CN201287894Y - Polyester film for light-prevention and food packaging - Google Patents
Polyester film for light-prevention and food packaging Download PDFInfo
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- CN201287894Y CN201287894Y CNU2008200278464U CN200820027846U CN201287894Y CN 201287894 Y CN201287894 Y CN 201287894Y CN U2008200278464 U CNU2008200278464 U CN U2008200278464U CN 200820027846 U CN200820027846 U CN 200820027846U CN 201287894 Y CN201287894 Y CN 201287894Y
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- mylar
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- foodstuff
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Abstract
The utility model discloses a polyester film for packaging light-avoiding fresh-keeping food, which has a three-layer laminated structure, wherein the upper surface layer of the laminated structure is a white skin layer, the middle layer of the laminated structure is a black core layer, and the lower surface layer of the laminated structure is a heat-sealing layer, wherein the white skin layer, the black core layer and the heat-sealing layer are directly co-extruded and compounded. The polyester film disclosed by the utility model has the advantages of avoiding light, keeping fresh and thermally heating, which is very suitable for packing liquid or solid food which has requirements to light transmission, and can replace aluminized mylar in some fields, and the white skin layer can replace white ink printing, and the polyester film has a very important significance for reducing pollution.
Description
Technical field
The utility model relates to the mylar technical field, relates in particular to a kind of mylar that light transmission is had the liquid or solid used for packing foods of requirement.
Background technology
Biaxially oriented polyester film has good mechanical property, superior light transmission, is widely used in the packaging for foodstuff field.But for the food that needs lucifuge, fresh-keeping storage, transparent polyester film just can't satisfy this requirement.Though the mylar after aluminizing can address this problem, inevitably can increase cost, and the coating oxidation may occur, easily come off, bonding a series of quality problems such as not firm.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of mylar is provided, and this mylar need not to aluminize, and can be directly used in the packing of the food that needs lucifuge, fresh-keeping storage.
For solving the problems of the technologies described above, the technical solution of the utility model is: the mylar that is used for the light-proof, preservative packaging for foodstuff, it has three shape structures layer by layer, the upper epidermis of this laminar texture is white top layer, the interlayer of this laminar texture is the black sandwich layer, the following top layer of this laminar texture is a hot sealing layer, and described white top layer, black sandwich layer and hot sealing layer be directly coextru-lamination all.
Wherein, the Main Ingredients and Appearance on described white top layer is crystallinity polyester and titanium dioxide white pigment.
Wherein, the Main Ingredients and Appearance of described black sandwich layer is crystallinity polyester and charcoal blacks.
Wherein, the Main Ingredients and Appearance amorphous polyester of described hot sealing layer or fusing point benzene modified poly ester between between 110～220 ℃.
Owing to adopted technique scheme, the beneficial effects of the utility model are: certain photophobism can be played in white top layer, the more important thing is the bottom that can replace the white ink printing, reduces the pollution of printing-ink to environment and packaged food; The black sandwich layer can stop seeing through of light, mainly plays the lucifuge effect; Hot sealing layer can seal with oneself easily and make packaging bag, also can seal with the pallet of preparations such as APET, CPET, as sealing cover plate.The mylar that the utility model disclosed is suitable for light transmission is had the packing of the liquid or solid food of requirement very much, can replace aluminized mylar in some field.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Accompanying drawing is the structure cutaway view of the utility model embodiment.
The specific embodiment
As shown in drawings, a kind of mylar that is used for the light-proof, preservative packaging for foodstuff, it has three shape structures layer by layer, the upper epidermis of this laminar texture is white top layer 1, the interlayer of this laminar texture is a black sandwich layer 2, the following top layer of this laminar texture is a hot sealing layer 3, and described white top layer 1, black sandwich layer 2 and hot sealing layer 3 be directly coextru-lamination all.
Wherein, the Main Ingredients and Appearance on described white top layer 1 is crystallinity polyester and titanium dioxide white pigment, the crystallinity polyester can be one or more the compound among PET, PBT, PTT, the PEN etc., also can be the polyester modification thing that adds aromatic or aliphatic dibasic acid, diatomic alcohol.The particle diameter of titanium dioxide white pigment is between 0.1～1.0um, and is best between 0.2～0.6um, better between 0.2～0.3um.Titanium dioxide is 10～50wt% of white top layer 1 total weight, and is best between 10～30wt%, better between 15～25wt%.
Wherein, the Main Ingredients and Appearance of described black sandwich layer 2 is crystallinity polyester and charcoal blacks, the crystallinity polyester can be one or more the compound among PET, PBT, PTT, the PEN etc., also can be the polyester modification thing that adds aromatic or aliphatic dibasic acid, diatomic alcohol.The particle diameter of charcoal blacks requires between 0.1～1.0um, and is best between 0.2～0.6um, better between 0.2～0.3um.Charcoal blacks be black sandwich layer 2 total weightes 5～30wt%, be preferably between 7～20wt%, better between 10～15wt%.
Wherein, the Main Ingredients and Appearance amorphous polyester of described hot sealing layer 3 or fusing point benzene modified poly ester between between 110～220 ℃, armorphous polyester is preferably PETG.Certainly, contain additives such as the antiseize agent that is necessary and antistatic additive in the hot sealing layer 3, this is well known to those of ordinary skill in the art.Antiseize agent can be the particulate matter of particle diameter at the organic or inorganic of 2～5um, as silicon dioxide, kaolin, french talc, calcium carbonate, mica powder, crosslinked acrylic resin, cross-linked styrene resin or the like.
The thickness of described mylar is 12～75um, and wherein, the thickness on white top layer 1 accounts for 10～15% of mylar gross thickness, and the thickness of hot sealing layer 3 accounts for 10～15% of mylar gross thickness.
The above-mentioned mylar that is used for the light-proof, preservative packaging for foodstuff can create by following production technology.
Composition of raw materials:
1) white top layer
PET (polyethylene terephthalate, IV=0.75) 20wt%
White polyester masterbatch (S-10 (50)) 50wt%
Silicon dioxide polyester slice (3000ppm) 30wt%
2) black sandwich layer
PET (polyethylene terephthalate, IV=0.75) 20wt%
Black polyester masterbatch (SPUNDUE EG BK 253 CLC) 60wt%
Silicon dioxide polyester slice (3000ppm) 20wt%
3) hot sealing layer
PETG(EASTMAN?6763) 95wt％
PETG additive (EASTMAN C003) 5wt%.
Technological process:
With above-mentioned raw materials, after mixing in proportion, melt extrude in the adding extruder separately.If the employing double screw extrusion machine, raw material can be dry, and the temperature of each section of extruder is set at 250～260 ℃; If employing single screw extrusion machine, mixed raw materials need be dried to moisture and be lower than 30ppm, melt extrude then, each of extruder section temperature is set at 250～280 ℃.
The melt of being extruded by three extruders passes through co-extrusion die head respectively, in the moulding of sharp cooling roll direct casting sheet, 25～35 ℃ of sharp cooling roll temperature;
The casting sheet that obtains is through after 60-80 ℃ the preheating, 3.0 times of longitudinal stretchings, and then through after the 100-120 ℃ of preheating, 3.0 times of cross directional stretchs, finalized the design 1～5 second down at 220～240 ℃ then, through over cooling, corona, rolling with cut, obtain being used for the mylar of light-proof, preservative packaging for foodstuff at last.
By the mylar that above-mentioned production technology is made, its light transmittance is 0%, heat seal strength 3.0N/15mm.
The mylar that the utility model disclosed has lucifuge, fresh-keeping, heat sealable advantage, be suitable for very much light transmission is had the packing of the liquid or solid food of requirement, can replace aluminized mylar in some field, and its white top layer can replace the white ink printing, to reduce pollute significant.
Claims (5)
1. the mylar that is used for the light-proof, preservative packaging for foodstuff, it is characterized in that: have three shape structures layer by layer, the upper epidermis of this laminar texture is white top layer (1), the interlayer of this laminar texture is black sandwich layer (2), the following top layer of this laminar texture is hot sealing layer (3), and described white top layer (1), black sandwich layer (2) and hot sealing layer (3) be directly coextru-lamination all.
2. the mylar that is used for the light-proof, preservative packaging for foodstuff as claimed in claim 1 is characterized in that: the Main Ingredients and Appearance on described white top layer (1) is crystallinity polyester and titanium dioxide white pigment.
3. the mylar that is used for the light-proof, preservative packaging for foodstuff as claimed in claim 1 is characterized in that: the Main Ingredients and Appearance of described black sandwich layer (2) is crystallinity polyester and charcoal blacks.
4. the mylar that is used for the light-proof, preservative packaging for foodstuff as claimed in claim 1 is characterized in that: the Main Ingredients and Appearance amorphous polyester of described hot sealing layer (3) or fusing point benzene modified poly ester between between 110～220 ℃.
5. be used for the mylar of light-proof, preservative packaging for foodstuff as described any of claim 1 to 4, it is characterized in that: the thickness of described mylar is 12～75um, wherein, white the top layer (1) thickness account for 10～15% of mylar gross thickness, the thickness of hot sealing layer (3) account for the mylar gross thickness 10～15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200278464U CN201287894Y (en) | 2008-08-30 | 2008-08-30 | Polyester film for light-prevention and food packaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200278464U CN201287894Y (en) | 2008-08-30 | 2008-08-30 | Polyester film for light-prevention and food packaging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201287894Y true CN201287894Y (en) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200278464U Expired - Fee Related CN201287894Y (en) | 2008-08-30 | 2008-08-30 | Polyester film for light-prevention and food packaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201287894Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218881A (en) * | 2011-03-29 | 2011-10-19 | 奥瑞金包装股份有限公司 | Low surface energy polyester film and preparation method and application thereof |
| CN106183270A (en) * | 2016-08-11 | 2016-12-07 | 苏州柯创电子材料有限公司 | Composite bed mylar |
| CN108700507A (en) * | 2015-12-18 | 2018-10-23 | 拜奥法尔防护有限责任公司 | Solid fluorescence standard items |
-
2008
- 2008-08-30 CN CNU2008200278464U patent/CN201287894Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218881A (en) * | 2011-03-29 | 2011-10-19 | 奥瑞金包装股份有限公司 | Low surface energy polyester film and preparation method and application thereof |
| CN108700507A (en) * | 2015-12-18 | 2018-10-23 | 拜奥法尔防护有限责任公司 | Solid fluorescence standard items |
| US11340169B2 (en) | 2015-12-18 | 2022-05-24 | Biofire Defense, Llc | Solid fluorescence standard |
| CN106183270A (en) * | 2016-08-11 | 2016-12-07 | 苏州柯创电子材料有限公司 | Composite bed mylar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20160830 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |