Application of a polyester amide as a high temperature resistant heat shrinkable film

A heat-shrinkable film and polyester amide technology, which is applied in the application field of polyester amide as a heat-shrinkable film, can solve the problems of poor heat resistance of heat-shrinkable films and achieve the effect of shrinkage performance

Active Publication Date: 2022-05-20
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the heat shrinkable film in the prior art has poor heat resistance

Method used

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  • Application of a polyester amide as a high temperature resistant heat shrinkable film
  • Application of a polyester amide as a high temperature resistant heat shrinkable film
  • Application of a polyester amide as a high temperature resistant heat shrinkable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The preparation of heat-shrinkable film 1 specifically comprises the following steps:

[0048] Take 22.4g of tall oil-based dimer acid, 3.4g of 1,3-diamino-2-propanol, and 40mg of sodium phosphite into a three-necked flask, mix them uniformly with a mechanical stirrer under a nitrogen atmosphere at 80°C and heat them for 1 hour, then raise the temperature to 140 °C for 12 hours, then raised the temperature to 180 °C for 6 hours, then raised the temperature to 230 °C for 2 hours, and finally cooled the reaction system to 140 °C. After the reaction, the product was named polyester amide 1.

[0049] The polyester amide 1 was subjected to sheeting and uniaxial stretching, the stretching speed was 10 mm / min, the stretching strain was 150%, and the stretched product was named heat-shrinkable film 1.

Embodiment 2

[0051] The preparation of heat-shrinkable film 2 specifically comprises the following steps:

[0052]Take 20.8g of tall oil-based dimer acid, 3.4g of 1,3 diamino-2-propanol, and 40mg of sodium phosphite into a three-necked flask, mix them uniformly with a mechanical stirrer under a nitrogen atmosphere at 80°C and heat them for 1 hour, then raise the temperature to 140 °C for 12 hours, then raised the temperature to 180 °C for 6 hours, then raised the temperature to 230 °C for 2 hours, and finally cooled the reaction system to 140 °C. After the reaction, the product was named polyester amide 2.

[0053] The polyester amide 2 was subjected to sheeting and uniaxial stretching, the stretching speed was 10 mm / min, the stretching strain was 150%, and the stretched product was named heat-shrinkable film 2.

Embodiment 3

[0055] The preparation of heat-shrinkable film 3 specifically comprises the following steps:

[0056] Take 19.2g of tall oil-based dimer acid, 3.4g of 1,3 diamino-2-propanol, and 40mg of sodium phosphite into a three-necked flask, mix them uniformly with a mechanical stirrer under a nitrogen atmosphere at 80°C and heat for 1 hour, then raise the temperature to 140 °C for 12 hours, then raised the temperature to 180 °C for 6 hours, then raised the temperature to 230 °C for 2 hours, and finally cooled the reaction system to 140 °C. After the reaction, the product was named polyester amide 3.

[0057] The polyester amide 3 was subjected to sheeting and uniaxial stretching, the stretching speed was 10 mm / min, the stretching strain was 150%, and the stretched product was named heat-shrinkable film 3 . Such as figure 1 Shown: After the raw material tall oil-based dimer acid of the present invention is reacted according to Example 1, the carboxyl peak basically disappears, and the p...

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Abstract

The invention discloses the application of a polyester amide as a heat-shrinkable film, and relates to the technical field of polymer materials. The polyester amide is subjected to sheeting and uniaxial stretching. The preparation method of the polyester amide includes the following steps: (1) 30 ~200 parts by weight of liquid dicarboxylic acid and 15~95 parts by weight of diamine compound containing β hydroxyl group are heated and dissolved and stirred evenly to form a reaction solution; (2) Add 0.05~0.5 parts by weight of catalyst, and heat to 65~ React at 100°C for 1-6 hours; (3) Heat the reaction solution to 100-180°C for 3-18 hours; (4) Heat the reaction solution to 180-240°C for 0.5-4 hours; (5) Heat the reaction solution The temperature of the reaction system is lowered to 100-180°C to obtain polyester amide. The invention has the advantages that the polyester amide heat shrinkable film can not only replace the PET heat shrinkable film, but also does not melt even at a high temperature of 300°C.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to the application of a polyester amide as a heat-shrinkable film. Background technique [0002] In life, plastics are used in all aspects of daily life. Common plastics use synthetic resin as the main component, and then add auxiliary materials such as plasticizers, fillers, lubricants or colorants to form plastic materials with certain characteristics. In modern society, various products of clothing, food, housing and transportation are packaged with plastic films, so that the products can achieve various functions of beauty, dust protection and sealing. But there are also many weaknesses in plastic films, such as poor temperature resistance, easy to crack or be torn, etc. [0003] In the early 1950s, British scientist Arthur discovered that polyethylene (PE) could be turned into a heat-shrinkable material with a special "memory effect" after being processed by irradia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L77/12C08G69/44B29C55/04
CPCC08J5/18C08G69/44B29C55/04C08J2377/12Y02E60/10
Inventor 汪钟凯丁永良刘成
Owner ANHUI AGRICULTURAL UNIVERSITY
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