Between-closed-pore-and-open-pore EVA (Ethylene-Vinyl Acetate copolymer) foamed shoe material and manufacturing method thereof
A manufacturing method and closed-cell technology, applied in footwear, shoe soles, footwear, etc., can solve the problems of easy shrinkage of EVA foam shoe materials and no related reports, and achieve enhanced impact resistance, excellent physical properties, and overcoming Thick and wrinkled skin
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[0045] Example 1:
[0046] 1. The composition of raw materials by mass percentage is as follows:
[0047] Ethylene-vinyl acetate copolymer EVA7470M: 45%;
[0048] Ethylene-vinyl acetate copolymer EVA7350M: 25%;
[0049] Ethylene-octene copolymer POE8150: 15%;
[0050] EPDM3745P: 6%;
[0051] Stearic acid: 0.4%;
[0052] Zinc stearate: 1%;
[0053] Zinc oxide: 1%;
[0054] Dicumyl peroxide: 0.6%;
[0055] Mixed blowing agent: 3%;
[0056] Color masterbatch: 3%.
[0057] 2. The manufacturing method of the EVA foamed shoe material between the open cells and the closed cells includes the following steps:
[0058] 1) Pound material
[0059] Weigh the raw materials according to the designed formula, weigh the dicumyl peroxide and the mixed foaming agent separately, mix the two together, and mix the rest together;
[0060] 2) Tantra
[0061] Pour the prepared raw materials into a 75L internal mixer except for dicumyl peroxide and foaming agent, start the internal mixing and mixing to make the materials e...
Example Embodiment
[0074] Example 2: Adjust the dosage of EVA7470M, EVA7350M, and POE8150 on the basis of Example 1. The raw material formula is as follows:
[0075] Ethylene-vinyl acetate copolymer EVA7470M: 53%;
[0076] Ethylene-vinyl acetate copolymer EVA7350M: 22%;
[0077] Ethylene-octene copolymer POE8150: 10%;
[0078] EPDM3745P: 6%;
[0079] Stearic acid: 0.4%;
[0080] Zinc stearate: 1%;
[0081] Zinc oxide: 1%;
[0082] Dicumyl peroxide: 0.6%;
[0083] Mixed blowing agent: 3%;
[0084] Color masterbatch: 3%.
Example Embodiment
[0085] Example 3: On the basis of Example 2, continue to adjust the dosage of EVA7470M, EVA7350M, POE8150, and EPDM3745P to control them within the set dosage range. The raw material formula is as follows;
[0086] Ethylene-vinyl acetate copolymer EVA7470M: 50%;
[0087] Ethylene-vinyl acetate copolymer EVA7350M: 25%;
[0088] Ethylene-octene copolymer POE8150: 11%;
[0089] EPDM3745P: 5%;
[0090] Stearic acid: 0.4%;
[0091] Zinc stearate: 1%;
[0092] Zinc oxide: 1%;
[0093] Dicumyl peroxide: 0.6%;
[0094] Mixed blowing agent: 3%;
[0095] Color masterbatch: 3%.
[0096] In order to better illustrate the results of the study, the formulation does not use the mixed foaming agent in the use of the foaming agent. Comparative example 1 is based on the example 1 to change the mixed foaming agent to azo foaming agent (AC ), Comparative Example 2 is based on Example 2 to change the mixed foaming agent to open-cell foaming agent (H), Comparative Example 1 (damping performance decreased, elastic...
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