Title:
ポリ乳酸重合溶融体からポリ乳酸発泡製品を直接製造する方法および装置
Document Type and Number:
Japanese Patent JP7241182
Kind Code:
B2
Abstract:
A method for directly preparing a foamed polylactic acid (PLA) product from a PLA melt includes PLA melt preparation, feeding, and two-stage extrusion. In the two-stage extrusion, a pressure at an outlet of a first-stage twin-screw extruder is 15 MPa to 17 MPa, a PLA melt is fed at a rate of 250 kg/h, a foaming additive is fed at a rate of 7.5 kg/h to 10 kg/h, and a foaming gas is fed at a rate of 2.8 L/h to 7.5 L/h. The method can ensure both foamability and quality of a material and reduce more than ⅓ of energy consumption; and an obtained product has an adjustable foaming rate of 3 to 25, a crystallinity of 40.3% to 48.5%, a tensile strength of 8.7 MPa to 19.6 MPa, and an apparent density of 0.05 g/cm3 to 0.4 g/cm3.
Inventors:
Song Ao
King Music Army
Huang Wei Wei
Chung Soqiang
Liu Yining
King Music Army
Huang Wei Wei
Chung Soqiang
Liu Yining
Application Number:
JP2021539896A
Publication Date:
March 16, 2023
Filing Date:
July 18, 2019
Export Citation:
Assignee:
CHTC BIO-BASED MATERIAL ENGINEERING & TECHNOLOGY (NINGBO) CO., LTD.
International Classes:
B29C44/00; B29C44/50; B29C48/515; C08J9/04
Domestic Patent References:
| JP2005162804A | ||||
| JP2010525099A | ||||
| JP2017527677A | ||||
| JP10036651A |
Foreign References:
| CN108752734A | ||||
| CN102675842A | ||||
| CN102037053A | ||||
| WO2011122626A1 | ||||
| WO2011030766A1 | ||||
| CN109776848A |
Attorney, Agent or Firm:
Choi Hailong
Takayuki Kawai
Takayuki Kawai
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