Method for recycling adhesive tape

Abstract

The application discloses a method for recycling and reusing adhesive tape, and relates to the technical field of adhesive tape, and comprises the following steps: step S1, preparation of glue for regenerated adhesive tape; step S2, preparation of glue solution for easy-to-pull adhesive tape by adding rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone; and step S3, forming of the easy-to-pull adhesive tape. The method can safely and quickly recycle and reuse rubber type easy-to-pull adhesive tape, has high recycling rate, and the prepared easy-to-pull adhesive tape has sufficient adhesion, no residual glue after removal, and good tensile property and weather resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of adhesive tape, in particular to a method for recycling adhesive tape. BACKGROUND

[0002] With the rapid development of the adhesive field, rubber type easy-to-pull adhesive tape has been widely used in 3C, home furnishing and other industries. When used, it will be die-cut into a specific shape, and the material left after die-cutting will be discarded; the easy-to-pull adhesive used in the process will also be discarded; and because the rubber-based easy-to-pull adhesive tape has good adsorption to release material, the silicone oil on the release material is easy to transfer to the adhesive tape, causing the adhesive tape to have reduced contamination performance, and low-performance easy-to-pull adhesive tapes on the market will be discarded. In the production process of easy-to-pull adhesive tape, there will also be scrap of semi-finished products or waste of edge material produced during slitting. These all cause great waste of resources, and their random disposal will also cause environmental problems. Therefore, it is necessary to seek effective methods for recycling these adhesive tapes.

[0003] At present, there are few methods for recycling rubber type easy-to-pull adhesive tape, and the few methods that are still in the research and development experimental stage also have technical defects such as insufficient adhesion, low recycling rate, residual glue during removal, and further improved tensile performance and weather resistance.

[0004] A TPU substrate easy-to-pull removable double-sided adhesive tape is disclosed in Chinese patent CN109575826B, which comprises the following components and mass fractions: rubber raw material 80-150 parts, tackifying resin 75-130 parts, toluene 100-350 parts, adhesion promoter 0.1-5 parts, and color paste 5-15 parts. The TPU substrate adhesive tape is a double-sided fixed adhesive tape with high bonding strength, which can be used after peeling off the release film or after the release film is attached. When removal is needed, it can be removed by stretching the adhesive tape, which can greatly facilitate the work of workers during the maintenance and repair of electronic components. However, the weather resistance of the easy-to-pull adhesive tape needs to be further improved, and the cost needs to be further reduced.

[0005] Therefore, it is necessary to seek more effective methods for recycling adhesive tape, and to prepare easy-to-pull adhesive tape with sufficient adhesion, no residual glue during removal, good tensile performance and weather resistance, which meets the market demand and has wide market value and application prospect, and has very important significance for promoting the development of the field of easy-to-pull adhesive tape. SUMMARY

[0006] The main purpose of the present application is to provide a method for recycling rubber type easy-to-pull adhesive tape safely and quickly, which has high recycling rate, and the prepared easy-to-pull adhesive tape has sufficient adhesion, no residual glue during removal, good tensile performance and weather resistance.

[0007] To achieve the above object, the present application provides a method for recycling adhesive tape, comprising the following steps:

[0008] Step S1, preparation of glue for regenerated adhesive tape: recycle waste rubber type adhesive tape, peel off the release material, agglomerate into a lump-shaped recycled glue, put it into a barrel, then add solvent, antioxidant and tackifier in turn, place it in an environment of 40-60℃ for 20-30 hours, then stir under the assistance of multi-energy field until the raw materials are uniformly dispersed, filter and degas, to obtain glue for regenerated adhesive tape;

[0009] Step S2, preparation of glue solution for easy-to-pull adhesive tape: add rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorobenzophenone in turn in the glue for regenerated adhesive tape, mix uniformly, then filter and degas again, to obtain glue solution for easy-to-pull adhesive tape;

[0010] Step S3, molding of easy-to-pull adhesive tape: evenly coat the glue solution for easy-to-pull adhesive tape prepared in step S2 on a release film, dry to obtain easy-to-pull adhesive tape with a glue layer thickness of 50-500µm.

[0011] Preferably, the solvent in step S1 is any one of ethyl acetate, butanone or toluene.

[0012] Preferably, the antioxidant in step S1 is at least one of antioxidant 1010, antioxidant 168 or antioxidant 1076.

[0013] Preferably, the tackifier in step S1 is at least one of hydrogenated rosin resin or terpene resin.

[0014] Preferably, the mass ratio of lump-shaped recycled glue, solvent, antioxidant and tackifier in step S1 is 1:(2-3):(0.01-0.03):(0.03-0.05).

[0015] Preferably, the multi-energy field assistance in step S1 includes ultrasonic treatment and microwave treatment; the ultrasonic frequency of the ultrasonic treatment is 45-55kHz, the treatment power is 800-1000W, and the treatment time is 10-16min; the microwave frequency of the microwave treatment is 1.8-2.5GHz, the treatment power is 1000-1500W, and the treatment time is 10-15min.

[0016] Preferably, the mass ratio of glue for regenerated adhesive tape, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorobenzophenone in step S2 is 1:(0.15-0.25):(0.01-0.03):(0.03-0.05).

[0017] Preferably, there are no special requirements for the source of the rosin-based hyperbranched epoxy resin. In one embodiment of the present invention, the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 in the authorized announcement number CN106519188B.

[0018] Preferably, the thickness of the release film in step S3 is 25-150 μm.

[0019] Preferably, the release film in step S3 is a double-sided release film.

[0020] Another object of the present invention is to provide an easy-pull tape made using the above-described tape recycling method.

[0021] Due to the application of the above technical solution, the present invention has the following beneficial effects:

[0022] (1) The method for recycling and reusing tape disclosed in this invention can safely and quickly recycle and reuse rubber-type easy-pull tape with a high recycling rate; the process is simple, easy to operate, has little dependence on equipment, and is suitable for continuous large-scale production.

[0023] (2) The tape recycling and reuse method disclosed in this invention uses recycled waste rubber-type tape as the main raw material to produce recycled easy-pull tape. This method is a waste recycling and reuse method, which turns waste into treasure. It not only avoids the waste of resources, but also helps environmental protection and reduces product production costs. Using multi-energy field assisted preparation of adhesive for recycled tape can improve production efficiency and recycling rate.

[0024] (3) The method for recycling and reusing adhesive tape disclosed in this invention involves adding rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine, and 3,3'-diamino-4,4'-difluorodiphenyl sulfone to the adhesive for recycled adhesive tape. The epoxy groups in the rosin hyperbranched epoxy resin molecule can undergo an epoxy ring-opening reaction with the amino-containing raw materials such as bicyclo[2.2.1]heptanedimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone to form an interpenetrating network structure. At the same time, the introduced rosin-based, bicyclo[2.2.1]heptyl, and difluorodiphenyl sulfone structural groups, under the multiple effects of electronic effects, steric hindrance effects, and electronic effects, make the produced easy-pull adhesive tape have sufficient performance, leave no residue after removal, and have good tensile properties and weather resistance. Detailed Implementation

[0025] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0026] In the embodiments of the present invention, the recycled waste rubber-type tape is recycled waste tesa® 67215 Bond & Detach tape. Example 1

[0027] A method for recycling and reusing adhesive tape includes the following steps:

[0028] Step S1: Preparation of adhesive for recycled tape: Recycle waste rubber tape, peel off the release material, agglomerate the recycled adhesive into clumps, put it into a bucket, and then add solvent, antioxidant and tackifier in sequence. After placing it in an environment of 40°C for 20 hours, stir it under the assistance of a multi-energy field until the raw materials are evenly dispersed, and then filter and degas to obtain adhesive for recycled tape.

[0029] Step S2, Preparation of adhesive solution for easy-pull tape: Rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are added sequentially to the recycled tape adhesive solution. After mixing evenly, the mixture is filtered and degassed again to obtain the adhesive solution for easy-pull tape.

[0030] Step S3, forming of easy-open tape: The easy-open tape made in step S2 is evenly coated onto the release film with adhesive liquid, and after drying, an easy-open tape with an adhesive layer thickness of 100µm is obtained.

[0031] The solvent in step S1 is ethyl acetate; the antioxidant in step S1 is antioxidant 1010; the tackifier is hydrogenated rosin resin; the mass ratio of the clump-like recycled adhesive, solvent, antioxidant, and tackifier in step S1 is 1:2:0.01:0.03; the multi-energy field assistance in step S1 includes ultrasonic treatment and microwave treatment; the ultrasonic treatment has an ultrasonic frequency of 45kHz, a processing power of 800W, and a processing time of 10min; the microwave treatment has a microwave frequency of 1.8GHz, a processing power of 1000W, and a processing time of 10min.

[0032] In step S2, the mass ratio of the recycled tape adhesive, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine, and 3,3'-diamino-4,4'-difluorodiphenyl sulfone is 1:0.15:0.01:0.03; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 in the authorized announcement number CN106519188B; the thickness of the release film in step S3 is 25 μm; the release film in step S3 is a double-sided release film.

[0033] An easy-pull tape made using the above-mentioned tape recycling and reuse method. Example 2

[0034] A method for recycling and reusing adhesive tape includes the following steps:

[0035] Step S1: Preparation of adhesive for recycled tape: Recycle waste rubber tape, peel off the release material, agglomerate the recycled adhesive into clumps, put it into a bucket, and then add solvent, antioxidant and tackifier in sequence. After placing it in an environment of 45°C for 23 hours, stir it under the assistance of a multi-energy field until the raw materials are evenly dispersed, and then filter and degas to obtain adhesive for recycled tape.

[0036] Step S2, Preparation of adhesive solution for easy-pull tape: Rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are added sequentially to the recycled tape adhesive solution. After mixing evenly, the mixture is filtered and degassed again to obtain the adhesive solution for easy-pull tape.

[0037] Step S3, forming of easy-open tape: The easy-open tape made in step S2 is evenly coated onto the release film with adhesive liquid, and after drying, an easy-open tape with an adhesive layer thickness of 100µm is obtained.

[0038] The solvent in step S1 is methyl ethyl ketone (MEK); the antioxidant in step S1 is antioxidant 168; the tackifier in step S1 is a terpene resin; the mass ratio of the clump-like recycled adhesive, solvent, antioxidant, and tackifier in step S1 is 1:2.2:0.015:0.035; the multi-energy field assistance in step S1 includes ultrasonic treatment and microwave treatment; the ultrasonic treatment has an ultrasonic frequency of 48 kHz, a processing power of 850 W, and a processing time of 12 min; the microwave treatment has a microwave frequency of 2 GHz, a processing power of 1200 W, and a processing time of 12 min.

[0039] In step S2, the mass ratio of the recycled tape adhesive, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine, and 3,3'-diamino-4,4'-difluorodiphenyl sulfone is 1:0.18:0.015:0.035; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 in the authorized announcement number CN106519188B; the thickness of the release film in step S3 is 60 μm; the release film in step S3 is a double-sided release film.

[0040] An easy-pull tape made using the above-mentioned tape recycling and reuse method. Example 3

[0041] A method for recycling and reusing adhesive tape includes the following steps:

[0042] Step S1: Preparation of adhesive for recycled tape: Recycle waste rubber tape, peel off the release material, agglomerate the recycled adhesive into clumps, put it into a bucket, and then add solvent, antioxidant and tackifier in sequence. After placing it in an environment of 50°C for 25 hours, stir it under the assistance of a multi-energy field until the raw materials are evenly dispersed, and then filter and degas to obtain adhesive for recycled tape.

[0043] Step S2, Preparation of adhesive solution for easy-pull tape: Rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are added sequentially to the recycled tape adhesive solution. After mixing evenly, the mixture is filtered and degassed again to obtain the adhesive solution for easy-pull tape.

[0044] Step S3, forming of easy-open tape: The easy-open tape made in step S2 is evenly coated onto the release film with adhesive liquid, and after drying, an easy-open tape with an adhesive layer thickness of 100µm is obtained.

[0045] The solvent in step S1 is toluene; the antioxidant in step S1 is antioxidant 1076; the tackifier in step S1 is hydrogenated rosin resin; the mass ratio of the clump-shaped recycled adhesive, solvent, antioxidant, and tackifier in step S1 is 1:2.5:0.02:0.04; the multi-energy field assistance in step S1 includes ultrasonic treatment and microwave treatment; the ultrasonic treatment has an ultrasonic frequency of 50kHz, a processing power of 900W, and a processing time of 13min; the microwave treatment has a microwave frequency of 2.2GHz, a processing power of 1300W, and a processing time of 13min.

[0046] In step S2, the mass ratio of the recycled tape adhesive, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine, and 3,3'-diamino-4,4'-difluorodiphenyl sulfone is 1:0.2:0.02:0.04; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 in the authorized announcement number CN106519188B; the thickness of the release film in step S3 is 90 μm; the release film in step S3 is a double-sided release film.

[0047] An easy-pull tape made using the above-mentioned tape recycling and reuse method. Example 4

[0048] A method for recycling and reusing adhesive tape includes the following steps:

[0049] Step S1: Preparation of adhesive for recycled tape: Recycle waste rubber tape, peel off the release material, agglomerate the recycled tape into clumps, put it into a bucket, and then add solvent, antioxidant and tackifier in sequence. After placing it in an environment of 55°C for 28 hours, stir it under the assistance of a multi-energy field until the raw materials are evenly dispersed, and then filter and degas to obtain adhesive for recycled tape.

[0050] Step S2, Preparation of adhesive solution for easy-pull tape: Rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are added sequentially to the recycled tape adhesive solution. After mixing evenly, the mixture is filtered and degassed again to obtain the adhesive solution for easy-pull tape.

[0051] Step S3, forming of easy-open tape: The easy-open tape made in step S2 is evenly coated onto the release film with adhesive liquid, and after drying, an easy-open tape with an adhesive layer thickness of 100µm is obtained.

[0052] The solvent in step S1 is ethyl acetate; the antioxidant in step S1 is a mixture of antioxidant 1010, antioxidant 168, and antioxidant 1076 in a mass ratio of 1:2:3; the tackifier in step S1 is a mixture of hydrogenated rosin resin and terpene resin in a mass ratio of 3:5; the mass ratio of the clump-like recycled adhesive, solvent, antioxidant, and tackifier in step S1 is 1:2.8:0.025:0.045; the multi-energy field assistance in step S1 includes ultrasonic treatment and microwave treatment; the ultrasonic treatment has an ultrasonic frequency of 53 kHz, a processing power of 950 W, and a processing time of 14 min; the microwave treatment has a microwave frequency of 2.3 GHz, a processing power of 1400 W, and a processing time of 14 min.

[0053] In step S2, the mass ratio of the recycled tape adhesive, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine, and 3,3'-diamino-4,4'-difluorodiphenyl sulfone is 1:0.23:0.025:0.045; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 in the authorized announcement number CN106519188B; the thickness of the release film in step S3 is 130 μm; the release film in step S3 is a double-sided release film.

[0054] An easy-pull tape made using the above-mentioned tape recycling and reuse method. Example 5

[0055] A method for recycling and reusing adhesive tape includes the following steps:

[0056] Step S1: Preparation of adhesive for recycled tape: Recycle waste rubber tape, peel off the release material, agglomerate the recycled tape into clumps, put it into a bucket, and then add solvent, antioxidant and tackifier in sequence. After placing it in an environment of 60°C for 30 hours, stir it under the assistance of a multi-energy field until the raw materials are evenly dispersed, and then filter and degas to obtain adhesive for recycled tape.

[0057] Step S2, Preparation of adhesive solution for easy-pull tape: Rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptane dimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are added sequentially to the recycled tape adhesive solution. After mixing evenly, the mixture is filtered and degassed again to obtain the adhesive solution for easy-pull tape.

[0058] Step S3, forming of easy-open tape: The easy-open tape made in step S2 is evenly coated onto the release film with adhesive liquid, and after drying, an easy-open tape with an adhesive layer thickness of 100µm is obtained.

[0059] The solvent in step S1 is ethyl acetate; the antioxidant in step S1 is antioxidant 1010; the tackifier in step S1 is hydrogenated rosin resin; the mass ratio of the clump-like recycled adhesive, solvent, antioxidant, and tackifier in step S1 is 1:3:0.03:0.05; the multi-energy field assistance in step S1 includes ultrasonic treatment and microwave treatment; the ultrasonic treatment has an ultrasonic frequency of 55 kHz, a processing power of 1000 W, and a processing time of 16 min; the microwave treatment has a microwave frequency of 2.5 GHz, a processing power of 1500 W, and a processing time of 15 min.

[0060] In step S2, the mass ratio of the recycled tape adhesive, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine, and 3,3'-diamino-4,4'-difluorodiphenyl sulfone is 1:0.25:0.03:0.05; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 in the authorized announcement number CN106519188B; the thickness of the release film in step S3 is 150 μm; the release film in step S3 is a double-sided release film.

[0061] An easy-pull tape made using the above-mentioned tape recycling and reuse method.

[0062] Comparative Example 1

[0063] A method for recycling and reusing adhesive tape is basically the same as that in Example 1, except that bicyclo[2.2.1]heptanedimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are not added.

[0064] Comparative Example 2

[0065] A method for recycling and reusing adhesive tape is basically the same as that in Example 1, except that rosin-based hyperbranched epoxy resin is not added.

[0066] To further illustrate the beneficial technical effects of the tape recycling and reuse methods involved in the various embodiments of the present invention, relevant performance tests were conducted on the easy-pull tapes prepared using the tape recycling and reuse methods involved in Examples 1-5 and Comparative Examples 1-2. The test results are shown in Table 1. The test methods are as follows: the curing temperature of each example was 110℃, the curing time was 5min, and the 180-degree peel strength against SUS steel plate was tested according to GB / T2792-2014. The tensile strength of the tape was tested using a tensile testing machine at 23±2℃. After curing, the test was conducted with a strip width of 15mm, a clamp spacing of 20mm, and a tensile speed of 300mm / min. The residual adhesive of the tape adhered to the stainless steel plate was tested using a vacuum oven (100℃, 3 minutes). Each sample was placed in a constant temperature and humidity test chamber at 85℃*90%RH for 200h. After cooling to room temperature, the 180-degree peel strength against SUS steel plate was tested again, and the peel strength retention rate was calculated. The higher the value, the better the weather resistance.

[0067] Table 1

[0068] Item Tensile strength Adhesive residue Peeling strength Weather resistance Unit MPa — N / cm % Example 1 27.3 None 20.1 98.2 Example 2 28.0 None 20.5 98.7 Example 3 28.5 None 20.7 99.0 Example 4 29.4 None 21.2 99.6 Example 5 30.0 None 21.4 99.9 Comparative Example 1 24.5 Yes 19.6 95.8 Comparative Example 2 22.4 Yes 16.8 97.7

[0069] As can be seen from Table 1, the easy-pull tapes made by the tape recycling and reuse methods disclosed in the embodiments of the present invention have better bonding performance, tensile performance and weather resistance than the comparative product, and there is no residue; the addition of bicyclo[2.2.1]heptanedimethylamine, 3,3'-diamino-4,4'-difluorodiphenyl sulfone and rosin-based hyperbranched epoxy resin is beneficial to improving the above properties.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A method for recycling and reusing adhesive tape, characterized in that, Includes the following steps: Step S1: Preparation of adhesive for recycled tape: Waste rubber-type adhesive tape is recycled, the release material is peeled off, and the tape is agglomerated into clumps. These clumps are then placed in a container, and solvent, antioxidant, and tackifier are added sequentially. After being placed in an environment of 40-60℃ for 20-30 hours, the mixture is stirred under multi-energy field assistance until the raw materials are evenly dispersed. The mixture is then filtered and degassed to obtain the adhesive for recycled tape. The multi-energy field assistance includes ultrasonic treatment and microwave treatment. The ultrasonic treatment has an ultrasonic frequency of 45-55kHz, a processing power of 800-1000W, and a processing time of 10-16 minutes. The microwave treatment has a microwave frequency of 1.8-2.5GHz, a processing power of 1000-1500W, and a processing time of 10-15 minutes. Step S2, Preparation of adhesive solution for easy-pull tape: Rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone are added sequentially to the recycled tape adhesive solution. After mixing evenly, the mixture is filtered and degassed again to obtain the adhesive solution for easy-pull tape. The mass ratio of the recycled tape adhesive solution, rosin-based hyperbranched epoxy resin, bicyclo[2.2.1]heptanedimethylamine and 3,3'-diamino-4,4'-difluorodiphenyl sulfone is 1:(0.15-0.25):(0.01-0.03):(0.03-0.05). Step S3, forming of easy-open tape: The easy-open tape made in step S2 is evenly coated onto the release film with adhesive liquid, and after drying, an easy-open tape with an adhesive layer thickness of 50-500µm is obtained.

2. The method for recycling and reusing adhesive tape according to claim 1, characterized in that, The solvent mentioned in step S1 is any one of ethyl acetate, butanone, and toluene.

3. The method for recycling and reusing adhesive tape according to claim 1, characterized in that, The antioxidant mentioned in step S1 is at least one of antioxidant 1010, antioxidant 168, and antioxidant 1076.

4. The method for recycling and reusing adhesive tape according to claim 1, characterized in that, The tackifier mentioned in step S1 is at least one of hydrogenated rosin resin and terpene resin.

5. The method for recycling and reusing adhesive tape according to claim 1, characterized in that, The mass ratio of the clump-shaped recycled adhesive, solvent, antioxidant, and tackifier in step S1 is 1:(2-3):(0.01-0.03):(0.03-0.05).

6. The method for recycling and reusing adhesive tape according to claim 1, characterized in that, The thickness of the release film in step S3 is 25-150 μm.

7. The method for recycling and reusing adhesive tape according to claim 1, characterized in that, The release film mentioned in step S3 is a double-sided release film.

8. An easy-pull adhesive tape, characterized in that, It is made by the method of recycling and reusing the tape as described in any one of claims 1-7.