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CN-122011616-A - Tear-resistant degradable foam pad and preparation method thereof

CN122011616ACN 122011616 ACN122011616 ACN 122011616ACN-122011616-A

Abstract

The invention discloses a tearing-resistant degradable foam pad and a preparation method thereof, and belongs to the technical field of high polymer materials, wherein the tearing-resistant degradable foam pad comprises, by weight, 50-60 parts of PVC resin, 30-40 parts of plant fiber, 10-15 parts of liquid nitrile rubber, 65-78 parts of filler, 72-90 parts of plasticizer, 5-7 parts of foaming agent and 2-4 parts of stabilizer; the filler is a mixture of montmorillonite and light calcium carbonate. According to the invention, the mixture of montmorillonite and light calcium carbonate is used as the filler, and the characteristic that the montmorillonite can block crack extension in the foaming pad matrix is utilized, so that more energy is required to be consumed for crack extension in the foaming pad matrix, and the tearing strength of the foaming pad can be improved, so that the foaming pad can meet the tearing strength requirements of high-end yoga pads and exercise pads.

Inventors

  • XIA GUANMING
  • LI WEIJIAN

Assignees

  • 广东远华新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20251231

Claims (10)

  1. 1. The tear-resistant degradable foam pad is characterized by comprising, by weight, 50-60 parts of PVC resin, 30-40 parts of plant fibers, 10-15 parts of liquid nitrile rubber, 65-78 parts of filler, 72-90 parts of plasticizer, 5-7 parts of foaming agent and 2-4 parts of stabilizer, wherein the filler is a mixture of montmorillonite and light calcium carbonate.
  2. 2. The tear-resistant degradable foam pad of claim 1, wherein the montmorillonite has a particle size of 1-5 um and a lamellar thickness of 1-5 nm.
  3. 3. The tearing-resistant degradable foam pad of claim 1, wherein the weight ratio of the light calcium carbonate to the montmorillonite is (12-14) 1.
  4. 4. The tear resistant degradable foam pad of claim 1 wherein the plasticizer is a mixture of epoxidized soybean oil, dioctyl terephthalate, citrate.
  5. 5. The tear-resistant degradable foam pad of claim 4, wherein the epoxy soybean oil, dioctyl terephthalate and citric acid ester are mixed according to the weight ratio of (1-1.5): 2 (3-4).
  6. 6. The tearing-resistant degradable foam pad of claim 4, wherein the citrate is a mixture of tributyl citrate and acetyl tributyl citrate, and the weight ratio of the tributyl citrate to the acetyl tributyl citrate is 1 (1-1.5).
  7. 7. The tear resistant degradable foam pad of claim 1, wherein the stabilizer is a zinc potassium stabilizer.
  8. 8. The tear resistant degradable foam pad of claim 1, wherein the foaming agent is an AC foaming agent.
  9. 9. A method for preparing the tear-resistant degradable foam pad, which is used for preparing the tear-resistant degradable foam pad according to any one of claims 1 to 8, and is characterized by comprising the following steps: S001, weighing raw materials for preparing the tearing-resistant degradable foam pad according to a proportion; s002, uniformly stirring and mixing the liquid nitrile rubber and the plant fiber, then adding the PVC resin, the plasticizer, the filler, the foaming agent and the stabilizer, and uniformly stirring and mixing to obtain foaming slurry; S003, coating the foaming slurry on the mesh cloth, and foaming to obtain the tearing-resistant degradable foaming pad.
  10. 10. The method of claim 9, wherein in step S003, the foaming temperature is 185-195 ℃.

Description

Tear-resistant degradable foam pad and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a tearing-resistant degradable foam pad and a preparation method thereof. Background PVC foam pad is widely applied to yoga pad, sports cushion pad, bathroom slipmat etc. fields by virtue of the outstanding advantages of low cost and excellent elasticity. However, the PVC resin itself does not have the biodegradability, so that the PVC foam pad is difficult to realize high-efficiency recycling through a conventional mode after waste gas is exhausted, and a large number of piled waste products are extremely easy to cause sustainable negative effects on ecological environments such as soil, water body and the like. In order to solve the pain point, the prior art generally adopts a technical means of introducing degradable components such as plant fibers and the like into a raw material system of the PVC foaming pad so as to reduce the adverse effect of the foaming pad on the environment. However, the PVC resin always has a problem of compatibility with the plant fiber, so that the mechanical strength of the degradable foam pad is always difficult to achieve when the plant fiber replaces part of the PVC resin. Although the prior art can improve the mechanical strength, in particular the tearing strength (36N/cm can be achieved) of the pad body by introducing the liquid nitrile rubber into the raw material system of the PVC foam pad, the tearing strength is difficult to meet the tearing strength requirements of the high-end yoga pad and the exercise pad. Disclosure of Invention The invention aims to provide a tearing-resistant degradable foam pad and a preparation method thereof, and aims to solve the problem that the existing degradable PVC foam pad is limited in degree of improving tearing strength. The invention provides a tearing-resistant degradable foam pad, which is prepared from, by weight, 50-60 parts of PVC resin, 30-40 parts of plant fibers, 10-15 parts of liquid nitrile rubber, 65-78 parts of filler, 72-90 parts of plasticizer, 5-7 parts of foaming agent and 2-4 parts of stabilizer, wherein the filler is a mixture of montmorillonite and light calcium carbonate. Optionally, the grain diameter of the montmorillonite is 1-5 um, and the lamellar thickness of the montmorillonite is 1-5 nm. Optionally, the weight ratio of the light calcium carbonate to the montmorillonite is (12-14) 1. Optionally, the plasticizer is a mixture of epoxidized soybean oil, dioctyl terephthalate and citric acid ester. Optionally, the weight ratio of the epoxidized soybean oil to the dioctyl terephthalate to the citric acid ester is (1-1.5) 2 (3-4). Optionally, the citrate is a mixture of tributyl citrate and acetyl tributyl citrate, and the weight ratio of the tributyl citrate to the acetyl tributyl citrate is 1 (1-1.5). Optionally, the stabilizer is a zinc potassium stabilizer. Optionally, the foaming agent is an AC foaming agent. The second aspect of the present invention provides a method for preparing a tear-resistant degradable foam pad, for preparing the tear-resistant degradable foam pad described above, comprising the steps of: S001, weighing raw materials for preparing the tearing-resistant degradable foam pad according to a proportion; s002, uniformly stirring and mixing the liquid nitrile rubber and the plant fiber, then adding the PVC resin, the plasticizer, the filler, the foaming agent and the stabilizer, and uniformly stirring and mixing to obtain foaming slurry; S003, coating the foaming slurry on the mesh cloth, and foaming to obtain the tearing-resistant degradable foaming pad. Optionally, the foaming temperature is 185-195 ℃. The beneficial effects of the invention are as follows: According to the invention, the mixture of montmorillonite and light calcium carbonate is used as a filler, and the characteristic that the montmorillonite can block crack extension in a foaming pad matrix is utilized, so that more energy is required to be consumed for crack extension in the foaming pad matrix, the tearing strength of the foaming pad can be improved, and the foaming pad can meet the tearing strength requirements of high-end yoga pads and sports pads. The invention provides a preparation method of a tearing-resistant degradable foam pad, which is simple and efficient, and can completely reduce the foaming temperature to below 200 ℃ by optimizing the types and the proportions of plasticizers, further improve the carbonization condition of plant fibers and solve the yellowing problem of the foam pad caused by fluctuation of production temperature. Drawings FIG. 1 is a flow chart of a method of making a tear resistant degradable foam pad provided by the present invention. FIG. 2 is a photograph of a yoga mat product incorporating the foam mat provided by the present invention Detailed Description The following description of the embodiments of the pre