Title:
BASE PAPER FOR DEEP DRAWING AND DEEP-DRAWN PRODUCT
Document Type and Number:
Japanese Patent JP2022172841
Kind Code:
A
Abstract:
To provide a base paper for deep drawing that has low environmental load, has high extensibility, prevents cracking in the paper surface during deep drawing, and has high shape reproducibility, and a deep-drawn product including the same.SOLUTION: Base paper for deep drawing has a paper substrate layer composed of a paper substrate. The constituent pulp of the paper substrate has a length-weighted mean fiber length of 0.60 mm or more and 2.40 mm or less. Out of Young's moduli of the base paper in the longitudinal direction and the transverse direction, the greater one is defined as A and the smaller one is defined as B, where A is 2,600 N/mm2 or less and the ratio C of Young's moduli represented by the formula (1): C=A/B is 1.00 or more and 1.80 or less. The base paper has elongations at break of 3.0% or more in the longitudinal direction and the transverse direction, respectively, and the geometric mean of the elongations at break in the longitudinal direction and the transverse direction is 4.0% or more.SELECTED DRAWING: None
Inventors:
SATO SO
Application Number:
JP2021079116A
Publication Date:
November 17, 2022
Filing Date:
May 07, 2021
Export Citation:
Assignee:
OJI HOLDINGS CORP
International Classes:
D21H27/00; B32B27/10; B65D1/28; B65D65/40; D21H15/02
Attorney, Agent or Firm:
Patent Attorney Corporation Otani Patent Office
Previous Patent: JPWO2022172840
Next Patent: Base paper for deep drawing processing and deep drawn products
Next Patent: Base paper for deep drawing processing and deep drawn products