CN109776926A - A kind of PE heat shrink films and preparation method thereof - Google Patents
A kind of PE heat shrink films and preparation method thereof Download PDFInfo
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- CN109776926A CN109776926A CN201910154799.2A CN201910154799A CN109776926A CN 109776926 A CN109776926 A CN 109776926A CN 201910154799 A CN201910154799 A CN 201910154799A CN 109776926 A CN109776926 A CN 109776926A
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Abstract
The invention particularly discloses a kind of PE heat shrink films and preparation method thereof.PE heat shrink films provided by the invention are prepared by following raw material in parts by weight: 50~70 parts of low density polyethylene (LDPE), 15~22 parts of high density polyethylene (HDPE), 2~5 parts of polyvinyl alcohol, 2~5 parts of polyethylene wax, 1~4 part of diatomite, 1~5 part of calcium carbonate, 2~7 parts of kaolin, 5~15 parts of metallocene PE.The preparation of PE heat shrink films prepared by the present invention comprises the steps of；One, prepare related raw material according to the ratio, two, raw material is sent in reaction unit carries out pyroreaction, three, carry out mold molding, four, punching and cutting and rewinding, five, packed products.The advantages that a kind of preparation method of PE heat shrink films disclosed by the invention, the PE heat shrink films that this kind of method is prepared have flexibility good, and impact resistance, lear energy are strong, and cracky, humidity, transparency be not high, intensity is good, toughness is strong.
Description
Technical field
The present invention relates to PE heat-shrinkable film technology fields, and in particular to a kind of PE heat shrink films and preparation method thereof.
Background technique
Polyethylene (polyethylene abbreviation PE) is a kind of aggregated thermoplastic resin obtained of ethylene.Industrially,
It also include the copolymer of ethylene and a small amount of alpha-olefin.Polyethylene is odorless, nontoxic, feel ceraceous, has excellent resistance to low temperature
(minimum to use reachable -100~-70 DEG C of temperature), chemical stability is good, and the erosion for being resistant to most of soda acids (is aoxidized intolerant to having
The acid of property).Common solvent is not dissolved under room temperature, water imbibition is small, and electrical insulating property is excellent.
Because polyethylene has above-mentioned advantage, thus is widely used in being widely used in manufacturing film, hollow product, fiber
With the related supplies such as daily use Sundry goods, wherein making the most widely used for polyethylene heat-shrinkage film.
Polyethylene heat-shrinkage film is as one of polyethylene film staple product, impact resistance, tear resistance good with flexibility
By force, not cracky, be not afraid of tide, the advantages that shrinking percentage is big, be widely used in foreign export, papermaking, hardware, plastics, chemical industry, build
The relevant industries such as material, food medicine.
But although present polyethylene heat-shrinkage film has the above advantages and is widely used in all trades and professions, but it is certainly
Body still has some defects, and present polyethylene is mainly simple by addition high density polyethylene (HDPE) raising polyethylene heat-shrinkage film
Intensity, but the promotion of its other performance is also influenced, constrain its use scope, Material shrinkage performance, toughness and hardness
Deng all needing to be further increased, so as to its scope of application of further expansion.
Therefore, it is badly in need of the better polyethylene heat-shrinkage film of some performances, currently on the market to meet the need of Market Consumer
It asks.
Summary of the invention
For current PE heat shrink films in the market cannot requirement of the consumer for PE heat shrink films performance completely,
It still has several drawbacks, the problem not ideal enough to some PE heat shrink films performances, it is an object of that present invention to provide a kind of PE heat
Shrink film and preparation method thereof.
Blending and modifying is the effective ways for improving and improving polyethylene heat-shrinkage film performance, it can be more preferably by adjusting PE
The composition of heat shrink films, so that the correlated performances such as the shrinkage, the toughness that further improve PE heat shrink films more preferably meet market need
It asks, compared with present PE heat shrink films, the heat shrink films of blending and modifying is carried out by addition inorganic additive etc., it can be into one
Step improves its capability of resistance to radiation and tensile property etc., has better market value, more gets consumer reception.
To solve the above-mentioned problems, the present invention is resolved by the following technical programs:
A kind of PE heat shrink films, the raw material composition of following parts by weight: 50~70 parts of low density polyethylene (LDPE), high-density polyethylene
15~22 parts of alkene, 2~5 parts of polyvinyl alcohol, 2~5 parts of polyethylene wax, 5~10 parts of inorganic additive, metallocene PE 5~15
Part.
Preferably, the PE heat shrink films are made of the raw material of following parts by weight: 55~65 parts of low density polyethylene (LDPE),
15~20 parts of high density polyethylene (HDPE), 2~4 parts of polyvinyl alcohol, 2~5 parts of polyethylene wax, 6~9 parts of inorganic additive, metallocene is poly-
5~13 parts of ethylene.
It is highly preferred that the PE heat shrink films are made of the raw material of following parts by weight: low density polyethylene (LDPE) 55~60
Part, 15~20 parts of high density polyethylene (HDPE), 3 parts of polyvinyl alcohol, 2~4 parts of polyethylene wax, 6~8 parts of inorganic additive, metallocene is poly-
5~10 parts of ethylene.
Preferably, the density of the low density polyethylene (LDPE) are as follows: 0.920~0.925g/cm3, melt index be 0.28~
0.40。
Preferably, the density of the high density polyethylene (HDPE) is not less than 0.955g/cm3, melt index be 0.005~
0.018。
Preferably, the density of the metallocene PE is not less than 0.923~0.955g/cm3, melt index is
0.22~0.28.
Preferably, the inorganic additive is one or more of calcium carbonate, diatomite and kaolin.
It is highly preferred that inorganic additive is 1~5 part of calcium carbonate, 1~4 part of diatomite and 2~7 parts of kaolin.
Preferably, the PE heat shrink films preparation method comprising the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 50~75 DEG C, reaction
Time is 5~10min, is constantly stirred in the process；
S3. then, by various raw materials under the conditions of 155~185 DEG C, carry out high-temperature mixing, mixing time be 15~
60min；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and under cryogenic conditions
Sizing；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
It is highly preferred that the PE heat shrink films preparation method comprising the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 55~65 DEG C, reaction
Time is 5~9min, is constantly stirred in the process；
S3. then, by various raw materials under the conditions of 155~175 DEG C, carry out high-temperature mixing, mixing time be 35~
45min；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and under cryogenic conditions
Sizing；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
Preferably, it is formed under the cryogenic conditions, is fixed to 15~25 DEG C.
Be no longer satisfied the increasingly developed demand of every profession and trade for current PE heat shrink films, its own performance there is also
It is insufficient, toughness, tensile property and intensity etc. need to be further increased and improve, and it is an object of that present invention to provide a kind of PE heat
Shrink film and preparation method thereof, the PE heat shrink films prepared through the invention can further improve its own performance, more
Meets the needs of market well.
Specific embodiment
The present invention is further elaborated combined with specific embodiments below, the embodiment is served only for explaining this hair
It is bright, it is not intended to limit the scope of the present invention.Test method as used in the following examples is routine unless otherwise specified
Method；Used material, reagent etc., unless otherwise specified, for the reagent and material commercially obtained.
Embodiment 1
A kind of PE heat shrink films, are made of the raw material of following parts by weight: 55 parts of low density polyethylene (LDPE), high density polyethylene (HDPE)
15 parts, 3 parts of polyvinyl alcohol, 3 parts of polyethylene wax, 2 parts of calcium carbonate, 2 parts of diatomite, 3 parts of kaolin and 6 parts of metallocene PE.
A kind of PE heat shrink films preparation method comprising the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 50 DEG C, the reaction time
For 6min, constantly it is stirred in the process；
S3. then, by various raw materials under the conditions of 155 DEG C, high-temperature mixing, mixing time 20min are carried out；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and under cryogenic conditions
Sizing；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
Embodiment 2
A kind of PE heat shrink films, are made of the raw material of following parts by weight: 60 parts of low density polyethylene (LDPE), high density polyethylene (HDPE)
18 parts, 4 parts of polyvinyl alcohol, 2 parts of polyethylene wax, 3 parts of calcium carbonate, 3 parts of diatomite and 4 parts of kaolin, 9 parts of metallocene PE.
A kind of PE heat shrink films preparation method comprising the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 65 DEG C, the reaction time
For 8min, constantly it is stirred in the process；
S3. then, by various raw materials under the conditions of 170 DEG C, high-temperature mixing, mixing time 35min are carried out；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and under cryogenic conditions
Sizing；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
Embodiment 3
A kind of PE heat shrink films, are made of the raw material of following parts by weight: 65 parts of low density polyethylene (LDPE), high density polyethylene (HDPE)
19 parts, 4 parts of polyvinyl alcohol, 5 parts of polyethylene wax, 5 parts of calcium carbonate, 4 parts of diatomite and 5 parts of kaolin, 12 parts of metallocene PE.
A kind of PE heat shrink films preparation method comprising the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 72 DEG C, the reaction time
For 8min, constantly it is stirred in the process；
S3. then, by various raw materials under the conditions of 180 DEG C, high-temperature mixing, mixing time 55min are carried out；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and under cryogenic conditions
Sizing；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
Embodiment 4
A kind of PE heat shrink films, are made of the raw material of following parts by weight: 60 parts of low density polyethylene (LDPE), high density polyethylene (HDPE)
18 parts, 2 parts of polyvinyl alcohol, 2 parts of polyethylene wax, 1 part of calcium carbonate, 4 parts of diatomite and 7 parts of kaolin, 13 parts of metallocene PE.
A kind of PE heat shrink films preparation method comprising the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 62 DEG C, the reaction time
For 5min, constantly it is stirred in the process；
S3. then, by various raw materials under the conditions of 155 DEG C, high-temperature mixing, mixing time 42min are carried out；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and under cryogenic conditions
Sizing；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
One, radiation resistance is tested
Test sample: by above-mentioned PE heat shrink films 3 according to above-described embodiment prepared by preparation method of the present invention: sample
1~3 and PE heat shrink films available on the market: sample 4.
Index of this test using extension at break retention rate as measurement film degree of aging, and when defining this value up to 50%
Photooxidation resistance number of days or receiving radiation energy total amount (MJ/m2) it is aging life-span (relevant test data is as shown in table 1).
Elongation before elongation/aging after extension at break retention rate=aging
The test of 1 radiation resistance of table
From the data in table 1, it can be seen that relatively short with the service life of commercially available PE heat shrink films, the PE heat prepared through the invention is received
The anti-radiation service life of contracting film is relatively long, the capability of resistance to radiation of this display PE heat shrink films that through the invention prepared by preparation method
It is relatively strong.
Two, the test of the tensile strength, shrinking percentage and intensity of becoming thin of PE heat shrink films
Test sample: by above-mentioned PE heat shrink films 3 according to above-described embodiment prepared by preparation method of the present invention: sample
1~3 and PE heat shrink films available on the market: sample 4.
Tensile strength is according to GB/T 1040-1992 plastic tensile method for testing performance, respectively to the drawing of above-mentioned sample 1~4
Performance is stretched to be tested.
The measuring method of shrinking percentage, when folding diameter > 0.1m of separately sampled product 1~4, cut 0.1*0.1m monolithic sample, roll over
When diameter≤0.1m, taking 0.1m length and width is the monolithic sample for rolling over diameter (sample horizontal edge is vertical with flanging holding)；And to test piece respectively into
Line flag；Vertically and horizontally drawing a straight line in every sample respectively when test, and the ruler for being 0.1mm with precision measures respectively
The length value of straight line.Then making its free shrink 1 minute in the hot water of smooth 85 DEG C of the merging of sample, taking-up is cooled to room temperature,
Each length angle value is measured after paving again, according to correlation technique shrinkage from mold dimensions.
Relevant test data is as shown in table 2.
Tensile strength, shrinking percentage and the strength test of becoming thin of 2 PE heat shrink films of table
2 data of table show, and commercially available PE heat shrink films, and the tensile strength of PE heat shrink films prepared by the present embodiment wants bright
Aobvious to be greater than commercially available PE heat shrink films, this shows the preparation method of PE heat shrink films of the invention for promoting commercially available PE heat shrink films
It is helpful；With commercially available PE heat shrink films, the shrinking percentage of PE heat shrink films prepared by the present embodiment will be significantly less than commercially available PE heat
Shrink film, this shows that the preparation method of PE heat shrink films of the invention is preferable for the stability for improving PE heat shrink films；With city
PE heat shrink films are sold, the intensity of becoming thin of PE heat shrink films prepared by the present embodiment is also obviously improved, and shows PE of the invention
The preparation method of heat shrink films is effective for the overall performance for promoting PE heat shrink films.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (10)
1. a kind of PE heat shrink films and preparation method thereof, which is characterized in that the PE heat shrink films are by following parts by weight
Raw material composition: 50~70 parts of low density polyethylene (LDPE), 15~22 parts of high density polyethylene (HDPE), 2~5 parts of polyvinyl alcohol, polyethylene wax 2~
5 parts, 5~10 parts of inorganic additive, 5~15 parts of metallocene PE.
2. PE heat shrink films according to claim 1, which is characterized in that the PE heat shrink films are by following parts by weight
Raw material composition: 55~65 parts of low density polyethylene (LDPE), 15~20 parts of high density polyethylene (HDPE), 2~4 parts of polyvinyl alcohol, polyethylene wax 2
~5 parts, 6~9 parts of inorganic additive, 5~13 parts of metallocene PE.
3. PE heat shrink films according to claim 2, which is characterized in that the density of the low density polyethylene (LDPE) are as follows:
0.920~0.925g/cm3, melt index is 0.28~0.40.
4. PE heat shrink films according to claim 3, which is characterized in that the density of the high density polyethylene (HDPE) is not small
In 0.955g/cm3, melt index is 0.005~0.018.
5. PE heat shrink films according to claim 4, which is characterized in that the density of the metallocene PE is not small
In 0.923~0.955g/cm3, melt index is 0.22~0.28.
6. PE heat shrink films according to claim 5, which is characterized in that the inorganic additive is calcium carbonate, diatom
One or more of soil and kaolin.
7. PE heat shrink films according to claim 6, which is characterized in that the inorganic additive is calcium carbonate 1~5
Part, 1~4 part of diatomite and 2~7 parts of kaolin.
8. the preparation method of PE heat shrink films according to claim 7, which is characterized in that comprise the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 50~75 DEG C, the reaction time
For 5~10min, constantly it is stirred in the process；
S3. then, by various raw materials under the conditions of 155~185 DEG C, high-temperature mixing is carried out, mixing time is 15~60min；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and is fixed under cryogenic conditions
Type；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
9. the preparation method of PE heat shrink films according to claim 8, which is characterized in that comprise the steps of:
S1. prepare and weigh various raw materials according to formula；
S2. first various raw materials are fed separately to carry out pre- thermal agitation in reaction unit, reaction temperature is 55~65 DEG C, the reaction time
For 5~9min, constantly it is stirred in the process；
S3. then, by various raw materials under the conditions of 155~175 DEG C, high-temperature mixing is carried out, mixing time is 35~45min；
S4. the plastics that above-mentioned reaction obtains are moved in inflation film manufacturing machine group, blow extrusion is carried out to plastics, and is fixed under cryogenic conditions
Type；
S5. the thickness of the material of sizing is measured, and carries out folding arrangement；
S6. finally, being packed, finished product is obtained.
10. the preparation method of PE heat shrink films according to claim 9, which is characterized in that fixed under the cryogenic conditions
Type is fixed to 15~25 DEG C.
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| CN110845780A (en) * | 2019-10-31 | 2020-02-28 | 浙江比例聚合科技股份有限公司 | PE colorful heat shrinkable film and preparation method thereof |
| CN111073102A (en) * | 2019-12-13 | 2020-04-28 | 宁波市付枫塑业有限公司 | Low-temperature high-permeability toughened PE shrink film material and preparation method thereof |
| CN111846327A (en) * | 2020-07-22 | 2020-10-30 | 山东野迈塑胶有限公司 | Full-degradable PE heat shrinkable film |
| CN113621199A (en) * | 2021-09-02 | 2021-11-09 | 四川厚诚新材料有限公司 | Thermal shrinkage casting PE film and preparation method thereof |
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Cited By (5)
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|---|---|---|---|---|
| CN110845780A (en) * | 2019-10-31 | 2020-02-28 | 浙江比例聚合科技股份有限公司 | PE colorful heat shrinkable film and preparation method thereof |
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| CN111846327A (en) * | 2020-07-22 | 2020-10-30 | 山东野迈塑胶有限公司 | Full-degradable PE heat shrinkable film |
| CN113621199A (en) * | 2021-09-02 | 2021-11-09 | 四川厚诚新材料有限公司 | Thermal shrinkage casting PE film and preparation method thereof |
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Application publication date: 20190521 |