GB2107271A - A tube and a process for its production - Google Patents
A tube and a process for its production Download PDFInfo
- Publication number
- GB2107271A GB2107271A GB08223082A GB8223082A GB2107271A GB 2107271 A GB2107271 A GB 2107271A GB 08223082 A GB08223082 A GB 08223082A GB 8223082 A GB8223082 A GB 8223082A GB 2107271 A GB2107271 A GB 2107271A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- sealing composition
- open end
- polyamide resin
- conical
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 30
- -1 polypropylene Polymers 0.000 claims abstract description 14
- 239000004743 Polypropylene Substances 0.000 claims abstract description 13
- 229920001155 polypropylene Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 229920006345 thermoplastic polyamide Polymers 0.000 claims abstract description 11
- 238000007664 blowing Methods 0.000 claims description 2
- 239000004816 latex Substances 0.000 description 6
- 229920000126 latex Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/20—Flexible squeeze tubes, e.g. for cosmetics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/02—Body construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Tubes (AREA)
- Package Closures (AREA)
Abstract
In order to put conical tubes (1) together to form a tube rod, the centrifugal method is applied to provide a cylindrical tube on the inside of an open end (5) with an annular strip (7) of a sealing composition based on a thermoplastic polyamide resin of an average molecular weight having a softening point of from about 100 to 120 DEG C and containing a proportion of a micronised polypropylene. The sealing composition is then brought to a temperature of from 100 to 120 DEG C for a few seconds. The tube is then provided with a conical expansion (6) of a constant conicity towards the open end (5). <IMAGE>
Description
SPECIFICATION
A tube and a process for the production of a tube case
This invention relates to a conical tube having an open end which in its fold region has on the inside an annular strip of a sealing composition.
The invention also relates to a process for the production of a tube case.
The annular strip of the sealing composition on the inside of the tube is provided to prevent the filling material from escaping after the tube has been folded. The sealing composition lies between the folded parts of the tube, and its seals off the fold. A seal of this type is particularly necessary in the case of filling materials which leak, such as salves, oils, greases, creams, and in the case of filling materials from which odours emanate.
An adhesive is known to be used as the sealing strip, which preferably consists of a latex emulsion. The water is made to evaporate by drying, so that the elastic latex composition remains. The latex ring is dried in a furnace at a temperature of from about 75 to 11 OOC for 1 or 2 minutes. In the case of conical tubes which are inserted one inside another to form a tube rod, chiefly for reasons of saving space, there is the difficulty of applying the relatively thick and usually self-adhesive latex composition onto the inside of the tube end so that the individual tubes do not bond together when inserted one inside another.For this purpose, the tube is usually also widened in the region of the sealing strip such that the annular strip of the sealing composition does not rest against the circumference of the underlying tube in each case. In another method, attempts have been made to overcome the difficulty mentioned by deforming the material of the tube in the fold region by inwardly directed annular creases, the internal diameter of the annular creases being smaller than the internal diameter of the annular strip of sealing composition. This means that additional working procedures have to be carried out on the tube to prevent the widened tubes which are inserted one inside another from bonding together.The annular strip of latex emulsions has another disadvantage in that it cannot be applied in a regular thickness, which may have an unfavourable effect when additional characteristics are imprinted on the finished tube fold. Moreover, the folds themselves do not have a regular thickness.
The object of the present invention is to provide conical tubes, in which the tubes may be inserted one inside another to form a tube rod, while retaining a uniform conicity, and without the danger of bonding occurring in the region of the annular strip-shaped sealing composition.
Accordingly, the present invention provides a conical tube having an open end which is arranged to be folded and which in the fold region has on the inside an annular strip of a sealing composition, wherein the sealing composition is based on a thermoplastic polyamide resin of an average molecular weight having a softening point of from about 100 to 1 200C and containing a proportion of a micronised polypropylene, and wherein the tube has a constant conicity and widens towards the open end.
A sealing composition of this type has numerous advantages: after a very short drying time, the composition does not have a subsequent adhesive effect, a few seconds with hot air at about 1 200C being sufficient for drying; it may be applied in a relatively thin layer; and a layer thickness of about 10 ym is sufficient.
Moreover, the application of the annular strip of the sealing composition is completely homogeneous, in contrast to the latex emulsion which results in an uncontrollably irregular application. The regular and homogeneous layer thickness has a further advantage in that when the tube is folded, a better and more reliable seal is achieved at the tube fold than has hitherto been possible. This is obtained by a complete and uniform contact between two layers having flat surfaces when the conical tube end is compressed to form the fold. The folds are produced in a clean and precise manner by using thermally heated folding jaws. Consequently, the manufacturers information, such as charge numbers and the like may be more easily imprinted into the fold. The sealing composition according to the present invention simplifies and facilitates the production process.The provision of a furnace is unecessary. Also, it is no longer necessary to mechanically process the conical end of the tube by providing an expanded pocket or annular creases.
The proportion of micronised polypropylene to thermoplastic polyamide resin may amount to as much as about 10%. In general, from 0.5 to 8% of micronised polypropylene suffice as an addition to the thermoplastic polyamide resin. A preferred range is from about 3 to 6% of micronised polypropylene.
The invention also provides a process for the production of a tube case having an open end which is arranged to be folded and which in the fold region has on the inside an annular strip of a sealing composition, wherein in the centrifugal method a cylindrical tube case is provided on the inside of the open end with an annular strip of a sealing composition based on a thermoplastics polyamide resin of an average molecular weight and having a softening point of from about 100 to 1 200C and containing a proportion of a micronised polypropylene, the sealing composition is then brought to a temperature of about 100 to 1 200C for a few seconds, and thereafter the tube case is provided with a conical expansion of a constant conicity widening towards the open end, the conical tube cases then being put together to form a casing rod.
The annular sealing composition is preferably dried by blowing with hot air. This has the advantage that this working cycle may be carried out during the transport of the cylindrical tube case to the conification machine or in the inlet to this machine. In this method, a furnace does not have to be provided.
The sealing composition used in the present invention preferably has the following composition: 100 parts of thermoplastic polyamide resin of an average molecular weight and having a softening point of from 100 to 1 200C, combined with from 0.5 to 8 parts of micronised polypropylene. The average molecular weight preferably ranges from about 1500 to 4000 g/mol. The annular layer which is applied may be from 10 to 100 ssm thick.
An embodiment of the present invention is schematically illustrated in the accompanying drawing, by example only, and described below:
At one end, the tube case 1 has a closed shoulder 2 with a nipple 3 which is designed as a threaded nipple and which supports a sealing cap 4. Towards the open end 5, the tube body 6 is widened in a conical shape, the conicity being regular and constant. An annular sealing strip 7 is provided on the inside of the conical tube body 6.
The strip 7 consists of a sealing composition based on a thermoplastic polyamide resin of an average molecular weight, preferably within the range of 10,000 to 50,000, and having a softening point of from about 100 to 1200 C, and containing a proportion of a micronised polypropylene. The layer thickness of the annular sealing strip is from 10 to 100 ,um. The annular strip may be from 3 to 12 mm wide.
The conical tubes which are inserted one inside another form a so-called tube rod, and the annular sealing strips 7 may rest in each case on the next inside tube without the tubes bonding together. The tube is made of aluminium in a known manner.
The sealing composition which has been described is also advantageous for tubes which are filled and folded in a cylindrical shape.
Claims (9)
1. A conical tube having an open end which is arranged to be folded and which in the fold region has on the inside an annular strip of a sealing composition, wherein the sealing composition is based on a thermoplastic polyamide resin of an average molecular weight having a softening point of from about 100 to 1 200C and containing a proportion of a micronised polypropylene, and wherein the tube has a constant conicity and widens towards the open end.
2. A conical tube according to claim 1, wherein the proportion of micronised polypropylene to thermoplastic polyamide resin amount to about 10%.
3. A conical tube according to claim 1 or 2, wherein from 0.5 to 8 parts of micronised polypropylene are provided per 100 parts of thermoplastic polyamide resin.
4. A conical tube according to claim 3, wherein from 3 to 6 parts of polypropylene are provided per 100 parts of thermoplastic polyamide resin.
5. A conical tube according to any of claims 1 to 4, wherein the sealing strip is from 10 to 100 ,um thick.
6. A conical tube substantially as herein described with reference to the accompanying drawing.
7. A process for the production of a tube case having an open end which is arranged to be folded and which in the fold region has on the inside an annular strip of a sealing composition, wherein in the centrifugal method a cylindrical tube case is provided on the inside of the open end with an annular strip of a sealing composition based on a thermoplastic polyamide resin of an average molecular weight and having a softening point of from about 100 to 1 200C and containing a proportion of a micronised polypropylene, the sealing composition is then brought to a temperature of about 100 to 1 200C for a few seconds, and thereafter the tube case is provided with a conical expansion of a constant conicity widening towards the open end, the conical tube cases then being put together to form a casing rod.
8. A process according to claim 7, wherein the annular sealing composition is dried by blowing with hot air for a few seconds.
9. A process for the production of a tube case substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813131666 DE3131666A1 (en) | 1981-08-11 | 1981-08-11 | TUBE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2107271A true GB2107271A (en) | 1983-04-27 |
| GB2107271B GB2107271B (en) | 1985-07-31 |
Family
ID=6139043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08223082A Expired GB2107271B (en) | 1981-08-11 | 1982-08-11 | A tube and a process for its production |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH656856A5 (en) |
| DE (1) | DE3131666A1 (en) |
| FR (1) | FR2511344B1 (en) |
| GB (1) | GB2107271B (en) |
| IT (1) | IT1212528B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004043817A1 (en) * | 2002-11-12 | 2004-05-27 | Jung-Min Lee | Multi-stackable tube container with inclined spouting portion |
| CN112495723A (en) * | 2020-12-03 | 2021-03-16 | 深圳市长盈精密技术股份有限公司 | Glue spraying method for cigarette rod shell light-transmitting hole |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3940950A1 (en) * | 1988-12-16 | 1990-06-21 | Hoell Karl Gmbh Co Kg | Interior sealant for collapsible tubes - consists of ring of thin polyamide-based coating of specific softening point range applied internally by gun and rapidly dried by hot air |
| DE4027549A1 (en) * | 1990-08-31 | 1992-03-05 | Tubex Gmbh | METHOD FOR PRODUCING A STRIP OF SEALING LACQUER ON A TUBE AND DEVICE FOR CARRYING OUT THE METHOD |
| DE102011051332A1 (en) * | 2011-06-24 | 2012-12-27 | Joachim Jaeschke | Tube blank filled with filling material e.g. paste-like substance, used in enterprises, has tube wall having blow moldable material, whose inner circumference in rear portion is larger than the outer circumference in front portion |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1223759A (en) * | 1959-05-05 | 1960-06-20 | Flexible tube and apparatus for obtaining this tube | |
| AU8119375A (en) * | 1974-05-21 | 1976-11-18 | Dale Ltd John | Sealant expanded tube |
| EP0004253B1 (en) * | 1978-03-10 | 1980-09-03 | H. Obrist & Co. AG | Stackable tube body provided with a layer of dense material, method for producing such a tube body and apparatus for carrying out the method |
-
1981
- 1981-08-11 DE DE19813131666 patent/DE3131666A1/en active Granted
-
1982
- 1982-08-04 CH CH4691/82A patent/CH656856A5/en not_active IP Right Cessation
- 1982-08-10 IT IT8222806A patent/IT1212528B/en active
- 1982-08-10 FR FR8213945A patent/FR2511344B1/en not_active Expired
- 1982-08-11 GB GB08223082A patent/GB2107271B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004043817A1 (en) * | 2002-11-12 | 2004-05-27 | Jung-Min Lee | Multi-stackable tube container with inclined spouting portion |
| CN112495723A (en) * | 2020-12-03 | 2021-03-16 | 深圳市长盈精密技术股份有限公司 | Glue spraying method for cigarette rod shell light-transmitting hole |
| CN112495723B (en) * | 2020-12-03 | 2022-12-20 | 深圳市长盈精密技术股份有限公司 | Glue spraying method for cigarette rod shell light-transmitting hole |
Also Published As
| Publication number | Publication date |
|---|---|
| CH656856A5 (en) | 1986-07-31 |
| IT1212528B (en) | 1989-11-30 |
| GB2107271B (en) | 1985-07-31 |
| DE3131666C2 (en) | 1990-04-26 |
| DE3131666A1 (en) | 1983-02-24 |
| IT8222806A0 (en) | 1982-08-10 |
| FR2511344A1 (en) | 1983-02-18 |
| FR2511344B1 (en) | 1986-08-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20020810 |