CN109851740A - The foamed heat-insulating material and preparation method thereof of medical ultra low temperature freezer - Google Patents
The foamed heat-insulating material and preparation method thereof of medical ultra low temperature freezer Download PDFInfo
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- CN109851740A CN109851740A CN201910058865.6A CN201910058865A CN109851740A CN 109851740 A CN109851740 A CN 109851740A CN 201910058865 A CN201910058865 A CN 201910058865A CN 109851740 A CN109851740 A CN 109851740A
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- insulating material
- foamed heat
- preparation
- low temperature
- ultra low
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Abstract
The present invention relates to heat-barrier material fields, more particularly to foamed heat-insulating material of medical ultra low temperature freezer and preparation method thereof, the foamed heat-insulating material of medical ultra low temperature freezer, the foamed heat-insulating material is made of the raw material of following weight proportion: hard polyurethane foams 75%, add fiber 10%, additive 5%, water 10%.Foamed heat-insulating material indices provided by the invention are all satisfied the requirement in conventional pentamethylene actual use, are not easy scaling-off, cracking, and dimensional stability is preferable, flat appearance, and heat insulation is ideal；The preparation method of foamed heat-insulating material provided by the invention, simple process are easy to operate.
Description
Technical field
The present invention relates to the foamed heat-insulating materials and its preparation side of heat-barrier material field more particularly to medical ultra low temperature freezer
Method.
Background technique
Ultra low temperature freezer, also known as ultralow temperature refrigerator-freezer, ultra-low temp.By being broadly divided into: the guarantor of applicable tuna
It deposits, the low-temperature test of electronic device, special material and preservation blood plasma, biomaterial, vaccine, reagent, biological products, chemistry are tried
The cryo-conservations such as agent, strain, biological sample.Ultra low temperature freezer has the multiple types such as -40 DEG C, -86 DEG C, -125 DEG C.
Heat-barrier material can block the material of hot-fluid transmitting, also known as heat insulator.Heat-barrier material is group important in refrigerator
At part, main function completely cuts off heat, and the heat of outside is not allowed to enter in refrigerator, and the cold air in refrigerator is avoided to scatter and disappear.
Currently, the heat-barrier material used in the market still has much room for improvement, the performance of itself is improved, hot gas is reduced and carries out refrigerator
Amount, reduce the refrigerator number of starts, to achieve the purpose that more to economize on electricity.
Summary of the invention
The purpose of the present invention is to provide foamed heat-insulating materials of medical ultra low temperature freezer and preparation method thereof, on solving
State technical problem.
The present invention using following technical scheme in order to solve the above technical problems, realized:
The foamed heat-insulating material of medical ultra low temperature freezer, the foamed heat-insulating material by following weight proportion raw material system
At:
Preferably, the hard polyurethane foams are made of, polyethers isocyanates (black material) and polyether polyol (white material)
Polyalcohol (white material)/isocyanates (black material)=1:1.2.
Preferably, the addition fiber is made of glass fibre and carbon fiber, glass fibre/carbon fiber=3:2.
Preferably, the additive includes surfactant, catalyst and pentamethylene foaming agent.
The preparation method of the foamed heat-insulating material of medical ultra low temperature freezer, includes the following steps:
S1, performed polymer preparation: isocyanates (black material), polyether polyol (white material) and addition fiber are mixed, stirred
Mix time 6-8S；
S2, water, additive are added into performed polymer, continue to stir 2-3S；
S3, it will foam in the raw material merging reaction mold after stirring；
S4, after 6-8 minutes, die sinking, foamed heat-insulating material molding.
Preferably, in the step S1, first polyether polyol (white material) is put into the reaction kettle with agitating device,
When being stirred to polyether polyol (white material), it is gradually added into isocyanates (black material), addition fiber, is controlled during the reaction
Reaction temperature is no more than 90 DEG C, adds rear temperature and is kept for 90 DEG C or less one hour of reaction.
Preferably, mixing speed is 2500-3000 revs/min in step S1, S2.
Preferably, in the step S3, mold temperature is controlled at 38 ± 2 DEG C.
Preferably, it is coated with release agent on die inside wall in the step S3, allows foamed heat-insulating material more smoothly
Break away from moulds.
The beneficial effects of the present invention are:
Foamed heat-insulating material indices provided by the invention are all satisfied the requirement in conventional pentamethylene actual use, are not easy
Scaling-off, cracking, dimensional stability is preferable, flat appearance, and heat insulation is ideal；
The preparation method of foamed heat-insulating material provided by the invention, simple process are easy to operate.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained, and however, the following embodiments are merely preferred embodiments of the present invention, and not all.
Based on the implementation example in the implementation mode, those skilled in the art's obtained other realities without making creative work
Example is applied, protection scope of the present invention is belonged to.Experimental method in following embodiments is unless otherwise specified conventional method,
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
Embodiment 1
The foamed heat-insulating material of medical ultra low temperature freezer, foamed heat-insulating material are made of the raw material of following weight proportion:
Hard polyurethane foams are made of isocyanates (black material) and polyether polyol (white material), and polyether polyol is (white
Material)/isocyanates (black material)=1:1.2, it adds fiber and is made of glass fibre and carbon fiber, glass fibre/carbon fiber=3:
2, additive includes surfactant, catalyst and pentamethylene foaming agent.
The preparation method of the foamed heat-insulating material of medical ultra low temperature freezer, includes the following steps:
S1, performed polymer preparation: isocyanates (black material), polyether polyol (white material) and addition fiber are mixed, stirred
Mix time 6-8S；
S2, water, additive are added into performed polymer, continue to stir 2-3S；
S3, it will foam in the raw material merging reaction mold after stirring；
S4, after 6-8 minutes, die sinking, foamed heat-insulating material molding.
In step S1, first polyether polyol (white material) is put into the reaction kettle with agitating device, to polyether polyols
When alcohol (white material) is stirred, it is gradually added into isocyanates (black material), addition fiber, controls reaction temperature not during the reaction
More than 90 DEG C, adds rear temperature and kept for 90 DEG C or less one hour of reaction.
Step S1, mixing speed is 2500-3000 revs/min in S2, and in step S3, mold temperature is controlled at 38 ± 2 DEG C, step
Release agent is coated on die inside wall in rapid S3.
It is 100 ± 1mm that this foamed heat-insulating material, which chooses length, and width is that 100 ± 1mm removes with a thickness of 25 ± 0.5mm
Epidermis is thermally shielded the experiment of material, show that experimental data is as follows:
| Project | Numerical value | Project | Numerical value |
| Apparent core density kg/m3 | 34 | Rate of closed hole % | 93 |
| Compressive strength kPa | 151 | Low-Temperature Size stability (- 20 DEG C for 24 hours) % | 0.49 |
| Thermal coefficient W/m.k | 0.02 | High temperature dimensional stability (100 DEG C for 24 hours) % | 0.5 |
| Water absorption rate (V/V) % | 2.7 |
This foamed heat-insulating material indices are all satisfied the requirement in conventional pentamethylene actual use.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, described in the above embodiment and specification is only the present invention
Preference, be not intended to limit the invention, without departing from the spirit and scope of the present invention, the present invention also has various
Changes and improvements, these changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by institute
Attached claims and its equivalent thereof.
Claims (9)
1. the foamed heat-insulating material of medical ultra low temperature freezer, it is characterised in that: the foamed heat-insulating material is by following weight proportion
Raw material be made:
。
2. the foamed heat-insulating material of medical ultra low temperature freezer according to claim 1, it is characterised in that: the hard polyurethane
Ester foam is made of isocyanates (black material) and polyether polyol (white material), polyether polyol (white material)/isocyanates (black material)
=1:1.2.
3. the foamed heat-insulating material of medical ultra low temperature freezer according to claim 1, it is characterised in that: the addition fiber
It is made of glass fibre and carbon fiber, glass fibre/carbon fiber=3:2.
4. the foamed heat-insulating material of medical ultra low temperature freezer according to claim 1, it is characterised in that: the additive packet
Include surfactant, catalyst and pentamethylene foaming agent.
5. the preparation method of the foamed heat-insulating material of medical ultra low temperature freezer according to claim 1, it is characterised in that: packet
Include following steps:
S1, performed polymer preparation: by isocyanates (black material), polyether polyol (white material) and addition fiber mixing, when stirring
Between 6-8S；
S2, water, additive are added into performed polymer, continue to stir 2-3S；
S3, it will foam in the raw material merging reaction mold after stirring；
S4, after 6-8 minutes, die sinking, foamed heat-insulating material molding.
6. preparation method according to claim 5, it is characterised in that: first that polyether polyol is (white in the step S1
Material) it is put into the reaction kettle with agitating device, when being stirred to polyether polyol (white material), it is gradually added into isocyanates
(black material), addition fiber controls reaction temperature during the reaction and is no more than 90 DEG C, adds rear temperature and keeps 90 DEG C or less reactions
One hour.
7. preparation method according to claim 5, it is characterised in that: mixing speed is 2500- in step S1, S2
3000 revs/min.
8. preparation method according to claim 5, it is characterised in that: in the step S3, mold temperature is controlled 38 ± 2
℃。
9. preparation method according to claim 5, it is characterised in that: be coated with demoulding on die inside wall in the step S3
Agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058865.6A CN109851740A (en) | 2019-01-22 | 2019-01-22 | The foamed heat-insulating material and preparation method thereof of medical ultra low temperature freezer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910058865.6A CN109851740A (en) | 2019-01-22 | 2019-01-22 | The foamed heat-insulating material and preparation method thereof of medical ultra low temperature freezer |
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Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804150A (en) * | 2019-11-14 | 2020-02-18 | 江苏雅克科技股份有限公司 | Three-dimensional direction reinforced polyurethane thermal insulation material and preparation method thereof |
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Application publication date: 20190607 |