JPS62146137A - Bottle body made of saturated polyester resin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a 13-phase Borienether resin product. This invention relates to a stretch blow molded bottle.

[Conventional technology]

Saturated polyester @Fushikiji! I) Stretch blow molded bottles have many advantages such as excellent gas barrier properties, glass-like transparency, toughness that does not break even when dropped, and hygiene.

However, when this biaxially stretched blow-molded bottle made of saturated polyester resin is molded into the shape of a normal glass bottle, the bottom of the bottle is not stretched. Since the bottom part is not stretched, the mechanical strength is poor, and deformation occurs due to internal pressure loads, and when filled with high-temperature contents, it causes deformation due to heat shrinkage, and , Yong E.
A single body is formed which has the problem of causing lf conversion.

Various inventions regarding bottom structures have been made to overcome this drawback.

As one of them, as shown in Figures 9 to 12, it has a central recessed part surrounded by a protruding annular heel part at the bottom, and the radially inner edge of the heel part is recessed. The recessed part (1) is moved to the recessed part (A).
) A plurality of outwardly protruding ribs 124 are arranged symmetrically around the central axis 1j of the bottle so as to interrupt the outer surface of the bottle, and the longitudinal direction of each rib 124) is distributed in the radial direction. A new bottom structure was invented.
(See No. 330).

In this bottom structure, six pairs of seven adjacent ribs are 1) separated from each other by a portion of the wall of the recessed portion.

Also, the lateral edges between the ribs and the outer surfaces of the recessed portions are shaped to smoothly transition into adjacent portions of the one-angle structure.

[1114 inventions! [Problems to be Solved] However, in the above-mentioned known invention, the recessed portions are left unstretched and the heat resistance is not sufficient. Therefore, for example, when contents such as juice are heated and filled with a 9-turbine type filling machine, the contents are cooled to room temperature after filling, and a reduction in pressure occurs due to volumetric contraction of the contents.
Deformed cedar on the bottom of the carcass may occur.

The problem that the present invention seeks to solve is to provide a body made of saturated polyester resin that has internal pressure deformation resistance, heat deformation resistance, and vacuum absorbency.

[Means for solving problems]

The saturated polyester resin bottle of the present invention is a saturated polyester resin biaxial blow-molding plant body, and has an annular bottom heel portion (1) that contacts the floor surface, and has a radially inner side (1) of the bottom heel portion (1). It has an annular flat panel part whose bottom is raised toward the inside of the bottle body and is substantially parallel to the floor surface, and further has a recessed part toward the inside of the unit in the radial direction, and the main part of the surface of the recessed part. is an upper surface of a quadrangular pyramid assembly in which a plurality of quadrangular pyramids are arranged concentrically in a plurality of rows in the circumferential direction.

Accordingly, in the present invention, the "biaxial stretch blow-molded extension made of saturated polyester resin" is obtained by molding a bottomed parison by injection molding using polyethylene terephthalate, and then blow-molding the obtained bottomed parison. or a hollow molded layer formed by molding the hollow molded layer and then heat-treating it at a temperature above the glass transition point and below the melting point of polyethylene terephthalate while maintaining its shape.

Furthermore, the "biaxially molded heavy body made of saturated polyester resin" of the present invention is not limited to a single layer hollow molded old body, but may also be a multilayer hollow molded old body.

Examples of multilayer hollow molded bodies to which the present invention is applied include polyarylate, polycarbonate, polybutylene terephthalate, copolymers of polyester and polycarbonate, polyaceter, nylon, etc. by injection molding method. Polyarylate/polyethylene terephthalate, polyethylene terephthalate/polycarbonate/polyethylene terephthalate, polyethylene terephthalate/polybuterene terephthalate/polyethylene terephthalate, polyethylene terephthalate/copolymer of polyester and polycarbonate/polyethylene terephthalate 7 Dalat, Polybutylene terephthalate, Polyethylene terephthalate/
A hollow molded layer is formed by forming a three-layer bottomed parison of nylon/polyethylene terephthalate, etc., and then blow-molding the obtained bottomed parison, or after molding the hollow molded layer, the hollow molded layer is molded while retaining its shape. An example is a hollow molded layer formed by heat treating polyethylene terephthalate at a temperature above the glass transition point and below the melting point.

Next, in this specification, the term "quadrangular pyramid" refers not only to a quadrangular pyramid with a completely square base, but also to a square pyramid with a rhombus, trapezoid,
It also includes irregularly shaped quadrangular pyramids such as large parallelograms.

In the present invention, the main part of the surface of the recess is formed into an uneven surface shape that is undulating along the upper surface of the quadrangular pyramid assembly, but the recess area other than the main part is formed by a plurality of continuous irregularities of the triangular pyramid. It is also possible to form it into a surface shape.

[Function] In the present invention, by forming the surface of the recessed portion into an uneven surface shape 5y that undulates along the upper surface of the quadrangular pyramid assembly, the portion of the recessed portion is stretched at a relatively high degree of elongation.

In addition, 4 that rises and falls and connects to form a triangular paulownia eye! i is a flea).

When the internal pressure of the four bodies is applied vertically to the recess, the slope area of the recess corresponding to the surface of each quadrangular pyramid is pressed in the vertical direction. As a result, the concave surface area corresponding to each base or connecting part of the quadrangular pyramid assembly has mutually opposite directions from the concave slope area corresponding to both view angle pyramids adjacent to each other via the ridge or connecting part. A horizontal force is applied.

In other words, the recessed surface regions corresponding to the respective quadrangular pyramids are in a state of mutual support, and the function of resisting even high internal pressure can be achieved.

Next, in the present invention, the flat panel part is provided to the heel part through the inclined wall part, and when the internal pressure of the aged body is reduced, it causes a deformation similar to a hinge, It functions to relieve the pressure applied to the aged body.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

Figures 1 and 2 show a first embodiment of the saturated polyester resin ring of the present invention. , FIG. 1 is a plan view of the bottom of an elderly body according to the first embodiment of the present invention, and FIG.
The right side is a diagram showing an end face cut along the OA line shown in the figure, and the right side is a diagram showing an end face cut along the OB line shown in the first figure.

The bottle of the present invention has an annular bottom heel (1
), and a flat panel portion 121 is provided on the radially inner side of the bottom heel portion, which is flush with the annular floor surface which is raised toward the inside of the bottle through a slanted wall portion. Further, a recessed portion (3) directed toward the inside of the bottle body is provided on the radially inner side of the flat panel portion 42+. In addition, (4) is the recessed part (3
), and (5) represents an outwardly directed spherical convex portion provided at the center of the bottom.

The surface of the recessed part (3) is a plurality of triangular planes in which the bottom surface shape is a rhombus or a rhombus-like square pyramid, and the upper surface of the square pyramid is overflowing and undulating on the upper surface of a collection of square pyramids in which multiple rows of square pyramids are concentrically continuous in the circumferential direction. It is formed into a concave and convex surface shape that is connected to each other.

That is, square pyramid surfaces (top surfaces of square pyramids) A+, A2, A3
, .
B1 is located between 1 and A2, B2 is located in the darkness between A2 and A, and in the same way, Bn (n23) is located between adjacent An and An+1, so B1, B2, etc.・
・are arranged in a ring.

Due to this concave and convex curved structure of the concave part (3), the bottom surface area is greatly expanded compared to a pure four-sided curved surface.During the biaxial stretch blow molding process, the bottom concave part (3) This structure has the effect of promoting stretching of this part and giving a stretching effect. Furthermore, since the vertices a1 to a8 and b1 to b8 of the square pyramid protrude inside the bottle, the internal pressure deformation resistance and heat deformation resistance are significantly improved.

Next, the flat panel part +21 has the function of relieving the pressure applied to the aged body by pulling down the deformation, similar to a hinge, when the inside of the body is depressurized. This function works effectively when old bodies are filled at high temperatures using a Kawandar Pressure Manshiki filling machine.

In other words, when a pressure of +0.2 to Q, 13Kp/-d is applied, the flat panel part is displaced downward and comes into contact with the bottom, thereby increasing the internal volume by a certain amount,
When the filling machine and katsuunder pressure subsides, the internal volume is reduced by blocking it back to its original position, thereby reducing the head space. In addition, after kibub sealing and cooling, the volume of the liquid content decreases (for depressurization due to two reasons,
The flat panel portion is displaced upwardly, so that the internal volume relieves the vacuum.

FIG. 6 and the fourth factor show the second embodiment.

FIG. 6 is a plan view of the bottom of an elderly body according to the second embodiment of the present invention, and the fourth factor is the end surface cut along the OA line shown in FIG. It is a figure which shows the cut end surface.

This embodiment differs from the first embodiment in that each quadrangular pyramidal surface is smaller than that of the first embodiment, and the annular arrangement of the quadrangular pyramidal surfaces is formed in four concentric rows. Also, the recessed part (3
) is formed from an uneven curved surface formed by connecting only triangular planes.

Also, square pyramid vertices a 1~a B, b1'OB, 01~C
B, al (all 8 are located protruding around the inside of the bet body.

Furthermore, FIG. 5 and FIG. 6 show a third embodiment.

FIG. 5 is a plan view of the bottom of a single unit according to the third embodiment of the present invention, and FIG. 6 shows the end surface cut at the OA gland shown in FIG. 5 on the left, and the end surface cut at 0BIvJ shown in FIG. 5 on the right. It is an end view.

This example is the first and '! Unlike the pJ2 embodiment, the surface of the recessed portion (3) is formed in the shape of an uneven surface that rises and falls on the upper surface of a continuum of quadrangular pyramids in which quadrangular pyramids each having a trapezoidal base are connected. The concave-convex surface bending force 1 is formed by connecting triangular planes formed concentrically with an annular array of quadrangular pyramidal surfaces A1 to A8 having a trapezoidal base and an annular array of squares @tfnB1 to B8.

Furthermore, FIGS. 7 and 8 show a fourth embodiment.

FIG. 7 is a plan view of the bottom of a unit according to the fourth embodiment of the present invention, and FIG. 8 shows the seventh embodiment on the left. The end face cut along line A is shown, and the right side is a view showing the end face cut along line 0′B shown in FIG. 7.

In this embodiment, the recessed portion (3) has quadrangular pyramidal surfaces A1 to A
8, an annular arrangement of quadrangular pyramidal surfaces B1 to B8, and an annular arrangement of irregularly shaped triangular pyramidal surfaces c1 to c6 are formed concentrically, and the concave-convex curved surface is formed by connecting triangular planes.

〔Effect of the invention〕

The simple substance of the present invention described above is disclosed in Japanese Patent Publication No. 57-5733.
Unlike the single unit having multiple ribs extending from the inside of the bottom recessed part around to the heel part as described in 0 etc., the recessed part continuously forms a square pyramid in the soil in the circumferential direction. By connecting them, a sharp triangular curved surface is formed, so that internal pressure deformation resistance and heat deformation resistance can be significantly improved. Furthermore, since the apex of the square pyramid is located inside the unit and protrudes inward, the apex of the square pyramid is formed sharply during the stretch forming process, and many of these sharp square pyramid surfaces are formed mutually. ), the heat deformation resistance of the bottom recessed portion is significantly improved.

In addition, by providing a flat panel section, we are waiting for the depressurization and pressurization relaxation functions that go into the hot fill.

[Brief explanation of drawings]

Embodiment 7 of the present invention is shown in FIGS. 1 to 8, and the first figure is a plan view of the bottom of the unit according to the first embodiment of the present invention, and the second figure is a plan view of the bottom of the unit according to the first embodiment of the present invention.
The left side shows the end face cut with the OA strip shown in the first figure, and the right side shows '! 1111 Figure 111B shows the end face cut along the line B. Figure 6 is a plan view of the bottom of the unit according to the second embodiment of the present invention. The right side is a diagram showing the end face cut along the OB line shown in the third figure, FIG. The end face cut with OAa is shown, and the right side is the 5th unofficial OB! FIG. 7 is a plan view of the bottom of a unit according to the fourth embodiment of the present invention. FIG. 8 is a diagram showing an end surface cut along the OA- line shown in FIG. 7 on the left side, and FIG. Figure 9 shows the side surface of the bottle-shaped container described in Japanese Patent Publication No. 57-57330, and Figure m10 shows an enlarged view of the bottom of the bottle in Figure 9. Figure 'IJJJ11 is an enlarged fractured cross-sectional view using the 6-3 ball in Figure 9, and Figure 12 is an enlarged sectional view of Figure 10 (
FIG. 8) is an enlarged fragmented cross-sectional view of the bottle shown in the first diagram according to 4-4 spirit. Patent applicant Dai Nippon Printing Co., Ltd. Agent Atsushi Konishi Patent attorney Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 11 Figure 7 ``C amendment (method) f'f+f'l agency L2 official character Kadoshi j4in1 middle/
f'1's ノ, 71, Showafil 60 +1:
i! l,,'lν [1 No. 288099 2, Name of I and Akira 1゜Saturated polyester ME1 Resin single piece 3ilijlE Name (28(J) Dai Nippon Printing Co., Ltd. representative name Yoshitoshi Kitajima Showa 6. March 5, 1 (shipment date: May 25, 1986)
6) If the number of inventions increases due to the amendment, one copy of the power of attorney will be supplemented as shown in the attached sheet. (According to the engraving and attached sheet of the specification originally attached to the 21st anniversary date (no changes to the contents).

Claims (1)

[Claims] A biaxially stretched blow-molded bottle made of saturated polyester resin has an annular bottom heel that touches the floor, and the bottom heel has an annular floor that is raised toward the inside of the bottle in the radial direction. It has a parallel plane panel part, and further has a recessed part facing inside the bottle body on the inside in the radial direction, and the main part of the surface of the recessed part has a plurality of rows of a plurality of square pyramids arranged concentrically in the circumferential direction. A bottle made of saturated polyester resin, characterized in that it is formed into an uneven surface shape that undulates along the upper surface of an aggregate of quadrangular pyramids.