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Formula and preparation method of composite low melting point nylon 6

A low-melting-point nylon technology, which is applied in the formulation and preparation of composite low-melting-point nylon 6, can solve problems such as the decrease in the added value of the mechanical properties of low-melting-point PA6 and the decrease in the dispersion effect of organic montmorillonite, and achieve low production costs and easy use. The effect is ideal and the effect of improving mechanical properties

Inactive Publication Date: 2011-12-21
国家复合改性聚合物材料工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the amount of organic montmorillonite added is small, the mechanical properties of low melting point PA6 are greatly improved. When the content of organic montmorillonite is high, the increase value of the mechanical properties of low melting point PA6 decreases instead. This is because the dispersion effect of organic montmorillonite in PA6 with low melting point also decreases with the increase of organic montmorillonite content.

Method used

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  • Formula and preparation method of composite low melting point nylon 6
  • Formula and preparation method of composite low melting point nylon 6
  • Formula and preparation method of composite low melting point nylon 6

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Embodiment 1

[0027] Embodiment 1 of the present invention: Preparation of composite low-melting nylon 6, calculated in parts by weight, first drying 90 parts of nylon 6 in a blast drying oven at 90°C for 12 hours, and drying 10 parts of organic montmorillonite at 80°C Dry in a blast drying oven for 24 hours, blend them and extrude through a twin-screw extruder, and then cut the extruded material into pellets; pre-dry 5 parts of anhydrous calcium chloride at 120 °C by blast drying Dry in the oven for 8 hours, then blend the obtained pellets with the anhydrous calcium chloride, extrude and cool through a twin-screw extruder, and then pelletize to obtain a finished product. In the production process, the screw speed of the twin-screw extruder is 210rpm, and the speed of the feeding screw is 15rpm. The temperature zone 1, temperature zone 2, temperature zone 3, temperature zone 4, temperature zone 5, temperature zone 6, There are seven temperature zones, eight temperature zones, and the temper...

Embodiment 2

[0028] Embodiment 2 of the present invention: preparation of composite low-melting nylon 6, calculated in parts by weight, first dry 92 parts of nylon 6 in a blast drying oven at 90°C for 12 hours, and mix 8 parts of organic montmorillonite at 80 ℃ in a blast drying oven for 24 hours, extrude their blends through a twin-screw extruder, and then pelletize the extruded materials; pre-dry 5.2 parts of anhydrous calcium chloride at 120 ℃ Dry in an air drying oven for 8 hours, then blend the obtained pellets with the anhydrous calcium chloride, extrude and cool through a twin-screw extruder, and then granulate to obtain a finished product. In the production process, the screw speed of the twin-screw extruder is 210 rpm, and the speed of the feeding screw is 15 rpm. The temperature is in the first zone, the second zone, the third zone, the fourth zone, the fifth zone, and the sixth zone. , seven temperature zones, eight temperature zones, the head temperature is 180°C, 190°C, 205°C,...

Embodiment 3

[0029] Embodiment 3 of the present invention: preparation of composite low-melting nylon 6, calculated in parts by weight, first dry 94 parts of nylon 6 in a blast drying oven at 90°C for 12 hours, and mix 6 parts of organic montmorillonite at 80 °C in a blast drying oven for 24 hours, extrude their blends through a twin-screw extruder, and then cut the extruded materials into pellets; blow 5.6 parts of anhydrous calcium chloride in advance at 120 °C Dry in an air drying oven for 8 hours, then blend the obtained pellets with the anhydrous calcium chloride, extrude and cool through a twin-screw extruder, and then granulate to obtain a finished product. In the production process, the screw speed of the twin-screw extruder is 210 rpm, and the speed of the feeding screw is 15 rpm. The temperature is in the first zone, the second zone, the third zone, the fourth zone, the fifth zone, and the sixth zone. , seven temperature zones, eight temperature zones, the head temperature is 180...

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Abstract

The invention discloses a formula of composite low-melting-point nylon 6, comprising the following components in part by weight: 90-98 parts of nylon 6, 5-6 parts of anhydrous calcium chloride and 2-10 parts of organic montmorillonite. In the invention, the mode of firstly blending the nylon 6 and the organic montmorillonite for extrusion and granulation and then blending the obtained mixture with the anhydrous calcium chloride for extrusion and granulation to manufacture the low-melting-point nylon 6 is adopted, and the problem that calcium ions react with silicate in the organic montmorillonite to inhibit the dispersion of the organic montmorillonite in the low-melting-point nylon 6 is solved, so that the organic montmorillonite can be fully dispersed in the low-melting-point nylon 6, and further the mechanical property of the low-melting-point nylon 6 is improved. In addition, the invention is simple and is easy to implement, the production cost is low, and the service effect is ideal.

Description

technical field [0001] The invention relates to a plastic formula and a preparation method, in particular to a compound low melting point nylon 6 formula and a preparation method. Background technique [0002] Nylon 6 (PA6) is a semi-crystalline polymer. There are strong hydrogen bonds between molecular chains, which cannot be completely eliminated even in the molten state. This is why PA6 has crystallinity, good chemical stability, and stable mechanical properties. determinant of performance. The adjacent macromolecular chains in the PA6 unit cell are connected by hydrogen bonds. Due to different combinations of hydrogen bonds, different spherulite structures are produced. PA6 has a variety of crystal structures, among which the more stable crystal forms are α and γ. type. The α-type crystal form is a monoclinic crystal system, the molecular chain of the crystal region is an antiparallel structure, and the molecular chain is fully extended, the methylene segment and the a...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K13/06C08K9/04C08K3/34C08K3/16B29B9/06
Inventor 于杰王丽娥鲁圣军何敏秦舒浩张敏敏
Owner 国家复合改性聚合物材料工程技术研究中心
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