a curled edge of a polyurethane condom. The preparation method comprises the following steps: step I, smearing a layer of nature latex, polyisoprene or a mixture of the nature latex and the polyisoprene on a condom mold as an area a, and baking; step II, impregnating a water-based polyurethane emulsion as an area b, baking, overlapping the area b and the area a, and taking an overlapped portion as an area c; step III, curling the area a to reach the area c or to exceed the area c, taking a remaining portion as an area d, and then baking; step IV, coating or impregnating the exterior of the area d with a layer of releasing agent, and baking; and step V, cooling, demolding, and carrying out after-treatment to obtain the polyurethane condom. The polyurethane condom not only guarantees an ultrathin property of a main body portion of the condom, but also can overcome the disadvantages of a pure polyurethane condom such as difficulty in curling, demolding and loosening when in use, inconvenience in wearing, and the like.

Description

technical field [0001] The invention relates to a condom and a preparation method thereof, in particular to a polyurethane condom and a preparation method thereof. Background technique [0002] Ultra-thin condoms are a major trend among consumers today. Condoms made of natural latex and polymerized isoprene have a thickness of more than 35 μm, and those made of less than 35 μm have the disadvantage of low strength and the risk of rupture during use, which cannot meet the ultra-thin requirements of some consumers. Polyurethane material can be made into condoms below 35μm, of which Japanese products are the main ones, occupying a certain market share in the market. [0003] CN101961279A (published on February 02, 2011) discloses a double-layer sandwich or multi-layer sandwich type high-barrier condom and a preparation method thereof. The preparation method of the condom includes: vulcanizing natural latex; mixing polyurethane or polyethylene Non-natural latex polymer materia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F6/04B29C41/14
CPCA61F6/04
Inventor 陈强许迁
Owner 上海惠沃盛健康科技有限公司
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