Use of thermoplastic polymer as waterborne polyurethane condom die material and method of producing condom die

A thermoplastic polymer and water-based polyurethane technology, applied in coatings and other directions, can solve problems such as short effective time, product performance and biosafety performance risks, and inability to carry out continuous production, so as to reduce operating procedures, ensure uniformity, and increase qualification. rate effect

Inactive Publication Date: 2020-08-21
利洁时健康有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can solve the problem of film formation and demoulding of water-based polyurethane materials on glass, but the effective time of use after alkylation treatment is about 30 hours, and continuous production cannot be carried out. At the same time, the effect of alkylation treatment changes in real time , the product quality stability of water-based polyurethane condoms in the production process cannot be effectively guaranteed
2. Pre-coat a layer of release agent on the surface of glass or stainless steel. This method can solve the problem of continuous production, but the release agent will enter the condom material during the production process, which has potential for product performance and biological safety. risks of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The condom mold adopts the method of three-point glue injection inside the open end of the tail and two-stage injection molding. The polyethylene is injected into the mold tube body. The polyethylene material is ExxonMobil Chemical Enable high-performance polyethylene. The tube body is Cylindrical, the length of section 1 from the closed end of the head to the open end of the tail is 220 mm, and the first section has a slope of 0.2° from the closed end of the head to the open end of the tail, so that the diameter of the closed end of the head is smaller than the open end of the tail; The length of the 2 paragraphs is unlimited. Tube wall thickness 2mm; surface roughness Ra≤0.1; verticality, deflection of vertical placement is less than 1°; concentricity, deflection of the top of the fixed mold rotating seminal vesicle is less than 1mm.

Embodiment 2

[0027] The condom mold adopts the method of three-point glue injection inside the open end of the tail and two-stage injection molding. The polypropylene mold tube body is formed by injection molding. The polypropylene material is Hanwha Total Petrochemical TB54I. The tube body is cylindrical and one section of the tube body is made from scratch. The length from the closed end of the head to the open end of the tail is 230mm, and the first section has a 3° slope from the closed end of the head to the open end of the tail, so that the diameter of the closed end of the head is smaller than the open end of the tail; the length of the second section is not limited. Tube wall thickness 5mm; surface roughness Ra≤0.1; verticality, vertical deflection is less than 1°; concentricity, deflection of the top of the fixed mold rotating seminal vesicle is less than 1mm.

Embodiment 3

[0029] The condom mold adopts the method of three-point glue injection inside the open end of the tail and two-stage injection molding. The polycarbonate injection molds the mold tube body. The polycarbonate material is Bayer 2407. The tube body is cylindrical. The length from the closed end to the open end of the tail is 240mm, and the first section has a 5° slope from the closed end of the head to the open end of the tail, so that the diameter of the closed end of the head is smaller than the open end of the tail; the length of the second section is not limited. Tube wall thickness 10mm; surface roughness Ra≤0.1; verticality, vertical deflection less than 1°; concentricity, fixed mold rotating seminal vesicle top deflection less than 1mm.

[0030] The method of using the condom mold of embodiment 1-3: the mold is suspended vertically, immersed in the water-based polyurethane liquid, the mold is taken out, and the mold is demoulded after the polyurethane is formed into a film ...

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Abstract

The invention discloses use of a thermoplastic polymer as a die material for dip forming a waterborne polyurethane condom and a method of producing a condom die. Polyurethane can form a film uniformlydirectly on the thermoplastic polymer condom die to be demolded without an internal separant, so that the uniformity of the polyurethane film and introduction of other substances are guaranteed. After polyurethane forms the film uniformly directly on the thermoplastic polymer condom die, post-treatment sizing on performance of raw materials can be carried out directly without adding other steps such as demolding, so that the operation flow is reduced and the percent of pass of products is improved.

Description

technical field [0001] The invention belongs to the technical field of water-based condom dipping molding technology, and specifically relates to the use of thermoplastic polymers as water-based polyurethane condom mold materials and a method for producing condom molds. Background technique [0002] Condom is currently the most widely used and simple device for contraception and prevention of sexually transmitted diseases in the world. The existing products mainly include natural latex rubber condoms and water-based polyurethane condoms. [0003] Natural latex rubber condoms mainly use glass molds in the dipping molding process, and very few use stainless steel metal molds. Since the surface tension of natural latex rubber materials is close to that of glass and stainless steel metals, it will form a film on the surface of these two materials. The adhesion force is small, and the natural latex rubber material has swelling characteristics in an alkaline environment, so the na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/40B29C33/38B29C41/38
CPCB29C33/3842B29C33/40B29C41/38
Inventor 戴家兵陈亮冯林林
Owner 利洁时健康有限公司
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