CN106113853A - A kind of multi-layer co-extruded sealing strip for liquid packing box and production method - Google Patents
A kind of multi-layer co-extruded sealing strip for liquid packing box and production method Download PDFInfo
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- CN106113853A CN106113853A CN201610482191.9A CN201610482191A CN106113853A CN 106113853 A CN106113853 A CN 106113853A CN 201610482191 A CN201610482191 A CN 201610482191A CN 106113853 A CN106113853 A CN 106113853A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B41/00—Arrangements for controlling or monitoring lamination processes; Safety arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/04—Polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2377/00—Polyamides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of multi-layer co-extruded sealing strip for liquid packing box and production method, belong to wrapping sealing strip technical field, this preparation method uses the form of co-extrusion, is jointly extruded by die head of film blowing machine in the molten state by different material, obtains well-bedded sealing strip.This sealing strip seven-layer structure altogether, is followed successively by a PE layer, the 2nd PE layer, the 3rd PA layer, the 4th PA layer, the 5th PA layer, the 6th PE layer and the 7th PE layer from top to bottom.The method reducing compound manufacturing procedure, it is to avoid the problems such as the dissolvent residual caused because of compound, have efficiently, the advantage of high finished product rate, sealing strip has uniform film thickness, and has higher production efficiency and product quality.
Description
Technical field
The invention belongs to wrapping sealing strip technical field, be specifically related to a kind of multi-layer co-extruded for liquid packing box
Sealing strip and production method.
Background technology
Multi-layer co-extruded sealing strip is a kind of by the multi-layer co-extruded equipment coextrusion of multiple raw material, has certain barriers function,
Two-sided low-temperature heat-sealing is good, is suitably applied liquid food, the sealing of beverage package box seam crossing.
The sealing strip of conventional composite, production technology is simple, and a coextrusion mold need to use special material through two-way
Stretching is formed just can have some strength, and does not substantially have the diaphragm of draftability, is then passed through the two-sided pouring re-heat of another procedure
Closure material forms hot sealing layer, and production technology is complex, causes production cost to improve.
The multi-layer co-extruded sealing strip film of the present invention uses co-extrusion technology, is that different materials passes through inflation film manufacturing machine in the molten state
Die head is extruded jointly, formed have different structure, well arranged, have barriers function and two-sided low-temperature heat-sealing novel seal material
Material.Decrease and drench multiple manufacturing procedure, it is to avoid because drenching multiple and problems such as the wasting of resources that causes.Not only increase thin film strong
Degree, has good low-temperature heat-sealing performance, it is achieved fast package simultaneously.
Summary of the invention
In order to overcome the deficiency stated in background technology, the present invention provides a kind of multi-layer co-extruded for liquid packing box
Sealing strip and production method, this sealing strip be have different structure, well arranged, have barriers function and two-sided low-temperature heat-sealing
Sealing material, it is possible to meet the use demand of multiple liquid packing box on market.This preparation method uses the form of co-extrusion,
Different materials is extruded jointly by die head of film blowing machine in the molten state, obtains well-bedded sealing strip, decrease compound
Manufacturing procedure, it is to avoid the problems such as the dissolvent residual caused because of compound, have efficiently, the advantage of high finished product rate, make sealing
Bar has uniform film thickness, it is ensured that higher production efficiency and product quality.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of multi-layer co-extruded sealing strip for liquid packing box, described multi-layer co-extruded sealing strip has seven-layer structure,
It is followed successively by a PE layer, the 2nd PE layer, the 3rd PA layer, the 4th PA layer, the 5th PA layer, the 6th PE layer and the 7th PE from top to bottom
Layer；
The thickness of the oneth PE layer is 18～22 μm, and the thickness of the 2nd PE layer is 6～10 μm, the thickness of the 3rd PA layer be 4～
10 μm, the thickness of the 4th PA layer is 12～18 μm, and the thickness of the 5th PA layer is 4～10 μm, and the thickness of the 6th PE layer is 6～10 μ
M, the thickness of the 7th PE layer is 18～22 μm.
Oneth PE layer and the 7th PE layer are hot sealing layer, have low-temperature heat-sealing function；2nd PE layer and the 6th PE layer are bonding
The effect of layer, bonding PA and PE；3rd PA layer, the 4th PA layer and the 5th PA layer make thin film have certain hot strength and stretching
Rigidity.
A kind of multi-layer co-extruded sealing strip production method for liquid packing box, the step of this production method is:
(1) preparation of raw material and weighing: prepare feed particles according to the component of multi-layer co-extruded sealing strip seven-layer structure, pass through
Feed particles is respectively fed to the loading hopper of correspondence by material suction device and weighing apparatus；
(2) heating sheared by extruder: the feed particles in its loading hopper is carried out shearing heating by seven extruders respectively,
Raw material under molten condition, and it is delivered to die head by interface；Each extruder is provided with five heating regions, successively to former
Material granule heats；
(3) die head blow extrusion: seven layers of fused raw material extrusion are merged by the extrusion in circular die, and have inflation film manufacturing machine to blow
Swollen device carries out inflation to thin film and obtains film bubble；
(4) vane cooling: being provided with hot spot on vane, film bubble runs up under draw, by vane air blast pair
Film bubble cools down, and according to thickness measurement system, the film bubble thickness data of a week is transferred to control system and controls the temperature of hot spot
Degree, to adjust the thin and thick deviation of film bubble；Vane from the outer circumference of film bubble to film bubble quenching, and the air blast inside film bubble
Film bubble can be made to remain inflated for, it is simple to carry out cooling down, the operation such as thickness adjustment；
(5) sizing cage: by the height of sizing cage, the size of the adjustment stable bubble of diameter, to control the width of film bubble
Degree；
(6) traction: film bubble is gradually crushed through collapser, is provided with one with the traction iron rod driven at traction
With a traction dandy roll, film bubble is elevated by traction；
(7) correction: control film bubble in traction iron rod and traction dandy roll centre position through horizontal deviation-rectifying system, it is simple to receive
Volume end face is neat；
(8) cutting burst: film bubble cut the multi-layer co-extruded sealing strip into two panels by cutting knife cutting mechanism；
(9) rolling: by A, B two Scrolls rolling respectively, obtains multi-layer co-extruded sealing strip, and often volume rice numerical control system is 3500
Rice.
Preferably, seven extruders in step (2) process the ground floor of multi-layer co-extruded sealing strip respectively to layer 7
Feed particles, the structure of seven extruders is consistent, the feed opening of each extruder, first thermal treatment zone, second thermal treatment zone, Acanthopanan trifoliatus (L.) Merr.
The temperature of hot-zone, the 4th thermal treatment zone, the 5th thermal treatment zone and die head is respectively:
First extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, the second extruder: 50 DEG C,
215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, the 3rd extruder: 120 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
250 DEG C, 250 DEG C, the 4th extruder: 185 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, the 5th extruder:
120 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, the 6th extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
215 DEG C, 215 DEG C, 215 DEG C, the 7th extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
The temperature of inflation film manufacturing machine huffing device: 250 DEG C.
Preferably, in step (4), the hot spot of vane is provided with 48 altogether, and hot spot is evenly distributed in inside vane
Face.
The temperature of each extruder above-mentioned specifically can adjust according to practical situation, it can be ensured that processes raw materials melt
Optimum efficiency, and ensure the optimum temperature of each raw material when film head is extruded, it is ensured that each layer can effectively bond, and protects
Demonstrate,proving multi-layer co-extruded sealing strip hierarchical structure clearly demarcated, heating for multiple times also can reduce the loss of the energy the most in batches, reaches energy-conserving and environment-protective
Purpose.
The invention have the advantage that the present invention is applicable to the sealing of liquid beverage packaging box, low-temperature heat-sealing performance is good；Cut into
After bar, bar body is smooth non-warping indeformable, walks machine steady, can realize fast package, it is possible to meet client various on packer
The use requirement of filling machine.This sealing strip have different structure, well arranged, have barriers function and two-sided low-temperature heat-sealing new
Type encapsulant.Decrease and drench multiple manufacturing procedure, it is to avoid because drenching multiple and problems such as the wasting of resources that causes, improve production
Efficiency, reduces production cost.There is excellent hot strength, there is good low-temperature heat-sealing performance simultaneously, can realize quickly
Packaging.
Accompanying drawing explanation
Fig. 1 is the structural representation of the multi-layer co-extruded sealing strip of the present invention；
Fig. 2 is the extruder structure schematic diagram used by the present invention；
Fig. 3 is the huffing device structural representation used by the present invention.
Symbol description in figure: 1, a PE layer；2, the 2nd PE layer；3, the 3rd PA layer；4, the 4th PA layer；5, the 5th PA layer；
6, the 6th PE layer；7, the 7th PE layer；8, loading hopper；9, extruder；10, die head；11, film bubble；12, vane；13, hot spot；14、
Sizing cage；15, traction iron rod；16, traction dandy roll；17, feed opening；18, first thermal treatment zone；19, second thermal treatment zone；20,
Three thermals treatment zone；21, the 4th thermal treatment zone；22, the 5th thermal treatment zone；23, collapser.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated:
Embodiment 1
A kind of multi-layer co-extruded sealing strip production method for liquid packing box, the step of this production method is:
(1) preparation of raw material and weighing: prepare feed particles according to the component of multi-layer co-extruded sealing strip seven-layer structure, pass through
Feed particles is respectively fed to the loading hopper 8 of correspondence by material suction device and weighing apparatus；
(2) heating sheared by extruder 9: seven extruders 9 carry out shearing to the feed particles in its loading hopper 8 respectively and add
Heat, seven extruders 9 are processed the ground floor feed particles to layer 7 of multi-layer co-extruded sealing strip respectively, are obtained under molten condition
Raw material, and be delivered to die head 10 by interface；Each extruder 9 is provided with five heating regions, enters feed particles successively
Row heating；
(3) die head 10 blow extrusion: seven layers of fused raw material extrusion are merged by the extrusion in circular die 10, and have blown film
Machine huffing device carries out inflation to thin film and obtains film bubble 11；
(4) vane 12 cools down: be provided with 48 hot spots 13 on vane 12, and hot spot 13 is evenly distributed in vane 12
Side；Film bubble 11 runs up under draw, vane 12 air blast cool down film bubble 11, according to thickness measurement system
The film bubble thickness data of 11 1 weeks is transferred to control system and controls the temperature of hot spot 13, inclined to adjust the thin and thick of film bubble 11
Difference；Vane 12 is from the outer circumference of film bubble 11 to film bubble 11 quenching, and the air blast inside film bubble 11 can make film bubble 11
Remain inflated for, it is simple to carry out cooling down, the operation such as thickness adjustment；
(5) sizing cage 14: by the height of sizing cage 14, the size of the adjustment stable bubble 11 of diameter, to control film
The width of bubble 11；
(6) traction: film bubble 11 is gradually crushed through collapser 23, is provided with one with the traction driven at traction
Iron rod 15 and a traction dandy roll 16, film bubble 11 is elevated by traction；
(7) correction: control film bubble 11 through horizontal deviation-rectifying system and at traction iron rod 15 and draw dandy roll 16 centre position,
It is easy to rolling end face neat；
(8) cutting burst: film bubble 11 cut the multi-layer co-extruded sealing strip into two panels by cutting knife cutting mechanism；
(9) rolling: by A, B two Scrolls rolling respectively, obtain multi-layer co-extruded sealing strip；
The ground floor raw material to layer 7 of multi-layer co-extruded sealing strip processed respectively by seven extruders 9 in step (2)
Grain, the structure of seven extruders 9 is consistent, 18, second thermal treatment zone, feed opening 17, first thermal treatment zone the 19, the 3rd of each extruder 9
The temperature of the thermal treatment zone 22, the thermal treatment zone the 21, the 5th, the thermal treatment zone the 20, the 4th and die head 10 is respectively:
First extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
Second extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
3rd extruder: 120 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
4th extruder: 185 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
5th extruder: 120 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
6th extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
7th extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
The temperature of inflation film manufacturing machine huffing device: 250 DEG C.
The temperature of each extruder 9 above-mentioned specifically can adjust according to practical situation, it can be ensured that processes raw materials melt
Optimum efficiency, and ensure the optimum temperature of each raw material when film head 10 is extruded, it is ensured that each layer can effectively bond,
Ensureing that multi-layer co-extruded sealing strip hierarchical structure is clearly demarcated, heating for multiple times also can reduce the loss of the energy the most in batches, reaches energy-saving ring
The purpose protected.
Film bubble 11 Thickness sensitivity in the present embodiment, hot spot 13 heat, cutting burst and the operation of rolling, are existing
Mature technology, those of ordinary skill in the art can realize aforesaid operations and produce a desired effect, being not described herein at this.
Embodiment 2
The preparation method using embodiment 1 prepares multi-layer co-extruded sealing strip, and described multi-layer co-extruded sealing strip is seven layers
Structure, is followed successively by PE layer the 1, the 2nd PE layer the 2, the 3rd PA layer the 3, the 4th PA layer the 4, the 5th PA layer the 5, a 6th PE layer from top to bottom
6 and the 7th PE layer 7；
The thickness of the oneth PE layer 1 is 18 μm, and the thickness of the 2nd PE layer 2 is 6 μm, and the thickness of the 3rd PA layer 3 is 4 μm, the 4th
The thickness of PA layer 4 is 12 μm, and the thickness of the 5th PA layer 5 is 4 μm, and the thickness of the 6th PE layer 6 is 6 μm, and the thickness of the 7th PE layer 7 is
18μm；
Oneth PE layer 1 and the 7th PE layer 7 are hot sealing layer, have low-temperature heat-sealing function；2nd PE layer 2 and the 6th PE layer 6 are
The effect of adhesive layer, bonding PA and PE；It is strong that 3rd PA layer the 3, the 4th PA layer 4 and the 5th PA layer 5 make thin film have certain stretching
Degree and stretching rigidity.
Embodiment 3
The preparation method using embodiment 1 prepares multi-layer co-extruded sealing strip, and described multi-layer co-extruded sealing strip is seven layers
Structure, is followed successively by PE layer the 1, the 2nd PE layer the 2, the 3rd PA layer the 3, the 4th PA layer the 4, the 5th PA layer the 5, a 6th PE layer from top to bottom
6 and the 7th PE layer 7；
The thickness of the oneth PE layer 1 is 22 μm, and the thickness of the 2nd PE layer 2 is 10 μm, and the thickness of the 3rd PA layer 3 is 10 μm, the
The thickness of four PA layers 4 is 18 μm, and the thickness of the 5th PA layer 5 is 10 μm, and the thickness of the 6th PE layer 6 is 10 μm, the thickness of the 7th PE layer 7
Degree is 22 μm；
Other parts are completely the same with embodiment 2.
Embodiment 4
The preparation method using embodiment 1 prepares multi-layer co-extruded sealing strip, and described multi-layer co-extruded sealing strip is seven layers
Structure, is followed successively by PE layer the 1, the 2nd PE layer the 2, the 3rd PA layer the 3, the 4th PA layer the 4, the 5th PA layer the 5, a 6th PE layer from top to bottom
6 and the 7th PE layer 7；
The thickness of the oneth PE layer 1 is 20 μm, and the thickness of the 2nd PE layer 2 is 8 μm, and the thickness of the 3rd PA layer 3 is 7 μm, the 4th
The thickness of PA layer 4 is 15 μm, and the thickness of the 5th PA layer 5 is 7 μm, and the thickness of the 6th PE layer 6 is 8 μm, and the thickness of the 7th PE layer 7 is
20μm；
Other parts are completely the same with embodiment 2.
Properties of product detect:
Multi-layer co-extruded sealing strip acquired by embodiment 2,3,4 is carried out properties of product detection, and detection project includes: product
Heat-sealing temperature, tensile property, intensity, product peeling force and elongation at break.
Product heat-sealing temperature detection method: play envelope temperature 105 DEG C, heat-sealing temperature 125 DEG C, seals pressure 0.2MPa, heat-sealing
Time 1min.Standard: when thin film and packaging material are torn, packaging material top layer PE layer can be pulled open as qualified by thin film.
The standard of tensile property detection is " GB/T104.3 ", uses pulling method and cupping machine to carry out performance detection.
The standard of intensity detection is " GB/T9639.1 ", uses pulling method and cupping machine to carry out performance detection.
Product peeling force detection method: with hands by thin film interlayer strip off, is cut into 15mm width, tests pulling force, draw speed
For 200mm/min.Standard: peeling force is qualified more than 7N/15mm.
Elongation at break detection method: prepare sample, 7.5mm width, 10cm spacing, draw speed 500mm/min, every time
Detection is not less than 4.Standard: average data elongation at break≤240%, the highest is less than 260%, for qualified products.
Using said method and the performance of standard detection product, testing result is shown in Table 1, and analysis and arrangement obtains following result:
(1), when thin film and packaging material are torn, packaging material top layer PE layer can be pulled open by thin film, product heat-sealing temperature conformance with standard；
(2) tensile property and intensity meet respective standard；
(3) experiment of product peeling force is carried out three times, and data are shown in Table 1, the average data conformance with standard of three times；
(4) elongation at break detection has been carried out four times, and data are shown in Table 1, the average data conformance with standard of four times.
Table 1 properties of product testing result
It is last that it is noted that obviously above-described embodiment is only for clearly demonstrating example of the present invention, and also
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-form.Here without also cannot all of embodiment be given exhaustive.And thus drawn
What Shen went out obviously changes or changes among still in protection scope of the present invention.
Claims (4)
1. the multi-layer co-extruded sealing strip for liquid packing box, it is characterised in that described multi-layer co-extruded sealing strip has
Seven-layer structure, is followed successively by a PE layer, the 2nd PE layer, the 3rd PA layer, the 4th PA layer, the 5th PA layer, the 6th PE layer from top to bottom
With the 7th PE layer；
The thickness of the oneth PE layer is 18 ~ 22 μm, and the thickness of the 2nd PE layer is 6 ~ 10 μm, and the thickness of the 3rd PA layer is 4 ~ 10 μm, the
The thickness of four PA layers is 12 ~ 18 μm, and the thickness of the 5th PA layer is 4 ~ 10 μm, and the thickness of the 6th PE layer is 6 ~ 10 μm, the 7th PE layer
Thickness be 18 ~ 22 μm；
Oneth PE layer and the 7th PE layer are hot sealing layer, and the 2nd PE layer and the 6th PE layer are adhesive layer.
2. the multi-layer co-extruded sealing strip production method for liquid packing box, it is characterised in that the step of this production method
For:
(1) preparation of raw material and weighing: prepare feed particles according to the component of multi-layer co-extruded sealing strip seven-layer structure, pass through suction
Feed particles is respectively fed to the loading hopper of correspondence by device and weighing apparatus；
(2) heating sheared by extruder: the feed particles in its loading hopper is carried out shearing heating by seven extruders respectively, is melted
Melt the raw material under state, and be delivered to die head by interface；
(3) die head blow extrusion: seven layers of fused raw material extrusion are merged by the extrusion in circular die, and have inflation film manufacturing machine inflation to fill
Put and thin film is carried out inflation obtain film bubble；
(4) vane cooling: being provided with hot spot on vane, film bubble runs up under draw, by vane air blast to film bubble
Cool down, according to thickness measurement system, the film bubble thickness data of a week be transferred to control system and control the temperature of hot spot,
To adjust the thin and thick deviation of film bubble；
(5) sizing cage: by the height of sizing cage, the size of the adjustment stable bubble of diameter, to control the width of film bubble；
(6) traction: film bubble is gradually crushed through collapser, is provided with one with the traction iron rod and driven at traction
Root traction dandy roll, film bubble is elevated by traction；
(7) correction: control film bubble in traction iron rod and traction dandy roll centre position through horizontal deviation-rectifying system, it is simple to rolling end
Face is neat；
(8) cutting burst: film bubble cut the multi-layer co-extruded sealing strip into two panels by cutting knife cutting mechanism；
(9) rolling: by A, B two Scrolls rolling respectively, obtain multi-layer co-extruded sealing strip.
A kind of multi-layer co-extruded sealing strip production method for liquid packing box, it is characterised in that
The ground floor feed particles to layer 7 of multi-layer co-extruded sealing strip processed respectively by seven extruders in step (2), and seven are squeezed
The structure going out machine is consistent, the feed opening of each extruder, first thermal treatment zone, second thermal treatment zone, the 3rd thermal treatment zone, the 4th heating
The temperature of district, the 5th thermal treatment zone and die head is respectively:
First extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
Second extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
3rd extruder: 120 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
4th extruder: 185 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
5th extruder: 120 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C, 250 DEG C,
6th extruder: 50 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, the 7th extruder: 50 DEG C, 215
DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C, 215 DEG C,
The temperature of inflation film manufacturing machine huffing device: 250 DEG C.
A kind of multi-layer co-extruded sealing strip production method for liquid packing box, it is characterised in that
In step (4), the hot spot of vane is provided with 48 altogether, and hot spot is evenly distributed in vane medial surface.
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| CN113459469A (en) * | 2020-03-15 | 2021-10-01 | 聚银塑料包装制品（深圳）有限公司 | Method for detecting layer thickness deviation and distribution of POF blown film co-extrusion die head discharge pipe |
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