- Email: [email protected]
Injection moulding long fibre-reinforced thermoplastics
Vol
17,
No. 4, Page 2
TECHNICAL NOTES DISPERSION OF PIGMENTS IN PLASTICS
The mechanism and energy requirements for dispersing pigments in fluid systems is totally different from those in thermoplastics resins. Dispersibility of pigments can be quantitatively evaluated by measuring the colour intensities. The more economical pigments are frequently easier to disperse Since than those with higher cost and better durability. pigments consist of primary particles and agglomerates held together by surface energy, additives can saturate this surface energy preventing tight packing of the agglomerates. Kunst., 1986, 76,
PROPERTIES OF HYBRID FIBRE-REINFORCED PLASTICS
(Dec.), 1214-1217
The Imperial College of Science and Technology in the U.K. has studied the tensile, compressive, flexural and shear properties Most of the data in this of hybrid fibre-reinforced plastics. review concerns carbon and glass hybrid fibre-reinforced epoxy. Mostly unidirectional material is considered because the study of multidirectional laminates introduces additional variables which so far have not been well investigated. The paper presents models used to predict the basic mechanical properties of these hybrids. Composites, 1987, l8_, (Jan.), 13-23
INJECTION MOULDING Spiflex in France developed flat strips of unidirectional LONG FIBRE-REINFORCED continuous fibre profiles in a thermoplastics matrix. This THERMOPLASTICS material was originally intended for hooping and winding applications for pressure cylinders etc. By cutting the profiles into 8-10 mm lengths, they can be fed directly into injection moulding machines, and since the fibres are already distributed uniformly in the resin matrix, the screw melts and injects the material with only a minimum of fibre degradation. The initial moulding applications have been based on nylon 6 and nylon 6.6, but the company is now marketing reinforced polycarbonate, thermoplastics polyesters, and nylon 12 for the injection sector. Spiflex is a joint venture of two French companies, Coflexit and Spie-Batignolles, and has recently been purchased by Bey Mills, a supplier of thermoset composites and components based in Toronto. Production for Europe will continue at the Spiflex plant in France. Mod. Plast. Int., 1987, 17, (Feb.), 12
o 1@87Elsevier Science Publishers B.V.. Amsterdam./87/$0.00
ADDITIVES POLYMERS
FOR
+ 2.20
No part of this publication may be reproduced. stored in a retrieval system, or transmitted by any form or by any means, electronic. mechanical, photocopying, recording or otherwise, without the prior permission of the publishers. (Readers in the U.S.A.-please see special regulations listed on back cover.]
17,
No. 4, Page 2
TECHNICAL NOTES DISPERSION OF PIGMENTS IN PLASTICS
The mechanism and energy requirements for dispersing pigments in fluid systems is totally different from those in thermoplastics resins. Dispersibility of pigments can be quantitatively evaluated by measuring the colour intensities. The more economical pigments are frequently easier to disperse Since than those with higher cost and better durability. pigments consist of primary particles and agglomerates held together by surface energy, additives can saturate this surface energy preventing tight packing of the agglomerates. Kunst., 1986, 76,
PROPERTIES OF HYBRID FIBRE-REINFORCED PLASTICS
(Dec.), 1214-1217
The Imperial College of Science and Technology in the U.K. has studied the tensile, compressive, flexural and shear properties Most of the data in this of hybrid fibre-reinforced plastics. review concerns carbon and glass hybrid fibre-reinforced epoxy. Mostly unidirectional material is considered because the study of multidirectional laminates introduces additional variables which so far have not been well investigated. The paper presents models used to predict the basic mechanical properties of these hybrids. Composites, 1987, l8_, (Jan.), 13-23
INJECTION MOULDING Spiflex in France developed flat strips of unidirectional LONG FIBRE-REINFORCED continuous fibre profiles in a thermoplastics matrix. This THERMOPLASTICS material was originally intended for hooping and winding applications for pressure cylinders etc. By cutting the profiles into 8-10 mm lengths, they can be fed directly into injection moulding machines, and since the fibres are already distributed uniformly in the resin matrix, the screw melts and injects the material with only a minimum of fibre degradation. The initial moulding applications have been based on nylon 6 and nylon 6.6, but the company is now marketing reinforced polycarbonate, thermoplastics polyesters, and nylon 12 for the injection sector. Spiflex is a joint venture of two French companies, Coflexit and Spie-Batignolles, and has recently been purchased by Bey Mills, a supplier of thermoset composites and components based in Toronto. Production for Europe will continue at the Spiflex plant in France. Mod. Plast. Int., 1987, 17, (Feb.), 12
o 1@87Elsevier Science Publishers B.V.. Amsterdam./87/$0.00
ADDITIVES POLYMERS
FOR
+ 2.20
No part of this publication may be reproduced. stored in a retrieval system, or transmitted by any form or by any means, electronic. mechanical, photocopying, recording or otherwise, without the prior permission of the publishers. (Readers in the U.S.A.-please see special regulations listed on back cover.]