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Forming method of continuous long fiber reinforced mc nylon sheet

A molding method and long fiber technology, applied in the field of materials, can solve the problems of insufficient comprehensive mechanical properties of fibers, long molding cycle, low filling amount, etc., and achieve the effects of low cost, continuous production, and high fiber filling amount

Active Publication Date: 2016-12-21
SUZHOU RONGCHANG COMPOUND MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the existing technology generally has disadvantages such as low filling amount, long molding cycle, and high cost when using MC nylon as a sheet, and at the same time, it fails to give full play to the advantages of high strength and high modulus of the fiber in terms of comprehensive mechanical properties.

Method used

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  • Forming method of continuous long fiber reinforced mc nylon sheet
  • Forming method of continuous long fiber reinforced mc nylon sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The steps of the forming method of the continuous long fiber reinforced MC nylon sheet in this embodiment are:

[0031] 1) Heat and melt the caprolactam monomer, vacuum dehydrate, add a basic catalyst to continue dehydration for 30 minutes, add an activator and mix evenly at 145°C;

[0032] 2) Coat the uniformly mixed material on the continuous long fiber, and then sequentially press, dry, cool and slice the coated continuous long fiber to obtain a continuous unidirectional long fiber reinforced MC nylon sheet. piece;

[0033] 3) Alternately stack the individual sheets according to their fiber directions so that the fibers between adjacent individual sheets are arranged perpendicular to each other, and then obtain continuous long fiber reinforced MC nylon sheets by pressure molding.

[0034]In this embodiment, step 2) before coating the uniformly mixed material on the continuous long fiber, also includes the step of preheating the continuous long fiber. By preheating t...

Embodiment 2

[0042] This example is basically the same as Example 1, except that the weight ratio of the basic catalyst (sodium hydroxide) added in step 1) to the caprolactam monomer is 0.5:100, and the activator added in step 2) is hexamethylene disulfide isocyanate.

[0043] The molding method of the present embodiment continuous long fiber reinforced MC nylon sheet uses the processing steps of the aforementioned continuous long fiber reinforced MC nylon sheet molding device as follows:

[0044] (1) Put 100 parts by weight of caprolactam in a vacuum reactor 11 and heat it to 130°C, vacuum dehydrate for 30 minutes, and keep the vacuum degree at 10 -3 Pa (Pa: handkerchief), add the sodium hydroxide of 0.5 weight part as catalyzer, continue vacuum dehydration 30 minutes; Open the valve of vacuum reactor 11, material is placed in the first storage tank 12 in vacuum reactor 11, and in Keep warm at 145°C; the activator HDI (hexamethylene diisocyanate) is placed in the second storage tank 13; ...

Embodiment 3

[0048] This example is basically the same as Example 1, except that the weight ratio of the basic catalyst (sodium hydroxide) added in step 1) to the caprolactam monomer is 1:100.

[0049] The molding method of the present embodiment continuous long fiber reinforced MC nylon sheet uses the processing steps of the aforementioned continuous long fiber reinforced MC nylon sheet molding device as follows:

[0050] (1) Put 100 parts by weight of caprolactam in a vacuum reactor 11 and heat it to 130°C, vacuum dehydrate for 30 minutes, and keep the vacuum degree at 10 -3 Pa (Pa: handkerchief), add the sodium hydroxide of 1 weight part as catalyzer, continue vacuum dehydration 30 minutes; Open the valve of vacuum reactor 11, material is placed in the first storage tank 12 in vacuum reactor 11, and in Insulation at 145°C; the activator TDI (toluene diisocyanate) is placed in the second storage tank 13; according to the weight ratio of the activator to the caprolactam monomer of 0.1:100...

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Abstract

The invention discloses a method and a device for forming a continuous long fiber reinforced MC nylon plate material. The method comprises the following steps: heating and melting a caprolactam monomer, dehydrating in vacuum, adding an alkaline catalyst and an activating agent, uniformly mixing, coating the uniformly-mixed material on continuous long fibers, then orderly pressing, drying, cooling and slicing to obtain mono-sheets of a continuous unidirectional long fiber reinforced MC nylon sheet material, orderly and alternately stacking and flatly laying the mono-sheets according to the fiber direction of the mono-sheets so that the fibers between adjacent mono-sheets are arranged in a manner of being vertical to one another, and then performing a pressure forming process to obtain the continuous long fiber reinforced MC nylon plate material. The device comprises an MC nylon synthesis coating discharging module, a fiber yarn arranging module, a sheet forming rolling module and a pressure forming module, wherein the fiber yarn arranging module, the sheet forming rolling module and the pressure forming module are arranged in sequence. The method and the device disclosed by the invention have the advantages of high fiber loading level, good comprehensive performance, continuous production and low cost.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for forming continuous long fiber reinforced MC nylon plates. Background technique [0002] Monomer cast nylon (MC nylon) is a new type of engineering plastic developed in the early 1960s by applying the new technology of caprolactam anionic polymerization. MC nylon has the characteristics of low polymerization temperature, high crystallinity, large molecular weight, higher mechanical strength than ordinary nylon, wear resistance, and wide service temperature range. Its preparation method is to melt the caprolactam, add a strong alkaline substance as a catalyst for dehydration, mix it with an activator evenly, and directly inject it into a preheated mold for polymerization. With the further expansion of the application range of MC nylon, especially the use of MC nylon as a plate, higher requirements are put forward for its comprehensive mechanical properties, which are generall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/20B29C70/50B29C70/54B29L7/00
Inventor 资玉明朱正华黄仁军刘春林王海利
Owner SUZHOU RONGCHANG COMPOUND MATERIAL