WO2017181489A1 - 结构胶纸及其制备方法 - Google Patents

结构胶纸及其制备方法 Download PDF

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Publication number
WO2017181489A1
WO2017181489A1 PCT/CN2016/084021 CN2016084021W WO2017181489A1 WO 2017181489 A1 WO2017181489 A1 WO 2017181489A1 CN 2016084021 W CN2016084021 W CN 2016084021W WO 2017181489 A1 WO2017181489 A1 WO 2017181489A1
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WO
WIPO (PCT)
Prior art keywords
adhesive layer
adhesive
structural
substrate
structural adhesive
Prior art date
Application number
PCT/CN2016/084021
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English (en)
French (fr)
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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Publication of WO2017181489A1 publication Critical patent/WO2017181489A1/zh

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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
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/08—Homopolymers or copolymers of acrylic acid esters
    • 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
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • 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
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/21—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being formed by alternating adhesive areas of different nature

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 first adhesive layer containing the foaming agent particles in the structural adhesive tape is foamed in the foaming agent particles. After that, it is kept away from the object to be bonded, and the second adhesive layer containing no foaming agent particles remains adhered to the object to be bonded, so that the viscosity of the structural adhesive tape after foaming can be accurately controlled.
  • Another object of the present invention is to provide a structural adhesive tape and a preparation method thereof, wherein the structural adhesive tape has high viscosity consistency with the object to be bonded, is easy to be mass-produced, and solves the foaming agent in the conventional adhesive tape.
  • 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 paper comprising a first glue The adhesive layer and the first substrate.
  • the first substrate is located on a side of the structural adhesive tape that is away from the object to be bonded.
  • the first adhesive layer includes: a first adhesive for bonding to the object to be bonded and a surface of the first adhesive adhered to the object to be bonded is a first surface; and a foaming agent The particles are distributed in the first adhesive.
  • a first groove is disposed in the first adhesive layer, the first groove is filled with a second adhesive layer, and the second adhesive layer is used for bonding to the object to be bonded and includes the second glue
  • the adhesive does not contain the blowing agent particles, and the surface of the second adhesive layer away from the first substrate is the second surface.
  • Foaming agent particles in an adhesive layer are foamed, wherein a portion of the blowing agent particles are foamed to expose the first surface and a sum of sectional areas of the partial blowing agent particles along the first surface is not less than the first surface 70% of the area.
  • the present invention provides a method for preparing a structural adhesive tape for preparing the structural adhesive tape according to one aspect of the present invention, comprising the steps of: disposing a first adhesive, a foaming agent particle, and The first solvent is stirred to form a slurry of the first adhesive layer; the second adhesive and the second solvent are stirred to form a slurry of the second adhesive layer; and the slurry of the first adhesive layer is set On the first substrate, and providing a first groove in the first adhesive layer, heating to a first temperature for drying to remove the first solvent, the first temperature being lower than the foaming agent particles The bubble temperature is ensured that the foaming agent particles are distributed on the first adhesive, so that the first adhesive can be adhered to the object to be bonded after drying, and the first adhesive is bonded to the object to be bonded
  • the upper surface is a first surface; a slurry of the second adhesive layer is disposed at a corresponding position of the first groove, heated to a second temperature for drying to remove the second solvent,
  • the first adhesive layer containing the foaming agent particles in the structural adhesive tape of the present invention remains detached from the object to be bonded after the foaming agent particles are foamed, and the second adhesive layer containing no foaming agent particles remains Since the bonded object is not bonded, the viscosity of the structural adhesive tape after foaming can be accurately controlled.
  • the structural adhesive paper of the invention has extremely high viscosity consistency with the object to be bonded, and is easy to be mass-produced, and solves the problem that the viscosity of the foaming agent in the conventional adhesive paper is severely fluctuated after foaming.
  • 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 another perspective view of a structural adhesive tape according to the present invention.
  • Figure 7 is a front elevational view of Figure 5;
  • Figure 8 is another front view of Figure 5;
  • Figure 9 is a front elevational view of Figure 6;
  • Figure 10 is another front view of Figure 6;
  • Figure 11 is a top plan view of the structural adhesive tape according to the present invention after removing the first substrate;
  • Figure 12 is another top plan view of the structural adhesive tape according to the present invention after removing the first substrate
  • Figure 13 is still another plan view of the structural adhesive tape according to the present invention after removing the first substrate
  • Figure 14 is a schematic illustration of an alternative embodiment of a structural adhesive tape in accordance with the present invention.
  • Figure 15 is a schematic illustration of another alternative embodiment of a structural adhesive tape in accordance with the present invention.
  • Figure 16 is a schematic illustration of yet another alternative embodiment of a structural adhesive tape in accordance with the present invention.
  • Figure 17 is a schematic view showing still another alternative embodiment of the structural adhesive tape according to the present invention.
  • FIG. 18A to 18B are schematic views of an embodiment of a prior art adhesive tape, wherein FIG. 18A shows a schematic view of the foaming agent before foaming, and FIG. 18B shows a schematic view of the foaming agent after foaming;
  • FIG. 19A to 19B are schematic views showing another embodiment of the prior art adhesive tape, wherein FIG. 19A shows a schematic view before foaming of the foaming agent, and FIG. 19B shows a schematic view after foaming of the foaming agent;
  • FIGS. 20A to 20B are schematic views showing still another embodiment of the prior art adhesive tape, wherein Fig. 20A shows a schematic view before foaming of the foaming agent, and Fig. 20B shows a schematic view after foaming of the foaming agent.
  • the structural adhesive sheet 1 includes a first adhesive layer 11 and a first substrate 12.
  • the first substrate 12 is located on the side of the structural adhesive tape 1 away from the object to be bonded.
  • the first adhesive layer 11 includes: a first adhesive 111 for bonding to the object to be bonded and the surface of the first adhesive 111 adhered to the object to be bonded is the first surface 111S; And the blowing agent particles 112 are distributed on the first adhesive 111.
  • the first adhesive layer 11 is provided with a first recess 11R, the first recess 11R is filled with a second adhesive layer 13, and the second adhesive layer 13 is used for bonding to the object to be bonded.
  • the structural adhesive tape 1 After the structural adhesive tape 1 is bonded to the object to be bonded, when the heat receiving temperature of the structural adhesive tape 1 is greater than the foaming temperature of the foaming agent particles 112, the second adhesive layer 13 remains bonded to the object to be bonded. Without breaking, the blowing agent particles 112 in the first adhesive layer 11 are foamed, wherein a portion of the blowing agent particles 112 are foamed to expose the first surface 111S and the partial blowing agent particles 112 are along the first surface 111S. The sum of the cross-sectional areas is not less than 70% of the area of the first surface 111S.
  • the first adhesive layer 11 containing the blowing agent particles 112 in the structural adhesive sheet 1 remains adhered to the bonded object after the foaming agent particles 112 are foamed.
  • the detachment that is, the first adhesive 111 is detached from the object to be bonded
  • the second adhesive layer 13 containing no foaming agent particles remains adhered to the object to be bonded, so that the foamed portion can be accurately controlled.
  • the foaming agent particles 112 of the structural adhesive sheet 1 may be exposed on the first surface 111S before being foamed, or may not be exposed on the first surface 111S, as long as it is ensured
  • the foaming agent particles 112 are exposed to the first surface 111S after foaming and the sum of the sectional areas of the partial blowing agent particles 112 along the first surface 111S is not less than 70% of the area of the first surface 111S.
  • the foaming agent particles 112 of the structural adhesive paper 1 are not exposed to the first surface 111S before foaming.
  • the foaming agent particles 112 of the structural adhesive paper 1 are before foaming. It is exposed on the first surface 111S.
  • the thickness of the second adhesive layer 13 along the thickness direction T of the structural adhesive tape 1 may be smaller than that of the first adhesive layer 11 along the structural adhesive.
  • the thickness of the paper 1 in the thickness direction T. may also be equal to the thickness of the first adhesive layer 11 along the thickness direction T of the structural adhesive sheet 1.
  • the thickness of the second adhesive layer 13 along the thickness direction T of the structural adhesive tape 1 may also be slightly larger than the thickness of the first adhesive layer 11 along the thickness direction T of the structural adhesive tape 1.
  • the thickness of the second adhesive layer 13 along the thickness direction T of the structural adhesive tape 1 is equal to the thickness of the first adhesive layer 11 along the thickness direction T of the structural adhesive tape 1, that is, the thickness of the first groove 11R The direction T penetrates the first adhesive layer 11.
  • the sum of the sectional areas of the partial blowing agent particles 112 along the first surface 111S is equal to the area of the first surface 111S to secure the first adhesive 111. After the foaming agent particles 112 are foamed, they are kept detached from the object to be bonded, and the structural adhesive paper 1 is easily peeled off.
  • the surface of the second adhesive layer 13 remote from the first substrate 12 is the second surface 13S, and the area of the second surface 13S is 1 mm 2 to 100 mm 2 . .
  • the area of the second surface 13S is 1 mm 2 to 10 mm 2 .
  • the particle size of the blowing agent particles 112 is from 5 ⁇ m to 30 ⁇ m.
  • the blowing agent particles 112 are physical blowing agents and/or chemical blowing agents.
  • the physical foaming agent is an alkane long chain series foaming agent.
  • the physical blowing agent is selected from one or more of an isopentane blowing agent, an isobutane blowing agent, and a cyclopentane blowing agent.
  • the chemical blowing agent is selected from the group consisting of azodicarbonamide (AC), azobisisobutyronitrile (AIBN), N,N-dinitrosopentamethylenetetramine (DPT), 4,4'- Oxygen One or more of phenyl sulfonyl hydrazide (OBSH) and p-toluenesulfonyl hydrazide (TSH).
  • AC azodicarbonamide
  • AIBN azobisisobutyronitrile
  • DPT N,N-dinitrosopentamethylenetetramine
  • OBSH phenyl sulfonyl hydrazide
  • TSH p-toluenesulfonyl hydrazide
  • the first substrate 12 is selected from the group consisting of polyethylene terephthalate (PET).
  • the first adhesive 111 is selected from one or more of an acrylate type adhesive and a urethane adhesive.
  • the acrylate type adhesive may preferably be 2-ethyl methacrylate (EMA).
  • the second adhesive is one or more selected from the group consisting of an acrylate type adhesive and a urethane adhesive.
  • the acrylate type adhesive may preferably be 2-ethyl methacrylate (EMA).
  • 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 one or more of an aliphatic polyamine, an alicyclic polyamine, a polyamide (preferably a low molecular polyamide), a modified aromatic amine, and an isocyanate.
  • the first adhesive layer 11 has a thickness of 30 ⁇ m to 50 ⁇ m.
  • the first base material 12 has a thickness of 15 ⁇ m to 36 ⁇ m.
  • the position of the first groove 11R in the first adhesive layer 11 is not limited.
  • the first recess 11R is located at the center of the first adhesive layer 11.
  • the first groove 11R penetrates the first adhesive layer 11 in the longitudinal direction L.
  • the first recess 11R penetrates the first adhesive layer 11 in the width direction W.
  • the shape of the first groove 11R is not limited, and preferably, the first groove 11R has a rectangular shape.
  • 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:
  • Preparing a slurry of the first adhesive layer 11 stirring the first adhesive 111, the blowing agent particles 112 and the first solvent into a slurry of the first adhesive layer 11;
  • Preparing a slurry of the second adhesive layer 13 stirring the second adhesive and the second solvent to form a slurry of the second adhesive layer 13;
  • the first adhesive layer 11 is disposed: the slurry of the first adhesive layer 11 is disposed on the first substrate 12, and the first groove 11R is disposed in the first adhesive layer 11 and heated to the first The temperature is dried to remove the first solvent, the first temperature being lower than the foaming temperature of the blowing agent particles 112 and ensuring that the blowing agent particles 112 are distributed on the first adhesive 111 so as to facilitate the drying of the first adhesive
  • the adhesive 111 can be adhered to the object to be bonded, and the surface of the first adhesive 111 adhered to the object to be bonded is the first surface 111S;
  • the second adhesive layer 13 is disposed: the slurry of the second adhesive layer 13 is disposed at a corresponding position of the first groove 11R, heated to a second temperature for drying to remove the second solvent, and the second temperature is low
  • the foaming temperature of the foaming agent particles 112 is such that the second adhesive layer 13 can be adhered to the object to be bonded after drying;
  • Curing heating to a third temperature for a period of time to make the first adhesive layer 11 and the second adhesive layer 13
  • the third temperature is lower than the foaming temperature of the blowing agent particles 112 to complete the preparation of the structural adhesive paper 1.
  • the second adhesive layer 13 remains bonded to the object to be bonded.
  • the blowing agent particles 112 in the first adhesive layer 11 are foamed, wherein a portion of the blowing agent particles 112 are foamed to expose the first surface 111S and the partial blowing agent particles 112 are along the first surface 111S.
  • the sum of the cross-sectional areas is not less than 70% of the area of the first surface 111S.
  • the groove is reserved by directly controlling the slurry of the first adhesive layer 11 to be coated on the first substrate 12.
  • the groove is formed by providing a mask on the first substrate 12, and then applying the slurry of the first adhesive layer 11 to the first
  • the mask 12 is formed on the region other than the mask to be removed, and finally the mask is removed.
  • the residual amount of the first solvent accounts for the slurry of the first adhesive layer 11.
  • the ratio of total weight is less than 1%.
  • 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 1%.
  • the first temperature is from 75 ° C to 85 ° C.
  • the second temperature is from 75 ° C to 85 ° C.
  • the third temperature is from 40 ° C to 45 ° C.
  • the slurry of the first adhesive layer 11 is disposed in an unrestricted manner, and can be blade coating, extrusion coating, spray coating, gravure Printing, etc., preferably gravure printing and doctor blade coating, in order to accurately control the size of the groove, thereby accurately controlling the area of the second adhesive layer 13 containing no blowing agent particles, and achieving accurate control of the structural adhesive after foaming
  • the foaming agent particles are extremely likely to block the gravure mesh holes, the sizing is leaked.
  • the distribution of the foaming agent particles in the adhesive is uneven, resulting in uneven foaming, the product is extremely unstable, and the scrapping rate can reach 50%.
  • the thickness of one coating is limited, and the maximum thickness is 40 ⁇ m, and the application range of the product is severely limited. Therefore, blade coating is further preferred.
  • the first recess 11R in the first adhesive layer 11 penetrates the first adhesive layer 11 in the thickness direction T, and the first substrate 12 is disposed through the thickness direction T.
  • a second groove 12R, and each groove 12R in the first substrate 12 is aligned and communicated with a corresponding one of the first grooves 11R of the first adhesive layer 11 in the thickness direction T, in the first substrate 12
  • the second recess 12R is filled with a second adhesive layer 13.
  • the number of the first grooves 11R in the first adhesive layer 11 is at least one.
  • the number of the second grooves 12R in the first substrate 12 is at least one.
  • the number of the first grooves 11R in the first adhesive layer 11 is the same as the number of the second grooves 12R in the first substrate 12.
  • the shape of the second groove 12R is not limited. Further preferably, the second groove 12R has a rectangular shape.
  • the structural adhesive tape 1 further includes a third adhesive layer 15 disposed on a surface of the first substrate 12 facing away from the first adhesive layer 11, including a third adhesive. Adhesive but no foaming agent particles.
  • the third adhesive layer 15 may have a thickness of 10 ⁇ m to 40 ⁇ m.
  • the third adhesive is selected from one or more of an acrylate type adhesive and a urethane adhesive.
  • the acrylate type adhesive may preferably be 2-ethyl methacrylate (EMA).
  • EMA 2-ethyl methacrylate
  • the material of the second adhesive and the third adhesive may be the same.
  • a curing agent may also be included in the third adhesive layer 15.
  • 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 polyamide (preferably a low molecular polyamide), a modified aromatic amine, and an isocyanate.
  • the structural adhesive sheet 1 further includes a second substrate 14 disposed on a surface of the third adhesive layer 15 facing away from the first substrate 12.
  • the second substrate 14 may be selected from polyethylene terephthalate.
  • the second substrate 14 may have a thickness of 15 ⁇ m to 36 ⁇ m.
  • the structural adhesive sheet 1 further includes a second substrate 14 disposed on a surface of the first substrate 12 facing away from the first adhesive layer 11.
  • the second substrate 14 may be selected from polyethylene terephthalate.
  • the second substrate 14 may have a thickness of 15 ⁇ m to 36 ⁇ m.
  • the preparation method of the alternative embodiment shown in FIG. 14 further includes: before the ripening step:
  • the second groove 12R is disposed such that the first substrate 12 is disposed through the second groove 12R in the thickness direction T, and each of the second grooves 12R in the first substrate 12 corresponds to the first adhesive layer 11 One of the first grooves 11R is aligned and connected in the thickness direction T;
  • a slurry of the second adhesive layer 13 is disposed at a corresponding position of the second recess 12R, heated and dried to remove the second solvent, and heated and dried.
  • the temperature is lower than the foaming temperature of the blowing agent particles 112, so that the second groove 12R in the first substrate 12 is filled with the second adhesive layer 13.
  • each of the second recesses 12R in the first substrate 12 and the corresponding one of the first recesses 11R in the first adhesive layer 11 are formed by die-cutting punching.
  • the preparation method of the alternative embodiment shown in FIG. 15 further includes: before the ripening step:
  • the second groove 12R is disposed such that the first substrate 12 is disposed through the second groove 12R in the thickness direction T, and each of the second grooves 12R in the first substrate 12 corresponds to the first adhesive layer 11 One of the first grooves 11R is aligned and connected in the thickness direction T;
  • a slurry of the second adhesive layer 13 is disposed at a corresponding position of the second recess 12R, heated and dried to remove the second solvent, and heated and dried.
  • the temperature is lower than the foaming temperature of the foaming agent particles 112, so that the second recess 12R in the first substrate 12 is filled with the second adhesive layer 13;
  • Preparing a slurry of the third adhesive layer 15 stirring the third adhesive and the third solvent to form a slurry of the third adhesive layer 15;
  • the third adhesive layer 15 is disposed: the slurry of the third adhesive layer 15 is disposed on the surface of the first substrate 12 facing away from the first adhesive layer 11, heated and dried to remove the third solvent, and heated and baked.
  • the dry temperature is lower than the foaming temperature of the blowing agent particles 112.
  • each of the second recesses 12R in the first substrate 12 and the corresponding one of the first recesses 11R in the first adhesive layer 11 are formed by die-cutting punching.
  • the slurry of the third adhesive layer 15 and the slurry of the second adhesive layer 13 may be the same slurry.
  • a third adhesive layer 15 is disposed, a second adhesive layer 13 is disposed in the second recess 12R, and a second adhesive layer 13 is disposed in the first recess 11R.
  • the agent layer 15 is completed together. This is done, for example, by secondary knife coating once.
  • the preparation method of the alternative embodiment shown in FIG. 16 further includes: before the ripening step:
  • the second groove 12R is disposed such that the first substrate 12 is disposed through the second groove 12R in the thickness direction T, and each of the second grooves 12R in the first substrate 12 corresponds to the first adhesive layer 11 One of the first grooves 11R is aligned and connected in the thickness direction T;
  • a slurry of the second adhesive layer 13 is disposed at a corresponding position of the second recess 12R, heated and dried to remove the second solvent, and heated and dried.
  • the temperature is lower than the foaming temperature of the foaming agent particles 112, so that the second recess 12R in the first substrate 12 is filled with the second adhesive layer 13;
  • Preparing a slurry of the third adhesive layer 15 stirring the third adhesive and the third solvent to form a slurry of the third adhesive layer 15;
  • the third adhesive layer 15 is disposed: the slurry of the third adhesive layer 15 is disposed on the surface of the first substrate 12 facing away from the first adhesive layer 11, heated and dried to remove the third solvent, and heated and baked.
  • the dry temperature is lower than the foaming temperature of the blowing agent particles 112;
  • the second substrate 14 is disposed: a second substrate 14 is disposed on a surface of the third adhesive layer 15 facing away from the first substrate 12; and the curing step further causes the third adhesive layer 15 to be cured.
  • each of the second recesses 12R in the first substrate 12 and the corresponding one of the first recesses 11R in the first adhesive layer 11 are formed by die-cutting punching.
  • the slurry of the third adhesive layer 15 and the slurry of the second adhesive layer 13 may be the same slurry.
  • a third adhesive layer 15 is disposed, a second adhesive layer 13 is disposed in the second recess 12R, and a second adhesive layer 13 is disposed in the first recess 11R.
  • the agent layer 15 is completed together. This is done, for example, by secondary knife coating once.
  • the preparation method of the alternative embodiment shown in FIG. 17 further includes: before the ripening step:
  • the second groove 12R is disposed such that the first substrate 12 is disposed through the second groove 12R in the thickness direction T, and each of the second grooves 12R in the first substrate 12 corresponds to the first adhesive layer 11 One of the first grooves 11R is aligned and connected in the thickness direction T;
  • a slurry of the second adhesive layer 13 is disposed at a corresponding position of the second recess 12R, heated and dried to remove the second solvent, and heated and dried.
  • the temperature is lower than the foaming temperature of the foaming agent particles 112, so that the second recess 12R in the first substrate 12 is filled with the second adhesive layer 13;
  • the second substrate 14 is disposed: a second substrate 14 is disposed on a surface of the first substrate 12 facing away from the first adhesive layer 11.
  • each of the second recesses 12R in the first substrate 12 and the corresponding one of the first recesses 11R in the first adhesive layer 11 are formed by die-cutting punching.
  • the first recess 11R and the second recess 12R are formed at one time by die-cut punching, whereby the use of the intaglio can be avoided and the resulting structural adhesive sheet properties are more stable.
  • the foaming agent cyclopentane (foaming temperature is 120 ° C ⁇ 130 ° C) is filtered through a 150 mesh sieve at room temperature, and then stirred with EMA and ethyl acetate at 40 rpm to 60 rpm to prepare a first adhesive. The slurry of the layer was stirred for 30 min.
  • the EMA and toluene were stirred at a temperature of 40 rpm to 60 rpm to prepare a slurry of the second adhesive layer at room temperature, and the stirring time was 30 min.
  • a mask is disposed on the substrate PET (thickness: 19 ⁇ m), and the mask area is set to have an area of 5 mm ⁇ 5 mm, and the thickness of the mask is the same as that of the first adhesive layer, and then the first adhesive is used.
  • the slurry of the layer is set on the PET by means of secondary blade coating, and the coating thickness is controlled to be 40 ⁇ m to form a first roll, which is heated to an oven temperature of 75 ° C, and the first roll speed control is 10 m/min. 12m/min, baking time 2min to remove ethyl acetate (residual amount less than 1%):
  • 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 foaming agent cyclopentane (foaming temperature is 120 ° C ⁇ 130 ° C) is filtered through a 150 mesh sieve at room temperature, and then stirred with EMA and ethyl acetate at 40 rpm to 60 rpm to prepare a first adhesive. The slurry of the layer was stirred for 30 min.
  • the EMA and toluene were stirred at a temperature of 40 rpm to 60 rpm to prepare a slurry of the second adhesive layer at room temperature, and the stirring time was 30 min.
  • the slurry of the first adhesive layer was set on a release film (thickness: 50 ⁇ m) by knife coating, and the coating thickness was controlled to be 40 ⁇ m, and then set on the other side of the slurry of the first adhesive layer.
  • the first substrate PET (thickness: 19 ⁇ m)
  • the first roll is produced, heated to an oven temperature of 75 ° C
  • the first roll speed is controlled to be 10 m / min to 12 m / min
  • the baking time is 2 min to remove ethyl acetate (residual amount is less than 1%).
  • a first groove and a second groove are formed in the first substrate and the first adhesive layer, respectively, and the groove has a size of 5 mm ⁇ 5 mm.
  • the punched release film is removed and another complete release film is placed in place to attach it to the first adhesive layer.
  • the slurry of the second adhesive layer is disposed on the surface of the first substrate by a doctor blade coating, and is filled with the first groove and the second groove, and the adhesive located on the surface of the first substrate is used as The third adhesive layer was formed, and the thickness of the third adhesive layer was 10 ⁇ m.
  • a second substrate PET (thickness: 19 ⁇ m) was placed on the surface of the third adhesive layer, heated to an oven temperature of 75 ° C, and baked for 2 min to remove toluene (residual amount less than 1%).
  • the mixture was heated to 45 ° C for aging, and the aging time was 60 h.
  • the release film was removed 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 EMA 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.
  • Example 1 The structural adhesive sheets of Example 1, Example 2 and Comparative Example 1 were bonded to a current collector, baked in an oven at 125 ° C for 20 s to foam the cyclopentane, and then the structural adhesive paper was removed from the high iron tensile machine. Peel off the current collector to test the peel force between the structural adhesive tape and the current collector.
  • the gravure coating was eliminated in the preparation process of Example 2, which avoids the problem of product instability caused by gravure coating; by adding a single die-cutting punch, precise digging can be performed at a specified position of the first adhesive layer.
  • the groove is used to accurately control the viscosity of the structural adhesive tape after foaming; the second blank blade coating can accurately fill the groove blank, and a thin layer of glue is applied on the surface of the first substrate.

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  • Adhesive Tapes (AREA)

Abstract

本发明提供一种结构胶纸及其制备方法。所述结构胶纸包括第一胶黏剂层以及第一基材。第一胶黏剂层包括：第一胶黏剂，用于粘接在被粘接对象上；以及发泡剂颗粒。第一胶黏剂层中设置有第一凹槽，第一凹槽的位置填充有第二胶黏剂层，第二胶黏剂层用于粘接在被粘接对象上且包括第二胶黏剂但不含发泡剂颗粒。本发明的结构胶纸中含有发泡剂颗粒的第一胶黏剂层在发泡剂颗粒发泡后保持与被粘结对象脱离，不含发泡剂颗粒的第二胶黏剂层保持与被粘接对象粘接不脱离，因此能准确控制发泡后的结构胶纸的粘性。

Description

结构胶纸及其制备方法 技术领域
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。
背景技术
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18A和图18B，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19A和图19B，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20A和图20B，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。
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。
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。
发明内容
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，所述结构胶纸中含有发泡剂颗粒的第一胶黏剂层在发泡剂颗粒发泡后保持与被粘结对象脱离，不含发泡剂颗粒的第二胶黏剂层保持与被粘接对象粘接不脱离，因此能准确控制发泡后的结构胶纸的粘性。
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。
本发明的又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。
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 黏剂层以及第一基材。第一基材位于结构胶纸的远离被粘接对象的一侧。第一胶黏剂层包括：第一胶黏剂，用于粘接在被粘接对象上且第一胶黏剂的粘接在被粘接对象上的表面为第一表面；以及发泡剂颗粒，分布于第一胶黏剂。第一胶黏剂层中设置有第一凹槽，第一凹槽的位置填充有第二胶黏剂层，第二胶黏剂层用于粘接在被粘接对象上且包括第二胶黏剂但不含发泡剂颗粒，且第二胶黏剂层的远离第一基材的表面为第二表面。在结构胶纸粘接在被粘接对象上之后，当结构胶纸的受热温度大于发泡剂颗粒的发泡温度时，第二胶黏剂层保持与被粘接对象粘接不脱离，第一胶黏剂层中的发泡剂颗粒发泡，其中，部分发泡剂颗粒发泡后露出第一表面且所述部分发泡剂颗粒沿第一表面的截面积的总和不小于第一表面的面积的70％。
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、发泡剂颗粒以及第一溶剂搅拌制成第一胶黏剂层的浆料；将第二胶黏剂以及第二溶剂搅拌制成第二胶黏剂层的浆料；将第一胶黏剂层的浆料设置于第一基材上，且在第一胶黏剂层中设置有第一凹槽，加热至第一温度进行烘干以除去第一溶剂，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一胶黏剂，以便于烘干后第一胶黏剂能够粘接在被粘接对象上，且第一胶黏剂的粘接在被粘接对象上的表面为第一表面；在第一凹槽的对应位置设置第二胶黏剂层的浆料，加热至第二温度进行烘干以除去第二溶剂，所述第二温度低于发泡剂颗粒的发泡温度，以便于烘干后第二胶黏剂层能够粘接在被粘接对象上且第二胶黏剂层的远离第一基材的表面为第二表面；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，所述第三温度低于发泡剂颗粒的发泡温度，完成结构胶纸的制备；在结构胶纸粘接在被粘接对象上之后，当结构胶纸的受热温度大于发泡剂颗粒的发泡温度时，第二胶黏剂层保持与被粘接对象粘接不脱离，第一胶黏剂层中的发泡剂颗粒发泡，其中，部分发泡剂颗粒发泡后露出第一表面且所述部分发泡剂颗粒沿第一表面的截面积的总和不小于第一表面的面积的70％。
相对于现有技术，本发明的有益效果为：
本发明的结构胶纸中含有发泡剂颗粒的第一胶黏剂层在发泡剂颗粒发泡后保持与被粘结对象脱离，不含发泡剂颗粒的第二胶黏剂层保持与被粘接对象粘接不脱离，因此可准确控制发泡后的结构胶纸的粘性。
本发明的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。
附图说明
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；
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；
图3为根据本发明的结构胶纸涂布活性物质层的立体图；
图4为根据本发明的结构胶纸剥离后的立体图；
图5为根据本发明的结构胶纸的一立体图；
图6为根据本发明的结构胶纸的另一立体图；
图7为图5的一前视图；
图8为图5的另一前视图；
图9为图6的一前视图；
图10为图6的另一前视图；
图11为根据本发明的结构胶纸移除第一基材后的一俯视图；
图12为根据本发明的结构胶纸移除第一基材后的另一俯视图；
图13为根据本发明的结构胶纸移除第一基材后的又一俯视图；
图14为根据本发明的结构胶纸的一替代实施例的一示意图；
图15为根据本发明的结构胶纸的另一替代实施例的一示意图；
图16为根据本发明的结构胶纸的又一替代实施例的一示意图；
图17为根据本发明的结构胶纸的再一替代实施例的一示意图；
图18A至图18B为现有技术的胶纸的一实施例的一示意图，其中，图18A示出发泡剂发泡前的示意图，图18B示出发泡剂发泡后的示意图；
图19A至图19B为现有技术的胶纸的另一实施例的一示意图，其中，图19A示出发泡剂发泡前的示意图，图19B示出发泡剂发泡后的示意图；
图20A至图20B为现有技术的胶纸的又一实施例的一示意图，其中，图20A示出发泡剂发泡前的示意图，图20B示出发泡剂发泡后的示意图。
其中，附图标记说明如下：
1结构胶纸
11第一胶黏剂层
111第一胶黏剂
112发泡剂颗粒
111S第一表面
11R第一凹槽
12第一基材
12R第二凹槽
13第二胶黏剂层
13S第二表面
14第二基材
15第三胶黏剂层
2集流体
21预留区域
3活性物质层
W宽度方向
L长度方向
T厚度方向
1′基材
2′胶黏剂
21′发泡剂
具体实施方式
下面详细说明根据本发明的结构胶纸及其制备方法。
首先说明根据本发明第一方面的结构胶纸。
参照图3、图5至图10，根据本发明第一方面的结构胶纸1包括第一胶黏剂层11以及第一基材12。第一基材12位于结构胶纸1的远离被粘接对象的一侧。第一胶黏剂层11包括：第一胶黏剂111，用于粘接在被粘接对象上且第一胶黏剂111的粘接在被粘接对象上的表面为第一表面111S；以及发泡剂颗粒112，分布于第一胶黏剂111。第一胶黏剂层11中设置有第一凹槽11R，第一凹槽11R的位置填充有第二胶黏剂层13，第二胶黏剂层13用于粘接在被粘接对象上且包括第二胶黏剂但不含发泡剂颗粒。在结构胶纸1粘接在被粘接对象上之后，当结构胶纸1的受热温度大于发泡剂颗粒112的发泡温度时，第二胶黏剂层13保持与被粘接对象粘接不脱离，第一胶黏剂层11中的发泡剂颗粒112发泡，其中，部分发泡剂颗粒112发泡后露出第一表面111S且所述部分发泡剂颗粒112沿第一表面111S的截面积的总和不小于第一表面111S的面积的70％。
在根据本发明第一方面所述的结构胶纸1中，结构胶纸1中含有发泡剂颗粒112的第一胶黏剂层11在发泡剂颗粒112发泡后保持与被粘结对象脱离(即第一胶黏剂111与被粘结对象脱离)，不含发泡剂颗粒的第二胶黏剂层13保持与被粘接对象粘接不脱离，因此能准确控制发泡后的结构胶纸1的粘性。
在根据本发明第一方面所述的结构胶纸1中，结构胶纸1的发泡剂颗粒112在发泡前可以露出于第一表面111S，也可以不露出于第一表面111S，只要保证发泡后发泡剂颗粒112露出第一表面111S且所述部分发泡剂颗粒112沿第一表面111S的截面积的总和不小于第一表面111S的面积的70％即可。参照图7和图9，结构胶纸1的发泡剂颗粒112在发泡前未露出于第一表面111S，参照图8和图10，结构胶纸1的发泡剂颗粒112在发泡前露出于第一表面111S。
在根据本发明第一方面所述的结构胶纸1中，参照图6，第二胶黏剂层13沿结构胶纸1的厚度方向T的厚度可以小于第一胶黏剂层11沿结构胶纸1的厚度方向T的厚度。参照图5，第二胶黏剂层13沿结构胶纸1的厚度方向T的厚度也可以等于第一胶黏剂层11沿结构胶纸1的厚度方向T的厚度。此外，第二胶黏剂层13沿结构胶纸1的厚度方向T的厚度也可以略大于第一胶黏剂层11沿结构胶纸1的厚度方向T的厚度。优选地，第二胶黏剂层13沿结构胶纸1的厚度方向T的厚度等于第一胶黏剂层11沿结构胶纸1的厚度方向T的厚度，即，第一凹槽11R沿厚度方向T贯通第一胶黏剂层11。
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112沿第一表面111S的截面积的总和等于第一表面111S的面积，以保证第一胶黏剂111在发泡剂颗粒112发泡后与被粘接对象保持脱离，便于撕去结构胶纸1。
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13的远离第一基材12的表面为第二表面13S，第二表面13S的面积为1mm2～100mm2。优选地，第二表面13S的面积为1mm2～10mm2。
在根据本发明第一方面所述的结构胶纸1中，发泡剂颗粒112的粒径为5μm～30μm。
在根据本发明第一方面所述的结构胶纸1中，发泡剂颗粒112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。
在根据本发明第一方面所述的结构胶纸1中，第一基材12选自聚对苯二甲酸乙二醇酯(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111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2-甲基丙烯酸乙酯(EMA)。
在根据本发明第一方面所述的结构胶纸1中，第二胶黏剂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2-甲基丙烯酸乙酯(EMA)。
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，优选为脂肪族多胺、脂环族多胺、聚酰胺(优选为低分子聚酰胺)、改性芳胺、异氰酸酯中的一种或几种。
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30μm～50μm。
在根据本发明第一方面所述的结构胶纸1中，第一基材12的厚度为15μm～36μm。
在根据本发明第一方面所述的结构胶纸1中，第一凹槽11R在第一胶黏剂层11中的位置不受限制。参照图11，第一凹槽11R位于第一胶黏剂层11的中央。参照图12，第一凹槽11R沿长度方向L贯通第一胶黏剂层11。参照图13，第一凹槽11R沿宽度方向W贯通第一胶黏剂层11。
在根据本发明第一方面所述的结构胶纸1中，第一凹槽11R的形状不受限制，优选地，第一凹槽11R具有矩形形状。
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。
其次说明根据本发明第二方面的结构胶纸的制备方法。
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：
制备第一胶黏剂层11的浆料：将第一胶黏剂111、发泡剂颗粒112以及第一溶剂搅拌制成第一胶黏剂层11的浆料；
制备第二胶黏剂层13的浆料：将第二胶黏剂以及第二溶剂搅拌制成第二胶黏剂层13的浆料；
设置第一胶黏剂层11：将第一胶黏剂层11的浆料设置于第一基材12上，且在第一胶黏剂层11中设置第一凹槽11R，加热至第一温度进行烘干以除去第一溶剂，所述第一温度低于发泡剂颗粒112的发泡温度且保证发泡剂颗粒112分布于第一胶黏剂111，以便于烘干后第一胶黏剂111能够粘接在被粘接对象上，且第一胶黏剂111的粘接在被粘接对象上的表面为第一表面111S；
设置第二胶黏剂层13：在第一凹槽11R的对应位置设置第二胶黏剂层13的浆料，加热至第二温度进行烘干以除去第二溶剂，所述第二温度低于发泡剂颗粒112的发泡温度，以便于烘干后第二胶黏剂层13能够粘接在被粘接对象上；
熟化：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，所述第三温度低于发泡剂颗粒112的发泡温度，完成结构胶纸1的制备。
在结构胶纸1粘接在被粘接对象上之后，当结构胶纸1的受热温度大于发泡剂颗粒112的发泡温度时，第二胶黏剂层13保持与被粘接对象粘接不脱离，第一胶黏剂层11中的发泡剂颗粒112发泡，其中，部分发泡剂颗粒112发泡后露出第一表面111S且所述部分发泡剂颗粒112沿第一表面111S的截面积的总和不小于第一表面111S的面积的70％。
在根据本发明第二方面所述的结构胶纸1的制备方法中，凹槽通过直接控制第一胶黏剂层11的浆料在第一基材12上涂布而预留出。
在根据本发明第二方面所述的结构胶纸1的制备方法中，凹槽通过在第一基材12上设置掩膜，之后使第一胶黏剂层11的浆料涂布在第一基材12的除去掩膜之外的区域上以及最后将掩膜去除而形成。
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一溶剂后，第一溶剂的残余量占第一胶黏剂层11的浆料的总重量的比例低于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，加热至第二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℃。
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℃。
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40℃～45℃。
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，可为刮刀涂布、挤压涂布、喷涂、凹版印刷等，优选为凹版印刷以及刮刀涂布，以便于精确控制凹槽的大小，进而准确控制不含发泡剂颗粒的第二胶黏剂层13的面积，实现准确控制发泡后的结构胶纸1的粘性的目的。但是由于发泡剂颗粒极易堵住凹版网纹孔，导致上胶漏涂。且发泡剂颗粒在胶黏剂中的分布不均匀，导致发泡不均匀，产品极为不稳定，报废率可达50％。凹版印刷涂布时一次涂布的厚度受限，最大厚度为40μm，产品的应用范围严重受限。因此进一步优选为刮刀涂布。
接下来说明根据本发明第一方面的结构胶纸的替代实施例。
参照图14，在一替代实施例中，第一胶黏剂层11中的第一凹槽11R沿厚度方向T贯通第一胶黏剂层11，第一基材12沿厚度方向T贯通设置有第二凹槽12R，且第一基材12中的各凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R沿厚度方向T对齐且连通，第一基材12中的第二凹槽12R内填充有第二胶黏剂层13。
优选地，第一胶黏剂层11中的第一凹槽11R的数量为至少一个。第一基材12中的第二凹槽12R的数量为至少一个。第一胶黏剂层11中的第一凹槽11R的数量与第一基材12中的第二凹槽12R的数量相同。
优选地，第二凹槽12R的形状不受限制。进一步优选地，第二凹槽12R具有矩形形状。
参照图15，在另一替代实施例中，结构胶纸1还包括：第三胶黏剂层15，设置于第一基材12的背离第一胶黏剂层11的表面，包括第三胶黏剂但不含发泡剂颗粒。
优选地，第三胶黏剂层15的厚度可为10μm～40μm。第三胶黏剂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2-甲基丙烯酸乙酯(EMA)。优选地，第二胶黏剂与第三胶黏剂的材质可相同。
优选地，第三胶黏剂层15中还可包括固化剂。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、聚酰胺(优选为低分子聚酰胺)、改性芳胺、异氰酸酯中的一种或几种。
参照图16，在又一替代实施例中，结构胶纸1还包括：第二基材14，设置于第三胶黏剂层15的背离第一基材12的表面。
优选地，第二基材14可选自聚对苯二甲酸乙二醇酯。第二基材14的厚度可为15μm～36μm。
参照图17，在再一替代实施例中，结构胶纸1还包括：第二基材14，设置于第一基材12的背离第一胶黏剂层11的表面。
优选地，第二基材14可选自聚对苯二甲酸乙二醇酯。第二基材14的厚度可为15μm～36μm。
接下来说明根据本发明第一方面的结构胶纸的替代实施例的制备方法。
与根据本发明第一方面的结构胶纸的制备方法相比，图14示出的替代实施例的制备方法在熟化步骤之前还包括：
设置第二凹槽12R：使第一基材12沿厚度方向T贯通设置有第二凹槽12R，且第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R沿厚度方向T对齐且连通；
在第二凹槽12R内填充第二胶黏剂层13：在第二凹槽12R的对应位置设置第二胶黏剂层13的浆料，加热烘干以除去第二溶剂，加热烘干的温度低于发泡剂颗粒112的发泡温度，使第一基材12中的第二凹槽12R内填充有第二胶黏剂层13。
优选地，第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R通过模切冲孔一起形成。
与根据本发明第一方面的结构胶纸的制备方法相比，图15示出的替代实施例的制备方法在熟化步骤之前还包括：
设置第二凹槽12R：使第一基材12沿厚度方向T贯通设置有第二凹槽12R，且第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R沿厚度方向T对齐且连通；
在第二凹槽12R内填充第二胶黏剂层13：在第二凹槽12R的对应位置设置第二胶黏剂层13的浆料，加热烘干以除去第二溶剂，加热烘干的温度低于发泡剂颗粒112的发泡温度，使第一基材12中的第二凹槽12R内填充有第二胶黏剂层13；
制备第三胶黏剂层15的浆料：将第三胶黏剂以及第三溶剂搅拌制成第三胶黏剂层15的浆料；
设置第三胶黏剂层15：第三胶黏剂层15的浆料设置在第一基材12的背离第一胶黏剂层11的表面上，加热烘干以除去第三溶剂，加热烘干的温度低于发泡剂颗粒112的发泡温度。
优选地，第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R通过模切冲孔一起形成。
优选地，第三胶黏剂层15的浆料和第二胶黏剂层13的浆料可为同一浆料。
优选地，设置第三胶黏剂层15、在第二凹槽12R内设置第二胶黏剂层13、在第一凹槽11R内设置第二胶黏剂层13均在设置第三胶黏剂层15时一起完成。例如通过二次刮刀涂布一次完成。
与根据本发明第一方面的结构胶纸的制备方法相比，图16示出的替代实施例的制备方法在熟化步骤之前还包括：
设置第二凹槽12R：使第一基材12沿厚度方向T贯通设置有第二凹槽12R，且第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R沿厚度方向T对齐且连通；
在第二凹槽12R内填充第二胶黏剂层13：在第二凹槽12R的对应位置设置第二胶黏剂层13的浆料，加热烘干以除去第二溶剂，加热烘干的温度低于发泡剂颗粒112的发泡温度，使第一基材12中的第二凹槽12R内填充有第二胶黏剂层13；
制备第三胶黏剂层15的浆料：将第三胶黏剂以及第三溶剂搅拌制成第三胶黏剂层15的浆料；
设置第三胶黏剂层15：第三胶黏剂层15的浆料设置在第一基材12的背离第一胶黏剂层11的表面上，加热烘干以除去第三溶剂，加热烘干的温度低于发泡剂颗粒112的发泡温度；
设置第二基材14：在第三胶黏剂层15的背离第一基材12的表面设置第二基材14；且熟化步骤还使得第三胶黏剂层15熟化。
优选地，第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R通过模切冲孔一起形成。
优选地，第三胶黏剂层15的浆料和第二胶黏剂层13的浆料可为同一浆料。
优选地，设置第三胶黏剂层15、在第二凹槽12R内设置第二胶黏剂层13、在第一凹槽11R内设置第二胶黏剂层13均在设置第三胶黏剂层15时一起完成。例如通过二次刮刀涂布一次完成。
与根据本发明第一方面的结构胶纸的制备方法相比，图17示出的替代实施例的制备方法在熟化步骤之前还包括：
设置第二凹槽12R：使第一基材12沿厚度方向T贯通设置有第二凹槽12R，且第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R沿厚度方向T对齐且连通；
在第二凹槽12R内填充第二胶黏剂层13：在第二凹槽12R的对应位置设置第二胶黏剂层13的浆料，加热烘干以除去第二溶剂，加热烘干的温度低于发泡剂颗粒112的发泡温度，使第一基材12中的第二凹槽12R内填充有第二胶黏剂层13；
设置第二基材14：在第一基材12的背离第一胶黏剂层11的表面设置第二基材14。
优选地，第一基材12中的各第二凹槽12R与第一胶黏剂层11中对应的一个第一凹槽11R通过模切冲孔一起形成。
在本发明的替代实施例中，第一凹槽11R和第二凹槽12R通过模切冲孔一次形成，由此可以避免使用凹版，得到的结构胶纸性能更稳定。
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。
实施例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EMA、乙酸乙酯在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。
室温环境下，将EMA以及甲苯在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。
在基材PET(厚度为19μm)上设置掩膜，设置的掩膜区域的面积大小为5mm×5mm，掩膜的厚度与第一胶黏剂层的浆料相同，之后将第一胶黏剂层的浆料采用二次刮刀涂布的方式设置于PET上，控制涂布厚度为40μm，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(残余量低于1％)：
除去掩膜，形成凹槽，并在凹槽的对应位置喷涂第二胶黏剂层的浆料，加热至烘箱温度为75℃，烘烤时间2min以除去甲苯(残余量低于1％)；
加热至45℃进行熟化，熟化时间为60h，完成结构胶纸的制备。
实施例2
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EMA、乙酸乙酯在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。
室温环境下，将EMA以及甲苯在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。
将第一胶黏剂层的浆料采用刮刀涂布的方式设置于离型膜(厚度为50μm)上，控制涂布厚度为40μm，之后在第一胶黏剂层的浆料的另一面设置第一基材PET(厚度为19μm)，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(残余量低于1％)。
之后通过一次模切冲孔，在第一基材和第一胶黏剂层中分别形成贯通的第一凹槽和第二凹槽，凹槽的尺寸为5mm×5mm。
将冲孔后的离型膜移除，并在原位置设置另一完整的离型膜，使之与第一胶黏剂层贴附。
采用刮刀涂布的方式将第二胶黏剂层的浆料设置于第一基材的表面，并填充满第一凹槽和第二凹槽，位于第一基材的表面的胶黏剂作为第三胶黏剂层形成，第三胶黏剂层的厚度为10μm。
在第三胶黏剂层的表面设置第二基材PET(厚度为19μm)，加热至烘箱温度为75℃，烘烤时间2min以除去甲苯(残余量低于1％)。
加热至45℃进行熟化，熟化时间为60h，移除离型膜，完成结构胶纸的制备。
对比例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EMA、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。
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。
下面说明结构胶纸的测试过程。
将实施例1、实施例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。
每组测试10个，测试结果如表1所示。
表1实施例1、实施例2与对比例1的测试结果
Figure PCTCN2016084021-appb-000001
从表1中可以看出，实施例1、实施例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。
实施例2的制备过程中取消了凹版印刷涂布，避免了凹版印刷涂布带来的产品不稳定问题；通过增加一次模切冲孔，可以在第一胶黏剂层的指定位置进行精确挖槽，进而准确控制发泡后的结构胶纸的粘性；通过进行二次刮刀涂布可以精确填充槽位空白，同时在第一基材表面涂布一层薄胶。

Claims (43)

  1. 一种结构胶纸(1)，包括：
    第一胶黏剂层(11)，包括：
    第一胶黏剂(111)，用于粘接在被粘接对象上且第一胶黏剂(111)的粘接在被粘接对象上的表面为第一表面(111S)；以及
    发泡剂颗粒(112)，分布于第一胶黏剂(111)；
    第一基材(12)，位于结构胶纸(1)的远离被粘接对象的一侧；
    其特征在于，
    第一胶黏剂层(11)中设置有第一凹槽(11R)，第一凹槽(11R)的位置填充有第二胶黏剂层(13)，第二胶黏剂层(13)用于粘接在被粘接对象上且包括第二胶黏剂但不含发泡剂颗粒；
    在结构胶纸(1)粘接在被粘接对象上之后，当结构胶纸(1)的受热温度大于发泡剂颗粒(112)的发泡温度时，第二胶黏剂层(13)保持与被粘接对象粘接不脱离，第一胶黏剂层(11)中的发泡剂颗粒(112)发泡，其中，部分发泡剂颗粒(112)发泡后露出第一表面(111S)且所述部分发泡剂颗粒(112)沿第一表面(111S)的截面积的总和不小于第一表面(111S)的面积的70％。
  2. 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)中的第一凹槽(11R)沿厚度方向(T)贯通第一胶黏剂层(11)。
  3. 根据权利要求2所述的结构胶纸(1)，其特征在于，
    第一基材(12)沿厚度方向(T)贯通设置有第二凹槽(12R)，且第一基材(12)中的各凹槽(12R)与第一胶黏剂层(11)中对应的一个第一凹槽(11R)沿厚度方向(T)对齐且连通，第一基材(12)中的第二凹槽(12R)内填充有第二胶黏剂层(13)。
  4. 根据权利要求3所述的结构胶纸(1)，其特征在于，
    第一胶黏剂层(11)中的第一凹槽(11R)的数量为至少一个；
    第一基材(12)中的第二凹槽(12R)的数量为至少一个。
  5. 根据权利要求3所述的结构胶纸(1)，其特征在于，
    结构胶纸(1)还包括：第三胶黏剂层(15)，设置于第一基材(12)的背离第一胶黏剂层(11)的表面，包括第三胶黏剂但不含发泡剂颗粒。
  6. 根据权利要求5所述的结构胶纸(1)，其特征在于，第三胶黏剂选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。
  7. 根据权利要求5所述的结构胶纸(1)，其特征在于，第三胶黏剂层(15)中还包括固化剂。
  8. 根据权利要求7所述的结构胶纸(1)，其特征在于，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。
  9. 根据权利要求5所述的结构胶纸(1)，其特征在于，第二胶黏剂与第三胶黏剂的材质相同。
  10. 根据权利要求5所述的结构胶纸(1)，其特征在于，第三胶黏剂层(15)的厚度为10μm～40μm。
  11. 根据权利要求5所述的结构胶纸(1)，其特征在于，
    结构胶纸(1)还包括：第二基材(14)，设置于第三胶黏剂层(15)的背离第一基材(12)的表面。
  12. 根据权利要求11所述的结构胶纸(1)，其特征在于，第二基材(14)选自聚对苯二甲酸乙二醇酯。
  13. 根据权利要求11所述的结构胶纸(1)，其特征在于，第二基材(14)的厚度为15μm～36μm。
  14. 根据权利要求3所述的结构胶纸(1)，其特征在于，
    结构胶纸(1)还包括：第二基材(14)，设置于第一基材(12)的背离第一胶黏剂层(11)的表面。
  15. 根据权利要求14所述的结构胶纸(1)，其特征在于，第二基材(14)选自聚对苯二甲酸乙二醇酯。
  16. 根据权利要求14所述的结构胶纸(1)，其特征在于，第二基材(14)的厚度为15μm～36μm。
  17. 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(112)沿第一表面(111S)的截面积的总和等于第一表面(111S)的面积。
  18. 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(13)的远离第一基材(12)的表面为第二表面(13S)，第二表面(13S)的面积为1mm2～100mm2，优选为1mm2～10mm2。
  19. 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(111)选自丙烯酸酯型胶黏剂、聚氨酯胶黏剂中的一种或几种。
  20. 根据权利要求1所述的结构胶纸(1)，其特征在于，第二胶黏剂选自丙烯酸酯型 胶黏剂、聚氨酯胶黏剂中的一种或几种。
  21. 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(112)选自物理发泡剂和/或化学发泡剂。
  22. 根据权利要求21所述的结构胶纸(1)，其特征在于，
    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、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。
  23. 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(112)的粒径为5μm～30μm。
  24. 根据权利要求1所述的结构胶纸(1)，其特征在于，第一基材(12)选自聚对苯二甲酸乙二醇酯。
  25. 根据权利要求1所述的结构胶纸(1)，其特征在于，第一基材(12)的厚度为15μm～36μm。
  26. 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30μm～50μm。
  27. 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。
  28. 根据权利要求27所述的结构胶纸(1)，其特征在于，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。
  29. 根据权利要求1-28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)。
  30. 一种结构胶纸(1)的制备方法，用于制备权利要求1所述的结构胶纸(1)，包括步骤：
    制备第一胶黏剂层(11)的浆料：将第一胶黏剂(111)、发泡剂颗粒(112)以及第一溶剂搅拌制成第一胶黏剂层(11)的浆料；
    制备第二胶黏剂层(13)的浆料：将第二胶黏剂以及第二溶剂搅拌制成第二胶黏剂层(13)的浆料；
    设置第一胶黏剂层(11)：将第一胶黏剂层(11)的浆料设置于第一基材(12)上，且在第一胶黏剂层(11)中设置有第一凹槽(11R)，加热至第一温度进行烘干以除去第一溶剂，所述第一温度低于发泡剂颗粒(112)的发泡温度且保证发泡剂颗粒(112)分布于第一胶黏剂(111)，以便于烘干后第一胶黏剂(111)能够粘接在被粘接对象上，且第一胶黏剂(111)的粘接在被粘接对象上的表面为第一表面(111S)；
    设置第二胶黏剂层(13)：在第一凹槽(11R)的对应位置设置第二胶黏剂层(13)的浆料，加热至第二温度进行烘干以除去第二溶剂，所述第二温度低于发泡剂颗粒(112)的发泡温度，以便于烘干后第二胶黏剂层(13)能够粘接在被粘接对象上；
    熟化：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，所述第三温度低于发泡剂颗粒(112)的发泡温度，完成结构胶纸(1)的制备；
    在结构胶纸(1)粘接在被粘接对象上之后，当结构胶纸(1)的受热温度大于发泡剂颗粒(112)的发泡温度时，第二胶黏剂层(13)保持与被粘接对象粘接不脱离，第一胶黏剂层(11)中的发泡剂颗粒(112)发泡，其中，部分发泡剂颗粒(112)发泡后露出第一表面(111S)且所述部分发泡剂颗粒(112)沿第一表面(111S)的截面积的总和不小于第一表面(111S)的面积的70％。
  31. 根据权利要求30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一溶剂后，第一溶剂的残余量占第一胶黏剂层(11)的浆料的总重量的比例低于1％。
  32. 根据权利要求30所述的结构胶纸(1)的制备方法，其特征在于，加热至第二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1％。
  33. 根据权利要求30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℃。
  34. 根据权利要求30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℃。
  35. 根据权利要求30所述的结构胶纸(1)的制备方法，其特征在于，第三温度为40℃～45℃。
  36. 根据权利要求30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)中的第一凹槽(11R)沿厚度方向(T)贯通第一胶黏剂层(11)。
  37. 根据权利要求36所述的结构胶纸(1)的制备方法，其特征在于，在熟化步骤之前还包括：
    设置第二凹槽(12R)：使第一基材(12)沿厚度方向(T)贯通设置有第二凹槽(12R)，且第一基材(12)中的各第二凹槽(12R)与第一胶黏剂层(11)中对应的一个第一凹槽 (11R)沿厚度方向(T)对齐且连通；
    在第二凹槽(12R)内填充第二胶黏剂层(13)：在第二凹槽(12R)的对应位置设置第二胶黏剂层(13)的浆料，加热烘干以除去第二溶剂，加热烘干的温度低于发泡剂颗粒(112)的发泡温度，使第一基材(12)中的第二凹槽(12R)内填充有第二胶黏剂层(13)。
  38. 根据权利要求37所述的结构胶纸(1)的制备方法，其特征在于，第一基材(12)中的各第二凹槽(12R)与第一胶黏剂层(11)中对应的一个第一凹槽(11R)通过模切冲孔一起形成。
  39. 根据权利要求37所述的结构胶纸(1)的制备方法，其特征在于，在熟化步骤之前还包括：
    制备第三胶黏剂层(15)的浆料：将第三胶黏剂以及第三溶剂搅拌制成第三胶黏剂层(15)的浆料；
    设置第三胶黏剂层(15)：第三胶黏剂层(15)的浆料设置在第一基材(12)的背离第一胶黏剂层(11)的表面上，加热烘干以除去第三溶剂，加热烘干的温度低于发泡剂颗粒(112)的发泡温度。
  40. 根据权利要求39所述的结构胶纸(1)的制备方法，其特征在于，第三胶黏剂层(15)的浆料和第二胶黏剂层(13)的浆料为同一浆料。
  41. 根据权利要求40所述的结构胶纸(1)的制备方法，其特征在于，
    设置第三胶黏剂层(15)、在第二凹槽(12R)内设置第二胶黏剂层(13)、在第一凹槽(11R)内设置第二胶黏剂层(13)均在设置第三胶黏剂层(15)时一起完成。
  42. 根据权利要求39所述的结构胶纸(1)的制备方法，其特征在于，熟化步骤之前还包括：
    设置第二基材(14)：在第三胶黏剂层(15)的背离第一基材(12)的表面设置第二基材(14)；且熟化步骤还使得第三胶黏剂层(15)熟化。
  43. 根据权利要求37所述的结构胶纸(1)的制备方法，其特征在于，熟化步骤之前还包括：
    设置第二基材(14)：在第一基材(12)的背离第一胶黏剂层(11)的表面设置第二基材(14)。
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