CN1781812A - Synthetic resin container having improved shape stability - Google Patents
Synthetic resin container having improved shape stability Download PDFInfo
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- CN1781812A CN1781812A CN 200510127671 CN200510127671A CN1781812A CN 1781812 A CN1781812 A CN 1781812A CN 200510127671 CN200510127671 CN 200510127671 CN 200510127671 A CN200510127671 A CN 200510127671A CN 1781812 A CN1781812 A CN 1781812A
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- container
- synthetic resin
- resin container
- indentures
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Abstract
A synthetic resin container, wherein a waist dividing the drum part of the container into upper and lower parts is formed of an annular groove surrounding the drum part and projected toward the inside of the container, reinforcement ribs with a level higher than the bottom of the annular groove and lower than the surface of the drum part are installed in the annular groove, lateral ribs for reinforcement having recessed parts with the same level as the surface of the container or forming a very slight step from the surface of the container are provided on the drum part of the container, a plurality of streaks converging toward the center of the drum part are provided on the drum part, and recessed multi-face walls tilted toward the converged points of the streaks are divided and formed by the streaks.
Description
Technical field
The present invention is relevant a kind of synthetic resin container that meets the demand of wall thinning, and particularly relevant a kind of rigidity reduction phenomenon that can prevent effectively that the wall thinning from being caused, and the synthetic resin container with required shape hold facility (conformality).
Background technology
In various synthetic resin containers, the most common with the PET bottle that polyethylene terephthalate (PET) resin is made, to handle easily because of it is in light weight, the good glass container of outward appearance and the transparency is compared not inferior, and cost is also low.Therefore, in recent years the PET bottle how as the container of food, beverage, cosmetics or medicament or the like.
Yet this synthetic resin container but has pair less shortcoming of external force opposing intensity.For instance, when the user held container body and pours out its content, the place of holding is promptly unavoidable to produce distortion.For improving the resistivity of this kind container to external force, similarly be that it frustrates Qu Qiangdu (bucklingstrength) and rigidity or the like, the wall thickness of container must be done suitably to adjust, and the bottle part also palpiform become longitudinal rib, transverse ribs or waist reinforced structures such as (around the grooves of container body).
But,, wish that but the wall of container can be done thinlyyer (being that weight is lighter), to reduce the resin demand of container monomer by saving resource in recent years to reduce the trend of waste.For satisfying this demand, the problem that promptly can't avoid the container rigidity further to reduce.Particularly have polygonal cross section, and when being formed with waist, as be subjected to the external force to the angular direction at the angle of waistline end, the cross section of container just becomes rhombus easily at container.Hence one can see that, and for having the synthetic resin container of waist, desired person promptly is under the situation of wall attenuation, and the face shaping that still can keep container body is constant, and can keep enough Qu Qiangdu and rigidity of frustrating.
In addition, the heat impedance of synthetic resin container is also not good, and particularly for PET resin (polyethylene terephthalate resin) container, its temperature upper limit of filling content is about 85～87 ℃.If temperature is higher than this scope, then with content-filled when advancing container, its main body will be met thermal contraction and is out of shape.Be head it off, can carry out at least twice biaxial stretch-formed blowing program and heat treatment process therebetween, to improve the resistance to effect of heat of container.For instance, by flat 7-67732 number disclosed technology of Japanese patent gazette as can be known, its manufactured product can bear higher content filling temp.
Yet, for this kind container, when reducing its wall thickness (for example being that the resin demand of 2 liters of packaging containers is reduced to below 55 grams by 69 grams) when cutting down the consumption (lightweight) of resin, because the weight of content itself (press by head, water head pressure) and hi-heat influence, the lower part of container body can expand outwardly, and can't keep original shape.Especially when being provided with when preventing step-down baffle that step-down causes being out of shape this situation especially severe that expands outwardly in the container.
In addition, though the face shaping of container can be effectively kept in the formation of transverse ribs, because of being subjected to the influence of wall of container attenuation, rib easily is heated and bending, so that can't effectively bring into play its reinforcing effect.Therefore, improving the resistance to effect of heat of synthetic resin container, when making it can bear higher filling temperature, wishing that also container can still can keep its original shape under the situation of wall thinning, that is have good conformality.
Summary of the invention
In order to solve every problem of above-mentioned known skill, the present invention proposes a kind of not because of the wall thinning reduces its rigidity, and possesses the synthetic resin container of required conformality.
With regard to a viewpoint of the present invention, this synthetic resin container has polygonal cross section, and has at least one its body region is divided into the waist of two sections, and this waist is by outstanding towards container inside, and constitutes around the annular ditch groove of container body.Also be provided with the reinforcement rib on this annular ditch groove, its upper limb is higher than the bottom of annular ditch groove, but is lower than the surface of container body, and this reinforcement rib is arranged on each angle end in polygonal cross section, and strides across the scope of this angle end.
The top of reinforcement rib is preferably and is circular-arc in addition.
The synthetic resin container of another viewpoint of the present invention is formed with biaxial stretch-formed blowing method, has the transverse ribs that reinforcement is used on it, this transverse ribs have and container body surface with high, or and the container body surface between the wheel well of drop is slightly only arranged.
In addition, above-mentioned wheel well is preferably the central authorities of position in transverse ribs.
Moreover transverse ribs is preferably interior side-prominent towards container body, and the length at the two ends of this transverse ribs does not extend to the column structure (after a while this column structure will be described) of container.
In addition, the preferable step-down baffle that is provided with on the main body of synthetic resin container of the present invention.
Moreover synthetic resin container of the present invention is preferable to have inwards outstanding longitudinal rib on its main body, can have the sunk part that is lower than vessel surface around this longitudinal rib.
In addition, synthetic resin container of the present invention is preferable to have a tetragonal cross section, and it comprises the column structure that is formed on around the main body at least everywhere, and this column structure is by being constituted along axially extended microscler concave surface of container or convex surface.
The present invention's synthetic resin container of a viewpoint is more also formed by biaxial stretch-formed blowing method, has several indentures that entad extend on its main body, and these indentures define towards it and concentrate the recessed multiaspect shape wall district of place's bevelled.
This recessed multiaspect shape wall district is preferably as the step-down baffle, and it can have tetragonal profile, and each indenture is to be extended by tetragonal four angles central authorities to concentrate, and its concentrate the place preferable be formed with vessel axis to vertical horizontal chase.
Description of drawings
Fig. 1 is the front elevation of the synthetic resin container with waist of first embodiment of the invention;
Fig. 2 (a) and Fig. 2 (b) are respectively the birds-eye view and the upward view of the container of Fig. 1, and Fig. 2 (c)～(i) figure is respectively the section-drawing of c-c～i-i line of cut of Fig. 1;
Fig. 3 is the front elevation of the reinforcement rib of container shown in Figure 1;
Fig. 4 is the front elevation of the waistline of container shown in Figure 1;
Fig. 5 is the front elevation of the synthetic resin container of second embodiment of the invention;
Fig. 6 is a synthetic resin container shown in Figure 5 section-drawing along the 6-6 line of cut;
Fig. 7 is the front elevation of the synthetic resin container of third embodiment of the invention;
Fig. 8 is the front elevation of the synthetic resin container of fourth embodiment of the invention;
Fig. 9 is a synthetic resin container shown in Figure 8 section-drawing along the 9-9 line of cut;
Figure 10 is the main portion of step-down baffle;
Figure 11 is the front elevation of the synthetic resin container of fifth embodiment of the invention;
Figure 12 is a synthetic resin container shown in Figure 11 section-drawing along the 12-12 line of cut; And
Figure 13 is in the container shown in Figure 11, the enlarged drawing of step-down baffle.
11: waist
11a: annular ditch groove
12: the reinforcement rib
21,31: container body
22: the oral area of container
23: groove
24,34～39: the step-down baffle
25,32: transverse ribs
25a: wheel well
26,33: longitudinal rib
27: column structure
27a: concave surface
28: sunk part
34a～d, 35a～d, 38a～d, 39a～d: recessed multiaspect shape wall
40: horizontal chase
C-c i-i, 6-6,9-9,12-12: line of cut
L: the surface elevation of container body
L1: the bottom of trench height of annular ditch groove 11a
L2: the upper limb height of reinforcement rib 12
P: the axle center of container
R: indenture
R0: the centrostigma of indenture
The specific embodiment
Fig. 1～Fig. 4 is the synthetic resin container of first embodiment of the invention.The capacity of this container is 2.0 liters, and its cross section slightly is quadrangle.Label 11 is for being divided into container body in the waist of two sections.This waist 11 is by outstanding towards container inside, and constitutes around the annular ditch groove 11a in one week of bottle.
Knownly be arranged on the container body, with its waist that is distinguished into two sections simply recessed shape of tool only, be the rigidity that is used for improving container originally.But because of the wall thinning so, the intensity of this part can reduce, thus on container top or the bottom frustrate song easily when adding loading, and recessed easily in holding container the time.
Please refer to Fig. 3, it is the front elevation that illustrates the reinforcement rib 12 of container shown in Figure 1.This kind reinforcement rib 12 is arranged on the waist 11, and the function as the container skeleton is arranged.Therefore, the deflection when holding Container bottle body is very little, and the frustrating Qu Qiangdu and also can significantly improve of container.
As shown in Figure 3, for avoiding the problem of stress concentration, and the face shaping of stable container, it is circular-arc that reinforcement rib 12 can form mono-.Moreover, shown in the enlarged drawing of the waistline of Fig. 4, be effective its function of performance, the upper limb height L2 of reinforcement rib 12 is lower than the surface elevation L of container body, but is higher than the bottom of trench height L1 of annular ditch groove 11a.Moreover the extension amplitude system of reinforcement rib 12 on (container body) peripheral direction strides across the angle end parts of container, and extends to the waistline that is positioned at the wall of container front.
Though the illustrated person of the foregoing description is the tool quadrangular section, and is formed with the container of reinforcement rib 12, the cross sectional shape of this container is not limited only to icon person.That is container of the present invention not only can have oblong, pentagon or hexagon prismatic shapes, also is suitable for circular cross sectional shape.Moreover though the above person is 2.0 liters a container, the capacity aspect of container is also unrestricted, and promptly below 500 milliliters, the smaller container of 1.0 liters or 1.5 liters, or the super large container more than 2.0 liters is all applicable.
The resin that constitutes container can be thermoplastic base resins such as polyethylene terephthalate resin, and this container can use the blowing method to make, and its raw material is the pre-shape thing with extrusion shaping or injection molding method gained.
The container of above-mentioned blowing is filled with normal temperature or hi-heat content and all can.Particularly when content is high-temperature fluid, used container is except being fit to this common method formation of the biaxial stretch-formed blowing method of single, also be fit to form, with the further resistance to effect of heat that improves container with at least twice biaxial stretch-formed blowing program of inserting furnace run therebetween.But no matter be the container that adopts that a kind of method for making gained, as long as its main body has waist, and this waist is provided with reinforcement rib 12, all can reach the effect of improving intensity.
As mentioned above, in Fig. 1～4 embodiment that illustrated, waist 11 is by outstanding to container inside and constituted around the annular ditch groove 11a of container body; And, be higher than annular ditch groove 11a bottom and be lower than the container body surface by upper limb, and the top is the design of circular-arc reinforcement rib 12, can prevent under the situation of wall of container thinning that the waistline that grips from producing distortion.Moreover, this kind design significantly lifting container frustrate Qu Qiangdu or rigidity.
Fig. 5～Fig. 6 is the synthetic resin container of second embodiment of the invention, and wherein label 21 is a container body, and 22 is the oral area integrally formed with container body 21.Label 23 designs groove on container body 21 for promoting rigidity, and it is divided into two sections with container body 21, and label 24 is the step-down baffle.The function of step-down baffle 24 is for preventing the container deformation phenomenon, and it is the volume change person of causing because of the content cooling.
In addition, label 25 is for being formed on the container body, and the transverse ribs of step-down baffle 24 is crossed in crosscut.The middle body of transverse ribs 25 its length directions has and the container body flush, or and the container body surface between the wheel well 25a of drop is slightly only arranged.
Label is and the reinforcement longitudinal rib of transverse ribs arranged spaced that 27 is 4 formed column structures of part around the bottle.This column structure 27 is made of the lengthwise polyline shaped concave surface 27a that extends along the container axis direction.
The synthetic resin container that makes with the biaxial stretch-formed forming process of single, and the synthetic resin container that reaches furnace run therebetween through at least twice biaxial stretch-formed blowing program, the latter for example is the flat 7-67732 revealer of institute of Japanese patent gazette, all is known synthetic resin container kind.Stress residual on the base portion of these two kinds of containers all can significantly reduce, and the density of resin material also can increase, so the resistivity that externally increases temperature is higher.Yet, under the trend of thinning wall with the resin demand of minimizing container monomer, for general this container,, also can't avoid weight (head pressure) or the high temperature crooked problem of this transverse ribs because of content even it is provided with the transverse ribs of keeping its conformality.In this case, be plastic deformation because transverse ribs produces, so even after content cools off, its shape still can't be restored, and will make the degraded appearance of container.Yet, as Fig. 5～shown in Figure 6 because the wheel well 25a that forms on the transverse ribs 25 is identical with the height on container body surface, or and the container body surface between very little drop is only arranged, so can prevent transverse ribs 25 single-piece bendings, and can keep the original shape of container.Simultaneously, transverse ribs 25 also can be brought into play its function effectively, makes container have higher rigidity.Moreover transverse ribs 25 is preferably crosscut and crosses step-down baffle 24, promptly along its Width configuration.
In addition, though the two ends of transverse ribs 25 shown in Figure 5 extend to a column structure 27 respectively, for exempting from the function of column structure 27 is exerted an adverse impact, transverse ribs 25 is preferable not extend to column structure.In addition, for make container thereon or the bottom when applying loading column structure 27 be difficult for producing and frustrate Qu Xianxiang, this column structure 27 should have the concave surface 27a of polyline shaped or the convex surface 27a of R shape.
25 close column structure 27 places of each transverse ribs are provided with longitudinal rib 26.Because the setting of longitudinal rib 26 is arranged, so when it being out of shape because of loading, can produce distortion at fixing position (end direction of transverse ribs 25 in the present embodiment) at holding container.Therefore, after the loading that causes distortion disappeared, container can directly be returned to original shape.That is to say that the recovery after the container deformation is promoted.
Please refer to Fig. 7, it is the synthetic resin container of third embodiment of the invention.In the present embodiment, being provided with on every side of longitudinal rib 26 is lower than Container bottle body depression in the surface part 28, that is to say that the contour shape of longitudinal rib 26 when container is shaped can appear in one's mind out.By the setting of sunk part 28, the reinforcing effect at end place, the nearly angle of container will more increase.Simultaneously, the length of transverse ribs 25 is shorter, does not extend to column structure 27.If adopt above-mentioned design, the anti-Qu Qiangdu of frustrating of container of quadrangular section of then having will more improve, and the recovery behind the container deformation also will further be strengthened.
Then, carry out twice biaxial stretch-formed blowing program and furnace run therebetween, and with the polyethylene terephthalate resin as raw material when forming container, be according to following main points.
At first, with extruding the pre-shape thing heating of shaping or injection molding, make it be plastic state, its temperature for example is 70～130 ℃, and is preferably 90～120 ℃.Then, at 50～230 ℃ (preferable 70～180 ℃) and extend 4～22 times (preferable 6～15 times of multiples, make bottle have oversized dimensions (oversize), promptly its capacity is 1.2～2.5 times of the predetermined product of finishing) condition enactment under, carry out once biaxial stretch-formed blowing program.Then, the blowing product of gained under 110～255 ℃, are preferablely heat-treated step under 130～200 ℃, forcing its dimensional contraction is original 0.60～0.95 times, to remove residual stress.Then, under the temperature of 60～170 ℃ (preferable 80～150 ℃), carry out the biaxial stretch-formed blowing program second time.Certainly, as not adopting above-mentioned condition, directly so that once biaxial stretch-formed blowing program formation container is also passable.
As mentioned above, on the good plastic holding device main body of Fig. 5～Fig. 6 or resistance to effect of heat shown in Figure 7, be formed with the transverse ribs 27 that reinforcement is used, this transverse ribs 27 has with vessel surface contour, or and vessel surface between the wheel well 27a of difference in height is slightly only arranged, with under the situation of thinning wall of container, make container keep higher conformality with the reduction resin demand.
Fig. 8～Figure 10 is the synthetic resin container of fourth embodiment of the invention, wherein label 31 is a container body, 32 and 33 reinforcement that are respectively the suitable part that is formed on container body 31 are with transverse ribs and longitudinal rib, label 34～39 then is the step-down baffle, and it for example is to be arranged in a linear on container body 31 as icon.
As shown in the figure, 36 and 37 have smooth surface in the step-down baffle 34～39,34,35,38 and 39 then have indenture (the inwardly outstanding indenture) R that concentrates towards the central point extension, it defines several recessed multiaspect shape wall districts, those walls 34a～34d, 35a～35d, 38a～38d and 39a～39d tilt towards indenture centrostigma R0, and details as shown in figure 10.
Because the step-down baffle 34,35,38 and 39 among the embodiment that the 8th～10 figure is has recessed multiaspect shape wall district all separately, and indenture R can be used as the skeleton of reinforcement step-down baffle, and can avoid pressing the container expansion phenomenon that is caused because of the head of content.Simultaneously, step-down baffle 34,35,38 and 39 whole wall all can absorb the deflection that causes because of inner pressure relief, and its function can not reduce because of the existence of indenture R.
In addition, as shown in Figure 8, also be fit under this situation use step-down baffle 36 and 37, with the shape of stable container with flat surfaces.That is to say that the present invention can suitably be used in combination the step-down baffle of tool flat surfaces and the step-down baffle of the recessed multiaspect wall of tool in the design of structure of container.
Figure 11～13 illustrate the synthetic resin container of fifth embodiment of the invention.The synthetic resin container of this embodiment and the difference of Fig. 8～that shown in Figure 10 are to be formed with horizontal chase 40 on the indenture centrostigma R0 of step-down baffle 34,35,38 and 39, and its trend is vertical with the axial P of container.The design of this horizontal chase 40 is for the container that prevents that further promotes step-down baffle 34,35,38 and 39 is pressed the effect of expanding because of head.
In addition, though in the explanation of the 5th embodiment that Figure 11～Figure 13 illustrated, recessed multiaspect wall is useful on the less step-down baffle of thickness 34,35,38 and 39, but the recessed multiaspect wall of this kind also can be set directly on the container body 31, not only limits and uses on the step-down baffle.
As mentioned above, in the 5th embodiment of Figure 11～shown in Figure 13, because the bottle of synthetic resin container is provided with several indentures of entad concentrating, and those indentures define to the recessed multiaspect wall district of centrostigma bevelled, so this synthetic resin container can have good resistance to effect of heat.Therefore, even under the situation of thinning wall of container, still can keep higher conformality with reduction resin use amount.
By above content as can be known, the present invention can solve the various problems of known skill, can have, and prevents that the rigidity that is caused because of the wall of container thinning from reducing problem with imitating, and makes synthetic resin container have required conformality.
Claims (6)
1. synthetic resin container, it is characterized in that, this container has a polygonal cross section, and have a waist that its body region is divided into two sections, this waist is by outstanding towards this container inside, and constitutes around the annular ditch groove of this container body one circle, this annular ditch groove is provided with the upper limb height and is higher than its bottom of trench again, and be lower than the reinforcement rib on this container body surface, and this reinforcement rib is arranged on each angle end in polygonal cross section, and strides across the scope of this angle end.
2. synthetic resin container as claimed in claim 1 is characterized in that the top of this reinforcement rib is circular-arc.
3. a synthetic resin container is characterized in that, it is to make with biaxial stretch-formed blowing method, and is formed with a plurality of indentures that entad converge on its main body, and those indentures define towards the recessed multiaspect shape wall district of the centrostigma bevelled of those indentures.
4. synthetic resin container as claimed in claim 3 is characterized in that, wherein should be recessed into multiaspect shape wall district as a step-down baffle.
5. synthetic resin container as claimed in claim 4 is characterized in that wherein the profile of step-down baffle is a quadrangle, and those indentures are to be concentrated by these tetragonal four angle hearts to extend.
6. as claim 3,4 or 5 described synthetic resin containers, it is characterized in that, wherein more be provided with axial vertical horizontal chase on this centrostigma with this container.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001297405 | 2001-09-27 | ||
| JP2001295930 | 2001-09-27 | ||
| JP2001295405 | 2001-09-27 | ||
| JP2001295405A JP2003104347A (en) | 2001-09-27 | 2001-09-27 | Waisted container made of synthetic resin |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028188373A Division CN1260099C (en) | 2001-09-27 | 2002-09-26 | Synthetic resin container with shape retainability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1781812A true CN1781812A (en) | 2006-06-07 |
| CN100569594C CN100569594C (en) | 2009-12-16 |
Family
ID=19116847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101276715A Expired - Fee Related CN100569594C (en) | 2001-09-27 | 2002-09-26 | The synthetic resin container of improved shape stability |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2003104347A (en) |
| CN (1) | CN100569594C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018053926A1 (en) * | 2016-09-22 | 2018-03-29 | 上海普丽盛包装股份有限公司 | Packaging container and blank therefor |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7014056B2 (en) * | 2003-09-25 | 2006-03-21 | Graham Packaging Company, L.P. | 4-sided container with smooth front and back panels that can receive labels in a variety of ways |
| JP5029859B2 (en) * | 2005-06-30 | 2012-09-19 | 株式会社吉野工業所 | Synthetic resin housing |
| JP4697631B2 (en) * | 2005-07-29 | 2011-06-08 | 株式会社吉野工業所 | Plastic bottle |
| US7568588B2 (en) * | 2005-08-16 | 2009-08-04 | Graham Packaging Company, L.P. | Container with contour |
| JP4846468B2 (en) * | 2006-06-30 | 2011-12-28 | 株式会社吉野工業所 | Plastic bottle |
| JP5283437B2 (en) * | 2008-06-27 | 2013-09-04 | 北海製罐株式会社 | Plastic bottle |
-
2001
- 2001-09-27 JP JP2001295405A patent/JP2003104347A/en active Pending
-
2002
- 2002-09-26 CN CNB2005101276715A patent/CN100569594C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018053926A1 (en) * | 2016-09-22 | 2018-03-29 | 上海普丽盛包装股份有限公司 | Packaging container and blank therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003104347A (en) | 2003-04-09 |
| CN100569594C (en) | 2009-12-16 |
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