CN108752971B - Regenerated TPE (thermoplastic elastomer) foam material and preparation method thereof - Google Patents
Regenerated TPE (thermoplastic elastomer) foam material and preparation method thereof Download PDFInfo
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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Abstract
The invention relates to the technical field of foaming, in particular to a regenerated TPE (thermoplastic elastomer) foaming material and a preparation method thereof. The product of the invention has low cost, stable performance, excellent shrinkage resistance, aging resistance and pressure resistance, has good elasticity and can withstand long-term use.
Description
Technical Field
The invention relates to the technical field of foaming, and particularly relates to a regenerated TPE (thermoplastic elastomer) foaming material and a preparation method thereof.
Background
The foamed plastic has the advantages of light weight, heat insulation, sound insulation, buffering, high specific strength and the like. Therefore, the composite material is widely applied to the fields of packaging, industry, agriculture, transportation, military industry, aerospace industry, daily necessities and the like. Thermoplastic elastomer (tpe) is a material with the characteristics of high elasticity, high strength, high resilience and injection processability of rubber. The environment-friendly, non-toxic and safe composite material has the advantages of environmental protection, no toxicity, wide hardness range, excellent colorability, soft touch, weather resistance, fatigue resistance, temperature resistance and excellent processing performance, does not need vulcanization, can be subjected to secondary injection molding, can be coated and adhered with matrix materials such as PP, PE, PC, PS, ABS and the like, and can also be independently molded.
In the industrial production process, the TPE foaming material generates a lot of waste leftover materials, which causes material waste, however, when the TPE foaming material is recycled, the performance of the obtained foaming material is not good.
Disclosure of Invention
The invention aims to provide a regenerated TPE (thermoplastic elastomer) foaming material with good foaming property and a preparation method thereof aiming at the defects in the prior art.
The purpose of the invention is realized by the following technical scheme: the regenerated TPE foaming material comprises 50-60% of recycled TPE foaming material, 10-20% of ethylene-vinyl acetate copolymer EVA and 12-20% of thermoplastic elastomer TPE. Ethylene vinyl acetate EVA and TPE are both commercially available. Preferably, the thermoplastic elastomer TPE is a styrenic TPE.
Preferably, the material comprises the following components in percentage by weight:
50-60% of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 10% -20%
12 to 20 percent of thermoplastic elastomer TPE
1 to 5 percent of calcium carbonate
2 to 5 percent of zinc stearate
2 to 5 percent of bridging agent
1 to 5 percent of foaming agent
2 to 8 percent of color master batch.
More preferably, the material comprises the following substances in percentage by weight:
50-60% of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 10% -20%
12 to 20 percent of thermoplastic elastomer TPE
1 to 5 percent of metallocene polyethylene
1 to 5 percent of calcium carbonate
2 to 5 percent of zinc stearate
2 to 5 percent of bridging agent
1 to 5 percent of foaming agent
2 to 8 percent of color master batch.
Preferably, the material comprises the following components in percentage by weight:
50-60% of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 10% -20%
12 to 20 percent of thermoplastic elastomer TPE
1 to 5 percent of metallocene polyethylene
0.01 to 0.1 percent of graphene oxide
1 to 5 percent of calcium carbonate
2 to 5 percent of zinc stearate
2 to 5 percent of bridging agent
1 to 5 percent of foaming agent
2 to 8 percent of color master batch.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer TPE;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
Preferably, the melt index MI of the ethylene-vinyl acetate copolymer is 3-8g/10min, and the mass content of vinyl acetate is 18-28%.
The total weight percentage of all the raw materials of the invention is 100%.
The invention has the beneficial effects that: the invention selects the recycled TPE foaming material as a main body, and then mixes the recycled TPE foaming material with ethylene-vinyl acetate copolymer, thermoplastic elastomer TPE and other auxiliary agents to prepare the composite material through mixing and foaming. The product of the invention has low cost, stable performance, excellent shrinkage resistance, aging resistance and pressure resistance, has good elasticity, can stand long-term use, and can be used for shoe materials or cushions.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
The regenerated TPE foaming material comprises the following substances in percentage by weight:
60 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 10%
Thermoplastic elastomer TPE 12%
2 percent of calcium carbonate
3 percent of zinc stearate
3 percent of bridging agent
Foaming agent 5%
5% of color master batch.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer TPE;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
Example 2
The regenerated TPE foaming material comprises the following substances in percentage by weight:
55 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 15%
Thermoplastic elastomer TPE 12%
2 percent of calcium carbonate
4 percent of zinc stearate
2 percent of bridging agent
2 percent of foaming agent
8 percent of color master batch.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer and the thermoplastic elastomer TPE;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
Example 3
The regenerated TPE foaming material comprises the following substances in percentage by weight:
50 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 18%
Thermoplastic elastomer TPE 12%
Metallocene polyethylene 5%
Calcium carbonate 5%
2 percent of zinc stearate
2 percent of bridging agent
Foaming agent 4%
2 percent of color master batch.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer, the thermoplastic elastomer TPE and the metallocene polyethylene;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
In the first step, after grinding the recycled TPE foaming material into powder, carrying out the following treatment: 100 parts by weight of powdery recovered TPE foaming material is prepared into suspension, 0.5 part by weight of potassium hydroxide powder is added, the suspension is heated to 90 ℃ under the stirring state, 0.06 part by weight of lauric acid and 0.03 part by weight of ethylene glycol monobutyl ether are added, the stirring is continued for 4 hours, 0.03 part by weight of methyl triethoxysilane and 0.03 part by weight of isooctyl bis-n-octyl tin bis-thioglycolate are added after the temperature reduction, the filtration, the washing and the drying, and the suspension is used after the grinding.
Example 4
The regenerated TPE foaming material comprises the following substances in percentage by weight:
60 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 10%
Thermoplastic elastomer TPE 15%
2% of metallocene polyethylene
3 percent of calcium carbonate
2 percent of zinc stearate
3 percent of bridging agent
Foaming agent 3%
2 percent of color master batch.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer, the thermoplastic elastomer TPE and the metallocene polyethylene;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
In the first step, after grinding the recycled TPE foaming material into powder, carrying out the following treatment: 100 parts by weight of powdery recycled TPE foaming material is prepared into suspension, 0.1 part by weight of potassium hydroxide powder is added, the suspension is heated to 75 ℃ under the stirring state, 0.02 part by weight of lauric acid and 0.01 part by weight of ethylene glycol monobutyl ether are added, the stirring is continued for 2 hours, 0.01 part by weight of methyl triethoxysilane and 0.01 part by weight of isooctyl bis-n-octyl tin bis-thioglycolate are added after the temperature reduction, the filtration, the washing and the drying, and the suspension is used after the grinding.
Example 5
The regenerated TPE foaming material comprises the following substances in percentage by weight:
52 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 16%
13.95 percent of thermoplastic elastomer TPE
0.05 percent of graphene oxide
Metallocene polyethylene 4%
Calcium carbonate 4%
2 percent of zinc stearate
2 percent of bridging agent
Foaming agent 3%
3 percent of color master batch.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
The graphene oxide is subjected to the following treatment before use: uniformly mixing 10 parts by weight of graphene oxide and 1 part by weight of N-octadecyl diethanolamine in 1000ml of acetone, stirring for 24-48h at 40-50 ℃, and then centrifuging, washing and drying to obtain the modified graphene oxide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer, the thermoplastic elastomer TPE and the metallocene polyethylene;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
In the first step, after grinding the recycled TPE foaming material into powder, carrying out the following treatment: 100 parts by weight of powdery recovered TPE foaming material is prepared into suspension, 0.5 part by weight of potassium hydroxide powder is added, the suspension is heated to 90 ℃ under the stirring state, 0.06 part by weight of lauric acid and 0.03 part by weight of ethylene glycol monobutyl ether are added, the stirring is continued for 4 hours, 0.03 part by weight of methyl triethoxysilane and 0.03 part by weight of isooctyl bis-n-octyl tin bis-thioglycolate are added after the temperature reduction, the filtration, the washing and the drying, and the suspension is used after the grinding.
Example 6
The regenerated TPE foaming material comprises the following substances in percentage by weight:
57 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 12%
Thermoplastic elastomer TPE 17.9%
2% of metallocene polyethylene
0.1 percent of graphene oxide
1 percent of nano silicon dioxide
1 percent of calcium carbonate
2 percent of zinc stearate
4 percent of bridging agent
1 percent of foaming agent
2 percent of color master batch.
This example adds nanosilica.
The weight content of TPE in the recycled TPE foaming material is more than 50%.
The bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide.
The graphene oxide is subjected to the following treatment before use: uniformly mixing 10 parts by weight of graphene oxide and 1 part by weight of N-octadecyl diethanolamine in 1000ml of acetone, stirring for 24-48h at 40-50 ℃, and then centrifuging, washing and drying to obtain the modified graphene oxide.
A preparation method of a regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer, the thermoplastic elastomer TPE and the metallocene polyethylene; step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming.
In the first step, after grinding the recycled TPE foaming material into powder, carrying out the following treatment: 100 parts by weight of powdery recycled TPE foaming material is prepared into suspension, 0.1 part by weight of potassium hydroxide powder is added, the suspension is heated to 75 ℃ under the stirring state, 0.02 part by weight of lauric acid and 0.01 part by weight of ethylene glycol monobutyl ether are added, the stirring is continued for 2 hours, 0.01 part by weight of methyl triethoxysilane and 0.01 part by weight of isooctyl bis-n-octyl tin bis-thioglycolate are added after the temperature reduction, the filtration, the washing and the drying, and the suspension is used after the grinding.
The melt index MI of the ethylene-vinyl acetate copolymer used in the invention is 3-8g/10min, and the mass content of vinyl acetate is 18-28%.
The recycled TPE foams of examples 1-6 were tested for properties as shown in the following table:
the above data show that the regenerated TPE foamed material of the invention has excellent mechanical properties, which indicates that the invention not only can effectively reduce the cost, but also can obtain products with excellent properties.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (2)
1. A regenerated TPE foaming material is characterized in that: the material consists of the following substances in percentage by weight:
50 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 18%
Thermoplastic elastomer TPE 12%
Metallocene polyethylene 5%
Calcium carbonate 5%
2 percent of zinc stearate
2 percent of bridging agent
Foaming agent 4%
2 percent of color master batch,
the weight content of TPE in the recycled TPE foaming material is more than 50%;
the bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide;
the preparation method of the regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer, the thermoplastic elastomer TPE and the metallocene polyethylene;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming,
in the first step, the recycled TPE foaming material is ground into powder and then treated as follows: 100 parts by weight of powdery recovered TPE foaming material is prepared into suspension, 0.5 part by weight of potassium hydroxide powder is added, the suspension is heated to 90 ℃ under the stirring state, 0.06 part by weight of lauric acid and 0.03 part by weight of ethylene glycol monobutyl ether are added, the stirring is continued for 4 hours, 0.03 part by weight of methyl triethoxysilane and 0.03 part by weight of isooctyl bis-n-octyl tin bis-thioglycolate are added after the temperature reduction, the filtration, the washing and the drying, and the suspension is used after the grinding.
2. A regenerated TPE foaming material is characterized in that: the material consists of the following substances in percentage by weight:
60 percent of recycled TPE foaming material
Ethylene-vinyl acetate copolymer EVA 10%
Thermoplastic elastomer TPE 15%
2% of metallocene polyethylene
3 percent of calcium carbonate
2 percent of zinc stearate
3 percent of bridging agent
Foaming agent 3%
2 percent of color master batch,
the weight content of TPE in the recycled TPE foaming material is more than 50%;
the bridging agent is 1, 4-di-tert-butyl peroxy isopropyl benzene, and the foaming agent is azodicarbonamide;
the preparation method of the regenerated TPE foaming material comprises the following steps:
the method comprises the following steps: grinding the recycled TPE foaming material into powder to obtain recycled TPE foaming powder;
step two: mixing the recycled TPE foaming powder, the ethylene-vinyl acetate copolymer, the thermoplastic elastomer TPE and the metallocene polyethylene;
step three: then adding calcium carbonate, zinc stearate, bridging agent, foaming agent and color master batch, continuously mixing and foaming,
in the first step, the recycled TPE foaming material is ground into powder and then treated as follows: 100 parts by weight of powdery recycled TPE foaming material is prepared into suspension, 0.1 part by weight of potassium hydroxide powder is added, the suspension is heated to 75 ℃ under the stirring state, 0.02 part by weight of lauric acid and 0.01 part by weight of ethylene glycol monobutyl ether are added, the stirring is continued for 2 hours, 0.01 part by weight of methyl triethoxysilane and 0.01 part by weight of isooctyl bis-n-octyl tin bis-thioglycolate are added after the temperature reduction, the filtration, the washing and the drying, and the suspension is used after the grinding.
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|---|---|---|---|---|
| CN101735497A (en) * | 2009-12-09 | 2010-06-16 | 浙江仕峰实业有限公司 | Physical foaming ethane-butadiene rubber composite capable of being injected and crosslinked, as well as preparation method, product and processing method thereof |
| CN102382406A (en) * | 2011-11-23 | 2012-03-21 | 郑州大学 | Polyvinyl butyral foamed material |
| CN102532675A (en) * | 2011-12-16 | 2012-07-04 | 蔡龙源 | Foaming material for shoes |
| CN102660129A (en) * | 2012-05-28 | 2012-09-12 | 安踏（中国）有限公司 | EVA (ethylene-vinyl acetate copolymer) foamed composite and preparation method thereof |
| CN105001506A (en) * | 2015-07-09 | 2015-10-28 | 福建豪威节能科技发展有限公司 | Ternary rubber synthetic cross-linked polymer containing foamed EVA |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101735497A (en) * | 2009-12-09 | 2010-06-16 | 浙江仕峰实业有限公司 | Physical foaming ethane-butadiene rubber composite capable of being injected and crosslinked, as well as preparation method, product and processing method thereof |
| CN102382406A (en) * | 2011-11-23 | 2012-03-21 | 郑州大学 | Polyvinyl butyral foamed material |
| CN102532675A (en) * | 2011-12-16 | 2012-07-04 | 蔡龙源 | Foaming material for shoes |
| CN102660129A (en) * | 2012-05-28 | 2012-09-12 | 安踏（中国）有限公司 | EVA (ethylene-vinyl acetate copolymer) foamed composite and preparation method thereof |
| CN105001506A (en) * | 2015-07-09 | 2015-10-28 | 福建豪威节能科技发展有限公司 | Ternary rubber synthetic cross-linked polymer containing foamed EVA |
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