CN108995336B - Print compound polyethylene film and preparation method thereof - Google Patents
Print compound polyethylene film and preparation method thereof Download PDFInfo
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- CN108995336B CN108995336B CN201810664700.9A CN201810664700A CN108995336B CN 108995336 B CN108995336 B CN 108995336B CN 201810664700 A CN201810664700 A CN 201810664700A CN 108995336 B CN108995336 B CN 108995336B
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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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- 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
- 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
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
Abstract
Belong to polyethylene film technical field with polyethylene film and preparation method thereof the invention discloses a kind of printing is compound, its key points of the technical solution are that it with polyethylene film includes internal layer, middle layer and outer layer that printing is compound；The internal layer includes LDPE, m-VLDPE, m-LLDPE, opening agent and PPA auxiliary agent, LDPE, m-VLDPE, m-LLDPE, opening agent and PPA auxiliary agent weight ratio be (35-45): (25-35): (25-35): (2-4): (0.5-1)；The middle layer includes LDPE, m-LLDPE and PPA auxiliary agent, and the weight ratio of LDPE, m-LLDPE and PPA auxiliary agent is (40-50): (50-60): (0.5-1.5)；The outer layer includes LDPE, m-VLDPE, m-LLDPE and PPA auxiliary agent, and the weight ratio of LDPE, m-VLDPE, m-LLDPE and PPA auxiliary agent is (15-25): (35-45): (35-45): (1-2).The phenomenon that present invention is selected without slipping agent and the polyvinyl resin of the high grade of transparency, can improve polyethylene film to the adsorption capacity of ink, reduce deinking, has reached the technical effect that can be improved inner print effect.
Description
Technical field
The present invention relates to polyethylene film technical fields, more specifically, it is related to, a kind of printing is compound to use polyethylene thin
Film and preparation method thereof.
Background technique
Polyethylene film, i.e. PE film, refer to PE produce film, can be divided into low density polyethylene (LDPE) (LDPE), in
Density polyethylene (MDPE), high density polyethylene (HDPE) (HDPE) and crosslinked polyethylene；Low-density polyethylene film is a kind of semi-transparent
The good film of bright, high glaze, heat sealability, have excellent chemical stability, heat sealability, water resistance and moisture resistance, freeze-resistant,
Can boiling, be usually used in the internal layer membrane of composite soft packaging material, and most widely used, the maximum a kind of plastic bag of dosage at present
Film is filled, 40% or more of plastic film consumption is accounted for about.
The prior art can refer to the Chinese patent of Authorization Notice No. CN102179985B, and it discloses a kind of polyethylene films
And preparation method thereof, polyethylene film successively includes: composite layer, middle layer and hot sealing layer；Composite layer includes: 25wt%-
The modified cyclopentadienyl gold of the low density polyethylene (LDPE) of 40wt%, the linear low density polyethylene of 25wt%-40wt% and 33wt%-45wt%
Belong to linear low density polyethylene；The middle layer includes: the low density polyethylene (LDPE) and 50wt%-75wt% of 25wt%-50wt%
Linear low density polyethylene；Hot sealing layer include: 28wt%-35wt% low density polyethylene (LDPE) and 65wt%-72wt% it is linear
Low density polyethylene (LDPE).
In actual use, many plastic films for packaging need to carry out printing treatment, wherein common printer
Skill be table print, table print refer on a plastic film printing after, the process after bag making etc., the picture and text of printing on the surface of finished product at
The technique of type, table print printing is mostly using polyolefin films such as polyethylene, polypropylene as stock；But due in LDPE molecule containing only
There are two kinds of elements of C, H, not polar functionalities, and crystallinity is high, surface free energy is low, and cause the affinity of LDPE and ink poor,
Printing effect when surface printing is poor, and easy the phenomenon that appearing in deinking, and the aesthetics after packaging is poor；Therefore printing surface must be into
Row sided corona treatment, but will lead to the heat sealability decline of polyethylene film after sided corona treatment again.
The printing of plastic film is other than table prints technique, and there are also inner print technique, inner print refers to the print with reversed picture and text
Ink, is transferred to the inside of transparent printable fabric, thus the printing process of the front face surface erect image picture and text in stock by version；Its
Advantage be it is bright in luster, it is colour-fast, do not fade, damp-proof wear-resistant；Inner-printing ink after printing, can be on the printing surface of stock
Compound layer of plastic film again；But since low density polyethylene (LDPE) is translucent material, print will lead to using the technique of inner print
The picture and text of brush are unintelligible, and inner print effect is bad；Therefore the transparency of polyethylene film how is improved to improve and print effect in it
Fruit is a problem to be solved.
Summary of the invention
One of the objects of the present invention is to provide a kind of compound polyethylene films of printing, are free of slipping agent by selecting
The polyvinyl resin of ingredient can improve the adsorption capacity of ink, using the polyvinyl resin of the high grade of transparency and low haze, cooperation with
Silica opening agent and PPA auxiliary agent can improve the finish on polyethylene film surface and the uniformity of material, make poly- second
Alkene film have the high grade of transparency, thus reach can improve in print effect the advantages of.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of printing is compound to use polyethylene film, including internal layer, middle layer and outer layer；The internal layer includes LDPE, m-
VLDPE, m-LLDPE, opening agent and PPA auxiliary agent, the weight of LDPE, m-VLDPE, m-LLDPE, opening agent and PPA auxiliary agent
Than for (35-45): (25-35): (25-35): (2-4): (0.5-1)；The melt index of LDPE is 1.9g/ in the internal layer
10min, density 0.924g/cm3, the melt index of m-VLDPE is 2.0g/10min, density 0.918g/cm3, m-LLDPE
Melt index be 1.0g/10min, density 0.918g/cm3；The middle layer includes LDPE, m-LLDPE and PPA auxiliary agent,
The weight ratio of LDPE, m-LLDPE and PPA auxiliary agent is (40-50): (50-60): (0.5-1.5)；LDPE's is molten in the middle layer
Melting index is 1.9g/10min, density 0.924g/cm3, the melt index of m-LLDPE is 1.0g/10min, and density is
0.918g/cm3；The outer layer includes LDPE, m-VLDPE, m-LLDPE and PPA auxiliary agent, LDPE, m-VLDPE, m-LLDPE with
And the weight ratio of PPA auxiliary agent is (15-25): (35-45): (35-45): (1-2)；The melt index of LDPE is in the outer layer
1.9g/10min density 0.924g/cm3, the melt index of m-VLDPE is 2.0g/10min, density 0.918g/cm3, m-
The melt index of LLDPE is 1.0g/10min, density 0.918g/cm3。
By using above-mentioned technical proposal, with the with fastest developing speed and more mature of m-PE, principal item in metallocene-polyolefin
For metallocene linear low density polyethylene (m-LLDPE) and metallocene ultra-low density polyethylene (m-VLDPE), m-PE has than usual
Ziegler-Natta catalyst production the higher molecular structure regularity of PE, thus have higher crystallinity, intensity is high,
Good toughness, rigidity are good；M-PE is better than the transparency of common PE, though crystallinity is high, the transparency, and also resin cleannes are high；
The stress cracking resistance of m-PE resin is excellent, can be more than 1000h, and the proof stress modifying agent for being commonly used as other polyolefin uses.
PPA auxiliary agent (fluoropolymer additive) is the Polymer Processing by fluoro containing polymers polymer for basic structure
Auxiliary agent is widely used in polyethylene (including LLDPE, m-LLDPE, MDPE, HDPE, HMW-HDPE, LDPE, VLDPE), ethylene-
Vinylacetate (EVA), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), nylon (PA), polyester (PET) and
The processing of the plastics such as polycarbonate (PC).PPA can improve product surface quality, improve surface gloss；Eliminate accumulation in mouth model；Drop
Low melt rupture, reduces rupture of membranes phenomenon；Improve the processing performance of resin.Opening agent is usually used in the production of plastic film material products
In preparation, the opening performance of film can be effectively improved.
The 2420H, melt index 1.9g/ that LDPE in raw material preferably uses National Petroleum of Thailand company to produce
10min, density 0.924g/cm3, slipping agent is not added, is conducive to the adsorption capacity for improving ink, the high grade of transparency, low haze have
Conducive to the transparency for improving polyethylene film, to print effect in improving；M-VLDPE preferably uses Exxon Mobil Corporation to produce
2018HA, melt index 2.0g/10min, density 0.918g/cm3, slipping agent is not added, is conducive to improve ink
Adsorption capacity, the high grade of transparency, low haze, be conducive to improve polyethylene film transparency, thus improve in print effect；m-
The melt index for the 1018HA that LLDPE preferably uses Exxon Mobil Corporation to produce is 1.0g/10min, density 0.918g/
cm3, slipping agent is not added, the adsorption capacity for improving ink is conducive to, the high grade of transparency, low haze are conducive to improve polyethylene film
Transparency, thus improve in print effect.
The present invention is further arranged to: including internal layer, middle layer and outer layer；The internal layer includes LDPE, m-VLDPE, m-
LLDPE, opening agent and PPA auxiliary agent, LDPE, m-VLDPE, m-LLDPE, opening agent and PPA auxiliary agent weight ratio be 40:
30:30:3:1；The melt index of LDPE is 1.9g/10min, density 0.924g/cm in the internal layer3, the melting of m-VLDPE
Index is 2.0g/10min, density 0.918g/cm3, the melt index of m-LLDPE is 1.0g/10min, density 0.918g/
cm3；The middle layer includes LDPE, m-LLDPE and PPA auxiliary agent, and the weight ratio of LDPE, m-LLDPE and PPA auxiliary agent is 40:
60:1；The melt index of LDPE is 1.9g/10min, density 0.924g/cm3, the melt index of m-LLDPE is 1.0g/
10min, density 0.918g/cm3；The outer layer includes LDPE, m-VLDPE, m-LLDPE and PPA auxiliary agent, LDPE, m-
The weight ratio of VLDPE, m-LLDPE and PPA auxiliary agent is 20:40:40:1.4；The melt index of LDPE is in the outer layer
1.9g/10min density 0.924g/cm3, the melt index of m-VLDPE is 2.0g/10min, density 0.918g/cm3, m-
The melt index of LLDPE is 1.0g/10min, density 0.918g/cm3。
By using above-mentioned technical proposal, the transparency of the polyethylene film prepared under optimum ratio is high, inner print effect
It is good, cooperate the uniform of the finish and material that can improve polyethylene film surface with silica opening agent and PPA auxiliary agent
Property, be conducive to improve processing performance, to improve the quality of polyethylene film.
The present invention is further arranged to: the layer thickness ratio of the internal layer, middle layer and outer layer is 3:4:3.
By using above-mentioned technical proposal, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3, is conducive to three layers
Coextrusion blow improves the intensity, transparency and heat sealability of polyethylene film.
The present invention is further arranged to: polyethylene film with a thickness of 60-100 μm.
By using above-mentioned technical proposal, polyethylene film with a thickness of 60-100 μm, convenient for the print to polyethylene film
Brush, and can guarantee the intensity of polyethylene film.
The present invention is further arranged to: the opening agent is silica opening agent.
By using above-mentioned technical proposal, it is one that silica opening agent, which is a kind of artificial synthesized amorphous silica,
The efficient antiblocking agent of kind, anticaking agent, opening agent, are used as the efficient opening agent of polyethylene ldpe film.Synthetic silica is opened
Mouthful agent comparison natural openings agent effectively, there is better optics degree, be it is amorphous, have higher bulk density, it is lower
Opening back-up needs, dispersion is easier, lower fugitive dust, better masterbatch processability；Silica opening agent is without any
Silicon crystal not will form " silicosis ", and quiet/kinetic force of friction reducing effect is obvious, and silica opening agent is added in the film to mist
The phenomenon that influence for spending rising is very small, and transparency is high, effectively improves " end xanthochromia ".
The present invention is further arranged to: the partial size of silica opening agent is 4-5 μm.
By using above-mentioned technical proposal, the size controlling of silica opening agent is being 4-5 μm, can make silica
Opening agent is preferably mixed with resin.
The second object of the present invention, which is to improve, a kind of prints the compound preparation method with polyethylene film.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of preparation method for printing the compound preparation method with polyethylene film, includes the following steps:
(1) ingredient: internal layer raw material, middle layer raw material and outer layer raw material are proportionally prepared for use；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material being placed in three-layer co-extruded blown film unit, to three layers
Coextrusion film blowing unit carries out subregion continuous warming, and the set temperature of internal layer host, middle layer host and outer layer host is 170-200
DEG C, the set temperature of die head is 220-230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is obtained for two panels respectively at the friction winding of both sides rubber roller
It prints and compound uses polyethylene film.
By using above-mentioned technical proposal, internal layer raw material, middle layer raw material and internal layer raw material are passed through into three-layer co-extruded blow molding
Machine obtains, by the mutual cooperation of LDPE, m-VLDPE, m-LLDPE, opening agent and PAA, strict control host temperature, and
Strict control cooling temperature can prepare the polyethylene film printed in the high grade of transparency is suitble to.
The present invention is further arranged to: in the step (2) when booting host booting order be respectively outer layer, it is middle layer, interior
Layer, available machine time interval 2-4min.
By using above-mentioned technical proposal, due to the temperature of a little higher than middle layer host of the host temperature of outer layer, and middle layer master
The temperature of a little higher than internal layer host of the temperature of machine, therefore when driving into need successively to open the host of outer layer, middle layer, internal layer, have
Conducive to the processing performance for improving product.
The present invention is further arranged to: one area of internal layer host in the step (2), 2nd area, 3rd area, 4th area, 5th area and
The set temperature in 6th area is respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C and 200 DEG C；
One area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200 DEG C,
200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C；
One area of outer layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 182 DEG C, 200 DEG C,
205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C；
One area of die head, 2nd area, 3rd area, 4th area and 5th area set temperature be 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C with
And 230 DEG C.
By using above-mentioned technical proposal, at a set temperature, is conducive to the flatness for improving polyethylene film, prevents thin
Film deformation, the polyethylene of internal layer, middle layer and outer layer can preferably be combined with each other.
The present invention is further arranged to: the initial temperature of three-layer co-extruded blown film unit is set as 50 DEG C in the step (2),
It is heated up with the speed of 10-15 DEG C/10min.
By using above-mentioned technical proposal, the initial temperature of three-layer co-extruded blown film unit is set as 50 DEG C, makes inflation film manufacturing machine
It can be fully warmed-up, then be heated up with the speed of 10-15 DEG C/10min, be conducive to make inflation film manufacturing machine thermally equivalent, be conducive to improve
The uniformity of polyethylene film improves its tensile strength.
In conclusion the present invention has the advantages that compared with the prior art
1. LDPE, m-VLDPE and m-LLDPE for selecting do not contain slipping agent, be conducive to the adsorption capacity for improving ink,
Improve printing effect；LDPE, m-VLDPE and m-LLDPE are the resins of the high grade of transparency, low haze, and it is thin to can be improved polyethylene
The transparency of film prints effect in raising；
2. opening agent uses silica opening agent, partial size is 4-5 μm, transparent due to silica opening agent itself
The phenomenon that degree is high, and the influence to mist degree rising is very small, can be effectively improved " end xanthochromia "；
3. a pair three-layer co-extruded blown film unit carries out subregion continuous warming, internal layer host, middle layer host and outer layer host
Set temperature is 170-200 DEG C, and the set temperature of die head is 220-230 DEG C, and keeping temperature while cooling is 20 ± 2 DEG C,
The compound of three-layer polyethylene can be improved in strict temperature control, effectively improves the transparency of polyethylene film；And utilize poly- second
The excellent heat seal strength of alkene film can guarantee it is compound after double-layer polyethylene printing compound film will not be separated from each other.
Specific embodiment
Invention is further described in detail below.
One, embodiment 1-6
Embodiment 1: a kind of printing is compound to be prepared with the following method with polyethylene film:
(1) ingredient: A: internal layer raw material include 40kg melt index be 1.9g/10min, density 0.924g/cm3's
LDPE, 30kg melt index is 2.0g/10min, density 0.918g/cm3M-VLDPE, 30kg melt index be 1.0g/
10min, density 0.918g/cm3M-LLDPE, 3kg partial size is 4-5 μm of silica opening agent and 1kgPPA auxiliary agent；
B: middle layer raw material include 40kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 60kg is molten
Melt index be 1.0g/10min, density 0.918g/cm3M-LLDPE and 1kgPPA auxiliary agent；
C: outer layer raw material include 20kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 40kg is molten
Melt index be 2.0g/10min, density 0.918g/cm3M-VLDPE, 40kg melt index is 1.0g/10min, density is
0.918g/cm3M-LLDPE and 1.4kgPPA auxiliary agent；
Wherein, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3；
The 2420H that LDPE in raw material preferably uses National Petroleum of Thailand company to produce；M-VLDPE preferably uses Exxon
The 2018HA of Mobil Corporation production；The 1018HA that m-LLDPE preferably uses Exxon Mobil Corporation to produce；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material is placed in three-layer co-extruded blown film unit, when booting
Host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 4min, the initial temperature of three-layer co-extruded blown film unit
It is set as 50 DEG C, the subregion continuous warming that heated up with the speed of 15 DEG C/10min, internal layer host is carried out to three-layer co-extruded blown film unit
One area, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C
And 200 DEG C, one area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200
DEG C, 200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C, the setting in outer layer host one area, 2nd area, 3rd area, 4th area, 5th area and 6th area
Temperature is respectively 182 DEG C, 200 DEG C, 205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C, one area of die head, 2nd area, 3rd area, 4th area and
The set temperature in 5th area is 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is wound for two panels respectively at the friction of both sides rubber roller, is printed
Brush it is compound with polyethylene film, the polyethylene film with a thickness of 80 μm.
Embodiment 2: a kind of printing is compound to be prepared with the following method with polyethylene film:
(1) ingredient: A: internal layer raw material include 35kg melt index be 1.9g/10min, density 0.924g/cm3's
LDPE, 35kg melt index is 2.0g/10min, density 0.918g/cm3M-VLDPE, 30kg melt index be 1.0g/
10min, density 0.918g/cm3M-LLDPE, 2kg partial size be 4-5 μm silica opening agent and 0.5kgPPA help
Agent；
B: middle layer raw material include 45kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 55kg is molten
Melt index be 1.0g/10min, density 0.918g/cm3M-LLDPE and 0.5kgPPA auxiliary agent；
C: outer layer raw material include 15kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 40kg is molten
Melt index be 2.0g/10min, density 0.918g/cm3M-VLDPE, 45kg melt index is 1.0g/10min, density is
0.918g/cm3M-LLDPE and 1kgPPA auxiliary agent；
Wherein, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3；
The 2420H that LDPE in raw material preferably uses National Petroleum of Thailand company to produce；M-VLDPE preferably uses Exxon
The 2018HA of Mobil Corporation production；The 1018HA that m-LLDPE preferably uses Exxon Mobil Corporation to produce；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material is placed in three-layer co-extruded blown film unit, when booting
Host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 2min, the initial temperature of three-layer co-extruded blown film unit
It is set as 50 DEG C, the subregion continuous warming that heated up with the speed of 10 DEG C/10min, internal layer host is carried out to three-layer co-extruded blown film unit
One area, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C
And 200 DEG C, one area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200
DEG C, 200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C, the setting in outer layer host one area, 2nd area, 3rd area, 4th area, 5th area and 6th area
Temperature is respectively 182 DEG C, 200 DEG C, 205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C, one area of die head, 2nd area, 3rd area, 4th area and
The set temperature in 5th area is 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is wound for two panels respectively at the friction of both sides rubber roller, is printed
Brush it is compound with polyethylene film, the polyethylene film with a thickness of 60 μm.
Embodiment 3: a kind of printing is compound to be prepared with the following method with polyethylene film:
(1) ingredient: A: internal layer raw material include 45kg melt index be 1.9g/10min, density 0.924g/cm3's
LDPE, 30kg melt index is 2.0g/10min, density 0.918g/cm3M-VLDPE, 25kg melt index be 1.0g/
10min, density 0.918g/cm3M-LLDPE, 4kg partial size is 4-5 μm of silica opening agent and 1kgPPA auxiliary agent；
B: middle layer raw material include 50kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 50kg is molten
Melt index be 1.0g/10min, density 0.918g/cm3M-LLDPE and 1kgPPA auxiliary agent；
C: outer layer raw material include 25kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 35kg is molten
Melt index be 2.0g/10min, density 0.918g/cm3M-VLDPE, 40kg melt index is 1.0g/10min, density is
0.918g/cm3M-LLDPE and 2kgPPA auxiliary agent；
Wherein, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3；
The 2420H that LDPE in raw material preferably uses National Petroleum of Thailand company to produce；M-VLDPE preferably uses Exxon
The 2018HA of Mobil Corporation production；The 1018HA that m-LLDPE preferably uses Exxon Mobil Corporation to produce；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material is placed in three-layer co-extruded blown film unit, when booting
Host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 3min, the initial temperature of three-layer co-extruded blown film unit
It is set as 50 DEG C, the subregion continuous warming that heated up with the speed of 13 DEG C/10min, internal layer host is carried out to three-layer co-extruded blown film unit
One area, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C
And 200 DEG C, one area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200
DEG C, 200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C, the setting in outer layer host one area, 2nd area, 3rd area, 4th area, 5th area and 6th area
Temperature is respectively 182 DEG C, 200 DEG C, 205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C, one area of die head, 2nd area, 3rd area, 4th area and
The set temperature in 5th area is 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is wound for two panels respectively at the friction of both sides rubber roller, is printed
Brush it is compound with polyethylene film, the polyethylene film with a thickness of 100 μm.
Embodiment 4: a kind of printing is compound to be prepared with the following method with polyethylene film:
(1) ingredient: A: internal layer raw material include 40kg melt index be 1.9g/10min, density 0.924g/cm3's
LDPE, 35kg melt index is 2.0g/10min, density 0.918g/cm3M-VLDPE, 25kg melt index be 1.0g/
10min, density 0.918g/cm3M-LLDPE, 3kg partial size is 4-5 μm of silica opening agent and 1kgPPA auxiliary agent；
B: middle layer raw material include 48kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 52kg is molten
Melt index be 1.0g/10min, density 0.918g/cm3M-LLDPE and 0.5kgPPA auxiliary agent；
C: outer layer raw material include 20kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 45kg is molten
Melt index be 2.0g/10min, density 0.918g/cm3M-VLDPE, 35kg melt index is 1.0g/10min, density is
0.918g/cm3M-LLDPE and 1.4kgPPA auxiliary agent；
Wherein, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3；
The 2420H that LDPE in raw material preferably uses National Petroleum of Thailand company to produce；M-VLDPE preferably uses Exxon
The 2018HA of Mobil Corporation production；The 1018HA that m-LLDPE preferably uses Exxon Mobil Corporation to produce；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material is placed in three-layer co-extruded blown film unit, when booting
Host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 2min, the initial temperature of three-layer co-extruded blown film unit
It is set as 50 DEG C, the subregion continuous warming that heated up with the speed of 12 DEG C/10min, internal layer host is carried out to three-layer co-extruded blown film unit
One area, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C
And 200 DEG C, one area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200
DEG C, 200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C, the setting in outer layer host one area, 2nd area, 3rd area, 4th area, 5th area and 6th area
Temperature is respectively 182 DEG C, 200 DEG C, 205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C, one area of die head, 2nd area, 3rd area, 4th area and
The set temperature in 5th area is 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is wound for two panels respectively at the friction of both sides rubber roller, is printed
Brush it is compound with polyethylene film, the polyethylene film with a thickness of 90 μm.
Embodiment 5: a kind of printing is compound to be prepared with the following method with polyethylene film:
(1) ingredient: A: internal layer raw material include 35kg melt index be 1.9g/10min, density 0.924g/cm3's
LDPE, 35kg melt index is 2.0g/10min, density 0.918g/cm3M-VLDPE, 30kg melt index be 1.0g/
10min, density 0.918g/cm3M-LLDPE, 2kg partial size be 4-5 μm silica opening agent and 0.5kgPPA help
Agent；
B: middle layer raw material include 50kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 50kg is molten
Melt index be 1.0g/10min, density 0.918g/cm3M-LLDPE and 1kgPPA auxiliary agent；
C: outer layer raw material include 20kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 40kg is molten
Melt index be 2.0g/10min, density 0.918g/cm3M-VLDPE, 40kg melt index is 1.0g/10min, density is
0.918g/cm3M-LLDPE and 1.4kgPPA auxiliary agent；
Wherein, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3；
The 2420H that LDPE in raw material preferably uses National Petroleum of Thailand company to produce；M-VLDPE preferably uses Exxon
The 2018HA of Mobil Corporation production；The 1018HA that m-LLDPE preferably uses Exxon Mobil Corporation to produce；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material is placed in three-layer co-extruded blown film unit, when booting
Host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 4min, the initial temperature of three-layer co-extruded blown film unit
It is set as 50 DEG C, the subregion continuous warming that heated up with the speed of 14 DEG C/10min, internal layer host is carried out to three-layer co-extruded blown film unit
One area, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C
And 200 DEG C, one area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200
DEG C, 200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C, the setting in outer layer host one area, 2nd area, 3rd area, 4th area, 5th area and 6th area
Temperature is respectively 182 DEG C, 200 DEG C, 205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C, one area of die head, 2nd area, 3rd area, 4th area and
The set temperature in 5th area is 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is wound for two panels respectively at the friction of both sides rubber roller, is printed
Brush it is compound with polyethylene film, the polyethylene film with a thickness of 80 μm.
Embodiment 6: a kind of printing is compound to be prepared with the following method with polyethylene film:
(1) ingredient: A: internal layer raw material include 45kg melt index be 1.9g/10min, density 0.924g/cm3's
LDPE, 25kg melt index is 2.0g/10min, density 0.918g/cm3M-VLDPE, 30kg melt index be 1.0g/
10min, density 0.918g/cm3M-LLDPE, 3.5kg partial size is 4-5 μm of silica opening agent and 0.5kgPPA
Auxiliary agent；
B: middle layer raw material include 43kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 57kg is molten
Melt index be 1.0g/10min, density 0.918g/cm3M-LLDPE and 0.5kgPPA auxiliary agent；
C: outer layer raw material include 20kg melt index be 1.9g/10min, density 0.924g/cm3LDPE, 45kg is molten
Melt index be 2.0g/10min, density 0.918g/cm3M-VLDPE, 35kg melt index is 1.0g/10min, density is
0.918g/cm3M-LLDPE and 1kgPPA auxiliary agent；
Wherein, the layer thickness ratio of internal layer, middle layer and outer layer is 3:4:3；
The 2420H that LDPE in raw material preferably uses National Petroleum of Thailand company to produce；M-VLDPE preferably uses Exxon
The 2018HA of Mobil Corporation production；The 1018HA that m-LLDPE preferably uses Exxon Mobil Corporation to produce；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material is placed in three-layer co-extruded blown film unit, when booting
Host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 2min, the initial temperature of three-layer co-extruded blown film unit
It is set as 50 DEG C, the subregion continuous warming that heated up with the speed of 11 DEG C/10min, internal layer host is carried out to three-layer co-extruded blown film unit
One area, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195 DEG C, 195 DEG C, 170 DEG C
And 200 DEG C, one area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200
DEG C, 200 DEG C, 200 DEG C, 170 DEG C and 200 DEG C, the setting in outer layer host one area, 2nd area, 3rd area, 4th area, 5th area and 6th area
Temperature is respectively 182 DEG C, 200 DEG C, 205 DEG C, 205 DEG C, 170 DEG C and 200 DEG C, one area of die head, 2nd area, 3rd area, 4th area and
The set temperature in 5th area is 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up
Ensure to stick around mouth mold die lip without melten gel and impurity when melten gel, melten gel is mediated rapidly after causing, and is filled in die head inflating port
Compressed air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is wound for two panels respectively at the friction of both sides rubber roller, is printed
Brush it is compound with polyethylene film, the polyethylene film with a thickness of 70 μm.
The proportion of each raw material in 1 embodiment 1-6 of table
Two, comparative example 1-6
Comparative example 1: using the Chinese patent of Authorization Notice No. CN102179985B, it discloses a kind of polyethylene film and
Preparation method, polyethylene film successively include: composite layer, middle layer and hot sealing layer；Composite layer includes: 25wt%-40wt%
Low density polyethylene (LDPE), 25wt%-40wt% linear low density polyethylene and 33wt%-45wt% modified metallocene it is linear
Low density polyethylene (LDPE)；The middle layer include: 25wt%-50wt% low density polyethylene (LDPE) and 50wt%-75wt% it is linearly low
Density polyethylene；Hot sealing layer includes: the low density polyethylene (LDPE) of 28wt%-35wt% and the linea low density of 65wt%-72wt%
Polyethylene.
Comparative example 2: using Authorization Notice No. for the Chinese patent of CN104924712B, and it discloses self-standing bags and its compound
Film, a kind of polyethylene film comprising composite layer, middle layer and the hot sealing layer successively overlapped, composite layer include: 60wt%-
The metallocene PE of 70wt% and the low density polyethylene (LDPE) of 30wt%-40wt%；Middle layer includes: 30wt%-35wt%'s
The low density polyethylene (LDPE) of high density polyethylene (HDPE), the linear low density polyethylene of 30wt%-35wt% and 30wt%-35wt%；Heat
Sealing includes: enhancing polyvinyl resin, the 0.5wt%- of the low density polyethylene (LDPE) of 33wt%-35wt%, 63wt%-65wt%
The slipping agent of 0.8wt% and the opening agent of 1.3wt%-2.0wt%；The fusing point of composite layer is higher than the fusing point of middle layer, middle layer
Fusing point be higher than hot sealing layer fusing point.
Comparative example 3: comparative example 3 is difference from example 1 is that resin used contains slipping agent in raw material.
Comparative example 4: comparative example 4 is three-layer co-extruded to blow difference from example 1 is that in polyethylene film preparation method
Host temperature when film machine is blow molded raw material is 140-170 DEG C, and die head temperature is 160-180 DEG C.
Comparative example 5: comparative example 5 difference from example 1 is that in polyethylene film preparation method, enter the wind by when blow molding
Temperature is 25 DEG C.
Comparative example 6: comparative example 6 difference from example 1 is that in polyethylene film preparation method, enter the wind by when blow molding
Temperature is 15 DEG C.
Three, application examples
Application examples: stamping text with polyethylene ink special for the outer layer of polyethylene film prepared by embodiment 1, then to
Be printed on text side it is compound on another layer of polyethylene film being prepared by embodiment 1, it is compound to obtain double-layer polyethylene printing
Film.
Four, the performance of the polyethylene film of embodiment 1-6, comparative example 1-6 and application examples preparation is tested.
1, critical surface tension measures: according to GB/T14216-2008 " plastic foil and piece wetting tension test method " to reality
The polyethylene film applied in a 1-6 and comparative example 1-3 is tested, and test result is shown in table 2:
The performance test table of the polyethylene film of table 2 embodiment 1-6 and comparative example 1-3 preparation
As can be seen from the above data, the critical surface tension of common polythene only has 31mN/m, and critical surface tension
Print request can just be met by needing to reach 38mN/m, and the critical surfaces of polyethylene film are tensioned >=38mN/m in embodiment 1-6,
Illustrate that it is preferable to the adhesive force of ink, and the critical surface tension in comparative example 1-3 it is obvious < 38mN/m, illustrate the polyethylene
Film does not meet print request.
2, optical property detects: since polyethylene film prepared by the present invention is the print film compound for inner print,
In order to make it is compound after double-layer polyethylene printing compound film (application examples) text it is clear, it is necessary to guarantee that polyethylene film has
Good optical property, it is therefore desirable to the optical property of polyethylene film is detected, it is " transparent according to GB/T2410-2008
The measurement of plastic light-transmission rate and mist degree " to embodiment 1-6, comparative example 1-2, comparative example 4-6 preparation polyethylene film light transmission
Rate and mist degree are detected, and be will test result and are shown in table 3.
The optical property of polyethylene film prepared by 3 embodiment 1-6 of table, comparative example 1-2, comparative example 4-6 detects table
Light transmittance is bigger, and mist degree is smaller, then transparency is better；The optical property of the film of different-thickness is also different, thickness
Bigger, light transmittance is smaller, and mist degree is bigger, and transparency is lower；As can be seen from the above data, polyethylene film prepared by the present invention
Light transmittance>=94%, and mist degree<10, illustrate polyethylene film prepared by the present invention have good optical property；And
The optical property of the polyethylene film of comparative example 1-3 preparation is slightly worse, is not suitable for doing inner print film use；To crowded in comparative example 4-6
The temperature and cooling temperature being blow molded out change, but compared to embodiment 1, light transmittance decline, mist degree increase, explanation
The change of temperature will affect the transparency of polyethylene film, therefore the polyethylene only prepared at a temperature of the present invention is set is thin
The transparency of film is best.
3, mechanics properties testing: the mechanical property of the embodiment 1-6 and comparative example 1-2 polyethylene film prepared is carried out
Detection, detection project accepted standard are as follows: tensile strength is " the stretched plastic film performance test side GB/T13022-1991
Method ", elongation at break is GB/T13022-1991 " stretched plastic film performance test methods ", tearing strength GB/
T16578.1-2008 " the measurement part 1 of plastic film and thin slice tearing-resistant performance: trousers shape method of Tearing ", heat seal strength QB/
T2358-1998 " plastic film packaging bag heat sealing strength test method "；It will test result and be shown in table 4.
The mechanics properties testing table of the polyethylene film of table 4 embodiment 1-6 and comparative example 1-2 preparation
As can be seen from the above data, the tensile strength of polyethylene film prepared by the present invention, elongation at break and tearing
Resistance to spalling is slightly above traditional polyethylene film, illustrates that polyethylene film prepared by the present invention has good mechanical property, and
Heat seal strength remains basically stable with traditional polyethylene film, illustrates that polyethylene film prepared by the present invention has good heat sealability
Energy；Therefore the present invention prepares volume polyethylene film suitable for heat sealing packaging material.
In conclusion the critical surface tension of common polythene only has 31mN/m, and illustrate printing loosely lower than 38mN/m,
It needs to carry out sided corona treatment, but with the extension of corona time, will lead to the heat sealability decline of polyethylene film, therefore in original
The resin for being free of slipping agent is selected in the selection of material, can be enhanced polyethylene film to the adsorption capacity of ink, be reduced sided corona treatment
Time；Then by the way of inner print, clamping by two layers of polyethylene film to printing word can play that reduce ink de-
The phenomenon that falling plays the role of improving printing effect from another point of view；In the utilization that prints to need to make polyethylene film to have fine
Transparency to guarantee legibility, and to have excellent heat seal strength, to guarantee that double-layer polyethylene printing compound film will not
It is separated from each other, therefore polyethylene film prepared by the present invention has the good comprehensive performance of compound above-mentioned requirements.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of printing is compound to use polyethylene film, it is characterised in that: including internal layer, middle layer and outer layer；
The internal layer includes LDPE, m-VLDPE, m-LLDPE, opening agent and PPA auxiliary agent, LDPE, m-VLDPE, m-LLDPE,
The weight ratio of opening agent and PPA auxiliary agent is (35-45): (25-35): (25-35): (2-4): (0.5-1)；In the internal layer
The melt index of LDPE is 1.9g/10min, and the melt index of density 0.924g/cm3, m-VLDPE are 2.0g/10min, close
Degree is 0.918g/cm3, and the melt index of m-LLDPE is 1.0g/10min, density 0.918g/cm3；
The middle layer includes LDPE, m-LLDPE and PPA auxiliary agent, and the weight ratio of LDPE, m-LLDPE and PPA auxiliary agent is (40-
50): (50-60): (0.5-1.5)；In the middle layer melt index of LDPE be 1.9g/10min, density 0.924g/cm3,
The melt index of m-LLDPE is 1.0g/10min, density 0.918g/cm3；
The outer layer includes LDPE, m-VLDPE, m-LLDPE and PPA auxiliary agent, and LDPE, m-VLDPE, m-LLDPE and PPA are helped
The weight ratio of agent is (15-25): (35-45): (35-45): (1-2)；The melt index of LDPE is 1.9g/ in the outer layer
The melt index of 10min, density 0.924g/cm3, m-VLDPE are 2.0g/10min, density 0.918g/cm3, m-LLDPE
Melt index be 1.0g/10min, density 0.918g/cm3；
Slipping agent is not added in LDPE, m-VLDPE and m-LLDPE.
2. printing according to claim 1 is compound to use polyethylene film, it is characterised in that: including internal layer, middle layer and outer
Layer；
The internal layer includes LDPE, m-VLDPE, m-LLDPE, opening agent and PPA auxiliary agent, LDPE, m-VLDPE, m-LLDPE,
The weight ratio of opening agent and PPA auxiliary agent is 40:30:30:3:1；The melt index of LDPE is 1.9g/10min in the internal layer,
Density is 0.924g/cm3, and the melt index of m-VLDPE is 2.0g/10min, the melting of density 0.918g/cm3, m-LLDPE
Index is 1.0g/10min, density 0.918g/cm3；
The middle layer includes LDPE, m-LLDPE and PPA auxiliary agent, and the weight ratio of LDPE, m-LLDPE and PPA auxiliary agent is 40:
60:1；The melt index of LDPE is 1.9g/10min, and the melt index of density 0.924g/cm3, m-LLDPE are 1.0g/
10min, density 0.918g/cm3；
The outer layer includes LDPE, m-VLDPE, m-LLDPE and PPA auxiliary agent, and LDPE, m-VLDPE, m-LLDPE and PPA are helped
The weight ratio of agent is 20:40:40:1.4；The melt index of LDPE is 1.9g/10min, density 0.924g/cm in the outer layer
3, m-VLDPE melt index is 2.0g/10min, and the melt index of density 0.918g/cm3, m-LLDPE are 1.0g/
10min, density 0.918g/cm3.
3. printing according to any one of claims 1 or 2 is compound to use polyethylene film, it is characterised in that: the internal layer,
The layer thickness of middle layer and outer layer ratio is 3:4:3.
4. printing according to any one of claims 1 or 2 is compound to use polyethylene film, it is characterised in that: polyethylene is thin
Film with a thickness of 60-100 μm.
5. printing according to any one of claims 1 or 2 is compound to use polyethylene film, it is characterised in that: the opening
Agent is silica opening agent.
6. printing according to claim 5 is compound to use polyethylene film, it is characterised in that: the partial size of silica opening agent
It is 4-5 μm.
7. a kind of print the compound preparation method with polyethylene film, it is characterised in that: the following steps are included:
(1) ingredient: internal layer raw material, middle layer raw material and outer layer raw material are proportionally prepared for use；
(2) it heats up: internal layer raw material, middle layer raw material and outer layer raw material being placed in three-layer co-extruded blown film unit, to three-layer co-extruded
Blown film unit carries out subregion continuous warming, and the set temperature of internal layer host, middle layer host and outer layer host is 170-200 DEG C,
The set temperature of die head is 220-230 DEG C；
(3) be blow molded: air-cooler in opening, keeping inlet air temperature is 20 ± 2 DEG C, and blower frequency is 40-50HZ, is pulled up melten gel
When ensure to stick around mouth mold die lip without melten gel and impurity, melten gel is mediated rapidly after causing, and is filled with compression in die head inflating port
Air, and with traction rope by film bubble at the uniform velocity pull-up；
(4) it winds: after so that film bubble is entered upper traction clamp roll, entering corona machine through each deflector roll, enter winding subsidiary engine later；
(5) it cuts: the film bubble entered in winding subsidiary engine being cut and is printed for two panels respectively at the friction winding of both sides rubber roller
It is compound to use polyethylene film.
8. the compound preparation method with polyethylene film of printing according to claim 7, it is characterised in that: the step
(2) host booting order is respectively outer layer, middle layer, internal layer, available machine time interval 2-4min when booting in.
9. the compound preparation method with polyethylene film of printing according to claim 7, it is characterised in that: the step
(2) one area of internal layer host in, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 178 DEG C, 195 DEG C, 195
DEG C, 195 DEG C, 170 DEG C and 200 DEG C；
One area of middle layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 180 DEG C, 200 DEG C, 200
DEG C, 200 DEG C, 170 DEG C and 200 DEG C；
One area of outer layer host, 2nd area, 3rd area, 4th area, 5th area and 6th area set temperature be respectively 182 DEG C, 200 DEG C, 205
DEG C, 205 DEG C, 170 DEG C and 200 DEG C；
One area of die head, 2nd area, 3rd area, 4th area and 5th area set temperature be 220 DEG C, 220 DEG C, 220 DEG C, 220 DEG C and 230
℃。
10. the compound preparation method with polyethylene film of printing according to claim 7, it is characterised in that: the step
(2) initial temperature of three-layer co-extruded blown film unit is set as 50 DEG C in, is heated up with the speed of 10-15 DEG C/10min.
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|---|---|---|---|---|
| CN110002102B (en) * | 2019-05-27 | 2020-10-30 | 安徽金科印务有限责任公司 | Manufacturing method of PE composite packaging film and application of product |
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| CN117183520B (en) * | 2023-09-11 | 2024-04-09 | 珠海嘉雄包装材料有限公司 | Co-extrusion stretch film for packaging and preparation process thereof |
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| CN105175849A (en) * | 2015-08-10 | 2015-12-23 | 淄博华致林包装制品有限公司 | Plastic packaging material for injection powder and preparation process thereof |
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| CN105175849A (en) * | 2015-08-10 | 2015-12-23 | 淄博华致林包装制品有限公司 | Plastic packaging material for injection powder and preparation process thereof |
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