Reactive modification and compatibilization of poly(lactide) and poly(butylene adipate-co-terephthalate) blends with epoxy functionalized-poly(lactide) for blown film applications

2016 ◽  
Vol 133 (16) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jeff Schneider ◽  
Shilpa Manjure ◽  
Ramani Narayan
Keyword(s):  
Blown Film ◽  
Reactive Modification

scholarly journals Biodegradable Polymer Compounds Reinforced with Banana Fiber for the Production of Protective Bags for Banana Fruits in the Context of Circular Economy

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 242
Author(s):  
Pablo Bordón ◽  
Rubén Paz ◽  
Carolina Peñalva ◽  
Gisela Vega ◽  
Mario Monzón ◽  
...  
Keyword(s):  
Circular Economy ◽  
Environmental Problem ◽  
Ecotoxicity Test ◽  
Banana Fiber ◽  
Film Extrusion ◽  
Blown Film ◽  
Blown Film Extrusion ◽  
Environmentally Friendly Process ◽  
Test Requirements ◽  
Better Than

Bags used to protect and accelerate the ripening of bananas are a clear example of the environmental problem of packaging waste. Small pieces of these non-biodegradable bags are frequently disposed on the soil by accident (environmental conditions and poor handling during the harvest) and remain there for years. This work focuses on the development of protective biodegradable bags reinforced with banana fiber, obtained from waste of the banana plants, thus promoting a circular economy and a more environmentally friendly process. To achieve this, different bio-based composites were tested (processability) by compounding extrusion (biopolymer and banana fiber with different process steps) and blown film extrusion. The bags produced were tested in field and sequentially improved in three generations of biofilms. The results showed that the maximum processable fiber content was 5 wt %. Additionally, the micronizing of the compounds was crucial to simplify the blown film extrusion and improve the smoothness of the bags (scratches avoidance on the banana surface). The final bags (Mater-Bi biopolymer, 5% combed and sieved banana fiber, and 2.5 wt % TiO2 for ultraviolet light filtration), performed better than the conventional ones (faster maturing, i.e., earlier harvest, and easier handling) and fulfilled the biodegradability, composting and ecotoxicity test requirements.

Experimental and numerical investigations on a high-density polyethylene (HDPE) blown film cooling with a new design of the counter-flow/radial jet air-ring

2021 ◽  
pp. 875608792110260
Author(s):  
ME Ismail ◽  
MM Awad ◽  
AM Hamed ◽  
MY Abdelaal ◽  
EB Zeidan
Keyword(s):  
Heat Transfer ◽  
Numerical Simulations ◽  
Film Cooling ◽  
Radiation Heat Transfer ◽  
Absolute Error ◽  
Numerical Results ◽  
Upper Lip ◽  
Original Design ◽  
Blown Film ◽  
Set Up

This study experimentally and numerically investigates a typical HDPE blown film production process cooled via a single-lip air-ring. The processing observations are considered for the proposed subsequent modifications on the air-ring design and the location relative to the die to generate a radial jet, directly impinging on the bubble. Measurements are performed to collect the actual operating parameters to set up the numerical simulations. The radiation heat transfer and the polymer phase change are considered in the numerical simulations. The velocity profile at the air-ring upper-lip is measured via a five-hole Pitot tube to compare with the numerical results. The comparison between the measurements and the numerical results showed that the simulations with the STD [Formula: see text] turbulence model are more accurate with a minimum relative absolute error (RAE) of 1.6%. The numerical results indicate that the peak Heat Transfer Coefficient (HTC) at the impingement point for the modified design with radial jet and longer upper-lip is 29.1% higher than the original design at the same conditions. Besides, increasing the air-ring upper-lip height increased the averaged HTC, which is 13.4% higher than the original design.

scholarly journals Interferometric Instrument for Thickness Measurement on Blown Films

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 245
Author(s):  
Michele Norgia ◽  
Alessandro Pesatori
Keyword(s):  
Film Thickness ◽  
Temperature Compensation ◽  
Close Contact ◽  
Thickness Measurement ◽  
The Novel ◽  
Blown Films ◽  
Low Coherence ◽  
Real Time Measurement ◽  
Blown Film ◽  
Standard Techniques

Real-time measurement of plastic film thickness during production is extremely important to guarantee planarity of the final film. Standard techniques are based on capacitive measurements, in close contact with the film. These techniques require continuous calibration and temperature compensation, while their contact can damage the film. Different optical contactless techniques are described in literature, but none has found application to real production, due to the strong vibration of the films. We propose a new structure of low-coherence fiber interferometer able to measure blown film thickness during productions. The novel fiber-optic setup is a cross between an autocorrelator and a white light interferometer, taking the advantages of both approaches.

Solution of a Microprocessor Controlled Blown Film Production Line

1980 ◽  
Vol 13 (4) ◽  
pp. 103-108
Author(s):  
K. Malík ◽  
V. Lev ◽  
Z. Matoušek
Keyword(s):  
Production Line ◽  
Film Production ◽  
Blown Film

Mechanisms of ductile tear in blown film from blends of polyethylene and high melt strength polypropylene

Polymer ◽  
2002 ◽  
Vol 43 (24) ◽  
pp. 6515-6526 ◽  
Author(s):  
A.C Chang ◽  
S.P Chum ◽  
A Hiltner ◽  
E Baer
Keyword(s):  
Melt Strength ◽  
Blown Film ◽  
High Melt Strength Polypropylene

Dynamic modeling of blown-film extrusion

2003 ◽  
Vol 43 (2) ◽  
pp. 398-418 ◽  
Author(s):  
J. Carl Pirkle ◽  
Richard D. Braatz
Keyword(s):  
Dynamic Modeling ◽  
Film Extrusion ◽  
Blown Film ◽  
Blown Film Extrusion

Blown Film Technology

2020 ◽  
pp. 819-834
Author(s):  
John D. Culter
Keyword(s):  
Blown Film

Crystallization Studies of LLDPE during Tubular Blown Film Processing

2001 ◽  
Vol 16 (1) ◽  
pp. 39-47 ◽  
Author(s):  
M. D. Bullwinkel ◽  
G. A. Campbell ◽  
D. H. Rasmussen ◽  
J. Krexa ◽  
C. J. Brancewitz
Keyword(s):  
Blown Film ◽  
Film Processing
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