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

Biodegradable polyester fiber having excellent thermal stability and strength, and method for producing same

A biodegradable and manufacturing method technology, applied in the field of biodegradable polyester fiber with excellent thermal stability and strength and its manufacturing field, can solve the problems of increased energy consumption and waste, reduce energy consumption and simplify production Equipment, effect of high fiber strength

Inactive Publication Date: 2013-12-11
THE UNIV OF TOKYO +1
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires rapid cooling to below the glass transition temperature (approximately 0°C) immediately after melt extrusion, and then immediately raises the temperature in a hot water bath. Since repeated cooling and heating and the use of a hot water bath often require Drying equipment before the stretching process uses a lot of energy or wastes a lot, and refrigeration equipment is required to cool down to below the glass transition temperature, so there is a problem that large-scale production equipment is required

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 polyester fiber having excellent thermal stability and strength, and method for producing same
  • Biodegradable polyester fiber having excellent thermal stability and strength, and method for producing same
  • Biodegradable polyester fiber having excellent thermal stability and strength, and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Examples are shown below to describe the present invention more specifically, but the present invention is not limited to these Examples.

[0059] The evaluation of the obtained fiber was implemented by the following method.

experiment example 1)

[0060] (Experimental example 1) "Dry heat shrinkage rate"

[0061] As the mechanical properties of the PHA fibers after the heat treatment, thermal stability was evaluated by dry heat shrinkage. As this evaluation standard, the shrinkage rate after hanging the PHA fiber in the unloaded state in hot air at 100°C for 30 minutes was measured, and if the shrinkage rate was less than 10%, it was marked as ○, and if it was 10% or more and less than 20%, it was marked as △, if it is 20% or more, it will be marked as ×, and the evaluation will be divided into 3 levels. When this evaluation is ◯, it can be said that it is a PHA fiber excellent in thermal properties.

experiment example 2)

[0062] (Experimental Example 2) "Fiber Strength"

[0063] As the mechanical properties of the PHA fiber, the fiber strength was evaluated by the maximum breaking strength according to JIS-L1015 using a Tensilon universal testing machine RTC-1210A manufactured by A&D Corporation. As this evaluation standard, if the maximum breaking strength is 2 cN / dtex or more, it is marked as ○, if it is 1.5 cN / dtex or more and less than 2.0 cN / dtex, it is marked as △, and if it is less than 1.5 cN / dtex, it is marked as ×, and divided into 3 level to evaluate. When this evaluation is ◯, it can be said that it is a PHA fiber having excellent fiber strength.

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
glass transition temperatureaaaaaaaaaa
crystallization temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

An objective of the present invention is to provide a biodegradable polyester fiber which has excellent thermal stability and excellent fiber strength. Another objective of the present invention is to provide a method for producing a biodegradable polyester fiber which has excellent mechanical properties, especially excellent thermal stability. The present invention relates to a biodegradable polyester fiber which is composed of a poly(3-hydroxybutylate-co-3-hydroxyhexanoate) that has a 3HH molar fraction of 2-9% by mole. The present invention also relates to a method for producing the biodegradable polyester fiber, which is characterized by comprising a fiber formation step wherein a poly(3-hydroxybutylate-co-3-hydroxyhexanoate) is formed into fibers at a temperature that is not less than the glass transition temperature of the poly(3-hydroxybutylate-co-3-hydroxyhexanoate) but not more than 70 DEG C during the melt extrusion of the poly(3-hydroxybutylate-co-3-hydroxyhexanoate).

Description

technical field [0001] The present invention relates to fibers made of polyhydroxyalkanoate (hereinafter sometimes abbreviated as "PHA") as a raw material and a method for producing the same. Background technique [0002] In recent years, environmental problems caused by discarded plastics have been magnified, and the realization of a recycling-oriented society on a global scale is urgently expected. Biodegradable resins that can be decomposed by microorganisms after use have attracted attention. Among the biodegradable resins, PHAs, which are bio-derived polymers, have attracted attention from the viewpoint of reduction of carbon dioxide emissions and immobilization (carbon neutral), and due to their biodegradability and biophase Capacitance, so its application to various molded products such as fibers and films has been studied. Among them, fibers made of PHAs are expected to be used in medical products such as surgical sutures, agricultural and fishery products such as b...

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): D01F6/84
CPCD01F6/84D01D5/08D01F6/625C08G63/06
Inventor 岩田忠久本乡千鹤田村正信
Owner THE UNIV OF TOKYO
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