CN115707731A - 可发泡交联的热塑性材料、连接器及其制备方法 - Google Patents

可发泡交联的热塑性材料、连接器及其制备方法 Download PDF

Info

Publication number
CN115707731A
CN115707731A CN202110949256.7A CN202110949256A CN115707731A CN 115707731 A CN115707731 A CN 115707731A CN 202110949256 A CN202110949256 A CN 202110949256A CN 115707731 A CN115707731 A CN 115707731A
Authority
CN
China
Prior art keywords
thermoplastic material
cross
material according
connector
matrix polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110949256.7A
Other languages
English (en)
Inventor
黄忠喜
周建坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tyco Electronics Shanghai Co Ltd
Original Assignee
Tyco Electronics Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tyco Electronics Shanghai Co Ltd filed Critical Tyco Electronics Shanghai Co Ltd
Priority to CN202110949256.7A priority Critical patent/CN115707731A/zh
Priority to US17/890,355 priority patent/US20230059621A1/en
Publication of CN115707731A publication Critical patent/CN115707731A/zh
Pending legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • B29C45/14786—Fibrous material or fibre containing material, e.g. fibre mats or fibre reinforced material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14008—Inserting articles into the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/7207—Heating or cooling of the moulded articles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/16—Making expandable particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/002—Making articles of definite length, i.e. discrete articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/7604—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76344—Phase or stage of measurement
    • B29C2945/76381—Injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0088—Blends of polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/251—Particles, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
    • C08J2201/026—Crosslinking before of after foaming
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/30—Applications used for thermoforming
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2312/00—Crosslinking

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

公开了可发泡交联的热塑性材料、连接器及其制备方法。可发泡交联的热塑性材料包含：基体聚合物；交联剂；和发泡剂，其中基体聚合物为聚乙烯(PE)、乙烯‑乙酸乙烯共聚物(EVA)和聚丙烯(PP)中的任一种或两种以上的混合物；交联剂与基体聚合物的重量比为1‑5：100；且发泡剂与基体聚合物的重量比为1‑5：100，所述热塑性材料的交联发泡温度等于或高于所述基体聚合物的熔点。本发明的热塑性材料可以在预成型后原位交联并发泡。

Description

可发泡交联的热塑性材料、连接器及其制备方法
技术领域
本公开涉及电子器件技术领域，尤其涉及用于连接器产品的密封材料及其应用。
背景技术
连接器产品通常包括端子和塑料壳体。塑料壳体起支撑，绝缘，密封等作用。连接器产品在使用时要面对严苛的环境，而产品的密封性能决定了在严苛环境下对产品的保护能力。越来越严苛的密封要求对产品的密封结构提出了更高的挑战。
目前连接器产品中的密封常用密封圈，灌胶，嵌件注塑等方案。但是，随着连接器产品的结构越来越复杂，对产品的密封要求越来越高，常规的密封圈、嵌件注塑等难以满足这样的需求，而灌胶工艺相对复杂，操作不方便。因此，需要一种密封性更强、工艺较简单的密封方案。
发明内容
本公开主要针对使用密封圈的密封连接或灌胶不方便的连接器的密封问题，提出了一种可原位发泡和交联的密封材料，由该密封材料制成的预制件(预成型件)或粘结层可以在高温处理时发泡和交联，达到更好的粘结和密封效果。
本公开的一个方面涉及一种可发泡交联的热塑性材料，所述热塑性材料包含：基体聚合物；交联剂；和发泡剂，其中所述基体聚合物为聚乙烯(PE)、乙烯-乙酸乙烯共聚物(EVA)和聚丙烯(PP)中的任一种或两种以上的混合物；所述交联剂与所述基体聚合物的重量比为1-5：100；所述发泡剂与所述基体聚合物的重量比为1-5：100，且所述可发泡交联材料的交联发泡温度(即发生交联并发泡时的温度)等于或高于所述基体聚合物的熔点。
本发明的热塑性材料可在预成型后原位交联并发泡。
在某些实施方案中，基体聚合物为PE和EVA的混合物，两者的混合比例以重量计为1：9至9：1。
在某些实施方案中，PE选自低密度聚乙烯(LDPE)或超低密度聚乙烯(ULDPE)。
在某些实施方案中，交联剂选自交联剂选自过氧化物交联剂(自由基引发剂)和烯丙基交联剂。
在某些实施方案中，交联剂选自过氧化二异丙苯(Di-cumyl peroxide，DCP)和三烯丙基异氰脲酸酯(Tri-allyl isocyanurate，TAIC)。
在某些实施方案中，发泡剂选自化学发泡剂。
在某些实施方案中，发泡剂为无机发泡剂或有机发泡剂，所述无机发泡剂包括碳酸氢钠，所述有机发泡剂包括：偶氮化合物、氨基脲类化合物、亚硝基化合物。
在某些实施方案中，热塑性材料的交联发泡温度为170℃以上。
本公开的热塑性材料的交联温度和发泡温度可以不同，以两者中高的一方作为交联发泡温度，例如，交联温度可以为170℃，发泡温度可以为160℃，则热塑性材料的交联发泡温度为170℃。优选交联温度和发泡温度尽可能接近。
在某些实施方案中，基体聚合物的熔点在150℃以下。
在某些实施方案中，热塑性材料为通过将各组分在低于交联发泡温度的温度下共混造粒形成的颗粒形式。
在某些实施方案中，热塑性材料为将该材料在低于交联发泡温度的温度下注塑或挤出而成的预制件形式。
在某些实施方案中，预制件为密封圈、密封管或密封片的形式。
本公开的另一方面涉及一种连接器，所述连接器包括壳体和位于壳体内的需要密封的区域，所述区域中填充有上述的热塑性材料或其原位交联并发泡产物。
在某些实施方案中，连接器的需要密封的区域为结构复杂的规则或不规则区域。
本公开的再一方面涉及一种制备连接器的方法，包括：在连接器的组装过程中，将上述的热塑性材料置于连接器的需要密封的区域内；在组装完成后，进行加热处理，使所述热塑性材料熔融，然后发泡、交联，以填充密封区域的空隙。
在某些实施方案中，所述加热处理的温度超过170℃(例如180℃-240℃)。
本公开还涉及另一种制备连接器的方法，包括：
将上述的热塑性材料注塑在端子表面上，形成一层粘结层；
将形成有粘结层的端子置于模具中，进行连接器塑料壳体材料的注塑，同时使所述粘结层发泡并交联，
任选地，在注塑后进行后-热处理，使粘结层进一步交联、发泡。
在某些实施方案中，所述热塑性材料的注塑为在不超过150℃下的嵌件注塑。
在某些实施方案中，所述塑料壳体材料选自聚对苯二甲酸丁二醇酯(PBT)、尼龙6(PA6)尼龙66(PA66)和热塑性聚氨酯(TPU)。
本公开提出了一种可原位发泡和交联的热塑性密封材料，该材料可以预制件或粘结层形式应用于需要密封的部位，再经高温处理，发泡充满密封粘结部位空间，同时交联使结构固定，这样可以达到更强的粘结和密封。
附图说明
图1为本公开实施例1中可发泡交联的热塑性材料在共混造粒前后的照片；
图2显示了本公开实施例1的可发泡交联的热塑性材料在填充连接器的空隙后发泡交联的情况。
具体实施方式
下面对本公开的一些具体实施方式进行描述。
应当理解，在不脱离本公开的范围或精神的情况下，本领域技术人员能够根据本公开的教导设想其他各种实施方案并能够对其进行修改。因此，以下的具体实施方式不具有限制性意义。
除非另外指明，否则说明书和权利要求中使用的表示特征尺寸、数量和物理特性的所有数字均应该理解为在所有情况下均是由术语“约”来修饰的。因此，除非有相反的说明，否则说明书和所附权利要求书中列出的数值参数均是近似值，本领域的技术人员能够利用本文所公开的教导内容寻求获得的所需特性，适当改变这些近似值。用端点表示的数值范围的使用包括该范围内的所有数字以及该范围内的任何范围，例如，1至5包括1、1.1、1.3、1.5、2、2.5、2.75、3、3.5、3.80、4和5等等。
1.可发泡交联材料及其制备方法
以下描述本公开的可发泡交联的热塑性材料的各个组成成分。
(1)基体聚合物
本公开中，可发泡交联的热塑性材料的基体聚合物选自熔点较低的可发泡材料。通常，基体聚合物的熔点低于发泡和交联温度，以便能够在不发泡和交联的情况下进行预成型。例如，基体聚合物的熔点可以为170℃以下，160℃以下，150℃以下，140℃以下，130℃以下，或者120℃以下。
低熔点的基体聚合物可以选自聚乙烯(PE)、乙烯-乙酸乙烯共聚物(EVA)和聚丙烯(PP)中的任一种或两种以上的混合物。其中，PE可以是低密度聚乙烯(LDPE)或超低密度聚乙烯(ULDPE)。
在某些实施方式中，可以采用两者材料的混合物作为基体聚合物。两者材料中至少一种、优选两种都是低熔点材料。例如，可以采用PE和EVA的混合物作为基体聚合物，两者的混合比例(重量比例)可以为1：9至9：1。
(2)交联剂
本公开中，选用交联温度等于或高于基体聚合物熔点的交联剂。交联剂的种类可以根据基体聚合物而选择，其可以是自由基引发剂类型、烯键式交联剂类型等。对于PE、EVA、PP等基体聚合物，可以选择过氧化物交联剂和烯丙基交联剂，例如过氧化二异丙苯(Di-cumyl peroxide，DCP)和三烯丙基异氰脲酸酯(Tri-allyl isocyanurate，TAIC)。
交联剂与基体聚合物的比例可以适当选择，例如重量比为1-5：100，或者2-4：100。
(3)发泡剂
本公开中，发泡剂是使基体聚合物发泡，例如在熔融状态下发泡的化合物。为了便于基体聚合物在不发泡的情况下预成型等，发泡剂的发泡温度一般高于基体聚合物的熔点。
本公开的发泡剂可以是化学发泡剂，其在高温下分解产生气体，并在聚合物组分中形成细孔。分解温度较高的化学发泡剂是适宜的，例如，可以选择碳酸氢钠发泡剂或偶氮类发泡剂(例如偶氮甲酰胺)、氨基脲类发泡剂、亚硝基化合物等。可以根据所用的基体聚合物适当选择发泡剂的具体种类，以获得在170℃以上、180℃以上或190℃以上发泡的材料。
发泡剂与基体聚合物的比例可以适当选择，从达到充分发泡且不显著影响基体聚合物的预成型的目的来看，发泡剂与基体聚合物的重量比可以为1-5：100，或者2-4：100。
(4)可发泡交联的热塑性材料的制备方法
本公开的可发泡交联的热塑性材料可以通过将各个组分彼此混合而得。为了使各组分混合均匀且便于运输、储存，可以将可发泡交联材料制成颗粒形式，即通过将各组分共混造粒而形成颗粒。
共混造粒在低于热塑性材料的交联发泡温度下进行，例如在120-130℃进行。
2.预制件及其制备方法
本公开的可发泡交联的热塑性材料的一个显著优点在于：可以根据其具体应用预成型为所需形状，此时交联剂和发泡剂都不反应，然后，在填充或适配特定应用部位/区域后，经高温处理，进行发泡交联，从而既提高密封填充性，又提高粘结性。
因此，本公开的可发泡交联的热塑性材料可以预成型以形成预制件。例如，通过将热塑性材料注塑或挤出，形成特定形状的预制件，其中交联剂和发泡剂处于非活性状态(即，热塑性材料未发生可观察到的发泡交联)。
根据具体应用，预制件可以具有各种形状。例如，对于用于连接器产品的密封件，预制件可以为密封圈、密封管或密封片的形式。
3、连接器及其制备方法
本公开还涉及可发泡交联的热塑性材料以及预制件的应用，尤其是在连接器密封中的应用。因此，本公开还提供一种连接器，所述连接器包括需要密封的区域/空隙，所述区域/空隙被本公开的可发泡交联的热塑性材料或其原位交联并发泡产物填充。
即，本公开的连接器包括端子和塑料壳体，以及用于密封的密封件，其中所述密封件由本公开的可发泡交联的热塑性材料或预制件经原位交联并发泡而形成。
作为制备本公开的连接器的方法，可以采取以下两种方案之一。
方案一：在连接器的组装过程中，将本公开的可发泡交联的热塑性材料或预制件置于连接器的需要密封的区域内；在组装完成后，进行加热处理，使所述热塑性材料或预制件熔融，然后交联并发泡，以填充密封区域的空隙。
上述实施方案中，加热处理的温度可以超过170℃(例如180℃-240℃)，时间可以为1-10分钟。
方案二包括：将本公开的可发泡交联的热塑性材料(例如颗粒形状)注塑在端子表面上，形成一层粘结层；将形成有粘结层的端子置于模具中，进行连接器塑料壳体材料的注塑，同时使所述粘结层发泡并交联，任选地，在注塑后进行后-热处理，使粘结层进一步交联、发泡。
在上述实施方案中，热塑性材料的注塑可以为在不超过150℃下的嵌件注塑。
在二次注塑形成连接器塑料壳体时，可以适当选择塑料壳体材料，例如聚对苯二甲酸丁二醇酯(PBT)、尼龙6(PA6)尼龙66(PA66)和热塑性聚氨酯(TPU)等，以使二次注塑温度与热塑性材料或预制件的交联发泡温度相匹配，通常高于交联发泡温度。例如对于PBT，二次注塑温度为260℃，对于PA66，二次注塑温度为275℃。
根据上述具体实施方案，本公开的可发泡交联的热塑性材料或其预制件和连接器可以具有以下优点中的至少一项：
(1)由于粘结材料配方中既含有发泡剂，又含有交联剂，能够在高温时发泡填充金属端子与塑料壳体之间的缝隙，又可发生交联使发泡保持，提高粘结材料与密封面的粘结力；
(2)本公开中的材料，可以预成型为密封圈，密封管等。相比现有的常规密封圈没有粘结力方案，本方案仅需一个高温处理可以同时实现密封填缝和增加粘结力，使密封更牢靠；
(3)本公开的材料和方案可通过低压注塑实现在端子和壳体之间形成一层密封和粘结层。通过塑料壳体注塑时的高温就可实现发泡和交联，提高嵌件注塑产品的密封性。本公开的材料应用工艺简单；
(4)本公开的材料在温度170℃以上会发生发泡和交联反应，因此适用于工程塑料，如PBT，PA6，PA66等材料的注塑。
实施例
以下通过实施例更详细地描述本公开，这些实施例仅是示例性的，而不应理解为对本公开范围的限制。
实施例1–可发泡交联材料的制备
将LDPE及EVA按1:1重量比例混合形成基体聚合物，添加交联剂DCP和发泡剂(20％的NaHCO3与LDPE组成的母粒)，交联剂和发泡剂与基体聚合物的重量比分别为2:100和3:100。采用挤出机，将上述混合物在120-130℃下进行共混造粒。图1示出了共混造粒前后的可发泡交联材料的照片。
实施例2–模拟应用实例
取图2所示的连接器端子，在其空隙中填充实施例1获得的可发泡交联材料的颗粒(未填满)，然后加热至200℃，如图2右侧所示，可发泡交联材料经历发泡交联，完全填满连接器端子的空隙，甚至膨胀出该空隙。由该图上侧的局部放大图可以看出，在初始填充状态，可发泡交联材料仍处于颗粒状态，未发泡交联(左上图)，而高温加热后，发生发泡交联。这样，可以达到更强的粘结和密封。
应当理解，上述具体实施方案仅是为了说明本公开，而非限制本公开的范围。本领域技术人员可以在不脱离本公开的精神的前提下进行各种修改和变更。本公开的范围由后附的具体实施方式书限定。

Claims (20)

1.一种可发泡交联的热塑性材料，所述热塑性材料包含：
基体聚合物；
交联剂；和
发泡剂，
其中，
所述基体聚合物为聚乙烯(PE)、乙烯-乙酸乙烯共聚物(EVA)和聚丙烯(PP)中的任一种或两种以上的混合物；
所述交联剂与所述基体聚合物的重量比为1-5：100；
所述发泡剂与所述基体聚合物的重量比为1-5：100；且
所述热塑性材料的交联发泡温度等于或高于所述基体聚合物的熔点。
2.根据权利要求1所述的热塑性材料，其中，所述基体聚合物为PE和EVA的混合物，两者的混合比例以重量计为1：9至9：1。
3.根据权利要求1所述的热塑性材料，其中，所述PE选自低密度聚乙烯(LDPE)或超低密度聚乙烯(ULDPE)。
4.根据权利要求1所述的热塑性材料，其中，所述交联剂选自过氧化物交联剂和烯丙基交联剂。
5.根据权利要求4所述的热塑性材料，其中，所述交联剂选自过氧化二异丙苯(Di-cumyl peroxide，DCP)和三烯丙基异氰脲酸酯(Tri-allyl isocyanurate，TAIC)。
6.根据权利要求1所述的热塑性材料，其中，所述发泡剂为化学发泡剂。
7.根据权利要求6所述的热塑性材料，其中，所述发泡剂为无机发泡剂或有机发泡剂，所述无机发泡剂包括碳酸氢钠，所述有机发泡剂包括：偶氮化合物、氨基脲类化合物、亚硝基化合物。
8.根据权利要求1所述的热塑性材料，其中，所述热塑性材料的交联发泡温度为170℃以上。
9.根据权利要求1所述的热塑性材料，其中，所述热塑性材料为颗粒形式。
10.根据权利要求9所述的热塑性材料，其中所述颗粒通过将各组分在低于交联发泡温度的温度下共混造粒形成。
11.根据权利要求1所述的热塑性材料，其中，所述热塑性材料为预制件形式。
12.根据权利要求11所述的热塑性材料，其中，所述预制件为密封圈、密封管或密封片的形式。
13.根据权利要求11所述的热塑性材料，其中所述预制件由所述可发泡交联材料在低于交联发泡温度的温度下注塑或挤出而成。
14.一种连接器，所述连接器包括壳体和位于壳体内的需要密封的区域，所述区域中填充有根据权利要求1-13中任一项所述的热塑性材料或其原位交联并发泡的产物。
15.根据权利要求14所述的连接器，其中所述需要密封的区域为结构复杂的规则或不规则区域。
16.一种制备连接器的方法，包括：
在连接器的组装过程中，将根据权利要求1-13中任一项所述的热塑性材料置于连接器的需要密封的区域内；
在组装完成后，进行加热处理，使所述热塑性材料熔融，然后交联并发泡，以填充密封区域的空隙。
17.根据权利要求16所述的方法，其中所述加热处理的温度超过170℃。
18.一种制备连接器的方法，包括：
将根据权利要求1-10中任一项所述的热塑性材料注塑在端子表面上，形成一层粘结层；
将形成有粘结层的端子置于模具中，进行连接器塑料壳体材料的注塑，同时使所述粘结层发泡并交联，
任选地，在注塑后进行后-热处理，使粘结层进一步交联、发泡。
19.根据权利要求18所述的方法，其中所述热塑性材料的注塑为在不超过150℃下的嵌件注塑。
20.根据权利要求18所述的方法，其中所述塑料壳体材料选自聚对苯二甲酸丁二醇酯(PBT)、尼龙6(PA6)尼龙66(PA66)和热塑性聚氨酯(TPU)。
CN202110949256.7A 2021-08-18 2021-08-18 可发泡交联的热塑性材料、连接器及其制备方法 Pending CN115707731A (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202110949256.7A CN115707731A (zh) 2021-08-18 2021-08-18 可发泡交联的热塑性材料、连接器及其制备方法
US17/890,355 US20230059621A1 (en) 2021-08-18 2022-08-18 Foamable cross-linkable thermoplastic material, connector and manufacturing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110949256.7A CN115707731A (zh) 2021-08-18 2021-08-18 可发泡交联的热塑性材料、连接器及其制备方法

Publications (1)

Publication Number Publication Date
CN115707731A true CN115707731A (zh) 2023-02-21

Family

ID=85212484

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110949256.7A Pending CN115707731A (zh) 2021-08-18 2021-08-18 可发泡交联的热塑性材料、连接器及其制备方法

Country Status (2)

Country Link
US (1) US20230059621A1 (zh)
CN (1) CN115707731A (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043051A1 (en) * 1998-02-24 1999-08-26 Tyco Electronics Corporation Sealing article
US20040249009A1 (en) * 2002-05-31 2004-12-09 Kiyoshi Homma Olefin-base thermoplastic elastomer foam and olefin-base thermoplastic elastomer composition for the form
CN102690459A (zh) * 2012-04-27 2012-09-26 华东理工大学 高回弹化学交联聚乙烯发泡材料及其制备方法
CN103951866A (zh) * 2014-04-15 2014-07-30 神华集团有限责任公司 发泡聚烯烃组合物和聚烯烃泡沫材料及其制备方法以及由该组合物制备的制品
CN108140962A (zh) * 2015-10-09 2018-06-08 泰连德国有限公司 包括发泡的密封材料的端子组件，包括可发泡的密封材料的电端子和电线，以及用于密封电导体和电端子之间的连接的方法
CN110655702A (zh) * 2018-06-28 2020-01-07 中国石油天然气股份有限公司 聚乙烯发泡材料的制备方法及由其制备的聚乙烯发泡材料

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5605937A (en) * 1994-09-30 1997-02-25 Knaus; Dennis A. Moldable thermoplastic polymer foam beads
WO2016005536A1 (en) * 2014-07-10 2016-01-14 Sika Technology Ag New acoustical foam with improved performance
CN112752790A (zh) * 2018-09-28 2021-05-04 积水化学工业株式会社 交联聚烯烃系树脂发泡体及叠层体

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999043051A1 (en) * 1998-02-24 1999-08-26 Tyco Electronics Corporation Sealing article
US20040249009A1 (en) * 2002-05-31 2004-12-09 Kiyoshi Homma Olefin-base thermoplastic elastomer foam and olefin-base thermoplastic elastomer composition for the form
CN102690459A (zh) * 2012-04-27 2012-09-26 华东理工大学 高回弹化学交联聚乙烯发泡材料及其制备方法
CN103951866A (zh) * 2014-04-15 2014-07-30 神华集团有限责任公司 发泡聚烯烃组合物和聚烯烃泡沫材料及其制备方法以及由该组合物制备的制品
CN108140962A (zh) * 2015-10-09 2018-06-08 泰连德国有限公司 包括发泡的密封材料的端子组件，包括可发泡的密封材料的电端子和电线，以及用于密封电导体和电端子之间的连接的方法
CN110655702A (zh) * 2018-06-28 2020-01-07 中国石油天然气股份有限公司 聚乙烯发泡材料的制备方法及由其制备的聚乙烯发泡材料

Also Published As

Publication number Publication date
US20230059621A1 (en) 2023-02-23

Similar Documents

Publication Publication Date Title
TWI673156B (zh) 單相溶液模製方法
EP1656419B1 (en) Compositions for heat-recoverable foam tubing
JP3844499B2 (ja) 熱可塑性樹脂発泡体
US11458657B2 (en) Method of microcellular foam molding
JP2001151925A (ja) 発泡性造形品の製造方法
CN109485984A (zh) 一种高分子物理发泡材料的发泡方法
EP3122528B1 (en) Shape memory products and method for making them
CN115707731A (zh) 可发泡交联的热塑性材料、连接器及其制备方法
JP2023184718A (ja) 樹脂成形体
KR102010457B1 (ko) 저비중 성형 폼 조성물 및 이를 이용한 성형 폼의 제조방법
KR20180034074A (ko) 형내 발포 적합형 발포체 조성물을 이용한 발포체 제조방법
JPH1044178A (ja) 発泡性熱可塑性樹脂シート状体、熱可塑性樹脂発泡体、及びそれらの製造方法
US5700407A (en) Molded polymeric foam preparation method
WO2002046273A3 (de) Schüttfähige thermoplastische trägerpolymeren mit integrierten additiven
KR101780557B1 (ko) 재활용 pvc를 이용한 냉,난방용 배관
KR20200025595A (ko) 마이크로웨이브로 성형 가능한 고분자 조성물 및 이를 이용한 발포체 조성물의 성형방법
JPS5848576B2 (ja) ハツポウセイポリエチレンビ−ズノセイゾウホウ
CN113001864B (zh) 一种基于发泡注塑制坯的聚合物微发泡装置和工艺
JP2603859B2 (ja) 射出成型発泡体の製造方法
JP2003020353A (ja) 射出発泡成形用オレフィン系樹脂組成物およびそれからなる射出発泡成形体
JP3452385B2 (ja) 複合発泡体の製造方法
JPH073037A (ja) 合成樹脂成形体の製造方法
JP2000025063A (ja) 発泡成形体の製造方法
JPH09234756A (ja) 発泡性熱可塑性樹脂シート及び発泡体の製造方法
JP2004352885A (ja) 架橋高分子材料を用いた多孔質成形体及びその製造方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination