1k polyurethane adhesive nozzle design and temperature-controlled dispensing mechanism

Abstract

A method of forming an adhesive layer, the method comprising: providing a blocked isocyanate component and a polyol component; introducing the blocked isocyanate component and the polyol component into a first end of a heated chamber; heating the heated chamber at a temperature and for a time sufficient to unblock the blocked isocyanate component to form an unblocked isocyanate component; extruding the unblocked isocyanate component and the polyol component from a second end of the heated chamber and into a dispenser nozzle; and dispensing the unblocked isocyanate component and the polyol component from the dispenser nozzle to form an adhesive layer, wherein an amount of unblocking of the blocked isocyanate component is determined in the heated chamber using a first detection probe located proximate the first end of the heated chamber and a second detection probe located proximate the second end of the heated chamber.

Description

Technical Field

[0001] This invention relates to battery cell technology, and more particularly to thermal adhesives, and optionally to structural adhesives, for electrochemical batteries used in electric vehicles. Background Technology

[0002] High-voltage electrical systems are increasingly used to power onboard functions of both mobile and stationary systems. For example, in motor vehicles, the need for increased fuel economy and reduced emissions has led to the development of advanced electric vehicles (EVs). Electric vehicles rely on rechargeable energy storage systems (RESS), typically comprising one or more high-voltage battery packs and an electric drive system to transfer power from the batteries to the wheels. Depending on the power requirements of a given application, the battery pack can include any number of interconnected battery modules. Each battery module comprises a collection of electrically coupled electrochemical cells. The battery pack is configured to provide a direct current (DC) output voltage at a level suitable for powering coupled electrical and / or mechanical loads, such as electric motors.

[0003] A battery pack comprises an anode, a cathode, an electrolyte composition, and optionally a separator. A battery cell can operate in a charging mode, receiving electrical energy. A battery cell can also operate in a discharging mode, supplying electrical energy. A battery cell can operate through charge and discharge cycles, in which the battery first receives and stores electrical energy and then supplies it to connected systems. These charge and discharge cycles, especially during vehicle operation, generate heat due to the resistance and electrochemical reactions within the battery. Effective thermal management is crucial for heat dissipation and maintaining the safety and performance of the battery system. In vehicles powered by electricity, the vehicle's battery can be charged, and the vehicle can then travel for a period of time, using the stored electrical energy to generate power.

[0004] There remains a continued need for adhesives suitable for electric vehicle structures and battery thermal interface applications. Summary of the Invention

[0005] One method for forming an adhesive layer is provided. The method includes providing a sealed isocyanate component and a polyol component. The sealed isocyanate component and polyol component are then introduced into a first end of a heating chamber. The heating chamber is heated at a temperature and time sufficient to deseal the sealed isocyanate component to form a desealable isocyanate component. The desealable isocyanate component and polyol component are extruded from a second end of the heating chamber and enter a dispenser nozzle. The desealable isocyanate component and polyol component are dispensed from the dispenser nozzle to form an adhesive layer. The amount of desealable isocyanate component is determined within the heating chamber using a first detection probe located near the first end of the heating chamber and a second detection probe located near the second end of the heating chamber.

[0006] In one embodiment of the method, the heating chamber is heated to a temperature of 60°C to 200°C.

[0007] In one embodiment of the method, the heating chamber is heated for 5 minutes to 4 hours.

[0008] In one embodiment of the method, the first detection probe is a Fourier transform infrared spectrometer probe.

[0009] In one embodiment of the method, the second detection probe is a Fourier transform infrared spectrometer probe.

[0010] In one embodiment of the method, the adhesive layer does not include foam.

[0011] In one embodiment of the method, the adhesive layer does not include a foaming agent.

[0012] In one embodiment of the method, the adhesive layer does not include propellant.

[0013] In an embodiment of the method, the heating chamber is heated in a uniform manner.

[0014] In an embodiment of the method, the temperature of the dispenser nozzle is lower than or equal to the temperature of the heating chamber.

[0015] On the other hand, an adhesive dispensing system is provided. The adhesive dispensing system includes a sealed isocyanate component and a polyol component placed in a heating chamber. A heating element is configured to heat the heating chamber at a temperature and time sufficient to unseale the sealed isocyanate component and form unsealed isocyanate components. The adhesive dispensing system also includes a dispenser nozzle for receiving the unsealed isocyanate component and polyol component from the heating chamber, wherein the dispenser nozzle is configured to dispense the unsealed isocyanate component and polyol component. The amount of unsealed isocyanate component is determined in the heating chamber using a first detection probe located near a first end of the heating chamber and a second detection probe located near a second end of the heating chamber.

[0016] In one embodiment of the adhesive dispensing system, the heating chamber is heated to a temperature of 60°C to 200°C. In another embodiment of the adhesive dispensing system, the heating chamber is heated for 5 minutes to 4 hours.

[0017] In one embodiment of the adhesive dispensing system, the first detection probe is a Fourier transform infrared spectrometer probe.

[0018] In one embodiment of the adhesive dispensing system, the second detection probe is a Fourier transform infrared spectrometer probe.

[0019] In one embodiment of the adhesive dispensing system, the adhesive dispensing system does not include a foam component.

[0020] In one embodiment of the adhesive dispensing system, the adhesive dispensing system does not include a foaming agent.

[0021] In one embodiment of the adhesive dispensing system, the adhesive dispensing system does not include a propellant.

[0022] In embodiments of the adhesive dispensing system, the heating chamber is heated in a uniform manner.

[0023] In an embodiment of the adhesive dispensing system, the temperature of the dispenser nozzle is less than or equal to the temperature of the heating chamber.

[0024] The above-described features and advantages, as well as other features and advantages, of this disclosure will become apparent from the following detailed description when taken in conjunction with the accompanying drawings. Attached Figure Description

[0025] Other features, advantages, and details appear only by way of example in the following detailed description, with reference to the accompanying drawings, wherein:

[0026] Figure 1 It is a vehicle configured according to one or more embodiments;

[0027] Figure 2 It is an adhesive dispensing system according to one or more embodiments; and

[0028] Figure 3 A flowchart illustrating an illustrative method according to one or more embodiments is shown. Detailed Implementation

[0029] The following description is exemplary in nature only and is not intended to limit this disclosure, its application, or use. It should be understood that in all the drawings, corresponding reference numerals denote the same or corresponding parts and features.

[0030] According to an exemplary embodiment, the vehicle is Figure 1 The vehicle 100 is generally indicated by 100. The vehicle 100 is shown in the form of an automobile having a body 102. The body 102 includes a passenger compartment 104, within which a steering wheel, front seats, and rear passenger seats (not shown separately) are arranged. Various components are arranged within the body 102, including, for example, an electric motor 106 (shown by a projection under the hood). The electric motor 106 is shown only for ease of illustration and discussion; it should be understood that its configuration, location, size, arrangement, etc., are not intended to be particularly limited, and all such configurations (including multi-motor configurations) are within the scope of this disclosure.

[0031] The electric motor 106 is powered by the battery pack 108 (shown via a projection near the rear of the vehicle 100, although other locations are explicitly considered but not shown). The battery pack 108 is shown merely for ease of illustration and discussion. It should be understood that the configuration, location, size, and arrangement of the battery pack 108 are not intended to be particularly limited, and all such configurations (including separate configurations) are within the scope of this disclosure. Furthermore, while this disclosure is primarily discussed in the context of the battery pack 108 configured for the electric motor 106 of the vehicle 100, the aspects described herein can be similarly incorporated into any system (vehicle, building, or otherwise) having an energy storage system (e.g., one or more battery packs or modules), and all such configurations and applications are within the scope of this disclosure.

[0032] As previously described, the various components of the battery pack 108 are attached or joined to each other using adhesives suitable for thermal interface applications. According to an exemplary embodiment, a method for forming an adhesive layer using an adhesive dispensing system is disclosed. Reference Figure 2 An adhesive dispensing system 200 is provided.

[0033] The method includes providing a sealed isocyanate component and a polyol component. For example, the sealed isocyanate component and the polyol component may be stored in a reservoir 201 until they are introduced into the first end 203 of a heating chamber 210. The heating chamber 210 is then heated for a period of time at a temperature sufficient to deseal the sealed isocyanate component to form a desealable isocyanate component.

[0034] The heating chamber 210 can be heated at any suitable temperature to affect the unsealing of the sealed isocyanate component. For example, in some embodiments, the heating chamber 210 can be heated at temperatures of 60°C to 200°C, 60°C to 180°C, 60°C to 160°C, or 60°C to 150°C. In other embodiments, the heating chamber 210 can be heated at temperatures of 70°C to 200°C, 80°C to 200°C, or 100°C to 200°C.

[0035] The heating chamber 210 can be heated for any suitable time to achieve the unsealing of the sealed isocyanate component. For example, in some embodiments, the heating chamber 210 can be heated for 5 minutes to 4 hours, 10 minutes to 4 hours, 15 minutes to 4 hours, or 20 minutes to 4 hours. In other embodiments, the heating chamber 210 can be heated for 5 minutes to 3 hours, 5 minutes to 2 hours, or 1 hour to 2 hours.

[0036] The heating chamber 210 can be any suitable size and design. The heating chamber 210 can have a length extending from the first end 203 to the second end 205, which is sufficient to allow the sealed isocyanate group to deseal.

[0037] The heating chamber 210 can be connected to the plunger 230 for moving the component through the heating chamber 210, into the dispenser nozzle 240, and ultimately onto the substrate 250. Any suitable plunger 230 can be used to propel the component through the dispenser system.

[0038] Heating of the heating chamber 210 can be accomplished using any suitable method. In some embodiments, the heating chamber is heated in a uniform manner.

[0039] The unsealed isocyanate and polyol components are then extruded from the second end 205 of the heating chamber 210 and enter the dispenser nozzle 240. The unsealed isocyanate and polyol components, along with any reaction products, are then dispensed from the dispenser nozzle 240 onto the substrate 250, forming an adhesive layer. The temperature of the dispenser nozzle 240 can be less than or equal to the temperature of the heating chamber 210.

[0040] The degree of unsealing of the blocked isocyanate component is determined in situ using a detection probe. The number of unsealed blocked isocyanate components is determined in heating chamber 210 using a first detection probe 220 located near the first end 203 of heating chamber 210. The number of unsealed blocked isocyanate components can also be determined in heating chamber 210 using a second detection probe 222 located near the second end 205 of heating chamber 210. Any suitable detection probe can be used, as described below. The degree of unsealing can be assessed at both locations to determine whether sufficient unsealing of the blocked isocyanate component has occurred. When unsealing is insufficient, the residence time and / or heating temperature can be adjusted accordingly to achieve sufficient unsealing in heating chamber 210.

[0041] In some embodiments, the first detection probe 220 may be a Fourier transform infrared spectrometer probe. In some embodiments, the first detection probe 220 may further include a temperature sensor. The first detection probe 220 is configured to determine the degree of free (unblocked) isocyanate groups in the blocked isocyanate component.

[0042] In some embodiments, the second detection probe 222 may be a Fourier transform infrared spectrometer probe. In some embodiments, the second detection probe 222 may further include a temperature sensor. The second detection probe 222 is configured to determine the degree of free (unblocked) isocyanate groups in the blocked isocyanate component.

[0043] In some embodiments, the mixture comprising the blocked isocyanate component and the polyol component does not further comprise a foam or blowing agent. In some embodiments, the mixture comprising the blocked isocyanate component and the polyol component does not further comprise a blowing agent. In some embodiments, the mixture comprising the blocked isocyanate component and the polyol component does not further comprise a propellant. That is, in some embodiments, the resulting adhesive layer does not include foam, blowing agent, propellant, or a combination thereof.

[0044] The single-component system or 1K polyurethane system of the present invention comprises a blocked isocyanate, wherein the NCO group reacts with a blocking agent to prevent reaction with the polyol. The blocking agent is decomposed by heating to release free NCO, which is then free to react. The isocyanate is generally considered to be a polyisocyanate having the structure R—(N═C═O)n, wherein n is at least 2, at least 3, at least 4, at least 5, at least 6, at least 7, or at least 8, and wherein R is an aliphatic and / or cyclic group. In one embodiment, n of the isocyanate is equal to n in methylene diphenyl diisocyanate (MDI). In one embodiment, the isocyanate is a diisocyanate (R—

[0045] (N═C═O)2 or (O═C═N)—R—(N═C═O)).

[0046] Blocked isocyanate components can be aromatic, aliphatic, (cyclic) aliphatic and / or cyclic aliphatic polyisocyanate components. Exemplary isocyanates include, but are not limited to, aromatic diisocyanates, such as 2,4- and 2,6-toluene diisocyanate (TDI), diphenylmethane-4,4'-diisocyanate (MDI), naphthalene-1,5-diisocyanate (NDI), 3,3'-dimethyl-4,4'-biphenyl diisocyanate (TODI), crude TDI, polymethylene polyphenyl isocyanurate, crude MDI, xylene diisocyanate (XDI), and mixtures of phenyl diisocyanates; aliphatic diisocyanates, such as 4,4'-methylene-dicyclohexyl diisocyanate (hydrogenated MDI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), and cyclohexane diisocyanate (hydrogenated XDI); and modified products thereof, such as isocyanurates, carbodiimides, and ureoformamides.

[0047] Blocking agents suitable for NCO groups include all common compounds that can be eliminated again at temperatures below 200°C, such as methyl ethyl ketoxime, acetone oxime, phenol and phenol derivatives, ε-caprolactam, 1,2,4-triazole, 2,5-dimethylpyrazole, diethyl malonate, ethyl acetoacetate, N-tert-butyl-N-benzylamine, or diisopropylamine.

[0048] Non-limiting examples of commercially available closed polyisocyanates include those from Covestro. 2794 (an HDI trimer blocked by 3,5-dimethylpyrazole, and further comprising N-(2-aminoethyl)-β-alanine ester; acid value 10 mg KOH / g) and from Covestro BL XP 2706 (blocked aliphatic polyisocyanate, acid value 32 mg KOH / g) (Covestro AG, Germany). 2794 can be deblocked at approximately 130°C. Non-limiting examples of commercially available nonionic blocked polyisocyanates that can be used include Matsui FIXER from Matsui Color Sorting Chemicals Co., Ltd. TM WF-N (3,5-dimethylpyrazole nonionic blocked polyisocyanate) (Matsui Color Selection Chemical Co., Ltd., Japan) and from Baxenden Aqua BI 220 (Nonionic Aliphatic Water-Dispersible Blocked Isocyanate) (Baxenden Chemicals Limited, UK). Matsui FIXER TM WF-N can be deblocked at approximately 150°C. Other examples of usable blocked polyisocyanates include those from Covestro. BL 2867 BL 2781 BL 5335 XL 6366XP XL 825 XL 7270 XL 3674XP or from Evonik (Evonik Industries AG, Germany) EP-DS1205E and EP-DS1076.

[0049] Compounds with terminal hydroxyl groups (R-(OH)) n ), wherein n is at least 2 (referred to herein as "bifunctional"), at least 3 (referred to herein as "trifunctional"), at least 4, at least 5, at least 6, at least 7, at least 8, at least 9 and not greater than 10, wherein R is an aliphatic and / or cyclic group, referred to herein as "polyol". Those skilled in the art will recognize that polyol mixtures typically comprise small amounts of monofunctional compounds having a single terminal hydroxyl group.

[0050] Examples of polyols include, but are not limited to, polyester polyols and polyether polyols. Examples of polyester polyols include, but are not limited to, polyols formed by the condensation of acids and alcohols. Specific examples include polyols composed of phthalic anhydride and diethylene glycol, phthalic anhydride and dipropylene glycol, adipic acid and butanediol, or succinic acid and butanediol or hexanediol. Examples of polyether polyols include, but are not limited to, polyols polymerized from oxides such as ethylene oxide, propylene oxide, or butane oxide from initiators such as glycerol, dipropylene glycol, TPG (tripropylene glycol), castor oil, sucrose, or sorbitol. Other examples of polyols include, but are not limited to, polycarbonate polyols and lactone polyols such as polycaprolactone. In one embodiment, compounds having terminal hydroxyl groups (R-(OH)) n The molecular weight (calculated before incorporating a compound with terminal hydroxyl groups into the polymer) is between 200 Daltons and 20,000 Daltons, for example, between 200 Daltons and 10,000 Daltons.

[0051] Non-limiting examples of commercially available polyols that can be used include A145, A2058, A2227 / 1, A242, A2427, A2542, A2546, A2601, A2646, A2651, A2695, AXP2770, A2845XP, A2846XP, U241, U355, U475, UXP2750, U2757, UXP2766, UXP7110E and combinations thereof (Covestro AG, Germany).

[0052] The combination of blocked isocyanates and polyols may further include additives. Exemplary additives include, but are not limited to, catalysts, chain extenders, curing agents, surfactants, pigments, dyes, rheology modifiers, and fillers such as inorganic fillers.

[0053] For example, suitable catalysts may include amine or organometallic catalysts, such as tin compounds, bismuth compounds, zinc compounds, and zirconium compounds. Optionally, bismuth carboxylate can be a suitable catalyst, such as bismuth neodecanoate and / or bismuth ethylhexanoate. Suitable amine catalysts include cyclohexyldimethylamine, 2-dimethylaminoethanol, 4-ethylmorpholine, N,N,4-trimethylpiperazine-1-ethylamine, 1,4-dimethylpiperazine, 3-aminopropyldimethylamine, 2,2′-iminodiethanol, 1-methylimidazole, 1,2-dimethylimidazole, 2-[[2-(dimethylamino)ethyl]methylamino]ethanol, N-[3-(dimethylamino)propyl]-N,N′,N′-trimethylpropane-1,3-diamine, formic acid, compounds with 2,2′-oxybis[N,N-dimethylethylamine] (2:1), 1,1′-[[3-(dimethylamino)propyl]imino]bisprop-2-ol, 2-[(2-[2-(dimethylamino)ethoxy]ethyl)methylamino]ethanol, benzyldimethylamine 4- Methylmorpholine, N,N,N′,N′-tetramethylhexamethylenediamine, 2-[2-(dimethylamino)ethoxy]ethanol, 1,4-diazabicyclooctane, bis(2-dimethylaminoethyl)(methyl)amine, N,N,N′,N′-tetramethyl-2,2′-oxybis(ethylamine), 2,2′-dimorpholinodiethyl ether, 1,8-diazabicyclo[5.4.0]undec-7-ene, N′-[3-(dimethylamino)propyl]-N,N-dimethylpropane-1,3-diamine, N,N,N′,N′,N″,N″-hexamethyl-1,3,5-triazine-1,3,5(2H,4H,6H)-tripropylamine, and N,N-bis[3-(dimethylamino)propyl]-N′,N′-dimethylpropane-1,3-diamine.

[0054] Other examples of suitable catalysts include tetramethylammonium carboxylic acid, tetramethylammonium acetate, tetramethylammonium propionic acid, tetramethylammonium butyric acid, tetramethylammonium benzoic acid, tetraethylammonium carboxylic acid, tetraethylammonium acetate, tetraethylammonium propionic acid, tetraethylammonium butyric acid, tetraethylammonium benzoic acid, tetrapropylammonium carboxylic acid, tetrapropylammonium acetate, tetrapropylammonium propionic acid, tetrapropylammonium butyric acid, tetrapropylammonium benzoic acid, tetrabutylammonium carboxylic acid, tetrabutylammonium acetate, tetrabutylammonium propionic acid, tetrabutylammonium butyric acid and tetrabutylammonium benzoic acid, methyltributylammonium hydroxide, and methyltriethylammonium hydroxide. Tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, tetrapentylammonium hydroxide, tetrahexylammonium hydroxide, tetraoctylammonium hydroxide, tetradecylammonium hydroxide, tetradecyltrihexylammonium hydroxide, tetraoctadecylammonium hydroxide, benzyltrimethylammonium hydroxide, benzyltriethylammonium hydroxide, trimethylphenylammonium hydroxide, triethylmethylammonium hydroxide, trimethylvinylammonium hydroxide, tetramethylammonium fluoride, tetraethylammonium fluoride, tetrabutylammonium fluoride, tetraoctylammonium fluoride, benzyltrimethylammonium fluoride.

[0055] On the other hand, an adhesive dispensing system 200 is provided. (See again...) Figure 2 The adhesive dispensing system includes a sealed isocyanate component and a polyol component disposed in a heating chamber 210. A heating element 215 is configured to heat the heating chamber 210 at a temperature and time sufficient to unseale the sealed isocyanate component and form a unsealed isocyanate component. The adhesive dispensing system 200 also includes a dispenser nozzle 240 for receiving the unsealed isocyanate component and polyol component from the heating chamber 210, wherein the dispenser nozzle 240 is configured to partially react the unsealed isocyanate component and polyol component therein. The amount of unsealed isocyanate component in the heating chamber 210 is determined using a first detection probe 220 located near a first end 203 of the heating chamber and a second detection probe 222 located near a second end 205 of the heating chamber 210.

[0056] The heating element 215 can be any suitable type of heater or heating device. For example, the heating element 215 may include one or more resistance heaters, one or more ceramic heaters, etc. The adhesive dispensing system 200 may include one or more heating elements 215.

[0057] Figure 3 This is a flowchart 300 illustrating a method for operating an adhesive dispensing system 200 according to one or more embodiments. The flowchart begins at block 301, where a mixture of a closed isocyanate component and a polyol component is introduced into a first end 203 of a heating chamber 210. Subsequently, in block 302, the heating chamber 210 is heated for a period of time at a temperature sufficient to de-encapsulate the closed isocyanate component to form a de-encapsulated isocyanate component. In block 303, a first detection probe 220 and a second detection probe 222 are used to determine the degree of de-encapsulation of the closed isocyanate component. If the closed isocyanate is not sufficiently de-encapsulated, proceed to block 302 to continue heating. If the closed isocyanate has been sufficiently de-encapsulated, proceed to block 304 by extruding the de-encapsulated isocyanate component and polyol component from a second end 205 of the heating chamber 210 and into a dispenser nozzle 240. In box 305, the unsealed isocyanate component and polyol component may partially react in dispenser nozzle 240 before being dispensed from dispenser nozzle 240 to form an adhesive layer.

[0058] In terms of hardware architecture, the adhesive dispensing system can be partially implemented using a computing device that may include a processor, memory, and one or more input and / or output (I / O) device interfaces, which are communicatively coupled via a local interface. The local interface may include, for example, but not limited to, one or more buses and / or other wired or wireless connections. The local interface may have additional components omitted for simplicity, such as controllers, buffers (caches), drivers, repeaters, and receivers, to enable communication. Furthermore, the local interface may include address, control, and / or data connections to enable appropriate communication between the aforementioned components.

[0059] When a computing device is running, a processor can be configured to execute software stored in memory, transfer data to and from memory, and control the operation of the computing device in general, according to the software. The software in memory is read, in whole or in part, by the processor, possibly buffered within the processor, and then executed. A processor can be a hardware device used to execute software, particularly software stored in memory. A processor can be a custom-designed or commercially available processor, a central processing unit (CPU), a coprocessor among several processors associated with a computing device, a semiconductor-based microprocessor (in the form of a microchip or chipset), or any device typically used to execute software.

[0060] Memory can include any one or a combination of volatile memory elements (e.g., random access memory (RAM, such as DRAM, SRAM, SDRAM, VRAM, etc.)) and / or non-volatile memory elements (e.g., ROM, hard disk drive, CD-ROM, etc.). Furthermore, memory can incorporate electrical, magnetic, optical, and / or other types of storage media. Note that memory can also have a distributed architecture, where various components are geographically separated but accessible to the processor.

[0061] Software in memory can include one or more individual programs, each comprising an ordered list of executable instructions for implementing logical functions. System components embodied as software can also be interpreted as source programs, executable programs (object code), scripts, or any other entity containing a set of instructions to be executed. When constructed as a source program, it is translated by compilers, assemblers, interpreters, etc., which may or may not be contained in memory.

[0062] It should be noted that Figure 3The diagram illustrates an architecture, functionality, and / or operational scheme that can be partially implemented using software. At this point, one or more blocks can be interpreted as representing modules, code segments, or code sections, comprising one or more executable instructions for implementing specified logical functions. It should also be noted that in some alternative implementations, the functions mentioned in the boxes may occur out of order and / or not at all. For example, two boxes shown consecutively may actually execute substantially simultaneously, or these boxes may sometimes execute in reverse order, depending on the functionality involved.

[0063] It should be noted that any functionality described herein can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, a processor-containing system, or other system that can fetch and execute instructions from and from an instruction execution system, apparatus, or device. In the context of this document, "computer-readable medium" includes, stores, communicates, propagates, and / or transmits programs used by or in connection with an instruction execution system, apparatus, or device. Computer-readable media can be, for example, but not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices. More specific examples (not an exhaustive list) of computer-readable media include portable computer disks (magnetic), random access memory (RAM) (electronic), read-only memory (ROM) (electronic), erasable programmable read-only memory (EPROM or flash memory) (electronic), and portable optical disc read-only memory (CDROM) (optical).

[0064] The term "a" does not imply a limitation of quantity, but rather indicates the presence of at least one of the referenced items. The term "or" means "and / or," unless the context clearly indicates otherwise. Throughout the specification, reference to "an aspect" means that a particular element described in connection with that aspect (e.g., a feature, structure, step, or characteristic) is included in at least one aspect described herein and may or may not be present in other aspects. Furthermore, it should be understood that the described elements may be combined in any suitable manner across the aspects.

[0065] When an element, such as a layer, film, region, or substrate, is referred to as being "on" another element, it can be directly on the other element, or there may be intermediate elements present. Conversely, when an element is referred to as being "directly on" another element, there are no intermediate elements present.

[0066] Unless otherwise stated herein, all testing standards are the most recent valid standards up to the date of this application, or, if priority is claimed, the date of the earliest priority application in which the testing standard appears.

[0067] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains.

[0068] While the foregoing disclosure has been described with reference to exemplary embodiments, those skilled in the art will understand that various changes can be made and equivalents can replace its elements without departing from its scope. Furthermore, many modifications can be made to adapt particular situations or materials to the teachings of this disclosure without departing from its essential scope. Therefore, it is intended that this disclosure be limited to the specific embodiments disclosed, but will include all embodiments falling within its scope.

Claims

1. A method for forming an adhesive layer, the method comprising: It provides closed isocyanate and polyol components; The sealed isocyanate component and polyol component are introduced into the first end of the heating chamber; The heating chamber is heated at a temperature and time sufficient to unblock the sealed isocyanate component, thereby forming the unblocked isocyanate component; The unsealed isocyanate and polyol components are extruded from the second end of the heating chamber and enter the dispenser nozzle; and The unsealed isocyanate and polyol components are dispensed from the dispenser nozzle to form an adhesive layer. The method uses a first detection probe located near the first end of the heating chamber and a second detection probe located near the second end of the heating chamber to determine the number of sealed isocyanate components unsealed in the heating chamber.

2. The method according to claim 1, wherein the heating chamber is heated at a temperature of 60°C to 200°C for 5 minutes to 4 hours, or a combination thereof.

3. The method according to claim 1, wherein the first detection probe is a Fourier transform infrared spectrometer probe, the second detection probe is a Fourier transform infrared spectrometer probe, or a combination thereof.

4. The method of claim 1, wherein the adhesive layer does not contain foam, foaming agent, propellant, or a combination thereof.

5. The method of claim 1, wherein the heating chamber is heated in a uniform manner, and wherein the temperature of the distributor nozzle is less than or equal to the temperature of the heating chamber, or a combination thereof.

6. An adhesive dispensing system, comprising: Enclosed isocyanate and polyol components placed in a heating chamber; A heating element configured to heat the heating chamber at a temperature and time sufficient to unblock the sealed isocyanate component and form an unblocked isocyanate component; and Dispenser nozzles for receiving the unsealed isocyanate and polyol components from the heating chamber, wherein the dispenser nozzles are configured to dispense the unsealed isocyanate and polyol components. The method uses a first detection probe located near the first end of the heating chamber and a second detection probe located near the second end of the heating chamber to determine the number of sealed isocyanate components unsealed in the heating chamber.

7. The adhesive dispensing system of claim 6, wherein the heating chamber is heated at a temperature of 60°C to 200°C for 5 minutes to 4 hours, or a combination thereof.

8. The adhesive dispensing system of claim 6, wherein the first detection probe is a Fourier transform infrared spectrometer probe, the second detection probe is a Fourier transform infrared spectrometer probe, or a combination thereof.

9. The adhesive dispensing system of claim 6, wherein the adhesive dispensing system does not include foam components, foaming agents, propellants, or combinations thereof.

10. The adhesive dispensing system of claim 6, wherein the heating chamber is heated in a uniform manner, and wherein the temperature of the dispenser nozzle is less than or equal to the temperature of the heating chamber, or a combination thereof.

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