CN102514331A - Microwave heatable bowl cover film with good planeness and preparation method thereof - Google Patents
Microwave heatable bowl cover film with good planeness and preparation method thereof Download PDFInfo
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- CN102514331A CN102514331A CN2011104382177A CN201110438217A CN102514331A CN 102514331 A CN102514331 A CN 102514331A CN 2011104382177 A CN2011104382177 A CN 2011104382177A CN 201110438217 A CN201110438217 A CN 201110438217A CN 102514331 A CN102514331 A CN 102514331A
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- epiphragma
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Abstract
The invention relates to a microwave heatable bowl cover film with good planeness and a preparation method thereof. The bowl cover film comprises, from top to bottom, an external layer, an intermediate layer and a heat sealing layer; the external layer is a PET (polyethylene terephthalate) film surface layer; the intermediate layer is a double gummed paper layer; the heat sealing layer which is a composite polyethylene-vinyl acetate film is obtained by coextruding a composite layer, a core layer and a sealing layer from top to bottom, materials of the composite layer and the core layer are formed by mixing low density polyethylene and linear low density polyethylene according to a weight ratio of 3:2, and the material of the sealing layer is ethylene-vinyl acetate; the PET film surface layer and the double gummed paper layer are composited together by a polyurethane adhesive layer; and the double gummed paper layer and the composite polyethylene-vinyl acetate film are composited together by a casting polyethylene layer. The bowl cover film prepared in the invention, which has a good planeness, can be heated by microwaves.
Description
Technical field
But the present invention relates to bowl epiphragma of a kind of good planeness and heating using microwave and preparation method thereof, be mainly used in all kinds of instant noodles, instant-rice bowl epiphragma, belong to packaging for foodstuff composite and preparation method thereof technical field.
Background technology
Along with the development in market, snack more and more receives liking of people, and instant noodles are exactly wherein a kind of.Instant noodles contain oiliness mostly; So it is moist high with the requirement of resistance oxygen property to its resistance; Existing instant noodles packing mainly contains bowl dress and packed, and common in the market bowl dress epiphragma uses the structure of PAPER/AL/SPE, PAPER/LDPE/AL/HSL and PET/PAPER/AL/PE more, and following problem appears in this class formation easily: (1) tear-off lid period of the day from 11 p.m. to 1 a.m is torn easily; Ply of paper separates with aluminium lamination in the epiphragma, and the epiphragma fragment can remain on the Instant noodle bucket; (2) these structures all contain aluminium foil layer, because of microwave has reflex to metal material, so structure can not be applied to heating using microwave.In order to satisfy the allegro life requirement of modern; Make instant noodles also can carry out the micro-wave oven heating; Just must make does not have aluminium lamination in the instant noodles epiphragma, but because the percent thermal shrinkage between the layers of material is different, the epiphragma of this no aluminium lamination structure bends easily; And mostly instant noodles processing is mechanical suction cover, very high to the flatness requirement of epiphragma.
Summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, but a kind of heating using microwave bowl epiphragma that flatness is fabulous again simultaneously and preparation method thereof is provided.
The objective of the invention is to realize like this:
But the bowl epiphragma of a kind of good planeness and heating using microwave is followed successively by skin, intermediate layer and hot sealing layer from top to bottom.
Described hot sealing layer is that thickness is composite polyethylene-vinyl acetate (PE-EVA) of 30 μ m, and described composite polyethylene-vinyl acetate is followed successively by composite bed from top to bottom, sandwich layer, seal.Described composite bed and sandwich layer: be low density polyethylene (LDPE) (LDPE) and LLDPE (LLDPE) that blown film is co-extruded, its weight ratio is 3:2.
Described seal: be blown film individual layer ethene-vinyl acetate (EVA).
The percent thermal shrinkage of described composite polyethylene-vinyl acetate is generally 20～70%.
Described intermediate layer is the wood-free paper (PAPER) of 90G, and its percent thermal shrinkage is generally 0%.
Be the curtain coating polyethylene between said wood-free paper layer and composite polyethylene-vinyl acetate layer; The low density polyethylene (LDPE) (LDPE) that described curtain coating polyethylene is 15 μ m; Described low density polyethylene (LDPE): extrude compoundly through 210 ℃～330 ℃ for the low density polyethylene (LDPE) particle, its percent thermal shrinkage is generally 20～70%.
Described skin is that thickness is PETG (PET) film of 12 μ m, and its percent thermal shrinkage is 45～55%, and its lower surface is provided with ink lay.
Said skin and wood-free paper are bonding through polyurethane glue.
Composite bed, the sandwich layer of composite polyethylene-vinyl acetate of the present invention mainly take blocking effect, and make hot sealing layer when intercepting, and also have good heat sealability.
Preparation method of the present invention comprises following operation:
A, PETG (PET) layer printing process: under 50～60 ℃ situation, the PET film is carried out colored printing, form the PET print film;
The preparation section of b, composite polyethylene-vinyl acetate (PE-EVA) layer: with each layers of polyethylene resin and ethylene-vinyl acetate resin proportionally, place respectively in the barrel separately, after extruder is extruded, process composite polyethylene-vinyl acetate film.
C, dry type are compound: the PET print film gluing of oneself having been printed pattern and character; Compound through dry compound machine and PAPER90G; Used glue is polyurethane glue, and adhesive operation concentration is controlled at examines grace cup 16-17 second, coating weight 2.5-3.3gsm for No. 3; Compound Tension Control is 35%, and humidity regulation is 40%～50%.
Compound tension force is strengthened, because the percent thermal shrinkage of PET and PAPER is different, can be so that compound semi-finished product be curling a little towards the PET face.
D, extrude compound: PET/INK/PAPER squeezes multiple PE in the middle of doing multiple half-finished paper face and PE-EVA corona treatment face, and two put the 0kgf that is set to of PE tension force, and the PE-EVA face of bowl epiphragma need dust simultaneously, and the voltage that dusts is 3-4V, and powder is an edible starch.
Because the percent thermal shrinkage of PE-EVA is bigger; The epiphragma material is crooked to the PE-EVA face easily, though tension force is set to 0kgf, in fact can not be 0kgf; Doing multiple semi-finished product can be curling a little towards the PET face; Squeeze to comprehend towards the PE face by the road again and curl, between to a certain degree with internal force and power, neutralize like this, just can obtain comparatively smooth bowl epiphragma.Dusting, it is sticking glutinous to be not easy between caudacoria and the film, is convenient to the processing of instant noodles machinery suction cover more.
E, cut:, compound good packaging film is cut the rolling film according to the needed different in width of die-cutting machine, length, specification.
F, cross cutting: will roll up film according to requirement of client and touch and be cut into the sheet epiphragma, the plane is placed in the monolithic section, printing surface down, ruler is measured the height that curls at 0-15mm.
The characteristics of epiphragma of the present invention are following:
(1) skin: adopt the PET film, PET belongs to stress layer, and it has higher draw tensile strength, and its good transparency can fully represent the fineness of printing simultaneously.
(2) intermediate layer: adopt PAPER, can keep good deflection.
(3) interior hot sealing layer: adopt compound PE-EVA film, have good heat sealability.
(4) whole knot epiphragma does not have the aluminium foil structure, can be used for heating using microwave.
(5) do multiple and crowded multiple tension force through control, prepared epiphragma flatness is better.
(6) make through dusting be not easy between the epiphragma sticking glutinous.
Description of drawings
Fig. 1 is a process chart of the present invention.
Fig. 2 is a kind of good planeness that relates to of the present invention and the section structure sketch map that does not contain aluminium foil structure bowl epiphragma.
Among the figure: PET film top layer 1, ink lay 2, polyurethane glue-line 3, wood-free paper layer 4, curtain coating polyethylene layer 5, composite polyethylene-vinyl acetate layer 6, edible stratum granulosum 7.
Fig. 3 is the crimpness datagram of 16 roll of material among the embodiment 1,2,3,4.
The specific embodiment
Below in conjunction with instance the present invention is elaborated.The technical indicator of the raw material that the present invention is used is following:
PET：
PE-EVA：
PAPER：
Embodiment 1:
A, PETG (PET) layer printing process: under 50 ℃ situation, the PET film is carried out colored printing, form the PET print film;
The preparation section of b, composite polyethylene-vinyl acetate (PE-EVA) layer: with each layers of polyethylene resin and ethylene-vinyl acetate resin proportionally, place respectively in the barrel separately, after extruder is extruded, process composite polyethylene-vinyl acetate film.
C, dry type are compound: the PET print film gluing of oneself having been printed pattern and character; Compound through dry compound machine and PAPER90G; Used glue is polyurethane glue, and adhesive operation concentration is controlled at examines grace cup 16-17 second, coating weight 2.5-3.3gsm for No. 3; Compound Tension Control is 28%, and humidity regulation is 40%～50%.
D, extrude compound: PET/INK/PAPER squeezes multiple PE in the middle of doing multiple half-finished paper face and PE-EVA corona treatment face, and two put the 0.5kgf that is set to of PE tension force, and the PE-EVA face of bowl epiphragma need dust simultaneously, and the voltage that dusts is 3-4V, and powder is an edible starch.
E, cut:, compound good packaging film is cut the rolling film according to the needed different in width of die-cutting machine, length, specification.
F, cross cutting: will roll up film according to requirement of client and be die-cut to the sheet epiphragma, the plane is placed in monolithic section, printing surface down, ruler is measured the height that curls at 0-15mm.
Embodiment 2
Remove c, dry type is compound: compound Tension Control is 40%; D, extrude compound: two put the 0.1kgf that is set to of PE tension force.Outward, all the other are identical with embodiment 1.
Embodiment 3: remove c, dry type is compound: compound Tension Control is 35%; D, extrude compound: two put the 0.3kgf that is set to of PE tension force.Outward, all the other are identical with embodiment 1.
Embodiment 4 removes c, dry type is compound: compound Tension Control is 35%.D, extrude compound: two put the 0kgf that is set to of PE tension force.Outward, all the other are identical with embodiment 1.
The key technical indexes of embodiment 1,2,3,4
When measuring crimpness, the single piece of material after delivery is cut is placed in the plane, and printing surface down; Ruler is measured its height that curls; The crimpness measurement result of embodiment 1,2,3,4 is as shown in Figure 3, and as can be seen from the figure, compound tension force is 35% when doing again; When PE tension force was 0kg when squeezing again, epiphragma was the most smooth.
Claims (10)
- But 1. the bowl epiphragma of good planeness and heating using microwave, it is characterized in that: said bowl epiphragma comprises from top to bottom skin, intermediate layer and hot sealing layer;Said skin is PET film top layer;Said intermediate layer is the wood-free paper layer;Described hot sealing layer is composite polyethylene-vinyl acetate film; It is co-extruded by composite bed, sandwich layer and seal from top to bottom; By weight for 3:2 mixes, said sealing material is an ethene-vinyl acetate by low density polyethylene (LDPE) and LLDPE for described composite bed and core material;Be combined with each other through the polyurethane glue-line between said PET film top layer and the wood-free paper layer;Be combined with each other through the curtain coating polyethylene layer between said wood-free paper layer and composite polyethylene-vinyl acetate film.
- 2. but the bowl epiphragma of a kind of good planeness according to claim 1 and heating using microwave, it is characterized in that: said curtain coating polyethylene layer adopts low density polyethylene (LDPE), and its thickness is 15 μ m.
- 3. but the bowl epiphragma of a kind of good planeness according to claim 2 and heating using microwave, it is characterized in that: the thickness of said composite polyethylene-vinyl acetate is 30 μ m.
- 4. but the bowl epiphragma of a kind of good planeness according to claim 1 and heating using microwave, it is characterized in that: the percent thermal shrinkage of described composite polyethylene-vinyl acetate is 20～70%.
- 5. but the bowl epiphragma of a kind of good planeness according to claim 1 and heating using microwave, it is characterized in that: said intermediate layer is the wood-free paper layer of 90G.
- 6. but the bowl epiphragma of a kind of good planeness according to claim 1 and heating using microwave, it is characterized in that: described outer field PET film skin depth is 12 μ m, and its percent thermal shrinkage is 45～55%.
- 7. but the bowl epiphragma of a kind of good planeness according to claim 1 and heating using microwave, it is characterized in that: described outer field PET film is the PET print film.
- 8. but the bowl epiphragma of a kind of good planeness according to claim 1 and heating using microwave is characterized in that: the bottom surface of the hot sealing layer of said bowl epiphragma is provided with stratum granulosum.
- 9. but prepare the method for the bowl epiphragma of a kind of good planeness as claimed in claim 1 and heating using microwave, it is characterized in that: said method comprises following operation:A, PET thin layer printing process: under 50～60 ℃ situation, the PET film is carried out colored printing, form the PET print film;The preparation section of b, composite polyethylene-vinyl acetate layer: with each layers of polyethylene resin and ethylene-vinyl acetate resin proportionally, place respectively in the barrel separately, after extruder is extruded, process the PE-EVA film;C, dry type are compound: the PET print film gluing of oneself having been printed pattern and character; Compound through dry compound machine and wood-free paper; Used glue is polyurethane glue, and adhesive operation concentration is controlled at examines grace cup 16-17 second, coating weight 2.5-3.3gsm for No. 3; Compound Tension Control is at 28%-40%, and humidity regulation is 40%～50%;D, extrude compound: step c squeezes PE again in the middle of doing the PE face of the PE-EVA film that multiple half-finished paper face and step b process; The blowing tension force of said PE-EVA film≤0.5 kgf; The PE-EVA face of bowl epiphragma need dust simultaneously, and the voltage that dusts is 3-4V, and powder is an edible starch;E, cut;F, cross cutting.
- But 10. the preparation method of the bowl epiphragma of a kind of good planeness according to claim 9 and heating using microwave, it is characterized in that: compound Tension Control is 35% among the said step c; The blowing tension force of the film of PE-EVA described in the steps d is 0 kgf.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104382177A CN102514331A (en) | 2011-12-24 | 2011-12-24 | Microwave heatable bowl cover film with good planeness and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104382177A CN102514331A (en) | 2011-12-24 | 2011-12-24 | Microwave heatable bowl cover film with good planeness and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102514331A true CN102514331A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104382177A Pending CN102514331A (en) | 2011-12-24 | 2011-12-24 | Microwave heatable bowl cover film with good planeness and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935753A (en) * | 2012-10-24 | 2013-02-20 | 黄山永新股份有限公司 | Sealing cover film |
| CN104553213A (en) * | 2015-01-20 | 2015-04-29 | 浙江虎跃包装材料有限公司 | Convenient food cup cover capable of being subjected to microwave heating and manufacturing process of cup cover |
| CN111572998A (en) * | 2020-05-22 | 2020-08-25 | 温州市恒生包装有限公司 | Multidirectional crack arrest pyrocondensation membrane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647358U (en) * | 2010-03-25 | 2010-11-24 | 江阴宝柏包装有限公司 | Easy-uncovered covering film for low-temperature yoghurt |
| CN201686158U (en) * | 2010-03-25 | 2010-12-29 | 江阴宝柏包装有限公司 | Instant noodle bowl cover capable of being heated by microwave |
-
2011
- 2011-12-24 CN CN2011104382177A patent/CN102514331A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647358U (en) * | 2010-03-25 | 2010-11-24 | 江阴宝柏包装有限公司 | Easy-uncovered covering film for low-temperature yoghurt |
| CN201686158U (en) * | 2010-03-25 | 2010-12-29 | 江阴宝柏包装有限公司 | Instant noodle bowl cover capable of being heated by microwave |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102935753A (en) * | 2012-10-24 | 2013-02-20 | 黄山永新股份有限公司 | Sealing cover film |
| CN102935753B (en) * | 2012-10-24 | 2015-06-10 | 黄山永新股份有限公司 | Sealing cover film |
| CN104553213A (en) * | 2015-01-20 | 2015-04-29 | 浙江虎跃包装材料有限公司 | Convenient food cup cover capable of being subjected to microwave heating and manufacturing process of cup cover |
| CN111572998A (en) * | 2020-05-22 | 2020-08-25 | 温州市恒生包装有限公司 | Multidirectional crack arrest pyrocondensation membrane |
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Application publication date: 20120627 |