CN105733066A - Special-purposed material used for preparing heat shrink film, and preparation method thereof - Google Patents
Special-purposed material used for preparing heat shrink film, and preparation method thereof Download PDFInfo
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- CN105733066A CN105733066A CN201410746370.XA CN201410746370A CN105733066A CN 105733066 A CN105733066 A CN 105733066A CN 201410746370 A CN201410746370 A CN 201410746370A CN 105733066 A CN105733066 A CN 105733066A
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Abstract
The invention relates to a special-purposed material used for preparing a heat shrink film, and a preparation method thereof. The special-purposed material is composed of base resin and at least one modified resin. The base resin is an ethylene free radical homopolymer. The modified resin is at least one selected from an ethylene-propylene copolymer and an ethylene-butene copolymer. The special-purposed material is a material obtained through mixed melting and extrusion granulation of the base resin and the at least one modified resin. The high-strength heat shrink film special-purposed material is a mixture of the ethylene free radical homopolymer and one or two selected from the ethylene-propylene copolymer and the ethylene-butene copolymer. The ethylene free radical homopolymer accounts for 70-95%. The ethylene-propylene copolymer accounts for 5-30%. The ethylene-butene copolymer accounts for 5-30%. The high-strength heat shrink film special-purposed material is composed of ethylene and copolymer thereof. The modified resin provides functional groups, such that the special-purposed material reaches a shrinkage rate index. The functional resin is uniformly dispersed, and the performance is stable. The material has no other auxiliary agent added, and the raw materials are relatively pure.
Description
Technical field
The present invention relates to a kind of PP Pipe Compound for producing high-strength hot shrink film, especially a kind of wrapping heat shrink films.
Background technology
Heat shrink films has the advantages such as hot strength height, transparency height and shrinkage factor are good, it is widely used in the whole collection packaging of scattered commodity, the packaging of irregular commodity and replacement for small casing packaging, goods transportation and packing cost more than 30% can be reduced, be in recent years rapidly developed.
The key performance of heat shrink films is the good hot strength of requirement and shrinkage factor, and therefore, this patent is for the performance requirement of heat shrink films, the preparation method that have developed a kind of high-strength hot shrink film PP Pipe Compound.
The main path preparing high-strength hot shrink film PP Pipe Compound has:
(1) various auxiliary agents are weighed in proportion, mix with polyethylene carrier resin, in a heated condition, prepared by double screw extruder extruding pelletization.
(2) various blending resins, function additive are weighed in proportion, mixing, in a heated condition, prepared by dual-screw pelletizer extruding pelletization.
CN1966245 patent proposes a kind of method producing heat shrink films for regenerated polythene, the coextrusion process adopted is: monolayer expressing technique: 25% regenerated polythene (without opening agent, slipping agent), the linear low density polyethylene (LLDPE) (metallocene linear low density polyethylene of available 5%-10% improves intensity) of 74.4-74.8%, 0.2-0.6% viscosifier；Two layers of coextrusion process: the regenerated polythene of 95% and functional master batch, the linear low density polyethylene (LLDPE) of 5% and viscosifier (0.2-0.6% is viscosifier, the linear low density polyethylene (LLDPE) of 4.8-4.4%)；Three-layer co-extruded technique: the linear low density polyethylene (LLDPE) of (a layer) 5% and viscosifier (0.2-0.6% is viscosifier, the linear low density polyethylene (LLDPE) of 4.8-4.4%)；(two layers) 10% linear low density polyethylene (LLDPE) (virgin material) and functional master batch；(three layers) 85% regenerates linear low density polyethylene (LLDPE) or regeneration Low Density Polyethylene and metallocene linear low density polyethylene and functional master batch.
CN103360664A patent proposes a kind of High-transparency polyolefin heat shrinkage film and production method thereof, it is characterized in that: High-transparency polyolefin heat shrinkage film is extruded through single screw extrusion machine by the linear low density polyethylene of 25-35 weight portion, the ethylene-octene copolymer of 20-30 weight portion, the Low Density Polyethylene of 34-54 weight portion and the auxiliary agent of 1 weight portion, extrusion die then through monolayer inflation film manufacturing machine is extruded into pipe, and pipe cooling rear haulage entrance drawing oven carries out the horizontal and vertical drawing process of certain multiple and produces.
CN103331969 patent proposes multi-layer co-extrusion two-way stretching Fowl meat packaging shrink film and preparation method thereof, it is characterized in that: this shrink film gross thickness is 0.03mm-0.10mm, this shrink film is three-layer co-extruded forming, and ground floor is the mixture of ethylene-vinyl acetate copolymer EVA and linear low density polyethylene LLDPE；The second layer is ethylene-vinyl acetate copolymer EVA, third layer is the mixture of linear low density polyethylene LLDPE and low density polyethylene, each layer raw material is separately added into each layer extruder and carries out melting plasticizing, then pass through mould extrusion, form a multilayer film base, through heating inflation, biaxial tension, cooling, after obtaining required folding footpath, shrinkage factor, finished product rolling.
Summary of the invention
It is an object of the invention to provide a kind of PP Pipe Compound for preparing heat shrink films, to solve the heat shrink films PP Pipe Compound of prior art adds the defect of auxiliary agent.
For achieving the above object, the present invention provides a kind of PP Pipe Compound for preparing heat shrink films, being made up of with at least one modified resin base resin, described base resin is ethylene free radical homopolymer, and described modified resin is at least one in ethylene-propylene copolymer or ethylene-butene copolymer.
Further, described PP Pipe Compound is the material that described base resin obtains with described at least one modified resin mixed melting extruding pelletization.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is ethylene-propylene copolymer, and the percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 5～30%；Or described base resin is ethylene free radical homopolymer, described modified resin is ethylene-butene copolymer, and the percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-butene copolymer is 5～30%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 70～95%, the percentage by weight of described ethylene-propylene copolymer is 2.5～15%, and the percentage by weight of described ethylene-butene copolymer is 2.5～15%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 75～85%, the percentage by weight of described ethylene-propylene copolymer is 10～15%, and the percentage by weight of described ethylene-butene copolymer is 5～10%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 80%, the percentage by weight of described ethylene-propylene copolymer is 10%, and the percentage by weight of described ethylene-butene copolymer is 10%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 75%, the percentage by weight of described ethylene-propylene copolymer is 15%, and the percentage by weight of described ethylene-butene copolymer is 10%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 85%, the percentage by weight of described ethylene-propylene copolymer is 10%, and the percentage by weight of described ethylene-butene copolymer is 5%.
In the described PP Pipe Compound for preparing heat shrink films, the molecular weight of described ethylene free radical homopolymer is 15000-25000.
In the described PP Pipe Compound for preparing heat shrink films, the molecular weight of described ethylene-propylene copolymer is 45000-65000.
In the described PP Pipe Compound for preparing heat shrink films, the molecular weight of described ethylene-butene copolymer is 40000-60000.
And, for achieving the above object, the preparation method that the present invention proposes a kind of PP Pipe Compound for preparing heat shrink films, it is made up of following steps:
Step 1: ethylene free radical homopolymer is mixed with at least one in ethylene-propylene copolymer, ethylene-butene copolymer；And
Step 2: will mix material, joins in double screw extruder, in the molten state, extrudes granulating.
Wherein, ethylene free radical homopolymer is mixed by step 1 with ethylene-propylene copolymer；The percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 5～30%；Or ethylene free radical homopolymer is mixed by step 1 with ethylene-butene copolymer；The percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-butene copolymer is 5～30%.
Wherein, ethylene free radical homopolymer is mixed by step 1 with ethylene-propylene copolymer and ethylene-butene copolymer；The percentage by weight of wherein said ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 2.5～15%, and the percentage by weight of described ethylene-butene copolymer is 2.5～15%.
The present invention has the effect that；
(1) high-strength hot shrink film PP Pipe Compound forms by ethylene and copolymer thereof, does not contain other materials；
(2) being provided functional group by modified resin in the present invention, make PP Pipe Compound reach shrinkage factor index, hot strength is high, and functional resin is uniformly dispersed, stable performance；
(3) the high-strength hot shrink film PP Pipe Compound of the present invention is added without other auxiliary agent, and raw material is pure, and the course of processing is without dust, environmentally friendly.
(4) high-strength hot shrink film preparation method for material special technique of the present invention is simple, only with by ethylene and copolymer thereof, it is not necessary to other auxiliary agents, can be made into shrinkage factor good, the heat shrink films PP Pipe Compound that hot strength is high.
Detailed description of the invention
The present invention provides a kind of PP Pipe Compound for preparing heat shrink films, it is made up of with at least one modified resin base resin, described base resin is ethylene free radical homopolymer, and described modified resin is at least one in ethylene-propylene copolymer or ethylene-butene copolymer.
Further, described PP Pipe Compound is the material that described base resin obtains with described at least one modified resin mixed melting extruding pelletization.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is ethylene-propylene copolymer, and the percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 5～30%；Or described base resin is ethylene free radical homopolymer, described modified resin is ethylene-butene copolymer, and the percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-butene copolymer is 5～30%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 70～95%, the percentage by weight of described ethylene-propylene copolymer is 2.5～15%, and the percentage by weight of described ethylene-butene copolymer is 2.5～15%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 75～85%, the percentage by weight of described ethylene-propylene copolymer is 10～15%, and the percentage by weight of described ethylene-butene copolymer is 5～10%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 80%, the percentage by weight of described ethylene-propylene copolymer is 10%, and the percentage by weight of described ethylene-butene copolymer is 10%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 75%, the percentage by weight of described ethylene-propylene copolymer is 15%, and the percentage by weight of described ethylene-butene copolymer is 10%.
In the described PP Pipe Compound for preparing heat shrink films, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 85%, the percentage by weight of described ethylene-propylene copolymer is 10%, and the percentage by weight of described ethylene-butene copolymer is 5%.
In the described PP Pipe Compound for preparing heat shrink films, the molecular weight of described ethylene free radical homopolymer is 15000-25000.
In the described PP Pipe Compound for preparing heat shrink films, the molecular weight of described ethylene-propylene copolymer is 45000-65000.
In the described PP Pipe Compound for preparing heat shrink films, the molecular weight of described ethylene-butene copolymer is 40000-60000.
The concrete scheme of the present invention is to be mixed in proportion being used for producing the base resin of high-strength hot shrink film PP Pipe Compound with one or both modified resin, joins in double screw extruder, through melt extruding, cooling granulation, prepares high-strength hot shrink film PP Pipe Compound.
Most preferred PP Pipe Compound scheme is that ethylene free radical homopolymer mixes use with ethylene-propylene copolymer, ethylene-butene copolymer three kinds, heat shrink films has good Kekelé structure count and mechanical property, and using method is flexible, can on polyethylene production device or polyethylene film processing factory use.
The present invention proposes to be previously used for the preparation method of preparing the PP Pipe Compound of heat shrink films, ethylene free radical homopolymer mix use with one or both in ethylene-propylene copolymer, ethylene-butene copolymer, and this preparation method is made up of following steps:
Step 1: ethylene free radical homopolymer is mixed with at least one in ethylene-propylene copolymer, ethylene-butene copolymer；And
Step 2: will mix material, joins in double screw extruder, in the molten state, extrudes granulating.
Wherein, ethylene free radical homopolymer is mixed by step 1 with ethylene-propylene copolymer；The percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 5～30%；Or ethylene free radical homopolymer is mixed by step 1 with ethylene-butene copolymer；The percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-butene copolymer is 5～30%.
Wherein, ethylene free radical homopolymer is mixed by step 1 with ethylene-propylene copolymer and ethylene-butene copolymer；The percentage by weight of wherein said ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 2.5～15%, and the percentage by weight of described ethylene-butene copolymer is 2.5～15%.
Incorporation time suitable in process described in said method step 1 is 10-30 minute, and best mixing time is 15-20min.Main production equipments is double screw extruder.
The product obtained in aforementioned manners, is high intensity of the present invention for preparing the PP Pipe Compound of heat shrink films.
Embodiment:
Illustrate: the material ratio % in literary composition is mass percent.
This technological innovation part is in that:
(1) high-strength hot shrink film PP Pipe Compound forms by ethylene and copolymer thereof；
(2) being provided functional group by modified resin in the present invention, make PP Pipe Compound reach shrinkage factor index, hot strength is high, and functional resin is uniformly dispersed, stable performance；
(3) adding without other auxiliary agent, raw material is purer, and the course of processing is without dust, environmentally friendly.
(4) high-strength hot shrink film preparation method for material special technique of the present invention is simple, only with by ethylene and copolymer thereof, it is not necessary to other auxiliary agents, can be made into shrinkage factor good, the heat shrink films PP Pipe Compound that hot strength is high, shrinkage factor is close to 80%, and hot strength is close to 20MPa.
Certainly; the present invention also can have other various embodiments; when without departing substantially from present invention spirit and essence thereof, those of ordinary skill in the art can make various corresponding change and deformation according to the present invention, but these change accordingly and deform the protection domain that all should belong to the claims in the present invention.
Claims (14)
1. the PP Pipe Compound being used for preparing heat shrink films, it is characterized in that, being made up of with at least one modified resin base resin, described base resin is ethylene free radical homopolymer, and described modified resin is at least one in ethylene-propylene copolymer or ethylene-butene copolymer.
2. PP Pipe Compound is the material that described base resin obtains with described at least one modified resin mixed melting extruding pelletization according to claim 1.
3. the PP Pipe Compound for preparing heat shrink films according to claim 1, it is characterized in that, described base resin is ethylene free radical homopolymer, described modified resin is ethylene-propylene copolymer, the percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 5～30%；Or described base resin is ethylene free radical homopolymer, described modified resin is ethylene-butene copolymer, and the percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-butene copolymer is 5～30%.
4. the PP Pipe Compound for preparing heat shrink films according to claim 1, it is characterized in that, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 70～95%, the percentage by weight of described ethylene-propylene copolymer is 2.5～15%, and the percentage by weight of described ethylene-butene copolymer is 2.5～15%.
5. the PP Pipe Compound for preparing heat shrink films according to claim 4, it is characterized in that, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 75～85%, the percentage by weight of described ethylene-propylene copolymer is 10～15%, and the percentage by weight of described ethylene-butene copolymer is 5～10%.
6. the PP Pipe Compound for preparing heat shrink films according to claim 5, it is characterized in that, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 80%, the percentage by weight of described ethylene-propylene copolymer is 10%, and the percentage by weight of described ethylene-butene copolymer is 10%.
7. the PP Pipe Compound for preparing heat shrink films according to claim 5, it is characterized in that, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 75%, the percentage by weight of described ethylene-propylene copolymer is 15%, and the percentage by weight of described ethylene-butene copolymer is 10%.
8. the PP Pipe Compound for preparing heat shrink films according to claim 5, it is characterized in that, described base resin is ethylene free radical homopolymer, described modified resin is the mixture of ethylene-propylene copolymer, ethylene-butene copolymer, the percentage by weight of wherein said ethylene free radical homopolymer is 85%, the percentage by weight of described ethylene-propylene copolymer is 10%, and the percentage by weight of described ethylene-butene copolymer is 5%.
9. the PP Pipe Compound for preparing heat shrink films according to claim 1, it is characterised in that the molecular weight of described ethylene free radical homopolymer is 15000-25000.
10. the PP Pipe Compound for preparing heat shrink films according to claim 1, it is characterised in that the molecular weight of described ethylene-propylene copolymer is 45000-65000.
11. the PP Pipe Compound for preparing heat shrink films according to claim 1, it is characterised in that the molecular weight of described ethylene-butene copolymer is 40000-60000.
12. the preparation method of the PP Pipe Compound for preparing heat shrink films of claim 1, it is characterised in that be made up of following steps:
Step 1: ethylene free radical homopolymer is mixed with at least one in ethylene-propylene copolymer, ethylene-butene copolymer；And
Step 2: will mix material, joins in double screw extruder, in the molten state, extrudes granulating.
13. the preparation method of the PP Pipe Compound for preparing heat shrink films according to claim 12, it is characterised in that in step 1, ethylene free radical homopolymer is mixed with ethylene-propylene copolymer；The percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 5～30%；Or ethylene free radical homopolymer is mixed by step 1 with ethylene-butene copolymer；The percentage by weight of described ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-butene copolymer is 5～30%.
14. the PP Pipe Compound for preparing heat shrink films according to claim 1, it is characterised in that in step 1, ethylene free radical homopolymer is mixed with ethylene-propylene copolymer and ethylene-butene copolymer；The percentage by weight of wherein said ethylene free radical homopolymer is 70～95%, and the percentage by weight of described ethylene-propylene copolymer is 2.5～15%, and the percentage by weight of described ethylene-butene copolymer is 2.5～15%.
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| CN201410746370.XA CN105733066A (en) | 2014-12-08 | 2014-12-08 | Special-purposed material used for preparing heat shrink film, and preparation method thereof |
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| CN201410746370.XA CN105733066A (en) | 2014-12-08 | 2014-12-08 | Special-purposed material used for preparing heat shrink film, and preparation method thereof |
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| CN105733066A true CN105733066A (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106218159A (en) * | 2016-07-19 | 2016-12-14 | 杭州德雅包装有限公司 | A kind of heat shrink films and utilize the packaging material that this heat shrink films makes |
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| CN106218159A (en) * | 2016-07-19 | 2016-12-14 | 杭州德雅包装有限公司 | A kind of heat shrink films and utilize the packaging material that this heat shrink films makes |
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