CN103469694A - Paper, paper-making equipment and paper-making method thereof - Google Patents
Paper, paper-making equipment and paper-making method thereof Download PDFInfo
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- CN103469694A CN103469694A CN2013103917361A CN201310391736A CN103469694A CN 103469694 A CN103469694 A CN 103469694A CN 2013103917361 A CN2013103917361 A CN 2013103917361A CN 201310391736 A CN201310391736 A CN 201310391736A CN 103469694 A CN103469694 A CN 103469694A
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Abstract
The invention discloses a piece of paper. The paper comprises a basic layer and a pattern layer, wherein the pattern layer is combined with the basic layer; the pattern layer occupies the local area of the basic layer; the basic layer is formed by a first kind of slurry; the pattern layer is formed by a second kind of slurry; the whiteness stability of the first kind of slurry is different from that of the second kind of slurry so that the basic layer and the pattern layer have color difference and patterns of the pattern layer can be represented on the basic layer. According to the paper, the characteristic that the slurry with poor whiteness stability has large possibility of yellowing is utilized, the pattern layer formed by the slurry with the poor whiteness stability is molded on the basic layer formed by the slurry with the high whiteness stability, so that the pattern layer has the whiteness different from that of the basic layer to represent the pattern shape, thus achieving attractive effect; moreover, the slurry with the poor whiteness stability such as high-yield slurry can be fully utilized, and the treatment process of inhibiting yellowing does not need to be specially adopted; meanwhile, consumers have consumption desire because the cognition that the paper becomes old is not produced. The invention also provides paper-making equipment and a paper-making method.
Description
Technical field
The present invention relates to a kind of paper, particularly a kind of paper of the poor slurry manufacture of retention of whiteness and paper making equipment and papermaking process of this kind of paper of manufacturing paper with pulp of taking full advantage of.
Background technology
High yield pulp generally refers to and can utilize largely wood raw material, and yield can be up to the slurry more than 90%.Owing to taking full advantage of raw material, the application of high yield pulp in paper is manufactured is more and more general.But the inherent shortcoming that high yield pulp has, the quick brightness reversion of the paper of manufacturing paper with pulp that a large amount of lignin that high yield pulp contains cause.Due to the brightness reversion of paper, cause Paper White Degree to reduce, make people produce the sensation of paper " old " and lose the wish of consumption.
The current general problem that adopts two kinds of methods to deal with the Paper White Degree poor stability (brightness reversion) that high yield pulp manufactures paper with pulp of industry.The first is added the brightness reversion inhibitor in slurry, and it two is to use filler or other materials to be covered at paper surface.But the brightness reversion inhibitor used at present can only partly delay the generation of paper from yellowing, also can not thoroughly solve the problem of paper from yellowing, but also improve the production cost of paper.And the method that adopts materials such as using filler to be covered can only be applied on specific paper kind, the scope of application is limited.
Summary of the invention
In view of this, the present invention aims to provide the paper that a kind of poor slurry that takes full advantage of retention of whiteness is made, and relevant paper making equipment and papermaking process, the characteristic of this kind of paper can the take full advantage of retention of whiteness easy brightness reversion of paper that poor slurry makes, and make the consumer there is the wish of consumption.
A kind of paper, comprise basic unit and the patterned layer of being combined with basic unit, described patterned layer occupies the local area of basic unit, described basic unit is formed by the first slurry, described patterned layer is formed by the second slurry, the retention of whiteness of the retention of whiteness of the first slurry and the second slurry has difference, thereby makes between described basic unit and patterned layer produce aberration and the pattern of patterned layer is presented in basic unit.
A kind of paper making equipment for the manufacture of above-mentioned paper, comprise forming part, wet transfer portion and drying section, described forming part comprises basic unit's forming section and patterned layer laying section, described basic unit forming section comprises flow box and corresponding fabric, described flow box for being configured as basic unit by the first slurry on fabric, described patterned layer laying section comprises that at least one cloth spills head, at least one described cloth spills head for the second slurry being formed in basic unit to the patterned layer of the local area that occupies basic unit, the retention of whiteness of the retention of whiteness of described the first slurry and the second slurry has difference, described wet transfer portion is for being transferred to drying section by the above-mentioned basic unit's paper web that is formed with patterned layer, described drying section is for carrying out drying to this paper web.
A kind of papermaking process that utilizes above-mentioned paper making equipment to carry out papermaking, step comprises:
Utilize the first slurry moulding basic unit that manufactures paper with pulp in basic unit's forming part;
In patterned layer laying section, utilize the second slurry to form patterned layer at basic unit's local location, and the extremely wet transfer portion of basic unit's web transfers that this is formed with to patterned layer, the retention of whiteness of the retention of whiteness of described the first slurry and the second slurry has difference; And
This paper web is transferred to drying section and paper web is carried out to drying from wet transfer portion.
The present invention utilizes the discrepant two kinds of slurries of retention of whiteness tool to form respectively basic unit and patterned layer, make to occupy the patterned layer of basic unit's local area because the difference of retention of whiteness is apparent in corresponding pattern in basic unit, to play effect attractive in appearance, thereby can take full advantage of the poor slurry of retention of whiteness, and make the consumer can not produce the understanding that paper wears.Moreover, the present invention utilizes the whiteness difference phenomenon presented after the poor slurry brightness reversion of retention of whiteness, therefore in paper-making process, be used for suppressing the specific aim treatment process of this kind of slurry brightness reversion without employing, but technique, the cost requirement of the papermaking of relative reduce tradition.
With reference to the accompanying drawings, the invention will be further described in conjunction with specific embodiments.
The accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of the paper of one embodiment of the invention.
Fig. 2 is the plane exploded view of the paper in Fig. 1.
Fig. 3 is the structural representation of the paper making equipment of one embodiment of the invention.
Fig. 4 utilizes paper making equipment of the present invention to manufacture a view of paper.
Fig. 5 and Fig. 6 are the structural representations of the paper making equipment of other embodiments of the invention.
The main element symbol description
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10 |
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11 |
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20、21、22 |
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201、211、221 |
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202、212、214、222、224 |
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203、213、223 |
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215、225 |
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30 |
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40 |
The following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
The specific embodiment
As depicted in figs. 1 and 2, a kind of paper that one embodiment of the invention provides, comprise basic unit 10 and with the patterned layer 11 of basic unit's 10 combinations.
Described basic unit 10 is formed by the first slurry, and described patterned layer 11 is formed by the second slurry.The retention of whiteness of the first slurry is better than the retention of whiteness of the second slurry.For example, in one embodiment, the first slurry can be chemical pulp, and the second slurry can be high yield pulp.
Chemical pulp refers to and in the process of being made slurry by paper making raw material such as timber etc., adopts chemical method to remove most of non-cellulose composition and the paper pulp that makes from plant fiber material.Because the non-cellulose composition in plant is removed significantly, by plant to the slurry process in the plant material loss more, be also that so-called yield is lower.For example, adopt the chemical pulp of some technique gained, its manufacture process can only be slurry by the wood conversion of 45-50%.Made its retention of whiteness of paper of chemical pulp is better, can be because illumination etc. is former thereby produce the larger problem of chromatic aberration.
Relative, high yield pulp mainly carrys out defibre from paper making raw material timber by the method for physics, therefore can farthest utilize paper making raw material.The production process of high yield pulp can be slurry by the feedstock conversion more than 65%, even can reach more than 90%.High yield pulp is because preserving preferably the lignin in raw material, and lignin easy brightness reversion under the environment such as illumination, therefore by high yield pulp, manufactures paper with pulp the paper that forms compared to the paper of by chemical pulp, being manufactured paper with pulp and being formed, and its retention of whiteness is poor.
In the present invention, utilize the retention of whiteness of described patterned layer 11 poorer than the retention of whiteness of basic unit 10, thereby make between described basic unit 10 and patterned layer 11 produce aberration and the pattern of patterned layer 11 is presented in basic unit 10.
Described basic unit 10 and patterned layer 11 are tangled fixed and are combined by the sizing material forming process, institute is fibrous separately.This process system is because of the drainage of fiber in forming process, again arranged, therefore basic unit 10 and patterned layer 11 essence can be regarded an indivisible integral body as, and the paper product with multi-layer web formed from means such as adopting again gluing, mechanical pressing after Web forming is different.Understandably, according to the actual needs, also can be again by means such as gluing, mechanical pressings, by a plurality of, there is the basic unit 10 that combines of the present invention and combine with the single-part stationery of patterned layer 11.
In order not affect the combination of patterned layer 11 and basic unit 10 in forming process, and do not affect the production processes such as follow-up wet transfer, drying after combination, the thickness of patterned layer 11 is preferably controlled as 1/20 ~ 1/2 of basic unit's 10 thickness.
It is upper that patterned layer 11 only covers basic unit partly 10 surfaces, but not cover basic unit 10 fully.Described patterned layer 11 occupies the local area in basic unit 10 horizontal (cross direction, CD).That is to say, the area that patterned layer 11 occupies is less than the area that basic unit 10 occupies.In embodiment as shown in Figure 2, described patterned layer 11 forms the pattern of linear, basic unit 10 vertically on, be also paper machine direction (machine direction, MD) there is continuity on, yet this patterned layer 11 is in the transversely space of basic unit 10, and also this patterned layer 11 only occupies the local area of basic unit 10 in same lateral position.
In some other embodiment, for considering of the factor such as attractive in appearance, this patterned layer 11 also can form the pattern of other shapes.Therefore what patterned layer 11 can be in basic unit 10 transversely or vertically forms continuous pattern, but no matter how the pattern of patterned layer 11 changes, patterned layer 11 finally occupies the local area of basic unit 10, thereby the pattern that makes patterned layer 11 have can be presented because of the difference of retention of whiteness in basic unit 10.
Further, described patterned layer 11 can comprise the first patterned layer and the second patterned layer, and described the first patterned layer and the second patterned layer are used different slurries to form, thereby produce aberration between the first patterned layer and the second patterned layer.The first patterned layer can, with the second patterned layer parallel distributed in basic unit 10, have the patterned layer 11 of various aberration with formation.For example, in the structure shown in Fig. 2, the pattern of part striated can be the first patterned layer, and the pattern of part striated can be the second patterned layer in addition.In addition, also can be after the first patterned layer be formed in basic unit 10, then form the second patterned layer on the first patterned layer, there is the patterned layer 11 of hierarchical structure with formation.
The present invention takes full advantage of the difference of the retention of whiteness of high yield pulp and chemical pulp, and by minute cloth specimen state of the default formed patterned layer 11 of high yield pulp, make high yield pulp show the pattern corresponding to patterned layer 11 because of easy brightness reversion in basic unit 10, the high inferior position that must starch can be changed into to advantage, thereby avoid the brightness reversion of paper integral body, improve the aesthetic of paper, thereby offset the negative impression of consumer to this kind of paper.
Based on aim of the present invention, form described basic unit 10 and be not limited to specific certain high yield pulp or chemical pulp with the slurry of patterned layer 11, as long as patterned layer 11 causes the generation of aberration and can in basic unit 10, show corresponding pattern because its retention of whiteness is poor.The present invention utilizes the easy brightness reversion characteristic of high yield pulp in essence, therefore the retention of whiteness of patterned layer 11 is poor is mainly the high yield pulp that has adopted ratio more, and the retention of whiteness of basic unit 10 is relatively better mainly that relative patterned layer 11 has adopted the relatively less high yield pulp of ratio.In one embodiment of the invention, described basic unit 10 is formed by chemical pulp thus, and described patterned layer 11 is formed by high yield pulp, but is not subject to the restriction of this embodiment.
For example, in certain embodiments, described basic unit 10 is formed by chemical pulp, and described patterned layer 11 is formed by the mixed slurry of chemical pulp and high yield pulp.Preferably, when patterned layer 11 is chemical pulp with the mixing slurry and form of high yield pulp, wherein high yield pulp accounts for and mixes the slurry mass ratio and be more than or equal to 20%, more preferably more than 50%.
Again for example, in certain embodiments, described basic unit 10 is formed by the mixed slurry of chemical pulp and high yield pulp, and described patterned layer 11 is formed by high yield pulp.Preferably, when basic unit 10 is chemical pulp with the mixing slurry and form of high yield pulp, high yield pulp accounts for the mass ratio that mixes slurry and is less than or equal to 50%, is more preferably 10%-30%.
Again for example, in certain embodiments, described basic unit 10 is formed by the mixed slurry of chemical pulp and high yield pulp, and described patterned layer 11 is also formed by the mixed slurry of chemical pulp and high yield pulp, but the high yield pulp usage ratio of patterned layer 11 is more.Under more these prerequisites of high yield pulp usage ratio in patterned layer 11, in preferred basic unit 10, high yield pulp accounts for the mass ratio that mixes slurry and is less than or equal to 50%, and in patterned layer 11, high yield pulp accounts for the mass ratio that mixes slurry and is more than or equal to 30%.Preferred, present more obvious aberration for making basic unit 10 and patterned layer 11, in patterned layer 11, the accounting of high yield pulp should be at least high more than 20% than the accounting of high yield pulp in basic unit 10.For example, in certain embodiments, in basic unit 10, to account for the mass ratio that mixes slurry be 10%-30% to high yield pulp, and in patterned layer 11, high yield pulp accounts for the mass ratio that mixes slurry and is more than or equal to 50%.
Understandably, the present invention takes full advantage of the relatively poor characteristic of retention of whiteness of high yield pulp, make final paper have and contain the patterned layer 11 that more high yield pulp is made, relatively show lucidly the pattern corresponding with patterned layer 11 distributions in the basic unit 10 of paper because whiteness is poor, therefore paper of the present invention is used for suppressing the treatment measures of high yield pulp brightness reversion in manufacture process without employing.
In addition, above-mentioned all embodiment form described basic unit 10 by having the better the first slurry of retention of whiteness, will have the poor the second slurry of retention of whiteness and form described patterned layer 11.Be appreciated that and as long as basic unit 10 has the difference of retention of whiteness with patterned layer 11, just can make to present aberration between basic unit 10 and patterned layer 11 on the paper formed, and make patterned layer 11 show the pattern corresponding with patterned layer 11 distributions in the basic unit 10 of paper.That is to say, the first slurry used in the various embodiments described above can be used for forming patterned layer 11, and the second slurry used in the various embodiments described above can be used for forming basic unit 10.
The present invention also further is provided for manufacturing the paper making equipment of above-mentioned paper.
As shown in Figure 3, the paper making equipment that one embodiment of the invention provides comprises forming part 20, wet transfer portion 30 and drying section 40.Forming part 20 is for being paper web by the paper making raw material sizing material forming, and wet transfer portion 30 is transferred to 40 pairs of paper webs of drying section for the paper web by forming part 20 gained moulding and carries out drying.
Described forming part 20 comprises basic unit's forming section and patterned layer laying section.Described basic unit forming section is for being configured as basic unit by the first slurry.Described patterned layer laying section is laid to patterned layer for the localized positions of the basic unit in moulding by the second slurry.The retention of whiteness of the first slurry is better than the retention of whiteness of the second slurry.Understandably, can be also that the retention of whiteness of the first slurry is poorer than the retention of whiteness of the second slurry.Hereinafter in the explanation to this paper making equipment, the first slurry be the fibrous suspension that contains chemical pulp be example, the second slurry be the fibrous suspension that contains high yield pulp be example, understandably, the first slurry and the second slurry should not be subject to the restriction of this concrete embodiment, and the various slurries that are used to form basic unit 10 and patterned layer 11 of mentioning hereinbefore are all feasible.
In embodiment shown in Fig. 3, basic unit's forming section comprises flow box 201 and corresponding fabric 202.Flow box 201 receives the fibrous suspension that contains chemical pulp after the operations such as loose slurry, with slurry are processed, and the fibrous suspension that contains chemical pulp to injection on mobile fabric 202, and fibrous suspension drainage on fabric 202 is configured as the basic unit 10 of hygrometric state.Flow box 201 is whole laterally extending along fabric 202, for the whole slurry that transversely sprays at fabric 202, thereby forms with fabric 202 basic with wide basic unit 10.
Described patterned layer laying section comprises that at least one cloth spills 203, and described cloth spills 203 and within 201 minutes, is arranged with flow box, and is arranged on the downstream of flow box 201.Described cloth spills 203 fibrous suspension that contain high yield pulp that receive after the operations such as loose slurry, with slurry are processed, and spray the fibrous suspension that contains high yield pulp on the basic unit that is hygrometric state 10 breadths on fabric 202, fibrous suspension is drainage on basic unit's 10 breadths, be configured as patterned layer 11, thereby patterned layer 11 is laid in basic unit 10.Patterned layer 11 and basic unit 10 constantly dewater to the process of wet transfer portion 30 in forming part 20, make two fibers in the paper web layer mutually tangle in conjunction with and finally form an indivisible individual layer paper web.The process of this combination is also carried out certainly in the transmittance process of wet transfer portion 30, it is generally acknowledged, before arriving drying section 40, this patterned layer 11 has preferably and is combined with basic unit 10, and can regard the paper web of an integral body as.
When cloth spills 203 when a plurality of, cloth can be spilt to the 203 same lateral position that optionally are disposed on fabric 202, for in the partial lateral of fabric 202, be also to spray slurry on the partial lateral of basic unit 10, thereby form patterned layer 11 in basic unit 10.Understandably, also a plurality of cloth can be spilt to the 203 non-same lateral position that are arranged on fabric 202, be used to form the patterned layer 11 with hierarchical structure.
Understandable, though cloth spills 203 and is arranged on the partial lateral of fabric 202, but described cloth spills a whole width of basic unit's paper web that 203 scopes that distribute can be prolonged and flow box 201 forms, also substantially prolong and the width of whole fabric 202, distribute and spill 203 with selection portion flexibly, spill with any local location cloth transversely in basic unit 10 fibrous suspension that contains high yield pulp, and form patterned layer 11 in basic unit 10.As shown in Figure 4, described patterned layer laying section has along the horizontal direction of the basic unit 10 of paper web spaced one and arranges and spill 203, for convenience of describing, it is a that these cloth are spilt to 203 number consecutively, b, c, d, e, f, g, h, i ..., at least one cloth in above-mentioned spills 203 and spills to basic unit's 10 cloth the fibrous suspension that contains high yield pulp continuously, can form the linearity pattern parallel with basic unit 10 directions of motion.Number b, g cloth shown in Fig. 4 and spill 203 and open, thereby form the patterned layer 11 that is rendered as two linearities in basic unit 10.
The above-mentioned explanation in conjunction with Fig. 4 only illustrates wherein a kind of concrete sample state of formed patterned layer 11 in the present invention, understandably, as required, described one or more cloth spill 203 can be transversely the moving of fabric 202, better to form various patterned layer 11.By movement, cloth is set and spills 203, make cloth spill 203 contain high yield pulp in injection fibrous suspension the time, make the transverse shifting of friction speed or track, vertically moving of bonded fabric 202 can form corresponding pattern on fabric 202 simultaneously.According to the sample state of the patterned layer 11 of required formation, can select to arrange cloth and spill quantity, position and/or a mobile mode of 203.
In certain embodiments, described patterned layer laying section also can have with cloth and spills 203 a corresponding fabric.For example, shown in Fig. 5, the forming part 21 in an embodiment, its basic unit's forming section comprises flow box 211 and corresponding fabric 212, its patterned layer laying section comprises that cloth spills 213 and corresponding fabric 214.Fabric 212 contacts at roll body 215 places with fabric 214.The fibrous suspension that flow box 211 sprays is shaped to the basic unit 10 of hygrometric state at roll body 215 places, and is passed on fabric 214, and cloth spills 213 corresponding fibrous suspension is injected in the basic unit 10 on fabric 214 and forms patterned layer 11 subsequently.
In certain embodiments, the fabric of described basic unit forming section and patterned layer laying section can be relatively independent, after forming respectively the basic unit 10 and patterned layer 11 of hygrometric state on two fabrics, then basic unit 10 and patterned layer 11 are transferred on same fabric to dewater combination, drying and other steps.For example, shown in Fig. 6, the forming part 22 in an embodiment, its basic unit's forming section comprises flow box 221 and corresponding fabric 222, its patterned layer laying section comprises that cloth spills 223 and corresponding fabric 224.Fabric 222 contacts at roll body 225 places with fabric 224.From different in Fig. 5, be, the fibrous suspension that flow box 221 sprays is shaped to the basic unit 10 of hygrometric state on fabric 222, and cloth spills 223 fibrous suspensions that spray form the patterned layer 11 of hygrometric state on fabric 224, and patterned layer 11 is transferred in the basic unit 10 of fabric 222 at roll body 225 places, then move to constantly dehydration and then generation combination in wet transfer portion 30 processes.Understandably, can secondary transfer equipment such as vacuum adsorption box commonly used in the industry etc. be set in transfer place, be beneficial to patterned layer 11 be transferred in basic unit 10, and the patterned layer 11 and the basic unit 10 that are beneficial to after combination are transferred on wet transfer portion 30.Because be first distinguishes moulding on different fabrics, then shifted combination, can avoid the fibrous suspension that forms patterned layer 11 to be sprayed directly on the risk that basic unit 10 causes the destruction of basic unit 10.
In addition, described patterned layer laying section can also comprise that auxiliary cloth spills head, for laying on basic unit's paper web, is different from described cloth and spills a slurry of 203,213,223 and be different from described cloth with formation and spill 203,213,223 a formed patterned layer paper web.These auxiliary cloth spill head can be distributed in the downstream that cloth spills head, also is distributed in the different lateral position of fabric.In addition, also can spill 203,213,223 for spraying different slurries by controlling wherein the cloth of a part, and make the cloth of part spill 203,213,223, play the effect that auxiliary cloth spills head.For example, these auxiliary cloth spill head and can, for described being equipped with above patterned layer, re-laying one deck patterned layer, be used to form the patterned layer 11 of hierarchical structure.Again for example, as shown in Figure 4, can will be numbered b, the cloth of d spills 203 and is set to auxiliary cloth and spills head, is different from other cloth for injection and spills the fibrous suspension that head sprays, thereby form the patterned layer with various aberration 11 of parallel distributed in basic unit 10.
The present invention also correspondence provides a kind of papermaking process that is carried out papermaking by above-mentioned paper making equipment.Its step of papermaking process provided by the invention comprises:
Utilize the first slurry moulding basic unit that manufactures paper with pulp in basic unit's forming part;
In patterned layer laying section, utilize the second slurry to form patterned layer at basic unit's local location, and the extremely wet transfer portion of basic unit's web transfers that this is formed with to patterned layer, the retention of whiteness of the retention of whiteness of described the first slurry and the second slurry has difference; And
This paper web is transferred to drying section and paper web is carried out to drying from wet transfer portion.
Hereinafter in the explanation to this papermaking process, the first slurry be the fibrous suspension that contains chemical pulp be example, the second slurry be the fibrous suspension that contains high yield pulp be example, understandably, the first slurry and the second slurry should not be subject to the restriction of this concrete embodiment, and the various slurries that are used to form basic unit 10 and patterned layer 11 of mentioning hereinbefore are all feasible.
Due to patterned layer 11, in basic unit 10, be that part is laid, and thin thickness, the scope of the fibrous suspension used in the more general paper paper-making process of the scope of the fibre concentration of the suspension that contains high yield pulp of understandable laying is wider, preferably 0.01% ~ 20%, be routed in basic unit 10 as long as meet the suspension that contains high yield pulp, can form fibre thin layer after drainage and get final product.
When the slurry that utilizes patterned layer laying section will contain high yield pulp forms patterned layer 11, corresponding slurry can be injected directly in the basic unit 10 of moulding, corresponding pulp jets can also be formed on corresponding fabric after patterned layer 11 again patterned layer 11 is shifted with basic unit's 10 combinations.Understandably, because patterned layer 11 and basic unit 10 are hygrometric state, it is in conjunction with being because again arrange tangling of occurring of patterned layer 11 and basic unit 10 its fiber in drainage, dry process is fixed.
Due to basic unit's 10 wet webs in undried situation, its intensity is very low, understandable described cloth spills head should close as much as possible basic unit 10 directly toward the suspension that sprays in basic unit 10 containing high yield pulp the time, speed containing the injection of the suspension of high yield pulp is identical with the speed that basic unit 10 moves simultaneously, to reduce as far as possible high yield pulp on being routed to wet web the time, to the impact of wet web, prevent from causing because laying high yield pulp the generation of the paper defects such as basic unit's 10 broken holes.
Further, described cloth spills head directly when spraying the suspension that contains high yield pulp in basic unit 10, spills the fibrous suspension containing high yield pulp for continuous cloth as far as possible, while preventing that the pulse feature slurry is routed to basic unit 10, basic unit 10 is caused to damage.In certain embodiments, when cloth spills the continuous whitewashing of head, the patterned layer formed on basic unit's paper web is rendered as continuous linear shape or band shape.
Further, papermaking process provided by the invention also comprises the steps: this paper web of illumination and makes this basic unit and patterned layer generation aberration, thereby makes patterned layer present corresponding pattern in basic unit.Understandable, due to when paper web carries out drying and in the following process process, also can accept natural lighting, so this step must not need to process targetedly separately.But, as an optional embodiment, can carry out the UV-irradiation processing to the paper web after moulding, so that high yield pulp accelerates brightness reversion, pattern is manifested fast.For example, can in dry process, adopt corresponding illumination apparatus to be irradiated operating paper web.
The present invention utilizes the easily characteristic of brightness reversion of the poor slurry of retention of whiteness (for example high yield pulp), regular brightness reversion zone is set, make the brightness reversion zone present pattern, avoid people to cause producing because of paper from yellowing the misunderstanding that paper is " old " paper, can enlarge the scope of application of high yield pulp, the high yield pulp that has solved long-term puzzlement people utilizes problem.
Claims (15)
1. a paper, comprise basic unit and the patterned layer of being combined with basic unit, described patterned layer occupies the local area of basic unit, described basic unit is formed by the first slurry, described patterned layer is formed by the second slurry, there is difference between the retention of whiteness of the retention of whiteness of the first slurry and the second slurry, thereby make between described basic unit and patterned layer produce aberration and the pattern of patterned layer is presented in basic unit.
2. paper as claimed in claim 1 is characterized in that: the thickness of patterned layer is groundwork thickness 1/20 ~ 1/2.
3. paper as claimed in claim 1 is characterized in that: described basic unit and patterned layer are tangled fixed and are combined by the sizing material forming process, institute is fibrous separately.
4. paper as claimed in claim 1, it is characterized in that: described patterned layer comprises the first patterned layer and the second patterned layer, described the first patterned layer and the second patterned layer are used different slurries to form, and make between the first patterned layer and the second patterned layer and produce aberration.
5. paper as claimed in claim 1, it is characterized in that: described basic unit is formed by chemical pulp, and described patterned layer is formed by high yield pulp; Perhaps described basic unit is formed by chemical pulp, and described patterned layer is formed by the mixed slurry of chemical pulp and high yield pulp; Perhaps described basic unit is formed by the mixed slurry of chemical pulp and high yield pulp, and described patterned layer is formed by high yield pulp; Perhaps described basic unit and patterned layer form by the mixed slurry of chemical pulp and high yield pulp.
6. paper as claimed in claim 1, is characterized in that: on described patterned layer is vertical in basic unit, form continuous pattern.
7. the paper making equipment for the manufacture of the described paper of any one in claim 1-6 item, comprise forming part, wet transfer portion and drying section, it is characterized in that: described forming part comprises basic unit's forming section and patterned layer laying section, described basic unit forming section comprises flow box and corresponding fabric, described flow box for being configured as basic unit by the first slurry on fabric, described patterned layer laying section comprises that at least one cloth spills head, at least one described cloth spills head for the second slurry being formed in basic unit to the patterned layer of the local area that occupies basic unit, there is difference between the retention of whiteness of the retention of whiteness of described the first slurry and the second slurry, described wet transfer portion is for being transferred to drying section by the above-mentioned basic unit's paper web that is formed with patterned layer, described drying section is for carrying out drying to this paper web.
8. paper making equipment as claimed in claim 7 is characterized in that: at least one described cloth of described patterned layer laying section spills the downstream that head is arranged on flow box, and for the second slurry being sprayed directly in basic unit to form patterned layer.
9. paper making equipment as claimed in claim 7, it is characterized in that: described patterned layer laying section has corresponding fabric, the fabric of described patterned layer laying section and basic unit's forming part joins at a roll body place, described patterned layer laying section forms patterned layer on its corresponding fabric, and by described roll body, patterned layer is transferred on the fabric at basic unit place and patterned layer is combined with basic unit.
10. paper making equipment as claimed in claim 7 is characterized in that: described patterned layer laying section also comprises that auxiliary cloth spills head, is different from for injection slurry that at least one described cloth spills head and is different from least one described cloth with formation and spills a formed patterned layer.
11. one kind is utilized the papermaking process that in claim 7-10 item, the described paper making equipment of any one carries out papermaking, step comprises:
Utilize the first slurry moulding basic unit that manufactures paper with pulp in basic unit's forming part;
In patterned layer laying section, utilize the second slurry to form patterned layer at basic unit's local location, and basic unit's web transfers that this is formed with to patterned layer has difference to wet transfer portion between the retention of whiteness of the retention of whiteness of described the first slurry and the second slurry; And
This paper web is transferred to drying section and paper web is carried out to drying from wet transfer portion.
12. papermaking process as claimed in claim 11, it is characterized in that: also comprise this paper web of illumination and make this basic unit and patterned layer generation aberration, thereby make patterned layer present the step of corresponding pattern in basic unit, above-mentioned illumination is the natural lighting that receives in the process of processing of paper web or the paper web after moulding is carried out to the UV-irradiation processing.
13. papermaking process as claimed in claim 11 is characterized in that: the speed that slurry sprays in patterned layer laying section is identical with the speed that basic unit moves.
14. papermaking process as claimed in claim 11 is characterized in that: described basic unit is formed by chemical pulp, and described patterned layer is formed by high yield pulp; Perhaps described basic unit is formed by chemical pulp, and described patterned layer is formed by the mixed slurry of chemical pulp and high yield pulp; Perhaps described basic unit is formed by the mixed slurry of chemical pulp and high yield pulp, and described patterned layer is formed by high yield pulp; Perhaps described basic unit and patterned layer form by the mixed slurry of chemical pulp and high yield pulp.
15. papermaking process as claimed in claim 11, it is characterized in that: while utilizing patterned layer laying section to form patterned layer, the second slurry is injected directly in the basic unit of moulding so that the patterned layer and the basic unit that form carry out combination, or patterned layer is shifted to be combined with basic unit again after the second slurry is formed separately to patterned layer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310391736.1A CN103469694B (en) | 2013-09-02 | 2013-09-02 | Paper making equipment and papermaking process |
| CN201610087389.7A CN105714615B (en) | 2013-09-02 | 2013-09-02 | The paper manufactured using the slurry of retention of whiteness difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310391736.1A CN103469694B (en) | 2013-09-02 | 2013-09-02 | Paper making equipment and papermaking process |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610087389.7A Division CN105714615B (en) | 2013-09-02 | 2013-09-02 | The paper manufactured using the slurry of retention of whiteness difference |
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| CN108699772A (en) * | 2016-02-08 | 2018-10-23 | Gpcp知识产权控股有限责任公司 | The method that paper product is made using mold roll |
| CN109338785A (en) * | 2018-11-10 | 2019-02-15 | 长沙云聚汇科技有限公司 | A kind of nonwoven paper cloth processing unit (plant) |
| US10927502B2 (en) | 2016-02-08 | 2021-02-23 | Gpcp Ip Holdings Llc | Molding roll for making paper products |
| US11136719B2 (en) | 2016-02-08 | 2021-10-05 | Gpcp Ip Holdings Llc | Methods of making paper products using a molding roll |
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| CN103469694B (en) | 2016-08-17 |
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