Method for obtaining an article formed of a thermoplastic matrix with two melting temperatures
The invention relates to a method for obtaining an article formed of a thermoplastic matrix, said method providing for formulating inputs comprising at least one source of thermoplastic material and at least one source of filler; mixing and grinding said inputs; thermocompressing said ground mixture to obtain the article; the source of thermoplastic material being formulated so as to comprise a quantity QLM of thermoplastic material LM having a melting temperature TLM below 150° C. and a quantity QHM of thermoplastic material HM having a melting temperature THM above 180° C., the thermocompression temperature being higher than the melting temperature TLM.
1 . A method for obtaining an article formed of a thermoplastic matrix, said method providing for:
formulating inputs comprising at least one source of thermoplastic material and at least one source of filler;
mixing and grinding said inputs;
thermocompressing said ground mixture to obtain the article;
said method being characterized in that the source of thermoplastic material is formulated so as to comprise a quantity QLM of thermoplastic material LM having a melting temperature TLM lower than 150° C. and a quantity QHM of thermoplastic material HM having a melting temperature THM higher than 180° C., the thermocompression temperature being higher than the melting temperature TLM.
2 . The method according to claim 1 , wherein the thermocompression temperature is less than or equal to the melting temperature THM.
3 . The method according to claim 1 , wherein the inputs are formulated to have a mass ratio of at most 0.5 between thermoplastic material HM and thermoplastic material LM, in order to obtain a flexible article.
4 . The method according to claim 3 , wherein the mass ratio of HM thermoplastic material to LM thermoplastic material is 0.25.
5 . The method according to claim 1 , wherein the inputs are formulated to have a mass ratio of at least 2 between thermoplastic material HM and thermoplastic material LM, in order to obtain a rigid article.
6 . The method according claim 1 , the source of thermoplastic material comprises articles or components of articles to be recycled comprising at least one thermoplastic material.
7 . The method according to claim 6 , wherein the source of thermoplastic material comprises components of footwear articles to be recycled.
8 . The method according to claim 7 , the source of thermoplastic material comprises footwear articles to be recycled having an upper comprising thermoplastic material LM and a sole based on thermoplastic material HM.
9 . The method according to claim 6 , wherein the source of filler comprises articles or components of articles to be recycled.
10 . The method according to claim 1 , wherein the source of filler comprises at least one textile material.
11 . The method according to claim 10 , wherein the textile material comprises yarns and/or fibers formed from at least two different materials.
12 . The method according claim 10 , wherein the inputs comprise between 10% and 30% by weight of textile material.
13 . The method according to claim 1 , wherein the source of filler comprises at least one latex, the inputs comprising between 10% and 25% by weight of latex.
14 . The method according to claim 1 , further comprising thermocompressing the ground mixture to the shape of the article.
15 . The method according to claim 1 , further comprising thermocompressing the ground mixture in the form of a plate, the article then being shaped by molding said plate.
16 . The method according to claim 7 , wherein the components of footwear articles to be recycled comprises soles of footwear articles.
17 . The method according to claim 9 , wherein the source of filler comprises one of a group including articles of clothing, footwear, and accessories comprising at least one filler material.