Biodegradable PLA film and preparation method thereof

A biodegradable and PLA technology, applied in the field of biodegradable PLA film and its preparation, can solve the problems of easy adhesion of PLA film, unfavorable performance control and stability, large difference in fluidity, etc., to solve the serious problem of brittleness, Effects of improving processing stability and improving compatibility

Active Publication Date: 2022-01-21
SINOCHEM QUANZHOU ENERGY TECH CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of PLA film modification research is that PLA is severely brittle. Blending modification is used, and the compatibility between various polymer materials is poor, resulting in limited performance improvement of blending modification effects; different polymer materials have different melting temperatu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biodegradable PLA film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] Method for preparing biodegradable PLA film:

[0041] (1) Four PLA and PBC were dried at 70 ° C for 5 hours;

[0042] (2) Preparation of bio-based opening agent (nucleating agent):

[0043] The discarded egg shell was rinsed, placed in an oven, dried under a temperature of 110 ° C for 5 hours, after removing cooled to room temperature, using a ball mill to pulverize the particle diameter of 2 μm.

[0044] Phenylphosphonic acid was dried in vacuo at 110 ° C at 110 ° C for 4 h at 110 ° C. After drying, the two substances were brought to a mass fraction than 1: 5 at room temperature, and the two substances were mixed uniform. A thickened powder was then placed in an oven at 180 ° C for 5 minutes to give a phenylphosphonic acid calcium carbonate nucleating agent.

[0045] The phenylphosphonic acid attached egg chrose is placed in a high-speed mixer, and the silane coupling agent KH550 is configured to 20% by weight of the silane coupling agent ethanol solutio...

Example Embodiment

[0050] Example 2

[0051] Method for preparing biodegradable PLA film:

[0052] (1) Four PLA and PBC were dried at 70 ° C for 5 hours;

[0053] (2) The bio-based opening agent (nucleating agent) of Example 1 is employed;

[0054] (3) 75 parts, PBC, 14 parts of PBC, 5 parts of Tung oalic anhydride, 0.5 parts of stearate, 0.5 epoxy acrylic copolymers, 5 parts of bio-based dose in high mixing machines Mix for 10 minutes;

[0055] (4) Mix the homogeneous material to the secondary screw extruder in the twin screw extruder for molten, extrusion, water cooling, dry particles, drying to obtain a modified polylactic acid blown film special resin; extruded granulation Conditions: The set temperature of the twin screw extruder is: one district: 80 ° C, second area: 160 ° C, three districts: 180 ° C, four districts: 180 ° C, five districts: 180 ° C, Six districts: 180 ° C, Seven District: 180 ° C, Eight District: 180 ° C, Nine Area: 180 ° C, Ten District: 180 ° C, 11: 180 ° C, Machine Head: 1...

Example Embodiment

[0058] Example 3

[0059] Method for preparing a fully degraded PLA film:

[0060] (1) Four PLA and PBC were dried at 70 ° C for 5 hours;

[0061] The bioefragrance (nucleating agent) of Example 1 was employed.

[0062] (3) 80 parts, PBC, 5 parts of PBC, 5 parts of Tong oleic anhydride, 0.5 parts of stearate, 0.5 epoxy acrylic copolymers, 5 parts of bio-based opening in high mixing machines Mix for 10 minutes;

[0063] (4) Mix the homogeneous material to the secondary screw extruder in the twin screw extruder for molten, extrusion, water cooling, dry particles, drying to obtain a modified polylactic acid blown film special resin; extruded granulation Conditions: The set temperature of the twin screw extruder is: one district: 80 ° C, second area: 160 ° C, three districts: 180 ° C, four districts: 180 ° C, five districts: 180 ° C, Six districts: 180 ° C, Seven District: 180 ° C, Eight District: 180 ° C, Nine Area: 180 ° C, Ten District: 180 ° C, 11: 180 ° C, Machine Head: 170 ° C, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a biodegradable polylactic acid film and a preparation method thereof. The biodegradable polylactic acid film comprises the following components: 70-95 parts of polylactic acid (PLA), 4-29 parts of poly (butyl carbonate) (PBC), 0.1-1 part of a chain extender epoxy acrylic copolymer, 0.1-10 parts of a plasticizer tung oil anhydride, 0.1-1 part of a heat stabilizer zinc stearate and 0.1-5 parts of a nucleating agent phenyl phosphonic acid loaded calcium carbonate powder. The preparation method comprises the steps of uniformly mixing the raw materials in proportion, carrying out melt blending by a twin-screw extruder to obtain the modified polylactic acid film blowing special resin, and carrying out blow molding by a film blowing machine to form the film. The PLA film prepared by the method has high tensile strength, good opening performance and good transparency.

Description

technical field [0001] The invention relates to the technical field of polymer material preparation, in particular to a biodegradable PLA film and a preparation method thereof. Background technique [0002] Among the industrialized degradable plastics, polylactic acid (PLA) has become a hot material to replace disposable plastic products due to its excellent performance and biodegradability. PLA comes from renewable resources. It uses starch extracted from plants as the initial raw material, and then it is fermented to obtain lactic acid, which is then produced through polymerization. PLA gets rid of the dependence on petroleum resources, and has complete degradation characteristics, realizing clean carbon. Recycling, in today's increasingly tense environment protection and resource utilization, it is more and more important to develop and expand the application of PLA. PLA has the characteristics of high modulus, high strength, good transparency and excellent processing pe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L67/04C08L67/02C08K5/1539C08K9/12C08K3/26C08K9/06C08J5/18
CPCC08J5/18C08J2367/04C08J2467/02C08K5/1539C08K9/12C08K2003/265C08K9/06Y02W90/10
Inventor 武丹丹张永恒史顺祥徐人威
Owner SINOCHEM QUANZHOU ENERGY TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap