CN117567893A - Soft light belt core for correction belt, preparation method of soft light belt core and correction belt - Google Patents
Soft light belt core for correction belt, preparation method of soft light belt core and correction belt Download PDFInfo
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- CN117567893A CN117567893A CN202311530134.XA CN202311530134A CN117567893A CN 117567893 A CN117567893 A CN 117567893A CN 202311530134 A CN202311530134 A CN 202311530134A CN 117567893 A CN117567893 A CN 117567893A
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- pigment
- core
- belt
- correction
- soft
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- 238000012937 correction Methods 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 67
- 239000004611 light stabiliser Substances 0.000 claims abstract description 8
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 8
- 239000000049 pigment Substances 0.000 claims description 56
- 238000000576 coating method Methods 0.000 claims description 48
- 239000011248 coating agent Substances 0.000 claims description 46
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 35
- 239000002245 particle Substances 0.000 claims description 21
- 238000000227 grinding Methods 0.000 claims description 19
- 239000004408 titanium dioxide Substances 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 16
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 14
- 239000012752 auxiliary agent Substances 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000000873 masking effect Effects 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000005060 rubber Substances 0.000 claims description 7
- 239000012463 white pigment Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- 230000008033 biological extinction Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 1
- 206010034960 Photophobia Diseases 0.000 abstract 1
- 208000013469 light sensitivity Diseases 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 56
- 229920000139 polyethylene terephthalate Polymers 0.000 description 27
- 239000005020 polyethylene terephthalate Substances 0.000 description 27
- 239000012790 adhesive layer Substances 0.000 description 21
- 230000032683 aging Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000003963 antioxidant agent Substances 0.000 description 6
- 230000003078 antioxidant effect Effects 0.000 description 6
- 229920003049 isoprene rubber Polymers 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 238000007761 roller coating Methods 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229920003048 styrene butadiene rubber Polymers 0.000 description 6
- 239000000080 wetting agent Substances 0.000 description 6
- 239000000377 silicon dioxide Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L19/00—Erasers, rubbers, or erasing devices; Holders therefor
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/004—Reflecting paints; Signal paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention discloses a soft light belt core for a correction belt, a preparation method thereof and a correction belt containing the soft light belt core. In addition, as the light-resistant agent composed of the ultraviolet absorber and the light stabilizer is added in the formula, the light sensitivity of the soft light belt core for the correction belt is reduced, and the service life of the soft light belt core is prolonged.
Description
Technical Field
The invention relates to the technical field of matt coatings, in particular to a soft light belt core for a correction belt, a preparation method thereof and a correction belt containing the soft light belt core, which are mainly used for covering and correcting writing handwriting.
Background
The correction tape is a white opaque pigment similar to correction liquid, is used for correcting errors in writing of writing tools such as ball pens, neutral pens and pens, and has the advantages of being capable of being applied and written immediately, convenient and quick and the like. Among the existing correction products on the market, the correction tape has become one of the most widely used and full-specification products.
Along with the continuous improvement of the economic development degree, the correction tape is used as a novel correction product to be sold to tropical countries such as southeast Asia, africa and the like, and is inevitably contacted with various severe environments in the processes of storage, transportation and terminal display, such as a high-temperature environment during transportation of a centralized box in summer, an exposure environment during terminal display and the like, and various quality hidden hazards and quality complaints are brought to the correction tape product by the environments. None of the correction tape products on the market at hand focus on this problem.
On the other hand, with the continuous improvement of eye protection consciousness of consumers, the problem is not focused on the current correction tape products on the market, the general glossiness is in the range from high gloss to flat gloss, and few products can reach matte. The realization of the coating matt effect is a great difficulty for the correction tape product, because the application mode of the correction tape coating is completely opposite to that of a common coating, the correction tape coating is firstly coated on a base material (release film) and then transferred to articles such as paper and the like when in use, the surface of the correction tape coating is naturally high in flatness, the reflection problem is serious, and the problem can be solved only by comprehensively improving the pigment, the formula and the like of the coating.
Disclosure of Invention
The invention aims to solve the problems and provide a correction tape product which has the advantages of no light, eye protection, good heat resistance and good light resistance.
In particular, in order to achieve the above object, the present invention provides a soft light belt core for a correction belt, the belt core comprises a belt core coating, the belt core coating comprises a stripping layer, a covering agent layer and an adhesive layer in sequence, and the soft light belt core is characterized in that the covering agent layer comprises a low reflective pigment, and the 60 DEG glossiness of the covering agent layer is lower than 30GU, preferably lower than 25GU, lower than 20GU, lower than 15GU, lower than 10GU or lower than 8GU.
Further, the low-reflection pigment is a porous white pigment coated by inorganic extinction pigment and titanium dioxide pigment inner core through inorganic adhesive.
Further, the inorganic extinction pigment is calcium carbonate particles or silicon dioxide particles; the inorganic matting pigment has an average particle diameter of 0.10 to 0.30. Mu.m, preferably 0.10 to 0.15. Mu.m, 0.15 to 0.20. Mu.m, 0.20 to 0.25. Mu.m, 0.25 to 0.30. Mu.m, or 0.15. Mu.m; the titanium dioxide pigment core has an average particle diameter of 0.20 to 0.50. Mu.m, preferably 0.20 to 0.30. Mu.m, 0.30 to 0.40. Mu.m, 0.40 to 0.50. Mu.m, or 0.24. Mu.m.
Further, the low-reflection pigment is subjected to secondary grinding, and the particle size of the low-reflection pigment D50 is in the range of 300-500 nm.
Further, the mass ratio of inorganic binder to titanium dioxide pigment core is 30:70 to 15:85, preferably, 30:70 to 25:75, 25:75 to 20:80, 20:80 to 15:85 or 25:75.
Further, the components of the covering agent layer comprise, by weight: 25-35 parts of pigment, 3-5.5 parts of rubber and 1-2 parts of light fastness agent, wherein the pigment comprises at least 20 parts of low reflective pigment, preferably at least 26 parts, at least 28 parts, at least 30 parts, at least 32 parts or at least 34 parts of low reflective pigment.
Further, the light-resistant agent comprises an ultraviolet absorber and/or a light stabilizer, and the mass ratio of the ultraviolet absorber to the light stabilizer is 4:8-6:8.
The invention also provides a correction tape, which comprises the soft light tape core for any correction tape.
The invention also provides a preparation method of the soft light belt core for the correction belt, which comprises the following steps: step (1): preparing an initial low-reflection pigment;
step (2): dispersing and dissolving rubber in a solvent and heating to more than 80 ℃ to obtain a mixture A;
step (3): adding a light resistant agent, a low-reflection pigment and an auxiliary agent into the mixture A, and uniformly dispersing to obtain a mixture B;
step (4): carrying out secondary grinding on the mixture B to ensure that the particle size of the low-reflection pigment D50 is between 300 and 500nm, thereby obtaining covering agent slurry;
step (5): coating the masking agent slurry on a stripping layer, and drying at a high temperature of 80-120 ℃ to obtain a masking agent layer;
step (6): and uniformly coating the aqueous pressure-sensitive adhesive on the covering agent layer, and drying at a high temperature of 80-120 ℃ to obtain the soft light belt core for the correction belt.
Further, the step (1) specifically comprises:
step (1-1): dispersing titanium dioxide pigment and inorganic extinction pigment in water, and mixing into sodium silicate aqueous solution;
step (1-2): heating and stirring the solution prepared in the step (1-1), mixing sulfuric acid aqueous solution, adjusting pH to 7.0-7.5, and standing;
step (1-3): filtering the solution obtained in the step (1-1) and carrying out preliminary grinding on the filtered matter to obtain the initial low-reflection pigment.
The invention has the following beneficial effects:
1. the prior art only depends on the rubber itself to resist the environmental destruction, and can not timely stop the reaction when the rubber generates the photo-oxidative aging reaction, and can only passively bear the destruction, but the invention can respectively play roles in the early stage and the middle stage of photo-oxidative aging through the benzophenone ultraviolet absorber and the hindered amine light stabilizer, wherein the ultraviolet absorber can prevent ultraviolet light from reaching rubber molecules in the early stage, and the light stabilizer can capture free radicals generated after ultraviolet light irradiates high molecules in the middle stage, and cut off the photo-oxidative reaction to prevent the aging reaction, so the invention can prolong the resistance of products to sunlight.
2. In the prior art, untreated ordinary titanium dioxide and a smooth PET release film are adopted, when the untreated ordinary titanium dioxide is arranged under the nano-grade particle size, the surface of the untreated ordinary titanium dioxide is relatively smooth under the microcosmic condition, and the smooth PET release film is more smooth, so that the reflection of light is more. The titanium dioxide coated with silicon dioxide is used in the formula, and the sand grinding PET release film is matched at the same time, so that the coating achieves the soft light effect. The titanium dioxide coated with the silicon dioxide has a micro porous structure, the original particle size of the unground low-reflection pigment is in the range of 3-5 mu m, the reflection of light is less, and the frosted PET release film can enable the coating with the core of the correction tape to form a micro rough surface after being stripped from the PET release film, so that the purpose of no light is achieved.
3. The invention provides a soft light belt core for a correction belt, which comprises a stripping layer, a covering agent layer, an adhesive layer and a covering agent layer, and a preparation method of the soft light belt core. The components and the weights of the formulas of the various covering agent layers are used for preparing the belt core sample, and the coating adhesion performance, the coating covering performance, the coating re-writing performance, the glossiness and the coating ageing resistance of all the belt core samples are tested and compared, so that the soft light correction belt core provided by the invention has good adhesion performance, covering performance, writing performance and ageing resistance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a soft light belt core structure for a correction belt, which sequentially comprises a frosted stripping layer 01, a covering agent layer 02 and an adhesive layer 03.
Detailed Description
The detailed features and advantages of the present patent are described in detail in the following detailed description, which is sufficient to enable those skilled in the art to understand the technical disclosure of the patent and to practice it, and the related objects and advantages of the patent are readily understood by those skilled in the art from the description, claims and drawings disclosed herein.
Example 1
The soft light belt core for the correction belt provided in this example has a thickness of 15 μm of a frosted layer, 20 μm of a covering agent layer and 2 μm of an adhesive layer arranged in this order.
The stripping layer provided by the embodiment is a frosted PET release film (Nantongbao swallow), wherein the inner stripping force is 15-20g/25mm, and the outer stripping force is 8-13g/25mm. In addition to the polyester film PET release film in this embodiment, other material substrates can be developed laterally with reference to this embodiment.
Preparation of low-reflection pigment: 43g of titanium dioxide powder (average particle diameter: 0.24 μm) and 27.6g of calcium carbonate powder (average particle diameter: 0.15 μm) were dispersed in 273.2g of pure water. 38.8g of water glass (sodium silicate aqueous solution) was added to the solution and mixed to prepare a sodium silicate solution containing a titanium dioxide pigment and calcium carbonate. The solution was heated to 80 ℃ with stirring and 1.8wt% aqueous sulfuric acid was added continuously over 3 hours, adjusting the pH to 7.0-7.5. After standing for 6 hours, a composite pigment of titanium dioxide and calcium carbonate with silicon dioxide as a binder was obtained, and the low-reflective pigment of the present invention having an initial average particle diameter of 4.3 μm was obtained by filtration and grinding.
In other embodiments, in addition to calcium carbonate, microscopic inorganic materials such as silica may be used as matting pigments. In addition, the adjustment of the light-canceling effect can be achieved by adjusting the ratio of sodium silicate to titanium dioxide.
The formulation of the covering layer provided in this example is as follows by weight:
dispersing ethylene propylene rubber, isoprene rubber and styrene butadiene rubber in a solvent, heating to 90-100 ℃ to obtain a mixture A, adding a light resistant agent, a low-reflection pigment and an auxiliary agent into the mixture A, uniformly dispersing the auxiliary agent including a wetting agent, a lubricant and an antioxidant to obtain a mixture B, transferring the mixture B into grinding equipment for proper secondary grinding, enabling the particle size D50 of the white pigment to be positioned in a range of 350-450nm to obtain a covering agent slurry, coating the covering agent slurry on a frosted PET release film by adopting roller coating equipment, drying at a high temperature by adopting an oven at 90-110 ℃, and removing the solvent to obtain a covering agent layer.
The adhesive layer provided in this example is aqueous acrylic pressure-sensitive adhesive (PS-2020L, dow), the aqueous pressure-sensitive adhesive is uniformly coated on the covering agent layer by a stainless steel mesh roller, and the covering agent layer and the adhesive layer are sequentially laminated on the PET release film after drying at a high temperature in an oven at 90-110 ℃ and removing water.
Example 2
The soft light belt core for the correction belt provided in this example has a thickness of 15 μm frosted release layer, 20 μm masking agent layer and 2 μm adhesive layer which are sequentially arranged.
The stripping layer provided by the embodiment is a frosted PET release film (Nantongbao swallow), wherein the inner stripping force is 15-20g/25mm, and the outer stripping force is 8-13g/25mm.
The formulation of the covering layer provided in this example is as follows by weight:
dispersing ethylene propylene rubber, isoprene rubber and styrene butadiene rubber in a solvent, heating to 90-100 ℃ to obtain a mixture A, adding a light resistant agent, a low reflective pigment, a filler and an auxiliary agent into the mixture A, uniformly dispersing the auxiliary agent including a wetting agent, a lubricant and an antioxidant to obtain a mixture B, transferring the mixture B into grinding equipment for proper secondary grinding, enabling the particle size D50 of the white pigment to be positioned in a range of 350-450nm to obtain a covering agent slurry, coating the covering agent slurry on a frosted PET release film by adopting roller coating equipment, drying at a high temperature in an oven at 90-110 ℃, and removing the solvent to obtain the covering agent layer.
The adhesive layer provided in this example is aqueous acrylic pressure-sensitive adhesive (PS-2020L, dow), the aqueous pressure-sensitive adhesive is uniformly coated on the covering agent layer by a stainless steel mesh roller, and the covering agent layer and the adhesive layer are sequentially laminated on the PET release film after drying at a high temperature in an oven at 90-110 ℃ and removing water.
Example 3
The soft light belt core for the correction belt provided in this example has a thickness of 15 μm frosted release layer, 20 μm masking agent layer and 2 μm adhesive layer which are sequentially arranged.
The stripping layer provided by the embodiment is a frosted PET release film (Nantongbao swallow), wherein the inner stripping force is 15-20g/25mm, and the outer stripping force is 8-13g/25mm.
The formulation of the covering layer provided in this example is as follows by weight:
dispersing ethylene propylene rubber, isoprene rubber and styrene butadiene rubber in a solvent, heating to 90-100 ℃ to obtain a mixture A, adding a light resistant agent, a low reflective pigment, a filler and an auxiliary agent into the mixture A, uniformly dispersing the auxiliary agent including a wetting agent, a lubricant and an antioxidant to obtain a mixture B, transferring the mixture B into grinding equipment for proper secondary grinding, enabling the particle size D50 of the white pigment to be positioned in a range of 350-450nm to obtain a covering agent slurry, coating the covering agent slurry on a frosted PET release film by adopting roller coating equipment, drying at a high temperature in an oven at 90-110 ℃, and removing the solvent to obtain the covering agent layer.
The adhesive layer provided in this example is aqueous acrylic pressure-sensitive adhesive (PS-2020L, dow), the aqueous pressure-sensitive adhesive is uniformly coated on the covering agent layer by a stainless steel mesh roller, and the covering agent layer and the adhesive layer are sequentially laminated on the PET release film after drying at a high temperature in an oven at 90-110 ℃ and removing water.
Comparative example 1
The present example provides a tape core for correction tape comprising a frosted release layer having a thickness of 15 μm, a 20 μm masking agent layer and a 2 μm adhesive layer, which were disposed in this order.
The frosted stripping layer is a frosted PET (polyethylene terephthalate) release film (Nantongbao yan), the internal stripping force is 15-20g/25mm, and the external stripping force is 8-13g/25mm.
The cover layer comprises the following components in percentage by weight:
dispersing ethylene propylene rubber, isoprene rubber and styrene butadiene rubber in a solvent, heating to 90-100 ℃ to obtain a mixture A, adding a low-reflection pigment and an auxiliary agent into the mixture A, uniformly dispersing the auxiliary agent including a wetting agent, a lubricant and an antioxidant to obtain a mixture B, transferring the mixture B into grinding equipment to perform proper secondary grinding, wherein the particle size D50 of the white pigment is positioned in a range of 350-450nm to obtain a covering agent slurry, coating the covering agent slurry on a frosted PET release film by adopting roller coating equipment, performing high-temperature drying by using an oven at 90-110 ℃, and removing the solvent to obtain the covering agent layer.
The adhesive layer is aqueous acrylic pressure-sensitive adhesive (PS-2020L, dow), the aqueous pressure-sensitive adhesive is uniformly coated on the covering agent layer through a stainless steel mesh roller, and the covering agent layer and the adhesive layer are sequentially laminated on the PET release film after the moisture is removed through high-temperature drying in a 90-110 ℃ oven.
Comparative example 2
The present example provides a tape core for correction tape comprising a frosted release layer having a thickness of 15 μm, a 20 μm masking agent layer and a 2 μm adhesive layer, which were disposed in this order.
The frosted stripping layer is a frosted PET (polyethylene terephthalate) release film (Nantongbao yan), the internal stripping force is 15-20g/25mm, and the external stripping force is 8-13g/25mm.
The cover layer comprises the following components in percentage by weight:
dispersing ethylene propylene rubber, isoprene rubber and styrene butadiene rubber in a solvent, heating to 90-100 ℃ to obtain a mixture A, adding a light resistant agent, a low-reflection pigment and an auxiliary agent into the mixture A, uniformly dispersing the auxiliary agent including a wetting agent, a lubricant and an antioxidant to obtain a mixture B, transferring the mixture B into grinding equipment for proper secondary grinding, enabling the particle size D50 of the white pigment to be positioned in a range of 350-450nm to obtain a covering agent slurry, coating the covering agent slurry on a frosted PET release film by adopting roller coating equipment, drying at a high temperature by adopting an oven at 90-110 ℃, and removing the solvent to obtain a covering agent layer.
The adhesive layer is aqueous acrylic pressure-sensitive adhesive (PS-2020L, dow), the aqueous pressure-sensitive adhesive is uniformly coated on the covering agent layer through a stainless steel mesh roller, and the covering agent layer and the adhesive layer are sequentially laminated on the PET release film after the moisture is removed through high-temperature drying in a 90-110 ℃ oven.
Comparative example 3
The present example provides a tape core for correction tape comprising a frosted release layer having a thickness of 15 μm, a 20 μm masking agent layer and a 2 μm adhesive layer, which were disposed in this order.
The frosted stripping layer is a frosted PET (polyethylene terephthalate) release film (Nantongbao yan), the internal stripping force is 15-20g/25mm, and the external stripping force is 8-13g/25mm.
The cover layer comprises the following components in percentage by weight:
dispersing ethylene propylene rubber, isoprene rubber and styrene butadiene rubber in a solvent, heating to 90-100 ℃ to obtain a mixture A, adding a low-reflection pigment and an auxiliary agent into the mixture A, uniformly dispersing the auxiliary agent including a wetting agent, a lubricant and an antioxidant to obtain a mixture B, obtaining a covering agent slurry without secondary grinding of the mixture B, coating the covering agent slurry on a frosted PET release film by adopting roller coating equipment, drying at a high temperature by using an oven at 90-110 ℃, and removing the solvent to obtain a covering agent layer.
The adhesive layer is aqueous acrylic pressure-sensitive adhesive (PS-2020L, dow), the aqueous pressure-sensitive adhesive is uniformly coated on the covering agent layer through a stainless steel mesh roller, and the covering agent layer and the adhesive layer are sequentially laminated on the PET release film after the moisture is removed through high-temperature drying in a 90-110 ℃ oven.
Test case
1. Sample of
After preparation according to examples 1-3 and comparative examples 1-2, the tape cores were cut into strips 5-6mm wide and assembled into a correction tape housing (ACT 52310, morning light stationery) to make correction tape samples.
2. Test method
2.1 coating adhesion Properties
Coating layers with the length of 100mm and the interval of 5mm are respectively drawn on the left and right sides by using a coating property detector, 130g pressure is applied by using a black neutral pen with the length of 0.3mm and a neutral pen with the length of 0.5mm by using an adhesive force tester, a circle with the length of 50mm is drawn, and a circle is drawn at the speed of 1 circle/s and the translational speed of 2mm/s paper surface in a bidirectional way.
The coating is complete, and abnormal phenomena such as warping, cracking and peeling are avoided;
judging that the coating part is tilted, cracked and peeled off to be qualified;
the coating is incomplete, and abnormal phenomena such as warping, cracking, peeling and the like are judged to be poor.
2.2 coating hiding Properties
A4 paper is copied by using a black 0.3mm and 0.5mm neutral pen to write a permanent character on the A4 copy paper, applying pressure of less than or equal to 300g and immediately coating the paper in a single layer.
The facsimile of the copying machine does not leave marks, and the marks are completely unclear and visible and are judged to be excellent;
the facsimile of the copying machine leaves a slight trace, and the trace is slightly visible and judged to be qualified;
the facsimile trace of the duplicator is obvious; the handwriting is judged to be poor in full clarity.
2.3 coating re-writing Properties
A black 0.3mm and 0.5mm neutral pens are used for writing permanent characters on A4 copy paper, pressure less than or equal to 300g is applied, a correction tape is coated on handwriting in a single layer, then the black 0.3mm and 0.5mm neutral pens are used for writing permanent characters on the surface of the coating, and pressure less than or equal to 300g is applied.
When the ink is coated on handwriting and when the ink is rewritten, the coating is not broken, the handwriting is not diffused, and the phenomenon that the coating film is adhered to the pen point and plugs is judged to be excellent;
when the ink is coated on handwriting and when the ink is rewritten, the coating is not broken, the handwriting is not diffused, and the phenomenon that the coating film is slightly adhered to the pen point and the plug phenomenon is judged to be qualified;
when the ink is coated on handwriting or rewritten, the coating breaks, the handwriting spreads, and the phenomenon that the coating film is adhered to the pen point and plugs is judged to be bad.
2.4 gloss
The correction tape was continuously coated on A4 copy paper in a single layer so that the coating formed a rectangle of not less than 50 x 80mm (two adjacent coatings had an overlap width of not more than 1mm and no gap), and then tested for 60 ° gloss using a multi-angle gloss meter.
A 60 ° gloss of 75GU or more may be referred to as high gloss (also referred to as bright);
a 60 ° gloss of 50 to 75GU may be referred to as flat;
a 60 ° gloss of 10 to 50GU may be referred to as matte;
a 60 ° gloss of 10GU or less may be referred to as matt.
2.5 ageing resistance of the coating
Placing the correction tape in an ultraviolet box line lamp box with the wavelength of 254nm, continuously placing for 6 months, taking out, standing for 4 hours at the temperature of 23+/-2 ℃, and detecting the adhesion performance, the covering performance and the re-writing performance of the correction tape:
the adhesive property, the covering property and the rewriting property are satisfied;
the adhesive property, the covering property and the rewriting property are partially met and are judged to be qualified;
it was judged that the adhesion property, the hiding property and the rewritability were not satisfied at all.
The coating property detector used in the test is an HY-543A correction tape coating property detector manufactured by Rui technology Co., ltd; the adhesive force tester is HY-543B adhesive force tester manufactured by Rui technology Co., ltd; the multi-angle gloss meter is AN AN-2063 gloss meter manufactured by An nanometer electronic technology (Shanghai) limited company; the ultraviolet box line lamp box is HM-6650C ultraviolet box line lamp box produced by Mizhou HongMing instruments Co.
3. Test results
The test results are shown in Table 1, and the results show that: the soft light correction tape core provided by the invention has good adhesion performance, covering performance, writing performance and ageing resistance.
TABLE 1
The comparative example 1 has no ultraviolet absorber or light stabilizer and has poor aging resistance.
The pigment in comparative example 2 is rutile titanium dioxide without low reflection, the glossiness is higher, and the data is in a matte range.
The pigment of comparative example 3 was not subjected to secondary milling of the low reflective pigment, and the granularity was too large, affecting the hiding and re-writing properties of the coating.
The detailed process equipment and process flow of the present invention are described by the above embodiments, but the present invention is not limited to, i.e., it does not mean that the present invention must be practiced depending on the detailed process equipment and process flow. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of raw materials for the product of the present invention, addition of auxiliary components, selection of specific modes, etc., falls within the scope of the present invention and the scope of disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (10)
1. The soft light belt core for the correction belt comprises a belt core coating, wherein the belt core coating sequentially comprises a stripping layer, a covering agent layer and a binder layer, and is characterized in that the covering agent layer comprises low-reflection pigment, and the 60-degree glossiness of the covering agent layer is lower than 30GU.
2. The soft belt core for a correction belt according to claim 1, wherein the low-reflection pigment is a porous white pigment in which an inorganic matting pigment and a titanium dioxide pigment core are coated with an inorganic binder.
3. The soft belt core for a correction belt according to claim 2, wherein the inorganic matting pigment is calcium carbonate particles or silica particles, the inorganic matting pigment has an average particle size of 0.10 to 0.30 μm, and the titanium dioxide pigment core has an average particle size of 0.20 to 0.50 μm.
4. The soft belt core for correction belt according to claim 2, characterized in that the low-reflection pigment is subjected to secondary grinding, the low-reflection pigment D50 particle size being in the range of 300-500 nm; the mass ratio of the inorganic binder to the titanium dioxide pigment inner core is 30:70-15:85.
5. The correction tape soft core of claim 4, wherein said hiding layer has a 60 ° gloss of less than 10GU.
6. The soft belt core for a correction belt according to claim 1, wherein the components of the covering agent layer include, in parts by weight: 25-35 parts of pigment, 3-5.5 parts of rubber and 1-2 parts of light resistance agent, wherein the pigment comprises at least 20 parts of low-reflection pigment.
7. The soft belt core for a correction belt according to claim 6, wherein the light-resistant agent comprises an ultraviolet absorber and/or a light stabilizer, and the mass ratio of the ultraviolet absorber to the light stabilizer is 4:8 to 6:8.
8. A correction tape comprising the soft optical tape core for a correction tape according to any one of claims 1 to 7.
9. A method for preparing a soft light belt core for a correction belt, which is characterized by comprising the following steps:
step (1): preparing an initial low-reflection pigment;
step (2): dispersing and dissolving rubber in a solvent and heating to more than 80 ℃ to obtain a mixture A;
step (3): adding a light resistant agent, a low-reflection pigment and an auxiliary agent into the mixture A, and uniformly dispersing to obtain a mixture B;
step (4): carrying out secondary grinding on the mixture B to ensure that the particle size of the low-reflection pigment D50 is between 300 and 500nm, thereby obtaining covering agent slurry;
step (5): coating the masking agent slurry on a stripping layer, and drying at a high temperature of 80-120 ℃ to obtain a masking agent layer;
step (6): and uniformly coating the aqueous pressure-sensitive adhesive on the covering agent layer, and drying at a high temperature of 80-120 ℃ to obtain the soft light belt core for the correction belt.
10. The method of producing a soft belt core for a correction belt according to claim 9, wherein the step (1) is specifically:
step (1-1): dispersing titanium dioxide pigment and inorganic extinction pigment in water, and mixing into sodium silicate aqueous solution;
step (1-2): heating and stirring the solution prepared in the step (1-1), mixing sulfuric acid aqueous solution, adjusting pH to 7.0-7.5, and standing;
step (1-3): filtering the solution obtained in the step (1-1) and carrying out preliminary grinding on the filtered matter to obtain the initial low-reflection pigment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311530134.XA CN117567893A (en) | 2023-11-16 | 2023-11-16 | Soft light belt core for correction belt, preparation method of soft light belt core and correction belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311530134.XA CN117567893A (en) | 2023-11-16 | 2023-11-16 | Soft light belt core for correction belt, preparation method of soft light belt core and correction belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117567893A true CN117567893A (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311530134.XA Pending CN117567893A (en) | 2023-11-16 | 2023-11-16 | Soft light belt core for correction belt, preparation method of soft light belt core and correction belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117567893A (en) |
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2023
- 2023-11-16 CN CN202311530134.XA patent/CN117567893A/en active Pending
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