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CN-116494445-B - Method for producing natural latex rubber condom

CN116494445BCN 116494445 BCN116494445 BCN 116494445BCN-116494445-B

Abstract

The invention relates to the technical field of condom production, in particular to a production method of a natural latex rubber condom, which comprises the following steps of S1, checking all used raw materials, preparing raw latex, testing the performance of the raw latex, preparing a qualified raw latex product, S2, preparing solution, S3, preparing vulcanized latex, S4, curing, standing and filtering the vulcanized latex, S5, sending the vulcanized latex into a condom linkage machine production line, washing a mold, dipping the latex, demoulding to obtain a semi-finished product, after demoulding the condom, sending a semi-finished product foam isolating agent to a final drying process, and drying to obtain a finished product of the condom. The process method adopts two-time gum dipping treatment in the production process of the condom, can effectively ensure the uniformity and the forming effect of gum dipping, ensures the toughness and the whole tensile strength of the obtained condom product, and improves the service performance of the product.

Inventors

  • Shi Changshui
  • KANG MENG
  • ZHAO XIAOYANG
  • CHANG XINMIN

Assignees

  • 山东极美乳胶科技有限公司

Dates

Publication Date
20260508
Application Date
20230530

Claims (7)

  1. 1. The production method of the natural latex rubber condom is characterized by comprising the following steps: s1, checking all used raw materials, preparing raw latex, and testing the performance of the raw latex to obtain a raw latex qualified product; S2, preparing a solution; S3, preparing vulcanized latex, namely checking whether mechanical equipment is normal, peeling off rubber in a vulcanizing tank, closing a valve, pressing until a scale calibrated in advance is reached, wherein two people need to be present during pressing to prevent glue from running, adding tap water into a hot water tank, heating to 50-65 ℃, starting a vulcanizing tank stirrer, adding a proper amount of soft water, adding stabilizer casein, NF and ammonia water into the vulcanizing tank, starting a circulating hot water valve and a hot water circulating pump, starting heating to 43-55 ℃, then sequentially adding various dispersions, requiring accurate weighing and rechecking, slowly stirring and adding, and adding sulfur, an accelerator, an anti-aging agent and zinc oxide in sequence; s4, curing, standing and filtering vulcanized latex; s5, feeding the condom into a condom linkage machine production line, arranging an immersion tank stirrer, cleaning a filter screen, adding the filter screen into the tank, starting the stirrer, scraping off rubber, coagulum and sundries, flushing a rubber adding pipe to ensure smoothness, adjusting the rubber temperature and the rubber surface height, maintaining the relative humidity of an immersion chamber to be more than or equal to 30%, lifting the immersion tank to start production after the temperature of each part meets the process requirement, adjusting the immersion length in time, washing the mold, cleaning the mold by tap water, cleaning and soaking by soft water at the temperature of more than 65-75 ℃, requiring that the conductivity is less than or equal to 40, after the mold washing is finished, entering latex dipping, curling after dipping at two sides, carrying out a glue film drying process matched with each dipping, demoulding to obtain a semi-finished product, entering a semi-finished product post-treatment process after the condom is finished, carrying out a semi-finished foam isolating agent obtained after the demoulding, carrying out a final drying process after the semi-finished product foam isolating agent is finished, and carrying out packaging process after the dried condom to obtain a finished product of the condom; The specific method of the adhesive film drying process comprises the steps of carrying out hot air for one time at 160-180 ℃, carrying out hot air for two times at 160-180 ℃, carrying out primary drying at 80-100 ℃, carrying out secondary drying at 80-110 ℃ and carrying out hemming and drying at 40-70 ℃; The condom is conveyed in the horizontal state by adopting the secondary maintenance in the gum dipping and hemming treatment, and the uniform shaping effect of the product can be ensured by adopting a mode of drying and drying after the hemming is rotated by a fixed shaft in the horizontal state, so that the problem of uneven wall thickness of the condom caused by downward accumulation of gum solution due to drying and hemming in the vertical state in the traditional form is solved; the dipping environment is measured once a day, unqualified is adjusted in time, the glue temperature is maintained at 28-35 ℃, the dipping environment of a dipping chamber is tested at 30-42 ℃, the steam pressure is more than or equal to 0.50MPa, the dipping speed is 180-220 pieces/min, the dipping height is 210+5mm for the first time of the product, the second time is 5mm shorter than the first time of the product, the specific dipping height of the produced product is determined by a workshop to ensure that the product reaches the current fixed length, and the glue dipping material is required to have the total solid content of 43-50% in the first dipping, the chloroform value of three-four primary times, the total solid content of 43-50% in the second dipping, the chloroform value of three-four primary times and the total alkalinity of 0.4-0.6%.
  2. 2. The method for producing a natural latex rubber condom according to claim 1, wherein the temperature of the alkaline water tank is 40-50 ℃ and the concentration of the alkaline water is less than or equal to 1.0% when demoulding, and the height of the alkaline water is equal to the edge of the adhesive film; Positive soap in the anti-sticking agent tank is firstly prepared into 1.0% -1.5% solution, and 300ml-500ml of 30% positive soap solution is added per hour during normal production; the positive soap concentration of the demoulding groove is 0.1% -0.3%; If multiple bubbles appear in the demoulding groove, 50-100 g of silicone oil is added per hour to achieve the purpose of rapid bubble removal.
  3. 3. The production method of the natural latex rubber condom is characterized by comprising the following steps of (1) weighing casein, wetting and expanding with soft water for more than four hours, observing that the casein is fully dissolved and has no large particles, (2) adding ammonia water and borax to be fully dissolved, (3) using the ammonia water according to actual concentration conversion, and (4) covering the prepared solution for standby, wherein the 10% casein solution comprises the following components in parts by weight of 7 parts of casein, 3 parts of 15% ammonia water and 90 parts of soft water.
  4. 4. The method for producing the natural latex rubber condom according to claim 3, wherein the preparation process of the 10% NF solution comprises the following steps of accurately weighing NF, dissolving in soft water, intermittently stirring until the NF is fully dissolved, uniformly stirring and filtering when in use, wherein the weight proportion of each component of the 10% NF solution is as follows, NF12.38 parts and soft water is 100 parts.
  5. 5. A process for preparing the natural rubber latex condom as claimed in claim 4, wherein the rubber is stored for more than 72 hours, filtered by screen window filter screen, centrifuged by high-speed tube centrifuge at 15000 rpm, the residue is removed, the treated latex is stored for more than 6 hours, filtered again by stainless steel screen of 200 meshes, put into machine-adding tank, the regulating material is added, the total solid is regulated, the sample is sampled and measured quickly, the requirement of condom technological formula is met, the rubber is stored for more than 8 hours, the ammonia content is regulated in time when the ammonia content is lower than the index, and the rubber is required to be sent to machine-adding tank 8 hours before use.
  6. 6. The method for producing a natural latex rubber condom according to claim 5, wherein when the vulcanized latex is prepared and subjected to heat-insulating treatment for less than or equal to 5 hours, the water temperature in the heat treatment process is not higher than 65 ℃, the vulcanized latex is continuously stirred, the total solid content of the vulcanized latex is controlled to be 45+/-5%, and the chloroform value of the vulcanized latex is controlled to be three primary to three final; measuring chloroform value, discharging when the chloroform value reaches the requirement, and checking whether the valves of each parking tank are tightly closed or firmly tied by using discharging glue; Observing temperature change and sizing material condition during heat treatment and vulcanization, and waiting for the treatment process to be completed; after the treatment process is finished, closing water, electricity and heating valves, sealing sizing materials with plastic cloth, opening circulating cooling water if necessary, hanging a vulcanizing card, and cleaning; sampling and measuring after centrifugation, wherein the result meets the quality control standard requirement of condom production process.
  7. 7. The method of producing natural latex rubber condom of claim 6, wherein the compounding agent dispersion mainly comprises 50% sulfur dispersion, 40% accelerator PX, 40% ZDC dispersion, 50% zinc oxide dispersion, 264 mixed dispersion.

Description

Method for producing natural latex rubber condom Technical Field The invention relates to the technical field of condom production, in particular to a production method of a natural latex rubber condom. Background The condom is a round film product, and the edge of the cylinder mouth is rolled into an annular edge. The film is transparent and elastic, and is used as male contraceptive, and has the effect of preventing contact venereal disease infection during sexual intercourse. At present, condoms are mainly made of natural rubber or polyurethane as raw materials of the condoms. In the current state of condom improvement, the main focus is on how to improve the comfort level, such as reducing the rejection rate of the condom by improving the colloid formula or reducing the thickness of the condom by improving the mould so as to improve the sensory stimulation. A production process of condoms is disclosed in the patent literature disclosed as CN109223292A, for example, the main steps of the production process include sterilizing the condoms, namely, transferring a bare condom from a condom forming line into a hundred thousand-grade clean room for electric inspection and packaging, controlling the initial dyeable bacteria amount of the condoms, finally sterilizing, sterilizing the condoms packaged by the method by respectively adopting ethylene oxide sterilizing, gamma ray irradiation, high-energy electron beam or X-ray, wet heat sterilizing and low-temperature plasma, sterilizing by adopting an ethylene oxide gaseous bactericide, namely, placing the ethylene oxide sterilizing chamber by utilizing water vapor, preserving heat and preserving moisture, and sealing a space capable of adding negative pressure, packaging the whole condoms according to the capacity requirement of the sterilizing chamber, closing a feeding door of the sterilizing chamber, preheating the condoms in the sterilizing chamber, ionizing 58% hydrogen peroxide solution in a low-temperature state, so that various biological activity on medical instruments are lost, and the sterilizing cycle reaches the sterilizing cycle of 10-50 ml by single-40-50 ml of hydrogen peroxide, and the sterilizing cycle is ensured by the single-inhalation of the sterilizing capsule, and the sterilizing cycle reaches the sterilizing cycle of 50-ml. In summary, it can be seen that in the above prior art, the disinfection step is mainly optimized and improved when the condom is produced, but the existing process still adopted in the whole condom preparation product is that the condom prepared by the existing process has poor shaping effect and easy damage when demoulding, and the performance of the whole condom prepared by the existing process is relatively insufficient. Therefore, the invention researches and improves the problems existing in the condom production process in the prior art, and a new natural latex rubber condom production method capable of improving the condom product quality is designed to better solve the problems existing in the prior art. Disclosure of Invention The invention aims to solve one of the technical problems, and adopts the technical scheme that the production method of the natural latex rubber condom comprises the following steps: S1, checking all used raw materials, preparing raw latex, testing the performance of the raw latex, and obtaining a raw latex qualified product after testing; First, all raw materials used are checked to identify the package logo, model, weight and place of origin of the product. And then opening the package, and identifying whether the appearance of the used raw materials accords with the technical requirements or not, wherein the raw materials can be weighed for use. After use, the original record was prepared. S2, preparing a solution: Preparing stabilizer, dispersant solution and compounding agent dispersion according to the requirement; Wherein, the stabilizer adopts casein solution with the concentration of 10 percent, and the dispersant adopts NF solution with the concentration of 10 percent; The stabilizer and the dispersant are mainly used for improving the stability of the latex and facilitating the dispersion of various complexing agents during grinding, and the complexing agent dispersion can enhance the physical and mechanical properties of the rubber and improve the antioxidant and anti-aging properties. S3, preparing vulcanized latex: checking whether mechanical equipment is normal or not, peeling off rubber in the vulcanizing tank, closing a valve, pressing to a scale calibrated in advance, and keeping two people on site during pressing to prevent glue from running; Adding tap water into a hot water tank, heating to 50-65 ℃, starting a vulcanizing tank stirrer, adding a proper amount of soft water, adding stabilizers casein, NF and ammonia water into the vulcanizing tank, starting a circulating hot water valve and a hot water circulating pump, starting heating to 43-55 ℃, then sequentially a