A kind of biodegradable polyester composition

A biodegradable polyester and biodegradable technology, applied in the field of biodegradable polyester compositions, can solve the problems of harm to the human body, damage to polyester performance, and lower viscosity of polyester mixtures, so as to reduce friction, facilitate opening, and improve static friction The effect of the coefficient

Active Publication Date: 2020-05-19
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of biodiesel damages the performance of polyester to a certain extent, which will reduce the viscosity of the polyester mixture. At the same time, biodiesel is a non-edible additive that is harmful to the human body and is not conducive to the development of food packaging films.

Method used

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  • A kind of biodegradable polyester composition
  • A kind of biodegradable polyester composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-20 and comparative example 1-7

[0036] According to the formula shown in Table 1, mix biodegradable polyester, alkali metal salt, and antioxidant 1010, put them into a single-screw extruder, extrude and pelletize at 140°C-232°C, and obtain biodegradable polyester ester composition. The performance test data are shown in Table 1.

[0037] Wherein, the weight content of potassium element and sodium element in the biodegradable polyester composition is adjusted and measured by the actual amount of alkali metal salt added during the preparation process of the biodegradable polyester composition.

[0038] Performance evaluation method:

[0039] Quantitative method for alkali metal elements:

[0040] Weigh 0.500g of the biodegradable polyester composition sample to be tested, add 10ml of concentrated sulfuric acid, heat and digest on the electric heating plate, add hydrogen peroxide dropwise until the digestion is complete, and set the solution to 50ml. Use dilute sulfuric acid solution of the element to be tes...

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Abstract

Disclosed is a biodegradable polyester composition, comprising the following components: a, a biodegradable aliphatic-aromatic polyester; and b, an alkali metal element, wherein the alkali metal element is selected from at least one of potassium element and sodium element; and the weight content of the alkali metal element is 1 ppm - 232 ppm based on the total weight of the biodegradable polyester composition. In the present invention, by adding an alkali metal salt in the biodegradable polyester composition and controlling the content of the alkali metal element in the composition within the range of 1 ppm - 232 ppm, the static friction coefficient of a film material can be improved, and the static friction coefficient of the film material is controlled within the range of 0.2 - 0.3 to make the film easier to open and simultaneously reduce the friction between the film and equipment, so as to ensure the smooth performance of film-blowing.

Description

technical field [0001] The invention belongs to the field of polymer material modification, and in particular relates to a biodegradable polyester composition. Background technique [0002] Biodegradable resins are widely used in various film materials, such as biodegradable bags, mulch films, fresh-keeping films, express bags, etc. After the resin is melted at high temperature, it is blown with high-pressure gas to form a double-layer film. In actual production, it often happens that the double-layer film cannot be separated smoothly after cooling due to the strong adhesion at high temperature. [0003] In the prior art, anti-blocking agent and slip agent are usually added to improve the above two problems, such as adding 0.5-1% slip agent and 0.5-3% anti-blocking agent in patent CN 103627151B. The slip agent is usually one or more of stearates, organic carboxylic acid amides or waxes, wherein the stearates are: calcium stearate, magnesium stearate, zinc stearate, Barium ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08K3/32
CPCC08J5/18C08J2367/02C08K3/32C08K2003/324C08K2201/014C08L2201/06C08L2203/16C08L67/02
Inventor 黄险波王伟伟袁志敏蔡彤旻曾祥斌苑仁旭郭志龙唐美军
Owner KINGFA SCI & TECH CO LTD
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