Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Degradable heat-resistant polylactic acid pipe as well as preparation method and application thereof

A polylactic acid and heat-resistant technology, which is applied in the field of degradable heat-resistant polylactic acid pipes and its preparation, can solve the problems of difficult coordination and unification of PLA straws, heat resistance can not maintain toughness, and poor resin compatibility, so as to facilitate subsequent processing , good mechanical properties and short crystallization time

Inactive Publication Date: 2021-11-26
宁波昌亚新材料科技股份有限公司 +1
View PDF14 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it is difficult to coordinate the toughness and heat resistance of PLA straws. They cannot maintain toughness while being heat resistant, or they have toughness but poor heat resistance.
PBS is mostly filled with talcum powder on the market to make heat-resistant straws, but the added fillers are likely to cause uneven dispersion in the matrix, easy to agglomerate, poor compatibility with resin, and easy to form defects. The influence of other aspects is extremely prominent, and the price of PBS is more expensive; the heat resistance of PLA is often improved through long-term annealing post-treatment, which will also affect production efficiency

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
  • Degradable heat-resistant polylactic acid pipe as well as preparation method and application thereof
  • Degradable heat-resistant polylactic acid pipe as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] Another aspect of the embodiments of the present invention also provides a method for preparing any one of the aforementioned degradable heat-resistant polylactic acid pipes, which includes: combining polylactic acid, an inorganic nucleating agent, an organic nucleating agent, and a reactive toughening agent with The micro-crosslinking agent is uniformly mixed, and then the obtained mixed material is melt-blended, extruded and granulated, and then extruded and annealed to obtain a degradable heat-resistant polylactic acid pipe.

[0031] In some more specific embodiments, the temperature of the annealing treatment is 90-110°C, and the time is 30s-90s.

[0032] In some more specific embodiments, the temperature of the melt blending is 170-180°C.

[0033] Polylactic acid has a slow crystallization rate, poor heat resistance, and is hard and brittle, while the straw material requires a certain toughness of the material. In the present invention, the combined use of organic...

Embodiment 1

[0039] 89.7 parts of polylactic acid, 3 parts of inorganic nucleating agent talc powder, 1 part of organic nucleating agent TMC300, reactive toughening agent (composite of 0.5 parts of diethylene glycol diglycidyl ether and 5 parts of PEG6000) and microcross The coupling agent (a compound formed by 0.4 parts of tert-butyl peroxybenzoate and 0.4 parts of trimethylolpropane triacrylate) is uniformly mixed, and then the obtained mixed material is melt-blended, then squeezed and annealed. A degradable heat-resistant polylactic acid straw was obtained, and the characterization data are shown in Table 1 and Table 2.

Embodiment 2

[0041] 89.6 parts of polylactic acid, 4 parts of inorganic nucleating agent montmorillonite, 1 part of organic nucleating agent TMC200, reactive toughening agent (5 parts of epoxy soybean oil) and micro-crosslinking agent (0.4 part of ADR4468) were uniformly mixed, Afterwards, the obtained mixed materials were melt-blended, extruded and annealed to obtain a degradable heat-resistant polylactic acid straw. The characterization data are shown in Table 1 and Table 2.

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
melt flow indexaaaaaaaaaa
sizeaaaaaaaaaa
optical purityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a degradable heat-resistant polylactic acid pipe as well as a preparation method and application thereof. The degradable heat-resistant polylactic acid pipe is prepared from the following components in parts by weight: 85 to 95 parts of polylactic acid, 0.1 to 6 parts of an inorganic nucleating agent, 0.1 to 2 parts of an organic nucleating agent, 0.1 to 15 parts of a reactive toughening agent and 0.1 to 2 parts of a micro-crosslinking agent. According to the present invention, the high-optical-rotation polylactic acid is adopted, the crystallization property of the polylactic acid is regulated and controlled by using the compound nucleating agent, the non-crystallized region is fixed by using the micro-crosslinking manner, the chain segment movement is limited so as to improve heat resistance, the active functional group toughening agent is added, and the straw extrusion level is achieved through reactive toughening; meanwhile, through short-time annealing treatment, the heat resistance of the degradable heat-resistant polylactic acid straw can be further improved.

Description

technical field [0001] The invention belongs to the technical field of polylactic acid modification, and in particular relates to a degradable heat-resistant polylactic acid pipe and its preparation method and application. Background technique [0002] With the extensive use of plastics, plastic pollution has gradually become a major hidden danger affecting ecology. Biodegradable materials are an effective solution to plastic pollution. PLA is a bio-based material that contributes to carbon neutrality. In the field of disposable straws, which were originally dominated by polypropylene, the demand is huge. Biodegradable PLA straws are also in huge demand. However, PLA is brittle and has poor heat resistance, which limits the application of PLA straws. [0003] In order to form PLA straws, other biodegradable polyesters such as PBAT, PBS, PCL and other materials are often used to toughen PLA materials, or to improve its heat resistance by filling bamboo powder, starch, tal...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L71/02C08L91/00C08K3/34C08K5/25C08K5/5317
CPCC08L67/04C08L2201/08C08L2203/18C08L2205/24C08L71/02C08L91/00C08K3/34C08K3/346C08K5/25C08K5/5317
Inventor 徐建海王美兰钱玉英余吕宏邱守季
Owner 宁波昌亚新材料科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com