CN105313291A - High-barrier compound membrane sheet and preparing technology thereof - Google Patents
High-barrier compound membrane sheet and preparing technology thereof Download PDFInfo
- Publication number
- CN105313291A CN105313291A CN201510878196.9A CN201510878196A CN105313291A CN 105313291 A CN105313291 A CN 105313291A CN 201510878196 A CN201510878196 A CN 201510878196A CN 105313291 A CN105313291 A CN 105313291A
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- sheet
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- 238000005516 engineering process Methods 0.000 title claims abstract description 27
- 150000001875 compounds Chemical class 0.000 title abstract 6
- 239000012528 membrane Substances 0.000 title abstract 6
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 30
- 238000002360 preparation method Methods 0.000 claims description 22
- 230000004927 fusion Effects 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 9
- 229920003023 plastic Polymers 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 238000007639 printing Methods 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000003490 calendering Methods 0.000 description 3
- 239000003000 extruded plastic Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000021149 fatty food Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000021393 food security Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- B29C2948/92514—Pressure
-
- 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
- B29C2948/9258—Velocity
- B29C2948/926—Flow or feed rate
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparing technology of a high-barrier compound membrane sheet. The technology comprises the following steps of (1), raw material drying; (2), raw material plasticizing; (3), filtering and discharging, wherein, a leaked-material tray is arranged below a filter screen and used for bearing leaked materials; on the one hand, the phenomenon that the leaked materials drop on other portions of a production line or the ground and affect the service life and the cleanness of equipment is avoided; and on the other hand, the leaked materials are collected to be recycled, so that raw materials are saved, and the raw material cost is reduced; (4), compound membrane extruding; and (5), sheet winding. The high-barrier compound membrane sheet is obtained through the preparing technology of the high-barrier compound membrane sheet. Compared with the prior art, the high-barrier compound membrane sheet mainly has the beneficial effects of being low in cost, uniform in thickness, high in surface glossiness, high in barrier property and the like.
Description
Technical field
The present invention relates to sheet material preparing technical field, particularly relate to the multiple film sheet of a kind of high-barrier and preparation technology thereof.
Background technology
Various thermoformed containers, such as the use in daily life of cup, bowl, basin is more and more extensive, along with people are to the raising of the requirement of quality of life, market requires also more and more higher to the class of before-mentioned products.Material for packaging for foodstuff must have different high barriers, and as fatty foods requires high resistant oxidisability and oil resistance, dried foods requires that high resistant is moist; Aromatise foods requires high resistant peculiar smell; And fruit, the fresh and alive food of greengrocery require the gas permeability of packing certain oxygen, carbon dioxide and steam.Require that material has good mechanical performance and chemical stability, to guarantee the quality assurance food security of packaging for foodstuff, the barrier property plastic packaging containers market demand is wide, and development potentiality is large simultaneously.
Preparing high barrier sheet at present, to typically use multi-layer co-extruded plastic sheet material mechanism standby, and multi-layer co-extruded plastic sheet material machine must arrange multiple die head, and some extrudes distributor die head up to five to seven, and thus the price of these multi-layer co-extruded plastic sheet material machines is all very expensive.Double screw extruder and multi-screw extruder also must be used in prior art to complete expressing technique, because Preparation equipment is expensive, cause the sheet material cost that obtains high, and domestic equipment also exists difficult problems such as technology maturation is lower, multiscrew extruded material is uneven; Overseas equipment: price is high, service is difficult to supporting.
Therefore, for existing problems of the prior art, need badly and provide the multiple film sheet technology of preparing of a kind of high-barrier of low cost to seem particularly important.
Summary of the invention
The object of the invention is to avoid weak point of the prior art and provide a kind of high-barrier of low cost multiple film sheet preparation technology.
Object of the present invention is achieved through the following technical solutions:
The multiple film sheet preparation technology of a kind of high-barrier, comprises the following steps:
(1) raw material drying: by little for sheet stock drying 4 ~ 4.5 up to water content < 0.01%;
(2) raw material plasticizing: dried sheet stock delivers to single screw extrusion machine fusion plastification;
(3) discharging is filtered: the sheet stock of fusion plastification is transported to die head after net filtration after filtration; Wherein screen pack is by the automatic draping of on-line automatic net-changing device, is provided with and Lou expects pallet below screen pack, and the sheet stock centralized recovery leaking the access of material pallet utilizes;
(4) multiple film is extruded: the outer surface coating PP film of a roller feed side of three-roller, the outer surface coating high-isolation film of No. two roller feed sides of three-roller, a roller and No. two rollers relatively rotate the superimposed traction by PP film and high-isolation film, and the sheet stock jet flow of fusion plastification is rolled through a roller and No. two rollers rear haulage to three roller of shaping and obtained high-barrier to forming three-decker between PP film and high-isolation film and answer film sheet by die head simultaneously;
Wherein,
Die head extruded velocity is 180kg/h, and die head aperture is 0.25 ~ 2.86mm;
Described PP film is transparent or the PP film of color printing picture and text; Described high-isolation film is transparent or the high-isolation film of color printing picture and text;
The roll-in of three-roller is 190 ~ 550kg/cm;
Roller, No. two rollers and No. three rollers are equipped with water-cooling system respectively;
(5) sheet material winding: multiple for obtained high-barrier film sheet is batched rolling by material collecting device.
Preferably, three rollers of three-roller are 45 ° of inclinations, roller length≤70cm.
Preferably, the clearance distance between a roller and No. two rollers is 0.1 ~ 2.45mm.
Preferably, the thickness of the multiple film sheet of high-barrier is 0.35 ~ 2.2mm.
Preferably, the temperature of roller, No. two rollers and No. three rollers increases successively.
Preferred, the temperature of roller, No. two rollers and No. three rollers is respectively 30 ~ 40 DEG C, 38 ~ 48 DEG C and 60 ~ 65 DEG C.
Preferably, during work, PP film is pressed on the surface of a roller by jockey pulley one, and high-isolation film is pressed on the surface of No. two rollers by jockey pulley two.
Preferably, the water-cooling system that a roller, No. two rollers and No. three rollers arrange respectively is cooling water recirculation system.
Another object of the present invention is to avoid weak point of the prior art and provide a kind of high-barrier of low cost multiple film sheet.
Object of the present invention is achieved through the following technical solutions:
The multiple film sheet of a kind of high-barrier, uses the multiple film sheet preparation technology of the above-mentioned high-barrier stated to obtain.
Preferably, the multiple film sheet of a kind of high-barrier is disposed with bottom, basic unit and top layer, and bottom is PP film, and basic unit is sheet plastics film, and top layer is high-isolation film; Described high-isolation film is multilayer films.
Beneficial effect of the present invention:
A kind of high-barrier of the present invention is multiple film sheet preparation technology comprise the following steps: (1) raw material drying; (2) raw material plasticizing; (3) discharging is filtered; Be provided with below screen pack and Lou expect pallet, leak material pallet and leak material in order to accept, one avoids Lou gob to fall on other positions of production line or ground affects equipment life and cleanliness factor; Two can reclaim Lou material re-using economizes in raw materials, and reduces cost of material; (4) multiple film is extruded; The plastics that PP film, die head are extruded by this step and the superimposed synchronous calendering formation of high-isolation film three, and adopt the roll-in of specific die head extruded velocity, die head aperture and three-roller, not only glossiness is high, smooth surface, barrier excellence (wherein, OTR oxygen transmission rate < 5cm on obtained high-barrier multiple film sheet surface
3/ m
2/ 24hr; Moisture transmission < 5g/m
2/ 24hr), and sheet thickness is even, tensile yield strength>=25.0Mpa; Simultaneously, PP film and high-isolation film can be transparent film, make the surface brightness of sheet material high, PP film and high-isolation film also can be the film of color printing thus make that sheet material color is beautiful, both pictures and texts are excellent, and for the technique using this sheet material to prepare plastic containers saves print steps, not only increase the diversity of sheet material and improve its added value; (5) sheet material winding.Compared with prior art, mainly have the following advantages:
1. utilize single screw extrusion machine to manufacture the multiple film sheet of high-barrier, equipment cost is low, is conducive to reducing production cost;
2. the plastics extruded of singe screw single mode head evenly and plastic basic unit thickness easily adjust and control, the quality of production is stablized, and sheet thickness is even;
3. sheet gloss is high without assorted point, and can the beautiful sheet material that both pictures and texts are excellent of synchronous production color;
4. sheet material has high barrier, the different demands in complete each field;
5. the market competitiveness is strong.
The multiple film sheet of a kind of high-barrier of the present invention, uses the multiple film sheet preparation technology of the above-mentioned high-barrier stated to obtain, and has that cost is low, thickness is even, surface gloss is high and has the advantages such as high barrier.
Accompanying drawing explanation
The present invention will be further described to utilize accompanying drawing, but the content in accompanying drawing does not form any limitation of the invention.
Fig. 1 is the schematic flow sheet of the multiple film sheet preparation technology of a kind of high-barrier of the present invention.
Fig. 2 is an embodiment schematic diagram of the step (4) of the multiple film sheet preparation technology of a kind of high-barrier of the present invention.
Include in fig. 2:
1---die head, 2---PP film, 3---high-isolation film,
4---roller, 5---No. two roller, 6---No. three rollers
7---jockey pulley, 8---water-cooling system.
Detailed description of the invention
The invention will be further described with the following Examples.
embodiment 1
See Fig. 1, the multiple film sheet preparation technology of a kind of high-barrier, comprises the following steps:
(1) raw material drying: by little for sheet stock drying 4 ~ 4.5 up to water content < 0.01%;
(2) raw material plasticizing: dried sheet stock delivers to single screw extrusion machine fusion plastification;
(3) discharging is filtered: the sheet stock of fusion plastification is transported to die head 1 after net filtration after filtration; Wherein screen pack is by the automatic draping of on-line automatic net-changing device, is provided with and Lou expects pallet below screen pack, and the sheet stock centralized recovery leaking the access of material pallet utilizes;
(4) multiple film is extruded:
See Fig. 2, the outer surface coating PP film 2 of roller 4 feed side of three-roller, the outer surface coating high-isolation film 3 of No. two roller 5 feed sides of three-roller, a roller 4 and No. two rollers 5 relatively rotate the superimposed traction by PP film 2 and high-isolation film 3, and the sheet stock jet flow of fusion plastification is rolled through a roller 4 and No. two rollers 5 rear haulage to three roller 6 of shaping and obtained high-barrier to forming three-decker between PP film 2 and high-isolation film 3 and answer film sheet by die head 1 simultaneously;
Wherein,
Die head 1 extruded velocity is 180kg/h, and die head 1 aperture is 0.25 ~ 2.86mm;
Described PP film 2 is transparent or the PP film of color printing picture and text; Described high-isolation film 3 is transparent or the high-isolation film of color printing picture and text;
The roll-in of three-roller is 190 ~ 550kg/cm;
A roller 4, No. two rollers 5 and No. three rollers 6 are equipped with water-cooling system 8 respectively;
(5) sheet material winding: multiple for obtained high-barrier film sheet is batched rolling by material collecting device.
In the present invention,
Three rollers of three-roller are 45 ° of inclinations, three rollers are specially a roller 4, No. two rollers 5 and No. three rollers 6, the central shaft place plane of three rollers and ground angle at 45 °, so be provided with and be beneficial to PP film 2 and high-isolation film 3 layout at growth line, compact overall structure, reduces floor space thus improves plant area utilization rate.Wherein, the roller length≤70cm of three rollers, effectively controls the width of the multiple film sheet of high-barrier, avoids causing waste.
Wherein, clearance distance between a roller 4 and No. two rollers 5 is 0.1 ~ 2.45mm, the thickness of the multiple film sheet of the gap control high-barrier easy to adjust between a roller 4 and No. two rollers 5, simultaneously this gap coordinates the multiple film sheet of high-barrier of the roll-in of three-roller calendering preparation each functional, and such as thickness limit deviation be ± 0.01mm, width limit deviation is ± 1mm, tensile yield strength >=25.0MPa; The thickness of the multiple film sheet of high-barrier is that 0.35 ~ 2.2mm not only meets the requirement of high obstructing performance but also do not waste raw material, and is conducive to the processing that sheet material is follow-up simultaneously.
During work, PP film 2 is pressed on the surface of a roller 4 by jockey pulley 7 one, high-isolation film 3 is pressed on the surface of No. two rollers 5 by jockey pulley 7 two, this step method favorable film is fitted in the surface of roller better, the plastics that guarantee PP film 2, die head 1 are extruded and high-isolation film 3 three superimposed synchronous calendering preferably, guarantee to roll quality.
The multiple film sheet of a kind of high-barrier of the present invention, use the multiple film sheet preparation technology of the above-mentioned high-barrier stated to obtain, it is disposed with bottom, basic unit and top layer, and bottom is PP film, and basic unit is sheet plastics film, and top layer is high-isolation film; Described high-isolation film is multilayer films.The multiple film sheet of this high-barrier has that cost is low, thickness is even, surface gloss is high and has the advantages such as high barrier
embodiment 2
The main technical schemes of the present embodiment is substantially the same manner as Example 1, the feature do not laid down a definition in the present embodiment, adopts the explanation in embodiment 1, no longer repeats at this.
The temperature of a roller of the present embodiment, No. two rollers and No. three rollers increases successively, and the temperature of roller, No. two rollers and No. three rollers is respectively 30 ~ 40 DEG C, 38 ~ 48 DEG C and 60 ~ 65 DEG C.This arranges raw materials melt and extrudes effective, almost bubble-free and assorted point.
embodiment 3
The main technical schemes of the present embodiment and embodiment 1 or embodiment 2 substantially identical, the feature do not laid down a definition in the present embodiment, adopts the explanation in embodiment 1 or embodiment 2, no longer repeats at this.
The water-cooling system that a roller in the present embodiment, No. two rollers and No. three rollers arrange respectively is cooling water recirculation system, and recycle using water as cooling medium, the consumption of cold water reduces greatly, often can save more than 95%, reduces production cost.
Finally should be noted that; above embodiment is only for illustration of technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (10)
1. the multiple film sheet preparation technology of high-barrier, is characterized in that: comprise the following steps:
(1) raw material drying: by little for sheet stock drying 4 ~ 4.5 up to water content < 0.01%;
(2) raw material plasticizing: dried sheet stock delivers to single screw extrusion machine fusion plastification;
(3) discharging is filtered: the sheet stock of fusion plastification is transported to die head after net filtration after filtration; Wherein screen pack is by the automatic draping of on-line automatic net-changing device, is provided with and Lou expects pallet below screen pack, and the sheet stock centralized recovery leaking the access of material pallet utilizes;
(4) multiple film is extruded: the outer surface coating PP film of a roller feed side of three-roller, the outer surface coating high-isolation film of No. two roller feed sides of three-roller, a roller and No. two rollers relatively rotate the superimposed traction by PP film and high-isolation film, and the sheet stock jet flow of fusion plastification is rolled through a roller and No. two rollers rear haulage to three roller of shaping and obtained high-barrier to forming three-decker between PP film and high-isolation film and answer film sheet by die head simultaneously;
Wherein,
Die head extruded velocity is 180kg/h, and die head aperture is 0.25 ~ 2.86mm;
Described PP film is transparent or the PP film of color printing picture and text; Described high-isolation film is transparent or the high-isolation film of color printing picture and text;
The roll-in of three-roller is 190 ~ 550kg/cm;
Roller, No. two rollers and No. three rollers are equipped with water-cooling system respectively;
(5) sheet material winding: multiple for obtained high-barrier film sheet is batched rolling by material collecting device.
2. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, is characterized in that: three rollers of three-roller are 45 ° of inclinations, roller length≤70cm.
3. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, is characterized in that: the clearance distance between a roller and No. two rollers is 0.1 ~ 2.45mm.
4. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, is characterized in that: the thickness of the multiple film sheet of high-barrier is 0.35 ~ 2.2mm.
5. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, is characterized in that: the temperature of roller, No. two rollers and No. three rollers increases successively.
6. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, is characterized in that: the temperature of roller, No. two rollers and No. three rollers is respectively 30 ~ 40 DEG C, 38 ~ 48 DEG C and 60 ~ 65 DEG C.
7. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, it is characterized in that: during work, PP film is pressed on the surface of a roller by jockey pulley one, and high-isolation film is pressed on the surface of No. two rollers by jockey pulley two.
8. the multiple film sheet preparation technology of a kind of high-barrier according to claim 1, is characterized in that: the water-cooling system that a roller, No. two rollers and No. three rollers arrange respectively is cooling water recirculation system.
9. the multiple film sheet of high-barrier, is characterized in that: use the multiple film sheet preparation technology of the high-barrier described in claim 1 ~ 8 any one to obtain.
10. the multiple film sheet of a kind of high-barrier according to claim 9, is characterized in that: be disposed with bottom, basic unit and top layer,
Bottom is PP film, and basic unit is sheet plastics film, and top layer is high-isolation film;
Described high-isolation film is multilayer films.
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CN201510878196.9A CN105313291B (en) | 2015-12-04 | 2015-12-04 | High-barrier laminating sheet and preparation process thereof |
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CN201510878196.9A CN105313291B (en) | 2015-12-04 | 2015-12-04 | High-barrier laminating sheet and preparation process thereof |
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CN105313291B CN105313291B (en) | 2020-08-21 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108099083A (en) * | 2017-12-25 | 2018-06-01 | 福州福启橡塑有限公司 | A kind of sheet rubber extrusion molding production line |
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CN104254444A (en) * | 2012-03-30 | 2014-12-31 | 3M创新有限公司 | Backsheet film with improved hydrolytic stability |
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2015
- 2015-12-04 CN CN201510878196.9A patent/CN105313291B/en active Active
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CN101020378A (en) * | 2006-02-13 | 2007-08-22 | 琳得科株式会社 | Stripping sheet for process and method for fabricating same |
CN104254444A (en) * | 2012-03-30 | 2014-12-31 | 3M创新有限公司 | Backsheet film with improved hydrolytic stability |
Non-Patent Citations (2)
Title |
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RICHARD COLES等: "《食品包装技术》", 31 January 2012, 中国轻工业出版社 * |
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CN108099083A (en) * | 2017-12-25 | 2018-06-01 | 福州福启橡塑有限公司 | A kind of sheet rubber extrusion molding production line |
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Effective date of registration: 20210712 Address after: 515638 east side of Meilin lake, new Chaoshan highway, Anbu Town, Chaozhou City, Guangdong Province Patentee after: GUANGDONG LONGXING PACKAGING INDUSTRIAL Co.,Ltd. Address before: 515638 Guangdong Longxing Packaging Industry Co., Ltd., east of Meilin lake, new Chaoshan highway, Anbu Town, Chao'an District, Chaozhou City, Guangdong Province Patentee before: Wang Xianhuai |
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