A high fatigue-resistant nylon composite material for office chairs and its preparation method

A nylon composite material and office seat technology, applied in the field of polymer materials, can solve the problems of easy breakage, failure to meet sustainable development, and low elongation at break of composite materials, so as to improve the phenomenon of whitening and wide coloring The dyeing effect, the effect that the processing method is simple

Active Publication Date: 2020-06-02
杭州金州高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And although the above-mentioned 40% kaolin filled nylon 66 composite material improves the problem of warping and deformation and improves the impact strength, but because such inorganic mineral powders such as kaolin are hydrophilic and oleophobic non-metallic minerals, unmodified inorganic The compatibility between the filler and the polymer interface such as nylon is very poor, which shows that the elongation at break of the composite material is very low, so that the molded product has poor flex resistance, is easy to break and damage, and shortens the service life of the product. And the conditions of use are greatly reduced, especially for products such as small table boards on office chairs that are repeatedly flexed and artificially pressed. According to market feedback, whether the toughness of the product that customers care about is largely related to the elongation at break of the material Sufficient is relevant, not just for impact strength in the traditional sense
At the same time, due to the added saturation of inorganic mineral powder in the resin and its own oil absorption characteristics, the appearance of highly filled mineral powder nylon surface will produce a lot of whitish silver threads, so it cannot be used as appearance parts. In order to improve the appearance of product parts Apparently, the existing technology generally adds small molecule flow modifiers, which have adverse effects on nylon such as destroying amide bonds and destroying crystallinity. This is an improvement at the expense of physical strength and service life of composite materials. Sexual way, not in line with the concept of sustainable development

Method used

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  • A high fatigue-resistant nylon composite material for office chairs and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Treat the surface of the inorganic mineral powder with an aminated silane coupling agent (glycidyl ether oxypropyl trimethoxysilane), first mix 80 parts of inorganic mineral powder (mica) and 20 parts of alcohol with a concentration of 95% Add to the mixer, stir at low speed (450r / min) for 3 minutes, let the alcohol be fully absorbed by the inorganic mineral powder, then add 1 part of silane coupling agent to the mixer, heat to 90°C, stir at high speed (1200r / min) In 10 minutes, the silane coupling agent will be hydrolyzed under the action of heating and alcohol, and the coupling reaction will be carried out with the hydroxyl groups on the surface of the inorganic mineral powder. Agent-modified inorganic mineral powder;

[0037] (2) Mix polyamide 6, chain extender (alternating copolymer of maleic anhydride and ethylene) and inorganic mineral powder in a ratio of 52:1:40 through a mixer for 10 minutes to obtain a homogeneous mixture;

[0038] (3) Raise the temperatu...

Embodiment 2

[0041] (1) Treat the surface of the inorganic mineral powder with an aminated silane coupling agent (aminopropyltriethoxysilane), first add 80 parts of inorganic mineral powder (mica) and 20 parts of alcohol with a concentration of 9% In the mixer, stir at low speed (450r / min) for 3 minutes, let the alcohol be fully absorbed by the inorganic mineral powder, then add 2 parts of silane coupling agent into the mixer, heat to 90°C, stir at high speed (1200r / min) for 10 Minutes, the silane coupling agent will be hydrolyzed under the action of heating and alcohol, and the coupling reaction will be carried out with the hydroxyl group on the surface of the inorganic mineral powder. After the completion, the powder is dried in the powder drying equipment at 100°C to obtain the silane coupling agent Modified inorganic mineral powder;

[0042] (2) Mix polyamide 6, chain extender (epoxy compound: maleic anhydride and ethylene alternating copolymer = 1:1), and inorganic mineral powder in a...

Embodiment 3

[0046] (1) Treat the surface of the inorganic mineral powder with an aminated silane coupling agent (vinyl tris(β-methoxyethoxy) silane), first mix 80 parts of inorganic mineral powder (mica) and 20 parts of alcohol Add to the mixer, stir at low speed (450r / min) for 3 minutes, let the alcohol be fully absorbed by the inorganic mineral powder, then add 2 parts of silane coupling agent into the mixer, heat to 90°C, stir at high speed (1200r / min) In 10 minutes, the silane coupling agent will be hydrolyzed under the action of heating and alcohol, and the coupling reaction will be carried out with the hydroxyl groups on the surface of the inorganic mineral powder. Agent-modified inorganic mineral powder;

[0047] (2) Polyamide 6, chain extender (epoxy compound: alternating copolymer of maleic anhydride and ethylene

[0048] : Isocyanate = 2:1:1), inorganic mineral powder according to the ratio of 51:2:40 and mixed by a mixer for 10 minutes to obtain a uniform mixture;

[0049] (3...

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Abstract

The invention discloses a high fatigue resistance nylon composite material for office seats and a preparation method thereof and belongs to the technical field of high molecular materials. The nylon composite material is prepared by utilizing polyamide, a chain extender, an additive and inorganic mineral powder modified by a silane coupling agent as raw materials and melting and extruding out by atwin-screw extruder. The method has the advantages of simpleness in operation and convenience in process; furthermore, the material has the excellent performance of excellent mechanical property, good appearance, low production cost and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-fatigue-resistant nylon composite material for office seats and a preparation method thereof. Background technique [0002] Nylon 6 is one of the engineering plastics formed by polycondensation of caprolactam. At present, because of its low melting point and wide processing technology range, it has become one of the products with wide application and large dosage; at the same time, because of its good self-lubrication, excellent oil resistance, heat resistance It is widely used in products from all walks of life due to its characteristics of high performance and high mechanical strength. [0003] However, nylon 6 has its obvious disadvantages, such as high water absorption and poor dimensional stability of product parts. In order to meet the market demand, to overcome the inherent defects of nylon 6, to improve the physical properties of nylon 6 and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L77/06C08L35/00C08K13/06C08K9/06C08K3/34C08K5/134C08K5/3475C08K3/26C08K5/29B29C48/92
CPCB29C48/92B29C2948/92704C08K2003/265C08L77/02C08L2205/03C08L2205/035C08L77/06C08L35/00C08K13/06C08K9/06C08K3/34C08K5/1345C08K5/3475C08K3/26C08K5/29
Inventor 王晓群尹城龙黄珂伟陈家锋肖敏
Owner 杭州金州高分子科技有限公司
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