CN105437694B - A kind of heat-shrinkable E-PET composite membranes and its manufacturing method - Google Patents
A kind of heat-shrinkable E-PET composite membranes and its manufacturing method Download PDFInfo
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- CN105437694B CN105437694B CN201610027638.3A CN201610027638A CN105437694B CN 105437694 B CN105437694 B CN 105437694B CN 201610027638 A CN201610027638 A CN 201610027638A CN 105437694 B CN105437694 B CN 105437694B
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- extexine
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- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 239000012528 membrane Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 66
- 238000007639 printing Methods 0.000 claims abstract description 38
- 229920005989 resin Polymers 0.000 claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000012790 adhesive layer Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 claims abstract description 21
- 229920006132 styrene block copolymer Polymers 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 10
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000155 melt Substances 0.000 claims abstract 2
- 238000002360 preparation method Methods 0.000 claims abstract 2
- 238000005259 measurement Methods 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 9
- 230000000996 additive effect Effects 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 7
- 239000005977 Ethylene Substances 0.000 claims description 7
- 230000004927 fusion Effects 0.000 claims description 7
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- 229910052681 coesite Inorganic materials 0.000 claims description 5
- 229910052906 cristobalite Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052682 stishovite Inorganic materials 0.000 claims description 5
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 5
- 229910052905 tridymite Inorganic materials 0.000 claims description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 3
- 238000007334 copolymerization reaction Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical class CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 2
- 238000012661 block copolymerization Methods 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical group C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 125000004836 hexamethylene group Chemical class [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 229920001225 polyester resin Polymers 0.000 claims 1
- 239000004645 polyester resin Substances 0.000 claims 1
- 229920006300 shrink film Polymers 0.000 abstract description 14
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 238000004804 winding Methods 0.000 abstract description 4
- -1 extexine Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 description 13
- 229920000573 polyethylene Polymers 0.000 description 13
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 4
- 229920001634 Copolyester Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 229920006257 Heat-shrinkable film Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009975 flexible effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B37/08—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the cooling method
-
- 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
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
- B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
-
- 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
- B32B38/0036—Heat treatment
-
- 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
- B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- 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
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
-
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
-
- 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
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
- B32B2307/736—Shrinkable
-
- 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
- B32B2307/70—Other properties
- B32B2307/75—Printability
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Laminated Bodies (AREA)
Abstract
A kind of heat-shrinkable E PET composite membranes, including extexine, adhesive layer and printing layer.Adhesive layer is between extexine and printing layer.Extexine material is LLDPE resins and opening agent composition, and printing layer is the mixture of PETG resins and opening agent, and adhesive layer is styrene block copolymers (SBC) resin.Preparation method is by above-mentioned three kinds of materials after three sets of extrusions and filtration system, and three kinds of materials correspond to three sets of extrusion systems respectively.Three kinds of melts converge to T-shaped mould head and squeeze out slab.Die head is tri- runner T-shaped mould heads of ABC.Three kinds of materials squeeze out it is compound after slab using biaxial tension shape traction winding process after heat-shrinkable E PET composite membranes are made.The film shrunk range is wide, is mainly used to make heat shrinkage label, printing layer uses inner India side formula as colour image bearing bed.Thickness according to applicable cases shrink film is adjustable, can be adjustable according to applicable cases shrinking percentage in the upper limit shrinking.The present invention has excellent shrinkage and printing performance manufacture craft Simple integrated performance strong.
Description
Technical field
The present invention relates to packaging material field more particularly to a kind of heat-shrinkable E-PET composite membranes and its manufacturing methods.
Background technology
Heat shrinkage label belongs to sleeve label, is a kind of to be printed on heat shrinkable plastic film or plastic tube using ink special
On film label labeling when in a heated condition, shrink label will quickly along the outer profile of container shrink, be tightly attached to appearance
The effect of comprehensive packaging bottle " from top to bottom " is built on device surface.It is main applied to the heat shrink films of packaging field at present
There are polyvinyl chloride (PVC) heat shrink films, polyethylene (PE) heat shrink films, polystyrene (PS), PETG heat shrink films, multi-layer co-extruded
Polyolefin Heat Shrinkable Film (POF) etc..PVC heat shrink films printing performance is good, transparency is high, glossiness is good, but shrinking percentage is generally not
It can be more than 60%, in some special-shape bottles or require the application of high shrinkage (60% or more shrinking percentage) application field limited, and PVC film
Containing having plasticiser and cannot recycle；PE and POF heat shrink films flexibility is good, and impact resistance, tear resistance are strong, not fragile
It damages, is not afraid of tide, shrinks range extensively (shrinking percentage highest is adjustable to 80%), but printing performance is bad；PS films and PETG film light transmittances
With glossiness it is good, shrink that wide (shrinking percentage highest the is adjustable to 85%) mechanical strength of range is big, printing performance is good but rigid big hardness
Height, manufactured label feel are poor.E-PET heat-shrinkables composite membrane of the present invention, shrinks that range is wide, printing is good using PETG films
Well, high in combination with the good shrinking percentage of PE heat shrink films flexibility using PETG materials as printing layer the characteristics of high mechanical strength
Advantage is made using binding material by being cast compound rear biaxial tension using PE materials as extexine.The film, which has, to be shunk
The characteristics of range is wide, and flexibility is good, soft handle.It is cast compound rear biaxial tension and ensure that PE layers and PETG layers good consistent receipts
Shrinkage solves after being shunk caused by two kinds of Material shrinkages are inconsistent the problems such as film surface wrinkles, and film layer detaches.
Invention content
For deficiency existing for existing heat shrink films, it is an object of the present invention to provide a kind of environmental protection, printing is good, shrinks range
Extensively, flexibility is good, soft handle, tearing toughness is big, shrinks uniform heat shrink films and its manufacturing method.This kind of shrink film is made
Heat shrinkage label can print exquisite pattern, possess it is extensive be heat-shrinked range (shrinking percentage maximum can reach 80%), it is flexible
Property tear resistance is good, and feel is splendid, promotes the appearance of packed article.According to applicable cases, the thickness of above-mentioned shrink film can
It adjusts, it can be adjustable according to applicable cases shrinking percentage within the upper limit shrinking.
To achieve the goals above, the present invention is to realize by the following technical solutions：
1, a kind of heat-shrinkable E-PET composite membranes and its manufacturing method include the following steps in technical solution：
(1) composed structure：Composite membrane is by extexine, adhesive layer and printing layer is three-layer co-extruded is combined
(2) raw material forms：The raw material of extexine is the mixture of LLDPE resins and opening agent, and opening agent is containing 10-30%
Concentration SiO2Resist blocking and that masterbatch, additive amount be extexine total weight 1%-3%；Printing layer be copolyester PETG resins and
The mixture of opening agent, opening agent are the SiO of concentration containing 10-30%2Resist blocking and that masterbatch, additive amount is printing layer total weight
1%-3%；Adhesive layer is styrene block copolymers (SBC) resin.
(3) production procedure：It, will by the raw material of each layer by corresponding charging and extrusion fusing system and melt delivery system
Each layer melt is respectively fed to tri- runner die heads of ABC.A, tri- runner of B, C corresponds to extexine, adhesive layer and printing layer respectively.Above-mentioned three
After kind molten polymer converges extrusion at die head, by extrudate docile in sharp cooling roll, it is quickly cooled down slab；Then slab is passed through
It is vertically and horizontally stretched into stretching-machine after preheating, draw ratio is adjusted according to shrinking percentage and thickness, is drawn into film.It is last thin
Heat-shrinkable E-PET composite membranes are made by sizing, cooling, winding in film.
2, a kind of heat-shrinkable E-PET composite membranes, extexine is linear low density polyethylene (LLDPE) in technical solution.
3, a kind of heat-shrinkable E-PET composite membranes, linear low density polyethylene (LLDPE) resin used in extexine are ethylene
With a kind of copolymer in three kinds of monomers of 1- butylene or 1- hexenes or 1- octenes.Wherein comonomer accounts for ethylene and copolymerization
The 5%-10% weight fractions of monomer total amount.It is preferred that using 1- butylene as comonomer, comonomer accounts for ethylene and 1- butene monomers
8% weight fraction of total amount.
4, a kind of heat-shrinkable E-PET composite membranes, styrene block copolymers (SBC) used in adhesive layer in technical solution
Resin, preferably butadiene styrene block copolymerization object (SBS) resin.When adhesive layer selects SBS resins, preferred linear structure
SBS, average molecular weight 8-12 ten thousand, S/B (mass ratio) are 30/70.
5, a kind of heat-shrinkable E-PET composite membranes, copolyester (PETG) resin, characteristic used in printing layer in technical solution
Viscosity index (VI) is in 0.7dL/g or more.
6, a kind of heat-shrinkable E-PET composite membranes, the composite membrane general thickness are 40-80 μm.It is characterized in that each layer material
Outer skin thickness accounts for the 30%-40% of general thickness in material；Adhesive layer thickness accounts for the 10%-15% of general thickness；Print thickness
Degree accounts for the 45%-60% of general thickness.
7, its manufacturing method of a kind of heat-shrinkable E-PET composite membranes, is prepared as follows：
Step 1：The material LLDPE of extexine and opening agent are controlled into blanking ratio, opening agent by measurement charging device
Additive amount is the 1%-3% of extexine total weight, and twin screw vented extruders are entered after mixer makes material tentatively mix
Plastifying fusion enters die head by coarse filter, metering pump, quiet filter and static mixer；
Step 2：By bonding layer material styrene block copolymers (SBC) resin, preferably butadiene/styrene block is total
Polymers (SBS) resin controls blanking ratio by measurement charging device, and twin-screw is entered after mixer makes material tentatively mix
Vented extruder plastifying fusion enters die head by coarse filter, metering pump, quiet filter and static mixer；
Step 3：Layer material PETG resins will be printed and opening agent passes through measurement charging device and controls blanking ratio, opening
Agent additive amount is the 1%-3% of printing layer total weight, and twin-screw exhaust is entered after mixer makes material tentatively mix and is squeezed out
Machine plastifying fusion enters die head by coarse filter, metering pump, quiet filter and static mixer；
Step 4：Step 1: the high-temperature fusant that step 2 and step 3 are formed is incited somebody to action after tri- runner T-shaped mould heads of ABC extrusion
Extrudate docile is quickly cooled down into slab on sharp cooling roll.
Step 5：Slab is preheated in vertically and horizontally stretcher, by vertically and horizontally stretching, is shaped, cooling is online to survey
Thickness, winding.
8, a kind of heat-shrinkable E-PET composite membranes and its manufacturing method, in extrusion process extexine extruder plus
Work temperature is 60-230 DEG C, 220-230 DEG C of die head temperature；The processing temperature of printing layer extruder is 220-280 DEG C, die head temperature
260-270℃；80-235 DEG C of adhesive layer extruder processing temperature, 220-230 DEG C of die head temperature.Quench roll temperature controls when slab
At 30-40 DEG C.
9, a kind of heat-shrinkable E-PET composite membranes and its manufacturing method, 70-80 DEG C of longitudinal stretching preheating zone temperature are longitudinal
80-85 DEG C of draft temperature, 1-3 times of longitudinal stretching multiple；95-105 DEG C of cross directional stretch preheating zone temperature, transverse drawing temperature 80-
90 DEG C, 1-4.5 times of cross directional stretch multiple.
Beneficial effects of the present invention：
1, PE heat shrink films flexibility is good, and impact resistance, tear resistance are strong, not cracky, be not afraid of tide, shrink that range is wide (to be received
80%) shrinkage highest is adjustable to, but printing performance is bad；PETG films light transmittance and glossiness are good, shrinking range, extensively (shrinking percentage is most
85%) height is adjustable to that mechanical strength is big, printing performance is excellent but the big hardness of Film stiffness is high, and manufactured label feel is poor.This
Invention provides a kind of heat-shrinkable E-PET composite membranes, and extexine is PE films, and printing layer is PETG films.Middle layer is adhesive layer,
It is whole it to be bonded together composition by PE layers and PETG layers.This kind is heat-shrinked both flexibilities with PE films, and puncture resistant ability is strong, hand
Feel good advantage, and has the advantages that the PETG films high grade of transparency, high gloss, excellent printing performance.
2, PE heat shrink films currently on the market are blow molding mostly, and the technique is larger to the thickness deviation of film, thickness
Uniformity is difficult to control.Heat-shrinkable E-PET composite membranes of the present invention are cast stretch processes using squeezing out, can ensure simultaneously
The thickness evenness of PETG film layers and PE film layers realizes accurately controlling for heat-shrinkable PETG composite film thickness.
3, film manufacturing process of the present invention stretches using by the compound rear resynchronisation of PE film layers and PETG film layers curtain coating, ensures
The uniformity and consistency of heat-shrinkable E-PET composite membrane shrinking percentages.
Description of the drawings：
The present invention will be further described with embodiment below in conjunction with the accompanying drawings：
Fig. 1 is heat-shrinkable E-PET composite membranes film layer structure figure of the present invention；
Fig. 2 is the production technological process of heat-shrinkable E-PET composite membranes of the present invention.
Specific implementation mode：
Case study on implementation given below is the specific detailed description to the present invention, while it is pointed out here that implementation below is pair
The present invention's is further explained in detail, and limiting the scope of the invention is not to be construed as, if the technology known to this field
Personnel only make the improvement on non-intrinsically safe according to the content of present invention, will still belong to the scope of protection of the present invention.With reference to
Film layer structure Fig. 1 and flow chart 2 are specifically described：
1, as shown in Figure 1, the heat-shrinkable E-PET composite membranes are A/B/C structures, wherein A layers is extexine, extexine
Including LLDPE resins and opening agent, opening agent is containing 30% concentration SiO2Resist blocking and that masterbatch, additive amount be extexine total weight
2%；B layers are adhesive layers, and for bonding A layers and C layers, adhesive layer is SBC resins；C layers are printing layers, and printing layer includes PETG
Resin and opening agent, opening agent are containing 30% concentration SiO2Resist blocking and that masterbatch, additive amount be printing layer total weight 1.5%.
2, the composite membrane general thickness is 40 μm.Outer skin thickness is 15 μm in layers of material；Adhesive layer thickness is 5 μm；
It is 20 μm to print layer thickness.
3, linear low density polyethylene used in extexine (LLDPE) resin is ethylene and 1- butylene is comonomer, copolymerization
8% weight fraction of content of monomer；(SBC) resin of styrene block copolymers used in adhesive layer is total for butadiene/styrene block
Polymers (SBS) resin.This kind of SBS resin is linear structure, and average molecular weight 8-12 ten thousand, S/B (mass ratio) are 30/70；Printing
Copolyester (PETG) resin used in layer, inherent viscosity index is in 0.7dL/g or more.
4, heat-shrinkable E-PET composite membranes of the present invention and its manufacturing method, are prepared as follows：
Step 1：The material LLDPE of extexine and opening agent are controlled into blanking ratio, additive amount by measurement charging device
It is the 2% of extexine total weight, twin screw vented extruders i.e. extexine is entered after mixer makes material tentatively mix and is squeezed
Go out 1 plastifying fusion of machine, die head is entered by coarse filter, metering pump, quiet filter (fine filter) and static mixer；
Step 2：By bonding layer material styrene block copolymers (SBC) resin, preferably butadiene/styrene block is total
Polymers (SBS) resin controls blanking ratio by measurement charging device, and twin-screw is entered after mixer makes material tentatively mix
Vented extruder, that is, 2 plastifying fusion of adhesive layer extruder, by coarse filter, metering pump, quiet filter (fine filter) and
Static mixer enters die head；
Step 3：Layer material PETG resins will be printed and opening agent passes through measurement charging device and controls blanking ratio, addition
Amount is the 1.5% of printing layer total weight, is printed into twin screw vented extruders after mixer makes material tentatively mix
Layer 3 plastifying fusion of extruder, enters die head by coarse filter, metering pump, quiet filter (fine filter) and static mixer；
Step 4：Step 1: the high-temperature fusant that step 2 and step 3 are formed is after tri- runner T-shaped mould heads 4 of ABC extrusion,
By extrudate docile on sharp cooling roll, it is quickly cooled down into slab；
Step 5：Slab is preheated in vertically and horizontally stretcher, by vertically and horizontally stretching, is shaped, cooling is online to survey
Thickness, winding.
5, the compound film manufacturing methods of heat-shrinkable E-PET of the present invention, extexine in extrusion process
The processing temperature that four sections of extruder is 160,200,230,220 DEG C, 220-230 DEG C of die head temperature；Printing layer squeezes out
The processing temperature that four sections of machine is 220,270,280,270 DEG C；260-270 DEG C of die head temperature；The processing that four sections of adhesive layer extruder
Temperature is 120,220,235,230 DEG C, 220-230 DEG C of die head temperature.The control of Quench roll temperature is at 30-40 DEG C when slab.
6,70-80 DEG C of longitudinal stretching preheating zone temperature, 80-85 DEG C of longitudinal drawing temperature；Cross directional stretch preheating zone temperature 95-
105 DEG C, 80-90 DEG C of transverse drawing temperature.1.15 times of drawing zone longitudinal stretching multiple, 4 times of cross directional stretch multiple.
Claims (2)
1. a kind of heat-shrinkable E-PET composite membranes, it is characterized in that：Heat-shrinkable E-PET composite membranes are A-B-C structures, wherein A
Layer is extexine, and extexine is made of LLDPE resins and opening agent, and opening agent is 10-30% concentration SiO2Resist blocking and that masterbatch,
Additive amount is the 1%-3% of extexine total weight；B layers are adhesive layers, and for bonding A layers and C layers, adhesive layer is SBC resins；C
Layer is printing layer, and printing layer is made of PETG resins and opening agent, and opening agent is 10-30% concentration SiO2Resist blocking and that masterbatch,
Additive amount is the 1%-3% of printing layer total weight；
The composite membrane general thickness is 40-80 μm；Wherein, outer skin thickness accounts for the 30%-40% of composite membrane general thickness；It is viscous
Knot layer thickness accounts for the 10%-15% of composite membrane general thickness；Printing layer thickness accounts for the 45%-60% of composite membrane general thickness；
Linear low density polyethylene resin used in the extexine is for ethylene and selected from 1- butylene or three kinds of 1- hexenes or 1- octenes
A kind of copolymer in monomer, wherein comonomer account for ethylene and the 5%-10% weight fractions of comonomer total amount；With/
Or,
Styrene block copolymers resin used in adhesive layer is butadiene styrene block copolymerization resin；And/or the fourth two
Alkene styrene block copolymer resin is the SBS of linear structure, and the mass ratio of average molecular weight 8-12 ten thousand, S/B are 30/70；With/
Or,
Copolymer polyester resin used in printing layer, inherent viscosity index is in 0.7dL/g or more；
The preparation method of the heat-shrinkable E-PET composite membranes is：
Step 1：The material LLDPE of extexine and opening agent are controlled into blanking ratio, opening agent addition by measurement charging device
Amount is the 1%-3% of extexine total weight, and twin screw vented extruders are entered after mixer makes material tentatively mix and are plasticized
Melting, enters die head by coarse filter, metering pump, quiet filter and static mixer；Extexine squeezes in extrusion process
Four sections of processing temperature for going out machine is 160 DEG C, 200 DEG C, 230 DEG C, 220 DEG C, 220-230 DEG C of die head temperature；
Step 2：By bonding layer material styrene block copolymers resin, blanking ratio, warp are controlled by measurement charging device
Mixer enters twin screw vented extruders plastifying fusion after so that material is tentatively mixed, and passes through coarse filter, metering pump, quiet mistake
Filter and static mixer enter die head；
Step 3：Layer material PETG resins and opening agent will be printed, blanking ratio is controlled by measurement charging device, opening agent adds
Dosage is the 1%-3% of printing layer total weight, and twin screw vented extruders are entered after mixer makes material tentatively mix and are moulded
Change melting, die head is entered by coarse filter, metering pump, quiet filter and static mixer；Four sections of printing layer extruder adds
Work temperature is 220 DEG C, 270 DEG C, 280 DEG C, 270 DEG C, 260-270 DEG C of die head temperature；The processing temperature that four sections of adhesive layer extruder
It is 120 DEG C, 220 DEG C, 235 DEG C, 230 DEG C, 220-230 DEG C of die head temperature；
Step 4：Step 1: the high-temperature fusant that step 2 and step 3 are formed will squeeze out after tri- runner T-shaped mould heads of ABC extrusion
Object docile is quickly cooled down into slab on sharp cooling roll；
Step 5：Slab is preheated in vertically and horizontally stretcher, by vertically and horizontally stretching, is shaped, cooling, thickness measurement online is received
Volume；The control of Quench roll temperature is at 30-40 DEG C when slab；
Wherein, the melt of three kinds of extexine, adhesive layer, printing layer materials is respectively from three sets of extrusion systems, corresponding extruder point
It Wei not extexine extruder, adhesive layer extruder and printing layer extruder；Three kinds of high-temperature fusants converge to die head and realize three layers altogether
It squeezes, which is tri- runner T-shaped mould heads of ABC, and tri- runners of ABC correspond to the extexine, adhesive layer and printing of E-PET composite membranes respectively
Layer；
70-80 DEG C of longitudinal stretching preheating zone temperature, 80-85 DEG C of longitudinal drawing temperature, 1.15 times of longitudinal stretching multiple；Cross directional stretch
95-105 DEG C of preheating zone temperature, 80-90 DEG C of transverse drawing temperature, 4 times of cross directional stretch multiple.
2. a kind of heat-shrinkable E-PET composite membranes according to claim 1, which is characterized in that single for copolymerization with 1- butylene
Body, comonomer account for 8% weight fraction of ethylene and 1- butene monomers total amounts.
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| CN106273975B (en) * | 2016-08-01 | 2018-08-28 | 山东丰华塑胶科技有限公司 | A kind of parallel open polyester packages film and preparation method thereof |
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| CN113211921A (en) * | 2020-03-26 | 2021-08-06 | 河南银金达新材料股份有限公司 | Heat-shrinkable PETG (polyethylene terephthalate glycol) black-and-white composite film with light shielding property |
| CN111976252A (en) * | 2020-08-28 | 2020-11-24 | 河南银金达新材料股份有限公司 | Flexible thermal shrinkage composite film formed by tape casting and preparation method thereof |
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| CN117162624A (en) * | 2023-11-02 | 2023-12-05 | 河南达新源新材料有限公司 | Strong-oxygen curing type high-peeling-force PETG/PE/PET multilayer film and preparation method thereof |
| CN117261397B (en) * | 2023-11-21 | 2024-03-01 | 河南银金达新材料股份有限公司 | Shrinkage force controllable composite heat shrinkage film, production process and shrinkage force control method |
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