CN114988758A - Stone paper substrate master batch, stone paper and preparation method of stone paper - Google Patents
Stone paper substrate master batch, stone paper and preparation method of stone paper Download PDFInfo
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- CN114988758A CN114988758A CN202110978879.7A CN202110978879A CN114988758A CN 114988758 A CN114988758 A CN 114988758A CN 202110978879 A CN202110978879 A CN 202110978879A CN 114988758 A CN114988758 A CN 114988758A
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- stone paper
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- master batch
- silicon dioxide
- calcium carbonate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/045—Polyalkenes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/82—Coloured materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a technical scheme of a stone paper base material master batch, stone paper and a preparation method of the stone paper, wherein the stone paper base material master batch comprises 65-85 parts of nano calcium carbonate and 15-35 parts of silicon dioxide with meshes of 1050-1500 in parts by weight. In the technical scheme, the raw material master batches used for stone paper are added with silicon dioxide powder, so that the stone paper has enough surface area and gaps, can be favorable for flowing of liquid such as spraying and printing, improves the use performance of the stone paper, and is favorable for improving the mechanical performance. Meanwhile, the master batch and the stone paper have simple components, and are beneficial to simplifying the preparation process. The stone paper can be used for building materials, stationery, heat insulation materials and the like, such as writing, corrugated paper, diaphragm paper, label paper and the like.
Description
Technical Field
The invention relates to the technical field of stone paper making, in particular to stone paper base material master batches, stone paper and a preparation method of the stone paper.
Background
The stone paper is also called composite paper, and is made by using calcium carbonate as main raw material, adding high-molecular resin and adjuvant, mixing, banburying, granulating, calendering and stretching.
The stone paper is free from water addition, waste gas emission and the like in the manufacturing process, and has no pollution to the environment.
At present, stone paper technology is continuously improved, and product performance is continuously improved. Because the stone paper has the characteristics of paper and plastics, and has low cost, good strength and waterproof and moistureproof performances, the stone paper has wide application occasions, such as the fields of packaging, printing, electronics, namely, biopharmaceuticals and the like.
The existing stone paper manufacturing methods are various, and basically, various functional additives are added into calcium carbonate powder to form master batches, and then the stone paper is produced by different paper making machines. The existing stone paper master batch is mostly formed by calcium carbonate and polymer auxiliary agents, and has poor compatibility with high polymers such as resin during granulation, so that the performance of the stone paper is poor.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a stone paper substrate master batch, stone paper and a preparation method of the stone paper, and aims to solve the problem that the performance of the stone paper is influenced due to the complex components and low compatibility of the existing stone paper.
In order to solve the above technical problems, one of the basic technical solutions proposed by the present invention is:
on one hand, the stone paper base material master batch is provided, and the stone paper base material master batch comprises the following components in parts by weight:
65-85 parts of nano calcium carbonate;
15-35 parts of silicon dioxide;
wherein, the nano calcium carbonate and the silicon dioxide are powder with the mesh number between 1050 meshes and 1500 meshes.
Further, 1-5 parts of food-grade color masterbatch is also included.
Further, the stone paper base material master batch is prepared by the following steps:
step S1, putting the ore into a crusher for primary crushing;
step S2, putting the primarily crushed ore into a gravity screening machine for screening, and selecting calcium carbonate ore particles and silicon dioxide ore particles;
step S3, respectively putting calcium carbonate ore particles and silicon dioxide ore particles into decontamination equipment to realize impurity removal;
step S4, respectively putting the calcium carbonate particles and the silicon dioxide particles after impurity removal into different grinding machines to respectively obtain nano calcium carbonate powder and silicon dioxide powder with meshes of 1050-1500;
step S5, weighing 70-80 parts of nano calcium carbonate and 20-30 parts of silicon dioxide, putting into a high-speed stirrer together, and fully stirring to obtain a mixture, wherein the temperature is controlled between 80-120 ℃ during stirring, and the stirring is carried out for 40-60 minutes at the rotation speed of 800-1200 r;
step S6, putting the mixture into an internal mixing device for anhydrous internal mixing, wherein the internal mixing temperature is controlled to be 80-120 ℃, and the internal mixing time is 20-40 minutes;
and step S7, feeding the internally mixed mixture into a granulator to extrude the stone paper base material master batch.
Further, the ore is one or more of limestone, calcite, dolomite, granite, coal gangue and tailing slag.
Further, the components are as follows according to parts by weight:
70 parts of nano calcium carbonate and 30 parts of silicon dioxide;
or 80 parts of nano calcium carbonate and 20 parts of silicon dioxide.
In addition, the invention also provides stone paper which comprises the following components in parts by weight:
70-80 parts of stone paper base material master batch;
10-15 parts of resin;
1-5 parts of an auxiliary agent;
the master batch of the stone paper base material is any one of the master batches of the stone paper base material.
Further, the resin is polyethylene or polypropylene.
Further, the stone paper comprises the following components in parts by weight:
80 parts of stone paper base material master batch;
15 parts of resin;
and 5 parts of an auxiliary agent.
Finally, the invention also provides a preparation method of the stone paper, which comprises the following steps:
(1) 70-80 parts of stone paper base material master batch and 1-5 parts of auxiliary agent are put into a high-speed mixer for mixing treatment;
(2) adding 10-15 parts of resin into the high-speed mixer in the step (1) and uniformly stirring to obtain coated mixed master batch;
(3) and putting the coated mixed master batch into a casting stretcher to produce the stone paper.
Further, the stone paper surface modification treatment method comprises a stone paper surface modification treatment step, wherein a modification layer is covered on the stone paper surface, and the modification layer comprises a silica pigment and an adhesive in a weight ratio of 5: 1.
The invention has the beneficial effects that:
the technical scheme of the invention provides a stone paper base material master batch, stone paper and a preparation method of the stone paper, wherein the stone paper base material master batch comprises 65-85 parts of nano calcium carbonate and 15-35 parts of silicon dioxide with meshes of 1050-1500 in parts by weight. When the stone paper is prepared specifically, 70-80 parts of stone paper base material master batch and 1-5 parts of auxiliary agent are put into a high-speed mixer for mixing treatment, and then 10-15 parts of resin is put into the high-speed mixer for uniformly stirring to obtain coated mixed master batch; and finally, putting the coated mixed master batch into a casting stretcher to produce the stone paper. Among this technical scheme, as the raw materials master batch of stone paper add silica powder for have sufficient surface area and space, can be favorable to the flow of liquid such as spraying, printing, improve the performance of stone paper, and be favorable to mechanical properties's promotion. Meanwhile, the master batch and the stone paper have simple components, and are beneficial to simplifying the preparation process. The stone paper can be used for building materials, stationery, heat insulation materials and the like, such as writing, corrugated paper, diaphragm paper, label paper and the like.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention provides that on one hand, the stone paper base material master batch comprises 65-85 parts of nano calcium carbonate and 15-35 parts of silicon dioxide in parts by weight; wherein, the nano calcium carbonate and the silicon dioxide are powder with the mesh number between 1050 meshes and 1500 meshes.
Compared with the traditional stone paper master batch, the stone paper base batch disclosed by the invention contains a large amount of silicon dioxide with the mesh number of 1050-1500 meshes, so that the prepared stone paper has enough surface area and gaps, the flowing of liquid such as spraying and printing can be facilitated, the service performance of the stone paper is improved, and the improvement of the mechanical performance is facilitated.
In addition, in order to prepare master batches with different colors and further produce stone paper with different colors, 1-5 parts of food-grade master batches are further included in some embodiments. Namely, the stone paper base material master batch disclosed by the invention contains food-grade color master batch besides nano calcium carbonate and silicon dioxide, so that different color requirements are met.
Specifically, the stone paper base material master batch is prepared by the following steps:
step S1, putting the ore into a crusher for primary crushing; the ore is one or more of limestone, calcite, dolomite, granite, coal gangue and tailing slag. Different ores can be adopted for crushing to obtain the required raw materials. In particular, the preliminary crushing is usually performed by a crusher, such as a jaw crusher, a gyratory crusher, or the like. The specific selection can be made according to the actual ore type. The ore after primary crushing obtains ore particles with specific size requirements.
And step S2, putting the primarily crushed ore into a gravity screening machine for screening, and selecting to obtain calcium carbonate ore particles and silicon dioxide ore particles. That is, in this step, the crushed ore is passed through a gravity screening machine to obtain the desired ore. In this example, calcium carbonate ore particles and silica ore particles were obtained by screening.
And step S3, respectively putting the calcium carbonate ore particles and the silicon dioxide ore particles into decontamination equipment to realize impurity removal. This step is intended to remove impurities from the corresponding ore particles. Specifically, the method may be carried out by washing with water or the like. Actual decontamination can be achieved by any suitable method known in the art.
And step S4, respectively putting the calcium carbonate particles and the silicon dioxide particles after impurity removal into different grinding machines to respectively obtain nano calcium carbonate powder and silicon dioxide powder with the mesh number of 1050-1500 meshes. The method aims to refine calcium carbonate and silicon dioxide, facilitate processing, increase the surface area, improve the clearance rate, enhance the strength and meet the use requirement. Among them, 1250 mesh is preferably used.
Step S5, weighing 65-85 parts of nano calcium carbonate and 15-35 parts of silicon dioxide, putting into a high-speed stirrer together, fully stirring to obtain a mixture, controlling the temperature between 80-120 ℃ during stirring, and stirring for 40-60 minutes at the rotation speed of 800-1200 r. The method is characterized by realizing the full mixing of the silicon dioxide and the nano calcium carbonate and ensuring the uniform dispersion.
And step S6, putting the mixture into an internal mixing device for anhydrous internal mixing, wherein the internal mixing temperature is controlled to be 80-120 ℃, and the internal mixing time is 20-40 minutes. The main purpose of this step is to fully fuse the nano calcium carbonate and the silica together.
And step S7, feeding the internally mixed mixture into a granulator to extrude the stone paper base material master batch. In the step, the stretching and the cutting are realized through a granulator to realize granulation. In specific application, different types of granulators are adopted according to actual requirements.
The stone paper master batch mainly comprises nano calcium carbonate and silicon dioxide, compared with the traditional stone paper master batch, the stone paper master batch contains 15-35 parts of silicon dioxide, the specific gravity of the silicon dioxide and the nano calcium carbonate is approximately between 17.6% and 53.8%, and the content is higher. The stone paper prepared from the stone paper master batch has enough gaps, is convenient to write, has enough mechanical strength, is easy to degrade and is environment-friendly. Meanwhile, the stone paper master batch can be prepared into various different papers, such as paper for cartons, label paper, spray-painted paper, rice paper and the like; can also be prepared into building material paper, stationery paper, insulating material paper, heat insulation paper and the like by adding some common additives.
Preferably, in the technical scheme, the components can be 70 parts of nano calcium carbonate and 30 parts of silicon dioxide by weight; or 80 parts of nano calcium carbonate and 20 parts of silicon dioxide. The stone paper master batches obtained in the two embodiments can be used as universal master batches and can be used for preparing raw materials of various types of paper.
In addition, the invention also provides stone paper which comprises 70-80 parts of stone paper base material master batch by weight; 10-15 parts of resin; 1-5 parts of an auxiliary agent; the stone paper base material master batch is any one of the stone paper base material master batches. The resin is polyethylene or polypropylene. The auxiliary agent can be an adhesive. The specific auxiliary agents may be selected according to the use of the paper.
In a specific embodiment, the stone paper comprises the following components in parts by weight: 80 parts of stone paper base material master batch, 15 parts of resin and 5 parts of auxiliary agent.
Finally, the invention also provides a preparation method of the stone paper, which comprises the following steps:
(1) 70-80 parts of stone paper base material master batch and 1-5 parts of auxiliary agent are put into a high-speed mixer for mixing treatment;
(2) adding 10-15 parts of resin into the high-speed mixer in the step (1) and uniformly stirring to obtain coated mixed master batch;
(3) and putting the coated mixed master batch into a casting stretcher to produce the stone paper.
The stone paper obtained by the method forms a coating structure, namely, the stone paper base material master batch is fully mixed with the auxiliary agent, the auxiliary agent layer structure is formed on the outer surface of the stone paper base material master batch, and then the stone paper base material master batch is mixed with the resin, so that the stone paper base material master batch and the resin are tightly combined, namely, the stone paper base material master batch and the resin can be tightly combined together through the auxiliary agent. The stone paper base material master batch obtained by the method is of a coating layer structure, the innermost layer is the stone paper base material master batch, the middle layer is the auxiliary agent, and the outermost layer is resin. The stone paper master batch obtained by the method can strengthen the problem of interface compatibility and strengthen the interface compatibility.
In addition, different functional additives can be added respectively through the method, and the purposes of flame retardance, aging resistance, easy degradation and the like are achieved. For example, titanium dioxide, barium sulfate, aluminum hydroxide, etc., are added to achieve different effects.
The stone paper obtained by the method can also be subjected to a stone paper surface modification step, and specifically the step is to cover a modification layer on the surface of the stone paper, wherein the modification layer comprises a silica pigment and an adhesive in a weight ratio of 5: 1. The stone paper obtained by this method has sufficient smoothness.
Wherein the adhesive can be polyvinyl alcohol, such as PVA-1799. The silica may be one or both of precipitated silica and colloidal silica. When two components are employed, the ratio of precipitated silica to colloidal silica may be 7:3 or 6: 4.
Example 1:
the stone paper base material master batch comprises the following components in parts by weight: 70 parts of nano calcium carbonate and 30 parts of silicon dioxide.
The stone paper comprises the following components in parts by weight: 70 parts of stone paper base material timber, 15 parts of resin and 5 parts of auxiliary agent.
Putting 70 parts of stone paper base material master batch and 5 parts of auxiliary agent into a high-speed mixer for mixing treatment; then, 10 to 15 parts of resin is put into a medium high-speed mixer and is uniformly stirred to obtain coated mixed master batch; and finally, putting the coated mixed master batch into a casting stretcher to produce white stone paper with the thickness of 3 mm.
Through detection, the following detection data are obtained:
1. according to FDA 21CFR 177.1520, the olefin based polymer test results are as follows:
2. various harmful elements and harmful components are detected, and the specific detection results are as follows:
2.1 detection basis:
2.2 results of the assay
Remarking: the samples for detecting lead, cadmium and mercury are completely dissolved.
Undetected (detection limit of Xiaoyu method)
-mg/kg ppm
| Test items | Results | Method detection limit |
| Lead (Pb) | N.D. | 2mg/kg |
| Cadmium (Cd) | N.D. | 2mg/kg |
| Mercury (Hg) | N.D. | 2mg/kg |
| Hexavalent chromium (Cr (VI)) | N.D. | 8mg/kg |
3. The mechanical property detection results are as follows:
according to detection, the harmful substances of the stone paper prepared by the embodiment are far smaller than a standard value, and can meet the requirements of being used in the edible field; and the mechanical property is better than that of the traditional paper.
In addition, the stone paper obtained after coating by using the 5:1 silicon dioxide pigment and the adhesive has enough smoothness. Wherein the silica comprises precipitated silica and colloidal silica, and the ratio of the precipitated silica to the colloidal silica can be 7: 3; the adhesive is PVA-1799. According to the test, the stone paper coated by the present example has excellent smoothness. The stone paper has the advantages that the reasonable proportion of the silicon dioxide in the surface modification layer is mainly benefited, and meanwhile, the stone paper has a smooth surface due to the adoption of the reasonable proportion of the components of the nano calcium carbonate and the silicon dioxide.
The specific test data are as follows:
| coating formulation | Whiteness (%) | Smoothness(s) | Glossiness (60 degree) |
| Example 1 (No coating) | 81.21 | 82 | 2.7 |
| Example 1 (coated) | 82.01 | 156 | 2.9 |
| The yield is 128g/m 2 Color spray paper | 90.54 | 39 | 2.6 |
Variations and modifications to the above-described embodiments may occur to those skilled in the art based upon the disclosure and teachings of the above specification. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The stone paper base material master batch comprises the following components in parts by weight:
65-85 parts of nano calcium carbonate;
15-35 parts of silicon dioxide;
wherein, the nano calcium carbonate and the silicon dioxide are powder with the mesh number between 1050 meshes and 1500 meshes.
2. The stone paper substrate masterbatch of claim 1, wherein:
also comprises 1-5 parts of food-grade color master batch.
3. The stone paper substrate masterbatch of claim 1, wherein the stone paper substrate masterbatch is prepared by the following steps:
step S1, putting the ore into a crusher for primary crushing;
step S2, putting the primarily crushed ore into a gravity screening machine for screening, and selecting calcium carbonate ore particles and silicon dioxide ore particles;
step S3, respectively feeding calcium carbonate ore particles and silicon dioxide ore particles into decontamination equipment to realize impurity removal;
step S4, respectively putting the calcium carbonate particles and the silicon dioxide particles after impurity removal into different grinding machines to respectively obtain nano calcium carbonate powder and silicon dioxide powder with the mesh number of 1050-1500 meshes;
step S5, weighing 70-80 parts of nano calcium carbonate and 20-30 parts of silicon dioxide, putting into a high-speed stirrer together, and fully stirring to obtain a mixture, wherein the temperature is controlled between 80-120 ℃ during stirring, and the stirring is carried out for 40-60 minutes at the rotation speed of 800-1200 r;
step S6, putting the mixture into an internal mixing device for anhydrous internal mixing, wherein the internal mixing temperature is controlled to be 80-120 ℃, and the internal mixing time is 20-40 minutes;
and step S7, feeding the internally mixed mixture into a granulator to extrude the stone paper base material master batch.
4. The method for preparing the stone paper substrate master batch as claimed in claim 3, wherein the method comprises the following steps:
the ore is one or more of limestone, calcite, dolomite, granite, coal gangue and tailing slag.
5. The stone paper substrate master batch as claimed in claim 1, which comprises the following components in parts by weight:
70 parts of nano calcium carbonate and 30 parts of silicon dioxide;
or 80 parts of nano calcium carbonate and 20 parts of silicon dioxide.
6. The stone paper comprises the following components in parts by weight:
70-80 parts of stone paper base material master batch;
10-15 parts of resin;
1-5 parts of an auxiliary agent;
wherein, the stone paper base material master batch is the stone paper base material master batch of any one of claims 1 to 5.
7. The stone paper as claimed in claim 6, wherein:
the resin is polyethylene or polypropylene.
8. The stone paper as claimed in claim 6, wherein the stone paper comprises the following components in parts by weight:
80 parts of stone paper base material master batch;
15 parts of resin;
and 5 parts of an auxiliary agent.
9. The preparation method of the stone paper is characterized by comprising the following steps:
(1) 70-80 parts of stone paper base material master batch and 1-5 parts of auxiliary agent are put into a high-speed mixer for mixing treatment;
(2) adding 10-15 parts of resin into the high-speed mixer in the step (1) and uniformly stirring to obtain coated mixed master batch;
(3) and putting the coated mixed master batch into a casting stretcher to produce the stone paper.
10. The method for preparing stone paper as claimed in claim 9, further comprising a stone paper surface modification treatment step, wherein the step is to cover a modification layer on the stone paper surface, and the modification layer comprises a silica pigment and an adhesive in a weight ratio of 5: 1.
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2021
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