Biodegradable PE-coated paper material and preparation method thereof

A biodegradable and coated paper technology, applied in the field of new polymer materials, can solve the problems of poor tensile and tear performance, clogging, and difficult bonding.

Active Publication Date: 2012-07-11
SHENZHEN ESUN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional polyethylene (PE) coated paper is easy to process, low in cost and high in efficiency, and occupies a dominant position in the coated paper material. However, there are news reports that the instant noodle box made of PE coated paper is , there will be traces of low-molecular-weight PE wax oozing out, which cannot be digested and resolved by the human body after ingestion. Over time, it will be blocked in the intestinal tract, leading to serious diseases
[0003] The development of PLA coated paper is more conducive to the sustainable development of human health and the environment, but PLA coating also has many difficulties. PLA is a hard and brittle material, and its tensile and tear properties are not very good. When used for coated paper, It is not easy to bond, the thermal stability is not as good as PE, and the processing efficiency is not as good as that of PE coated paper. Therefore, it

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Biodegradable coated paper material, including the following components: 60wt% polylactic acid, 29wt% degradable toughening resin, 10wt% elastomer, 0.8wt% processing aid and 0.2% anti-aging agent.

[0032]Put 60 parts of polylactic acid with a viscosity-average molecular weight of 120,000 and a melt index of 5g / 2.16kg*10min in a blower electric heating oven at 100°C for 1-2 hours, then mix polylactic acid with elastomer (styrene rubber) 10 parts are mixed in a high-speed mixer for 30 seconds, and the polylactic acid and styrene rubber blend is fed from the extrusion feed port for the first stage of melt extrusion granulation. The temperature of each stage is set as: feeding The mouth is 50°C, the feeding section is 160°C, the compression section is 170°C, the metering section is 170°C, the adapter is 175°C, and the die section is 180°C; the screw speed of the main engine is 180 rpm, the speed of the conveying screw is 30 rpm, and the feeding speed of the barrel is 18 rpm...

Embodiment 2

[0038] Biodegradable coated paper material, including the following components: 64wt% polylactic acid, 30wt% degradable toughening resin, 5wt% elastomer, 0.6wt% processing aid and 0.4% anti-aging agent.

[0039] Put 64 parts of polylactic acid with a viscosity average molecular weight of 120,000 and a melt index of 5g / 2.16kg*10min in a blower electric heating oven at 100°C for 1-2 hours, and mix polylactic acid with elastomer (acrylate elastomer) Mix 5 parts in a high-speed mixer for 30 seconds, feed the blend of polylactic acid and elastomer from the first feed port of the extruder, and feed 30 parts of degradable toughening resin (PBS) at 70-90 After drying at ℃ for 2-3 hours, add 0.6 parts of ethylene bisstearamide and 0.4 parts of tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester in the second step Feeding at the feed port, the temperature of each section is set to the room temperature of the feed port, the feeding section is 165°C, the compr...

Embodiment 3

[0044] Biodegradable coated paper material, including the following components: 64wt% polylactic acid, 27wt% degradable toughening resin, 8wt% elastomer, 0.5wt% processing aid and 0.5% anti-aging agent.

[0045] Put 64 parts of polylactic acid with a viscosity-average molecular weight of 120,000 and a melt index of 5g / 2.16kg*10min in a blast electric drying oven at 100°C for 1-2 hours, and 27 parts of degradable toughening resin (PBS) at 70 After drying at -90°C for 2-3 hours, add 8 parts of polylactic acid and elastomer (acrylate elastomer), degradable toughening resin (PBS), 0.5 part of processing aid (calcium stearate) and anti-aging agent (three (2,4-di-tert-butylphenyl) phosphite) 0.5 parts were mixed in a high-speed mixer for 30 seconds, fed from the feed port of the extruder, and the temperature of each section was set as: feed port 30°C, The feeding section is 165°C, the compression section is 170°C, the metering section is 175°C, the adapter is 180°C, and the die sect...

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Abstract

The invention discloses a biodegradable PE-coated paper material which comprises the following components in percentage by weight: 60-90% of polylactic acid, 5-40% degradable toughening resin, 1-10% of elastomer, 0.1-1.0% of processing aid and 0.1-1.0% of anti-aging agent. According to the invention, the compatibility of the polylactic acid and elastic degrading resin can be improved, the adhesion of the material and paper is improved, and the cost of the existing degrading PE-coated paper raw material is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of new polymer materials, in particular to a biodegradable coated paper material and a preparation method thereof. Background technique [0002] The development of biodegradable polymer materials has become one of the important solutions to the depletion of petroleum resources and the "white pollution" caused by petroleum-based polymers, especially the development of biodegradable polymer materials derived from renewable crops. As a biodegradable polymer derived from renewable crops, polylactic acid (PLA) has the advantages of excellent mechanical properties, good biocompatibility, and easy molding and processing. Due to its safety and health, it is widely used in food contact. It has been widely used, and coated paper is a good application. The traditional polyethylene (PE) coated paper is easy to process, low in cost and high in efficiency, and occupies a dominant position in the coated paper material. Ho...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L69/00C08L7/00C08L25/04C08L53/02C08L33/08C08L53/00B29C47/92D21H27/26B32B27/10B32B27/18B29C48/92
CPCB29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 吴景阳杨义浒张向南
Owner SHENZHEN ESUN IND
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