CN106079768B - A kind of multilayer packing membrane - Google Patents

A kind of multilayer packing membrane Download PDF

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Publication number
CN106079768B
CN106079768B CN201610589491.7A CN201610589491A CN106079768B CN 106079768 B CN106079768 B CN 106079768B CN 201610589491 A CN201610589491 A CN 201610589491A CN 106079768 B CN106079768 B CN 106079768B
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layer
raw material
weight
packing membrane
multilayer packing
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CN106079768A (en
Inventor
沈正林
丁士琪
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SHANGHAI FANSHUN PACKAGING Co Ltd
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SHANGHAI FANSHUN PACKAGING Co Ltd
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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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • 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
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2307/50—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
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

Abstract

This patent discloses a kind of multilayer packing membrane, is made by co-extrusion to by first layer, the second layer and third layer, and first layer includes the raw material of following percentage by weight：Metallocene PE 45 55%, low density polyethylene (LDPE) 20 30%, LLDPE 17 27%；The second layer includes the raw material of following percentage by weight：LLDPE 60 70%, high density polyethylene (HDPE) 27 37%；Third layer includes the raw material of following percentage by weight：Metallocene PE 45 55%, low density polyethylene (LDPE) 20 30%, LLDPE 17 27%.A kind of multilayer packing membrane provided by the invention, stretching, tearing strength are high, are easy to that heat-sealing, Kekelé structure count are good, and anti-dropping capability and stacking performance are excellent.

Description

A kind of multilayer packing membrane
Technical field
The invention belongs to packaging film field, is related to a kind of multilayer packing membrane.
Background technology
Multilayer packing membrane is respectively provided with good performance in packaging, storage, transport, protection against the tide etc., progressively substitutes traditional answer Film woven bag is closed, is widely used in all trades and professions.Wherein, the multilayer packing membrane performance of individual layer extrusion is more single, is ensureing that mechanics is strong It is difficult the requirement for meeting each links such as packaging, heat-sealing, stacking, transport while spending, multinomial performance index can not be balanced.Three layers altogether Crowded multilayer packing membrane can be by adjusting the raw material and its proportioning of different film layers, so as to meet many index simultaneously.
In order to meet multinomial quality index, existing three-layer co-extruded multilayer packing membrane generally use plurality of raw materials, not only increase Cost of material, while higher is required to production equipment and process condition, reduce product economy value, it is difficult to industrialization extensively.
The content of the invention
The present invention provides a kind of multilayer packing membrane, the defects of to overcome prior art.
To achieve the above object, the present invention provides a kind of multilayer packing membrane, by first layer, the second layer and third layer co-extrusion Into first layer includes the raw material of following percentage by weight：
Metallocene PE 45-55%
Low density polyethylene (LDPE) 20-30%
LLDPE 17-27%；
The second layer includes the raw material of following percentage by weight：
LLDPE 60-70%
High density polyethylene (HDPE) 27-37%；
Third layer includes the raw material of following percentage by weight：
Metallocene PE 45-55%
Low density polyethylene (LDPE) 20-30%
LLDPE 17-27%.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, first layer and/or In three layers of raw material, the mass ratio of metallocene PE and low density polyethylene (LDPE) is 2:1.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, first layer, the second layer Also include auxiliary agent with least one layer of raw material in third layer, auxiliary agent is selected from PPA, opening agent or color masterbatch.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, first layer and/or Three layers of raw material also includes PPA, and its percentage by weight is 1-5%；Or first layer and/or the raw material of third layer also include opening Mouth agent, its percentage by weight is 1-5%；Or the raw material of the second layer also includes color masterbatch, its percentage by weight is 1-5%.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：First layer is by following weight hundred The raw material of ratio is divided to be prepared：
The second layer is prepared by the raw material of following percentage by weight：
LLDPE 65-66%
High density polyethylene (HDPE) 30-32%
Color masterbatch 3-4%；
Third layer is prepared by the raw material of following percentage by weight：
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：First layer is by following weight hundred The raw material of ratio is divided to be prepared：
The second layer is prepared by the raw material of following percentage by weight：
LLDPE 65-66%
High density polyethylene (HDPE) 30-32%
Color masterbatch 3-4%；
Third layer is prepared by the raw material of following percentage by weight：
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, the raw material of third layer In, the mass ratio of PPA and opening agent is 1:1.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, first layer, the second layer Also include starch with least one layer of raw material in third layer, its percentage by weight is 1-10%.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, multilayer packing membrane is total Thickness is 140-250 μm, and the thickness ratio of first layer, the second layer and third layer is 1:2-2.5:1.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, first layer and/or In three layers of raw material：The density of metallocene PE is 0.918-0.919g/cm3, melt index 1.0-1.2g/10min；It is low The density of density polyethylene is 0.919-0.920g/cm3, melt index 0.5-0.7g/10min；LLDPE Density be 0.920-0.921g/cm3, melt index 0.9-1.0g/10min.
Further, the present invention provides a kind of multilayer packing membrane, can also have the feature that：Wherein, the raw material of the second layer In：The density of LLDPE is 0.920-0.921g/cm3, melt index 0.9-1.0g/10min；High density is gathered The density of ethene is 0.946-0.948g/cm3, melt index 6.0-6.2g/10min.
The beneficial effect of this patent is：The present invention provides a kind of multilayer packing membrane, first layer and third layer from certain close Metallocene PE, low density polyethylene (LDPE) and the LLDPE of degree and melt index, three kinds of polyethylene are by certain ratio Example carries out mixture, multilayer packing membrane is had excellent mechanical strength, to meet the requirement such as high-speed packet wiring, stacking and transport；The The LLDPE and high density polyethylene (HDPE) of two layer choosings certain density and melt index, two kinds of polyethylene are by certain ratio Example carries out mixture, multilayer packing membrane is had good deflection and frictional behaviour, while reduces raw material type, makes raw material mixing more Uniformly, the properties of finished product are more stable.In addition, adding starch in each layer raw material, be advantageous to the natural drop of multilayer packing membrane Solution, while ensureing its intensity, is allowed to more environmentally-friendly.A kind of multilayer packing membrane provided by the invention, stretching, tearing strength are high, easily Good in heat-sealing, Kekelé structure count, anti-dropping capability and stacking performance are excellent.
Embodiment
The present invention provides a kind of multilayer packing membrane, is made by co-extrusion to by first layer, the second layer and third layer.First layer includes following The raw material of percentage by weight：45-55% metallocene PEs, 20-30% low density polyethylene (LDPE)s, 17-27% linea low densities gather Ethene；The second layer includes the raw material of following percentage by weight：60-70% LLDPEs, 27-37% high-density polyethylenes Alkene；Third layer includes the raw material of following percentage by weight：45-55% metallocene PEs, 20-30% low density polyethylene (LDPE)s, 17- 27% LLDPE.
Wherein, at least one layer of raw material in first layer, the second layer and third layer can also include auxiliary agent, and auxiliary agent can be PPA, opening agent, the color masterbatch etc. of a variety of colors.Above-mentioned PPA refers to a series of Polymer Processings based on fluoropolymer Auxiliary agent.
Wherein, at least one layer of raw material in first layer, the second layer and third layer can also include starch, its weight percent Than for 1-10%.Starch can be Cereal starch, potato starch, bean starch etc., be used through the modified post-processing of plasticizing.
The gross thickness of multilayer packing membrane is 140-250 μm, and the thickness ratio of first layer, the second layer and third layer is 1:2-2.5:1.
The raw material of multilayer packing membrane is commercially available each quasi-polyethylene and auxiliary agent, and its embodiment is：
Embodiment one
The present embodiment provides a kind of multilayer packing membrane, is made up of the first layer, the second layer and third layer that are co-extruded successively.Respectively The raw material and its proportion of layer etc. are as follows：
As shown above, in the raw material of first layer, the mass ratio of metallocene PE and low density polyethylene (LDPE) is 2:1；The In three layers of raw material, the mass ratio of PPA and opening agent is 1:1.
The gross thickness of multilayer packing membrane is 170 μm, wherein, the thickness of first layer is 40 μm, and the thickness of the second layer is 90 μm, the Three layers are 40 μm, i.e., the thickness ratio of first layer, the second layer and third layer is 1:2.25:1.
The performance for the multilayer packing membrane that the present embodiment provides is as follows：
Embodiment two
The present embodiment provides a kind of multilayer packing membrane, is made up of the first layer, the second layer and third layer that are co-extruded successively.Respectively The raw material and its proportion of layer etc. are as follows：
As shown above, in first layer and the raw material of third layer, the mass ratio of metallocene PE and low density polyethylene (LDPE) For 2:1；In the raw material of third layer, the mass ratio of PPA and opening agent is 1:1.
The gross thickness of multilayer packing membrane is 140 μm, wherein, the thickness of first layer is 35 μm, and the thickness of the second layer is 70 μm, the Three layers are 35 μm, i.e., the thickness ratio of first layer, the second layer and third layer is 1:2:1.
The performance for the multilayer packing membrane that the present embodiment provides is as follows：
Embodiment three
The present embodiment provides a kind of multilayer packing membrane, is made up of the first layer, the second layer and third layer that are co-extruded successively.Respectively The raw material and its proportion of layer etc. are as follows：
As shown above, in the raw material of third layer, the mass ratio of metallocene PE and low density polyethylene (LDPE) is 2:1.
The gross thickness of multilayer packing membrane is 250 μm, wherein, the thickness of first layer is 60 μm, and the thickness of the second layer is 130 μm, Third layer is 60 μm, i.e., the thickness ratio of first layer, the second layer and third layer is 1:2.17:1.
The performance for the multilayer packing membrane that the present embodiment provides is as follows：
Example IV
The present embodiment provides a kind of multilayer packing membrane, is made up of the first layer, the second layer and third layer that are co-extruded successively.Respectively The raw material and its proportion of layer etc. are as follows：
The gross thickness of multilayer packing membrane is 200 μm, wherein, the thickness of first layer is 45 μm, and the thickness of the second layer is 110 μm, Third layer is 45 μm, i.e., the thickness ratio of first layer, the second layer and third layer is 1:2.44:1.
The performance for the multilayer packing membrane that the present embodiment provides is as follows：
Embodiment five
The present embodiment provides a kind of multilayer packing membrane, is made up of the first layer, the second layer and third layer that are co-extruded successively.Respectively The raw material and its proportion of layer etc. are as follows：
The gross thickness of multilayer packing membrane is 180 μm, wherein, the thickness of first layer is 40 μm, and the thickness of the second layer is 100 μm, Third layer is 40 μm, i.e., the thickness ratio of first layer, the second layer and third layer is 1:2.5:1.
The performance for the multilayer packing membrane that the present embodiment provides is as follows：
Embodiment six
The present embodiment provides a kind of multilayer packing membrane, is made up of the first layer, the second layer and third layer that are co-extruded successively.Respectively The raw material and its proportion of layer etc. are as follows：
The gross thickness of multilayer packing membrane is 220 μm, wherein, the thickness of first layer is 50 μm, and the thickness of the second layer is 120 μm, Third layer is 50 μm, i.e., the thickness ratio of first layer, the second layer and third layer is 1:2.4:1.
The performance for the multilayer packing membrane that the present embodiment provides is as follows：

Claims (5)

1. a kind of multilayer packing membrane, it is made by co-extrusion to by first layer, the second layer and third layer, it is characterised in that：
The first layer includes the raw material of following percentage by weight：
Metallocene PE 45-55%
Low density polyethylene (LDPE) 20-30%
LLDPE 17-27%；
The second layer includes the raw material of following percentage by weight：
LLDPE 60-70%
High density polyethylene (HDPE) 27-37%；
The third layer includes the raw material of following percentage by weight：
Metallocene PE 45-55%
Low density polyethylene (LDPE) 20-30%
LLDPE 17-27%.
At least one layer of raw material in the first layer, the second layer and the third layer also includes auxiliary agent, the auxiliary agent choosing From PPA, opening agent or color masterbatch；
At least one layer of raw material in the first layer, the second layer and the third layer also includes starch, its weight percent Than for 1-10%；
The gross thickness of the multilayer packing membrane is 140-250 μm, the thickness ratio of the first layer, the second layer and the third layer For 1:2-2.5:1；
In the first layer and/or the raw material of the third layer：
The density of the metallocene PE is 0.918-0.919g/cm3, melt index 1.0-1.2g/10min；
The density of the low density polyethylene (LDPE) is 0.919-0.920g/cm3, melt index 0.5-0.7g/10min；
The density of the LLDPE is 0.920-0.921g/cm3, melt index 0.9-1.0g/10min；
In the raw material of the second layer：
The density of the LLDPE is 0.920-0.921g/cm3, melt index 0.9-1.0g/10min；
The density of the high density polyethylene (HDPE) is 0.946-0.948g/cm3, melt index 6.0-6.2g/10min.
2. multilayer packing membrane according to claim 1, it is characterised in that：
Wherein, in the first layer and/or the raw material of the third layer, the metallocene PE and the low density polyethylene (LDPE) Mass ratio be 2:1.
3. multilayer packing membrane according to claim 1, it is characterised in that：
Wherein, the first layer and/or the raw material of the third layer also include the PPA, and its percentage by weight is 1-5%；
Or the first layer and/or the raw material of the third layer also include the opening agent, its percentage by weight is 1-5%；
Or the raw material of the second layer also includes the color masterbatch, its percentage by weight is 1-5%.
4. according to the multilayer packing membrane described in claim 1,2 or 3, it is characterised in that：
The first layer is prepared by the raw material of following percentage by weight：
The second layer is prepared by the raw material of following percentage by weight：
LLDPE 65-66%
High density polyethylene (HDPE) 30-32%
Color masterbatch 3-4%；
The third layer is prepared by the raw material of following percentage by weight：
5. multilayer packing membrane according to claim 4, it is characterised in that：
Wherein, in the raw material of the third layer, the mass ratio of the PPA and the opening agent is 1:1.
CN201610589491.7A 2016-07-25 2016-07-25 A kind of multilayer packing membrane Active CN106079768B (en)

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CN106079768B true CN106079768B (en) 2018-04-06

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CN107446211A (en) * 2017-08-09 2017-12-08 安徽远锦文化环境艺术工程有限公司 A kind of three-layer co-extruded PE gardening mold materials of cold-resistant high tenacity

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JP2005193609A (en) * 2004-01-09 2005-07-21 Idemitsu Unitech Co Ltd Multi-layer film
CN101357703A (en) * 2008-09-19 2009-02-04 蚌埠蓝天塑料包装有限公司 Liquid packaging degradation film
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