Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for producing extruded polyhydroxyalkanoate resin foam

A technology for extrusion foaming and hydroxycaproate, which is applied in the field of preparation of polyhydroxyalkanoate resin extrusion foams, can solve problems such as undisclosed foaming ratio, and achieve the effect of excellent water resistance

Inactive Publication Date: 2008-03-19
KANEKA CORP +1
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a foam with a foaming ratio greater than 8 times has not been disclosed

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Alcaligenes eutrophus AC32 (J. Bacteriol., 179, 4821 (1997) was used in which the PHA synthase gene derived from Aeromonas caviae was introduced into Alcaligenes eutrophus. ) as microorganisms, suitably adjust raw materials, culture conditions, produce PHBH (HH rate 10mol%, Mw=530,000).After PHBH melts and kneads at 135 ℃ of cylinder temperature in the uniaxial extruder of φ 35mm, from Extrude from the small hole die head of 3mmφ at the front end of the extruder, and the extruded strands pass through the granulator, cut off, and produce PHBH particles A (Mw=450,000, Tg=1°C, Tm=135°C) with a particle weight of 5mg , Tc=68 ℃).This particle A is supplied to the two-stage extruder connected in series with a diameter of 65mm and a diameter of 90mm with a ratio of about 40kg / hr.The aforementioned resin mixture supplied to the extruder of a diameter of 65mm is heated to 135°C (T1), melt kneading, add foaming agent, and supply to an extruder with a diameter of 90 mm connected t...

Embodiment 2

[0083] Alcaligenes eutrophus (Alcaligenes eutrophus) AC32 (J.Bacteriol., 179, 4821 (1997) into which PHA synthetase gene derived from Aeromonas caviae was introduced into Alcaligenes eutrophus was used ) as microorganisms, properly adjust raw materials, culture conditions, and produce PHBH (7mol% HH rate, Mw=720,000).After PHBH melts and kneads at 145°C of barrel temperature in a single-screw extrusion molding machine of φ 35mm, the Extrude at the small hole die of 3mmφ at the front end of the extruder, and the extruded strands pass through the granulator, cut off, and produce PHBH particles B (Mw=570,000, Tg=1°C, Tm=145°C) with a particle weight of 5mg , Tc=73 ℃).This particle B is supplied to the two-stage extruder of caliber 65mm and caliber 90mm connected in series with the ratio of about 40kg / hr.The aforementioned resin mixture supplied to the extruder of caliber 65mm is heated To 145°C (T1), melt kneading, add a foaming agent, and supply to an extruder with a diameter of...

Embodiment 3

[0086] Alcaligenes eutrophus (Alcaligenes eutrophus) AC32 (J.Bacteriol., 179, 4821 (1997) into which PHA synthetase gene derived from Aeromonas caviae was introduced into Alcaligenes eutrophus was used ) as microorganisms, properly adjust raw materials and culture conditions, and produce PHBH (HH rate 12mol%, Mw=560,000).After PHBH is melted and kneaded at 140° C. Extrude at the small hole die head of 3mmφ at the front end of the extruder, and the extruded strands pass through the granulator, cut off, and produce PHBH pellets C (Mw=520,000, Tg=2°C, Tm=142°C) with a particle weight of 5mg , Tc=72 ℃).This particle C is supplied to the two-stage extruder connected in series with a diameter of 65mm and a diameter of 90mm with a ratio of about 40kg / hr.The aforementioned resin mixture supplied to the extruder of a diameter of 65mm is heated to 140°C (T1), melt kneading, add foaming agent, and supply to an extruder with a diameter of 90 mm connected to an extruder with a diameter of ...

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 topic of the present invention is to provide a preparation method for the bubble bubbles with high magnification, high continuous bubble rate, environmental adaptability and excellent biodegradability, and squeezing bubbles from microorganisms (P3HA) (P3HA) (P3HA).The present invention also provides a preparation method for P3HA resin squeezing bubbles. This method will mix P3HA with volatile foaming agents to create a mixture to squeeze out the mixture in a low -pressure area through forming and formation.The preparation method of squeezing the foam forming body is characterized by: P3HA and volatile foaming agent from the resin temperature of the resin temperature when the crowded machine is squeezed (the resin temperature measured by the thermocouple is determined by the thermocouple)It is the range shown in the next formula. TC -20 ≤ TO (℃) ≤ TC+20 (in the formula, TC = (TG+TM) / 2, TG represents the glass transformation temperature of P3HA, TM means P3HA's melting point).

Description

technical field [0001] The invention relates to a preparation method of extruded polyhydroxyalkanoate resin with biodegradability from plants. Background technique [0002] Recently, environmental problems caused by discarded plastics have not stopped, so attention has been focused on biodegradable plastics that decompose into water and carbon dioxide due to the action of microorganisms. Generally, biodegradable plastics are classified into (1) microbial product aliphatic polyesters such as polyhydroxyalkanoates (especially poly(3-hydroxyalkanoates)), (2) polylactic acid and polycaprolactone Chemically synthesized aliphatic polyesters such as esters, and (3) natural polymers such as starch or cellulose acetate. Most chemically synthesized aliphatic polyesters do not decompose anaerobically, so they are not easily decomposed in water, and polylactic acid and polycaprolactone are poor in heat resistance. In addition, the starch of natural polymer products is non-thermoplasti...

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): B29C47/92B29K67/00C08J9/12B29K105/04C08L101/16B29C48/08B29C48/92
CPCC08J2367/04B29K2995/006B29C2947/92704B29C47/92B29K2105/0038B29K2105/0044B29K2105/045B29C47/0004B29C2947/92657B29K2105/0032B29K2105/16B29C2947/92514B29C2947/92904C08J9/142B29C47/0021C08J2201/03B29K2105/005B29C48/92B29C2948/92704B29C48/022B29C48/08B29C2948/92514B29C2948/92657B29C2948/92904
Inventor 广瀬文信千田健一宫川登志夫
Owner KANEKA CORP