Completely biodegradable film and preparation method thereof

A biodegradable and film technology, applied in the field of completely biodegradable film and its preparation, can solve the problem of improving the tear strength of polyglycolic acid film, affecting the wide application of polyglycolic acid film, and the film's non-tear resistance and flexibility, etc. problems, to achieve the effect of improving biodegradability, great economic and social significance, and improving tear strength

Pending Publication Date: 2022-01-21
江苏碧升生物新材料有限公司 +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There are few researches on the modification of polyglycolic acid in the film direction at home and abroad, but none of them have studied the method of improving the tear strength of polyglyco

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
  • Completely biodegradable film and preparation method thereof
  • Completely biodegradable film and preparation method thereof
  • Completely biodegradable film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The present invention provides a kind of fully biodegradable film, and the composition of its formula and the ratio of mass parts are:

[0023]

[0024]Weigh polylactic acid, polybutyl carbonate, ethylene bis stearic acid amide, erucic acid amide according to the above formula, carry out mechanical blending of each component for 5 minutes, put the mixed raw materials into the twin-screw extruder, extrude During the extruder side line, use a peristaltic pump to quantitatively add the above-mentioned 1,2-trimethylene adipate. The conditions for extrusion and granulation are: the set temperature of the twin-screw extruder is: Zone 1: 130-150°C , Zone 2: 160-180℃, Zone 3: 160-190℃, Zone 4: 160-190℃, Zone 5: 160-190℃, Zone 6: 160-190℃, Zone 7: 160-190℃, Zone 8 Zone: 160-190°C, machine head: 160-190°C, screw speed: 100-300rpm, extrude, granulate and dry to obtain polylactic acid blown film resin. The resin is blown into a film by a blown film machine. The se...

Embodiment 2

[0025] Embodiment 2: The present invention provides a kind of fully biodegradable film, and the composition of its formula and the ratio of mass parts are:

[0026]

[0027] This step of extrusion granulation and film blowing process is the same as in Example 1, the film thickness is controlled at 0.025 mm, and the mechanical properties of the film are tested. The test results are listed in Table 1.

Embodiment 3

[0028] Embodiment 3: The present invention provides a kind of fully biodegradable film, and the composition of its formula and the ratio of mass parts are:

[0029]

[0030] This step of extrusion granulation and film blowing process is the same as in Example 1, the film thickness is controlled at 0.025 mm, and the mechanical properties of the film are tested. The test results are listed in Table 1.

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

No PUM Login to view more

Abstract

The invention discloses a completely biodegradable film and a preparation method thereof. The completely biodegradable film is prepared from poly(butylene adipate-co-terephthalate), polyglycolic acid, a chain extender styrene-acrylic acid-glycidyl methacrylate copolymer, a plasticizer poly(succinic acid-1, 2, 4-trimethyl-1, 3-pentanedionate), a plasticizer poly (butylene adipate-co-butylene terephthalate), a plasticizer polysuccinic acid-1, 2-propylene glycol ester, a nucleating agent, a lubricant ethylene bisstearamide and an anti-blocking agent erucyl amide. The preparation method comprises the following steps: weighing the components according to the formula, mechanically mixing to form a premix, metering and adding the plasticizer polysuccinic acid-1, 2-propylene glycol ester from a liquid feeding port of a twin-screw extruder, carrying out melt extrusion, water cooling, pelletizing and drying to obtain special resin for film blowing, and carrying out blow molding film forming through a film blowing machine to obtain the completely biodegradable film. The chain extender, the nucleating agent and the plasticizer can effectively improve the tensile elongation at break and tear strength of the film and obviously improve the rheological behavior of the material, and the film has good mechanical properties and excellent biodegradability and can replace PE, PP, PVC and the like to prepare films and sheets.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a fully biodegradable film and a preparation method thereof. Background technique [0002] Polyglycolic acid, also known as polyglycolic acid, is derived from the alpha-hydroxy acid known as glycolic acid. Glycolic acid is produced by the normal human body during metabolism, and the polymer of glycolic acid is polyglycolic acid. Different from traditional petroleum-based plastics, polyglycolic acid has a simple and regular linear molecular structure. It is a simple linear aliphatic polyester with high crystallinity and forms a crystalline polymer. The crystallinity is generally 40% to 80%. , and the melting point is around 225°C. Polyglycolic acid is a synthetic polymer material with good biodegradability and biocompatibility. Unlike traditional polymer materials with stable performance, such as plastics and rubber, polyglycolic acid is used as a material after a certain period...

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): C08L67/02C08L67/04C08L25/14C08K5/25C08K5/20C08J5/18
CPCC08J5/18C08J2367/02C08J2467/04C08J2467/02C08J2425/14C08K5/25C08K5/20
Inventor 潘宏伟贾世玲张会良王进
Owner 江苏碧升生物新材料有限公司
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