Study On Accelerating Aging And Application Of CaCO₃Filling Polyethylene

CaCO₃/HDPE C omposite f ilm w ith f illed with0%、30%a nd65%C aCO3,through the indoor accelerated oxidation test, combined with the sample structureand pe rformance a nalysis, us ing tensile te st to analysis the m acroscopicmechanical p roperties of t he three f ilms af ter ag ing. Using Fourier t ransformInfrared Spectroscopy （FTIR） an d s canning el ectron m icroscopy （SEM） toinvestigate the th ree f ilms, see h ow their surface ch emical co mposition an dsurface morphology changes after UV-accelerated aging. Research the acceleratedphotodegradation performance impact of different CaCO₃/HDPE Composite filmsIndoor accelerated degradation tests showed that different CaCO₃content fillHDPE film are the UV exposure time of t he growth and aging in polymer withlighting t ime, m echanics performance ha s be en on the decrease. Chemical agestructure lighting, c arbonyl c ontinued i ncrease. Through t he s urfacemicro-patterns, c alcium c arbonate c ontent of30%and65%of t he High-densitypolyethylene f ilm a re on the po lymer, go od dispersion, r educing t he s ystem’sviscosity, improving system of mobility. It can be seen that surface porosity andinternal loose structure ar e the m ain r easons o f l oose molecular weight i naccelerated aging conditions. The degradation is65%CaCO₃filling HDPE film>30%CaCO₃filling HDPE film> HDPE film.Use t he65%Ca CO3filled H DPE f ilm composite the s inglet s hopping ba gwhich size is460mm×（250+150mm）, in accordance with GB/T21661-2008and G B/T12025–1989, test high-filled polyethylene film shopping bags for theuse p erformance. B y testing t he o bservation, w ater leakage an d p hysicalperformance, pr eliminary di scussion w ith calcium c arbonate65%of c alciumcarbonate/polyethylene composite f ilm a s a s upermarket s hopping ba g w ith therequirements and that it has a good performance, but, it still has something shouldbe further refined.Comprehensive above experimental r esults, based on c arbonate c ontent anddensity pol yethylene de gradation pr ocesses, c arbonyl i ndex, m echanics a ndperformance degradation in the interest of time, we analysis the light degradationmechanism. And discus the e nvironmental protection a nd e conomic be nefits o fhigh fill CaCO₃/HDPE film, To be the technical support and guidance of high fillCaCO₃/HDPE film industrialization and application.