CN105951532A - Repeatedly usable writing paper and production method thereof - Google Patents
Repeatedly usable writing paper and production method thereof Download PDFInfo
- Publication number
- CN105951532A CN105951532A CN201610483848.3A CN201610483848A CN105951532A CN 105951532 A CN105951532 A CN 105951532A CN 201610483848 A CN201610483848 A CN 201610483848A CN 105951532 A CN105951532 A CN 105951532A
- Authority
- CN
- China
- Prior art keywords
- basic unit
- paint layer
- functional paint
- ink
- writing paper
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- D21H27/30—Multi-ply
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
-
- 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
-
- 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
- B32B37/1207—Heat-activated adhesive
-
- 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
- B32B37/1207—Heat-activated adhesive
- B32B2037/1215—Hot-melt adhesive
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
Abstract
The invention relates to repeatedly usable writing paper which comprises a base layer, a carrier membrane A, an ink base layer A and a functional coating layer A, wherein the carrier membrane A is paved on the base layer; the carrier membrane A is uniformly coated with the ink base layer A; the functional coating layer A is printed on the ink base layer A; the functional coating layer A has the properties of being transparent when being mixed with water and returning to an original color after the water is dried; the production method of the repeatedly usable writing paper comprises the following steps: cutting a PET membrane, coating with the ink base layer A and an ink base layer B, coating with the functional coating layer A and a functional coating layer B, and combining the PET membrane with the base layer. The repeatedly usable writing paper has the beneficial effects that the manufacturing cost is relatively low, the production method is relatively simple, the PET membrane is relatively good in wearing resistance and flexibility, writing can be relatively clear, the energy can be saved, and the environment can be protected.
Description
Technical field
The present invention relates to a kind of writing paper and production method thereof, particularly relate to a kind of repeatedly used writing paper and production method thereof.
Background technology
Writing paper is the writing carrier that people commonly use, and traditional writing paper is mostly to be fabricated by with paper pulp, not only wastes resource, and can produce a large amount of waste water in paper-making process and adversely affect environment；Common repeatedly used writing paper is typically at papery printed on paper white carbon black, then coating function coating, and this manufacture method is the highest to the requirement of paper, and complex process and manufacturing cost are high.
Summary of the invention
The technical problem to be solved is: provide a kind of repeatedly used writing paper, solves common repeatedly used writing paper complex process and the high problem of manufacturing cost.
The present invention solves that problem set forth above be the technical scheme is that
A kind of repeatedly used writing paper, including basic unit 1, carrier film A2, ink basic unit A3 and functional paint layer A4, carrier film A2 is laid in basic unit 1, even spread ink basic unit A3 in carrier film A2, on ink basic unit A3, print is coated with functional paint layer A4, and described functional paint layer A4 has bleach after chance water, after water is dry, recover the characteristic of original color.
Described basic unit 1 is any one in paper, plastic plate or plank, and production cost is lower.
Carrier film B5 is also laid on the downside of described basic unit 1, even spread ink basic unit B6 in carrier film B5, on ink basic unit B6, print is coated with functional paint layer B7, and described functional paint layer B7 has bleach after chance water, recovering the characteristic of original color after water is dry, two sides can be carried out writing, and saves production cost.
Described carrier film A2, carrier film B5 are any one in PET film or coated film.
Described black basic unit A3, ink basic unit B6 are any one of black, blueness or camouflage color color ink basic unit, have more preferable contrast, and handwriting is apparent.
Described functional paint layer A4, the composition of functional paint layer B7 are identical, and with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 0.5～1.8 μm, has more preferable glossiness.
The production method of a kind of repeatedly used writing paper, comprises the steps:
The cutting of a.PET film: by permanent hair styling machine, according to pre-set size, PET film being carried out cutting, permanent hair styling machine cutting temperature is 40～60 DEG C；
B. ink basic unit A, the coating of ink basic unit B: ink basic unit A, ink basic unit B are printed in above-mentioned steps a on the PET film of institute's cutting by letterpress or intaglio press, described ink basic unit A, ink basic unit B are the carbon black pellet of 270～320 mesh；
C. functional paint layer A, the coating of functional paint layer B: functional paint layer A, functional paint layer B being coated on uniformly on the PET film of above-mentioned steps b Zhong Yi printer's ink basic unit A, ink basic unit B by coating machine, described functional paint layer A, the pH value of functional paint layer B are 8.0～9.2；
D. PET film is combined with basic unit: be combined with each other with basic unit by the hydrosol or PUR by the opposite side having been coated with the PET film of functional paint layer A, functional paint layer B in above-mentioned steps c.
Described step b Zhong Mo basic unit A, the thickness of ink basic unit B are 0.5～2, and color developing effect is more preferable.
The beneficial effects of the present invention is: 1, manufacturing cost is lower, production method is simpler, and PET film has more preferable wearability and pliability, and handwriting is apparent, more energy-conserving and environment-protective.2, any one during basic unit is paper, plastic plate or plank, production cost is lower.3, carrier film B is also laid on the downside of basic unit, even spread ink basic unit B in carrier film B, on ink basic unit B, print is coated with functional paint layer B, and described functional paint layer B has bleach after chance water, recovering the characteristic of original color after water is dry, two sides can be carried out writing, and saves production cost.4, ink basic unit A3, ink basic unit B6 are any one of black, blueness or camouflage color color ink basic unit, have more preferable contrast, and handwriting is apparent.5, functional paint layer A4, functional paint layer B7 composition identical, with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 0.5～1.8 μm, has more preferable glossiness.6, step b Zhong Mo basic unit A, the thickness of ink basic unit B are 0.5～2, and color developing effect is more preferable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Wherein, 1-basic unit, 2-carrier film A, 3-ink basic unit A, 4-functional paint layer A, 5-carrier film B, 6-ink basic unit B, 7-functional paint layer B.
Detailed description of the invention
1 further illustrate embodiments of the invention below in conjunction with the accompanying drawings.
Embodiment one
The repeatedly used writing paper of one described in this detailed description of the invention, including basic unit 1, carrier film A2, ink basic unit A3 and functional paint layer A4, carrier film A2 is laid in basic unit 1, even spread ink basic unit A3 in carrier film A2, on ink basic unit A3, print is coated with functional paint layer A4, and described functional paint layer A4 has bleach after chance water, after water is dry, recover the characteristic of original color.
Described basic unit 1 is paper.
Also laying carrier film B5 on the downside of described basic unit 1, even spread ink basic unit B6 in carrier film B5, on ink basic unit B6, print is coated with functional paint layer B7, and described functional paint layer B7 has bleach after chance water, recovers the characteristic of original color after water is dry.
Described carrier film A2, carrier film B5 are PET film.
Described black basic unit A3, ink basic unit B6 are black ink basic unit.
Described functional paint layer A4, the composition of functional paint layer B7 are identical, and with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 0.6～0.8 μm.
The production method of a kind of repeatedly used writing paper, comprises the steps:
The cutting of a.PET film: by permanent hair styling machine, according to pre-set size, PET film being carried out cutting, permanent hair styling machine cutting temperature is 45～50 DEG C；
B. ink basic unit A, the coating of ink basic unit B: ink basic unit A, ink basic unit B are printed in above-mentioned steps a on the PET film of institute's cutting by letterpress or intaglio press, described ink basic unit A, ink basic unit B are the carbon black pellet of 280～290 mesh；
C. functional paint layer A, the coating of functional paint layer B: functional paint layer A, functional paint layer B being coated on uniformly on the PET film of above-mentioned steps b Zhong Yi printer's ink basic unit A, ink basic unit B by coating machine, described functional paint layer A, the pH value of functional paint layer B are 8.5～8.8；
D. PET film is combined with basic unit: be combined with each other with basic unit by the hydrosol or PUR by the opposite side having been coated with the PET film of functional paint layer A, functional paint layer B in above-mentioned steps c.
Described step b Zhong Mo basic unit A, the thickness of ink basic unit B are 0.7～1.
Embodiment two
A kind of repeatedly used writing paper, including basic unit 1, carrier film A2, ink basic unit A3 and functional paint layer A4, carrier film A2 is laid in basic unit 1, even spread ink basic unit A3 in carrier film A2, on ink basic unit A3, print is coated with functional paint layer A4, and described functional paint layer A4 has bleach after chance water, after water is dry, recover the characteristic of original color.
Described basic unit 1 is plastic plate.
Also laying carrier film B5 on the downside of described basic unit 1, even spread ink basic unit B6 in carrier film B5, on ink basic unit B6, print is coated with functional paint layer B7, and described functional paint layer B7 has bleach after chance water, recovers the characteristic of original color after water is dry.
Described carrier film A2, carrier film B5 are coated film.
Described black basic unit A3, ink basic unit B6 are blue ink basic unit.
Described functional paint layer A4, the composition of functional paint layer B7 are identical, and with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 0.9～1.2 μm.
The production method of a kind of repeatedly used writing paper, comprises the steps:
The cutting of a.PET film: by permanent hair styling machine, according to pre-set size, PET film being carried out cutting, permanent hair styling machine cutting temperature is 51～55 DEG C；
B. ink basic unit A, the coating of ink basic unit B: ink basic unit A, ink basic unit B are printed in above-mentioned steps a on the PET film of institute's cutting by letterpress or intaglio press, described ink basic unit A, ink basic unit B are the carbon black pellet of 300～310 mesh；
C. functional paint layer A, the coating of functional paint layer B: functional paint layer A, functional paint layer B being coated on uniformly on the PET film of above-mentioned steps b Zhong Yi printer's ink basic unit A, ink basic unit B by coating machine, described functional paint layer A, the pH value of functional paint layer B are 8.9～9.1；
D. PET film is combined with basic unit: be combined with each other with basic unit by the hydrosol or PUR by the opposite side having been coated with the PET film of functional paint layer A, functional paint layer B in above-mentioned steps c.
Described step b Zhong Mo basic unit A, the thickness of ink basic unit B are 1.1～1.5.
Embodiment three
A kind of repeatedly used writing paper, including basic unit 1, carrier film A2, ink basic unit A3 and functional paint layer A4, carrier film A2 is laid in basic unit 1, even spread ink basic unit A3 in carrier film A2, on ink basic unit A3, print is coated with functional paint layer A4, and described functional paint layer A4 has bleach after chance water, after water is dry, recover the characteristic of original color.
Described basic unit 1 is plank.
Also laying carrier film B5 on the downside of described basic unit 1, even spread ink basic unit B6 in carrier film B5, on ink basic unit B6, print is coated with functional paint layer B7, and described functional paint layer B7 has bleach after chance water, recovers the characteristic of original color after water is dry.
Described carrier film A2, carrier film B5 are coated film.
Described black basic unit A3, ink basic unit B6 are camouflage color color ink basic unit.
Described functional paint layer A4, the composition of functional paint layer B7 are identical, and with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 1.3～1.7 μm.
The production method of a kind of repeatedly used writing paper, comprises the steps:
The cutting of a.PET film: by permanent hair styling machine, according to pre-set size, PET film being carried out cutting, permanent hair styling machine cutting temperature is 56～58 DEG C；
B. ink basic unit A, the coating of ink basic unit B: ink basic unit A, ink basic unit B are printed in above-mentioned steps a on the PET film of institute's cutting by letterpress or intaglio press, described ink basic unit A, ink basic unit B are the carbon black pellet of 315～318 mesh；
C. functional paint layer A, the coating of functional paint layer B: functional paint layer A, functional paint layer B being coated on uniformly on the PET film of above-mentioned steps b Zhong Yi printer's ink basic unit A, ink basic unit B by coating machine, described functional paint layer A, the pH value of functional paint layer B are 8.9～9.1；
D. PET film is combined with basic unit: be combined with each other with basic unit by the hydrosol or PUR by the opposite side having been coated with the PET film of functional paint layer A, functional paint layer B in above-mentioned steps c.
Described step b Zhong Mo basic unit A, the thickness of ink basic unit B are 1.6～1.8.
Having the beneficial effects that of this detailed description of the invention: 1, manufacturing cost is lower, production method is simpler, and PET film has more preferable wearability and pliability, and handwriting is apparent, more energy-conserving and environment-protective.2, any one during basic unit is paper, plastic plate or plank, production cost is lower.3, carrier film B is also laid on the downside of basic unit, even spread ink basic unit B in carrier film B, on ink basic unit B, print is coated with functional paint layer B, and described functional paint layer B has bleach after chance water, recovering the characteristic of original color after water is dry, two sides can be carried out writing, and saves production cost.4, ink basic unit A3, ink basic unit B6 are any one of black, blueness or camouflage color color ink basic unit, have more preferable contrast, and handwriting is apparent.5, functional paint layer A4, functional paint layer B7 composition identical, with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 0.5～1.8 μm, has more preferable glossiness.6, step b Zhong Mo basic unit A, the thickness of ink basic unit B are 0.5～2, and color developing effect is more preferable.
The specific embodiment of the present invention is not construed as limiting the invention, the analog structure of every employing present invention and change, the most within the scope of the present invention.
Claims (8)
1. a repeatedly used writing paper, it is characterized in that: include basic unit (1), carrier film A(2), ink basic unit A(3) and functional paint layer A(4), basic unit (1) is upper lays carrier film A(2), carrier film A(2) upper even spread ink basic unit A(3), ink basic unit A(3) upper print painting functional paint layer A(4), and described functional paint layer A(4) there is bleach after chance water, recover the characteristic of original color after water is dry.
A kind of repeatedly used writing paper the most as claimed in claim 1, it is characterised in that: described basic unit (1) is any one in paper, plastic plate or plank.
A kind of repeatedly used writing paper the most as claimed in claim 1, it is characterized in that: carrier film B(5 is also laid in described basic unit (1) downside), carrier film B(5) upper even spread ink basic unit B(6), ink basic unit B(6) upper print painting functional paint layer B(7), and described functional paint layer B(7) there is bleach after chance water, recover the characteristic of original color after water is dry.
A kind of repeatedly used writing paper the most as claimed in claim 3, it is characterised in that: described carrier film A(2), carrier film B(5) be any one in PET film or coated film.
A kind of repeatedly used writing paper the most as claimed in claim 3, it is characterised in that: described black basic unit A(3), ink basic unit B(6) be any one of black, blueness or camouflage color color ink basic unit.
A kind of repeatedly used writing paper the most as claimed in claim 3, it is characterized in that: described functional paint layer A(4), functional paint layer B(7) composition identical, with china clay, calcium carbonate and silicon dioxide as pigment, Oxytarch, polyvinyl alcohol and synthetic latex are adhesive, and the particle diameter of china clay is 0.5～1.8 μm.
7. the production method of a repeatedly used writing paper, it is characterised in that comprise the steps:
The cutting of a.PET film: by permanent hair styling machine, according to pre-set size, PET film being carried out cutting, permanent hair styling machine cutting temperature is 40～60 DEG C；
B. ink basic unit A, the coating of ink basic unit B: ink basic unit A, ink basic unit B are printed in above-mentioned steps a on the PET film of institute's cutting by letterpress or intaglio press, described ink basic unit A, ink basic unit B are the carbon black pellet of 270～320 mesh；
C. functional paint layer A, the coating of functional paint layer B: functional paint layer A, functional paint layer B being coated on uniformly on the PET film of above-mentioned steps b Zhong Yi printer's ink basic unit A, ink basic unit B by coating machine, described functional paint layer A, the pH value of functional paint layer B are 8.0～9.2；
D. PET film is combined with basic unit: be combined with each other with basic unit by the hydrosol or PUR by the opposite side having been coated with the PET film of functional paint layer A, functional paint layer B in above-mentioned steps c.
The production method of a kind of repeatedly used writing paper the most as claimed in claim 7, it is characterised in that: described step b Zhong Mo basic unit A, the thickness of ink basic unit B are 0.5～2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483848.3A CN105951532A (en) | 2016-06-28 | 2016-06-28 | Repeatedly usable writing paper and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483848.3A CN105951532A (en) | 2016-06-28 | 2016-06-28 | Repeatedly usable writing paper and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105951532A true CN105951532A (en) | 2016-09-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610483848.3A Pending CN105951532A (en) | 2016-06-28 | 2016-06-28 | Repeatedly usable writing paper and production method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN105951532A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012745A (en) * | 2017-05-10 | 2017-08-04 | 许基华 | A kind of reusable novel book drawing paper and its manufacture method |
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|---|---|---|---|---|
| JPH10175392A (en) * | 1996-12-17 | 1998-06-30 | Kanji Inagaki | Sheet for writing with water for calligraphy |
| CN1514059A (en) * | 2003-05-16 | 2004-07-21 | 洁 徐 | Xuan paper imitation water writing paper and its making method |
| CN202139512U (en) * | 2011-05-05 | 2012-02-08 | 朱明德 | Handwriting practice paper capable of being used repeatedly |
| CN202826852U (en) * | 2012-09-06 | 2013-03-27 | 胡雪辉 | Water-resistant folding-resistant calligraphy and painting water writing composite paper |
| CN206143533U (en) * | 2016-06-28 | 2017-05-03 | 谭亮 | Writing paper that can use repeatedly |
-
2016
- 2016-06-28 CN CN201610483848.3A patent/CN105951532A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10175392A (en) * | 1996-12-17 | 1998-06-30 | Kanji Inagaki | Sheet for writing with water for calligraphy |
| CN1514059A (en) * | 2003-05-16 | 2004-07-21 | 洁 徐 | Xuan paper imitation water writing paper and its making method |
| CN202139512U (en) * | 2011-05-05 | 2012-02-08 | 朱明德 | Handwriting practice paper capable of being used repeatedly |
| CN202826852U (en) * | 2012-09-06 | 2013-03-27 | 胡雪辉 | Water-resistant folding-resistant calligraphy and painting water writing composite paper |
| CN206143533U (en) * | 2016-06-28 | 2017-05-03 | 谭亮 | Writing paper that can use repeatedly |
Non-Patent Citations (2)
| Title |
|---|
| 刘仁庆著: "《纸张小百科》", 31 July 2005, 化学工业出版社 * |
| 曹同玉等编: "《聚合物合成乳液合成原理性能及应用 第二版》", 28 April 2007, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012745A (en) * | 2017-05-10 | 2017-08-04 | 许基华 | A kind of reusable novel book drawing paper and its manufacture method |
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Application publication date: 20160921 |
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