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Glass fiber-enhanced montmorillonite-modified nylon composite material with low water absorption and high dimensional stability and preparation method thereof

A nylon composite material and dimensional stability technology, which is applied in the field of modified nylon composite materials, can solve problems such as the decline in mechanical properties of dimensional stable materials, restrictions on the application of nylon materials, and high water absorption of nylon materials, achieving high dimensional stability, Effect of high crystallinity and low water absorption

Inactive Publication Date: 2017-12-15
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the amide group in the nylon molecular chain is easy to form hydrogen bonds with water molecules, the water absorption rate of the boiled nylon material is relatively large, and the size of the product changes greatly.
The dimensional stability and the mechanical properties of the material are significantly reduced, which seriously restricts the wider application of nylon materials

Method used

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  • Glass fiber-enhanced montmorillonite-modified nylon composite material with low water absorption and high dimensional stability and preparation method thereof
  • Glass fiber-enhanced montmorillonite-modified nylon composite material with low water absorption and high dimensional stability and preparation method thereof
  • Glass fiber-enhanced montmorillonite-modified nylon composite material with low water absorption and high dimensional stability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of montmorillonite-modified nylon composite: 95 parts by weight of nylon 6 (vacuum-dried at 100°C for 12 hours), 5 parts by weight of montmorillonite modified by cetyltrimethylammonium bromide, 0.1 part by weight of lubricant After pentaerythritol stearate, 0.05 parts by weight of antioxidant 1098 and 0.05 parts by weight of antioxidant 168 are placed in a high-speed mixer for premixing for 10 minutes, the mixture is added to the main feed port of the twin-screw extruder, and the screw speed is controlled at 450rpm , and the montmorillonite modified nylon compound is obtained after melt extrusion and granulation.

[0023] After 80 parts by weight of the above-mentioned montmorillonite-modified nylon compound, 0.1 part by weight of lubricant pentaerythritol stearate, 0.1 part by weight of antioxidant 1098 and 0.1 part by weight of antioxidant 168 were premixed in a high-speed mixer for 10 minutes, The main material port is added to the twin-screw extruder, an...

Embodiment 2

[0025] Preparation of montmorillonite-modified nylon composite: 98 parts by weight of nylon 6 (dried in vacuum at 100°C for 12 hours), 2 parts by weight of montmorillonite modified by hexadecyltributylphosphorus bromide, 0.5 parts by weight of lubricant Ethylene bis stearamide, 0.25 parts by weight of antioxidant 1098 and 0.25 parts by weight of antioxidant 168 are placed in a high-speed mixer for premixing for 10 minutes, and the main feed port of the mixture is added to the twin-screw extruder, and the screw speed is controlled. 450rpm, the montmorillonite modified nylon compound was obtained after melt extrusion and granulation.

[0026] 70 parts by weight of the above-mentioned montmorillonite-modified nylon compound, 0.15 parts by weight of lubricant ethylene bisstearamide, 0.125 parts by weight of antioxidant 1098 and 0.125 parts by weight of antioxidant 168 were placed in a high-speed mixer and premixed for 10 minutes. , added to the main feed port of the twin-screw ext...

Embodiment 3

[0028] Preparation of montmorillonite-modified nylon composite: 93 parts by weight of nylon 6 (dried in vacuum at 100°C for 12 hours), 7 parts by weight of montmorillonite modified by cetyltrimethylammonium bromide, 1 part by weight of lubricant silicon After the ketone masterbatch, 0.5 parts by weight of antioxidant 1098 and 0.5 parts by weight of antioxidant 168 were placed in a high-speed mixer for premixing for 10 minutes, the mixed material was added to the main material port of the twin-screw extruder, and the screw speed was controlled at 450 rpm. The montmorillonite modified nylon compound is obtained after melt extrusion and granulation.

[0029] Put 60 parts by weight of the above-mentioned montmorillonite-modified nylon compound, 0.2 parts by weight of silicone masterbatch, 0.15 parts by weight of antioxidant 1098 and 0.15 parts by weight of antioxidant 168 in a high-speed mixer for 10 minutes, then add the twin-screw The main feed port of the extruder, then 40 part...

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Abstract

The invention discloses a glass fiber-enhanced montmorillonite-modified nylon composite material with low water absorption and high dimensional stability and a preparation method thereof. Montmorillonite-modified nylon compound, lubricant and antioxidant are uniformly mixed and then added via the feed inlet of an extruder, glass fibers are added into the double-screw extruder via the side feed inlet, and after extrusion and pelleting, the glass fiber-enhanced montmorillonite-modified nylon composite material is obtained. With the organic montmorillonite-modified nylon prepared by a melt intercalation method as a matrix, the prepared glass fiber-enhanced montmorillonite-modified nylon composite material has higher degree of crystallinity, modulus and strength, higher dimensional stability and low water absorption in comparison with conventional glass fiber-enhanced nylon materials.

Description

technical field [0001] The invention relates to the technical field of modified nylon composite materials, in particular to a glass fiber reinforced montmorillonite modified nylon composite material with low water absorption and high dimensional stability and a preparation method thereof. Background technique [0002] Nylon, also known as polyamide, refers to the general term for thermoplastic resins containing repeated amide groups (-NHCO-) ​​on the main molecular chain. It has excellent mechanical properties, heat resistance, chemical resistance, wear resistance and self-lubricating properties in a wide temperature range, flame retardancy and easy processing. The filling of fillers such as glass fiber expands the application field of nylon materials. [0003] During the injection molding process of nylon, the rapid cooling will make the material unable to crystallize and shape naturally, so that there will be strong internal stress inside the material. After forming, the...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L77/06C08K13/06C08K9/04C08K3/34C08K7/14C08J5/04
Inventor 刘亮俞建姚为忠
Owner ORINKO NEW MATERIAL CO LTD
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