摘要:
A preform (1) for the production of biaxially extended plastic bottles has a rigid, substantially elongated body (2), which at one longitudinal end thereof comprises a base (3) and the opposite longitudinal end of which is configured as a neck section (4) provided with a pouring opening (5). The preform (1) has outer and inner walls (A, I), which extend at least across a partial region of the axial length thereof and are formed by separate plastic layers. At least one intermediate layer (Z) is embedded in at least a partial region of the body (2) in a space delimited by the outer and inner walls (A, I) of the body (2), the intermediate layer extending across part of the axial length and the circumference of the body (2) and having a color that deviates from the outer or inner layers (A, I).
摘要:
In a plastic container manufactured by melting blow molding a heated and molten parison extruded from an extruder, a mouth 3 and/or a specified part of a body 2 has a thicker thickness than the body proper. One or more thick parts of the body 2 are continuously or discontinuously formed over part or all a peripheral, height or helical direction of the body of the container. The container enjoys enhanced rigidity, appearance and functionality even when the thickness of its body is considerably reduced.
摘要:
For a preform, on an outer circumferential side of a base material layer, which is made of a first colored resin, a colored layer, which is made of a second colored resin having a color different from that of the first colored resin and which forms a gradation region in which the layer thickness gradually decreases upward, is formed. Furthermore, on the outer circumferential side of the colored layer, a coating layer, which is made of the first colored resin, is formed.
摘要:
A manufacturing method of a resin container includes continuously supplying a base material resin forming a container body from a main extruder, discharging from a discharge portion provided in a die head a sub-material supplied from a sub-extruder so that the sub-material joins the base material resin, extruding a parison from a slit portion opened on an end side of the die head, and blow-molding the parison, thereby forming a coating layer which covers the whole or a part of the container body by using the sub-material. A thickness reducing portion in which a thickness is continuously reduced is formed in the coating layer while adjusting a resin pressure in a supply path of the sub-material fed from the sub-extruder by performing suck-back control which pulls back the sub-material from the discharge portion at an arbitrary timing when joining the sub-material with the base material resin.
摘要:
In a plastic container manufactured by melting blow molding a heated and molten parison extruded from an extruder, a mouth 3 and/or a specified part of a body 2 has a thicker thickness than the body proper. One or more thick parts of the body 2 are continuously or discontinuously formed over part or all a peripheral, height or helical direction of the body of the container. The container enjoys enhanced rigidity, appearance and functionality even when the thickness of its body is considerably reduced.
摘要:
A manufacturing apparatus of a resin container includes a main extruder which supplies a base material resin, and a sub-extruder which supplies a sub-material. The sub-material supplied from the sub-extruder is discharged from a discharge portion provided in a die head so that the sub-material joins the base material resin continuously supplied from the main extruder. A parison is then extruded from a slit portion opened on an end side of the die head, and subjected to blow molding, thereby forming a coating layer which covers the whole or a part of a container body formed of the base material resin by using the sub-material. A suck-back mechanism which pulls back the sub-material from the discharge portion is provided between the sub-extruder and the die head, and the discharge portion is provided in the vicinity of the slit portion in-the die head.
摘要:
A laminated and molded body obtained by coextruding and molding at least two kinds of resin materials is preferable as a blow-molding aimed preform, a direct-blow molded bottle, a tube, or a blow molded tube, and has at least one layer constituted of a colored layer having a thickness continuously or intermittently varied in a direction parallel to the extruding direction of the at least one layer and/or in another direction intersecting the extruding direction, thereby enhancing the gradation effect.
摘要:
An apparatus for producing a parison having a plurality of resin layers and at least one resin layer of varying thickness is disclosed. The parison is used to form containers in a blow mold machine. An extruder is in communication with a flow head to form the parison. The apparatus includes a valve block having a duct providing communication between a second extruder and the flow head. Flow of resin from the second extruder directly to the flow head is controlled by a valve in the valve block. An accumulator cylinder and piston are also in communication with the duct and control the resin pressure within the duct. Opening and closing the valve and stroking the piston sends resin from the second extruder to the flow head and forms a resin layer having a varying thickness on the parison. A method of forming a varying layer is also disclosed.
摘要:
In a first embodiment of the present invention, a coating layer 3 which covers a container body 2 is formed; this coating layer 3 disappears while continuously and gradually reducing its thickness in a reduction rate of 0.1 to 1.5 μm/mm from a coating layer forming part 4 toward a coating layer non-forming part 5; and the coating layer 3 has a thickness reducing portion 6 in which a thickness reduction rate is 0.1 to 0.5 μm/mm at least in a range of 30 mm in a height direction immediately before a part where the coating layer 3 disappears.
摘要:
A method includes injection molding a preform using a two phase injection system having a first phase in which a material is injected into the preform and a second phase in which the material is injected into the preform. The preform is disposed in a mold. The preform is blow molded into an intermediate article. The intermediate article is trimmed to form a finished container. The first phase includes injecting a material into the preform to form a single layer of the preform and the second phase includes injecting the material to form inner and outer layers and an intermediate layer between the inner and outer layers. The inner and outer layers include the material and the intermediate layer includes at least one additive. Finished containers are disclosed.