CA1132464A - Bottle made of saturated polyester resin and method of making the same - Google Patents
Bottle made of saturated polyester resin and method of making the sameInfo
- Publication number
- CA1132464A CA1132464A CA335,464A CA335464A CA1132464A CA 1132464 A CA1132464 A CA 1132464A CA 335464 A CA335464 A CA 335464A CA 1132464 A CA1132464 A CA 1132464A
- Authority
- CA
- Canada
- Prior art keywords
- polyester resin
- saturated polyester
- strip
- parison
- bottle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
Abstract of the Disclosure:
A bottle made of a saturated polyester resin and having one or more strip-shaped projection for the reinforcement and ornament purposes is provided, which bottle is produced by a method comprising the steps of preparing a parison having an opened upper end and a closed bottom end from a saturated polyester resin, welding a strip-shaped piece made of the same saturated polyester resin on said parison so as to ex-tend in the vertical direction, and then biaxially orientat-ing said parison and said strip-shaped piece as an integral body.
A bottle made of a saturated polyester resin and having one or more strip-shaped projection for the reinforcement and ornament purposes is provided, which bottle is produced by a method comprising the steps of preparing a parison having an opened upper end and a closed bottom end from a saturated polyester resin, welding a strip-shaped piece made of the same saturated polyester resin on said parison so as to ex-tend in the vertical direction, and then biaxially orientat-ing said parison and said strip-shaped piece as an integral body.
Description
6~
Background of the Invent The present invention relates to a bottle made of a saturated polyester resin provided with a vertically extending, strip-shaped projection on the trunk or body ~hereof.
The saturated polyester resins attract public attention for use as the materials for bottles, since they prevent soaking o~ any harmful materials such as solvent differing from other synthetic resinous materials conventionally used for making bottles and no poisonous gas i.s generated when combusted af~er disposal. However, melted saturated polyester resin is poor or deficient in fluidity as compared to other meltable materials and tends to gelatinize to make it difficult to mould there*rom a bottle of complicated contour and to form an embossed pattern on the outer face of the bottle.
Furthermore, a parison made of a saturated polyester resin is crystallized at the glass transition temperature due to the interrelation between the temperature and the time ~o lose its elongation capacity. As a resul~, it is necessary to maintain the temperature within an appropriate range if the parison made of a saturated polyester resin is biaxially oriented and it is extremely difficult to effect the desired biaxial orientation particularly when the thickness of the parison is varied in parts.
Summary of t~e Invention:
According to the invention there is provided in a bottle made of a saturated polyester resin having a neck and a body and formed by biaxial orientation of a parison of said saturated polyester resin, the improvement comprising a vertically extending, strip-shaped projection formed on the outer surface of said body by simultaneous biaxial orientation of a strip-shaped piece welded on the outer surface o~ said parison and said parison.
Also according to the invention there is provided a method o.f making a bottle made of a saturated polyester resin comprising the steps of injection moulding a parison having an open upper end and a closed bottom end from a saturated polyester resin material, welding a strip-shaped piece made of the saturated polyester resin on the body of said parisonJ biaxially orienting said parison sinn~ltaneously with said strip-shaped piece to form a bottle made of the saturated polyester resin, with a vertically extending, strip-shaped reinforcement formed on the body of the bottle.
Brief Description of the Drawin~s:
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a front view of a bottle made o a saturated polyester I resin according to the present invention;
Figure 2 is a front view of the parison used for moulding the bottle;
Figure 3 is a front view of the parison with the welded strip;~and Figure 4 is a sactional view taken along line IV-IV in Figure 3.
Detailed Description of_the Invention:
The bottle of a saturated polyester resin according to the present invention will be described with reference to the appended drawing. A bottle 1 comprises a trunk or body 2 rising up from the periphery of the bottom of the bottle, a shoulder 3 at the upper end of the body 2, and a neck 4 projecting from the center of the shoulder 3 and having a diameter smaller than that of the body. Projecting from the base portion of the neck 4 is a flange 5 against ~3~
which the bottom edge of a cap abutsO A thread 6 for engagement with a corresponding thread on the cap is provided on the outer face of the neckO
A projection 7a .is formed OTI the portion surrounding the base of the neck 4 and is integrally connected with two strip-shaped projections 7b which extend downwardly onto the bottom of the bottle at diametrically opposed peripheral portions of the body. It should be appreciated that the body
Background of the Invent The present invention relates to a bottle made of a saturated polyester resin provided with a vertically extending, strip-shaped projection on the trunk or body ~hereof.
The saturated polyester resins attract public attention for use as the materials for bottles, since they prevent soaking o~ any harmful materials such as solvent differing from other synthetic resinous materials conventionally used for making bottles and no poisonous gas i.s generated when combusted af~er disposal. However, melted saturated polyester resin is poor or deficient in fluidity as compared to other meltable materials and tends to gelatinize to make it difficult to mould there*rom a bottle of complicated contour and to form an embossed pattern on the outer face of the bottle.
Furthermore, a parison made of a saturated polyester resin is crystallized at the glass transition temperature due to the interrelation between the temperature and the time ~o lose its elongation capacity. As a resul~, it is necessary to maintain the temperature within an appropriate range if the parison made of a saturated polyester resin is biaxially oriented and it is extremely difficult to effect the desired biaxial orientation particularly when the thickness of the parison is varied in parts.
Summary of t~e Invention:
According to the invention there is provided in a bottle made of a saturated polyester resin having a neck and a body and formed by biaxial orientation of a parison of said saturated polyester resin, the improvement comprising a vertically extending, strip-shaped projection formed on the outer surface of said body by simultaneous biaxial orientation of a strip-shaped piece welded on the outer surface o~ said parison and said parison.
Also according to the invention there is provided a method o.f making a bottle made of a saturated polyester resin comprising the steps of injection moulding a parison having an open upper end and a closed bottom end from a saturated polyester resin material, welding a strip-shaped piece made of the saturated polyester resin on the body of said parisonJ biaxially orienting said parison sinn~ltaneously with said strip-shaped piece to form a bottle made of the saturated polyester resin, with a vertically extending, strip-shaped reinforcement formed on the body of the bottle.
Brief Description of the Drawin~s:
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a front view of a bottle made o a saturated polyester I resin according to the present invention;
Figure 2 is a front view of the parison used for moulding the bottle;
Figure 3 is a front view of the parison with the welded strip;~and Figure 4 is a sactional view taken along line IV-IV in Figure 3.
Detailed Description of_the Invention:
The bottle of a saturated polyester resin according to the present invention will be described with reference to the appended drawing. A bottle 1 comprises a trunk or body 2 rising up from the periphery of the bottom of the bottle, a shoulder 3 at the upper end of the body 2, and a neck 4 projecting from the center of the shoulder 3 and having a diameter smaller than that of the body. Projecting from the base portion of the neck 4 is a flange 5 against ~3~
which the bottom edge of a cap abutsO A thread 6 for engagement with a corresponding thread on the cap is provided on the outer face of the neckO
A projection 7a .is formed OTI the portion surrounding the base of the neck 4 and is integrally connected with two strip-shaped projections 7b which extend downwardly onto the bottom of the bottle at diametrically opposed peripheral portions of the body. It should be appreciated that the body
2 which is thin and somewhat weak is reinforced by the thick projections 7a and 7b which also serve as projected or embossed patterns.
The bottle made of a saturated polyester resin having the project-ln ions 7a and 7b may be formed by the following procedureO A parison 8 having anopen upper end and a closed bottom end, as shown in Figure 2, is injection moulded using a saturated polyester resin as the moulding materialO The parison 8 has a substantially uniform thickness throughout and includes the neck 4, the thread 6 and the flange 5 which are formed in the injection moulding step. In order to produce transparent parison 8, it is necessary to cool the same rapidly, immediately after the moulding step thereby to prevent crystal-lization resulting in whiteningO As has been described hereinbefore, if the saturated polyester resin materia.l is crystallized7 the subsequent biaxial orientation which will be described hereinafter in detail, becomes extremely difficult, The strip-shaped pieces 7b' made of saturated polyester resin are ~elded on the outer face of the parison 5 at diametrically opposed peripheral portions. The strip-shaped pieces 7b' extend vertically from the bottom of the parison 8. An annular piece 7a' is similarly welded to the parison below the flange 5 so that the flange is surrounded by the annular piece 7a', as shown in Figures 3 and 4O While in the Figures there is shown a parison with welded-~3~6~
on strip-shaped pieces 7b' having the ends covering the bottom of the parison 8, the lengths of the strip-shaped pieces may be such that the bottom of the parison 8 is not covered by them. It is preferable to color the strip-shaped pieces 7_' and the annular piece 7a' by adding with a desired coloring agent ~or ornamental purposes.
The parison 8 thus welded with the strip-shaped pieces 7b' and the annular piece 7a' is then put in blow-mou]ding mould cmd heated to a temperature enabling biaxial orientation and yet causing no whitening. After the strip-shaped pieces and the annular piece are conjoined to form an integral piece the parison 8 is inflated and elongated in the longitudinal direction to form the bottle 1. In this operation, the annular piece 7a' and the strip-shaped pieces 7b' are Eitted in recesses provided on the wall of the blow-moulding mould, so as to form, respectively~ the projections 7a and 7b after the biaxial orientation operation. As a result, the projection 7a and 7b become thicker than the other portions of the bottle 1 to reinforce the latter. Since no recess or groove is provided at the bottom of the mould, no projecting portion is formed at the bottom of the bottle.
If the outer face portions atpredetermined locations are heated to a higher temperature during heating of the parison 8, such portions are crystal-lized to form whitened patterns.
As will `be apparent from the foregoing description, the presentinvention is directed to a bottle made of saturated polyester resin and a method of making the same, wherein thicker projections 7a and 7b are formed on the trunk of the bottle, so that the bot*le becomes strong even when the wall of the other portions of the bottle is thin. Mo~eover, the projections form embossed patterns which serve as desirable ornaments. Further, the projections 7b or the ~,~ ! `, j j~7 ~
4~9L
l,ike may be easily formed by welding on strip-shaped pieces 7b' made of the same saturated polyester resin as the body portion of the bottle, a material that is difficult to process to form an embossed pattern. ~urthermore, by using colored strip-shaped pieces 7b' or the like, colored projecting patterns may be formed.
.
The bottle made of a saturated polyester resin having the project-ln ions 7a and 7b may be formed by the following procedureO A parison 8 having anopen upper end and a closed bottom end, as shown in Figure 2, is injection moulded using a saturated polyester resin as the moulding materialO The parison 8 has a substantially uniform thickness throughout and includes the neck 4, the thread 6 and the flange 5 which are formed in the injection moulding step. In order to produce transparent parison 8, it is necessary to cool the same rapidly, immediately after the moulding step thereby to prevent crystal-lization resulting in whiteningO As has been described hereinbefore, if the saturated polyester resin materia.l is crystallized7 the subsequent biaxial orientation which will be described hereinafter in detail, becomes extremely difficult, The strip-shaped pieces 7b' made of saturated polyester resin are ~elded on the outer face of the parison 5 at diametrically opposed peripheral portions. The strip-shaped pieces 7b' extend vertically from the bottom of the parison 8. An annular piece 7a' is similarly welded to the parison below the flange 5 so that the flange is surrounded by the annular piece 7a', as shown in Figures 3 and 4O While in the Figures there is shown a parison with welded-~3~6~
on strip-shaped pieces 7b' having the ends covering the bottom of the parison 8, the lengths of the strip-shaped pieces may be such that the bottom of the parison 8 is not covered by them. It is preferable to color the strip-shaped pieces 7_' and the annular piece 7a' by adding with a desired coloring agent ~or ornamental purposes.
The parison 8 thus welded with the strip-shaped pieces 7b' and the annular piece 7a' is then put in blow-mou]ding mould cmd heated to a temperature enabling biaxial orientation and yet causing no whitening. After the strip-shaped pieces and the annular piece are conjoined to form an integral piece the parison 8 is inflated and elongated in the longitudinal direction to form the bottle 1. In this operation, the annular piece 7a' and the strip-shaped pieces 7b' are Eitted in recesses provided on the wall of the blow-moulding mould, so as to form, respectively~ the projections 7a and 7b after the biaxial orientation operation. As a result, the projection 7a and 7b become thicker than the other portions of the bottle 1 to reinforce the latter. Since no recess or groove is provided at the bottom of the mould, no projecting portion is formed at the bottom of the bottle.
If the outer face portions atpredetermined locations are heated to a higher temperature during heating of the parison 8, such portions are crystal-lized to form whitened patterns.
As will `be apparent from the foregoing description, the presentinvention is directed to a bottle made of saturated polyester resin and a method of making the same, wherein thicker projections 7a and 7b are formed on the trunk of the bottle, so that the bot*le becomes strong even when the wall of the other portions of the bottle is thin. Mo~eover, the projections form embossed patterns which serve as desirable ornaments. Further, the projections 7b or the ~,~ ! `, j j~7 ~
4~9L
l,ike may be easily formed by welding on strip-shaped pieces 7b' made of the same saturated polyester resin as the body portion of the bottle, a material that is difficult to process to form an embossed pattern. ~urthermore, by using colored strip-shaped pieces 7b' or the like, colored projecting patterns may be formed.
.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a bottle made of a saturated polyester resin having a neck and a body and formed by biaxial orientation of a parison of said saturated polyester resin, the improvement comprising a vertically extending, strip-shaped projection formed on the outer surface of said body by simultaneous biaxial orientation of a strip-shaped piece welded on the outer surface of said parison and said parison.
2. A bottle made of a saturated polyester resin according to Claim 1, wherein said strip-shaped projection extends from the neck portion to the bottom of the bottle.
3. A bottle made of a saturated polyester resin according to Claim 2, wherein an annular projection integral with said strip-shaped projection is formed around the neck portion.
4. A bottle made of a saturated polyester resin according to Claim 1, wherein said strip-shaped projection is colored.
5. A method of making a bottle made of a saturated polyester resin comprising the steps of injection moulding a parison having an open upper end and a closed bottom end from a saturated polyester resin material, welding a strip-shaped piece made of the saturated polyester resin on the body of said parison, biaxially orienting said parison simultaneously with said strip-shaped piece to form a bottle made of the saturated polyester resin, with a vertically extending, strip-shaped reinforcement formed on the body of the bottle.
6. A method of making a bottle made of a saturated polyester resin according to Claim 5, wherein the strip-shaped piece is fitted in a recess of a blow-moulding mould during the step of biaxially orientation of the parison and the strip-shaped piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA335,464A CA1132464A (en) | 1979-09-12 | 1979-09-12 | Bottle made of saturated polyester resin and method of making the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA335,464A CA1132464A (en) | 1979-09-12 | 1979-09-12 | Bottle made of saturated polyester resin and method of making the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1132464A true CA1132464A (en) | 1982-09-28 |
Family
ID=4115125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA335,464A Expired CA1132464A (en) | 1979-09-12 | 1979-09-12 | Bottle made of saturated polyester resin and method of making the same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1132464A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113165213A (en) * | 2018-12-19 | 2021-07-23 | 宝洁公司 | Article with visual effect |
-
1979
- 1979-09-12 CA CA335,464A patent/CA1132464A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113165213A (en) * | 2018-12-19 | 2021-07-23 | 宝洁公司 | Article with visual effect |
| CN113165213B (en) * | 2018-12-19 | 2023-04-28 | 宝洁公司 | Article with visual effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |