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Biodegradable film based on irradiation modification and preparing method thereof

A technology for degrading films and film products, which is applied in the field of radiation-modified biodegradable films and their preparation, can solve the problems of long-term performance, weak anti-aging ability, and easy-to-crack performance, so as to relieve environmental pressure, Increased melt viscosity and reduced cracking effects

Inactive Publication Date: 2015-11-11
SHANGHAI HONGRUI CHEM PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although degradable materials have been used in the film field to a certain extent, their performance on the film cannot be maintained for a long time, they are easy to break, and are limited by insufficient performance (such as poor barrier properties, weak anti-aging ability, etc.) and high material costs. Wider range of applications requires modification

Method used

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  • Biodegradable film based on irradiation modification and preparing method thereof
  • Biodegradable film based on irradiation modification and preparing method thereof
  • Biodegradable film based on irradiation modification and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 provides a biodegradable film based on irradiation modification and a preparation method thereof, the components and contents of the biodegradable film are shown in Table 1 below; the preparation method specifically includes:

[0042] Raw material pretreatment: take the biodegradable material that has been vacuum-dried at 30°C for 10 hours, mix it according to the ratio of Example 1 in Table 1, stir at 600r / min at room temperature, and stir at high speed for 3 minutes;

[0043] Extrusion granulation: twin-screw extruder melt blending, extrusion granulation, extrusion temperature is 100-135 °C, die temperature of screw extruder is 120-200 °C, screw length-to-diameter ratio is 40:1 , speed 250r / min;

[0044] Processing and molding: vacuum drying at 30°C for 12 hours, blow molding at 110-130°C;

[0045] Irradiation treatment: The film was irradiated with 220kGy electron beams to prepare a biodegradable film (sample number 1).

Embodiment 2

[0047] This embodiment provides a biodegradable film based on irradiation modification and its preparation method. The components and contents of the biodegradable film are shown in Table 1 below; the preparation method specifically includes:

[0048] Raw material pretreatment: Take the biodegradable material that has been vacuum-dried at 80°C for 2 hours, mix it according to the ratio of Example 2 in Table 1, and stir at 800r / min at a high speed for 3 minutes at room temperature;

[0049] Extrusion granulation: twin-screw extruder melt blending, extrusion granulation, extrusion temperature is 110-180 °C, die temperature of screw extruder is 120-200 °C, screw length-to-diameter ratio is 40:1 , speed 150r / min;

[0050] Processing and molding: vacuum drying at 80°C for 4 hours, blow molding at 135-170°C;

[0051] Irradiation treatment: The film was irradiated with 160kGy electron beams to prepare a biodegradable film (sample number 2).

Embodiment 3

[0053] This embodiment provides a biodegradable film based on irradiation modification and its preparation method; the components and contents of the biodegradable film are shown in Table 1 below; the preparation method specifically includes:

[0054] Raw material pretreatment: take the biodegradable material that has been vacuum-dried at 60°C for 6 hours, mix it according to the ratio of Example 3 in Table 1, and stir at a high speed of 1000r / min for 3 minutes at room temperature;

[0055] Extrusion granulation: twin-screw extruder melt blending, extrusion granulation, extrusion temperature is 110-190 ℃, die temperature of screw extruder is 120-200 ℃, screw length-to-diameter ratio is 40:1 , speed 150r / min;

[0056] Processing and molding: vacuum drying at 80°C for 10 hours, blowing and casting at 160-190°C to form a film;

[0057] Irradiation treatment: The film was irradiated with 60kGy electron beams to prepare a biodegradable film (sample number 3).

[0058] Table 1

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Abstract

The invention discloses a biodegradable film based on irradiation modification and a preparing method thereof. The degradable film is composed of, by weight, 100 parts of biodegradable materials, 0-5 parts of compatilizer, 0.05-5 parts of irradiation sensitizing agents, 0.05-3 parts of antioxidants, 0.1-2 parts of light stabilizer, 0.1-3 parts of anti-ultraviolet agents and 0-2 parts of lubricating agents in a mixed mode. Compared with the prior art, the biodegradable film has the following advantages of having excellent mechanical strength, barrier performance, ageing resistance and the like, and being innovative, and application of the biodegradable film is expanded; the composite film keeps complete biodegradable performance, and has high application potentiality in medical science and environmental science, the composite film can replace petroleum-base general films to be used greatly, and environmental pressure is relieved. The preparing method is simple and easy to implement, the addition quantity of all the auxiliaries is small, cost is low, and the production process is controllable.

Description

technical field [0001] The invention belongs to the field of irradiation modification of biodegradable composite materials and the field of environmental science and technology, and specifically relates to a biodegradable film based on irradiation modification and a preparation method thereof. Background technique [0002] Due to the increasingly serious global environmental pollution caused by petroleum-based plastics, biodegradable plastics with renewable, low-carbon, and environmentally friendly features have become the main development trend of the polymer material industry such as temperature, PH value, and oxygen. [0003] Biodegradable materials are degraded or decomposed by chemical, biological or physical actions under a certain environment (such as temperature, PH value and oxygen) and under the action of natural microorganisms such as bacteria, fungi, molds and algae, and finally completely Materials that become carbon dioxide, methane, water, inorganic salts and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08K5/00C08K5/524C08K5/3435C08K5/5399C08K5/134C08K5/132C08J7/12
Inventor 徐友利张伟阳
Owner SHANGHAI HONGRUI CHEM PROD CO LTD
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