Unlock instant, AI-driven research and patent intelligence for your innovation.

Halogen-free flame-retardant PA66 composite material and preparation method thereof

A PA66, composite material technology, applied in the field of halogen-free flame retardant PA66 composite material and its preparation, can solve the problems of affecting mechanical properties, low flame retardant efficiency, toxic gases, etc., to improve mechanical properties, improve flame retardant efficiency, and easily The effect of adsorption

Pending Publication Date: 2021-12-28
YANGZHOU POLYTECHNIC INST
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a halogen-free flame-retardant PA66 composite material and its preparation method, which solve the problems of the existing PA66 composite material burning and releasing toxic gas, low flame-retardant efficiency, and affecting mechanical properties

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Halogen-free flame-retardant PA66 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] During preparation, first weigh the PA66 matrix, melamine cyanurate, graphene and multi-walled carbon nanotubes according to the proportion, add them to a high-speed mixer, mix for 1 hour, and send the above-mentioned mixed materials into a twin-screw extruder through a weight-loss metering feeder. During the extruder, adjust the feeding speed to 210-280r / min, and the screw temperature of each section of the twin-screw extruder from the feeding port to the machine head is 210°C, 260°C, 260°C, 260°C, 260°C, 250°C, 250°C, 250°C, 250°C, the screw speed is 220-320r / min, under the conveying and shearing action of the twin-screw extruder, fully melt and plasticize, knead and knead, extrude through the machine head, Stranding, cooling, pelletizing, and drying, the halogen-free flame-retardant PA66 is obtained.

[0019] The composition of raw materials was adjusted to prepare samples 1-4, and the composition of each raw material is shown in Table 1.

[0020] Table 1

[0021] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
limiting oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention relates to a halogen-free flame-retardant PA66 composite material and a preparation method thereof. The preparation method comprises the steps of conducting high-speed stirring and uniform mixing on 80-92% of dried PA66 resin, 6-15% of melamine cyanurate, 0.2-5% of graphene and 0.2-5% of multi-walled carbon nanotubes, performing extrusion and grain-sized dicing, and finally performing packaging to obtain the halogen-free flame-retardant PA66. The graphene and the multi-walled carbon nanotubes can effectively prevent combustible or toxic gas formed by polymer decomposition from overflowing and prevent external heat and oxygen from entering, and have excellent char forming property and excellent flame retardant effect, and meanwhile, the reinforcing effect of the carbon-based nanofiller improves the mechanical property; the halogen-free flame-retardant PA66 composite material not only has the advantages of high flame-retardant efficiency, no halogen, low smoke, low toxicity and dripping resistance, but also has excellent processability and can be widely applied; and the preparation method of the halogen-free flame-retardant PA66 material has the advantage of simple operation.

Description

technical field [0001] The invention relates to the technical field of flame-retardant composite materials, in particular to a halogen-free flame-retardant PA66 composite material and a preparation method thereof. Background technique [0002] Nylon 66 (PA66) is the most widely used thermoplastic resin in general engineering plastics. It has excellent mechanical properties and can be widely used in aviation, automobiles, machinery, electronics, chemicals, construction and other fields. The limiting oxygen index of PA66 is 24%, and the vertical combustion performance of UL-94 reaches V-2 level, which has certain flame retardant performance. However, with the continuous expansion of the application field of PA66, its flame retardant performance can no longer meet the increasingly stringent environmental requirements, and it is imperative to improve the flame retardant performance of PA66. [0003] The flame retardants currently used in PA6 mainly include halogen flame retarda...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K5/3492C08K3/04
CPCC08K5/34928C08K3/042C08K3/041C08K2201/011C08K2201/005C08L2201/02C08L2201/22C08L77/06
Inventor 田杰孙岳玲
Owner YANGZHOU POLYTECHNIC INST