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Microfoamed fully biodegradable polymer sheet and preparation method thereof

A biodegradable polymer and all-biological technology, applied in the field of micro-foamed fully biodegradable polymer sheet and its preparation, can solve the problems of secondary pollution, high equipment requirements, difficult process control, etc., to improve toughness and impact resistance properties, reduce apparent density, and improve compatibility

Active Publication Date: 2022-01-07
江西玉源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, fully biodegradable polymer foam sheets can be produced by physical or chemical foaming. The method of physical foaming mainly includes supercritical carbon dioxide foaming method, and its disadvantages are high requirements for equipment and high process costs; The chemical foaming method is mainly formed by adding a chemical foaming agent such as AC foaming agent to the matrix. The disadvantage is that it requires high fluidity of the matrix and produces secondary pollution. It is not suitable for food with a high hygiene level. In the field of packaging, there are strict requirements on the production process conditions, and the process is difficult to control

Method used

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  • Microfoamed fully biodegradable polymer sheet and preparation method thereof

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preparation example Construction

[0033] The preparation method of the micro-foamed fully biodegradable polymer sheet according to the second aspect of the present invention is used to prepare the micro-foamed fully biodegradable polymer sheet according to the first aspect of the present invention, comprising steps: (1) by Mass ratio Weigh 100 parts of polymer that can be melted and processed at low temperature, 50-100 parts of microsphere foaming agent and 5-10 parts of compatibilizer, first mix with a mixer for 1-20 minutes, and then mix with an internal mixer, Finally, a single-screw granulator or a twin-screw granulator is extruded and granulated to obtain a microsphere blowing agent masterbatch; (2) 100 parts of fully biodegradable polymers are weighed according to the mass ratio, and the microsphere blowing agent masterbatch is 3 -12 parts, 3-8 parts of compatibilizer, 10-50 parts of bio-based filler and 3-8 parts of processing aid glycerin, mixed in a high-speed mixer, the speed of the high-speed mixer i...

Embodiment 1

[0038] (1) Take by weight proportion 100 parts of ethylene-vinyl acetate copolymers whose model is E40-L of Mitsui Chemicals Company, 50 parts of acrylonitrile copolymers containing low-boiling point hydrocarbons and methyl 5 parts of glycidyl acrylic acid grafted ethylene propylene copolymer, after mixing in a mixer, knead with an internal mixer, and finally extrude and granulate with a single-screw extruder to obtain microsphere foaming agent masterbatch; The temperature of the extruder is 110°C, the temperature of each zone of the barrel of the single-screw extruder is T1=80°C, T2=85°C, T3=90°C, T4=120°C, the temperature of the head is 110°C, and the screw speed is 30r / min;

[0039] (2) Take by weighing 100 parts of polylactic acid, 3 parts of microsphere foaming agent masterbatches, 10 parts of corn starch processed by silane coupling agent and 3 parts of glycerin, and mix in a high-speed mixer. The rotating speed is 100r / min, and the mixing time is 10min to obtain the mat...

Embodiment 2

[0042] (1) Take 100 parts of ethylene-acrylic acid copolymers that the Dow Chemical Company model is 5980I by mass ratio, 100 parts of acrylonitrile copolymers containing low boiling point hydrocarbons and methacrylic acid shrinkage that the Akzo Nobel Company model is 909DU80 10 parts of glyceryl ether grafted ethylene-vinyl acetate copolymers, mixed in a mixer, kneaded with an internal mixer, and finally extruded and granulated with a twin-screw extruder to obtain microsphere foaming agent masterbatches; wherein The machine temperature is 100°C, the temperature of each zone of the twin-screw extruder barrel is T1=80°C, T2=85°C, T3=90°C, T4=110°C, the head temperature is 100°C, and the screw speed is 30r / min;

[0043] (2) Take by weight 100 parts of polyadipate / butylene terephthalate (PBAT), 12 parts of microsphere foaming agent master batches, 50 parts of wood flour processed by titanate coupling agent and 8 parts of glycerin are mixed in a high-speed mixer, the rotating spe...

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Abstract

The invention provides a microfoamed fully biodegradable polymer sheet and a preparation method thereof. The microfoamed fully biodegradable polymer sheet includes the following components in parts by mass: 100 parts of fully biodegradable polymer, 3-12 parts of microsphere foaming agent masterbatch, 10-50 parts of bio-based filler, glycerin 3-8 parts; the microsphere foaming agent masterbatch includes the following components in mass fractions: 100 parts of low-temperature melt-processable polymers, 50-100 parts of microsphere foaming agents, and 5-10 parts of compatibilizers . The invention can obtain a fully biodegradable sheet with excellent mechanical properties such as high foaming ratio, low density, good toughness, and strong impact resistance. The sheet can be used to make fast consumer goods such as lunch boxes, and has high application value and good performance. application prospects.

Description

technical field [0001] The invention relates to the field of processing and molding of polymer materials, and more specifically relates to a microfoamed fully biodegradable polymer sheet and a preparation method thereof. Background technique [0002] In modern life, people pay more and more attention to resource and environmental issues. The production of fully biodegradable products from renewable resources is the main development direction in the future. After use, fully biodegradable products can be decomposed into water and carbon dioxide by microorganisms in a natural state, which is harmful to the environment. Without any pollution. The traditional foam plastics are polyethylene, polypropylene, polyvinyl chloride, polystyrene and other plastics. Although they are excellent in light weight, heat insulation, sound insulation, and cushioning, they are widely used in insulation, cushioning, and absorption. and load-bearing structures. However, none of them are degradable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L23/12C08L3/02C08L97/02C08K5/053C08J9/32C08J5/18
CPCC08J9/32C08J9/0061C08J9/0023C08J5/18C08J2367/04C08J2367/02C08J2323/12C08J2403/02C08J2497/02C08J2203/22
Inventor 黄志诒李全文喜松
Owner 江西玉源环保科技有限公司
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