Abstract The invention relates to a thermoplastic composite material for the preparation of moulded objects, particularly of injection-moulded objects, and to a process for making same. The material according to the invention has the following composition by weight: ______________________________________ polypropylene between 50 and 60% and
preferably 55%
glass spheres from 5 to 15% and
preferably 11%
polyvinylic alcohol
from 25 to 40% and
preferably 33%
______________________________________ The invention is more particularly applicable to making moulded objects such as containers or medical syringes adapted to be subjected to sterilization.
A composite material with thermoplastic characteristics adapted to manufacture various objects by moulding, characterized by the following composition expressed in percentage by weight: ______________________________________
polypropylene 40 to 80%
glass spheres 5 to 40%
polyvinylic alcohol
5 to 60%
______________________________________
Claim 2
Dependent Claim
39 words
A composite material with thermoplastic characteristics adapted to manufacture various objects by moulding, characterized by the following composition expressed in percentage by weight: ______________________________________
polypropylene 40 to 80%
glass spheres 5 to 40%
polyvinylic alcohol
5 to 60%
______________________________________
Claim 3
Dependent Claim
33 words
The composite material of claim 1, wherein it has the following composition by weight: ______________________________________
polypropylene between 50 and 60%
glass spheres from 5 to 15%
polyvinylic alcohol
from 25 to 40%
______________________________________
Claim 4
Dependent Claim
20 words
The composite material of claim 1, wherein the glass spheres used in its composition present a granulometry of micrometric nature.
Claim 5
Dependent Claim
20 words
The composition material of claim 3, wherein the glass spheres have a granulometric dimension of between 1 and 10 microns.
Claim 6
Dependent Claim
59 words
A complex material with thermoplastic properties in accordance with claim 1, and adapted for the preparation of objects obtained by moulding, characterized by the following composition: one third granules of polypropylene one third granules of a mixture comprising 66% polypropylene and 33% glass spheres with a granulometry of between 1 and 10 microns one third granules of polyvinylic alcohol.
Claim 7
Dependent Claim
23 words
A process for preparing moulded objects, wherein the object is injection-moulded from a composite material corresponding to the characteristics defined in claim 1.
Claim 8
Dependent Claim
9 words
Injection-moulded objects obtained from the material of claim 1.