摘要:
A cup-type container obtained by compression-forming a thermoplastic resin and including at least a flange portion, a body portion and a bottom portion, wherein a ratio (L/D) of the height of the container to the diameter of the opening is not less than 1.0, and if the direction of height of a test piece cut out from the body portion of the container is denoted by x and the circumferential direction thereof by y, a half-value width P at a half peak of a Miller index at a diffraction angle 2θ=14.5° that represents the diffraction by the crystal plane (110), is in a range of 1.25 to 1.5 over the whole body portion in a peak intensity profile in the direction of height (x-direction) of a Debye's ring obtained by measuring the diffraction intensities by causing the X-rays to be incident on an x-y plane of the test piece at right angles thereto. The cup-type container is evenly oriented in the direction of height of the container and in the circumferential direction thereof, has an even strength in all directions and has excellent heat resistance. The invention, further, provides a method of forming the cup-type container.
摘要:
A method for printing a three-dimensional part with an additive manufacturing system includes providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials, wherein the consumable feedstock material has a process window in which crystalline kinetics are either accelerated or retarded. The consumable feedstock material is melted in the additive manufacturing system. At least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
摘要:
A polymer composition suitable for manufacturing of isotropic three-dimensional printed articles, the composition including: a matrix phase including a propylene-based polymer or copolymer; and a dispersed phase in the matrix phase, the dispersed phase including an ethylene-based copolymer having a C3-C12 comonomer, wherein the dispersed phase has a different composition than the matrix phase, wherein the matrix phase has a crystallization half-time of less than 60 minutes.
摘要:
A method for printing a three-dimensional part with an additive manufacturing system includes providing a consumable feedstock material comprising a semi-crystalline polymer containing one or more secondary materials, wherein the consumable feedstock material has a process window in which crystalline kinetics are either accelerated or retarded. The consumable feedstock material is melted in the additive manufacturing system. At least a portion of the three-dimensional part from the melted consumable feedstock material in a build environment maintained within the process window.
摘要:
For forming an extrusion-foamed plastic layer, the plastic layer is first thermally treated in order to be at least particularly plastically deformable. Negative pressure is exerted on the plastic layer, pulling it apart in the direction of the thickness as a plastic deformation. The plastic layer is optionally pressed together to a desired thickness or introduced into a mold. The negative pressure leads to a greater cell size homogeneity. The thickness of the plastic layer smoothed. Further, a corresponding aftertreatment device is proposed. This includes a thermal treatment device or thermal treatment zone. At least one pair of opposing negative pressure surfaces follows in conveying direction. These pull apart the plastic layer. Optionally, the plastic layer is additionally cooled. Further, and the plastic layer may be further processed in a subsequent fabricating unit.
摘要:
A composite laminate comprises a stack of unidirectional fiber reinforced composite plies arranged in a fiber orientation sequence providing the laminate with quasi-isotropic properties.
摘要:
A method and an extrusion device for producing a foamed body. A plastics melt is produced inside the casing of a first extruder. The plastics melt is conveyed to an outlet die of a second extruder. The conveyed plastics melt has a foaming agent and expands after being fed through the outlet die. Before the plastics melt is fed through the outlet die, variations in temperature between different radial positions over the cross-section of the plastics melt are reduced by an extruder screw device which has a number of screw spindles distributed around the periphery. The plastics melt which is thus thermally homogeneous is fed through the outlet die.
摘要:
Disclosed are a resin sheet that has a resin layer which is made up of a thermoplastic resin and which has a degree of orientation of not less than 0.0002 and not more than 0.0020, and a thermoformed article and laminate structure. The resin sheet is preferably employed in a thermoforming process. Particlarly favorable application of the resin sheet is a paintless film, which is usually thermoformed and then laminated to a molten resin.
摘要:
A process for the production of optically isotropic extrusion films is disclosed. Accordingly in a first process step a thermoplsatic resin is extruded to form a film having a thickness below 600 .mu.m. The second process step entailsa) calendering said film between a ground elastic roller and a high gloss steel roller to produce a film having a high gloss surface and a matt surface, orb) calendering said film between a lacquered elastic roller and a high gloss steel roller to produce a film having high gloss on both surfaces, orc) calendering said film between a ground elastic roller and a high gloss steel roller to produce a film having a high gloss surface and a matt surface, and then coating said matt surface with a melt of said thermoplastic polymer and calendering the resulting coated film between a high gloss steel roller and a ground elastic roller, with the high gloss side of the coated film facing the roller of elastic material.
摘要:
A method for producing an UHMWPE product with enhanced planar mechanical properties. An initial UHMWPE semicrystalline morphology is solid-state deformed under compression in a mold including a mold cavity with an unenclosed perimeter zone or a perimeter zone with a reservoir enabling flow-through for molded UHMWPE. A polymer preform is oriented and extended in more than one direction in the mold cavity and the perimeter zone to an extent which is limited by the material properties of the polymer under the employed processing conditions. The oriented and extended UHMWPE is cooled under compression to ambient temperature for maintaining the maximum orientation and extension attained during the solid-state deformation process. The polymer product in the mold cavity is separated from the product in the perimeter zone of the mold cavity. The UHMWPE product has a markedly transformed morphology, as compared with the initial UHMWPE morphology. The product comprises oriented and extended molecular chains in more than one direction and exhibits markedly enhanced mechanical properties in more than one direction, the magnitude depending on the extent of deformation.