Development of a biaxial stretching test machine and its applications
-
Kentaro Egoshi
,
Toshitaka Kanai
Abstract
The evaluation method for a biaxially oriented film was developed using in-situ measurement during the stretching process. It can obtain basic data such as stress-strain curves, birefringence, light scattering, three dimensional refractive indexes and birefringence distribution. Stress and strain as functions of stretching speed and stretching temperature, as well as the deformation of spherulite of semi-crystalline polymer can be obtained by measuring the birefringence and light scattering during the biaxial stretching process with a small piece of polymer sample. The experimental results show the stress, retardation and three dimensional molecular orientations behavior during the simultaneous biaxial stretching and the sequential biaxial stretching process. Stretchability, thickness uniformity and spherulite size can be obtained simultaneously. In this paper, advantages and details of the newly developed system will be discussed with some experimental data.
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- Comparison of long-term properties of laser sintered and injection molded polyamide 12 parts
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Articles in the same Issue
- Frontmatter
- Material properties
- Mechanical properties and fiber characteristics of glass fiber/carbon fiber reinforced polyethylene terephthalate hybrid composites fabricated by direct fiber feeding injection molding
- The post-morphological analysis of electrospun vascular grafts following mechanical testing
- Covalent functionalization of multiwalled carbon nanotubes with super-hydrophobic property
- Effect of carbon fiber as secondary filler on the electrical, thermal and rheological properties of carbon fiber/polypropylene composites
- Antistatic properties of transparent plastics using a donor-accepter molecular compound antistatic agent
- Recent developments in fire-retardant thermoset resins using inorganic-organic hybrid flame retardants
- Engineering and processing
- Comparison of long-term properties of laser sintered and injection molded polyamide 12 parts
- Combination technology of deep drawing and back-moulding for plastic/metal hybrid components
- Plastic pipe solidification in extrusion
- Development of a biaxial stretching test machine and its applications
