CN106317550B - A kind of foam pad and preparation method thereof - Google Patents

A kind of foam pad and preparation method thereof Download PDF

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Publication number
CN106317550B
CN106317550B CN201610663089.9A CN201610663089A CN106317550B CN 106317550 B CN106317550 B CN 106317550B CN 201610663089 A CN201610663089 A CN 201610663089A CN 106317550 B CN106317550 B CN 106317550B
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China
Prior art keywords
base layer
foam pad
preparation
raw material
film layer
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CN201610663089.9A
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Chinese (zh)
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CN106317550A (en
Inventor
王衍萍
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Wuxi Lixing Investment Consulting Co ltd
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Jiangsu Jin Thick New Mstar Technology Ltd
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Priority to CN201610663089.9A priority Critical patent/CN106317550B/en
Priority to DE112016000112.6T priority patent/DE112016000112T5/en
Priority to PCT/CN2016/111474 priority patent/WO2018028111A1/en
Publication of CN106317550A publication Critical patent/CN106317550A/en
Priority to GB1704539.4A priority patent/GB2552865B/en
Priority to FR1752338A priority patent/FR3054974B1/en
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    • 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
    • C08L23/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/06—Making multilayered 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/22—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/24—Making multilayered 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • 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
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/505—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through a flat die
    • 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
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints
    • B29L2031/265—Packings, Gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B32B2250/242—All polymers belonging to those covered by group B32B27/32
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0207—Materials belonging to B32B25/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/10—Composition of foam characterised by the foam pores
    • B32B2266/102—Nanopores, i.e. with average diameter smaller than 0.1 µm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/10—Composition of foam characterised by the foam pores
    • B32B2266/104—Micropores, i.e. with average diameter in the range from 0.1 µm to 0.1 mm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/10—Composition of foam characterised by the foam pores
    • B32B2266/106—Unimodal pore distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
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    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2435/00—Closures, end caps, stoppers
    • B32B2435/02—Closures, end caps, stoppers for containers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/14—Applications used for foams
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • 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
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Abstract

The present invention provides a kind of foam pad and preparation method thereof, the foam pad includes base layer and the film layer for being covered in base layer upper and lower surfaces, and the base layer is foaming body, and is the poroid body of uniform capillary, and the average pore size of the pore is 1-100 μm；The even film layer is fine and close；The preparation method of the foam pad includes supercritical foaming process and coating technique.The foam pad flexibility, flexibility and elasticity is good, are food grade plastic piece, have excellent leakproofness for Bottle cap spacer, and preparation method is simple, are convenient for industrial applications.

Description

A kind of foam pad and preparation method thereof
Technical field
The invention belongs to the high security fields technical field such as food packaging, Key works Drug packing, it is related to a kind of foam pad and its system A kind of gasket seal and preparation method thereof on Preparation Method more particularly to bottle cap.
Background technique
Bottle cap spacer be using rubber skin, copper sheet or paper, for be put between two planes to reinforce sealing material, Have the function of preventing fluid from leaking.With economic continuous development, Bottle cap spacer is widely used in drinks, food, makeup In the industries such as product, drug.
According to related news, the demand of China's Wines packing and beverage class packaging to Bottle cap spacer increasingly increases at present, And the Bottle cap spacer that Wines packing uses accounts for Bottle cap spacer and uses 70% of total amount or more.With China's drinks and beverage industry Fast development, Bottle cap spacer industry gradually emerge.The production of China's Bottle cap spacer in 2014 compares the rise of 2013 year-on-years 14%, this huge demand does not simply pull on Bottle cap spacer price and rises all the way, also makes the quantity of Bottle cap spacer manufacturer fast Speed increases.Currently, China has become the maximum Bottle cap spacer country of consumption in the whole world and exported country.
Up to several hundred kinds of the product in China Bottle cap spacer market, the Bottle cap spacer of various model specifications and type is flooded with food Product packing container market.Currently, the gasket being used in food packaging has PVC (polyvinyl chloride), PE (polyethylene), returns power glue The materials such as pad, aluminium foil Composition spacer, paper aluminium Composition spacer, wherein based on PVC, PE material.
CN 104250404A discloses a kind of jar cap gasket pellet and preparation method thereof, the jar cap gasket It is formulated according to the mass fraction pellet, including 30-50 parts of polypropylene, 30-50 parts of polyethylene, 10-30 parts of thermoplastic elastomer (TPE), adds 0.4-5 parts of work auxiliary agent, above-mentioned raw materials are mixed through high mixer, extruder squeezes out, cooling, pelletizing obtains jar cap gasket pellet.It should Jar cap gasket pellet uses safe and non-toxic raw material completely, does not add the plasticizer such as the adjacent benzene class being harmful to the human body, both full Foot food can package Bottle cap spacer pellet safe and non-toxic demand has excellent leakproofness again.
CN 1465507A discloses a kind of bottle cap material and its application on heat filling beverage plastic bottle closure, leads to Cross maleic acid modified EVA (ethylene-vinyl acetate copolymer), SEBS (hydrogenated styrene diene copolymer), hydrowax oil, The combination of branch-like low density polyethylene (LDPE), polypropylene, polystyrene and low molecule lubricant is constituted, and is contained containing VA (vinyl acetate) Ethylene-alpha-olefin copolymer, weight ratio 90-35% is added in EVA, the weight ratio 5-60% that amount is 18%.The material is to pass It is unexistent in the cover lining cushion material of system.Inner pad material made from this blending and existing beverage packing plastic bottle lid inner pad material It compares, there is excellent performance, gasket material is not only cheap, and than traditional hot filling drink plastic bottle closure inner pad material Effect is good.
But existing Bottle cap spacer, it still needs further improvement for leakproofness.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of foam pad and preparation method thereof, institute It states foam pad flexibility, flexibility and elasticity is good, be food grade plastic piece, there is excellent leakproofness for Bottle cap spacer, and And preparation method is simple, is convenient for industrial applications.
1bar=0.1MPa.
To achieve this purpose, the present invention adopts the following technical scheme:
One of the objects of the present invention is to provide a kind of foam pad, the foam pad includes base layer and is covered in base layer The film layer of upper and lower surfaces, the base layer are foaming body, and are the poroid body of uniform capillary, the average hole of the pore Diameter be 1-100 μm, such as 2 μm, 5 μm, 8 μm, 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 80 μm, 90 μm or 95 μm etc.；The even film layer is fine and close；
The base layer is mainly prepared by the following raw material by mass percentage:
PE (polyethylene) 0-90%, such as 2%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% or 85% etc.；
PP (polypropylene) 0-90%, such as 2%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% or 85% etc.；
POE (ethylene-octene copolymer), SBS (block copolymer of styrene and butadiene) or SEBS (hydrogenation of benzene second Alkene-butadiene block copolymer) in any one or at least two combination 0-20% (do not include 0), such as 0.5%, 1%, 2%, 3%, 5%, 6%, 8%, 10%, 12%, 15% or 18% etc.；
Release agent 0.2-1.0%, such as 0.3%, 0.5%, 0.6%, 0.7%, 0.8% or 0.9%；
Nucleating agent 0.1-2.5%, such as 0.3%, 0.5%, 0.8%, 1.0%, 1.2%, 1.5%, 1.8%, 2.0% or 2.3% etc.；
Color masterbatch 0-2.0%, such as 0.1%, 0.5%, 0.8%, 1.0%, 1.2%, 1.3%, 1.5%, 1.7% or 1.9% Deng；
Wherein, at most a kind of mass percentage of substance is 0 in PE and PP；The combination of POE, SBS or SEBS such as, POE With SBS, POE and SEBS, POE, SBS and SEBS.
The film layer is mainly prepared by the following raw material by mass percentage:
PE 0-93%, such as 2%, 3%, 5%, 10%, 20%, 30%, 50%, 60%, 70%, 80% or 90%；
PP 0-95%, such as 1%, 3%, 5%, 8%, 10%, 20%, 30%, 50%, 60%, 80% or 90%；
POE 0-93%, such as 2%, 3%, 5%, 10%, 20%, 30%, 50%, 60%, 70%, 80% or 90%；
Tackifier 0-30%, such as 1%, 3%, 5%, 8%, 10%, 12%, 15%, 18%, 20%, 23%, 25% or 28% etc.；
Release agent 0.2-1.1%, such as 0.3%, 0.5%, 0.8% or 1.0%；
Opening agent 0.1-3.0%, such as 0.3%, 0.5%, 0.8%, 1.0%, 1.2%, 1.5%, 1.8%, 2.0%, 2.1%, 2.3%, 2.5% or 2.8% etc.；
Wherein, at most a kind of mass percentage of substance is 0 in PE, PP and POE.
The base layer is that the poroid body of uniform capillary refers to that the base layer includes multiple pores.
The base layer is prepared by mass percentage by the following raw material as a preferred technical solution:
Preferably, the release agent is selected from oleamide, erucyl amide or oleamide with erucyl amide production with PE PP be carrier masterbatch in any one or at least two combination.It is typical but non-limiting combination as oleamide with Erucyl amide, oleamide and oleamide are with erucyl amide production using PE or PP as the masterbatch of carrier, erucyl amide and oil Sour amide is with erucyl amide production using PE or PP as the masterbatch of carrier.
Preferably, the nucleating agent is selected from using sodium bicarbonate, citric acid as principle active component, is with PE or PP or EVA The masterbatch of carrier.
The film layer is mainly prepared by the following raw material by mass percentage as a preferred technical solution:
Preferably, the tackifier appointing in EEA (ethylene ethyl acrylate), polyester or maleic anhydride grafted resin It anticipates a kind of or at least two combinations.Typical but non-limiting combination such as EEA and polyester, EEA and maleic anhydride grafted resin, EEA, polyester and maleic anhydride grafted resin.
Preferably, the release agent is selected from oleamide, erucyl amide or oleamide with erucyl amide production with PE PP be carrier masterbatch in any one or at least two combination.It is typical but non-limiting combination as oleamide with Erucyl amide, oleamide and oleamide are with erucyl amide production using PE or PP as the masterbatch of carrier, erucyl amide and oil Sour amide is with erucyl amide production using PE or PP as the masterbatch of carrier.
Preferably, the opening agent is selected from erucyl amide.
The base layer with a thickness of 0.5-10.0mm, as 0.8mm, 1.0mm, 1.5mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm or 9.0mm etc..Blocked up, then the application performances such as material sealing performance do not ensure；It is excessively thin, then material Flexibility, to make up performance inadequate for cooperation.
Preferably, the density of the base layer is 100-800kg/m3, such as 150kg/m3、200kg/m3、300kg/m3、 400kg/m3、500kg/m3、600kg/m3Or 700kg/m3Deng.
For the base layer due to passing through overcritical physical blowing, crosslinking leakproofness is excellent.
Preferably, the film layer with a thickness of 0.02-0.15mm, such as 0.05mm, 0.08mm, 0.10mm, 0.12mm or 0.14mm etc..The flexibility of the blocked up then material of film layer, it is inadequate that cooperation makes up performance, the application such as excessively thin then material sealing performance of film layer Performance does not ensure.The film layer with a thickness of 0.02-0.15mm refer to base layer upper surface film layer thickness and lower surface The thickness of film layer independently is 0.02-0.15mm.
While the film layer makes the foam pad have good flexible fit, also meets sealing function and want It asks.
An object of the present invention, which also resides in, provides a kind of preparation method of foam pad as described above, the preparation method Include the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with supercritical carbon dioxide, through extrusion foaming, obtains base layer, the supercritical carbon dioxide is 50-220bar pressure Under supercritical carbon dioxide, as 60bar, 80bar, 90bar, 100bar, 120bar, 150bar, 180bar or 200bar press Supercritical carbon dioxide under power；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, is obtained described Foam pad.
Step (1) single screw extrusion machine is the single screw extrusion machine with the cooling voltage endurance of heating, typical but non- The foaming machine of restrictive single screw extrusion machine such as Berstorff Co., Ltd manufacture: 150-ISO-PAC.
Host temperature≤65 DEG C of pressure-resistant single screw extrusion machine unit, such as 63 DEG C, 60 in step (1) described extrusion process DEG C, 58 DEG C, 55 DEG C, 50 DEG C, 45 DEG C or 30 DEG C etc., host temperature is excessively high, then causes unit to damage.
Preferably, step (1) extrusion temperature be 90-210 DEG C, such as 100 DEG C, 110 DEG C, 130 DEG C, 150 DEG C, 180 DEG C, 190 DEG C or 200 DEG C etc., extrusion temperature is high, then film mouldability is bad, became uneven, and foaming is uneven；Extrusion temperature is low, then film Foaming is uneven or can not foam.
Preferably, in step (1) described extrusion process screw rod revolving speed be 1-100rpm, as 2rpm, 3rpm, 5rpm, 10rpm, 20rpm, 30rpm, 40rpm, 50rpm, 60rpm, 70rpm, 80rpm or 90rpm etc..
Preferably, the pressure-bearing range of step (1) described single screw extrusion machine be 0-250bar, as 2bar, 5bar, 10bar, 20bar, 50bar, 100bar, 120bar, 150bar, 180bar, 200bar, 220bar or 240bar etc..
The flow of step (1) described supercritical carbon dioxide be 0.10-2.50kg/h, as 0.3kg/h, 0.5kg/h, The flow of 0.8kg/h, 1.0kg/h, 1.2kg/h, 1.5kg/h, 1.8kg/h, 2.0kg/h or 2.3kg/h etc., carbon dioxide are high, Then film foaming is uneven, foaming is excessive, elastic properties of materials failure；Flow is low, then foams too low, flexibility is inadequate.
Preferably, step (1) the base layer with a thickness of 0.5-10.0mm, as 0.8mm, 1.0mm, 1.5mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 8.0mm or 9.0mm etc..
Preferably, the density of step (1) the base layer is 100-800kg/m3, such as 150kg/m3、200kg/m3、 300kg/m3、400kg/m3、500kg/m3、600kg/m3Or 700kg/m3Deng.
The temperature of step (2) described extrusion be 80-250 DEG C, such as 85 DEG C, 90 DEG C, 95 DEG C, 100 DEG C, 120 DEG C, 130 DEG C, 150 DEG C, 180 DEG C, 200 DEG C, 210 DEG C, 220 DEG C or 240 DEG C etc..
Preferably, in step (2) described extrusion process screw rod revolving speed be 1-100rpm, as 2rpm, 3rpm, 5rpm, 10rpm, 20rpm, 30rpm, 40rpm, 50rpm, 60rpm, 70rpm, 80rpm or 90rpm etc..
Step (2) the base layer overlay film is with a thickness of 0.02-0.15mm, such as 0.05mm, 0.08mm, 0.10mm, 0.12mm Or 0.14mm etc..
Lamination in step (2) can carry out function film production according to downstream application demand.
The preparation method includes the following steps: as a preferred technical solution,
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with the supercritical carbon dioxide under 50-220bar pressure, and the flow of supercritical carbon dioxide is 0.10-2.50kg/h, warp It squeezes out, obtaining density is 100-800kg/m3, with a thickness of the base layer of 0.5-10.0mm, wherein the list in the extrusion process Host temperature≤65 DEG C of screw extruder；Extrusion temperature is 90-210 DEG C；The revolving speed of screw rod is 1-100rpm in extrusion process； The pressure-bearing range of the single screw extrusion machine is 0-250bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film With a thickness of the foam pad of 0.02-0.15mm, wherein the temperature of extrusion is 80-250 DEG C；The revolving speed of screw rod is 1- in extrusion process 100rpm。
Compared with prior art, the invention has the benefit that
Foam pad provided by the invention is made of base layer and film layer, and base layer is foamed to be made, and crosslinking leakproofness is preferable, And flexibility, flexibility and elasticity are preferably, and the film layer of surface covering makes the foam pad have good flexible fit Property while, also meet sealing function requirement, Shore A hardness 35-50, for Bottle cap spacer with excellent leakproofness And good unlatching performance, and have the function of bonding and improve flatness, in addition, it is food grade plastic piece；
The preparation method of foam pad provided by the invention is simple, is convenient for industrial applications.
Specific embodiment
The technical scheme of the invention is further explained by means of specific implementation.
In the preparation method of following embodiment, step (1) single screw extrusion machine is special with heating, cooling and pressure resistance Property single screw extrusion machine --- Berstorff Co., Ltd manufacture foaming machine: 150-ISO-PAC.
The thickness and following table of the upper surface film layer for referring to base layer with a thickness of a certain numerical value of film layer described in following embodiment The thickness of face mask layer independently is a certain numerical value.
Embodiment 1
A kind of foam pad, the foam pad include base layer and the film layer for being covered in base layer upper and lower surfaces, institute Stating base layer is foaming body, and is the poroid body of uniform capillary, and the average diameter of pore is 1-30 μm；The film layer is lamination Layer, even film layer are fine and close；The base layer with a thickness of 0.5mm；The film layer with a thickness of 0.02mm；
The base layer is mainly prepared by the following raw material by mass percentage:
The release agent is selected from oleamide；
The nucleating agent is selected from using sodium bicarbonate, citric acid as principle active component, using PE or PP or EVA as the mother of carrier Material.
The film layer is mainly prepared by the following raw material by mass percentage:
The tackifier are selected from EEA (ethylene ethyl acrylate).
The release agent is selected from oleamide.
The opening agent is selected from erucyl amide.
The preparation method of the foam pad includes the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with the supercritical carbon dioxide under 50bar pressure, and the flow of supercritical carbon dioxide is 2.50kg/h, through extrusion foaming, Obtain base layer, wherein 65 DEG C of the host temperature of the single screw extrusion machine in the extrusion process；Extrusion temperature is 210 DEG C；It squeezes The revolving speed of screw rod is 1rpm during out；The pressure-bearing range of the single screw extrusion machine is 250bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film With a thickness of the foam pad of 0.02mm, wherein the temperature of extrusion is 80 DEG C；The revolving speed of screw rod is 100rpm in extrusion process.
Embodiment 2
A kind of foam pad, the foam pad include base layer and the film layer for being covered in base layer upper and lower surfaces, institute Stating base layer is foaming body, and is the poroid body of uniform capillary, and the average diameter of pore is 50-100 μm；The film layer is lamination Layer, even film layer are fine and close；The base layer with a thickness of 10.0mm；The film layer with a thickness of 0.15mm；
The base layer is mainly prepared by the following raw material by mass percentage:
The release agent is selected from oleamide and erucyl amide.
Preferably, the nucleating agent is selected from using sodium bicarbonate, citric acid as principle active component, is with PE or PP or EVA The masterbatch of carrier.
The film layer is mainly prepared by the following raw material by mass percentage:
The tackifier are selected from EEA and polyester.
The release agent is selected from oleamide with erucyl amide production using PE or PP as the masterbatch of carrier.
The opening agent is selected from erucyl amide.
The preparation method of the foam pad includes the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with the supercritical carbon dioxide under 220bar pressure, and the flow of supercritical carbon dioxide is 0.10kg/h, through extrusion foaming, Obtain base layer, wherein the host temperature 50 C of the single screw extrusion machine in the extrusion process；Extrusion temperature is 90 DEG C；It squeezes The revolving speed of screw rod is 100rpm during out；The pressure-bearing range of the single screw extrusion machine is 100bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film With a thickness of the foam pad of 0.15mm, wherein the temperature of extrusion is 250 DEG C；The revolving speed of screw rod is 1rpm in extrusion process.
Embodiment 3
A kind of foam pad, the foam pad include base layer and the film layer for being covered in base layer upper and lower surfaces, institute Stating base layer is foaming body, and is the poroid body of uniform capillary, and the average diameter of pore is 30-80 μm；The film layer is lamination Layer, even film layer are fine and close；The base layer with a thickness of 5.0mm；The film layer with a thickness of 0.10mm；
The base layer is mainly prepared by the following raw material by mass percentage:
The release agent is selected from erucyl amide.
Preferably, the nucleating agent is selected from using sodium bicarbonate, citric acid as principle active component, is with PE or PP or EVA The masterbatch of carrier.
The film layer is mainly prepared by the following raw material by mass percentage:
The tackifier are selected from maleic anhydride grafted resin.
The release agent is selected from oleamide with erucyl amide production using PE or PP as the masterbatch of carrier.
The opening agent is selected from erucyl amide.
The preparation method of the foam pad includes the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with the supercritical carbon dioxide under 100bar pressure, and the flow of supercritical carbon dioxide is 1.00kg/h, through extrusion foaming, Obtain base layer, wherein the host temperature 60 C of the single screw extrusion machine in the extrusion process；Extrusion temperature is 120 DEG C；It squeezes The revolving speed of screw rod is 20rpm during out；The pressure-bearing range of the single screw extrusion machine is 120bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film With a thickness of the foam pad of 0.10mm, wherein the temperature of extrusion is 100 DEG C；The revolving speed of screw rod is 20rpm in extrusion process.
Embodiment 4
A kind of foam pad, the foam pad include base layer and the film layer for being covered in base layer upper and lower surfaces, institute Stating base layer is foaming body, and is the poroid body of uniform capillary, and the average diameter of pore is 1-30 μm；The film layer is lamination Layer, even film layer are fine and close；The base layer with a thickness of 3.0mm；The film layer with a thickness of 0.05mm；
The base layer is mainly prepared by the following raw material by mass percentage:
The release agent is selected from oleamide with erucyl amide production using PE or PP as the masterbatch of carrier.
The nucleating agent is selected from using sodium bicarbonate, citric acid as principle active component, using PE or PP or EVA as the mother of carrier Material.
The film layer is mainly prepared by the following raw material by mass percentage:
Preferably, the tackifier are selected from the group that EEA, polyester and maleic anhydride grafted resin are 1:1:1 according to mass ratio It closes.
The release agent is selected from oleamide.
The opening agent is selected from erucyl amide.
The preparation method of the foam pad includes the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with the supercritical carbon dioxide under 150bar pressure, and the flow of supercritical carbon dioxide is 2.0kg/h, through extrusion foaming, Obtain base layer, wherein 55 DEG C of the host temperature of the single screw extrusion machine in the extrusion process；Extrusion temperature is 170 DEG C；It squeezes The revolving speed of screw rod is 80rpm during out；The pressure-bearing range of the single screw extrusion machine is 150bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film With a thickness of the foam pad of 0.05mm, wherein the temperature of extrusion is 180 DEG C；The revolving speed of screw rod is 90rpm in extrusion process.
Embodiment 5
A kind of foam pad, the foam pad include base layer and the film layer for being covered in base layer upper and lower surfaces, institute Stating base layer is foaming body, and is the poroid body of uniform capillary, and the average diameter of pore is 1-100 μm；The film layer is lamination Layer, even film layer are fine and close；The base layer with a thickness of 3.0mm；The film layer with a thickness of 0.05mm；
The base layer is mainly prepared by the following raw material by mass percentage:
The release agent is selected from oleamide.
The nucleating agent is selected from using sodium bicarbonate, citric acid as principle active component, using PE or PP or EVA as the mother of carrier Material.
The film layer is mainly prepared by the following raw material by mass percentage:
The tackifier are selected from maleic anhydride grafted resin.
The release agent is selected from oleamide with erucyl amide production using PE or PP as the masterbatch of carrier.
The opening agent is selected from erucyl amide.
The preparation method of the foam pad includes the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while into single screw extrusion machine Portion is filled with the supercritical carbon dioxide under 150bar pressure, and the flow of supercritical carbon dioxide is 2.0kg/h, through extrusion foaming, Obtain base layer, wherein 55 DEG C of the host temperature of the single screw extrusion machine in the extrusion process；Extrusion temperature is 170 DEG C；It squeezes The revolving speed of screw rod is 80rpm during out；The pressure-bearing range of the single screw extrusion machine is 150bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film With a thickness of the foam pad of 0.05mm, wherein the temperature of extrusion is 180 DEG C；The revolving speed of screw rod is 90rpm in extrusion process.
Comparative example 1
The comparative example 1 is base layer made from embodiment 3.
Comparative example 2
The comparative example 2 is commercially available PE gasket (manufacturer: upper hamming deep pool Plastic Products Co., Ltd).
Comparative example 3
A kind of foam pad and preparation method thereof, in addition to the flow of supercritical carbon dioxide is 0.08kg/h, remaining and implementation Example 5 is identical.
Comparative example 4
A kind of foam pad and preparation method thereof, in addition to the flow of supercritical carbon dioxide is 2.60kg/h, remaining and implementation Example 5 is identical.
The obtained product of embodiment 1-5 and comparative example 1-4 is tested for the property, the test method of density is GB1033, Flexible test method is perception test, and the test method of shore hardness is GB2411, and the test method of leakproofness is self-control Permeability method (fills the vial of edible oil with the bottle cap sealing that foam pad makes, side is put on the platform for being covered with blank sheet of paper, after 10 days Observe blank sheet of paper on whether permeability, permeability be it is unqualified, it is oil-tight for qualification).Test result is as follows shown in table 1:
Table 1
As it can be seen that foam pad provided by the invention, has excellent performance, the sealing performance for Bottle cap spacer is splendid.In addition, this The foam pad provided is provided, reaches food-grade requirement, can be widely used for the high security fields such as food packaging, Key works Drug packing.
The Applicant declares that the present invention is explained by the above embodiments method detailed of the invention, but the present invention not office Be limited to above-mentioned method detailed, that is, do not mean that the invention must rely on the above detailed methods to implement.Technical field Technical staff it will be clearly understood that any improvement in the present invention, equivalence replacement and auxiliary element to each raw material of product of the present invention Addition, selection of concrete mode etc., all of which fall within the scope of protection and disclosure of the present invention.

Claims (22)

1. a kind of foam pad, which is characterized in that the foam pad includes base layer and is covered in base layer upper and lower surfaces Film layer, the base layer is foaming body, and is the poroid body of uniform capillary, and the average pore size of the pore is 1-100 μm；
The base layer is mainly prepared by the following raw material by mass percentage:
Wherein, at most a kind of mass percentage of substance is 0 in PE and PP；
The film layer is mainly prepared by the following raw material by mass percentage:
Wherein, at most a kind of mass percentage of substance is 0 in PE, PP and POE.
2. a kind of foam pad, which is characterized in that the foam pad includes base layer and is covered in base layer upper and lower surfaces Film layer, the base layer is foaming body, and is the poroid body of uniform capillary, and the average pore size of the pore is 1-100 μm；
The base layer is prepared by mass percentage by the following raw material:
The film layer is mainly prepared by the following raw material by mass percentage:
Wherein, at most a kind of mass percentage of substance is 0 in PE, PP and POE.
3. foam pad according to claim 1 or 2, which is characterized in that the release agent is selected from oleamide, erucyl amide Or oleamide and erucyl amide production using PE or PP as in the masterbatch of carrier any one or at least two combination.
4. foam pad according to claim 1 or 2, which is characterized in that the nucleating agent is selected from sodium bicarbonate, citric acid For principle active component, using PE or PP or EVA as the masterbatch of carrier.
5. foam pad according to claim 1 or 2, which is characterized in that the film layer is by mass percentage mainly by such as Lower raw material is prepared:
6. foam pad according to claim 1 or 2, which is characterized in that the tackifier are selected from EEA, polyester or maleic acid In acid anhydride graft resin any one or at least two combination.
7. foam pad according to claim 1 or 2, which is characterized in that the opening agent is selected from erucyl amide.
8. foam pad according to claim 1 or 2, which is characterized in that the base layer with a thickness of 0.5-10.0mm.
9. foam pad according to claim 1 or 2, which is characterized in that the density of the base layer is 100-800kg/m3。
10. foam pad according to claim 1 or 2, which is characterized in that the film layer with a thickness of 0.02-0.15mm.
11. the preparation method of foam pad according to claim 1 or 2, which is characterized in that the preparation method includes as follows Step:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while is filled to single screw extrusion machine middle part Enter supercritical carbon dioxide, through extrusion foaming, obtains base layer, the supercritical carbon dioxide is under 50-220bar pressure Supercritical carbon dioxide；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains the foaming Pad.
12. preparation method according to claim 11, which is characterized in that pressure resistance list spiral shell in step (1) described extrusion process Host temperature≤65 DEG C of bar extruder unit.
13. preparation method according to claim 11, which is characterized in that step (1) extrusion temperature is 90-210 DEG C.
14. preparation method according to claim 11, which is characterized in that screw rod turns in step (1) described extrusion process Speed is 1-100rpm.
15. preparation method according to claim 11, which is characterized in that the pressure-bearing of step (1) described single screw extrusion machine Range is 0-250bar.
16. preparation method according to claim 11, which is characterized in that the stream of step (1) described supercritical carbon dioxide Amount is 0.10-2.50kg/h.
17. preparation method according to claim 11, which is characterized in that step (1) the base layer with a thickness of 0.5- 10.0mm。
18. preparation method according to claim 11, which is characterized in that the density of step (1) the base layer is 100- 800kg/m3。
19. preparation method according to claim 11, which is characterized in that the temperature of step (2) described extrusion is 80-250 ℃。
20. preparation method according to claim 11, which is characterized in that screw rod turns in step (2) described extrusion process Speed is 1-100rpm.
21. preparation method according to claim 11, which is characterized in that step (2) the base layer overlay film with a thickness of 0.02-0.15mm。
22. preparation method according to claim 11, which is characterized in that the preparation method includes the following steps:
(1) the base layer raw material of formula ratio is sent into the hopper of single screw extrusion machine, while is filled to single screw extrusion machine middle part Enter the supercritical carbon dioxide under 50-220bar pressure, the flow of supercritical carbon dioxide is 0.10-2.50kg/h, through squeezing out Foaming, obtaining density is 100-800kg/m3, with a thickness of the base layer of 0.5-10.0mm, wherein the list in the extrusion process Host temperature≤65 DEG C of screw extruder；Extrusion temperature is 90-210 DEG C；The revolving speed of screw rod is 1-100rpm in extrusion process； The pressure-bearing range of the single screw extrusion machine is 0-250bar；
(2) the film layer raw material of formula ratio is sent into single screw extrusion machine hopper, in matrix layer surface lamination, obtains overlay film thickness For the foam pad of 0.02-0.15mm, wherein the temperature of extrusion is 80-250 DEG C；The revolving speed of screw rod is 1- in extrusion process 100rpm。
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DE112016000112.6T DE112016000112T5 (en) 2016-08-12 2016-12-22 Foam seal and manufacturing method thereof
PCT/CN2016/111474 WO2018028111A1 (en) 2016-08-12 2016-12-22 Foam pad and preparation method therefor
GB1704539.4A GB2552865B (en) 2016-08-12 2017-03-22 Foam gasket and preparation method thereof
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