Flame-retardant reinforced high-temperature-resistant nylon composite material

A nylon composite material and high-temperature-resistant technology, which is applied in the field of flame-retardant reinforced high-temperature-resistant nylon composite materials, can solve problems affecting the appearance of the product, precipitation, mold pollution, etc., achieve excellent visual effects, improve initial whiteness, reduce cost effect

Inactive Publication Date: 2020-04-10
BENSONG ENG PLASTICS HANGZHOU
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the addition of flame retardants will cause degradation and yellowing of molded products made of flame-retardant and high-temperature resistant materials. The glass fiber will cause the floating fiber on the surface of the molded product (the glass fiber is exposed on the product surface) to be very obvious, which will affect the quality requirements of the product appearance
[0003] At present, a large amount of titanium dioxide is usually added to flame-retardant and high-temperature-resistant nylon composite materials to improve the whiteness of the product, but the price of titanium dioxide is relatively high (15-30 yuan / kg), and the amount of use is relatively large (generally accounting for flame-retardant 3% to 5% of the total mass of high-temperature-resistant materials), which greatly increases the production cost of flame-retardant high-temperature-resistant nylon materials. In addition, titanium dioxide has a large proportion, and long-term storage will cause precipitation, which will affect the appearance of the product. Most importantly, titanium dioxide The addition of white powder will reduce the mechanical properties of the product, reduce the impact strength and toughness, and affect the performance and life of the product
[0004] In addition, by adding antioxidants and heat stabilizers to reduce the risk of yellowing of flame-retardant reinforced high-temperature resistant nylon composite materials under heat degradation during extrusion, granulation or injection molding, most high-temperature nylon resins have a higher melting point, such as PA6T / 66 materials The melting point reaches 310°C. At this processing temperature, most antioxidants and heat stabilizers have the risk of decomposition during processing. Therefore, the effect of improving the initial color of the material by adding antioxidants and heat stabilizers is general. There is a risk of mold contamination due to the gradual accumulation of decomposition products at the exhaust position of the mold to form a layer of oil

Method used

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  • Flame-retardant reinforced high-temperature-resistant nylon composite material
  • Flame-retardant reinforced high-temperature-resistant nylon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh each by weight ratio of 30kg nylon 46, 30kg short glass fiber (single filament diameter 6 μm, length 3mm), 10kg flame retardant (brominated polystyrene), 3kg antimony trioxide, 0.1kg polyvinylpyrrolidone After the components are mixed, the other components except the glass fiber are mixed uniformly to obtain the premix; then the obtained premix is ​​put into the twin-screw extruder, and the glass fiber is put into the side feeding process, melted and kneaded, extruded The flame-retardant reinforced high-temperature-resistant nylon composite material is obtained by pelletizing. The process parameters of the twin-screw extruder are: the temperature of the feeding section is 290°C, the temperature of the melting and plasticizing section is 280°C, the temperature of the mixing and homogenizing section is 250°C, and the temperature of the melting section is 250°C. The temperature of the conveying section of the body is 260°C, the temperature of the head is 290°C, and th...

Embodiment 2

[0026] According to 34kg nylon 6T / 66, 50kg short glass fiber (single filament diameter 12μm, length 4mm), 12kg flame retardant (brominated polystyrene), 4kg antimony trioxide, 0.5kg polyvinylpyrrolidone, 0.5kg ethylene acrylic acid The weight ratio of the copolymer After weighing each component, first mix the other components except glass fiber evenly to obtain a premix; then put the obtained premix into a twin-screw extruder, and adopt the side feeding process Put in glass fiber, melt and knead, extrude and granulate to obtain a flame-retardant reinforced high-temperature-resistant nylon composite material. The process parameters of the twin-screw extruder are: the temperature of the feeding section is 300°C, the temperature of the melting and plasticizing section is 310°C, and the mixing The temperature of the homogenization section is 255°C, the temperature of the melt conveying section is 270°C, the temperature of the head is 300°C, and the speed of the host of the twin-scr...

Embodiment 3

[0030] According to 45kg nylon 6T / 6I, 55kg short glass fiber (monofilament diameter 13μm, length 5mm), 20kg flame retardant (polybrominated styrene), 6kg anhydrous zinc borate, 1kg polyvinylpyrrolidone, 0.5kg ethylene acrylic acid copolymer After weighing each component, mix other components except glass fiber evenly to obtain a premix; then put the obtained premix into a twin-screw extruder, and use the side feeding process to input Glass fiber, melted and kneaded, extruded and granulated to obtain a flame-retardant reinforced high-temperature-resistant nylon composite material. The process parameters of the twin-screw extruder are: the temperature of the feeding section is 320 ° C, the temperature of the melting and plasticizing section is 330 ° C, and the mixing is uniform. The temperature of the melting section is 260°C, the temperature of the melt delivery section is 290°C, the temperature of the head is 330°C, and the speed of the main engine of the twin-screw extruder is...

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Abstract

The invention discloses a flame-retardant reinforced high-temperature-resistant nylon composite material which is prepared from the following raw materials in parts by weight: 30 to 45 parts of high-temperature nylon resin, 30 to 55 parts of glass fibers, 10 to 20 parts of flame retardant and 0.1 to 2.0 parts of polyvinylpyrrolidone. According to the material, the polyvinylpyrrolidone is introduced into a formula system of the flame-retardant reinforced high-temperature-resistant nylon composite material, so that the initial whiteness of the composite material can be remarkably improved, titanium dioxide is not required to be added when a light-color product is prepared, the initial whiteness L value of an obtained molded product is greater than 80, and the prepared molded product has an excellent visual effect, the reduction of the cost is facilitated, and the molded product is smooth in surface, so that the problem of fiber floating on the surface of the product is effectively solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant reinforced high-temperature-resistant nylon composite material. Background technique [0002] Flame-retardant and high-temperature-resistant nylon has properties such as light weight, high temperature resistance, high strength, stable size, and flame retardancy, and is widely used in the automotive industry and the electronics industry. At present, when preparing flame-retardant and high-temperature resistant nylon, flame retardants and glass fibers are usually added to improve the flame-retardant performance and mechanical strength of flame-retardant and high-temperature resistant nylon. However, the addition of flame retardants will cause degradation and yellowing of molded products made of flame-retardant and high-temperature resistant materials. The glass fiber will cause the floating fiber on the surface of the molded product (the glass fiber is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L39/06C08K7/14C08J5/04
CPCC08J5/043C08J2377/06C08J2439/06
Inventor 曾湘云陈蒋狄张光辉周永松
Owner BENSONG ENG PLASTICS HANGZHOU
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