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Low-warpage heat-resistant nylon composition and preparation method thereof

A low warpage and composition technology, applied in the field of heat-resistant nylon composition and its preparation, can solve the problems of affecting assembly, warpage deformation, easy warpage deformation, etc., and achieves improved warpage deformation, low dent, excellent Effects of thermal stability and mechanical properties

Active Publication Date: 2015-06-10
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nylon material reinforced with glass fiber will warp and deform under high temperature conditions after injection molding into parts, especially for automobile assembly. , easy to warp and deform, affecting normal assembly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Dry nylon 66 resin at 85°C for 5 hours;

[0042] (2) Weigh 68 parts of nylon 66 dried in (1), 10 parts of poly-1,4-cyclohexanedimethyl terephthalate, 20 parts of glass fiber, 1.5 parts of heat-resistant additive H10, and 0.5 parts of lubricant Silicone oil, stir together in a high-speed mixer for 3 minutes;

[0043] (3) Then feed the uniformly mixed material into the feeding port of the twin-screw extruder, melt and extrude it, and granulate to obtain a heat-resistant nylon composition with low warpage;

[0044] Among them, the temperature of the first zone of the twin-screw extruder is 240°C, the temperature of the second zone is 250°C, the temperature of the third zone is 260°C, the temperature of the fourth zone is 275°C, the temperature of the fifth zone is 270°C, the temperature of the sixth zone is 270°C, and the temperature of the head is 275°C. The speed is 15HZ. The performance test results are shown in Table 1.

[0045]

Embodiment 2

[0047] (1) Dry nylon 66 resin at 90°C for 5 hours;

[0048] (2) Weigh 58.6 parts of dry nylon 66, 7 parts of poly-1,4-cyclohexanedimethyl terephthalate, 30 parts of glass fiber, 0.4 parts of heat-resistant additive H20, and toughening agent 3 parts of maleic anhydride grafted ethylene-octene copolymer, 0.5 part of lubricant fatty acid amide EBS, 0.5 part of color additive;

[0049] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 4 minutes;

[0050] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0051] (5) The material is melted and extruded by a twin-screw extruder, and granulated;

[0052] The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 270°C, the temperature of the second zone is 275°C, the temperature of the third zone is 285°C, the temperature of the fourth zone is 290°C, the temperature of ...

Embodiment 3

[0055] (1) Dry nylon 6 resin at 100°C for 4 hours;

[0056] (2) Weigh 47.8 parts of dry nylon 6, 5 parts of poly-1,4-cyclohexanedimethyl terephthalate, 40 parts of glass fiber, 0.7 parts of heat-resistant additive H3373, and toughening agent 5 parts of maleic anhydride grafted ethylene-propylene copolymer, 0.5 part of polyethylene wax lubricant A-C540A, 1 part of color additive;

[0057] (3) Stir the material weighed in the above step (2) in a high-speed mixer for 5 minutes;

[0058] (4) Then add the above-mentioned homogeneously mixed materials into the feeding port of the twin-screw extruder;

[0059] (5) The material is melted and extruded by a twin-screw extruder, and granulated;

[0060]The processing technology of the twin-screw extruder is as follows: the temperature of the first zone of the twin-screw extruder is 210°C, the temperature of the second zone is 220°C, the temperature of the third zone is 230°C, the temperature of the fourth zone is 240°C, the temperatur...

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Abstract

The invention discloses a low-warpage heat-resistant nylon composition and a preparation method thereof. The low-warpage heat-resistant nylon composition is prepared by the following steps: stirring 40-68 parts of nylon, 5-10 parts of poly-1,4-cyclohexane dimethylene terephthalate, 20-45 parts of glass fibers, 0-5 parts of a flexibilizer, 0.4-1.5 parts of a heat-resistant additive and 0.5-2 parts of processing aids in high-speed mixer for 3-5 minutes, performing melt extrusion on the mixture by virtue of a twin-screw extruder, and granulating to obtain the product. The low-warpage heat-resistant nylon composition disclosed by the invention has the balanced mechanical property and low warping property after high-temperature heat treatment, and the application range of the nylon material is widened.

Description

[0001] technical field [0002] The invention belongs to the field of polymer composite materials, and in particular relates to a heat-resistant nylon composition with low warpage after high-temperature heat treatment and a preparation method thereof. [0003] Background technique [0004] Nylon is the earliest developed engineering plastic, which has the advantages of high mechanical strength, good toughness, fatigue resistance, self-lubrication, small friction coefficient, wear resistance, heat resistance (long-term use within 100°C), and easy modification and molding. Good comprehensive performance and wide application. After nylon resin is reinforced with glass fiber, its strength can be increased several times, comparable to that of metal materials, and it is often used as various mechanical parts instead of metal materials. Glass fiber reinforced nylon is widely used in the periphery of automobile engines and other products that require high strength and certain heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08L67/02C08K13/04C08K7/14C08K3/32C08K5/17B29B9/06B29C47/92B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L77/02C08L77/06C08L2201/08C08L2205/03C08L2205/035C08L67/02C08L83/04C08K7/14C08L51/06C08L23/06C08L51/04C08L91/06C08L51/003
Inventor 杨桂生吴安琪
Owner HEFEI GENIUS NEW MATERIALS
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