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Method for preparing recyclable biological packaging material

A packaging material and biological technology, applied in the field of preparation of biomass polymer packaging materials, can solve the problems that products cannot be recycled repeatedly, parameter conditions are difficult to control, and the preparation process is complicated, so as to achieve reduced losses, high product quality, and improved product quality. The effect of microstructure

Inactive Publication Date: 2012-06-20
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the existing packaging materials and preparation technologies with plastic as the main raw material generally have disadvantages such as complex preparation process, difficult control of parameter conditions, high preparation cost, products that cannot be recycled repeatedly, serious environmental pollution, and poor safety in use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In this embodiment, 50 parts of starch, 30 parts of plant fiber, and 20 parts of additives are respectively taken according to the mass fraction; the process parameters of the twin-screw extruder are that the screw speed is 100r min-1, and the extrusion temperature is 120°C; the molding process parameters are, Molding time: 15min; molding temperature: 120°C; prepared materials and test structures are as follows:

[0018] (1) Resilience test: Apply a load to the sample to cause 20% deformation of the sample, load it for 12 hours and keep it unloaded for 5 minutes to measure the thickness of the sample, and the rebound rate ε can be obtained H The size of is:

[0019] ε H =T 0 -T / T 0

[0020] where T 0 is the original thickness of the sample, T is the thickness after unloading;

[0021] (2) Tensile strength test: the tensile strength is made according to GB / T1040-92, and the size is 150 × 20mm. There are 5 specimens in each group, and the average value is taken afte...

Embodiment 2

[0023] In this embodiment, 65 parts of starch, 20 parts of plant fiber, and 15 parts of additives are respectively taken in parts by mass; the process parameters of the twin-screw extruder are that the screw speed is 100r min-1, and the extrusion temperature is 120°C; the molding process parameters , Molding time: 15min; Molding temperature: 120°C; The prepared materials and test structures are as follows:

[0024] (1) Resilience test: Apply a load to the sample to cause 20% deformation of the sample, load it for 12 hours and keep it unloaded for 5 minutes to measure the thickness of the sample, and the rebound rate ε can be obtained H The size of is:

[0025] ε H =T 0 -T / T 0

[0026] where T 0 is the original thickness of the sample, and T is the thickness after unloading.

[0027] (2) Tensile strength test: the tensile strength is made according to GB / T1040-92, and the size is 150×20mm. There are 5 specimens in each group, and the average value is taken after measureme...

Embodiment 3

[0029] In this embodiment, 70 parts of starch, 10 parts of plant fiber, and 20 parts of additives are respectively taken according to the mass fraction; the process parameters of the twin-screw extruder are that the screw speed is 120r min-1, and the extrusion temperature is 120°C; the molding process parameters are, Molding time: 15min; molding temperature: 140°C; prepared materials and test structures are as follows:

[0030] (1) Resilience test: Apply a load to the sample to cause 20% deformation of the sample, load it for 12 hours and keep it unloaded for 5 minutes to measure the thickness of the sample, and the rebound rate ε can be obtained H The size of is:

[0031] ε H =T 0 -T / T 0

[0032] where T 0 is the original thickness of the sample, and T is the thickness after unloading.

[0033] (2) Tensile strength test: The tensile strength is made according to GB / T1040-92, and the size is 150×20mm. There are 5 specimens in each group, and the average value is taken af...

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Abstract

The invention belongs to the technical field of polymer materials and relates to a method for preparing a recyclable biological packaging material. The method forms the material by using starch, plant fibers and an additive as raw materials and by granulating in a double screw extruder and die pressing. The Packaging material comprises 50 to 70 mass parts of starch, 15 to 30 mass parts of plant fibers and 5 to 20 mass parts of additive. The preparation method comprises the following steps: (1) weighing the raw material, stirring the weighed raw material in a stirrer for 3 to 5 minutes, uniformly mixing and obtaining a mixture; (2) graduating the mixture in a double screw extruder, extruding from an extruding die, and obtaining a granular material or product mother batch, wherein the rotation speed of the screw is 100 to 120r / min, the extrusion temperature is 100 to 120 DEG C and the feeding speed is 100r / min; and (3) filling the extruded granular material in a flat plate vulcanizer, and die pressing the granular material to obtain the recyclable biological packaging material, wherein the die pressing time is 15 minutes, and the die pressing temperature is 120 to 140 DEG C. The overall process is simple, the used raw materials are readily available, the equipment technology is mature, the degrading performance of the recyclable biological packaging material is high, the utilization rate of the recyclable biological packaging material is high, and the recyclable biological packaging material is environment-friendly.

Description

Technical field: [0001] The invention belongs to the technical field of polymer materials, and relates to a preparation technology of a recycling type biological packaging material, in particular to a preparation method of a biomass polymer packaging material used for packaging products. Background technique: [0002] Traditional packaging materials generally use petrochemical materials such as polyethylene and polystyrene, which not only pollute the environment but also cause waste of resources after being discarded; the emergence of biomass packaging materials fundamentally solves this problem, using resource-rich, degradable Materials to replace traditional plastic materials, many researchers at home and abroad have conducted extensive research. The research on bio-packaging materials began in the 1970s. British scientist G.J.L.Griffin applied for the world's first patent for starch-filled polyethylene plastics, creating a precedent for bio-packaging materials. Various s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L3/08C08L97/02C08J9/10B29B9/06B29C43/02
Inventor 汪传生曾宪奎林广义李利陈春平张德伟郭磊
Owner QINGDAO UNIV OF SCI & TECH
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