CN108877486A - in-mold label film and preparation method thereof - Google Patents

Abstract

A kind of in-mold label film and preparation method thereof, in-mold label film includes polymer base material film, thermoplastic film in silver print film and ethylene-vinyl acetate copolymer mould, silver print film includes the first adhesive layer, silver-plated laser film, second adhesive layer and transparent protective layer, the silver-plated laser film includes polymer-based bottom and laser silver layer, silver-plated laser film makes the in-mold label film have excellent glossy degree, in addition, the transparent protective layer is while guaranteeing that the information on in-mold label film is complete and clearly displays to consumer, also play a part of the extraneous damage of protection to the in-mold label film, furthermore, the present invention also provides a kind of preparation methods of in-mold label film.

Description

In-mold label film and preparation method thereof

Technical field

The present invention relates to a kind of label materials, more particularly to a kind of in-mold label film and preparation method thereof.

Background technique

In order to make plastic bottle achieve the purpose that indicate content or decoration, in traditional handicraft, producer all holds in plastic cement Pattern or text is added in device surface.The method generallyd use is after plastic bottle molding, then on plastic bottle surface to transfer Or screen painting mode carries out secondary operation.And picture on surface made of printing in this way or text are short of aesthetic feeling, can not cause to disappear Expense person's note that even easily falls off, and loses decoration functions, while the higher cost of secondary operation.

Currently, most be widely used in using paper labels and plastic label due to both label simple production process On various containers, for example, oil bottle, articles for washing bottle, bottle for cosmetics etc., however this label for being pasted on container exterior, if It is chronically in wet environment, for example, being pasted on the label on the containers such as Shampoo bottle, shower cream bottle, facial cleanser bottle, it is easy to Mouldy, content show it is unclear, even fall off, thus lose mark content or decoration effect.

In addition, existing plastic bottle also begins to use in-mold label film, in-mold label film refers to pre-printed paper Opening and closing are coated with special hot melt adhesive at object or thin sumptuous label, the back side, are placed on mould before plastic blown, injection molding or thermoforming Inside type, to generate plastic bottle or basin.Label forms a whole with container, label and bottle body substantially in the same plane, The edge of invisible label, just looking like is printed directly on picture and text on bottle body surface equally, to make to be pasted on plastic bottle Label be not easily stripped.However, the glossiness that current this label film still has printing layer is not high enough, and lack to printing layer Protection and the problem of be easily worn.

Summary of the invention

The purpose of the present invention is overcoming shortcoming in the prior art, provide that a kind of glossiness is good and anti abrasive mould Interior label film and preparation method thereof.

The purpose of the present invention is achieved through the following technical solutions：

A kind of in-mold label film, including：

Polymer base material film, the polymer base material film have the inner surface and the outer surface；

Silver print film, the silver print film include the first adhesive layer, silver-plated laser film, the second adhesive layer and transparent guarantor Sheath, first adhesive layer are adhered on the outer surface of the polymer base material film, and the silver-plated laser film includes macromolecule Basal layer and laser silver layer, the polymer-based bottom are adhered to first adhesive layer far from the polymer base material film One side on, laser silver layer plating is set to one side of the polymer-based bottom far from first adhesive layer On, second adhesive layer is adhered on one side of the laser silver layer far from the polymer-based bottom, described Bright protective layer is adhered to second adhesive layer far from the laser silver layer one side；

Thermoplastic film in ethylene-vinyl acetate copolymer mould, thermoplastic film is bonded in the ethylene-vinyl acetate copolymer mould In on the inner surface of the polymer base material film, thermoplastic film is far from the macromolecule in the ethylene-vinyl acetate copolymer mould Netted exhaust grid is offered on the one side of base material film.

In one embodiment, the polymer base material film with a thickness of 9 microns~16 microns.

In one embodiment, it is arranged on one side of the laser silver layer far from the polymer-based bottom and swashs The radium-shine mark part of light.

In one embodiment, the thickness of first adhesive layer is identical as the thickness of second adhesive layer.

In one embodiment, the silver print film with a thickness of 23 microns~34 microns.

In one embodiment, it is provided on one side of the transparent protective layer far from second adhesive layer multiple Transparent lug.

In one embodiment, the distance between transparent lug described in each adjacent two is equal.

In one embodiment, the transparent lug has drops structure.

In one embodiment, the transparent lug has crescent shape structure.

A kind of preparation method of in-mold label film, includes the following steps：

Polymer base material film is provided；

First bonding agents are subjected to melting operation in advance, then while hot on the outer surface coated in polymer base material film, then, The polymer-based end lamination of silver-plated laser film is overlayed in first bonding agents, after first bonding agents solidification, obtains first Adhesive layer；

Laser operation is carried out on the plating silver layer of the silver-plated laser film using laser technique, obtains laser Radium-shine silver layer；

Second bonding agents are subjected to melting operation in advance, then are coated on the laser silver layer while hot, then while hot will The transparent protective layer of the silver-plated laser film covers in second bonding agents, after second bonding agents solidification, obtains Second adhesive layer；

Ethylene-vinyl acetate copolymer is coated on the inner surface of polymer base material film, and in the ethyl vinyl acetate second Netted exhaust grid is formed on one side of the thermoplastic film far from the polymer base material film in alkene copolymer mould, obtains in-mold labels Film.

Above-mentioned in-mold label film and preparation method thereof on two surfaces of polymer base material film by being arranged silver print film With thermoplastic film in ethylene-vinyl acetate copolymer mould, the silver print film for being especially directly facing spectators further includes the first bonding Layer, silver-plated laser film, the second adhesive layer and transparent protective layer, wherein the silver-plated laser film enables to the in-mold labels Film has more excellent glossy degree, and corrodes more resistant to ink and obstruct steam, to enhance the mark of the in-mold label film Performance and decorative performance are known, in addition, the transparent protective layer is guaranteeing that the information on in-mold label film is complete and clearly displays While to consumer, also play a part of the extraneous damage of protection to the in-mold label film, in this way, above-mentioned in-mold label film phase For existing common label, there are more excellent glossiness and stronger abrasion resistance properties.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.

Fig. 1 is the structural schematic diagram of the in-mold label film of one embodiment of the invention；

Fig. 2 is the structural schematic diagram of the in-mold label film of further embodiment of this invention；

Fig. 3 is the step flow chart of the preparation method of the in-mold label film of one embodiment of the invention；

Fig. 4 is the step flow chart of the preparation method of the in-mold label film of further embodiment of this invention.

Specific embodiment

To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure Add thorough and comprehensive.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", " right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more Any and all combinations of relevant listed item.

Referring to Fig. 1, the in-mold label film 10a of an embodiment, including：Polymer base material film 110, silver print film 120 With thermoplastic film 130 in ethylene-vinyl acetate copolymer mould.

It is appreciated that by will be in polymer base material film 110, silver print film 120 and ethylene-vinyl acetate copolymer mould Thermoplastic film 130 stacks gradually to form label construction, is placed on inside model before plastic blown, injection molding or thermoforming to generate plastics Container, so that label forms a whole with plastic containers, and the surface of label and plastic containers is substantially in the same plane, sees It just look like label to be directly melted in on plastic containers surface the same, great aesthetic feeling, and be not easy to send out less than the raised brim of label It is mould or fall off, play the role of good mark content and decoration.

The polymer base material film 110 has the inner surface and the outer surface.It is appreciated that the polymer base material film 110 is made For the support construction of in-mold label film 10a, there is the inner surface and the outer surface, silver print film 120 and ethylene-can be respectively set Thermoplastic film 130 in acetate ethylene copolymer mould, so that in-mold label film 10a after molding has more excellent performance.In addition, The polymer base material film 110 also needs to have good mechanical performance as the support construction of in-mold label film 10a, to meet During plastic blown, injection molding or thermoforming are to combine in-mold label film and plastic containers together, there is certain branch Support effect avoids the problems such as curling or fold occur in forming process, while can also carry out with other layers of material secured Bonding, lamination is prevented, and can have good syncretizing effect with plastic containers, for example, described polymer-based Material film 110 is polyolefins film or polyester film, and for another example, the polymer base material film 110 is high-density polyethylene resin Base material film, high density polyvinyl-chloride resin base material film, high density poly propylene resin base material film, butyl nitrile EP rubbers base material film, Organic siliconresin substrate film or amino resins substrate film, the high-density polyethylene resin substrate, the high density polyvinyl-chloride Resin base material, the high density poly propylene resin base material, the butyl nitrile EP rubbers substrate, the organic siliconresin substrate or The amino resins substrate can keep preferable intensity, so, it is possible so that mould in the higher and lower situation of temperature Interior label film has good mechanical performance.

In one of the embodiments, the polymer base material film 110 with a thickness of 9 microns~16 microns.It is appreciated that The polymer base material film 110 can play preferably support work with a thickness of 9 microns~16 microns to in-mold label film 10a With, while there is better mechanical performance.Certainly, in other embodiments, the thickness of the macromolecule resin substrate film 110 It can be other values, the thickness of macromolecule resin substrate film 110 can be adjusted according to actual needs.

Referring to Fig. 1, the silver print film 120 includes the first adhesive layer 121, silver-plated laser film 122, the second adhesive layer 123 and transparent protective layer 124, first adhesive layer 121 is adhered on the outer surface of the polymer base material film 110, described Silver-plated laser film 122 includes polymer-based bottom and laser silver layer, and it is viscous that the polymer-based bottom is adhered to described first It connects on one side of the layer 121 far from the polymer base material film 110, the laser silver layer plating is set to the polymer-based end For layer far from the one side of first adhesive layer 121, it is separate that second adhesive layer 123 is adhered to the laser silver layer On the one side of the polymer-based bottom, the transparent protective layer 124 is adhered to second adhesive layer 123 and swashs far from described On the radium-shine silver layer one side of light.

It is appreciated that the silver print film 120 is mainly used for showing the content or identification information of plastic containers, also Decoration function is played, the attention of consumer can be attracted.In order to avoid in-mold label film because glossiness is inadequate, or because making The problem of with being easily worn in the process and it is caused not have good mark and decoration function, the in-mold label film of the present embodiment The silver print film 120 of 10a includes the first adhesive layer 121, silver-plated laser film 122, the second adhesive layer 123 and transparent protective layer 124, first adhesive layer 121 is adhered on the outer surface of the polymer base material film 110, is played the silver print film 120 carry out be bonded effect with the polymer base material film 110, while making the overall structure of the in-mold label film 10a more Stick on conjunction and stabilization, is provided with silver-plated laser film 122 on first adhesive layer 121, it will be understood that laser film is generally using meter It is calculation machine dot matrix photoetching technique, 3D true color holography technology, multiple with dynamic imaging techniques etc., through molding have rainbow dynamic, The hologram image of three-dimensional stereo effect is transferred to polypropylene film (BOPP), polyester film (PET), polyvinyl chloride film (PVC) Or on band coating substrate, commodity packaging surface is then made to obtain certain laser effect in the way of compound, thermoprint, transfer etc. The features such as fruit has anti-counterfeiting performance strong, beautiful, green, environmental protection, bright color, resistance to ink erosion and barrier steam, and surface has There is rainbow dynamic effect.In this way, the silver-plated laser film 122 that the in-mold label film in the present embodiment is arranged, enables to institute In-mold label film is stated with more excellent glossy degree, and corrodes more resistant to ink and obstructs steam, to enhance in the mould The mark performance and decorative performance of label film.Further, the silver-plated laser film 122 includes polymer-based bottom and laser radium Silver layer is penetrated, the polymer-based bottom is adhered to one side of first adhesive layer 121 far from the polymer base material film 110 On, laser silver layer plating is set on one side of the polymer-based bottom far from first adhesive layer 121, can be with Understand, the polymer-based bottom it is necessary to have preferable stability and stretches strong as the substrate of the silver-plated laser film 122 Degree, for example, the polymer-based bottom is polyester film, it will be understood that polyester film has glossiness good, and mechanical performance is excellent Good, rigidity, hardness and toughness are high, puncture-resistant, rub resistance, high temperature resistant and low temperature, chemical resistance, oil resistivity, air-tightness and The good feature of fragrance protectiveness so, it is possible so that the reflecting feel and crocking resistance of the silver-plated laser film 122 are more preferable；It can be with Understand, the laser silver layer has good corrosion resistance and glossy degree, so, it is possible to further increase described silver-plated The glossy degree and wearability of laser film 122, so that the identification and decorative performance of the in-mold label film are stronger；Into One step, the second adhesive layer 123 and transparent protective layer 124, second adhesive layer are also provided in the silver-plated laser film 122 It is adhered on one side of the laser silver layer far from the polymer-based bottom, the transparent protective layer 124 is adhered to Second adhesive layer 123 is far from the laser silver layer one side；In this way, second adhesive layer 123 can be by institute It states transparent protective layer 124 and the silver-plated laser film 122 is bonded, further improve the whole of the in-mold label film 10a Body structural stability.It should be noted that existing in-mold label film and causes using much due to lacking protective effect It has been worn in journey, so that the mark and decoration function that label should have are lost, in this way, the in-mold label film of the present embodiment 10a is provided with transparent protective layer 124 to realize and play a part of the extraneous damage of protection, while energy to the in-mold label film 10a Enough so that the information on label more completely and is clearly displayed to consumer, for example, the transparent protective layer 124 is transparent poly- Ester film, transparent, oriented stretched polypropene film or transparent polyvinyl chloride film can so play in-mold label film well Protective effect, it is more wear-resistant in use.

In one embodiment, it is arranged on one side of the laser silver layer far from the polymer-based bottom and swashs The radium-shine mark part of light.It is appreciated that the laser silver layer has good corrosion resistance and glossy degree, so, it is possible The glossy degree and wearability for further increasing the silver-plated laser film 122, so that the mark of the in-mold label film Property and decorative performance are stronger, in the present embodiment, in order to further increase the mark performance of the silver-plated laser film 122, also in institute Setting laser mark part on one side of the laser silver layer far from the polymer-based bottom is stated, so, it is possible to mark Know information such as graph text information be set on laser mark part, so as to improve the in-mold label film identification and It is decorative.

In one embodiment, the thickness phase of the thickness of first adhesive layer 121 and second adhesive layer 123 Together.It is appreciated that first adhesive layer 121 is carried out as by the polymer base material film 110 and the laser silver layer The intermediate member of bonding, and second adhesive layer 123 is used as the laser silver layer and the transparent protective layer 124 The intermediate member being bonded, the thickness of first adhesive layer 121 situation identical as the thickness of second adhesive layer 123 Under, it enables to each layer structural bond power inside the in-mold label film more uniform, so, it is possible so that the mould internal standard Overall structure and the performance for signing film 10a are more stable.

In one embodiment, the silver print film 120 with a thickness of 23 microns~34 microns.It is appreciated that institute Intermediate member of the silver print film 120 as in-mold label film 10a is stated, the content or mark letter of display plastic containers are played The effect of breath and decoration then will increase production cost if the thickness of the silver print film 120 is too thick, in this way, the plating Silver-colored print film 120 with a thickness of 23 microns~34 microns, while can reach with excellent glossiness and identification, again Cost can be controlled, certainly, in other embodiments, the thickness of the silver print film 120 is also possible to other values, silver-plated print The thickness of brush film 120 can be adjusted according to actual needs.

In one embodiment, it is arranged on one side of the transparent protective layer 121 far from second adhesive layer 123 There are multiple transparent lugs.It is appreciated that the transparent protective layer 124 mainly plays the information printed on in-mold label film 10a The effect of protection, influences to watch to avoid being worn in use, meanwhile, transparent protective layer 121 is used as consumer most The outer membrane being immediately seen is provided with multiple transparent lugs and in-mold label film 10a is enabled to have more visual effect, and dicoration is more By force, it meanwhile, it is capable to make the frictional force on the surface in-mold label film 10a stronger, can be contacted in use with consumer It is more bonded, avoids sliding, in addition, when in-mold label film 10a is sent into the die cavity of plastic packaging containers by manipulator, The transparent lug can generate stronger frictional resistance with manipulator, avoid falling off during at production, in this way, described Bright protective layer 124 is provided with multiple transparent lugs on the one side far from second adhesive layer 123 can enhance in-mold labels The dicoration and raising production efficiency of film 10a.

In one embodiment, the distance between transparent lug described in each adjacent two is equal.It is appreciated that per adjacent The distance between two transparent lugs are equal, so that the transparent lug is evenly distributed on the transparent protective layer 124 And it is neat, it so, it is possible so that the whole visual effect of the transparent protective layer 124 is more preferable, while can enhance in the mould The glossy degree of label film 10a.

In one embodiment, the transparent lug has drops structure.It is appreciated that the shape of the transparent lug Shape structure is different, can play different decorative effect and using effect, and in the present embodiment, the transparent lug has water droplet Shape structure, so, it is possible so that the in-mold label film 10a have more excellent decorative effect and using when be less susceptible to slide It falls.

In one embodiment, the transparent lug has crescent shape structure.It is appreciated that the shape of the transparent lug Shape structure is different, can play different decorative effect and using effect, and in the present embodiment, the transparent lug has crescent moon Shape structure, so, it is possible so that the in-mold label film 10a have more excellent decorative effect and using when be less susceptible to slide It falls.

Referring to Fig. 1, the bonding of thermoplastic film 130 is the polymer base material in the ethylene-vinyl acetate copolymer mould On the inner surface of film 110, thermoplastic film 130 is far from the polymer base material film 110 in the ethylene-vinyl acetate copolymer mould Netted exhaust grid is offered on one side.It is appreciated that 130 conduct of thermoplastic film in the ethylene-vinyl acetate copolymer mould In-mold label film 10a carries out the component that crosslinking is merged with plastic containers, and thermoplastic film is set in the ethylene-vinyl acetate copolymer mould It is placed on the inner surface of the polymer base material film 110, it can be in plastic blown, injection molding or thermoforming by the in-mold labels Film and plastic containers are cross-linked to form an entirety；Further, in order to avoid in-mold label film 10a is merged with plastic containers When generate bubble, to generate defective products, thermoplastic film 130 is far from the high score in the ethylene-vinyl acetate copolymer mould Netted exhaust grid is offered on the one side of sub- base material film 110, so, it is possible will be between in-mold label film 10a and plastic containers Bubble be quickly discharged, became one in this way, being conducive to in-mold label film 10a with plastic containers, become a part of container, And then play the role of more preferably identifying and decorating.

In one embodiment, in the ethylene-vinyl acetate copolymer mould thermoplastic film 130 with a thickness of 35 microns~ 50 microns.If being appreciated that the thickness of thermoplastic film 130 in the ethylene-vinyl acetate copolymer mould is too small, then it is unfavorable for institute It states in-mold label film 10a and plastic containers crosslinking melt forms an entirety, or curling and fold occurs, in this way, this implementation In example, in the ethylene-vinyl acetate copolymer mould thermoplastic film 130 with a thickness of 35 microns~50 microns, enable to described Thermoplastic film 130 is even closer in conjunction with the other structures of the in-mold label film 10a in ethylene-vinyl acetate copolymer mould, So that the overall structure of the in-mold label film 10a is more stable, especially one can be preferably formed with plastic containers A entirety.

Above-mentioned in-mold label film on two surfaces of polymer base material film by being arranged silver print film and ethyl vinyl acetate second Thermoplastic film in alkene copolymer mould, be especially directly facing spectators silver print film further include the first adhesive layer, silver-plated laser film, Second adhesive layer and transparent protective layer, wherein it is more excellent that the silver-plated laser film enables to the in-mold label film to have Glossy degree, and more resistant to ink corrode and obstruct steam, to enhance the mark performance and dicoration of the in-mold label film Can, in addition, the transparent protective layer is while guaranteeing that the information on in-mold label film is complete and clearly displays to consumer, Also play a part of the extraneous damage of protection to the in-mold label film, in this way, above-mentioned in-mold label film is relative to existing common Label has more excellent glossiness and stronger abrasion resistance properties.

Referring to Fig. 2, the in-mold label film 10c of another embodiment, which is characterized in that including：Polymer base material film 310, Thermoplastic film 330 in silver print film 320 and ethylene-vinyl acetate copolymer mould.

It is appreciated that by will be in polymer base material film 310, silver print film 320 and ethylene-vinyl acetate copolymer mould Thermoplastic film 330 stacks gradually to form label construction, is placed on inside model before plastic blown, injection molding or thermoforming to generate plastics Container, so that label forms a whole with plastic containers, and the surface of label and plastic containers is substantially in the same plane, sees It just look like label to be directly melted in on plastic containers surface the same, great aesthetic feeling, and be not easy to send out less than the raised brim of label It is mould or fall off, play the role of good mark content and decoration.

The polymer base material film 310 has the inner surface and the outer surface.It is appreciated that the polymer base material film 310 is made For the support construction of in-mold label film, there is the inner surface and the outer surface, silver print film 320 and ethylene-vinegar can be respectively set Thermoplastic film 330 in sour ethylene copolymer mould, so that in-mold label film 10c after molding has more excellent performance.In addition, institute It states polymer base material film 310 as the support construction of in-mold label film 10c also to need that there is good mechanical performance, to meet During plastic blown, injection molding or thermoforming are to combine in-mold label film and plastic containers together, there is certain support Effect avoids the problems such as fold occurs in forming process, while can also merge effect with good with plastic containers material Fruit, for example, the polymer base material film 310 is polyolefins film or polyester film, for another example, the polymer base material film 310 for high-density polyethylene resin base material film, high density polyvinyl-chloride resin base material film, high density poly propylene resin base material film, Butyl nitrile EP rubbers base material film, organic siliconresin substrate film or amino resins substrate film, the high-density polyethylene resin base Material, the high density polyvinyl-chloride resin base material, the high density poly propylene resin base material, the butyl nitrile EP rubbers base Material, the organic siliconresin substrate or the amino resins substrate in the higher and lower situation of temperature, can keep compared with Good intensity so, it is possible so that in-mold label film 10c has good mechanical performance.

Referring to Fig. 2, the silver print film 320 includes the first adhesive layer 321, silver-plated laser film 322, the second adhesive layer 323 and transparent protective layer 324, first adhesive layer 321 is adhered on the outer surface of the polymer base material film 310, described Silver-plated laser film 322 includes polymer-based bottom and laser silver layer, and it is viscous that the polymer-based bottom is adhered to described first It connects on one side of the layer 321 far from the polymer base material film 310, the laser silver layer plating is set to the polymer-based end For layer far from the one side of first adhesive layer 321, it is separate that second adhesive layer 323 is adhered to the laser silver layer On the one side of the polymer-based bottom, the transparent protective layer 324 is adhered to second adhesive layer far from the laser On radium-shine silver layer one side.

It is appreciated that the silver print film 320 is mainly used for showing the content or identification information of plastic containers, also Decoration function is played, the attention of consumer can be attracted.In order to avoid in-mold label film 10c because glossiness is inadequate, Huo Zheyin The problem of being easily worn in use and it is caused not have good mark and decoration function, the mould internal standard of the present embodiment The silver print film 320 for signing film 10c includes the first adhesive layer 321, silver-plated laser film 322, the second adhesive layer 323 and transparency protected Layer 324, first adhesive layer 321 is adhered on the outer surface of the polymer base material film 310, is played the silver print Film 320 carries out be bonded effect with the polymer base material film 310, while making the overall structure of the in-mold label film 10c It is more bonded and stablizes, silver-plated laser film 322 is provided on first adhesive layer 321, it will be understood that laser film generally uses Computer dot matrix photoetching technique, 3D true color holography technology, multiple and dynamic imaging techniques etc. are moved through molding handle with rainbow State, three-dimensional stereo effect hologram image be transferred to polypropylene film (BOPP), polyester film (PET), polyvinyl chloride film (PVC) or on band coating substrate, then commodity packaging surface is made to obtain certain laser in the way of compound, thermoprint, transfer etc. The features such as laser effect has anti-counterfeiting performance strong, beautiful, green, environmental protection, bright color, resistance to ink erosion and barrier steam, and Surface has rainbow dynamic effect.In this way, the silver-plated laser film 322 that the in-mold label film 10c in the present embodiment is arranged, energy It enough so that the in-mold label film 10c has more excellent glossy degree, and corrodes more resistant to ink and obstructs steam, to enhance The mark performance and decorative performance of the in-mold label film 10c.Further, the silver-plated laser film 322 includes macromolecule Basal layer and laser silver layer, the polymer-based bottom are adhered to first adhesive layer 321 far from described polymer-based On the one side of material film 310, the laser silver layer plating is set to the polymer-based bottom far from first adhesive layer 321 One side on, it will be understood that it is necessary to have preferable steady as the substrate of the silver-plated laser film for the polymer-based bottom Qualitative and tensile strength, for example, the polymer-based bottom is polyester film, it will be understood that polyester film has glossiness good, Good mechanical performance, rigidity, hardness and toughness are high, puncture-resistant, rub resistance, high temperature resistant and low temperature, chemical resistance, oil resistant Property, air-tightness and the good feature of fragrance protectiveness, so, it is possible reflecting feel and rub resistance so that the silver-plated laser film 322 It can be more preferable；It is appreciated that the laser silver layer has good corrosion resistance and glossy degree, so, it is possible further Improve the glossy degree and wearability of the silver-plated laser film 322 so that the identification of the in-mold label film 10c and Decorative performance is stronger；Further, the second adhesive layer 323 and transparent protective layer are also provided on the silver-plated laser film 322 324, second adhesive layer 323 is adhered on one side of the laser silver layer far from the polymer-based bottom, institute It states transparent protective layer 324 and is adhered to second adhesive layer 323 far from the laser silver layer one side；In this way, described The transparent protective layer 324 and the silver-plated laser film 322 can be bonded by the second adhesive layer 323, be further improved The overall structure stability of the in-mold label film 10c.It should be noted that existing in-mold label film 10c is much due to lacking Weary protective effect, and cause to be worn in use, to lose the mark and decoration function that label should have, such as This, the in-mold label film 10c of the present embodiment plays the in-mold label film 10c with realization provided with transparent protective layer 324 anti- The effect of the extraneous damage of shield, while enabling to the information on label more complete and clearly displaying to consumer, for example, institute Stating transparent protective layer 324 is transparent polyester film, transparent, oriented stretched polypropene film or transparent polyvinyl chloride film, such energy It is enough to play a good protective effect to in-mold label film, it is more wear-resistant in use.

Referring to Fig. 2, thermoplastic film 330 includes transition adhesive layer 331, highly dense in the ethylene-vinyl acetate copolymer mould Spend in ethylene-vinyl acetate copolymer mould thermoplastic layer 333, institute in thermoplastic layer 332 and low density ethylene-acetate ethylene copolymer mould It states transition adhesive layer 331 to be adhered on the inner surface of the polymer base material film 310, the high density ethylene-vinyl acetate is total Thermoplastic layer 332 is adhered on one side of the transition adhesive layer 331 far from the polymer base material film 310 in polymers mould, institute It states thermoplastic layer 333 in low density ethylene-acetate ethylene copolymer mould and is adhered to the high density ethylene-acetate ethylene copolymer mould On one side of the interior thermoplastic layer 332 far from the transition adhesive layer 331, in the low density ethylene-acetate ethylene copolymer mould Thermoplastic layer 333 offers netted row on the one side far from thermoplastic layer 332 in the high density ethylene-acetate ethylene copolymer mould Gas grid, wherein the netted exhaust grid includes that a plurality of be spaced apart is set to the low density ethylene-vinyl acetate copolymerization Transverse roller pressure in object mould on one side of the thermoplastic film far from thermoplastic layer in the high density ethylene-acetate ethylene copolymer mould Air drain and it is a plurality of be spaced apart be set to the low density ethylene-acetate ethylene copolymer mould in thermoplastic film far from described highly dense Spend longitudinal roll-in air discharge duct in ethylene-vinyl acetate copolymer mould on the one side of thermoplastic layer, each transverse roller pressure Air drain is perpendicular with each longitudinal roll-in air discharge duct respectively.

It is appreciated that thermoplastic film 330 is used as in-mold label film 10c and plastics in the ethylene-vinyl acetate copolymer mould Container carries out the component of crosslinking fusion, can be in plastic blown, injection molding or thermoforming by the in-mold label film 10c and plastics Container is cross-linked to form an entirety；Further, in order to enable in-mold label film 10c preferably merges formation one with plastic containers A entirety, thermoplastic film 330 includes transition adhesive layer 331, high density ethylene-acetic acid in the ethylene-vinyl acetate copolymer mould Thermoplastic layer 333 in thermoplastic layer 332 and low density ethylene-acetate ethylene copolymer mould in ethylene copolymer mould.It is appreciated that described Transition adhesive layer 331 can be by thermoplastic film 330 in the ethylene-vinyl acetate copolymer mould in the polymer base material film 310 Be bonded so that the internal structure of the in-mold label film 10c be more bonded it is compact；And the high density ethylene-acetic acid second Thermoplastic layer 332 enables to the in-mold label film 10c to be preferably crosslinked with plastic containers in alkene copolymer mould, Ke Yili Solution, the copolymer of ethylene-vinyl acetate copolymer ethylene and vinylacetate, with easy processing, compatibility is good, amount of deflection is high, soft High, anti-aging, weatherability the is good advantage of toughness, and it is inviscid at normal temperature, it can be made by the hot pressing of certain condition Melting and crosslinking curing are generated, becomes fully transparent, the highdensity ethylene-vinyl acetate copolymer is relative to described low close The degree of cross linking for spending ethylene-vinyl acetate copolymer is higher, for example, the acetic acid of the highdensity ethylene-vinyl acetate copolymer Ethylene contents are 5wt%-20wt%, be so, it is possible so that thermoplastic layer in the high density ethylene-acetate ethylene copolymer mould 332 with plastic containers when being crosslinked, and certain crosslinked action is played, so that in-mold label film and plastic containers are cross-linked to form one A entirety, further, in the low density ethylene-acetate ethylene copolymer mould thermoplastic layer 333 as in-mold label film 10c with Plastic containers, which carry out immediate component, crosslinking degree lower low density ethylene-acetate ethylene copolymer when crosslinking fusion, to be had It is preferably crosslinked conducive to thermoplastic layer 333 in the low density ethylene-acetate ethylene copolymer mould with plastic containers, for example, The vinyl acetate content of the low density ethylene-acetate ethylene copolymer is 15wt%-45wt%, in this way, the high density second In alkene-acetate ethylene copolymer mould in thermoplastic layer 332 and the low density ethylene-acetate ethylene copolymer mould thermoplastic layer 333 into Row combines, and the effect for enabling to in-mold label film 10c to merge with the crosslinking of plastic containers is more preferable.Further, described low close Thermoplastic layer 333 is far from thermoplastic layer in the high density ethylene-acetate ethylene copolymer mould in degree ethylene-vinyl acetate copolymer mould Netted exhaust grid is offered on 332 one side, wherein the netted exhaust grid includes that a plurality of be spaced apart is set to the institute Thermoplastic layer 333 is stated in low density ethylene-acetate ethylene copolymer mould far from the high density ethylene-acetate ethylene copolymer mould Transverse roller pressure air drain and a plurality of be spaced apart on the one side of thermoplastic layer 332 are set to the low density ethylene-acetic acid One side of the thermoplastic layer 333 far from thermoplastic layer 332 in the high density ethylene-acetate ethylene copolymer mould in ethylene copolymer mould On longitudinal roll-in air discharge duct, each transverse roller pressure air drain is perpendicular with each longitudinal roll-in air discharge duct respectively.It can To understand, in order to avoid generating bubble during being merged in-mold label film 10c with plastic containers, described low close Netted exhaust grid is offered on the one side of thermoplastic layer 333 in degree ethylene-vinyl acetate copolymer mould, so that mould internal standard Label film 10c is more perfectly bonded with plastic containers progress, and further, the netted exhaust grid includes that a plurality of interval is set The transverse roller pressure air drain and a plurality of spaced longitudinal roll-in air discharge duct set, and each transverse roller pressure air drain point It is not perpendicular with each longitudinal roll-in air discharge duct, it so, it is possible the gas so that between the in-mold label film 10c and plastic containers The more preferable more thoroughly discharge of bubble.

Above-mentioned in-mold label film is by will be in polymer base material film, silver print film and ethylene-vinyl acetate copolymer mould Thermoplastic film stacks gradually to form label construction, wherein silver print film further includes the first adhesive layer, silver-plated laser film, second viscous Connect layer and transparent protective layer, enable to the in-mold label film have more excellent glossy degree, and more resistant to ink corrode and Steam is obstructed, so that the mark performance and decorative performance of the in-mold label film are enhanced, in addition, the transparent protective layer makes The in-mold label film has good abrasion resistance properties；In addition, thermoplastic film further included in ethylene-vinyl acetate copolymer mould Cross thermoplastic layer and low density ethylene-acetate ethylene copolymer Mo Neire in adhesive layer, high density ethylene-acetate ethylene copolymer mould Layer is moulded, and is also provided with netted exhaust grid in the low density ethylene-acetate ethylene copolymer mould on the one side of thermoplastic film, The exhaust performance between in-mold label film and plastic containers is substantially increased, the generation of bubble is avoided.

Referring to Fig. 3, the preparation method of the in-mold label film of an embodiment, includes the following steps：

S110, polymer base material film is provided.

It, can be as the subsequent substrate for preparing in-mold label film, it will be understood that macromolecule by providing polymer base material film Base material film as in-mold label film support construction it is necessary to have good physical mechanical property and chemical property, can satisfy During plastic blown, injection molding or thermoforming are to combine in-mold label film and plastic containers together, there is certain branch Support effect avoids the problems such as curling or fold occur in forming process, while can also carry out with other layers of material secured Bonding, lamination is prevented, and can have good syncretizing effect with plastic containers, for example, described polymer-based Material film be polyolefins film or polyester film, for another example, the polymer base material film be high-density polyethylene resin base material film, High density polyvinyl-chloride resin base material film, high density poly propylene resin base material film, butyl nitrile EP rubbers base material film, organosilicon tree Rouge base material film or amino resins substrate film, the high-density polyethylene resin substrate, the high density polyvinyl-chloride resin base material, The high density poly propylene resin base material, the butyl nitrile EP rubbers substrate, the organic siliconresin substrate or the amino Resin base material can keep preferable intensity, so, it is possible so that in-mold label film in the higher and lower situation of temperature With good mechanical performance.

In order to make polymer base material film that there is better mechanical performance, for example, the polymer base material film is micro- with a thickness of 9 Rice~16 microns, so, it is possible to play in-mold label film better supporting role, while having better mechanical performance.When So, in other embodiments, the thickness of the macromolecule resin substrate film is also possible to other values, macromolecule resin substrate film Thickness can be adjusted according to actual needs.

S120, first bonding agents are subjected to melting operation in advance, then while hot on the outer surface coated in polymer base material film, Then, the polymer-based end lamination of silver-plated laser film is overlayed in first bonding agents, after first bonding agents solidification, is obtained First adhesive layer.

By the way that first bonding agents are carried out melting operation, then while hot on the outer surface coated in polymer base material film, then, The polymer-based end lamination of silver-plated laser film is overlayed in first bonding agents, the first adhesive layer can be obtained after solidification to be cooled. In order to melt first bonding agents preferably, for example, first bonding agents are added under the conditions of 150 DEG C~230 DEG C of temperature In reaction kettle, 30min~45min is mixed to complete melting, is coated with onto the outer surface of polymer base material film；For another example, In order to enable the polymer-based end lamination of silver-plated laser film can be preferably bonded after overlaying in first bonding agents, for example, using Clad steel pressure roller overlays on the polymer-based end lamination of silver-plated laser film in first bonding agents；For another example, in order to enable it is polymer-based The polymer-based bottom of material film and silver-plated laser film is bonded closer, lamination is avoided, for example, the first bonding agents packet Include each component of following mass parts：It 10~28 parts of epoxy resin, 6~18 parts of polyurethane, 4~14 parts of methyl methacrylate and helps 3~10 parts of agent；For another example, the auxiliary agent is hydroxyethyl cellulose or dodecyl sodium sulfate, be so, it is possible so that the macromolecule The polymer-based bottom of base material film and silver-plated laser film is bonded even closer.

S130, laser operation is carried out on the plating silver layer of the silver-plated laser film using laser technique, obtained To laser silver layer.

Laser operation is carried out on the plating silver layer of the silver-plated laser film by using laser technique, it can Obtain laser silver layer.It can be real it is appreciated that carrying out laser operation on the plating silver layer of the silver-plated laser film Cash belongs to the combination with nonmetallic materials, the graph text information of great aesthetic feeling is formed, while having perfect visual effect, after being conducive to It is continuous to be prepared that glossiness is more preferable and the better in-mold label film of decorative effect.Glossy degree and aesthetics are more excellent in order to obtain Good laser silver layer, for example, the 3D true color holography technology will swash on the plating silver layer of the silver-plated laser film The radium-shine operation of light, obtains laser silver layer, so, it is possible so that the reflecting feel and crocking resistance of the silver-plated laser film more It is good；For another example, the plating silver layer is silver-plated polyester film, it will be understood that polyester film has glossiness good, and mechanical performance is excellent Good, rigidity, hardness and toughness are high, puncture-resistant, rub resistance, high temperature resistant and low temperature, chemical resistance, oil resistivity, air-tightness and The good feature of fragrance protectiveness so, it is possible so that the reflecting feel and crocking resistance of the silver-plated laser film are more preferable；For another example, will The plating silver layer of the silver-plated laser film is put into laser machine, carries out radium-shine behaviour according to required radium-shine graph text information Make, for example, the distance between plating silver layer of laser head and the silver-plated laser film is that 20cm~35cm for another example swashs The radium-shine energy of the radium-shine processing of light is 200W~800W, and radium-shine temperature is 150-200 DEG C, and the radium-shine time is 10s~30s, in this way, It can be prepared that glossiness is higher and the higher laser silver layer of aesthetic degree.

S140, second bonding agents are subjected to melting operation in advance, then be coated on the laser silver layer while hot, then take advantage of Heat covers the transparent protective layer of the silver-plated laser film in second bonding agents, after second bonding agents solidification, Obtain the second adhesive layer.

It is coated on the laser silver layer, then takes advantage of by the way that second bonding agents are carried out melting operation in advance, then while hot Heat covers the transparent protective layer of the silver-plated laser film in second bonding agents, after second bonding agents solidification, It can obtain the second adhesive layer.In order to enable second bonding agents carry out Flashmelt, for example, in 160 DEG C~240 DEG C of temperature strip Under part, second bonding agents are added in reaction kettle, 25min~45min are mixed to complete melting, re-coating swashs to described On the outer surface of the radium-shine silver layer of light；For another example, also viscous second in order to enable subsequent be prepared more resistant in-mold label film It connects and covers transparent protective layer in agent, it should be noted that existing in-mold label film causes much due to lacking protective effect It has been worn in use, so that the mark and decoration function that label should have are lost, in this way, in the mould of the present embodiment Label film is provided with transparent protective layer to realize and play a part of the extraneous damage of protection to the in-mold label film, while can make Information on label is more complete and clearly display to consumer, for example, the transparent protective layer be transparent polyester film, Transparent, oriented stretched polypropene film or transparent polyvinyl chloride film can so play good protection to in-mold label film and make With more wear-resistant in use.For another example, in order to enable what the transparent protective layer and the laser silver layer were bonded It is closer, lamination is avoided, for example, the second bonding agents include each component of following mass parts：Butyl acrylate 4~13 Part, 6~14 parts of methyl methacrylate, 7~18 parts of methacrylic acid, 22~30 parts of tackifying resin and 4~18 parts of antistatic agent； For another example, the antistatic agent is quaternary cationics, polyoxyethylene alkyl amine compound, polyol fatty acid At least one of ester, alkanolamide；It so, it is possible that better second adhesive layer of adhesive property is prepared, so that institute State transparent protective layer and the laser silver layer bonding it is closer so that the overall structure of in-mold label film is more sticked on It closes, avoids lamination.

S150, ethylene-vinyl acetate copolymer is coated on the inner surface of polymer base material film, and in the ethylene- Netted exhaust grid is formed on one side of the thermoplastic film far from the polymer base material film in acetate ethylene copolymer mould, obtains mould Interior label film.

It, can after cooling and solidifying by the way that ethylene-vinyl acetate copolymer to be coated on the inner surface of polymer base material film Obtain thermoplastic film in ethylene-vinyl acetate copolymer mould, it will be understood that thermoplastic film in the ethylene-vinyl acetate copolymer mould The component that crosslinking is merged, thermoplastic film in the ethylene-vinyl acetate copolymer mould are carried out with plastic containers as in-mold label film It is set on the inner surface of the polymer base material film, it can be in plastic blown, injection molding or thermoforming by the in-mold labels Film and plastic containers are cross-linked to form an entirety；Further, when being merged in order to avoid in-mold label film with plastic containers Bubble is generated, to generate defective products, thermoplastic film is far from the polymer base material in the ethylene-vinyl acetate copolymer mould Netted exhaust grid is offered on the one side of film, so, it is possible the bubble between in-mold label film and plastic containers is quick Discharge, becames one with plastic containers in this way, being conducive to in-mold label film, becomes a part of container, and then play more preferable mark The effect known and decorated.

The preparation method of above-mentioned in-mold label film, by the outer surface that first bonding agents are coated in polymer base material film On, then the polymer-based end lamination of silver-plated laser film is overlayed in first bonding agents and obtains the first adhesive layer, and uses laser Radium art carries out laser operation on the plating silver layer of silver-plated laser film, obtains laser silver layer, then in laser radium It penetrates and coats second bonding agents on silver layer, and the transparent protective layer of silver-plated laser film is covered and obtains second in second bonding agents Ethylene-vinyl acetate copolymer is finally coated on the inner surface of polymer base material film and obtains ethene-vinyl acetate by adhesive layer Thermoplastic film in copolymer mould, while netted exhaust grid is formed on one side, so, it is possible to obtain have it is excellent glossy The in-mold label film of degree, in addition, the transparent protective layer guarantee that the information on in-mold label film is complete and clearly display to While consumer, also play a part of the extraneous damage of protection to the in-mold label film.

Referring to Fig. 4, the preparation method of the in-mold label film of another embodiment, includes the following steps：

S310, polymer base material film is provided.

It, can be as the subsequent substrate for preparing in-mold label film, it will be understood that macromolecule by providing polymer base material film Base material film as in-mold label film support construction it is necessary to have good physical mechanical property and chemical property, can satisfy During plastic blown, injection molding or thermoforming are to combine in-mold label film and plastic containers together, there is certain branch Support effect avoids the problems such as curling or fold occur in forming process, while can also carry out with other layers of material secured Bonding, lamination is prevented, and can have good syncretizing effect with plastic containers, for example, described polymer-based Material film be polyolefins film or polyester film, for another example, the polymer base material film be high-density polyethylene resin base material film, High density polyvinyl-chloride resin base material film, high density poly propylene resin base material film, butyl nitrile EP rubbers base material film, organosilicon tree Rouge base material film or amino resins substrate film, the high-density polyethylene resin substrate, the high density polyvinyl-chloride resin base material, The high density poly propylene resin base material, the butyl nitrile EP rubbers substrate, the organic siliconresin substrate or the amino Resin base material can keep preferable intensity, so, it is possible so that in-mold label film in the higher and lower situation of temperature With good mechanical performance.

In order to make polymer base material film that there is better mechanical performance, for example, the polymer base material film is micro- with a thickness of 9 Rice~16 microns, so, it is possible to play in-mold label film better supporting role, while having better mechanical performance.When So, in other embodiments, the thickness of the macromolecule resin substrate film is also possible to other values, macromolecule resin substrate film Thickness can be adjusted according to actual needs.

S320, first bonding agents are subjected to melting operation in advance, then while hot on the outer surface coated in polymer base material film, Then, the polymer-based end lamination of silver-plated laser film is overlayed in first bonding agents, after first bonding agents solidification, is obtained First adhesive layer.

By the way that first bonding agents are carried out melting operation, then while hot on the outer surface coated in polymer base material film, then, The polymer-based end lamination of silver-plated laser film is overlayed in first bonding agents, the first adhesive layer can be obtained after solidification to be cooled. In order to melt first bonding agents preferably, for example, first bonding agents are added under the conditions of 150 DEG C~230 DEG C of temperature In reaction kettle, 30min~45min is mixed to complete melting, is coated with onto the outer surface of polymer base material film；For another example, In order to enable the polymer-based end lamination of silver-plated laser film can be preferably bonded after overlaying in first bonding agents, for example, using Clad steel pressure roller overlays on the polymer-based end lamination of silver-plated laser film in first bonding agents；For another example, in order to enable it is polymer-based The polymer-based bottom of material film and silver-plated laser film is bonded closer, lamination is avoided, for example, the first bonding agents packet Include each component of following mass parts：It 10~28 parts of epoxy resin, 6~18 parts of polyurethane, 4~14 parts of methyl methacrylate and helps 3~10 parts of agent；For another example, the auxiliary agent is hydroxyethyl cellulose or dodecyl sodium sulfate, be so, it is possible so that the macromolecule The polymer-based bottom of base material film and silver-plated laser film is bonded even closer.

S330, laser operation is carried out on the plating silver layer of the silver-plated laser film using laser technique, obtained To laser silver layer.

Laser operation is carried out on the plating silver layer of the silver-plated laser film by using laser technique, it can Obtain laser silver layer.It can be real it is appreciated that carrying out laser operation on the plating silver layer of the silver-plated laser film Cash belongs to the combination with nonmetallic materials, the graph text information of great aesthetic feeling is formed, while having perfect visual effect, after being conducive to It is continuous to be prepared that glossiness is more preferable and the better in-mold label film of decorative effect.Glossy degree and aesthetics are more excellent in order to obtain Good laser silver layer, for example, the 3D true color holography technology will swash on the plating silver layer of the silver-plated laser film The radium-shine operation of light, obtains laser silver layer, so, it is possible so that the reflecting feel and crocking resistance of the silver-plated laser film more It is good；For another example, the plating silver layer is silver-plated polyester film, it will be understood that polyester film has glossiness good, and mechanical performance is excellent Good, rigidity, hardness and toughness are high, puncture-resistant, rub resistance, high temperature resistant and low temperature, chemical resistance, oil resistivity, air-tightness and The good feature of fragrance protectiveness so, it is possible so that the reflecting feel and crocking resistance of the silver-plated laser film are more preferable；For another example, will The plating silver layer of the silver-plated laser film is put into laser machine, carries out radium-shine behaviour according to required radium-shine graph text information Make, for example, the distance between plating silver layer of laser head and the silver-plated laser film is that 20cm~35cm for another example swashs The radium-shine energy of the radium-shine processing of light is 200W~800W, and radium-shine temperature is 150 DEG C -200 DEG C, and the radium-shine time is 10s~30s, such as This, can be prepared that glossiness is higher and the higher laser silver layer of aesthetic degree.

S340, second bonding agents are subjected to melting operation in advance, then be coated on the laser silver layer while hot, then take advantage of Heat covers the transparent protective layer of the silver-plated laser film in second bonding agents, after second bonding agents solidification, Obtain the second adhesive layer.

It is coated on the laser silver layer, then takes advantage of by the way that second bonding agents are carried out melting operation in advance, then while hot Heat covers the transparent protective layer of the silver-plated laser film in second bonding agents, after second bonding agents solidification, It can obtain the second adhesive layer.In order to enable second bonding agents carry out Flashmelt, for example, in 160 DEG C~240 DEG C of temperature strip Under part, second bonding agents are added in reaction kettle, 25min~45min are mixed to complete melting, re-coating swashs to described On the outer surface of the radium-shine silver layer of light；For another example, also viscous second in order to enable subsequent be prepared more resistant in-mold label film It connects and covers transparent protective layer in agent, it should be noted that existing in-mold label film causes much due to lacking protective effect It has been worn in use, so that the mark and decoration function that label should have are lost, in this way, in the mould of the present embodiment Label film is provided with transparent protective layer to realize and play a part of the extraneous damage of protection to the in-mold label film, while can make Information on label is more complete and clearly display to consumer, for example, the transparent protective layer be transparent polyester film, Transparent, oriented stretched polypropene film or transparent polyvinyl chloride film can so play good protection to in-mold label film and make With more wear-resistant in use.For another example, in order to enable what the transparent protective layer and the laser silver layer were bonded It is closer, lamination is avoided, for example, the second bonding agents include each component of following mass parts：Butyl acrylate 4~13 Part, 6~14 parts of methyl methacrylate, 7~18 parts of methacrylic acid, 22~30 parts of tackifying resin and 4~18 parts of antistatic agent； For another example, the antistatic agent is quaternary cationics, polyoxyethylene alkyl amine compound, polyol fatty acid At least one of ester, alkanolamide；It so, it is possible that better second adhesive layer of adhesive property is prepared, so that institute State transparent protective layer and the laser silver layer bonding it is closer so that the overall structure of in-mold label film is more sticked on It closes, avoids lamination.

S350, polyurethane adhesive and high density ethylene-acetate ethylene copolymer be subjected to melting operation in advance respectively, is taken advantage of The polyurethane adhesive is coated on the inner surface of the polymer base material film by heat, then while hot by the high density ethylene- Acetate ethylene copolymer is coated on the polyurethane adhesive, after polyurethane adhesive solidification, obtains transition bonding Layer obtains high density ethylene-acetate ethylene copolymer Mo Neire after the high density ethylene-acetate ethylene copolymer solidification Mould layer.

Refer in strand it is appreciated that polyurethane adhesive is used as containing carbamate groups (- NHCOO-) or different The adhesive of cyanic acid ester group (- NCO), polyurethane adhesive not only have excellent shear strength and impact property, are applicable in In various structural bonding fields, and have excellent flexible nature, has excellent rubber property, adapt to different heat expansion The bonding of coefficient substrate, it is formed between substrate has soft-hard transition zone, and not only bonding force is strong, while also having excellent Buffering, shock-absorbing function.The low temperature and ultralow temperature performance of polyurethane gluing stick are more than the adhesive of every other type.In order to mention The adhesive property of high transition adhesive layer, the polyurethane adhesive in the present embodiment are the agent of polyisocyanates gluing, contain isocyanates At least one of adhesive for polyurethane, hydroxyl adhesive for polyurethane and polyurethane resin gluing agent of base, in this way, subsequent energy It is enough thermoplastic layer in high density ethylene-acetate ethylene copolymer mould is carried out with the polymer base material film it is be bonded so that the mould The internal structure of interior label film is more bonded compact

It is appreciated that ethylene-vinyl acetate copolymer is the copolymer of ethylene and vinylacetate, there is easy processing, phase The advantage that capacitive is good, amount of deflection is high, flexibility is high, anti-aging, weatherability is good, and it is inviscid at normal temperature, by certain item The hot pressing of part can make it generate melting and crosslinking curing, become fully transparent, and high density ethylene-acetate ethylene copolymer phase It is higher for low density ethylene-acetate ethylene copolymer degree of cross linking, for example, the high density ethylene-acetate ethylene copolymer Vinyl acetate content be 5wt%-20wt%, so, it is possible so that subsequent obtained high density ethylene-acetate ethylene copolymer When thermoplastic layer and plastic containers are crosslinked in mould, crosslinked action is played, so that in-mold label film is cross-linked to form with plastic containers One entirety.

By the way that the polyurethane adhesive and the high density ethylene-acetate ethylene copolymer are first carried out melting behaviour respectively Make, enables to the polyurethane adhesive and the high density ethylene-acetate ethylene copolymer to be easier to carry out coating operation, be Melt the polyurethane adhesive and the high density ethylene-acetate ethylene copolymer preferably, for example, 140 DEG C~ Under the conditions of 250 DEG C of temperature, the polyurethane adhesive is added in reaction kettle, 20min~40min is mixed to complete Melting, for another example, under the conditions of 170 DEG C~280 DEG C of temperature, the high density ethylene-acetate ethylene copolymer is added to instead It answers in kettle, 25min~50min is mixed to complete melting, then, the polyurethane adhesive after melting is coated while hot On the inner surface of the polymer base material film, then, then the high density ethylene-acetate ethylene copolymer after melting taken advantage of Heat is coated on the polyurethane adhesive, after polyurethane adhesive solidification, transition adhesive layer is obtained, to described highly dense After spending ethylene-vinyl acetate copolymer solidification, thermoplastic layer in high density ethylene-acetate ethylene copolymer mould is obtained.

S360, low density ethylene-acetate ethylene copolymer is subjected to melting operation in advance, it is described while hot by low-density second Alkene-acetate ethylene copolymer is coated in the high density ethylene-acetate ethylene copolymer mould on thermoplastic layer, and then, use is cold Pressure anilox roll carries out cold press operation on the ethylene-vinyl acetate copolymer, obtains low density ethylene-acetate ethylene copolymer Thermoplastic layer in mould, and in the low density ethylene-acetate ethylene copolymer mould thermoplastic layer far from the high density ethylene-acetic acid Netted exhaust grid is formed in ethylene copolymer mould on the one side of thermoplastic layer, obtains in-mold label film.

It is appreciated that low density ethylene-acetate ethylene copolymer is compared to the friendship of high density ethylene-acetate ethylene copolymer Connection degree is lower, in this way, it is subsequent in-mold label film and plastic containers are subjected to integral blow, injection molding or thermoforming when, it is described low Density polyethylene-acetate ethylene copolymer can be preferably crosslinked with plastic containers material, be conducive to in-mold label film and plastics It is higher that container forms the degree of cross linking, and integrally formed effect is more preferable.For example, low density ethylene-the acetate ethylene copolymer Vinyl acetate content is 15wt%-45wt%, in this way, thermoplastic in the low density ethylene being subsequently formed-acetate ethylene copolymer mould Layer be combined with each other with thermoplastic layer in the high density ethylene-acetate ethylene copolymer mould, enables to in-mold label film and plastics The effect of the crosslinking fusion of container is more preferable.

By the way that low density ethylene-acetate ethylene copolymer is first carried out melting operation, the low close of molten condition can be obtained Ethylene-vinyl acetate copolymer is spent, to be preferably coated in other surfaces, for example, in 120 DEG C~200 DEG C of temperature strip Under part, the low density ethylene-acetate ethylene copolymer is added in reaction kettle, 15min~30min is mixed to complete Melting, then be coated in the high density ethylene-acetate ethylene copolymer mould on thermoplastic layer while hot, then, using cold pressing reticulate pattern Roller carries out cold press operation on the ethylene-vinyl acetate copolymer, obtains low density ethylene-acetate ethylene copolymer Mo Neire Mould layer.Further, the cold press operation specifically comprises the following steps：S241, using cold pressing anilox roll, and cold pressing reticulate pattern The surface of roller coats antitack agent；S242, magnetic powder is added into low density ethylene-acetate ethylene copolymer of molten condition, carries out Stirring operation obtains mixing slurry；S243, mixing slurry is coated in while hot in the high density ethylene-acetate ethylene copolymer mould On thermoplastic layer, low density ethylene-acetate ethylene copolymer coating is obtained；S244, low density ethylene-acetate ethylene copolymer is applied Layer carries out network type cold blocking, and formation includes orthogonal a plurality of spaced transverse roller pressure air drain and a plurality of interval The netted exhaust grid of longitudinal roll-in air discharge duct of setting, obtains thermoplastic layer in low density ethylene-acetate ethylene copolymer mould.Such as This, can in the low density ethylene-acetate ethylene copolymer mould thermoplastic layer it is total far from the high density ethylene-vinyl acetate The in-mold label film of netted exhaust grid is formed in polymers mould on the one side of thermoplastic layer.In order to avoid cold in cold press operation Anilox roll and the low density ethylene-acetate ethylene copolymer is pressed to carry out adhesion, for example, the antitack agent is small particle titanium dioxide At least one of the round and smooth glass microballoon in silicon powder, surface, ABS antitack agent and ethylene bis stearamide.In order to make mould internal standard Label film be molded with plastic containers, be blow molded or thermoforming before, preferably adsorb and fix in mold inner-cavity, avoid sliding, also Magnetic powder is added in low density ethylene-acetate ethylene copolymer of the molten condition, for example, the magnetic powder is iron oxide magnetic At least one of powder, chromium dioxide magnetic powder and cobalt-iron oxide magnetic powder, in this way, so enabling to in-mold label film and molding The inner sidewall of the type chamber of mould is preferably bonded together, and in-mold label film is not likely to produce buckling problems, and surface smoothness is higher, So that in-mold label film preferably and is more uniformly crosslinking admittedly with the plastic cement molten liquid for the type chamber for being injected into pattern Change reaction, this magnetic suck effect is highly stable, this is because the size completion of magnetic attraction can be by being added to the mixing slurry The amount of middle magnetic powder controls, and in actual operation, engineering staff need to only be tested several times according to actual needs to be groped to obtain Relationship to the inner sidewall of the type chamber of shaping mould, magnetic powder material and magnetic powder quantity and magnetic attraction is flexibly adjusted in subsequent Section, however, Electrostatic Absorption be it is highly unstable, be very unlikely to control, be entirely by charge extremely rambunctious come realize inhale Attached power improves the precision of magnetic suck therefore, it is necessary to ensure to mitigate the interference of Electrostatic Absorption by the way that antistatic agent is added.

The preparation method of above-mentioned in-mold label film is arranged after the first adhesive layer is prepared in polymer base material film Outer surface on, then successively obtain laser silver layer, the second adhesive layer, then cover transparent protective layer in the second adhesive layer On, the excellent in-mold label film of glossy degree is obtained conducive to subsequent, in addition, transparent protective layer can improve the wear-resistant of in-mold label film Property, transition adhesive layer is then formed on the inner surface of polymer base material film, and it is total successively to obtain high density ethylene-vinyl acetate Thermoplastic layer in thermoplastic layer and low density ethylene-acetate ethylene copolymer mould in polymers mould, and it is total in low density ethylene-vinyl acetate Netted exhaust grid is formed in polymers mould on the one side of thermoplastic layer, has obtained the good in-mold label film of exhaust performance, in this way, Enable to bubble between in-mold label film and plastic containers quickly and thoroughly discharge, improve after molding in-mold label film and The integrally-built aesthetics of plastic containers.

It is below specific embodiment part.

Embodiment 1

High-density polyethylene resin base material film is provided；

Under the conditions of 150 DEG C of temperature, first bonding agents are added in reaction kettle, 30min is mixed to completely molten Melt, then while hot on the outer surface coated in high-density polyethylene resin base material film, it then, will be silver-plated radium-shine using clad steel pressure roller The polymer-based end lamination of film overlays in first bonding agents, after first bonding agents solidification, obtains the first adhesive layer, In, first bonding agents include each component of following mass parts：Epoxy resin 10g, polyurethane 6g, methyl methacrylate 4g, hydroxyl Ethyl cellulose 3g；

Laser operation is carried out on silver-plated polyester film using 3D true color holography technology, obtains laser silver Layer, wherein laser head is 20cm at a distance from silver-plated polyester film, and radium-shine energy is 200W, and radium-shine temperature is 150 DEG C, the radium-shine time is 10s；

Under the conditions of 160 DEG C of temperature, second bonding agents are added in reaction kettle, 25min is mixed to completely molten Melt, then is coated on the silver-plated polyester film while hot, then transparent, oriented stretched polypropene film is covered glued second while hot It connects in agent, after second bonding agents solidification, obtains the second adhesive layer, wherein；Second bonding agents include following mass parts Each component：4 parts of butyl acrylate, 6 parts of methyl methacrylate, 7 parts of methacrylic acid, 22 parts of tackifying resin and polyol fat 5 parts of acid esters；

High density ethylene-vinyl acetate that the agent of polyisocyanates gluing and vinyl acetate content are 5wt% is copolymerized in advance Object carries out melting operation respectively, and polyisocyanates gluing agent is coated in the high-density polyethylene resin base material film while hot On surface, then vinyl acetate content is coated in the polyisocyanic acid for 5wt% high density ethylene-acetate ethylene copolymer while hot On ester adhesive, after polyisocyanates gluing agent solidification, transition adhesive layer is obtained, is 5wt% to vinyl acetate content After high density ethylene-acetate ethylene copolymer solidification, thermoplastic layer in high density ethylene-acetate ethylene copolymer mould is obtained.

Under the conditions of 120 DEG C of temperature, the low density ethylene-acetate ethylene copolymer for being 15wt% by vinyl acetate content Melting operation is carried out, it is described while hot that low density ethylene-acetate ethylene copolymer is coated in the high density ethylene-vinyl acetate In copolymer mould on thermoplastic layer, then, cold pressing behaviour is carried out on the ethylene-vinyl acetate copolymer using cold pressing anilox roll Make, obtains thermoplastic layer in low density ethylene-acetate ethylene copolymer mould, and the low density ethylene-acetate ethylene copolymer Netted exhaust is formed on one side of the thermoplastic layer far from thermoplastic layer in the high density ethylene-acetate ethylene copolymer mould in mould Grid obtains the in-mold label film of embodiment 1.

Embodiment 2

High density poly propylene resin base material is provided；

Under the conditions of 180 DEG C of temperature, first bonding agents are added in reaction kettle, 30min is mixed to completely molten Melt, then while hot on the outer surface coated in high density poly propylene resin base material, then, using clad steel pressure roller by silver-plated laser film Polymer-based end lamination overlay in first bonding agents, after the first bonding agents solidification after, obtain the first adhesive layer, wherein First bonding agents include each component of following mass parts：Epoxy resin 12g, polyurethane 7g, methyl methacrylate 5g, dodecane Base sodium sulfonate 4g；

Laser operation is carried out on silver-plated polyester film using 3D true color holography technology, obtains laser silver Layer, wherein laser head is 25cm at a distance from silver-plated polyester film, and radium-shine energy is 250W, and radium-shine temperature is 160 DEG C, the radium-shine time is 15s；

Under the conditions of 170 DEG C of temperature, second bonding agents are added in reaction kettle, 25min is mixed to completely molten Melt, then is coated on the silver-plated polyester film while hot, then transparent, oriented stretched polypropene film is covered glued second while hot It connects in agent, after second bonding agents solidification, obtains the second adhesive layer, wherein；Second bonding agents include following mass parts Each component：5 parts of butyl acrylate, 8 parts of methyl methacrylate, 9 parts of methacrylic acid, 24 parts of tackifying resin and polyol fat 6 parts of acid esters；

High density ethylene-vinyl acetate that the agent of polyisocyanates gluing and vinyl acetate content are 8wt% is copolymerized in advance Object carries out melting operation respectively, and polyisocyanates gluing agent is coated in the interior table of the high density poly propylene resin base material while hot On face, then vinyl acetate content is coated in the polyisocyanates for 8wt% high density ethylene-acetate ethylene copolymer while hot On adhesive, after polyisocyanates gluing agent solidification, transition adhesive layer is obtained, is 8wt% high to vinyl acetate content After density polyethylene-acetate ethylene copolymer solidification, thermoplastic layer in high density ethylene-acetate ethylene copolymer mould is obtained.

Under the conditions of 130 DEG C of temperature, the low density ethylene-acetate ethylene copolymer for being 20wt% by vinyl acetate content Melting operation is carried out, it is described while hot that low density ethylene-acetate ethylene copolymer is coated in the high density ethylene-vinyl acetate In copolymer mould on thermoplastic layer, then, cold pressing behaviour is carried out on the ethylene-vinyl acetate copolymer using cold pressing anilox roll Make, obtains thermoplastic layer in low density ethylene-acetate ethylene copolymer mould, and the low density ethylene-acetate ethylene copolymer Netted exhaust is formed on one side of the thermoplastic layer far from thermoplastic layer in the high density ethylene-acetate ethylene copolymer mould in mould Grid obtains the in-mold label film of embodiment 2.

Embodiment 3

High density poly propylene resin base material is provided；

Under the conditions of 200 DEG C of temperature, first bonding agents are added in reaction kettle, 30min is mixed to completely molten Melt, then while hot on the outer surface coated in high density poly propylene resin base material, then, using clad steel pressure roller by silver-plated laser film Polymer-based end lamination overlay in first bonding agents, after the first bonding agents solidification after, obtain the first adhesive layer, wherein First bonding agents include each component of following mass parts：Epoxy resin 15g, polyurethane 7g, methyl methacrylate 7g, dodecane Base sodium sulfonate 5g；

Laser operation is carried out on silver-plated polyester film using 3D true color holography technology, obtains laser silver Layer, wherein laser head is 26cm at a distance from silver-plated polyester film, and radium-shine energy is 250W, and radium-shine temperature is 160 DEG C, the radium-shine time is 20s；

Under the conditions of 170 DEG C of temperature, second bonding agents are added in reaction kettle, 25min is mixed to completely molten Melt, then is coated on the silver-plated polyester film while hot, then transparent, oriented stretched polypropene film is covered glued second while hot It connects in agent, after second bonding agents solidification, obtains the second adhesive layer, wherein；Second bonding agents include following mass parts Each component：5 parts of butyl acrylate, 8 parts of methyl methacrylate, 9 parts of methacrylic acid, 24 parts of tackifying resin and polyol fat 6 parts of acid esters；

High density ethylene-vinyl acetate that the agent of polyisocyanates gluing and vinyl acetate content are 8wt% is copolymerized in advance Object carries out melting operation respectively, and polyisocyanates gluing agent is coated in the interior table of the high density poly propylene resin base material while hot On face, then vinyl acetate content is coated in the polyisocyanates for 8wt% high density ethylene-acetate ethylene copolymer while hot On adhesive, after polyisocyanates gluing agent solidification, transition adhesive layer is obtained, is 8wt% high to vinyl acetate content After density polyethylene-acetate ethylene copolymer solidification, thermoplastic layer in high density ethylene-acetate ethylene copolymer mould is obtained.

Under the conditions of 130 DEG C of temperature, the low density ethylene-acetate ethylene copolymer for being 20wt% by vinyl acetate content Melting operation is carried out, it is described while hot that low density ethylene-acetate ethylene copolymer is coated in the high density ethylene-vinyl acetate In copolymer mould on thermoplastic layer, then, antitack agent is coated using cold pressing anilox roll, and on the surface of cold pressing anilox roll；It is past molten Melt in low density ethylene-acetate ethylene copolymer of state and magnetic powder is added, is stirred operation, obtains mixing slurry；By mixing slurry It is coated in the high density ethylene-acetate ethylene copolymer mould while hot on thermoplastic layer, it is total to obtain low density ethylene-vinyl acetate Polymers coating；Network type cold blocking is carried out to low density ethylene-acetate ethylene copolymer coating, formation includes orthogonal The netted exhaust grid of a plurality of spaced transverse roller pressure air drain and a plurality of spaced longitudinal roll-in air discharge duct, obtains Thermoplastic layer in low density ethylene-acetate ethylene copolymer mould, finally obtains the in-mold label film of embodiment 3.

It is proved through experiment, the in-mold label film being prepared by embodiment 1 to 3, there is excellent glossy degree, so that mould Information on interior label film can be clear and beautiful display, simultaneously because be provided with transparent protective layer, substantially increase implementation The abrasion resistance properties of the in-mold label film of example 1 to 3, additionally, due on in-mold label film be provided with netted exhaust grid so that Bubble between in-mold label film and plastic containers quickly and is thoroughly discharged, and improves the mould internal standard of embodiment 1 to 3 after molding Sign film and the integrally-built aesthetics of plastic containers.The especially in-mold label film of embodiment 3, also in the low-density of molten condition It joined magnetic powder in ethylene-vinyl acetate copolymer, so enable to the in-mold label film of embodiment 3 and the type chamber of shaping mould Inner sidewall be preferably bonded together, and in-mold label film is not likely to produce buckling problems, and surface smoothness is higher so that In-mold label film preferably and is more uniformly crosslinking curing reaction with the plastic cement molten liquid for the type chamber for being injected into pattern, this Kind of magnetic suck effect is highly stable, this is because complete can be by being added the amount of the magnetic powder into the mixing slurry for the size of magnetic attraction It controls, in actual operation, engineering staff need to only be tested several times according to actual needs gropes that shaping mould can be obtained The inner sidewall of type chamber, the relationship of magnetic powder material and magnetic powder quantity and magnetic attraction carry out flexible modulation, however, electrostatic in subsequent Absorption be it is highly unstable, be very unlikely to control, be entirely to realize adsorption capacity by charge extremely rambunctious, therefore, need To ensure to mitigate the interference of Electrostatic Absorption by the way that antistatic agent is added, improve the precision of magnetic suck.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (10)

1. a kind of in-mold label film, which is characterized in that including：

Polymer base material film, the polymer base material film have the inner surface and the outer surface；

Silver print film, the silver print film include the first adhesive layer, silver-plated laser film, the second adhesive layer and transparency protected Layer, first adhesive layer are adhered on the outer surface of the polymer base material film, and the silver-plated laser film includes polymer-based Bottom and laser silver layer, the polymer-based bottom are adhered to first adhesive layer far from the polymer base material film On one side, the laser silver layer plating is set on one side of the polymer-based bottom far from first adhesive layer, Second adhesive layer is adhered on one side of the laser silver layer far from the polymer-based bottom, the transparent guarantor Sheath is adhered to second adhesive layer far from the laser silver layer one side；

Thermoplastic film in ethylene-vinyl acetate copolymer mould, thermoplastic film bonding is institute in the ethylene-vinyl acetate copolymer mould On the inner surface for stating polymer base material film, thermoplastic film is far from the polymer base material in the ethylene-vinyl acetate copolymer mould Netted exhaust grid is offered on the one side of film.

2. in-mold label film according to claim 1, which is characterized in that the polymer base material film with a thickness of 9 microns ~16 microns.

3. in-mold label film according to claim 1, which is characterized in that the laser silver layer is far from the macromolecule Laser mark part is set on the one side of basal layer.

4. in-mold label film according to claim 1, which is characterized in that the thickness of first adhesive layer and described second The thickness of adhesive layer is identical.

5. in-mold label film according to claim 1, which is characterized in that the silver print film with a thickness of 23 microns~ 34 microns.

6. the transparent protective layer is provided with multiple transparent lugs on the one side far from second adhesive layer.

7. in-mold label film according to claim 6, which is characterized in that between transparent lug described in each adjacent two away from From equal.

8. in-mold label film according to claim 7, which is characterized in that the transparent lug has drops structure.

9. in-mold label film according to claim 7, which is characterized in that the transparent lug has crescent shape structure.

10. a kind of preparation method of in-mold label film, which is characterized in that include the following steps：

Polymer base material film is provided；

First bonding agents are subjected to melting operation in advance, then then, will be plated on the outer surface coated in polymer base material film while hot The polymer-based end lamination of silver-colored laser film overlays in first bonding agents, after first bonding agents solidification, obtains the first bonding Layer；

Laser operation is carried out on the plating silver layer of the silver-plated laser film using laser technique, obtains laser Silver layer；

Second bonding agents are subjected to melting operation in advance, then are coated on the laser silver layer while hot, then while hot will be described The transparent protective layer of silver-plated laser film covers in second bonding agents, after second bonding agents solidification, obtains second Adhesive layer；

Ethylene-vinyl acetate copolymer is coated on the inner surface of polymer base material film, and total in the ethene-vinyl acetate Netted exhaust grid is formed on one side of the thermoplastic film far from the polymer base material film in polymers mould, obtains in-mold label film.