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Formula preparation method of high-flame-retardant material for window screen
Inactive Publication Date: 2018-04-20
天津市恒宇磁塑制品有限公司
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However, PP itself is flammable, it generates a lot of heat when it burns, it burns fast, and it is accompanied by the droplet phenomenon, which poses a safety hazard
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[0054] A method for preparing a highly flame-retardant material for window screens, comprising a mixing step, a filling step, and an extrusion mixing step, wherein the mixing step, the filling step, and the extrusion mixing step are performed sequentially,
[0055] In the mixing step, the flame retardant and the surfactant are uniformly mixed in a high-speed mixer and fully activated, then polypropylene, antioxidant, anti-dripping agent, and lubricant are added and mixed uniformly to obtain a mixed raw material;
[0056] In the filling step, the mixed raw materials are filled into a twin-screw extruder, and one of polyethylene and polyethylene terephthalate resin is filled into another twin-screw extruder,
[0057] In the extrusion mixing step, the materials in the two twin-screw extruders are co-extruded into the co-extrusion head, mixed in the co-extrusion head and then shaped to form a modified high flame-retardant material with a core-shell structure.
[0070] Step 1 Mix the flame retardant and surfactant in the formula evenly in a high-speed mixer, fully activate, then add polypropylene, antioxidant, anti-dripping agent, lubricant, and mix evenly;
[0071] Step 2: Put the mixed materials in step 1 into a twin-screw extruder, and extrude them into a co-extrusion head with a special channel, the screw speed is 60rpm, and the temperature is 180°C;
[0072] Step 3 At the same time, add polyethylene to another twin-screw extruder, extrude it into the co-extrusion head of the special flow channel i...
[0082] Step 1 Mix the flame retardant and surfactant in the formula evenly in a high-speed mixer, fully activate, then add polypropylene, antioxidant, anti-dripping agent, lubricant, and mix evenly;
[0083] Step 2: Put the mixed materials in step 1 into a twin-screw extruder, and extrude them into a co-extrusion head with a special channel, the screw speed is 60rpm, and the temperature is 180°C;
[0084] Step 3 At the same time, add polyethylene to another twin-screw extruder, extrude it into the co-extrusion head o...
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Abstract
The invention discloses a formula of a high-flame-retardant material for a window screen. The formula comprises polypropylene, polyethylene, polyethylene terephthalate, a flame retardant, a surfactant, an antioxidant, an anti-dropping agent and a lubricant. The high-flame-retardant material for the window screen, disclosed by the invention, has the beneficial effects that aluminum powder is used as the flame retardant, so that the flame retardant effect is good, the heating rate of a material is slowed down, the combustion is hindered, and the aluminum powder covering the surface of the material plays the role of a physical barrier, and can insulate heat and oxygen and inhibit the flow of a flammable gas to a matrix to achieve the effect of flame retardancy; the high-flame-retardant material has excellent weather resistance, aging resistance, heat resistance and long service life, and does not decompose to produce toxic substances; the high-flame-retardant material has no smoke or toxic substances in a combustion process, and has good strength and impact resistance; furthermore, the material has good bonding performance and does not need to use additional binders when being woven into a yarn mesh, thereby being safe and environmentally friendly.
Description
technical field [0001] The invention relates to the field of window screen production, in particular to a highly flame-retardant material used for window screen production and a preparation method thereof. Background technique [0002] At present, the window screen products on the market are mainly glass fiber window screens. Fiberglass window screening is formed by weaving glass fibers coated with polyvinyl chloride (PVC) coating. Due to the poor heat resistance of PVC materials, it is easy to decompose at high temperature to produce hydrogenchloride gas, which will cause great harm to the human body; and the weather resistance of PVC materials is poor, easy to age, and has a short service life; at the same time, when PVC materials are burned, they will also produce dioxins, which have great Strong carcinogenicity. Therefore, it is imperative to develop a new generation of window screen substitutes. [0003] Polypropylene is one of the most commonly used general-purpose...
Claims
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