TCR- is a new material for shoe soles or shoe midsole - elastic rubber heat controllable, resilient material iT is a new line of new materials company Guangdong Institute of China Leather Research Institute jointly study, known as synthetic stretch plastics and rubber.
Summary
EPDM material obtained in the amorphous region portion compatible at 110 ~ 160 ℃ and EVA blend kneaded together -EVA / EPDM, in the role of initiator, its compatibility can be improved, but its viscosity with EPDM and increase the amount of increase, unable to ensure the smooth process of injection molding and injection. Therefore, the introduction of ethylene - octene copolymer (POE) as to improve the shortcomings subject to greater limitations in the practical application.
(1) POE can be added to improve the EVA / EPDM foamed material flexibility. POE good compatibility with EVA, POE component increases, the cell density increases, the pore size becomes small and the uniformity is improved; the density of the material becomes smaller, the hardness and tensile strength decreased, elongation at break and return Flexible improved significantly.
(2) in EVA / EPDM / POE foaming system, the control EVA / EPDM is 70 to 80 parts, POE 20 to 30 parts, AC 3 parts, DCP to 1.1 parts, ZNO 2 parts, STE 1.1 parts , ZNST 1.0 parts Talc 15 parts, can be made better performance of high-elastic composite foam. From the foam and the performance test results, to meet the performance requirements of the comprehensive sports foam soles material.
Claim
The present invention utilizes POE for EVA / EPDM foam material was modified. OK foaming system, the test POE impact on the amount of foam density, mechanical properties and cell size size. By blowing agents, crosslinking agents, foaming aids, lubricants and other auxiliary dosage adjustment may be prepared with different densities and different mechanical properties of the foam material, to broaden the EVA / EPDM and field use POE and stable quality.
Process technology as follows:
1. first EVA, POE, EPDM graft material and mixing in the mixer in full uniform;
2. Then the foaming agent, a crosslinking agent, foaming aid, talc and other materials added to the present invention EVA / POE masterbatch was added to the mixer and kneaded, to obtain a good compatibility with EVA / EPDM / POE composite foam material;
3. The mixture in the double crank mixer and granulator pumping material into the shape of circular particle size used in the injection molding machine or injection molding machine, can be made of synthetic rubber elastic plastic products.
4. A synthetic rubber elastic plastic soles, characterized in that: the following parts by mass of the raw materials obtained: in EVA / EPDM / POE foaming system, the control EVA / EPDM is 70 to 80 parts, POE 20 to 30 parts, AC 3 parts, DCP was 1.1 parts, ZNO 2 parts, STE to 1.1 parts, ZNST 1.0 parts Talc 15 parts, can be made better overall performance of high-elastic composite foam.
5, such as synthetic rubber for soles of elastic plastic as claimed in claim 1, characterized in that the better the overall performance can be made highly elastic composite foam. From the material and the performance test results show that overall performance to meet the requirements of sports foam soles material.
6, such as the small material for soles according to claim 1-3, characterized in that it is smaller than the average level in the heat-resistant materials for the case of high heat resistance, weather resistance, high temperature grade material.
7, as described in claims 1-3 of a synthetic rubber for soles of elastic plastic, characterized in that the control EVA / EPDM is 70 to 80 parts, POE 20 to 30 parts, AC 3 parts, DCP 1.1 parts, ZNO 2 parts, STE to 1.1 parts, ZNST 1.0 parts Talc 15 parts, can be made better overall performance of TCR- thermally controllable elastic rubber.
8, synthetic rubber, elastic plastic and a preparation method for soles according to claim 1-3, characterized in that the first EVA, POE, EVA and EPDM grafted species in the mixer was sufficiently kneaded uniformly, and then a blowing agent, a crosslinking agent, foaming aid, talc and other materials of the present invention is added to the mixer in EVA masterbatch kneaded mixture obtained has good compatibility with EVA / EPDM / POE composite foam and the mixture in the double crank mixer and granulator pumping material into the shape of circular particle size used in the injection molding machine or injection molding machine, so that the process becomes simple, cost savings, improve key performance indicators foam material prepared.
9. The cell structure of the foamed material by scanning electron microscope observation of the physical properties of the foam material to be tested. Display foaming agent azodicarbonamide (AC), a crosslinking agent dicumyl peroxide (DCP), talc, etc. The amount of POE / EVA / EPDM influence of composite foam material properties, obtained excellent overall performance high elastic POE / EVA / EPDM composite foam material optimization formulations, namely TCR- thermally controllable elastic rubber.
Elastic synthetic plastics and rubber soles and preparation method
TECHNICAL FIELD
1, the present invention belongs to the technical field of shoe materials, particularly those involving new materials and preparation method for shoe soles - a mixture of thermally controllable elastic rubber EVA / EPDM / POE namely TCR- heat controllability elastic rubber.
Background technique
2, there are some high-pressure polyethylene and partially made of rubber as the main ingredient soles, rubber and plastic and use.
This invention materials, rubber and EVA dual display excellent physical properties at room temperature, at a high temperature polymer capable of plastics molding elastic material - is a new line of elastic material iT new materials company Guangdong Institute of China Leather Research Institute jointly study , highly elastic plastics known as synthetic rubber. Its products not only have the traditional cross-linked vulcanized rubber anti-aging, wear, slip the excellent performance, but also have a lightweight EVA foam and feel. Way using injection molding production, outlet scrap can be reused. Imports of plastic injection molding machine, not only simplifies the process, and reduce processing costs, and therefore the controllability of elastic rubber heat TCR material has become a new material can replace conventional rubber most competitive of its environmental, non-toxic, feel comfortable , lightweight, attractive appearance, to make products more innovative. Therefore a more humane, high-quality new synthetic material, is the world's standards of environmentally friendly materials.
TCR has the characteristics
⒈ good impact and fatigue resistance.
⒉ high impact strength and good low temperature flexibility.
Maintain a good performance when ⒊ low temperatures.
⒋ good resistance to chemicals, oil, solvents and weather.
⒌ high tear strength and high abrasion performance.
⒍ low proportion of ultra-light soles give you the feeling of flying.
⒎ good flexibility, with a strong damping effect.
In response to market demand for this particular piece making such improvements.
Main features
1, environmental protection, non-toxic, non-polluting (with European nontoxic standard certificate)
2, a simplified production process
3, has excellent resistance to low temperature, high temperature
4, soft touch, excellent surface quality
5, a broad hardness range: 10C-80C
6, the outlet material, scrap can be recycled (EVA foam used as the secondary market)
7, for adjustment to follow the needs of customers the most suitable material
8, processing non-toxic, but does not produce an unpleasant odor
9, no harm to the environment and equipment
Physical properties
1, a good appearance of texture, feel gentle, easy to color, color uniformity, stability;
2, adjustable physical properties, and provide a vast space for product design;
3, the mechanical properties of the vulcanized rubber can be compared;
4, 10C-80C wide hardness range adjustable;
5, excellent resistance to tensile properties, tensile strength of up to a dozen Mpa, elongation at break of up to ten times or more;
6, long-term temperature can exceed 70 ℃, good low temperature performance, at a temperature of -60 ℃ still maintain good flexural properties;
7, good electrical insulation resistance and voltage characteristics;
8, with outstanding slip resistance, abrasion resistance and weather resistance.
9, low specific gravity, light brings a relaxed feeling.
10, to enhance the market competitiveness of products
Thermally controllable elastic rubber has physical and mechanical properties of vulcanized rubber and lightweight plastic (EVA) double performance. The modern concept of consumption, is no longer "dragging heavy feet" but "Leisure - Comfort - lightweight - Fashion" believe, with the TCR, the world change because of you. . . . . . .
The following is a summary of the various mixtures of the above-mentioned amount of material formulations mentioned after mixing and granulation and injection molding products, such as the experimental data made after the end of the production process: POE composite foam material impact on performance as a modifier .
SUMMARY OF THE INVENTION
1, the object of the present invention to provide a method for the synthesis of elastic plastic rubber soles, thus improving the shoes of wearing comfort.
2, the technical aspect of the present invention is used as follows:
In AC, DCP, ZNO, STE, ZNST and the amount of talc fixed case (AC 3 parts, DCP was 1.1 parts, ZNO 2 parts, STE to 1.1 parts, ZNST1 parts, talc 15 parts), to change the EVA and POE mass component ratio.
20MIN kneading on an open mill, the temperature 80 ℃. A film, granulation, injection molding foaming machine, the temperature of 160-170 ℃, time 5-10MIN. Cold shaping, cutting the amount of sample sets, packaging and shipping.
3, a conventionally used ethylene - vinyl acetate copolymer (EVA) is a thermoplastic rubber-like, having excellent flexibility, low temperature flexibility, elasticity, resistance to stress cracking resistance, and good plasticity, easiness of processing, so widely used.
4, EVA foam material is cross-linked with a low density, high strength, etc. can absorb the load. However, deformation, wear resistance is not enough, and the presence of slip, low temperature hardened disadvantages. The present invention materials mainly for the formulation and process improvements, which added modifier is an important way to formulation design.
5, the present invention uses POE to EVA / EPDM foam material was modified. OK foaming system, the test POE impact on the amount of foam density, mechanical properties and cell size size.
6 is applied to the zinc oxide of the formula, primarily as EVA / EPDM activator. Its fine particles having a large surface area, having good dispersibility and good adsorption properties, which can promote the EVA / EPDM vulcanization, activation and aging effects reinforcement, to achieve stability, improved processing safety, a significant reduction in adverse rate, and improve the tear resistance of rubber products, abrasion resistance.
7, stearic acid is EVA / EPDM and accessories widely used in curing active agent, also used as plasticizers and softeners. In the production of EVA / EPDM process stearate to be added as emulsifier, in the manufacture of foam rubber, can be used as foaming agent stearate, stearic acid can also be used EVA / EPDM products release agent.
8, the material of the present invention consists of the following parts by mass of the starting material was prepared: Control EVA / EPDM is 70 to 80 parts, POE 20 to 30 parts, AC 3 parts, DCP to 1.1 parts, ZNO 2 parts, STE 1.1 parts , ZNST 1.0 parts Talc 15 parts, can be made better overall performance of high-elastic composite foam.
9, elastic synthetic rubber and plastics for the sole preparation method according to claim 1, wherein the first host material and auxiliary inputs; then turn into the filler, the active agent mixing time 3-4min ; later into other small material mixing 6-7min, then the film is cooled and granulated; the set weight synthetic elastic plastic tube into the rubber particles via injection in the mold temperature 160-170 ℃, pressure 10-15mpa (75KG / CM3), the vulcanization 5-10min, to obtain the elastic synthetic plastics and rubber finished products.
10, approximately 20-24h after the film mixer, can be expected for the second kneading again, specifically as follows: Weighing 40kg, the mixing on the mill scale into 5-6 mm, kneading 3 minutes, then hit less than one millimeter scale, masticated. Measuring sulfur change, time TS: 1.8 分钟, TC90: 2.8 minutes. Curing time of 5-10 minutes can be directly formed into a vulcanized sole.
11. A method as claimed in part is not detailed in the skilled personnel to the prior art, but must pay attention to cooling, stereotypes, registering, packaging and advised to fight to make it fully breathable vent.
12, the present invention over the prior art, has the following advantages:
The present invention provides a synthetic elastic plastics and rubber for soles, scientific formula, low cost, simple preparation process, flexibility will be applied soles, wear very comfortable.
13, wherein the thermally controllable TCR- elastic rubber, zinc oxide, stearic acid are EVA / EPDM-specific level.
DETAILED DESCRIPTION
14, Example 1: Synthesis of an elastic plastics and rubber for soles, which consists of the following parts by mass of the raw materials obtained: EVA / EPDM is 70 to 80 parts, POE 20 to 30 parts, AC 3 parts, DCP is 1.1 parts, ZNO 2 parts, STE to 1.1 parts, ZNST 1.0 parts Talc 15 parts, can be made better overall performance of high-elastic composite foam.
15, the first host material and auxiliary inputs; then turn into the filler, the active agent mixing time 3-4min; other materials into the kneading after 6-7min, a film and granulation; set weight synthetic elastic plastic tube into the rubber by injection in the mold temperature 160-170 ℃, pressure 10-15mpa (75KG / CM3), the curing 5-10 minutes to obtain the finished synthetic rubber elastic plastic.
16, the sole can flexural 120,000 times. Yellowing resistance 12h reached 4.0.
17, the above examples are only some of the preferred embodiments of the present invention, but the scope of the present invention is not limited thereto. Those skilled in the art would understand that all is not departing from the spirit and scope of the present invention any modification or partial replacement are within the scope of the present invention.