The Effect of Blowing Agents on the Effectiveness of Poly(vinyl Chloride) Extrusion

Garbacz, Tomasz; Jachowicz, Tomasz; Tor-Świątek, Aneta

doi:10.12913/22998624/65673

Cited by 3 publications

(2 citation statements)

References 14 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the technology of operations must be respected [11]. Reduction of operation times can be achieved by increasing machine efficiency (faster overclocking) to accelerate the molding process (according to available options) or by transferring part of the operations to another assembly station if there is no change in the technological process.…”

Section: Methodsmentioning

confidence: 99%

Optimization of Production Processes Using the Yamazumi Method

Sabadka¹,

Molnár²,

Fedorko³

et al. 2017

Adv. Sci. Technol. Res. J.

Self Cite

View full text Add to dashboard Cite

Manufacturing companies are now placing great emphasis on competitiveness and looking for ways to utilise their resources more efficiently. This paper presents optimum efficiency improvement of the automotive transmission assembly production line by using line balancing. 3 assembly stations were selected to optimize where waste management requirements are not met for achieving the production capacity. Several measures were proposed on the assembly lines concerned to reduce operations by using eliminating unnecessary activities of the assembly processes, reducing the cycle time, and balancing manpower workload using line balancing through Yamazumi chart and Takt time. The results of the proposed measures were compared with the current situation in terms of increasing the efficiency of the production line.

show abstract

Section: Methodsmentioning

confidence: 99%

Optimization of Production Processes Using the Yamazumi Method

Sabadka¹,

Molnár²,

Fedorko³

et al. 2017

Adv. Sci. Technol. Res. J.

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a result of this processing procedure, the obtained product is given a diphase structure, turning from solid into cellular. New structure of the plastic may be microcellular along the entire cross-section or have a solid topcoat and a cellular core [1,2].…”

Section: Introductionmentioning

confidence: 99%

Microcellular Co-Extrusion Process and Selected Properties of Thin-Walled Products

Tor-Świątek¹,

Dulebová²

2019

AMS

Self Cite

View full text Add to dashboard Cite

The microcellular extrusion process takes place with the use of conventional technological line for extruding shapes and coatings under the changed processing conditions, such as temperature for particular zones of the plasticizing system and extruder head zones. The process differs from the conventional method with regard to the method of shaping the extruder product. In the conventional extrusion process, the plastic has a homogenous structure across the whole section, whereas during microcellular extrusion process the plastic, containing the input plastic and a special blowing agent, obtains a twophase structure changing its structure into microcellular. One phase is solid and the other is microcellular. Microcellular phase is obtained by inserting the blowing agent into the input plastic during its manufacture. It takes place in the penultimate zone of the plasticizing system of the extruder under suitable process conditions which enable expansion of the blowing agent. Currently applied blowing agents have the form of gases and liquids (then they are inserted into the plasticizing system of the extruder by means of a special installation) but also powders and granulates inserted into the plasticizing system of the extruder together with the input plastic after previously mixing thereof. The article presents characteristics of the microcellular extrusion process and it describes selected research results of the process and microcellular extruder product properties.

show abstract

Development of Poly (Lactide Acid) Foams with Thermally Expandable Microspheres

Kmetty

Litauszki

2020

Polymers

View full text Add to dashboard Cite

This study presents the investigation of different content of thermally expandable microsphere (EMS) type of a physical blowing agent added to polylactic acid (PLA). The effects of the different doses of EMS, processing temperatures, and d-lactide content of the polylactic acid were analyzed for foam properties and structures. We characterized the different PLAs and the physical blowing agent with different testing methods (gel permeation chromatography, rotational rheometry, isothermal thermogravimetric analysis, and thermomechanical analysis). The amounts of the foaming agent were 0.5, 1, 2, 4, 8 wt%, and processing temperatures were 190 °C, 210 °C, and 230 °C. The foam structures were produced by twin-screw extrusion. We used scanning electron microscopy to examine the cell structure of the foams produced, and carried out morphological and mechanical tests as well. The result of extrusion foaming of PLA using different amounts of EMS shows that an exponentially decreasing tendency of density reduction can be achieved, described by the following equation, ρ(x ) = 1.062 · e − x 7.038 + 0.03 (R2 = 0.947) at 190 °C. With increasing processing temperature, density decreases at a lower rate, due to the effect that the microspheres are unable to hold the pentane gas within the polymer shell structure. The d-lactide content of the PLAs does not have a significant effect on the density of the produced foam structures.

show abstract

The Effect of Blowing Agents on the Effectiveness of Poly(vinyl Chloride) Extrusion

Cited by 3 publications

References 14 publications

Optimization of Production Processes Using the Yamazumi Method

Optimization of Production Processes Using the Yamazumi Method

Microcellular Co-Extrusion Process and Selected Properties of Thin-Walled Products

Development of Poly (Lactide Acid) Foams with Thermally Expandable Microspheres

Contact Info

Product

Resources

About