PE temperature difference film and the medical top bag for using the PE temperature difference film preparation
Technical field
The invention belongs to field of packaging material, and in particular to PE temperature difference film and medical using the PE temperature difference film preparation
Come directly towards bag.
Background technique
What plastic flexible packaging material generally referred to be made of plastics or plastic composite, it is usually soft, it can pass through
The modes such as bag making, package realize the packaging to commodity, and the temperature difference of existing temperature difference film, ectonexine tolerance is smaller, therefore, in heat
During envelope, it is easy to occur heat-sealing temperature it is high when, sealing part deformation and flatness it is poor, when heat-sealing temperature is low, although sealing
It is smooth, but easily occur loosely with empty Feng Xianxiang, therefore, a kind of temperature difference film of the big temperature difference of R & D design, to improve bag making mistake
The flatness and firmness sealed in journey very it is necessary to.
Top bag is used for the packaging of medical product, such as the packaging of medical gloves, hemostatic gauze, operating coat protective garment
On, existing top bag, the removing mouth being safely opened, which generallys use spy, to be defended strong material and hotly joins with bag body, and existing top
Head bag spy defend in strong paster stripping process usually exist figure glue-line transfer unevenly have tiny transparent lines and brocken spectrum, or
Person is destroyed because the excessively high spy of sealing-strength defends strong paster gluing paper layer in stripping process, tears rear paper scrap and stays in rubberised layer,
It is be easy to cause the pollution of built-in curable product, therefore designs a kind of top bag, it is ensured that spy defends strong gluing paper and coating transfer uniformly, table
Face Glabrous side phenomenon very it is necessary to.
Summary of the invention
Aiming at the problems existing in the prior art, what the present invention designed be designed to provide a kind of PE temperature difference film and using should
The medical top bag of PE temperature difference film preparation.
The present invention is realized by the following technical programs:
The PE temperature difference film, it is characterised in that the PE temperature difference film is by the outer layer of high melting point, support middle layer, low melting point
Layer composition, the outer layer is 15-20 DEG C higher than internal layer tolerable temperature, which is 60-90 μm, and outer layer thickness accounts for film thickness
The 27-30% of degree, support intima-media thickness account for the 36-40% of film thickness, and internal layer thickness accounts for the 27-30% of film thickness.
The PE temperature difference film, it is characterised in that the outer layer is made of the raw material of following parts by weight, 50% Tao Shi
2036,25% Mitsui Chemicals 2320H, 25% Yangba 2426H.
The PE temperature difference film, it is characterised in that the support middle layer is made of the raw material of following parts by weight, 50% Yangba
2420H, 50% Tao Shi 5401G.
The PE temperature difference film, it is characterised in that the internal layer is made of the raw material of following parts by weight, 25% Tao Shi
1881G, 50% Mitsui Chemicals SP1520,25% Yangba 2426H.
The PE temperature difference film, it is characterised in that outer layer highest tolerable temperature is 125 DEG C.
The PE temperature difference film, it is characterised in that the PE temperature difference film is prepared using following steps:
1) each layer raw material for choosing process stipulation respectively obtain each layer premix after high speed mixer premixes;
2) each layer premix is drawn into respectively in each layer extruder storaging bucket, set preheated different temperature chargings, plasticizing,
It is kneaded viscous liquid state;
3) it is kneaded viscous liquid state and enters mold and converge rear coextrusion die head and required to be filled with pressure according to product size in elastomeric state shape
Contracting air inflation finally forms a film through vane cooling and shaping;
4) most afterwards through deflector roll winding, packaging.
The PE temperature difference film, it is characterised in that each layer extruder temperature setting stepwise in step 2, the specially area 1-2 are pre-
Section or fluxing zone, the area 5-6 mixing section, each zone temperatures setting are melted in hot arc, the area 3-4 are as follows:
Outer layer: 1 165 DEG C of area, 2 175 DEG C of areas, 185 DEG C of -4th area, 3rd area, 180 DEG C of -6th area, 5th area;
Middle layer: 1 160 DEG C of area, 2 165 DEG C of areas, 175 DEG C of -4th area, 3rd area, 170 DEG C of -6th area, 5th area;
Internal layer: 1 150 DEG C of area, 2 160 DEG C of areas, 165 DEG C of -4th area, 3rd area, 160 DEG C of -6th area, 5th area.
The medical top bag of the PE temperature difference film preparation, it is characterised in that including the upper bag body using the film preparation of the PE temperature difference
With lower bag body, spy defend strong paster, the upper bag body and lower bag body two sides and bottom end alignment after by banding realize overlap joint tie
Structure, the spy defend strong paster and pass through banding and the connection of underseal realization and upper bag body and lower bag body.
The medical top bag using PE temperature difference film preparation, it is characterised in that the upper bag body and lower bag body are by interior
Layer, support middle layer and outer layer composition, and the inner layer contacts of the internal layer of upper bag body and lower bag body are arranged.
The medical top bag using PE temperature difference film preparation, it is characterised in that one end of strong paster bonding is defended with spy
The length of lower bag body be longer than the length of upper bag body, the spy defends and is connected between strong paster and lower bag body by internal layer underseal,
Spy defends and is connected between strong paster and upper bag body by outer layer underseal.
The described medical top bag using PE temperature difference film preparation, it is characterised in that the internal layer underseal and outer layer underseal
Heat-sealing pulling force is 3.5-4N/15mm.
Compared with prior art, the present invention there are following the utility model has the advantages that
1) there are 15-20 DEG C of the temperature difference between this temperature difference film ectonexine, it is ensured that the flatness of banding and the fastness of banding;
2) it using the top bag of the temperature difference film preparation, realizes when spy defends strong paster glass without paper scrap fibre shedding, glue-line transfer
Uniformly, meet the requirement being safely opened.
Detailed description of the invention
Fig. 1 is temperature difference film preparation process flow chart of the present invention;
Fig. 2 is the structural schematic diagram for coming directly towards bag;
Fig. 3 is the layer structure figure of PE temperature difference film;
In figure, 1- outer layer, 2- supports middle layer, and 3- internal layer, 4- upper bag body, 5- lower bag body, 6- spy defends strong paster, 7- banding, 8-
Underseal, 9- internal layer underseal, 10- outer layer underseal.
Specific embodiment
Below in conjunction with Figure of description, present invention is further described in detail, and provides specific embodiment.
Embodiment 1
With a thickness of 60 μm of PE temperature difference film, the outer layer of the high melting point for being 125 DEG C by highest tolerable temperature, low melts at support middle layer
Change the internal layer composition of point, specific structure is shown in Fig. 3, and wherein outer layer thickness is 18 μm, and support middle layer is 24 μm, and internal layer is 18 μm, outside
Layer is 15-20 DEG C higher than internal layer tolerable temperature, and the outer layer of the temperature difference film is made of the raw material of following parts by weight, 50% Tao Shi 2036,
25% Mitsui Chemicals 2320H, 25% Yangba 2426H;Support middle layer is made of the raw material of following parts by weight, 50% Yangba
2420H, 50% Tao Shi 5401G;Internal layer is made of the raw material of following parts by weight, 25% Tao Shi 1881G, 50% Mitsui Chemicals
SP1520,25% Yangba 2426H.
The specific preparation process of the PE temperature difference film is as follows, and Fig. 1 is shown in specific process flow,
1) each layer raw material for choosing process stipulation respectively obtain each layer premix after high speed mixer premixes;2) each layer is premixed
Material is drawn into respectively in each layer extruder storaging bucket, is set preheated different temperature charging, plasticizing, is kneaded viscous liquid state;3)
It is kneaded viscous liquid state and enters mold and converge rear coextrusion die head and required to be filled with compressed air according to product size in elastomeric state shape
Inflation finally forms a film through vane cooling and shaping;4) it is most placed afterwards through deflector roll winding, packaging, top tray, storage.Each layer extruder temperature
Setting stepwise, the specially area 1-2 preheating section are spent, section or fluxing zone, the area 5-6 mixing section, each zone temperatures setting are melted in the area 3-4
Are as follows:
Outer layer: 1 165 DEG C of area, 2 175 DEG C of areas, 185 DEG C of -4th area, 3rd area, 180 DEG C of -6th area, 5th area;
Middle layer: 1 160 DEG C of area, 2 165 DEG C of areas, 175 DEG C of -4th area, 3rd area, 170 DEG C of -6th area, 5th area;
Internal layer: 1 150 DEG C of area, 2 160 DEG C of areas, 165 DEG C of -4th area, 3rd area, 160 DEG C of -6th area, 5th area.
Embodiment 2
The PE temperature difference film of the present embodiment the difference from embodiment 1 is that, with a thickness of 90 μm, outer layer thickness is 24.3 μm, in support
Layer is 32.4 μm, and internal layer is 24.3 μm, other are the same as embodiment 1.
Embodiment 3
The medical top bag of PE temperature difference film preparation prepared using above-described embodiment 1, specific structure is shown in Fig. 1, including uses upper bag body
With lower bag body, spy defend strong paster, upper bag body and lower bag body two sides and bottom end alignment after by banding realize bridging arrangement, spy
Strong paster is defended by banding and the connection of underseal realization and upper bag body and lower bag body, upper bag body and lower bag body by internal layer, branch
Middle layer and outer layer composition are supportted, and the inner layer contacts of the internal layer of upper bag body and lower bag body are arranged, the one of strong paster bonding is defended with spy
The length of the lower bag body at end is longer than the length of upper bag body, and spy defends and connected between strong paster and lower bag body by internal layer underseal, special
It defends and is connected between strong paster and upper bag body by outer layer underseal.The heat-sealing pulling force of the internal layer underseal and outer layer underseal is 3.5-
4N/15mm。
Its performance test data of PE temperature difference film and detection method of embodiment 1 are as follows:
Using the top bag of the above structure of the PE temperature difference film preparation, heat-sealing pulling force is moderate, not only guarantees the fastness of bonding, but also
It convenient for fast and safely removing, less than the minimum value of the heat-sealing pulling force, then bonds loosely, easily opens, most greater than the heat-sealing pulling force
, then easily there is clast in big value when removing, pollutes content.