thermoplastic composites | Fibre developments
Comparison of mechanical and hydrolysis resistance of HydroStrand 258 against current alternatives
Source: Owens Corning
oration at higher temperatures than alternative products. “The product offers a low yellowness making the product easy to use in natural colour applications, allowing for up to 26% improvement in colour clarity,” claims Owens Corning. “HydroStrand 258 can replace several specialty grade
glass fi bres, thereby lowering inventory carrying costs and reducing manufacturing change-overs,” the company also claims. Feeding is said to be “hassle-free.” Performax SE4850 single-end roving is designed for DLFT PP applications, where compounds are made by feeding the glass strand directly into the compounding extruder. Owens Corning claims up to an 83% reduction in fuzz generation, up to 40% improvement in glass dispersion (owing to higher compatibility with PP), and an increase of up to 80% in impact strength.
Addressing hydrolysis Johns Manville is also after more polyamide business with its new E glass product introductions. The new ThermoFlow 675 chopped strand grade for PA66 provides an improvement of around 10% tensile strength and 20% in impact resistance after accelerated ageing in a hydrolysing solution compared with a benchmarking standard product. The company also has a new chopped strand grade for PBT, ThermoFlow 601. This yields improvements of up to 7% in dry-as-mould- ed properties and “signifi cant” improvements after ageing versus previous generations of fi bres. Philippe Bekaert, global market development leader
for fi bres, says Thermofl ow 601 will replace the existing product Thermofl ow 600. “Thermofl ow 718 will continue to be offered mainly in North America,” he says. This supplier also has a new grade for production of long fi bre reinforced thermoplastics. StarRov 485 roving is said to have “excellent” processing capabilities and mechanical performance in polypropylene.
Recycled carbon fi bres
The processes used to create carbon fi bre composites often produce not inconsiderable amounts of waste fi bre. Procotex (Apply Carbon) recycles carbon fi bre production waste into milled and precision cut carbon fi bres and has just introduced a new line of sized and unsized chopped carbon fi bres, suitable for compound- ing applications and also for non-wovens.
Comparison of mechanical and hydrolysis resistance of Performax SE4850 against current alternatives
38 INJECTION WORLD | January/February 2016 Source: Owens Corning
Procotex – a textile waste recycling company based in Belgium – acquired French company Apply Carbon, which specialises in milling and precision cutting of technical fi bres, including aramid as well as carbon, two years ago. The company says it installed a new tailor-made carbon
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