Toyo Boseki Kabushiki Kaisha

Fuji Seal International, Inc.

Kabushiki Kaisha Boron International

Toyobo Co., Ltd.

Katsuhiko Nose

Norimi Tabota

Masayuki Haruta

Shigeru Komeda

Yoshinori Takegawa

Katsuya Ito

Naonobu Oda

Satoshi Hayakawa

Masatoshi Hashimoto

Katsuaki Kuze

Yukinobu Mukoyama

Hiroshi Shibano

Tadashi Nishi

Yoshinori Miyaguchi

Kimihiro Mabuchi

Noriyuki Tamamura

Noriaki Kato

Noriko Monden

Hidehiko Sakurai

Masakazu Iwasaki

Naoki Mizuno

Chikao Morishige

Kenji Kawai

Toshitake Suzuki

Hajime Suzuki

Takuro Endo

Osamu Makimura

Hideyuki Yokota

Tsutomu Oko

Kyoko Inagaki

Yasuhiro Nishino

Kuniharu Mori

Akito Hamano

Hideki Sugihara

Yasuo Yoshinaka

Shinya Koyama

Shigetomo Yamamoto

Takurou Endo

Makoto Ono

Shigenori Iwade

Teruo Kurosawa

Shota Hayakawa

Hideaki Tatsuta

There is provided a thermally shrinkable polyester film where the opening ability along the perforation is very good. A thermally shrinkable polyester film comprising polyester resin in which ethylene terephthalate is a main constituting component and not less than 13 molar % of one or more monomer component(s) which can become non-crystalline component is/are contained in the total polyester resin components, wherein the film has specific thermally shrinking characteristics and specific mechanical characteristics after thermal shrinking treatment.

Thermally shrinkable polyester film, method of manufacturing the same, and packed product using the same

A heat-shrinkable white polyester film is provided which has extremely satisfactory cuttability along a perforation and has light-shielding properties. Also provided are: a label; and a process for producing the film with high productivity. The heat-shrinkable white polyester film comprises a polyester resin constituted of ethylene terephthalate as a main constituent component and containing at least 13 mol % one or more monomer ingredients capable of serving as an amorphous component among all components of the polyester resin. This film has specific heat shrinkability, specific light-shielding properties, and specific mechanical properties. The process is excellent in the productivity of the film. The label is obtained from the heat-shrinkable white polyester film.

Heat-shrinkable white polyester film, process for producing heat-shrinkable white polyester film, label, and package

The inventive heat-shrinkable polyolefin film is high in shrinkability in the longitudinal direction that is its main shrinkage direction and excellent in finish properties after shrinkage, perforated line openability, and thermal blocking resistance. The heat-shrinkable polyolefin film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and heat-resistant peel strength.

Heat shrinkable polyolefin film and process for producing the same

The invention aims at providing a heat-shrinkable polyester film which is excellent in tearability along perforations and in break resistance after storage when used as labels of beverage bottles. The invention relates to a heat-shrinkable polyester film which is made of a polyester resin comprising ethylene terephthalate as the main constituent and containing at least 13 mol % of at least one monomer capable of forming an amorphous component in the whole polyester resin component and which has specific heat shrinkage characteristics and exhibits specific mechanical characteristics after heat shrinking treatment. The film can be produced by a sequential biaxial orientation process comprising longitudinal orientation step, intermediate heat treatment step, positive cooling step, transverse orientation step, and final heat treatment step.

Process for production of heat-shrinkable polyester film, heat-shrinkable polyester film and packages

The present invention provides a heat-shrinkable polyester film with very good perforation-tear property and also very high productivity. A heat-shrinkable polyester film made of a polyester resin including ethylene terephthalate as a main constituent and containing 15% by mole or more of at least one monomer capable of forming an amorphous component in the whole components of the polyester resin, which exhibits specific heat shrinkage properties and specific mechanical properties after the heat shrinkage.

Heat-shrinkable polyester film, process for production thereof, and package

The polyamide based resin laminated film roll of the present invention has physical properties such as boiling water shrinkage percentage, surface roughness, refractive index in the thickness direction, etc., adjusted to achieve a predetermined range of degree of variability, when the polyamide based resin laminated film has a first sample cutout portion set up within 2 m from the winding end of film and final cutout portion within 2 m from the winding start of film, and at the same time, has a sample cutout portion set up at approximately every 100 m from the first sample cutout portion.

Polyamide based laminated resin film roll and production process thereof

The present invention provides a polyamide based mixed resin laminated film roll formed by winding up a polyamide based mixed resin laminated film comprising a plurality of polyamide mixed resin sheets stacked on top of each other. A first sample cutout portion is provided within 2 m from the winding end of film, and a final sample cutout portion is provided within 2 m from the winding start of film. The roll is regulated so that, when sample cutout portions are provided at intervals of about 100 m from the first sample cutout portion, for all samples cutout from the cutout portions, the elastomer content, tensile modulus of elasticity, thickness unevenness in the longitudinal direction and other properties fall within a predetermined variation range.

Polyamide based mixed resin laminated film roll and a process for producing the same

A heat-shrinkable polyester film is provided which exhibits a high shrinkability in a high-temperature range with a main shrinking direction oriented in a longitudinal direction thereof, though not shrinking in the longitudinal direction in a low-temperature range, possesses an extremely high mechanical strength in a transverse direction orthogonal to the main shrinking direction, and, in particular, can be utilized suitably as a film for forming a jacket label of a battery or in similar applications.

Heat-shrinkable polyester film and process for producing the same

The inventive heat-shrinkable polystyrene film is high in shrinkability in the longitudinal direction that is its main shrinkage direction, is excellent in perforated line openability, and has high toughness. The heat-shrinkable polystyrene film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and breaking energies in the longitudinal and width directions.

Heat shrinkable polystyrene film and process for producing the same

A heat-shrinkable polyester film is obtained which is extremely satisfactory in openability along a perforation, has exceedingly high productivity, and is less apt to split in the lengthwise direction in processing, e.g., printing. Provided is a label which is formed from the heat-shrinkable film and is satisfactorily tearable. The label is one formed from a tubular material which comprises as a base a heat-shrinkable film thermally shrinking mainly in the film width direction and which has been cut according to an object to be packaged, both edges in the film width direction having been bonded to each other. The tubular material has been thermally shrunk to constitute the label, with which at least part of the periphery of the object to be packaged is covered. The label has an angle tear strength in the direction perpendicular to the main shrinkage direction (i.e., in the film length direction) of 100-310 N/mm and a tensile break strength in the direction perpendicular to the main shrinkage direction (i.e., in the film length direction) of 50-300 MPa.

Label

A polyamide based resin film roll is provided. The polyamide based resin film roll comprising: a first sample cutout portion within 2 m from the winding end of film; and a final cutout portion within 2 m from the winding start of film, wherein when a sample cutout portion is set up in approximately every 100 m from the first sample cutout portion, in all samples cut out from each of the cutout portions, mechanical properties such as boiling water shrinkage percentage and refraction index in the thickness direction are adjusted within a given range of variation width.

Polyamide based resin film roll and a process for producing the same

The problem to be solved by the present invention is to provide a biaxially oriented polyamide based mixed resin film roll with which bag forming processing by lamination is able to be performed smoothly and with high yield ratio and at the same time with which packages free of S-shaped curls can be obtained efficiently. A solution for the problem concerns the polyamide based mixed resin film roll of the present invention which includes a first sample cutout portion within 2 m from the winding end of film and a final cutout portion within 2 m from the winding start of film, and when a sample cutout portion is set up in approximately every 100 m from the first sample cutout portion, in all samples cut out from each of the cutout portions, physical properties such as elastomer content, elastic modulus in tension, boiling water shrinkage percentage and refraction index in the thickness direction are adjusted to be within a predetermined range of variation range.

Polyamide based mixed resin film roll and process for producing the same

A film roll of a heat-shrinkable polyester film characterized in that the heat-shrinkable polyester film meets the following requirements (1) and (2). (1) When samples are cut off therefrom at an almost equal interval along the longitudinal direction, and immersed in hot water at 85&#xb0; C. for 10 seconds, subsequently in water at 25&#xb0; C. and withdrawn, heat-shrinkage percentages in the maximum shrinkage direction of all the samples are 20% or more. (2) When raw polymers used for production of the film above comprises of a major constitutional unit and one or more sub constitutional units different therefrom; and the content of the primary sub constitutional unit is determined, the content of the primary sub constitutional unit in each sample is more than 7 mole % in 100% of all constitutional units, and when an average of the contents of the primary sub constitutional unit is calculated, the contents thereof of all the samples fall within a range of &#xb1;2 mole % relative to the average.

Heat-shrinkable polyester film roll and a process for producing the same

The present invention relates to a permselective separation membrane that can be used in blood purifying treatment. More particularly, the present invention relates to a polysulfone-based permselective separation membrane which has well-balanced separation properties, highly stable safety and performance, and also can be smoothly assembled into a module, and a method for producing the same.

Separation membrane with selective permeability and process for producing the same

In the heat-shrinkable polyester film of the present invention, the main shrinkage direction is the longitudinal direction. In addition, the hot-water heat shrinkage ratios in the longitudinal direction and the width direction when the film is treated in hot water at 90&#xb0; C. for 10 seconds, the refractive indexes in the longitudinal direction and the width direction and the natural shrinkage ratio after aging at 40&#xb0; C. and 65% RH for 700 hours or more are each controlled in predetermined ranges. The heat-shrinkable polyester film of the present invention is manufactured by stretching an unstretched film at a ratio of 2.5 times or more and 6.0 times or less in the width direction at a temperature of Tg+5&#xb0; C. or more and Tg+40&#xb0; C. or less, passing the film in an intermediate zone that does not execute an active heating operation, heat-treating the film at a temperature of 100&#xb0; C. or more and 170&#xb0; C. or less over a period of 1.0 second or more and 10.0 seconds or less, cooling the film to a surface temperature of 30&#xb0; C. or more and 70&#xb0; C. or less, stretching the film at a ratio of 2.0 times or more and 7 times or less in the longitudinal direction at a temperature of Tg+5&#xb0; C. or more and Tg+80&#xb0; C. or less, and subsequently cooling the film at a cooling rate of 30&#xb0; C./second or more and 70&#xb0; C./second or less to a surface temperature of the film of 45&#xb0; C. or more and 75&#xb0; C. or less.

Heat-shrinkable polyester film and process for production thereof

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Osaka, Japan

Katsuhiko Nose