CN104774417B - A kind of refrigerator sealing strip material and preparation method thereof - Google Patents
A kind of refrigerator sealing strip material and preparation method thereof Download PDFInfo
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- CN104774417B CN104774417B CN201510121014.3A CN201510121014A CN104774417B CN 104774417 B CN104774417 B CN 104774417B CN 201510121014 A CN201510121014 A CN 201510121014A CN 104774417 B CN104774417 B CN 104774417B
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Abstract
A kind of refrigerator sealing strip material and preparation method thereof.The present invention relates to a kind of refrigerator sealing strip materials, it is characterised in that includes following components by weight：Polystyrene-Polyethylene -15~40 parts of polybutene-polystyrene copolymer, TPU5~30 part, 10~40 parts of the mixture of PP and PE materials, 5~15 parts of ethene-vinyl acetate copolymer, 8~28 parts of inorganic mineral, 5~20 parts of naphthenic oil HYN-1,1~8 part of antioxidant, 2~12 parts of compatilizer.The invention further relates to the preparation methods of above-mentioned refrigerator sealing strip material.The present invention is based on Polystyrene-Polyethylene-polybutene-polystyrene copolymer and TPU, and it is doped with the mixing material of PP and PE wherein, the groups such as carbamate and carbimide in TPU strands can be punctured into Polystyrene-Polyethylene-polybutene-polystyrene copolymer, achieve the effect that be mutually bonded, to substantially increase the oil resistivity and solvent resistance of material, and make material that there is preferable resilience.
Description
Technical field
The present invention relates to thermoplastic elastic material technical fields, refer specifically to a kind of thermoplastic elastomehc for refrigerator sealing strip
Elastomer material, the invention further relates to the preparation methods of above-mentioned refrigerator sealing strip material.
Background technology
The sealing strip of refrigerator determines that the refrigeration and heat insulation of refrigerator, general refrigerator sealing strip must have elastic ability
Sealing function is played, therefore the design of various refrigerator sealing strips all develops around elastic rubber material.First generation refrigerator is close
Strip of paper used for sealing product is thermoset elastomeric material, many advantages, such as having oil resistivity, high temperature resistant and be unlikely to deform, still, there is processing
Complex process, high energy consumption, it is not recyclable, not environmentally the shortcomings of, then, first generation rubber material refrigerator sealing strip is soon by
Two generation PVC (polyvinyl chloride) materials are replaced, and cheap, durable, chemical property is stable, processing technology is simple due to having for PVC material
The advantages such as single and be used as refrigerator sealing strip.
However, the requirement with consumer to quality of the life is higher and higher, the poor feature of environmental protection, the processing technology of PVC sealing strips
Harmfulness, PVC in use poor lower temperature resistance the defects of constantly amplified, PVC sealing strips gradually cannot be satisfied
The high request of people.Therefore, thermoplastic elastomer (TPE) TPE (Thermoplastic Elastomer) comes into being, this novel
Thermoplastic elastomer (TPE) becomes a developing direction of third generation refrigerator sealing strip material.For PVC sealing strip materials,
TPE is harmless to environment and human body, and does not add any harmful substance in preparation process, and waste material leftover pieces can also recycle profit
With processing technology is simple, takes short and not will produce toxic and harmful gas in preparation process.It is poly- with Polystyrene-Polyethylene-
Butylene-polystyrene copolymer is the thermoplastic elastomer (TPE) of base material, except relatively small with good caoutchouc elasticity, permanent deformation
Outside, also there is preferable weatherability, lower temperature resistance, tinctorial property, still, Polystyrene-Polyethylene-polybutene-polystyrene
The solvent resistance of copolymer, oil resistivity are all not as good as PVC and conventional vulcanized rubbers, and Polystyrene-Polyethylene-polybutene-polyphenyl
The rigidity of ethylene copolymer itself is excessive, therefore, in the prior art by Polystyrene-Polyethylene-polybutene-polystyrene copolymerization
Object is restricted applied to refrigerator sealing strip material by above-mentioned factors, it is difficult to obtain the preferable refrigerator sealing of overall performance
Material.
Therefore, it for current refrigerator sealing strip material, is improved up for further.
Invention content
A kind of refrigerator sealing strip material is provided the technical problem to be solved by the present invention is to present situation in view of the above technology,
The material has good mechanical property, resilience performance, weather resistance, solvent resistance and oil resistance, and environmentally friendly
It is harmless.
Another technical problem to be solved by this invention is present situation in view of the above technology and provides a kind of above-mentioned refrigerator
The preparation method of sealing strip material.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of refrigerator sealing strip material, feature exist
In by weight including following components：
The compatilizer includes following components by weight：
As a further improvement on the present invention, the Polystyrene-Polyethylene-polybutene-polystyrene copolymer is equal
By the polystyrene-poly of Polystyrene-Polyethylene-polybutene-polystyrene copolymer and low molecular weight of high equimolecular quantity
Ethylene-polybutene-polystyrene copolymer mixes, and Polystyrene-Polyethylene-polybutene-of the high equimolecular quantity is poly-
The weight average molecular weight of styrol copolymer is 16~250,000, and Polystyrene-Polyethylene-polybutene-of the low molecular weight is poly-
The weight average molecular weight of styrol copolymer is 0.5~20,000.
Further, Polystyrene-Polyethylene-polybutene-polystyrene copolymer of the high equimolecular quantity with it is low
The weight ratio of Polystyrene-Polyethylene-polybutene-polystyrene copolymer of equimolecular quantity is 1: 1~2.5.In compatilizer,
Linear low density polyethylene can form mutually interspersed network knot with Polystyrene-Polyethylene-polybutene-polystyrene copolymer
Structure, in refrigerator sealing strip material, carbamate and carbimide group in TPU strands can be punctured into polystyrene-
Constitute network structure in polyethylene-polybutene-polystyrene copolymer, using the above proportioning, can strengthen to the greatest extent on
Network structure is stated, the mechanical property of whole system is effectively improved.
The inorganic mineral is titanium dioxide, talcum powder, nano silicon dioxide, silica, carbon black, white carbon, neutrality
One or two kinds of mixture in aluminium oxide, nano-titanium dioxide, preferably neutral alumina and nano-titanium dioxide
The weight ratio of mixture, the neutral alumina and nano-titanium dioxide is 1: 2~2.5.Inorganic mineral is added with the proportioning can
With the paradigmatic structure of strengthening material, improve the bending modulus of product, robustness, tensile strength, ductility, shear strength,
Shock resistance, compression strength etc..
The antioxidant is one kind in phenolic antioxidant, phosphite ester kind antioxidant, Hinered phenols antioxidant, such as 2,
2 '-di-2-ethylhexylphosphine oxides (4- methyl-6-tert-butylphenols), 2,2 '-di-2-ethylhexylphosphine oxides (4- methyl-6-tert-butylphenols zinc salt), phosphorous
Sour three (2,4- di-tert-butyl-phenyl) esters, β-(4- hydroxy phenyls -3,5- di-t-butyl) propionic acid n-octadecyl alcohol ester, preferably 2,
2 '-di-2-ethylhexylphosphine oxides (4- methyl-6-tert-butylphenols zinc salt), i.e. antioxidant 2246-A.The addition of the antioxidant can capture poly-
Because being heated or being shone by ultraviolet light during styrene-polyethylene-polybutene-polystyrene copolymer and TPU processing or use
The free radical penetrated and formed prevents or slows down the oxidation of organic material to make chain lock terminate reaction, and extend material uses the longevity
Life.
Further, the weight ratio of PP and PE is 0.7~2.3: 1 in the mixture of the PP and PE materials.Using in this way
Proportioning, PP, PE and Polystyrene-Polyethylene-polybutene-polystyrene copolymer form mutually interspersed network structure, one
Aspect reduces the melt viscosity of Polystyrene-Polyethylene-polybutene-polystyrene copolymer, keeps material easy to process, another
Aspect reduces polybutene block limited proportionality, polyphenyl second on the basis of not influencing polybutene block, polystyrene block Tg
The mechanical loss of alkene block limited proportionality, effectively increases the mechanical property of material.
A kind of preparation method of above-mentioned refrigerator sealing strip material, it is characterised in that include the following steps：
(1) preparation of compatilizer
60~90g linear low density polyethylene is taken to carry out Electron beam pre-irradiation, irradiation dose is 10~50kGy, when irradiation
Between be 5~8min；
1~10g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and
5~10min is stirred with the speed of 1000~3000r/min in mixing machine, obtains mixture A；
2~15g glycidyl methacrylate, 5~15g Polystyrene-Polyethylenes-poly- fourth are added into mixture A
Alkene-polystyrene copolymer and 1~5g polyethylene glycol, and in mixing machine with the speed of 1000~3000r/min stirring 10~
20min obtains mixture B；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to described compatible
Agent；
(2) preparation of premix
15~40g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with 5~20g naphthenic oils HYN-1
It closes, so that Polystyrene-Polyethylene-polybutene-polystyrene copolymer is fully absorbed naphthenic oil HYN-1, this is absorbed into ring
It is 1000~3000r/min's that rotating speed, which is added, in Polystyrene-Polyethylene-polybutene of alkane oil HYN-1-polystyrene copolymer
5~8min is stirred in mixing machine；
Mixture, the 5~15g ethane-acetic acid ethyenyls of 10~40g PP and PE materials are sequentially added into above-mentioned mixing machine
Compatilizer prepared by copolymer, 5~30g TPU and 2~12g step (1), continues 7~10min of stirring；Then to above-mentioned mixed
1~8g antioxidant and 8~28g inorganic minerals are sequentially added in conjunction machine, continue 5~8min of stirring；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the master of screw rod should be set in the process
Machine rotating speed is 180~320r/min.
Compared with the prior art, the advantages of the present invention are as follows：
(1) of the invention based on Polystyrene-Polyethylene-polybutene-polystyrene copolymer and TPU, and wherein
It is doped with the mixing material of PP and PE, containing polarized and the groups such as active carbamate and carbimide in TPU strands,
These groups can be punctured into Polystyrene-Polyethylene-polybutene-polystyrene copolymer, the poly- fourth of Polystyrene-Polyethylene-
Soft segment in alkene-polystyrene copolymer provides thermodynamics elastomer for refrigerator sealing strip material, and hard section then enhance it is soft
The surface of the mechanical elasticity of section, elastomer and TPU generate chemical reaction, achieve the effect that be mutually bonded, to substantially increase
The oil resistivity and solvent resistance of material, and make material that there is preferable resilience；
(2) PP, PE and Polystyrene-Polyethylene-polybutene-polystyrene copolymer form mutually interspersed network knot
On the one hand structure reduces the melt viscosity of Polystyrene-Polyethylene-polybutene-polystyrene copolymer, make material convenient for adding
Work, on the other hand, on the basis of not influencing polybutene block, polystyrene block Tg, reduce polybutene block limited proportionality,
The mechanical loss of polystyrene block limited proportionality effectively increases the mechanical property of material；
(3) use of ethene-vinyl acetate copolymer is Polystyrene-Polyethylene-polybutene-polystyrene copolymer
It is grafted undersaturated graft copolymer and provides condition, substantially increase the grafting rate of reaction, further improve the resistance to of material
Oiliness, solvent resistance and weatherability；
(4) compatilizer itself used in the present invention has higher grafting rate, can effectively reduce interfacial tension, make each object
There is preferable homogeneity after matter mixing, and do not have any poison compared with maleic acid anhydride compatilizer commonly used in the prior art
Property, it is environmentally friendly harmless；
(5) preparation method step of the invention is simple, is suitble to environmental requirement.
Specific implementation mode
Present invention is further described in detail with reference to embodiments.
Embodiment 1：
The refrigerator sealing strip material of the present embodiment includes following components by weight：
Wherein, the weight ratio of PP and PE is 0.7: 1 in the mixture of PP and PE materials.
The preparation method of above-mentioned refrigerator sealing strip material includes the following steps：
(1) preparation of compatilizer
Electron beam pre-irradiation, irradiation dose 10kGy, irradiation time 8min are carried out to 60g linear low density polyethylene；
2g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and mixed
10min is stirred with the speed of 1000r/min in conjunction machine, obtains mixture A；
2g glycidyl methacrylate, 8g Polystyrene-Polyethylene-polybutene-polyphenyl second are added into mixture A
Alkene copolymer and 5g polyethylene glycol, and 20min is stirred with the speed of 1000r/min in mixing machine, obtain mixture B；The step
The polystyrene-poly for being 160,000 comprising weight average molecular weight in Polystyrene-Polyethylene-polybutene-polystyrene copolymer in rapid
Ethylene-polybutene-polystyrene copolymer 4g, Polystyrene-Polyethylene-polybutene-polystyrene that weight average molecular weight is 10,000
Copolymer 4g；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to compatilizer；The step
The blending extrusion temperature of twin screw compounder is set as in rapid：One 170 DEG C of area, two 180 DEG C of areas, three 190 DEG C of areas, four 200 DEG C of areas,
Five 210 DEG C of areas；The head extrusion temperature of twin screw compounder is set as 160 DEG C；Screw speed is set as 220r/min；
(2) preparation of premix
15g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with naphthenic oil HYN-1, makes polyphenyl
Ethylene-propylene-polybutene-polystyrene copolymer fully absorbs naphthenic oil HYN-1, this is absorbed naphthenic oil HYN-
1 Polystyrene-Polyethylene-polybutene-polystyrene copolymer is added in the mixing machine that rotating speed is 1000r/min and stirs
8min；In the step in Polystyrene-Polyethylene-polybutene-polystyrene copolymer comprising weight average molecular weight be 160,000 it is poly-
Styrene-polyethylene-polybutene-polystyrene copolymer 3g, the poly- fourth of Polystyrene-Polyethylene-that weight average molecular weight is 10,000
Alkene-polystyrene copolymer 12g；
Sequentially added into above-mentioned mixing machine the mixtures of PP and PE materials, ethene-vinyl acetate copolymer, TPU and
Compatilizer prepared by 2g steps (1) continues to stir 10min；Then 2,2 '-di-2-ethylhexylphosphine oxides are sequentially added into above-mentioned mixing machine
(4- methyl-6-tert-butylphenols) and titanium dioxide continue to stir 8min；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the master of screw rod should be set in the process
Machine rotating speed is 180r/min.
Embodiment 2：
The refrigerator sealing strip material of the present embodiment includes following components by weight：
Wherein, the weight ratio of PP and PE is 0.9: 1 in the mixture of PP and PE materials.
The preparation method of above-mentioned refrigerator sealing strip material includes the following steps：
(1) preparation of compatilizer
Electron beam pre-irradiation, irradiation dose 20kGy, irradiation time 7min are carried out to 70g linear low density polyethylene；
6g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and mixed
7min is stirred with the speed of 2000r/min in conjunction machine, obtains mixture A；
5g glycidyl methacrylate, 15g Polystyrene-Polyethylenes-polybutene-polyphenyl are added into mixture A
Ethylene copolymer and 2g polyethylene glycol, and 18min is stirred with the speed of 2000r/min in mixing machine, obtain mixture B；It should
The polystyrene-for being 180,000 comprising weight average molecular weight in Polystyrene-Polyethylene-polybutene-polystyrene copolymer in step
Polyethylene-polybutene-polystyrene copolymer 3g, Polystyrene-Polyethylene-polybutene-polyphenyl second that weight average molecular weight is 20,000
Alkene copolymer 12g；
Will mixture B is placed in twin screw compounder, carry out extruding graft, drying, granulation to get to compatilizer；It should
The blending extrusion temperature of twin screw compounder is set as in step：One 172 DEG C of area, two 182 DEG C of areas, three 192 DEG C of areas, four areas 202
DEG C, five 212 DEG C of areas；The head extrusion temperature of twin screw compounder is set as 180 DEG C；Screw speed is set as 180r/min；
(2) preparation of premix
30g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with naphthenic oil HYN-1, makes polyphenyl
Ethylene-propylene-polybutene-polystyrene copolymer fully absorbs naphthenic oil HYN-1, this is absorbed naphthenic oil HYN-
1 Polystyrene-Polyethylene-polybutene-polystyrene copolymer is added in the mixing machine that rotating speed is 3000r/min and stirs
5min；In the step in Polystyrene-Polyethylene-polybutene-polystyrene copolymer comprising weight average molecular weight be 180,000 it is poly-
Styrene-polyethylene-polybutene-polystyrene copolymer 15g, the poly- fourth of Polystyrene-Polyethylene-that weight average molecular weight is 20,000
Alkene-polystyrene copolymer 15g；
Sequentially added into above-mentioned mixing machine the mixtures of PP and PE materials, ethene-vinyl acetate copolymer, TPU and
Compatilizer prepared by 8g steps (1) continues to stir 7min；Then 2,2 '-di-2-ethylhexylphosphine oxide (4- are sequentially added into above-mentioned mixing machine
Methyl-6-tert-butylphenol zinc salt) and nano silicon dioxide, continue to stir 5min；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the master of screw rod should be set in the process
Machine rotating speed is 300r/min.
Embodiment 3：
The refrigerator sealing strip material of the present embodiment includes following components by weight：
Wherein, the weight ratio of neutral alumina and nano-titanium dioxide is 1: 2；PP and PE in the mixture of PP and PE materials
Weight ratio be 2.3: 1.
The preparation method of above-mentioned refrigerator sealing strip material includes the following steps：
(1) preparation of compatilizer
Electron beam pre-irradiation, irradiation dose 30kGy, irradiation time 6min are carried out to 80g linear low density polyethylene；
1g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and mixed
5min is stirred with the speed of 3000r/min in conjunction machine, obtains mixture A；
8g glycidyl methacrylate, 10g Polystyrene-Polyethylenes-polybutene-polyphenyl are added into mixture A
Ethylene copolymer and 4g polyethylene glycol, and 15min is stirred with the speed of 3000r/min in mixing machine, obtain mixture B；It should
The polystyrene-for being 220,000 comprising weight average molecular weight in Polystyrene-Polyethylene-polybutene-polystyrene copolymer in step
Polyethylene-polybutene-polystyrene copolymer 4g, Polystyrene-Polyethylene-polybutene-polyphenyl that weight average molecular weight is 0.5 ten thousand
Ethylene copolymer 6g；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to compatilizer；The step
The blending extrusion temperature of twin screw compounder is set as in rapid：One 174 DEG C of area, two 184 DEG C of areas, three 194 DEG C of areas, four 204 DEG C of areas,
Five 214 DEG C of areas；The head extrusion temperature of twin screw compounder is set as 170 DEG C；Screw speed is set as 190r/min；
(2) preparation of premix
40g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with naphthenic oil HYN-1, makes polyphenyl
Ethylene-propylene-polybutene-polystyrene copolymer fully absorbs naphthenic oil HYN-1, this is absorbed naphthenic oil HYN-
1 Polystyrene-Polyethylene-polybutene-polystyrene copolymer is added in the mixing machine that rotating speed is 2000r/min and stirs
7min；In the step in Polystyrene-Polyethylene-polybutene-polystyrene copolymer comprising weight average molecular weight be 220,000 it is poly-
Styrene-polyethylene-polybutene-polystyrene copolymer 8g, the poly- fourth of Polystyrene-Polyethylene-that weight average molecular weight is 0.5 ten thousand
Alkene-polystyrene copolymer 32g；
Sequentially added into above-mentioned mixing machine the mixtures of PP and PE materials, ethene-vinyl acetate copolymer, TPU and
Compatilizer prepared by 10g steps (1) continues to stir 8min；Then phosphorous acid three (2,4- bis- is sequentially added into above-mentioned mixing machine
Tert-butyl-phenyl) ester, neutral alumina and nano-titanium dioxide mixture, continue stir 6min；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the master of screw rod should be set in the process
Machine rotating speed is 250r/min.
Embodiment 4：
The refrigerator sealing strip material of the present embodiment includes following components by weight：
Wherein, the weight ratio of neutral alumina and nano-titanium dioxide is 1: 2.5；In the mixture of PP and PE materials PP with
The weight ratio of PE is 2.1: 1.
The preparation method of above-mentioned refrigerator sealing strip material includes the following steps：
(1) preparation of compatilizer
Electron beam pre-irradiation, irradiation dose 40kGy, irradiation time 8min are carried out to 90g linear low density polyethylene；
8g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and mixed
8min is stirred with the speed of 1500r/min in conjunction machine, obtains mixture A；
15g glycidyl methacrylate, 5g Polystyrene-Polyethylenes-polybutene-polyphenyl are added into mixture A
Ethylene copolymer and 1g polyethylene glycol, and 12min is stirred with the speed of 2500r/min in mixing machine, obtain mixture B；It should
The polystyrene-for being 250,000 comprising weight average molecular weight in Polystyrene-Polyethylene-polybutene-polystyrene copolymer in step
Polyethylene-polybutene-polystyrene copolymer 2.5g, Polystyrene-Polyethylene-polybutene-that weight average molecular weight is 0.8 ten thousand are poly-
Styrol copolymer 2.5g；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to compatilizer；The step
The blending extrusion temperature of twin screw compounder is set as in rapid：One 177 DEG C of area, two 187 DEG C of areas, three 197 DEG C of areas, four 207 DEG C of areas,
Five 217 DEG C of areas；The head extrusion temperature of twin screw compounder is set as 190 DEG C；Screw speed is set as 210r/min；
(2) preparation of premix
35g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with naphthenic oil HYN-1, makes polyphenyl
Ethylene-propylene-polybutene-polystyrene copolymer fully absorbs naphthenic oil HYN-1, this is absorbed naphthenic oil HYN-
1 Polystyrene-Polyethylene-polybutene-polystyrene copolymer is added in the mixing machine that rotating speed is 1500r/min and stirs
8min；In the step in Polystyrene-Polyethylene-polybutene-polystyrene copolymer comprising weight average molecular weight be 250,000 it is poly-
Styrene-polyethylene-polybutene-polystyrene copolymer 12g, the Polystyrene-Polyethylene-that weight average molecular weight is 0.8 ten thousand are poly-
Butylene-polystyrene copolymer 23g；
Sequentially added into above-mentioned mixing machine the mixtures of PP and PE materials, ethene-vinyl acetate copolymer, TPU and
Compatilizer prepared by 4g steps (1) continues to stir 9min；Then sequentially added into above-mentioned mixing machine β-(hydroxy phenyl -3 4-,
5- di-t-butyls) propionic acid n-octadecyl alcohol ester, neutral alumina and nano-titanium dioxide mixture, continue stir 7min i.e.
It can；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the master of screw rod should be set in the process
Machine rotating speed is 320r/min.
Embodiment 5：
The refrigerator sealing strip material of the present embodiment includes following components by weight：
Wherein, the weight ratio of neutral alumina and nano-titanium dioxide is 1: 2.2；In the mixture of PP and PE materials PP with
The weight ratio of PE is 2.0: 1.
The preparation method of above-mentioned refrigerator sealing strip material includes the following steps：
(1) preparation of compatilizer
Electron beam pre-irradiation, irradiation dose 50kGy, irradiation time 5min are carried out to 75g linear low density polyethylene；
10g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and
6min is stirred with the speed of 2500r/min in mixing machine, obtains mixture A；
12g glycidyl methacrylate, 12g Polystyrene-Polyethylenes-polybutene-polyphenyl are added into mixture A
Ethylene copolymer and 3g polyethylene glycol, and 10min is stirred with the speed of 1500r/min in mixing machine, obtain mixture B；It should
The polystyrene-for being 200,000 comprising weight average molecular weight in Polystyrene-Polyethylene-polybutene-polystyrene copolymer in step
Polyethylene-polybutene-polystyrene copolymer 4g, Polystyrene-Polyethylene-polybutene-polyphenyl that weight average molecular weight is 1.5 ten thousand
Ethylene copolymer 8g；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to compatilizer；The step
The blending extrusion temperature of twin screw compounder is set as in rapid：One 180 DEG C of area, two 190 DEG C of areas, three 200 DEG C of areas, four 210 DEG C of areas,
Five 220 DEG C of areas；The head extrusion temperature of twin screw compounder is set as 200 DEG C；Screw speed is set as 200r/min；
(2) preparation of premix
20g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with naphthenic oil HYN-1, makes polyphenyl
Ethylene-propylene-polybutene-polystyrene copolymer fully absorbs naphthenic oil HYN-1, this is absorbed naphthenic oil HYN-
1 Polystyrene-Polyethylene-polybutene-polystyrene copolymer is added in the mixing machine that rotating speed is 2500r/min and stirs
6min；In the step in Polystyrene-Polyethylene-polybutene-polystyrene copolymer comprising weight average molecular weight be 200,000 it is poly-
Styrene-polyethylene-polybutene-polystyrene copolymer 8g, the poly- fourth of Polystyrene-Polyethylene-that weight average molecular weight is 1.5 ten thousand
Alkene-polystyrene copolymer 12g；
Sequentially added into above-mentioned mixing machine the mixtures of PP and PE materials, ethene-vinyl acetate copolymer, TPU and
Compatilizer prepared by 12g steps (1) continues to stir 8min；Then 2,2 '-di-2-ethylhexylphosphine oxides are sequentially added into above-mentioned mixing machine
The mixture of (4- methyl-6-tert-butylphenols), neutral alumina and nano-titanium dioxide continues to stir 5min；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the master of screw rod should be set in the process
Machine rotating speed is 200r/min.
The refrigerator sealing strip material prepared to the various embodiments described above is tested for the property, and specific test result is as shown in table 1.
Wherein, tensile strength, elongation (%) are measured according to ASTM D412, and shrinking percentage (%) is measured according to ASTM D955, and shore is hard
It spends (Shore A) to be measured according to ASTM D2240, melt index (MFR) is measured according to ASTM D1238.
Table 1
| Test event | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Tensile strength (MPa) | 8.7 | 9.2 | 8.8 | 8.6 | 8.8 |
| Elongation (%) | 654.5 | 679.0 | 683.0 | 612.3 | 632.8 |
| Shrinking percentage (%) | 0.7-0.9 | 0.6-0.9 | 0.6-0.8 | 0.7-0.9 | 0.6-0.8 |
| Shore hardness (ShoreA) | 76 | 79 | 73 | 68 | 69 |
| Melt index (MFR) | 1.7 | 2.6 | 2.3 | 1.8 | 2.0 |
As it can be seen that the refrigerator sealing strip material of the present invention has preferable performance.
Polystyrene-Polyethylene-polybutene-polystyrene copolymer in the present invention is purchased from the macro good plastic material of Dongguan City
Co., Ltd, TPU engrave plastic material Co., Ltd purchased from Dongguan City one, and pp materials (polypropylene) are former purchased from the emerging sincere plastic cement of Dongguan City
Expect that Co., Ltd, PE materials (polyethylene) are purchased from Hangzhou Fang Sheng Chemical Co., Ltd.s, ethene-vinyl acetate copolymer is purchased from Dongguan
Gao Dong plastic cement Co., Ltd of city, neutral alumina are purchased from Shanghai edge titanizing chemical product Co., Ltd, and nano-titanium dioxide is purchased from nothing
Ze Hui Chemical Co., Ltd.s of tin city, naphthenic oil HYN-1 are purchased from Shandong Chen Xin Chemical Co., Ltd.s, and antioxidant is purchased from Nanjing rice Lan
Chemical Co., Ltd., linear low density polyethylene come from Shanghai a beautiful gem Hao plastic cement trade Co., Ltd, and Glycidyl methacrylate is sweet
Grease comes from Haiquan sunrise foreign trade Co., Ltd, and methacryloxypropyl silane is from the Shanghai sea ease limited public affairs of science and trade
Department, ethylene glycol (PEG400) come from Jiangsu Hai'an Petrochemical Plant.
Claims (3)
1. a kind of refrigerator sealing strip material, it is characterised in that be made by weight by following raw material：
The compatilizer includes following components by weight：
The weight ratio of PP and PE is 0.7~2.3: 1 in the mixture of the PP and PE materials；
The refrigerator sealing strip material is prepared by the following：
(1) preparation of compatilizer
60~90g linear low density polyethylene is taken to carry out Electron beam pre-irradiation, irradiation dose is 10~50kGy, irradiation time 5
~8min；
1~10g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and mixed
5~10min is stirred with the speed of 1000~3000r/min in conjunction machine, obtains mixture A；
It is poly- that 2~15g glycidyl methacrylate, 5~15g Polystyrene-Polyethylenes-polybutene-are added into mixture A
Styrol copolymer and 1~5g polyethylene glycol, and 10~20min is stirred with the speed of 1000~3000r/min in mixing machine,
Obtain mixture B；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to the compatilizer；
(2) preparation of premix
15~40g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with 5~20g naphthenic oils HYN-1,
So that Polystyrene-Polyethylene-polybutene-polystyrene copolymer is fully absorbed naphthenic oil HYN-1, this is absorbed into cycloalkane
The mixing that rotating speed is 1000~3000r/min is added in Polystyrene-Polyethylene-polybutene of oily HYN-1-polystyrene copolymer
5~8min is stirred in machine；Polystyrene-Polyethylene-polybutene-the polystyrene copolymer is by the poly- of high equimolecular quantity
Polystyrene-Polyethylene-polybutene-polyphenyl of styrene-polyethylene-polybutene-polystyrene copolymer and low molecular weight
Ethylene copolymer mixes, the weight of Polystyrene-Polyethylene-polybutene-polystyrene copolymer of the high equimolecular quantity
Average molecular weight is 16~250,000, the weight of Polystyrene-Polyethylene-polybutene-polystyrene copolymer of the low molecular weight
Equal part molecular weight is 0.5~20,000；Polystyrene-Polyethylene-polybutene-polystyrene copolymer of the high equimolecular quantity with
The weight ratio of Polystyrene-Polyethylene-polybutene-polystyrene copolymer of low molecular weight is 1: 1~2.5；
Mixture, the copolymerization of 5~15g ethane-acetic acid ethyenyls of 10~40g PP and PE materials are sequentially added into above-mentioned mixing machine
Compatilizer prepared by object, 5~30g TPU and 2~12g step (1), continues 7~10min of stirring；Then to above-mentioned mixing machine
In sequentially add 1~8g antioxidant and 8~28g inorganic minerals, continue 5~8min of stirring；During the inorganic mineral is
Property aluminium oxide and nano-titanium dioxide mixture, the weight ratio of the neutral alumina and nano-titanium dioxide is 1: 2~
2.5；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the host that should set screw rod in the process turns
Speed is 180~320r/min.
2. refrigerator sealing strip material according to claim 1, it is characterised in that：The antioxidant is anti-for phosphorous acid esters
One kind in oxygen agent, Hinered phenols antioxidant.
3. the preparation method of refrigerator sealing strip material described in a kind of claims 1 or 2, it is characterised in that include the following steps：
(1) preparation of compatilizer
60~90g linear low density polyethylene is taken to carry out Electron beam pre-irradiation, irradiation dose is 10~50kGy, irradiation time 5
~8min；
1~10g methacryloxypropyl silanes are uniformly sprinkling upon to the linear low density polyethylene surface after pre-irradiation, and mixed
5~10min is stirred with the speed of 1000~3000r/min in conjunction machine, obtains mixture A；
It is poly- that 2~15g glycidyl methacrylate, 5~15g Polystyrene-Polyethylenes-polybutene-are added into mixture A
Styrol copolymer and 1~5g polyethylene glycol, and 10~20min is stirred with the speed of 1000~3000r/min in mixing machine,
Obtain mixture B；
Mixture B is placed in twin screw compounder, carries out extruding graft, drying, granulation to get to the compatilizer；
(2) preparation of premix
15~40g Polystyrene-Polyethylenes-polybutene-polystyrene copolymer is mixed with 5~20g naphthenic oils HYN-1,
So that Polystyrene-Polyethylene-polybutene-polystyrene copolymer is fully absorbed naphthenic oil HYN-1, this is absorbed into cycloalkane
The mixing that rotating speed is 1000~3000r/min is added in Polystyrene-Polyethylene-polybutene of oily HYN-1-polystyrene copolymer
5~8min is stirred in machine；
Mixture, the copolymerization of 5~15g ethane-acetic acid ethyenyls of 10~40g PP and PE materials are sequentially added into above-mentioned mixing machine
Compatilizer prepared by object, 5~30g TPU and 2~12g step (1), continues 7~10min of stirring；Then to above-mentioned mixing machine
In sequentially add 1~8g antioxidant and 8~28g inorganic minerals, continue 5~8min of stirring；
(3) premix obtained by step (2) is placed in extrusion molding in twin screw compounder, the host that should set screw rod in the process turns
Speed is 180~320r/min.
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| CN201510121014.3A CN104774417B (en) | 2015-03-17 | 2015-03-17 | A kind of refrigerator sealing strip material and preparation method thereof |
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|---|---|---|---|
| CN201510121014.3A CN104774417B (en) | 2015-03-17 | 2015-03-17 | A kind of refrigerator sealing strip material and preparation method thereof |
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| CN104774417B true CN104774417B (en) | 2018-10-26 |
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| CN110591263A (en) * | 2019-08-21 | 2019-12-20 | 安徽万朗磁塑股份有限公司 | Low-temperature-resistant elastomer material for door seal of refrigerating device and application of low-temperature-resistant elastomer material |
| CN112778686A (en) * | 2020-12-30 | 2021-05-11 | 长虹美菱股份有限公司 | Antibacterial TPE door seal for refrigerator cabinet and preparation method thereof |
| CN113208326A (en) * | 2021-04-28 | 2021-08-06 | 何惠玲 | Edge banding strip for furniture and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532778A (en) * | 2010-12-31 | 2012-07-04 | 海尔集团公司 | Thermoplastic polyurethane elastomer (TPE) door seal for refrigerator and freezer and preparation method thereof |
| CN103725027A (en) * | 2013-12-27 | 2014-04-16 | 安徽科聚新材料有限公司 | High-resilience TPE (thermoplastic elastomer) material and preparation method thereof |
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|---|---|---|---|---|
| US6984688B2 (en) * | 2003-05-02 | 2006-01-10 | Gls Corp | Injection-moldable transparent thermoplastic elastomer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102532778A (en) * | 2010-12-31 | 2012-07-04 | 海尔集团公司 | Thermoplastic polyurethane elastomer (TPE) door seal for refrigerator and freezer and preparation method thereof |
| CN103725027A (en) * | 2013-12-27 | 2014-04-16 | 安徽科聚新材料有限公司 | High-resilience TPE (thermoplastic elastomer) material and preparation method thereof |
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Denomination of invention: Refrigerator sealing strip material and its preparation method Effective date of registration: 20221025 Granted publication date: 20181026 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Ningbo Yuyao sub branch Pledgor: Ningbo Riying Electric Appliance Co.,Ltd. Registration number: Y2022330002798 |