High-surface-energy long-carbon-chain polyamide transparent film, as well as preparation method and application thereof

A long carbon chain polyamide and carbon chain polyamide technology, which is applied in the field of high surface energy long carbon chain polyamide transparent film and preparation, can solve the problems of high amide group density, which has not been seen, and reduce the water absorption of materials. Achieve the effect of simple preparation process

Active Publication Date: 2017-09-15
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amide group density of ordinary polyamide is very large, which has great water absorption, poor dimensional stability, and increased shrinkage.
[0009] Compared with ordinary polyamides, long carbon chain polyamides contain longer methylene chains, which not only have stronger hydrogen bonding, but also increase the flexibility of molecular chains due to the decrease in the density of amide groups, which greatly reduces the material's flexibility. Water absorption. Therefore, in addition to the strong and tough characteristics of ordinary polyamides, long carbon chain polyamides also have better dimensional stability, gas barrier and oil resistance than ordinary polyamides. They can be used in oil at 100 °C for a long time. The temperature of long-term use in inert gas is 110°C and it is safe to use. In addition, it has good molding and processing properties, overcomes the limitations of general polyamide plastic films in the application field, and meets its performance requirements in applications. So far, there are no related patents and reports on the preparation of high surface energy transparent printing films with long carbon chain polyamides

Method used

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  • High-surface-energy long-carbon-chain polyamide transparent film, as well as preparation method and application thereof
  • High-surface-energy long-carbon-chain polyamide transparent film, as well as preparation method and application thereof
  • High-surface-energy long-carbon-chain polyamide transparent film, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) The pellets comprising raw material PA612 and chain extender (0.5%) are dried in a vacuum oven;

[0064] (2) The pellets are first extruded through twin-screw plasticization, the melting point of PA612 is 220°C, and the melt index is 20g / 10min, and then the tubular film blank is formed through the die, the first barrel of the extruder, the second barrel, and the mold The temperature of the first zone and the second zone of the mold is 220°C, 240°C, 260°C, 300°C respectively, and the screw speed is 10rpm. The obtained tubular film blank is blown by compressed air under the state of melt flow, and the diameter of the blown film bubble is 200mm;

[0065] (3) pulling and winding the film blown out in step (2), the pulling speed of the pulling machine is 10rpm, and the winding speed of the winder is 10rpm, and it is cooled and shaped to obtain final product.

[0066] The prepared high surface energy long carbon chain polyamide transparent film has a film thickness of 50...

Embodiment 2

[0068] (1) drying the pellets of the PA1212 / PP alloy in a vacuum oven;

[0069] (2) The pellets are first extruded through twin-screw plasticization, the melting point of PA1212 is 180°C, the melting point of PP is 163°C, and the melt index is 20g / 10min, and then the tubular film blank is formed through the die. The temperature of the second zone of the barrel, the first zone of the mold, and the second zone of the mold are respectively 200°C, 220°C, 240°C, and 240°C, and the screw speed is 20rpm. The obtained tubular film blank is blown by compressed air under the state of melt flow , the blown film bubble diameter is 50mm;

[0070] (3) pulling and winding the film blown out in step (2), the pulling speed of the pulling machine is 20rpm, and the winding speed of the winder is 20rpm, and it is cooled and shaped to obtain final product.

[0071] The prepared high surface energy long carbon chain polyamide transparent film has a film thickness of 100 μm, a measured surface tens...

Embodiment 3

[0073] (1) drying the pellets of PA1010 / glass fiber alloy in a vacuum oven;

[0074](2) The pellets are first extruded through twin-screw plasticization, the melting point of PA1010 is 190°C, the melting point of glass fiber is 680°C, and the melt index is 15g / 10min, and then the tubular film blank is formed through the die, and the first barrel of the extruder The temperature of the second zone of the barrel, the first zone of the mold, and the second zone of the mold are respectively 220°C, 270°C, 270°C, and 270°C, and the screw speed is 100rpm. Inflation, blown film bubble diameter is 2000mm;

[0075] (3) Towing and winding the film blown out in step (2), the pulling speed of the tractor is 100rpm, and the winding speed of the winder is 100rpm, and it is cooled and shaped to obtain final product.

[0076] The prepared high surface energy long carbon chain polyamide transparent film has a film thickness of 10 μm, a measured surface tension of 45 mN / m, and a light transmitta...

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Abstract

The invention belongs to the technical field of packaging materials, and particularly relates to a high-surface-energy long-carbon-chain polyamide transparent film, as well as a preparation method and an application thereof. The high-surface-energy long-carbon-chain polyamide transparent film is prepared from raw materials including long-carbon-chain polyamide material, wherein the long-carbon-chain polyamide is polyamide having the number of methylene between adjacent amide groups on the main chain being more than or equal to 10, and the surface tension of the high-surface-energy long-carbon-chain polyamide transparent film is 32-45mN/m; and the long-carbon-chain polyamide material is one or more of long-carbon-chain polyamide, additive-containing long-carbon-chain polyamide, long-carbon-chain polyamide alloy or long-carbon-chain polyamide nano-composite material. The high-surface-energy long-carbon-chain polyamide transparent film has the advantages of excellent mechanical performance, good size stability, good oil resistance and good gas barrier property, shows good printing performance under the condition that corona and other surface treatment means are not adopted, has excellent transparent property, and has a wide market prospect in packaging and printing technical fields.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a high surface energy long carbon chain polyamide transparent film, a preparation method and application. Background technique [0002] With the continuous development of society, packaging plastic films are widely used in the fields of medicine, chemical industry and food, especially in food packaging, people have higher and higher requirements for the modification of the surface of various packaging films. The requirements are also getting higher and higher. Printing on plastic films involves extremely complex physical and chemical processes, which are affected by factors such as the surface properties of plastic films, printing inks, and printing methods. Usually, these factors affect printing performance by changing and controlling the surface tension of plastic films. [0003] When the ink has just been applied to the surface of the plastic film, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L23/12C08K7/14C08J5/18B29C69/00B29C55/28B29C43/24B29C43/58B29C41/26B29C41/52B29C47/92B29L7/00B29C48/92
CPCB29C41/26B29C41/52B29C43/245B29C48/001B29C48/0011B29C48/0018B29C48/92B29C55/28B29C2043/5816B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895B29C2948/92904B29L2007/00C08J5/18C08J2323/12C08J2377/06C08J2477/06C08K7/14C08L23/12C08L77/06C08L2201/10C08L2203/16
Inventor 董侠李璇王莉莉赵莹刘学新王笃金
Owner INST OF CHEM CHINESE ACAD OF SCI
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