US20030026977A1 - Adhesive tape - Google Patents
Adhesive tape Download PDFInfo
- Publication number
- US20030026977A1 US20030026977A1 US10/255,583 US25558302A US2003026977A1 US 20030026977 A1 US20030026977 A1 US 20030026977A1 US 25558302 A US25558302 A US 25558302A US 2003026977 A1 US2003026977 A1 US 2003026977A1
- Authority
- US
- United States
- Prior art keywords
- adhesive tape
- adhesive
- raw material
- film
- uniaxial drawing
- 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.)
- Abandoned
Links
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 60
- 239000000853 adhesive Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 230000002542 deteriorative effect Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 7
- 238000001723 curing Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
- B29C55/026—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets of preformed plates or sheets coated with a solution, a dispersion or a melt of thermoplastic material
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2809—Web or sheet containing structurally defined element or component and having an adhesive outermost layer including irradiated or wave energy treated component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
Definitions
- the present invention relates to a manufacturing method of an adhesive tape, for example, being stuck on inner side walls of a box made of corrugated cardboard to serve as an opener or a reinforcing member of the box, and the adhesive tape manufactured by the said method. More particularly, the present invention relates to a manufacturing method of an adhesive tape having high-strength and low-elongation, and the adhesive tape manufactured by the said method.
- a structure of a box, for example a corrugated carton 101 is as illustrated in FIG. 2.
- the corrugated carton 101 has side walls 103 .
- An adhesive tape 105 serving as an opener of the box 101 is stuck on the upper part and the inside of the side walls 103 .
- This kind of adhesive tape 105 serving as the box opener is normally stuck on this place, that is the upper part and the inside of the corrugated carton 101 , and there are further provided cuts A along the adhesive tape 105 being stuck on the corrugated carton 101 .
- a person will pick up any part of the cuts A on the side wall 103 , and then he will pull this part in the peripheral direction. Consequently, the part of the corrugated carton 101 will be peeled along the cuts A as well as along the adhesive tape 105 being stuck on the inner side walls of the corrugated carton 101 , thus the upper part of the corrugated carton 101 is opened.
- the adhesive tape 105 also serves as a reinforcing member of the corrugated carton 101 .
- a film or a sheet is produced by casting or forming, and then a uniaxial or biaxial drawing is performed thereon. After that, heat treatment is performed on the film or sheet for the purpose of surface activation, and then the film or sheet is wound as to be a roll. A release agent is applied on the back surface of the film or sheet, and then the film or sheet is heated. An adhesive agent is applied on the film or sheet, and then the film or sheet is heated. Finally, the film or sheet is slit. As a result, an adhesive tape having a desired width is obtained.
- the uniaxial drawing as above described means the stretching and orientating of a plastic film in one (longitudinal or lateral) direction at a temperature between the melting point and the second order transition point of the plastic film.
- the biaxial drawing as above described means the stretching and orientation of a plastic film in two (longitudinal and lateral) directions at a temperature between the melting point and the second order transition point of the plastic film.
- slitting or cutting of the fiberized film or sheet provides more remarkably longitudinal crack or fuzz because the fiberized film or sheet is slit in the perpendicular direction with respect to the fiberized direction, whereby the fiber is cut.
- the object of the present invention is to provide a manufacturing method of an adhesive tape which is free from longitudinal crack or fuzz, with no residual volatile component (derived from an adhesive agent) in a small-sized facility.
- a manufacturing method of adhesive tape comprising steps of: preparing a raw material of a biaxially drawn film or sheet; applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; and subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation.
- the manufacturing method of an adhesive tape as described above further comprising a post-heat treatment step of heating the drawn material, the uniaxial drawing step and the post-heat treatment step involving heating the release agent and the adhesive agent sufficiently to complete their cure reactions as well as to remove a volatile component of the adhesive agent, which otherwise would evaporate and give off a foul smell in use.
- a third embodiment of the invention there is provided the manufacturing method of an adhesive tape according to the first embodiment of the invention, in which the uniaxial drawing step is performed under drawing conditions where width, thickness, draw ratio, temperature, speed and period of time are so set suitably in given ranges that a resultant adhesive tape will possess desired width, thickness, strength and elongation.
- the manufacturing method of adhesive tape according to the first embodiment of the invention further comprising a step of slitting of the raw material at a predetermined width before the uniaxial drawing step.
- an adhesive tape manufactured by a method comprising steps of: preparing a raw material of a biaxially drawn film or sheet; applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; and subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation.
- the inventive manufacturing method is characterized by preparing a raw material of a biaxially drawn film or sheet, applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; and subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation. Consequently, the method inhibits the fiberization and requires no facility required for steps ranging from casting, forming to applying adhesive agent.
- heating during the uniaxial drawing step and the post-heat treatment step can complete the curing reaction of the release agent and the adhesive agent.
- some volatile component of the adhesive agent can be removed, which would otherwise volatize and give off a foul smell in use.
- the uniaxial drawing conditions that is, width, thickness, draw rate, temperature, speed and period of time can be so set suitably in given ranges that a resultant adhesive tape will possess desired width, thickness, strength and elongation.
- slitting the raw material in the width direction may be done, prior to the uniaxial drawing step.
- each of these bubbles has spherical shape (that is, the shape of bubble as it is), which is substantially the same as illustrated in FIG. 3.
- each of the bubbles is extended in the direction of the uniaxial drawing, or long and narrow, as illustrated in FIG. 4 (in the present case, the drawing is performed at a draw rate of about 2.7 times). That is to say, uniaxial drawing changes the bubbles from the FIG. 3 shape to the FIG. 4 shape.
- the adhesive tape manufactured according to the present invention can graphically be characterized in that the long and narrow bubbles elongated in the direction of the uniaxial drawing are seen on the adhesive tape.
- FIG. 1 is a perspective view of a manufacturing apparatus, which carries out a manufacturing method of an adhesive tape according to an embodiment of the present invention
- FIG. 2 is a perspective view of a box made of corrugated cardboard on which inner side wall an adhesive tape is stuck;
- FIG. 3 is a magnified view (magnification: 200) of an adhesive tape in which uniaxial drawing has not yet been performed.
- FIG. 4 is a magnified (magnification: 200) of an adhesive tape in which uniaxial drawing has been performed on the FIG. 3 adhesive tape according to the present invention.
- FIG. 1 is a perspective view showing a structure of a manufacturing apparatus, which carries out a manufacturing method of an adhesive tape according to an embodiment of the present invention.
- the raw material 1 is wound and take a roll of a biaxially or non-drawn film or sheet on the back surface a release agent has already been applied and to which an adhesive agent has already been applied.
- the raw material 1 is first transferred into a slitter 3 and slit at a predetermined width.
- the slit material is then introduced into a drawing apparatus 5 .
- the drawing apparatus 5 comprises a drawing roll 7 , a heating bath 9 , another drawing roll 11 and a tension roll 13 .
- the slit material is subjected to uniaxial drawing involving heating.
- the drawn material is then introduced into a heat treatment apparatus 15 .
- the heat treatment apparatus 15 comprises a heat treatment roll 17 , a heating bath 19 , and another thermal treatment roll 21 .
- the heat treatment apparatus 15 carries out a post-heat treatment under given conditions.
- the heat-treated material is then introduced into a winder 23 , from which an adhesive tape as the final product comes out.
- the present invention has the following effects.
- the adhesive tape having high-strength and low-elongation can be obtained upon uniaxial drawing.
- adhesive tapes having “high-strength and low-elongation” are defined by ones having the characteristics (tensile strength: 30-60 kgf/mM 2 ; breaking elongation: 15-35%; adhesive strength: 600-900 g/10 mm 2 ; and heat shrinkage: not more than 5%/120° C., 15 minutes in hot air).
- the raw material can be obtained easily. Further, it is possible to obtain various raw materials, which are suitable for manufacturing of small-quantity and at the same time various types of products.
- the embodiment performs the slitting prior to the uniaxial drawing
- the scope covered by the present invention is not limited to the disclosure of the embodiment and may the case where the splitting is performed after the uniaxial drawing.
- the thus obtained adhesive tape has no residual volatile component of the adhesive agent. Consequently, when the adhesive tape is actually used, there is no emission of a foul smell.
- the raw material can be obtained easily, and is suitable for manufacturing of and at the same time various types of products.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesive Tapes (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
A manufacturing method of adhesive tape, comprising steps of: preparing a raw material of a biaxially drawn film or sheet; applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation. The obtained adhesive tape has long and narrow bubbles elongated in the uniaxial drawing direction thereon.
Description
- 1. Field of Invention
- The present invention relates to a manufacturing method of an adhesive tape, for example, being stuck on inner side walls of a box made of corrugated cardboard to serve as an opener or a reinforcing member of the box, and the adhesive tape manufactured by the said method. More particularly, the present invention relates to a manufacturing method of an adhesive tape having high-strength and low-elongation, and the adhesive tape manufactured by the said method.
- 2. Description of Related Art
- A structure of a box, for example a
corrugated carton 101, is as illustrated in FIG. 2. Thecorrugated carton 101 hasside walls 103. Anadhesive tape 105 serving as an opener of thebox 101 is stuck on the upper part and the inside of theside walls 103. This kind ofadhesive tape 105 serving as the box opener is normally stuck on this place, that is the upper part and the inside of thecorrugated carton 101, and there are further provided cuts A along theadhesive tape 105 being stuck on thecorrugated carton 101. When thecorrugated carton 101 is to be opened, a person will pick up any part of the cuts A on theside wall 103, and then he will pull this part in the peripheral direction. Consequently, the part of thecorrugated carton 101 will be peeled along the cuts A as well as along theadhesive tape 105 being stuck on the inner side walls of thecorrugated carton 101, thus the upper part of thecorrugated carton 101 is opened. - The
adhesive tape 105 also serves as a reinforcing member of thecorrugated carton 101. - A manufacturing method of the above discussed adhesive tape according to a prior art will be summarized as follows.
- First, a film or a sheet is produced by casting or forming, and then a uniaxial or biaxial drawing is performed thereon. After that, heat treatment is performed on the film or sheet for the purpose of surface activation, and then the film or sheet is wound as to be a roll. A release agent is applied on the back surface of the film or sheet, and then the film or sheet is heated. An adhesive agent is applied on the film or sheet, and then the film or sheet is heated. Finally, the film or sheet is slit. As a result, an adhesive tape having a desired width is obtained.
- The uniaxial drawing as above described means the stretching and orientating of a plastic film in one (longitudinal or lateral) direction at a temperature between the melting point and the second order transition point of the plastic film. The biaxial drawing as above described means the stretching and orientation of a plastic film in two (longitudinal and lateral) directions at a temperature between the melting point and the second order transition point of the plastic film.
- However, the prior art manufacturing method of an adhesive tape as above discussed has the following disadvantageous points.
- First, in the thus obtained adhesive tape as the final product, there exists longitudinal crack or fuzz. This problem is caused due to occurrence of fiberization of the film or sheet. In addition, the manufacturing of the prior art adhesive tape as above discussed requires a large-sized production facility, which would result in higher production cost.
- Further, slitting or cutting of the fiberized film or sheet (in order to obtain an adhesive tape of a desired width) provides more remarkably longitudinal crack or fuzz because the fiberized film or sheet is slit in the perpendicular direction with respect to the fiberized direction, whereby the fiber is cut.
- Second, there still remains some residual volatile component of the adhesive agent after the applied adhesive agent has been heat-dried. When the adhesive tape is used, this residual component is volatized while giving off a foul smell. This problem is caused due to insufficient heating and drying of the film or sheet after application of the adhesive agent.
- In the light of problems, which have been described as above, the object of the present invention is to provide a manufacturing method of an adhesive tape which is free from longitudinal crack or fuzz, with no residual volatile component (derived from an adhesive agent) in a small-sized facility.
- For the object as above discussed, according to a first embodiment of the present invention, there is provided a manufacturing method of adhesive tape comprising steps of: preparing a raw material of a biaxially drawn film or sheet; applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; and subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation.
- According to a second embodiment, there is provided the manufacturing method of an adhesive tape as described above, further comprising a post-heat treatment step of heating the drawn material, the uniaxial drawing step and the post-heat treatment step involving heating the release agent and the adhesive agent sufficiently to complete their cure reactions as well as to remove a volatile component of the adhesive agent, which otherwise would evaporate and give off a foul smell in use.
- According to a third embodiment of the invention, there is provided the manufacturing method of an adhesive tape according to the first embodiment of the invention, in which the uniaxial drawing step is performed under drawing conditions where width, thickness, draw ratio, temperature, speed and period of time are so set suitably in given ranges that a resultant adhesive tape will possess desired width, thickness, strength and elongation.
- According to a fourth embodiment of the invention, there is provided the manufacturing method of adhesive tape according to the first embodiment of the invention, further comprising a step of slitting of the raw material at a predetermined width before the uniaxial drawing step.
- According to a fifth embodiment of the invention, there is provided an adhesive tape manufactured by a method comprising steps of: preparing a raw material of a biaxially drawn film or sheet; applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; and subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation.
- According to a sixth embodiment of the invention, there is provided the adhesive tape as described above, wherein long and narrow bubbles elongated in the direction of the uniaxial drawing are seen on the adhesive tape.
- The inventive manufacturing method is characterized by preparing a raw material of a biaxially drawn film or sheet, applying a release agent on a back surface of the film; applying an adhesive agent on a front surface of the film; and subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation. Consequently, the method inhibits the fiberization and requires no facility required for steps ranging from casting, forming to applying adhesive agent.
- If the post-heat treatment is subjected to the drawn material, heating during the uniaxial drawing step and the post-heat treatment step can complete the curing reaction of the release agent and the adhesive agent. In addition to the completion of the reaction of the release agent and the adhesive agent, some volatile component of the adhesive agent can be removed, which would otherwise volatize and give off a foul smell in use.
- The uniaxial drawing conditions, that is, width, thickness, draw rate, temperature, speed and period of time can be so set suitably in given ranges that a resultant adhesive tape will possess desired width, thickness, strength and elongation.
- Further, slitting the raw material in the width direction may be done, prior to the uniaxial drawing step.
- During application of the adhesive agent, an extremely small amount of bubbles are inevitably mixed in the applied coat due to volatilization of the adhesive agent, etc. In the prior art method in which an adhesive agent is applied after uniaxial drawing has been performed, each of these bubbles has spherical shape (that is, the shape of bubble as it is), which is substantially the same as illustrated in FIG. 3. However, according to the present invention in which uniaxial drawing is performed after an adhesive agent has been applied, each of the bubbles is extended in the direction of the uniaxial drawing, or long and narrow, as illustrated in FIG. 4 (in the present case, the drawing is performed at a draw rate of about 2.7 times). That is to say, uniaxial drawing changes the bubbles from the FIG. 3 shape to the FIG. 4 shape.
- Therefore, the adhesive tape manufactured according to the present invention can graphically be characterized in that the long and narrow bubbles elongated in the direction of the uniaxial drawing are seen on the adhesive tape.
- The invention will be described below in detail with reference to the accompanying drawings, in which:
- FIG. 1 is a perspective view of a manufacturing apparatus, which carries out a manufacturing method of an adhesive tape according to an embodiment of the present invention;
- FIG. 2 is a perspective view of a box made of corrugated cardboard on which inner side wall an adhesive tape is stuck;
- FIG. 3 is a magnified view (magnification: 200) of an adhesive tape in which uniaxial drawing has not yet been performed; and
- FIG. 4 is a magnified (magnification: 200) of an adhesive tape in which uniaxial drawing has been performed on the FIG. 3 adhesive tape according to the present invention.
- An embodiment of the present invention will now be described in detail with reference to FIG. 1. FIG. 1 is a perspective view showing a structure of a manufacturing apparatus, which carries out a manufacturing method of an adhesive tape according to an embodiment of the present invention.
- There is a raw material1 at the right end of FIG. 1. The raw material 1 is wound and take a roll of a biaxially or non-drawn film or sheet on the back surface a release agent has already been applied and to which an adhesive agent has already been applied.
- This type of raw material1 is available on ordinary commercial market.
- The raw material1 is first transferred into a slitter 3 and slit at a predetermined width. The slit material is then introduced into a
drawing apparatus 5. Thedrawing apparatus 5 comprises adrawing roll 7, a heating bath 9, anotherdrawing roll 11 and atension roll 13. After the slit material is introduced into thedrawing apparatus 5, the slit material is subjected to uniaxial drawing involving heating. - If uniaxial drawing conditions, that is, width, thickness, draw rate, temperature, speed and period of time are set suitably, there will be manufactured an adhesive tape having desired material characteristics in regard to the width, thickness, strength and elongation.
- The drawn material is then introduced into a
heat treatment apparatus 15. Theheat treatment apparatus 15 comprises aheat treatment roll 17, aheating bath 19, and anotherthermal treatment roll 21. Theheat treatment apparatus 15 carries out a post-heat treatment under given conditions. The heat-treated material is then introduced into awinder 23, from which an adhesive tape as the final product comes out. - For example, when the uniaxial drawing was performed under the conditions (width: 18 mm; thickness: 65 μm; draw rate: 3 times; temperature: 160° C.), and then the post-heat treatment was performed at a temperature between 190 and 191° C., there was obtained an adhesive tape having a width of 4 mm and a thickness of 60 μm.
- The present invention has the following effects.
- First, the adhesive tape having high-strength and low-elongation can be obtained upon uniaxial drawing.
- In this connection, adhesive tapes having “high-strength and low-elongation” are defined by ones having the characteristics (tensile strength: 30-60 kgf/mM2; breaking elongation: 15-35%; adhesive strength: 600-900 g/10 mm2; and heat shrinkage: not more than 5%/120° C., 15 minutes in hot air).
- Second, there is no residual volatile component of the adhesive agent in the adhesive tape. Consequently, when the adhesive tape is actually used, there is no emission of a foul smell. This is because the curing reaction of the adhesive agent has been completed upon heating during the uniaxial drawing and the post-heat treatment.
- Third, the facility required for steps ranging from casting to adhesive agent applying is no longer required, which has been required in the prior art method. Thus the manufacturing facility can be simplified, thereby the cost for the manufacturing facility can be reduced.
- Fourth, according to the present invention, since the raw material1 is cut at a predetermined width by the slitter 3 before the uniaxial drawing step, the occurrence of the longitudinal crack and fuzz around the cut portion is more effectively prohibited.
- Fifth, according to the present invention, since uniaxial drawing is carried out after the raw material1 is cut at a predetermined width by the slitter 3, the unevenness of thickness of the drawn material in the width direction can remarkably be reduced. Consequently, it is possible to reduce scraps produced by cutting both ends (in the width direction) of the drawn material in order to obtain the flat surface thereof, which may contribute to the increase of yield.
- Sixth, the raw material can be obtained easily. Further, it is possible to obtain various raw materials, which are suitable for manufacturing of small-quantity and at the same time various types of products.
- Although the embodiment performs the slitting prior to the uniaxial drawing, the scope covered by the present invention is not limited to the disclosure of the embodiment and may the case where the splitting is performed after the uniaxial drawing.
- As above discussed, according to the present invention, it is possible to inhibit the disadvantage due to the fiberization, thus obtaining the adhesive tape having high-strength and low-elongation.
- The thus obtained adhesive tape has no residual volatile component of the adhesive agent. Consequently, when the adhesive tape is actually used, there is no emission of a foul smell.
- The facility required for steps ranging from casting to adhesive agent applying is no longer required. Thus the manufacturing facility can be simplified, thereby the cost for the manufacturing facility can be reduced.
- Further, in regard to the adhesive tape according to the present invention, longitudinal crack or the fuzz at the cut end.
- The raw material can be obtained easily, and is suitable for manufacturing of and at the same time various types of products.
Claims (5)
1. An adhesive tape manufactured by a method comprising steps of:
preparing a raw material of a biaxially drawn film or sheet;
applying a release agent on a back surface of the film;
applying an adhesive agent on a front surface of the film; and
subjecting the raw material to uniaxial drawing under heated conditions without deteriorating releasing and adhesive performance of the raw material to produce a base material of an adhesive tape having high-strength and low-elongation.
2. The adhesive tape as claimed in claim 1 , in which the manufacturing method further comprises a post-heat treatment step of heating the drawn material,
the uniaxial drawing step and the post-heat treatment step involving heating the release agent and the adhesive agent sufficiently to complete their cure reactions as well as to remove a volatile component of the adhesive agent, which otherwise would evaporate and give off a foul smell in use.
3. The adhesive tape as claimed in claim 1 , in which the uniaxial drawing step is performed under drawing conditions where width, thickness, draw ratio, temperature, speed and period of time are so set suitably in given ranges that a resultant adhesive tape will possess desired width, thickness, strength and elongation.
4. The adhesive tape as claimed in claim 1 , in which the manufacturing method further comprises a step of slitting of the raw material at a predetermined width before the uniaxial drawing step.
5. An adhesive tape as claimed in claim 1 , wherein long and narrow bubbles elongated in the direction of the uniaxial drawing are seen on the adhesive tape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/255,583 US20030026977A1 (en) | 1999-06-22 | 2002-09-27 | Adhesive tape |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP174805/1999 | 1999-06-22 | ||
JP17480599A JP3569649B2 (en) | 1999-06-22 | 1999-06-22 | Production method of adhesive tape and adhesive tape |
US09/594,698 US6478999B1 (en) | 1999-06-22 | 2000-06-16 | Process of making adhesive tape |
US10/255,583 US20030026977A1 (en) | 1999-06-22 | 2002-09-27 | Adhesive tape |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/594,698 Division US6478999B1 (en) | 1999-06-22 | 2000-06-16 | Process of making adhesive tape |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030026977A1 true US20030026977A1 (en) | 2003-02-06 |
Family
ID=15984982
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/594,698 Expired - Fee Related US6478999B1 (en) | 1999-06-22 | 2000-06-16 | Process of making adhesive tape |
US10/255,583 Abandoned US20030026977A1 (en) | 1999-06-22 | 2002-09-27 | Adhesive tape |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/594,698 Expired - Fee Related US6478999B1 (en) | 1999-06-22 | 2000-06-16 | Process of making adhesive tape |
Country Status (6)
Country | Link |
---|---|
US (2) | US6478999B1 (en) |
JP (1) | JP3569649B2 (en) |
KR (1) | KR100491422B1 (en) |
CN (1) | CN1189530C (en) |
MY (1) | MY125249A (en) |
TW (1) | TW452533B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070224416A1 (en) * | 2004-05-25 | 2007-09-27 | Lintec Corporation | Easily Applicable Pressure-Sensitive Adhesive Sheet and Process for Production Thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451533A (en) * | 1983-02-09 | 1984-05-29 | Minnesota Mining And Manufacturing Company | Dispensable polypropylene adhesive-coated tape |
-
1999
- 1999-06-22 JP JP17480599A patent/JP3569649B2/en not_active Expired - Lifetime
-
2000
- 2000-06-16 US US09/594,698 patent/US6478999B1/en not_active Expired - Fee Related
- 2000-06-20 MY MYPI20002768 patent/MY125249A/en unknown
- 2000-06-21 KR KR10-2000-0034233A patent/KR100491422B1/en not_active IP Right Cessation
- 2000-06-22 CN CNB00109405XA patent/CN1189530C/en not_active Expired - Fee Related
- 2000-06-22 TW TW089112260A patent/TW452533B/en not_active IP Right Cessation
-
2002
- 2002-09-27 US US10/255,583 patent/US20030026977A1/en not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4451533A (en) * | 1983-02-09 | 1984-05-29 | Minnesota Mining And Manufacturing Company | Dispensable polypropylene adhesive-coated tape |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070224416A1 (en) * | 2004-05-25 | 2007-09-27 | Lintec Corporation | Easily Applicable Pressure-Sensitive Adhesive Sheet and Process for Production Thereof |
Also Published As
Publication number | Publication date |
---|---|
MY125249A (en) | 2006-07-31 |
CN1281019A (en) | 2001-01-24 |
JP3569649B2 (en) | 2004-09-22 |
KR20010049585A (en) | 2001-06-15 |
JP2001003016A (en) | 2001-01-09 |
KR100491422B1 (en) | 2005-05-24 |
TW452533B (en) | 2001-09-01 |
CN1189530C (en) | 2005-02-16 |
US6478999B1 (en) | 2002-11-12 |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |