CN108611012A - It covers iron film and preparation method thereof, cover the canned food of iron film using this - Google Patents
It covers iron film and preparation method thereof, cover the canned food of iron film using this Download PDFInfo
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- CN108611012A CN108611012A CN201710042997.0A CN201710042997A CN108611012A CN 108611012 A CN108611012 A CN 108611012A CN 201710042997 A CN201710042997 A CN 201710042997A CN 108611012 A CN108611012 A CN 108611012A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
- C09J167/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D2565/38—Packaging materials of special type or form
- B65D2565/381—Details of packaging materials of special type or form
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/006—Presence of polysiloxane in the substrate
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention provides cover iron film and preparation method thereof, cover the canned food of iron film using this, wherein covering iron film includes：Adhesive layer, base and the silicone powder modified layer stacked gradually；Silicone powder modified layer is composed of the following raw materials in parts by weight：100 parts of PET polyester slices, 7~20 parts of silicone powder master batch；The range of the confficient of static friction on the surface of silicone powder modified layer is 0.12~0.20 μ s.Canned food includes：Iron film is covered as above-mentioned and metallic plate progress is compound, canned food is made after cutting, the silicone powder modified layer for covering iron film is exposed to the inner surface of canned food.The canned food for covering iron film and preparation method thereof, covering iron film using this of the present invention has low-surface-energy characteristic, is bonded with tank skin after capable of effectively preventing its high temperature sterilization cooling after food encapsulation.
Description
Technical field
The present invention relates to metal film coated technical fields, specifically, being related to covering iron film and preparation method thereof, covering iron using this
The canned food of film.
Background technology
In made of metal tank industry, can body material is generally taggers tin, Tinfree Steelor TFS or chromium plating thin aluminum sheet, in order to
It protects metal not corroded, usually smears one layer of thermohardening lacquer in the outer surface of tank metal material processed, however coating cured
The organic solvent volatilization of pollution environment is had in journey, product is difficult to meet increasingly strict food security demand, low production efficiency
Under.
Later, modified single-layer bidirectional oriented polyester film (BOPET film) heat was melted pressure by people by metal heating plate
The mode on its surface is closed, solves the problems, such as organic solvent environmental pollution, has obtained a kind of completely new food and drink packaging
Material --- film-covered iron.
Canned food, the Beverages and Canned Food made using the film-covered iron of two-sided overlay film, with better food security advantage.
Since film-covered iron itself is without using epoxy coating, there is no harmful substances, the PET of film-covered iron such as melamine, bisphenol-A are thin
Film has excellent barrier property, can effectively prevent food and is contacted with metal tank body.As the new lover of high-end tinned food packaging.
General PET film (polyethylene terephthalate, chemical formula COC6H4COOCH2CH2O, English：Polyethylene
Terephthalate, abbreviation PET) it is usually high surface energy, such as the range of the confficient of static friction of common PET film surface is 0.26
(polytetrafluoroethylene (PTFE), Polytetrafluoroethylene are abbreviated as PTFE, commonly referred to as~0.34 μ s or PTFE film face
" non-sticking lining " or " material easy to clean.) the range of confficient of static friction be≤0.1 μ s, confficient of static friction is bigger, then easier
Situations such as being adhered, bonding.
But in the higher semifluid of some concentration or solid food, such as mixed congee, jam fruit, canned meat.It is opening
After opening this kind of can, since food and tank skin bond, taking out food becomes very inconvenient, its food is taken out and carried out by some need
Secondary operation needs to take out pork luncheon meat entirety out of can, keeps original shape such as the secondary cooking processing that pork luncheon meat is eaten
Shape cooks processing again after cutting.But since the viscosity of pork luncheon meat is relatively strong, it is not easy to out of can, it is assumed that use such as spoon
Tool is by its destructive taking-up.Difficult in the presence of taking out, the shape of food is destroyed.It is not easy to secondary cooking processing.Food
The reason of product difficulty is taken out is that food is encapsulated into can, and food occurs glutinous viscous and is not easily taken out with tank skin after heating sterilization is cooling.
Invention content
For the problems of the prior art, the purpose of the present invention is to provide cover iron film and preparation method thereof, covered using this
The canned food of iron film, the present invention have low-surface-energy characteristic, can effectively prevent its high temperature sterilization after food encapsulation cold
But it is bonded with tank skin after.
The embodiment of the present invention provides one kind and covering iron film, including：Adhesive layer, base and the silicone powder stacked gradually is modified
Layer；
The silicone powder modified layer is composed of the following raw materials in parts by weight：100 parts of PET polyester slices, silicone powder master batch 7~
20 parts；
The range of the confficient of static friction on the surface of the silicone powder modified layer is 0.12~0.20 μ s.
Preferably, the silicone powder master batch is composed of the following raw materials in parts by weight：100 parts of PET polyester slices, silicone powder 15
Part.
Preferably, the fusing point of the PET polyester slices is 250 DEG C~265 DEG C.
Preferably, the adhesive layer is low-melting point PET, and the fusing point of the low-melting point PET is 190 DEG C~230 DEG C, described viscous
The thickness for closing layer is not less than 2 μm.
Preferably, the thickness for covering iron film is 15~40 μm.
Preferably, the thickness of the adhesive layer covers the 5%~80% of iron film thickness to be described, and the thickness of the base is institute
It states and covers the 5%~90% of iron film thickness, the thickness of the silicone powder modified layer covers the 5%~80% of iron film thickness to be described.
Preferably, the iron film that covers once squeezes out curtain coating system by the film-forming apparatus of the non-stretching tape-cast polyester film of three-decker
.
The embodiment of the present invention also provides a kind of preparation method for covering iron film, includes the following steps：
(1) raw material of following parts by weight is weighed：100 parts of PET polyester slices, 15 parts of silicone powder；Above-mentioned raw materials are heated
The first polymer melt is obtained to 160 DEG C~320 DEG C, the first polymer melt is sent by parallel double-screw extruder, pelletizing, is done
It is dry to obtain silicone powder master batch.The raw material of following parts by weight is weighed again：100 parts of PET polyester slices, 7~20 parts of silicone powder master batch
Heating is made and obtains the second polymer melt, the second polymer melt is stretched to obtain silicone powder modified layer, the silicone powder modified layer
The range of confficient of static friction on surface be 0.12~0.20 μ s.
(2) adhesive layer and base are obtained by coextrusion casting technique.
(3) by silicone powder modified layer, adhesive layer and base by the film-forming apparatus of the non-stretching tape-cast polyester film of three-decker
Primary extrusion curtain coating carries out compound.
Preferably, the step (1) and the sequence of step (2) are exchanged with each other.
The embodiment of the present invention also provides a kind of canned food, including：The iron film that covers as above-mentioned carries out compound, warp with metallic plate
Canned food is made after cutting out, the silicone powder modified layer for covering iron film is exposed to the inner surface of the canned food.
The canned food for covering iron film and preparation method thereof, covering iron film using this of the present invention has low-surface-energy characteristic, energy
It is bonded with tank skin after effectively preventing its high temperature sterilization cooling after food encapsulation.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon.
Fig. 1 is the diagrammatic cross-section for covering iron film of the present invention.And
Fig. 2 is the partial cutaway schematic of the canned food of the present invention.
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure
Icon note indicates same or similar structure, thus will omit repetition thereof.
Fig. 1 is the diagrammatic cross-section for covering iron film of the present invention.As shown in Figure 1, the iron film that covers of the present invention includes：It stacks gradually
Adhesive layer 1, base 2 and silicone powder modified layer 3.Silicone powder modified layer 3 is composed of the following raw materials in parts by weight：PET polyester
100 parts of slice, 7~20 parts of silicone powder master batch；The range of the confficient of static friction on the surface of silicone powder modified layer 3 is 0.12~0.20
μs.By the film-forming apparatus of the non-stretching tape-cast polyester film of three-decker once to squeeze out curtain coating obtained for the iron film that covers of the present invention.With it is existing
In technology the range of the confficient of static friction of the film surface of PET film be 0.26~0.34 μ s, PTFE film face confficient of static friction
Range is that 0.26~0.34 μ s are compared, the present invention in silicone powder modified layer 3 surface confficient of static friction be significantly less than it is existing
The confficient of static friction of the film surface of technology.Confficient of static friction is smaller, then situations such as being less susceptible to be adhered, bond, so, this hair
Situations such as silicone powder modified layer 3 in bright can effectively act as that food is prevented to be adhered, bond.
Silicone powder master batch in the present invention is composed of the following raw materials in parts by weight：100 parts of PET polyester slices, silicone powder 15
Part.Preferably, the fusing point of PET polyester slices is 250 DEG C~265 DEG C.
Adhesive layer 1 is low-melting point PET, and the fusing point of low-melting point PET is 190 DEG C~230 DEG C, and the thickness of adhesive layer 1 is not less than 2
μm。
The thickness for covering iron film of the present invention is 15~40 μm.
The thickness of adhesive layer 1 is cover iron film thickness 5%~80%, such as 10%, 20%, 30%, 40%, 50%, 60%,
Or 70%.
The thickness of base 2 is cover iron film thickness 5%~90%, such as 10%, 20%, 30%, 40%, 50%, 60% or
70%.
The thickness of silicone powder modified layer 3 is cover iron film thickness 5%~80%, such as 10%, 20%, 30%, 40%,
50%, 60% or 70%.
Wherein, the material of adhesive layer 1 is PET, and but not limited to this.The thickness range of adhesive layer 1 is to be not less than 2 μm.This
PET in invention refers to polyethylene terephthalate, chemical formula COC6H4COOCH2CH2O.(English：
Polyethylene terephthalate, abbreviation PET), it is exchanged with glycol ester by dimethyl terephthalate (DMT) or with to benzene
Dioctyl phthalate first synthesizes bishydroxyethyl terephthalate with ethylene glycol esterification, then carries out polycondensation reaction again and is made.
The material of base 2 is modified PET or PP, and but not limited to this.Modified PET in the present invention refers to thermoplastic polyester
It is higher melting-point a kind of crystalline polymer, there is excellent mechanical property, preferable elasticity, wearability and impact resistance,
Water absorption rate is low, good dimension stability, and condition of molding is good, and the creep resistance under load is good.PP in the present invention refers to gathering
A kind of thermoplastic resin of prepared by propylene (Polypropylene) is by propylene polymerization.The thickness range of base 2 is 1~3 μ
m。
The present invention also provides a kind of preparation methods for covering iron film, include the following steps：
(1) raw material of following parts by weight is weighed：100 parts of PET polyester slices, 15 parts of silicone powder；Above-mentioned raw materials are heated
The first polymer melt is obtained to 160 DEG C~320 DEG C, the first polymer melt is sent by parallel double-screw extruder, pelletizing, is done
It is dry to obtain silicone powder master batch.
Weigh the raw material of following parts by weight：100 parts of PET polyester slices, 7~20 parts of silicone powder master batch are made heating and obtain
Second polymer melt stretches the second polymer melt to obtain silicone powder modified layer, the static friction system on the surface of silicone powder modified layer
Several ranges is 0.12~0.20 μ s.
(2) adhesive layer and base are obtained by coextrusion casting technique.
(3) by silicone powder modified layer, adhesive layer and base by the film-forming apparatus of the non-stretching tape-cast polyester film of three-decker
Primary extrusion curtain coating carries out compound.
In a preferred embodiment, step (1) and the sequence of step (2) are exchanged with each other.
Fig. 2 is the partial cutaway schematic of the canned food of the present invention.As shown in Fig. 2, the present invention also provides a kind of foods
Product can, including：As it is above-mentioned cover iron film carried out with metallic plate 4 it is compound.The present invention the iron film that covers include：The bonding stacked gradually
Layer 1, base 2 and silicone powder modified layer 3.Silicone powder modified layer 3 is composed of the following raw materials in parts by weight：PET polyester slices 100
Part, 7~20 parts of silicone powder master batch；The range of the confficient of static friction on the surface of silicone powder modified layer 3 is 0.12~0.20 μ s.This hair
It is bright cover iron film curtain coating once squeezed out by the film-forming apparatus of the non-stretching tape-cast polyester film of three-decker be made.With in the prior art
The range of the confficient of static friction of the film surface of PET film be 0.26~0.34 μ s, PTFE film face the range of confficient of static friction be
0.26~0.34 μ s are compared, and the confficient of static friction on the surface of the silicone powder modified layer 3 in the present invention is significantly less than the prior art
The confficient of static friction of film surface.Confficient of static friction is smaller, then situations such as being less susceptible to be adhered, bond, so, in the present invention
Silicone powder modified layer 3 can effectively act as situations such as preventing food to be adhered, bond.
By the present invention cover iron film and metallic plate 4 it is compound after, canned food is made after cutting, covers the silicone powder of iron film
Modified layer 3 is exposed to the inner surface of canned food.When in canned food store food when, food directly with silicone powder modified layer 3
Contact, since the range of the confficient of static friction on the surface of silicone powder modified layer 3 is 0.12~0.20 μ s, food is modified with silicone powder
It is less likely to occur between layer 3 glutinous viscous.Food is easily detached with silicone powder modified layer 3, even viscosity is opposite
Stronger pork luncheon meat can also be easy to take out out of can, be processed convenient for the secondary cooking of food.
In conclusion the canned food for covering iron film and preparation method thereof, covering iron film using this of the present invention has low surface
Energy characteristic bonds after capable of effectively preventing its high temperature sterilization cooling after food encapsulation with tank skin.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's
Protection domain.
Claims (10)
1. one kind covering iron film, which is characterized in that including：Adhesive layer (1), base (2) and the silicone powder modified layer stacked gradually
(3)；
The silicone powder modified layer (3) is composed of the following raw materials in parts by weight：100 parts of PET polyester slices, silicone powder master batch 7~
20 parts；
The range of the confficient of static friction on the surface of the silicone powder modified layer (3) is 0.12~0.20 μ s.
2. according to claim 1 cover iron film, it is characterised in that：The silicone powder master batch by following parts by weight raw material group
At：100 parts of PET polyester slices, 15 parts of silicone powder.
3. according to claim 1 or 2 cover iron film, it is characterised in that：The fusing point of the PET polyester slices be 250 DEG C~
265℃。
4. according to claim 1 cover iron film, it is characterised in that：The adhesive layer (1) is low-melting point PET, the eutectic
The fusing point of point PET is 190 DEG C~230 DEG C, and the thickness of the adhesive layer (1) is not less than 2 μm.
5. according to claim 1 cover iron film, which is characterized in that the thickness for covering iron film is 15~40 μm.
6. according to claim 5 cover iron film, which is characterized in that the thickness of the adhesive layer (1) covers iron film thickness to be described
The thickness of the 5%~80% of degree, the base (2) covers the 5%~90% of iron film thickness to be described, the silicone powder modified layer
(3) thickness covers the 5%~80% of iron film thickness described in being.
7. according to claim 1 cover iron film, which is characterized in that the iron film that covers is by the non-stretching curtain coating polyester of three-decker
The film-forming apparatus of film once squeezes out curtain coating and is made.
8. a kind of preparation method for covering iron film, which is characterized in that include the following steps：
(1) raw material of following parts by weight is weighed：100 parts of PET polyester slices, 15 parts of silicone powder；Above-mentioned raw materials are heated to 160
DEG C~320 DEG C obtain the first polymer melt, the first polymer melt is sent by parallel double-screw extruder, is pelletizing, dry
To silicone powder master batch；
Weigh the raw material of following parts by weight：100 parts of PET polyester slices, 7~20 parts of silicone powder master batch are made heating and obtain second
Polymer melt stretches the second polymer melt to obtain silicone powder modified layer, the static friction system on the surface of the silicone powder modified layer
Several ranges is 0.12~0.20 μ s；
(2) adhesive layer and base are obtained by coextrusion casting technique；
(3) silicone powder modified layer, adhesive layer and base is primary by the film-forming apparatus of the non-stretching tape-cast polyester film of three-decker
It is compound to squeeze out curtain coating progress.
9. the preparation method according to claim 8 for covering iron film, which is characterized in that the step (1) is suitable with step (2)
Sequence is exchanged with each other.
10. a kind of canned food, which is characterized in that including：Iron film and gold are covered as claimed in any of claims 1 to 7 in one of claims
It is compound to belong to plate (4) progress, canned food is made after cutting, the silicone powder modified layer (3) for covering iron film is exposed to the food
The inner surface of product can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710042997.0A CN108611012A (en) | 2017-01-19 | 2017-01-19 | It covers iron film and preparation method thereof, cover the canned food of iron film using this |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710042997.0A CN108611012A (en) | 2017-01-19 | 2017-01-19 | It covers iron film and preparation method thereof, cover the canned food of iron film using this |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108611012A true CN108611012A (en) | 2018-10-02 |
Family
ID=63658197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710042997.0A Pending CN108611012A (en) | 2017-01-19 | 2017-01-19 | It covers iron film and preparation method thereof, cover the canned food of iron film using this |
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| CN (1) | CN108611012A (en) |
Citations (6)
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|---|---|---|---|---|
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| CN202895814U (en) * | 2012-08-09 | 2013-04-24 | 海宁市粤海彩印有限公司 | Food package composite film |
| CN103753932A (en) * | 2013-12-27 | 2014-04-30 | 天津万华股份有限公司 | Directly-compoundable low-melting-point polyester thin film preparation method for laminated steel |
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Application publication date: 20181002 |