WO2014169448A1 - Environmentally friendly stone paper and preparation method therefor - Google Patents

Environmentally friendly stone paper and preparation method therefor Download PDF

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Publication number
WO2014169448A1
WO2014169448A1 PCT/CN2013/074311 CN2013074311W WO2014169448A1 WO 2014169448 A1 WO2014169448 A1 WO 2014169448A1 CN 2013074311 W CN2013074311 W CN 2013074311W WO 2014169448 A1 WO2014169448 A1 WO 2014169448A1
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WO
WIPO (PCT)
Prior art keywords
stone paper
environmentally friendly
surface layer
base layer
friendly stone
Prior art date
Application number
PCT/CN2013/074311
Other languages
French (fr)
Chinese (zh)
Inventor
王德成
姚丹
刘俊豪
夏开邦
Original Assignee
香港格林天使科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 香港格林天使科技有限公司 filed Critical 香港格林天使科技有限公司
Priority to PCT/CN2013/074311 priority Critical patent/WO2014169448A1/en
Publication of WO2014169448A1 publication Critical patent/WO2014169448A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/35—Polyalkenes, e.g. polystyrene
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/34—Ignifugeants

Definitions

  • the invention relates to the field of papermaking, in particular to environmentally friendly stone paper and a preparation method thereof.
  • Paper is one of the four major inventions in China.
  • the main raw material of traditional paper is wood. Its production is largely divided into two basic processes: pulping and papermaking. Pulping is the disintegration of raw materials into natural pulp or bleached pulp. In papermaking, pulp fibers suspended in water are processed into various papers to meet the requirements. At present, with the introduction of national forest protection policies, papermaking materials are mainly maintained by imported wood pulp. At the same time, due to the large amount of wastewater generated in the traditional paper production process, the environment is seriously polluted, the treatment is extremely difficult, and the traditional paper is not resistant to moisture, corrosion, dimensional stability and various physical and mechanical energy, which cannot meet the special requirements of many paper fields. Requirements, therefore, the development of paper production requires innovation.
  • environmentally friendly synthetic papers were produced using plastics, calcium carbonate and various additives as raw materials by blown film casting and casting.
  • the environmentally-friendly synthetic paper is characterized in that its physical and mechanical properties are superior to those of conventional paper, and it has the characteristics of moisture resistance, water resistance, dimensional stability, etc., thus meeting various requirements in different fields, and replacing traditional paper in some fields.
  • the new environmentally friendly synthetic paper, stone paper, has appeared in this revolution.
  • the existing stone paper is characterized in that it is mainly composed of a resin and calcium carbonate.
  • it is necessary to increase the proportion of calcium carbonate in the stone paper, thereby reducing the amount of the resin, thereby reducing the cost.
  • the problem that comes with it is that as the proportion of calcium carbonate increases, its functional function gradually decreases, and the physical and mechanical energy of the prepared stone paper decreases, resulting in a decrease in the quality of the stone paper.
  • the proportion of calcium carbonate is increased to reduce the proportion of the resin, the specific gravity of the prepared stone paper is increased, which in turn causes a reduction in the amount of paper actually produced, thereby compressing the actual space for cost reduction.
  • an environmentally friendly stone paper comprising a resin and a short fiber, wherein the short fiber is a fiber product having a fiber length of 10 to 15 mm is provided.
  • the environmentally friendly stone paper may or may not contain calcium carbonate depending on the demand for rigidity or the like in actual use of the paper.
  • the short fibers may be cotton staple fibers
  • the resin may be polyethylene or polypropylene.
  • the short fibers are preferably short cotton linters, and the resin is preferably polyethylene.
  • the weight percentage of the short fibers is preferably 30 to 50%, and preferably the weight percentage of the resin is 47 to 67%.
  • the above environmentally friendly stone paper further includes an auxiliary agent having a weight percentage of 2.2 to 4.5%, and the auxiliary agent includes a composite coupling agent, a flame retardant, a compatibilizer or a slip agent.
  • the composite coupling agent accounts for 0.2-0.5%
  • the flame retardant accounts for 0.5-1%
  • the compatibilizer accounts for 0.5-1%
  • the slip agent accounts for 0.5-2%.
  • a three-layer co-extruded environmentally friendly stone paper comprising a skin layer and a base layer, the components of the base layer comprising short fibers, a resin and an auxiliary agent; and the surface layer component comprising titanium dioxide, resin and auxiliary Agent.
  • composition of the environmentally friendly stone paper base layer preferably comprises 30-50% of short fibers, 47-67% of resin, and 2.2% to 4.5% of auxiliary agent, based on the mass percentage of the base layer.
  • composition of the eco-friendly stone paper surface layer preferably comprises 32-64% titanium dioxide, 33-65% resin and 2.2%-4.5% auxiliary agent in terms of surface layer percentage.
  • the short fibers may be cotton staple fibers
  • the resin may be polyethylene or polypropylene.
  • the short fibers are preferably short cotton linters
  • the resin is preferably polyethylene.
  • high density polyethylene accounts for 55-65%
  • low density polyethylene accounts for 25-35%
  • linear low density polyethylene accounts for 5-15%.
  • auxiliary agents include a composite coupling agent, a flame retardant, a compatibilizer or a slip agent. Further preferably, the composite coupling agent accounts for 0.2-0.5%, the flame retardant accounts for 0.5-1%, the compatibilizer accounts for 0.5-1%, and the slip agent accounts for 0.5-2%, which are respectively calculated as the percentage of the base layer or the surface layer mass. .
  • the components of the above base layer may further include calcium carbonate.
  • the three-layer co-extruded green stone paper structure is a surface layer-base layer-surface layer, and the base layer is sandwiched between two surface layers, and the paper thickness thereof may be 0.08-0.15 mm, and the thickness of the base layer and the surface layer may be adjusted according to actual needs, preferably the base layer.
  • the thickness accounts for 70%-90% of the total thickness of the environmentally friendly stone paper, and the thickness of each surface layer accounts for 5%-15% of the total thickness of the environmentally friendly stone paper.
  • a method for preparing a three-layer co-extruded environmentally friendly stone paper comprising:
  • the components are dried to a water content of less than 2%, and the components and ratios can be referred to the above description;
  • Base layer Adding an auxiliary agent to the short fiber, adding the resin after mixing;
  • the components of the mixed base layer and the components of the surface layer are respectively granulated by vacuum kneading to obtain surface layer particles and base layer particles;
  • the three layers of the surface layer and the base layer are co-extruded to prepare an environmentally friendly stone paper having a surface layer-base layer-surface layer three-layer structure.
  • step B when the auxiliary agent is added, the order of adding the auxiliary agent is to sequentially add a composite coupling agent, a flame retardant, a compatibilizer, a slip agent, and after each component is added, the mixture is thoroughly mixed and then added to another kind.
  • a three-layer co-extrusion five-roll calender which comprises an extruder part and a calender part, and the extrusion temperature of each section in the extruder is set to 90-110 ° C, 220-240 ° C, 100-120 °C, calender temperature setting is less than 150 °C.
  • the beneficial effects of the present invention are: 1.
  • the proportion of environmentally friendly stone paper can be reduced, physical and mechanical properties such as rigidity, stiffness, flexibility, etc. are improved, tear strength is greatly enhanced, and dimensional stability of environmentally friendly stone paper is also more stable. good.
  • the base layer plays a supporting role and plays a decisive role in the improvement of various physical and mechanical properties of environmentally friendly stone paper;
  • the surface layer is smooth, has a certain hardness, and has high wetting tension, good coloring performance, and is favorable for printing, the environmentally friendly stone paper of the invention It is especially suitable for applications requiring high physical and mechanical properties and small dimensional deformation, such as maps, charts, petroleum, geology, earthquake disaster maps, and national land mapping.
  • Figure 1 is a structural view of a novel environmentally-friendly stone paper of the present invention, wherein 1 represents a base layer and 2 represents a surface layer;
  • Fig. 3 is a schematic view showing the calendering process in the preparation step of a novel environmentally-friendly stone paper of the present invention, wherein 3 denotes an extruder, 4 denotes a die, 5 denotes a calender, and 6 denotes a winder.
  • the invention replaces the main component of the conventional stone paper of the prior art with short fiber as the main component, and the prepared paper has the basic performance of the traditional stone paper compared with the traditional stone paper.
  • the characteristics are also optimized to various degrees in various performances. Therefore, the present invention discloses a novel environmentally-friendly stone paper.
  • the short fibers in the present invention are fiber products having a fiber length of 10 to 15 mm, and cotton short fibers, short glass fibers, and the like can be used, and short cotton linters are preferably used.
  • the short cotton linter used in the present invention refers to a short fiber remaining on the cotton seed after the cotton seed is rolled, and is a short cotton fiber which cannot be woven.
  • the invention further provides a three-layer co-extruded environmental protection stone paper comprising a surface layer and a base layer, the structure of which is shown in FIG. 1 : a three-layer structure of a surface layer-base layer-surface layer.
  • the components of the base layer mainly include short fibers, resins and auxiliary agents.
  • the composition of the base layer comprises 30-50% of short fibers, 47-67% of resin, and 2.2% to 4.5% of auxiliary agent in terms of the mass percentage of the base layer.
  • Table The components of the layer include titanium dioxide, a resin and an auxiliary agent, wherein the titanium dioxide has a light blocking effect and a whitening effect.
  • the surface layer component of the present invention comprises 32-64% titanium dioxide, 33-65% resin, and 2.2%-4.5% auxiliary agent in terms of surface layer percentage.
  • the three-layer co-extruded environmentally friendly stone paper of the present invention has different base layers and surface layers, and therefore has different effects.
  • the base layer has a supporting effect, which plays a decisive role in the physical and mechanical properties of environmentally friendly stone paper; the surface layer is mainly used for printing.
  • the base layer components are preferably short cotton linters, and can also be at the base layer according to actual needs. Further, components such as calcium carbonate are added.
  • the thickness of the environmentally-friendly stone paper is 0.08-0.15 mm, and the thickness ratio of the surface layer and the base layer can be adjusted according to the printing conditions, the printing requirements, and the physical and mechanical properties of the sheet.
  • the thickness of the base layer is preferably environmentally friendly. 70%-90% of the thickness of the stone paper, the thickness of each surface layer accounts for 5%-15% of the thickness of the environmentally-friendly stone paper, the thickness of the upper surface layer can be the same, or can be adjusted to different thicknesses as needed.
  • the base layer thickness of the paper is 90% and the upper and lower layers each account for 5%.
  • the resin in the surface layer and the base layer component of the present invention may be polyethylene or polypropylene or the like, and those skilled in the art may select a suitable resin type according to the actual requirements of paper manufacture.
  • Polyethylene is preferred in the present invention, wherein the high density polyethylene accounts for 55-65%, the low density polyethylene accounts for 25-35%, and the linear low density polyethylene accounts for 5-15%, in accordance with the present invention. Further preferably, in the embodiment, in the polyethylene, the high density polyethylene accounts for 60%, the low density polyethylene accounts for 30%, and the linear low density polyethylene accounts for 10%.
  • the auxiliaries in the surface layer and the base layer component of the present invention mainly include a composite coupling agent, a flame retardant, a compatibilizer (also referred to as a compatibilizer), and a slip agent (also referred to as a dispersant).
  • the composite coupling agent used in the base layer is the name thereof, and does not mean that it is composed of a mixture of a plurality of coupling agents, and the function thereof is to achieve a good linkage between the components such as short cotton linters and the resin, and those skilled in the art can
  • the resin, short cotton linter and other components used, and a suitable composite coupling agent, such as OL-AT series aluminum-titanium composite coupling agent, may be selected.
  • the composite coupling agent may also be shared with the silane coupling agent.
  • the silane coupling agent may also be shared with the silane coupling agent.
  • the extrusion pressure is delayed, and the components used for preparing the base layer and the surface layer are in a molten state in a fluid form, and should have internal lubrication and external lubrication properties, that is, there should be good lubrication between the inside of the melt, between the melt and the metal. Guaranteed, therefore, it is necessary to choose a good slip agent as an auxiliary agent to ensure good lubrication.
  • RH type lubricant can be used as a slip agent, or WP type polypropylene wax or WE type polyethylene wax can be selected.
  • the function of the flame retardant is to make the paper have the function of fire prevention.
  • the flame retardant PP (this name) can be selected, which is effective and environmentally friendly, and the FZY series composite flame retardant and smoke suppressant can also be used as the flame retardant.
  • the auxiliary agent may be selected according to the selected resin.
  • the slip agent may be selected from polyethylene wax or polypropylene wax according to the resin selected (for example, the resin is polyethylene, and the smoothing agent is polyethylene wax; If the resin is polypropylene, the smoothing agent is made of polypropylene wax.
  • the compatibilizer can be selected from POE8100 type compatibilizer or POE8210 type compatibilizer.
  • the composite coupling agent is preferably 0.2-0.5%, which is resistant.
  • the flammable agent accounts for 0.5-1%
  • the compatibilizer accounts for 0.5-1%
  • the slip agent accounts for 0.5-2%, which are calculated as the percentage of the base layer or the surface layer respectively.
  • a method for preparing a three-layer co-extruded environmentally friendly stone paper according to an embodiment of the present invention, as shown in FIG. 2, includes: Step A, drying all components to a water content of less than 2% to ensure smooth process flow get on.
  • Step B the components of the base layer and the components of the surface layer are respectively added to a high-speed mixer and mixed and stirred at 100-110 ° C, the mixing sequence is, the base layer: firstly stir the short fibers for 3-5 minutes, then add the auxiliary stirring. After mixing for 3-5 minutes, add the resin and stir for 3-5 minutes.
  • Surface layer Stir the titanium dioxide for 3-5 minutes, then add the auxiliary agent for 3-5 minutes. Mix the mixture and add the resin for 3-5 minutes.
  • step C the components of the mixed base layer and the components of the surface layer are respectively subjected to vacuum kneading and then granulated to obtain surface layer particles and base layer particles, respectively.
  • step D the surface layer particles and the base layer particles are sent to an extruder, as shown in FIG. 3, heated in an extruder, flowed out through the die, and then calendered to a desired thickness by a calender, and appropriately processed and then passed through a winder.
  • the paper was prepared to obtain an environmentally friendly stone paper having a surface layer-base layer-surface three-layer structure.
  • the short lint is added to the coupling agent and other auxiliary agents at about 110 ° C in a high-speed stirrer, stirred at a low speed for about 3-5 minutes, and then added with a resin, low-speed stirring 3 - 5 minutes, that is, a good link between the short cotton linters and the resin, and the two are integrated to ensure the consistency of the performance of the environmentally friendly stone paper.
  • the order of adding the auxiliary agent of the base layer is preferably firstly added with a composite coupling agent, then adding a flame retardant, a compatibilizer, a slip agent, and sufficient after each auxiliary agent is added. Mix, such as mixing for one minute before adding another.
  • the resin of the base layer, the short lint system and the surface layer of the titanium dioxide and the resin system are required to ensure the rheology of the fluid. Good performance.
  • the evaluation criteria for good melt flow properties of the base layer and the surface layer are that the melt flow rate should be > 1 to maintain the consistency of the flow properties.
  • the melt flow rate is determined by the choice of resin, formulation, process, and those skilled in the art will be able to control the melt flow rate under appropriate conditions.
  • the temperature of each section during extrusion is set to be about 90-110 °C ->220-240 °C ->100-120 °C, preferably 100 °C ->240 °C ->110 °C
  • the temperature setting of the calender should be below the Vicat softening point of the component, that is, below 150 °C.
  • the polyethylene used was a commercially available Saudi HTA-001HD polyethylene, and the titanium dioxide used was R960 titanium dioxide of DuPont, USA.
  • the composite coupling agent used was 27 of Shenzhen Superior Changhao Technology Co., Ltd. # ⁇
  • the slip agent used is 8 ⁇ -108# slip agent of Shanghai Songya Chemical Co., Ltd.
  • the flame retardant used is the inorganic flame retardant of Guangzhou Jiazhuo Trading Co., Ltd.
  • the compatibilizer used is the WP-11 increase of Shanghai Jinshan Star Plastic Co., Ltd.
  • the short cotton linters used are the short cotton linters of Henan Kaifeng Cotton Production Co., Ltd.
  • the calcium carbonate used is Nanjing Omega calcium carbonate.
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base component weight percent of each component based on base mass: 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
  • the specific preparation process is as follows:
  • the surface particles and the base particles are sent to the extruder, and the temperature of each section during extrusion is set to about 100 ° C -> 240 ° C -> 110 ° C, the particles are melted into a molten state, through the die After flowing out, it is pressed to a desired thickness by a calender roll, and the temperature of the calender is set to 150 ° C or less, and then corona treatment, static elimination, on-line thickness non-contact measurement, and the like are completed, and the product is wound up to obtain a product. 1.
  • Example 2 Example 2
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base layer components (weight percent of each component based on the mass of the base layer): polyethylene 67%, short cotton linter 30.8%, composite coupling agent 0.2%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1% .
  • Example 3 Prepare environmentally friendly stone paper according to the following formula.
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base layer components (weight percent of each component based on the mass of the base layer): 45.5% polyethylene, 50% short cotton, 0.5% composite coupling, 1% flame retardant, 1% compatibilizer, 2% slip agent .
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base layer components (weight percent of each component based on the mass of the base layer): 47% polyethylene, 48.5% short cotton, 0.5% composite coupling, 1% flame retardant, 1% compatibilizer, 2% slip agent .
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base layer components weight percent of each component in terms of base layer mass: 66.7% polyethylene, 30% short cotton, 0.3% composite coupling, 0.75% flame retardant, 0.75% compatibilizer, 1.5% slip agent .
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 63.5%, titanium dioxide 32%, composite coupling agent 0.5%, flame retardant 1%, compatibilizer 1%, slip agent 2%.
  • Base component weight percent of each component based on base mass: 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
  • the surface layer components (the weight percentage of each component is based on the surface layer): polyethylene 33.8%, titanium dioxide 64%, composite coupling agent 0.2%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base component weight percent of each component based on base mass: 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
  • the preparation procedure was the same as in Example 1 to obtain the product 7.
  • composition (the weight percentage of each component is based on the surface quality): polyethylene 65%, titanium dioxide 32.7%, composite coupling agent 0.3%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base component weight percent of each component based on base mass: 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
  • composition (the weight percentage of each component is based on the surface quality): polyethylene 33%, titanium dioxide 63.7%, composite coupling agent 0.3%, flame retardant 0.75%, compatibilizer 0.75%, slip agent 1.5%.
  • Base component weight percent of each component based on base mass: 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
  • the surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
  • Base layer components 50% polyethylene, 35% short cotton, 12.5% calcium carbonate, 0.5% composite coupling agent, 0.5% flame retardant, 0.5% compatibilizer, Slip agent 1%.
  • the above-mentioned products 1-10 have a paper thickness of 0.12 ⁇ 0.03 mm, a base layer thickness of 90% of the paper thickness, and an upper surface layer thickness of 5% of the paper thickness. Comparative example
  • control is PP single-layer stone paper, the formula is (by mass percentage): PP (polypropylene homopolymer) 47.2%, calcium carbonate 50%, coupling agent 0.8%, flame retardant 0.5%, compatibilization 0.5% agent, 1% slip agent.
  • the environmentally friendly stone paper prepared according to the present invention has a lower specific gravity than the conventional stone paper in the comparison of the above indexes, and has various physical and mechanical properties, such as high elongation at break, high tensile strength at yield, tensile strength at break. high. Meanwhile, the stone paper according to the present invention has a lower percentage of the dimensional change rate in the stability test than the PP stone paper, that is, the dimensional stability is good. On the cost side, since the environmentally-friendly stone paper according to the present invention has a low specific gravity, the actual number of sheets produced is larger than that of PP stone paper, thereby reducing the cost per unit paper.
  • the above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the above specific embodiments may be modified according to the idea of the present invention.

Abstract

Disclosed are environmentally friendly stone paper and a preparation method therefor. Components of the environmentally friendly stone paper comprise a resin and a short fiber. The short fiber is a fiber product with a fiber length ranging from 10 mm to 15 mm. Because the short fiber replaces calcium carbonate, a main component in the conventional stone paper, the proportion of the stone paper is reduced, and physical mechanical performances are improved, thereby providing wide application values.

Description

环保石头纸及其制备方法 技术领域  Environmentally friendly stone paper and preparation method thereof
本发明涉及造纸领域， 特别是涉及环保石头纸及其制备方法。  The invention relates to the field of papermaking, in particular to environmentally friendly stone paper and a preparation method thereof.
背景技术 Background technique
纸张是中国四大发明之一， 传统纸的主要原料是木材等， 其生产大 致分为制浆和造纸两个基本过程。 制浆就是把原料离解变成本色纸浆或 漂白纸浆。 造纸则是把悬浮在水中的纸浆纤维， 经过各种加工制成合乎 要求的纸张。 目前， 随着国家森林保护政策的出台， 造纸原料主要依靠 进口木浆维持。 同时， 由于传统纸生产过程中会产生大量废水， 严重污 染环境， 治理难度极大， 且传统纸不耐潮湿， 腐蚀， 尺寸稳定性和各项 物理机械能差， 已不能满足许多用纸领域的特殊要求， 因此， 纸张生产 研制需要创新。  Paper is one of the four major inventions in China. The main raw material of traditional paper is wood. Its production is largely divided into two basic processes: pulping and papermaking. Pulping is the disintegration of raw materials into natural pulp or bleached pulp. In papermaking, pulp fibers suspended in water are processed into various papers to meet the requirements. At present, with the introduction of national forest protection policies, papermaking materials are mainly maintained by imported wood pulp. At the same time, due to the large amount of wastewater generated in the traditional paper production process, the environment is seriously polluted, the treatment is extremely difficult, and the traditional paper is not resistant to moisture, corrosion, dimensional stability and various physical and mechanical energy, which cannot meet the special requirements of many paper fields. Requirements, therefore, the development of paper production requires innovation.
上世纪五十年代， 出现了以塑料、 碳酸钙及多种助剂为原料， 用吹 膜法、 流延法生产的环保合成纸。 该环保合成纸的特点是各项物理机械 性能优于传统纸， 且具有耐潮湿， 防水， 尺寸稳定性好等特性， 因此满 足了不同领域的多种要求， 在部分领域取代了传统纸， 是造纸工业的一 次改革。 新型的环保合成纸——石头纸， 即出现在此变革中。  In the 1950s, environmentally friendly synthetic papers were produced using plastics, calcium carbonate and various additives as raw materials by blown film casting and casting. The environmentally-friendly synthetic paper is characterized in that its physical and mechanical properties are superior to those of conventional paper, and it has the characteristics of moisture resistance, water resistance, dimensional stability, etc., thus meeting various requirements in different fields, and replacing traditional paper in some fields. A reform of the paper industry. The new environmentally friendly synthetic paper, stone paper, has appeared in this revolution.
现有石头纸的特点是， 其主要由树脂和碳酸钙组成。 为降低石头纸 的成本， 则需要增加石头纸中碳酸钙的比例， 以此降低树脂的用量， 从 而使成本下降。 但随之而来的问题是， 随着碳酸钙比例增加， 其功能性 作用逐渐减退， 制备得到的石头纸各项物理机械能随之下降， 导致了石 头纸品质的降低。 另一方面， 虽然碳酸钙比例增加而减少了树脂的比例， 但制备得到的石头纸比重却因此而增加了， 反而造成实际生产的纸张数 量减少， 从而压缩了成本降低的实际空间。  The existing stone paper is characterized in that it is mainly composed of a resin and calcium carbonate. In order to reduce the cost of stone paper, it is necessary to increase the proportion of calcium carbonate in the stone paper, thereby reducing the amount of the resin, thereby reducing the cost. However, the problem that comes with it is that as the proportion of calcium carbonate increases, its functional function gradually decreases, and the physical and mechanical energy of the prepared stone paper decreases, resulting in a decrease in the quality of the stone paper. On the other hand, although the proportion of calcium carbonate is increased to reduce the proportion of the resin, the specific gravity of the prepared stone paper is increased, which in turn causes a reduction in the amount of paper actually produced, thereby compressing the actual space for cost reduction.
发明内容 Summary of the invention
依据本发明的一方面提供一种环保石头纸， 其组分包括树脂和短纤 维， 其中短纤维是纤维长度为 10~15mm 的纤维产品。 该环保石头纸中 可根据纸张在实际使用中对刚性等的需求含有或不含有碳酸钙。  According to an aspect of the present invention, an environmentally friendly stone paper comprising a resin and a short fiber, wherein the short fiber is a fiber product having a fiber length of 10 to 15 mm is provided. The environmentally friendly stone paper may or may not contain calcium carbonate depending on the demand for rigidity or the like in actual use of the paper.
本发明中， 短纤维可为棉短纤维， 树脂可为聚乙烯或聚丙烯。  In the present invention, the short fibers may be cotton staple fibers, and the resin may be polyethylene or polypropylene.
进一步， 短纤维优选为短棉绒， 树脂优选聚乙烯。  Further, the short fibers are preferably short cotton linters, and the resin is preferably polyethylene.
其中， 优选短纤维的重量百分比为 30~50%, 优选树脂的重量百分 比为 47~67%。  Among them, the weight percentage of the short fibers is preferably 30 to 50%, and preferably the weight percentage of the resin is 47 to 67%.
上述环保石头纸中还包括重量百分比为 2.2~4.5%的助剂， 所述助剂 包括复合偶联剂、 阻燃剂、 增容剂或爽滑剂。  The above environmentally friendly stone paper further includes an auxiliary agent having a weight percentage of 2.2 to 4.5%, and the auxiliary agent includes a composite coupling agent, a flame retardant, a compatibilizer or a slip agent.
进一步优选， 复合偶联剂占 0.2-0.5%, 阻燃剂占 0.5-1%, 增容剂占 0.5-1%, 爽滑剂占 0.5-2%。 依据本发明的另一方面还提供一种三层共挤环保石头纸， 其包括表 层和基层， 其基层的组分包括短纤维、 树脂及助剂； 其表层的组分包括 二氧化钛、 树脂和助剂。 Further preferably, the composite coupling agent accounts for 0.2-0.5%, the flame retardant accounts for 0.5-1%, the compatibilizer accounts for 0.5-1%, and the slip agent accounts for 0.5-2%. According to another aspect of the present invention, there is also provided a three-layer co-extruded environmentally friendly stone paper comprising a skin layer and a base layer, the components of the base layer comprising short fibers, a resin and an auxiliary agent; and the surface layer component comprising titanium dioxide, resin and auxiliary Agent.
该环保石头纸基层的组分按基层质量百分比计优选包括 30-50%的 短纤维、 47-67%的树脂以及 2.2%-4.5%的助剂。  The composition of the environmentally friendly stone paper base layer preferably comprises 30-50% of short fibers, 47-67% of resin, and 2.2% to 4.5% of auxiliary agent, based on the mass percentage of the base layer.
该环保石头纸表层的组分按表层质量百分比计优选包括 32-64%的 二氧化钛、 33-65%的树脂以及 2.2%-4.5%的助剂。  The composition of the eco-friendly stone paper surface layer preferably comprises 32-64% titanium dioxide, 33-65% resin and 2.2%-4.5% auxiliary agent in terms of surface layer percentage.
本发明中， 短纤维可为棉短纤维， 树脂可为聚乙烯或聚丙烯。  In the present invention, the short fibers may be cotton staple fibers, and the resin may be polyethylene or polypropylene.
进一步的， 上述表层和基层的组分中， 短纤维优选短棉绒， 树脂优 选聚乙烯， 该聚乙烯中， 高密度聚乙烯占 55-65% , 低密度聚乙烯占 25-35%, 线性低密度聚乙烯占 5-15%。  Further, among the components of the surface layer and the base layer, the short fibers are preferably short cotton linters, and the resin is preferably polyethylene. Among the polyethylenes, high density polyethylene accounts for 55-65%, and low density polyethylene accounts for 25-35%, linear. Low density polyethylene accounts for 5-15%.
上述助剂包括复合偶联剂、 阻燃剂、 增容剂或爽滑剂。 进一步优选， 复合偶联剂占 0.2-0.5%, 阻燃剂占 0.5-1%, 增容剂占 0.5-1%, 爽滑剂占 0.5-2%, 均分别以基层或表层质量的百分比计算。  The above auxiliary agents include a composite coupling agent, a flame retardant, a compatibilizer or a slip agent. Further preferably, the composite coupling agent accounts for 0.2-0.5%, the flame retardant accounts for 0.5-1%, the compatibilizer accounts for 0.5-1%, and the slip agent accounts for 0.5-2%, which are respectively calculated as the percentage of the base layer or the surface layer mass. .
上述基层的组分还可进一步包括碳酸钙。  The components of the above base layer may further include calcium carbonate.
该三层共挤环保石头纸结构为表层-基层-表层， 基层夹于两个表层 之间， 其纸张厚度可以为 0.08-0.15mm, 基层和表层的厚度则可根据实 际需要进行调整， 优选基层的厚度占环保石头纸总厚度的 70%-90%, 每 一表层的厚度占环保石头纸总厚度的 5%-15%。  The three-layer co-extruded green stone paper structure is a surface layer-base layer-surface layer, and the base layer is sandwiched between two surface layers, and the paper thickness thereof may be 0.08-0.15 mm, and the thickness of the base layer and the surface layer may be adjusted according to actual needs, preferably the base layer. The thickness accounts for 70%-90% of the total thickness of the environmentally friendly stone paper, and the thickness of each surface layer accounts for 5%-15% of the total thickness of the environmentally friendly stone paper.
依据本发明的再一方面还提供三层共挤环保石头纸的制备方法， 该 方法包括：  According to still another aspect of the present invention, a method for preparing a three-layer co-extruded environmentally friendly stone paper is provided, the method comprising:
A. 将各组分干燥至含水量小于 2%, 组分及配比可参照上述描述； A. The components are dried to a water content of less than 2%, and the components and ratios can be referred to the above description;
B. 将基层的组分和表层的组分分别于 100-110 °C下进行混合搅拌， 混合顺序为， B. Mixing the components of the base layer and the components of the surface layer at 100-110 ° C, respectively, in the order of mixing,
基层： 在短纤维中加入助剂， 混合均勾后加入树脂；  Base layer: Adding an auxiliary agent to the short fiber, adding the resin after mixing;
表层： 在二氧化钛中加入助剂， 混合均勾后加入树脂；  Surface layer: Adding an auxiliary agent to the titanium dioxide, mixing and adding the resin;
C. 混合后的基层的组分和表层的组分分别经真空捏合后造粒，得到 表层粒子和基层粒子；  C. The components of the mixed base layer and the components of the surface layer are respectively granulated by vacuum kneading to obtain surface layer particles and base layer particles;
D. 将表层粒子和基层粒子三层共挤压延， 制备得到表层 -基层 -表层 三层结构的环保石头纸。  D. The three layers of the surface layer and the base layer are co-extruded to prepare an environmentally friendly stone paper having a surface layer-base layer-surface layer three-layer structure.
上述步骤 B中， 加入助剂混合时， 助剂的添加顺序是依次加入复合 偶联剂、 阻燃剂、 增容剂、 爽滑剂， 且每加入一种成分后经过充分混合 再加入另一种。  In the above step B, when the auxiliary agent is added, the order of adding the auxiliary agent is to sequentially add a composite coupling agent, a flame retardant, a compatibilizer, a slip agent, and after each component is added, the mixture is thoroughly mixed and then added to another Kind.
上述步骤 D中， 釆用三层共挤五辊压延机， 其包括挤压机部分和压 延机部分， 挤压机中各段的挤出温度设定为 90-110 °C、 220-240 °C、 100-120 °C , 压延机温度设定小于 150 °C。  In the above step D, a three-layer co-extrusion five-roll calender is used, which comprises an extruder part and a calender part, and the extrusion temperature of each section in the extruder is set to 90-110 ° C, 220-240 ° C, 100-120 °C, calender temperature setting is less than 150 °C.
由于釆用以上技术方案， 本发明的有益效果在于： 1. 通过将短纤维引入环保石头纸之后， 能够使得环保石头纸的比重 降低， 刚性、 挺度、 柔韧性等物理机械性能提高， 抗撕裂强度大大加强， 环保石头纸的尺寸稳定性也更加良好。 Since the above technical solutions are used, the beneficial effects of the present invention are: 1. By introducing short fibers into environmentally friendly stone paper, the proportion of environmentally friendly stone paper can be reduced, physical and mechanical properties such as rigidity, stiffness, flexibility, etc. are improved, tear strength is greatly enhanced, and dimensional stability of environmentally friendly stone paper is also more stable. good.
2. 短纤维在环保石头纸中部分或全部取代碳酸钙可以大大降低环 保石头纸的比重， 从而减少树脂的用量， 使得产品成本降低， 因此该种 新型环保石头纸有更高的经济效益。  2. The partial or complete replacement of calcium carbonate by short fibers in environmentally friendly stone paper can greatly reduce the proportion of environmentally friendly stone paper, thereby reducing the amount of resin and reducing the cost of the product. Therefore, the new environmentally friendly stone paper has higher economic benefits.
3. 釆用表层 -基层 -表层的三层结构， 其基层和表层组分不同， 各自 发挥不同作用。 基层起到支撑作用， 对环保石头纸的各项物理机械性质 的提升起决定作用； 表层光洁， 具有一定的硬度， 且润湿张力高， 着色 性能好， 有利于印刷， 本发明的环保石头纸特别适用于要求其物理机械 性能高、 尺寸变形性小的领域， 如地图， 海图， 石油、 地质、 地震灾害 图、 国土测绘图等方面的应用。  3. Use the surface layer - the base layer - the three-layer structure of the surface layer, the base layer and the surface layer components are different, each playing a different role. The base layer plays a supporting role and plays a decisive role in the improvement of various physical and mechanical properties of environmentally friendly stone paper; the surface layer is smooth, has a certain hardness, and has high wetting tension, good coloring performance, and is favorable for printing, the environmentally friendly stone paper of the invention It is especially suitable for applications requiring high physical and mechanical properties and small dimensional deformation, such as maps, charts, petroleum, geology, earthquake disaster maps, and national land mapping.
附图说明 DRAWINGS
图 1是本发明的一种新型环保石头纸的结构图， 图中 1表示基层， 2 表示表层；  Figure 1 is a structural view of a novel environmentally-friendly stone paper of the present invention, wherein 1 represents a base layer and 2 represents a surface layer;
图 2是本发明的一种新型环保石头纸的制备流程图；  2 is a flow chart of preparation of a novel environmentally-friendly stone paper of the present invention;
图 3 是本发明的一种新型环保石头纸的制备步骤中压延过程示意 图， 图中 3表示挤压机， 4表示模头， 5表示压延机， 6表示收卷机。 具体实施方式  Fig. 3 is a schematic view showing the calendering process in the preparation step of a novel environmentally-friendly stone paper of the present invention, wherein 3 denotes an extruder, 4 denotes a die, 5 denotes a calender, and 6 denotes a winder. detailed description
不同于传统石头纸， 本发明以短纤维作为主要组分代替了现有技术 中传统石头纸的主要成分碳酸钙， 制备得到的纸张与传统石头纸的性能 相比， 不仅具备传统石头纸的基本特性， 还在各项性能上均有不同程度 的优化提高， 因此， 本发明公开的是一种新型环保石头纸。  Different from the traditional stone paper, the invention replaces the main component of the conventional stone paper of the prior art with short fiber as the main component, and the prepared paper has the basic performance of the traditional stone paper compared with the traditional stone paper. The characteristics are also optimized to various degrees in various performances. Therefore, the present invention discloses a novel environmentally-friendly stone paper.
本发明中的短纤维是纤维长度为 10~15mm 的纤维产品， 可以选用 棉短纤维， 短玻璃纤维等， 其中优选使用短棉绒。 本发明使用的短棉绒 是指棉籽轧制后留在棉籽上残存的短纤维， 是不能纺织的短棉花纤维。 将其引入环保石头纸之后， 使得环保石头纸的品质产生一系列的变化， 其突出的有益效果是使环保石头纸的比重降低， 同时使环保石头纸各项 物理机械性能得以优化， 柔韧性和尺寸稳定性也得以提升， 进一步使得 传统的石头纸的定义， 特性， 优势和应用领域产生质的变化。 本领域技 术人员可以根据纸张实际使用的需求对该环保石头纸的组分进行适当的 调整， 使其各项机械性质符合需求， 例如可根据实际需要进一步加入碳 酸钙等组分。  The short fibers in the present invention are fiber products having a fiber length of 10 to 15 mm, and cotton short fibers, short glass fibers, and the like can be used, and short cotton linters are preferably used. The short cotton linter used in the present invention refers to a short fiber remaining on the cotton seed after the cotton seed is rolled, and is a short cotton fiber which cannot be woven. After introducing it into environmentally-friendly stone paper, a series of changes have been made in the quality of environmentally friendly stone paper. The outstanding beneficial effect is to reduce the proportion of environmentally-friendly stone paper, and at the same time optimize the physical and mechanical properties of environmentally friendly stone paper, flexibility and Dimensional stability has also been enhanced, further enabling qualitative changes in the definition, characteristics, advantages and applications of traditional stone paper. Those skilled in the art can appropriately adjust the components of the environmentally-friendly stone paper according to the actual use requirements of the paper, so that the mechanical properties thereof meet the requirements, for example, calcium carbonate and the like can be further added according to actual needs.
本发明进一步提供的一种三层共挤环保石头纸， 包括表层和基层， 其结构如图 1 所示为： 表层 -基层 -表层的三层结构。 其中， 基层的组分 主要包括短纤维、 树脂及助剂。 本发明中优选基层的组分按基层质量百 分比计包括 30-50%的短纤维、 47-67%的树脂以及 2.2%-4.5%的助剂。 表 层的组分包括二氧化钛、 树脂和助剂， 其中二氧化钛具有遮光作用和增 白作用。本发明中优选表层的组分按表层质量百分比计包括 32-64%的二 氧化钛、 33-65%的树脂以及 2.2%-4.5%的助剂。 The invention further provides a three-layer co-extruded environmental protection stone paper comprising a surface layer and a base layer, the structure of which is shown in FIG. 1 : a three-layer structure of a surface layer-base layer-surface layer. Among them, the components of the base layer mainly include short fibers, resins and auxiliary agents. In the present invention, it is preferred that the composition of the base layer comprises 30-50% of short fibers, 47-67% of resin, and 2.2% to 4.5% of auxiliary agent in terms of the mass percentage of the base layer. Table The components of the layer include titanium dioxide, a resin and an auxiliary agent, wherein the titanium dioxide has a light blocking effect and a whitening effect. Preferably, the surface layer component of the present invention comprises 32-64% titanium dioxide, 33-65% resin, and 2.2%-4.5% auxiliary agent in terms of surface layer percentage.
本发明的三层共挤环保石头纸其基层和表层组分不同， 因此作用也 不相同。 基层具有支撑作用， 对环保石头纸的各项物理机械性质起决定 作用； 表层则主要用于印刷。 本领域技术人员可以根据纸张实际使用的 需求对上述基层和表层的组分进行适当的调整， 使其各项机械性质符合 需求， 其基层组分优选短棉绒， 此外也可根据实际需要在基层中进一步 加入碳酸钙等组分。 此外， 该环保石头纸的厚度为 0.08-0.15mm, 其表 层、 基层的厚度比例可根据印刷条件、 印刷要求和片材物理机械性能的 要求进行相应的调整， 本发明中优选基层的厚度占环保石头纸厚度的 70%-90%, 每一表层的厚度占环保石头纸厚度的 5%-15%, 上下表层的 厚度可以相同， 也可以根据需要调整为不同厚度。 在依据本发明的一个 实施例中， 纸张的基层厚度占 90%, 上下表层各占 5%。  The three-layer co-extruded environmentally friendly stone paper of the present invention has different base layers and surface layers, and therefore has different effects. The base layer has a supporting effect, which plays a decisive role in the physical and mechanical properties of environmentally friendly stone paper; the surface layer is mainly used for printing. Those skilled in the art can appropriately adjust the components of the above-mentioned base layer and surface layer according to the actual use requirements of the paper, so that the mechanical properties thereof meet the requirements, and the base layer components are preferably short cotton linters, and can also be at the base layer according to actual needs. Further, components such as calcium carbonate are added. In addition, the thickness of the environmentally-friendly stone paper is 0.08-0.15 mm, and the thickness ratio of the surface layer and the base layer can be adjusted according to the printing conditions, the printing requirements, and the physical and mechanical properties of the sheet. In the present invention, the thickness of the base layer is preferably environmentally friendly. 70%-90% of the thickness of the stone paper, the thickness of each surface layer accounts for 5%-15% of the thickness of the environmentally-friendly stone paper, the thickness of the upper surface layer can be the same, or can be adjusted to different thicknesses as needed. In one embodiment in accordance with the invention, the base layer thickness of the paper is 90% and the upper and lower layers each account for 5%.
本发明的表层和基层组分中的树脂可以釆用聚乙烯或聚丙烯等， 本 领域技术人员可以根据纸张制造的实际要求， 选择合适的树脂类型。 在 本发明中优选聚乙烯， 该聚乙烯中， 高密度聚乙烯占 55-65%, 低密度聚 乙烯占 25-35%, 线性低密度聚乙烯占 5-15%, 在依据本发明的一个实施 例中进一步优选为， 在聚乙烯中， 高密度聚乙烯占 60%, 低密度聚乙烯 占 30%, 线性低密度聚乙烯占 10%。  The resin in the surface layer and the base layer component of the present invention may be polyethylene or polypropylene or the like, and those skilled in the art may select a suitable resin type according to the actual requirements of paper manufacture. Polyethylene is preferred in the present invention, wherein the high density polyethylene accounts for 55-65%, the low density polyethylene accounts for 25-35%, and the linear low density polyethylene accounts for 5-15%, in accordance with the present invention. Further preferably, in the embodiment, in the polyethylene, the high density polyethylene accounts for 60%, the low density polyethylene accounts for 30%, and the linear low density polyethylene accounts for 10%.
本发明的表层和基层组分中的助剂主要包括复合偶联剂、 阻燃剂、 增容剂 （也可称为相容剂）、 爽滑剂 （也可称为分散剂）。 其中， 基层使 用的复合偶联剂即为其名称， 并不是指由多种偶联剂混合组成， 其作用 是使短棉绒等组分与树脂实现良好的链接， 本领域技术人员可以根据实 际使用的树脂、 短棉绒等组分， 选择合适的复合偶联剂， 例如 OL-AT系 列铝钛复合偶联剂， 在某些实施例中， 复合偶联剂还可与硅烷偶联剂共 用以增加链接强度。 在制备过程中挤出压延时， 用于制备基层、 表层的 组分处于流体形式的熔融状态， 应具有内润滑和外润滑特性， 即熔体内 部、 熔体和金属之间应有良好的润滑保证， 因此需要选择良好的爽滑剂 作为助剂， 保证其起到良好的润滑作用， 例如可以选用 RH型润滑剂作 为爽滑剂， 或者选用 WP型聚丙烯蜡或 WE型聚乙烯蜡等。 阻燃剂的作 用是可以使得纸张具备防火的功能， 例如可以选用阻燃 PP (此为名称）， 有效又环保， 也可用 FZY系列复合阻燃抑烟剂作为阻燃剂。 此外， 助剂 可根据所选用的树脂对应选择， 例如， 爽滑剂可根据所选用的树脂对应 选择为聚乙烯蜡或聚丙烯蜡 （如树脂是聚乙烯， 则爽滑剂用聚乙烯蜡； 如树脂是聚丙烯， 则爽滑剂用聚丙烯蜡）， 增容剂可以选用 POE8100型 增容剂或 POE8210型增容剂。 本发明中优选复合偶联剂占 0.2-0.5%, 阻 燃剂占 0.5-1%, 增容剂占 0.5-1%, 爽滑剂占 0.5-2%, 均分别以基层或 表层质量的百分比计算。 The auxiliaries in the surface layer and the base layer component of the present invention mainly include a composite coupling agent, a flame retardant, a compatibilizer (also referred to as a compatibilizer), and a slip agent (also referred to as a dispersant). Wherein, the composite coupling agent used in the base layer is the name thereof, and does not mean that it is composed of a mixture of a plurality of coupling agents, and the function thereof is to achieve a good linkage between the components such as short cotton linters and the resin, and those skilled in the art can The resin, short cotton linter and other components used, and a suitable composite coupling agent, such as OL-AT series aluminum-titanium composite coupling agent, may be selected. In some embodiments, the composite coupling agent may also be shared with the silane coupling agent. To increase the link strength. During the preparation process, the extrusion pressure is delayed, and the components used for preparing the base layer and the surface layer are in a molten state in a fluid form, and should have internal lubrication and external lubrication properties, that is, there should be good lubrication between the inside of the melt, between the melt and the metal. Guaranteed, therefore, it is necessary to choose a good slip agent as an auxiliary agent to ensure good lubrication. For example, RH type lubricant can be used as a slip agent, or WP type polypropylene wax or WE type polyethylene wax can be selected. The function of the flame retardant is to make the paper have the function of fire prevention. For example, the flame retardant PP (this name) can be selected, which is effective and environmentally friendly, and the FZY series composite flame retardant and smoke suppressant can also be used as the flame retardant. In addition, the auxiliary agent may be selected according to the selected resin. For example, the slip agent may be selected from polyethylene wax or polypropylene wax according to the resin selected (for example, the resin is polyethylene, and the smoothing agent is polyethylene wax; If the resin is polypropylene, the smoothing agent is made of polypropylene wax. The compatibilizer can be selected from POE8100 type compatibilizer or POE8210 type compatibilizer. In the present invention, the composite coupling agent is preferably 0.2-0.5%, which is resistant. The flammable agent accounts for 0.5-1%, the compatibilizer accounts for 0.5-1%, and the slip agent accounts for 0.5-2%, which are calculated as the percentage of the base layer or the surface layer respectively.
依据本发明的一种实施方式的三层共挤环保石头纸的制备方法， 如 图 2所示， 包括： 步骤 A, 将所有组分干燥至含水量小于 2%, 以保证 整个工艺流程的顺利进行。 步骤 B , 将基层的组分和表层的组分分别加 入高速搅拌机中于 100-110 °C下进行混合搅拌， 混合顺序为， 基层： 先 将短纤维搅拌 3-5分钟， 再加入助剂搅拌 3-5分钟， 混合均勾后加入树 脂搅拌 3-5分钟； 表层： 先将二氧化钛搅拌 3-5分钟， 再加入助剂搅拌 3-5分钟， 混合均勾后加入树脂搅拌 3-5分钟。 步骤 C , 将混合后的基层 的组分和表层的组分分别经真空捏合后造粒， 分别得到表层粒子和基层 粒子。 步骤 D , 将表层粒子和基层粒子送至挤压机， 如图 3所示， 在挤 压机中加热后经模头流出， 再经压延机压延到需要的厚度， 适当处理后 经收卷机收卷制备得到表层-基层-表层三层结构的环保石头纸。  A method for preparing a three-layer co-extruded environmentally friendly stone paper according to an embodiment of the present invention, as shown in FIG. 2, includes: Step A, drying all components to a water content of less than 2% to ensure smooth process flow get on. Step B, the components of the base layer and the components of the surface layer are respectively added to a high-speed mixer and mixed and stirred at 100-110 ° C, the mixing sequence is, the base layer: firstly stir the short fibers for 3-5 minutes, then add the auxiliary stirring. After mixing for 3-5 minutes, add the resin and stir for 3-5 minutes. Surface layer: Stir the titanium dioxide for 3-5 minutes, then add the auxiliary agent for 3-5 minutes. Mix the mixture and add the resin for 3-5 minutes. In step C, the components of the mixed base layer and the components of the surface layer are respectively subjected to vacuum kneading and then granulated to obtain surface layer particles and base layer particles, respectively. Step D, the surface layer particles and the base layer particles are sent to an extruder, as shown in FIG. 3, heated in an extruder, flowed out through the die, and then calendered to a desired thickness by a calender, and appropriately processed and then passed through a winder. The paper was prepared to obtain an environmentally friendly stone paper having a surface layer-base layer-surface three-layer structure.
以短棉绒为例， 进一步具体说明如下。  Take short cotton lining as an example, and further details are as follows.
依据本发明的一种实施例的制备方法中， 短棉绒在高速搅拌器中约 110 °C下加入偶联剂及其它助剂， 低速搅拌约 3-5分钟， 再加入树脂， 低 速搅拌 3-5分钟， 即实现短棉绒与树脂的良好链接， 两者形成一体， 保 证了环保石头纸性能的一致性。 为保证混合塑化效果， 提升产品质量， 基层的助剂加入顺序优选为先加入复合偶联剂，再加入阻燃剂、增容剂、 爽滑剂， 且每加入一种助剂后经过充分混合比如混合一分钟后再加入另 一种。  In the preparation method according to an embodiment of the present invention, the short lint is added to the coupling agent and other auxiliary agents at about 110 ° C in a high-speed stirrer, stirred at a low speed for about 3-5 minutes, and then added with a resin, low-speed stirring 3 - 5 minutes, that is, a good link between the short cotton linters and the resin, and the two are integrated to ensure the consistency of the performance of the environmentally friendly stone paper. In order to ensure the mixing plasticization effect and improve the product quality, the order of adding the auxiliary agent of the base layer is preferably firstly added with a composite coupling agent, then adding a flame retardant, a compatibilizer, a slip agent, and sufficient after each auxiliary agent is added. Mix, such as mixing for one minute before adding another.
在上述制备过程中， 当基层、 表层粒子送入三层共挤五辊压延机的 挤压机后， 基层的树脂、 短棉绒***与表层的二氧化钛、 树脂***均需 要保证其流体的流变性能良好。 此时， 基层、 表层的熔体流动性能良好 的考核标准是熔体流动速率应> 1 , 以保持其流动性能的一致性。熔体流 动速率由所选择的树脂、 配方、 工艺过程决定， 本领域技术人员可根据 实际情况， 釆取适当的条件控制好熔体流动速率。 其中挤出时各段的温 度的设定约为 90-110 °C— >220-240 °C—>100-120 °C左右，优选温度为 100 °C ->240 °C ->110 °C , 压延机的温度设定应在组分的维卡软化点以下， 即 150 °C以下， 在收卷前， 可进一步增加电晕处理、 静电消除、 在线厚 度非接触式测量等工序。  In the above preparation process, when the base layer and the surface layer particles are fed into the extruder of the three-layer co-extrusion five-roll calender, the resin of the base layer, the short lint system and the surface layer of the titanium dioxide and the resin system are required to ensure the rheology of the fluid. Good performance. At this time, the evaluation criteria for good melt flow properties of the base layer and the surface layer are that the melt flow rate should be > 1 to maintain the consistency of the flow properties. The melt flow rate is determined by the choice of resin, formulation, process, and those skilled in the art will be able to control the melt flow rate under appropriate conditions. The temperature of each section during extrusion is set to be about 90-110 °C ->220-240 °C ->100-120 °C, preferably 100 °C ->240 °C ->110 °C The temperature setting of the calender should be below the Vicat softening point of the component, that is, below 150 °C. Before the winding, the corona treatment, static elimination, and on-line thickness non-contact measurement can be further added.
下面通过具体实施例对本发明作进一步详细说明。在以下实施例中， 所使用的聚乙烯为市售的沙特 HTA-001HD聚乙烯， 所使用的二氧化钛 为美国杜邦的 R960二氧化钛， 所使用的复合偶联剂为深圳市优越昌浩 科技有限公司的 27#复合型偶联剂， 所使用的爽滑剂为上海松亚化工有 限公司的 8丁-108#爽滑剂， 所使用的阻燃剂为广州嘉卓贸易有限公司的 无机阻燃剂，所使用的增容剂为上海金山星星塑料有限公司的 WP-11增 容剂， 所使用的短棉绒为河南开封棉产公司的短棉绒， 所使用的碳酸钙 为南京欧米亚碳酸钙。 实施例 1 The invention will now be further described in detail by way of specific examples. In the following examples, the polyethylene used was a commercially available Saudi HTA-001HD polyethylene, and the titanium dioxide used was R960 titanium dioxide of DuPont, USA. The composite coupling agent used was 27 of Shenzhen Superior Changhao Technology Co., Ltd. #复合式耦合剂, the slip agent used is 8丁-108# slip agent of Shanghai Songya Chemical Co., Ltd. The flame retardant used is the inorganic flame retardant of Guangzhou Jiazhuo Trading Co., Ltd. The compatibilizer used is the WP-11 increase of Shanghai Jinshan Star Plastic Co., Ltd. For the agent, the short cotton linters used are the short cotton linters of Henan Kaifeng Cotton Production Co., Ltd. The calcium carbonate used is Nanjing Omega calcium carbonate. Example 1
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 57.5%, 二氧 化钛 40%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 55%, 短棉 绒 42.5%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。 具体制备过程如下：  Base component (weight percent of each component based on base mass): 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent . The specific preparation process is as follows:
1. 将以上各组分置于真空干燥箱内， 干燥至含水量小于 2%, 取出 待用。  1. Place the above components in a vacuum drying oven, dry to a moisture content of less than 2%, and remove for use.
2. 将短棉绒和二氧化钛分别放入高速搅拌机中， 设定温度为 100-110 °C左右， 以低速档搅拌 3-5分钟。  2. Place the short cotton linters and titanium dioxide in a high-speed mixer separately, set the temperature to about 100-110 °C, and stir at low speed for 3-5 minutes.
3. 依次将复合偶联剂、 阻燃剂、 增容剂、 爽滑剂分别加入至已加热 的短棉绒和二氧化钛中， 每种助剂加入之间间隔一分钟， 再将短棉绒混 合物和二氧化钛混合物分别置于高速搅拌机中， 设定温度为 100-110°C, 以高速档搅拌 3-5分钟。  3. Add the composite coupling agent, flame retardant, compatibilizer, and slip agent to the heated short lint and titanium dioxide, respectively, and add one minute between each additive, then mix the short lint mixture. The mixture with titanium dioxide was placed in a high-speed mixer separately, set at a temperature of 100-110 ° C, and stirred at a high speed for 3-5 minutes.
4. 分别将短棉绒助剂混合物与树脂混合搅拌、将二氧化钛助剂混合 物与树脂混合搅拌， 搅拌充分后分别送至真空捏合机捏合， 再分别送入 造粒机造粒， 分别得到表层粒子和基层粒子。  4. Mix the short lint auxiliary mixture with the resin separately, mix the titanium dioxide auxiliary mixture with the resin, stir well, then send it to the vacuum kneader for kneading, then send it to the granulator to granulate separately to obtain the surface particles. And base particles.
5. 将表层粒子和基层粒子送至挤压机，挤出时各段温度的设定约为 100°C—>240°C—>110°C左右， 将粒子融化成熔融状态， 经模头流出后， 用压延辊压成需要的厚度， 压延机的温度设定为 150°C以下， 再进行电 晕处理、 静电消除、 在线厚度非接触式测量等工序， 处理完成后收卷， 得到产品 1。 实施例 2  5. The surface particles and the base particles are sent to the extruder, and the temperature of each section during extrusion is set to about 100 ° C -> 240 ° C -> 110 ° C, the particles are melted into a molten state, through the die After flowing out, it is pressed to a desired thickness by a calender roll, and the temperature of the calender is set to 150 ° C or less, and then corona treatment, static elimination, on-line thickness non-contact measurement, and the like are completed, and the product is wound up to obtain a product. 1. Example 2
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 57.5%, 二氧 化钛 40%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 67%, 短棉 绒 30.8%, 复合偶联剂 0.2%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Base layer components (weight percent of each component based on the mass of the base layer): polyethylene 67%, short cotton linter 30.8%, composite coupling agent 0.2%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1% .
其制备步骤同实施例 1, 得到产品 2。 实施例 3 按以下配方制备环保石头纸。 The preparation procedure was the same as in Example 1 to obtain the product 2. Example 3 Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 57.5%, 二氧 化钛 40%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分（各组分重量百分比以基层质量计）： 聚乙烯 45.5%, 短棉 绒 50%, 复合偶联剂 0.5%, 阻燃剂 1%, 增容剂 1%, 爽滑剂 2%。  Base layer components (weight percent of each component based on the mass of the base layer): 45.5% polyethylene, 50% short cotton, 0.5% composite coupling, 1% flame retardant, 1% compatibilizer, 2% slip agent .
其制备步骤同实施例 1, 得到产品 3。 实施例 4  The preparation procedure was the same as in Example 1, and the product 3 was obtained. Example 4
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 57.5%, 二氧 化钛 40%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 47%, 短棉 绒 48.5%, 复合偶联剂 0.5%, 阻燃剂 1%, 增容剂 1%, 爽滑剂 2%。  Base layer components (weight percent of each component based on the mass of the base layer): 47% polyethylene, 48.5% short cotton, 0.5% composite coupling, 1% flame retardant, 1% compatibilizer, 2% slip agent .
其制备步骤同实施例 1, 得到产品 4。 实施例 5  The preparation procedure was the same as in Example 1, and the product 4 was obtained. Example 5
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 57.5%, 二氧 化钛 40%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分（各组分重量百分比以基层质量计）： 聚乙烯 66.7%, 短棉 绒 30%, 复合偶联剂 0.3%, 阻燃剂 0.75%, 增容剂 0.75%, 爽滑剂 1.5%。  Base layer components (weight percent of each component in terms of base layer mass): 66.7% polyethylene, 30% short cotton, 0.3% composite coupling, 0.75% flame retardant, 0.75% compatibilizer, 1.5% slip agent .
其制备步骤同实施例 1, 得到产品 5。 实施例 6  The preparation procedure was the same as in Example 1, and the product 5 was obtained. Example 6
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 63.5%, 二氧 化钛 32%, 复合偶联剂 0.5%, 阻燃剂 1%, 增容剂 1%, 爽滑剂 2%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 63.5%, titanium dioxide 32%, composite coupling agent 0.5%, flame retardant 1%, compatibilizer 1%, slip agent 2%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 55%, 短棉 绒 42.5%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Base component (weight percent of each component based on base mass): 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
其制备步骤同实施例 1, 得到产品 6。 实施例 7  The preparation procedure was the same as in Example 1, and the product 6 was obtained. Example 7
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 33.8%, 二氧 化钛 64%, 复合偶联剂 0.2%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer): polyethylene 33.8%, titanium dioxide 64%, composite coupling agent 0.2%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 55%, 短棉 绒 42.5%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。 其制备步骤同实施例 1, 得到产品 7。 实施例 8 Base component (weight percent of each component based on base mass): 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent . The preparation procedure was the same as in Example 1 to obtain the product 7. Example 8
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分 （各组分重量百分比以表层质量计）： 聚乙烯 65%, 二氧 化钛 32.7%, 复合偶联剂 0.3%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Surface composition (the weight percentage of each component is based on the surface quality): polyethylene 65%, titanium dioxide 32.7%, composite coupling agent 0.3%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 55%, 短棉 绒 42.5%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Base component (weight percent of each component based on base mass): 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
其制备步骤同实施例 1, 得到产品 8。 实施例 9  The preparation procedure was the same as in Example 1, and the product 8 was obtained. Example 9
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分 （各组分重量百分比以表层质量计）： 聚乙烯 33%, 二氧 化钛 63.7%, 复合偶联剂 0.3%, 阻燃剂 0.75%, 增容剂 0.75%, 爽滑剂 1.5%。  Surface composition (the weight percentage of each component is based on the surface quality): polyethylene 33%, titanium dioxide 63.7%, composite coupling agent 0.3%, flame retardant 0.75%, compatibilizer 0.75%, slip agent 1.5%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 55%, 短棉 绒 42.5%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Base component (weight percent of each component based on base mass): 55% polyethylene, 42.5% short cotton, 0.5% composite coupling, 0.5% flame retardant, 0.5% compatibilizer, 1% slip agent .
其制备步骤同实施例 1, 得到产品 9。 实施例 10  The preparation procedure was the same as in Example 1, and the product 9 was obtained. Example 10
按以下配方制备环保石头纸。  Prepare environmentally friendly stone paper according to the following formula.
表层组分（各组分重量百分比以表层质量计）： 聚乙烯 57.5%, 二氧 化钛 40%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  The surface layer components (the weight percentage of each component is based on the surface layer mass): polyethylene 57.5%, titanium oxide 40%, composite coupling agent 0.5%, flame retardant 0.5%, compatibilizer 0.5%, slip agent 1%.
基层组分 （各组分重量百分比以基层质量计）： 聚乙烯 50%, 短棉 绒 35%, 碳酸钙 12.5%, 复合偶联剂 0.5%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Base layer components (weight percent of each component based on the mass of the base layer): 50% polyethylene, 35% short cotton, 12.5% calcium carbonate, 0.5% composite coupling agent, 0.5% flame retardant, 0.5% compatibilizer, Slip agent 1%.
其制备步骤同实施例 1(在步骤 2中，将碳酸钙与短棉绒一同加入）， 得到产品 10。  The preparation procedure is the same as in Example 1 (in step 2, calcium carbonate is added together with short cotton linter) to obtain product 10.
以上制得的产品 1-10 的纸张厚度为 0.12±0.03mm, 其基层厚度占 纸张厚度的 90%, 其上下表层厚度各占纸张厚度的 5%。 对比例  The above-mentioned products 1-10 have a paper thickness of 0.12 ± 0.03 mm, a base layer thickness of 90% of the paper thickness, and an upper surface layer thickness of 5% of the paper thickness. Comparative example
将上述产品 1-10与传统 PP (聚丙烯） 单层石头纸就相关指标进行 如下对比实验， 结果如表 1所示。  The above-mentioned products 1-10 and the conventional PP (polypropylene) single-layer stone paper were compared with the relevant indexes as follows, and the results are shown in Table 1.
表 1 断裂 屈服 尺寸 断裂 Table 1 Fracture yield size fracture
比重 成本  Specific cost
伸长率 拉伸强度 变形性 拉伸强度  Elongation tensile strength deformability tensile strength
(g/cm3) (；万元 /吨） (g/cm 3 ) (; 10,000 yuan / ton)
(%) (N/mm2) (%) (N/mm2) (%) (N/mm 2 ) (%) (N/mm 2 )
产品 1 1.0 410 26 <2 30 0.58 产品 2 1.0 410 27 <2 29 0.59 产品 3 1.0 400 28 <2 31 0.60 产品 4 1.0 390 28 <2 31 0.61 产品 5 0.9 400 27 <2 30 0.60 产品 6 0.9 380 28 <2 30 0.60 产品 7 1.0 390 26 <2 31 0.59 产品 8 1.0 400 28.2 <2 31 0.58 产品 9 1.0 410 26 <2 31 0.59 产品 10 1.1 400 26 <2 30 0.60  Product 1 1.0 410 26 <2 30 0.58 Product 2 1.0 410 27 <2 29 0.59 Product 3 1.0 400 28 <2 31 0.60 Product 4 1.0 390 28 <2 31 0.61 Product 5 0.9 400 27 <2 30 0.60 Product 6 0.9 380 28 <2 30 0.60 Product 7 1.0 390 26 <2 31 0.59 Product 8 1.0 400 28.2 <2 31 0.58 Product 9 1.0 410 26 <2 31 0.59 Product 10 1.1 400 26 <2 30 0.60
对照 1.2 330 20 <3 20 0.60  Control 1.2 330 20 <3 20 0.60
注： 对照为 PP 单层石头纸， 其配方为 （按质量百分比计）： PP (聚 丙烯均聚物） 47.2%, 碳酸钙 50%, 偶联剂 0.8%, 阻燃剂 0.5%, 增容剂 0.5%, 爽滑剂 1%。  Note: The control is PP single-layer stone paper, the formula is (by mass percentage): PP (polypropylene homopolymer) 47.2%, calcium carbonate 50%, coupling agent 0.8%, flame retardant 0.5%, compatibilization 0.5% agent, 1% slip agent.
通过表 1可知，依据本发明制备得到环保石头纸在上述指标对比中， 较传统石头纸比重低， 各项物理机械性能好， 例如断裂伸长率高， 屈服 拉伸强度高， 断裂拉伸强度高。 同时， 依据本发明的石头纸较 PP石头 纸， 在稳定性实验中尺寸变化率的百分比低， 即尺寸稳定性好。 而成本 方面， 因依据本发明的环保石头纸比重低， 故实际生产的纸张数目较 PP 石头纸多， 从而降低了单位纸张的成本。 以上所述仅为本发明的较佳实施例， 并不用以限制本发明， 对于本 领域的一般技术人员， 依据本发明的思想， 可以对上述具体实施方式进 行变化。  It can be seen from Table 1 that the environmentally friendly stone paper prepared according to the present invention has a lower specific gravity than the conventional stone paper in the comparison of the above indexes, and has various physical and mechanical properties, such as high elongation at break, high tensile strength at yield, tensile strength at break. high. Meanwhile, the stone paper according to the present invention has a lower percentage of the dimensional change rate in the stability test than the PP stone paper, that is, the dimensional stability is good. On the cost side, since the environmentally-friendly stone paper according to the present invention has a low specific gravity, the actual number of sheets produced is larger than that of PP stone paper, thereby reducing the cost per unit paper. The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the above specific embodiments may be modified according to the idea of the present invention.

Claims

权 利 要 求 Rights request
1. 一种环保石头纸， 其组分包括树脂， 其特征在于： 组分还包括短 纤维， 所述短纤维是纤维长度为 10~15mm的纤维产品。 An environmentally friendly stone paper, the composition comprising a resin, characterized in that: the component further comprises short fibers, and the short fibers are fiber products having a fiber length of 10 to 15 mm.
2. 根据权利要求 1所述的环保石头纸， 其特征在于： 所述短纤维为 棉短纤维， 所述树脂为聚乙烯或聚丙烯。  The eco-friendly stone paper according to claim 1, wherein the short fibers are cotton short fibers, and the resin is polyethylene or polypropylene.
3. 根据权利要求 2所述的环保石头纸， 其特征在于： 所述棉短纤维 为短棉绒， 所述树脂为聚乙烯。  The eco-friendly stone paper according to claim 2, wherein the cotton staple fiber is short cotton wool, and the resin is polyethylene.
4. 根据权利要求 1-3任一项所述的环保石头纸， 其特征在于： 组分 中短纤维的重量百分比为 30~50%, 树脂的重量百分比为 47-67%。  The environmentally friendly stone paper according to any one of claims 1 to 3, wherein the weight percentage of the short fibers in the component is 30 to 50%, and the weight percentage of the resin is 47 to 67%.
5. 根据权利要求 4所述的环保石头纸， 其特征在于： 组分还包括重 量百分比为 2.2~4.5%的助剂， 所述助剂包括选自复合偶联剂、 阻燃剂、 增容剂和爽滑剂中的一种或几种。  5. The environmentally friendly stone paper according to claim 4, wherein: the component further comprises an auxiliary agent in a weight percentage of 2.2 to 4.5%, the auxiliary agent comprising a compounding agent selected from the group consisting of a composite coupling agent, a flame retardant, and a compatibilizing agent. One or more of a lotion and a slip agent.
6. 根据权利要求 1所述的环保石头纸， 其特征在于： 组分不包括碳 酸钙。  6. The environmentally friendly stone paper according to claim 1, wherein: the component does not include calcium carbonate.
7. 一种环保石头纸， 包括表层和基层， 其特征在于： 所述基层的组 分与权利要求 1~6任意一项所述的环保石头纸的组分相同， 所述表层的 组分按表层的质量百分比计， 包括 32-64%的二氧化钛、 33-65%的树脂 以及 2.2~4.5%的助剂。  An environmentally friendly stone paper comprising a surface layer and a base layer, wherein: the composition of the base layer is the same as the composition of the environmentally friendly stone paper according to any one of claims 1 to 6, and the composition of the surface layer is The percentage by mass of the surface layer includes 32-64% of titanium dioxide, 33-65% of resin, and 2.2 to 4.5% of auxiliary agent.
8. 根据权利要求 7所述的环保石头纸， 其特征在于： 表层和基层中 的树脂为聚乙烯， 其中， 高密度聚乙烯占 55-65% , 低密度聚乙烯占 25-35%, 线性低密度聚乙烯占 5-15%。  8. The environmentally friendly stone paper according to claim 7, wherein: the resin in the surface layer and the base layer is polyethylene, wherein the high density polyethylene accounts for 55-65%, and the low density polyethylene accounts for 25-35%, linear. Low density polyethylene accounts for 5-15%.
9. 根据权利要求 7或 8所述的环保石头纸， 其特征在于： 所述表层 为两个， 基层夹于两个表层之间， 所述基层的厚度占环保石头纸总厚度 的 70%-90%, 每一所述表层的厚度占环保石头纸总厚度的 5%-15%。  The environmentally friendly stone paper according to claim 7 or 8, wherein: the surface layer is two, and the base layer is sandwiched between two surface layers, and the thickness of the base layer accounts for 70% of the total thickness of the environmentally friendly stone paper. 90%, the thickness of each of the surface layers accounts for 5%-15% of the total thickness of the environmentally friendly stone paper.
10. 一种环保石头纸的制备方法， 其特征在于， 包括步骤：  10. A method for preparing an environmentally friendly stone paper, comprising the steps of:
A. 将各组分干燥至含水量小于 2%, 所述组分按照权利要求 7-9任 意一项的描述；  A. The components are dried to a moisture content of less than 2%, the components being as described in any one of claims 7-9;
B. 将基层的组分和表层的组分分别于 100-110 °C下进行混合搅拌， 混合顺序为，  B. Mixing the components of the base layer and the components of the surface layer at 100-110 ° C, respectively, in the order of mixing,
基层： 在短纤维中加入助剂， 混合均勾后加入树脂；  Base layer: Adding an auxiliary agent to the short fiber, adding the resin after mixing;
表层： 在二氧化钛中加入助剂， 混合均勾后加入树脂；  Surface layer: Adding an auxiliary agent to the titanium dioxide, mixing and adding the resin;
C. 混合后的基层的组分和表层的组分分别经真空捏合造粒，得到表 层粒子和基层粒子；  C. The components of the mixed base layer and the components of the surface layer are respectively granulated by vacuum kneading to obtain surface layer particles and base layer particles;
D. 将表层粒子和基层粒子经三层共挤压延， 制备得到表层-基层-表 层三层结构的环保石头纸。  D. The surface layer and the base layer particles are co-extruded through three layers to prepare an environmentally friendly stone paper having a surface layer-base layer-surface layer three-layer structure.
11. 根据权利要求 10所述的制备方法，其特征在于，所述步骤 B中， 加入助剂混合时， 助剂的添加顺序是依次加入复合偶联剂、 阻燃剂、 增 容剂、 爽滑剂， 且每加入一种助剂后经过充分混合再加入另一种。 The preparation method according to claim 10, wherein in the step B, When the additive is added, the auxiliary agent is added in the order of adding a composite coupling agent, a flame retardant, a compatibilizer, a slip agent, and each of the additives is thoroughly mixed and then added to the other.
12. 根据权利要求 10或 11所述的制备方法， 其特征在于， 所述步 骤 D中， 釆用三层共挤五辊压延机， 其包括挤压机部分和压延机部分， 所述挤压机中各段的挤出温度设定为 90-110 °C、 220-240 °C , 100-120 °C , 压延机的温度设定小于 150 °C。  The preparation method according to claim 10 or 11, wherein in the step D, a three-layer co-extrusion five-roll calender is used, which comprises an extruder portion and a calender portion, the extrusion The extrusion temperature of each section of the machine is set to 90-110 °C, 220-240 °C, 100-120 °C, and the temperature of the calender is set to less than 150 °C.
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