CN104960250A - Paper plastic cup and production technology thereof - Google Patents
Paper plastic cup and production technology thereof Download PDFInfo
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- CN104960250A CN104960250A CN201510290540.2A CN201510290540A CN104960250A CN 104960250 A CN104960250 A CN 104960250A CN 201510290540 A CN201510290540 A CN 201510290540A CN 104960250 A CN104960250 A CN 104960250A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/02—Letterpress printing, e.g. book printing
- B41M1/04—Flexographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a paper plastic cup and a production technology thereof. The paper plastic cup orderly comprises a plastic layer, a printing ink layer, a paper layer and an inner plastic cup layer from inside to outside. The paper layer and the inner plastic cup layer are bonded by multiple binder points. The thickness of the plastic layer is in a range of 8-12 micrometers. The printing ink layer utilizes aqueous printing ink or UV-cured printing ink. The production technology utilizes rolling paper flexible printing, is free of single paper cutting, has a high automation degree and improves production efficiency. Through an extrusion film-formation process, the plastic layer does not contain a binder, a solvent and printing ink peculiar smell so that the fresh milk packaged by the plastic layer has no peculiar smell and satisfies food production safety and health requirements. The paper plastic cup has small thickness, saves raw materials, reduces a cost, saves energy, is environmentally friendly, has no peculiar smell and satisfies food production safety and health requirements.
Description
Technical field
The present invention relates to a kind of liquid food packing field, particularly a kind of paper cup and production technology thereof.
Background technology
At present, paper cup be packaged in the packing of product of fresh milk, Yoghourt and milk tea in the ascendant.The product cup body of paper cup on market, its material from outside to inside, is generally: ground floor is BOPP layer, and the second layer is printing-ink, and third layer is paper, and the 4th layer is tack coat, and layer 5 is plastics PP or PS.Its production technology is: sheet-fed offset printing-paper surface overlay film BOPP-is die-cut to the scraps of paper, then is bonded with becoming shape cup PP or PS cup by adhesive.
Not only there is the low defect of production efficiency in above-mentioned production technology, and in the operating process of paper surface overlay film BOPP, paper and BOPP film are bonded together by general adhesive, except adhesive environmental pollution and health are harmful to, this coating technique easily causes surface smoothness poor, and existing paper cup production technology adopts thicker paper, BOPP film thickness palpus more than 18 μm.Add in conventional production technology and additionally use offset printing.Offset printing is commonly called as mimeograph, and adopt oil-soluble ink, its print image quality is higher than flexo, but VOC discharge is high, has the risk of harm Environmental security, printing worker's health.The defect of offset printing mainly contains following three aspects: one is the organic compound gas pollution problem that offset printing ink solvent produces, the solvent that offset ink uses is mainly containing aromatic mineral oil solvent, isopropyl alcohols etc., and these bring pollution to workman's operation and environment; Two is that the discharging of waste liquid such as fountain solution, cleaning agent pollutes, these fountain solutions multiplex isopropyl alcohols fountain solution; Three is heavy metal pollution in offset ink.Offset printing paper easily produces ink peculiar smell, due to liquid food, particularly fresh milk and Yoghourt have packaging and environmental odors absorbent properties preferably, be very easy to absorb organic solvent smell in ink and cause product peculiar smell, had a strong impact on the edible safety of consumer.Simultaneously during prior art employing sheet-fed offset printing, be generally art post paperboard, paper is thicker, and usual grammes per square metre is>=200g/m
2.
Flexo is commonly called as watermark, adopt water-based ink, or UV uv curing ink, its print product residual solvent is few, ink peculiar smell is low, safety and Health environmental protection, and thus flexo has good environmental performance, be considered to green printing, be widely used in the higher food of odor requirements and Key works Drug packing printing.Flexo is the technique that dixie cup printing mainly uses at present.But in prior art, flexo is not applied in the production technology of paper cup.
Therefore, research and develop a kind of more energy-conservation, safety and environmental protection, production efficiency are high and without ink peculiar smell, adhesive consumption few, almost the paper cup of no solvent residue be problem demanding prompt solution.
Summary of the invention
Technical problem to be solved by this invention is that in the production process overcoming paper cup in prior art, production efficiency is low, there is adhesive environmental pollution, insalubrity, easily cause surface smoothness difference and BOPP film thickness palpus more than 18 μm in coating technique, and the defect adopting offset printing easily to produce ink peculiar smell, work the mischief to environment and person health, provide a kind of paper cup and production technology thereof.Production technology of the present invention, have employed reel paper flexo, without the need to cutting into sheet-fed, automaticity is high, improves production efficiency; Film technique is extruded in utilization, need not add adhesive, no solvent residue, and without ink peculiar smell, packaging fresh milk almost free from extraneous odour is complained, and more meets the safety and health request of food production; The cup body thinner thickness of paper cup, conservation, reduces cost, more energy saving standard, and solvent-free peculiar smell, more meet the safety and health request of food production.
The present invention solves the problems of the technologies described above by the following technical programs.
The invention provides a kind of paper cup, its glass of body comprises in a plastic layer, a printing ink layer, a paper layer and from outside to inside successively moulds cup layer; Described paper layer and described in mould cup layer and bonded by several adhesive points;
The thickness of described plastic layer is 8 ~ 12 μm; The ink that described printing ink layer uses is water color ink or UV cured printing ink.
Wherein, the material of described plastic layer is conventional in this area, is preferably low density polyethylene (LDPE) (LDPE) or polypropylene (PP).Described low density polyethylene (LDPE) is conventional in this area, is preferably the 1C7A of Yanshan Petrochemical company.Described polypropylene is conventional in this area, is preferably the FC-9413 of the private Co., Ltd of Singapore's polyolefin.
Wherein, when the pattern of described printing ink layer is used by reality by this area routine, the outward appearance that needs of packaged product determines.Described water color ink is conventional in this area, is preferably the water-borne acrylic resin ink of Shanghai Sheng Weike ink Co., Ltd.Described UV cured printing ink is conventional in this area, is preferably the flexo UV ink of Hang Hua ink chemistry company.
Wherein, described paper layer adopts conventional coated printing paper in this area, is commonly called as art paper, and usual grammes per square metre is>=90g/m
2, be preferably 100 ~ 150g/m
2.
Wherein, the material of moulding cup layer in described is conventional in this area, is preferably polyethylene, polypropylene or polystyrene.
The invention provides a kind of production technology of described paper cup, it comprises the steps:
(1) paper is through flexographic printing, and form a printing ink layer on a surface of described paper, wherein, the ink that flexographic printing uses is water color ink or UV cured printing ink;
(2) by extruding film technique, a plastic layer is formed on described printing ink layer surface; The thickness of described plastic layer is 8 ~ 12 μm;
(3) the paper shape by die-cutting of described printing ink layer, described plastic layer will be adhered to successively, form the scraps of paper;
(4) adhesive is adopted to be bonded with interior cup of moulding on the non-plastic layer of step (3) described scraps of paper surface.
In step (1), described flexographic printing is routine operation in this area, and general employing set type flexible printing press, realizes multicolor overprint.When the pattern of described printing ink layer is used by reality by this area routine, the outward appearance that needs of packaged product determines.
In step (1), in described flexographic printing, for guaranteeing on forme that each site can both inking, preferably select the reticulate pattern line number >=350 line/inch of anilox roll, the screen frequency >=150 line/inch of printing.
In step (1), described paper is conventional coated printing paper in this area, is commonly called as art paper, and usual grammes per square metre is>=90g/m
2, be preferably 100 ~ 150g/m
2.
In step (1), described water color ink is conventional in this area, is preferably the water-borne acrylic resin ink of Shanghai Sheng Weike ink Co., Ltd.Described UV cured printing ink is conventional in this area, is preferably the flexo UV ink of Hang Hua ink chemistry company.
In step (2), described film technique of extruding can adopt routine in this area to extrude compounding machine, described film technique of extruding preferably is carried out in the steps below: extruded by T-shaped die head after spiro rod plasticizing by plastic pellet, be attached to printing ink layer surface after stretching, after cooling and shaping, form plastic layer.Extruding without the need to adhesive in film technique, no solvent residue.
Wherein, described plastic pellet is conventional in this area, is preferably low density polyethylene (LDPE) (LDPE) or polypropylene (PP).Described low density polyethylene (LDPE) is conventional in this area, is preferably the 1C7A of Yanshan Petrochemical company.Described polypropylene is conventional in this area, is preferably the FC-9413 of the private Co., Ltd of Singapore's polyolefin.When described plastic pellet is low density polyethylene (LDPE), the melt temperature formed after plastic pellet plasticizing is preferably 300 ~ 350 DEG C, is more preferably 320 ~ 340 DEG C; When described plastic pellet is polypropylene, the melt temperature formed after plastic pellet plasticizing is preferably 270 ~ 330 DEG C, is more preferably 280 ~ 290 DEG C.
In step (2), extruding in film technique, the air gap distance between die lip to chill roll is preferably 80 ~ 120mm.Die lip is the slit shape mouth mould extruding the T-shaped die head of compounding machine, and chill roll is for cooling and shaping after extruding melting plastic pellet and base material paper surface and fitting.Air gap distance refers to that the resin of melting shape leaves the segment distance contacted with air between the die lip arrival chill roll of T-shaped die head, and it is relevant with compound fastness, transparency etc.
In step (3), described shape by die-cutting is routine operation in this area, preferably carries out in the steps below: the paper of coated printing ink layer, plastic layer is successively cut into the fan-shaped scraps of paper by die-cutting rule.Described cross cutting can adopt full-automatic flat-press flat-die cutting marking press conventional in this area to carry out, and usually adopt steel end template and the soft cutter of the low cutting edge of a knife or a sword of band to carry out cross cutting paper, after cross cutting, otch is bright and clean without burr.Die-cutting process quality depends on precision and the reasonable selection of die-cutting machine, die cutting plate and die-cutting rule etc.The scraps of paper after shape by die-cutting mould the shape of cup in should meeting.
In step (4), described is bonded as this area routine operation, preferably carry out in the steps below: pass through paper cup molding, step (3) the described scraps of paper are puted the palms together before one with ultrasonic wave after curling, then adhesive is adopted to be bonded with interior cup of moulding on the non-plastic layer of described scraps of paper surface.Described ultrasonic wave is puted the palms together before one as routine operation in this area.
In step (4), described adhesive is conventional in this area, and being preferably white glue with vinyl or PUR, is more preferably white glue with vinyl, is QY-3072, QY-329 of Pamir, Jiashan latex paint factory or the Q2283 of Henkel KGaA company best.
In step (4), it is conventional in this area for moulding cup in described, is generally polyethylene cup, polypropylene cup or polystyrene cup, can injection mo(u)lding, also can be plastics sucking moulding.According to this area general knowledge, when interior to mould cup be polypropylene material time, it may be used for hot drink, as milk tea packaging, the heating using microwave of fresh milk packaging cup are drunk; When interior to mould cup be polystyrene material time, generally can not be used for hot drink or heating uses.The resin that general polypropylene plastic uptake cup adopts is preferably the PP1005 of Yongjia, Taiwan container Co., Ltd.The resin that general polystyrene plastic uptake cup adopts is preferably impact resistance polystyrene (HIPS), and the trade mark is match section 622, match section 532 or platformization 8250.
In step (4), mould cup generally different according to amount of capacity in described, conventional 200ml capacity cup, weight is about 6g.
In step (4), in the process of described bonding, preferably without the need to the full version in described non-plastic layer surface is coated with adhesive, only need put several adhesive points.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can be combined, obtain the preferred embodiments of the invention.
Agents useful for same of the present invention and raw material are all commercially.
Positive progressive effect of the present invention is:
1, paper cup of the present invention is compared with the paper cup of conventional offset compound, and because paper is thinner, usual grammes per square metre is>=90g/m
2, plastic layer is thinner, is 8 ~ 12 μm of thickness films, therefore cup body thinner thickness, conservation, reduces cost, more energy saving standard, and solvent-free peculiar smell, more meet the safety and health request of food production; Compared with dixie cup, it has higher intensity and leakproof, directly contacts the worry of consumer without ink; With mould compared with cup, it has better printing performance, wider merchandise display effect, and saves plastic raw materials.
2, production technology of the present invention, adopt roll web directly to carry out flexo, without the need to cutting into sheet-fed, improve production efficiency, automaticity is high; Film technique is extruded in utilization need not add adhesive, no solvent residue by the plastic pellet film of melting in the process of paper surface formation plastic foil, and without ink peculiar smell, packaging fresh milk almost free from extraneous odour is complained, and more meets the safety and health request of food production.
Accompanying drawing explanation
Fig. 1 is the schematic cross-section of paper cup prepared by embodiment 1; Wherein, 1 is plastic layer, and 2 is printing ink layer, and 3 is paper layer, 4 be in mould cup layer, 5 is adhesive.
Detailed description of the invention
Mode below by embodiment further illustrates the present invention, but does not therefore limit the present invention among described scope of embodiments.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or selects according to catalogue.
Embodiment 1
The preparation method of the paper cup of the present embodiment comprises the steps:
(1) adopt set type flexible printing press by paper through flexographic printing, form a printing ink layer on a surface of paper; Wherein, the ink of employing is the water-borne acrylic resin ink of Shanghai Sheng Weike ink Co., Ltd; Paper grammes per square metre number is 100g/m
2; In described flexographic printing, for guaranteeing on forme that each site can both inking, select the reticulate pattern line number>=350 line/inch of anilox roll, the screen frequency>=150 line/inch of printing;
(2) compounding machine is extruded in employing, extrudes film technique and carries out in the steps below: extruded by T-shaped die head after spiro rod plasticizing by plastic pellet, be attached to printing ink layer surface after stretching, form a plastic layer after cooling and shaping; Extruding without the need to adhesive in film technique, no solvent residue;
Wherein, plastic pellet is Yanshan Petrochemical company model is the LDPE of 1C7A, and after plastic pellet plasticizing, the temperature of melt is 300 DEG C; The thickness of plastic layer is 8 μm; Air gap distance between die lip to chill roll is 80mm;
(3) by adhere to successively printing ink layer, plastic layer paper by full-automatic flat-press flat-die cutting marking press, adopt steel end template and the soft cutter of the low cutting edge of a knife or a sword of band to be cut into the fan-shaped scraps of paper; After cross cutting, otch is bright and clean without burr, and the scraps of paper after shape by die-cutting mould the shape of cup in should meeting;
(4) adopt paper cup molding, step (3) scraps of paper puted the palms together before one with ultrasonic wave after curling, then adopt adhesive to be bonded with interior cup of moulding on the non-plastic layer of scraps of paper surface; Wherein step (3) scraps of paper non-plastic layer on the surface, be coated with adhesive without the need to version will be expired, only need put several adhesive points;
Wherein, that adhesive adopts is the QY-3072 of Pamir, Jiashan latex paint factory; Inside mould the polyethylene cup that cup is the 200ml of commercially available routine, weight is about 6g.
Fig. 1 is the schematic cross-section of paper cup prepared by embodiment 1; Wherein, 1 is plastic layer, and 2 is printing ink layer, and 3 is paper layer, 4 be in mould cup layer, 5 is adhesive.
Embodiment 2
The present embodiment is except following condition, and all the other controlled conditions are identical with embodiment 1.
(1) paper grammes per square metre number is 130g/m
2; The ink adopted is the flexo UV ink of Hang Hua ink chemistry company
(2) extrude in film technique, the melt temperature after plasticizing is 340 DEG C, and the thickness of plastic layer is 10 μm; Air gap distance between die lip to chill roll is 100mm;
(3) that adhesive adopts is the QY-329 of Pamir, Jiashan latex paint factory; Inside mould the polystyrene cup that cup is the 200ml of commercially available routine, weight is about 6g.
Embodiment 3
The present embodiment is except following condition, and all the other controlled conditions are identical with embodiment 1.
(1) paper grammes per square metre number is 150g/m
2;
(2) extrude in film technique, the melt temperature after plasticizing is 320 DEG C, and the thickness of plastic layer is 12 μm; Air gap distance between die lip to chill roll is 120mm.
(3) that adhesive adopts is the Q2283 of Henkel KGaA company; Inside mould the polystyrene cup that cup is the 200ml of commercially available routine, weight is about 6g.
Embodiment 4
The present embodiment is except following condition, and all the other controlled conditions are identical with embodiment 1.
Extrude in film technique, plastic pellet is the FC-9413 of the private Co., Ltd of Singapore's polyolefin, and the melt temperature after plasticizing is 280 DEG C, and the thickness of plastic layer is 9 μm; Air gap distance between die lip to chill roll is 90mm.
Embodiment 5
The present embodiment is except following condition, and all the other controlled conditions are identical with embodiment 1.
Extrude in film technique, plastic pellet is the FC-9413 of the private Co., Ltd of Singapore's polyolefin, and the melt temperature after plasticizing is 330 DEG C, and the thickness of plastic layer is 12 μm; Air gap distance between die lip to chill roll is 120mm.
Comparative example 1
The paper cup manufacturer of this comparative example is Shanghai Tian Hengzhi container Co., Ltd, and from outside to inside, ground floor is BOPP layer to its material, and the second layer is adhesive layer, and third layer is printing-ink, and the 4th layer is paper, and layer 5 is tack coat, and layer 6 moulds cup in being.Its production technology is: sheet-fed offset printing-paper surface adhesive overlay film BOPP-is die-cut to the scraps of paper, then is bonded by adhesive and interior cup of moulding.
Effect example
Compared by the paper cup of the paper cup of embodiment 1 and comparative example 1, its comparative result is as shown in table 1.As shown in Table 1, compared with comparative example 1, the adhesive consumption of the embodiment of the present invention 1, solvent residual amount obviously reduce, more energy-conserving and environment-protective, meet the hygienic requirements of food security; The paper cup cup body deflection of embodiment 1 is when meeting application demand, and deflection, the cup body thickness of cup body are significantly less than comparative example 1, have greatly saved raw material, have reduced cost.And the technique of the production technology of the embodiment of the present invention 1 owing to adopting roll web to carry out flexo, without the need to roll web is cut into sheet-fed, improve production efficiency, automaticity is higher.
Table 1
The paper cup of the paper cup of embodiment 1 and comparative example 1 is carried out subjective appreciation, and subjective appreciation is completed by 6 assessment officers.Evaluation result is as shown in table 2.Paper cup packaging material subjective appreciation carries out with reference to 6.6.16.2, SN/T3179-2012 in GB/T10004-2008; Content subjective appreciation carries out with reference to GB/T25006-2010, and embodiment 1 and comparative example 1 are the bright excellent times of fresh milk of the filling 200ml of identical capacity paper cup, and paper cup seal cover membrane structure is PET/Al/EVA, and epiphragma supplier is Zhejiang Goldstone Package Co., Ltd.
As shown in Table 2, compared with comparative example 1, embodiment 1 due to adhesive consumption in preparation technology few, no solvent residue, without ink peculiar smell, be applicable to packaging fresh milk, more meet food safety and sanitation requirement.
Table 2
Paper cup prepared by embodiment 2-5 is suitable with paper cup technique effect prepared by embodiment 1.
Claims (10)
1. a paper cup, is characterized in that, its glass of body comprises in a plastic layer, a printing ink layer, a paper layer and from outside to inside successively moulds cup layer; Described paper layer and described in mould cup layer and bonded by several adhesive points;
The thickness of described plastic layer is 8 ~ 12 μm; The ink that described printing ink layer uses is water color ink or UV cured printing ink.
2. paper cup as claimed in claim 1, it is characterized in that, the material of described plastic layer is low density polyethylene (LDPE) or polypropylene;
The grammes per square metre of described paper layer is>=90g/m
2, be preferably 100 ~ 150g/m
2;
And/or the material of moulding cup layer in described is polyethylene, polypropylene or polystyrene.
3. a production technology for paper cup as claimed in claim 1 or 2, is characterized in that, it comprises the steps:
(1) paper is through flexographic printing, and form a printing ink layer on a surface of described paper, wherein, the ink that flexographic printing uses is water color ink or UV cured printing ink;
(2) by extruding film technique, a plastic layer is formed on described printing ink layer surface; The thickness of described plastic layer is 8 ~ 12 μm;
(3) the paper shape by die-cutting of described printing ink layer, described plastic layer will be adhered to successively, form the scraps of paper;
(4) adhesive is adopted to be bonded with interior cup of moulding on the non-plastic layer of step (3) described scraps of paper surface.
4. production technology as claimed in claim 3, is characterized in that, in step (1), in described flexographic printing, selects the reticulate pattern line number >=350 line/inch of anilox roll, the screen frequency >=150 line/inch of printing;
And/or in step (1), described paper grammes per square metre is>=90g/m
2, be preferably 100 ~ 150g/m
2.
5. production technology as claimed in claim 3, it is characterized in that, in step (2), described in extrude film technique and carry out in the steps below: plastic pellet is extruded by T-shaped die head after spiro rod plasticizing, be attached to printing ink layer surface after stretching, after cooling and shaping, form plastic layer.
6. production technology as claimed in claim 5, it is characterized in that, described plastic pellet is low density polyethylene (LDPE) or polypropylene; When described plastic pellet is low density polyethylene (LDPE), the melt temperature formed after plastic pellet plasticizing is preferably 300 ~ 350 DEG C, is more preferably 320 ~ 340 DEG C; When described plastic pellet is polypropylene, the melt temperature formed after plastic pellet plasticizing is preferably 270 ~ 330 DEG C, is more preferably 280 ~ 290 DEG C.
7. production technology as claimed in claim 3, it is characterized in that, in step (2), extruding in film technique, the air gap distance between die lip to chill roll is 80 ~ 120mm.
8. production technology as claimed in claim 3, it is characterized in that, in step (3), described shape by die-cutting carries out in the steps below: the paper of coated printing ink layer, plastic layer is successively cut into the fan-shaped scraps of paper by die-cutting rule.
9. production technology as claimed in claim 3, it is characterized in that, in step (4), described bonding is carried out in the steps below: pass through paper cup molding, step (3) the described scraps of paper are puted the palms together before one with ultrasonic wave after curling, then adhesive is adopted to be bonded with interior cup of moulding on the non-plastic layer of described scraps of paper surface;
In step (4), described adhesive is white glue with vinyl or PUR;
And/or in step (4), moulding cup in described is polyethylene cup, polypropylene cup or polystyrene cup.
10. production technology as claimed in claim 3, is characterized in that, in step (4), in the process of described bonding, without the need to by the full version gluing in described non-plastic layer surface, only need put several glue points.
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| CN201510290540.2A CN104960250A (en) | 2015-05-29 | 2015-05-29 | Paper plastic cup and production technology thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109235144A (en) * | 2018-08-02 | 2019-01-18 | 山东省产品质量检验研究院 | A kind of paper cup and its preparation process |
| CN109940923A (en) * | 2019-03-22 | 2019-06-28 | 李晓鹏 | A kind of processing technology of container of wipes |
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