阅读说明：本技术 一种淀粉发泡包装内玉及其制备方法 (Starch foaming packaging inner jade and preparation method thereof ) 是由 曾广胜 江太君 孟聪 胡灿 陈一 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种淀粉发泡包装内玉,由以下质量份数的原材料制成：淀粉：30~50份、PVA：30~50份、甘油：5~8份、聚乙二醇：3~6份、发泡剂：1~4份。本发明通过引淀粉、塑化剂与粘接剂PVA,通过化学发泡的方法制备了适合于异型包装内玉生产的全降解淀粉复合材料及发泡成型工艺,制备的发泡内玉密度为0.6-0.9g/cm3。本发明的发泡条件温和,处理工艺可控,对环境无不良影响。(The invention discloses a starch foamed packaging interior jade, which is prepared from the following raw materials in parts by mass: starch: 30-50 parts of PVA: 30-50 parts of glycerol: 5-8 parts of polyethylene glycol: 3-6 parts of foaming agent: 1-4 parts. The invention prepares the fully degradable starch composite material suitable for the production of the special-shaped package interior jade by introducing starch, plasticizer and adhesive PVA and adopting a chemical foaming method and a foaming molding process, and the density of the prepared foaming interior jade is 0.6-0.9g/cm 3. The invention has the advantages of mild foaming conditions, controllable treatment process and no adverse effect on the environment.)

1. The starch foaming packaging interior jade is characterized by being prepared from the following raw materials in parts by mass: starch: 30-50 parts of PVA: 30-50 parts of glycerol: 5-8 parts of polyethylene glycol: 3-6 parts of foaming agent: 1-4 parts.

2. The starch foamed interior trim according to claim 1, wherein the starch has a moisture content of less than 1%.

3. The starch foamed packaging lining as claimed in claim 1, wherein the starch has a particle size of 80 to 200 mesh.

4. The starch foamed packaging lining as claimed in claim 1, wherein the polyethylene glycol has a molecular weight of 400 to 600.

5. The starch foamed interior package of claim 1, wherein the foaming agent is at least one of sodium bicarbonate or an AC foaming agent.

6. A method for preparing the starch foaming packaging interior jade as claimed in any one of claims 1 to 5, which comprises the following steps:

s1, mixing starch, PVA, glycerol, polyethylene glycol and an AC foaming agent in a high-speed mixer and then standing;

s2, placing the mixture obtained in the step S1 into an internal mixer for stirring;

s3, pressing the stirred materials into material blocks after weighing;

and S4, transferring the material blocks into a cavity of a mould pressing mould, shaping and foaming after the mould is closed, and then cooling and shaping by introducing water to obtain the starch foaming package inner jade.

7. The method according to claim 6, wherein the temperature of the internal mixer in the step S2 is 100 to 135 ℃.

8. The method according to claim 6, wherein the temperature of the molding die in step S4 is 140-160 ℃.

Technical Field

The invention relates to the technical field of foaming materials, in particular to starch foaming packaging interior jade and a preparation method thereof.

Background

Starch is a renewable recyclable green material from natural plants, can be used as grain for human eating, and is widely applied to the fields of chemical industry and new materials for preparing various composite materials. Due to the excellent biodegradability, starch is generally used as filling to prepare thermoplastic high-biochar-content bio-based composite materials, is widely applied to disposable products, and is more and more valued by people in the large environment that petrochemical resources are increasingly in shortage and white pollution is increasingly serious at present. With the development of related technology and technology, starch is gradually used as a completely degradable material, widely applied to various industrial and civil fields, and used for replacing traditional plastic products.

In the packaging industry, the quantity of jade (the heterotypic foaming accessory that is used for supporting the goods inside the packing carton) in the packing carton for making is huge, adopts foaming EVA as the main material mostly, in order to save the cost, and the material that uses is mostly the reworked material, and foaming and processing aid in addition, the organic smell that volatilizees in the goods is very serious, influences the green environmental protection performance of product. Starch is very suitable for preparing the packaging jade products as a natural novel material, but the foaming process of the starch material is difficult to control, so that the starch foaming material and the process which are suitable for processing and manufacturing the irregular packaging jade are needed to be developed.

Disclosure of Invention

The invention aims to provide the starch foaming packing inner jade which has the advantages of low density, low cost and no adverse effect on the environment, aiming at the defects in the prior art.

The invention also aims to provide a preparation method of the starch foaming package internal jade.

The purpose of the invention is realized by the following technical scheme:

the starch foaming packaging interior jade is prepared from the following raw materials in parts by mass: starch: 30-50 parts of PVA: 30-50 parts of glycerol: 5-8 parts of polyethylene glycol: 3-6 parts of foaming agent: 1-4 parts.

Further, the starch has a moisture content of less than 1%.

Further, the particle size of the starch is 80-200 meshes.

Further, the molecular weight of the polyethylene glycol is 400-600.

Further, the foaming agent is at least one of sodium bicarbonate or an AC foaming agent.

A preparation method of the starch foaming package inner jade comprises the following steps:

s1, mixing starch, PVA, glycerol, polyethylene glycol and an AC foaming agent in a high-speed mixer and then standing;

s2, placing the mixture obtained in the step S1 into an internal mixer for stirring;

s3, pressing the stirred materials into material blocks after weighing;

and S4, transferring the material blocks into a cavity of a mould pressing mould, shaping and foaming after the mould is closed, and then cooling and shaping by introducing water to obtain the starch foaming package inner jade.

Further, the temperature of the internal mixer in the step S2 is 100-135 ℃.

Further, the temperature of the molding die in the step S4 is 140-160 ℃.

Compared with the prior art, the invention has the following beneficial effects:

the invention prepares the fully degradable starch composite material suitable for the production of the special-shaped package interior jade by introducing starch, plasticizer and adhesive PVA and adopting a chemical foaming method and a foaming molding process. The density of the prepared foamed inner jade is 0.6-0.9g/cm³. The invention has the advantages of mild foaming conditions, controllable treatment process and no adverse effect on the environment.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited to the following specific examples.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.

Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.