CN104212383A - Adhesive for plastic film composite inner-layer pre-coated film and preparation method for inner-layer pre-coated film - Google Patents
Adhesive for plastic film composite inner-layer pre-coated film and preparation method for inner-layer pre-coated film Download PDFInfo
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- CN104212383A CN104212383A CN201410462551.XA CN201410462551A CN104212383A CN 104212383 A CN104212383 A CN 104212383A CN 201410462551 A CN201410462551 A CN 201410462551A CN 104212383 A CN104212383 A CN 104212383A
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Abstract
The invention discloses an adhesive for a plastic film composite inner-layer pre-coated film. The adhesive is prepared from the following components in parts by weight: 50-80 parts of EVA resin, 20-50 parts of EEA resin, and 10-30 parts of EAA resin, wherein ethyl acrylate accounts for 20-25% in the EEA resin. The invention further provides a preparation method of the inner-layer pre-coated film. The adhesive for the plastic film composite inner-layer pre-coated film can be coated on the inner-layer film, so that the pre-coating mode can also be applied in compounding an inner printing film with a wider applied range; after the outer-layer film is printed, the adhesive can be directly compounded with the inner-layer pre-coated film; and moreover, the inner-layer pre-coated film is prepared by virtue of a slit hot extrusion method, so that the coating quality is greatly improved.
Description
Technical field
The invention belongs to and mould Film laminated internal layer pre-coating film technical field, relate to and a kind ofly mould the preparation method that Film laminated internal layer pre-coating film sticks with glue agent and internal layer pre-coating film.Internal layer pre-coating film prepared by the present invention, is particularly suitable for the compound of the flexible packing materials such as plastics film, not only convenient but also environmental protection compared with existing instant coating complex method, is that the one of moulding complex method breaks through.
Background technology
Mould Soft Roll complex method at present and mainly contain two kinds, wherein topmost mode is instant coating, i.e. coating binder on film, after drying tunnel drying again with the internal layer membrane compoiste adherings such as cast polypropylene film (CPP film), polyethylene film (PE film), polyvinyl chloride (PVC film), this needs consume the much energy and discharge a large amount of solvent, meanwhile, the problem such as white point, striped that also usually can cause because of coating, underdry in tackiness agent coating process; That what to adopt is outer membrane precoating mode on a small quantity, but because of outer membrane mostly need printing after could compound, in like fashion but can only for not have the transparent film that prints or showing to print film, range of application be very restricted in institute.
Cast polypropylene film (CPP film), polyethylene film (PE film), polyvinyl chloride (PVC film) etc. are generally used as the inner layer material of laminated film.The thickness of the general thin used under the maximum normal temperature of consumption is generally between 25 ~ 50 μm, and this kind of film is soft, has good heat sealability, but very easily tensile deformation after being heated, adopt the technology controlling and process of traditional coating method coating machine very complicated.And existing coating machine is difficult to coating thickness to control below 8 μm, cannot reach the requirement of moulding now composite layer thickness about 2 μm.
Mould Film laminated internal layer pre-coating film, different with existing BOPP (Biaxially Oriented Polypropylene, Biaxially oriented polypropylene film (BOPP)) pre-coating film, internal layer pre-coating film due to service requirements special, tackiness agent must be coated on internal layer membrane.And the tackiness agent used must can cling the BOPP film that skin has printing-ink, the back side of the internal layer membrane of non-gluing can not be clung again simultaneously.It is completely different from existing BOPP pre-coating film that all these require to determine the manufacture craft of moulding composite inner layer pre-coating film.Moulding composite inner layer pre-coating film to obtain that there is practical value, the invention provides a kind of tackiness agent manufacturing process and coating process.
Summary of the invention
Object of the present invention, provide one exactly to mould Film laminated internal layer pre-coating film stick with glue agent to solve the problem, this tackiness agent can be coated on internal layer membrane in advance, thus precoating mode also can be carried out print on Film laminated in range of application is wider, and outer membrane is after printing, directly compound can be carried out with internal layer precoating film of the present invention.
Another object of the present invention there are provided a kind of preparation method of internal layer pre-coating film, adopts above-mentioned tackiness agent and adopts the hot-extrudable legal system of slit for internal layer pre-coating film, substantially increasing coating quality, obtaining having practical value internal layer pre-coating film.
The object of the present invention is achieved like this:
First, the invention provides one to mould Film laminated internal layer pre-coating film and stick with glue agent, be made up of the component of following parts by weight: EVA (Ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer) resin 50-80 part, EEA (Ethylene Ethyl Acrylate, ethylene-ethyl acrylate copolymer) resin 20-50 part, EAA (Ethylene Acrylic Acid, ethylene-acrylic acid copolymer) resin 10-30 part.
Above-mentioned one is moulded Film laminated internal layer pre-coating film and is sticked with glue agent, and wherein, in described EEA resin, the content of ethyl propenoate is 20-25%
Secondly, the invention provides a kind of preparation method of internal layer pre-coating film, comprise the following steps:
(1) prepare tackiness agent as claimed in claim 1, tackiness agent synthesis technique is:
EVA resin 50-80 part, EEA resin 20-50 part and EAA resin 10-30 part are poured in raw material mixing tank respectively and mix, then with granulator granulation tackiness agent;
(2) tackiness agent prepared is joined tackiness agent to melt in groove, be warmed to 50-120 DEG C, make it to melt and mix;
(3) tackiness agent melted is passed through adjustable gap nozzle, be expressed on the glue spreader of bottom;
(4) be coated on composite inner layer film by glue spreader by tackiness agent, the thickness controlling spread, at 2-5 μm, obtains internal layer pre-coating film.
The preparation method of above-mentioned internal layer pre-coating film, wherein, in EEA resin described in step (1), the content of ethyl propenoate is 20-25%.
The preparation method of above-mentioned internal layer pre-coating film, is characterized in that, described in step (4), composite inner layer film comprises cast polypropylene film, polyethylene film or polyvinyl chloride film.
Film laminated internal layer pre-coating film of moulding of the present invention sticks with glue agent to reach service requirements, and the tackiness agent used must be the organic high molecular polymer of small-molecular-weight, can not add any low-molecular-weight organic matter auxiliary agent.Conventional EVA resin can be used as the main component of tackiness agent, but selects the applicable trade mark very important, the resin of prioritizing selection height VA content and high MI index in principle.In order to strengthen the cohesive force to BOPP, tackiness agent need add EEA resin, and this resin is ethylene-ethyl acrylate copolymer, and wherein the content of ethyl propenoate is at 20-25%.Simultaneously in order to cling the back side of internal layer membrane during rolling, also will add EAA resin, this resin is ethylene acrylic acid co polymer.The add-on of EEA resin and EAA resin is very large to the performance impact of tackiness agent, wherein EEA resin is a kind of low polar macromolecule material, helpful to raising cohesive force, but added tackiness agent melt fluidity and the transparency can be caused to be deteriorated, simultaneously easily cause rolling to cling the phenomenon at the back side.EAA resin is polar resin, adds rear to cohesive force with prevent the back of the body sticky all beneficial, but has added rough sledding such as also can causing melt fluidity variation, cost rising.So the ratio of EEA resin, EAA resin is the key determining Adhensive performance, according to production, storage and service condition, the quality of proportioning guarantee product must be adjusted.
The preparation method of internal layer pre-coating film of the present invention uses the hot-extrudable coating process of slit.Existing pre-coating film production unit is also be coated with by hot-extrudable method, but its dispense tip gap is at least more than 20 μm, also can only be coated onto 5 μm by differential control is the thinnest, and namely existing compound of moulding is coated with method Amount of spread at about 2 μm, this is a very large difficult problem to hot-extrudable method.The hot-extrudable method of our slits used is by the precise hard_drawn tuhes to dispense tip gap, makes it arbitrarily adjustable between 2-5 μm, thus guarantees that coating is coated onto 2 μm and also has good coating quality.
Because internal layer membrane is soft, poor tensile strength, the tension control of coating machine requires higher, reach high-speed coating, all very high to the requirement of equipment and process.The present invention increases a transfer roller for gluing in inner layer film coating process, then hot-extrudable for special slit system is installed on internal layer film production line, has so namely saved Special coating machine and turn increased production efficiency.
Its feature is as follows:
(1) what tradition moulded that Film laminated adopts mostly is instant coating, i.e. coating binder on film, after drying tunnel drying again with internal layer membrane compoiste adhering, this needs consume the much energy and discharge a large amount of solvent, be on a small quantity adopt be outer membrane precoating mode, but film can only be printed for the transparent film or table not having printing, and tackiness agent can be coated on internal layer membrane by the present invention in advance, thus precoating mode also can be carried out print on Film laminated in range of application is wider;
(2) adopt the preparation method of internal layer pre-coating film of the present invention, substantially increase coating quality;
(3) internal layer pre-coating film is used for after Film laminated, both can ensure extremely low dissolvent residual, also can solve all kinds of problem such as white point, striped that the glue levelling, the underdry that easily occur in instant compound cause simultaneously.
Beneficial effect of the present invention: by technical scheme of the present invention, tackiness agent can be coated on internal layer membrane in advance, thus precoating mode also can be carried out print on Film laminated in range of application is wider, and outer membrane is after printing, directly can carry out compound with internal layer pre-coating film of the present invention.And the preparation method of internal layer pre-coating film of the present invention adopts the hot-extrudable method of slit, can guarantee that compared with traditional hot-extrudable method coating is coated onto 2 μm and also has good coating quality, substantially increase coating quality.
Accompanying drawing explanation
Fig. 1 is the apparatus for coating schematic diagram that the preparation method of the internal layer pre-coating film of the embodiment of the present invention adopts.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
One of the present invention is moulded Film laminated internal layer pre-coating film and is sticked with glue agent, is made up of the component of following parts by weight: EVA resin 50-80 part, EEA resin 20-50 part, EAA resin 10-30 part.In EEA resin, the content of ethyl propenoate is 20-25%.
Preferably, one is moulded Film laminated internal layer pre-coating film and is sticked with glue agent, is made up of the component of following parts by weight:
In the EEA resin selected, the content of ethyl propenoate is 23%.
Refer to Fig. 1, the preparation method of internal layer pre-coating film of the present invention, comprises the following steps:
(1) prepare tackiness agent, tackiness agent synthesis technique is:
EVA resin 65g, EEA resin 25g and EAA resin 10g are poured in raw material mixing tank respectively and mix, then with granulator granulation tackiness agent, wherein, in EEA resin, the content of ethyl propenoate is 23%;
(2) tackiness agent prepared is joined tackiness agent to melt in groove 1, be warmed to 50-120 DEG C, make it to melt and mix;
(3) tackiness agent melted is passed through adjustable slit 2, be expressed on the glue spreader 3 of bottom;
(4) be coated on composite inner layer film 4 by glue spreader 3 by tackiness agent, the thickness controlling spread, at 2-5 μm, obtains internal layer pre-coating film; Composite inner layer film 4 comprises cast polypropylene film, polyethylene film or polyvinyl chloride film.
In sum, Film laminated internal layer pre-coating film of moulding of the present invention sticks with glue agent, tackiness agent can be coated on internal layer membrane in advance, thus precoating mode also can be carried out print on Film laminated in range of application is wider, and outer membrane is after printing, directly compound can be carried out with internal layer pre-coating film of the present invention.And the preparation method of internal layer pre-coating film of the present invention adopts the hot-extrudable method of slit, can guarantee that compared with traditional hot-extrudable method coating is coated onto 2 μm and also has good coating quality, substantially increase coating quality.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, various conversion or modification can also be made, therefore all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (5)
1. mould Film laminated internal layer pre-coating film and stick with glue an agent, it is characterized in that, be made up of the component of following parts by weight:
EVA resin 50-80 part, EEA resin 20-50 part, EAA resin 10-30 part.
2. one according to claim 1 is moulded Film laminated internal layer pre-coating film and is sticked with glue agent, it is characterized in that, in described EEA resin, the content of ethyl propenoate is 20-25%.
3. a preparation method for internal layer pre-coating film, is characterized in that, comprises the following steps:
(1) prepare tackiness agent as claimed in claim 1, tackiness agent synthesis technique is:
EVA resin 50-80 part, EEA resin 20-50 part and EAA resin 10-30 part are poured in raw material mixing tank respectively and mix, then with granulator granulation tackiness agent;
(2) tackiness agent prepared is joined tackiness agent to melt in groove, be warmed to 50-120 DEG C, make it to melt and mix;
(3) tackiness agent melted is passed through adjustable gap nozzle, be expressed on the glue spreader of bottom;
(4) be coated on composite inner layer film by glue spreader by tackiness agent, the thickness controlling spread, at 2-5 μm, obtains internal layer pre-coating film.
4. the preparation method of internal layer pre-coating film according to claim 3, is characterized in that, in EEA resin described in step (1), the content of ethyl propenoate is 20-25%.
5. the preparation method of internal layer pre-coating film according to claim 3, is characterized in that, described in step (4), composite inner layer film comprises cast polypropylene film, polyethylene film or polyvinyl chloride film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462551.XA CN104212383B (en) | 2014-09-12 | 2014-09-12 | A kind ofly mould the preparation method that Film laminated internal layer pre-coating film sticks with glue agent and internal layer pre-coating film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410462551.XA CN104212383B (en) | 2014-09-12 | 2014-09-12 | A kind ofly mould the preparation method that Film laminated internal layer pre-coating film sticks with glue agent and internal layer pre-coating film |
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| Publication Number | Publication Date |
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| CN104212383A true CN104212383A (en) | 2014-12-17 |
| CN104212383B CN104212383B (en) | 2016-04-27 |
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| CN201410462551.XA Expired - Fee Related CN104212383B (en) | 2014-09-12 | 2014-09-12 | A kind ofly mould the preparation method that Film laminated internal layer pre-coating film sticks with glue agent and internal layer pre-coating film |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289599A (en) * | 2008-06-04 | 2008-10-22 | 金尔昇 | Process for dispersing hot-melt adhesive fillers |
| 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 |
| CN103059763A (en) * | 2012-04-27 | 2013-04-24 | 李波 | Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method |
| WO2014005537A1 (en) * | 2012-07-04 | 2014-01-09 | 北京康得新复合材料股份有限公司 | Biaxially-oriented tackifying precoated film and manufacturing method therefor |
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2014
- 2014-09-12 CN CN201410462551.XA patent/CN104212383B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289599A (en) * | 2008-06-04 | 2008-10-22 | 金尔昇 | Process for dispersing hot-melt adhesive fillers |
| CN103059763A (en) * | 2012-04-27 | 2013-04-24 | 李波 | Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method |
| 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 |
| WO2014005537A1 (en) * | 2012-07-04 | 2014-01-09 | 北京康得新复合材料股份有限公司 | Biaxially-oriented tackifying precoated film and manufacturing method therefor |
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| CN104212383B (en) | 2016-04-27 |
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