Background technology
Thermal shrink film label, be that a kind of ink special that adopts is printed on film label on film, in label application process, when heating (about 70 DEG C), shrink label just can shrink along the outline of container soon, is close to vessel surface.It has feature easy to use, and pole is applicable to special-shaped container.Because the transparency of film own is high, therefore label is bright in colour, good luster.Owing to having to pass through contraction when using, so there is the shortcoming of pattern modification, especially to the product being printed with bar code mark, have to pass through strict design and printing quality control, otherwise bar code quality after pattern deformation, will be caused defective.
Shrink Membrane cover label easy to process, sealing, anti-pollution, good to commodity protectiveness; Membrane cover is close to commodity, packs compact and can display of commodity moulding, is thus applicable to the irregular commodity packaging being difficult to pack: during cover tag labeling, need not use tackiness agent, and can obtain and glassy phase with transparency; The Omnibearing decorative of 360 ° can be provided packaging vessel; and can the merchandise newss such as the description of product be printed on label; make human consumer need not open the performance of packing and just can understand product: printing belongs to print (picture and text are inside Membrane cover) in film; can play the effect of protection trace, and label wear resisting property is better.But current most of shrink film bottle target printing factory still uses containing benzene, containing ketone ink printing.Containing benzene, containing ketone ink in the fabrication process, in printing process and finish using discarded after all can contaminate environment, human body is worked the mischief.Along with people are to the attention of environmental protection, replace containing benzene, the inexorable trend having become industry development containing the bottle printing ink of ketone with the bottle mark of environmental protection ink.In versatility, the thin-film material that Plastic Bottle mark is conventional has PVC, PET, OPS film.Traditional bottle mark take PVC film as base material, easily produces dioxins materials and not easily degrade after burning, larger to the pollution of environment.Current printing ink is on the market mostly for PVC base, and maximum compatible PVC and PET base material film, use extremely inconvenient.PET, OPS base material is the development trend of bottle mark base material, especially OPS shrinkable film because of it possess high shrinkage, intensity high, nonpoisonous and tasteless, food hygienic standard can be met by grease resistance, and moderate cost has become the first-selected base material in bottle head-stamp brush future.Market in urgent need is a kind of can print this three kinds of base materials not only environmental protection but also general novel product simultaneously.The urgent requirement that traditional non-environment-friendly ink of simple function has become market development is replaced with a kind of general environmental protection ink.
The technical barrier of current receipts universal contracting film ink is: shrink film glues bottle; The printing of different sorts shrink film needs different choice different printing ink; In printing process there is curling, mist version problem in shrink film; The not problem such as resistance to tetrahydrofuran (THF) when printing post shrinkage film is puted the palms together before one.
Summary of the invention
An object of the present invention is just to provide a kind of colored ink for printing heat contraction film label, this colored ink being used for printing heat contraction film label without benzene without the resistance to tetrahydrofuran (THF) of ketone, can be used for PVC, PET, OPS heat-shrinkable film base material, with the supporting printing of heat-shrinkable film after, shrink film is not curling, not scumming.Its printing meets environmental requirement, safety non-toxic, recyclable, and print post shrinkage film has very strong resistance to alcohol and resistance to tetrahydrofuran (THF) ability, solves when such film skin packaging is puted the palms together before one well and the compatible problem of glue.
Technical scheme of the present invention is: a kind of colored ink for printing heat contraction film label, and this ink raw material of following % by weight is made:
Acrylic resin, nitro-cotton, ternary chlorine vinegar resin, CAB resin, EVA resin, coloured pigment, auxiliary agent and thinner; Described auxiliary agent is polyethylene wax and aerosil;
Described thinner is Virahol, n-propyl acetate and propylene glycol monomethyl ether;
By weight percentage:
Acrylic resin 15%, nitro-cotton 4% or 5%, ternary chlorine vinegar resin 8% or 10% or 12% or 14%, CAB resin 11% or 12%, EVA resin 11% or 14%, coloured pigment 10%, auxiliary agent 2.5%, thinner 28.5% or 32.5% or 33.5% or 34.5%, total amount is 100%.
As preferably, this ink raw material of following % by weight is made
Acrylic resin 15%, nitro-cotton 5%, ternary chlorine vinegar resin 12%, CAB resin 11%, EVA resin 11%, PY12# yellow pigment 10%, polyethylene wax 1.5%, aerosil 1% and thinner 33.5%.
As preferably, described acrylic resin is Acoma-S5600 resin.
As preferably, described coloured pigment is one of PY12# yellow pigment, everbright fast red 4821,15:4 phthalocyanine blue pigment, charcoal blacks.
As preferably, described acrylic resins 15%, nitro-cotton 4%, ternary chlorine vinegar resin 14%, CAB resin 12%, EVA resin 14%, 15:4 phthalocyanine blue pigment 10%, polyethylene wax 1.5%, aerosil 1% and thinner 28.5%.
As preferably, described acrylic resins 15%, nitro-cotton 5%, ternary chlorine vinegar resin 10%, CAB resin 11%, EVA resin 14%, charcoal blacks 10%, polyethylene wax 1.5%, aerosil 1% and thinner 32.5%.
Two of object of the present invention is to provide a kind of preparation method preparing the above-mentioned colored ink for printing heat contraction film label.
Technical scheme is: a kind of preparation method preparing the above-mentioned colored ink for printing heat contraction film label, comprises the following steps:
1) get the raw materials ready; Weigh by composition and ratio;
2) batch mixing; Be uniformly mixed at mixed cylinder except aerosil and thinner;
3) grind; Compound is put into sand mill to carry out being ground to fineness and reach less than 10 μm and stop grinding;
4) inking; Add aerosil during inking and add thinner adjustment viscosity and reach thin-walled 3# and examine grace cup 15-25 second;
5) filter; The particle that filtering is greater than 10 μm, obtains ink product.
The present invention compared with prior art tool has the following advantages:
1, there is environment-protecting asepsis, bright in luster, fullness of shade is high.Shallow version transfer performance is excellent, and gradation reproduction is good.There is excellent drying property, resistance toly to rub, attachment fastness is good.Resistance to blocking is good, and printing can be rolled up and be put.Scraper adaptive is good.After printing, pattern fonts does not fade, and does not come off.Applicable base materials: various material heat-shrinkable film, various plastics film, does not need all kinds of films of Electrostatic Treatment, surface treated stretched polypropene film.Surface treated modified polypropylene film.This ink has very low frictional coefficient, nontoxic, less shrinking percentage to such an extent as to do not affect the contraction of film, does not affect the transparency of chalk simultaneously.Wherein, low-friction coefficient is that film is sewed up at a high speed necessary.Be suitable for the print speed of 30-120 m/min.
2, print viscosity: thin-walled 3# examines grace cup: 15-25 second, thin-walled 2# examines grace cup: 20-30 second.
3, binder of the present invention resin used is combination resin, and the main resin in combination resin is acrylic resin (softening temperature is more than 120 degree); Assisted resin is that Nitrocellulose, chlorine vinegar multipolymer, CAB and supple resin EVA(solve the curling problem of shrink film), main resin and assisted resin and softening agent have fabulous consistency.
4, thinner of the present invention adopts the mixture of Virahol, n-propyl acetate and propylene glycol monomethyl ether.
5, auxiliary agent adopts aerosil as anti-settling agent, adopts polyethylene wax as slipping agent and anti-wear agent, the ink that obtains resistance toly is rubbed, attachment fastness is good.
6, pigment adopts organic color pigment.
terminological interpretation
The one of Acoma-S5600 resin-propylene acid resin (softening temperature is more than 120 degree), it is the multipolymer of methyl methacrylate and butyl methacrylate, there is good solvent release and plasticizer-resistant performance, and have enough hardness and higher gloss.
In the present invention, if no special instructions, % refers to weight percent.
Embodiment
The general environment-friendly type natural color yellow ink of embodiment 1 thermal shrink film label
Take Acoma-S5600 resin 15%, nitro-cotton 5%, ternary chlorine vinegar resin 12%, CAB resin 11%, EVA resin 11%, PY12# yellow pigment 10%, polyethylene wax 1.5%, aerosil 1%, Virahol 15%, n-propyl acetate 11% and propylene glycol monomethyl ether 7.5% respectively.By Acoma-S5600 resin, nitro-cotton, ternary chlorine vinegar resin, CAB resin, EVA resin, PY12# yellow pigment and polyethylene wax after mixed cylinder is uniformly mixed, put into sand mill and carry out being ground to fineness and reach less than 10 μm and stop grinding.Add aerosil during inking and add ethanol, Virahol, n-propyl acetate and propylene glycol monomethyl ether adjustment viscosity and reach thin-walled 3# and examine grace cup 15-25 and can filter and package second.
Embodiment 2 thermal shrink film label general environment-friendly type natural color chilli oil ink takes Acoma-S5600 resin 15%, nitro-cotton 4%, ternary chlorine vinegar resin 8%, CAB resin 12%, EVA resin 14%, everbright fast red 482110%, polyethylene wax 1.5%, aerosil 1%, Virahol 15%, n-propyl acetate 11% and propylene glycol monomethyl ether 8.5% respectively.By Acoma-S5600 resin, nitro-cotton, ternary chlorine vinegar resin, CAB resin, EVA resin, everbright fast red 4821 and polyethylene wax after mixed cylinder is uniformly mixed, put into sand mill and carry out being ground to fineness and reach less than 10 μm and stop grinding.Add aerosil during inking and add Virahol, n-propyl acetate and propylene glycol monomethyl ether adjustment viscosity and reach thin-walled 3# and examine grace cup 15-25 and can filter and package second.
Embodiment 3 thermal shrink film label general environment-friendly type natural color blue oil ink takes Acoma-S5600 resin 15%, nitro-cotton 4%, ternary chlorine vinegar resin 14%, CAB resin 12%, EVA resin 14%, 15:4 phthalocyanine blue pigment 10%, polyethylene wax 1.5%, aerosil 1%, Virahol 14%, n-propyl acetate 6% and propylene glycol monomethyl ether 8.5% respectively.By Acoma-S5600 resin, nitro-cotton, ternary chlorine vinegar resin, CAB resin, EVA resin, 15:4 phthalocyanine blue pigment and polyethylene wax after mixed cylinder is uniformly mixed, put into sand mill and carry out being ground to fineness and reach less than 10 μm and stop grinding.Add aerosil during inking and add ethanol, Virahol, n-propyl acetate and propylene glycol monomethyl ether adjustment viscosity and reach thin-walled 3# and examine grace cup 15-25 and can filter and package second.
The general environment-friendly type black ink of embodiment 4 thermal shrink film label takes Acoma-S5600 resin 15%, nitro-cotton 5%, ternary chlorine vinegar resin 10%, CAB resin 11%, EVA resin 14%, charcoal blacks 10%, polyethylene wax 1.5%, aerosil 1%, Virahol 18%, n-propyl acetate 11% and propylene glycol monomethyl ether 3.5% respectively.By Acoma-S5600 resin, nitro-cotton, ternary chlorine vinegar resin, CAB resin, EVA resin, charcoal blacks 10% and polyethylene wax after mixed cylinder is uniformly mixed, put into sand mill and carry out being ground to fineness and reach less than 10 μm and stop grinding.Add aerosil during inking and add Virahol, n-propyl acetate and propylene glycol monomethyl ether adjustment viscosity and reach thin-walled 3# and examine grace cup 15-25 and can filter and package second.