Sheet manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-10358752-B2
Application number	US-201515300568-A
Country	US
Kind code	B2
Filing date	Apr 13, 2015
Priority date	Apr 14, 2014
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A sheet manufacturing apparatus can manufacture sheets using a small amount of energy even when making high grammage sheets.
A sheet manufacturing apparatus according to the invention is characterized by supplying 0.014 times or more and 0.28 times or less energy to heat and compress a laid web of fiber and resin, bond multiple fibers through the resin, and forma sheet with grammage of 80 g/m 2 than the energy consumed to dry a web containing approximately the same weight percent of water as fiber and form a sheet with grammage of 80 g/m 2 .

First claim

The invention claimed is:

1. A sheet manufacturing apparatus, comprising:
a resin supply unit that supplies resin to a plurality of fibers;
a heating unit that supplies heat energy that is greater than or equal to 174 J and less than or equal to 3600 J per one A4 size sheet to a laid web of the fibers and the resin, to heat the laid web to melt or soften at least a part of the resin in the laid web, bond the fibers through at least the part of the resin, and form a sheet with grammage of 80 g/m 20 or more; and
a compression unit that is arranged upstream relative to the heating unit in a conveyance direction of the laid web and compresses the laid web of the fibers and the resin.

2. The sheet manufacturing apparatus described in claim 1 , wherein
the heating unit that supplies the heat energy greater than or equal to 174 J and less than or equal to 2600 J to the laid web to which water is not added before the heating unit heats the web.

3. The sheet manufacturing apparatus described in claim 1 , further comprising
a moisture content control mechanism arranged upstream in a conveyance direction of the web relative to the heating unit,
wherein the moisture content control mechanism adjusts moisture content of the fibers before the heating unit heats the web, and
wherein the heating unit supplies the heat energy greater than or equal to 174 J and less than or equal to 3600 J.

Assignees

• Seiko Epson Corp

Inventors

• Tsujino Kiyoshi

Classifications

• B27N3/12 Primary

  from fibres · CPC title

• D04H1/736 Primary

  characterised by the apparatus for arranging fibres (D04H1/728, D04H1/732 take precedence) · CPC title

• B27N3/007

  and at least partly composed of recycled material · CPC title

• D04H1/60

  the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently · CPC title

• B27N3/00

  Manufacture of substantially flat articles, e.g. boards, from particles or fibres · CPC title