Super strong tensile property easy-pull adhesive tape

Abstract

The application discloses a super tensile easy-to-pull adhesive tape, which comprises a TPU film layer, a tensile adhesive layer coated in a corrugated shape on the surface of the TPU film layer, a first adhesive layer filled in the vacancy of the tensile adhesive layer and coated on the surface of the TPU film layer, and a second adhesive layer containing an antistatic additive and coated on the outer side of the first adhesive layer. The application realizes the easy-to-pull adhesive tape with super tensile performance.

Description

Technical Field

[0001] This invention belongs to the field of tape technology, and in particular relates to an easy-pull tape with ultra-high tensile strength. Background Technology

[0002] With the rapid development of electronic and communication technologies, smartphones, tablets, and other electronic products have become an indispensable part of people's work and life. Easy-pull tape can firmly bond the battery to the motherboard in a direction perpendicular to the bonding interface. However, in a direction parallel to the bonding interface, the tape can be easily pulled out using the pre-designed pull handle, leaving no adhesive residue. The reason for this characteristic is that the adhesive used in easy-pull tape is primarily composed of natural or synthetic rubber, containing both soft and hard segments. The soft segments act as a continuous phase, providing flexibility, while the hard segments act as a dispersed phase, providing connection points for the continuous phase. This molecular structure generally does not break. However, due to the aging of the tape, it can still break under significant tensile force, causing difficulties in subsequent cleaning. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned technical problems and provide an easy-pull tape with superior tensile strength, thereby achieving an easy-pull tape with superior tensile strength. To achieve the above objective, the technical solution of this invention is as follows: A high-strength, easy-pull tape includes a TPU film layer, a tensile adhesive layer coated in a corrugated pattern along the surface of the TPU film layer, a first adhesive layer filling the voids in the tensile adhesive layer and coated on the surface of the TPU film layer, and a second adhesive layer containing an antistatic additive coated on the outer side of the first adhesive layer.

[0004] Specifically, the tensile adhesive layer comprises the following components in parts by weight: 20-30 parts of styrene-butadiene-styrene block copolymer rubber elastomer, 20-30 parts of styrene-isoprene-styrene block copolymer rubber elastomer, 30-40 parts of tackifying resin, and 13-14 parts of reinforcing fiber.

[0005] Specifically, the reinforcing fiber is either carbon fiber or sepiolite fiber.

[0006] Specifically, the first adhesive layer comprises the following components in parts by weight: 20-30 parts of EVA elastomer, 10-15 parts of tackifying resin, and 1-2 parts of curing agent.

[0007] Specifically, the second adhesive layer comprises the following components in parts by weight: 20-30 parts epoxy rubber, 10-15 parts tackifying resin, and 0.05-0.15 parts antistatic additive.

[0008] Specifically, the tackifying resin includes any one of rosin resin, terpene resin, and C9 petroleum resin.

[0009] Specifically, the softening temperature range of the tackifying resin is 50℃-130℃.

[0010] Specifically, the content of vinyl acetate units in the EVA elastomer is 45-55 wt%.

[0011] Compared with existing technologies, the beneficial effects of this invention's high-strength, easy-pull tape are mainly reflected in: By setting a corrugated tensile adhesive layer on the TPU film, its corrugated structure can effectively deform and prevent breakage during stretching; the reinforcing fibers of the tensile adhesive layer are added to the rubber elastomer, which can effectively increase the tensile strength of the tensile adhesive layer; the first and second adhesive layers have good heat resistance and no residue problem when the tape is torn off; the addition of antistatic additives to the second adhesive layer gives the tape additional antistatic properties and improves the safety performance of the tape. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention; Figure 2 This is a top view of the tensile adhesive layer in this embodiment. The numbers in the image represent: 1. TPU film layer, 2. Tensile adhesive layer, 3. First adhesive layer, 4. Second adhesive layer. Detailed Implementation

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] Example 1: Reference Figure 1-2 As shown, this embodiment is an easy-pull tape with super tensile strength, including a TPU film layer 1, a tensile adhesive layer 2 coated in a corrugated pattern along the surface of the TPU film layer 1, a first adhesive layer 3 filling the voids of the tensile adhesive layer 2 and coated on the surface of the TPU film layer 1, and a second adhesive layer 4 containing antistatic additives coated on the outside of the first adhesive layer 3.

[0015] The tensile adhesive layer 2 comprises the following components in parts by weight: 20 parts of styrene-butadiene-styrene block copolymer rubber elastomer, 30 parts of styrene-isoprene-styrene block copolymer rubber elastomer, 30 parts of tackifying resin, and 14 parts of reinforcing fiber.

[0016] The tensile adhesive layer 2 is applied to the surface of the TPU film layer 1 by extrusion coating according to the trajectory coordinates.

[0017] The reinforcing fiber is either carbon fiber or sepiolite fiber.

[0018] The first adhesive layer 3 comprises the following components in parts by weight: 20 parts EVA elastomer, 15 parts tackifying resin, and 1 part curing agent. The content of vinyl acetate units in the EVA elastomer is 55 wt%. The weight-average molecular weight of the EVA elastomer is 8000-15000. The curing agent is an isocyanate-based curing agent.

[0019] The second adhesive layer 4 comprises the following components in parts by weight: 20 parts epoxy rubber, 15 parts tackifying resin, and 0.05 parts antistatic additive.

[0020] Tackifying resins include rosin resins. The softening temperature range of tackifying resins is 50℃-130℃.

[0021] The antistatic additive is selected from ionic liquids, preferably from bis(trifluoromethanesulfonyl)imide-trimethylpropyl quaternary ammonium salt.

[0022] Example 2: The difference from Example 1 is as follows: The tensile adhesive layer 2 comprises the following components in parts by weight: 30 parts of styrene-butadiene-styrene block copolymer rubber elastomer, 20 parts of styrene-isoprene-styrene block copolymer rubber elastomer, 40 parts of tackifying resin, and 13 parts of reinforcing fiber.

[0023] The first adhesive layer 3 comprises the following components in parts by weight: 30 parts EVA elastomer, 10 parts tackifying resin, and 2 parts curing agent. The content of vinyl acetate units in the EVA elastomer is 45 wt%.

[0024] The second adhesive layer 4 comprises the following components in parts by weight: 30 parts epoxy rubber, 10 parts tackifying resin, and 0.15 parts antistatic additive.

[0025] Tackifying resins include terpene resins.

[0026] Example 3: The difference from Example 1 is as follows: The tensile adhesive layer 2 comprises the following components in parts by weight: 15 parts of styrene-butadiene-styrene block copolymer rubber elastomer, 15 parts of styrene-isoprene-styrene block copolymer rubber elastomer, 35 parts of tackifying resin, and 13.5 parts of reinforcing fiber.

[0027] The first adhesive layer 3 comprises the following components in parts by weight: 25 parts EVA elastomer, 12 parts tackifying resin, and 1.5 parts curing agent. The content of vinyl acetate units in the EVA elastomer is 50 wt%.

[0028] The second adhesive layer 4 comprises the following components in parts by weight: 25 parts epoxy rubber, 13 parts tackifying resin, and 0.1 parts antistatic additive.

[0029] Tackifying resins include C9 petroleum resins.

[0030] When applying the above embodiments, by providing a corrugated tensile adhesive layer 2 on the TPU film layer 1, its corrugated structure can effectively deform and prevent breakage during stretching; the reinforcing fibers of the tensile adhesive layer 2 added to the rubber elastomer can effectively increase the deformation strength of the tensile adhesive layer; the first adhesive layer 3 and the second adhesive layer 4 have good heat resistance, and there is no residue problem when the tape is torn off; the second adhesive layer 4 contains antistatic additives, which gives the tape additional antistatic properties and improves the safety performance of the tape.

[0031] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A high-strength, easy-pull adhesive tape, characterized in that: It includes a TPU film layer, a tensile adhesive layer coated in a corrugated pattern along the surface of the TPU film layer, a first adhesive layer that fills the voids of the tensile adhesive layer and is coated on the surface of the TPU film layer, and a second adhesive layer containing antistatic additives coated on the outside of the first adhesive layer. The tensile adhesive layer comprises the following components in parts by weight: 20-30 parts of styrene-butadiene-styrene block copolymer rubber elastomer, 20-30 parts of styrene-isoprene-styrene block copolymer rubber elastomer, 30-40 parts of tackifying resin, and 13-14 parts of reinforcing fiber; wherein the reinforcing fiber is one of carbon fiber or sepiolite fiber. The first adhesive layer comprises the following components in parts by weight: 20-30 parts of EVA elastomer, 10-15 parts of tackifying resin, and 1-2 parts of curing agent; The second adhesive layer comprises the following components in parts by weight: 20-30 parts epoxy rubber, 10-15 parts tackifying resin, and 0.05-0.15 parts antistatic additive; the softening temperature range of the tackifying resin is 50℃-130℃; and the content of vinyl acetate units in the EVA elastomer is 45-55 wt%.

Images