阅读说明：本技术 一种轻质高回弹sebs发泡鞋底的制备方法 (Preparation method of light high-resilience SEBS foamed sole ) 是由 罗水源 胡旭 陈继锡 朱志国 朱君秋 于 2019-12-16 设计创作，主要内容包括：本发明公开了一种轻质高回弹SEBS发泡鞋底的配方,由以下质量份的原料组成：聚苯乙烯-乙烯-丁二烯-苯乙烯(SEBS)60~85份,异戊二烯橡胶(IR)10~20份,乙烯-醋酸乙烯共聚物(EVA)5~15份,滑石粉3~10份,硬脂酸辛(ZnST)0.3~1份,硬脂酸(STE)0.3~1份,氧化锌(ZnO)0.5~2份,交联剂双叔丁基过氧异丙基苯(BIPB)0.1~0.5份,发泡剂偶氮二甲酰胺(AC)2~4份。本发明的轻质高回弹鞋底具有抗老化性能好、质轻、回弹高、舒适感强等优点,可作为拖鞋、凉鞋、休闲鞋、旅游鞋、运动鞋等的大底、中底或整体式鞋底,可以被广泛推广。(The invention discloses a formula of a light high-resilience SEBS foamed sole, which is prepared from the following raw materials in parts by mass: 60-85 parts of polystyrene-ethylene-butadiene-styrene (SEBS), 10-20 parts of Isoprene Rubber (IR), 5-15 parts of ethylene-vinyl acetate copolymer (EVA), 3-10 parts of talcum powder, 0.3-1 part of octyl stearate (ZnST), 0.3-1 part of stearic acid (STE), 0.5-2 parts of zinc oxide (ZnO), 0.1-0.5 part of cross-linking agent bis-tert-butylperoxyisopropyl benzene (BIPB), and 2-4 parts of foaming agent Azodicarbonamide (AC). The light high-resilience sole has the advantages of good ageing resistance, light weight, high resilience, strong comfort and the like, can be used as an outsole, a midsole or an integral sole of slippers, sandals, casual shoes, tourist shoes, sports shoes and the like, and can be widely popularized.)

1. The light high-resilience SEBS foamed sole is characterized by comprising the following components in parts by mass: 60-85 parts of polystyrene-ethylene-butadiene-styrene block copolymer, 10-20 parts of isoprene rubber, 5-15 parts of ethylene-vinyl acetate copolymer, 3-10 parts of talcum powder, 0.3-1 part of stearyl acid, 0.3-1 part of stearic acid, 0.5-2 parts of zinc oxide, 0.1-0.5 part of crosslinking agent bis (tert-butylperoxyisopropyl) benzene and 2-4 parts of foaming agent azodicarbonamide.

2. The light high-resilience SEBS foamed sole according to claim 1, wherein the hydrogenation degree of the polystyrene-ethylene-butadiene-styrene block copolymer is 80-90%, and the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 18-30%; the fineness of the talcum powder is 400-800 meshes; the stearic acid octyl is used as a foaming auxiliary agent, and the content of metal zinc is 10.3% -11.3%; the stearic acid is a main vulcanization promoting auxiliary agent and has the fineness of 200-400 meshes; the theoretical active oxygen content of the crosslinking agent bis-tert-butylperoxyisopropyl benzene is 5-10%; the foaming agent azodicarbonamide has the gas evolution of 200-300 ml/g.

3. A preparation method of the lightweight high-resilience SEBS foamed shoe sole as claimed in claim 1 or 2, characterized by comprising the following steps:

(1) weighing the isoprene rubber, the ethylene-vinyl acetate copolymer, the polystyrene-ethylene-butadiene-styrene, the talcum powder, the zinc oxide, the stearic acid, the cross-linking agent of the di-tert-butylperoxyisopropyl benzene and the foaming agent of azodicarbonamide in parts by mass, adding the materials into a small double-roller open mill, fully mixing for 13-18 min at the temperature of 90-105 ℃ and the double-roller distance of 1-2 mm, repeatedly beating a triangular bag for 5-9 times in the process, adjusting the double-roller distance to 2-4 mm, and pulling the sheet for later use;

(2) weighing 125-145 g of the test piece obtained in the step (1), putting the test piece into a mold preheated in advance in a flat vulcanizing machine, and carrying out mold pressing foaming at the temperature of 160-175 ℃, wherein the foaming time is 9-12 min, and the mold pressing is 8-15 MPa, so as to obtain the light high-resilience sole sheet.

4. The preparation method according to claim 3, wherein the temperature rise rate of the open mill in the step (1) is 3-7 ℃/min.

5. The manufacturing method according to claim 3, wherein the thickness of the pull tab in the step (1) is 1.5 to 5 mm.

6. The preparation method according to claim 3, wherein the thickness of the light high resilience sole sheet in the step (2) is 12-18 mm.

7. The application of the light high-resilience SEBS foamed sole as claimed in any one of claims 1 to 6, wherein the light high-resilience sole is used as an outsole, a midsole or an integral sole of a slipper, a sandal, a leisure shoe, a tourist shoe or a sports shoe.

Technical Field

The invention mainly relates to the technical field of foamed sole processing, and particularly relates to a preparation method of a light high-resilience SEBS foamed sole.

Background

China is the first major country of global shoemaking and export, 3 thousands of shoe enterprises exist, and annual shoes yield is 100 hundred million pairs, which accounts for about 70% of the total global shoemaking. In recent years, with the development of national economy and improvement of living standard of China, the requirements of vast consumers on shoes are higher and higher, and the safety and comfort of the shoes are better emphasized while the attractiveness and the bulkiness of the shoes are emphasized. However, the quality of the footwear is closely related to the performance of the sole material. Moreover, with the continuous progress and innovation of the production technology, the material types of the sole materials are more and more abundant, and the embodying degree of the specificity is stronger and stronger. Compared with the traditional solid sole material, the novel foaming sole material has the advantages of being free from the heavy feeling of the traditional sole, light, comfortable, excellent in physical property and low in production cost, and has considerable value in the development of the sole market. At present, in the research of light high-resilience sole materials, EVA is generally adopted as a main material, and the EVA is blended and foamed together with other polymer materials to reduce the density and improve the resilience. The SEBS is a thermoplastic elastomer prepared by hydrogenation of SBS unsaturated double bonds, has good stability and aging resistance, good rebound resilience and strong processability. The invention takes the SEBS prepared by hydrogenation of the unsaturated double bond of SBS as the main material of the sole to prepare the sole with light weight and high resilience, which can be used as the outsole, the insole or the integral sole of slippers, sandals, casual shoes, sneakers, sports shoes and the like.

The prior patent document CN 109401030A discloses a light wear-resistant EVA sole material and a preparation method thereof, wherein the material comprises the following components: EVA, polylactic acid, glass fiber, sodium bicarbonate, nano zinc oxide, magnesium stearate, light calcium carbonate, dioctyl phthalate and a tai-acid coupling agent are calculated by weight. The preparation method comprises the steps of ball milling, banburying, open milling, sheet discharging, die pressing and the like. The EVA sole material prepared by the method has good wear resistance and is light and convenient to wear, but the interface action between EVA and glass fiber is poor, the prepared foam material has general rebound resilience and low wearing comfort, and the EVA sole material is limited by a large range in use and cannot be widely applied.

The prior patent document CN 108586899 a discloses a preparation method of a light EVA foamed shoe material, which comprises the following steps: (1) banburying by an internal mixer, (2) granulating by an extruder, and foaming by an injection machine. In the preparation process, although the light EVA foaming shoe material prepared by the invention has small specific gravity and good integrity through the mixture ratio of the raw materials, the light EVA foaming shoe material has poor skid resistance, wear resistance and resilience performance and short service life, and also causes the use range of the sole to be limited, has no great use value and can not meet the requirements of markets and consumers.

The invention discloses a preparation method of a light wear-resistant rubber sole, and the light anti-skid wear-resistant rubber material for the sole is prepared from the following raw materials in parts by mass: natural rubber, phenolic resin, polyurethane resin, a silane coupling agent, bisphenol A diglycidyl ether, sulfur, modified nano silicon dioxide, graphene and nano titanium dioxide. The sole material prepared by the invention has general wear resistance, moderate specific gravity in a local range, and low impact resilience rate of the sole, so that the sole material has poor wearing comfort for consumers and poor cost performance, and needs to be further improved. Therefore, aiming at the technical problems and meeting the requirements of the market and consumers as much as possible, the invention discloses a light high-resilience shoe to effectively reduce the specific gravity of a sole, improve the resilience within the range of meeting the requirements of wear resistance, and have higher cost performance and good comfort.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a preparation method of a light high-resilience sole by using SEBS (styrene-ethylene-butadiene-styrene) prepared by hydrogenation of unsaturated double bonds of SBS as a main material to replace the main material of the conventional foaming sole material and solving the problems of heavy weight, low resilience, poor comfort degree and the like of the conventional foaming sole material.

In order to achieve the above object, the present invention adopts the following technical solutions

A light high-resilience SEBS foamed sole comprises the following components in parts by mass: 60-85 parts of polystyrene-ethylene-butadiene-styrene (SEBS Japan Asahi chemical JT-83) with a hydrogenation degree of 80-90%, 10-20 parts of isoprene rubber (IR Japan Rui Wen 2200), 5-15 parts of ethylene-vinyl acetate copolymer (EVA 7470 plastic industry), 3-10 parts of talcum powder, 0.3-1 part of stearic acid octyl (ZnST), 0.3-1 part of stearic acid (STE), 0.5-2 parts of zinc oxide (ZnO), 0.2-0.5 part of cross-linking agent bis (tert-butylperoxy isopropyl benzene) (BIPB) and 2-4 parts of foaming agent Azodicarbonamide (AC).

The SEBS is a commercial product of Asahi Kasei Co., Ltd, and is prepared by hydrogenating unsaturated double bonds of styrene-butadiene-styrene (SBS).

The Isoprene Rubber (IR) is a general synthetic rubber with good comprehensive performance and can replace natural rubber.

The content of vinyl acetate in the EVA is 18-30%.

The talcum powder is non-toxic, odorless and tasteless, and has excellent characteristics of anti-sticking, flow aiding, good covering power, strong adsorption power and the like. The fineness is 400 meshes to 800 meshes.

The ZnST is used as a foaming auxiliary agent, and the content of the metal zinc is 10.3-11.3%.

The STE and ZnO react to promote the activity of the STE and ZnO, and the STE and ZnO are also main vulcanization promoting auxiliaries with the fineness of 200-400 meshes.

The ZnO reduces the decomposition temperature of the foaming agent and enhances the activity of the vulcanization accelerator.

The theoretical active oxygen content of the crosslinking agent BIPB is 5% -10%.

The foaming agent has the AC decomposition temperature of 190-205 ℃ and the gas forming amount of 200-300 ml/g.

A preparation method of a light high-resilience SEBS foamed sole material comprises the following steps:

(1) weighing the IR, the EVA, the SEBS, the talcum powder, the ZnO, the ZnST, the STE, the crosslinking agent BIPB and the foaming agent AC in parts by mass, adding into a small double-roll open mill, fully mixing for 13-18 min under the conditions that the temperature is 90-105 ℃ and the double-roll distance is 1-2 mm, repeatedly beating a triangular bag for 5-9 times in the process, adjusting the distance between the double rolls to be 2-4 mm, and then discharging the sheet;

(2) and (2) weighing 125-145 g of the test piece obtained in the step (1), putting the test piece into a mold preheated in advance in a flat vulcanizing machine, and carrying out mold pressing foaming at the temperature of 160-175 ℃, wherein the foaming time is 8-12 min, and the mold pressing is 8-15 MPa, so as to obtain the light high-resilience SEBS foamed sole sheet.

And (2) the temperature rise rate of the open mill in the step (1) is 3-7 ℃/min.

The thickness of the sheet in the step (1) is 1.5-5 mm.

And (3) the thickness of the light high-resilience SEBS foamed sole sheet in the step (2) is 12-18 mm.

And (3) the foaming multiplying power of the light high-resilience SEBS foamed sole material obtained in the step (2) is 1.2-1.7 times.

Further, the light high-resilience SEBS foamed sole is applied to the preparation of the outsole, the insole or the integral sole of slippers, sandals, casual shoes, sneakers, sports shoes and the like.

The invention has the following beneficial effects:

(1) according to the preparation method of the light high-resilience SEBS foamed sole disclosed by the invention, the SEBS is used as a main material, so that the resilience of the SEBS can be obviously improved under the advantage of not influencing the skid resistance and wear resistance of the SEBS, the SEBS has strong processability, and the operation is simple and convenient.

(2) The light high-resilience SEBS foamed sole prepared by the method has the advantages of good compatibility and full combination of raw materials, light weight, high resilience rate and strong comfort, can be used as undersoles, midsoles or integral soles of slippers, sandals, leisure shoes, sneakers, sports shoes and the like, has high use value, and can be widely popularized.

(3) The SEBS has good thermal stability, weather resistance, heat resistance, oxidation resistance and solvent resistance.

(4) The preparation method of the light high-resilience SEBS foamed sole disclosed by the invention adopts simple chemical foaming, and has the advantages of simple preparation process, low cost and strong processability.

(5) The preparation method of the light high-resilience SEBS foamed sole disclosed by the invention has the advantages of strong anti-aging performance, light weight, high resilience and capability of eliminating fatigue feeling, and is a good choice for pursuing light weight and high elasticity shoes.

(6) The STE added in the formula can not only react with ZnO to promote the activity of the ZnO, but also is a main vulcanization promoting auxiliary agent, so that the prepared sole has better performance.

Detailed Description

The present invention will be further described with reference to the following examples.