scholarly journals Plasticization Effect of Poly(Lactic Acid) in the Poly(Butylene Adipate–co–Terephthalate) Blown Film for Tear Resistance Improvement

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1904 ◽  
Author(s):  
Do Young Kim ◽  
Jae Bin Lee ◽  
Dong Yun Lee ◽  
Kwan Ho Seo
Keyword(s):  
Lactic Acid ◽  
Adipic Acid ◽  
Acid Ester ◽  
Extrusion Process ◽  
Poly Lactic Acid ◽  
Product Packaging ◽  
Film Extrusion ◽  
Blown Film ◽  
Blown Film Extrusion ◽  
Tear Resistance

The mechanical properties and tear resistance of an ecofriendly flexible packaging film, i.e., poly(lactic acid) (PLA)/poly (butylene adipate–co–terephthalate) (PBAT) film, were investigated via a blown film extrusion process. The application of PLA and PBAT in product packaging is limited due to the high brittleness, low stiffness, and incompatibility of the materials. In this study, the effects of various plasticizers, such as adipate, adipic acid, glycerol ester, and adipic acid ester, on the plasticization of PLA and fabrication of the PLA/PBAT blown film were comprehensively evaluated. It was determined that the plasticizer containing ether and ester functionalities (i.e., adipic acid ester) improved the flexibility of PLA as well as its compatibility with PBAT. It was found that the addition of the plasticizer effectively promoted chain mobility of the PLA matrix. Moreover, the interfacial adhesion between the plasticized PLA domain and PBAT matrix was enhanced. The results of the present study demonstrated that the plasticized PLA/PBAT blown film prepared utilizing a blown film extrusion process exhibited improved tear resistance, which increased from 4.63 to 8.67 N/mm in machine direction and from 13.19 to 16.16 N/mm in the transverse direction.

scholarly journals Poly(lactic acid) (PLA) Based Tear Resistant and Biodegradable Flexible Films by Blown Film Extrusion

Materials ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 148 ◽  
Author(s):  
Norma Mallegni ◽  
Thanh Phuong ◽  
Maria-Beatrice Coltelli ◽  
Patrizia Cinelli ◽  
Andrea Lazzeri
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Film Extrusion ◽  
Flexible Films ◽  
Blown Film ◽  
Blown Film Extrusion

Blown film extrusion of poly(lactic acid) without melt strength enhancers

2017 ◽  
Vol 134 (34) ◽  
pp. 45212 ◽  
Author(s):  
Sonal S. Karkhanis ◽  
Nicole M. Stark ◽  
Ronald C. Sabo ◽  
Laurent M. Matuana
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Melt Strength ◽  
Film Extrusion ◽  
Blown Film ◽  
Blown Film Extrusion

scholarly journals Development of PLA/EVA Reactive Blends for Heat-Shrinkable Film

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1925 ◽  
Author(s):  
Rattikarn Khankrua ◽  
Tanyawan Pongpanit ◽  
Ponchai Paneetjit ◽  
Rungnapha Boonmark ◽  
Manus Seadan ◽  
...  
Keyword(s):  
Ethylene Vinyl Acetate ◽  
Poly Lactic Acid ◽  
Elongation At Break ◽  
Blend Films ◽  
Film Extrusion ◽  
Blown Film ◽  
Twin Screw ◽  
Blown Film Extrusion ◽  
Reactive Blend

Heat-shrinkable films have widely been used for various applications such as shrinkable labels and cap seals. These plastics have generally a short life. The biodegradable polymers can thus be an ideal candidate for such applications. This work aimed to study the stretching and shrinking ratio of poly(lactic acid)/ethylene vinyl acetate through reactive blends system for heat-shrinkable films application. The reactive agents, Joncryl® and Perkadox were used as in situ compatibilizers. PLA/EVA with 100/0, 97/3, 95/5, 93/7, and 90/10 ratios were prepared in the twin screw extruder. Neat PLA and PLA/EVA films were fabricated by blown film extrusion. The results revealed that the elongation at break of PLA in the TD direction was improved when adding EVA. PLA and EVA film with 0.1 phr of Perkadox was found to be sufficient as evident by FESEM micrograph and DMTA results. The films were stretched and shrunk at a temperature of 70 °C. The percentage of shrinkage of the stretched PLA/EVA reactive blend films, two and three times were, 100%, approximately. On the other hand, the four-times stretched films shrunk less than 100% because of the excessive stretching, which resulted in film breakage and defect.

Mechanical Properties of Biodegradable Mulch Films Contained Poly(Lactic Acid) and Modified Natural Rubber Prepared by Blown Film Extrusion

2017 ◽  
Vol 873 ◽  
pp. 117-122
Author(s):  
Tarinee Nampitch ◽  
Thiti Kaisone ◽  
Pran Hanthanon ◽  
Chanon Wiphanurat ◽  
Sumate Ouipanich ◽  
...  
Keyword(s):  
Carbon Black ◽  
Poly Lactic Acid ◽  
Carbonyl Groups ◽  
Biodegradable Film ◽  
Film Extrusion ◽  
Blown Film ◽  
Biodegradable Mulch ◽  
Ester Linkage ◽  
Mulch Films ◽  
Blown Film Extrusion

The present research aimed to develop biodegradable mulch films that could resolve the environmental problem in agriculture. The research also compared the properties of transparent and black commercial mulch films. Blended films were prepared by blown-film extrusion, heating at 170 °C, and rotation at 55 rpm. The results revealed that the appearance of FTIR spectra were shown as functional groups of PBAT, described at 1710 cm-1 and 1267 cm-1, which corresponds to carbonyl groups in ester linkage and C-O in ester linkage, respectively. The presence of O-H carboxylic acids, attributed within the range 910-950 cm-1. The films containing 10% PLA loading showed peaks from 937 to 1712 cm-1, more than films containing 20% PLA loading. The carbon black contained in the biodegradable film could interrupt the mobility of the polymer chain, leading to decreased Tm, while the incorporation of carbon black in biodegradable mulch films could increase the tensile properties of blends.

Stability of a Blown Film Extrusion Process

1999 ◽  
Vol 14 (4) ◽  
pp. 342-349 ◽  
Author(s):  
K.-S. Yoon ◽  
C.-W. Park
Keyword(s):  
Extrusion Process ◽  
Film Extrusion ◽  
Blown Film ◽  
Blown Film Extrusion

Systems for the measurement and stabilization of film thickness in the blown-film extrusion process

Polimery ◽  
1995 ◽  
Vol 40 (10) ◽  
pp. 601-605
Author(s):  
STANISLAW LUTOMIRSKI ◽  
JOZEF MAZUR ◽  
RYSZARD STRZELECKI
Keyword(s):  
Film Thickness ◽  
Extrusion Process ◽  
Film Extrusion ◽  
Blown Film ◽  
Blown Film Extrusion

scholarly journals Characteristics of producing of the polymer films in blow film extrusion process

Mechanik ◽  
2019 ◽  
Vol 92 (4) ◽  
pp. 230-233
Author(s):  
Sebastian Białasz ◽  
Łukasz Garbacz
Keyword(s):  
Polymer Films ◽  
Extrusion Process ◽  
Polyethylene Film ◽  
Molding Process ◽  
Film Extrusion ◽  
Blow Molding ◽  
Blown Film ◽  
Blown Film Extrusion ◽  
Extrusion Blow Molding

In the article specification of blown film extrusion process of thermoplastics was presented. Methods of extrusion subject to products with determine characteristic received in the process where characteristic. In the research, extrusion blow molding process used polyethylene film PE-LD Malen-E were used. Extensive studies of the extrusion process and selected properties of polymer films were used.

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