CN107283976B - A kind of microporous polyethylene breathable films and preparation method thereof - Google Patents
A kind of microporous polyethylene breathable films and preparation method thereof Download PDFInfo
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- CN107283976B CN107283976B CN201710527579.0A CN201710527579A CN107283976B CN 107283976 B CN107283976 B CN 107283976B CN 201710527579 A CN201710527579 A CN 201710527579A CN 107283976 B CN107283976 B CN 107283976B
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- polyethylene
- low density
- metallocene linear
- density polyethylene
- breathable films
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- 239000004698 Polyethylene Substances 0.000 title claims abstract description 62
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 60
- -1 polyethylene Polymers 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 45
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 claims abstract description 39
- 238000007639 printing Methods 0.000 claims abstract description 27
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000011737 fluorine Substances 0.000 claims abstract description 16
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 15
- 238000000071 blow moulding Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000008188 pellet Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000010096 film blowing Methods 0.000 claims description 5
- 239000000155 melt Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 2
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 2
- NVKDFGCILHNHRS-UHFFFAOYSA-N C1(C=CC=C1)[Au] Chemical compound C1(C=CC=C1)[Au] NVKDFGCILHNHRS-UHFFFAOYSA-N 0.000 claims 1
- 239000012752 auxiliary agent Substances 0.000 claims 1
- PLXMOAALOJOTIY-FPTXNFDTSA-N Aesculin Natural products OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@H](O)[C@H]1Oc2cc3C=CC(=O)Oc3cc2O PLXMOAALOJOTIY-FPTXNFDTSA-N 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000004587 chromatography analysis Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000002706 hydrostatic effect Effects 0.000 abstract description 2
- 239000000088 plastic resin Substances 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 64
- 238000010345 tape casting Methods 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 5
- 238000007766 curtain coating Methods 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012982 microporous membrane Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 206010021639 Incontinence Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- ZSWFCLXCOIISFI-UHFFFAOYSA-N endo-cyclopentadiene Natural products C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000002700 urine Anatomy 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
-
- 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
- B32B2307/54—Yield strength; Tensile strength
-
- 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
- B32B2307/546—Flexural strength; Flexion stiffness
-
- 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
- B32B2307/724—Permeability to gases, adsorption
-
- 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
- B32B2307/726—Permeability to liquids, absorption
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of microporous polyethylene breathable films and preparation method thereof.Film of the present invention is obtained by coextrusion blow molding, including printing layer, middle layer and hot sealing layer, printing layer, middle layer and hot sealing layer are made of calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid, the mass ratio of calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid is (65~75): (25~35): (0.5~1.5), and the partial size of calcium carbonate is 1~2 μm.Polyethylene micropore breathable films of the present invention all have clear superiority in indexs such as pull-off force, hydrostatic pressing, moisture-vapor transmissions, this cuts for the positioning of corresponding product, polychrome printing chromatography provides excellent technique guarantee.The grammes per square metre of polyethylene micropore breathable films unit area of the present invention is smaller, can use plastic resin in this way with minimizing, substantial saved energy consumption, and reduce carbon emission, for disposable living-hygienic articles are light, emission reduction provides guarantee.
Description
Technical field
The invention belongs to thin film materials art, it is specifically related to a kind of microporous polyethylene breathable films and preparation method thereof.
Background technique
Currently, polyethylene micropore breathable films are widely used in the fields such as paper for daily use and medical protection, such as paper urine
Polyethylene micropore ventilated membrane has been widely used in trousers product, sanitary towels, old man's incontinence pad product, protective clothes etc..Poly- second
Alkene microporous breathable film is indispensable in today's social life, because it has the gas permeability similar with cotton cloth type product, and has
There is the waterproofness similar with Plastic product, so the product using polyethylene micropore breathable films is comfortable, hygienic, convenient, it is deep
Liked by consumer.Existing domestic market conventional polyethylene microporous breathable film almost 100% is produced using the tape casting, and tradition is poly-
Ethylene microporous breathable film, which is primarily present, following several to be difficult to avoid that and solves the problems, such as:
1) minimizing is current global plastic industry developing direction, and the polyethylene micropore ventilated membrane of the tape casting production is in industry
The interior minimum square of grammes per square metre limit is 15gsm, and if necessary to registration printed patterns, the polyethylene micropore of minimum square of grammes per square metre is saturating
Air film is due to being prone to stretcher strain so being not used to normal print production.
2) paper for daily use industry generally pursues product and removes plastic sense, develops towards soft texture direction, closer to consumer
Real demand, but the tape casting is difficult to change and realize.
3) physical mechanical property of conventional polyethylene microporous breathable film is with the reduction of square grammes per square metre, and film performance is also therewith
It reduces, causes many paper products that cannot produce, conventional polyethylene microporous breathable film easily deforms and be stretched phenomenon, leads
Cause high rejection rate in enterprise production process.
4) many products are required to be printed on polyethylene micropore ventilated membrane at present, because of the film of the tape casting production
The poor characteristic of ink adhesion not can be carried out the production of polychrome accurate overprinting, and many products can only single color printing.
5) it is formed after usually being stretched twice because of the tape casting, after necking down twice occurs in plastic film, rim charge rejects more, life
Produce exorbitant expenditure.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of microporous polyethylene breathable films and preparation method thereof.
In order to achieve the object of the present invention, the invention adopts the following technical scheme:
A kind of microporous polyethylene breathable films, the film by coextrusion blow molding obtain, the film include printing layer,
Middle layer and hot sealing layer, the printing layer, middle layer and hot sealing layer are by calcium carbonate, metallocene linear-low density polyethylene
And fluorine-containing processing aid composition, the quality of the calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid
Than for (65~75): (25~35): (0.5~1.5), the partial size of the calcium carbonate are 1~2 μm；The printing layer is with a thickness of 2.5
~3.5 μm, the intermediate layer thickness is 6~8 μm, and the hot sealing layer is with a thickness of 2.5~3.5 μm.
Further, the first metallocene line that the metallocene linear-low density polyethylene is 2.9~3.1 by melt index
Property low density polyethylene (LDPE) and melt index be 0.9~1.1 the second metallocene linear-low density polyethylene constitute, it is described first cyclopentadienyl
The mass ratio of metal linear low density polyethylene (LDPE) and the second metallocene linear-low density polyethylene is 30:21.
It is preferred that the mass ratio of the calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid is 70:
29:1, the printing layer is with a thickness of 3 μm, and the intermediate layer thickness is 7 μm, and the hot sealing layer is with a thickness of 3 μm.
It is preferred that the melt index of first metallocene linear-low density polyethylene is 3, second metallocene linear is low
The melt index of density polyethylene is 1.
A kind of preparation method of the microporous polyethylene breathable films, comprising the following steps:
S1, the printing layer, middle layer and hot sealing layer pellet are put in proportion into melting coextrusion in film blowing machine barrel,
Wherein the inflation film manufacturing machine melt zone temperature is 50~60 DEG C, and extruding zone temperature is 180~190 DEG C, and die head temperature is 185~195
DEG C, extrusion output is 500~600kg/h；
S2, blown film are cooling, are formed；Wherein blow-up ratio is 1:3~5, draw ratio is 3~5；
S3, winding cutting.
It is preferred that melt zone temperature is 55 DEG C in the step S1, extruding zone temperature is 185 DEG C, and die head temperature is 190 DEG C.
The beneficial effects of the present invention are:
1) permeability of microporous polyethylene breathable films of the present invention can bring comfortable impression for consumer, and key refers to
Transmission the weight of vapor of one of the mark from breathable films under unit time unit area, the present invention designed by formula,
The adjustment of machined parameters and accurate control so that the air penetrability deviation for the microporous polyethylene breathable films that blown film produces ±
500g/m2.24h, traditional curtain coating polyethylene micropore thin film accidental sampling air penetrability deviation is in ± 800g/m2.24h.The present invention
The moisture-vapor transmission for the microporous polyethylene breathable films that blown film produces is steamed much larger than the water of curtain coating polyethylene micropore film
Vapor permeability.
2) the unit area grammes per square metre for the polyethylene micropore film that preparation method of the present invention obtains is down to 12gsm, but feel is thick
It is real, because of blowing MDO longitudinal stretching multiplying power >=4.0, CaCO in thin-film material can be allowed3Particle has foamed phenomenon, and the present invention is poly-
Ethylene microporous membrane greatly reduces the usage amount of plastics, energy conservation and environmental protection, while also meeting the use demand of consumer.And it passes
Often actual (real) thickness and the ratio of unit area grammes per square metre are less than normal for system curtain coating polyethylene micropore film, and minimizing has met with bottleneck.
3) polyethylene micropore film of the present invention has higher printing saturation degree, using the soft version high definition flexo of polychrome, highest
The product that galley line number is LPI136 can be produced.Polyethylene micropore film of the present invention has extraordinary ink adhesion, energy
It is enough that excellent polychrome printing product is provided to consumer, it can more attract terminal consumer, so having extraordinary economic valence
Value.
4) polyethylene micropore film of the present invention has better longitudinal tensile strength and Light deformation intensity, polyethylene of the present invention
Microporous membrane and the curtain coating polyethylene micropore film of same grammes per square metre compare after testing, the longitudinal direction of polyethylene micropore film of the present invention
Pull-off force is 2.5~3 times for being cast polyethylene micropore film, and polyethylene micropore film of the present invention is very suitable to the production such as paper diaper
The high-speed production of enterprise or with the non-woven fabric compounded use being bonded.The present invention solves during printing and producing paper diaper
Need the problem that stretcher strain is the smaller the better.
5) polyethylene micropore breathable films itself of the present invention have the micropore of countless intercommunications, and aperture is very fine (about
0.01~10 micron), the water vapour molecule that can only be about 0.4nm through partial size, and to any raindrop or water droplet, because of its partial size mistake
It can not pass through greatly.In this way the vapor that distributes of human body can effectively through hole radial direction external diffusion, and water droplet then can not be inside
Infiltration, to achieve the effect that water-proof moisture-transmitting.
The calcium carbonate is pore-foaming agent, needs accurately to control partial size, and the present invention selects between 1~2 μm, in this way can be compared with
Ventilative micropore is generated during good control blown film simple tension.First metallocene linear-low density polyethylene has preferably
Film bubble stabilization, and there is extraordinary melt strength, the melting of first metallocene linear-low density polyethylene refers to
Number is most suitable 3 or so.Second metallocene linear-low density polyethylene make polyethylene micropore film of the present invention existing compared with
Good air penetrability, and have preferable elongation at break, the melt index of second metallocene linear-low density polyethylene is on 1 left side
It is right most suitable.The fluorine-containing processing aid can be to avoid CaCO3Particle is oxidized easily generation die orifice in high temperature extrusion process
Carbon deposition phenomenon, so that effectively reducing carbon deposition phenomenon influences the quality of machine-shaping film, while to the particle flux of film surface
Diatom has extraordinary improvement result.
Specific embodiment
More specific detail is made to technical solution of the present invention below with reference to embodiment:
The following table 1 is the source of pellet used in embodiment:
| Title | Calcium carbonate | First metallocene linear-low density polyethylene | Second metallocene linear-low density polyethylene | Fluorine-containing processing aid |
| The trade mark | BTF999 | SP2520 | 2038.68 | 100991-K |
| Producer | Ou meter Ya | Mitsui | DOW Chemical | Peace color matching |
Embodiment 1
The preparation of polyethylene micropore breathable films:
S1, the printing layer, middle layer and hot sealing layer pellet are put in proportion into melting coextrusion in film blowing machine barrel,
Wherein the inflation film manufacturing machine melt zone temperature is 50 DEG C, and extruding zone temperature is 180 DEG C, and die head temperature is 185 DEG C, and extrusion output is
500kg/h；
The printing layer, middle layer and hot sealing layer are by calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing
The mass ratio of processing aid composition, the calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid is 65:
35:0.5, the partial size of the calcium carbonate are 1~2 μm；
The first metallocene linear-low density polyethylene that the metallocene linear-low density polyethylene is 2.9 by melt index
The second metallocene linear-low density polyethylene for being 1.1 with melt index is constituted, the poly- second of the first metallocene linear low density
The mass ratio of alkene and the second metallocene linear-low density polyethylene is 30:22；
S2, blown film are cooling, are formed；Wherein the blow-up ratio of film be 1:3, draw ratio 3；
S3, winding cutting, the printing layers of obtained polyethylene micropore breathable films is with a thickness of 2.5 μm, intermediate layer thickness 6
μm, hot sealing layer is with a thickness of 3.5 μm.
Embodiment 2
The preparation of polyethylene micropore breathable films:
S1, the printing layer, middle layer and hot sealing layer pellet are put in proportion into melting coextrusion in film blowing machine barrel,
Wherein the inflation film manufacturing machine melt zone temperature is 60 DEG C, and extruding zone temperature is 190 DEG C, and die head temperature is 195 DEG C, and extrusion output is
600kg/h；
The printing layer, middle layer and hot sealing layer are by calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing
The mass ratio of processing aid composition, the calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid is 75:
25:1.5, the partial size of the calcium carbonate are 1~2 μm；
The first metallocene linear-low density polyethylene that the metallocene linear-low density polyethylene is 3.1 by melt index
The second metallocene linear-low density polyethylene for being 0.9 with melt index is constituted, the poly- second of the first metallocene linear low density
The mass ratio of alkene and the second metallocene linear-low density polyethylene is 30:20；
S2, blown film are cooling, are formed；Wherein the blow-up ratio of film be 1:5, draw ratio 5；
S3, winding cutting, the printing layers of obtained polyethylene micropore breathable films is with a thickness of 3.5 μm, intermediate layer thickness 8
μm, hot sealing layer is with a thickness of 2.5 μm.
Embodiment 3
The preparation of polyethylene micropore breathable films:
S1, the printing layer, middle layer and hot sealing layer pellet are put in proportion into melting coextrusion in film blowing machine barrel,
Wherein the inflation film manufacturing machine melt zone temperature is 55 DEG C, and extruding zone temperature is 185 DEG C, and die head temperature is 190 DEG C, and extrusion output is
550kg/h；
The printing layer, middle layer and hot sealing layer are by calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing
The mass ratio of processing aid composition, the calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing aid is 70:
29:1, the partial size of the calcium carbonate are 1~2 μm；
The metallocene linear-low density polyethylene by melt index be 3 the first metallocene linear-low density polyethylene with
Melt index be 1 the second metallocene linear-low density polyethylene constitute, first metallocene linear-low density polyethylene with
The mass ratio of second metallocene linear-low density polyethylene is 30:21；
S2, blown film are cooling, are formed；Wherein the blow-up ratio of film be 1:4, draw ratio 4；
S3, winding cutting, for the printing layer of obtained polyethylene micropore breathable films with a thickness of 3 μm, intermediate layer thickness is 7 μ
M, hot sealing layer is with a thickness of 3 μm.
The following table 2 is polyethylene micropore breathable films preparation process control parameter of the present invention:
The following table 3 is the polyethylene of the polyethylene micropore breathable films that above-described embodiment produces and conventional tape casting process production
The comparison of microporous breathable film performance technologies index:
From above-mentioned table 3: the polyethylene micropore breathable films of blow moulding production are saturating in pull-off force, hydrostatic pressing, vapor
It crosses the indexs such as rate and all has clear superiority, this cuts for the positioning of corresponding product, polychrome printing chromatography provides excellent technology and protects
Barrier.The physical index of the polyethylene micropore breathable films of blow moulding production is reaching ventilative with the polyethylene micropore of the tape casting production
While film same physical index, the grammes per square metre of polyethylene micropore breathable films unit area of the present invention is smaller, in this way can be with
Minimizing use plastic resin, substantial saved energy consumption, and reduce carbon emission, be disposable living-hygienic articles it is light,
Emission reduction provides guarantee.Polyethylene micropore breathable films of the present invention are with the obvious advantage in terms of physical index, also comply with the sector future
Development trend.
Claims (6)
1. a kind of microporous polyethylene breathable films, it is characterised in that: the film is obtained by coextrusion blow molding, the film packet
Printing layer, middle layer and hot sealing layer are included, the printing layer, middle layer and hot sealing layer are low by calcium carbonate, metallocene linear
Density polyethylene and fluorine-containing processing aid composition, the calcium carbonate, metallocene linear-low density polyethylene and fluorine-containing processing
The mass ratio of auxiliary agent is (65~75): (25~35): (0.5~1.5), and the partial size of the calcium carbonate is 1~2 μm；The printing
Layer is with a thickness of 2.5~3.5 μm, and the intermediate layer thickness is 6~8 μm, and the hot sealing layer is with a thickness of 2.5~3.5 μm；The cyclopentadienyl gold
Belong to first metallocene linear-low density polyethylene and melt index of the linear low density polyethylene by melt index for 2.9~3.1
It is constituted for 0.9~1.1 the second metallocene linear-low density polyethylene.
2. microporous polyethylene breathable films as described in claim 1, it is characterised in that: first metallocene linear low density
The mass ratio of polyethylene and the second metallocene linear-low density polyethylene is 30:21.
3. microporous polyethylene breathable films as described in claim 1, it is characterised in that: the calcium carbonate, metallocene linear are low
The mass ratio of density polyethylene and fluorine-containing processing aid is 70:29:1, and the printing layer is with a thickness of 3 μm, the intermediate thickness
Degree is 7 μm, and the hot sealing layer is with a thickness of 3 μm.
4. microporous polyethylene breathable films as claimed in claim 2, it is characterised in that: first metallocene linear low density
The melt index of polyethylene is 3, and the melt index of second metallocene linear-low density polyethylene is 1.
5. a kind of preparation method of such as described in any item microporous polyethylene breathable films of Claims 1 to 4, including following step
It is rapid:
S1, the printing layer, middle layer and hot sealing layer pellet are put in proportion into melting coextrusion in film blowing machine barrel, wherein
The inflation film manufacturing machine melt zone temperature is 50~60 DEG C, and extruding zone temperature is 180~190 DEG C, and die head temperature is 185~195 DEG C, is squeezed
Output is 500~600kg/h；
S2, blown film are cooling, are formed；Wherein blow-up ratio is 1:3~5, draw ratio is 3~5；
S3, winding cutting.
6. the preparation method of microporous polyethylene breathable films as claimed in claim 5, it is characterised in that: melted in the step S1
Melting section temperature is 55 DEG C, and extruding zone temperature is 185 DEG C, and die head temperature is 190 DEG C.
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| CN109493716B (en) * | 2018-11-15 | 2021-05-04 | 永新股份（黄山）包装有限公司 | Transparent PE label film and production method thereof |
| CN110507841A (en) * | 2019-08-30 | 2019-11-29 | 重庆和泰润佳股份有限公司 | A kind of baby diaper and sanitary napkin |
| CN111040279B (en) * | 2019-12-27 | 2021-12-24 | 上海紫华薄膜科技有限公司 | Preparation method of polyolefin microporous breathable film |
| WO2022015252A1 (en) * | 2020-07-14 | 2022-01-20 | Beşel Basim Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ | Breathable film |
| CN111806026B (en) * | 2020-07-21 | 2021-11-23 | 江门市华龙膜材股份有限公司 | Disposable medical wrist strap film and preparation method thereof |
| CN112537109A (en) * | 2020-10-30 | 2021-03-23 | 永新股份（黄山）包装有限公司 | High-breathability antistatic film for medical protective clothing and preparation method thereof |
| CN112549708A (en) * | 2020-12-31 | 2021-03-26 | 黄山源点新材料科技有限公司 | Stretch-resistant net-shaped winding film and preparation method thereof |
| CN115742489B (en) * | 2022-12-15 | 2023-10-03 | 江西省盛纬材料有限公司 | Thermal aluminum-plastic composite film and preparation method thereof |
| CN117021722A (en) * | 2023-08-21 | 2023-11-10 | 江阴市彩虹塑业有限公司 | Flexible substrate film for flexible electronic device and preparation method thereof |
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