Background technology
A kind of daily consumption article commonly used of cultural paper still, is in psychologically to the needs of brightness and to the demand of some physical indexs, adopts the paper pulp manufacturing based on bleached wood pulp usually.Some paper plant when the preparation offset printing paper, also adopts straw pulp to substitute wood pulp, so that reduce cost for saving timber resources both at home and abroad at present.But as cost with any sacrifice in performance.
China's culture paper market is pursued high whiteness always, continued trend of rising in these several years in addition, the slurry of China's cultural paper is owing to have a large amount of straw pulps, change machine slurry or deinking slurry, the fibrous raw material whiteness is relatively low, the fines content height, this causes the consumption of brightening agent to increase, and has increased the papermaking cost.And no matter be straw pulp or wood pulp, all adopt bleach chemical pulp as paper making raw material.Because adopt bleached pulp, bleaching process will cause tremendous influence to environment.In addition, bleaching process also will produce environmentally harmful chemical substance.Mainly adopt whiteness than higher paper printing for existing textbook, blank sheet of paper is opened visible reflection of light stronger, particularly the light wave reflectivity to different frequency is more even, because this strong reflection, font contrast height causes that visual fatigue is bigger, and yellow paper reflection spectrum is single, intraocular is looked road and visual center, and to bear little impression big, produces the visual effect height, is difficult for producing visual fatigue.CN99108565.5 discloses a kind of prevention because of reading and cause the books of myopia, and its light of the paper that existing books adopt reflects contrast height, and ruddiness or long wave spectral reflectivity height easily cause visual fatigue and kopiopia, and easily cause myopia.This invention adopts its spectral reflectivity peak value below 580 nanometers, and the books that the lower paper of the reflectivity of the light wave frequency range more than the wavelength of respective value is made, regulatory demand in the time of can reducing read-write, reduce the spread effect of long wave light, suitably reduce aberration and suitable contrast can be provided eye.
There is the color of some book suitable for outside reading paper also to adopt faint yellow on the market, industrial analysis from papermaking, be that straw pulp or wood pulp are gone later to be coloured to the color that is fit to suitable vision again through bleaching, this method both operation is loaded down with trivial details, paper cost height is that paper pulp causes the pollution main cause to environment at bleaching process simultaneously.Association with pulp bleaching mainly is divided into chlorine bleaches technology and chlorine-free bleaching technology at present, and for example the bleaching of wheat straw chemical pulp adopts hypochlorite singing stage bleaching or CEH to float for three sections at present.Bleached pulp brightness is low, intensity difference, bleaching blowdown flow rate are big, and contains multiple carcinogen such as chlorination phenols in chlorination section and hypochlorite section waste water, and these waste water can not reclaim and be used for washing and join cooking liquor, its waste water severe contamination ecological environment.The bleaching agent that chlorine-free bleaching uses is many, and in order to reach a lot of bleaching effects, Extended Delignification is wanted in boiling before floating, and is relatively stricter to the requirement of paper pulp before floating, and improper when procedure Selection, condition is controlled when bad, the quality of influence slurry.
The used paper of whiteness height of the text paper of prior art or outside reading, cause visual fatigue easily, especially for students in middle and primary schools, eyesight very easily is subjected to the influence of external environment, and no matter prepare the used slurry of these paper at present is that wood pulp or straw pulp all will be bleached it, strengthens its whiteness, perhaps is coloured to warm colour after the bleaching again, may also have harmful material in the paper that obtains, its cost is also than higher.
The utility model content
The purpose of this utility model provides a kind of health type writing notebook, and this writing notebook is little to the human visual stimulation, can prevent myopia, is again a kind of nontoxic pest or the few writing notebook of harmful toxic matter simultaneously.
The purpose of this utility model can be achieved through the following technical solutions: a kind of health type writing notebook, a kind of health type writing notebook, comprise two front covers and the page or leaf that writes, the page or leaf that writes is that 40-76%, preferred whiteness are the cancellated thin layer of 45-50% for straw pulp fiber or straw pulp fiber and the staggered whiteness that forms of being entangled with of industrial paper pulp fiber.
The described page or leaf that writes is to contain the straw pulp fiber and do not add the staggered laminate structure of being entangled with formation of colorant, pigment or dyestuff.
Described writing notebook comprises notebook, brochure, note pad, account book or exercise book for students.
The described page or leaf that writes is quantitative 40-102g/m
2, preferred 45-80g/m
2, more preferably 47-70g/m
2Thin layer.
The ratio of the length and width of writing notebook is 1.0-4:1, its preferred 1.2-3.6:1, and it is 1.8-3.0:1 more preferably.
The described page or leaf that writes is to be 10-17KmnO by containing hardness
4Value, average fiber length are that 0.1-2.5mm, tensile index are that 23-57Nm/g, tear index are 3.0-6.0mNm
2/ g and folding index are 2-6kPam
2The slurry of the straw pulp of/g is copied the thin layer of making.
The area on the surface of the described page or leaf that writes is 0.3-1.5mm
2Dirt count less than 80 m
-2Preferred area is 0.3-1.5mm
2Dirt count is less than 60 m
-2Described write the page or leaf for opacity greater than 80%, be preferably greater than 88%, thin layer more preferably greater than 90%.
Can little prominent point be set at least one edge of four corners of the page frame table that writes.
Page frame table is provided with embossing apart from edge 0.5-1.5cm place writing.
The described page or leaf that writes is loose-leaf.
Described limit, left side of writing page or leaf is provided with at least two poroid cut channels, and perhaps described upper end of writing page or leaf is provided with at least two poroid cut channels.
Describe the utility model content below in detail.
The page or leaf that writes described in the utility model is to be formed by the mixed slurry that the contains straw pulp system of copying, and described straw pulp comprises a kind of or any combination more than two kinds in wheat straw waste, straw, stalk, reed, giantreed or the cotton stalk.
The part by weight of straw pulp is 10-100% in the described mixed slurry, is preferably 30-90%, more preferably 40-80%.
Described mixed slurry also contains industrial paper pulp, and described industrial paper pulp comprises one or more any combination of bagasse pulp, wood pulp, cotton pulp, bamboo pulp or secondary stock.
Described straw pulp is to comprise the slurry that obtains behind boiling, washing step, perhaps the slurry that obtains through boiling, washing, oxygen delignification step.
Described boiling is the disclosed boiling method commonly used of prior art, and it comprises Ammonium Sulfite Method, soda processes, caustic soda-anthraquinone, sulfate process or alkaline sodium sulfite-anthraquinone.
It is preferably as follows method:
The grass raw material is added in the pot, add cooking liquor again, cooking liquor is warming up to 100-200 ℃, boost to 0.3-0.9MPa, digestion time is 150-250 minute, in the described steaming preparation, wherein the ammonium sulfite consumption is the 5-20% to the over dry material quantity, join the 0-15% that amount of sodium hydroxide is the over dry material quantity, liquor ratio is 1:2-15, and the slurry that obtains obtains straw pulp after shove, washing.
More preferably:
The grass raw material is added in the pot, add cooking liquor again, cooking liquor is warming up to 156-173 ℃, boost to 0.6-0.75MPa, digestion time is 180-220 minute, in the described steaming preparation, wherein the ammonium sulfite consumption is the 9-15% to the over dry material quantity, join the 0-8% that amount of sodium hydroxide is the over dry material quantity, liquor ratio is 1:6-10, and the slurry that obtains obtains straw pulp after shove, washing.
The slurry that obtains behind the above-mentioned pulp washing can also be as required further oxygen delignification, obtain the straw pulp that needs.
Described oxygen delignification comprises: the slurry of gained after the boiling or the slurry after the washing are sent in the oxygen delignification reaction tower, and described slurry is 90-100 ℃ in the temperature of reaction tower import department, and pressure is 0.9-1.2MPa; The temperature in exit is 95-105 ℃, and pressure is 0.2-0.6MPa; For in the 2-4% of NaOH to the oven dry stock amount, the addition of oxygen is to carry out 60-90 minute under the condition of slurry 20-40kg per ton to described oxygen delignification, obtains straw pulp at alkali charge.
The hardness of described straw pulp is 10-17KmnO
4Value, average fiber length is 0.1-2.5mm, and tensile index is 23-57Nm/g, and tear index is 3.0-6.0mNm
2/ g, folding index are 2-6kPam
2/ g.
The whiteness of described straw pulp is 28-50%, is preferably 30-45%, more preferably 25-43%.
Described write the page or leaf for opacity greater than 80%, be preferably greater than 88%, thin layer more preferably greater than 90%.
The cancellated fabric that is woven into of above-mentioned straw pulp fiber and wood pulp cellulose, its this cancellated paper porous, coarse, the non-binding area of optics is big, write the page or leaf the opacity height, can shadow-mark when writing, after page has simultaneously been write, do not influence the normal use of another side.
Whiteness of writing page or leaf of the present utility model is 40-76%, and the whiteness of resulting paper is low, is yellow, experiment showed, that people's optic nerve cell is the most responsive to yellow, and under certain condition, yellow can effectively be slowed down visual fatigue, prevents hypometropia.Cultural paper in prior art, use whiteness than higher paper traditionally, physiological conditions analysis from the human visual light reflex, iris, pupil are to clearly as playing an important role, the contraction of iris can cover spherical aberration and aberration maximum lenticularly advances the picture part, contraction can increase the degree of depth of focus, make too closely or the area of the diffusion ring of light that focusing too far away produces dwindles, when myopia, adjusting and convergence power function combine, and pupil contraction occurs, and the illumination of this moment must suit, the light intensity increase makes pupil contraction, otherwise then enlarges.Long for the contrast that obtains maximum brightness under the high light stimulation, automatic the strongest visual fatigue and injury, the acceleration fatigue of eye of causing of while.
Described straw pulp comprises a kind of or any combination more than two kinds in wheat straw waste, rice straw, reed, giantreed or the cotton stalk.
All adopt bleaching straw pulp and/or bleached wood pulp to produce textbook book paper or outside reading book paper in the prior art, used straw pulp all will pass through bleaching process, when bleaching with chlorine bleaches, the chlorine element mainly is converted into AOX, main component is a chloroform, chloro phenol compound, many chloros dioxin and furans, these materials all have toxicity, especially many chloros dioxin and furans have carcinogenic strongly, cause a disease and become, teratogenesis shape and multiple cranial nerve pathology, and in bleached pulp, also has residual dioxin, so the paper that the slurry of crossing with chlorine bleach makes is extremely unfavorable to human body, simultaneously environment is polluted.Straw pulp of the present utility model is without above-mentioned bleaching process; do not contain harmful toxicant; fiber, half fiber can not be damaged; the performance of fiber is not affected; so writing notebook of the present utility model do not contain or contain a spot of harmful material; especially for the students in middle and primary schools that growing, it is few and eyesight is had a writing notebook of the health type of protective effect more to need to contain harmful substance.
The area on the surface of the described page or leaf that writes is 0.3-1.5mm
2Dirt count less than 80 m
-2Preferred area is 0.3-1.5mm
2Dirt count is less than 60 m
-2
Described dirt count is the dirt count described in the assay method of standard GB/T 1541-1989 paper and cardboard dirt count.
At least one edge in four corners of the page frame table that writes is provided with little prominent point, can constitute gore, square or rectangle face at the little prominent point of edge, also can be arranged to other figures.The setting of these little prominent points is compared with shiny surface, the people's page turning of being more convenient for.When being provided with at little prominent, preferably be arranged on the place, the lower right corner of the page frame table that writes.
Apart from edge 0.5-1.5cm place embossing is set at the page frame table that writes, described embossing can be various be consumer identification write page information, for example information such as the title of manufacturer or trade mark.This set not only can make things convenient for the consumer to obtain the information of product, owing to these embossings, has increased the intensity at page edge, more difficult the tearing in edge of the page or leaf that writes.
For convenience, the page or leaf that writes of the present utility model also can be made the form of loose-leaf, is provided with at least two poroid cut channels or is provided with at least two poroid cut channels in the top on the write limit, left side of page or leaf of loose-leaf.
Make the form of loose-leaf, can be convenient for carrying, putting in order its content when preserving together, because of be provided with at least two poroid cut channels at side, can directly be fixed on the loose-leaf binder, poroid cut channel can be circular or oval.
Advantage of the present utility model is, the opacity height of the page or leaf that writes can shadow-mark when writing, and after page has simultaneously been write, does not influence the normal use of another side; The whiteness of the writing notebook of health type is low, vision protection, prevents myopia, nonhazardous material or a spot of harmful toxic matter; Because straw pulp is than the cheap of other slurries and saved bleaching process, its cost reduces greatly; Can be loose-leaf, be convenient for carrying use, and loose-leaf when needed also can be fixing easily with loose-leaf binder.
The specific embodiment
Below in conjunction with figure specific description content of the present utility model, but be not limited to the following specific embodiment.
Embodiment 1
Straw raw material is added in the pot, add cooking liquor again, cooking liquor is warming up to 165 ℃, boosts to 0.70MPa, and digestion time is 240 minutes, in the described steaming preparation, wherein the ammonium sulfite consumption is to 15% of over dry material quantity, and joining amount of sodium hydroxide is 5% of over dry material quantity, and liquor ratio is 1: 8, the slurry that obtains obtains straw pulp after shove, washing, the hardness of straw pulp is 16KMnO
4Value, tensile index is 28Nm/g, tear index is 3.9mNm
2/ g, folding index are 3.4kPam
2/ g, the whiteness of straw pulp is 35%.Gained straw pulp and technology such as manufacture paper with pulp after wood pulp the mixes page or leaf that obtains writing, after testing, area is 0.3-1.5mm on the page frame table that writes
275 m of dirt count
-2, opacity is 91%, whiteness is 51%.
Embodiment 2
Be the write page structure signal of writing notebook loose-leaf as Fig. 1, a kind of health type writing notebook, comprise two front covers 1,2 and write page or leaf 3, write page or leaf 3 whiteness at 40-76%, be yellow, people's optic nerve cell is the most responsive to yellow, under certain condition, yellow can effectively be slowed down visual fatigue, prevents hypometropia, nonhazardous material or contain a spot of harmful toxic matter.In actual use, the content that the page or leaf that writes writes down need be organized in together, so the page or leaf 3 that writes of writing notebook of the present utility model also can be a loose-leaf, limit, page or leaf left side is provided with at least two poroid cut channels writing, as Fig. 2 is three poroid cut channels 41,42,43, the page or leaf that writes is needed because of three circular hole cut channels that set are arranged, can directly to be fixed on the loose-leaf binder when stapled together.Also can loose-leaf write the page or leaf the upper end be provided with at least two poroid cut channels, be two poroid cut channels 51,52 as Fig. 3.Both carry the aspect like this, also it can be organized in together at any time simultaneously, or can be dissimilar and very easily with its classification according to it.
Embodiment 3
For the ease of page turning, at least one edge in four corners of the page frame table that writes is provided with little prominent point, can constitute gore, square or rectangle face at the little prominent point of edge, also can be arranged to other figures.The setting of these little prominent points is compared with shiny surface, the people's page turning of being more convenient for.As Fig. 4, be provided with little prominent point 6 in the lower right corner of the page or leaf that writes, Fig. 5 is the diagram that the amplification of little prominent part is set, and all little prominent point and margin edge surround triangle, and little prominent point and margin edge also can surround square or other figures.
Embodiment 4
In general, the frequency that the edge of writing notebook is touched is very high, is easy to not tear or make dirty, so carry out the generation that certain modification can be avoided above-mentioned phenomenon at its edge.As shown in Figure 6, far from edge 0.5-1.5cm place embossing 7 is set,, has increased the intensity at page edge owing to these embossings on the right side on page or leaf 3 surfaces of writing, more difficult the tearing in edge of the page or leaf that writes, the attractive in appearance of the page also seems simultaneously.Described embossing also can be various for the consumer discerns write page Word message or pattern-information, and for example information such as the title of manufacturer or trade mark except above-mentioned advantage, have also made things convenient for the consumer to obtain the information of product.