CN-122011481-A - Preparation method of chloroprene rubber reclaimed material closed-cell secondary foaming material

CN122011481ACN 122011481 ACN122011481 ACN 122011481ACN-122011481-A

Abstract

The invention discloses a preparation method of a chloroprene rubber reclaimed material closed-cell secondary foaming material, which comprises 35-45 parts of chloroprene rubber, 30-40 parts of premixed sizing material A, 20-30 parts of kaolin, 20-30 parts of talcum powder, 2-4 parts of magnesium oxide, 10-15 parts of paraffin oil, 5-7 parts of zinc oxide, 2-4 parts of EZ, 2-4 parts of foaming agent, 100 parts of chloroprene rubber reclaimed material A and 120-140 parts of carbon black, wherein the chloroprene rubber reclaimed material comprises 35-45 parts of NBR/PVC reclaimed powder, 15-25 parts of chloroprene rubber, 25-35 parts of talcum powder and 5-15 parts of paraffin oil.

Inventors

HOU RUHONG
CHEN YIJI

Assignees

易宝（福建）高分子材料股份公司

Dates

Publication Date: 20260512
Application Date: 20211231

Claims (4)

1. The preparation method of the chloroprene rubber reclaimed material closed-cell secondary foaming material is characterized by comprising the following steps of: Putting kaolin, talcum powder, magnesium oxide and softener paraffin oil into a banburying chamber, stirring, putting a premixed sizing material A and chloroprene rubber into a position of two thirds of a pressing weight after putting the premixed sizing material A and chloroprene rubber into the banburying machine, reacting for a period of time, fully pressing down the weight, reacting for a period of time, lifting the weight, turning over, further pressing down the banburying weight, lifting the weight, repeating the kneading step of the pressing weight for a plurality of times, continuously filling cooling water in the kneading process, observing the material temperature of the banburying chamber until the temperature is 115-125 ℃, putting zinc oxide, EZ and foaming agent, pressurizing the weight, lifting the weight for a period of time, repeatedly pressurizing the kneading step of the pressing weight for a plurality of times, and pouring to obtain a rubber compound; Putting the rubber compound obtained in the step (I) into an open mill, continuously introducing cooling water into a roller of the open mill, controlling the thickness of the roller, thinning, cooling, cutting, and standing to obtain a mixture B; putting the mixture B into a calender, continuously introducing cooling water into a roller of the calender, controlling the thickness of the roller, carrying out thickness calendering, standing and cooling to obtain a rubber compound; Step four, putting the rubber compound obtained in the step three into an open mill, controlling the temperature to be 80-90 ℃ for open milling, further mixing the raw materials of each component, and preheating to obtain a preheated material; putting the preheated material into an extruder for extrusion molding, cutting, standing and cooling to obtain a material sheet; Putting the material sheet into an oil pressure primary vulcanizing machine mold for foaming, and releasing pressure to obtain a primary vulcanizing foaming material; step seven, the primary vulcanized foaming material is put into a foaming machine mold to be foamed in the foaming machine mold, and the secondary foaming material is obtained after pressure relief; And (eighth), the secondary foaming material is naturally cooled at room temperature and is put in storage or processed and molded.
2. The method for preparing the closed-cell secondary foaming material of the chloroprene rubber reclaimed material according to claim 1, wherein the premixed rubber A consists of the chloroprene rubber reclaimed material and carbon black; the chloroprene rubber reclaimed material comprises NBR/PVC reclaimed powder, chloroprene rubber, talcum powder and paraffin oil.
3. The method for preparing the closed-cell secondary foaming material of the neoprene reclaimed material according to claim 2, which is characterized in that the method for preparing the neoprene reclaimed material comprises the following steps: The method comprises the steps of (1) putting NBR/PVC reclaimed powder, talcum powder and paraffin oil into an internal mixer, not pressing down a heavy hammer, putting into chloroprene rubber after stirring for a period of time, pressing down the displacement distance of two thirds of the heavy hammer to enable the powder to be coarsely mixed with the chloroprene rubber, preventing the powder from overflowing into a banburying chamber, after reacting for a period of time, pressing down the whole part of the banburying heavy hammer, pressurizing, lifting up the heavy hammer and turning over, pressing down the banburying heavy hammer again, lifting up the heavy hammer, repeating the step of pressing down the heavy hammer repeatedly, continuously filling cooling water for cooling in the kneading process, observing the material temperature of the banburying chamber, and pouring to obtain banburying; And (II) putting the banburying rubber obtained in the step (I) into an open mill, continuously introducing cooling water into a roller of the open mill, controlling the thickness of the roller, reducing the temperature of the rubber material, dividing, and standing to obtain the chloroprene rubber reclaimed material.
4. The method for preparing the chloroprene rubber reclaimed material closed-cell secondary foaming material according to claim 2, wherein the method for preparing the premixed sizing material A is as follows: The method comprises the steps of firstly, putting carbon black and chloroprene rubber reclaimed materials into an internal mixer, then pressing down the displacement distance of two thirds of a heavy hammer, reacting for a period of time, then pressing down the whole heavy hammer of the internal mixer, lifting the heavy hammer, turning over, pressing down the heavy hammer again, lifting the heavy hammer, repeating the kneading step of the heavy hammer for a plurality of times, continuously filling cooling water in the kneading process, and pouring to obtain a mixture; And (II) throwing the mixture obtained in the previous step into an open mill table, continuously introducing cooling water into an open mill roller, controlling the thickness of the roller, thinning, cooling, cutting, and standing to obtain the premixed sizing material A.

Description

Preparation method of chloroprene rubber reclaimed material closed-cell secondary foaming material Technical Field The invention relates to the technical field of foaming materials, in particular to a preparation method of a chloroprene rubber reclaimed material closed-cell secondary foaming material. Background The neoprene is widely applied to various industries along with the maturity of domestic production technology, and has better elasticity, wear resistance, crack resistance, wet skid resistance, higher tensile strength and tearing strength, and better chemical resistance, weather resistance and cold resistance. Under the condition that the requirements of the international society on the exploitation and utilization of global resources are increased, the underwater 80-meter individual deep diving equipment protective equipment in Japanese and Korean areas takes the dominant role, and meanwhile, the call for recycling the resources is put forward in a dispute, the corresponding global recycling standard GRS4.0 standard and global recycling standard RCS2.0 standard are formulated, and rubber and plastic product production enterprises are restrained from reducing the use amount of the petroleum derivatives of the global ecological resources. The utilization rate of the waste is improved, and the recycling of resources is improved. And as demand increases, price rises year by year, and light weight and cost reduction are mainstream development trends. The neoprene belongs to petroleum derivative petrochemical rubber materials, the reclaimed materials are vulcanized and shaped thermosetting elastomers, the poor dispersibility after the processing and the fusion are a great difficulty for the foaming materials, and the process is improved to improve the dispersibility, the cost is low, the comprehensive properties are good, so that the application range is widened, and breakthrough needs to be made. Disclosure of Invention The application provides the preparation method of the closed-cell secondary foaming material of the chloroprene rubber reclaimed material, which solves the technical problem that the performance of the foaming material does not meet the use requirement due to the use of the chloroprene rubber reclaimed material when the foaming material taking the chloroprene rubber as a main body is prepared in the prior art, and realizes that the chloroprene rubber reclaimed material is applied to the preparation of the foaming material, and meanwhile, the foaming material with excellent performance is obtained. The application provides a chloroprene rubber reclaimed material closed-cell secondary foaming material, which comprises 35-45 Parts of chloroprene rubber 30-40 Parts of premixed sizing material A 20-30 Parts of kaolin 20-30 Parts of talcum powder 2-4 Parts of magnesium oxide Paraffin oil 10-15 parts 5-7 Parts of zinc oxide EZ 2-4 parts 2-4 Parts of foaming agent The premixed sizing material A consists of 100 parts of neoprene reclaimed materials and 120-140 parts of carbon black; The chloroprene rubber reclaimed material comprises 35-45 parts of NBR/PVC reclaimed powder, 15-25 parts of chloroprene rubber, 25-35 parts of talcum powder and 5-15 parts of paraffin oil. Further, the preparation method of the neoprene reclaimed material comprises the following steps: The method comprises the steps of (1) putting NBR/PVC reclaimed powder, talcum powder and paraffin oil into an internal mixer, not pressing down a heavy hammer, putting into chloroprene rubber after stirring for a period of time, pressing down the displacement distance of two thirds of the heavy hammer to enable the powder to be coarsely mixed with the chloroprene rubber, preventing the powder from overflowing into a banburying chamber, after reacting for a period of time, pressing down the whole part of the banburying heavy hammer, pressurizing, lifting up the heavy hammer and turning over, pressing down the banburying heavy hammer again, lifting up the heavy hammer, repeating the step of pressing down the heavy hammer repeatedly, continuously filling cooling water for cooling in the kneading process, observing the material temperature of the banburying chamber, and pouring to obtain banburying; And (II) putting the banburying rubber obtained in the step (I) into an open mill, continuously introducing cooling water into a roller of the open mill, controlling the thickness of the roller, reducing the temperature of the rubber material, dividing, and standing to obtain the chloroprene rubber reclaimed material. Further, the preparation method of the premix compound A comprises the following steps: The method comprises the steps of firstly, putting carbon black and chloroprene rubber reclaimed materials into an internal mixer, then pressing down the displacement distance of two thirds of a heavy hammer, reacting for a period of time, then pressing down the whole heavy hammer of the internal mixer, lifting the heavy hammer, turning over,