CN103061200A - Novel environment-friendly stone paper and preparation method thereof - Google Patents
Novel environment-friendly stone paper and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the field of papermaking, and discloses a novel environment-friendly stone paper and a preparation method thereof. The invention provides a novel environment-friendly stone paper using short fiber to substitute a main component calcium carbonate in a traditional stone paper. The invention further provides a three-layer coextrusion environment-friendly stone paper. The environment-friendly stone paper is composed of a three-layer structure comprising a surface layer-a middle layer-a surface layer; the middle layer comprises main components of short fiber and resin; and the surface layer comprises main components of titanium dioxide and resin. Compared with performance of the traditional stone paper, the novel environment-friendly stone paper, prepared from processes comprising mixing, kneading, granulation and calendering, gains reduced specific gravity, improved physical and mechanical properties and increased size, and qualitatively changes definition, characteristics, advantages and application fields of stone paper, and has extensive application value.
Description
Technical field
The present invention relates to field of papermaking, particularly relate to a kind of novel environment friendly stone paper and preparation technology thereof.
Background technology
Paper is one of Chinese four inventions, and the main raw material of conventional paper is timber etc., and it is produced and roughly is divided into slurrying and two basic processes of papermaking.Slurrying is exactly that the raw material disassociation is become true qualities paper pulp or bleached pulp.Papermaking then is the paper pulp fiber that is suspended in the water, through the various paper that meet the requirements of being processed into.At present, along with the appearance of National Forest protective policy, paper making raw material mainly relies on import pulp to keep.Simultaneously, owing to produce a large amount of waste water in the conventional paper production process, serious environment pollution, difficulty of governance is very big.In addition, conventional paper is humidity not, corrosion, and DIMENSIONAL STABILITY and every physical mechanical can be poor, can not satisfy the specific (special) requirements in many paper usings field.Therefore, the paper production development needs innovation.
Last century, the fifties occurred take plastics, calcium carbonate and multiple auxiliary agent as raw material, with the environmental protection synthetic paper of blowing, the tape casting production.The characteristics of this environmental protection synthetic paper are that every physical mechanical can be better than conventional paper, and have the characteristics such as humidity, waterproof, good stability of the dimension, have therefore satisfied the multiple requirement of different field, have replaced conventional paper in certain fields, are the once reforms of paper industry.Novel environmental protection synthetic paper---stone paper namely appears in this change.
The characteristics of existing stone paper are that it mainly is comprised of resin and calcium carbonate.For reducing the cost of stone paper, then need to increase the ratio of calcium carbonate in the stone paper, reduce the consumption of resin with this, thereby cost is descended.But thing followed problem is, along with calcium carbonate proportion increases, its function affect is faded, and the every physical mechanical of the stone paper for preparing can descend thereupon, has caused the reduction of stone paper quality.On the other hand, reduced the ratio of resin although calcium carbonate proportion increases, therefore the stone paper proportion for preparing increased, and causes on the contrary the number of paper of actual production to reduce, thereby compressed the real space of cost.
Therefore, be necessary further to improve raw material, formula combination and the preparation method thereof of stone paper, to satisfy the requirement of each side.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the above problems, and a kind of novel environment friendly stone paper more excellent than existing stone paper quality is provided.
Another object of the present invention provides the preparation method of this this kind novel environment friendly stone paper.
To achieve these goals, the present invention has adopted following technical scheme:
The invention discloses a kind of environmentally-friendly stone paper, this environmentally-friendly stone paper comprises resin and staple fibre, described staple fibre is that fibre length is the fiber product of 10～15mm, and, can contain or not contain calcium carbonate according to the demands such as actual use rigidity of paper in this environmentally-friendly stone paper.
Among the present invention, staple fibre can be cotton short fiber, and resin can be polyethylene or polypropylene.
Further, staple fibre is preferably short velveteen, the resin preferably polyethylene.
Wherein, the percentage by weight of preferred staple fibre is 30～50%, and the percentage by weight of preferred resin is 47～67%.
Comprise also in the above-mentioned environmentally-friendly stone paper that percentage by weight is 2.2～4.5% auxiliary agent, described auxiliary agent comprises composite coupler, dispersant, fire retardant, compatilizer or slipping agent.
Further preferred, composite coupler accounts for 0.2-0.5%, and dispersant accounts for 0.5-1%, and fire retardant accounts for 0.5-1%, and compatilizer accounts for 0.5-1%, and slipping agent accounts for 0.5-1%.
The invention also discloses a kind of three-layer co-extruded environmentally-friendly stone paper, it comprises top layer and middle level, and the component in its middle level comprises staple fibre, resin and auxiliary agent; The component on its top layer comprises titanium dioxide, resin and auxiliary agent.
The component in this environmentally-friendly stone paper middle level preferably includes the staple fibre of 30-50%, the resin of 47-67% and the auxiliary agent of 2.2%-4.5% by the middle level mass percent.
The component on this environmentally-friendly stone paper top layer preferably includes the titanium dioxide of 32-64%, the resin of 33-65% and the auxiliary agent of 2.2%-4.5% by surface quality percentage.
Among the present invention, staple fibre can be cotton short fiber, and resin can be polyethylene or polypropylene.Further, in the component in above-mentioned top layer and middle level, staple fibre is short velveteen preferably, the resin preferably polyethylene, and in this polyethylene, high density polyethylene (HDPE) accounts for 55-65%, and low density polyethylene (LDPE) accounts for 25-35%, and linear low density polyethylene accounts for 5-15%.
Above-mentioned auxiliary agent comprises composite coupler, dispersant, fire retardant, compatilizer or slipping agent.Further preferred, composite coupler accounts for 0.2-0.5%, and dispersant accounts for 0.5-1%, and fire retardant accounts for 0.5-1%, and compatilizer accounts for 0.5-1%, and slipping agent accounts for 0.5-1%, respectively with the percentage calculation of middle level or surface quality.
The component in above-mentioned middle level also can further comprise calcium carbonate.
This three-layer co-extruded environmentally-friendly stone paper structure is top layer-middle level-top layer, the middle level is sandwiched between two top layers, its paper sheet thickness can be 0.08-0.15mm, the thickness on middle level and top layer then can be adjusted according to actual needs, the thickness in preferred middle level accounts for the 70%-90% of environmentally-friendly stone paper thickness, and the thickness on each top layer accounts for the 5%-15% of environmentally-friendly stone paper thickness.
The present invention also further discloses the preparation method of three-layer co-extruded environmentally-friendly stone paper, and the method comprises:
A is dried to moisture less than 2% with all components material;
B carries out mix and blend with middle layer material and skin-material under 100-110 ℃, order by merging is,
Middle layer material: in staple fibre, add auxiliary agent, mix rear adding resin;
Skin-material: in titanium dioxide, add auxiliary agent, mix rear adding resin;
The mixed middle layer material of C and respectively granulation behind vacuum kneading of skin-material obtain top layer particle and middle level particle;
D prepares top layer particle and the three-layer co-extruded calendering of middle level particle the environmentally-friendly stone paper of top layer-middle level-top layer three-decker.
Among the above-mentioned steps B, when adding the auxiliary agent mixing, the interpolation of auxiliary agent sequentially is to add successively composite coupler, dispersant, fire retardant, compatilizer, slipping agent, and adds another kind through abundant mixing behind a kind of composition of every adding again.
Among the above-mentioned steps D, adopt three-layer co-extruded five roll calendars, each section of extrusion temperature Temperature Setting is 90-110 ℃, 220-240 ℃, 100-120 ℃ in the extruder, and the calender Temperature Setting is less than 150 ℃.
Because adopt above technical scheme, beneficial effect of the present invention is:
1. introduce after the environmentally-friendly stone paper by lacking velveteen, the proportion of environmentally-friendly stone paper reduces, and the physical and mechanical propertiess such as rigidity, deflection, pliability improve, and tearing toughness is strengthened greatly, and the DIMENSIONAL STABILITY of environmentally-friendly stone paper is also better.
2. lack velveteen and in environmentally-friendly stone paper, partly or entirely replace the proportion that calcium carbonate can reduce environmentally-friendly stone paper greatly, thereby reduce the consumption of resin, so that the product cost reduction, so this kind novel environment friendly stone paper has higher economic benefit.
3, adopt the three-decker on top layer-middle level-top layer, its middle level is different with the top layer component, brings into play separately not same-action.Play a supporting role in the middle level, to the decisive action that upgrades of every physical-mechanical properties of environmentally-friendly stone paper; The top layer is bright and clean, has certain hardness, and wetting tension is high, tinctorial property is good, be conducive to printing, environmentally-friendly stone paper of the present invention is specially adapted to require the field that its physical and mechanical properties is high, size distortion is little, such as map, sea chart, the application of the aspects such as oil, geology, earthquake disaster figure, land mapping figure.
Description of drawings
Fig. 1 is the structure chart of a kind of novel environment friendly stone paper of the present invention, 1 expression middle level among the figure, 2 expression top layers;
Fig. 2 is the preparation flow figure of a kind of novel environment friendly stone paper of the present invention;
Fig. 3 rolls schematic diagram in the preparation process of a kind of novel environment friendly stone paper of the present invention, 3 expression extruders among the figure, 4 expression die heads, 5 expression calenders, 6 expression winders.
The specific embodiment
Be different from traditional stone paper, the present invention has replaced the main composition-calcium carbonate of traditional stone paper in the prior art with staple fibre as key component, the paper for preparing is compared with the performance of traditional stone paper, the fundamental characteristics that not only possesses traditional stone paper, optimization and improvement is in various degree also all arranged on properties, therefore, disclosed by the invention is a kind of novel environment friendly stone paper.
Staple fibre among the present invention is that fibre length is the fiber product of 10～15mm, can select cotton short fiber, short glass fiber etc., the wherein preferred weak point velveteen that uses.The short velveteen that the present invention uses refers to that cottonseed stays staple fibre remaining on the cottonseed after rolling, is the short cotton fiber that can not weave.Be introduced into after the environmentally-friendly stone paper, so that the quality of environmentally-friendly stone paper produces a series of variation, its outstanding beneficial effect is that the proportion of environmentally-friendly stone paper is reduced, the every physical mechanical of environmentally-friendly stone paper can be optimized, pliability and size also promote, further so that the definition of traditional stone paper, characteristic, advantage and Application Areas produce the variation of matter.Those skilled in the art can carry out suitable adjustment to the component of this environmentally-friendly stone paper according to the demand of the actual use of paper, make its every engineering properties meet demand, such as can further adding according to actual needs the components such as calcium carbonate.
A kind of three-layer co-extruded environmentally-friendly stone paper that the present invention further provides comprises top layer and middle level, and its structure is illustrated in figure 1 as: the three-decker on top layer-middle level-top layer.Wherein, the component in middle level mainly comprises staple fibre, resin and auxiliary agent.The component in preferred middle level comprises the staple fibre of 30-50%, the resin of 47-67% and the auxiliary agent of 2.2%-4.5% by the middle level mass percent among the present invention.The component on top layer comprises titanium dioxide, resin and auxiliary agent, and wherein titanium dioxide has interception and whitening effect.The component on preferred top layer comprises the titanium dioxide of 32-64%, the resin of 33-65% and the auxiliary agent of 2.2%-4.5% by surface quality percentage among the present invention.
Its middle level of three-layer co-extruded environmentally-friendly stone paper of the present invention is different with the top layer component, and therefore effect is not identical yet.The middle level has supporting role, and every physical-mechanical properties of environmentally-friendly stone paper is played a decisive role; The top layer then is mainly used in printing.Those skilled in the art can carry out suitable adjustment to the component on above-mentioned middle level and top layer according to the demand of the actual use of paper, make its every engineering properties meet demand, wherein layer component is preferably lacked velveteen, also can further add according to actual needs in addition the components such as calcium carbonate in the middle level.In addition, the thickness of this environmentally-friendly stone paper is 0.08-0.15mm, the thickness proportion in its top layer, middle level can be adjusted accordingly according to the requirement of printing condition, print request and sheet material physical and mechanical properties, the thickness in preferred middle level accounts for the 70%-90% of environmentally-friendly stone paper thickness among the present invention, the thickness on each top layer accounts for the 5%-15% of environmentally-friendly stone paper thickness, the thickness on top layer can be identical up and down, also can be adjusted into as required different-thickness.In one embodiment of the invention, the intima-media thickness of paper accounts for 90%, and the top layer respectively accounts for 5% up and down.
Resin in top layer of the present invention and the middle layer component can adopt polyethylene or polypropylene etc., and those skilled in the art can according to the actual requirement of paper manufacturing, select suitable resinous type.Preferably polyethylene in the present invention, in this polyethylene, high density polyethylene (HDPE) accounts for 55-65%, low density polyethylene (LDPE) accounts for 25-35%, linear low density polyethylene accounts for 5-15%, and in the further preferably polyethylene, high density polyethylene (HDPE) accounts for 60% in one embodiment of the invention, low density polyethylene (LDPE) accounts for 30%, and linear low density polyethylene accounts for 10%.
Auxiliary agent in top layer of the present invention and the middle layer component mainly comprises composite coupler, dispersant, fire retardant, compatilizer, slipping agent.Wherein, the composite coupler that use in the middle level is its title, do not refer to that multiple coupling agent mixes composition, its effect is to make the component such as short velveteen and resin realize good linking, those skilled in the art can be according to components such as the resin of reality use, short velveteens, select suitable composite coupler, OL-AT series aluminum titanium composite coupler for example, compound coupling agent also can share to increase link strength with silane coupler sometimes.When the extrusion calendaring of preparation process, middle level, top layer fluid are in molten condition, should have interior lubricated and outer lubrication property, namely between melt inside, melt and the metal good lubricated assurance should be arranged, therefore need to select good auxiliary agent, guarantee that it plays good lubrication.The effect of fire retardant is can be so that paper has possessed the fireproof function, and the present invention can select for example fire-retardant PP (this is title), effectively again environmental protection, and also available FZY series composite flame-proof smoke suppressant is as fire retardant.In addition, other auxiliary agents, for example, dispersant can be according to selected resin corresponding selection Tissuemat E or polypropylene wax (be polyethylene such as resin, dispersant Tissuemat E then.Polypropylene such as resin, dispersant polypropylene wax then), compatilizer can be selected available POE8100 type compatilizer or POE8210 type compatilizer, and slipping agent can be selected RH type lubricant.Preferred composite coupler accounts for 0.2-0.5% among the present invention, and dispersant accounts for 0.5-1%, and fire retardant accounts for 0.5-1%, and compatilizer accounts for 0.5-1%, and slipping agent accounts for 0.5-1%, respectively with the percentage calculation of middle level or surface quality.
The preparation method of three-layer co-extruded environmentally-friendly stone paper provided by the invention as shown in Figure 2, comprising: A is dried to moisture less than 2% with all components material, to guarantee carrying out smoothly of whole technological process.B adds middle layer material and skin-material respectively carry out mix and blend in the homogenizer under 100-110 ℃, order by merging is, middle layer material: staple fibre is stirred 3-5 minute first, add again auxiliary agent and stirred 3-5 minute, mix rear adding resin agitating 3-5 minute; Skin-material: titanium dioxide is stirred 3-5 minute first, reenter auxiliary agent and stirred 3-5 minute, mix rear adding resin agitating 3-5 minute.C obtains respectively top layer particle and middle level particle with mixed middle layer material and respectively granulation behind vacuum kneading of skin-material; D delivers to extruder with top layer particle and middle level particle, and as shown in Figure 3, heating is flowed out by die head in extruder, and calender rolls the thickness to needs, suitably processes the environmentally-friendly stone paper for preparing top layer-middle level-top layer three-decker by the winder rolling.
To lack velveteen as example, further be described as follows.
Among the preparation method of the present invention, short velveteen is about 110 ℃ of lower coupling agent and other auxiliary agents of adding in high speed agitator, the about 3-5 of stirring at low speed minute, add again resin, stirring at low speed 3-5 minute, realize that namely short velveteen links with the good of resin, both form one, have guaranteed the uniformity of environmentally-friendly stone paper performance.For guaranteeing to mix plasticizing effect, Improving The Quality of Products, the auxiliary agent in middle level adds and preferably adds first composite coupler, dispersant, adds fire retardant, compatilizer, slipping agent again, and behind a kind of composition of every adding through abundant mixing ratio as mix add again after one minute another kind of.
Simultaneously, in the preparation process of the present invention, after middle level, top layer particle are sent into the extruder of three-layer co-extruded five roll calendars, the resin in middle level, the titanium dioxide resin system on short velveteen and top layer must guarantee that its fluid rheology is functional.At this moment, the appraisal standards that the melt flowability on middle level, top layer is good are that melt flow rate (MFR) answers 〉=1, to keep the uniformity of its mobile performance.Melt flow rate (MFR) is to be determined by selected resin, prescription, technical process, and those skilled in the art can be according to actual conditions, takes suitable condition to control melt flow rate (MFR) well.Wherein the setting of each section of extrusion temperature temperature be about 90-110 ℃-＞220-240 ℃-＞100-120 ℃ about, preferred temperature is 100 ℃-＞240 ℃-＞110 ℃, the Temperature Setting of calender should be below the Vicat softening point of component, namely below 150 ℃, before rolling, can add the operations such as corona is processed, static is eliminated, online thickness non-contact measurement.
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.Following examples only are further detailed the present invention, should not be construed as limitation of the present invention.
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 57.5%, titanium dioxide 40%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 55%, short velveteen 42.5%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Wherein composite coupler is selected OL-AT series aluminum titanium composite coupler, dispersant is selected the Tissuemat E dispersant, fire retardant is selected FZY series composite flame-proof smoke suppressant, and compatilizer is selected wherein a kind of in POE8100 type compatilizer or the POE8210 type compatilizer, and slipping agent is selected RH type lubricant.
Concrete preparation process is as follows:
1. above component material is placed in the vacuum drying chamber, be dried to moisture less than 2%, take out stand-by.
2. will lack velveteen and titanium dioxide respectively at putting into homogenizer, design temperature is about 100-110 ℃, stirs 3-5 minute with low or first gear.
3. successively composite coupler, dispersant, fire retardant, compatilizer, slipping agent are added to respectively in the short velveteen and titanium dioxide that has heated, the interval was one minute between every kind of auxiliary agent added, to lack again velveteen mixture and titanium dioxide mixture and place respectively homogenizer, design temperature is 100-110 ℃, stirs 3-5 minute with top gear.
4. will lack respectively velveteen agent mixture and resin, titanium dioxide agent mixture and mixed with resin and stir, and deliver to vacuum kneader after the stirring fully and mediate, send into again granulator granulation, obtain respectively top layer particle and middle level particle.
5. top layer particle and middle level particle are delivered to extruder, the setting of each section of extrusion temperature temperature is about about 100 ℃-＞240 ℃-＞110 ℃, particle is melted into molten condition, after die head flows out, be pressed into the thickness that needs with stack, the Temperature Setting of calender is below 150 ℃, carries out the operations such as corona treatment, static elimination, online thickness non-contact measurement again, the rear rolling of finishing dealing with obtains product 1.
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 57.5%, titanium dioxide 40%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 67%, short velveteen 30.8%, composite coupler 0.2%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Its preparation process obtains product 2 with embodiment 1.
Embodiment 3
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 57.5%, titanium dioxide 40%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 45.5%, short velveteen 50%, composite coupler 0.5%, dispersant 1%, fire retardant 1%, compatilizer 1%, slipping agent 1%.
Its preparation process obtains product 3 with embodiment 1.
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 57.5%, titanium dioxide 40%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 47%, short velveteen 48.5%, composite coupler 0.5%, dispersant 1%, fire retardant 1%, compatilizer 1%, slipping agent 1%.
Its preparation process obtains product 4 with embodiment 1.
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 57.5%, titanium dioxide 40%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 66.7%, short velveteen 30%, composite coupler 0.3%, dispersant 0.75%, fire retardant 0.75%, compatilizer 0.75%, slipping agent 0.75%.
Its preparation process obtains product 5 with embodiment 1.
Embodiment 6
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 63.5%, titanium dioxide 32%, composite coupler 0.5%, dispersant 1%, fire retardant 1%, compatilizer 1%, slipping agent 1%.
Middle layer component (each component is in the middle level quality): polyethylene 55%, short velveteen 42.5%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Its preparation process obtains product 6 with embodiment 1.
Embodiment 7
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 33.8%, titanium dioxide 64%, composite coupler 0.2%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 55%, short velveteen 42.5%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Its preparation process obtains product 7 with embodiment 1.
Embodiment 8
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 65%, titanium dioxide 32.7%, composite coupler 0.3%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 55%, short velveteen 42.5%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Its preparation process obtains product 8 with embodiment 1.
Embodiment 9
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 33%, titanium dioxide 63.7%, composite coupler 0.3%, dispersant 0.75%, fire retardant 0.75%, compatilizer 0.75%, slipping agent 0.75%.
Middle layer component (each component is in the middle level quality): polyethylene 55%, short velveteen 42.5%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Its preparation process obtains product 9 with embodiment 1.
Embodiment 10
Prepare environmentally-friendly stone paper by following prescription.
Top layer component (each component is in surface quality): polyethylene 57.5%, titanium dioxide 40%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Middle layer component (each component is in the middle level quality): polyethylene 50%, short velveteen 35%, calcium carbonate 12.5%, composite coupler 0.5%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
Its preparation process obtains product 10 with embodiment 1 (in the step, calcium carbonate and short velveteen together being added).
The paper sheet thickness of the product 1-10 that more than makes is 0.12 ± 0.03mm, and its intima-media thickness accounts for 90% of paper sheet thickness, and skin depth respectively accounts for 5% of paper sheet thickness about it.
Comparative Examples
The said goods 1-10 and conventional P P (polypropylene) individual layer environmentally-friendly stone paper are carried out following contrast experiment with regard to index of correlation, and the result is shown in the table 1.
The index of correlation contrast of the novel environment friendly stone paper of table 1, the present invention's preparation and PP individual layer stone paper
Annotate: contrast and be PP individual layer stone paper, its prescription is (by mass percentage): PP (polypropylene homopolymer) 47.2%, calcium carbonate 50%, coupling agent 0.8%, dispersant 0.5%, fire retardant 0.5%, compatilizer 0.5%, slipping agent 0.5%.
By table 1 as can be known, the present invention prepares environmentally-friendly stone paper in the These parameters contrast, and more traditional stone paper proportion is low.Every physical and mechanical properties is good, and for example elongation at break is high, and yield tensile strength is high, and fracture tensile strength is high.Simultaneously, paper of the present invention is than the PP stone paper, and the percentage of size changing rate is low in stability experiment, i.e. good stability of the dimension.Form this aspect, because the environmentally-friendly stone paper proportion among the present invention is low, the paper number that the historical facts or anecdotes border produces is many than the PP stone paper, thereby has reduced the cost of unit paper.
Above content is the further description of the present invention being done in conjunction with concrete embodiment, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. environmentally-friendly stone paper, described environmentally-friendly stone paper comprises resin, it is characterized in that: also comprise staple fibre, described staple fibre is that fibre length is the fiber product of 10～15mm, and described environmentally-friendly stone paper contains or do not contain calcium carbonate.
2. a kind of environmentally-friendly stone paper according to claim 1, it is characterized in that: described staple fibre is cotton short fiber, and described resin is polyethylene or polypropylene, and is preferred, and described staple fibre is short velveteen, and described resin is polyethylene.
3. a kind of environmentally-friendly stone paper according to claim 1 and 2, it is characterized in that: in the described environmentally-friendly stone paper, the percentage by weight of staple fibre is 30～50%, and the percentage by weight of resin is 47-67%.
4. a kind of environmentally-friendly stone paper according to claim 3, it is characterized in that: described environmentally-friendly stone paper comprises that also percentage by weight is 2.2～4.5% auxiliary agent, and described auxiliary agent comprises composite coupler, dispersant, fire retardant, compatilizer or slipping agent.
5. novel environment friendly stone paper, comprise top layer and middle level, the composition in described middle level is identical with the composition of the described environmentally-friendly stone paper of claim 1～4 any one, and the composition on described top layer comprises the titanium dioxide of 32-64%, the resin of 33-65% and 2.2～4.5% auxiliary agent by surface quality percentage.
6. a kind of novel environment friendly stone paper according to claim 5, it is characterized in that: the resin in top layer and the middle level is polyethylene, and in the described polyethylene, high density polyethylene (HDPE) accounts for 55-65%, low density polyethylene (LDPE) accounts for 25-35%, and linear low density polyethylene accounts for 5-15%.
7. according to claim 5 or 6 described a kind of novel environment friendly stone paper, it is characterized in that: described environmentally-friendly stone paper is top layer-middle level-top layer three-decker, the middle level is sandwiched between two top layers, the thickness in described middle level accounts for the 70%-90% of environmentally-friendly stone paper gross thickness, and the thickness on described each top layer accounts for the 5%-15% of environmentally-friendly stone paper thickness.
8. the preparation method of the described novel environment friendly stone paper of any one in the claim 5～7, described method comprises:
A, all components material is dried to moisture less than 2%;
B, middle layer material and skin-material are carried out mix and blend under 100-110 ℃, order by merging is,
Middle layer material: in staple fibre, add auxiliary agent, mix rear adding resin;
Skin-material: in titanium dioxide, add auxiliary agent, mix rear adding resin;
C, mixed middle layer material and skin-material obtain top layer particle and middle level particle respectively through the vacuum kneading granulation;
D, top layer particle and middle level particle prepared the environmentally-friendly stone paper of top layer-middle level-top layer three-decker through three-layer co-extruded calendering.
9. preparation method according to claim 8, it is characterized in that, among the described step B, when adding the auxiliary agent mixing, the interpolation of auxiliary agent sequentially is to add successively composite coupler, dispersant, fire retardant, compatilizer, slipping agent, and adds another kind through abundant mixing behind a kind of composition of every adding again.
10. according to claim 8 or 9 described preparation methods, it is characterized in that, among the described step D, adopt three-layer co-extruded five roll calendars, each section of extrusion temperature Temperature Setting is 90-110 ℃, 220-240 ℃, 100-120 ℃ in the described extruder, and the calender Temperature Setting is less than 150 ℃.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN104119600A (en) * | 2014-07-18 | 2014-10-29 | 宋旭 | Method for preparing mineral-fiber-filled high-strength environment-friendly rich mineral paper |
| CN106515116A (en) * | 2016-11-26 | 2017-03-22 | 云南昆钢石头纸环保材料有限公司 | Seven-layer melt-coextrusion stone paper and preparation method therefor |
| CN106947136A (en) * | 2017-03-22 | 2017-07-14 | 汪家秀 | A kind of degradable rice-straw fibre doping is packed for stone paper and its preparation technology |
| CN107310122A (en) * | 2015-12-23 | 2017-11-03 | 黄如辛 | Buffering combination board is prepared using air pressure support one-shot forming |
| CN108193545A (en) * | 2017-12-25 | 2018-06-22 | 福建省大投科技有限公司 | A kind of wet method prepares the production system of staple fibre paper |
| CN108286206A (en) * | 2018-04-14 | 2018-07-17 | 福建省大投科技有限公司 | Stone fiber papermaking method |
| CN113981740A (en) * | 2021-11-22 | 2022-01-28 | 山东金泰恒盛新材料科技有限公司 | Composite stone paper and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014169448A1 (en) * | 2013-04-17 | 2014-10-23 | 香港格林天使科技有限公司 | Environmentally friendly stone paper and preparation method therefor |
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| CN106515116A (en) * | 2016-11-26 | 2017-03-22 | 云南昆钢石头纸环保材料有限公司 | Seven-layer melt-coextrusion stone paper and preparation method therefor |
| CN106947136A (en) * | 2017-03-22 | 2017-07-14 | 汪家秀 | A kind of degradable rice-straw fibre doping is packed for stone paper and its preparation technology |
| CN108193545A (en) * | 2017-12-25 | 2018-06-22 | 福建省大投科技有限公司 | A kind of wet method prepares the production system of staple fibre paper |
| CN108286206A (en) * | 2018-04-14 | 2018-07-17 | 福建省大投科技有限公司 | Stone fiber papermaking method |
| CN113981740A (en) * | 2021-11-22 | 2022-01-28 | 山东金泰恒盛新材料科技有限公司 | Composite stone paper and preparation method and application thereof |
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