CN207375990U - A kind of novel environment friendly pre-coating film - Google Patents
A kind of novel environment friendly pre-coating film Download PDFInfo
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- CN207375990U CN207375990U CN201721148315.6U CN201721148315U CN207375990U CN 207375990 U CN207375990 U CN 207375990U CN 201721148315 U CN201721148315 U CN 201721148315U CN 207375990 U CN207375990 U CN 207375990U
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Abstract
The utility model discloses a kind of novel environment friendly pre-coating films.The novel environment friendly pre-coating film includes, surface layer, the first adhesive layer, interlayer, the second adhesive layer and the hot melt adhesive layer set gradually from top to bottom；The surface layer, the first adhesive layer, interlayer, the second adhesive layer and hot melt adhesive layer are by polypropylene and ethylene-vinyl acetate copolymer coextrusion casting film forming.The utility model uses the tape casting film processed, four layer polypropylenes and one layer of ethylene-vinyl acetate copolymer are disposably coextruded to generation polypropylene pre-membrane by casting technique, without applying hot melt adhesives layer, silane coupling agent is more not required, can be compound with printed matter hot pressing, reduce production cost, production efficiency improves, applied to printed matter overlay film field, common BOPP pre-coating films on the market can be replaced to a certain extent.Meanwhile casting technique can improve the elongation at break of film, avoid the printed matter after common BOPP products overlay film when being die cut machine-shaping, be also easy to produce skinning even chip the problem of.
Description
Technical field
The utility model is related to technical field of material chemistry more particularly to a kind of novel environment friendly pre-coating films.
Background technology
Overlay film refers to a kind of paper unification formed in the laminating layer of plastic film of paper printed matter surface laminating machine
The processing technology of product.Precoating membrane process refers to that surface is coated with the plastic film of hot melt adhesive, is directly used by way of hot pressing
It is processed in the overlay film of printed matter.Compared with traditional i.e. painting type film, pre-coating film has simple for process, and solvent-free pollution is not produced
The advantages that raw harmful VOC emission, it is widely used on the paper printing matters such as all kinds of packing boxes, packaging bag, book cover.
But most pre-coating films, it is that one layer of second is applied by expressing technique on the basis of BOPP original films such as BOPP pre-coating films
Alkene-acetate ethylene copolymer (EVA) raw material and formed.Because the bonding intensity between BOPP and EVA is poor, pre-coating film produced
It needs to apply one layer of silane coupling agent containing organic solvent on BOPP surfaces in journey to improve the fastness between EVA and BOPP.In pre-coating film
With printed matter heating it is compound after, silane coupling agent can be precipitated and film surface is polluted, and influence the brightness of pre-coating film.Coat silane coupling agent
Pre-coating film process energy consumption can also be increased, be difficult to control processing technology.
In addition, BOPP originals film causes its elongation at break low in process of production due to stretch processes, therefore right
When printed matter after overlay film carries out cross cutting machine-shaping, be also easy to produce skinning even chip the problem of.And the utility model will be related to
A kind of processing technology and product of novel environment friendly pre-coating film.The environmental protection pre-coating film will be applied to printed matter overlay film field, can be certain
Common BOPP pre-coating films on the market are replaced in degree.
The Chinese patent of Application No. 201210340018.7 discloses the BOPP pre-coating films and its system of a kind of no silane coupling agent
Method is made, the hot melt adhesive layer (1.5-4 μm of thickness) directly hot pressing is combined to the bidirectional stretching polypropylene film (thickness
12-18 μm) functional layer on.It forms BOPP pre-coating films and without silane coupling agent, but needs subsequent hot pressing combination process.
The Chinese patent of Application No. 201511008801.3 disclose a kind of biaxial tension polypropylene precoating film base material and
Its preparation method.Its base material is by surface layer polypropylene layer, and sandwich layer polypropylene layer and lower floor's ethylene-vinyl acetate resin layer are through co-extrusion
Go out and be prepared with biaxial tension.If wanting to produce pre-coating film, this base material is still needed to be coated with EVA hot-melt adhesive, simply no longer needed
Silane coupling agent.
The Chinese patent of Application No. 200910179981.X, which discloses a kind of packaging field that is used for, has barrier property
Multi-layer co-extruded plastics film, the EVA layer of one layer less than 5 μm of lamination on multi-layer co-extruded film original olefin layer so that film has
There is heat sealability.
The Chinese patent of Application No. 200910062917.3 discloses a kind of ultra-low temperature heat sealing polypropylene casting film, heat
The important materials of sealing are polypropylene random copolymer and polyolefin elastomer, and sandwich layer and corona layer are mainly polypropylene.
It needs to apply one layer of silane coupling agent containing organic solvent on BOPP surfaces in current BOPP pre-coating film production processes to carry
Fastness between high EVA and BOPP.After pre-coating film and printed matter heating are compound, silane coupling agent can be precipitated and cause dirt to film surface
Dye, and influence the brightness of pre-coating film.Coating silane coupling agent can also increase pre-coating film process energy consumption, be difficult to control processing technology.
Polypropylene film is using double stretching technique, and product film uneven thickness, elongation at break is low, subsequent painting
Cloth technique can increase production cost.Current cast polypropylene film main application fields are the packagings such as laminating film internal layer material
Field is not applied in printed matter overlay film field.
Therefore, the prior art is defective, it is necessary to improve.
Utility model content
Technical problem to be solved in the utility model is：Offer one kind evenly, is broken without priming coat, film thickness
Elongation higher, production cost are lower, can be applied to printed matter overlay film field, to a certain extent instead of common BOPP on the market
The novel environment friendly pre-coating film of pre-coating film.
The technical solution of the utility model is as follows：A kind of novel environment friendly pre-coating film, it is characterised in that：Order is wrapped from top to bottom
It includes：Surface layer, the first adhesive layer, interlayer, the second adhesive layer and hot melt adhesive layer；Wherein, the surface layer, the first adhesive layer, centre
Layer, the second adhesive layer and hot melt adhesive layer are integrally squeezed out by die head stretch respectively, and pass through first adhesive layer and described the
By the surface layer, the interlayer, the hot melt adhesive layer, bonding forms two adhesive linkages respectively.
Applied to each above-mentioned technical proposal, the skin depth is 3-6 μm；First adhesive layer, the second adhesive layer
Thickness be 1.5-3 μm；The thickness in the interlayer is 6-12 μm；The thickness of the hot melt adhesive layer is 3-6 μm.
Applied to each above-mentioned technical proposal, the surface on the surface layer is equipped with several protrusions or different the recessed of shape that relax
It is convex.
Applied to each above-mentioned technical proposal, the surface on the surface layer is additionally provided with a smooth layer.
Applied to each above-mentioned technical proposal, first adhesive layer and second adhesive layer are identical for material structure
Adhesive linkage.
Applied to each above-mentioned technical proposal, the surface layer is made of extrusion grade polypropylene, slipping agent and antiblocking agent；
Wherein, the polyacrylic mass content of extrusion grade is 95-97wt%, and the mass content of slipping agent is 0.1-0.2wt%, and surplus is anti-
Adhesion agent.First adhesive layer, the second adhesive layer are made of extrusion grade polypropylene, spinning grade polypropylene and antistatic agent；
Wherein, the polyacrylic mass content of extrusion grade is 83-89wt%, and the polyacrylic mass content of spinning-grade is 10-15%, and surplus is
Antistatic agent.The interlayer is made of extrusion grade polypropylene and Stiffening agent；Wherein, the polyacrylic mass content of extrusion grade is
98-99wt%, surplus are Stiffening agent.The hot melt adhesive layer is by ethylene-vinyl acetate EVA mixtures and ethylene acrylic
Copolymer EAA is mixed；Wherein, the mass content of ethylene-vinyl acetate EVA mixtures is 92%-95%, and surplus is
Ethylene acrylic acid co polymer EAA.
Applied to each above-mentioned technical proposal, the slipping agent can be oleamide or erucyl amide；It is also, described anti-stick
Even agent is composed of one or more kinds of arbitrary proportions of silica, calcium carbonate or PMMA microsphere.
Applied to each above-mentioned technical proposal, the antistatic agent can be by ethoxylated fatty amine, quarternary ammonium salt compound, fat
One or both of fat acid fat, curing carbaminate any of the above ratio is composed.
Applied to each above-mentioned technical proposal, the matter of contained vinyl acetate in the ethylene-vinyl acetate EVA mixtures
Amount content is 25-28wt%, melt index 3.0-5.0g/min.
Using the above program, the utility model uses the tape casting film processed, by four layer polypropylenes and one layer of ethyl vinyl acetate
Ethylene copolymer is disposably coextruded polypropylene pre-membrane of the generation thickness for (15-25) μm by casting technique, without applying again
Cloth hot melt adhesive layer, is more not required silane coupling agent, so that it may and it is directly compound with printed matter progress hot pressing, production cost is greatly reduced, is carried
High production efficiency.For the tape casting compared with double stretching method, equipment investment is few, and floor space is small, and film product thickness is uniform, breaks
Split elongation height.Since its film production is using casting technique, the elongation at break of film is high, therefore avoids common
Printed matter after BOPP product overlay films when being die cut machine-shaping, be also easy to produce skinning even chip the problem of.
Description of the drawings
Fig. 1 is the structure diagram of pre-coating film in the utility model；
Fig. 2 is the schematic diagram of the preparation method of pre-coating film in the utility model.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Present embodiments provide a kind of manufacturing method of novel environment friendly pre-coating film and using pre- made from the manufacturing method
Film.
See Fig. 1, the novel environment friendly pre-coating film of the utility model embodiment goes out casting films for five-layer co-squeezing, including from top to bottom
Surface layer 1, the first adhesive layer 2, interlayer 3, the second adhesive layer 4 and the hot melt adhesive layer 5 set gradually；Wherein, surface layer 1, first is viscous
It ties layer 2, interlayer 3, the second adhesive layer 4 and hot melt adhesive layer 5 and stretching is integrally squeezed out by die head respectively, and it is viscous to pass through described first
Bonding forms respectively by the surface layer 1, the interlayer 3, the hot melt adhesive layer 5 for knot layer 2 and second adhesive linkage 4.Specifically
For, surface layer 1 is made of extrusion grade polypropylene, slipping agent and antiblocking agent；Wherein, the polyacrylic mass fraction of extrusion grade is
95-97wt%, the mass fraction of antiblocking agent is 3-5wt%, and the mass fraction of slipping agent is 0.1-0.2wt%.Wherein, it is anti-stick
Even agent is composed of one or more kinds of arbitrary proportions of silica, calcium carbonate or PMMA microballoons.The work of anti-blocking agent
With being bumps that many protrusions or different relaxation shapes are formed on finished films surface so that film surface has certain coarse
Degree when film, which is stacked or rolled up, to be put together, can allow between film layer and retain a certain amount of air, so as to reduce having between film
Contact area is imitated, so as to have the function that prevent film blocking.And slipping agent can be oleamide or erucyl amide.It is smooth
The effect of agent is to be dispersed in by melting extrusion in film, finally moves to film surface in the production and use process,
Smooth layer is formed, lowers the coefficient of friction of film surface, is allowed to not mutual adhesion, separately unreels and cut more smoothly, and is had
Good opening performance.
First adhesive layer 2, the second adhesive layer 4 are made of extrusion grade polypropylene, spinning grade polypropylene and antistatic agent；Its
In, the polyacrylic mass fraction of extrusion grade is 83-89wt%, and the polyacrylic mass fraction of spinning-grade is 10-15%, and surplus is anti-
Electrostatic agent.Antistatic agent is by one in ethoxylated fatty amine, quarternary ammonium salt compound, fatty acid ester, curing carbaminate
Kind or two or more arbitrary proportions be composed.Antistatic agent can eliminate film in the production and use process because of the institute that rubs
The electrostatic of generation.Antistatic agent is the stronger surfactant of migration, can be moved in film surface layer over time；
Spinning grade polypropylene can increase the first adhesive layer, the bond effect of the second adhesive layer and other layers.
Interlayer 3 is made of extrusion grade polypropylene and Stiffening agent；Wherein, the polyacrylic mass fraction of extrusion grade is 98-
99wt%, surplus are Stiffening agent.Stiffening agent can improve the deflection and rigidity of film.
Finally, hot melt adhesive layer 5 be by ethylene-vinyl acetate EVA mixtures and ethylene acrylic acid co polymer EAA mixing and
Into；Wherein, the mass fraction of ethylene-vinyl acetate EVA mixtures is 92%-95%, and surplus is ethylene acrylic acid co polymer
EAA.The content of vinyl acetate is 25-28wt%, melt index 3.0-5.0g/min in EVA.Hot melt adhesive layer is being heated and added
In the state of pressure, but film is adjacent to bonding with printed matter surface.
Preferably, 1 thickness of surface layer is 3-6 μm；First adhesive layer 2, the thickness of the second adhesive layer 4 are
1.5-3μm；The thickness in the interlayer 3 is 6-12 μm；The thickness of the hot melt adhesive layer 5 is 3-6 μm.
The novel environment friendly pre-coating film of the utility model embodiment is using polypropylene PP and ethylene-vinyl acetate copolymer
The method that EVA is disposably coextruded curtain coating forms five-layer structure.Specifically the manufacturing method includes the following steps：
First by above-mentioned surface layer 1, i.e. A layers, the first adhesive layer 2, i.e. B layers, interlayer 3, i.e. C layers, the second adhesive layer 4, i.e.,
D layers and hot melt adhesive layer 5, i.e. E layers of raw material are put into respectively in four single screw rods, 1. the diameter of four single screw rods is respectively
70mm、②90mm、③150mm、④90mm.(D layers) of wherein the first adhesive layer (B layers) and the second adhesive layer use same original
Material, same screw rod by the distribution of the distributor in casting machine die head, are allowed to the both sides up and down for being located at interlayer (C layers) respectively,
See Fig. 2.Wherein, casting head is T-shaped mould head, and A to E layers is passed through T-shaped mould head simultaneously, is then determined by extrusion, stretching, cooling
Type, extexine sided corona treatment, deburring, you can obtain upper surface tension not less than 38mN/m, lower surface has hot melt adhesive layer
Novel environment friendly pre-coating film.
The utility model uses the tape casting film processed as a result, by four layer polypropylenes and one layer of ethene-vinyl acetate copolymerization
Object is disposably coextruded the polypropylene pre-membrane that generation thickness is 15-25 μm by casting technique, without being coated hot melt adhesive layer,
Silane coupling agent is more not required, so that it may it is directly compound with printed matter progress hot pressing, production cost is greatly reduced, improves production effect
Rate will be applied to printed matter overlay film field, can replace common BOPP pre-coating films on the market to a certain extent.In addition, curtain coating
Method is compared with double stretching method, and equipment investment is few, and floor space is small, and film product thickness is uniform, and elongation at break is high.Due to it
For film production using casting technique, the elongation at break of film is high, therefore avoids the print after common BOPP products overlay film
Brush product easily lead to the problem of skinning even chip when being die cut processing.
It is specific embodiment below：
Example 1：
According to parts by weight：97 parts of grade polypropylene (RP320N Basels), antiblocking agent (silicon dioxide microsphere, 1-2 will be squeezed out
μm) 3 parts, it is 1. interior that 0.1 part of mixing of slipping agent (oleamide) is put into single screw rod；Grade polypropylene (RP320N Basels) 88 will be squeezed out
2. part, 10 parts of spinning grade polypropylene (HM562N Basels) and 2 parts of mixing of antistatic agent (quarternary ammonium salt compound) are put into single screw rod
It is interior；Grade polypropylene 99 parts of (RP320N Basels) will be squeezed out and mix that be put into single screw rod 3. interior with Stiffening agent (NA11 Asahi Chemical Industries)；It will
7 parts of 93 parts of EVA (28-03 Ahs Kerma (unit of kinetic energy)) and EAA (6100 Tao Shi) mixes that be put into single screw rod 4. interior.
Wherein, single screw rod 1., single screw rod 2., each area's temperature in one to seven area of single screw rod 3. be respectively： 180/190/
195/200/210/215/220℃.Each area's temperature in one to seven area of single screw rod 4. is respectively： 170/175/180/190/
200/205/210℃.Temperature at T-shaped mould head is 220 DEG C.Five layer films are compound at T pattern heads, and drawn, cooling are fixed
Type, the processes such as extexine sided corona treatment, deburring, it is the cast polypropylene pre-coating film that 15 μm of width are 3.4m to finally obtain thickness
(light film), wherein A to E layers of thickness are respectively：3 μm, 1.5 μm, 6 μm, 1.5 μm and 3 μm.Film upper surface tension is
38mN/m。
Example 2：
According to parts by weight：93 parts of grade polypropylene (4342C3 Exxons), organic matting agent polystyrene (AT-100 will be squeezed out
Louis) 4 parts, 3 parts of antiblocking agent (calcium carbonate microspheres, 0.5-2 μm), 0.1 part of mixing of slipping agent (erucyl amide) is put into single spiral shell
Bar is 1. interior；83 parts of grade polypropylene (4342C3 Exxons), 15 parts of spinning grade polypropylene (H19G-01 Ineos) will be squeezed out and resisted
It is 2. interior that 2 parts of mixing of electrostatic agent (ethoxylated fatty amine) are put into single screw rod；99 parts of grade polypropylene (4342C3 Exxons) will be squeezed out
Mix that be put into single screw rod 3. interior with Stiffening agent (3262A high Son)；By 95 parts of EVA (28-03 Ahs Kerma (unit of kinetic energy)) and EAA (5050 Tao Shi) 5
It is 4. interior that part mixing is put into single screw rod.
Wherein, single screw rod 1., single screw rod 2., each area's temperature in one to seven area of single screw rod 3. be respectively： 185/195/
200/205/210/215/220℃.Each area's temperature in single screw rod 4. one to seven area is respectively： 175/180/185/190/200/
205/210℃.Temperature at T-shaped mould head is 215 DEG C.Five layer films are compound at T pattern heads, drawn, cooling and shaping, outer
The processes such as surface layer sided corona treatment, deburring, it is the cast polypropylene pre-coating film (mute film) that 20 μm of width are 3.4m to finally obtain thickness,
Wherein A to E layers of thickness is respectively：4 μm, 2 μm, 8 μm, 2 μm and 4 μm.Film upper surface tension is 40mN/m.
By example 1, example 2 is compared with conventional common BOPP light film pre-coating films, the performance of the mute film pre-coating films of BOPP, such as
Shown in table 1.
Table 1：
As it can be seen from table 1 example 1 and 2 and commercially available common BOPP light film pre-coating film, BOPP is mute, and film pre-coating film compares,
The elongation at break of vertical and horizontal, which has, significantly to be promoted, therefore overcomes common BOPP film, due to elongation at break
During low and printed matter after overlay film cross cutting machine-shaping, be also easy to produce skinning even chip the problem of.
On the other hand, the commercially available common BOPP light film pre-coating film of the tensile strength ratio of example 1 and 2, the mute film pre-coating films of BOPP
It is low, this is because caused by being cast processing technology in itself.But in actual continuous paper film covering production process, example 1 and 2
Film there is no because the drafting force of equipment generates uncontrollable plastic deformation, therefore after its satisfaction the processing of road overlay film quality
It is required that.
After example 1 and 2 and printed matter are compound, through burn-in test (condition 1：54 DEG C of temperature, relative humidity 88%, 48 it is small when；
Condition 2：- 20 DEG C of temperature, 24 it is small when), blistering and paper membrane aliquation phenomenon do not occur for product after overlay film, and post-press finishing technique is as scalded
Gold, local UV etc. can carry out on the surface after overlay film, meet common process requirement.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in the guarantor of the utility model
Within the scope of shield.
Claims (5)
1. a kind of novel environment friendly pre-coating film, it is characterised in that：Sequentially include from top to bottom：Surface layer, the first adhesive layer, interlayer,
Second adhesive layer and hot melt adhesive layer；
Wherein, the surface layer, the first adhesive layer, interlayer, the second adhesive layer and hot melt adhesive layer are integrally squeezed out respectively by die head
It stretches, and passes through first adhesive layer and second adhesive linkage by the surface layer, the interlayer, the hot melt adhesive layer point
It Nian Jie not form.
2. novel environment friendly pre-coating film according to claim 1, it is characterised in that：The skin depth is 3-6 μm；Described
One adhesive layer, the thickness of the second adhesive layer are 1.5-3 μm；The thickness in the interlayer is 6-12 μm；The hot melt adhesive layer
Thickness is 3-6 μm.
3. novel environment friendly pre-coating film according to claim 1, it is characterised in that：The surface on the surface layer is equipped with several dash forward
It rises or the bumps of different relaxation shape.
4. novel environment friendly pre-coating film according to claim 1, it is characterised in that：It is refreshing that the surface on the surface layer is additionally provided with one
Slip layer.
5. novel environment friendly pre-coating film according to claim 1, it is characterised in that：First adhesive layer and described second glues
Layer is tied as the identical adhesive linkage of material structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721148315.6U CN207375990U (en) | 2017-09-07 | 2017-09-07 | A kind of novel environment friendly pre-coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721148315.6U CN207375990U (en) | 2017-09-07 | 2017-09-07 | A kind of novel environment friendly pre-coating film |
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| Publication Number | Publication Date |
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| CN207375990U true CN207375990U (en) | 2018-05-18 |
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| CN201721148315.6U Expired - Fee Related CN207375990U (en) | 2017-09-07 | 2017-09-07 | A kind of novel environment friendly pre-coating film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593484A (en) * | 2019-01-31 | 2019-04-09 | 口碑(上海)信息技术有限公司 | Paster of surface anti sticking and the preparation method and application thereof |
-
2017
- 2017-09-07 CN CN201721148315.6U patent/CN207375990U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593484A (en) * | 2019-01-31 | 2019-04-09 | 口碑(上海)信息技术有限公司 | Paster of surface anti sticking and the preparation method and application thereof |
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