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A kind of foam sole with low compression deformation and preparation method thereof
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A low-compression, low-temperature foaming agent technology, applied to shoe soles, footwear, clothing, etc., to achieve the effects of good elasticity, good mechanical properties, and low compression deformation
Active Publication Date: 2019-01-04
MAOTAI FUJIAN SOLES CO LTD
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[0003] The object of the present invention is to provide a foamed shoe sole with low compression deformation and a preparation method thereof in view of the deficiencies in the prior art. The compression deformation is less than 20% in the case of 6 hours, and the dynamic compression deformation is less than 7% in the case of 266 minutes of simulated low-speed running state test and 72,000 times of trampling, which is an ideal material for middle and low-speed running soles; the low compression deformation The preparation method of the foamed sole has a simple process and is easy to realize, and is suitable for mass production and use
Method used
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Embodiment 1
[0050] A preparation method of a foamed shoe sole with low compression deformation, comprising the steps of:
[0051] Step 1: Prepare the elastomer material, premix 3-5 minutes in a high-speed mixer with 75 parts of thermoplastic polyurethane C70 A HPM and 25 parts of EVA 7470M by weight, then pass the premixed material through a twin-screw extruder, Melt extrusion at 115°C, cooling and granulation to obtain elastomeric materials;
[0052] Step 2: Prepare EVA material rice, and described EVA material rice is prepared from the raw materials of the following components by weight:
[0068] A kind of preparation method of the foam sole of low compression set in embodiment 2 is identical with the preparation method in embodiment 1, difference is:
[0070] In step 2, 16 parts of EVA E220F, 15 parts of OBC 9077, and 6 parts of neoprene rubber.
[0071] The low compression deformation foam sole prepared above has a density of 0.23g / cm 3 , hardness 56, rebound rate 53%, tear strength 11.3 N / mm, compression deformation 19%, dynamic compression deformation 6.5%.
Embodiment 3
[0073] A kind of preparation method of the foam sole of low compression set in embodiment 3 is identical with the preparation method in embodiment 1, difference is:
[0075] In step 2, 9 parts of EVA 7470M (replacing EVA E220F), 20 parts of OBC 9077, 1.4 parts of low-temperature AC foaming agent, and 0.7 parts of crosslinking agent DCP;
[0076] In step 3, the foaming temperature is 160°C.
[0077] The low compression deformation foam sole prepared above, density 0.20g / cm 3 , hardness 55, rebound rate 54%, tear strength 10.7 N / mm, compression deformation 18%, dynamic compression deformation 5.0%.
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Abstract
The invention relates to the technical field of organic macromolecular compounds, and provides a low-compression deformation foamed sole and a preparation method thereof. The low-compression deformation foamed sole has the compression deformation being less than 20% under the conditions that the temperature is 50 DEG C, the compression ratio is 50% and the static compression time is 6 hours, and has the dynamic compression deformation being less than 7% under the conditions that the testing time is 266 minutes and the trampling times is 0.72 million during simulation of medium-speed and low-speed running states, so that the low-compression deformation foamed sole is an ideal sole material for medium-speed and low-speed running shoes; the low-compression deformation foamed sole is prepared from the following raw materials through secondary hydraulic moulding: EVA, an elastomeric material (consisting of thermoplasticpolyurethane and EVA 7470M), olefin block copolymer, chloroprene rubber, a low-temperature foaming agent, a crosslinking agent, zincoxide, stearic acid and talcum powder.
Description
technical field [0001] The invention belongs to the technical field of organic polymer compounds, and in particular relates to a foamed shoe sole with low compression deformation and a preparation method thereof. Background technique [0002] Due to the advantages of low density, good elasticity and good processing performance, EVA foam materials are widely used in the field of shoe materials, but there are also defects such as large material deformation and poor wear resistance, while thermoplasticpolyurethane has good mechanical properties and wear resistance. , low temperature flexibility and adhesiveness, just can form complementary advantages with EVA, especially suitable for shoe sole materials. Polyurethane is composed of hard segments and soft segments. There are many variable factors such as molecular chain length, monomer type, and the ratio of soft and hard segments. There are many grades of thermoplasticpolyurethane produced, and the hardness range is very wide...
Claims
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