摘要:
A multi-layered perform for substantially preventing the generation of strains and obtaining improved stress cracking resistance with excellent appearance characteristics includes a mouth portion, a body portion and a bottom portion and has at least the body portion and the bottom portion formed of an inner layer, an intermediate layer, and an outer layer by a compression molding. A multi-layered bottle is manufactured by performing a biaxial stretch blow molding of such multi-layered perform. The multi-layered bottle includes a mouth portion a shoulder portion, a body portion and a bottom portion. At least the shoulder portion, the body portion and the bottom portion include an inner layer, an intermediate layer and an outer layer.
摘要:
It is an object of the invention to obtain a multilayered molten resin mass capable of providing a multilayered compression-molded product in which the layers of the multilayered compression-molded product are distributed uniformly in the circumferential direction with the intermediate resin layer positioned entirely within the inner and outer resin layers. In multilayered molten resin mass (1) for forming the multilayered compression-molded product, interlayer resin (3) is embedded eccentrically towards the bottom within inner/outer resin (2) making up the inner and outer layers, and the shape of the interlayer resin (3) is controlled within the multilayered molten resin mass so as to achieve a concave shape, with the distance t from the lower end of the interlayer resin (3) to the lower end of the multilayered molten resin mass (1) being 10% or less of the entire length of the multilayered molten resin mass, and with y (length of umbrella part of interlayer resin)≧L (length of central part of interlayer resin) and 1>do (maximum outer diameter of interlayer resin in direction of circumference)/D (outer diameter of multilayered molten resin mass in direction of circumference)≧0.5.
摘要:
A composite synthetic resin material forming apparatus comprises an outer channel having an outer outlet, an inner channel having an inner outlet opening into the outer channel, outer synthetic resin supply means for flowing an outer synthetic resin through the outer channel, and inner synthetic resin supply means for flowing an inner synthetic resin through the inner channel. Opening and closing means for selectively opening and closing the inner outlet is disposed. The outer synthetic resin supply means intermittently supplies the outer synthetic resin to the outer channel in accordance with opening and closing of the inner outlet by the opening and closing means.
摘要:
A composite synthetic resin material forming apparatus comprises an outer channel having an outer outlet, an inner channel having an inner outlet opening into the outer channel, outer synthetic resin supply means for flowing an outer synthetic resin through the outer channel, and inner synthetic resin supply means for flowing an inner synthetic resin through the inner channel. Opening and closing means for selectively opening and closing the inner outlet is disposed. The outer synthetic resin supply means intermittently supplies the outer synthetic resin to the outer channel in accordance with opening and closing of the inner outlet by the opening and closing means.
摘要:
An extrusion feed device for a composite resin capable of forming a composite resin extruded material having a variety of layer configurations not necessarily symmetrical. A plurality of cylindrical flow passages (3) and (4) for feeding a molten resin, an opening/closing valve (7) capable of opening/closing a center flow passage (36) and a cylindrical flow passage (4a), and a center opening/closing valve (39) capable of opening/closing the center flow passage are provided at the upstream side end part (2a) of a discharge passage (2) for delivering the composite resin extruded material. A main resin (30a) forming an outside layer is always fed from the cylindrical flow passage (3), and the other molten resin (30b) and/or (30c) as an auxiliary resin is fed, at a proper timing, from the cylindrical flow passage (4) and the center flow passage (36) on the inside into the molten resin (30a) on the outside by controlling the opening/closing valve (7) or the center opening/closing valve (39). Thus, the composite resin mass in a variety of forms can be provided by involving, for example, multiple types of resins in the main resin layer in the state of being not involved in each other.
摘要:
An extrusion feed device for a composite resin capable of forming a composite resin extruded material having a variety of layer configurations not necessarily symmetrical. A plurality of cylindrical flow passages (3) and (4) for feeding a molten resin, an opening/closing valve (7) capable of opening/closing a center flow passage (36) and a cylindrical flow passage (4a), and a center opening/closing valve (39) capable of opening/closing the center flow passage are provided at the upstream side end part (2a) of a discharge passage (2) for delivering the composite resin extruded material. A main resin (30a) forming an outside layer is always fed from the cylindrical flow passage (3), and the other molten resin (30b) and/or (30c) as an auxiliary resin is fed, at a proper timing, from the cylindrical flow passage (4) and the center flow passage (36) on the inside into the molten resin (30a) on the outside by controlling the opening/closing valve (7) or the center opening/closing valve (39). Thus, the composite resin mass in a variety of forms can be provided by involving, for example, multiple types of resins in the main resin layer in the state of being not involved in each other.
摘要:
A multi-layer structure comprising a functional resin layer obtained by covering a core layer of a base body resin or a second functional resin with a shell layer of a first functional resin, and a base body resin layer containing the functional resin layer therein. The layers of the functional resins are formed at positions where they are allowed to exhibit their functions to a sufficient degree, a plurality of functions can be imparted, and a molten resin mass having the above multi-layer structure can be formed by the compression-forming.
摘要:
A multi-layer structure comprising a functional resin layer obtained by covering a core layer of a base body resin or a second functional resin with a shell layer of a first functional resin, and a base body resin layer containing the functional resin layer therein. The layers of the functional resins are formed at positions where they are allowed to exhibit their functions to a sufficient degree, a plurality of functions can be imparted, and a molten resin mass having the above multi-layer structure can be formed by the compression-forming.
摘要:
The present invention relates to manufacture of container product with a constant level of quality, wherein the performance is constant, by resolving problems including transformation of perform performance caused by the temperature variation of the preform; or by the variation in the stretching blow molding due to a thermal difference between the surface and the inner part of the preform, resulting from the thickness thereof, in order to industrialize a new molding method recognized to be an excellent molding method from the point of view of economic efficiency and production efficiency, wherein compression molding and stretch blow molding are performed continuously. By a method or device for manufacturing continuously synthetic resin containers, preforms are molded by compression with a compression molding machine, then stretch blow molding is performed with a stretch blow molding machine. After discharging molded preforms from the compression molding machine, an even-heating treatment of preforms, a partial heating or partial cooling treatment according to need and then stretch blow molding are performed.
摘要:
A safety screw cap indicates prior opening of a container to protect consumers from prior contamination. The screw cap has an annular band encircling its lower end which is separated from the screw cap by a perforated line. The band is affixed to a fixing clement and the fixing element attached to the container when the screw cap is screwed in place. An unattached leader portion of the band can be lifted easily to peel the band from the container. As the band is peeled from the container, it is simultaneously tom from the screw cap at the perforations. Once the band is removed, the screw cap can be unscrewed and the container unsealed. Before peeling the band away, the screw cap cannot be unscrewed without causing obvious damage to the screw cap or band. In addition, the torque required to shear-separate the band from the fixing element, the fixing element from the container or the screw cap from the band is greater than that which can be applied easily by a normal adult.