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Water-soluble starch-based packaging buffer filler and preparation method thereof

A technology of water-soluble starch and buffer filler, applied in the field of water-soluble starch-based packaging buffer filler and its preparation, can solve the problems of low biodegradability of finished products, high cost of solid waste disposal, complicated operation steps, etc., and achieve Excellent cushioning performance, short time consumption, and simple operation steps

Active Publication Date: 2021-12-31
无锡学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The raw materials used in the preparation of buffer materials in the prior art are insoluble in water, the biodegradability of the finished product is low, and the cost of subsequent solid waste disposal is high; the melt extrusion method of the screw machine is used, the operation steps are complicated, the time is long, and the energy consumption is high

Method used

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  • Water-soluble starch-based packaging buffer filler and preparation method thereof
  • Water-soluble starch-based packaging buffer filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A raw material of a water-soluble starch-based packaging buffer filling: 60 parts of water-soluble cornstarch, 10 parts of deionized water, 10 parts of polyvinyl alcohol, 2 parts of glycerin and 0.1 part of zirconium salt.

[0025] Preparation steps: (1) Mix ionic water, polyvinyl alcohol, glycerin and zirconium salt at 40°C, slowly add water-soluble cornstarch into the mixture, and use an overhead stirrer in a constant temperature water bath at 60°C at 400rpm Thoroughly mixed for 0.5h to prepare the starch mixture, and put it into a sealed polyethylene plastic bag to balance for 24h.

[0026] (2) Melt and extrude the balanced hydroxypropyl starch mixture through a screw extruder in a single-screw extruder at a three-zone barrel temperature of 100°C-120°C-140°C and a screw speed of 10rpm to prepare Thermoplastic water-soluble starch.

[0027] (3) The thermoplastic water-soluble starch is ground, cut and granulated by means of a blade grinder with an inner diameter of 2...

Embodiment 2

[0030] A kind of raw material of water-soluble starch-based packaging buffer filling: 70 parts of water-soluble tapioca starch, 15 parts of deionized water, 5 parts of polyvinyl alcohol and 0.1 part of zirconium salt.

[0031] Preparation steps: (1) Mix ionic water, polyvinyl alcohol, glycerin and zirconium salt at 40°C, slowly add water-soluble tapioca starch to the mixture, and use an overhead stirrer in a constant temperature water bath at 65°C at 600rpm Thoroughly mixed for 1 h to prepare the starch mixture, and put it into a sealed polyethylene plastic bag to balance for 36 h.

[0032] (2) Melt and extrude the balanced hydroxypropyl starch mixture through a screw extruder in a single-screw extruder at a three-zone barrel temperature of 120°C-140°C-160°C and a screw speed of 20rpm to prepare Thermoplastic water-soluble starch.

[0033] (3) The thermoplastic water-soluble starch is ground, cut and granulated by means of a blade grinder with an inner diameter of 2mm, dried ...

Embodiment 3

[0036] The raw material of a water-soluble starch-based packaging buffer filling: 80 parts of potato water-soluble starch, 25 parts of deionized water, 20 parts of polyvinyl alcohol, 10 parts of glycerin and 0.3 parts of calcium hydroxide.

[0037] Preparation steps: (1) Mix ionic water, polyvinyl alcohol, glycerin and calcium hydroxide at 40°C, slowly add water-soluble potato starch into the mixture, and use an overhead stirrer in a constant temperature water bath at 70°C at 800rpm The starch mixture was prepared by mixing thoroughly for 1.5 hours, and put it into a sealed polyethylene plastic bag and equilibrated for 30 hours.

[0038] (2) Melt and extrude the balanced hydroxypropyl starch mixture through a screw extruder in a single-screw extruder at a three-zone barrel temperature of 140°C-140°C-140°C and a screw speed of 30rpm to prepare Thermoplastic water-soluble starch.

[0039] (3) The thermoplastic water-soluble starch is ground, cut and granulated by means of a bla...

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Abstract

The invention discloses a water-soluble starch-based packaging buffer filler and a preparation method thereof. The buffer filler comprises, by weight, 60-80 parts of water-soluble starch, 10-40 parts of deionized water, 10-20 parts of polyvinyl alcohol, 0-10 parts of a plasticizer and 0-1 part of a cross-linking agent. The water-soluble starch-based packaging buffer filler is high in biodegradability, can be completely dissolved in water within 7 seconds, and has excellent buffer performance, and the elastic index is greater than 74%; and the preparation method is simple, a one-step depressurization foaming method is used, and compared with an existing screw machine melt extrusion method, the operation steps are simple, and consumed time is short.

Description

technical field [0001] The invention relates to a packaging buffer filler, in particular to a water-soluble starch-based packaging buffer filler and a preparation method thereof. Background technique [0002] Packaging buffer filler refers to the cushioning material that can reduce the collision of items and protect the items during the transportation of items. Conventional packaging cushioning fillers are foam, pearl cotton, and air bags. Among them, the most widely used is foam packing filler. Foam padding is a petroleum-based cushioning material, which has the problem of polluting the environment during use. [0003] In order to avoid the pollution of petroleum-based buffer materials to the environment, the existing technology has begun to develop environmentally-friendly buffer materials, but corn and tapioca starch are mostly used as environmentally-friendly bases. The water solubility of corn and tapioca starch is poor, resulting in biodegradability in the environmen...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L29/04C08J9/12
CPCC08J9/125C08J9/0061C08J2303/02C08J2429/04C08J2203/10Y02W90/10
Inventor 陈杰汪磊王正梅李海玉范叶丽
Owner 无锡学院
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