Totally degradable foam buffer packaging material and its manufacturing method

Abstract

The invention provides a complete biodegradable foam cushioning packing material and method for preparation, characterized in that starch over 80% content is used as base-material, ultra-fine polyvinyl alcohol is used as film forming intensifier, water is used as foaming agent, and core forming agent and flow modifier are added, wherein the mixture is amalgamated through blending homogeneous machine and fed into reverse-flighted screw extrusion machine for one-shot extrusion forming. The product can be used to substitute polystyrene foam for filling with no requirement on shapes.

Description

technical field

[0001] The invention relates to a fully biodegradable cushioning packaging material and a manufacturing method thereof. Background technique

[0002] In recent years, as people pay more and more attention to resource and environmental issues, renewable resources are used to produce fully biodegradable cushioning packaging products, which can be decomposed into water and carbon dioxide by microorganisms in a natural state after use. Among the researched objects, starch is It has a wide range of sources and low price, so it has become a worldwide research and development hotspot.

[0003] At first, people's development focused on thermoplastic / starch blended biodegradable plastics with Griflin, C.J.L. (Adv, Chem, Ser, 134 (1974) 159-170) technology as the core. Biodegradable, while other thermoplastic resins are still not biodegradable, such materials still pose a hazard to the environment.

[0004] In 1989, after N. Cacourse et al took the lead in applying f...

Examples

Embodiment 1

[0013] In terms of weight percentage, get 80 parts of cornstarch (150 mesh), 7.4 parts of ultrafine polyvinyl alcohol (viscosity 0.050Pa. 500mPa.s) placed in a high-speed material mixing machine for pre-mixing for 1 minute, then 7.4 parts of water were slowly and continuously added to the material system, and then the material was mixed for 15 minutes, aged in a sealed bag for 24 hours, and then directly added. The product was prepared in a 44:1 eight-stage heating self-cleaning twin-screw at a rotational speed of 300 rpm.

Embodiment 2

[0015] In terms of weight percentage, take 85.3 parts of cornstarch (200 mesh), 3.1 parts of ultrafine polyvinyl alcohol (viscosity 0.065Pa. 400mPa.s) by the processing method of embodiment 1, make corresponding product after adding 6.2 parts of water.

example 3

[0017] In terms of weight percentage, 86.6 parts of corn starch (300 mesh), 3.2 parts of ultrafine polyvinyl alcohol (viscosity 0.025Pa.s / 20°C), 1.1 parts of silicon dioxide, 1.2 parts of glass fiber, 3.2 parts of oligoamide ( Viscosity 150mPa.s) and 4.7 parts of water, after aging in a sealed bag for 24 hours, directly add to the eight-stage heating self-cleaning twin-screw with a length-to-length ratio of 44:1, and the product is prepared at a speed of 150rpm.

technical field

[0001] The invention relates to a fully biodegradable cushioning packaging material and a manufacturing method thereof. Background technique

[0002] In recent years, as people pay more and more attention to resource and environmental issues, renewable resources are used to produce fully biodegradable cushioning packaging products, which can be decomposed into water and carbon dioxide by microorganisms in a natural state after use. Among the researched objects, starch is It has a wide range of sources and low price, so it has become a worldwide research and development hotspot.

[0003] At first, people's development focused on thermoplastic / starch blended biodegradable plastics with Griflin, C.J.L. (Adv, Chem, Ser, 134 (1974) 159-170) technology as the core. Biodegradable, while other thermoplastic resins are still not biodegradable, such materials still pose a hazard to the environment.

[0004] In 1989, after N. Cacourse et al took the lead in applying f...

Examples

Embodiment 1

[0013] In terms of weight percentage, get 80 parts of cornstarch (150 mesh), 7.4 parts of ultrafine polyvinyl alcohol (viscosity 0.050Pa. 500mPa.s) placed in a high-speed material mixing machine for pre-mixing for 1 minute, then 7.4 parts of water were slowly and continuously added to the material system, and then the material was mixed for 15 minutes, aged in a sealed bag for 24 hours, and then directly added. The product was prepared in a 44:1 eight-stage heating self-cleaning twin-screw at a rotational speed of 300 rpm.

Embodiment 2

[0015] In terms of weight percentage, take 85.3 parts of cornstarch (200 mesh), 3.1 parts of ultrafine polyvinyl alcohol (viscosity 0.065Pa. 400mPa.s) by the processing method of embodiment 1, make corresponding product after adding 6.2 parts of water.

example 3

[0017] In terms of weight percentage, 86.6 parts of corn starch (300 mesh), 3.2 parts of ultrafine polyvinyl alcohol (viscosity 0.025Pa.s / 20°C), 1.1 parts of silicon dioxide, 1.2 parts of glass fiber, 3.2 parts of oligoamide ( Viscosity 150mPa.s) and 4.7 parts of water, after aging in a sealed bag for 24 hours, directly add to the eight-stage heating self-cleaning twin-screw with a length-to-length ratio of 44:1, and the product is prepared at a speed of 150rpm.