Ethylene-vinyl acetate copolymer mixture foaming material with high plant source content, manufacturing method and application thereof
A vinyl acetate copolymerization and foaming material technology, applied in the field of ethylene-vinyl acetate copolymers, can solve the problems of unstable foaming quality, decreased recyclability, and large dependence, and achieve the goal of increasing recyclability, increasing physical properties, and reducing dosage Effect
Inactive Publication Date: 2019-03-15
HONG MING ECO TECH
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Problems solved by technology
[0005] In order to solve various problems such as the existing ethylene-vinyl acetate copolymer needs to rely on a large amount of petroleum raw materials, the addition of bridging agents leads to a decrease in recyclability, unstable foaming quality, and the need to add additional antifungal agents, etc., the present invention provides a high plant source content An ethylene-vinyl acetate copolymer mixture foaming material, which comprises 30-60% by weight of a modified plant source powder with a moisture content of less than 1%, 40-70% by weight of an ethylene-vinyl acetate copolymer, The weight percentage of the toughening agent is 0-30%, the weight percentage of the bridging agent is less than 2%, and the weight percentage of the foaming agent is less than 10%; wherein, the modified plant source powder contains a plant source with a water content of less than 5% uniformly mixed Powder, modifier, plasticizer, slip agent, coupling agent and functional additive
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[0020] In order to make it easier for those skilled in the art to understand the technical solutions and beneficial effects of the present utility model, specific implementation methods are described below in conjunction with the accompanying drawings.
[0021] like figure 1 Shown, a preferred embodiment of the manufacturing method of the ethylene-vinyl acetate copolymer mixture foaming material with high plant source content of the present invention, it comprises:
[0022] Step 1: Drying a plant source powder comprising starch and one or more mixtures selected from bamboo powder, straw powder, rice bran powder or coffee powder in an oven until the moisture content is less than 5%;
[0023] Step 2: After putting the plant source powder into the high-speed mixer, while stirring, add modifiers, plasticizers, slip agents, coupling agents and functional additives to the plant source powder in a fixed order, the process temperature At 80-120° C. and a rotating speed of 800-1200 rp...
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The invention discloses an ethylene-vinyl acetate copolymer mixture foaming material with high plant source content. The ethylene-vinyl acetate copolymer mixture foaming material has water content less than 1% and comprises, by weight, 30 to 60% of modified plant source powder, 40 to 70% of ethylene-vinyl acetate copolymer, 0 to 30% of flexibilizer, less than 2% of bridging agent, and less than 10% of foaming agent, which are uniformly mixed. The modified plant source powder comprises a plant source powder with water content less than 5%, modifying agent, plasticizer, lubrication prescription, coupling agent, and function agent which are uniformly mixed. By adjusting the water content of the modified plant source powder to be less than 1%, a problem can be improved that starch is liable to adsorb excessive moisture and thus causes over large shrinking percentage of a foaming product and enable a product to be liable to deform and generate flaws or unstable quality.
Description
technical field [0001] The invention relates to an ethylene-vinyl acetate copolymer, in particular to an ethylene-vinyl acetate copolymer mixture with high plant source content. Background technique [0002] Ethylene-co-vinyl acetate (Polyethylene-co-vinyl acetate, EVA) is light and has good chemical stability, adhesion, processability and aging resistance. It is an excellent polymer material, especially suitable for use in shoes Classes, cushions and other foam products. However, its source mainly depends on petroleum raw materials, but with the gradual reduction of petroleum energy, how to reduce the amount of petroleum used to produce such products is a major trend to be solved. [0003] In order to reduce the amount of raw material petroleum required for ethylene-vinyl acetate copolymers, foaming products related to ethylene-vinyl acetate copolymers added with starch have emerged as the times require. Although starch can reduce the amount of plastics used and the effect...
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IPC IPC(8): C08L3/02C08L97/02C08L23/08C08L9/00C08L7/00C08K13/02C08K3/22C08K5/098C08J9/10
Inventor 杨华鸿林建诚
Owner HONG MING ECO TECH