CN109233257A - Open-celled polyurethane foam body and preparation method thereof, application - Google Patents
Open-celled polyurethane foam body and preparation method thereof, application Download PDFInfo
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- CN109233257A CN109233257A CN201810630726.1A CN201810630726A CN109233257A CN 109233257 A CN109233257 A CN 109233257A CN 201810630726 A CN201810630726 A CN 201810630726A CN 109233257 A CN109233257 A CN 109233257A
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- polyurethane foam
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
-
- 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
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/482—Mixtures of polyethers containing at least one polyether containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0085—Use of fibrous compounding ingredients
-
- 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
- B32B2266/0278—Polyurethane
-
- 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
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- 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
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
-
- 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
- B32B2509/00—Household appliances
- B32B2509/10—Refrigerators or refrigerating equipment
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/05—Open cells, i.e. more than 50% of the pores are open
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
Abstract
The invention discloses open-celled polyurethane foam bodies and preparation method thereof, and inorfil or organic fiber is added as reinforcing fiber in open-cell polyurethane preparation；And in order to significantly improve the compatibility with polyalcohol, organic fiber is to process by ionization, and inorfil passes through coupling agent treatment, all has good dispersibility.The present invention further discloses above-mentioned open-celled polyurethane foam body and is preparing vacuum heat-insulating plate and in the application of refrigerator field.The open-celled polyurethane foam body that the embodiment of the present invention is prepared is high with percent opening, cell diameter is small, foam is fine and smooth, the good stability of the dimension of foam, the compressive strength of foam is high, it is not easy the advantages of collapsing, in this, as the core material of vacuum heat-insulating plate, it is low with thermal coefficient, light-weight, the high advantage of compressive strength.
Description
Technical field
The present invention relates to polyurethane foam plastics technical field, a kind of open-celled polyurethane foam body and its system are specifically provided
Preparation Method, application.
Background technique
In recent years, vacuum heat-insulating plate is due to its excellent low heat conductivity, small in size, and is widely used in refrigerator, refrigerator-freezer
In equal deep coolings industry.Vacuum insulation version is made of covering membrane material, core material and getter, and the heat-insulating property of core material is to vacuum
Heat-insulating shield has important influence, and for currently used core material mainly based on glass fibre, fibreglass maker skill is complicated,
Higher cost, and the vacuum heat-insulating plate weight prepared is big.
Open-cell polyurethane can substantially reduce the weight of vacuum heat-insulating plate because percent opening is high, intensity is big, light weight,
It is often chosen as the core material of vacuum heat-insulating plate, at present by the direct open-cell polyurethane of pyrolytic, it is big that there are abscesses, uneven
It is even, be easy the problems such as collapsing when vacuumizing.
When open-cell polyurethane is as core material of vacuum heat insulation plate, although its percent opening is higher, because percent opening is excessively high, lead
It causes its compressive strength to decline, leads to foam collapse because of vacuumizing when preparing vacuum heat-insulating plate, therefore enhance the poly- ammonia of aperture
The structural strength of ester has important meaning for preparing vacuum heat-insulating plate.
Summary of the invention
It is an object of the present invention to making up the deficiencies in the prior art, the low in cost, simple process of one kind and tool are provided
There is the open-celled polyurethane foam body and preparation method thereof of higher mechanical strength.
Another object of the present invention is to provide application of the open-celled polyurethane foam body in vacuum heat-insulating plate preparation.
Embodiments of the present invention first is that disclose a kind of open-celled polyurethane foam body, the open-celled polyurethane foam body
It is made of following raw material and weight fraction ratio is prepared:
The reinforcing fiber is the organic fiber or inorfil treated with coupling agent by ionization processing.
As the further improvement of the embodiment of the present invention, it is fine that the organic fiber is selected from polyethylene terephthalate
Dimension, polyacrylonitrile fibre, Fypro, polypropylene fibre, polyethylene fibre, polyimide fiber, vinal, carbon
At least one of fiber；
The diameter of the organic fiber is 1-10um, draw ratio 1-50.
As the further improvement of the embodiment of the present invention, it is fine that the inorfil is selected from asbestos fibre, glass fibre, boron
At least one of dimension, ceramic fibre；
The inorfil diameter is 1-10um, draw ratio 1-50.
As the further improvement of the embodiment of the present invention, the polyalcohol is by polyether glycol I, polyether glycol I I, poly-
Ethoxylated polyhydric alcohol III and polyether glycol I V composition；
The polyether glycol I is to be prepared using bisphenol-A and polyalcohol as initiator and oxyalkylene by addition reaction
It obtains；The polyalcohol is one of ethylene glycol, propylene glycol, diglycol, triethylene-glycol or a variety of；Polyethers is more
The viscosity of first alcohol I is 200-350mPas, and hydroxyl value is 160-300mg KOH/g, average functionality 2-3；
The polyether glycol I I is using at least one of glycerol, triethylol propane as initiator and oxyalkylene
It being prepared by addition reaction, the viscosity of polyether glycol I I is 400-800mPas, and hydroxyl value is 250-500mg KOH/g,
Average functionality is 2-3；
The polyether glycol I II is using at least one of alkane diamines, toluenediamine and pentaerythrite as starting
Agent and oxyalkylene are prepared by addition reaction；The carbon atom number of the alkane diamines is 6-10；The polyether polyols
The viscosity of alcohol III is 1000-2000mPas, hydroxyl value 350-500mgKOH/g, average functionality 3-5；
The polyether glycol I V is using one of xylitol, sucrose and diethylenetriamine as initiator and oxyalkylene
Hydrocarbon is prepared by addition reaction；The viscosity of the polyether glycol I V is 2000-4000mPas, hydroxyl value 350-
600mg KOH/g, average functionality 4-6.
As the further improvement of the embodiment of the present invention, the foaming agent is selected from pentamethylene, isopentane, pentafluoropropene
In the mixture foaming agent of (245fa), 1- chloro-3,3,3 ,-trifluoropropene (LBA), hexafluorobutene (FEA-1100) and water extremely
Few one kind.
As the further improvement of the embodiment of the present invention, the foam stabilizer is polydimethyl siloxane fluid.
As the further improvement of the embodiment of the present invention, the surfactant is poly- methyl-silicone oil.
As the further improvement of the embodiment of the present invention, the isocyanates is polymethylene multi-phenenyl isocyanate, different
Cyanic acid ester content is 30.5-32.0%, viscosity 150-250mPas.
Pore-creating agent is that one kind can reduce system surface tension and substance incompatible with system, is foamed in foamed material
Cheng Zhong, pore-creating agent can break the closed of abscess quickly, promote the aperture of abscess.
As the further improvement of the embodiment of the present invention, the pore-creating agent be selected from atoleine, polybutadiene, white carbon black,
At least one of dimethyl polysiloxane, polyoxyalkylene siloxane copolymer, polytetrafluoroethylene (PTFE).
As the further improvement of the embodiment of the present invention, the catalyst includes expansion type catalyst I, gel-type catalyst
II and trimerization type catalyst III；
Wherein, the expansion type catalyst I is dimethylaminoethoxyethanol；
Optionally, the gel-type catalyst II is hexamethyl trien, triethylenediamine, triethylamine, N-
One of (3- aminopropyl) imidazoles, N- (ethoxy) imidazoles, gelation catalyst comprising isocyanate reactive group are a variety of；
The excellent trimerization type catalyst III is (2- hydroxypropyl) trimethyl ammonium formate or pungent quaternary ammonium salt.
On the other hand, the embodiment of the invention also discloses the method for preparing above-mentioned open-celled polyurethane foam body, the sides
Method the following steps are included:
S1, polyalcohol, catalyst, foam stabilizer and reinforcing fiber are uniformly mixed under 20-25 DEG C, 1-2bar, are made the
One mixture；
S2, foaming agent is added in the first mixture, surfactant is added, and mix under 20-25 DEG C, 2-3bar
Uniformly, the second mixture is made；
S3, after isocyanates is added to the second mixture, third mixture is made；By third mixture in injection pressure
It is to be foamed and cured in 40-45 DEG C of mold to be injected into pre-temperature under conditions of 135bar, open-cell polyurethane hard bubble is made
Foam；
S4, the open-cell polyurethane rigid foam cooling and demolding that S3 is prepared, take out at a temperature of being subsequently placed in 120-150 DEG C
Vacuum further increases percent opening；
S5, the open-cell polyurethane rigid foam that S4 is prepared is cut according to vacuum insulation board size requirement, is obtained
To open-celled polyurethane foam body product.
The cell diameter for the open-celled polyurethane foam body prepared by the above material and above method is small, foam more refinement
It is greasy, and its compressive strength is preferable, percent opening reaches 98% or more, can satisfy the needs of core material of vacuum heat insulation plate.
In another aspect, the embodiment of the invention discloses the open-cell polyurethane prepared by the above material and above method bubbles
Foam body is preparing the application in vacuum heat-insulating plate.
Further, the embodiment of the invention discloses above-mentioned vacuum heat-insulating plate and its specific preparation methods.
The vacuum heat-insulating plate includes the core material of the open-celled polyurethane foam body preparation, the overlay film containing metal barrier
Material getter；
The vacuum heat-insulating plate includes first covering material and the second covering material with different material compositions, described
First covering material has different thermal coefficients from the second covering material.
The core material using above-mentioned prepared open-celled polyurethane foam body, be noteworthy characterized by percent opening reach 98% with
On, cell diameter is smaller, and foam is fine and smooth, and compressive strength is high, and light weight, is conducive to the weight for mitigating vacuum heat-insulating plate.
As the further improvement of the embodiment of the present invention, the covering material is selected from the plastic foil being hot-melted, reinforces
The nylon membrane of structural strength, the metal film with barrier gas effect and metal deposition film and outer layer have the work of protective effect
At least one of engineering plastics film.
Wherein, the heat fusion plastic foil refers to low density polyethylene (LDPE), branched polyethylene, at least one of polypropylene.
The nylon membrane includes at least one of PA-6, PA-66.
The film of the barrier gas is metal film and metal deposition film, it is preferable that selected metal is aluminium.
Selected engineering plastics film is polyethylene terephthalate (PET) film, has significant ground intensity, scratch resistance, resistance to
The effect of chemistry.
As the further improvement of the embodiment of the present invention, the covering material includes two different covering materials, including
First covering material and the second covering material, the first covering material are made of from the second covering material different materials, are had not
Same thermal coefficient, it is preferable that the first covering material is lower than the second covering material thermal coefficient.
Specifically, the first covering material includes polyethylene film (PE) (35um)/polyamide nylon PA66 (20um)/aluminium foil
(10um)/polyethylene terephthalate (PET) film (20um).
Optionally, the second covering material includes polyethylene film (PE) (35um)/polyamide nylon PA66 (20um)/aluminium
Deposit (0.5um)/polyethylene terephthalate (PET) film (20um).
First covering material and the second covering material are combined sealing by hot melt film hot melt, the first covering material and the
Two covering materials form covering material, form container, and core material is placed in one with getter, then by vacuumizing, reduce container
Interior vacuum degree reaches after formulating vacuum degree, and covering material is closed by hot melt film material hot melt and completes sealing.
Vacuum heat-insulating plate since its internal inside and outside differential pressure is very big, be easy to cause after of long duration gas to penetrate into vacuum exhausted
The inside of hot plate, reduces the vacuum degree of system, and then leads to the raising of the thermal coefficient of vacuum heat-insulating plate, reduces vacuum heat-insulating plate
Service life；And the presence of getter, can be improved or maintenance system in vacuum degree, extend vacuum heat-insulating plate use the longevity
Life.
As the further improvement of the embodiment of the present invention, the getter includes the object for adsorbing vapor and other gases
Matter, the general vapor that adsorbs includes selecting to use extensive, lower-cost calcium oxide, and the absorption of other gases is closed selected from Ba-Li
Gold.
The embodiment of the present invention further discloses the method for preparing above-mentioned vacuum heat-insulating plate, specifically includes the following steps:
S1, three sides of the first covering material and the second covering material are hot-melted, leave and take and form opening on one side, obtains
The packed double-deck covering material with edge sealing and opening；
S2, core material prepared by open-cell polyurethane is cut into specified size, is then added to S1 together with getter and obtains
The packed double-deck covering material, obtain preliminary product；
S3, the preliminary product for obtaining S2 vacuumize, until pressure is less than 1Pa, then by the packed double-deck overlay film material
Vacuum heat-insulating plate is prepared by heat fusion sealing in the opening of material.
It is another aspect of the present invention to provide a kind of refrigerator, the significant feature of this refrigerator includes that the vacuum of above-mentioned preparation is exhausted
Hot plate and polyurethane foaming layer；The thickness that insulating layer can be substantially reduced by increasing vacuum heat-insulating plate, improves the volume of refrigerator
Rate, while improving the heat insulation effect of refrigerator.
In other specific embodiments, the vacuum heat-insulating plate of above-mentioned preparation be can also be used in other household electrical appliances inside as guarantor
Adiabator.
The beneficial effect of the embodiment of the present invention is:
1) present invention is in system by adding reinforcing fiber, and preparing a kind of percent opening is more than 98%, compression performance and ruler
The open-celled polyurethane foam body that very little stability all significantly improves；
2) present invention prepares a kind of vacuum heat-insulating plate using open-cell polyurethane made above as core material, preparation it is true
Empty heat-insulating shield low, good stability of the dimension with thermal coefficient；
3) insulating layer of the vacuum heat-insulating plate disclosed by the embodiments of the present invention as refrigerator, so that refrigerator has heat insulation effect
The advantages that good, depth of foam reduces, plot ratio raising.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment
Technical scheme is clearly and completely described.Obviously, described embodiment is only that the application a part is implemented
Mode, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not being made
Every other embodiment obtained, shall fall in the protection scope of this application under the premise of creative work.
Embodiments of the present invention are described below in detail, embodiments described below is exemplary, and is only used for explaining
The present invention, and be not considered as limiting the invention.
Embodiments of the present invention first is that disclose a kind of open-celled polyurethane foam body, the open-celled polyurethane foam body by
Following raw material composition and weight fraction ratio are prepared:
Wherein, reinforcing fiber is the organic fiber or inorfil treated with coupling agent by ionization processing.
As the further improvement of the embodiment of the present invention, organic fiber is selected from pet fiber, gathers
Dralon, Fypro, polypropylene fibre, polyethylene fibre, polyimide fiber, vinal, carbon fiber
At least one of；
The diameter of organic fiber is 1-10um, draw ratio 1-50.
As the further improvement of the embodiment of the present invention, inorfil is selected from asbestos fibre, glass fibre, boron fibre, pottery
At least one of porcelain fiber；
Inorfil diameter is 1-10um, draw ratio 1-50.
As the further improvement of the embodiment of the present invention, polyalcohol is more by polyether glycol I, polyether glycol I I, polyethers
First alcohol III and polyether glycol I V composition；
Wherein, polyether glycol I is to be prepared using bisphenol-A and polyalcohol as initiator and oxyalkylene by addition reaction
It obtains；
Preferably, polyalcohol is one of ethylene glycol, propylene glycol, diglycol, triethylene-glycol or a variety of；
The viscosity of polyether glycol I is 200-350mPas, and hydroxyl value is 160-300mg KOH/g, average functionality 2-
3；
Further, polyether glycol I I is using at least one of glycerol, triethylol propane as initiator and oxygen
Change alkene to be prepared by addition reaction, the viscosity of polyether glycol I I is 400-800mPas, hydroxyl value 250-500mg
KOH/g, average functionality 2-3；
Further, polyether glycol I II be using at least one of alkane diamines, toluenediamine and pentaerythrite as
Initiator and oxyalkylene are prepared by addition reaction；The carbon atom number of alkane diamines is 6-10；Polyether glycol I II
Viscosity be 1000-2000mPas, hydroxyl value be 350-500mg KOH/g, average functionality 3-5；
Polyether glycol I V is logical using one of xylitol, sucrose and diethylenetriamine as initiator and oxyalkylene
Addition reaction is crossed to be prepared；The viscosity of polyether glycol I V is 2000-4000mPas, and hydroxyl value is 350-600mg KOH/g,
Average functionality is 4-6.
As the further improvement of the embodiment of the present invention, foaming agent be selected from pentamethylene, isopentane, pentafluoropropene (245fa),
At least one of 1- chloro-3,3,3 ,-trifluoropropene (LBA), hexafluorobutene (FEA-1100) and mixture foaming agent of water.
As the further improvement of the embodiment of the present invention, foam stabilizer is polydimethyl siloxane fluid.
As the further improvement of the embodiment of the present invention, surfactant is poly- methyl-silicone oil.
As the further improvement of the embodiment of the present invention, isocyanates is polymethylene multi-phenenyl isocyanate, isocyanic acid
Ester content is 30.5-32.0%, viscosity 150-250mPas.
Pore-creating agent is that one kind can reduce system surface tension and substance incompatible with system, is foamed in foamed material
Cheng Zhong, pore-creating agent can break the closed of abscess quickly, promote the aperture of abscess.
As the further improvement of the embodiment of the present invention, pore-creating agent is selected from atoleine, polybutadiene, white carbon black, diformazan
At least one of based polysiloxane, polyoxyalkylene siloxane copolymer, polytetrafluoroethylene (PTFE).
As the further improvement of the embodiment of the present invention, catalyst include expansion type catalyst I, gel-type catalyst II and
Trimerization type catalyst III；
Wherein, expansion type catalyst I is dimethylaminoethoxyethanol；
Optionally, gel-type catalyst II is hexamethyl trien, triethylenediamine, triethylamine, N- (3- ammonia
Propyl) imidazoles, N- (ethoxy) imidazoles, one of gelation catalyst comprising isocyanate reactive group or a variety of；
Trimerization type catalyst III is (2- hydroxypropyl) trimethyl ammonium formate or pungent quaternary ammonium salt.
On the other hand, the embodiment of the invention also discloses the method for preparing above-mentioned open-celled polyurethane foam body, the sides
Method the following steps are included:
S1, polyalcohol, catalyst, foam stabilizer and reinforcing fiber are uniformly mixed under 20-25 DEG C, 1-2bar, are made the
One mixture；
S2, foaming agent is added in the first mixture, surfactant is added, and mix under 20-25 DEG C, 2-3bar
Uniformly, the second mixture is made；
S3, after isocyanates is added to the second mixture, third mixture is made；By third mixture in injection pressure
It is to be foamed and cured in 40-45 DEG C of mold to be injected into pre-temperature under conditions of 135bar, open-cell polyurethane hard bubble is made
Foam；
S4, the open-cell polyurethane rigid foam cooling and demolding that S3 is prepared, take out at a temperature of being subsequently placed in 120-150 DEG C
Vacuum further increases percent opening；
S5, the open-cell polyurethane rigid foam that S4 is prepared is cut according to vacuum insulation board size requirement, is obtained
To open-celled polyurethane foam body product.
Wherein, reinforcing fiber is the organic fiber or inorfil treated with coupling agent by ionization processing.
When handling organic fiber, quaternary ammonium salt cationic modifying agent and high molecular quaternary cation modifier two can be selected
Kind cation modifier is modified processing to cellulose fibre, and modified cellulose fibre is obtained after the completion of modification；It is described
Small molecule quaternary ammonium salt cation modifying agent be epoxy quaternary ammonium salt epichlorohydrin parent derivative, the described high molecular quaternary sun
Ion modification agent is cationic starch.
Cellulose fibre is put into container, then adds water into container, the epichlorohydrin that epoxy quaternary ammonium salt is then first added is female
Sodium hydroxide is added after 5-10min in syntaxy object, is warming up to 45-55 DEG C, reacts 10-15min, adds cationic starch, with
After sodium hydroxide is added, be warming up to 65-85 DEG C, the reaction was continued；The total time of modification is 65-90min.
When handling inorfil, suitable coupling agent includes oligomer and other polymeric materials, such as modified starch, fiber
Plain ether and its derivative, the natural gum of modification, ketene dimer or poly- (vinyl alcohol).It may also comprise colloidal silica or colloid
POLARGEL NF.
The cell diameter for the open-celled polyurethane foam body prepared by the above material and above method is small, foam more refinement
It is greasy, and its compressive strength is preferable, percent opening reaches 98% or more, can satisfy the needs of core material of vacuum heat insulation plate.
In another aspect, the embodiment of the invention discloses the open-cell polyurethane prepared by the above material and above method bubbles
Foam body is preparing the application in vacuum heat-insulating plate.
Further, the embodiment of the invention discloses above-mentioned vacuum heat-insulating plate and its specific preparation methods.
Vacuum heat-insulating plate includes the core material of the open-celled polyurethane foam body preparation, the covering material containing metal barrier
Getter；
Vacuum heat-insulating plate includes first covering material and the second covering material with different material compositions, and described first
Covering material has different thermal coefficients from the second covering material.
Core material is noteworthy characterized by percent opening and is reached 98% or more using above-mentioned prepared open-celled polyurethane foam body,
Cell diameter is smaller, and foam is fine and smooth, and compressive strength is high, and light weight, is conducive to the weight for mitigating vacuum heat-insulating plate.
As the further improvement of the embodiment of the present invention, covering material is selected from the plastic foil with heat fusion, reinforcement structure
The nylon membrane of intensity, the metal film with barrier gas effect and metal deposition film and outer layer have the engineering plastic of protective effect
Expect at least one of film.
Wherein, heat fusion plastic foil refers to low density polyethylene (LDPE), branched polyethylene, at least one of polypropylene.
Nylon membrane includes at least one of PA-6, PA-66.
The film for obstructing gas is metal film and metal deposition film, it is preferable that selected metal is aluminium.
Engineering plastics film is polyethylene terephthalate (PET) film, has significant ground intensity, scratch resistance, chemically-resistant
Effect.
As the further improvement of the embodiment of the present invention, covering material includes two different covering materials, including first
Covering material and the second covering material, the first covering material are made of from the second covering material different materials, are had different
Thermal coefficient, it is preferable that the first covering material is lower than the second covering material thermal coefficient.
Specifically, the first covering material includes polyethylene film (PE) (35um)/polyamide nylon PA66 (20um)/aluminium foil
(10um)/polyethylene terephthalate (PET) film (20um).
Optionally, the second covering material includes polyethylene film (PE) (35um)/polyamide nylon PA66 (20um)/aluminium
Deposit (0.5um)/polyethylene terephthalate (PET) film (20um).
First covering material and the second covering material are combined sealing by hot melt film hot melt, the first covering material and the
Two covering materials form covering material, form container, and core material is placed in one with getter, then by vacuumizing, reduce container
Interior vacuum degree reaches after formulating vacuum degree, and covering material is closed by hot melt film material hot melt and completes sealing.
Vacuum heat-insulating plate since its internal inside and outside differential pressure is very big, be easy to cause after of long duration gas to penetrate into vacuum exhausted
The inside of hot plate, reduces the vacuum degree of system, and then leads to the raising of the thermal coefficient of vacuum heat-insulating plate, reduces vacuum heat-insulating plate
Service life；And the presence of getter, can be improved or maintenance system in vacuum degree, extend vacuum heat-insulating plate use the longevity
Life.
As the further improvement of the embodiment of the present invention, getter include adsorb vapor and other gases substance, one
As absorption vapor include selecting to use extensive, lower-cost calcium oxide, the absorption of other gases is selected from Ba-Li alloy.
The embodiment of the present invention further discloses the method for preparing above-mentioned vacuum heat-insulating plate, specifically includes the following steps:
S1, three sides of the first covering material and the second covering material are hot-melted, leave and take and form opening on one side, obtains
The packed double-deck covering material with edge sealing and opening；
S2, core material prepared by open-cell polyurethane is cut into specified size, is then added to S1 together with getter and obtains
The packed double-deck covering material, obtain preliminary product；
S3, the preliminary product for obtaining S2 vacuumize, until pressure is less than 1Pa, then by the packed double-deck overlay film material
Vacuum heat-insulating plate is prepared by heat fusion sealing in the opening of material.
It is another aspect of the present invention to provide a kind of refrigerator, the significant feature of this refrigerator includes that the vacuum of above-mentioned preparation is exhausted
Hot plate and polyurethane foaming layer；The thickness that insulating layer can be substantially reduced by increasing vacuum heat-insulating plate, improves the volume of refrigerator
Rate, while improving the heat insulation effect of refrigerator.
In other specific embodiments, the vacuum heat-insulating plate of above-mentioned preparation be can also be used in other household electrical appliances inside as guarantor
Adiabator.
Specifically, embodiment 1-9 disclose above-mentioned open-celled polyurethane foam body in the specific implementation raw material composition and again
Measure portion rate.
Embodiment 1
Embodiment 1 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.5 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of atoleine, 0.5 part of polytetrafluoroethylene (PTFE), 0 base of poly- diformazan
1 part of silicone oil, 145 parts of isocyanates, 0.5 part of polyethylene fibre；Wherein, polyethylene fibre 5-8um, draw ratio is in 20-30.
Embodiment 2
Embodiment 2 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 20 parts of dimethylaminoethoxyethanol, 2 parts of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of atoleine, 1 part of polytetrafluoroethylene (PTFE), poly dimethyl silicon
Oily 0.5 part, 145 parts of isocyanates, 1.8 parts of polyethylene fibre；Wherein, polyethylene fibre 5-8um, draw ratio is in 20-30.
Embodiment 3
Embodiment 3 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 30 parts of dimethylaminoethoxyethanol, 1 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of atoleine, 2 parts of polytetrafluoroethylene (PTFE), polyethylene fibre 3
Part, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Wherein, polyethylene fibre 5-8um, draw ratio is in 20-30.
Embodiment 4
Embodiment 4 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of polybutadiene, 1 part of polytetrafluoroethylene (PTFE), Fypro 1
Part, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Wherein, Fypro 6-10um, draw ratio is in 10-30.
Embodiment 5
Embodiment 5 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 20 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of polybutadiene, 1 part of polytetrafluoroethylene (PTFE), Fypro
2.5 parts, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Wherein, Fypro 6-10um, draw ratio is in 10-30.
Embodiment 6
Embodiment 6 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 30 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, LBA3.5 parts, it is 2 parts of water, 0.5 part of polybutadiene, 1 part of polytetrafluoroethylene (PTFE), poly-
2.5 parts of nylon, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Wherein, Fypro 6-10um, draw ratio exist
10-30。
Embodiment 7
Embodiment 7 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of polybutadiene, 1 part of polytetrafluoroethylene (PTFE), glass fibre 1
Part, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Glass fibre 5-10um, draw ratio is in 20-40.
Embodiment 8
Embodiment 8 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 20 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of polybutadiene, 1 part of polytetrafluoroethylene (PTFE), glass fibre 3
Part, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Wherein, glass fibre 5-10um, draw ratio is in 20-40.
Embodiment 9
Embodiment 9 discloses a kind of open-celled polyurethane foam body, the group for preparing raw material of the open-celled polyurethane foam body
At and portion rate it is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxyl third
Base) 0.2 part of trimethyl ammonium formate, 12 parts of pentamethylene, 2 parts of water, 0.5 part of polybutadiene, 1 part of dimethoxysilane, glass fibre 3
Part, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；Wherein, glass fibre 5-10um, draw ratio is in 20-40.
Comparative example 1
Open-celled polyurethane foam body involved in comparative example 1, the composition for preparing raw material of open-celled polyurethane foam body and part
Number ratio is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxypropyl) three
0.2 part of toluic acid ammonium, 12 parts of pentamethylene, 2 parts of water, 3 parts of glass fibre, 0.5 part of polydimethyl siloxane fluid, 145 parts of isocyanates；
Wherein, glass fibre 5-10um, draw ratio is in 20-40.
Comparative example 2
Open-celled polyurethane foam body involved in comparative example 2, the composition for preparing raw material of open-celled polyurethane foam body and part
Number ratio is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxypropyl) three
0.2 part of toluic acid ammonium, 12 parts of pentamethylene, 2 parts of water, 2.5 parts of Fypro, 0.5 part of polydimethyl siloxane fluid, isocyanates
145 parts；Wherein, Fypro 6-10um, draw ratio is in 10-30.
Comparative example 3
Open-celled polyurethane foam body involved in comparative example 3, the composition for preparing raw material of open-celled polyurethane foam body and part
Number ratio is as follows: 100 parts of polyalcohol, 10 parts of dimethylaminoethoxyethanol, 0.3 part of triethylenediamine, (2- hydroxypropyl) three
0.2 part of toluic acid ammonium, 12 parts of pentamethylene, 2 parts of water, 0.5 part of polybutadiene, 1 part of polytetrafluoroethylene (PTFE), polydimethyl siloxane fluid 0.5
Part, 145 parts of isocyanates.
The open-celled polyurethane foam body containing reinforcing fiber that embodiment 1-9 is prepared, and pair with the prior art
The open-celled polyurethane foam body of ratio 1-3 preparation carries out the comparison of mechanical performance；Shown in table specific as follows:
The open-celled polyurethane foam body that above-described embodiment is prepared carries out compressive strength, foam surface state, aperture
The performance test of rate；Through the experimental results showed that, compared with the existing technology, the embodiment of the present invention pass through be added it is improved enhanced
Fiber has the percent opening significantly improved, maintains preferable mechanical performance.
The beneficial effect of the embodiment of the present invention is:
1) present invention is in system by adding reinforcing fiber, and preparing a kind of percent opening is more than 98%, compression performance and ruler
The open-celled polyurethane foam body that very little stability all significantly improves；
2) present invention prepares a kind of vacuum heat-insulating plate using open-cell polyurethane made above as core material, preparation it is true
Empty heat-insulating shield low, good stability of the dimension with thermal coefficient；
3) insulating layer of the vacuum heat-insulating plate disclosed by the embodiments of the present invention as refrigerator, so that refrigerator has heat insulation effect
The advantages that good, depth of foam reduces, plot ratio raising.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope that is bright, being not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention or change
More it should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of open-celled polyurethane foam body, which is characterized in that the open-celled polyurethane foam body is made of following raw material and again
Amount portion rate is prepared:
The reinforcing fiber is the organic fiber or inorfil treated with coupling agent by ionization processing.
2. open-celled polyurethane foam body according to claim 1, which is characterized in that the organic fiber is selected from poly- to benzene two
Formic acid glycol ester fiber, polyacrylonitrile fibre, Fypro, polypropylene fibre, polyethylene fibre, polyimide fiber,
At least one of vinal, carbon fiber；
The diameter of the organic fiber is 1-10um, draw ratio 1-50.
3. open-celled polyurethane foam body according to claim 1, which is characterized in that it is fine that the inorfil is selected from asbestos
At least one of dimension, glass fibre, boron fibre, ceramic fibre；
The inorfil diameter is 1-10um, draw ratio 1-50.
4. open-celled polyurethane foam body according to claim 1, which is characterized in that the pore-creating agent include atoleine,
At least one of polybutadiene, white carbon black, dimethyl polysiloxane, polyoxyalkylene siloxane copolymer, polytetrafluoroethylene (PTFE)；
The catalyst includes expansion type catalyst I, gel-type catalyst II and trimerization type catalyst III；
The expansion type catalyst I is dimethylaminoethoxyethanol；
The gel-type catalyst II is hexamethyl trien, triethylenediamine, triethylamine, N- (3- aminopropyl) miaow
One of azoles, N- (ethoxy) imidazoles, gelation catalyst comprising isocyanate reactive group are a variety of；
The trimerization type catalyst III is (2- hydroxypropyl) trimethyl ammonium formate or pungent quaternary ammonium salt.
5. open-celled polyurethane foam body according to claim 1, which is characterized in that the polyalcohol by polyether glycol I,
Polyether glycol I I, polyether glycol I II and polyether glycol I V composition；
The polyether glycol I is to be prepared as initiator and oxyalkylene by addition reaction using bisphenol-A with polyalcohol；
The polyalcohol is one of ethylene glycol, propylene glycol, diglycol, triethylene-glycol or a variety of；Polyether glycol I
Viscosity be 200-350mPas, hydroxyl value 160-300mgKOH/g, average functionality 2-3；
The polyether glycol I I is passed through using at least one of glycerol, triethylol propane as initiator and oxyalkylene
Addition reaction is prepared, and the viscosity of polyether glycol I I is 400-800mPas, and hydroxyl value is 250-500mg KOH/g, average
Degree of functionality is 2-3；
The polyether glycol I II be using at least one of alkane diamines, toluenediamine and pentaerythrite as initiator with
Oxyalkylene is prepared by addition reaction；The carbon atom number of the alkane diamines is 6-10；The polyether glycol I II
Viscosity be 1000-2000mPas, hydroxyl value 350-500mgKOH/g, average functionality 3-5；
The polyether glycol I V is logical using one of xylitol, sucrose and diethylenetriamine as initiator and oxyalkylene
Addition reaction is crossed to be prepared；The viscosity of the polyether glycol I V is 2000-4000mPas, hydroxyl value 350-600mg
KOH/g, average functionality 4-6.
6. a kind of method for preparing the open-celled polyurethane foam body as described in claim 1-5 any one, which is characterized in that institute
State method the following steps are included:
S1, polyalcohol, catalyst, foam stabilizer and reinforcing fiber are uniformly mixed under 20-25 DEG C, 1-2bar, it is mixed is made first
Close object；
S2, foaming agent is added in the first mixture, surfactant is added, and mixed under 20-25 DEG C, 2-3bar
It is even, the second mixture is made；
S3, after isocyanates is added to the second mixture, third mixture is made；It is in injection pressure by third mixture
It is to be foamed and cured in 40-45 DEG C of mold that pre-temperature is injected under conditions of 135bar, and open-cell polyurethane hard bubble is made
Foam；
S4, the open-cell polyurethane rigid foam cooling and demolding that S3 is prepared take out true at a temperature of being subsequently placed in 120-150 DEG C
Sky further increases percent opening；
S5, the open-cell polyurethane rigid foam that S4 is prepared is cut according to vacuum insulation board size requirement, is opened
Hole polyurethane foam products.
7. a kind of open-celled polyurethane foam body as described in any one in claim 1-5 or preparation method as claimed in claim 6
Obtained open-celled polyurethane foam body is preparing the application in vacuum heat-insulating plate.
8. a kind of vacuum heat-insulating plate as claimed in claim 7, which is characterized in that the vacuum heat-insulating plate includes that the aperture is poly-
The core material of urethane foams preparation, the covering material getter containing metal barrier；
The vacuum heat-insulating plate includes first covering material and the second covering material with different material compositions, and described first
Covering material has different thermal coefficients from the second covering material.
9. a kind of prepare vacuum heat-insulating plate as claimed in claim 7, which is characterized in that the preparation method packet of the vacuum heat-insulating plate
Include following steps:
S1, three sides of the first covering material and the second covering material are hot-melted, leave and take and form opening on one side, is had
The packed double-deck covering material of edge sealing and opening；
S2, core material prepared by open-cell polyurethane is cut into specified size, the bag that S1 is obtained then is added to together with getter
The double-deck covering material is filled, preliminary product is obtained；
S3, the preliminary product for obtaining S2 vacuumize, until pressure is less than 1Pa, then by the packed double-deck covering material
Vacuum heat-insulating plate is prepared by heat fusion sealing in opening.
10. the vacuum insulation that a kind of vacuum heat-insulating plate as claimed in claim 8 or preparation method as claimed in claim 9 obtain
Application of the plate in refrigerator.
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| CN111021082A (en) * | 2019-11-19 | 2020-04-17 | 吴江市汉塔纺织整理有限公司 | Mute breathable down-proof coating and preparation method thereof |
| CN111533867A (en) * | 2020-05-26 | 2020-08-14 | 中电保力（北京）科技有限公司 | Polyurethane gel foam and preparation method thereof |
| CN113930063A (en) * | 2020-07-14 | 2022-01-14 | 中国石油化工股份有限公司 | Composition for preparing shape memory rigid polyurethane foam and shape memory rigid polyurethane foam |
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