In-situ microfiber reinforced MC nylon composite material preparation method

A nylon composite material, in-situ microfiber technology

Inactive Publication Date: 2018-12-21
江苏利德尔新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polarity of PA6 and PP is very different, and the mechanical properties of the composite prepared by direct blending are very poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method for preparing PP / PA6 in-situ microfibrillation composite material provided by the present invention is carried out according to the following process steps and conditions:

[0027] (1) Put caprolactam (CL) into melting pot A, raise the temperature to 127°C, set the pressure to normal pressure, and melt it;

[0028] (2) Add the auxiliary material catalyst sodium hydroxide (NaOH) into the melt kettle A, and carry out vacuum dehydration of the molten raw materials in the negative pressure dehydration system, set the dehydration temperature to 127°C, and the dehydration (absolute) pressure to be less than 5mmHg;

[0029] (3) Add the auxiliary material curing agent toluene-2,4-diisocyanate (TDI) into the melt kettle A, continue vacuum dehydration in the negative pressure dehydration system, set the dehydration temperature to 127°C, and the dehydration (absolute) pressure is less than 5mmHg;

[0030] (4) Start the nitrogen charging switch, input the ra...

Embodiment 2

[0038] The preparation method for preparing PP / PA6 in-situ microfibrillation composite material provided by the present invention is carried out according to the following process steps and conditions:

[0039] (1) Put caprolactam (CL) into melting pot A, raise the temperature to 120°C, set the pressure to normal pressure, and melt it;

[0040] (2) Add the auxiliary material catalyst sodium hydroxide (NaOH) into the melt kettle A, and carry out vacuum dehydration of the molten raw materials in the negative pressure dehydration system, set the dehydration temperature to 120°C, and the dehydration (absolute) pressure to be less than 5mmHg;

[0041] (3) Add the auxiliary material curing agent toluene-2,4-diisocyanate (TDI) into the melt kettle A, continue vacuum dehydration in the negative pressure dehydration system, set the dehydration temperature to 120°C, and the dehydration (absolute) pressure is less than 5mmHg;

[0042] (4) Start the nitrogen charging switch, input the ra...

Embodiment 3

[0050] The preparation method for preparing PP / PA6 in-situ microfibrillation composite material provided by the present invention is carried out according to the following process steps and conditions:

[0051] (1) Put caprolactam (CL) into melting pot A, raise the temperature to 135°C, set the pressure to normal pressure, and melt it;

[0052] (2) Add the auxiliary material catalyst sodium hydroxide (NaOH) into the melt kettle A, and carry out vacuum dehydration of the molten raw materials in the negative pressure dehydration system, set the dehydration temperature to 135°C, and the dehydration (absolute) pressure to be less than 5mmHg;

[0053] (3) Add the auxiliary material curing agent toluene-2,4-diisocyanate (TDI) into the melt kettle A, continue vacuum dehydration in the negative pressure dehydration system, set the dehydration temperature to 135 ° C, and the dehydration (absolute) pressure is less than 5mmHg;

[0054] (4) Start the nitrogen charging switch, input the ...

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PUM

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Abstract

The invention discloses an in-situ microfiber reinforced MC nylon composite material preparation method. According to the preparation method disclosed, isocyanate is utilized as a compatibilizer to solve the problem that polypropylene and nylon 6 are incompatible; by means of using the compatibilizer, in-site polymerization and in-situ fiber formation in a blend system can be synchronously finished, a technological process is shortened, the grafting percent of the compatibilizer is improved, and a copolymerization degree of the polypropylene and the nylon 6 system is improved. A and B tanks and a one-step multi-kettle serial continuous production technology are utilized to prepare an in-situ microfiber reinforced composite material, online automatic control on technological parameters is achieved, the production efficiency of the nylon composite material is improved, and raw material loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of an in-situ microfiber-reinforced MC nylon composite material. Background technique [0002] Composite materials based on thermoplastic resins have been widely used. In the preparation of high-performance engineering plastics, fiber reinforcement is a very common modification method. The main materials used are glass fibers, carbon fibers, polyester fibers, and aromatic fibers. Inorganic or organic macro-fibers such as nylon fibers, these fibers can have a significant reinforcing effect when filled into the resin matrix, but the processing viscosity of the composite material will increase sharply, and at the same time, the wear on the processing machinery will be increased. In 1975, Capiati et al. proposed the concept of "single polymer composite" for the first time in the research of high-density polyethylene (HDPE) filament and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02
CPCC08G81/028
Inventor 朱海霞沈国春邵自强胡国华张超
Owner 江苏利德尔新材料科技有限公司
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