Mitsui Chemicals, Inc.

The School Corporation Kansai University

Tomoya Matayoshi

Michio Eriguchi

Takayuki Watanabe

Naoto Yasaka

Kenichi Fujii

Kazuo Kohmura

Masayoshi Yamaguchi

Yoshiro Tajitsu

Jun Kamada

Takashi Unezaki

Tetsuya Nakamura

Kaichiro Haruta

Satoshi Noma

Yuzo Nakamura

A foam body constituted of a 4-methyl-1-pentene-based polymer, in which one or more temperatures showing a maximum value of loss tangent (tan δ) of dynamic viscoelasticity, which is obtained by dynamic viscoelasticity measurement conducted under the conditions of a temperature increase rate of 4° C./min, a frequency of 1.59 Hz, and a distortion of 0.1%, exist in at least a range of 10° C. or higher and 100° C. or lower, and the maximum value of the loss tangent is 0.5 or more and 3.5 or less. Another aspect relates to a polyolefin-based foam sheet constituted of a 4-methyl-1-pentene-based polymer, in which the difference in Shore A hardness of at least one surface at different times is defined. A further aspect relates to a complex including a foam body constituted of a 4-methyl-1-pentene-based polymer and a member which is bonded to the foam body and is different from the foam body.

Foam body, polyolefin-based foam sheet, and complex

An electretized film of the present invention includes a cyclic olefin polymer, in which the electretized film is a non-porous film, and a piezoelectric constant din a thickness direction, which is measured by applying a pressing force to the electretized film in the thickness direction, under conditions of a load of 0.5 N, a dynamic load of &#xb1;0.25 N, a frequency of 110 Hz, a temperature of 23&#xb0; C., and a humidity of 50%, is equal to or more than 100 pC/N.

Electretized film and electronic device

Provided is an adhesive member including: a base material having an uneven shape on at least one surface; and a surface layer covering at least a portion of the surface having the uneven shape on the base material.

Adhesive member and production method for adhesive member

The injection molding soft resin composition of the invention comprises (A) an ethylene/&agr;-olefin copolymer using an &agr;-olefin of 3 to 10 carbon atoms as a comonomer and (B) a thermoplastic elastomer composition obtained by dynamically heat treating a crystalline polyolefin resin and an olefin copolymer rubber in the presence of a crosslinking agent, in a specific ratio. The component (A) has a Shore A hardness of 40 to 95, MRF of 1.0 to 100 g/10 min and a density of 855 to 900 kg/cm , and the component (B) has a gel content of 30 to 100% and a Shore A hardness of 40 to 95. The injection molded article of the invention comprises the soft resin composition and may have been subjected to painting on its surface. Each of the toy and the daily use miscellaneous article of the invention comprises the injection molded article. According to the invention, there can be provided an injection molding soft resin composition, from which injection molded articles having softness and being excellent in low gloss, mechanical properties such as tensile strength and appearance can be produced with high productivity, and a molded article of the composition, such as a molded article employable as a soft toy or a daily use miscellaneous article. Further, a painted article of an injection molded article, which has excellent adhesion of coating, can be provided.

Injection molding soft resin composition and users thereof

The soft resin composition for injection molding comprises (A) an ethylene/&agr;-olefin copolymer comprising ethylene and an &agr;-olefin of 3 to 10 carbon atoms and (B) a polyethylene in a specific ratio. The component (A) has a Shore A hardness of 40 to 95, a melt flow rate (MFR ) of 1.0 to 20 g/10 min, and a density of 855 to 900 kg/m ; and the component (B) has a melt flow rate (MFR ) 0.1 to 100 g/10 min, a density of 910 to 925 kg/m , and a melt tension measured at 190&deg; C. and the MFR satisfying the relation: melt tension>2.2&times;(MFR ) . The injection-molded product of the present invention comprises the above soft resin composition, and may have been subjected to coating on its surface. The toy and the article for daily use of the invention comprise the injection-molded product. The soft resin composition for injection molding is capable of producing, with good productivity, an injection-molded product having an excellent translucent appearance while maintaining the flexibility; and the injection molded article of the composition is employable as a soft toy or an article for daily use. The coated product of such an injection-molded product has excellent adhesion of the coating.

Soft resin composition for injection molding and uses thereof

Growing community of inventors

Nagoya, Japan

Tomoya Matayoshi