CN110055816A - A kind of heat-sensitive paper being applicable in bottomless paper label and its manufacturing method - Google Patents
A kind of heat-sensitive paper being applicable in bottomless paper label and its manufacturing method Download PDFInfo
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- CN110055816A CN110055816A CN201910471506.3A CN201910471506A CN110055816A CN 110055816 A CN110055816 A CN 110055816A CN 201910471506 A CN201910471506 A CN 201910471506A CN 110055816 A CN110055816 A CN 110055816A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/42—Coatings with pigments characterised by the pigments at least partly organic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/80—Paper comprising more than one coating
- D21H19/82—Paper comprising more than one coating superposed
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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Abstract
The present invention discloses a kind of heat-sensitive paper for being applicable in bottomless paper label and its manufacturing method, select the high-quality wood pulp body paper of high smoothness as bodystock paper, in the body paper face successively three painting bottom coating, heat-sensitive layer, protective layer coatings, wherein priming coat, heat-sensitive layer are using double roller soft calendaring ornamenting in machine, using the outer superpressure ornamenting of machine, final finished coated face smoothness >=2000s after protective layer coating is dry.Compared with prior art, the heat-sensitive paper of this programme production has higher surface smoothness, low roughness, coating water-resistance is strong, the surface for being more suitable for bottomless paper label manufacture applies silicone oil and backsizing water, silicon layer, glue layer uniformity can do better in terms of quality stability and cost control.
Description
Technical field
The present invention relates to a kind of heat-sensitive paper for being applicable in bottomless paper label and its manufacturing methods.
Technical background
In today that environmentally protective theory is rooted in the hearts of the people, bottomless paper label is since it is in terms of the feature of environmental protection and save the cost
Outstanding performance, so that Label Markets are higher and higher for its attention rate.Both at home and abroad for the exploitation and application of bottomless paper label
It is more and more.
No base stock thermal label is exactly generally to divide single layer without base stock using a kind of bottomless paper label of the heat-sensitive paper as plane materiel
Thermal label and two layers are without base stock thermal label.The bottomless paper label for needing to print generally can be in heat-sensitive paper coated face printing figure
Case, then one layer of silicone oil is applied on the surface of printing surface, prevent the mutual adhesion of adhesive label.Then tear line is set on label,
It conveniently tears and takes, finally wound.Although no base stock thermal label eliminates base stock, need to apply one layer in temperature-sensitive facestock surface
The silicon layer of cost costly, and the coating homogeneity of silicon layer is directly related to the gloss of the cost of manufacture, label surface
Uniformity continuously prints adaptability (including bid rate, print head set-off) etc..
The coating homogeneity of silicon layer generally has very greatly with coating apparatus, the surface characteristic for applying cloth base material (i.e. heat-sensitive paper)
Relationship, itself with regard to heat-sensitive paper, the requirement of Yao Shiying silicon layer coating, first coated face require higher smoothness (low
Roughness), silicon face water repellency with higher is secondly applied, reduces the infiltration of silicone oil to the greatest extent.Therefore, with the temperature-sensitive of top coating
Paper product is particularly suited for no base stock thermal label purposes.
Since domestic heat-sensitive paper market price competition is very fierce, the basic domestic procurement of bodystock paper used, it is huge at
Domestic body paper quality is very nearly the same with wood-free paper under this pressure.However existing bodystock paper surface sophistication generally compared with
Difference, the roughness for applying cloth base material largely affect the roughness of finished product.And generally the heat-sensitive paper with top coating is used for
Common label purposes, in order to adapt to continuously print and various printing conditions, the protective coating on surface generally all have compared with
Good absorbability, coating is comparatively open, and be then easy to produce silicone oil for being coated with silicon layer migrates in coating, influences painting
The uniformity of layer also results in cost waste.Based on the above reasons, must add from the technological design for choosing coating, the production of body paper
Optimization of work etc. is set about, and the temperature-sensitive paper product for being relatively suitable for bottomless paper label purposes can be just produced.
Summary of the invention
For the deficiency of above-mentioned existing bottomless paper label temperature-sensitive paper product, the present invention provides one kind and is applicable in bottomless paper label
Heat-sensitive paper and its manufacturing method.Set about optimizing from the technological design for choosing coating and production and processing etc. of body paper,
Obtain the temperature-sensitive paper product for being relatively suitable for bottomless paper label purposes.Specific technical solution is as follows:
Present invention firstly provides a kind of heat-sensitive papers for being applicable in bottomless paper label, and the heat-sensitive paper is from bottom to top successively by body paper, primary coat
Layer, heat-sensitive layer, protective layer composition；The primary coat layer component includes calcined kaolin, hollow sphere plastic pigments and styrene-butadiene latex；Institute
Stating temperature-sensitive layer component includes styrene-butadiene latex or polyvinyl alcohol and polyalkenes macromolecule resin water repellent agent；The protection layer component packet
Include modified polyvinylalcohol, crosslinking agent, polyalkenes macromolecule resin water repellent agent.Wherein, the body paper is preferably wood pulp body paper, is applied
Cloth cover smoothness >=90s, uncoated face smoothness >=50s.The total component of hollow sphere plastic pigments solid content Zhan in the priming coat
40% or more of solid quality.
Also a kind of heat-sensitive paper manufacturing method for being applicable in bottomless paper label of the present invention, comprises the following steps that
S1: prepare substrate: selecting coated face smoothness >=90s, the wood pulp body paper of uncoated face smoothness >=50s is as coating base
Material；
S2: it prepares bottom coating: water is added in preparation tank, starting stirring is added inorganic dispersant, is slowly added to calcining kaolinite
Soil, 600rpm high speed dispersion 60min, adds hollow sphere plastic pigments, styrene-butadiene latex, lubricant and defoaming agent, and 100rpm is low
After speed stirring 20min, coating solid content is measured, forms priming coat coating fluid, it is spare；
S3: preparation temperature-sensitive coating: being added a small amount of water in heat-sensitive layer preparation tank, and starting stirring sequentially adds dispersing agent, lightweight
Calcium carbonate lapping liquid, color developing agent lapping liquid, leuco dye lapping liquid, sensitizer lapping liquid stir 40min under 300rpm revolving speed,
Styrene-butadiene latex or PVA glue, wetting agent, lubricant, polyalkenes macromolecule resin water repellent agent and defoaming agent are sequentially added, is continued
30min is stirred, coating solids are detected and water is added to be adjusted to preset value, forms heat-sensitive layer coating fluid, it is spare；
S4: preparation protection coating: adding water in preparation tank, start stirring, sequentially adds dispersing agent, precipitated calcium carbonate grinding
Liquid, modified PVA solution, lubricant, crosslinking agent, polyalkenes macromolecule resin water repellent agent and defoaming agent, under the conditions of stirring at low speed
Continue to stir 40min, forms protective coating coating fluid, it is spare；
S5: Coating: each coating coating fluid prepared in step S2, S3 and S4 is squeezed into trough of coating machine respectively, is used
Gauge stick successively painting bottom coating, heat-sensitive layer, protective layer on the wood pulp body paper in step sl, and each layer uses hot air drying
Dry mode produces；Wherein, soft calendaring is carried out in the priming coat and heat-sensitive layer machine, the protective layer is coated with after drying outside by machine
Then supercalendering is cut, is cured, the finished product for being applicable in the heat-sensitive paper of bottomless paper label is made.
As a preferred technical scheme, in step S2, each component for preparing bottom coating is scored by weight
Not are as follows: 0.5~1.0 part of inorganic dispersant, 20~40 parts of calcined kaolin, 40~70 parts of hollow sphere plastic pigments, styrene-butadiene latex 5
~15 parts, 2~4 parts of calcium stearate lubricant, 1~2 part of defoaming agent.
In step S3, each component of the preparation temperature-sensitive coating is respectively as follows: 0.5~1 part of dispersing agent, light by weight
30~40 parts of matter calcium carbonate lapping liquid, 20~30 parts of color developing agent lapping liquid, 10~20 parts of leuco dye, sensitizer lapping liquid 5~
15 parts, 3~6 parts of PVA glue, 1~2 part of wetting agent, 2~3 parts of lubricant, 3~8 parts of polyalkenes macromolecule resin water repellent agent, disappear
0.5~1 part of infusion.
In step S4, each component of the preparation protection coating is respectively as follows: sodium polyacrylate disperant 1 by weight
~2 parts, 10~20 parts of precipitated calcium carbonate lapping liquid, 50~70 parts of modified PVA solution, octylphenol ethoxylate wetting agent 2~3
Part, 8~15 parts of zinc stearate lubricant, 2~3 parts of crosslinking agent, 5~10 parts of polyalkenes macromolecule resin water repellent agent, polyethers disappear
0.3~0.5 part of infusion.
The heat-sensitive paper manufacturing method, in step S5 when Coating, the preferred coating weight of prime coat is 4.0~5.0
g/m2, make it with a thickness of 5~6 μm；The preferred coating weight of heat-sensitive layer is 3.0~4.0 g/m2, make it with a thickness of 3~4 μm；
It is 1~2 g/m that the protective layer, which applies preferred cloth amount,2, make it with a thickness of 1.5~2.0 μm.
The beneficial effects of the present invention are:
For relatively existing bottomless paper label temperature-sensitive paper product, the present invention has following advantage:
The present invention selects the high high-quality wood pulp body paper of smoothness (body paper coated face smoothness >=90s, uncoated face smoothness >=50s)
As cloth layer is applied, in the body paper face, successively three painting bottom coating, heat-sensitive layer, protective layer coatings, priming coat, heat-sensitive layer are used
Double roller soft calendaring ornamenting in machine, using the outer superpressure ornamenting of machine after protective layer coating is dry, final finished coated face smoothness >=
2000s。
And coating process is designed according to the demand of each coating functional characteristics and bottomless paper label, priming coat is with hollow sphere
For main raw material(s), it is coated with and reaches higher flatness after soft calendaring in machine.Heat-sensitive layer, the design of protective coating process recipe add
The water-resistance and closure of strong coating, as far as possible reduction protective layer wet coating material are migrated toward heat-sensitive layer, keep each uniform coating thickness
Property.The coating of all three coatings carries out good defoaming from coating process is prepared into.Avoid bubble that coating process is brought to produce
Raw coating surface defect causes the uneven of subsequent painting silicon.And after painting plants machine, the outer multiple roll supercalendering of machine is carried out, further
The ornamenting for reinforcing paper surface, the front and back sides smoothness for improving product are conducive to apply the uniform of silicon process silicon layer and cementing
Property, it lays a good foundation for the cost control and stay in grade of bottomless paper label manufacture.
Compared with the band top coat heat-sensitive paper of existing market routine, the heat-sensitive paper of this programme production has higher smooth surface
Degree, low roughness, coating water-resistance is strong, and the surface for being more suitable for bottomless paper label manufacture applies silicone oil and backsizing water, silicone oil
Layer, glue layer uniformity can do better in terms of quality stability and cost control；And the preferably good wood of this programme
Body paper is starched, the tensile strength of body paper, tearability are high, and stiffness is good, are conducive to the subsequent cross cutting waste discharge production high efficiency of bottomless paper label
And bid is more smooth in printing.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram for the heat-sensitive paper that the present invention is applicable in bottomless paper label.
In figure: 1, substrate layer；2, priming coat；3, heat-sensitive layer；4, protective layer.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment, to skill of the invention
Art scheme is clearly and completely described.
Embodiment 1:
A kind of heat-sensitive paper being applicable in bottomless paper label, as shown in Figure 1, it is from bottom to top successively by substrate layer 1, priming coat 2, temperature-sensitive
Layer 3, protective layer 4 form.The substrate layer 1 is preferably wood pulp body paper, coated face smoothness >=90s, uncoated face smoothness
≥50s.Contain calcined kaolin, hollow sphere plastic pigments and styrene-butadiene latex, and the middle hollow sphere in 2 component of priming coat
40% or more of the total component solid quality of plastic pigments solid content Zhan.Contain styrene-butadiene latex or poly- second in 3 component of heat-sensitive layer
Enol contains polyalkenes macromolecule resin water repellent agent as adhesive.Contain modified poly ethylene in 4 component of protective layer
Alcohol, crosslinking agent, polyalkenes macromolecule resin water repellent agent.
Embodiment 2: priming coat coating fluid is prepared
Firstly, weighing each component for preparing bottom coating by following parts by weight: 0.5~1.0 part of inorganic dispersant, calcining kaolinite
Native 20~40 parts, 40~70 parts of hollow sphere plastic pigments, 5~15 parts of styrene-butadiene latex, 2~4 parts of calcium stearate lubricant, defoaming agent
1~2 part.Then, water is added in preparation tank, starting stirring is added inorganic dispersant, is slowly added to calcined kaolin, 600rpm/
Min high speed dispersion 60min adds hollow sphere plastic pigments, styrene-butadiene latex, lubricant and defoaming agent, 100rpm/min low speed
After stirring 20min, coating solid content is measured, forms priming coat coating fluid, it is spare.
Embodiment 3: heat-sensitive layer coating fluid is prepared
Firstly, weighing each component of preparation temperature-sensitive coating by following parts by weight: 0.5~1 part of dispersing agent, precipitated calcium carbonate are ground
30~40 parts of liquid, 20~30 parts of color developing agent lapping liquid, 10~20 parts of leuco dye, 5~15 parts of sensitizer lapping liquid, PVA glue 3
~6 parts, 1~2 part of wetting agent, 2~3 parts of lubricant, 3~8 parts of polyalkenes macromolecule resin water repellent agent, 0.5~1 part of defoaming agent.
Then, a small amount of water is added in heat-sensitive layer preparation tank, starting stirring sequentially adds dispersing agent, precipitated calcium carbonate lapping liquid, colour developing
Agent lapping liquid, leuco dye lapping liquid, sensitizer lapping liquid stir 40min under 300rpm/min revolving speed, sequentially add PVA
Glue, wetting agent, lubricant, polyalkenes macromolecule resin water repellent agent and defoaming agent continue to stir 30min, and detection coating contains admittedly
It measures and water is added to be adjusted to preset value, form heat-sensitive layer coating fluid, it is spare.
Embodiment 4: protective layer coating fluid is prepared
Firstly, weighing each component of preparation protection coating: 1~2 part of sodium polyacrylate disperant, lightweight carbon by following parts by weight
10~20 parts of sour calcium lapping liquid, 50~70 parts of modified PVA solution, 2~3 parts of octylphenol ethoxylate wetting agent, zinc stearate
8~15 parts of lubricant, 2~3 parts of crosslinking agent, 5~10 parts of polyalkenes macromolecule resin water repellent agent, polyethers defoaming agent 0.3~0.5
Part.Then, in preparation tank plus water, start stirring, sequentially add dispersing agent, precipitated calcium carbonate lapping liquid, modified PVA solution,
Lubricant, crosslinking agent, polyalkenes macromolecule resin water repellent agent and defoaming agent continue to stir 40min, shape under the conditions of stirring at low speed
It is spare at protective coating coating fluid.
Embodiment 5: preparation is applicable in the heat-sensitive paper of bottomless paper label
Select coated face smoothness >=90s, uncoated face smoothness >=50s wood pulp body paper as applying cloth base material 1, by embodiment 2,
3, each layer coating fluid prepared in 4 is squeezed into trough of coating machine respectively, is then successively coated on wood pulp body paper using gauge stick
Priming coat 2, heat-sensitive layer 3, protective layer 4, the preferred coating weight of the prime coat 2 are 4.0~5.0 g/m2, make it with a thickness of 5~6
μm；The preferred coating weight of the heat-sensitive layer 3 is 3.0~4.0 g/m2, make it with a thickness of 3~4 μm；The protective layer 4 applies preferably
Cloth amount be 1~2 g/m2, make it with a thickness of 1.5~2.0 μm, and each layer is produced using heated-air drying mode.Wherein, the bottom
Soft calendaring is carried out in coating 2 and 3 machine of heat-sensitive layer, by supercalendering outside machine after the coating of protective layer 3 is dry.After coating
It cut, cured, the finished product for being applicable in the heat-sensitive paper of bottomless paper label is made, the temperature-sensitive paper product coated face smoothness >=
2000s。
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive.Although in addition, it should be understood that originally
Specification is described in terms of embodiments, but only includes not one technical solution, and this narrating mode of specification is only
It is only for clarity that the skilled in the art should refer to the specification as a whole, the technical solution in embodiment can also
To be properly combined, form other embodiments that can be understood by those skilled in the art.
Claims (10)
1. a kind of heat-sensitive paper for being applicable in bottomless paper label, it is characterised in that: including substrate layer, priming coat, heat-sensitive layer and protection
Layer；The substrate layer is wood pulp body paper, and the priming coat is coated on the coated face of body paper, on the protective layer coating layer,
The heat-sensitive layer is between priming coat and protective layer.
2. the heat-sensitive paper according to claim 1 for being applicable in bottomless paper label, it is characterised in that: the wood pulp body paper applies
Cloth cover smoothness >=90s, uncoated face smoothness >=50s.
3. the heat-sensitive paper according to claim 1 for being applicable in bottomless paper label, it is characterised in that: the priming coat is containing forging
The coating fluid for burning kaolin, hollow sphere plastic pigments and styrene-butadiene latex component is coated with；Wherein, the hollow sphere plastic pigments
40% or more of the total component solid quality of solid content Zhan.
4. the heat-sensitive paper according to claim 1 for being applicable in bottomless paper label, it is characterised in that: the heat-sensitive layer uses component
It is coated with containing the coating fluid of styrene-butadiene latex or polyvinyl alcohol and polyalkenes macromolecule resin water repellent agent.
5. the heat-sensitive paper according to claim 1 for being applicable in bottomless paper label, it is characterised in that: the protective layer uses component
In containing modified polyvinylalcohol, crosslinking agent and polyalkenes macromolecule resin water repellent agent coating fluid coating.
6. a kind of heat-sensitive paper manufacturing method for being applicable in bottomless paper label, it is characterised in that: comprise the following steps that
S1: prepare substrate: selecting coated face smoothness >=90s, the wood pulp body paper of uncoated face smoothness >=50s is as coating base
Material；
S2: it prepares bottom coating: water is added in preparation tank, starting stirring is added inorganic dispersant, is slowly added to calcining kaolinite
Soil, 600rpm high speed dispersion 60min, adds hollow sphere plastic pigments, styrene-butadiene latex, lubricant and defoaming agent, and 100rpm is low
After speed stirring 20min, coating solid content is measured, forms priming coat coating fluid, it is spare；
S3: preparation temperature-sensitive coating: being added a small amount of water in heat-sensitive layer preparation tank, and starting stirring sequentially adds dispersing agent, lightweight
Calcium carbonate lapping liquid, color developing agent lapping liquid, leuco dye lapping liquid, sensitizer lapping liquid stir 40min under 300rpm revolving speed,
Styrene-butadiene latex or PVA glue, wetting agent, lubricant, polyalkenes macromolecule resin water repellent agent and defoaming agent are sequentially added, is continued
30min is stirred, coating solids are detected and water is added to be adjusted to preset value, forms heat-sensitive layer coating fluid, it is spare；
S4: preparation protection coating: adding water in preparation tank, start stirring, sequentially adds dispersing agent, precipitated calcium carbonate grinding
Liquid, modified PVA solution, lubricant, crosslinking agent, polyalkenes macromolecule resin water repellent agent and defoaming agent, under the conditions of stirring at low speed
Continue to stir 40min, forms protective coating coating fluid, it is spare；
S5: Coating: each coating coating fluid prepared in step S2, S3 and S4 is squeezed into trough of coating machine respectively, is used
Gauge stick successively painting bottom coating, heat-sensitive layer, protective layer on the substrate in step sl, and each layer is all made of heated-air drying
Mode produces；Wherein, soft calendaring is carried out in the priming coat and heat-sensitive layer machine, by super outside machine after the protective layer coating is dry
Grade press polish, is then cut, is cured, the finished product for being applicable in the heat-sensitive paper of bottomless paper label is made.
7. the heat-sensitive paper manufacturing method according to claim 6 for being applicable in bottomless paper label, it is characterised in that: in step S2,
The each component for preparing bottom coating is respectively as follows: 0.5~1.0 part of inorganic dispersant, calcined kaolin 20 by weight
~40 parts, 40~70 parts of hollow sphere plastic pigments, 5~15 parts of styrene-butadiene latex, 2~4 parts of calcium stearate lubricant, defoaming agent 1~2
Part.
8. the heat-sensitive paper manufacturing method according to claim 6 for being applicable in bottomless paper label, it is characterised in that: in step S3,
The each component of the preparation temperature-sensitive coating is respectively as follows: 0.5~1 part of dispersing agent, precipitated calcium carbonate lapping liquid 30 by weight
~40 parts, 20~30 parts of color developing agent lapping liquid, 10~20 parts of leuco dye, 5~15 parts of sensitizer lapping liquid, PVA glue 3~6
Part, 1~2 part of wetting agent, 2~3 parts of lubricant, 3~8 parts of polyalkenes macromolecule resin water repellent agent, 0.5~1 part of defoaming agent.
9. the heat-sensitive paper manufacturing method according to claim 6 for being applicable in bottomless paper label, it is characterised in that: in step S4,
The each component of the preparation protection coating is respectively as follows: 1~2 part of sodium polyacrylate disperant, precipitated calcium carbonate by weight
10~20 parts of lapping liquid, 50~70 parts of modified PVA solution, 2~3 parts of octylphenol ethoxylate wetting agent, zinc stearate lubrication
8~15 parts of agent, 2~3 parts of crosslinking agent, 5~10 parts of polyalkenes macromolecule resin water repellent agent, 0.3~0.5 part of polyethers defoaming agent.
10. the heat-sensitive paper manufacturing method according to claim 6 for being applicable in bottomless paper label, it is characterised in that: in step S5,
The coating weight of the prime coat is 4.0~5.0 g/m2；The coating weight of the heat-sensitive layer is 3.0~4.0 g/m2；The protective layer
Coating weight is 1~2 g/m2。
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| CN111038136A (en) * | 2019-12-19 | 2020-04-21 | 乐凯医疗科技有限公司 | Backing-paper-free thermosensitive recording material |
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| CN113832772A (en) * | 2021-10-19 | 2021-12-24 | 北京中远冀恒科技发展有限公司 | Thermosensitive synthetic label paper of preservative film plasticizer and preparation method thereof |
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