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Method for preparing environment-friendly plastics for manufacturing biomacromolecular carriers and biological utensils

A biological macromolecule and biological technology, which is applied in the field of green plastic preparation for the manufacture of biological macromolecular carrier biological vessels, can solve the problems of unsuitability for large-scale production, low production efficiency, complicated process, etc., and achieve saving of production costs and application range, Increased productivity and ease of operation

Inactive Publication Date: 2017-02-15
LINHAI KEJING BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the homopolymer of polylactic acid (PLA) has many defects, and the relative molecular weight distribution is relatively wide, which makes polylactic acid products too brittle, low in strength, poor in hydrophilicity, low in melting point, and high in price, unable to compete with traditional plastics. and other defects
[0004] In order to broaden the application field, researchers usually use chemical grafting, copolymerization, crosslinking, surface modification or physical modification, such as blending, plasticization, volume addition and other methods to modify and develop new polylactic acid materials, but the process is relatively complex. Complex and difficult to control, not suitable for large-scale production, and low production efficiency

Method used

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  • Method for preparing environment-friendly plastics for manufacturing biomacromolecular carriers and biological utensils
  • Method for preparing environment-friendly plastics for manufacturing biomacromolecular carriers and biological utensils
  • Method for preparing environment-friendly plastics for manufacturing biomacromolecular carriers and biological utensils

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A green plastic preparation method for manufacturing biological macromolecule carriers and biological vessels, the specific steps are as follows: a: Add low molecular weight polylactic acid to high molecular weight polylactic acid and blend uniformly to obtain mixture A, wherein the low molecular weight polylactic acid in step a Lactic acid and high-molecular-weight polylactic acid are about 1:20, and then made into highly flexible polylactic acid, because when polylactic acid melts at high temperature, its cross-linking bonds open and combine with nano-scale calcium phosphate to form macromolecules. This process belongs to thermophysical The chemical reaction can be completed in only 15 minutes when it is melted, and there is no need for more complicated chemical modification such as grafting reaction. It only needs to be heated and stirred to melt and mix evenly, so the quality and performance are stable and controllable, and it is easy to operate;

[0034] b: Heating ...

Embodiment 2

[0052] A green plastic preparation method for manufacturing biological macromolecule carriers and biological vessels, the specific steps are as follows:

[0053] a: Add low-molecular-weight polylactic acid to high-molecular-weight polylactic acid and blend uniformly to obtain mixture A, wherein the ratio of low-molecular-weight polylactic acid and high-molecular-weight polylactic acid in step a is about 1:20, and then high-flexibility polylactic acid is produced;

[0054] b: Heat the mixture A and add nano-calcium carbonate to stir and blend evenly, the weight ratio of nano-calcium phosphate to mixture A is 0.1;

[0055] c: extrusion granulation to generate green plastic masterbatch.

[0056] The green plastic masterbatch has high plasticity and low glass transition temperature; its bending strength is 68MPa, which fully meets the requirements of modern medical devices; and it can be blown and injected at low temperature and high pressure, and can be produced on a large scale; b...

Embodiment 3

[0072] A kind of green plastic preparation method that is used to manufacture biological container, concrete steps are as follows:

[0073] a: Add low-molecular-weight polylactic acid to high-molecular-weight polylactic acid and blend uniformly to obtain mixture A, wherein the ratio of low-molecular-weight polylactic acid and high-molecular-weight polylactic acid in step a is about 1:20, and then high-flexibility polylactic acid is produced;

[0074] b: Heat the mixture A and add nano-calcium carbonate to stir and blend evenly, the weight ratio of nano-calcium phosphate to mixture A is 0.3;

[0075] c: extrusion granulation to generate green plastic masterbatch.

[0076] The green plastic masterbatch has high plasticity and low glass transition temperature; its bending strength is 68MPa, which fully meets the requirements of modern medical devices; and it can be blown and injected at low temperature and high pressure, and can be produced on a large scale; because the modified ...

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Abstract

The invention relates to the technical field of preparation of environment-friendly plastics for manufacturing biological utensils and particularly relates to a method for preparing the environment-friendly plastics for manufacturing biomacromolecular carriers and the biological utensils. The method comprises the following specific steps: adding low-molecular-weight polylactic acid into high-molecular-weight polylactic acid, and carrying out uniform blending, so as to obtain a mixture A; heating the mixture A, adding nano calcium carbonate into the heated mixture A, and carrying out intense agitation so as to uniformly mix the nano calcium carbonate and the heated mixture A; and carrying out extruded granulation, so as to produce environment-friendly plastic masterbatch. According to the method, the environment-friendly plastic masterbatch has high plasticity and low vitrification temperature; the bending strength is 68MPa, so that the requirements of modern medical appliances are met fully; blow molding and injection molding can be carried out under lower temperatures and high pressure, so that mass production can be achieved; and the density of the modified material is lowered, thus, the fluidity in high-pressure molds is good, the molding speed is high, the demolding speed is increased greatly, the demolding rate can be decreased to 20 seconds per mold to 30 seconds per mold from 50 seconds per mold, and the productivity is increased by 50% to 60%.

Description

technical field [0001] The invention relates to the technical field of green plastic preparation for manufacturing biological macromolecule carriers and biological containers, in particular to a method for preparing green plastics for manufacturing biological macromolecule carrier biological containers. Background technique [0002] Carriers and vessels are the general term for objects used to hold items or as decorations. Vessels can be made of different materials and made into various shapes to meet different needs. It involves chemical, pharmaceutical, medical, daily necessities and other fields. [0003] Polylactic acid is the most promising fully biodegradable and environmentally friendly polyester with good chemical inertness, strong mechanical properties and easy processability. However, the homopolymer of polylactic acid (PLA) has many defects, and the relative molecular weight distribution is relatively wide, which makes polylactic acid products too brittle, low in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/26C08K3/30
CPCC08L67/04C08K2201/003C08K2201/011C08L2201/02C08L2201/06C08L2201/08C08L2201/10C08L2205/025C08K2003/265C08K2003/325
Inventor 埃德蒙米勒刘德华
Owner LINHAI KEJING BIOTECH
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