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Bowing phenomenon in double bubble tubular film processing for PA 6 / M. Takashige in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 1 (03/2004)
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Titre : Bowing phenomenon in double bubble tubular film processing for PA 6 Type de document : texte imprimé Auteurs : M. Takashige, Auteur ; T. Kanai, Auteur ; T. Yamada, Auteur Année de publication : 2004 Article en page(s) : p. 56-63 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Déformation de cintrage
Films plastiques
Polyamide 6Index. décimale : 668.4 Plastiques, vinyles Résumé : This report is to discuss the bowing phenomenon and the sag elimination tension for biaxial oriented PA 6 film process, which consists of double bubble tubular film process and the thermosetting tentering.
The bowing phenomenon does not occur in the heat set of the triple bubble tubular process. However, there is a serious problem of the bubble stability when the sufficient thermosetting by the tubular process is carried out, so the heat set by the tenter process is required. The bowing phenomenon arises when the annealing is carried out by the tenter method. The bowing distortion becomes large when the annealing temperature is high and film relaxation ratio is large.
It is possible to reduce the bowing distortion when thermosetting is carried out in a two-step tenter process. The shrinkage stress of the stretched film was relaxed in the heat treatment during the second step whose temperature is higher than the first one. A two-step heat treatment was able to decrease the bowing distortion compared with the one-step heat treatment.
When the bowing phenomenon occurred, shrinkage percentage in hot water changes along the cross-direction of a film. The humidity expansion coefficient in the film which increases as the increasing shrinkage percentage in hot water is related to the molecular orientation. The sag also increased with increasing the bowing distortion. The bowing distortion and the sag elimination of tension have proportional connection.DOI : 10.3139/217.1803 En ligne : https://drive.google.com/file/d/1xOhjAPXvNg6x_zSP6RM0Y3_KOwfO1Ufr/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3296
in INTERNATIONAL POLYMER PROCESSING > Vol. XIX, N° 1 (03/2004) . - p. 56-63[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 001027 - Périodique Bibliothèque principale Documentaires Disponible Deformation behavior, processability and physical properties for biaxially oriented film of LLDPE / H. Uehara in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 2 (06/2004)
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Titre : Deformation behavior, processability and physical properties for biaxially oriented film of LLDPE Type de document : texte imprimé Auteurs : H. Uehara, Auteur ; T. Yamada, Auteur ; T. Kanai, Auteur ; K. Sakauchi, Auteur Année de publication : 2004 Article en page(s) : p. 155-162 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : The bubble deformation behavior of double bubble tubular film (DBTF) of linear low density polyethylene (LLDPE) is experimentally analyzed. Also investigated is how the bubble deformation behavior of the stretched films are changed by stretching conditions, especially stretching temperature, and how the properties of stretched films are influenced by stretching conditions. From the results, the optimum conditions required to obtain a stable bubble and good properties for the DBTF of LLDPE are indicated. The relationship between the DBTF and laboratory tenter stretched film (LTSF) is investigated in order to predict the processability and the properties of the DBTF by using the laboratory tenter biaxial stretcher. This method is not only more time efficient, but also reduces overall costs of developing the DBTF. DOI : 10.3139/217.1813 En ligne : https://drive.google.com/file/d/1ZK5g0EziI1rPZeJuNj0GryZ2BTwxG5Pd/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3283
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Code-barres Cote Support Localisation Section Disponibilité 001028 - Périodique Bibliothèque principale Documentaires Disponible Easy tear film of biaxially oriented PA 6/MXD 6 blend by double bubble tubular film process / M. Takashige in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 2 (06/2004)
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Titre : Easy tear film of biaxially oriented PA 6/MXD 6 blend by double bubble tubular film process Type de document : texte imprimé Auteurs : M. Takashige, Auteur ; T. Yamada, Auteur ; T. Kanai, Auteur Année de publication : 2004 Article en page(s) : p. 147-154 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : In the market, a film which adapted to environmental and barrier problems is desired. This report discusses the stretching stability and physical properties for biaxially oriented PA 6/ MXD 6 blending film produced by double bubble tubular film process. As MXD 6 blending ratio increased, the stretching stress decreased. Hydrogen bond is due to be suppressed by the steric hindrance of the MXD 6 resin. Blending film can be stretched stably and oxygen gas permeability is more excellent than PA 6. Further the film blended between 20% and 40% as MXD 6 blend ratio has the property of easy straight line cut. It is found that the plate-like cylinder structure was formed in the observation of TEM. However, thickness uniformity deteriorates when MXD 6 blending ratio exceeds 40 %. To improve the thickness uniformity, the influence of the kneading conditions was studied. When the melting point of MXD 6 decreased, the stretching stability deteriorated and mechanical properties drastically lowered. The excess reaction of the blending resins is not desirable. Stretchability, easy tear property and oxygen gas barrier property are maintained by following process conditions. In case of dry blending, MXD 6 30% is proper content. And in case of premixing, MXD 6 melting point keeps over 236 °C. It was confirmed that there is the condition satisfying all properties. The blending film keeps the compatible performance of strength and easy tear property. Namely, the material and production technology of a film could solve environmental and barrier free problems. DOI : 10.3139/217.1805 En ligne : https://drive.google.com/file/d/1rTarkjCJEsPsggLfNbVV8uhArqKA8AkU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3282
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Code-barres Cote Support Localisation Section Disponibilité 001028 - Périodique Bibliothèque principale Documentaires Disponible Easy tear multilayer film of biaxially oriented PA6/MXD6 by double bubble tubular film process / M. Takashige in INTERNATIONAL POLYMER PROCESSING, Vol. XX, N° 1 (03/2005)
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Titre : Easy tear multilayer film of biaxially oriented PA6/MXD6 by double bubble tubular film process Type de document : texte imprimé Auteurs : M. Takashige, Auteur ; T. Kanai, Auteur Année de publication : 2005 Article en page(s) : p. 100-104 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : In the market, a film which is adapted to environmental and barrier problems and easy tear property is desired. A previous report discussed easy tear PA6 film. This report discusses the film having not only easy tear, but also high barrier properties. A biaxially oriented PA6/MXD6 blend film produced by double bubble tubular film process does possess gas barrier. So a multilayer film having high gas barrier layer and keeping easy tear cut has been studied. High gas barrier layer of high content MXD 6 in the center layer is added to PA6/MXD6 blend film in the outer layers.
When MXD6 blending ratio of PA6/MXD6 blending film layer is 30 %, the property of easy straight line cut is obtained. It is found that the plate-like cylinder structure was formed in the observation of TEM for PA6/MXD6 blend film. The multilayer biaxially oriented film composed of PA6/ MXD6 blend layer and MXD6 high content layer keeps high strength, easy tear property and high gas barrier. Namely, the material and production technology of a PA6 film could solve environmental and barrier problems.DOI : 10.3139/217.1868 En ligne : https://drive.google.com/file/d/1DwQO8vsF5lqCQjv3r2-mrxzIyNR6B9Ih/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3096
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Code-barres Cote Support Localisation Section Disponibilité 000687 - Périodique Bibliothèque principale Documentaires Disponible Multilayer barrier film of biaxially oriented PA6/EVOH by double bubble tubular film process / M. Takashige in INTERNATIONAL POLYMER PROCESSING, Vol. XXI, N° 1 (03/2006)
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Titre : Multilayer barrier film of biaxially oriented PA6/EVOH by double bubble tubular film process Type de document : texte imprimé Auteurs : M. Takashige, Auteur ; T. Kanai, Auteur Année de publication : 2006 Article en page(s) : p. 86-92 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : In the market, a film adapted to environmental and barrier problems is desired. The previous report discussed easy tear and gas barrier PA6 film. This report discusses the multilayer PA6 film having high barrier EVOH layer.
A biaxially oriented PA6 film produced by double bubble tubular film process has high strength, but does not have enough gas barrier property compared with K-coated PA6. In the following a multilayer film with gas barrier layer is studied. A high gas barrier layer of EVOH is added to the center layer in the outer layers of PA6 films. The gas barrier ability increases with increasing the content of EVOH and decreasing ethylene content of EVOH, but at the same time the mechanical properties and processability get worse. From this point of view, it is found that the optimum content of EVOH is between 20% and 43 %.
In a biaxially oriented multilayer film composed of PA6 layers and EVOH one keeps high strength and high gas barrier. The material and production technology of a PA6 film can solve environmental and barrier problems.DOI : 10.3139/217.0110 En ligne : https://drive.google.com/file/d/1l4ZPyZbO9ASMBuN-xqN5ksQ-8g6xkx3_/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2933
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Code-barres Cote Support Localisation Section Disponibilité 003861 - Périodique Bibliothèque principale Documentaires Disponible Quantitative analysis for polymer degradation in the extrusion process / H. Kometani in INTERNATIONAL POLYMER PROCESSING, Vol. XXI, N° 1 (03/2006)
PermalinkScale-up rule for double bubble tubular process of PA6 film / M. Takashige in INTERNATIONAL POLYMER PROCESSING, Vol. XVIII, N° 4 (12/2003)
PermalinkStretchability and properties of biaxially oriented polypropylene film / T. Kanai in INTERNATIONAL POLYMER PROCESSING, Vol. XXI, N° 5 (11/2006)
PermalinkStretchability and properties of LLDPE blends for biaxially oriented film / H. Uehara in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 2 (06/2004)
PermalinkStretchability and properties of various LLDPE for biaxially oriented film / H. Uehara in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 2 (06/2004)
PermalinkStudy on the bleeding mechanism of slip agents in a polypropylene film using molecular dynamics / M. Wakabayashi in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 2 (05/2009)
PermalinkThickness uniformity of double bubble tubular film process for producing biaxially oriented PA 6 film / M. Takashige in INTERNATIONAL POLYMER PROCESSING, Vol. XIX, N° 1 (03/2004)
PermalinkVisualization of flow instabilities for high density polyethylene / H. Kometani in INTERNATIONAL POLYMER PROCESSING, Vol. XXI, N° 1 (03/2006)
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