CN1243528C - Absorbing products - Google Patents
Absorbing products Download PDFInfo
- Publication number
- CN1243528C CN1243528C CN 200410008042 CN200410008042A CN1243528C CN 1243528 C CN1243528 C CN 1243528C CN 200410008042 CN200410008042 CN 200410008042 CN 200410008042 A CN200410008042 A CN 200410008042A CN 1243528 C CN1243528 C CN 1243528C
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- Prior art keywords
- printing
- egative film
- area
- moisture permeability
- thin film
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Images
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- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
In the absorptive article 1, a liquid impermeable and moisture permeable back sheet 3 is formed with a printed part showing letters, shapes, or symbols, and it has 60-100 per inch of the line number of the print dot and 30-80% of print dot concentration in the printed part, and 18% or more ratio of apparent area in the printed part to the back sheet area.
Description
Technical field
The present invention relates to the absorbing products of disposable diaper or sanitary napkin etc., more particularly, relate to the absorbing products that on the egative film of liquid impermeability, forms printing.
Background technology
At the egative film that is used for absorbing products such as disposable diaper or sanitary napkin,, print various patterns etc. sometimes for outward appearance of improving these absorbing products etc.Egative film as the printing of having implemented this pattern etc. uses the poisture-penetrability egative film (for example, with reference to special table 2000-513645 communique) that is made of the microporosity thin film in recent years always.But if the egative film that is made of the microporosity thin film is implemented printing, printing ink blocks the minute aperture that forms on this thin film, and the moisture permeability of egative film reduces.Humidity in the dressing as a result rises, and is easy to generate sultry or erythra.From the design that improves goods, the viewpoint that improves added value, preferred printing area is big.If but made printing area big, then aforesaid disadvantage would become remarkable.Therefore, printing area was increased, generally be stick figure or the some printing etc. of only implementing printing in a part.
The known printing film (opening flat 7-278329 communique) that enforcement printing on the microporosity thin film is also arranged with reference to the spy.The purpose of this printing film is that when solution was made the microporosity thin film if sneak into pigment, dark colour was adjusted the problem of difficulty.In this patent documentation, put down in writing:, still have excellent air permeability and poisture-penetrability even whole enforcement of microporosity thin film is printed.Its reason comprises: the degree of the thin thickness of printing ink and clogged with ink micropore is little.As concrete printing condition, the size of having put down in writing pixel in photogravure is 175 lines/2.54 centimetre (1 inches).But, when the technology implementation large tracts of land of putting down in writing in using this patent documentation is printed, be difficult keeping the reduction that prevents poisture-penetrability under the distinctiveness situation of printing.
Summary of the invention
Therefore, the present invention is a purpose with the design that improves goods, provides in the absorbing products that has printed pattern etc. on the egative film of poisture-penetrability, even printing area increases, the poisture-penetrability of egative film also maintains high-caliber absorbing products.
The printing of implementing at egative film is normally to be called as a plurality of gatherings of small printing of site and to constitute one by one pattern.Present inventors find: even the actual print area of this printed patterns (constituting the area summation of the site one by one of pattern) is identical, because varying in size of the dot area of this printed patterns of formation, so the degree of the aeration of printing obstruction microporosity thin film is also different.
The present invention is based on aforementioned experience, by a kind of absorbing products is provided, wherein, on the egative film of liquid impermeability and poisture-penetrability, be formed with the printing of expression literal, figure or mark, the line number of printing net-point is that the dot density of per 2.54 centimetres (1 inches) 60～100 and printing net-point is 30～80% in this printing, the apparent area of this printing is more than 18% with respect to the ratio of egative film area, thereby has reached aforementioned purpose.
For absorbing products of the present invention,, but still can keep high poisture-penetrability although on egative film, be printed with various patterns.Therefore,, can not be the high humility state in the dressing, when preventing sultry and erythra, owing to there is pattern to make the added value raising for absorbing products of the present invention.
Description of drawings
Fig. 1 is for watching the plane graph of the flat type disposable diaper of absorbing products of the present invention from the top flat side.
Fig. 2 represents the pattern of printing.
Fig. 3 is for amplifying the accompanying drawing of expression printing.
The specific embodiment
Below based on embodiment preferred, the present invention will be described with reference to accompanying drawing.Fig. 1 represents that absorbing products of the present invention is applicable to an embodiment of flat type disposable diaper.In these figure, the disposable diaper of symbol 1 expression deploying type.
Diaper 1 comprises top flat 2 and the egative film 3 of liquid impermeability and the absorber 4 of the liquid retainability between top flat 2 and egative film 3 of liquid permeability.Absorber 4 and thin hourglass shape in the middle of the corresponding zone of thigh lower area (lower gear zone) diaper 1 is bent to form, top flat 2 and egative film 3 also adapt with the shape of absorber 4, and its zone corresponding with strand lower area of diaper 1 is bent to form.Therefore, absorber 4 is gripped by top flat 2 and egative film 3.
Go up to dispose at the waist flap (waist flap) 5,5 ' of dorsal part that stretches out to foreign side from the front and back of absorber 4 and veutro and when wearing diaper 1, be used to make the waist flap 5,5 ' to attach the banded elastic telescopic parts 5a of wearer's body, 5a ' with extended state.In addition, the pair of leg flap (leg flap) 6,6 ' that stretches out to foreign side at the left and right sides edge part from absorber 4 is gone up the elastic telescopic parts 6a that disposes 3 wire with extended state, 6a '.Like this, by these elastic telescopic parts 5a, 6a shrinks and has just formed waist rivel W of portion and the shank rivel L of portion.
Dispose three-dimensional rivel respectively in the left and right sides of diaper 1 one and form, be used to cover the sidepiece of top flat 2 with sheet 7,7.Each three-dimensional rivel forms with sheet 7, and when its lateral part and end, front and back were bonded on the top flat 2, its medial part was a free state.In addition, on the lateral margin of this medial part, vertically be fixed with elastic telescopic parts 7a, 7a along it.Like this, by the contraction of elastic telescopic parts 7a, the aforementioned medial part that three-dimensional rivel forms with sheet 7 erects, and forms the three-dimensional rivel R of portion that diaper neutrality plays wearer's bodyside.
Have a pair of set tool 8 that constitutes by fixing band (tape fastener) respectively at the both lateral sides edge of the waist flap 5 of dorsal part, in addition, on the egative film 3 of the waist flap 5 ' of veutro, be pasted with and the quilt that band (landing tape) etc. constitutes by orthogonal quilt and tool (not shown).Like this, when wearing the disposable diaper 1 of the present embodiment, set tool 8,8 is fixed in by on the tool.Run through a plurality of elastomeric elements 9 of laterally disposing of diaper with extended state in that the diaper at the configuration position of set tool 8 is laterally inboard around health.Because the contraction of this elastomeric element has just formed the D of rivel portion around health.
In these parts that constitute diaper 1,, can use various non-woven fabrics or perforated film for example as top flat 2.As absorber 4, can use to coat with tissue paper that the mixture of pulp fibers and super absorbent polymer particles forms.Egative film 3 is made of the moisture-permeable film 3a of microporosity and the laminate of non-woven fabrics 3b.In this case, the configuration of egative film 3 makes the non-woven fabrics 3b that constitutes it foreign side towards diaper.In addition, moisture-permeable film 3a and non-woven fabrics 3b vary in size, and moisture-permeable film 3a is identical or bigger than it substantially with absorber 4, and non-woven fabrics 3b is bigger than moisture-permeable film 3a, constitutes the profile of diaper 1.In the present embodiment, the zone that moisture-permeable film 3a and non-woven fabrics 3b are overlapped is called egative film 3.
In the poisture-penetrability thin film 3a of egative film 3, with the forward surface (hereinafter referred to as the non-woven fabrics forward surface) of non-woven fabrics 3b on be formed with the printing that constitutes by (following patterns etc. that they are generically and collectively referred to as) such as literal, figure and/or marks.That is, printing is between poisture-penetrability thin film 3a and non-woven fabrics 3b.Can be in sight thereby make printing pass through non-woven fabrics 3b from the outside.Printing forms with hectographic printing or photogravure.Control aspect from aftermentioned version point especially preferably forms by hectographic printing.One of the patterns of printing etc. are illustrated in Fig. 2.As shown in Figure 2, printing P is by cancellate apperance and animal figures constitute in length and breadth.Owing on poisture-penetrability thin film 3a, be formed with printing P, therefore to compare before this poisture-penetrability thin film 3a after the printing and the printing, its moisture permeability reduces.Therefore, the moisture permeability of egative film 3 integral body also reduces.The moisture permeability of preferred egative film 3 reduces below 30% than printing is preceding, and is more preferably below 20%, further preferred below 10%.From the viewpoint that the moisture permeability that suppresses egative film 3 integral body reduces, the moisture permeability of preferred printing P with respect to printing before this printing P or not printing be more than 60%, further preferred more than 80%.Similarly, the moisture permeability of egative film 3 integral body and not the difference of the moisture permeability of printing be preferably 0.8g/ (100cm
2H) below, be preferably 0.3g/ (100cm especially
2H).In addition, the moisture permeability of printing P is preferably 1g/ (100cm with the difference of the moisture permeability of printing not
2H) below, be preferably 0.5g/ (100cm especially
2H) below.
Fig. 3 represents the state after the printing amplification of pattern shown in Figure 2.Printing is made of a plurality of sites of printing with aforesaid print process.In same figure, stain is a printing net-point.Usually, the site with respect to diaper laterally and length direction respectively with uniformly-spaced configuration.In the zone of printing technology, the number of site and area are represented with line number and dot density respectively usually.So-called line number is illustrated in the net number of configuration between per 2.54 centimetres (1 inches), and the line number distance of neighbour node and site more at most is narrow more, and on the contrary, the line number distance between the site at least increases.So-called dot density is meant the ratio of the dot area summation of per unit area.Therefore, line number net number more at most increases, if be same line number (number of site is identical), then dot density is high more, and the area of a site is big more.Dot density generally has a significant impact the outward appearance of pattern etc.Because dot density is high more, the actual print area of per unit area (area that in fact printing ink adhere to) increases, so pattern etc. seems distinct.In addition, when being same point density, the line number number of site more at most increases, and becomes more fine and close pattern etc.But if the actual print area increases, then the moisture permeability of egative film 3 reduces, so there are (trade-off) relation of offsetting in the outward appearance of pattern etc. and the moisture permeability of egative film 3.Present inventors find: be set in specific scope respectively by making dot density (actual print area) and line number, the outward appearance of each pattern etc. can be maintained on the high level, and can suppress the moisture permeability of egative film 3, even make the increases such as pattern that are formed at egative film 3, still its moisture permeability can be maintained on the high level.
In detail, the result that studies of present inventors has understood fully the following fact.As previously mentioned, although usually the dot density height then the outward appearance of pattern etc. improve, but because the actual print area (area that in fact printing ink adhere to) of per unit area increases, so the film ratio of the minute aperture obturation that makes poisture-penetrability thin film 3a of printing ink increases, and the moisture permeability of egative film 3 reduces.But find out that even identical dot density, if the shape of printing net-point is diminished, then the reduction rate of moisture permeability is present in lower scope.Specifically, find out that if the area of site is bigger scope, then the reduction rate of actual print area and moisture permeability has dependency relation completely, if but the area of each site reaches certain below the value, then the reduction rate with respect to actual print area moisture permeability reduces.Its reason is not clear and definite fully as yet, but the present inventor infers that following reason is arranged.Think that the coated surface of printing ink or closing force are stable, fully the minute aperture among the poisture-penetrability thin film 3a are blocked when the area of each site is big.If the area of each site diminishes, then,, therefore think that aeration is maintained because filming of printing ink can't covered with the form of complete driving fit with respect to the surface roughness of poisture-penetrability thin film 3a.
Printing-ink generally is made of coloring agent, vehicle (vehicle) (resin, additive, solvent), and the difference of coloring agent is big, is divided into pigment and dyestuff.From sunproof viewpoint, how in coloring agent, to use pigment.Pigment is divided into organic pigment and inorganic pigment.In addition, printing-ink is divided into solvent type ink, water color ink, UV printing ink etc. according to the kind of vehicle.As resin, can use polrvinyl chloride, polyester, polyurethane, curing Colophonium, chlorinated rubber, Petropols, NC Nitroncellulose, cellulose derivative, ethyl cellulose, polyamide, acrylic resin, maleic acid resin, fumaric resin, polyketone, Lac, protein, phenolic resins, methacrylic resin, epoxy resin etc.As additive, can use wax, metallic soap, surfactant, gelating agent etc.As solvent, can use alcohol (methanol, ethanol, isopropyl alcohol, normal propyl alcohol), ester (ethyl acetate, isopropyl acetate, n-propyl acetate), aliphatic hydrocarbon (normal hexane, normal heptane, VM and P solvent naphtha), glycol ether, ethylene glycol, aromatic hydrocarbons (toluene, dimethylbenzene), ketone, water etc.
Also recognized by representing that with printing net-point pattern etc. can produce following advantage.That is, when implementing the printing of light color, for it being formed with writing definition printing (solid printing), with respect to the increasing proportion of the resinous principle in the pigment ink, the tendency that therefore exists the light resistance of printing to reduce.In contrast to this, represent pattern etc., can implement the printing of outward appearance under the situation that the pigment concentration in the printing ink is reduced, and can prevent that the light resistance of printing from reducing for light color with printing net-point.From this viewpoint, the resinous principle in the preferred printing ink is 20～90 weight % with respect to the total amount of removing volatile ingredient, is preferably 30～70 weight % especially.In addition, the emptying aperture landfill in having found out resinous principle more resin being filmed printing ink at most, the therefore tendency that exists poisture-penetrability to reduce.If resinous principle is below the 70 weight % with respect to the ratio of removing the total amount of volatile ingredient in the removal ink, then the reduction of moisture permeability is little, if be below the 60 weight %, then the reduction of moisture permeability becomes littler, and is therefore preferred.But if the resin components in proportions is low excessively, then the printing ink dhering strength of filming reduces sometimes, so resinous principle is preferably more than the 40 weight % preferred especially 40～60 weight %.
Based on above experience, in the present invention, the line number that makes the printing net-point of printing is 60～100/2.54 centimetres (1 inches), is preferably 70～90/2.54 centimetres (1 inches).In addition, the dot density that makes the printing net-point of printing is 30～80%, and is preferred 30～70%, more preferably 30～50%.The line number of printing net-point is the density of foregoing printing net-point, shows with the line numerical table of per 2.54 centimetres (1 inches).The more little then site of line number is thick more.The dot density of printing net-point is the ratio of the area summation of foregoing each printing net-point with respect to the area of printing.The line number of printing net-point and dot density are taken pictures by with optical microscope printing being amplified 20 times, this photo is carried out binary conversion treatment and measure with visual analysis program.
In the present invention, if 60/2.54 centimetre of the line number less than (1 inch) of printing net-point in the printing, then printing ink enters into the minute aperture of poisture-penetrability thin film 3a easily, thereby moisture permeability is reduced, and then the distinctiveness of pattern etc. reduces.If surpass 100/2.54 centimetre (1 inch), Ban poor durability then, easy swelling is located in the site, and it can not be printed.In addition, if the some concentration less than 30% of printing net-point in the printing, then the color of pattern etc. shoals, and its outward appearance reduces.If surpass 80%, then because the actual print area increases, the moisture permeability of egative film 3 reduces.If it is the dot density of printing net-point is below 70%,,, therefore preferred because the reduction of moisture permeability further reduces in particular for below 50%.
In addition, in the present invention, except the line number and dot density of aforesaid printing net-point, the value that makes apparent area rate on the egative film is more than 18%, and is preferred more than 25%.In order to ensure making egative film 3 have necessary moisture permeability, the preferred little situation of apparent area rate, if but apparent area rate less than 18% then reduce by the added value effect of implementing the commodity that pattern etc. produces, implement pattern etc. and will not have meaning.There is no particular restriction for the higher limit of apparent area rate, can be 100%.From guaranteeing the viewpoint of enough moisture permeabilitys, the preferred upper limit value is about 60%.The apparent area rate for the area of egative film divided by the summation that in conjunction with distance is the area (this area is called apparent area) in the most peripheral of each printing of delimiting of the adjacent printing net-point below the 1mm, multiply by 100 resulting values then.Patterns etc. can only be made of site portion, perhaps also can be made of printing and site portion.When constituting pattern etc. by writing definition printing part and site portion, can from all printing areas, deduct writing definition printing printing area partly, try to achieve apparent printing area rate on the egative film of site portion.In this case, make also that apparent printing area rate is more than 18% on the egative film of site portion.
In addition, in the present invention, the actual print area occupation ratio is preferred 4～40% on the egative film, and more preferably 10～20%.The actual print area occupation ratio multiply by 100 resulting values then for the summation of the value (this value is called the actual print area) that multiplies each other divided by the dot density and the apparent area of each printing branch with the area of egative film on the egative film.If the actual print area occupation ratio is in this scope on the egative film, not only can guarantee necessary moisture permeability, and can improve the added value of commodity, therefore preferred.
About apparent area rate and actual print area occupation ratio, in the zone of egative film 3, also very important at the area of the printing that forms with in opposite directions zone of absorber 4 (below, this zone is called absorber zone in opposite directions).This is because absorber accounts for the major part in the zone of egative film 3 in the zone in opposite directions, and steam most be discharged into the outside in the zone in opposite directions by absorber.From this viewpoint, in the present invention, make be formed at absorber in opposite directions the apparent area of each printing in zone summation with respect to this absorber in opposite directions the ratio of area in zone be preferably 25～100%, 35～85% (this value is called apparent area rate on the absorber) more preferably.In addition, make be formed at absorber in opposite directions the actual print area of each printing in zone summation with respect to this absorber in opposite directions the ratio of area in zone be preferably 6～80%, 15～40% (this value is called actual print area occupation ratio on the absorber) more preferably.
In the aforementioned poisture-penetrability thin film 3a that implements printing, the preferred 0.5g/ (100cm of the moisture permeability of printing
2H) more than, preferred especially 2g/ (100cm
2H) more than.Preferred 1.5g/ (the 100cm of moisture permeability in pattern-free zone among the poisture-penetrability thin film 3a (promptly not printing)
2H) more than, preferred especially 2.2g/ (100cm
2H) more than.In addition, the egative film 3 that forms at the outside of poisture-penetrability thin film 3a laminated nonwoven fabric 3b, its moisture permeability is preferably 1.5g/ (100cm
2H) more than, be preferably 1.8g/ (100cm especially
2H) more than.The moisture permeability of egative film 3 is tried to achieve by moisture permeability and the pattern-free part moisture permeability separately of measuring printing in the egative film 3.The all moisture permeabilitys of egative film are by measuring count (for example, per 3 pieces of each n=6 of diaper) of the meansigma methods that obtains with respect to diaper, ask for their meansigma methods and obtain.Under 30 ℃, 90%RH, use φ 60mm cup, measure moisture permeability according to JIS Z0208.When egative film being taken out mensuration from diaper, water etc. become egative film 3 monomeric states with absorber.
As other assay methods of egative film moisture permeability, can ask for all moisture permeabilitys of egative film from the moisture permeability of printing and the moisture permeability of pattern-free part according to following method.In addition, mean that with printing apparent area rate in the following formula moisture permeability of printing measures the printing area rate on apparent in the part (being equivalent to φ 60mm).Similarly, apparent printing moisture permeability is meant the apparent moisture permeability that goes up the per unit area of the part of printing in the printing.
Apparent printing moisture permeability=(printing moisture permeability-pattern-free part moisture permeability * (1-printing apparent area rate))/printing apparent area rate
Apparent area rate+pattern-free part moisture permeability * (apparent area rate on the 1-egative film) on all moisture permeability=apparent printing moisture permeability * egative film of egative film
As the base material that is used for poisture-penetrability thin film 3a, can exemplify out hydrophobic thermoplastic resin and the small inorganic filler or the melting mixings such as organic polymer of not having the compatibility that constitute by calcium carbonate etc., form thin film, this thin film single shaft or biaxial stretch-formed and microporosity thin film that obtain.As described thermoplastic resin, can exemplify out polyolefin.As this polyolefin, can exemplify out height to low density polyethylene (LDPE), linear low density polyethylene, polypropylene, polybutene etc., they can be used alone or as a mixture.From keeping the mechanical strength of thin film, thereby and the aspect that is difficult for can being kept poisture-penetrability, hole by clogged with ink set out, the diameter in its surperficial hole of microporosity thin film is preferably 0.1～10 μ m, is preferably 0.5～5 μ m especially.As preferred poisture-penetrability thin film 3a, can exemplify out the spy relevant and open the poisture-penetrability thin film of putting down in writing in the clear 63-146943 communique with the previous application of the applicant.
In the present embodiment, printing is formed at non-woven fabrics forward surface among the poisture-penetrability thin film 3a, but replaces, and printing also can be formed at the forward surface of absorber among the poisture-penetrability thin film 3a.In this case, in order to see printing thoroughly from the diaper outside, preferred egative film 3 have fixed light transmission rate.From this viewpoint, the light transmission rate that is used for the poisture-penetrability thin film 3a of egative film 3 is preferably 30～80%, and more preferably 35～80%, more preferably 40～80%.Light transmission rate is measured with reflection-transmitance meter (in (strain) village color institute system make, trade name " HR-100 ").Measure full gloss transmitance T with the A light source in the mensuration
tValue).Measure on the sample 10 points arbitrarily, calculate its meansigma methods, with this value (below, when mentioning light transmission rate, just be meant value) with this method mensuration as light transmission rate.
When even printing is formed at arbitrary of poisture-penetrability thin film 3a, in order to see printing thoroughly from the diaper outside, the preferred apparatus of non-woven fabrics 3b is decided light transmission rate to some extent.From this viewpoint, the light transmission rate of preferred non-woven fabrics 3b is more than 50%, more preferably more than 55%, more preferably more than 60%.From same viewpoint, as non-woven fabrics 3b, preferred use can access the quantitative and thickness of described light transmission rate.Specifically, its quantitative preferred 5～45g/m
2, preferred especially 10～40g/m
2In addition, its thickness is preferably 0.1～3.0mm, is preferably 0.2～2.0mm especially.
As non-woven fabrics 3b, for example can exemplify out the fiber that constitutes separately by thermoplastic resins such as polyester such as polyolefin such as polyethylene or polypropylene, polyethylene terephthalate, polyamide or use these resins more than 2 kinds and non-woven fabrics that the composite fibre with core-sheath-type or parallel type structure that constitutes constitutes.Non-woven fabrics preferably uses air permeability method (air through), meltblown, heat sealing method, spun-bond process, the general method for making manufacturings such as (suction heat bond) of vacuum heat viscosity method.
The background color of preferred non-woven fabrics 3b be white, or is unusual weak color, but can carry out painted in the scope of the outward appearance of the distinctiveness of not damaging printing (clarity) and diaper 1.
More than, be that the basis describes the present invention with its embodiment preferred, but scope of the present invention is not limited to described embodiment, and all changes can be arranged.For example as previously mentioned, printing can be formed among the poisture-penetrability thin film 3a arbitrary.In addition, in described embodiment, egative film 3 is made of the laminate of poisture-penetrability thin film and non-woven fabrics, but replaces, and also can constitute egative film by single poisture-penetrability thin film.Even in this case, printing also can be formed on arbitrary of poisture-penetrability thin film.
Below, in conjunction with the embodiments the present invention is described in more detail.But scope of the present invention is not limited to these embodiment.
[embodiment 1]
Use contains the polyethylene stretching microporosity thin film of calcium carbonate particle as the poisture-penetrability thin film.Quantitative (weight of unit are) of this thin film is 20g/m
2, moisture permeability is 2.2g/ (100cm
2H).This thin film is used for disposable diaper for baby " メ リ one ズ " the band fixed pattern that Kao Corp makes.The surface of this thin film is observed the diameter average out to 0.6 μ m (1000 times of multiplying powers) in the hole on surface with ultramicroscope.Use six coloring agent printing machines or use and contain organic pigment of all kinds and polyurethane resin, on the single face of this thin film, carry out pattern printing shown in Figure 2 as the hectograph colored ink of printing ink.The details of printing is as shown in table 1.With hotmelt with quantitative 15g/m
2Nonwoven layer be pressed onto on the printing.The moisture permeability of the egative film that obtains is 2.1g/ (100cm at printing not
2H).Use the egative film that obtains like this and use other known materials to make disposable diaper shown in Figure 1.
[comparative example 1]
Except being that 100% writing definition printing carries out the printing of pattern all the other and the embodiment 1 identical disposable diaper that makes with dot density.
[comparative example 2]
To have implemented the commercially available disposable diaper that prints (infant of manufacturing disposable diaper (L type)) on the egative film of poisture-penetrability is comparative example 2.
[performance evaluation]
For the diaper that obtains in embodiment and the comparative example, measure various area occupation ratios and moisture permeability.In addition, in order to following method the outward appearance of pattern is estimated.It the results are shown in table 1.
[ocular estimate of pattern]
Estimate with the evaluation group that 3 people form.From the distance of about 30cm diaper is observed, with the rugosity of the concentration of the color of pattern, site and distinctiveness (clarity) as estimating point, with zero, △, * quality of three grades of evaluation outward appearances.When participant's evaluation not simultaneously, represent with its scope.
Zero: do not see the site of pattern, or pattern is distinct and when good.
△: not obvious but can see the site time, or distinctiveness shortcoming slightly.
*: in the time of can clearly seeing the site, or when of light color, not distinct.
Table 1
| Embodiment 1 | Comparative example 1 | Comparative example 2 | |
| The line number of printing net-point (1/2.54 centimetre) | 75 | Writing is clear | 50 |
| The dot density of printing net-point (%) | 40 | - | Average 30 (25～35) *1 |
| Apparent area rate (%) on the egative film | 28 *2 | 30 | 9 |
| Actual print area occupation ratio (%) on the egative film | 11 | 30 | 3 |
| Apparent area rate (%) on the absorber | 61 *3 | 65 | 20 |
| Actual print area occupation ratio (%) on the absorber | 24 | 65 | 6 |
| The moisture permeability of printing (egative film) (g/ (100cm 2·h)) | 2.0 | 1.0 | 1.1 |
| The moisture permeability of printing (poisture-penetrability thin film) (g/ (100cm 2·h)) | 2.1 | 1.0 | 1.2 |
| Moisture permeability (g/ (the 100cm that egative film is all 2·h)) | 2.0 | 1.4 | 1.5 |
| Outward appearance | ○ | ○ | ×～△ |
*1: color or numerical value are different because of the difference of position.
*2: the apparent printing area of site portion is 28%, and the printing area of printing is 2%.
*3: the apparent printing area of site portion is 61%, and the printing area of printing is 4%.
Can see that from result shown in the table 1 diaper of embodiment 1 demonstrates good surface appearance, and have very high moisture permeability.In contrast to this, with the diaper of the figuratum comparative example 1 of printing formation, though the outward appearance of pattern is good, moisture permeability is low-level.In addition, the outward appearance of its poisture-penetrability of the diaper of comparative example 2 and pattern does not all reach high level.
[embodiment 2～10]
Use offset press, the printing-ink that the organic pigment of using cyan is is under condition shown in the table 2, and (but moisture permeability is 2.0g/ (100cm at the thin film identical with employed poisture-penetrability thin film among the embodiment 1
2H)) print on.Other rabbit patterns that pattern uses net-point printing to obtain carry out.For the egative film that obtains, measure various area occupation ratios and moisture permeability.In addition, when measuring the aberration of pattern, the outward appearance of pattern is estimated with preceding method with following method.It the results are shown in table 2.
[embodiment 11]
(but moisture permeability is 2.3g/ (100cm to use the thin film identical with employed poisture-penetrability thin film among the embodiment 1
2H)), on whole surface, carry out single color printing.Printing ink for the embodiment 1 green organic pigment that mainly contains polyurethane resin of the same race be printing ink, the ratio of the resinous principle that printing ink is filmed is about 45%.Other and embodiment 2 identical carrying out.For the egative film that obtains, measure various area occupation ratios and moisture permeability.In addition, when measuring the aberration of pattern, the outward appearance of pattern is estimated with preceding method with following method.It the results are shown in table 2.Even on whole surface, print, make that by comparing the resinous principle of printing ink is few with embodiment 1, also can obtain the also very high product of moisture permeability with the big ratio of real area rate on egative film.
[comparative example 3～6]
Use with embodiment 11 in the identical printing ink of employed printing ink, carry out 11 identical operations with embodiment.For the egative film that obtains, measure various area occupation ratios and moisture permeability.In addition, when measuring the aberration of pattern, the outward appearance of pattern is estimated with preceding method with following method.It the results are shown in table 2.
[mensuration of pattern aberration]
Use Japanese electric color system colour difference meter nR-1, egative film is put on the white paper, poor (the Δ EH) of the aberration that the mensuration pattern-free partly divides and the aberration of printing.The concentration of the color in the big then expression of Δ EH is dense.Mensuration is that the formation face side with printing in the egative film is that object carries out.If Δ EH is more than 20, then distinct slightly, be preferably more than 25.
Table 2
| Embodiment | Comparative example | |||||||||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 3 | 4 | 5 | 6 | |
| The line number of printing net-point (1/2.54 centimetre) | 65 | 85 | 100 | 85 | 55 | 55 | 75 | 120 | ||||||
| The dot density of printing net-point (%) | 30 | 50 | 70 | 30 | 50 | 70 | 30 | 50 | 70 | 40 | 20 | 90 | 20 | 90 |
| Apparent area rate (%) on the | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 100 | 100 | 100 | 100 | 100 |
| Actual print area occupation ratio (%) on the egative film | 5.4 | 9.0 | 12.6 | 5.4 | 9.0 | 12.6 | 5.4 | 9.0 | 12.6 | 40 | 20 | 90 | 20 | 90 |
| The moisture permeability of printing (poisture-penetrability thin film) (g/ (100cm 2·h)) | 2.0 | 1.9 | 1.9 | 2.1 | 2.0 | 1.9 | 2.1 | 2.0 | 1.9 | 1.7 | 1.9 | 1.1 | 2.0 | 1.0 |
| Moisture permeability (g/ (the 100cm that egative film is all 2·h)) | 2.1 | 2.1 | 2.0 | 2.2 | 2.1 | 2.1 | 2.2 | 2.1 | 2.1 | 1.7 | 1.9 | 1.1 | 2.0 | 1.0 |
| Aberration Δ EH | 20.6 | 28.5 | 36.0 | 23.2 | 29.2 | 36.8 | 25.7 | 29.9 | 37.9 | 36.2 | 16.8 | 50.5 | 21.7 | 52.2 |
| Outward appearance | △ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ○ | ×～△ | ○ | ×～△ | ○ |
Can see that from the result shown in the table 2 its pattern distinctness of the egative film of each embodiment demonstrates good surface appearance, and has very high moisture permeability.
Claims (5)
1, a kind of absorbing products, wherein on the egative film of liquid impermeability and poisture-penetrability, be formed with the printing of expression literal, figure or mark, the line number of printing net-point is that the dot density of per 2.54 centimetre 60～100 and printing net-point is 30～80% in this printing, and the apparent area of this printing is more than 18% with respect to the ratio of the area of egative film.
2, according to the absorbing products of claim 1 record, the line number of printing net-point is that the dot density of per 2.54 centimetre 70～90 and printing net-point is 30～50% in the wherein said printing.
3, according to claim 1 or 2 absorbing products of putting down in writing, wherein in the zone of egative film, the apparent area of the described printing that forms in the absorber zone in opposite directions with liquid retainability is 25～100% with respect to the ratio with the area in absorber described zone in opposite directions.
4, according to the absorbing products of claim 1 record, wherein said printing forms by hectographic printing.
5, according to the absorbing products of claim 1 record, wherein said egative film is made of the microporosity thin film, and the resinous principle that forms in the printing ink of described printing is 20～90 weight %.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003/63168 | 2003-03-10 | ||
| JP2003063168 | 2003-03-10 | ||
| JP2004038953A JP3949114B2 (en) | 2003-03-10 | 2004-02-16 | Absorbent articles |
| JP2004/38953 | 2004-02-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1530084A CN1530084A (en) | 2004-09-22 |
| CN1243528C true CN1243528C (en) | 2006-03-01 |
Family
ID=33421472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410008042 Expired - Fee Related CN1243528C (en) | 2003-03-10 | 2004-03-10 | Absorbing products |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3949114B2 (en) |
| CN (1) | CN1243528C (en) |
| TW (1) | TWI235652B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5487058B2 (en) * | 2010-09-03 | 2014-05-07 | 大王製紙株式会社 | Absorbent sheet for pet |
| JP6324281B2 (en) * | 2014-09-19 | 2018-05-16 | 花王株式会社 | Pants-type disposable diaper |
| JP6347826B2 (en) * | 2016-12-08 | 2018-06-27 | 大王製紙株式会社 | Pants-type disposable diaper |
| JP7097208B2 (en) * | 2018-03-29 | 2022-07-07 | 大王製紙株式会社 | Absorbent article and method for manufacturing absorbent article |
| CN114872467A (en) * | 2022-06-02 | 2022-08-09 | 广州爱科琪盛塑料有限公司 | Large-area printing method for bottom film of paper diaper |
-
2004
- 2004-02-16 JP JP2004038953A patent/JP3949114B2/en not_active Expired - Lifetime
- 2004-03-10 CN CN 200410008042 patent/CN1243528C/en not_active Expired - Fee Related
- 2004-03-10 TW TW93106344A patent/TWI235652B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| TWI235652B (en) | 2005-07-11 |
| JP3949114B2 (en) | 2007-07-25 |
| CN1530084A (en) | 2004-09-22 |
| JP2004290665A (en) | 2004-10-21 |
| TW200423916A (en) | 2004-11-16 |
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