Method for manufacturing compact
US-2022097262-A1 · Mar 31, 2022 · US
Sheet manufacturing method and sheet manufacturing apparatus
US11807988B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11807988-B2 |
| Application number | US-202217656902-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 29, 2022 |
| Priority date | Mar 31, 2021 |
| Publication date | Nov 7, 2023 |
| Grant date | Nov 7, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A sheet manufacturing method includes a web forming step of forming a web by accumulating a defibrated product in a dry manner, a moisture imparting step of imparting the web with moisture, a pressurizing step of pressurizing the web to which the moisture is imparted, and a heating step of heating the web to which the moisture is imparted, in which a water content of the web to which the moisture is imparted in the moisture imparting step is 12% by mass or more, a pressure applied to the web in the pressurizing step is 0.2 MPa or more, and a temperature of the web in the heating step is 100° C. or lower.
First claim
Opening claim text (preview).
What is claimed is: 1. A sheet manufacturing method comprising: a web forming step of forming a web by accumulating a defibrated product in a dry manner; a moisture imparting step of imparting the web with moisture; a pressurizing step of pressurizing the web to which the moisture is imparted; and a heating step of heating the web to which the moisture is imparted, wherein a water content of the web to which the moisture is imparted in the moisture imparting step is 12% by mass or more, a pressure applied to the web in the pressurizing step is 0.2 MPa or more, and a temperature of the web in the heating step is 100° C. or lower. 2. The sheet manufacturing method according to claim 1 , wherein a water content of the web to which the moisture is imparted in the moisture imparting step is 40% by mass or less. 3. The sheet manufacturing method according to claim 1 , wherein the pressure applied to the web in the pressurizing step is 10 MPa or less. 4. The sheet manufacturing method according to claim 1 , wherein the temperature of the web in the heating step is 60° C. or higher. 5. The sheet manufacturing method according to claim 1 , wherein the pressurizing step and the heating step are performed at the same time. 6. The sheet manufacturing method according to claim 1 , further comprising: before the pressurizing step and the heating step, a binder adding step of adding a binder to at least one of the defibrated product and the web. 7. The sheet manufacturing method according to claim 1 , wherein water vapor or mist is imparted to the web in the moisture imparting step. 8. A sheet manufacturing apparatus comprising: a belt on which a defibrated product is accumulated in a dry manner to form a web; a moisture imparting portion that imparts moisture to the web; a pressurizing portion that is arranged downstream of the moisture imparting portion and that pressurizes the web to which the moisture is imparted; and a heating portion that is arranged downstream of the moisture imparting portion and that heats the web to which the moisture is imparted, wherein a water content of the web to which the moisture is imparted in the moisture imparting portion is 12% by mass or more, a pressure applied to the web in the pressurizing portion is 0.2 MPa or more, and a temperature of the web in the heating portion is 100° C. or lower.
Assignees
Inventors
Classifications
- D21F7/003Primary
Indicating or regulating the moisture content of the layer · CPC title
Pulp catching, de-watering, or recovering; Re-use of pulp-water · CPC title
in combination with suction or blowing devices · CPC title
of the cylinder type · CPC title
of the cylinder type · CPC title
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Frequently asked questions
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- What does patent US11807988B2 cover?
- A sheet manufacturing method includes a web forming step of forming a web by accumulating a defibrated product in a dry manner, a moisture imparting step of imparting the web with moisture, a pressurizing step of pressurizing the web to which the moisture is imparted, and a heating step of heating the web to which the moisture is imparted, in which a water content of the web to which the moistu…
- Who is the assignee on this patent?
- Seiko Epson Corp
- What technology area does this patent fall under?
- Primary CPC classification D21F7/003. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Nov 07 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).