Abstract: A porous film which has a crosslinked structure and, due to this structure, has excellent resistance to film breakage at high temperatures and excellent transverse-direction shape retention even at high temperatures, uses of the film are provided. The porous film comprises a crosslinked material of a resin composition containing a polyolefin. The film has a peak of shrinkage force in a transverse direction (TD) at a temperature region of the shutdown temperature or higher of the film, and the shrinkage force as measured at the peak being 80 N/cm2 or lower.

Abstract: A porous film which has a crosslinked structure and, due to this structure, has excellent resistance to film breakage at high temperatures and excellent transverse-direction shape retention even at high temperatures, uses of the film are provided. The porous film comprises a crosslinked material of a resin composition containing a polyolefin. The film has a peak of shrinkage force in a transverse direction (TD) at a temperature region of the shutdown temperature or higher of the film, and the shrinkage force as measured at the peak being 80 N/cm2 or lower.

Abstract: A separator capable of inhibiting the self-discharge of a battery. The separator is a battery separator obtained by applying a polymer having in the molecule a carbodiimide unit represented by the following formula (I): —[—R—N?C?N—]n—??(I) (wherein R means an organic group and n means an integer of 1 to 10,000) to a porous sheet substrate.

Abstract: A battery highly inhibited from suffering self-discharge. The battery is characterized by containing a built-in polymer which has in the molecule a carbodiimide unit represented the following formula (I): —[—R—N═C═N—)]n—  (I) wherein R means an organic group and n means an integer of 1 to 10,000).

Abstract: There are provided a porous film comprising a polymer composition comprising (a) a polymer having C═C double bond and an aliphatic ring having 5 to 10 carbon atoms in a main chain thereof; and (b) another resin; a porous film, wherein all or a part of C═C double bond in the (a) polymer is disappeared; and a porous film, wherein the (a) polymer and the (b) resin are cross-linked therebetween. The porous film has appropriate porosity, air permeability and puncture strength, and is especially excellent in latent heat resistance or heat resistance. Further, there are provided a process for producing the porous film; a separator for a battery comprising the porous film; and a battery comprising the separator.

Abstract: A gel composition comprising a reversible gelling agent, an irreversible gelling agent, an electrolyte salt and a solvent for the electrolyte salt; a preparation process for the gel composition which comprises a first step of heating a gel mixture of a reversible gelling agent, an irreversible gelling agent, an electrolyte salt and a solvent for the electrolyte salt to a first temperature region at which the reversible gelling agent functions, to transform the gel into sol and molding the sol into a desired shape; and a second step of heating the sol to a second temperature region at which the irreversible gelling agent functions, to gel irreversibly; and a gel electrolyte composition comprising the above-described gel composition and a process for the preparation thereof. The gel composition can be handled as a solid electrolyte, can be adhered closely with the surface of an electrode and can be used as an electrochemical element in a desired shape.

Abstract: To provide a microporous film having excellent permeability and mechanical strength as well as excellent SD function at low temperatures and film-breaking resistance at high temperatures. A microporous film made of a resin composition at least comprising 1 to 50% by weight of a ring-opening polymer of an unsaturated condensed alicyclic compound, and 1 to 50% by weight of one or more resin components selected from the group consisting of polyolefins having a weight-average molecular weight of 500000 or less, thermoplastic elastomers and graft copolymers.

Abstract: A separator capable of inhibiting the self-discharge of a battery.

Abstract: A porous film having high strength, homogeneous porous structure, and excellent affinity for electrolytic solutions and suitable for use as a separator for batteries and capacitors; a process for producing the film; and a battery and capacitor each employing the porous film as a separator. The porous film comprises a resin composition including from 70 to 99.9% by weight of an high molecular weight polyolefin resin and from 0.1 to 30% by weight of a polymer having a polyacrylate, polymethacrylate, poly (ethylene oxide), poly (propylene oxide), poly(ethylene propylene oxide), polyphosphazene, poly(vinyl ether) or polysiloxane structure as or in a main chain and having a chain oligo (alkylene oxide) structure in side chains.

Abstract: A peel-off developable pattern sheet comprising a transparent flexible substrate having thereon a pattern comprising a photopolymerizable color image-forming material layer and a process for producing a monochromatic or multi-color patterned display element by making use of the pattern sheet(s) are disclosed. A patterned display element can be produced in a continuous manner in an organic solvent-free working environment. The formed pattern has excellent sharpness and well-controlled surface properties.

Abstract: An exposure development device for long base member is disclosed, comprising:a long base member exposing section which repeats the operations of exposing an image forming long base member in the long size state, the image forming long base member being prepared by laminating an image forming material comprising a transparent support having adhered thereon a photopolymerizable composition layer on a long substrate on the surface of which an image is formed, and intermittently feeding the exposed image forming long base member;a synchronous connection section which detects a length of the image forming long base member intermittently fed from the exposing section and continuously feeds the image forming long base member; anda continuous peel development section which continuously peels the transparent support and non-exposed portions of the photopolymerizable composition layer of the image forming long base member continuously fed from the synchronous section, from the long substrate to retain the exposed photo

Abstract: A peeling type developing method and apparatus for removing exposed photoresist from printed circuit boards. The printed circuit board is covered with a photopolymerization compound layer and then a transparent support layer. After exposure, a thin adhesive tape is stuck to the support layer extending obliquely across the board and crossing opposite corners thereof. The adhesive tape, together with the support layer and the unexposed portions of the photoresist material, are peeled off the printed circuit board by a pair of pinch rolls with the aid of a peeling bar in line contact with the substrate through the adhesive tape and the support layer.

Abstract: A method of peel development comprising laminating an image-forming material comprising a transparent support and a photopolymerizable composition layer on the surface of a substrate on which an image is formed, imagewise exposing the image-forming material, and peeling the support from the substrate together with the unexposed areas of the photopolymerizable composition layer while leaving the exposed areas thereof on the substrate, wherein the cohesive strength of the photopolymerizable composition layer is set such that the force required to separate the unexposed areas from the exposed areas is at least 1.0 kg/mm.sup.2 and the peeling operation is performed while maintaining a peel angle (.alpha.) of the support to the substrate within the range of 0.degree.<.alpha..ltoreq.90.degree.. This method enables the formation of sharp images on the substrate while allowing for the easy separation of the unexposed areas from the exposed areas.