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A kind of nylon 6 resin for food packaging material, its preparation method and its application

A food packaging and nylon technology, applied in the field of nylon 6 resin, can solve the problems of high caprolactam content, high price, low viscosity and difficult film formation, etc., and achieve the effects of improving polymerization efficiency, reducing product toxicity, and high repolymerization efficiency

Active Publication Date: 2017-09-05
HENGSHUI JINLUN PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the above special requirements, there are very few manufacturers of nylon 6 for biaxially oriented nylon films in China, and the quality is not satisfactory. Most of the nylon 6 for biaxially oriented nylon films depends on imports, and the price is expensive.
[0004] At present, the existing nylon 6 resin is difficult to be suitable for the processing and production of biaxially oriented nylon film, and cannot meet the safety and hygiene requirements. Its defects are: (1) low viscosity and difficult to form a film; (2) low strength and easy to tear; (3) The content of caprolactam is high, which cannot meet the hygienic standard; (4) Imported nylon 6 resin is expensive
The high-viscosity nylon 6 prepared by adopting this technical scheme certainly has an improved relative viscosity, but the spots cannot be eliminated when applied to the biaxially stretched nylon film, which affects the use and post-processing, and it is impossible to meet the standard of "Nylon 6 Resin for Food Packaging Materials" , and cannot be used in food packaging
[0007] In summary, the existing production technology of nylon 6 seriously restricts its application in food packaging materials and biaxially oriented nylon films, which affects the development of the industry. A nylon 6 suitable for food packaging materials and biaxially oriented nylon films has been found. very necessary

Method used

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  • A kind of nylon 6 resin for food packaging material, its preparation method and its application
  • A kind of nylon 6 resin for food packaging material, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0031] Table 1 Example 1-6 components and parts by weight

[0032]

[0033] The ordinary nylon 6 resin is selected from the Zhuangyuan brand nylon 6 resin produced by Sinopec Shijiazhuang Refining and Chemical Branch, with a relative viscosity of 2.75; 6 aminocaproic acid is produced by Shanghai Jianglai Biotechnology Co., Ltd.; the N, N'-ethylene bismuth Stearamide is N, N'-vinyl bis stearamide, which is a diffusing agent, produced in Malaysia and distributed by Tianjin Huanqi Chemical Co., Ltd.

preparation example 1-6

[0035] Preparation examples 1-6 adopt the raw materials and proportioning of embodiment 1-6 respectively, adopt the following steps to prepare:

[0036] Step ⑴: Mixing and drying, take the raw materials and the proportion, add them to the vacuum drum, use a vacuum pump to evacuate to a pressure of -0.098 ~ 0.1MPa, heat to 110°C, and keep the temperature for 2-3 hours; the main function is to The material is dry to ensure a higher rate of viscosity increase in the next stage.

[0037]Step ⑵: Constant temperature detection, within 4-6 hours, the temperature is raised to 174°C-205°C at a rate of 16°C / hour, and the temperature is kept constant for 6-12 hours. From 3.4 to 3.8, the temperature is lowered to 130°C, and the cooling rate is 11 to 19°C / hour.

[0038] Step ⑶: Vacuumize and fill with nitrogen, start the vacuum pump again to evacuate for 60-70 minutes to extract unpolymerized low-molecular substances, the vacuum degree is -0.095--0.1MPa, fill in nitrogen and cool down to ...

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Abstract

The invention relates to nylon 6 resin for food packaging materials. The nylon 6 resin comprises the following components in part by weight: 1000 parts of ordinary nylon 6 resin, 0.6-1 part of pentaerythritol stearate, 0.5-0.8 part of erucamide, 0.3-0.8 part of phosphoric acid, 1.5-2 parts of 6 aminocaproic acid and 0.4-0.6 part of N, N'-ethylene bis stearamide. The invention simultaneously provides a preparation method and an application of the nylon 6 resin. With the adoption of the technical scheme, the nylon 6 resin as well as the preparation method and the application thereof have the advantages of high uniformity and stability in extrusion, high transparency, small haze and no spot when a biaxially-oriented nylon film is post-processed, and the cost is greatly reduced compared with that of an imported similar product.

Description

technical field [0001] The invention relates to a nylon 6 resin used for food packaging materials, its preparation method and its application. Background technique [0002] In recent years, with the improvement of people's living standards and the packaging industry's requirements for films tend to be high-end, diversified, and performance-oriented, nylon 6 for food packaging materials is mainly used for the preparation of biaxially oriented nylon films, which has developed rapidly in my country. The biaxially oriented nylon film is made of nylon 6. The biaxially oriented nylon film has the following characteristics: excellent mechanical properties, wear and corrosion resistance, self-lubrication, high temperature resistance, and good oxygen barrier properties , puncture and tear resistance. BOPA film has higher strength than polyethylene film and biaxially oriented polypropylene film. Compared with EVOH film and PVDC film, it has the advantages of low cost and environmenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08K5/103C08K5/20C08K5/17C08G69/16B65D65/38
CPCB65D65/38C08G69/16C08K5/103C08K5/17C08K5/20C08K2201/014C08L2201/10C08L2203/16C08L77/02
Inventor 靳柱山
Owner HENGSHUI JINLUN PLASTIC
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