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Quickly demolding nylon-66 resin and its prepn

A technology of nylon and resin, which is applied in the field of quick release nylon 66 resin and its preparation, can solve the problems of poor release performance, etc., and achieve the effects of improved surface performance, increased yield, and improved release performance

Inactive Publication Date: 2004-09-08
CHINA SHENMA GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of poor release performance of nylon 66 in the processing and molding process at present, the purpose of the present invention is to provide a quick release nylon 66 resin with good release performance and excellent comprehensive performance and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dry nylon 66 slices with the model EPR27 and a relative viscosity of 2.5 under nitrogen protection at 100°C for 18 hours, or at 90°C for 24 hours in vacuum to obtain dry nylon 66 resin, marked as D 0 ; Test the dropping point of the internal release agent.

[0029] Heat the high-speed kneader to 3-10°C above the dropping point of the internal release agent, add resin D 0 , fully wet the surface with a small amount of absolute ethanol, add 4 kinds of internal release agents according to the formula, and then stir rapidly for 5 to 10 minutes to obtain nylon 66 resins with internal release agents on the surface, which are respectively marked as D 1 ~D 4 .

[0030] Nylon 66 resin with internal release agent on the surface was injection molded with an injection machine to obtain test strips for testing mechanical properties.

[0031] The demoulding cycle of the prepared sample is shortened, the surface performance of the injection molding preparation is significantly impr...

Embodiment 2

[0052] In the process of discharging nylon 66 from the polymerization kettle, cutting into pellets and blowing and drying under the protection of nitrogen, the internal release agent is added according to the formula, so that it is fully mixed with the nylon 66 resin, and the nylon with the internal release agent on the surface is obtained. 66 resin, marked D N .

[0053] Nylon 66 resin with internal release agent on the surface was injection molded with an injection machine to obtain test strips for testing mechanical properties. Measure its tensile, bending and impact properties, and the data are shown in Table 3. The table is based on the standards of tensile test GB / T1042-92, bending test GB / T9341-88, impact test standard GB / T1843-1996.

[0054] It can be seen that after adding the internal release agent, the tensile strength and flexural strength of the nylon 66 sample increased slightly, and the flexural modulus decreased slightly; but the impact strength, elastic modu...

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PUM

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Abstract

The present invention provides one kind of quickly demolding nylon-66 resin and its preparation process. The main material includes nylon-66 slices and internal demolding agent. The preparation process of the quickly demolding nylon-66 resin includes blowing drying or vacuum drying of nylon-66 slices under protection of nitrogen, measuring the dropping point of internal demolding agent, heating the kneading machine to temperature 3-10 deg.c over the dropping point, adding nylon slices with surface moistened with anhydride alcohol via fast stirring to obtain nylone-66 resin with surface attached with internal demolding agent. Or, the internal demolding agent is added into nylon-66 slices under nitrogen protection in the drysing process, so that it is mixed with nylon-66 fully to obtain nylone-66 resin with surface attached with internal demolding agent. The resultant nylone-66 resin has raised demolding performance, etc.

Description

Technical field: [0001] The present invention relates to a new type of nylon 66 resin - quick release nylon 66 resin and its preparation method. In particular, it relates to a quick-release nylon 66 resin made of nylon 66 and an internal release agent and a preparation method thereof. Background technique: [0002] Nylon 66 was developed by Du Pont Company in 1935 and realized industrialization in 1939. It is one of the engineering plastics with the largest output and widest application in the world, and it is also the nylon variety with the largest output in Henan Province. Nylon 66 has excellent mechanical properties, wear resistance, self-lubrication, corrosion resistance, and good formability. It has been growing steadily in replacing traditional metal structural materials. It is widely used in automotive parts, mechanical parts, electronic appliances, adhesives and packaging. Materials and other fields have been widely used. However, nylon 66 still has many deficienci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/00C08J7/00
Inventor 朱诚身何素芹吕励耘李鹏洲郭建国陈红
Owner CHINA SHENMA GROUP