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High-strength and high-toughness biodegradable film and preparation method thereof

A biodegradable, high-strength and high-toughness technology, applied in flat products, other household appliances, applications, etc., can solve the problems of failing to provide toughness solutions for biodegradable materials, reducing the strength and temperature resistance of materials, and affecting the normal use of materials. , to achieve the effect of low production cost, high production efficiency and easy implementation

Inactive Publication Date: 2017-02-22
SHENZHEN HONGCAI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent document CN105623219A relates to a fully degradable injection molding product, whose elongation, softness and physical and mechanical properties have been improved to a certain extent, but the alkali treatment agent NaOH used in it will greatly accelerate the aging of the material and affect the normal use of the material
Patent document CN103540111B provides a high-strength, high-temperature-resistant fully degradable polylactic acid sheet and its manufacturing method. The method uses polylactic acid as the main material. Although tougheners and other materials are used, it is necessary to use tougheners at the same time The strength and temperature resistance of the material are reduced, but the invention itself does not adjust this contradiction, and fails to provide a solution for the toughness of biodegradable materials

Method used

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preparation example Construction

[0051] The present invention also provides a method for preparing the above-mentioned high-strength and high-toughness biodegradable film, comprising the following steps:

[0052] Step 1. Weigh the biodegradable resin, filler, reinforcing fiber, compatibilizer, and processing aid according to the mass percentage of each raw material component in the above-mentioned high-strength and high-toughness biodegradable film, and place the weighed biodegradable resin in the drum In the air drying equipment, dry until the moisture content is lower than 500ppm for later use.

[0053] Step 2. Pour the dried biodegradable resin and the weighed filler into the high-speed mixer, and then add the weighed reinforcing fiber, processing aid and compatibilizer under the mixing state, and continue mixing for 30- After 60s, discharge.

[0054] Preferably, in the step 2, after adding the weighed reinforcing fiber, processing aid and compatibilizer, the mixing time is about 30s, so as to ensure that...

Embodiment 1

[0061] Based on 100 parts by weight of the total raw material components of the prepared high-strength and high-toughness biodegradable film, accurately weigh 50 parts by weight of polybutylene succinate and place it in an oven at 80°C, and dry it for more than 12 hours for later use. . Weigh 20 parts by weight of calcium carbonate, 10 parts by weight of sisal fiber, 15 parts by weight of tributyl citrate, and 5 parts by weight of a reactive compatibilizer. Mix the above materials evenly in a high-speed mixer, and the mixed materials are extruded through a co-rotating twin-screw extruder (extrusion temperature 160°C, main screw speed 200r / min), and cooled by air-cooled drag chain puller equipment , cutting into pellets, and packaging to obtain the modified film. Put the prepared film modification material into the film blowing machine (processing temperature 150°C, host speed 90r / min), and through cooling, traction, winding and other devices, a high-strength and high-toughnes...

Embodiment 2

[0064] Based on 100 parts by weight of the total raw material components of the prepared high-strength and high-toughness biodegradable film, accurately weigh 10 parts by weight of polybutylene succinate and 40 parts by weight of polylactic acid and place them at 60°C In the oven, dry for more than 12 hours. Weigh 30 parts by weight of starch, 15 parts by weight of polyester polyol, and 5 parts by weight of block copolymer. Mix the above materials evenly in a high-speed mixer, and the mixed materials are extruded through a co-rotating twin-screw extruder (extrusion temperature 160°C, main screw speed 200r / min), and cooled by air-cooled drag chain puller equipment , cutting into pellets, and packaging to obtain the modified film. Put the prepared film modification material into the film blowing machine (processing temperature 150°C, host speed 90r / min), and through cooling, traction, winding and other devices, a high-strength and high-toughness biodegradable film with excellen...

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Abstract

The invention provides a high-strength and high-toughness biodegradable film and a preparation method thereof. The high-strength and high-toughness biodegradable film comprises components of raw materials in percentage by mass as follows: 10wt%-90wt% of biodegradable resin, 2wt%-60wt% of filler, 0.1wt%-50wt% of reinforced fibers, 0.1wt%-20wt% of a compatilizer and 0.5wt%-25wt% of a processing aid. The high-strength and high-toughness biodegradable film has higher tensile yield strength and tearing strength, the tensile yield strength of the film reaches 20 Mpa or higher, Elmendorf tearability is higher than 400 gf, and the biodegradable film can pass biodegradability tests such as ASTM D6400 and the like, integrates excellent tensile property, tearing resistance and rigidity and is suitable for occasions such as postal and express packing and the like with higher requirements for tensile yield strength and tearing strength. The preparation method of the high-strength and high-toughness biodegradable film is easy to implement, low in production cost and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of biodegradable plastic materials, in particular to a high-strength and high-toughness biodegradable film and a preparation method thereof. Background technique [0002] At present, plastic products have penetrated into various fields of the national economy, but the environmental pollution and energy crisis brought about by the wide application of plastics are also becoming more and more serious. Therefore, the use of biodegradable plastics is imminent. In recent years, countries around the world have attached great importance to the development of biodegradable plastics, especially biodegradable plastics whose raw materials come from renewable resources or industrial waste gas (carbon dioxide), and polylactic acid (PLA), polyhydroxyalkanoate (PHA), poly Propylene carbonate (PPC), polybutylene succinate (PBS), polybutylene succinate-terephthalate (PBST), polybutylene adipate-terephthalate (PBAT), polycap...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L1/02C08L3/02C08L67/00C08L69/00C08K13/02C08K5/053C08K5/103C08K3/26C08K5/11B29D7/01
CPCC08J5/18C08J2300/16C08J2367/03C08J2367/04C08J2403/02C08L67/02B29D7/01C08J2367/02C08J2369/00C08K2201/014C08L67/04C08L69/00C08L2201/06C08L2203/16C08L2205/02C08L2205/025C08L2205/035
Inventor 杨宏李积迁吴丽珍陈涛郭健
Owner SHENZHEN HONGCAI NEW MATERIAL TECH
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