Universite Paul Sabatier

Ateca Rdm

S.a. Ateca

Yves Blottiere

Abel C Rousset

Jean-Pierre Bonino

Isabelle Gossart

Mireille Valaud

Claude Rossignol

Philippe Chapuis

The method includes mixing (100) degradable consumable cores (11) with a liquid coating composition (20) including an aqueous solvent (21), a hydrosoluble resin (22) and an anti-agglomerant additive (23), drying (200) the coated cores so as to obtain free balls (12) with a substrate film (2), mixing (300) these balls (12) first of all with a liquid covering substance (30) including a synthetic base product (31) and optionally an auxiliary product (32), then with an anti-agglutinant adjuvant (33), drying (400) the covered balls so as to obtain free ball structures (13) with a covering layer (3), and stoving (500) these ball structures so as to harden their covering layer and degrade the cores and thereby obtain hollow spherules (10). Application in the manufacture of intermediate products for producing in particular energy absorbers.

Method for the manufacture of hollow spherules of synthetic materials

A method for manufacturing continuous, closed and hollow bodies which comprises (a) using cores (25) which are soluble in a solvent, (b) depositing on each core a coating (3) with a suitable mechanical strength to be self-supporting and having open pores to pass a solvent, and (c) placing the cores so coated into a solvent for dissolving the cores; the method of the invention may be implemented in bulk parts, in an economical manner, and allows making hollow bodies, in particular hollow balls, each comprising a continuous skin devoid of any macroscopic perforation and of a kind and with a thickness which are easily adjusted in relation to the desired properties.

Method for making continuous and closed hollow bodies, hollow bodies so

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Montauban, France

Yves Blottiere