WO2017166116A1 - Structural adhesive tape and manufacturing method thereof - Google Patents

Structural adhesive tape and manufacturing method thereof Download PDF

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Publication number
WO2017166116A1
WO2017166116A1 PCT/CN2016/077843 CN2016077843W WO2017166116A1 WO 2017166116 A1 WO2017166116 A1 WO 2017166116A1 CN 2016077843 W CN2016077843 W CN 2016077843W WO 2017166116 A1 WO2017166116 A1 WO 2017166116A1
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WO
WIPO (PCT)
Prior art keywords
adhesive
adhesive layer
structural
structural adhesive
adhesive tape
Prior art date
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PCT/CN2016/077843
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French (fr)
Chinese (zh)
Inventor
戴志芳
龙海
陶兴华
张盛武
Original Assignee
宁德新能源科技有限公司
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Application filed by 宁德新能源科技有限公司 filed Critical 宁德新能源科技有限公司
Priority to PCT/CN2016/077843 priority Critical patent/WO2017166116A1/en
Publication of WO2017166116A1 publication Critical patent/WO2017166116A1/en

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    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • 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
    • C09J7/21—Paper; Textile fabrics

Definitions

  • the invention relates to the field of adhesive tape, in particular to a structural adhesive tape and a preparation method thereof.
  • the prior art adhesive tape generally uses a PET substrate and an acrylate-based pressure-sensitive adhesive plus a foaming agent to achieve foaming to peel off from the current collector to reserve a polar ear position on the current collector.
  • an acrylate-based pressure-sensitive adhesive plus a foaming agent to achieve foaming to peel off from the current collector to reserve a polar ear position on the current collector.
  • the foaming agent when the amount of residual solvent in the adhesive is too large (>10%), the foaming agent is completely coated in the adhesive, and even if the foaming agent expands after foaming, it is not effective. Reducing the contact area between the adhesive and the current collector makes the adhesive paper difficult to peel off, and it is impossible to reserve a polar ear position on the current collector.
  • the foaming agent itself generally has a wide particle size distribution (5 ⁇ m to 30 ⁇ m), it is easy to appear two failure modes by mixing and drying in an adhesive.
  • the adhesive layer is too thick, and the expansion and expansion of the foaming agent cannot effectively reduce the contact area between the adhesive and the current collector, resulting in excessive viscosity after foaming, which cannot be peeled off from the empty foil area of the current collector, resulting in Broken belt.
  • the adhesive layer is too thin, and the foaming agent is exposed outside the adhesive, which hinders the contact between the adhesive and the empty foil area of the current collector, resulting in weak viscosity after foaming, due to foaming of the foaming agent.
  • the coating When the coating is not completely dry, when the viscosity of the foaming agent is weak, it is easily brought up by the hot air and sticks to the wet film area. After the wet film is dried, the foaming agent is intensively inserted and cannot be peeled off normally, and the broken band is also caused. .
  • the thickness of the adhesive layer is usually required to be small, the precision of the conventional coating process cannot meet the requirements, and the thickness fluctuation causes a large amount of products to be scrapped.
  • an object of the present invention is to provide a structural adhesive tape and a method for preparing the same, wherein the foaming agent particles in the structural adhesive tape are viscous, and the adhesive of the structural adhesive paper and the object to be bonded
  • the consistency is extremely high, and it is easy to carry out batch production, and solves the problem that the viscosity of the foaming agent in the conventional adhesive paper is severely fluctuated after foaming.
  • Another object of the present invention is to provide a structural adhesive tape and a preparation method thereof, which can improve the utilization rate of the active material of the battery, avoid waste of the active material, and improve the energy density and fast-release performance of the battery. And heat dissipation.
  • the present invention provides a structural adhesive tape comprising: a first adhesive layer for bonding to an object to be bonded and comprising a first adhesive,
  • the surface of the first adhesive layer bonded to the object to be bonded is a first surface;
  • the substrate is located on a side of the structural adhesive tape away from the object to be bonded; and
  • the second adhesive layer is located at the first Between the adhesive layer and the substrate.
  • the second adhesive layer comprises: a second adhesive; and a blowing agent particle distributed on the second adhesive.
  • the surface of the second adhesive away from the substrate is a second surface, and part of the foaming agent particles are exposed on the second surface and embedded in the first adhesive layer, and the cross-sectional area of the partial foaming agent particles along the second surface
  • the sum of the sum is not less than 20% of the area of the second surface, and the sum of the cross-sectional areas of the partial blowing agent particles along the first surface is not more than 15% of the area of the first surface.
  • the invention provides a method for preparing a structural adhesive tape for preparing the structural adhesive tape according to one aspect of the invention, comprising the steps of: stirring a first adhesive and a first solvent; a slurry of the first adhesive layer; a second adhesive, a blowing agent particle and a second solvent are stirred to form a slurry of the second adhesive layer; and the slurry of the second adhesive layer is set On the substrate, heating to a first temperature for drying to remove the second solvent, the first temperature being lower than the foaming temperature of the blowing agent particles and ensuring distribution of the blowing agent particles to the second adhesive, second
  • the surface of the adhesive that is away from the substrate is the second surface and a portion of the blowing agent particles are exposed on the second surface, and the sum of the cross-sectional areas of the partial blowing agent particles along the second surface is not less than 20 of the area of the second surface.
  • the slurry of the first adhesive layer is disposed on the second adhesive layer, heated to a second temperature for drying to remove the first solvent and the remaining second solvent, the second temperature is lower than the hair Foaming temperature of the foaming agent particles, so that the first adhesive layer is bonded after being dried a surface of the first adhesive layer adhered to the object to be bonded is a first surface, the part of the foaming agent particles is embedded in the first adhesive layer, and the part of the foaming agent particles is along The sum of the cross-sectional areas of one surface is not more than 15% of the area of the first surface; heating to the third temperature and maintaining The preparation of the structural adhesive tape is completed by aging the first adhesive layer and the second adhesive layer for a period of time.
  • the structural adhesive tape of the invention has a double-layer adhesive structure, and after the foaming agent particles in the structural adhesive tape are foamed, the adhesiveness of the structural adhesive paper and the object to be bonded is extremely high, and the batch production is easy.
  • the problem that the viscosity of the foaming agent in the conventional adhesive tape is severe after foaming is solved.
  • FIG. 1 is a perspective view of a current collector of a bonded object to which a structural adhesive tape according to the present invention is applied;
  • Figure 2 is a perspective view of a structural adhesive tape adhered to a current collector of a bonded object according to the present invention
  • Figure 3 is a perspective view of a structural adhesive paper coated active material layer in accordance with the present invention.
  • Figure 4 is a perspective view of the structural adhesive tape after peeling according to the present invention.
  • Figure 5 is a perspective view of a structural adhesive tape according to the present invention.
  • Figure 6 is a front view of Figure 5;
  • Figure 7 is an exploded view of Figure 6;
  • FIG. 8A to 8B are schematic views of an embodiment of a prior art adhesive tape, wherein FIG. 8A shows a schematic view of the foaming agent before foaming, and FIG. 8B shows a schematic view of the foaming agent after foaming;
  • FIG. 9A to 9B are schematic views showing another embodiment of the prior art adhesive tape, wherein FIG. 9A shows a schematic view of the foaming agent before foaming, and FIG. 9B shows a schematic view of the foaming agent after foaming;
  • FIGS. 10A to 10B are schematic views showing still another embodiment of the prior art adhesive tape, wherein Fig. 10A shows a schematic view before foaming of the foaming agent, and Fig. 10B shows a schematic view after foaming of the foaming agent.
  • the structural adhesive tape 1 comprises: a first adhesive layer 11 for bonding to the object to be bonded and comprising the first adhesive 111.
  • a surface of the first adhesive layer 11 adhered to the object to be bonded is a first surface 11S; a substrate 12 on a side of the structural adhesive tape 1 away from the object to be bonded; and a second adhesive
  • the layer 13 is located between the first adhesive layer 11 and the substrate 12.
  • the second adhesive layer 13 includes: a second adhesive 131; and a blowing agent particle 132 distributed on the second adhesive 131.
  • the surface of the second adhesive 131 remote from the substrate 12 is the second surface 13S, and a portion of the blowing agent particles 132 are exposed on the second surface 13S and embedded in the first adhesive layer 11, the partial blowing agent particles 132.
  • the sum of the sectional areas along the second surface 13S is not less than 20% of the area of the second surface 13S, and the sum of the sectional areas of the partial blowing agent particles 132 along the first surface 11S is not greater than the area of the first surface 11S. 15%.
  • the blowing agent particles 132 are foamed so that the substrate 12 is curled toward the intermediate portion from the opposite side edges of the width direction W, and the portion is exposed to the foaming of the second surface 13S.
  • the agent particles 132 are foamed so that a portion of the first adhesive layer 11 corresponding to the position thereof is detached from the object to be bonded, and the remaining portion of the first adhesive layer 11 remains adhered to the object to be bonded.
  • the structural adhesive sheet 1 has a double-layer adhesive structure (i.e., the first adhesive layer 11 and the second adhesive layer 13), and the foaming agent particles 132 foam
  • the structural adhesive paper 1 has extremely high viscosity consistency with the object to be bonded, and is easy to be mass-produced, thereby solving the problem that the viscosity of the foaming agent in the conventional adhesive paper is severely fluctuated after foaming.
  • the total sectional area of the partial blowing agent particles 132 along the second surface 13S is not less than 50% of the area of the second surface 13S.
  • the total of the cross-sectional areas of the partial blowing agent particles 132 along the first surface 11S is zero. It is ensured that in the case where the blowing agent particles 132 are not foamed, the first adhesive layer 11 of the structural adhesive paper 1 is firmly bonded to the object to be bonded, and when the blowing agent particles 132 are foamed, the portion The blowing agent particles 132 exposed to the second surface 13S (i.e., the blowing agent particles located in the first adhesive layer 11) are foamed to break through the first adhesive layer 11, so that the first adhesive layer 11 One part (corresponding to the portion containing the blowing agent particles 132) is separated from the object to be bonded, and the other portion is kept from being bonded to the object to be bonded without being separated.
  • the materials of the first adhesive 111 and the second adhesive 131 may be the same or different.
  • the first adhesive 111 may be selected from one or more of an acrylate type adhesive and a urethane adhesive.
  • the second adhesive 131 may be selected from one or more of an acrylate type adhesive and a urethane adhesive.
  • the acrylate type adhesive may preferably be 2-methylethyl acrylate (EBN).
  • the first adhesive 111 and the second adhesive are different.
  • the adhesion between the first adhesive layer 11 and the object to be bonded is less than that of the first adhesive layer 11 and the second adhesive layer 13 and the second adhesive layer 13 and the substrate 12.
  • the first adhesive 111 may be selected from one or more of an acrylate type adhesive and a urethane adhesive.
  • the second adhesive 131 may be selected from one or more of an acrylate type adhesive and a urethane adhesive.
  • the acrylate type adhesive may preferably be 2-methylethyl acrylate (EBN).
  • the thickness of the first adhesive layer 11 is from 1 ⁇ m to 10 ⁇ m, preferably, the thickness of the first adhesive layer 11 is from 2 ⁇ m to 6 ⁇ m, further preferably The thickness of the first adhesive layer 11 is 3 ⁇ m to 4 ⁇ m.
  • the particle size of the blowing agent particles 132 is from 5 ⁇ m to 30 ⁇ m.
  • the blowing agent particles 132 are physical blowing agents and/or chemical blowing agents.
  • the physical foaming agent is an alkane long-chain series foaming agent.
  • the physical foaming agent is selected from the group consisting of isopentane foaming agent, isobutane foaming agent and cyclopentane foaming agent. Species Or several.
  • the chemical blowing agent is selected from the group consisting of azodicarbonamide (AC), azobisisobutyronitrile (AIBN), N,N-dinitrosopentamethylenetetramine (DPT), 4,4'- One or more of oxybisbenzenesulfonylhydrazide (OBSH) and p-toluenesulfonylhydrazide (TSH).
  • AC azodicarbonamide
  • AIBN azobisisobutyronitrile
  • DPT N,N-dinitrosopentamethylenetetramine
  • OBSH oxybisbenzenesulfonylhydrazide
  • TSH p-toluenesulfonylhydrazide
  • the substrate 12 is selected from polyethylene terephthalate (PET).
  • a curing agent is further included in the first adhesive layer 11 and/or the second adhesive layer 13.
  • the curing agent in the first adhesive layer 11 may be the same as or different from the curing agent in the second adhesive layer 13.
  • the curing agent is a room temperature curing agent.
  • the curing agent is selected from one or more of an aliphatic polyamine, an alicyclic polyamine, a low molecular polyamide, a modified aromatic amine, and an isocyanate.
  • the thickness of the second adhesive layer 11 is from 30 ⁇ m to 50 ⁇ m.
  • the substrate 12 has a thickness of 15 ⁇ m to 36 ⁇ m.
  • the object to be bonded is the current collector 2, and before the active material layer 3 is applied on the current collector 2, the structural adhesive paper 1 is applied.
  • the first adhesive layer 11 is adhered to the reserved region 21 of the current collector 2 forming the tabs.
  • the active material layer 3 is coated on the current collector 2, the active material layer 3 is dried and dried. Thereafter, the structural adhesive tape 1 is peeled off to form a reserved area 21 of the tab.
  • the method for preparing the structural adhesive paper 1 according to the second aspect of the present invention for preparing the structural adhesive paper 1 according to the first aspect of the present invention, comprising the steps of: stirring the first adhesive 111 and the first solvent; a slurry of the first adhesive layer 11; a slurry of the second adhesive 131, the blowing agent particles 132 and the second solvent to form a second adhesive layer 13; and a second adhesive layer 13
  • the slurry is disposed on the substrate 12, heated to a first temperature for drying to remove the second solvent, the first temperature being lower than the foaming temperature of the blowing agent particles 132 and ensuring that the blowing agent particles 132 are distributed
  • the second adhesive 131, the surface of the second adhesive 131 away from the substrate 12 is the second surface 13S and the partial foaming agent particles 132 are exposed on the second surface 13S and embedded in the first adhesive layer 11, the portion The sum of the cross-sectional areas of the blowing agent particles 132 along the second surface 13S is not less than 20% of the area of the second surface 13S
  • the partial blowing agent particles 132 are embedded in the first adhesive layer 11 and the total cross-sectional area of the partial blowing agent particles 132 along the first surface 11S is not more than 15% of the area of the first surface 11S; heating to the third The temperature is maintained for a while to mature the first adhesive layer 11 and the second adhesive layer 13, completing the preparation of the structural adhesive paper 1.
  • the first temperature is from 75 ° C to 85 ° C.
  • the residual amount of the second solvent accounts for the slurry of the second adhesive layer 13.
  • the ratio of total weight is less than 5%.
  • the second temperature is from 75 ° C to 85 ° C.
  • the third temperature is from 20 ° C to 50 ° C.
  • the slurry of the second adhesive layer 13 is disposed in a manner that is not limited, and may be conventional blade coating, extrusion coating, spraying, Gravure printing, etc.
  • the slurry of the first adhesive layer 11 is disposed in a manner that is not limited, and may be conventional blade coating, extrusion coating, spray coating, Gravure printing or the like is preferably gravure printing in order to precisely control the thickness of the first adhesive layer 11.
  • the EBN and toluene were stirred at a temperature of 40 rpm to 60 rpm to prepare a slurry of the first adhesive layer at room temperature, and the stirring time was 30 min.
  • the blowing agent cyclopentane (foaming temperature is 120 ° C ⁇ 130 ° C) using 150 mesh
  • the sieve was filtered, and then the slurry of the second adhesive layer was stirred with EBN and ethyl acetate at a rotation speed of 40 rpm to 60 rpm, and the stirring time was 30 minutes.
  • the slurry of the second adhesive layer was set on PET (thickness: 19 ⁇ m) by a common blade coating method, and the coating thickness was controlled to be 50 ⁇ m to form a first roll, which was heated to an oven temperature of 75 ° C, first.
  • the roll speed control is 10m/min ⁇ 12m/min
  • the baking time is 2min to remove ethyl acetate
  • the cyclopentane is distributed on the EBN
  • part of the cyclopentane is exposed on the second surface of the second adhesive layer ( Referring to 13S) in Fig. 6, the sum of the cross-sectional areas of the partial cyclopentane along the second surface is not less than 20% of the area of the second surface.
  • the slurry of the first adhesive layer is set on the first roll by gravure coating, and the coating thickness is controlled to be 5 ⁇ m to form a second roll, which is heated to an oven temperature of 75 ° C, and the first material is taken away.
  • the speed control is 20 m/min, and the baking time is 1 min to remove toluene and residual ethyl acetate.
  • the cyclopentane exposed on the second surface is embedded in the first adhesive layer and is not exposed on the first surface (refer to FIG. 6). 11S).
  • the mixture was heated to 45 ° C for aging, and the aging time was 60 h to complete the preparation of the structural adhesive tape.
  • the EBN and toluene were stirred at a temperature of 40 rpm to 60 rpm to prepare a slurry of the first adhesive layer at room temperature, and the stirring time was 30 min.
  • blowing agent cyclopentane (foaming temperature is 120 ° C ⁇ 130 ° C) is filtered through a 150 mesh sieve, and then stirred with polyurethane and ethyl acetate at 40 rpm to 60 rpm to prepare a second adhesive. The slurry of the layer was stirred for 30 min.
  • the slurry of the second adhesive layer was set on PET (thickness: 19 ⁇ m) by a common blade coating method, and the coating thickness was controlled to be 50 ⁇ m to form a first roll, which was heated to an oven temperature of 75 ° C, first.
  • the roll speed control is 10m/min ⁇ 12m/min
  • the baking time is 2min to remove ethyl acetate
  • the cyclopentane is distributed on the EBN
  • part of the cyclopentane is exposed on the second surface of the second adhesive layer ( Referring to 13S) in Fig. 6, the sum of the cross-sectional areas of the partial cyclopentane along the second surface is not less than 20% of the area of the second surface.
  • the slurry of the first adhesive layer is set on the first roll by gravure coating, and the coating thickness is controlled to be 5 ⁇ m to form a second roll, which is heated to an oven temperature of 75 ° C, and the first material is taken away.
  • Speed control is 20m/min
  • baking time is 1min to remove toluene and residual ethyl acetate, the above is exposed
  • the cyclopentane of the second surface is embedded in the first adhesive layer and exposed on the first surface (refer to 11S in FIG. 6), and the sum of the cross-sectional areas controlling the cyclopentane along the first surface is not greater than the area of the first surface. 15%.
  • the mixture was heated to 45 ° C for aging, and the aging time was 60 h to complete the preparation of the structural adhesive tape.
  • the blowing agent cyclopentane (foaming temperature is 120 ° C ⁇ 130 ° C) is filtered through a 150 mesh sieve, and then stirred with EBN and toluene at a speed of 40 rpm to 60 rpm to prepare a slurry of the adhesive layer.
  • the stirring time is 30 min.
  • the slurry of the adhesive layer was set on PET (thickness: 19 ⁇ m) by a common blade coating method, and the coating thickness was controlled to be 50 ⁇ m to form a roll, which was heated to an oven temperature of 75 ° C, and the roll speed control was controlled. 10 m / min ⁇ 12 m / min, baking time 2 min to remove toluene.
  • the structural adhesive sheets of Examples 1-2 and Comparative Example 1 were bonded to a current collector, baked in an oven at 125 ° C for 20 s to foam cyclopentane, and then the structural adhesive paper was collected from the current collector using a high iron tensile machine. Peel off, test the peel force between the structural adhesive tape and the current collector.

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  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)

Abstract

The present invention provides a structural adhesive tape, the structural adhesive tape comprising: a first adhesive layer for adhering to an adhered object and comprising a first adhesive, the surface of the first adhesive layer adhering to the adhered object being a first surface; a substrate disposed on the side of the structural adhesive tape furthest from the adhered object; and a second adhesive layer disposed between the first adhesive layer and the substrate. The second adhesive layer comprises a second adhesive and foam particles distributed in the second adhesive, and the surface of the second adhesive furthest from the substrate is a second surface. A portion of the foam particles extends from the second surface into the first adhesive layer, wherein the total cross-sectional area of the portion of the particles along the second surface is at least 20% of the area of the second surface, and the total cross-sectional area of the portion of the particles along the first surface is at most 15% of the area of the first surface. The structural adhesive tape of the present invention resolves the issue found in conventional adhesive tape of severe fluctuations in adhesiveness after activation of foam particles.

Description

结构胶纸及其制备方法Structural adhesive paper and preparation method thereof 技术领域Technical field
本发明涉及胶纸领域，尤其涉及一种结构胶纸及其制备方法。The invention relates to the field of adhesive tape, in particular to a structural adhesive tape and a preparation method thereof.
背景技术Background technique
现有技术的胶纸一般采用PET基材和丙烯酸酯系压敏型胶黏剂加发泡剂实现发泡从而与集流体产生剥离，以在集流体上预留出极耳位。参照图8A和图8B，当胶黏剂中的残余溶剂量过大时(>10％)，发泡剂被完全包覆在胶黏剂中，即使发泡剂发泡后膨胀，也无法有效减小胶黏剂与集流体的接触面积，导致胶纸难以剥离，无法在集流体上预留出极耳位。参照图9A和图9B，当胶黏剂中的残余溶剂量相对合适时(5％～10％)，部分发泡剂挨着胶黏剂与集流体之间的界面，发泡剂发泡后可以有效减小胶黏剂与集流体的接触面积，胶纸可以正常剥离，但是该工艺要求苛刻，合格率较低，无法满足批量化生产的需求。参照图10A和图10B，当胶黏剂中残余溶剂量过低时(<5％)，大多数发泡剂已经裸露在胶黏剂之外，发泡剂发泡后，胶黏剂几乎与集流体失去粘结，导致胶纸失粘，污染烘箱。The prior art adhesive tape generally uses a PET substrate and an acrylate-based pressure-sensitive adhesive plus a foaming agent to achieve foaming to peel off from the current collector to reserve a polar ear position on the current collector. Referring to FIGS. 8A and 8B, when the amount of residual solvent in the adhesive is too large (>10%), the foaming agent is completely coated in the adhesive, and even if the foaming agent expands after foaming, it is not effective. Reducing the contact area between the adhesive and the current collector makes the adhesive paper difficult to peel off, and it is impossible to reserve a polar ear position on the current collector. Referring to FIG. 9A and FIG. 9B, when the amount of residual solvent in the adhesive is relatively suitable (5% to 10%), a part of the foaming agent is placed at the interface between the adhesive and the current collector, and the foaming agent is foamed. The contact area between the adhesive and the current collector can be effectively reduced, and the adhesive tape can be peeled off normally, but the process is demanding and the pass rate is low, which cannot meet the demand for mass production. Referring to Figures 10A and 10B, when the amount of residual solvent in the adhesive is too low (<5%), most of the blowing agent has been exposed to the adhesive, and after the foaming agent is foamed, the adhesive is almost The current collector loses its bond, causing the adhesive to become tacky and contaminate the oven.
由于通常发泡剂本身粒径分布较宽(5μm～30μm)，混合在胶黏剂中进行涂布烘干，容易出现两种失效模式。第一种，胶黏剂层过厚，发泡剂发泡膨胀不能有效减小胶黏剂与集流体的接触面积，导致发泡后粘性过大，无法从集流体的空箔区剥离，造成断带。第二种，胶黏剂层过薄，发泡剂裸露在胶黏剂外，阻碍了胶黏剂与集流体的空箔区的接触，造成发泡后粘性过弱，由于发泡剂发泡时涂层未完全干燥，因此发泡剂粘性偏弱时，容易被热风带起，粘在湿膜区，湿膜干燥后，发泡剂嵌入力度增大，无法正常剥离，也会造成断带。Since the foaming agent itself generally has a wide particle size distribution (5 μm to 30 μm), it is easy to appear two failure modes by mixing and drying in an adhesive. In the first type, the adhesive layer is too thick, and the expansion and expansion of the foaming agent cannot effectively reduce the contact area between the adhesive and the current collector, resulting in excessive viscosity after foaming, which cannot be peeled off from the empty foil area of the current collector, resulting in Broken belt. Secondly, the adhesive layer is too thin, and the foaming agent is exposed outside the adhesive, which hinders the contact between the adhesive and the empty foil area of the current collector, resulting in weak viscosity after foaming, due to foaming of the foaming agent. When the coating is not completely dry, when the viscosity of the foaming agent is weak, it is easily brought up by the hot air and sticks to the wet film area. After the wet film is dried, the foaming agent is intensively inserted and cannot be peeled off normally, and the broken band is also caused. .
另外，由于胶黏剂层的厚度通常要求范围较小，常规的涂布工艺精度无法满足要求，厚度波动导致大量产品报废。 In addition, since the thickness of the adhesive layer is usually required to be small, the precision of the conventional coating process cannot meet the requirements, and the thickness fluctuation causes a large amount of products to be scrapped.
发明内容Summary of the invention
鉴于背景技术中存在的问题，本发明的一目的在于提供一种结构胶纸及其制备方法，所述结构胶纸中的发泡剂颗粒发泡后，结构胶纸与被粘接对象的粘性一致性极高，易于进行批量化生产，解决了常规胶纸中发泡剂发泡后粘性波动严重的问题。In view of the problems in the prior art, an object of the present invention is to provide a structural adhesive tape and a method for preparing the same, wherein the foaming agent particles in the structural adhesive tape are viscous, and the adhesive of the structural adhesive paper and the object to be bonded The consistency is extremely high, and it is easy to carry out batch production, and solves the problem that the viscosity of the foaming agent in the conventional adhesive paper is severely fluctuated after foaming.
本发明的另一目的在于提供一种结构胶纸及其制备方法，所述结构胶纸能提升电池活性物质的利用率、避免活性物质的浪费，同时提升电池的能量密度、快冲快放性能以及散热性能。Another object of the present invention is to provide a structural adhesive tape and a preparation method thereof, which can improve the utilization rate of the active material of the battery, avoid waste of the active material, and improve the energy density and fast-release performance of the battery. And heat dissipation.
为了达到上述目的，在本发明的一方面，本发明提供了一种结构胶纸，其包括：第一胶黏剂层，用于粘接在被粘接对象上且包含第一胶黏剂，第一胶黏剂层的粘接在被粘接对象上的表面为第一表面；基材，位于结构胶纸的远离被粘接对象的一侧；以及第二胶黏剂层，位于第一胶黏剂层与基材之间。第二胶黏剂层包括：第二胶黏剂；以及发泡剂颗粒，分布于第二胶黏剂。第二胶黏剂的远离基材的表面为第二表面，且部分发泡剂颗粒露出于第二表面并嵌入第一胶黏剂层，所述部分发泡剂颗粒沿第二表面的截面积的总和不小于第二表面的面积的20％，且所述部分发泡剂颗粒沿第一表面的截面积的总和不大于第一表面的面积的15％。In order to achieve the above object, in one aspect of the invention, the present invention provides a structural adhesive tape comprising: a first adhesive layer for bonding to an object to be bonded and comprising a first adhesive, The surface of the first adhesive layer bonded to the object to be bonded is a first surface; the substrate is located on a side of the structural adhesive tape away from the object to be bonded; and the second adhesive layer is located at the first Between the adhesive layer and the substrate. The second adhesive layer comprises: a second adhesive; and a blowing agent particle distributed on the second adhesive. The surface of the second adhesive away from the substrate is a second surface, and part of the foaming agent particles are exposed on the second surface and embedded in the first adhesive layer, and the cross-sectional area of the partial foaming agent particles along the second surface The sum of the sum is not less than 20% of the area of the second surface, and the sum of the cross-sectional areas of the partial blowing agent particles along the first surface is not more than 15% of the area of the first surface.
在本发明的另一方面，本发明提供了一种结构胶纸的制备方法，用于制备本发明一方面所述的结构胶纸，包括步骤：将第一胶黏剂以及第一溶剂搅拌制成第一胶黏剂层的浆料；将第二胶黏剂、发泡剂颗粒以及第二溶剂搅拌制成第二胶黏剂层的浆料；将第二胶黏剂层的浆料设置于基材上，加热至第一温度进行烘干以除去第二溶剂，所述第一温度低于发泡剂颗粒的发泡温度且保证发泡剂颗粒分布于第二胶黏剂，第二胶黏剂的远离基材的表面为第二表面且部分发泡剂颗粒露出于第二表面，所述部分发泡剂颗粒沿第二表面的截面积的总和不小于第二表面的面积的20％；将第一胶黏剂层的浆料设置于在第二胶黏剂层，加热至第二温度进行烘干以除去第一溶剂以及残存的第二溶剂，所述第二温度低于发泡剂颗粒的发泡温度，以便于烘干后第一胶黏剂层粘接在被粘接对象上，第一胶黏剂层的粘接在被粘接对象上的表面为第一表面，所述部分发泡剂颗粒嵌入第一胶黏剂层且所述部分发泡剂颗粒沿第一表面的截面积的总和不大于第一表面的面积的15％；加热至第三温度并保持 一段时间以使第一胶黏剂层和第二胶黏剂层熟化，完成结构胶纸的制备。In another aspect of the invention, the invention provides a method for preparing a structural adhesive tape for preparing the structural adhesive tape according to one aspect of the invention, comprising the steps of: stirring a first adhesive and a first solvent; a slurry of the first adhesive layer; a second adhesive, a blowing agent particle and a second solvent are stirred to form a slurry of the second adhesive layer; and the slurry of the second adhesive layer is set On the substrate, heating to a first temperature for drying to remove the second solvent, the first temperature being lower than the foaming temperature of the blowing agent particles and ensuring distribution of the blowing agent particles to the second adhesive, second The surface of the adhesive that is away from the substrate is the second surface and a portion of the blowing agent particles are exposed on the second surface, and the sum of the cross-sectional areas of the partial blowing agent particles along the second surface is not less than 20 of the area of the second surface. %; the slurry of the first adhesive layer is disposed on the second adhesive layer, heated to a second temperature for drying to remove the first solvent and the remaining second solvent, the second temperature is lower than the hair Foaming temperature of the foaming agent particles, so that the first adhesive layer is bonded after being dried a surface of the first adhesive layer adhered to the object to be bonded is a first surface, the part of the foaming agent particles is embedded in the first adhesive layer, and the part of the foaming agent particles is along The sum of the cross-sectional areas of one surface is not more than 15% of the area of the first surface; heating to the third temperature and maintaining The preparation of the structural adhesive tape is completed by aging the first adhesive layer and the second adhesive layer for a period of time.
相对于现有技术，本发明的有益效果为：Compared with the prior art, the beneficial effects of the present invention are:
本发明的结构胶纸具有双层胶黏剂结构，所述结构胶纸中的发泡剂颗粒发泡后，结构胶纸与被粘接对象的粘性一致性极高，易于进行批量化生产，解决了常规胶纸中发泡剂发泡后粘性波动严重的问题。The structural adhesive tape of the invention has a double-layer adhesive structure, and after the foaming agent particles in the structural adhesive tape are foamed, the adhesiveness of the structural adhesive paper and the object to be bonded is extremely high, and the batch production is easy. The problem that the viscosity of the foaming agent in the conventional adhesive tape is severe after foaming is solved.
附图说明DRAWINGS
图1为根据本发明的结构胶纸所应用的被粘结对象集流体的立体图；1 is a perspective view of a current collector of a bonded object to which a structural adhesive tape according to the present invention is applied;
图2为根据本发明的结构胶纸粘贴于被粘结对象集流体的立体图；Figure 2 is a perspective view of a structural adhesive tape adhered to a current collector of a bonded object according to the present invention;
图3为根据本发明的结构胶纸涂布活性物质层的立体图；Figure 3 is a perspective view of a structural adhesive paper coated active material layer in accordance with the present invention;
图4为根据本发明的结构胶纸剥离后的立体图；Figure 4 is a perspective view of the structural adhesive tape after peeling according to the present invention;
图5为根据本发明的结构胶纸的一立体图；Figure 5 is a perspective view of a structural adhesive tape according to the present invention;
图6为图5的一前视图；Figure 6 is a front view of Figure 5;
图7为图6的一分解图；Figure 7 is an exploded view of Figure 6;
图8A至图8B为现有技术的胶纸的一实施例的一示意图，其中，图8A示出发泡剂发泡前的示意图，图8B示出发泡剂发泡后的示意图；8A to 8B are schematic views of an embodiment of a prior art adhesive tape, wherein FIG. 8A shows a schematic view of the foaming agent before foaming, and FIG. 8B shows a schematic view of the foaming agent after foaming;
图9A至图9B为现有技术的胶纸的另一实施例的一示意图，其中，图9A示出发泡剂发泡前的示意图，图9B示出发泡剂发泡后的示意图；9A to 9B are schematic views showing another embodiment of the prior art adhesive tape, wherein FIG. 9A shows a schematic view of the foaming agent before foaming, and FIG. 9B shows a schematic view of the foaming agent after foaming;
图10A至图10B为现有技术的胶纸的又一实施例的一示意图，其中，图10A示出发泡剂发泡前的示意图，图10B示出发泡剂发泡后的示意图。10A to 10B are schematic views showing still another embodiment of the prior art adhesive tape, wherein Fig. 10A shows a schematic view before foaming of the foaming agent, and Fig. 10B shows a schematic view after foaming of the foaming agent.
其中，附图标记说明如下：Among them, the reference numerals are as follows:
1 结构胶纸1 structural adhesive tape
11 第一胶黏剂层11 first adhesive layer
111 第一胶黏剂111 first adhesive
11S 第一表面11S first surface
12 基材12 substrate
13 第二胶黏剂层13 second adhesive layer
131 第二胶黏剂131 second adhesive
132 发泡剂颗粒132 blowing agent particles
13S 第二表面 13S second surface
2 集流体2 current collector
21 预留区域21 reserved area
3 活性物质层3 active material layer
W 宽度方向W width direction
L 长度方向L length direction
T 厚度方向T thickness direction
1＇ 基材1' substrate
2＇ 胶黏剂层2' adhesive layer
21＇ 发泡剂21' foaming agent
具体实施方式detailed description
下面详细说明根据本发明的结构胶纸及其制备方法。The structural adhesive paper according to the present invention and a method for producing the same are explained in detail below.
首先说明根据本发明第一方面的结构胶纸。First, the structural adhesive tape according to the first aspect of the invention will be explained.
参照图3、图5至图7，根据本发明第一方面的结构胶纸1，包括：第一胶黏剂层11，用于粘接在被粘接对象上且包含第一胶黏剂111，第一胶黏剂层11的粘接在被粘接对象上的表面为第一表面11S；基材12，位于结构胶纸1的远离被粘接对象的一侧；以及第二胶黏剂层13，位于第一胶黏剂层11与基材12之间。第二胶黏剂层13包括：第二胶黏剂131；以及发泡剂颗粒132，分布于第二胶黏剂131。第二胶黏剂131的远离基材12的表面为第二表面13S，且部分发泡剂颗粒132露出于第二表面13S并嵌入第一胶黏剂层11，所述部分发泡剂颗粒132沿第二表面13S的截面积的总和不小于第二表面13S的面积的20％，且所述部分发泡剂颗粒132沿第一表面11S的截面积的总和不大于第一表面11S的面积的15％。当结构胶纸1受热烘干时，发泡剂颗粒132发泡以使得基材12由宽度方向W的对向两侧缘向中间部分卷曲，且所述部分露出于第二表面13S的发泡剂颗粒132发泡以使与其位置对应的部分第一胶黏剂层11与被粘接对象脱离，而第一胶黏剂层11的其余部分保持与被粘接对象粘接不脱离。Referring to FIG. 3 and FIG. 5 to FIG. 7, the structural adhesive tape 1 according to the first aspect of the present invention comprises: a first adhesive layer 11 for bonding to the object to be bonded and comprising the first adhesive 111. a surface of the first adhesive layer 11 adhered to the object to be bonded is a first surface 11S; a substrate 12 on a side of the structural adhesive tape 1 away from the object to be bonded; and a second adhesive The layer 13 is located between the first adhesive layer 11 and the substrate 12. The second adhesive layer 13 includes: a second adhesive 131; and a blowing agent particle 132 distributed on the second adhesive 131. The surface of the second adhesive 131 remote from the substrate 12 is the second surface 13S, and a portion of the blowing agent particles 132 are exposed on the second surface 13S and embedded in the first adhesive layer 11, the partial blowing agent particles 132. The sum of the sectional areas along the second surface 13S is not less than 20% of the area of the second surface 13S, and the sum of the sectional areas of the partial blowing agent particles 132 along the first surface 11S is not greater than the area of the first surface 11S. 15%. When the structural adhesive sheet 1 is dried by heat, the blowing agent particles 132 are foamed so that the substrate 12 is curled toward the intermediate portion from the opposite side edges of the width direction W, and the portion is exposed to the foaming of the second surface 13S. The agent particles 132 are foamed so that a portion of the first adhesive layer 11 corresponding to the position thereof is detached from the object to be bonded, and the remaining portion of the first adhesive layer 11 remains adhered to the object to be bonded.
在根据本发明第一方面所述的结构胶纸1中，结构胶纸1具有双层胶黏剂结构(即第一胶黏剂层11以及第二胶黏剂层13)，发泡剂颗粒132发泡 后，结构胶纸1与被粘接对象的粘性一致性极高，易于进行批量化生产，解决了常规胶纸中发泡剂发泡后粘性波动严重的问题。In the structural adhesive sheet 1 according to the first aspect of the present invention, the structural adhesive sheet 1 has a double-layer adhesive structure (i.e., the first adhesive layer 11 and the second adhesive layer 13), and the foaming agent particles 132 foam After that, the structural adhesive paper 1 has extremely high viscosity consistency with the object to be bonded, and is easy to be mass-produced, thereby solving the problem that the viscosity of the foaming agent in the conventional adhesive paper is severely fluctuated after foaming.
在根据本发明第一方面所述的结构胶纸1中，所述部分发泡剂颗粒132沿第二表面13S的截面积的总和不小于第二表面13S的面积的50％。In the structural adhesive sheet 1 according to the first aspect of the invention, the total sectional area of the partial blowing agent particles 132 along the second surface 13S is not less than 50% of the area of the second surface 13S.
在根据本发明第一方面所述的结构胶纸1中，所述部分发泡剂颗粒132沿第一表面11S的截面积的总和为零。保证在发泡剂颗粒132未发泡的情况下，结构胶纸1的第一胶黏剂层11牢固地粘接在被粘接对象上，当发泡剂颗粒132发泡后，所述部分露出于第二表面13S的发泡剂颗粒132(即位于第一胶黏剂层11中的发泡剂颗粒)发泡以冲破第一胶黏剂层11，使得第一胶黏剂层11的一部分(对应含有发泡剂颗粒132的部分)与被粘接对象脱离，而另一部分保持与被粘接对象粘接不脱离。此时，第一胶黏剂111与第二胶黏剂131的材质可以相同，也可以不同。优选地，第一胶黏剂111可选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。第二胶黏剂131可选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。丙烯酸酯型胶黏剂优选可为丙烯酸2-甲基乙酯(EBN)。In the structural adhesive sheet 1 according to the first aspect of the invention, the total of the cross-sectional areas of the partial blowing agent particles 132 along the first surface 11S is zero. It is ensured that in the case where the blowing agent particles 132 are not foamed, the first adhesive layer 11 of the structural adhesive paper 1 is firmly bonded to the object to be bonded, and when the blowing agent particles 132 are foamed, the portion The blowing agent particles 132 exposed to the second surface 13S (i.e., the blowing agent particles located in the first adhesive layer 11) are foamed to break through the first adhesive layer 11, so that the first adhesive layer 11 One part (corresponding to the portion containing the blowing agent particles 132) is separated from the object to be bonded, and the other portion is kept from being bonded to the object to be bonded without being separated. At this time, the materials of the first adhesive 111 and the second adhesive 131 may be the same or different. Preferably, the first adhesive 111 may be selected from one or more of an acrylate type adhesive and a urethane adhesive. The second adhesive 131 may be selected from one or more of an acrylate type adhesive and a urethane adhesive. The acrylate type adhesive may preferably be 2-methylethyl acrylate (EBN).
在根据本发明第一方面所述的结构胶纸1中，当所述部分发泡剂颗粒132沿第一表面11S的截面积的总和不为零时，第一胶黏剂111与第二胶黏剂131的材质不同。优选地使第一胶黏剂层11与被粘接对象之间的粘结力小于第一胶黏剂层11与第二胶黏剂层13以及第二胶黏剂层13与基材12之间的粘结力。第一胶黏剂111可选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。第二胶黏剂131可选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。丙烯酸酯型胶黏剂优选可为丙烯酸2-甲基乙酯(EBN)。In the structural adhesive sheet 1 according to the first aspect of the present invention, when the total of the cross-sectional areas of the partial foaming agent particles 132 along the first surface 11S is not zero, the first adhesive 111 and the second adhesive The material of the adhesive 131 is different. Preferably, the adhesion between the first adhesive layer 11 and the object to be bonded is less than that of the first adhesive layer 11 and the second adhesive layer 13 and the second adhesive layer 13 and the substrate 12. The adhesion between the two. The first adhesive 111 may be selected from one or more of an acrylate type adhesive and a urethane adhesive. The second adhesive 131 may be selected from one or more of an acrylate type adhesive and a urethane adhesive. The acrylate type adhesive may preferably be 2-methylethyl acrylate (EBN).
在根据本发明第一方面所述的结构胶纸1中，第一胶黏剂层11的厚度为1μm～10μm，优选地，第一胶黏剂层11的厚度为2μm～6μm，进一步优选地，第一胶黏剂层11的厚度为3μm～4μm。In the structural adhesive sheet 1 according to the first aspect of the invention, the thickness of the first adhesive layer 11 is from 1 μm to 10 μm, preferably, the thickness of the first adhesive layer 11 is from 2 μm to 6 μm, further preferably The thickness of the first adhesive layer 11 is 3 μm to 4 μm.
在根据本发明第一方面所述的结构胶纸1中，发泡剂颗粒132的粒径为5μm～30μm。In the structural adhesive sheet 1 according to the first aspect of the invention, the particle size of the blowing agent particles 132 is from 5 μm to 30 μm.
在根据本发明第一方面所述的结构胶纸1中，发泡剂颗粒132为物理发泡剂和/或化学发泡剂。所述物理发泡剂为烷烃类长链系列发泡剂，优选地，所述物理发泡剂选自异戊烷发泡剂、异丁烷发泡剂、环戊烷发泡剂中的一种 或几种。所述化学发泡剂选自偶氮二甲酰胺(AC)、偶氮二异丁腈(AIBN)、N,N-二亚硝基五次甲基四胺(DPT)、4,4'-氧代双苯磺酰肼(OBSH)、对甲苯磺酰肼(TSH)中的一种或几种。In the structural adhesive sheet 1 according to the first aspect of the invention, the blowing agent particles 132 are physical blowing agents and/or chemical blowing agents. The physical foaming agent is an alkane long-chain series foaming agent. Preferably, the physical foaming agent is selected from the group consisting of isopentane foaming agent, isobutane foaming agent and cyclopentane foaming agent. Species Or several. The chemical blowing agent is selected from the group consisting of azodicarbonamide (AC), azobisisobutyronitrile (AIBN), N,N-dinitrosopentamethylenetetramine (DPT), 4,4'- One or more of oxybisbenzenesulfonylhydrazide (OBSH) and p-toluenesulfonylhydrazide (TSH).
在根据本发明第一方面所述的结构胶纸1中，基材12选自聚对苯二甲酸乙二醇酯(PET)。In the structural adhesive sheet 1 according to the first aspect of the invention, the substrate 12 is selected from polyethylene terephthalate (PET).
在根据本发明第一方面所述的结构胶纸1中，第一胶黏剂层11和/或第二胶黏剂层13中还包括固化剂。第一胶黏剂层11中的固化剂与第二胶黏剂层13中的固化剂可以相同，也可以不同。所述固化剂为室温固化剂，优选地，所述固化剂选自脂肪族多胺、脂环族多胺、低分子聚酰胺、改性芳胺、异氰酸酯中的一种或几种。In the structural adhesive sheet 1 according to the first aspect of the invention, a curing agent is further included in the first adhesive layer 11 and/or the second adhesive layer 13. The curing agent in the first adhesive layer 11 may be the same as or different from the curing agent in the second adhesive layer 13. The curing agent is a room temperature curing agent. Preferably, the curing agent is selected from one or more of an aliphatic polyamine, an alicyclic polyamine, a low molecular polyamide, a modified aromatic amine, and an isocyanate.
在根据本发明第一方面所述的结构胶纸1中，第二胶黏剂层11的厚度为30μm～50μm。In the structural adhesive sheet 1 according to the first aspect of the invention, the thickness of the second adhesive layer 11 is from 30 μm to 50 μm.
在根据本发明第一方面所述的结构胶纸1中，基材12的厚度为15μm～36μm。In the structural adhesive sheet 1 according to the first aspect of the invention, the substrate 12 has a thickness of 15 μm to 36 μm.
参照图1至图4，在根据本发明第一方面所述的结构胶纸1中，被粘接对象为集流体2，在集流体2上涂布活性物质层3之前，将结构胶纸1的第一胶黏剂层11粘贴于集流体2的形成极耳的预留区域21处，当在集流体2上涂布活性物质层3之后对活性物质层3的进行烘干，烘干完成后，剥离结构胶纸1，形成极耳的预留区域21。Referring to FIGS. 1 to 4, in the structural adhesive sheet 1 according to the first aspect of the present invention, the object to be bonded is the current collector 2, and before the active material layer 3 is applied on the current collector 2, the structural adhesive paper 1 is applied. The first adhesive layer 11 is adhered to the reserved region 21 of the current collector 2 forming the tabs. After the active material layer 3 is coated on the current collector 2, the active material layer 3 is dried and dried. Thereafter, the structural adhesive tape 1 is peeled off to form a reserved area 21 of the tab.
其次说明根据本发明第二方面的结构胶纸的制备方法。Next, a method of preparing a structural adhesive tape according to the second aspect of the present invention will be described.
根据本发明第二方面所述的结构胶纸1的制备方法，用于制备本发明第一方面所述的结构胶纸1，包括步骤：将第一胶黏剂111以及第一溶剂搅拌制成第一胶黏剂层11的浆料；将第二胶黏剂131、发泡剂颗粒132以及第二溶剂搅拌制成第二胶黏剂层13的浆料；将第二胶黏剂层13的浆料设置于基材12上，加热至第一温度进行烘干以除去第二溶剂，所述第一温度低于发泡剂颗粒132的发泡温度且保证发泡剂颗粒132分布于第二胶黏剂131，第二胶黏剂131的远离基材12的表面为第二表面13S且部分发泡剂颗粒132露出于第二表面13S并嵌入第一胶黏剂层11，所述部分发泡剂颗粒132沿第二表面13S的截面积的总和不小于第二表面13S的面积的20％；将第一胶黏 剂层11的浆料设置于在第二胶黏剂层13，加热至第二温度进行烘干以除去第一溶剂以及残存的第二溶剂，所述第二温度低于发泡剂颗粒132的发泡温度，以便于烘干后第一胶黏剂层11粘接在被粘接对象上，第一胶黏剂层11的粘接在被粘接对象上的表面为第一表面11S，所述部分发泡剂颗粒132嵌入第一胶黏剂层11且所述部分发泡剂颗粒132沿第一表面11S的截面积的总和不大于第一表面11S的面积的15％；加热至第三温度并保持一段时间以使第一胶黏剂层11和第二胶黏剂层13熟化，完成结构胶纸1的制备。The method for preparing the structural adhesive paper 1 according to the second aspect of the present invention, for preparing the structural adhesive paper 1 according to the first aspect of the present invention, comprising the steps of: stirring the first adhesive 111 and the first solvent; a slurry of the first adhesive layer 11; a slurry of the second adhesive 131, the blowing agent particles 132 and the second solvent to form a second adhesive layer 13; and a second adhesive layer 13 The slurry is disposed on the substrate 12, heated to a first temperature for drying to remove the second solvent, the first temperature being lower than the foaming temperature of the blowing agent particles 132 and ensuring that the blowing agent particles 132 are distributed The second adhesive 131, the surface of the second adhesive 131 away from the substrate 12 is the second surface 13S and the partial foaming agent particles 132 are exposed on the second surface 13S and embedded in the first adhesive layer 11, the portion The sum of the cross-sectional areas of the blowing agent particles 132 along the second surface 13S is not less than 20% of the area of the second surface 13S; the first adhesive is to be The slurry of the agent layer 11 is disposed on the second adhesive layer 13, heated to a second temperature for drying to remove the first solvent and the remaining second solvent, the second temperature being lower than the blowing agent particles 132 Foaming temperature, so that the first adhesive layer 11 is adhered to the object to be bonded after drying, and the surface of the first adhesive layer 11 adhered to the object to be bonded is the first surface 11S. The partial blowing agent particles 132 are embedded in the first adhesive layer 11 and the total cross-sectional area of the partial blowing agent particles 132 along the first surface 11S is not more than 15% of the area of the first surface 11S; heating to the third The temperature is maintained for a while to mature the first adhesive layer 11 and the second adhesive layer 13, completing the preparation of the structural adhesive paper 1.
在根据本发明第二方面所述的结构胶纸1的制备方法中，第一温度为75℃～85℃。In the method of producing the structural adhesive sheet 1 according to the second aspect of the present invention, the first temperature is from 75 ° C to 85 ° C.
在根据本发明第二方面所述的结构胶纸1的制备方法中，加热至第一温度进行烘干除去第二溶剂后，第二溶剂的残余量占第二胶黏剂层13的浆料的总重量的比例低于5％。In the method for producing the structural adhesive sheet 1 according to the second aspect of the present invention, after the second temperature is removed by heating to the first temperature, the residual amount of the second solvent accounts for the slurry of the second adhesive layer 13. The ratio of total weight is less than 5%.
在根据本发明第二方面所述的结构胶纸1的制备方法中，第二温度为75℃～85℃。In the method of producing the structural adhesive sheet 1 according to the second aspect of the present invention, the second temperature is from 75 ° C to 85 ° C.
在根据本发明第二方面所述的结构胶纸1的制备方法中，第三温度为20℃～50℃。In the method of producing the structural adhesive sheet 1 according to the second aspect of the present invention, the third temperature is from 20 ° C to 50 ° C.
在根据本发明第二方面所述的结构胶纸1的制备方法中，第二胶黏剂层13的浆料的设置方式不受限制，可为常规刮刀涂布、挤压涂布、喷涂、凹版印刷等。In the method for preparing the structural adhesive tape 1 according to the second aspect of the present invention, the slurry of the second adhesive layer 13 is disposed in a manner that is not limited, and may be conventional blade coating, extrusion coating, spraying, Gravure printing, etc.
在根据本发明第二方面所述的结构胶纸1的制备方法中，第一胶黏剂层11的浆料的设置方式不受限制，可为常规刮刀涂布、挤压涂布、喷涂、凹版印刷等，优选为凹版印刷，以便于精确控制第一胶黏剂层11的厚度。In the method for preparing the structural adhesive tape 1 according to the second aspect of the present invention, the slurry of the first adhesive layer 11 is disposed in a manner that is not limited, and may be conventional blade coating, extrusion coating, spray coating, Gravure printing or the like is preferably gravure printing in order to precisely control the thickness of the first adhesive layer 11.
下面结合实施例，进一步阐述本申请。应理解，这些实施例仅用于说明本申请而不用于限制本申请的范围。The present application is further illustrated below in conjunction with the embodiments. It is to be understood that the examples are not intended to limit the scope of the application.
实施例1Example 1
室温环境下，将EBN以及甲苯在40rpm～60rpm的转速下搅拌制成第一胶黏剂层的浆料，搅拌时间为30min。The EBN and toluene were stirred at a temperature of 40 rpm to 60 rpm to prepare a slurry of the first adhesive layer at room temperature, and the stirring time was 30 min.
室温环境下，将发泡剂环戊烷(发泡温度为120℃～130℃)采用150目 筛子过滤，之后与EBN、乙酸乙酯在40rpm～60rpm的转速下搅拌制成第二胶黏剂层的浆料，搅拌时间为30min。At room temperature, the blowing agent cyclopentane (foaming temperature is 120 ° C ~ 130 ° C) using 150 mesh The sieve was filtered, and then the slurry of the second adhesive layer was stirred with EBN and ethyl acetate at a rotation speed of 40 rpm to 60 rpm, and the stirring time was 30 minutes.
将第二胶黏剂层的浆料采用普通刮刀涂布的方式设置于PET(厚度为19μm)上，控制涂布厚度为50μm，生成第一料卷，加热至烘箱温度为75℃，第一料卷走速控制为10m/min～12m/min，烘烤时间2min以除去乙酸乙酯，保证环戊烷分布于EBN，且部分环戊烷露出于第二胶黏剂层的第二表面(参照图6中的13S)，所述部分环戊烷沿第二表面的截面积的总和不小于第二表面的面积的20％。The slurry of the second adhesive layer was set on PET (thickness: 19 μm) by a common blade coating method, and the coating thickness was controlled to be 50 μm to form a first roll, which was heated to an oven temperature of 75 ° C, first. The roll speed control is 10m/min~12m/min, the baking time is 2min to remove ethyl acetate, the cyclopentane is distributed on the EBN, and part of the cyclopentane is exposed on the second surface of the second adhesive layer ( Referring to 13S) in Fig. 6, the sum of the cross-sectional areas of the partial cyclopentane along the second surface is not less than 20% of the area of the second surface.
之后在第一料卷上采用凹版涂布的方式设置第一胶黏剂层的浆料，控制涂布厚度为5μm，生成第二料卷，加热至烘箱温度为75℃，第一料卷走速控制为20m/min，烘烤时间1min以除去甲苯以及残存的乙酸乙酯，上述露出于第二表面的环戊烷嵌入第一胶黏剂层且未露出于第一表面(参照图6中的11S)。Then, the slurry of the first adhesive layer is set on the first roll by gravure coating, and the coating thickness is controlled to be 5 μm to form a second roll, which is heated to an oven temperature of 75 ° C, and the first material is taken away. The speed control is 20 m/min, and the baking time is 1 min to remove toluene and residual ethyl acetate. The cyclopentane exposed on the second surface is embedded in the first adhesive layer and is not exposed on the first surface (refer to FIG. 6). 11S).
加热至45℃进行熟化，熟化时间为60h，完成结构胶纸的制备。The mixture was heated to 45 ° C for aging, and the aging time was 60 h to complete the preparation of the structural adhesive tape.
实施例2Example 2
室温环境下，将EBN以及甲苯在40rpm～60rpm的转速下搅拌制成第一胶黏剂层的浆料，搅拌时间为30min。The EBN and toluene were stirred at a temperature of 40 rpm to 60 rpm to prepare a slurry of the first adhesive layer at room temperature, and the stirring time was 30 min.
室温环境下，将发泡剂环戊烷(发泡温度为120℃～130℃)采用150目筛子过滤，之后与聚氨酯、乙酸乙酯在40rpm～60rpm的转速下搅拌制成第二胶黏剂层的浆料，搅拌时间为30min。At room temperature, the blowing agent cyclopentane (foaming temperature is 120 ° C ~ 130 ° C) is filtered through a 150 mesh sieve, and then stirred with polyurethane and ethyl acetate at 40 rpm to 60 rpm to prepare a second adhesive. The slurry of the layer was stirred for 30 min.
将第二胶黏剂层的浆料采用普通刮刀涂布的方式设置于PET(厚度为19μm)上，控制涂布厚度为50μm，生成第一料卷，加热至烘箱温度为75℃，第一料卷走速控制为10m/min～12m/min，烘烤时间2min以除去乙酸乙酯，保证环戊烷分布于EBN，且部分环戊烷露出于第二胶黏剂层的第二表面(参照图6中的13S)，所述部分环戊烷沿第二表面的截面积的总和不小于第二表面的面积的20％。The slurry of the second adhesive layer was set on PET (thickness: 19 μm) by a common blade coating method, and the coating thickness was controlled to be 50 μm to form a first roll, which was heated to an oven temperature of 75 ° C, first. The roll speed control is 10m/min~12m/min, the baking time is 2min to remove ethyl acetate, the cyclopentane is distributed on the EBN, and part of the cyclopentane is exposed on the second surface of the second adhesive layer ( Referring to 13S) in Fig. 6, the sum of the cross-sectional areas of the partial cyclopentane along the second surface is not less than 20% of the area of the second surface.
之后在第一料卷上采用凹版涂布的方式设置第一胶黏剂层的浆料，控制涂布厚度为5μm，生成第二料卷，加热至烘箱温度为75℃，第一料卷走速控制为20m/min，烘烤时间1min以除去甲苯以及残存的乙酸乙酯，上述露出于 第二表面的环戊烷嵌入第一胶黏剂层且露出于第一表面(参照图6中的11S)，且控制环戊烷沿第一表面的截面积的总和不大于第一表面的面积的15％。Then, the slurry of the first adhesive layer is set on the first roll by gravure coating, and the coating thickness is controlled to be 5 μm to form a second roll, which is heated to an oven temperature of 75 ° C, and the first material is taken away. Speed control is 20m/min, baking time is 1min to remove toluene and residual ethyl acetate, the above is exposed The cyclopentane of the second surface is embedded in the first adhesive layer and exposed on the first surface (refer to 11S in FIG. 6), and the sum of the cross-sectional areas controlling the cyclopentane along the first surface is not greater than the area of the first surface. 15%.
加热至45℃进行熟化，熟化时间为60h，完成结构胶纸的制备。The mixture was heated to 45 ° C for aging, and the aging time was 60 h to complete the preparation of the structural adhesive tape.
对比例1Comparative example 1
室温环境下，将发泡剂环戊烷(发泡温度为120℃～130℃)采用150目筛子过滤，之后与EBN、甲苯在40rpm～60rpm的转速下搅拌制成胶黏剂层的浆料，搅拌时间为30min。At room temperature, the blowing agent cyclopentane (foaming temperature is 120 ° C ~ 130 ° C) is filtered through a 150 mesh sieve, and then stirred with EBN and toluene at a speed of 40 rpm to 60 rpm to prepare a slurry of the adhesive layer. The stirring time is 30 min.
将胶黏剂层的浆料采用普通刮刀涂布的方式设置于PET(厚度为19μm)上，控制涂布厚度为50μm，生成料卷，加热至烘箱温度为75℃，料卷走速控制为10m/min～12m/min，烘烤时间2min以除去甲苯。The slurry of the adhesive layer was set on PET (thickness: 19 μm) by a common blade coating method, and the coating thickness was controlled to be 50 μm to form a roll, which was heated to an oven temperature of 75 ° C, and the roll speed control was controlled. 10 m / min ~ 12 m / min, baking time 2 min to remove toluene.
下面说明结构胶纸的测试过程。The test process of the structural adhesive tape will be described below.
将实施例1-2以及对比例1的结构胶纸粘接于集流体上，在125℃的烘箱中烘烤20s，使环戊烷发泡，之后使用高铁拉力机将结构胶纸从集流体上剥离，测试结构胶纸与集流体之间的剥离力。The structural adhesive sheets of Examples 1-2 and Comparative Example 1 were bonded to a current collector, baked in an oven at 125 ° C for 20 s to foam cyclopentane, and then the structural adhesive paper was collected from the current collector using a high iron tensile machine. Peel off, test the peel force between the structural adhesive tape and the current collector.
每组测试10个，测试结果如表1所示。Each group tested 10, and the test results are shown in Table 1.
表1 实施例1-2与对比例1的测试结果Table 1 Test results of Examples 1-2 and Comparative Example 1
Figure PCTCN2016077843-appb-000001
Figure PCTCN2016077843-appb-000001
Figure PCTCN2016077843-appb-000002
Figure PCTCN2016077843-appb-000002
从表1中可以看出，实施例1-2的结构胶纸与集流体的粘性一致性极高，易于进行批量化生产，而对比例1的结构胶纸的发泡剂发泡后粘性波动较大，不利于进行批量化生产。 It can be seen from Table 1 that the structural adhesive tape of Example 1-2 has extremely high viscosity consistency with the current collector, and is easy to be mass-produced, while the foaming agent of the structural adhesive paper of Comparative Example 1 has viscosity fluctuation after foaming. Larger, not conducive to mass production.

Claims (30)

  1. 一种结构胶纸(1)，其特征在于，包括：A structural adhesive tape (1), characterized in that it comprises:
    第一胶黏剂层(11)，用于粘接在被粘接对象上且包含第一胶黏剂(111)，第一胶黏剂层(11)的粘接在被粘接对象上的表面为第一表面(11S)；a first adhesive layer (11) for bonding to the object to be bonded and comprising a first adhesive (111), the first adhesive layer (11) being bonded to the object to be bonded The surface is the first surface (11S);
    基材(12)，位于结构胶纸(1)的远离被粘接对象的一侧；以及a substrate (12) located on a side of the structural adhesive tape (1) away from the object to be bonded;
    第二胶黏剂层(13)，位于第一胶黏剂层(11)与基材(12)之间，包括：The second adhesive layer (13) is located between the first adhesive layer (11) and the substrate (12), and includes:
    第二胶黏剂(131)；以及a second adhesive (131);
    发泡剂颗粒(132)，分布于第二胶黏剂(131)；Foaming agent particles (132), distributed in the second adhesive (131);
    第二胶黏剂(131)的远离基材(12)的表面为第二表面(13S)，且部分发泡剂颗粒(132)露出于第二表面(13S)并嵌入第一胶黏剂层(11)，所述部分发泡剂颗粒(132)沿第二表面(13S)的截面积的总和不小于第二表面(13S)的面积的20％，且所述部分发泡剂颗粒(132)沿第一表面(11S)的截面积的总和不大于第一表面(11S)的面积的15％。The surface of the second adhesive (131) remote from the substrate (12) is a second surface (13S), and a portion of the blowing agent particles (132) are exposed on the second surface (13S) and embedded in the first adhesive layer. (11), the sum of the cross-sectional areas of the partial blowing agent particles (132) along the second surface (13S) is not less than 20% of the area of the second surface (13S), and the partial blowing agent particles (132) The sum of the cross-sectional areas along the first surface (11S) is not more than 15% of the area of the first surface (11S).
  2. 根据权利要求1所述的结构胶纸(1)，其特征在于，所述部分发泡剂颗粒(132)沿第二表面(13S)的截面积的总和不小于第二表面(13S)的面积的50％。The structural adhesive tape (1) according to claim 1, wherein the sum of the sectional areas of the partial blowing agent particles (132) along the second surface (13S) is not less than the area of the second surface (13S) 50%.
  3. 根据权利要求1所述的结构胶纸(1)，其特征在于，所述部分发泡剂颗粒(132)沿第一表面(11S)的截面积的总和为零。A structural adhesive tape (1) according to claim 1, characterized in that the sum of the cross-sectional areas of the partial blowing agent particles (132) along the first surface (11S) is zero.
  4. 根据权利要求3所述的结构胶纸(1)，其特征在于，A structural adhesive tape (1) according to claim 3, characterized in that
    第一胶黏剂(111)选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种；The first adhesive (111) is one or more selected from the group consisting of an acrylate type adhesive and a urethane adhesive;
    第二胶黏剂(131)选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。The second adhesive (131) is one or more selected from the group consisting of an acrylate type adhesive and a urethane adhesive.
  5. 根据权利要求4所述的结构胶纸(1)，其特征在于，丙烯酸酯型胶黏 剂为丙烯酸2-甲基乙酯。The structural adhesive paper (1) according to claim 4, characterized in that the acrylate type adhesive The agent is 2-methylethyl acrylate.
  6. 根据权利要求1所述的结构胶纸(1)，其特征在于，当所述部分发泡剂颗粒(132)沿第一表面(11S)的截面积的总和不为零时，第一胶黏剂(111)与第二胶黏剂(131)的材质不同。The structural adhesive tape (1) according to claim 1, wherein when the total of the cross-sectional areas of the partial foaming agent particles (132) along the first surface (11S) is not zero, the first adhesive The material (111) is different from the material of the second adhesive (131).
  7. 根据权利要求6所述的结构胶纸(1)，其特征在于，第一胶黏剂层(11)与被粘接对象之间的粘结力小于第一胶黏剂层(11)与第二胶黏剂层(13)以及第二胶黏剂层(13)与基材(12)之间的粘结力。The structural adhesive tape (1) according to claim 6, wherein the adhesion between the first adhesive layer (11) and the object to be bonded is smaller than that of the first adhesive layer (11) and The adhesion between the second adhesive layer (13) and the second adhesive layer (13) and the substrate (12).
  8. 根据权利要求6所述的结构胶纸(1)，其特征在于，The structural adhesive tape (1) according to claim 6, wherein
    第一胶黏剂(111)选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种；The first adhesive (111) is one or more selected from the group consisting of an acrylate type adhesive and a urethane adhesive;
    第二胶黏剂(131)选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。The second adhesive (131) is one or more selected from the group consisting of an acrylate type adhesive and a urethane adhesive.
  9. 根据权利要求8所述的结构胶纸(1)，其特征在于，丙烯酸酯型胶黏剂为丙烯酸2-甲基乙酯。The structural adhesive tape (1) according to claim 8, wherein the acrylate type adhesive is 2-methylethyl acrylate.
  10. 根据权利要求1所述的结构胶纸(1)，其特征在于，第一胶黏剂层(11)的厚度为1μm～10μm。The structural adhesive tape (1) according to claim 1, wherein the first adhesive layer (11) has a thickness of from 1 μm to 10 μm.
  11. 根据权利要求10所述的结构胶纸(1)，其特征在于，第一胶黏剂层(11)的厚度为2μm～6μm。The structural adhesive tape (1) according to claim 10, wherein the first adhesive layer (11) has a thickness of from 2 μm to 6 μm.
  12. 根据权利要求11所述的结构胶纸(1)，其特征在于，第一胶黏剂层(11)的厚度为3μm～4μm。The structural adhesive tape (1) according to claim 11, wherein the first adhesive layer (11) has a thickness of from 3 μm to 4 μm.
  13. 根据权利要求1所述的结构胶纸(1)，其特征在于，发泡剂颗粒(132)的粒径为5μm～30μm。 The structural adhesive tape (1) according to claim 1, wherein the foaming agent particles (132) have a particle diameter of from 5 μm to 30 μm.
  14. 根据权利要求13所述的结构胶纸(1)，其特征在于，发泡剂颗粒(132)为物理发泡剂和/或化学发泡剂。The structural adhesive paper (1) according to claim 13, characterized in that the blowing agent particles (132) are physical blowing agents and/or chemical blowing agents.
  15. 根据权利要求14所述的结构胶纸(1)，其特征在于，The structural adhesive tape (1) according to claim 14, wherein
    物理发泡剂选自异戊烷发泡剂、异丁烷发泡剂、环戊烷发泡剂中的一种或几种；The physical foaming agent is selected from one or more of an isopentane blowing agent, an isobutane blowing agent, and a cyclopentane blowing agent;
    化学发泡剂选自偶氮二甲酰胺、偶氮二异丁腈、N,N-二亚硝基五次甲基四胺、4,4'-氧代双苯磺酰肼、对甲苯磺酰肼中的一种或几种。The chemical blowing agent is selected from the group consisting of azodicarbonamide, azobisisobutyronitrile, N,N-dinitrosopentamethylenetetramine, 4,4'-oxobisbenzenesulfonyl hydrazide, p-toluene One or several of the hydrazides.
  16. 根据权利要求1所述的结构胶纸(1)，其特征在于，基材(12)选自聚对苯二甲酸乙二醇酯。A structural adhesive tape (1) according to claim 1, characterized in that the substrate (12) is selected from the group consisting of polyethylene terephthalate.
  17. 根据权利要求1所述的结构胶纸(1)，其特征在于，第一胶黏剂层(11)和/或第二胶黏剂层(13)中还包括固化剂。The structural adhesive paper (1) according to claim 1, characterized in that the first adhesive layer (11) and/or the second adhesive layer (13) further comprise a curing agent.
  18. 根据权利要求17所述的结构胶纸(1)，其特征在于，固化剂为室温固化剂。The structural adhesive tape (1) according to claim 17, wherein the curing agent is a room temperature curing agent.
  19. 根据权利要求18所述的结构胶纸(1)，其特征在于，固化剂选自脂肪族多胺、脂环族多胺、低分子聚酰胺、改性芳胺、异氰酸酯中的一种或几种。The structural adhesive paper (1) according to claim 18, wherein the curing agent is one or more selected from the group consisting of an aliphatic polyamine, an alicyclic polyamine, a low molecular polyamide, a modified aromatic amine, and an isocyanate. Kind.
  20. 根据权利要求1所述的结构胶纸(1)，其特征在于，第二胶黏剂层(11)的厚度为30μm～50μm。The structural adhesive tape (1) according to claim 1, wherein the second adhesive layer (11) has a thickness of from 30 μm to 50 μm.
  21. 根据权利要求1所述的结构胶纸(1)，其特征在于，基材(12)的厚度为15μm～36μm。The structural adhesive tape (1) according to claim 1, wherein the substrate (12) has a thickness of from 15 μm to 36 μm.
  22. 根据权利要求1-21中任一项所述的结构胶纸(1)，其特征在于，被 粘接对象为集流体(2)，在集流体(2)上涂布活性物质层(3)之前，将结构胶纸(1)的第一胶黏剂层(11)粘贴于集流体(2)的形成极耳的预留区域(21)处，当在集流体(2)上涂布活性物质层(3)之后对活性物质层(3)的进行烘干，烘干完成后，剥离结构胶纸(1)，形成极耳的预留区域(21)。A structural adhesive tape (1) according to any one of claims 1 to 21, characterized in that The bonding object is a current collector (2), and the first adhesive layer (11) of the structural adhesive paper (1) is pasted to the current collector (2) before the active material layer (3) is coated on the current collector (2). At the reserved area (21) where the tabs are formed, the active material layer (3) is dried after the active material layer (3) is coated on the current collector (2), and after the drying is completed, the peeling structure is Adhesive paper (1) forms a reserved area (21) for the tabs.
  23. 一种结构胶纸(1)的制备方法，用于制备权利要求1-22中任一项所述的结构胶纸(1)，包括步骤：A method for preparing a structural adhesive paper (1) for preparing the structural adhesive paper (1) according to any one of claims 1 to 22, comprising the steps of:
    将第一胶黏剂(111)以及第一溶剂搅拌制成第一胶黏剂层(11)的浆料；The first adhesive (111) and the first solvent are stirred to form a slurry of the first adhesive layer (11);
    将第二胶黏剂(131)、发泡剂颗粒(132)以及第二溶剂搅拌制成第二胶黏剂层(13)的浆料；Mixing the second adhesive (131), the blowing agent particles (132) and the second solvent to form a slurry of the second adhesive layer (13);
    将第二胶黏剂层(13)的浆料设置于基材(12)上，加热至第一温度进行烘干以除去第二溶剂，所述第一温度低于发泡剂颗粒(132)的发泡温度且保证发泡剂颗粒(132)分布于第二胶黏剂(131)，第二胶黏剂(131)的远离基材(12)的表面为第二表面(13S)且部分发泡剂颗粒(132)露出于第二表面(13S)，所述部分发泡剂颗粒(132)沿第二表面(13S)的截面积的总和不小于第二表面(13S)的面积的20％；The slurry of the second adhesive layer (13) is disposed on the substrate (12), heated to a first temperature for drying to remove the second solvent, the first temperature being lower than the blowing agent particles (132) The foaming temperature ensures that the blowing agent particles (132) are distributed on the second adhesive (131), and the surface of the second adhesive (131) away from the substrate (12) is the second surface (13S) and a portion The blowing agent particles (132) are exposed on the second surface (13S), and the total sectional area of the partial blowing agent particles (132) along the second surface (13S) is not less than 20 of the area of the second surface (13S) %;
    将第一胶黏剂层(11)的浆料设置于在第二胶黏剂层(13)，加热至第二温度进行烘干以除去第一溶剂以及残存的第二溶剂，所述第二温度低于发泡剂颗粒(132)的发泡温度，以便于烘干后第一胶黏剂层(11)粘接在被粘接对象上，第一胶黏剂层(11)的粘接在被粘接对象上的表面为第一表面(11S)，所述露出于第二表面(13S)的部分发泡剂颗粒(132)嵌入第一胶黏剂层(11)且所述部分发泡剂颗粒(132)沿第一表面(11S)的截面积的总和不大于第一表面(11S)的面积的15％；The slurry of the first adhesive layer (11) is disposed on the second adhesive layer (13), heated to a second temperature for drying to remove the first solvent and the remaining second solvent, the second The temperature is lower than the foaming temperature of the foaming agent particles (132), so that the first adhesive layer (11) is adhered to the object to be bonded after the drying, and the bonding of the first adhesive layer (11) The surface on the object to be bonded is a first surface (11S), and the partially foaming agent particles (132) exposed on the second surface (13S) are embedded in the first adhesive layer (11) and the portion is The sum of the cross-sectional areas of the foaming agent particles (132) along the first surface (11S) is not more than 15% of the area of the first surface (11S);
    加热至第三温度并保持一段时间以使第一胶黏剂层(11)和第二胶黏剂层(13)熟化，完成结构胶纸(1)的制备。The structure of the structural adhesive tape (1) is completed by heating to a third temperature for a period of time to mature the first adhesive layer (11) and the second adhesive layer (13).
  24. 根据权利要求23所述的结构胶纸(1)的制备方法，其特征在于，第一温度为75℃～85℃。 The method of producing a structural adhesive sheet (1) according to claim 23, wherein the first temperature is from 75 ° C to 85 ° C.
  25. 根据权利要求23所述的结构胶纸(1)的制备方法，其特征在于，加热至第一温度进行烘干除去第二溶剂后，第二溶剂的残余量占第二胶黏剂层(13)的浆料的总重量的比例低于5％。The method for preparing a structural adhesive tape (1) according to claim 23, wherein after the second temperature is removed by heating to the first temperature, the residual amount of the second solvent accounts for the second adhesive layer (13). The ratio of the total weight of the slurry is less than 5%.
  26. 根据权利要求23所述的结构胶纸(1)的制备方法，其特征在于，第二温度为75℃～85℃。The method of producing a structural adhesive sheet (1) according to claim 23, wherein the second temperature is from 75 ° C to 85 ° C.
  27. 根据权利要求23所述的结构胶纸(1)的制备方法，其特征在于，第三温度为20℃～50℃。The method of producing a structural adhesive sheet (1) according to claim 23, wherein the third temperature is from 20 ° C to 50 ° C.
  28. 根据权利要求23所述的结构胶纸(1)的制备方法，其特征在于，第二胶黏剂层(13)的浆料的设置方式选自刮刀涂布、挤压涂布、喷涂、凹版印刷中的一种。The method for preparing a structural adhesive tape (1) according to claim 23, wherein the slurry of the second adhesive layer (13) is disposed in a manner selected from the group consisting of blade coating, extrusion coating, spraying, and gravure One of the printing.
  29. 根据权利要求23所述的结构胶纸(1)的制备方法，其特征在于，第一胶黏剂层(11)的浆料的设置方式选自刮刀涂布、挤压涂布、喷涂、凹版印刷中的一种。The method for preparing a structural adhesive tape (1) according to claim 23, wherein the slurry of the first adhesive layer (11) is disposed in a manner selected from the group consisting of blade coating, extrusion coating, spraying, and gravure One of the printing.
  30. 根据权利要求29所述的结构胶纸(1)的制备方法，其特征在于，第一胶黏剂层(11)的浆料的设置方式为凹版印刷。 The method of producing a structural adhesive sheet (1) according to claim 29, characterized in that the slurry of the first adhesive layer (11) is arranged in a gravure printing manner.
PCT/CN2016/077843 2016-03-30 2016-03-30 Structural adhesive tape and manufacturing method thereof WO2017166116A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1451707A (en) * 2002-04-16 2003-10-29 日东电工株式会社 Heat strippable pressure-sensitive adhesive sheet for electronic element, method for producing electronic element and electronic element
CN101126001A (en) * 2006-08-14 2008-02-20 日东电工株式会社 Adhesive sheet, process for producing the same, and method of cutting multilayered ceramic sheet
JP2012033636A (en) * 2010-07-29 2012-02-16 Nitto Denko Corp Thermal peeling sheet integrated film for semiconductor rear face, method of collecting semiconductor element, and method of manufacturing semiconductor device
CN204939378U (en) * 2015-08-03 2016-01-06 宁德新能源科技有限公司 Structure gummed paper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1451707A (en) * 2002-04-16 2003-10-29 日东电工株式会社 Heat strippable pressure-sensitive adhesive sheet for electronic element, method for producing electronic element and electronic element
CN101126001A (en) * 2006-08-14 2008-02-20 日东电工株式会社 Adhesive sheet, process for producing the same, and method of cutting multilayered ceramic sheet
JP2012033636A (en) * 2010-07-29 2012-02-16 Nitto Denko Corp Thermal peeling sheet integrated film for semiconductor rear face, method of collecting semiconductor element, and method of manufacturing semiconductor device
CN204939378U (en) * 2015-08-03 2016-01-06 宁德新能源科技有限公司 Structure gummed paper

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