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Biodegradable film and preparation method thereof

A biodegradable and thin film technology, applied in the field of biodegradable thin films and their preparation, achieves the effects of simple process, easy control and high tensile strength

Inactive Publication Date: 2010-06-30
林存革
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the product has been industrialized, it is still immature. In the process of continuously improving the performance-price ratio, improving performance (including molding performance, use performance, and controllable degradation performance), reducing costs and expanding the market, many specific and considerable problems will be encountered. tricky question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1), take by weighing 40 parts of terephthalic acid, oxalic acid, 1,4 butanediol copolyester, 50 parts of thermoplastic starch, 5.3 parts of nano-scale silicon dioxide after modification, respectively to these three kinds of raw materials Carry out drying and modification treatment;

[0026] (2) Utilize a high-speed mixer to mix the dried p-phthalic acid, oxalic acid, 1,4-butanediol copolyester, thermoplastic starch, and modified nano-scale silicon dioxide to add plasticizer (polyethylene glycol) Diol) 3.9 parts, antioxidant (antioxidant 1010) 0.1 part, lubricant (zinc stearate) 0.6 part and anti-ultraviolet agent (catechol) 0.1 part, fully mix until uniform.

[0027] (3) Add the mixed material to a twin-screw extruder for melt blending, then strand and pelletize to obtain granular mixed resin. The granular mixed resin is dehydrated and dried. The treated granular mixed resin is extruded and blown by single screw to produce terephthalic acid, oxalic acid and 1,4 butan...

Embodiment 2

[0029] (1), take by weighing 50 parts of terephthalic acid, oxalic acid, 1,4 butanediol copolyester, 40 parts of thermoplastic starch, 5.3 parts of nano-scale silicon dioxide after modification, respectively to these three kinds of raw materials Carry out drying and modification treatment;

[0030] (2) Utilize a high-speed mixer to mix the dried p-phthalic acid, oxalic acid, 1,4-butanediol copolyester, thermoplastic starch, and modified nano-scale silicon dioxide to add plasticizer (orthophthalic acid) Dimethyl diformate) 3.9 parts, antioxidant (antioxidant 1076) 0.1 part, lubricant (sodium stearate) 0.6 part and anti-ultraviolet agent (hydroquinone) 0.1 part, fully mix until uniform.

[0031] (3) Add the mixed material to a twin-screw extruder for melt blending, then strand and pelletize to obtain granular mixed resin. The granular mixed resin is dehydrated and dried. The treated granular mixed resin is extruded and blown by single screw to produce terephthalic acid, oxalic...

Embodiment 3

[0033] (1), take by weighing 60 parts of terephthalic acid, oxalic acid, 1,4 butanediol copolyester, 25 parts of thermoplastic starch, 10 parts of nano-scale silicon dioxide after modification, respectively to these three kinds of raw materials Carry out drying and modification treatment;

[0034] (2) Utilize a high-speed mixer to mix the dried p-phthalic acid, oxalic acid, 1,4-butanediol copolyester, thermoplastic starch, and modified nano-scale silicon dioxide to add a plasticizer (acetylated Triethyl citrate) 3.9 parts, antioxidant (antioxidant 1076) 0.1 part, lubricant (mixture of zinc stearate and sodium stearate) 0.9 part and anti-ultraviolet agent (catechol and hydroquinone Diphenol mixture) 0.1 part, fully mixed until uniform.

[0035](3) Add the mixed material to a twin-screw extruder for melt blending, then strand and pelletize to obtain granular mixed resin. The granular mixed resin is dehydrated and dried. The treated granular mixed resin is extruded and blown b...

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Abstract

The invention provides a biodegradable film and a preparation method thereof, which belongs to the field of biodegradable polymer materials. The biodegradable film takes terephthalic acid, oxalic acid and 1,4 butanediol copolyester as base materials, and after thermoplastic starch, modified nano-silica and other raw materials are added, a blown film produced is a fully biodegradable product and can be decomposed by microorganisms in a specific environment. The biodegradable film also has moisture resistance as well as high tensile strength, toughness and hardness, and can resist oil, moisture and temperature change. The biodegradable film can be widely used in a plurality of industries as a daily packaging film, a vest bag, a food packaging bag and the like, and plays an extremely important role in protecting environment and resources. Tests prove that packing materials made from the base materials or blends containing the base materials can be completely decomposed and only need four weeks to be thoroughly decomposed under composting conditions with no residue. The preparation method of the biodegradable film has the advantages of simple process, easy control and suitability for industrial production.

Description

technical field [0001] The invention relates to a biodegradable film and a preparation method thereof, in particular to extrusion blow molding of terephthalic acid, oxalic acid, 1,4 butanediol copolyester / thermoplastic starch / modified nano silicon dioxide, belonging to biological Degradable polymer materials field. Background technique [0002] In the past hundred years, the plastics industry has grown from scratch, from small to large, and has reached an annual output of more than 150 million tons. It is used in all fields of industry, agriculture, national defense, scientific research and people's daily life. Material. Due to the extensive application of plastics, waste plastic products are also increasing day by day. Most of the plastics are stable in performance and are not easy to be rapidly degraded by various environmental factors in nature. In addition, people do not know enough about the environmental hazards of waste plastic products and do not handle them effecti...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L3/02C08K13/02C08K3/36B29C55/28B29B9/06B29C47/60
Inventor 林存革
Owner 林存革
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