CN103172893A - Preparation method of special de-molding regenerated cellulose membrane - Google Patents
Preparation method of special de-molding regenerated cellulose membrane Download PDFInfo
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- CN103172893A CN103172893A CN2013100944140A CN201310094414A CN103172893A CN 103172893 A CN103172893 A CN 103172893A CN 2013100944140 A CN2013100944140 A CN 2013100944140A CN 201310094414 A CN201310094414 A CN 201310094414A CN 103172893 A CN103172893 A CN 103172893A
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Abstract
The invention discloses a preparation method of a special de-molding regenerated cellulose membrane. The preparation method of the special de-molding regenerated cellulose membrane comprises the following steps of: (1) preparing viscose: alkalifying, squeezing, aging, yellowing, dissolving, maturing, filtering and de-foaming cotton pulp with a weight ratio of 20-80% and wood pump with a weight ratio of 80-20% to prepare the viscose, and injecting the viscose into a thin film molding device, so as to generate a thin film; (2) desulfurizing and bleaching: desulfurizing the thin film and bleaching; (3) plastifying the thin film: soaking the desulfurized and bleached thin film in plastifying liquid, and plastifying the thin film for 4-10 seconds at a temperature of 50-60 DEG C; and (4) drying and humidifying: drying and humidifying the plastified thin film so as to prepare the regenerated cellulose membrane. The preparation method has the advantages of simple steps, convenience in operation and no pollution; the obtained product is degradable, meets the requirement on environmental friendliness, has the characteristics of no toxin and no smell, no color and transparency, high-temperature resistance and no adhesion, and can be directly used for machining a de-molding material through a mould.
Description
Technical field
The present invention relates to the preparation method of the special-purpose regenerated cellulose film of a kind of demoulding.
Background technology
Under the Environmental Protection Situation of current sternness, the application of regenerated cellulose film is more and more wider, regenerated cellulose film with the high temperature resistant adhesion of its uniqueness, easily tear, easily distortion, good permeability, printing composite performance are good enjoys favor.In the course of processing of various moulds, the requisite release materials of having used, and the most basic requirement of release materials is high temperature resistant, adhesion.The release materials of using on market now is generally release paper, release cloth etc., and its processing is generally take paper, fiber etc. as base material, makes after coating one deck releasing agent.And the present invention relates to be special produce a kind of can be directly as the regenerated cellulose film of release materials, this film need not to apply releasing agent, can directly be used as release materials, and adhesion, can separate with mould easily.
At present, abroad this film production producer is mainly Japanese two village chemical companies, and production technology is mature and stable, and technology is in world lead level.And domestic to this product research and produce and still belong to blank, the whole dependence on import of domestic use to this product.Therefore, develop the special-purpose regenerated cellulose film of the large demoulding of this market requirement, catching up with and surpassing as early as possible the same kind of products at abroad level becomes the task of top priority.
Summary of the invention
The preparation method who the purpose of this invention is to provide the special-purpose regenerated cellulose film of a kind of demoulding.
In order to realize the foregoing invention purpose, the preparation method of the special-purpose regenerated cellulose film of the demoulding provided by the present invention comprises the following steps:
(1) viscose glue preparation: choosing weight ratio is the wood pulps of Cotton Pulp and the 80-20% of 20-80%, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue injects film forming device, film former;
(2) desulfurization bleaching: film is carried out desulfurization, bleaching;
(3) film plasticizing: the film after desulfurization, bleaching is immersed in plastifying liquid, plastify 4-10 second under the condition of temperature 50-60 ℃;
(4) dry damping: after the film drying after plasticizing, damping, just make described regenerated cellulose film.
The mixed solution of described plastifying liquid for being comprised of following raw material: concentration is the aqueous glycerin solution of 60-90g/L, consumption is 80-100kg/ ton film, concentration is the triglycol aqueous solution of 15-25g/L, consumption is 25-35kg/ ton film, concentration is the glycol ether aqueous solution of 15-25g/L, and consumption is 25-35kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 10-15g/L, and consumption is 8-12 kg/ ton film.In the aqueous solution of above-mentioned each raw material, institute's water is softening water.
The present invention makes through viscose glue preparation, film generation, desulfurization bleaching, film plasticizing and dry damping five road steps.Known operation under film generation, desulfurization bleaching, film plasticizing and dry damping operation are in technical field; Known operation under alkalization in the viscose glue preparation process, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation also are in technical field.The present invention plant each step equipment used be under known equipment in technical field.
The present invention is raw materials used, is the commercial goods.Wherein glycerine, triglycol, glycol ether are softening agents, and its effect is the pliability that improves regenerated cellulose film, avoids the film embrittlement; Silicon sol is antisticking agent, and adhesion when making film take-up is completed rolling smoothly.
The present invention adopts take natural cellulose as raw material, the special-purpose regenerated cellulose film of the preparation demoulding, and in actual applications, degradable has reached the requirement of environmental protection.It is simple that the method for the invention has step, convenient operation, and the advantage such as pollution-free, products obtained therefrom is nonpoisonous and tasteless, water white transparency, high temperature resistant adhesion, can be directly used in the Mould Machining release materials.
The special-purpose regenerated cellulose film of the demoulding that the method for the invention is produced, its leading indicator is: quantitatively: 50 ± 2.0g/m
2, moisture: 6.0-10.0%, machine direction tensile strength: 〉=45N/15mm, longitudinal tensile strain rate 〉=20%.
Embodiment
Further illustrate by the following examples the preparation method's of regenerated cellulose film formula, these embodiment only are used for explanation the present invention and the present invention are not limited.
Embodiment 1
(1) choosing weight ratio is 20% Cotton Pulp and 80% wood pulps, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue is injected film forming device, film former.(2) film is carried out desulfurization, bleaching; (3) film after desulfurization, bleaching is changed over to the plasticizing pond, make it to immerse in plastifying liquid, under the condition of temperature 50 C the plasticizing 10 seconds.The plastifying liquid mixed solution that following raw material forms of serving as reasons: concentration is the aqueous glycerin solution of 60g/L, and consumption is 80kg/ ton film, and concentration is the triglycol aqueous solution of 15g/L, and consumption is 25kg/ ton film, and concentration is the glycol ether aqueous solution of 15g/L, and consumption is 25kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 10g/L, and consumption is 8kg/ ton film.(4) film after the plasticizing after heat-wind circulate drying, damping chamber damping, just makes described regenerated cellulose film.The performance index of gained regenerated cellulose film are: quantitatively: 50.5g/m
2, moisture: 8.2%, machine direction tensile strength: 50.25N/15mm, longitudinal tensile strain rate 20.88%.
Embodiment 2
(1) choosing weight ratio is 50% Cotton Pulp and 50% wood pulps, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue is injected film forming device, film former.(2) film is carried out desulfurization, bleaching; (3) film after desulfurization, bleaching is changed over to the plasticizing pond, make it to immerse in plastifying liquid, under the condition of 55 ℃ of temperature the plasticizing 8 seconds.The plastifying liquid mixed solution that following raw material forms of serving as reasons: concentration is the aqueous glycerin solution of 80g/L, and consumption is 88kg/ ton film, and concentration is the triglycol aqueous solution of 18g/L, and consumption is 29kg/ ton film, and concentration is the glycol ether aqueous solution of 34g/L, and consumption is 32kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 12g/L, and consumption is 11kg/ ton film.(4) film after the plasticizing after heat-wind circulate drying, damping chamber damping, just makes described regenerated cellulose film.The performance index of gained regenerated cellulose film are: quantitatively: 50.8g/m
2, moisture: 7.4%, machine direction tensile strength: 49.98N/15mm, longitudinal tensile strain rate 22.02%.
Embodiment 3
(1) choosing weight ratio is 70% Cotton Pulp and 30% wood pulps, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue is injected film forming device, film former.(2) film is carried out desulfurization, bleaching; (3) film after desulfurization, bleaching is changed over to the plasticizing pond, make it to immerse in plastifying liquid, under the condition of 58 ℃ of temperature the plasticizing 6 seconds.The plastifying liquid mixed solution that following raw material forms of serving as reasons: concentration is the aqueous glycerin solution of 90g/L, and consumption is 95kg/ ton film, and concentration is the triglycol aqueous solution of 20g/L, and consumption is 32kg/ ton film, and concentration is the glycol ether aqueous solution of 22g/L, and consumption is 30kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 13g/L, and consumption is 12kg/ ton film.(4) film after the plasticizing after heat-wind circulate drying, damping chamber damping, just makes described regenerated cellulose film.The performance index of gained regenerated cellulose film are: quantitatively: 51.4g/m
2, moisture: 7.6%, machine direction tensile strength: 52.64N/15mm, longitudinal tensile strain rate 22.44%.
Embodiment 4
(1) choosing weight ratio is 30% Cotton Pulp and 70% wood pulps, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue is injected film forming device, film former.(2) film is carried out desulfurization, bleaching; (3) film after desulfurization, bleaching is changed over to the plasticizing pond, make it to immerse in plastifying liquid, under the condition of 54 ℃ of temperature the plasticizing 8 seconds.The plastifying liquid mixed solution that following raw material forms of serving as reasons: concentration is the aqueous glycerin solution of 95g/L, and consumption is 98kg/ ton film, and concentration is the triglycol aqueous solution of 22g/L, and consumption is 33g/ ton film, and concentration is the glycol ether aqueous solution of 23g/L, and consumption is 30kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 14g/L, and consumption is 11 kg/ ton films.(4) film after the plasticizing after heat-wind circulate drying, damping chamber damping, just makes described regenerated cellulose film.The performance index of gained regenerated cellulose film are: quantitatively: 50.2g/m
2, moisture: 8.0%, machine direction tensile strength: 49.78N/15mm, longitudinal tensile strain rate 22.56%.
Embodiment 5
(1) choosing weight ratio is 80% Cotton Pulp and 20% wood pulps, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue is injected film forming device, film former.(2) film is carried out desulfurization, bleaching; (3) film after desulfurization, bleaching is changed over to the plasticizing pond, make it to immerse in plastifying liquid, under the condition of temperature 60 C the plasticizing 4 seconds.The plastifying liquid mixed solution that following raw material forms of serving as reasons: concentration is the aqueous glycerin solution of 100g/L, and consumption is 100kg/ ton film, and concentration is the triglycol aqueous solution of 25g/L, and consumption is 35kg/ ton film, and concentration is the glycol ether aqueous solution of 25g/L, and consumption is 35kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 15g/L, and consumption is 12 kg/ ton films.(4) film after the plasticizing after heat-wind circulate drying, damping chamber damping, just makes described regenerated cellulose film.The performance index of gained regenerated cellulose film are: quantitatively: 52.0g/m
2, moisture: 8.6%, machine direction tensile strength: 55.02N/15mm, longitudinal tensile strain rate 22.34%.
The product that the method for the invention is produced, the examination criteria of its performance index is as follows: quantitatively detect according to " GB/T 451.2 paper and the quantitative measuring method of cardboard "; Moisture detects according to " mensuration of GB/T 462 paper and moisture of paper board "; Tensile strength, elongation detect according to " mensuration of GB/T 12914 paper and cardboard tensile strength ".
Claims (2)
1. the preparation method of the special-purpose regenerated cellulose film of the demoulding is characterized in that comprising the following steps:
(1) viscose glue preparation: choosing weight ratio is the wood pulps of Cotton Pulp and the 80-20% of 20-80%, makes viscose glue through alkalization, squeezing, aging, yellow, dissolving, maturation, filtration and deaeration operation, and viscose glue injects film forming device, film former;
(2) desulfurization bleaching: film is carried out desulfurization, bleaching;
(3) film plasticizing: the film after desulfurization, bleaching is immersed in plastifying liquid, plastify 4-10 second under the condition of temperature 50-60 ℃;
(4) dry damping: after the film drying after plasticizing, damping, just make described regenerated cellulose film.
2. the preparation method of the special-purpose regenerated cellulose film of the demoulding as claimed in claim 1, it is characterized in that the mixed solution of described plastifying liquid for being comprised of following raw material: concentration is the aqueous glycerin solution of 60-90g/L, consumption is 80-100kg/ ton film, concentration is the triglycol aqueous solution of 15-25g/L, consumption is 25-35kg/ ton film, concentration is the glycol ether aqueous solution of 15-25g/L, and consumption is 25-35kg/ ton film; Dioxide-containing silica is the silica aqueous solution of 10-15g/L, and consumption is 8-12 kg/ ton film.
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| CN2013100944140A CN103172893A (en) | 2013-03-23 | 2013-03-23 | Preparation method of special de-molding regenerated cellulose membrane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500597A (en) * | 2020-12-11 | 2021-03-16 | 湖北金环新材料科技有限公司 | Preparation method of Lyocell cellulose film |
| CN114873999A (en) * | 2022-04-15 | 2022-08-09 | 常熟佳合显示科技有限公司 | Heat treatment method of ceramic material and demoulding paper for heat treatment of ceramic material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504314A (en) * | 2011-11-07 | 2012-06-20 | 潍坊恒联玻璃纸有限公司 | Method for preparing release regenerated cellulose membrane |
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- 2013-03-23 CN CN2013100944140A patent/CN103172893A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504314A (en) * | 2011-11-07 | 2012-06-20 | 潍坊恒联玻璃纸有限公司 | Method for preparing release regenerated cellulose membrane |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500597A (en) * | 2020-12-11 | 2021-03-16 | 湖北金环新材料科技有限公司 | Preparation method of Lyocell cellulose film |
| CN114873999A (en) * | 2022-04-15 | 2022-08-09 | 常熟佳合显示科技有限公司 | Heat treatment method of ceramic material and demoulding paper for heat treatment of ceramic material |
| CN114873999B (en) * | 2022-04-15 | 2023-10-27 | 常熟佳合显示科技有限公司 | Heat treatment method of ceramic material and release paper for heat treatment of ceramic material |
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Address after: 261199 No. 609 Hailong Road, Hanting District, Shandong, Weifang Applicant after: Weifang Henglian Cellophane Co., Ltd. Address before: 261031 No. 409 East Wolong street, Kuiwei District, Shandong, Weifang Applicant before: Weifang Henglian Cellophane Co., Ltd. |
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Application publication date: 20130626 |