摘要:
The object of the present invention is to provide a method of reclaiming crosslinked rubber, which can reclaim various kinds of crosslinked rubbers whose reclamation is difficult. The method of reclaiming crosslinked rubber 10 of the present invention includes a step of reclaiming crosslinked rubber by applying shear stress to the crosslinked rubber 10, wherein the maximum pressure in the reclaiming step is 1.5 MPa or more.
摘要:
The object of the present invention is to provide a method of reclaiming crosslinked rubber wherein a reduction of qualities due to generation of decomposed products hardly occurs, and a molding of reclaimed rubber. In a reclamation step of reclaiming crosslinked rubber 10 by applying shear stress thereto and/or in a subsequent step in the present invention, a degasification carrier is introduced and decomposed products in the crosslinked rubber 10 are removed together with the degasification carrier. Also the disclosed is a molding of reclaimed rubber prepared by re-crosslinking reclaimed rubber obtained by this method.
摘要:
The present invention provides a rubber composition containing a reclaimed rubber and a method for producing the same. A rubber molded article having excellent rubber properties can be obtained and the recycling of a used rubber product can be promoted by the present invention. A rubber composition of the present invention is a blend comprising a claimed rubber obtained by applying a heat and a shear stress to a vulcanized rubber, a non-vulcanized virgin rubber or/and a thermoplastic resin, wherein the reclaimed rubber contains 40% by weight or more of a residual toluene-insoluble gel component and the network chain density of the rubber in the gel component is 1/20 to 1/4 based on the network chain density of the rubber of the vulcanized rubber.
摘要:
The present invention provides a rubber composition containing a reclaimed rubber and a method for producing the same. A rubber molded article having excellent rubber properties can be obtaining and the recycling of a used rubber product can be promoted by the present invention. A rubber composition of the present invention is a blend comprising a reclaimed rubber obtained by applying a heat and a shear stress to a vulcanized rubber, a non-vulcanized virgin rubber or/and a thermoplastic resin, wherein the reclaimed rubber contains 40% by weight or more of a residual toluene-insoluble gel component and the network chain density of the rubber in the component is 1/20 to 1/4 based on the network chain density of the rubber of the vulcanized rubber.
摘要:
Polymeric composites may be produced by a process comprising melt-kneading an organophilic clay and a polymer at an average reduced pressure of at 5×104 Pa, a maximum reduced pressure of at least 1×105 Pa, and a total shear strain between 105 and 107, and/or a total shear energy per unit volume falling between 1010 and 1014 Pa. Polymeric composites produced under these conditions may have 50% or more of the entire layers of the layered organophilic clay dispersed as monolayers.
摘要:
The polylactic acid composite material of the present invention comprises a polylactic acid, a low molecular weight compound which has an amide group, and a layered clay mineral that is organically modified by means of an organic onium salt. As a result, a polylactic acid composite material that has a sufficiently rapid crystallization rate, and that is superior in terms of heat resistance, moldability and mold release characteristics can be obtained.
摘要:
This invention provides a polylactic acid resin composition in which stereocomplex crystals of poly-L-lactic acid and poly-D-lactic acid can be selectively crystallized to obtain polylactic acid having a sufficiently high speed of crystallization and a sufficiently high ratio of stereocomplex crystal and a molded article thereof obtained via melt molding and crystallization of the same. Such polylactic acid resin composition comprises polylactic acid capable of generating stereocomplex crystallization and an aromatic urea compound represented by formula (1): wherein R1 represents an alkylene group having 1 to 10 carbon atoms; R2 represents an alkyl group having 1 to 25 carbon atoms; and m is an integer between 1 to 6.
摘要:
A polylactic acid composition containing polylactic acid and ester-based plasticizer, wherein a content of the ester-based plasticizer is 16 to 33 wt %, and when the composition is highly deformed by stress loading as the relation between the stress and the deformation deviates from linear viscoelastic behavior and thereafter the stress is released, residual deformation measured after the stress is released is not less than 66.0% after 0.2 minute of the stress release, and is not more than 34.0% after 240 hours of the stress release.
摘要:
A polylactic acid composition containing polylactic acid and ester-based plasticizer, wherein a content of the ester-based plasticizer is 16 to 33 wt %, and when the composition is highly deformed by stress loading as the relation between the stress and the deformation deviates from linear viscoelastic behavior and thereafter the stress is released, residual deformation measured after the stress is released is not less than 66.0% after 0.2 minute of the stress release, and is not more than 34.0% after 240 hours of the stress release.
摘要:
A resin seal apparatus includes a movable bottom die vertically moved by an elevator mechanism, a transport mechanism horizontally moving the movable bottom die having placed thereon a printed circuit board with a semiconductor chip mounted thereon, an intermediate die abutting against a periphery of the printed circuit board when the movable bottom die is moved upward, a film of resin stretched by a film stretch mechanism over the intermediate die and the printed circuit board, a die for a chip, pressing a back surface of the semiconductor chip via the film of resin, and a top die pressing a top surface of the intermediate die via the film of resin. This apparatus allows a PCB with a semiconductor chip mounted thereon in the form of a flip chip to be sealed with resin in a reduced period of time to fabricate an electronic component.