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Title:
METHOD FOR PRODUCING LOW-MOLECULAR-WEIGHT POLYMER, AND DEVICE AND METHOD FOR PRODUCING MELT-BLOWN NON-WOVEN FABRIC
Document Type and Number:
WIPO Patent Application WO/2021/132175
Kind Code:
A1
Abstract:
Provided are: a method which is for producing a low-molecular-weight polymer suitable for a melt-blown non-woven fabric, and by which a low-molecular-weight polymer can be efficiently produced by applying a shearing force to a high-molecular-weight polymer without adding an additive such as a peroxide which promotes a pyrolysis reaction, to thereby reduce the molecular weight of the high-molecular-weight polymer; and a device for producing a melt-blown non-woven fabric. A low-molecular-weight polymer and a melt-blown non-woven fabric are produced by using a continuous high-shearing processing device which applies a shearing force to a high-molecular-weight polymer as a raw material through the rotation of a screw main body 37 and thereby reduces the molecular weight thereof to produce a low-molecular-weight polymer, and which cools the low-molecular-weight polymer by allowing the low-molecular-weight polymer to pass through a passage 88 provided in the axial direction inside the screw main body 37.

Inventors:
SASAI YUYA (JP)
SAMESHIMA TAKAFUMI (JP)
IIZUKA YOSHIO (JP)
OSADA KAHO (JP)
TAKI KENTARO (JP)
Application Number:
PCT/JP2020/047729
Publication Date:
July 01, 2021
Filing Date:
December 21, 2020
Export Citation:
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Assignee:
SHIBAURA MACHINE CO LTD (JP)
UNIV NAT CORP KANAZAWA (JP)
International Classes:
C08J3/00; B29C48/05; D04H1/4291; D04H1/54
Foreign References:
JP2015214143A2015-12-03
JP2016203576A2016-12-08
JP2011235609A2011-11-24
Attorney, Agent or Firm:
OKUBO, Katsuyuki (JP)
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