CN106317550B - A kind of foam pad and preparation method thereof - Google Patents
A kind of foam pad and preparation method thereof Download PDFInfo
- 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
- Authority
- CN
- China
- Prior art keywords
- base layer
- foam pad
- preparation
- raw material
- film layer
- 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.)
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- 239000006260 foam Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000005187 foaming Methods 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims description 96
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 52
- 239000002994 raw material Substances 0.000 claims description 40
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 27
- 239000001569 carbon dioxide Substances 0.000 claims description 26
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical group CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 21
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 21
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 15
- 238000003475 lamination Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 9
- 239000002667 nucleating agent Substances 0.000 claims description 8
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical group [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
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- 239000000126 substance Substances 0.000 claims description 5
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- 150000008065 acid anhydrides Chemical class 0.000 claims 1
- 125000006850 spacer group Chemical group 0.000 abstract description 20
- 235000013305 food Nutrition 0.000 abstract description 9
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
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- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
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- 230000006872 improvement Effects 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
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- 238000012360 testing method Methods 0.000 description 2
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- 235000014101 wine Nutrition 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
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- 238000012797 qualification Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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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
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Sealing Material Composition (AREA)
- Molding Of Porous Articles (AREA)
- Closures For Containers (AREA)
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
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。
Priority Applications (5)
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CN201610663089.9A CN106317550B (en) | 2016-08-12 | 2016-08-12 | A kind of foam pad and preparation method thereof |
PCT/CN2016/111474 WO2018028111A1 (en) | 2016-08-12 | 2016-12-22 | Foam pad and preparation method therefor |
DE112016000112.6T DE112016000112T5 (en) | 2016-08-12 | 2016-12-22 | Foam seal and manufacturing method thereof |
FR1752338A FR3054974B1 (en) | 2016-08-12 | 2017-03-22 | FOAM JOINT AND PREPARATION METHOD THEREOF |
GB1704539.4A GB2552865B (en) | 2016-08-12 | 2017-03-22 | Foam gasket and preparation method thereof |
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CN201610663089.9A CN106317550B (en) | 2016-08-12 | 2016-08-12 | A kind of foam pad and preparation method thereof |
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CN106317550A CN106317550A (en) | 2017-01-11 |
CN106317550B true CN106317550B (en) | 2019-01-18 |
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CN (1) | CN106317550B (en) |
DE (1) | DE112016000112T5 (en) |
FR (1) | FR3054974B1 (en) |
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WO (1) | WO2018028111A1 (en) |
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CN106317550B (en) * | 2016-08-12 | 2019-01-18 | 江苏锦厚新材料科技有限公司 | A kind of foam pad and preparation method thereof |
GB2570873B (en) * | 2018-02-01 | 2023-03-22 | Douwe Egberts Bv | Container lid and liner, and method of manufacturing the same |
KR102040237B1 (en) * | 2018-06-28 | 2019-11-06 | 주식회사 휴비스 | A molded product having gas barrier layer, A packaging container comprising the same, and Method for preparing the molded product |
CN109627482A (en) * | 2018-10-24 | 2019-04-16 | 佛山市高明科力机械有限公司 | The production line and production technology of supercritical carbon dioxide physical blowing PE environmental-protection sealing gasket product |
CN109370018A (en) * | 2018-11-12 | 2019-02-22 | 王诚 | A kind of plastic sealing strip suitable for aseptic packaging |
CN110757811A (en) * | 2019-10-29 | 2020-02-07 | 上海允泉新材料科技有限公司 | Sportswear composition and method for producing the same |
CN112812355B (en) * | 2020-12-31 | 2022-09-23 | 厦门天生爱科技有限公司 | Functional polymer foaming material with slow-release volatile Chinese herbal medicine effective components, preparation method and application |
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GB201704539D0 (en) | 2017-05-03 |
GB2552865B (en) | 2018-11-21 |
DE112016000112T5 (en) | 2018-04-19 |
FR3054974A1 (en) | 2018-02-16 |
CN106317550A (en) | 2017-01-11 |
WO2018028111A1 (en) | 2018-02-15 |
FR3054974B1 (en) | 2020-06-05 |
GB2552865A (en) | 2018-02-14 |
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