Method for preparing simulated EVA (ethylene vinyl acetate) flower from modified sodium alginate-carbon fiber
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A technology of sodium alginate and carbon fiber, which is applied in the field of artificial flowers, can solve the problems of poor water resistance and wear resistance, and achieve the effects of improving water resistance, improving hardness and brittleness, and improving tensile strength and wear resistance
Inactive Publication Date: 2020-01-17
界首市希捷仿真花卉有限公司
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[0004] However, commercially available EVA artificial flowers have the defects of poor water resistance and poor wear resistance. This application adds epoxy-terminated polyurethane modified sodium alginate and surface-treated carbon fibers to EVA resin, and fills them with corn stalk lignin Modified SBS elastomer, surface-modified talc powder, and surface-modified nano-calcium carbonate are evenly mixed to prepare a modified EVA for artificial flowers with excellent water resistance and wear resistance
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Embodiment 1
[0029] A method for preparing artificial EVA flowers with modified sodium alginate-carbon fiber, is characterized in that, comprises the following steps, and following raw materials are by weight:
[0030] (1) Preparation of polyurethane modified sodium alginate:
[0031] Add 5 parts of modifier epoxy-terminated polyurethane emulsion to 10 parts of sodium alginate aqueous solution, adjust the pH to 8, stir and react at 70°C for 65 minutes, and use acetone Soxhlet extraction to obtain epoxy-terminated polyurethane modified alginic acid sodium;
[0032] Wherein, the sodium alginate aqueous solution concentration is 2%;
[0033] (2) Surface treatment of carbon fiber:
[0034] After cleaning 6 parts of carbon fiber in acetone solution, rinse it with absolute ethanol, dry it at room temperature, and then immerse it in a rare earth lanthanum chloride solution with a pH of 5. After soaking for 1 hour, dry it under vacuum at 115°C to obtain a surface treated carbon fiber;
[0035]...
Embodiment 2
[0042] A method for preparing artificial EVA flowers with modified sodium alginate-carbon fiber, is characterized in that, comprises the following steps, and following raw materials are by weight:
[0043] (1) Preparation of polyurethane modified sodium alginate:
[0044] Add 10 parts of modifier epoxy-terminated polyurethane emulsion to 20 parts of sodium alginate aqueous solution, adjust the pH to 9, stir and react at 80°C for 55 minutes, and use acetone Soxhlet extraction to obtain epoxy-terminated polyurethane modified alginic acid sodium;
[0045] Wherein, the sodium alginate aqueous solution concentration is 4%;
[0046] (2) Surface treatment of carbon fiber:
[0047] After cleaning 9 parts of carbon fiber in acetone solution, rinse it with absolute ethanol, dry it at room temperature, and then immerse it in a rare earth lanthanum chloride solution with a pH of 5. After soaking for 2 hours, dry it under vacuum at 125°C to obtain a surface treated carbon fiber;
[0048]...
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Abstract
The invention discloses a method for preparing a simulated EVA (ethylene vinyl acetate) flower from modified sodium alginate-carbon fiber. The method comprises the following steps: adding a modifier,namely an epoxy-terminated polyurethane emulsion, into an aqueous solution of sodium alginate, performing a stirring reaction, and performing Soxhlet extraction by using acetone so as to obtain epoxy-terminated polyurethane modified sodium alginate; cleaning carbon fiber in an acetone solution, rinsing the carbon fiber with anhydrous ethanol, drying the carbon fiber at room temperature, then immersing the carbon fiber into a rare earth lanthanum chloride solution, performing immersion treatment, and performing vacuum drying so as to obtain carbon fiber with surface treatment; mixing and heating EVA resin, a maize straw lignin modified SBS (styrene-butadiene-styrene) elastomer, petroleum resin, surface modified talcum powder and surface modification nano calcium carbonate, and adding the epoxy-terminated polyurethane modified sodium alginate, carbon fiber with surface treatment and an antioxidant, dicumyl peroxide, maleic anhydride and paraffin wax, performing uniform mixing, and performing discharging, so as to obtain modified EVA for simulated flowers.
Description
technical field [0001] The invention belongs to the field of artificial flowers, and in particular relates to a method for preparing artificial EVA flowers with modified sodium alginate-carbon fibers. Background technique [0002] Artificial flowers refer to artificial flowers made of stretch silk, crepe paper, polyester, plastic, crystal and other materials, as well as dried flowers baked from fresh flowers. They are generally called artificial flowers in the industry. As the name suggests, artificial flowers are based on fresh flowers and imitated with cloth, yarn, silk, plastic and other raw materials. Today, the craftsmanship of artificial flowers is becoming more and more refined, and it can almost resemble the real one. In addition to imitations of various flowers, there are also artificial leaves, artificial branches, artificial weeds, artificial trees, artificial plants and other varieties on the market. [0003] In addition to being durable for a long time, artifi...
Claims
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