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Method for preparing latex condoms

A condom and dipping technology, applied to male contraceptives, coatings, etc., can solve the problem of no minimum requirements for harmful substances

Inactive Publication Date: 2012-05-30
LVSHEN BEIJING LATEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country's condom inspection standards GB7544-2004 and disposable sanitary products hygiene standards GB15979-2002 have neither the minimum amount of harmful substances nor the minimum requirements for the materials used.

Method used

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  • Method for preparing latex condoms
  • Method for preparing latex condoms

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing a condom, comprising the following steps;

[0040] (1) Raw material preparation. Heat the raw material at 35°C for 6 hours, stop the vulcanization when the chloroform value reaches the third to fourth initial stage, and wait for use after dehydration; the components and parts by mass of the raw material are:

[0041] 60% concentrated latex 800 parts

[0042] 10% casein 12 servings

[0043] 10% sodium methylene dinaphthalene sulfonate 4.15 parts

[0044] 50% sulfur 7.9 parts

[0045] 40% zinc N-ethyl N-phenyldithiocarbamate 4.0 parts

[0046]50% zinc diethyldithiocarbamate 1.2 parts

[0047] 50% zinc oxide 3.9 parts,

[0048] 40% thiobis-(3,5)-di-tert-butyl-4-hydroxy 11 parts

[0049] 40% 2,6-di-tert-butyl-4-methylphenol 15 parts

[0050] Potassium hydroxide 1.3 parts

[0051] 140 parts of 25% ammonia solution

[0052] Soft water 30 parts

[0053] The percentages are all percentages by mass.

[0054] (2) Model process. After the condom...

Embodiment 2

[0063] A method for preparing a condom, comprising the following steps;

[0064] (1) Raw material preparation. Heat the raw material at 35°C for 6 hours, stop the vulcanization when the chloroform value reaches the third to fourth initial stage, and wait for use after dehydration; the components and parts by mass of the raw material are:

[0065] 60% concentrated latex 800 parts

[0066] 10% casein 12 servings

[0067] 10% sodium methylene dinaphthalene sulfonate 4.15 parts

[0068] 50% sulfur 7.9 parts

[0069] 40% zinc N-ethyl N-phenyldithiocarbamate 4.0 parts

[0070] 50% zinc diethyldithiocarbamate 1.2 parts

[0071] 50% zinc oxide 3.9 parts,

[0072] 40% thiobis-(3,5)-di-tert-butyl-4-hydroxy 11 parts

[0073] 40% 2,6-di-tert-butyl-4-methylphenol 15 parts

[0074] Potassium hydroxide 1.3 parts

[0075] 140 parts of 25% ammonia solution

[0076] Soft water 30 parts

[0077] The percentages are all percentages by mass.

[0078] (2) Model process. After the condo...

Embodiment 3

[0085] A method for preparing a condom, comprising the following steps;

[0086] (1) Raw material preparation. Heat the raw material at 35°C for 6 hours, stop the vulcanization when the chloroform value reaches the third to fourth initial stage, and wait for use after dehydration; the components and parts by mass of the raw material are:

[0087] 60% concentrated latex 800 parts

[0088] 10% casein 12 servings

[0089] 10% sodium methylene dinaphthalene sulfonate 4.15 parts

[0090] 50% sulfur 7.9 parts

[0091] 40% zinc N-ethyl N-phenyldithiocarbamate 4.0 parts

[0092] 50% zinc diethyldithiocarbamate 1.2 parts

[0093] 50% zinc oxide 3.9 parts,

[0094] 40% thiobis-(3,5)-di-tert-butyl-4-hydroxy 11 parts

[0095] 40% 2,6-di-tert-butyl-4-methylphenol 15 parts

[0096] Potassium hydroxide 1.3 parts

[0097] 140 parts of 25% ammonia solution

[0098] Soft water 30 parts

[0099] Said percentages are mass percentages;

[0100] (2) Model process. After the condom mode...

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Abstract

The invention relates to a method for preparing condoms, in particular to a method for preparing latex condoms. The method for preparing latex condoms comprises preparation of raw materials, a modeling process, a demolding process, a washing process, a post-curing process and an electrical inspection process, wherein the cleaning solution in the washing process comprises the following components in percentage by mass: 0.5 to 5 percent of borax, 1 to 8 percent of fruit acid, 2 to 9 percent of vitamin C, 1 to 8 percent of cellulose, 1 to 3 percent of silicon dioxide, 0.2 to 3 percent of alkylbenzene sulfonic acid, 0.1 to 3 percent of guar gum, 0.2 to 2 percent of sodium metasilicate pentahydrate, and the balance of soft water up to 100%. Detection through high-performance liquid chromatography and capillary gas chromatography-mass spectrometry proves that the latex condoms prepared according to the method is less than 0.01 mg / kg in remaining N-nitrosamines of nitrosamines, thereby having use safety and reliability and greatly reducing carcinogenic risk.

Description

technical field [0001] The invention relates to a method for preparing a condom. Background technique [0002] Family planning is a basic national policy of our country. As a simple and effective contraceptive method, condoms have been widely promoted in countries all over the world and accepted by the public. The materials commonly used in condoms today are latex and rubber. [0003] The main component of latex is polyisoprene, with a content of more than 90%. Its structural formula: (CH2=C-CH=CH2)n, and its molecular weight is between 100,000 and 1.8 million. Latex has good film-forming properties and elasticity, high wet gel strength, good mechanical properties, high mechanical stability, and good stability. After latex is processed, it can achieve very excellent comprehensive performance. Recent studies have shown that many latex condoms contain excessive amounts of strong carcinogens - nitrosamines. The reason is that in the production of condoms, in order to make t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/00C08K13/02C08K3/22C08K5/39B29C41/14B29C41/34B29C71/00B29C35/02B29C71/02A61F6/04
Inventor 杨全力顾雪松陈振文封棣刘延常扎根周庆峰赵军伟王鲁宁
Owner LVSHEN BEIJING LATEX
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