Cellulose fiber-reinforced polypropylene resin formed body and method for producing the same

Patent metadata

Field	Value
Publication number	US-2022010113-A1
Application number	US-202117484054-A
Country	US
Kind code	A1
Filing date	Sep 24, 2021
Priority date	Mar 27, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

A cellulose fiber-reinforced polypropylene resin formed body that is a resin formed body having respective diffraction peaks observed at positions of a scattering vector s of 1.61±0.1 nm −1 , 1.92±0.1 nm −1 , and 3.86±0.1 nm −1 in a wide-angle X-ray diffraction measurement, and is characterized by having ΔT calculated by the following formula (1) of 40.0° C. or more; and a cellulose fiber-reinforced polypropylene resin formed body that is a resin formed body having the above diffraction peaks and is characterized by having ΔT m and ΔT c expressed by the following formulae (2) and (3) and satisfying ΔT m <ΔT c ; and a producing method of these.
Δ T=T m(PP Cell) −T c(PP Cell)   (1)

Δ T m =T m(PP) −T m(PP Cell)   (2)

Δ T c =T c(PP) −T c(PP Cell)   (3)

First claim

1 . A cellulose fiber-reinforced polypropylene resin formed body, which is a resin formed body having respective diffraction peaks observed at positions of a scattering vector s of 1.61±0.1 nm −1 , 1.92±0.1 nm −1 , and 3.86±0.1 nm −1 in a wide-angle X-ray diffraction measurement, and is characterized by having ΔT calculated by the following formula of 40.0° C. or more;
Δ T=T m(PP Cell) −T c(PP Cell)   (1)

in the above-described formula, T m(PP Cell) and T c(PP Cell) , in this order, indicate a melting point and a crystallization temperature, respectively, of the above-described cellulose fiber-reinforced polypropylene resin formed body.

2 . A cellulose fiber-reinforced polypropylene resin formed body, which is a resin formed body having respective diffraction peaks observed at positions of a scattering vector s of 1.61±0.1 nm −1 , 1.92±0.1 nm −1 , and 3.86±0.1 nm −1 in a wide-angle X-ray diffraction measurement, and is characterized by having ΔT m and ΔT c expressed by the following formulae (2) and (3) and satisfying ΔT m <ΔT c :
Δ T m =T m(PP) −T m(PP Cell)   (2)

Δ T c =T c(PP) −T c(PP Cell)   (3)

in the above-described formulae, T m(PP) indicates a melting point of the above-described polypropylene resin, T m(PP Cell) indicates a melting point of the above-described cellulose fiber-reinforced polypropylene resin formed body, T c(PP) indicates a crystallization temperature of the above-described polypropylene resin, and T c(PP Cell) , indicates a crystallization temperature of the above-described cellulose fiber-reinforced polypropylene resin formed body.

3 . The cellulose fiber-reinforced polypropylene resin formed body according to claim 1 , wherein a component having the diffraction peak at the position of the scattering vector s of 3.86±0.1 nm −1 has an orientation degree of more than 0.15 and less than 0.80.

4 . The cellulose fiber-reinforced polypropylene resin formed body according to claim 2 , wherein a component having the diffraction peak at the position of the scattering vector s of 3.86±0.1 nm −1 has an orientation degree of more than 0.15 and less than 0.80.

5 . The cellulose fiber-reinforced polypropylene resin formed body according to claim 1 , wherein an elongation at break at 100° C. is more than 700%.

6 . The cellulose fiber-reinforced polypropylene resin formed body according to claim 2 , wherein an elongation at break at 100° C. is more than 700%.

7 . A method for producing the cellulose fiber-reinforced polypropylene resin formed body according to claim 1 ,
wherein the method uses a twin-screw extruder, wherein the twin-screw extruder includes screws having a compression structure with two or more stages that at least includes a first compression portion and a second compression portion, wherein the method includes a step of adding water or maleic anhydride as a hydrophilic compound or a solution of the hydrophilic compound to a melt-kneaded product of a polypropylene resin and a cellulose fiber, at any positions from the first compression portion to the second compression portion of the screws, and conducting kneading under a pressure condition exceeding a saturated vapor pressure of the additive.

8 . A method for producing the cellulose fiber-reinforced polypropylene resin formed body according to claim 2 ,
wherein the method uses a twin-screw extruder, wherein the twin-screw extruder includes screws having a compression structure with two or more stages that at least includes a first compression portion and a second compression portion, wherein the method includes a step of adding water or maleic anhydride as a hydrophilic compound or a solution of the hydrophilic compound to a melt-kneaded product of a polypropylene resin and a cellulose fiber, at any positions from the first compression portion to the second compression portion of the screws, and conducting kneading under a pressure condition exceeding a saturated vapor pressure of the additive.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Ikura Yukihiro
• Satake Mayu
• Ito Suzune
• Nakajima Yasuo
• Suyama Kenichi
• Kim Jae Kyung
• Tanaka Hiroki
• Tomomatsu Isao

Classifications

• C08J2401/02

  Cellulose; Modified cellulose · CPC title

• C08J2323/10

  Homopolymers or copolymers of propene · CPC title

• C08J5/045

  with vegetable or animal fibrous material · CPC title

• C08J3/2053

  the additives only being premixed with a liquid phase · CPC title

• B29C48/40

  using two or more parallel screws {or at least two parallel non-intermeshing screws}, e.g. twin screw extruders · CPC title