摘要:
A multi-layer polyester container comprising inner and outer layers of a polyester resin and at least one intermediate layer of a functional resin or a functional resin composition, wherein a difference of tan ´ of the inner polyester layer at 80°C and 60°C is 0.035 or less in the measurement of the dynamic viscoelasticity (DMS) thereof at 0.5 Hz. Even when the functional resin or the functional resin composition having a large draw stress is used as an intermediate layer, therefore, excellent transparency is obtained while effectively exhibiting the function such as barrier property possessed by the functional resin or the functional resin composition.
摘要:
Provided is a preform (1). On an outer circumferential side of a base material layer (5), which is made of a first colored resin (R1), a colored layer (6a), which is made of a second colored resin (R2) having a color different from that of the first colored resin (R1) and which forms a gradation region (Gr) in which the layer thickness gradually decreases upward, is formed. Furthermore, on the outer circumferential side of the colored layer (6a), a coating layer (7), which is made of the first colored resin (R1), is formed.
摘要:
A biaxially stretched, blow molded container (1) obtained by molding a laminated preform (201, 21) in a shape of a test tube, the preform (201, 21) being molded by an injection molding process using a multi-nozzle section, and the container (1) being a bottle having a neck (102, 201, 202, 22, 2, 32), a body (24), and a bottom (108, 25, 5), and comprising an outer layer (111, 11, 31) that forms an outer shell (106, 6) and an inner layer (112, 12, 2, 32) that forms an inner bag (107, 7) to be laminated in a peelable manner with an inner surface of this outer layer (111, 11, 31), wherein the inner layer (112, 12, 2, 32) is formed to have so thin a wall that the inner bag (107, 7) can be deflated under a pressure drop inside the inner bag (107, 7) caused by a decrease in volume of a content fluid.
摘要:
Concerning a container biaxially stretched and blow molded from a laminated preform obtained by an injection molding process utilizing a multi-nozzle section, it is a technical problem of this invention to create a delaminable function that is comparable to that of the delaminable bottles made by a direct blow molding process. A main means of this invention to solve this technical problem is a biaxially stretched, blow molded container obtained by molding a laminated preform in a shape of a test tube, the preform being molded by an injection molding process using a multi-nozzle section, and the container being a bottle having a neck, a body, and a bottom, and comprising an outer layer that forms an outer shell and an inner layer that forms an inner bag to be laminated in a peelable manner with an inner surface of this outer layer, wherein the inner layer is formed to have so thin a wall that the inner bag can be deflated under a pressure drop inside the inner bag caused by a decrease in volume of a content fluid; the outer layer and the inner layer are of a laminar structure in which the lamination extends over an entire height range from a predetermined height position of the neck to a lower end face of a gate mark, which remains to exist at a center of a bottom plate of the bottom; and the outer layer and the inner layer are peeled from each other, starting from an interface of lamination between the outer layer and the inner layer, and this interface is exposed outside at the lower end face of the gate mark and can be used as an air intake vent that enables outside air to be taken into the space between the outer layer and the inner layer
摘要:
The present invention relates to a preform (1), and resultant container (10), having at least a first layer (2) and a second layer (3) which forms an outer layer, relative to the first layer (2). The inner layer (2) comprises a pearlescent agent, while the outer layer (3) comprises a colorant, such that the resultant container (10) has a high gloss finish, is easy to manufacture, and does not result in colorant leaching into the contained fluid.