CN216837786U - Flexographic printing is with pasting version bubble cotton tape - Google Patents

Abstract

The utility model relates to a flexographic printing is with pasting version bubble cotton tape, including laminating in proper order from the type layer, first pressure sensitive adhesive layer, PET enhancement layer, second pressure sensitive adhesive layer, the cotton layer of bubble, PE enhancement layer and third pressure sensitive adhesive layer. The utility model discloses a two-sided reinforcing structure of new PET PE had both avoided two PE structures at the dimensional stability defect of XY direction, because the existence of sleeve bonding face PE reinforcing film, can further improve sleeve bonding face adhesion strength simultaneously, and then can let the cotton sticky tape of bubble that takes this structure as the basis obtain great promotion on operability and reusability.

Description

Pasting foam adhesive tape for flexography

Technical Field

The invention belongs to the technical field of adhesive tapes, and particularly relates to foam with high structural strength and good fitting property, and a reusable double-sided foam adhesive tape for flexographic printing plates, which is prepared from the foam.

Background

The green printing is the basic national policy of 'saving resources and protecting environment' carried out by the printing industry of China, and has become a consensus in the industry for accelerating the important measures for promoting the ecological civilization construction of the whole industry. Flexography is one of the green printing alternatives recognized by the industry as having a growing prospect. With the progress of various technologies, the flexography is more and more in line with the national environmental protection policy and the green development direction of the printing industry, and meanwhile, the product quality is more and more popular with more and more consumers due to the ranks of high-quality printing. Many aspects of data show that flexography in China is showing a vigorous development trend, flexography business occupies more and more bits, and the industry concentration is continuously improved. Flexography is widely used in the fields of corrugated paper boxes, labels, aseptic liquid packaging, paper cup and paper bags, napkin paper and the like, and gradually occupies a leading position.

The plate pasting adhesive tape is an adhesive tape for adhering the flexible printing plate, and plays a very important role in the flexography no matter how the flexography technology is updated. The current mainstream is used for the two-sided bubble cotton sticky tape that flexographic printing wainscot used, and its bubble cotton substrate structure roughly has two kinds, and one is two-sided PE/PE drenches membrane reinforcing structure, and another kind is PET membrane single face reinforcing structure.

The double-sided PE/PE laminating film reinforcing structure can ensure excellent attaching performance of the adhesive tape on a printing sleeve, but because the PE laminating film is not high in tensile strength, repeated tearing in the plate changing process of a printing plate easily causes size deformation of the adhesive tape in the XY direction under the requirement of repeated use of the adhesive tape, and the adhesive tape is poor in reusability and even cannot be reused.

The single-side PET film reinforcing structure greatly improves the dimensional stability of the foam base material in the XY direction, but because the sleeve bonding surface is not provided with any auxiliary reinforcing layer, the foam is easily damaged when the adhesive tape is detached in the using process, and the production efficiency is influenced. In order to avoid such damage, the adhesive strength of the adhesive tape adhering to the sleeve surface cannot be too high, and therefore, during the repeated use of the adhesive tape, the printing plate is repeatedly disassembled, and the adhesive tape is wholly or partially taken up from the sleeve or moved and dislocated during the plate replacement, which affects the reusability and the production efficiency of the adhesive tape.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's weak point, provide a flexography is with pasting version bubble celloidin area, solved the sticky tape and warp at used repeatedly in-process size, taken, various harmfulness and defects such as dislocation, very big improvement used repeatedly's stability, be favorable to production efficiency's further promotion.

The utility model provides a technical scheme that technical problem adopted is:

the utility model provides a flexographic printing is with pasting version bubble cotton tape, is including the release layer of laminating in proper order, first pressure sensitive adhesive layer, PET enhancement layer, second pressure sensitive adhesive layer, the cotton layer of bubble, PE enhancement layer and third pressure sensitive adhesive layer.

Further, the thickness of the PET reinforcing layer is 0.010-0.035 mm. Preferably 0.015 to 0.030mm, most preferably 0.020 to 0.025 mm.

Furthermore, the PE enhancement layer is covered on the foam layer by adopting a laminating process.

Further, the thickness of the PE reinforcing layer is 0.010-0.040 mm. Preferably 0.015-0.035 mm, most preferably 0.020-0.030 mm.

Furthermore, the release layer is a PET composite film or a PP film, and the thickness of the release layer is 0.05mm-0.2 mm. Preferably 0.100 to 0.150 mm.

Further, the first pressure-sensitive adhesive layer, the second pressure-sensitive adhesive layer and the third pressure-sensitive adhesive layer are rubber pressure-sensitive adhesives and acrylic pressure-sensitive adhesives.

Further, the thickness of the first pressure-sensitive adhesive layer is 0.010-0.050 mm, the thickness of the second pressure-sensitive adhesive layer is 0.010-0.050 mm, and the thickness of the third pressure-sensitive adhesive layer is 0.020-0.060 mm.

Furthermore, the foam layer is a PE, PU, PVC or PO closed-cell foam material which is crosslinked in a chemical or physical mode, and the thickness of the foam layer is 0.20-0.55 mm.

The utility model has the advantages that:

the utility model discloses a two-sided reinforcing structure of new PET PE had both avoided two PE structures at the dimensional stability defect of XY direction, because the existence of sleeve bonding face PE reinforcing film, can further improve sleeve bonding face adhesion strength simultaneously, and then can let the cotton sticky tape of bubble that takes this structure as the basis obtain great promotion on operability and reusability.

Drawings

FIG. 1 is a schematic structural view of the adhesive tape of the present invention;

FIG. 2 is a production flow chart of the adhesive tape of the present invention;

fig. 3 is a comparison graph of the peeling force of the single-sided PET reinforced foam of the present invention under the 90 degree test.

Detailed Description

The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.

The utility model provides a flexographic printing is with pasting version bubble cotton tape, is including laminating in proper order from type layer 1, first pressure sensitive adhesive layer 2, PET enhancement layer 3, second pressure sensitive adhesive layer 4, the cotton layer 5 of bubble, PE enhancement layer 6 and third pressure sensitive adhesive layer 7.

The release layer 1 is a PET composite film or a PP film, and the thickness range is 0.05mm-0.2 mm. Preferably 0.100 to 0.150 mm.

The first pressure-sensitive adhesive layer 2, the second pressure-sensitive adhesive layer 4 and the third pressure-sensitive adhesive layer 7 can be rubber pressure-sensitive adhesive and acrylic pressure-sensitive adhesive, and preferably acrylic esters.

Further, the thickness of the first pressure sensitive adhesive layer 2 is 0.010-0.050 mm, preferably 0.020-0.040 mm, and most preferably 0.025-0.035 mm. If the coating glue layer is too thin, the bonding strength of the printing plate cannot be ensured, so that the edge of the printing plate is warped before printing, during printing or in a certain link after printing, and the final printing effect or the repeated utilization rate of the adhesive tape cannot be expected; if the coating adhesive layer is too thick, the fluidity of the pressure sensitive adhesive layer causes the whole printing plate to shift and misplace under the influence of continuous pressure and temperature during the printing process, so that the final printing effect is not expected.

Further, the thickness of the second pressure sensitive adhesive layer 4 is 0.010-0.050 mm, preferably 0.020-0.040 mm, and most preferably 0.025-0.035 mm. If the coating of the adhesive layer is too thin, the bonding strength between PET and foam is not enough, and the PET and foam are easy to be partially or wholly layered in the subsequent process of disassembling and replacing the printing plate, so that the adhesive tape can not be reused; if the coating is too thick, the PET reinforcing layer can slide, be misplaced and even be poor in wrinkle similarly to the first pressure-sensitive adhesive layer 2, and further the final printing effect is poor.

Further, the thickness of the third pressure sensitive adhesive layer 7 is 0.020-0.060 mm, preferably 0.030-0.050 mm, and most preferably 0.035-0.045 mm.

The foam layer 5 is a closed-cell foam material such as PE, PU, PVC, PO and the like which is crosslinked in a chemical or physical mode, and the thickness of the foam material is 0.20-0.55 mm, preferably 0.25-0.50 mm, and most preferably 0.30-0.45 mm.

The thickness of the PET enhancement layer 3 is 0.010-0.035 mm, preferably 0.015-0.030 mm, and most preferably 0.020-0.025 mm. If the thickness of the selected PET reinforcing layer is too thin, the dimensional stability of the adhesive tape in the XY direction is not improved enough, the adhesive tape is easy to deform in the process of repeatedly disassembling the printing plate, and the adhesive tape cannot be used continuously; if the thickness of PET is too thick, the whole hardness of the adhesive tape is hard, so that the final printing effect reaches the standard.

The PE enhancement layer 6 is coated on the foam layer 5 by adopting a film coating process, and the thickness of the PE enhancement layer 6 is 0.010-0.040 mm, preferably 0.015-0.035 mm, and most preferably 0.020-0.030 mm. If the PE film coating layer is too thin, the enhancement effect on the foam can not be achieved; if the laminating layer is too thick, the rebound effect of the foam can be influenced, and the final printed image-text is poor.

The manufacturing process of the adhesive tape of the utility model is shown in figure 2:

firstly, a foam layer 5 is coated with a PE (polyethylene) enhancement layer 6 in advance to form a single-sided PE enhanced composite structure;

coating a second pressure-sensitive adhesive layer 4 on the PET enhancement layer 3, drying, and attaching the dried PET enhancement layer to the composite foam structure prepared in the first plasma treatment step to form a PET/PE double-sided enhancement structure;

coating a first pressure-sensitive adhesive layer 2 on the release layer 1, drying, and attaching the release layer to the PET reinforced surface of the composite structure obtained in the second step after plasma treatment;

and step four, coating a third pressure-sensitive adhesive layer 7 on the auxiliary release layer, drying, attaching the auxiliary release layer to the PE reinforced surface of the composite structure in the step three, recovering the auxiliary release layer, and rewinding and rolling the rest parts.

The utility model discloses the use method of sticky tape does:

firstly, the third pressure-sensitive adhesive layer 7 is pasted on the printing sleeve, then the release layer 1 is torn off, and finally the printing plate is pasted on the first pressure-sensitive adhesive layer 2.

Contrast PET single face reinforcing structure, as shown in fig. 3, this application PET PE two-sided reinforcing structure is guaranteeing to steep under the cotton not damaged prerequisite, is showing the bonding strength who has promoted the sleeve face of bonding, has solved the sticky tape from this and has out of shape at used repeatedly in-process size, takes, various harmfulness and defects such as dislocation, very big improvement used repeatedly's stability, be favorable to production efficiency's further promotion. If a double-sided PET reinforcing structure is adopted, the overall hardness of the final adhesive tape is too high, the hardness requirement of most flexible printing processes on the plate-attaching adhesive tape cannot be met, the conformability of the sleeve surface is not as good as that of the PE reinforcing structure, and wrinkles are easy to appear when the sleeve surface is covered with the sleeve.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the spirit of the present invention, and these modifications and improvements are all within the protection scope of the present invention.

Claims (7)

1. The utility model provides a flexographic printing is with pasting cotton sticky tape of version bubble which characterized in that: including laminating in proper order from type layer (1), first pressure sensitive adhesive layer (2), PET enhancement layer (3), second pressure sensitive adhesive layer (4), bubble cotton layer (5), PE enhancement layer (6) and third pressure sensitive adhesive layer (7).

2. The pasting foam tape for flexographic printing according to claim 1, characterized in that: the thickness of the PET enhancement layer (3) is 0.010-0.035 mm.

3. The pasting foam tape for flexographic printing according to claim 1, characterized in that: the PE enhancement layer (6) is covered on the foam layer (5) by adopting a laminating process.

4. The pasting foam tape for flexographic printing according to claim 1, characterized in that: the thickness of the PE reinforcing layer (6) is 0.010-0.040 mm.

5. The pasting foam tape for flexographic printing according to claim 1, characterized in that: the release layer (1) is a PET composite film or a PP film, and the thickness is 0.05mm-0.2 mm.

6. The pasting foam tape for flexographic printing according to claim 1, characterized in that: the thickness of the first pressure-sensitive adhesive layer (2) is 0.010-0.050 mm, the thickness of the second pressure-sensitive adhesive layer (4) is 0.010-0.050 mm, and the thickness of the third pressure-sensitive adhesive layer (7) is 0.020-0.060 mm.

7. The pasting foam tape for flexographic printing according to claim 1, characterized in that: the foam layer (5) is a PE, PU, PVC or PO closed-cell foam material which is crosslinked in a chemical or physical mode, and the thickness of the foam layer is 0.20-0.55 mm.

Images