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CN-122011603-A - Wear-resistant floor mat for cab and preparation method thereof

CN122011603ACN 122011603 ACN122011603 ACN 122011603ACN-122011603-A

Abstract

The invention relates to the technical field of high polymer materials and discloses a floor mat for a wear-resistant cab and a preparation method thereof, wherein the floor mat comprises 100 parts of ethylene propylene diene monomer, 20-30 parts of metallocene polyolefin elastomer, 25-35 parts of modified ultra-high molecular weight polyethylene powder, 40-50 parts of calcined kaolin, 3-4 parts of nano zinc oxide, 0.5-0.8 part of stearic acid, 0.5-0.8 part of an anti-aging agent, 1.5-2.0 parts of a crosslinking auxiliary agent, 2.0-2.5 parts of a first peroxide crosslinking agent and 0.5-0.8 part of a second peroxide crosslinking agent. The method comprises the steps of mixing raw materials to obtain a mixed rubber, adding a cross-linking agent into the mixed rubber for tabletting, and carrying out first-stage vulcanization to lock particle interfaces and second-stage vulcanization to be deeply cured. The invention enables the floor pad to have the characteristics of high wear resistance, skid resistance and low odor through interfacial chemical bonding and gradient vulcanization, and solves the problems of easy wear, chip drop and heavy odor of the floor pad of the cab.

Inventors

  • WANG SHAOCHENG
  • CHEN YONGLAI
  • ZHAO HAITAO
  • XU MENGHAO
  • YIN DEGUO
  • HAN WENTAO
  • GUO NING

Assignees

  • 日照东阳贝特机械技术有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (10)

  1. 1. The floor mat for the wear-resistant cab is characterized by being prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer rubber; 20-30 parts of metallocene polyolefin elastomer; 25-35 parts of modified ultra-high molecular weight polyethylene powder; 40-50 parts of calcined kaolin; 3-4 parts of nano zinc oxide; 0.5-0.8 part of stearic acid; 0.5-0.8 part of anti-aging agent; 1.5-2.0 parts of cross-linking auxiliary agent; 2.0-2.5 parts of a first peroxide crosslinking agent; and 0.5-0.8 part of a second peroxide crosslinking agent.
  2. 2. The wear-resistant cab floor mat according to claim 1, wherein ethylene unit content of the ethylene propylene diene monomer rubber is 65% -70%; The metallocene polyolefin elastomer is an ethylene-octene copolymer, and the density is 0.860g/cm 3 -0.870g/cm 3 ; the first peroxide cross-linking agent is di-tert-butyl peroxyisopropyl benzene, and the second peroxide cross-linking agent is tert-butyl peroxy-2-ethylhexanoate.
  3. 3. The floor mat for a wear-resistant cab according to claim 1, wherein the modified ultra-high molecular weight polyethylene powder is prepared from the following components in parts by weight: 100 parts of ultra-high molecular weight polyethylene micro powder; 50-85 parts of reactive liquid polyolefin; 3-5 parts of vinyl trimethoxy silane.
  4. 4. A wear resistant cab floor mat according to claim 3 wherein said reactive liquid polyolefin is selected from the group consisting of liquid ethylene propylene diene monomer or high vinyl liquid polybutadiene.
  5. 5. A wear resistant cab floor mat according to claim 1, wherein said cross-linking aid is triallyl isocyanurate.
  6. 6. A method for preparing the floor mat for the wear-resistant cab, which is used for preparing the floor mat for the wear-resistant cab according to any one of claims 1 to 5, and is characterized by comprising the following steps: (1) Pre-mixing ethylene propylene diene monomer rubber and a metallocene polyolefin elastomer in an internal mixer to obtain a pre-mixed sizing material; (2) Adding modified ultra-high molecular weight polyethylene powder, nano zinc oxide, stearic acid and an anti-aging agent into the premix compound for mixing, then adding calcined kaolin, mixing to a specified temperature, and discharging the compound to obtain a mixed compound; (3) Transferring the mixed rubber material to an open mill, adding a crosslinking auxiliary agent, a first peroxide crosslinking agent and a second peroxide crosslinking agent, and obtaining a rubber sheet to be vulcanized after thin-pass and sheet-feeding; (4) Carrying out first-stage vulcanization on a film to be vulcanized in a first plate vulcanizing machine, so that the ultra-high molecular weight polyethylene grain interface is pre-crosslinked and locked to obtain a shaping semi-finished product; (5) Transferring the shaped semi-finished product into a second plate vulcanizing machine for second-stage vulcanization, and deeply vulcanizing the film substrate to obtain the floor pad for the wear-resistant cab.
  7. 7. The method of manufacturing a floor mat for a wear-resistant cab according to claim 6, wherein the processes in step (1) and step (2) are controlled as follows: In the step (1), the preheating temperature of the cavity of the internal mixer is 85-95 ℃, and the mixing time is 50-70 seconds; In the step (2), the calcined kaolin is added in two equal amounts, and the glue discharging temperature is controlled to be 112-118 ℃.
  8. 8. The method of claim 6, wherein in the step (4), the first stage vulcanization is performed at a temperature of 120-130 ℃, a pressure of 14-16 MPa, and a time of 120-180 seconds.
  9. 9. The method for producing floor mat for wear-resistant cab according to claim 6, wherein in the step (5), the conditions of the second stage vulcanization are that the temperature is 165 ℃ to 175 ℃, the pressure is 14MPa to 16MPa, and the time is 480 seconds to 600 seconds, and the transfer time from the opening of the die in the step (4) to the closing and pressing of the die in the step (5) is controlled within 25 seconds.
  10. 10. The method for producing a floor mat for a wear-resistant cab according to claim 6, wherein in the step (2), the modified ultra-high molecular weight polyethylene powder is prepared in advance by: s1, stirring ultra-high molecular weight polyethylene micro powder at a high speed under the heating condition of 80-85 ℃ to obtain preheated powder; S2, uniformly mixing the reactive liquid polyolefin and vinyl trimethoxy silane at 50-60 ℃ to obtain a homogeneous phase modified liquid; And S3, increasing the stirring rotation speed, atomizing and spraying the homogeneous phase modified liquid into the preheated powder, continuously maintaining stirring after spraying, and cooling to obtain the modified liquid.

Description

Wear-resistant floor mat for cab and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a floor mat for a wear-resistant cab and a preparation method thereof. Background The cab floor pad is a key interior decoration part paved at the bottom of a vehicle cab and is mainly used for covering a metal bottom plate of a vehicle body, plays roles of sound insulation, noise reduction, shock absorption, buffering and anti-skid protection, and the performance of the cab floor pad directly influences the safety of driving operation and the comfort of indoor environment. In the prior art, the cab floor mat generally adopts natural rubber, styrene-butadiene rubber or ethylene propylene diene monomer rubber as a matrix material. In the manufacturing process, a sulfur vulcanization system is generally adopted for crosslinking, and carbon black or a conventional inorganic filler is added to improve the physical and mechanical strength of the material, so that the basic use requirement is met. However, the above prior art has significant drawbacks in practical applications. Firstly, the heel contact area of a driver bears high-frequency friction and shearing force for a long time, the abrasion resistance of a common rubber matrix is insufficient, local abrasion scraps and even perforation are easy to cause, if the abrasion resistance is enhanced simply by improving the hardness of the matrix, the friction coefficient of the surface of a floor mat is reduced, the anti-skid performance is poor, and the abrasion resistance and the anti-skid performance are difficult to be compatible. Secondly, part of the technology attempts to introduce wear-resistant particles such as ultra-high molecular weight polyethylene, but the surface of the wear-resistant particles is high in chemical inertness, so that the bonding force between the wear-resistant particles and a rubber matrix interface is weak, and the particles are easy to peel off in the use process. In addition, the traditional sulfur vulcanization system can release volatile organic compounds such as sulfides and the like in the production and use processes, so that the odor of the product is large, and the environmental protection requirement of the modern closed cab on the air quality is difficult to meet. Therefore, the invention provides a wear-resistant floor mat for a cab and a preparation method thereof, which solve the defects in the prior art. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a wear-resistant floor mat for a cab and a preparation method thereof, and solves the problems that the wear resistance and the skid resistance of the conventional rubber floor mat are difficult to be compatible, the interface binding force of wear-resistant particles is weak, the wear-resistant particles are easy to fall off and the smell of products is large. In order to achieve the above purpose, the invention is realized by the following technical scheme: In a first aspect, the invention provides a wear-resistant floor mat for a cab, which adopts the following technical scheme The floor mat for the wear-resistant cab is prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 20-30 parts of metallocene polyolefin elastomer, 25-35 parts of modified ultra-high molecular weight polyethylene powder, 40-50 parts of calcined kaolin, 3-4 parts of nano zinc oxide, 0.5-0.8 part of stearic acid, 0.5-0.8 part of anti-aging agent, 1.5-2.0 parts of crosslinking auxiliary agent, 2.0-2.5 parts of first peroxide crosslinking agent and 0.5-0.8 part of second peroxide crosslinking agent. By adopting the technical scheme, the invention uses ethylene propylene diene monomer as a continuous phase matrix, metallocene polyolefin elastomer as a toughening phase and modified ultra-high molecular weight polyethylene powder as an abrasion-resistant disperse phase. The ethylene propylene diene monomer rubber provides weather resistance and basic elasticity, and the metallocene polyolefin elastomer improves the processing fluidity of the rubber material and improves the low-temperature toughness. The modified ultra-high molecular weight polyethylene powder dispersed in the matrix takes advantage of the low friction coefficient and high wear resistance of the modified ultra-high molecular weight polyethylene powder, bears main external friction load and reduces the abrasion of the matrix. The calcined kaolin is used as a reinforcing filler, the stretching stress of the rubber is improved, and the adsorbed water and organic impurities are reduced and the odor source is reduced through calcination treatment. The peroxide crosslinking system is adopted to replace the traditional sulfur vulcanization system, so that the peculiar smell generated by decomposing thioether bonds is avoided, and the requirements of low-odor and low-volatility organ