CN202912882U - Two-way stretch digital precoating film - Google Patents
Two-way stretch digital precoating film Download PDFInfo
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- CN202912882U CN202912882U CN 201220321304 CN201220321304U CN202912882U CN 202912882 U CN202912882 U CN 202912882U CN 201220321304 CN201220321304 CN 201220321304 CN 201220321304 U CN201220321304 U CN 201220321304U CN 202912882 U CN202912882 U CN 202912882U
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Abstract
The utility model discloses a two-way stretch digital precoating film, which comprises a basic material layer and a hot melt adhesive layer compounded with the basic material layer, wherein a middle layer is arranged between the basic material layer and the hot melt adhesive layer; and a priming coat layer and an adhesion promotion layer are compounded in sequence on one surface of the hot melt adhesive layer far away from the basic material layer. The adhesion promotion layer is compounded on one side of the hot melt adhesive layer, adopts a multi-layer copolyester adhesive, can be satisfactorily adhered with a printed product, is especially suitable for application to a digital printed sheet with high silicone oil or wax content, can be permeated into a printing ink layer of the digital printed product and diffused to a paper base material, forms a net-shaped crosslinked structure together with paper fibers, and has ultrahigh adhesive property for the digital printed sheet; and the priming coat layer is arranged between the hot melt adhesive layer and the adhesion promotion layer, so that the adhesion between the adhesion promotion layer and the hot melt adhesive layer is enhanced, and the adhesion promotion layer is firmly adhered with the hot melt adhesive layer.
Description
Technical field
The utility model relates to digital printing product film coating technique field, relates in particular to a kind of two-way stretch digital pre-laminating film for silicone oil, digital printing product that wax content is high.
Background technology
Coating technique is the later stage eighties 20th century to introduce China; because coating technique not only can provide provide protection to printed matter; prolong its work-ing life; can improve simultaneously the appearance effect of printed matter; this technique is popularized in the whole nation rapidly, is widely used on the packings such as books and periodicals, food, tobacco and wine, medicine.
Coating technique is divided into namely film coating technique and pre-coating film coating technique.The coating technique of namely filming be rise in the international sixties to coating technique behind the seal of printed matter, packaged product.But this technique is directly used in the overlay film process and is contained benzene solvent, because the volatilization of toxic substance benzene can and bring very big harm for the producer and user's health to environment, and organic solvent-benzene be inflammable, explosive, security is not high.Quality product also is more difficult to get assurance behind the overlay film, easily forms bubble, makes printed matter surface be vaporific, affects smooth finish, sharpness and the colour vividness of printed matter, and easily causes the problems such as cracking, fold and demoulding.Than namely filming, pre-coating film does not use volatile, inflammable, explosive organic solvent in production and use procedure, do not produce toxic gas, therefore, has effectively improved Working environment, has improved safety performance.Whole overlay film process can be finished in several seconds, and is easy to operate, and pre-coating film progressively improves at the market portion.
Chinese patent literature CN 101705060A discloses a kind of " digital pre-laminating film ", and it is comprised of substrate layer and hot melt adhesive layer, and substrate layer and hot melt adhesive layer are compound in together, and substrate layer is the thin film of biaxial stretching polypropylene or biaxially oriented polyester film; Hot melt adhesive layer is the ethylene-vinyl acetate (EVA) through coupling processing, the mixture of petroleum resin, the weight percent that both account for respectively hot melt adhesive layer is: the ethylene-vinyl acetate (EVA) through coupling processing is 85%～94%, and petroleum resin are 6%～15%.After it is used in digital printing product surface, can make the printed matter surface more level and smooth light that seems, improve the glossiness of printed matter, prolong the work-ing life of product.But the shortcoming of its existence is that the binding strength of printed matter and pre-coating film is inadequate.
The application of pre-coating film can cover a lot of printings, packaging field, but some special field adapts to regard to the pre-coating film that demand has specific function, for digital printing product field, owing to containing silicone oil or wax in the printing ink that a lot of printed matter surfaces use, the inorganics component content of silicone oil and wax is large, the hot melt adhesive that is difficult in common pre-coating film during overlay film is combined, the binding strength of printed matter and film is inadequate behind the overlay film, can cause a lot of mass defects, as: the rolling line behind overlay film, aliquation appears in the embossing place, i.e. film and printed matter phenomenon of phase separation, therefore, must design type material and production method, to adapt to heavy silicone oil or wax slop ink print product overlay film demand.
The utility model content
The purpose of this utility model is to solve the problems of the technologies described above, and a kind of two-way stretch digital pre-laminating film and preparation method thereof is provided, and can make pre-coating film have high-adhesion, so that itself and silicone oil, digital printing product adhesive fastness that wax content is high are high.
For reaching this purpose, the utility model by the following technical solutions:
A kind of two-way stretch digital pre-laminating film comprises substrate layer and the hot melt adhesive layer compound with it, between described substrate layer and the described hot melt adhesive layer middle layer is set, on the described hot melt adhesive layer away from the one side of substrate layer sequentially combined bottom coating and adhesion promotion layer.Adhesion promotion layer can follow silicone oil, digital printing product that wax content is high that good cohesive force is arranged, and it can go deep into paper fibre, realizes and the paper mortise; In order to improve the cohesiveness between adhesion promotion layer and the hot melt adhesive layer, thereby on the surface of hot melt adhesive layer undercoat is set, with adhesion promotion layer and hot melt adhesive layer mortise.
Further, described substrate layer adopts biaxially oriented film, and described hot melt adhesive layer adopts polyethylene copolymer.
Wherein, biaxially oriented film comprises biaxial stretching polyester (BOPET) film or biaxial tension nylon (BOPA) film or Biaxially oriented polypropylene film (BOPP) (BOPP) film.Biaxial stretching polyester (BOPET) film has following advantage: 1. good mechanical property, and good rigidly, and intensity is high; 2. cold-resistant, excellent heat resistance, the temperature range of adaptation is-70～150 ℃; 3. well block water, choke and fragrance protectiveness; 4. grease resistance and most of solvent, weak acid alkaline liquid.Biaxial tension nylon (BOPA) film is compared with other conventional films, have the advantages such as the transparency is good, glossiness is high, the smell barrier is strong, oil-resisting and heat-resisting is strong, simultaneously because the BOPA film is nontoxic, so become in recent years the active material of food product pack industry, be particularly suitable for freezing, boiling, vacuumize packing.Biaxially oriented polypropylene film (BOPP) (BOPP) film is generally multilayer mutual aid film, be by polypropylene GRANULES after co-extrusion forms sheet material, make through the stretching of both direction in length and breadth again, because stretching molecule is directed, so the physical stability of this film, physical strength, resistance to air loss are better, transparency and glossiness are higher, and tough and hard wear resistant is present most widely used printing film.
Polyethylene copolymer is a kind of solvent, moisture free solid meltability polymkeric substance of not needing, and is solid at normal temperatures, becomes the liquid that has flowability, has certain viscosity after being heated to certain temperature; Hot melt adhesive after the melting is light yellow or colourless, is become to be grouped into by basic resin, tackifier, viscosity modifier and oxidation inhibitor etc.At present, apply level hot melt adhesive product and mainly rely on import, domestic without suitable other product of coating level, there are supply in the Han Hua of Korea S, three magnitude companies.Described hot melt adhesive layer adopts one or several mixtures in ethene-vinyl acetate (EVA) multipolymer, ethylene-propylene acetoacetic ester (EEA) multipolymer, ethylene-acrylic acid (EAA) multipolymer, ethylene-methyl acrylate (EMA) multipolymer, the Low Density Polyethylene (LDPE).
Preferably, the thickness of described substrate layer is 10 μ m～50 μ m, and the thickness of described hot melt adhesive layer is 10 μ m～50 μ m.
Preferred, the thickness of described substrate layer is 12 μ m～30 μ m, and the thickness of described hot melt adhesive layer is 10 μ m～30 μ m.
Further, polymine (PEI) is adopted in described middle layer.
Wherein, polymine (PEI) molecular formula is: (CH
2CH
2NH) n selects the n value according to the molecular-weight average of polymkeric substance in 1000～10000 scope, and there is product-feed in Shanghai DiC Ink Co., Ltd, and our company adopts the imported from America product.
Further, described middle layer employing solid content is 0.4%～1.5% polymine (PEI) aqueous solution, and the thickness in middle layer is 0.01 μ m～0.03 μ m, and it applies dry weight is 0.009g/ ㎡～0.011g/ ㎡.
Further, described undercoat adopts the aqueous surface-treating agent that contains defoamer, and described adhesion promotion layer adopts the organic or inorganic sizing agent that contains defoamer and flow agent.
Further, described undercoat adopts amine surface treatment agent or coupling agent, and it contains 1%～10% defoamer, and the thickness of described undercoat is 0.01 μ m～0.07 μ m, and it applies dry weight is 0.02g/ ㎡～0.05g/ ㎡; Described adhesion promotion layer adopts copolyesters class sizing agent, and contains 2%～10% defoamer, and the flow agent that contains 0.1%～1.5%, and the thickness of described adhesion promotion layer is 0.05 μ m～0.6 μ m, and it applies dry weight is 0.2g/ ㎡～0.6g/ ㎡.
Further, described undercoat adopts the amine surface treatment agent of solid content 0.1%～5%, and it contains 4%～8% defoamer, and the thickness of described undercoat is 0.02 μ m～0.06 μ m, and it applies dry weight is 0.02g/ ㎡～0.04g/ ㎡; Described adhesion promotion layer adopts the copolyesters class sizing agent of solid content 1%～20%, and contain 4%～7% defoamer, and the flow agent that contains 0.5%～1%, the thickness of described adhesion promotion layer is 0.1 μ m～0.5 μ m, it applies dry weight is 0.2g/ ㎡～0.5g/ ㎡.
Preferably, the width of described substrate layer, described middle layer, described hot melt adhesive layer, described undercoat, described adhesion promotion layer is all identical.
With respect to prior art, the beneficial effects of the utility model:
1, the utility model can have good cohesive force with printed matter, and can go deep into paper fibre by in hot melt adhesive layer one side compoiste adhering promoting layer, realizes and the paper mortise; And undercoat is set between hot melt adhesive layer and adhesion promotion layer, and improved the cohesiveness between adhesion promotion layer and the hot melt adhesive layer, realized adhesion promotion layer and hot melt adhesive layer mortise;
2, adhesion promotion layer adopts the multilayer sizing agent, in the permeable printed matter of outermost adhesion promotion layer that contacts with printed matter, and then be diffused into paper substrate, form cross-linked network with paper fibre, especially be fit to be applied to silicone oil, wax content digital printing specimen page heavily, the permeable ink lay that advances the digital printing product of adhesion promotion layer, the logarithmic code printed sheet has the superelevation adhesion properties.Shown in the experimental data following table:
By the data of upper table as can be known the average cohesive force of digital pre-laminating film logarithmic code specimen page of the present utility model to be far longer than common pre-coating film.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one, embodiment two described two-way stretch digital pre-laminating films;
Fig. 2 is the process flow sheet of embodiment one described two-way stretch digital pre-laminating film.
Among the figure:
01, substrate layer; 02, middle layer; 03, hot melt adhesive layer; 04, undercoat; 05, adhesion promotion layer; 1, unreeling machine; 2, corona processor; 3, the first coating pan; 4, the first coating roll; 5, drying channel; 6, cooling roller; 7, ozonizer; 8, forcing machine; 9, nip roller; 10, the second coating pan; 11, the second coating roll; 12, the 3rd coating pan; 13, the 3rd coating roll; 14, winder.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Embodiment one:
As shown in Figure 1 and Figure 2, a kind of two-way stretch digital pre-laminating film comprises substrate layer 01, and the one side of substrate layer is sequentially provided with middle layer 02, hot melt adhesive layer 03, undercoat 04, adhesion promotion layer 05.
Wherein, the width of substrate layer 01, middle layer 02, hot melt adhesive layer 03, undercoat 04, adhesion promotion layer 05 is 1600mm.
The preparation method of the described two-way stretch digital pre-laminating film of the present embodiment comprises the steps:
Step a: substrate layer unreels
Be that 15 μ m Biaxially oriented polypropylene film (BOPP) (BOPP) films are placed on the unreeling machine 1 and unreel by air-expanding shaft with thickness, with its expansion;
Step b: coating middle layer
1., the composite surface of substrate layer Biaxially oriented polypropylene film (BOPP) (BOPP) film carries out corona treatment by corona processor 2, making the dyne value of Biaxially oriented polypropylene film (BOPP) (BOPP) film surface is 36;
2., the first coating roll 4 is evenly coated polymine (PEI) aqueous solution in the first coating pan 3 on the corona treatment surface of Biaxially oriented polypropylene film (BOPP) (BOPP) film;
3., Biaxially oriented polypropylene film (BOPP) (BOPP) film that is coated with polymine (PEI) aqueous solution is dried through drying channel 5, cool off by cooling roller 6 again, the thickness in middle layer is 0.015 μ m after the oven dry, and dry weight is between 0.009g/ ㎡～0.01g/ ㎡;
Step c: composite hot melt glue-line
1., extrude the forcing machine 8 of composite production line and extrude ethene-vinyl acetate (EVA) hot melt adhesive, multi-procedure place at production line is provided with ozonizer 7, producing ozone by ozonizer 7 jets to the curtain coating place of the hot melt adhesive of extruding, the deflector roll of the while production line Biaxially oriented polypropylene film (BOPP) that is compounded with polymine (BOPP) film of drying is delivered to multi-procedure, and pass through nip roller 9 with the hot melt adhesive that is cast to multi-procedure and push combinations, form composite membrane, 6 coolings (temperature is 18 ℃) are processed through cooling roller again, and the thickness of hot melt adhesive layer is 25 μ m;
2., thickness measurement and adjustment: utilize the β ray in short range, to have extremely strong penetrance and come detect thickness with accurate measurement performance, after the measurement with its result feedback to computer, the die gap at the screw speed of computer control forcing machine and die head position is so that obtain the consistent pre-coating film of even thickness.
Steps d: painting bottom coating
1., before the Coating, first Corona Surface Treatment is carried out by corona processor 2 in the hot melt adhesive layer surface, reach hot melt adhesive layer surface dyne value in 36～38 scopes;
2., the second coating roll 11 evenly coats the amine surface treatment agent undercoats in the second coating pan 10 surface of hot melt adhesive, carries out drying and processing by drying channel 5 again, the thickness of undercoat is 0.03 μ m after the oven dry;
Step e: coating adhesion promotion layer
The 3rd coating roll 13 evenly is coated on the copolyesters class sizing agent adhesion promotion layer in the 3rd coating pan 12 surface of undercoat, carry out drying and processing by drying channel 5 again, the thickness of adhesion promotion layer is 0.4 μ m after the oven dry, then by winder 14 harvest coiled materials;
Step f: cut
Coiled material pre-painting film both sides of the edge after rolling accumulative total is cut away 20mm, and the finished product width is 1580mm, and thickness is 40.445 μ m, thickness deviation≤2 μ m.
Embodiment two:
As shown in Figure 1, a kind of two-way stretch digital pre-laminating film comprises substrate layer 01, and the one side of substrate layer is sequentially provided with middle layer 02, hot melt adhesive layer 03, undercoat 04, adhesion promotion layer 05.
Wherein, the width of substrate layer 01, middle layer 02, hot melt adhesive layer 03, undercoat 04, adhesion promotion layer 05 is 1600mm.
The preparation method of the described two-way stretch digital pre-laminating film of the present embodiment comprises the steps:
Step a: substrate layer unreels
Be that 15 μ m biaxial tension nylon (BOPA) films are placed on the unreeling machine and unreel by air-expanding shaft with thickness;
Step b: coating middle layer
1., the first coating roll is evenly coated the polymine in the first coating pan (PEI) aqueous solution on the surface of biaxial tension nylon (BOPA) film;
2., biaxial tension nylon (BOPA) film that is coated with polymine (PEI) aqueous solution is dried through drying channel, cool off by cooling roller again, the thickness in middle layer is 0.015 μ m after the oven dry, and dry weight is between 0.009g/ ㎡～0.01g/ ㎡;
Step c: composite hot melt glue-line
1., extrude the forcing machine extruding and hot melting glue of composite production line, multi-procedure place at production line is provided with ozonizer, producing ozone by ozonizer jets to the curtain coating place of the hot melt adhesive of extruding, the deflector roll of the while production line biaxial tension nylon that is compounded with polymine (BOPA) film of drying is delivered to multi-procedure, and push combination with the hot melt adhesive that is cast to multi-procedure by nip roller, form composite membrane, process through cooling roller cooling (temperature is 18 ℃), the thickness of hot melt adhesive layer is 25 μ m again;
2., thickness measurement and adjustment: utilize the β ray in short range, to have extremely strong penetrance and come detect thickness with accurate measurement performance, after the measurement with its result feedback to computer, the die gap at the screw speed of computer control forcing machine and die head position is so that obtain the consistent pre-coating film of even thickness.
Steps d: painting bottom coating
1., before the Coating, first Corona Surface Treatment is carried out by corona processor in the hot melt adhesive layer surface, reach hot melt adhesive layer surface dyne value in 36～38 scopes;
2., the second coating roll evenly coats the amine surface treatment agent undercoat in the second coating pan the surface of hot melt adhesive, carries out drying and processing by drying channel again, the thickness of undercoat is 0.03 μ m after the oven dry;
Step e: coating adhesion promotion layer
The 3rd coating roll is evenly coated the copolyesters class sizing agent adhesion promotion layer in the 3rd coating pan surface of undercoat, carries out drying and processing by drying channel again, and the thickness of adhesion promotion layer is 0.4 μ m after the oven dry, then becomes coiled material by winder;
Step f: cut
Coiled material pre-painting film both sides of the edge after rolling accumulative total is cut away 20mm, and the finished product width is 1580mm, and thickness is 40.445 μ m, thickness deviation≤2 μ m.
Claims (8)
1. two-way stretch digital pre-laminating film, comprise substrate layer and the hot melt adhesive layer compound with it, it is characterized in that, between described substrate layer and the described hot melt adhesive layer middle layer is set, the one side away from substrate layer on the described hot melt adhesive layer sequentially is compounded with undercoat and adhesion promotion layer.
2. two-way stretch digital pre-laminating film according to claim 1 is characterized in that, described substrate layer adopts biaxially oriented film, and described hot melt adhesive layer adopts polyethylene copolymer.
3. two-way stretch digital pre-laminating film according to claim 1 is characterized in that, polymine (PEI), the molecular formula of polymine (PEI): (CH are adopted in described middle layer
2CH
2NH)
n, select the n value according to the molecular-weight average of polymkeric substance in 1000～10000 scope.
4. two-way stretch digital pre-laminating film according to claim 2, it is characterized in that, described substrate layer comprises biaxial stretching polyester (BOPET) film, Biaxially oriented polypropylene film (BOPP) (BOPP) film, biaxial tension nylon (BOPA) film, and the thickness of described substrate layer is 10 μ m～50 μ m;
Described hot melt adhesive layer adopts a kind of in ethene-vinyl acetate (EVA) multipolymer, ethylene-propylene acetoacetic ester (EEA) multipolymer, ethylene-acrylic acid (EAA) multipolymer, ethylene-methyl acrylate (EMA) multipolymer, the Low Density Polyethylene (LDPE), and the thickness of described hot melt adhesive layer is 10 μ m～50 μ m.
5. two-way stretch digital pre-laminating film according to claim 3 is characterized in that, the thickness in described middle layer is 0.01 μ m～0.03 μ m, and it applies dry weight is 0.009g/m
2～0.011g/m
2
6. two-way stretch digital pre-laminating film according to claim 4 is characterized in that, the thickness of described undercoat is 0.01 μ m～0.07 μ m, and it applies dry weight is 0.02g/m
2～0.05g/m
2
The thickness of described adhesion promotion layer is 0.05 μ m～0.6 μ m, and it applies dry weight is 0.2g/m
2～0.6g/m
2
7. two-way stretch digital pre-laminating film according to claim 6 is characterized in that, the thickness of described undercoat is 0.02 μ m～0.06 μ m, and it applies dry weight is 0.02g/m
2～0.04g/m
2
The thickness of described adhesion promotion layer is 0.1 μ m～0.5 μ m, and it applies dry weight is 0.2g/m
2～0.5g/ m
2
8. each described two-way stretch digital pre-laminating film is characterized in that according to claim 1～7, and the width of described substrate layer, described middle layer, described hot melt adhesive layer, described undercoat, described adhesion promotion layer is all identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220321304 CN202912882U (en) | 2012-07-04 | 2012-07-04 | Two-way stretch digital precoating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220321304 CN202912882U (en) | 2012-07-04 | 2012-07-04 | Two-way stretch digital precoating film |
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| CN202912882U true CN202912882U (en) | 2013-05-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757740A (en) * | 2012-07-04 | 2012-10-31 | 北京康得新复合材料股份有限公司 | Two-way stretch digital pre-coating film and preparation method thereof |
| CN108556476A (en) * | 2018-02-28 | 2018-09-21 | 广州九恒条码有限公司 | Printed on line applies silicon and applies hot-melt adhesive device |
| CN109337598A (en) * | 2018-08-09 | 2019-02-15 | 安徽国风塑业股份有限公司 | A kind of digital pre-laminating film and preparation method thereof |
-
2012
- 2012-07-04 CN CN 201220321304 patent/CN202912882U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757740A (en) * | 2012-07-04 | 2012-10-31 | 北京康得新复合材料股份有限公司 | Two-way stretch digital pre-coating film and preparation method thereof |
| CN108556476A (en) * | 2018-02-28 | 2018-09-21 | 广州九恒条码有限公司 | Printed on line applies silicon and applies hot-melt adhesive device |
| CN109337598A (en) * | 2018-08-09 | 2019-02-15 | 安徽国风塑业股份有限公司 | A kind of digital pre-laminating film and preparation method thereof |
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