	US 12,240,148 B2
	Method for production of articles and semi-finished products made of cellulose acetate
Orfeo Cecchin, Bassano del Grappa (IT)
Assigned to H2C S.R.L., Rome (IT)
Appl. No. 17/776,377
Filed by H2C S.R.L., Rome (IT)
PCT Filed Nov. 10, 2020, PCT No. PCT/IB2020/060555 § 371(c)(1), (2) Date May 12, 2022, PCT Pub. No. WO2021/105807, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 102019000022128 (IT), filed on Nov. 26, 2019.
Prior Publication US 2022/0396009 A1, Dec. 15, 2022
Int. Cl. B29B 17/04 (2006.01); B29C 43/00 (2006.01); B29C 43/02 (2006.01); B29C 43/52 (2006.01); B29K 1/00 (2006.01); B29K 105/26 (2006.01)

CPC B29B 17/0412 (2013.01) [B29C 43/003 (2013.01); B29B 2017/042 (2013.01); B29B 2017/0468 (2013.01); B29C 43/02 (2013.01); B29C 43/52 (2013.01); B29K 2001/12 (2013.01); B29K 2105/26 (2013.01)]

19 Claims

1. Method for production of articles or semi-finished products made of cellulose acetate, comprising the following steps:

recovering waste material consisting of cellulose acetate derived from previously made articles and/or semi-finished products;

one or more of grinding and crushing the waste material in order to obtain solid fragments of cellulose acetate;

distributing or positioning a mixture of at least one polymeric material inside a mold, said mixture being formed at least partially by the waste material consisting of the solid fragments of cellulose acetate;

heating said mixture inside said mold;

pressing said mixture inside said mold so as to form said articles or semi-finished products; and

cooling the articles or semi-finished products.