Method for preparing fully-biodegradable agricultural film

A technology of biodegradable and agricultural film, which is applied in the field of preparation of fully biodegradable agricultural film, which can solve the problems of low softening point, insufficient complete degradability and timeliness of modified polylactic acid, and inability to meet mass production.

Active Publication Date: 2012-11-28
郑文彬 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As we all know, polylactic acid (PLA) is a world-recognized biodegradable material, but it has not been widely used because of its high cost, low softening point, poor ductility, brittleness and obvious linearity. To the field of agricultural film or other film products
[0003] Due to the above-mentioned shortcomings of polylactic acid, various polylactic acid products (injection molding and sheet materials) on the market currently use polycaprolactone (PCL) to modify polylactic acid to improve its fragility and other shortcomings, making it The performance of the finished product can meet the user's requirements, but the complete degradability and timeliness of the modified polylactic acid prepared by this

Method used

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  • Method for preparing fully-biodegradable agricultural film
  • Method for preparing fully-biodegradable agricultural film
  • Method for preparing fully-biodegradable agricultural film

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Embodiment Construction

[0015] Below according to example the present invention is further described:

[0016] A preparation method for completely biodegradable agricultural film, comprising the following steps:

[0017] (1) Add polylactic acid and additives to the reaction tank in a mass ratio of 1:0.2 and mix them for modification. The components of the additives are glycerin, polylactic acid glycolic acid, and licorice. The ratio is 7:2:1;

[0018] The preparation method of the additive is as follows: after mixing glycerol, polylactic acid glycolic acid and licorice according to the above ratio, emulsification at a temperature of 60°C;

[0019] (2) Mix and stir the modified polylactic acid and the filler, and then produce completely biodegradable polylactic acid polymer particles through a granulator. The proportioning ratio of the polylactic acid and the filler is as follows: Lactic acid accounts for 40%, fillers account for 60%;

[0020] The specific composition and proportioning of described...

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Abstract

The invention relates to a method for preparing a fully-biodegradable agricultural film, and the method comprises the following specific steps of: firstly, adding polylactic acid and additive into a reaction tank, and mixing and modifying the polylactic acid and the additive, wherein the additive comprises the ingredients of glycerol (glycerin), poly(lactic acid-glycolic acid) and liquorice; then, uniformly stirring the modified polylactic acid and packing, preparing the mixture into fully-biodegradable polylactic acid polymer particles by virtue of a granulator; and finally, casting the polylactic acid polymer particles into a film by virtue of a film casting machine, and cutting the film by virtue of a slitting machine according to specification requirements, so as to obtain the agricultural film of the required specificatio. The agricultural film has the effects of being lower in production cost, completely substituting for the existing plastic films and realizing a full biodegradation effect within specific time according to the requirements.

Description

technical field [0001] The invention relates to a preparation method of a film product, in particular to a preparation method of a completely biodegradable agricultural film. Background technique [0002] As we all know, polylactic acid (PLA) is a world-recognized biodegradable material, but it has not been widely used because of its high cost, low softening point, poor ductility, brittleness and obvious linearity. To the field of agricultural film or other film products. [0003] Due to the above-mentioned shortcomings of polylactic acid, various polylactic acid products (injection molding and sheet materials) on the market currently use polycaprolactone (PCL) to modify polylactic acid to improve its fragility and other shortcomings, making it The performance of the finished product can meet the user's requirements, but the complete degradability and timeliness of the modified polylactic acid prepared by this method are obviously insufficient, and the production cost of th...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L3/02C08K13/02C08K5/053C08K3/26C08K3/34C08K5/1515C08K5/09C08K5/21A01G13/02
Inventor 纪永明郑文彬
Owner 郑文彬
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