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A manufacturing method and technology for condoms, which can be applied in coating and other directions, can solve problems such as low efficiency, and achieve the effects of complete process, high production efficiency and wide application range.
Inactive Publication Date: 2005-09-14
SICHUAN BOAO BIOLOGICAL MATERIAL
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Because this method belongs to the preparation method of the laboratory stage, except that there is no complete set of technology that can be used for large-scale continuous production, its preparation is also a batch type, and the efficiency is low.
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[0036] The technological process of the embodiment of the present invention is as figure 1As shown, it includes mold passivation treatment, mold cleaning, mold drying and cooling, dipping solution preparation, dipping molding, drying, curling, powdering, demoulding and other processes. It should be noted that: 1. The mold passivation treatment is done before the mold is used for the first time. Two, because the embodiments of the present invention all adopt dip molding and drying each three times, so there are three dip molding units; and drying is because the mold shares a drying unit after dip molding 1 and 2 units, so there are two drying units. 3. The solvent evaporated from the drying unit can be recovered through the solvent recovery process. Each process flow is carried out in the direction indicated by the arrow in the figure.
[0037] The principle of the curling process is shown in figure 2 , 3 , among the figure 1 is a mould, 2 is a polyurethane condom, and 3 i...
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Abstract
The polyurethane condom producing process includes dissolving polyurethane grains in organic solvent, filtering, soaking mold after being treated specially in the solution to form, drying, rolling hem, powdering, demolding and other steps. The polyurethane condom product has excellent performance and the process is complete, easy to roll hem and demold and high in production efficiency.
Description
1. Technical field [0001] The invention belongs to the technical field of producing polyurethane condoms, and in particular relates to a method for continuously manufacturing various polyurethane condoms by dipping and molding. 2. Background technology [0002] To manufacture condoms with polyurethane material, there are many methods disclosed in the prior art, such as the disclosed vacuum forming method of USP4,576,156, the stretching and pressing forming method disclosed by USP5,601,092, the thermoplastic sealing molding method disclosed by USP5,833,915, and USP5,469,863 And USP5,571,567, USP6,217,815, USP6,231,326 and the dip molding method disclosed in CN1304944A. For the dip molding method, USP5,571,567 describes a formula and process for producing polyurethane gloves and condoms, in which various additives are used to improve the performance of dipped products, but the effect is not obvious, and the boiling point of the additives used is too high. It is difficult to r...
Claims
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