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Starch-contained biodegradable material and its preparation method

A technology for degrading materials and starch, which can be used in sustainable manufacturing/processing, climate sustainability, sustainable packaging, etc., and can solve problems such as degradation of mechanical properties of materials and changes in starch content

Active Publication Date: 2009-06-24
常州龙骏天纯环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The applicant's research found that all the currently disclosed processing methods use the raw materials to be mixed first and then pressed. It is difficult to achieve a high degree of mixing of starch and polymer materials in the raw materials, which often leads to a decrease in the mechanical properties of the prepared materials. , It can also be understood from these prior art records that when the starch concentration in the material is different, the preparation and processing methods of the material also need to be changed accordingly, so the starch content in the product cannot be changed at any time during the processing process

Method used

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  • Starch-contained biodegradable material and its preparation method
  • Starch-contained biodegradable material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Raw material ratio (parts by weight):

[0032] 20 parts polypropylene

[0033] Starch 30 parts

[0034] 1.5 parts of isopropanol

[0035] Silane coupling agent 0.5 part

[0036] Calcium stearate 0.05 parts

[0037] Mix polypropylene and calcium stearate, heat to 230-250°C, and send it to the supply box connected to nozzle 1; mix starch, isopropanol, silane coupling agent (vinyltriethylsilane) 75-85 ℃ for about 10 minutes, after being ground by a high-speed mixer, put it into the supply box connected to the shower head 2.

[0038] like figure 1 As shown, the first sprinkler system includes the nozzle 1, the feed box and the control mechanism, and the second sprinkler system includes the nozzle 2, the feed box and the control mechanism, so that the nozzle 1 and the nozzle 2 are arranged in a substantially perpendicular state (Fig. The middle "⊙" indicates that the direction is perpendicular to the surface of the paper, and the materials therein are sprayed on the surf...

Embodiment 2

[0043] Raw material ratio (parts by weight):

[0044] 20 parts polypropylene

[0045] Starch 35 parts

[0046] 1.5 parts of isopropanol

[0047] Silane coupling agent 1.0 parts

[0048] Calcium stearate 0.1 parts

[0049] Mix starch, isopropanol, and silane coupling agent (vinyl trichlorosilane) at 75-85°C for about 10 minutes, grind them and put them into the supply box connected to sprinkler 2; polypropylene and calcium stearate After mixing, it is heated to about 230-250°C and enters the supply box connected to sprinkler 1.

[0050] The setting and operation of spraying system are identical with embodiment 1, make the ejection speed of starch: the ejection speed of polypropylene=7:4, the temperature of cooling roll is about 50 ℃, can make the polypropylene-starch of preforming Mixed material.

[0051] The 2-5 layers of the mixed material are processed into dumbbell-shaped splines through an extruder, and the strength thereof is measured according to GB9341-2000, and t...

Embodiment 3

[0054] Raw material ratio (parts by weight):

[0055] 20 parts polypropylene

[0056] Starch 40 parts

[0057] 3.5 parts of glycerin

[0058] 1.5 parts of silane coupling agent

[0059] Glyceryl stearate 0.15 parts

[0060] Mix starch, glycerin, and silane coupling agent (vinyltrimethylsilane) at 75-85°C for about 10 minutes, grind them and put them into the supply box connected to the spray head 2; polypropylene and glyceryl stearate After mixing, it is heated to about 230-250°C and enters the supply box connected to sprinkler 1.

[0061] The setting and operation of spraying system are identical with embodiment 1, make the ejection speed of starch: the ejection speed of polypropylene=2:1, the temperature of cooling roll is about 60 ℃, can make the polypropylene-starch of preforming Mixed material.

[0062] The 2-5 layers of the mixed material are processed into dumbbell-shaped splines through an extruder, and the strength thereof is measured according to GB9341-2000, a...

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Abstract

The invention provides a preparation method for starch-containing biodegradable materials, which can make starch and melted polymer material emitted to the same cooling surface independently, and control the angle between the emitted directions of two spraying system nozzles above 0. After cooling, the pre-molding material can be obtained, which is a kind of biodegradable materials with polymer material as mesh and starch as filler. The material composition is more uniform, and the strength of the materials can be well maintained and improved. Meanwhile, the starch content can be adjustable during the processing.

Description

technical field [0001] The invention relates to the research and development of degradable materials, in particular to a preparation technology of a degradable material containing starch with improved strength. Background technique [0002] Due to the good degradability of starch and starch-based composite materials, both the material itself and the application of the material have always been more researched, especially the research on composite materials prepared by using starch or other natural raw materials, which is a possibility for research and development. The basis of the field of application of degradable materials. Starch-based composite materials are used to replace traditional pure chemical material composite or foam materials in technologies such as architectural decoration, packaging, tableware, etc. The goal people pursue is that the material should have higher degradation performance while improving High tensile strength and high fracture resistance. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L23/06C08L23/12C08L23/08A47G21/00B65D65/00
CPCY02W90/10
Inventor 李圣琼
Owner 常州龙骏天纯环保科技有限公司
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