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Process for the manufacture of polymer-based, controlled-flow compositions

A manufacturing method and composition technology, applied in the field of compositions for manufacturing motor vehicle parts, capable of solving the problems of hindering paint adhesion, deterioration of surface properties of plastic parts, deterioration of mechanical properties, etc.

Active Publication Date: 2017-10-03
CO PLASTIC OMNIUM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This modification of the structure of polyethylene chains and ethylene copolymers leads to a deterioration of the mechanical properties of the composition, as well as of the surface properties of plastic parts obtained by injection of this composition
In particular, poor surface properties can prevent paint from adhering to the part and accentuate cosmetic imperfections in well-painted parts

Method used

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  • Process for the manufacture of polymer-based, controlled-flow compositions
  • Process for the manufacture of polymer-based, controlled-flow compositions
  • Process for the manufacture of polymer-based, controlled-flow compositions

Examples

Experimental program
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Embodiment Construction

[0067] exist figure 1 An extrusion plant according to the invention is shown in , which is indicated by the general designation 10 .

[0068] The device 10 constitutes an extruder and comprises a stator 12 constituting a casing 14 and a rotor 16 constituting a system of vis sans fins (single or twin) 18 . The worm 18 is movable in rotation in the casing 14 . The sleeve 14 and the worm 18 delimit an annular space 19 in which the composition to be extruded advances.

[0069] The plant 10 comprises upstream a first main inlet 20 enabling the introduction of components (in this example an oxidant and a product comprising one or more polyolefins). The plant 10 comprises a hopper 22 allowing the introduction of the oxidizing agent and said product in the first main inlet 20 . The device 10 also includes an outlet 31 provided with an extrusion head 24 .

[0070] The device 10 includes an intermediate inlet 26 arranged immediately downstream of the first main inlet 20 . The middl...

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Abstract

The present invention relates to a method for the manufacture of a composition comprising the steps of: mixing at least one oxidizing agent in a first product, wherein said first product mainly comprises a first polyolefin; adding a second product and an antioxidant to the mixture , the second product mainly comprises a second polyolefin having properties different from those of the first polyolefin; at least one compatibilizer for the first polyolefin and the second polyolefin is added to the mixture.

Description

technical field [0001] The present invention relates to the field of compositions comprising plastic materials, especially thermoplastic materials. The invention relates in particular to compositions for the manufacture of automotive parts. Background technique [0002] In order to reduce the carbon dioxide emission of the vehicle, try to reduce the weight of the vehicle. Among the measures used, consideration was given to reducing the thickness of certain components, in particular body parts. [0003] A method for the production of components made of thermoplastic material is known in the prior art. During the method, the composition is produced by extrusion and introduced into a mould. The composition includes one or more polyolefins, for example a mixture of polyethylene and polypropylene. In order to improve the blending between different polyolefins, the composition usually includes compatibilizers, for example copolymers of the EOR (ethylene-octene rubber) type. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/00C08F8/50C08J3/20C08J11/04C08L23/14C08K5/14B29C48/07
CPCB29C48/297B29C48/83B29C48/07C08J3/005C08J3/203C08L23/12C08J2323/12C08J2423/04C08K5/14C08K5/005C08F8/50C08L23/04C08L23/0815C08F110/06
Inventor 弗雷德里克·维奥菲利普·卡萨尼奥瓦雷里·马萨迪耶-那若特斯坎德尔·曼尼
Owner CO PLASTIC OMNIUM