Mechanical property and dimensional stability of substrates for magnetic tapes

Higashioji, Takuji; Tsunekawa, Tetsuya; Bhushan, Bharat

doi:10.1016/s0301-679x(02)00232-3

Cited by 24 publications

(26 citation statements)

References 12 publications

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“…With transparencies that rival that of glass [13,14], thin films of the polymers used here are ideal for utilisation in biomedical applications where optical microscopy is required. The diverse physical properties of each of the polymers also makes them attractive for other biomedical and chemical applications; PMMA has excellent structural properties [14]; PEN forms an efficient UV barrier and is resistant to strong thermal and chemical conditions [15,16]; PLA is biocompatible and biodegradable [17].…”

Section: Published In: Microelectronicmentioning

confidence: 99%

Production of structures for microfluidics using polymer imprint techniques

Mills¹,

Martínez²,

Bessueille³

et al. 2005

Microelectronic Engineering

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Section: Published In: Microelectronicmentioning

confidence: 99%

Production of structures for microfluidics using polymer imprint techniques

Mills¹,

Martínez²,

Bessueille³

et al. 2005

Microelectronic Engineering

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“…In comparison with poly(ethylene terephthalate) (PET), PEN has a higher mechanical strength, higher melting point (270 8C, compared with 255 8C for PET) and better hydrolytic resistance. PEN has a relatively high glass transition temperature (T g % 120 8C) [1][2][3][4][5] compared with $72 8C for PET. [1] Such properties of PEN favour its use in applications such as capacitor dielectrics, data storage tapes, packaging, e-paper and flexible OLEDs.…”

Section: Introductionmentioning

confidence: 99%

Structural Information on the Transition Moments in Poly(ethylene‐2,6‐naphthalene) by Polarization FT‐IR Spectroscopy

Scott

Hakmé

Stevenson

et al. 2005

Macromolecular Symposia

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Summary: Oriented poly(ethylene-2,6-naphthalate) (PEN) has been characterised by polarised FT-IR spectroscopy to determine the structural angles of the transition moments to the molecular chain axis. The bands at 1130 cm À1 , 1142 cm À1 and 1602 cm À1 , which have been previously assigned as having their transition dipole moments parallel to the chain axis, are confirmed as parallel bands. Bands at 767 cm À1 and 831 cm À1 are confirmed as perpendicular bands. However the band at 1708 cm À1 which has previously been assigned as a perpendicular band, is shown here to have its transition moment at 728 to the molecular axis.

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“…It should be noted that the transverse dimensional stability under high temperature, high humidity and applied stress in the longitudinal direction of the nano-alloyed film can be improved compared with regular PET film, as shown in Figure 15. 12,13 SOCIAL SIGNIFICANCE AND MARKET The developed technique for the production of biaxially stretched nano-alloyed films can provide higher glass transition temperatures, new films with improved heat resistance, excellent dimensional stability at high temperatures and cost effectiveness compared with conventional PET films. For example, the dimensional stability, which is superior to conventional PET substrates, is the most important property for use in magnetic tapes for data storage with high capacity and contributes to the reduction of cost per storage capacity, or bit cost.…”

Section: Drawing In Longitudinal Directionmentioning

confidence: 99%

Development and industrialization of a biaxially stretched nano-alloyed film

Tsunekawa

Higashioji

Hosokawa

et al. 2012

Polym J

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The novel concept and significance of a nano-alloyed polymer, which includes nano-dispersed domains, is proposed, and a biaxially stretched nano-alloyed film is developed. The developed film has a higher glass transition temperature and improved dimensional stability compared with regular poly(ethylene terephthalate) (PET) films. Nano-sized polyimide domains are dispersed with our original melting extrusion process, which produces highly concentrated polyimide master batches at much lower temperatures than the regular processing temperature of the polyimide. The biaxially stretched film has been industrialized for use as a substrate for data storage tapes and can additionally be applied to materials in the fields of electronic devices, automobile, environmental and energy devices. Polymer Journal (2012) 44, 1170-1178; doi:10.1038/pj.2012.96; published online 13 June 2012Keywords: biaxially stretched film; glass transition temperature; nano alloy; nanostructure control technology; polyester; polyimide INTRODUCTION Development of a biaxially stretched nano-alloyed film Biaxially stretched polyester films, which are represented by poly (ethylene terephthalate) (PET) films, are currently the most widely used polymeric substrate materials in the fields of display technologies, electronic devices, storage media, electronic insulators, automobile, molding, package, printing and architecture. This widespread use is a result of the films possessing high strength, durability, transparency, flexibility and good surface properties. Information and telecommunications equipment have recently required more compactness and portability as well as excellent film properties, such as higher heat resistance and dimensional stability, especially in the field of electronics, environment and energy. It has been difficult for conventional biaxially stretched PET films to meet the future demand, and outstanding films with cost effectiveness are required.We have created a biaxially stretched nano-alloyed PET film that has a higher glass transition temperature, which is an intrinsic property of polymers, compared with regular biaxially stretched PET films. 1 The technical points from our development are the following. First, the novel concept and significance of nano-alloyed polymers have been proposed. Secondly, nanostructure control technology has been developed for the nano-sized dispersion of polyimide, which is a different organic polymeric material than polyester. Finally, the processing conditions for the biaxially stretched nano-alloyed films have been established. In this paper, we describe the design of a nano-alloyed polymer and biaxially stretched films.

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Mechanical property and dimensional stability of substrates for magnetic tapes

Cited by 24 publications

References 12 publications

Production of structures for microfluidics using polymer imprint techniques

Production of structures for microfluidics using polymer imprint techniques

Structural Information on the Transition Moments in Poly(ethylene‐2,6‐naphthalene) by Polarization FT‐IR Spectroscopy

Development and industrialization of a biaxially stretched nano-alloyed film

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