Jsp Corporation

Masaharu Oikawa

Shota Takagi

Mitsuru Shinohara

Kazuo Tsurugai

Takuya Chiba

Nobumasa Koshita

Hisao Tokoro

Hidehiro Sasaki

Tatsuya Hayashi

Tokunobu Nohara

Satoru Shioya

Masakazu Sakaguchi

Hideki Kuwabara

Koki Nishijima

Kouki Nishijima

Syouta Takagi

The present invention relates to an in-mold expanded beads molded article of expanded beads of an olefin thermoplastic elastomer, a cushion for shoe sole, and a method of producing expanded beads provided with through-holes and composed of a block copolymer of a polyethylene block and an ethylene/&#x3b1;-olefin copolymer block, and with respect to the in-mold expanded beads molded article of expanded beads of an olefin thermoplastic elastomer, a voidage of the expanded beads molded article is 5 to 40%; a density of the expanded beads molded article is 30 to 150 g/L; and a flexural modulus of the olefin thermoplastic elastomer that constitutes the expanded beads molded article is 10 to 100 MPa.

Foam particle moulded article, sole cushion, and method for producing foam particles

The present invention relates to an expanded beads molded article containing a block copolymer of a polyethylene block and an ethylene-&#x3b1;-olefin copolymer block and having a density of 30 kg/mor more and less than 150 kg/mand a modulus of repulsion elasticity of 60% or more. The sole member of the present invention includes the expanded beads molded article of the present invention.

Foam particle moulded article and sole member

An expanded beads molded article containing a block copolymer of a polyethylene block and an ethylene-&#x3b1;-olefin copolymer block and having a density of 150 kg/mor more and 500 kg/mor less and a tensile strength of 0.5 MPa or more.

Foam particle moulded article, and production method therefor

The present invention is concerned with expanded beads that are olefin-based thermoplastic elastomer expanded beads containing a coloring agent, wherein an apparent density of the expanded beads is 40 to 300 g/L, and an average surface layer membrane thickness (a) is 3 to 25 &#x3bc;m, and a molded article thereof, and is able to provide expanded beads capable of producing an expanded beads molded article which is excellent in in-mold moldability and excellent in tensile characteristics and an expanded beads molded article using the expanded beads.

Foam particles, and moulded article thereof

The present invention provides expanded beads comprising a crosslinked multi-block copolymer containing an ethylene block and an ethylene-&#x3b1;-olefin copolymer block, having an apparent density of 40 to 300 g/L, a gel fraction of 30 to 70% by weight by a hot xylene extraction method, an average cell diameter (a) of 50 to 180 &#x3bc;m, and an average surface layer thickness (b) of 3 to 27 &#x3bc;m, and the expanded beads are excellent in in-mold moldability, and can produce an expanded beads molded article being excellent in tensile characteristics in a well balanced manner.

Expanded beads and molded object thereof

The present invention provides expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T&#x2212;T) between a melting peak temperature (T) and a melting peak temperature (T) is from 0 to 8&#xb0; C., wherein the melting peak temperature (T) is a melting peak temperature at the time of first heating in a DSC curve obtained by heating the expanded beads from 20&#xb0; C. to 260&#xb0; C. at a heating rate of 10&#xb0; C./min, the melting peak temperature (T) is a melting peak temperature at the time of second heating in a DSC curve obtained by cooling from 260&#xb0; C. to 20&#xb0; C. at a cooling rate of 10&#xb0; C./min after the first heating and further heating again from 20&#xb0; C. to 260&#xb0; C. at a heating rate of 10&#xb0; C./min, and the DSC curves are obtained by the heat flux differential scanning calorimetry in conformity with JIS K7121-1987. The expanded beads of thermoplastic polyurethane not only have excellent surface appearance and fusion bonding properties but also have a low shrinkage factor.

Expanded thermoplastic polyurethane particles and expanded thermoplastic polyurethane particle molded article

The present invention is concerned with expanded beads of a block copolymer of a polyethylene block and an ethylene/&#x3b1;-olefin copolymer block, wherein a xylene insoluble fraction (A) of the expanded beads by a hot xylene extraction method is 10 to 70% by weight, and a ratio (A/B) of the xylene insoluble fraction (A) to a xylene insoluble fraction (B) of the expanded beads by a hot xylene extraction method when divided into two equal parts and measured is 1.0 to 1.1, and is able to provide expanded beads with excellent in-mold moldability and an expanded beads molded article with excellent fusion bondability and restorability.

Foam particles and foam particle molded body

The present invention relates to thermoplastic olefin elastomer expanded beads, having an average aspect ratio of 1.10 or less and an average circularity of 0.985 or more. The thermoplastic olefin elastomer expanded beads preferably have a crystal structure such that a melting peak inherent in the thermoplastic olefin elastomer (inherent peak) and one or more melting peaks on a higher temperature side than the inherent peak (high temperature peaks) appear on a DSC curve obtained when heating the expanded beads from 23&#xb0; C. to 200&#xb0; C. at a heating rate of 10&#xb0; C./min.

Olefinic thermoplastic elastomer foamed particles

The present invention relates to an expanded beads molded article, which is obtained through in-mold molding of expanded thermoplastic elastomer beads, has voids, and has a density of 150 to 300 kg/mand a voidage of 10 to 70% by volume.

Foaming particle molded body

The present invention is concerned with expanded beads of thermoplastic polyurethane in which a water-soluble anionic surfactant is attached at 50 mg/mto 1,000 mg/monto the surfaces of expanded beads of thermoplastic polyurethane having a dispersant attached thereto; and a method for producing an expanded beads molded article, including filling the expanded beads of thermoplastic polyurethane in a mold for molding and heating with a water vapor to mutually fuse the expanded beads with each other. The present invention provides expanded beads from which an expanded TPU beads molded article having excellent tensile strength and a method for producing an expanded TPU beads molded article.

Thermoplastic polyurethane foamed particles and method for manufacturing thermoplastic polyurethane foamed particle molded article

Provided are expanded beads capable of providing an expanded thermoplastic polyurethane beads molded article which is excellent in physical properties, such as compression characteristics, repulsion elasticity, etc., and an expanded thermoplastic polyurethane beads molded article. Expanded beads of thermoplastic polyurethane, wherein a Shore A hardness of the thermoplastic polyurethane is 85 or more; an average cell diameter of the expanded beads is 50 to 300 &#x3bc;m; and a closed cell ratio when bisecting the expanded thermoplastic polyurethane bead is 60% or more; and an expanded thermoplastic polyurethane beads molded article obtained through in-mold molding of the same are disclosed.

The present invention is concerned with an expanded beads molded article of expanded beads comprising a crosslinked multi-block copolymer containing a polyethylene block and an ethylene/&#x3b1;-olefin copolymer block, wherein a density is 40 to 150 g/L; a gel fraction by a hot xylene extraction method is 30 to 70% by weight; a tensile elongation is 120% or more; a bead weight of the expanded beads is 0.8 to 8 mg; and the number of expanded beads per unit area on a surface of the expanded beads molded article is 5 to 30 per cm, and is able to provide an expanded beads molded article which is light in weight and favorable in surface properties, fusion bondability, and durability.

Expanded particle molded article

Thermoplastic resin foamed particles of the present invention includingmore thanoneor morefunctional additive selected from inorganic powder and inorganic fibers each includes a core layer formed of a thermoplastic resin and a coating layer in a foamed state formed of a thermoplastic resin, the mass ratio of the coating layer to the core layer is 99:1 to 50:50, the content (X) of the functional additive in the core layer is 5 to 90% by mass, and the content of the functional additive in the coating layer is smaller than the content (X) of the functional additive in the core layer. By this way, thermoplastic resin foamed particles from which a homogeneous foamed particle molding having excellent dimension stability, fusibility and appearance can be obtained while containing functional additive are provided.

Thermoplastic resin foamed particles

The present invention provides expanded polylactic acid resin beads, in which each bead is composed of a core layer that is in an expanded state and contains a crystalline polylactic acid resin, and a coating layer that coats the core layer and contains a mixed resin of an amorphous polylactic acid resin and a crystalline polyolefin resin, wherein the content of the crystalline polyolefin resin in the coating layer is 3% by weight or more and less than 50% by weight. The expanded polylactic acid resin beads can stably produce a molded article of expanded polylactic acid resin beads excellent in fusibility of the expanded polylactic acid resin beads therein and also excellent in solvent resistance.

Expanded polylactic acid resin beads and molded article of expanded polylactic acid resin beads

An object of the present invention is to provide expanded beads capable of producing an expanded beads molded article that is excellent in in-mold moldability and is excellent with good balance in lightweight property, flexibility, repulsion, restorability, and tensile characteristics, and an expanded beads molded article using the expanded beads. The expanded beads molded article of the present invention is produced by subjecting the crosslinked expanded beads of the present invention, to in-mold molding. The expanded beads molded article of the present invention may have an apparent density of from 40 to 150 g/L.

Growing community of inventors

Yokkaichi, Japan

Masaharu Oikawa