Abstract
The purpose of this article is to show the influence of grinded glass fibers in polymer material. Tested samples were processed by injection molding. Waste from this production was subsequently ground and a mixture was obtained with different size of crushed material. These particles contains glass fibers of similar length as the specific size of particle. Thus very small particles contain very short fibers. Investigation was carried out by testing tensile properties on material polypropylene with 30% glass fibers. Testing was conducted at ambient temperatures. The effect of reprocessing of material is mainly represented by fiber shortening. As a result, considerable reduction of tensile properties can be observed. The reduction is most evident in the modules of elasticity and ultimate tensile strength.
Highlights
The purpose of this article is to show the influence of grinded glass fibers in polymer material
Tested samples were processed by injection molding
Products made by injection molding have either character of final product or are semi products for consequent assembly into complex product
Summary
Products made by injection molding have either character of final product or are semi products for consequent assembly into complex product. Waste and runner system originating during injection molding can be processed several times. This way of processing is frequently used because of high portion of the waste, especially while manufacturing small injects. For this reason is unpolluted waste cut and crushed. Material modified by this process is once again granulated and mixed with pure granulate and utilized. Using this mixed material has usually no significant influence on physical-mechanical properties or surface appearance. Transparent and highly stressed materials cannot be mixed, because of high demands
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