CN107501906A - A kind of special cystosepiment of packaging for foodstuff - Google Patents
A kind of special cystosepiment of packaging for foodstuff Download PDFInfo
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- CN107501906A CN107501906A CN201710881338.6A CN201710881338A CN107501906A CN 107501906 A CN107501906 A CN 107501906A CN 201710881338 A CN201710881338 A CN 201710881338A CN 107501906 A CN107501906 A CN 107501906A
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- cystosepiment
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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
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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)
- Wrappers (AREA)
Abstract
The invention mainly relates to composites processing technology field, discloses a kind of special cystosepiment of packaging for foodstuff, is made up of following raw material：Polyurethane resin, makrolon, polysulfone resin, asbestos, chitosan quaternary ammonium salt, white carbon, graphene, acetum；It is safe and healthy, green, flexible insulation, suppress varied bacteria growing, ensure that food is not destroyed by external force, extend Food Shelf-life；Polyurethane resin is carried out into heating to dissolve, by increasing capacitance it is possible to increase the resistance to compression of cystosepiment and tensile strength, improve the defencive function to food；Makrolon and polysulfone resin are added, increases the intensity and heat-insulating property of cystosepiment, avoids food from being extruded by external force, reduces the influence of the high temperature or low temperature in the external world to packaged food, extends Food Shelf-life；White carbon and graphene are added, it is safe and non-toxic, the intensity and fire resistance of foam are improved, relatively low foam thermal conductivity, strengthens defencive function of the foam to food, and can reuse, save a large amount of packing costs.
Description
Technical field
The invention mainly relates to composites processing technology field, more particularly to a kind of special cystosepiment of packaging for foodstuff.
Background technology
Cystosepiment, it is a kind of widely used material, is mainly used in construction wall, roof heat insulation, composite plate is incubated, cold
Storehouse, air-conditioning, vehicle, the insulation of ship, floor heating, decoration engraving, packaging etc., purposes is very extensive, in the market
The use of more cystosepiment is mostly polystyrene foam plate, phenolic foam board and polyurethane foam board, but polystyrene foam
Plate and phenolic foam board corrosion resistance are poor, easy to aging, broken, easily produce noxious material, and polyurethane foam board is ageing-resistant,
But heat insulating ability is poor；A kind of composite polyurethane foam sheet material disclosed in the existing A of patent document CN 103831923, have compared with
Good heat-insulated and performance muffler, the isocyanates of addition have certain toxicity, and pliability is smaller, it is impossible to dedicated for food bag
Dress；It is a kind of common manner of packing to carry out packaging for foodstuff with cystosepiment, but food direct relation human body is healthy, therefore, is used for
The cystosepiment of packaged food will also ensure food security while ensureing that food is not destroyed, extend Food Shelf-life.
The content of the invention
The defects of in order to make up prior art, it is an object of the invention to provide a kind of special cystosepiment of packaging for foodstuff.
A kind of special cystosepiment of packaging for foodstuff, is made up of the raw material of following parts by weight：Polyurethane resin 91 ~ 93, poly- carbonic acid
Ester 14 ~ 16, polysulfone resin 11 ~ 13, asbestos 10 ~ 12, chitosan quaternary ammonium salt 7 ~ 9, white carbon 0.3 ~ 0.5, graphene 0.14 ~
0.16th, acetum 3 ~ 5.
Described acetum, volume fraction are 40 ~ 45%.
A kind of preparation method of the special cystosepiment of packaging for foodstuff, comprises the following steps：
（1）Polyurethane resin is heated to 210 ~ 220 DEG C, insulation melting 10 ~ 15 minutes, avoids using traditional polyurethane liquid
Body, by increasing capacitance it is possible to increase the resistance to compression of cystosepiment and tensile strength, improve the defencive function to food, obtain melting polyurethane；
（2）Makrolon and polysulfone resin are added in melting polyurethane, is melted 30 ~ 35 minutes in 190 ~ 200 DEG C of stirrings, makes original
Material is sufficiently mixed, and is increased the intensity and heat-insulating property of cystosepiment, is avoided food from being extruded by external force, reduces the high temperature or low temperature in the external world
Influence to being packaged food, extends Food Shelf-life, obtains mixture A；
（3）White carbon and graphene are added in mixture A, stirred 10 ~ 15 minutes in 200 ~ 210 DEG C, it is safe and non-toxic, it is fully molten
Fully combined with resin after melting mixing, improve the intensity and fire resistance of foam, relatively low foam thermal conductivity, enhancing foam is to food
Defencive function, and can reuse, save a large amount of packing costs, obtain mixture B；
（4）Asbestos and chitosan quaternary ammonium salt are added in mixture B, are stirred under vacuum in 160 ~ 170 DEG C uniformly, it is green safe, carry
The insulation of high foam and anti-microbial property, food and the mouldy corrosion of foam are avoided, extend Food Shelf-life, that improves foam uses valency
Value, -6 ~ -4 DEG C are cooled to, are incubated 5 ~ 7 hours, be crushed to 40 ~ 50nm, add acetum, then add with 1.1 ~ 1.3 DEG C/min
Heat is to 220 ~ 230 DEG C, fully melting, improves the weatherability of foam, increases foamy body and pliability, enhancing foam is to external force
Cushioning effect, food is avoided because external force is destroyed, improve food quality, obtain mixture C；
（5）Mixture C is foamed and is molded by traditional handicraft, obtains the special cystosepiment of packaging for foodstuff.
The step（4）Vacuum, vacuum is -41 ~ -43MPa.
The step（4）Cooling, speed be 1.3 ~ 1.5 DEG C/min.
It is an advantage of the invention that：The special cystosepiment of packaging for foodstuff provided by the invention, it is safe and healthy, it is green, it is flexible
Insulation, suppress varied bacteria growing, can extend Food Shelf-life while ensureing that food is not destroyed by external force；By polyurethane
Resin carries out heating and dissolved, and avoids using traditional polyurethane liquid, by increasing capacitance it is possible to increase the resistance to compression of cystosepiment and tensile strength, improves
To the defencive function of food；Add makrolon and polysulfone resin carries out insulation melting, be sufficiently mixed raw material, increase cystosepiment
Intensity and heat-insulating property, avoid food from being extruded by external force, reduce the external world high temperature or low temperature to be packaged food influence, prolong
Long Food Shelf-life；White carbon and graphene are added, it is safe and non-toxic, fully combined with resin after abundant melting mixing, improve bubble
The intensity and fire resistance of foam, relatively low foam thermal conductivity, strengthen defencive function of the foam to food, and can reuse,
Save a large amount of packing costs；Continuously add asbestos and chitosan quaternary ammonium salt carries out melting mixing, it is green safe, improve the guarantor of foam
Mild antibiotic performance, food and the mouldy corrosion of foam are avoided, extend Food Shelf-life, improve the use value of foam, Suo Youyuan
Snap frozen is carried out after material mixing, is rapidly heated after adding acetum, improves the weatherability of foam, increases foamy body
And pliability, enhancing foam avoid food because external force is destroyed, improve food quality to the cushioning effect of external force.
Embodiment
Illustrate the present invention with specific embodiment below.
Embodiment 1
A kind of special cystosepiment of packaging for foodstuff, is made up of the raw material of following parts by weight：Polyurethane resin 91, makrolon 14, gather
Sulphone resin 11, asbestos 10, chitosan quaternary ammonium salt 7, white carbon 0.3, graphene 0.14, acetum 3.
Described acetum, volume fraction 40%.
A kind of preparation method of the special cystosepiment of packaging for foodstuff, comprises the following steps：
（1）Polyurethane resin is heated to 210 DEG C, insulation melting 10 minutes, avoids using traditional polyurethane liquid, Neng Gouzeng
Add resistance to compression and the tensile strength of cystosepiment, improve the defencive function to food, obtain melting polyurethane；
（2）Makrolon and polysulfone resin are added in melting polyurethane, is melted 30 minutes in 190 DEG C of stirrings, makes raw material abundant
Mixing, increases the intensity and heat-insulating property of cystosepiment, avoids food from being extruded by external force, reduces extraneous high temperature or low temperature to being wrapped
The influence of food is filled, extends Food Shelf-life, obtains mixture A；
（3）White carbon and graphene are added in mixture A, stirred 10 minutes in 200 DEG C, safe and non-toxic, abundant melting mixing
Fully combined with resin afterwards, improve the intensity and fire resistance of foam, relatively low foam thermal conductivity, protection of the enhancing foam to food
Function, and can reuse, a large amount of packing costs are saved, obtain mixture B；
（4）Asbestos and chitosan quaternary ammonium salt are added in mixture B, are stirred under vacuum uniformly in 160 DEG C, vacuum is -41MPa,
It is green safe, insulation and the anti-microbial property of foam are improved, avoids food and the mouldy corrosion of foam, extends Food Shelf-life, is improved
The use value of foam, -6 DEG C are cooled to, speed is 1.3 DEG C/min, is incubated 5 hours, is crushed to 40 ~ 50nm, and it is molten to add acetic acid
Liquid, then 220 DEG C are heated to 1.1 DEG C/min, fully melting, the weatherability of foam is improved, increases foamy body and pliability,
Strengthen foam to the cushioning effect of external force, avoid food because external force is destroyed, improve food quality, obtain mixture C；
（5）Mixture C is foamed and is molded by traditional handicraft, obtains the special cystosepiment of packaging for foodstuff.
Embodiment 2
A kind of special cystosepiment of packaging for foodstuff, is made up of the raw material of following parts by weight：Polyurethane resin 92, makrolon 15, gather
Sulphone resin 12, asbestos 11, chitosan quaternary ammonium salt 8, white carbon 0.4, graphene 0.15, acetum 4.
Described acetum, volume fraction 43%.
Preparation method is the same as embodiment 1.
Embodiment 3
A kind of special cystosepiment of packaging for foodstuff, is made up of the raw material of following parts by weight：Polyurethane resin 93, makrolon 16, gather
Sulphone resin 13, asbestos 12, chitosan quaternary ammonium salt 9, white carbon 0.5, graphene 0.16, acetum 5.
Described acetum, volume fraction 45%.
Preparation method is the same as embodiment 1.
Comparative example 1
Remove makrolon, remaining preparation method, with embodiment 1.
Comparative example 2
Remove polysulfone resin, remaining preparation method, with embodiment 1.
Comparative example 3
Remove asbestos, remaining preparation method, with embodiment 1.
Comparative example 4
Remove chitosan quaternary ammonium salt, remaining preparation method, with embodiment 1.
Comparative example 5
Remove white carbon, remaining preparation method, with embodiment 1.
Comparative example 6
Remove graphene, remaining preparation method, with embodiment 1.
Comparative example 7
Remove acetum, remaining preparation method, with embodiment 1.
Comparative example 8
Removal step（2）、（3）With（4）, all raw materials are disposably mixed, remaining preparation method, with embodiment 1.
Comparative example 9
Removal step（4）In freezing, all raw materials are mixed together, remaining preparation method, with embodiment 1.
Comparative example 10
Step（4）In with 2 DEG C/min heating, all raw materials are mixed together, remaining preparation method, with embodiment 1.
Comparative example 11
A kind of composite polyurethane foam sheet material disclosed in the existing A of patent document CN 103831923.
The performance detection of embodiment and comparative example foam plate：
（1）, new cystosepiment performance
According to the method described in GB/T 10801.2-2002, the performance of new cystosepiment in embodiment and comparative example is examined
Survey, the performance detection of embodiment and comparative example foam plate is shown in Table 1.
Table 1：The performance detection of embodiment and comparative example foam plate
| Project | Compression strength/（MPa） | Tensile strength/（MPa） | Oxygen index (OI)/（%） | Thermal conductivity factor/（W/m·K） |
| Embodiment 1 | 0.32 | 0.41 | 35.2 | 0.019 |
| Embodiment 2 | 0.34 | 0.43 | 35.7 | 0.021 |
| Embodiment 3 | 0.33 | 0.42 | 35.3 | 0.020 |
| Comparative example 1 | 0.22 | 0.28 | 30.2 | 0.031 |
| Comparative example 2 | 0.24 | 0.30 | 30.4 | 0.028 |
| Comparative example 3 | 0.28 | 0.33 | 31.5 | 0.028 |
| Comparative example 4 | 0.27 | 0.31 | 31.1 | 0.025 |
| Comparative example 5 | 0.30 | 0.39 | 33.5 | 0.022 |
| Comparative example 6 | 0.26 | 0.33 | 32.7 | 0.024 |
| Comparative example 7 | 0.25 | 0.31 | 32.8 | 0.022 |
| Comparative example 8 | 0.31 | 0.31 | 33.1 | 0.021 |
| Comparative example 9 | 0.28 | 0.37 | 31.4 | 0.023 |
| Comparative example 10 | 0.30 | 0.34 | 32.8 | 0.022 |
| Comparative example 11 | 0.27 | 0.30 | 29.7 | 0.024 |
Show from the result of table 1, the special cystosepiment of packaging for foodstuff of embodiment, compression strength and tensile strength are substantially compared with comparative example
Height, show that the durability of cystosepiment is strong, oxygen index (OI) is high compared with comparative example, and thermal conductivity factor is small compared with comparative example, has preferable fire resistance
Can, illustrate that the special cystosepiment of packaging for foodstuff provided by the invention has good performance.
（2）, aging cystosepiment performance
Example and 3 pieces of the new cystosepiment of comparative example respectively, size is 10cm × 10cm, each group cystosepiment is placed in outdoor quiet
Aging is put 2 years, according to the method described in GB/T 10801.2-2002, to the property of aging cystosepiment in embodiment and comparative example
It can be detected, the performance detection of embodiment and comparative example foam plate is shown in Table 2.
Table 2：The performance detection of embodiment and comparative example foam plate
| Project | Compression strength/（MPa） | Tensile strength/（MPa） | Oxygen index (OI)/（%） | Thermal conductivity factor/（W/m·K） |
| Embodiment 1 | 0.31 | 0.41 | 34.6 | 0.021 |
| Embodiment 2 | 0.33 | 0.42 | 34.9 | 0.022 |
| Embodiment 3 | 0.33 | 0.41 | 34.7 | 0.022 |
| Comparative example 1 | 0.21 | 0.26 | 29.4 | 0.032 |
| Comparative example 2 | 0.22 | 0.27 | 29.6 | 0.029 |
| Comparative example 3 | 0.26 | 0.30 | 30.8 | 0.030 |
| Comparative example 4 | 0.26 | 0.28 | 30.7 | 0.026 |
| Comparative example 5 | 0.28 | 0.35 | 32.5 | 0.026 |
| Comparative example 6 | 0.23 | 0.31 | 31.6 | 0.025 |
| Comparative example 7 | 0.24 | 0.28 | 31.9 | 0.024 |
| Comparative example 8 | 0.29 | 0.29 | 32.4 | 0.025 |
| Comparative example 9 | 0.25 | 0.34 | 32.6 | 0.026 |
| Comparative example 10 | 0.29 | 0.31 | 31.7 | 0.024 |
| Comparative example 11 | 0.23 | 0.25 | 27.3 | 0.028 |
Show from the result of table 2, the special cystosepiment of packaging for foodstuff of embodiment is after outdoor ageing 2 years, compression strength and tension
Intensity is substantially high compared with comparative example, shows that the durability of cystosepiment is strong, and oxygen index (OI) is high compared with comparative example, and thermal conductivity factor is small compared with comparative example,
With preferable fire resistance, each newer cystosepiment index rate of change of index is smaller, and ageing-resistant performance is substantially strong compared with comparative example, says
The bright special cystosepiment of packaging for foodstuff provided by the invention has good ageing-resistant performance.
（3）, cystosepiment packaging character
The cystosepiment of each group is taken respectively, and each cystosepiment has grid, and each grid puts a ripe intact banana, then uses cystosepiment
Lid closing, every group of cystosepiment put 10 bananas, the cystosepiment for respectively assembling banana are placed in into 25 DEG C, records starting to decay for banana
Time and completely rotten time, and mould is inoculated with to each group cystosepiment, detected again after 24 hours, calculate the suppression of cystosepiment
The packaging character of bacterium rate, embodiment and comparative example foam plate is shown in Table 3.
Table 3：The packaging character of embodiment and comparative example foam plate
| Project | Start to decay the time/（d） | Rot the time completely/（d） | Bacteriostasis rate/（%） |
| Embodiment 1 | 5 | 9 | 85.7 |
| Embodiment 2 | 6 | 8 | 85.9 |
| Embodiment 3 | 6 | 9 | 85.2 |
| Comparative example 1 | 4 | 7 | 85.6 |
| Comparative example 2 | 5 | 7 | 83.8 |
| Comparative example 3 | 5 | 8 | 84.6 |
| Comparative example 4 | 4 | 6 | 58.6 |
| Comparative example 5 | 5 | 6 | 57.3 |
| Comparative example 6 | 4 | 5 | 64.5 |
| Comparative example 7 | 5 | 8 | 63.6 |
| Comparative example 8 | 6 | 7 | 85.3 |
| Comparative example 9 | 4 | 7 | 83.4 |
| Comparative example 10 | 5 | 8 | 85.6 |
| Comparative example 11 | 3 | 5 | 42.5 |
Show from the result of table 3, the special cystosepiment of packaging for foodstuff of embodiment, start to decay the time and completely rot the time compared with
In comparative example evening, substantially more ratio is high for bacteriostasis rate, illustrates that the special cystosepiment of packaging for foodstuff provided by the invention has bag well
Performance is filled, Food Shelf-life can be obviously prolonged.
Claims (5)
1. a kind of special cystosepiment of packaging for foodstuff, it is characterised in that be made up of the raw material of following parts by weight：Polyurethane resin 91 ~
93rd, makrolon 14 ~ 16, polysulfone resin 11 ~ 13, asbestos 10 ~ 12, chitosan quaternary ammonium salt 7 ~ 9, white carbon 0.3 ~ 0.5, graphene
0.14 ~ 0.16, acetum 3 ~ 5.
2. the special cystosepiment of packaging for foodstuff according to claim 1, it is characterised in that described acetum, volume fraction
For 40 ~ 45%.
3. a kind of preparation method of the special cystosepiment of packaging for foodstuff according to claim 1, it is characterised in that including following step
Suddenly：
（1）Polyurethane resin is heated to 210 ~ 220 DEG C, insulation melting 10 ~ 15 minutes, obtains melting polyurethane；
（2）Makrolon and polysulfone resin are added in melting polyurethane, melts 30 ~ 35 minutes, obtains mixed in 190 ~ 200 DEG C of stirrings
Compound A；
（3）White carbon and graphene are added in mixture A, is stirred 10 ~ 15 minutes in 200 ~ 210 DEG C, obtains mixture B；
（4）Asbestos and chitosan quaternary ammonium salt are added in mixture B, is stirred under vacuum uniformly in 160 ~ 170 DEG C, is cooled to -6 ~ -4
DEG C, 5 ~ 7 hours are incubated, is crushed to 40 ~ 50nm, adds acetum, then 220 ~ 230 DEG C are heated to 1.1 ~ 1.3 DEG C/min,
Fully melting, obtains mixture C；
（5）Mixture C is foamed and is molded by traditional handicraft, obtains the special cystosepiment of packaging for foodstuff.
4. the preparation method of the special cystosepiment of packaging for foodstuff according to claim 3, it is characterised in that the step（4）'s
Vacuum, vacuum are -41 ~ -43MPa.
5. the preparation method of the special cystosepiment of packaging for foodstuff according to claim 3, it is characterised in that the step（4）'s
Cooling, speed are 1.3 ~ 1.5 DEG C/min.
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| CN201710881338.6A CN107501906A (en) | 2017-09-26 | 2017-09-26 | A kind of special cystosepiment of packaging for foodstuff |
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| CN107501906A true CN107501906A (en) | 2017-12-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238633A (en) * | 2020-09-25 | 2021-01-19 | 阜阳市三郁包装材料有限公司 | Special foam board for packaging and preparation method thereof |
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2017
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| CN101781396A (en) * | 2010-03-30 | 2010-07-21 | 上海交通大学 | Chitosan-polyurethane composite rigid closed-cell foam material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238633A (en) * | 2020-09-25 | 2021-01-19 | 阜阳市三郁包装材料有限公司 | Special foam board for packaging and preparation method thereof |
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Application publication date: 20171222 |