WO2000043594A1 - Procede de fabrication de cellulose synthetique - Google Patents

Procede de fabrication de cellulose synthetique Download PDF

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Publication number
WO2000043594A1
WO2000043594A1 PCT/CN2000/000007 CN0000007W WO0043594A1 WO 2000043594 A1 WO2000043594 A1 WO 2000043594A1 CN 0000007 W CN0000007 W CN 0000007W WO 0043594 A1 WO0043594 A1 WO 0043594A1
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WO
WIPO (PCT)
Prior art keywords
fiber
paper
polyethylene terephthalate
synthetic fiber
synthetic
Prior art date
Application number
PCT/CN2000/000007
Other languages
English (en)
French (fr)
Inventor
Xingli Wang
Shiyi Tao
Original Assignee
Sichuan Foreign Economic Relations & Trade Corporation
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.)
Filing date
Publication date
Application filed by Sichuan Foreign Economic Relations & Trade Corporation filed Critical Sichuan Foreign Economic Relations & Trade Corporation
Priority to AU20906/00A priority Critical patent/AU2090600A/en
Publication of WO2000043594A1 publication Critical patent/WO2000043594A1/zh

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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
    • D21H1/00—Paper; Cardboard
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/26—Polyamides; Polyimides
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • D21H13/20—Organic non-cellulose fibres from macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H13/24—Polyesters
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature
    • Y10T428/24793—Comprising discontinuous or differential impregnation or bond
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/251—Mica
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/268—Monolayer with structurally defined element
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
    • Y10T442/2893—Coated or impregnated polyamide fiber fabric
    • Y10T442/2902—Aromatic polyamide fiber fabric
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials

Definitions

  • the invention relates to a synthetic fiber paper, in particular to a fiber paper made of polyaramid synthetic fiber as a main raw material; the invention also relates to a method for producing the synthetic fiber paper. Background technique
  • Polyaramid synthetic fiber paper is a paper-like material made of polyaramid synthetic fiber as a raw material through a special papermaking process. Because of its high temperature resistance, high strength, low deformation, fire resistance, chemical resistance and excellent insulation properties, it is widely used in high-tech fields such as electromechanical, aerospace, and aerospace. At present, the market name of polyaramid fiber paper is "Nomex Brand Paper", and the fiber used is poly-m-phenylene isophthalamide fiber. The production method of this kind of synthetic fiber paper has not been seen at home and abroad. Report. Summary of the Invention
  • the purpose of the present invention is to provide a synthetic fiber paper made of polyparaphenylene terephthalamide fiber as a raw material.
  • the fiber paper has high temperature resistance, high strength, low deformation, fire resistance, chemical resistance and chemical resistance. Excellent insulation performance.
  • Another object of the present invention is to provide a method for producing synthetic fiber paper using polyparaphenylene terephthalamide fiber as a raw material.
  • the synthetic fiber paper of the present invention contains
  • the above synthetic fiber paper contains by weight
  • the above synthetic fiber paper contains by weight parts:
  • the poly-p-phenylene terephthalamide fiber is a poly-p-phenylene terephthalamide fiber having a fineness of 1.5 to 2.0 D and a length of 4 to 6 m / m, and polyethylene terephthalate.
  • the fat fiber is a polyethylene terephthalate fiber with a fineness of 1.5-2. 0 D and a length of 4 ⁇ 6m / m.
  • Polyparaphenylene terephthalamide fiber (aramid 1414) is a structural fiber, and its structural formula is:
  • P-p-dibenzyl chloride and p-diamine are used as raw materials.
  • P-CaCl solvent and low-temperature polycondensation are used to prepare p-p-dibenzyl biscarboxamide resin. After being twisted by liquid crystal, it is cut to the required length or directly settling. Made of short fibers.
  • the fiber has outstanding high strength (maximum tensile strength 200 CN / betx, shear resistance 0.29, elongation at break 3%), high elastic modulus (up to 67KN / mm 2 ), high heat resistance (Decomposition point 500 Q C), fire resistance, chemical resistance and excellent insulation, so the synthetic fiber paper made of poly-p-phenylene terephthalamide as the main structural fiber also has the outstanding outstanding properties above.
  • the softening point of this fiber is 238 ⁇ 240 Q C
  • the melting point is 255 ⁇ 260 ° C
  • the softening temperature is higher than the use temperature of synthetic fiber paper 220 Q C, and it has higher strength and excellent Electrical insulation.
  • Appropriate addition of polyethylene terephthalamide glycol fibers as bonding fibers will not unduly reduce the physical and mechanical indicators and electrical insulation of synthetic fiber paper.
  • the amount of bonding fiber should be appropriately increased to 40-50 (parts by weight), and the optimal amount is 30 (parts by weight).
  • the filling ratio can be from 0 to 50 (Parts by weight). When the filling amount reaches 50 (parts by weight) (high filling), in addition to the original high strength and high temperature resistance, the product also has the characteristics of mica.
  • the production method of synthetic fiber paper includes batching pulping, forming, dewatering, drying, preheating, prepressing, high-pressure hot rolling, trimming, and the like, which is characterized in that a proportion of untreated aggregates are proportioned before the batching and pulping.
  • the phenylene terephthalamide fiber and polyethylene terephthalate fiber are opened and dissociated, and then blended with the treated part of the polyparaphenylene terephthalamide fiber to make pulp.
  • the ratio of the untreated polyparaben to harmless diamide fiber to the treated polyparaphenylene to stupamide fiber is preferably 1: 1 to 0.2 (weight), more preferably 1: 0. 34 (weight).
  • mica powder and process additives should be mixed and homogenized before batching and pulping.
  • the process additive may be inorganic gel and / or polyoxyethylene.
  • the preheating temperature may be 240 to 250 ° C
  • the preloading pressure may be 1 to 2 MPa
  • the high-pressure hot rolling temperature may be 255 to 265 ° C
  • the line pressure may be 500 to 3000N / Cm.
  • the trace amount of viscous agent remaining in the formed paper blank will give a certain bond to the fibers, so that the paper blank retains an initial strength before being shaped, and will not break during transportation and peeling from the tire cloth, and the papermaking process can be carried out smoothly.
  • the viscous inorganic gel SM and polyoxyethylene P0 used in the present invention can be used alone or in combination, and the amount is about 0.3 to 0.8 ° /. Depending on the viscosity of the viscous agent and the paper type, specifications, and paper machine type, the dosage is adjusted. Generally speaking, the thickness is thinner than the thick one, and the amount of filling is larger than that of no filling.
  • poly (p-phenylene terephthalamide) fiber In order to improve the degree of papermaking, the surface treatment of poly (p-phenylene terephthalamide) fiber is very necessary. The surface properties of the fiber are changed by the treatment, the affinity of the fiber for water is increased, and the fiber is dispersed and suspended in water for a longer time. .
  • a mechanical method or a mechanical and chemical composite method is adopted here. That is, the polyparaphenylene terephthalamide fiber is beaten by a beater, and the shearing and tearing of the fiber by the beater reduces the fiber length and roughens the surface.
  • beating a small amount of process additives can be added to mix beating. This is the so-called mechanical and chemical compound method.
  • two lengths of poly-p-phenylene terephthalamide fiber can also be used in combination (especially suitable for ultra-short fibers directly prepared by the sedimentation method) to achieve the same effect
  • the synthetic fiber paper After the synthetic fiber paper is dried, because the bonding strength between the fibers is weak, the paper fiber is loose, and the mechanical properties are weak, it must be processed by hot rolling to soften the bonding fiber (polyester chopped filament) with a lower melting point. , Melt, bond and shape the fiber network composed of insoluble poly-p-phenylene terephthalamide fiber under pressure, so as to achieve the expected high performance.
  • the paper blank In order to allow the paper blank to have sufficient mechanical strength and to withstand the strong tension during high pressure hot rolling so as not to break, the paper blank should be preheated to a softening point of the bonding fiber by a preheating roller before being fed into the high pressure hot rolling. Prestressing with lower pressure gives the paper blank sufficient mechanical strength.
  • the bonding fibers When there is filling, in order to achieve sufficient bonding of the filler, the bonding fibers should be more melted. Properly increase the hot rolling temperature (265 ° C) 0
  • the filler (mica powder) is mixed with a small amount of process additives and mixed with high-speed process additives to form a slurry before being added to the fiber pulp. This measure can ensure the smooth completion of the process.
  • the preheating and hot rolling temperatures should be accurately controlled at the selected temperature, with an error of ⁇ 1 Q C.
  • Figure 1 is a flow chart of the production process of the present invention.
  • Nie Jia way of implementing the present invention is a flow chart of the production process of the present invention.
  • the synthetic fiber paper of Example 1 was prepared in the following ratio.
  • polyparaphenylene terephthalamide fiber has an untreated fineness of 1.5D and a length of 6m / m of polyparaphenylene terephthalamide fiber 52 kg, and the treated polyparaphenylene terephthalamide fiber Phenamide fiber 18kg.
  • Polyethylene terephthalate fiber is a polyethylene terephthalate fiber with a fineness of 1.5D and a length of 6m / m.
  • Example 1 The production method of Example 1 is:
  • the untreated polyparaphenylene terephthalamide fiber and polyethylene terephthalate fiber were opened and dissociated with the treated polyparaphenylene terephthalamide fiber.
  • the wastewater during dehydration can be recycled after being treated.
  • the compounding ratio of the synthetic fiber paper in the second embodiment is the same as that in the first embodiment.
  • the production method is basically the same as in Example 1, except that the hot rolling pressure during high pressure hot rolling is 1200 N / cm, and an unfilled medium density synthetic fiber paper having a density of 0.5 to 0.9 g / m 3 can be obtained.
  • the compounding ratio of the synthetic fiber paper in the third embodiment is the same as that in the first embodiment.
  • the production method is also basically the same as in Example 1, except that the hot-rolling line pressure during high-pressure hot rolling is 3000 N / cm, and an unfilled high-density synthetic fiber paper having a density of 0.9 to 1.2 g / cm 3 can be obtained.
  • the synthetic fiber paper of Example 4 was prepared according to the following ratio:
  • mice (grain size is 5 ⁇ 1 ⁇ ) lkg
  • the above-mentioned polyparaphenylene terephthalamide fiber has an untreated fineness of 1.5D, a length of 6ra / m of polyparaphenylene terephthalamide fiber, 45 kg, and a treated polyparaphenylene terephthalamide. 20 kg of fiber, polyethylene terephthalate polyethylene terephthalate fiber with a fineness of 1.5D and a length of 4m / m.
  • the production method of this embodiment 4 is basically the same as that of embodiment 1, except that the mica powder, water, and a small amount of process additive-polyoxyethylene are mixed and homogenized before adding the above-mentioned polyparaphenylene p-benzene. 5 MPa; the temperature during high pressure hot rolling during preheating and prepressing at a preheating temperature of 250 ° C and a prepressing pressure of 1.5 MPa; It is 265 Q C, and the linear pressure is 1 500 N / cm.
  • the synthetic fiber paper of Example 5 was prepared in the following proportions:
  • the above-mentioned polyparaphenylene terephthalamide fiber has an untreated polyparaphenylene terephthalamide fiber having a fineness of 1.5D and a length of 6m / m, and 40 kg of treated polyparaphenylene terephthalamide.
  • the fiber is 10kg
  • the polyethylene terephthalate fiber is a polyethylene terephthalate fiber with a fineness of 2.0D and a length of 6m / m.
  • Example 5 The production method of Example 5 is the same as that of Example 4.
  • the synthetic fiber paper of Example 6 was prepared according to the following ratio:
  • mice (grain size 10 ⁇ 15 ⁇ ) 10kg
  • the above-mentioned polyparaphenylene terephthalamide fiber has an untreated polyparaphenylene terephthalamide fiber having a fineness of 2D and a length of 6m / m, and 45 kg of treated polyparaphenylene terephthalamide fiber. 15kg.
  • Polyethylene terephthalate fiber uses polyethylene terephthalate fiber with a fineness of 2D and a length of 6m / m.
  • Production Example 6 of the present embodiment is substantially the same as in Example 4 except that the temperature at the hot rolling at a high pressure of 265 ° C, linear pressure 2000N / cm o
  • the synthetic fiber paper of Example 7 was prepared in the following proportions:
  • mice (grain size 10 ⁇ 20 ⁇ ) 10kg
  • the above-mentioned polyparaphenylene terephthalamide fibers include untreated polyparaphenylene terephthalamide fibers having a fineness of 1.5D and a length of 6m / m, and 40 kg of treated polyparaphenylene terephthalamide fibers The fiber is 20kg, and the polyethylene terephthalate fiber is a polyethylene terephthalate fiber with a fineness of 1.5D and a length of 4m / m.
  • the synthetic fiber paper of Example 8 was prepared in the following proportions:
  • mice (grain size 10 ⁇ 20 ⁇ m) 50kg
  • the above polyparaphenylene terephthalamide fiber has an untreated fineness of 1.5D, a length of 6m / m of polyparaphenylene terephthalamide fiber 30kg, and a treated polyparaphenylene terephthalamide fiber. 20 kg of amide fiber, polyethylene terephthalate fibers, polyethylene terephthalate fibers with a fineness of 1. 5D and a length of 5 m / ra.
  • the synthetic fiber paper of Example 9 was prepared in the following proportions:
  • the above-mentioned polyparaphenylene terephthalamide fiber fineness is 1. 5D, and the length is 6m / m, and the polyethylene terephthalate fiber fineness is 1. 5D, and the length is 1 ⁇ 2 / m.
  • the production method is basically the same as that in Example 3, except that the beating treatment is performed before the batching.
  • the synthetic fiber paper is a new variety of high-performance synthetic materials. It uses polyaramid synthetic fiber as the main raw material and is made into a paper-like material through a special papermaking process.
  • High temperature resistance (suitable for-190 ⁇ 310 Q C, can be used for a long time below 220 ° C), high strength, low deformation, fire resistance, flame resistance, chemical resistance and excellent electrical insulation properties.
  • It can be made into low-density, medium-density, and high-density synthetic fiber paper by changing the properties, blending ratio, and hot-rolling pressure of the fiber appropriately. According to the proportion of the filler added, it can be made into non-filling, low filling, high filling, etc. model. And can be made into different thickness (0.05 to 10mm, thickness above 1.
  • Om / m is called fiberboard), different width specifications, forming a variety of models, specifications product series, suitable for different technical application areas .
  • the synthetic fiber paper can be widely used as an insulating material in the fields of electromechanical, aviation, aerospace, national defense, military high-tech, high-voltage equipment, and high-temperature environments, and is also often used as a structural material in composite materials for special purposes.
  • the synthetic fiber paper of the present invention is not limited to the above embodiments.
  • the proportion and hot rolling process parameters of the special synthetic fiber paper can be changed according to the reference ratio and the hot rolling process parameters to the physical and mechanical indicators of the special synthetic fiber paper.
  • Product models and specifications; Those skilled in the art can also make various changes and modifications, all of which fall within the scope of the present invention without departing from the spirit of the present invention.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Description

合成纤维纸及其生产方法 技术领域
本发明涉及一种合成纤维纸， 特别涉及一种以聚芳酰胺合成纤维为主体原料 制成的纤维纸； 本发明还涉及该种合成纤维纸的生产方法。 背景技术
聚芳酰胺合成纤维纸是以聚芳酰胺合成纤维为原料， 经特殊抄造工艺制成的 纸状材料。 因其耐高温、 高强度、 低变形、 耐火阻燃、 耐化学腐蚀及优良的绝缘 性能而广泛用于机电、 航空、 航天等高技术领域。 目前， 市场上销售的聚芳酰胺 纤维纸， 其商品名称为 "Nomex Brand Paper " , 所用的纤维为聚间苯撑间苯二曱 酰胺纤维， 该种合成纤维纸的生产方法在国内外尚未见报道。 发明内容
本发明的目的是提供一种以聚对苯撑对苯二曱酰胺纤维为原料制成的合成纤 维纸， 该种纤维纸具有耐高温、 高强度、 低变形、 耐火阻燃、 耐化学腐蚀及优良 的绝缘性能。
本发明的另一个目的是提供以聚对苯撑对苯二甲酰胺纤维为原料生产合成纤 维纸的方法。
本发明合成纤维紙按重量份含有
聚对苯撑对笨二曱酰胺纤维 50 ~ 80
聚对笨二甲酸乙二醇脂纤维 20 ~ 50
云母粉 0 ~ 50
上述的合成纤维纸按重量份含有
聚对苯撑对笨二曱酰胺纤维 70 ~ 80 聚对苯二曱酸乙二醇脂纤维 20 ~ 30
用以上配比可生产出无充填合成纤维纸。
上述的合成纤维纸按重量份含有：
聚对苯撑对苯二曱酰胺纤维 60 ~ 70
聚对苯二曱酸乙二醇脂纤维 30 ~ 40
云母粉 0 ~ 10
用以上配比可生产出低充填合成纤维纸。 云母粉釆用 5 ~ 20μπι效果最佳。 上述的合成纤维纸按重量份含有：
聚对苯撑对苯二曱酰胺纤维 50 ~ 60
聚对笨二曱酸乙二醇脂纤维 40 ~ 50
云母粉 10 ~ 50
用以上配比可生产出高充填合成纤维纸。
所述的聚对苯撑对苯二曱酰胺纤维采用纤度 1. 5 ~ 2. 0 D、 长度 4 - 6m/m 的 聚对苯撑对苯二曱酰胺纤维， 聚对苯二甲酸乙二醇脂纤维采用纤度 1. 5 - 2. 0 D 长度 4 ~ 6m/m的聚对苯二甲酸乙二醇脂纤维。
聚对苯撑对苯二甲酰胺纤维（芳纶 1414)为结构纤维， 其结构式为：
Figure imgf000004_0001
0 0
以对笨二曱酰氯和笨二胺为原料， 以 匪 P-CaCl 溶剂、 低温缩聚制得对笨撑对 笨二甲酰胺树脂， 经液晶纺绞， 切短至所需长度或用沉降法直接制成短纤维。 该 纤维具有突出的高强度（最大抗张强度 200 CN/betx, 抗剪切率 0. 29、 断裂伸长 率 3% ), 高弹性模量（可达 67KN/mm2 )， 高耐热性（分解点 500QC ), 耐火阻燃， 耐化学腐蚀和优良的绝缘性， 故而以聚对苯撑对苯二曱酰胺为主体结构纤维制成 的合成纤维紙也具有以上突出的优良性能。
由于合成纤维之间没有足够的结合力， 不能如植物纤维那样抄造成型， 合成 纤维之间的结合主要是靠纤维熔融粘接， 而聚苯撑对笨二曱酰胺纤维没有明显的 熔点， 因此必须加入一定比例熔点较低的纤维作为粘接纤维， 当合成纤维纸坯在 接近粘接纤维熔点时轧压， 已软化熔融的粘接纤维在压力下将不熔的聚对苯撑对 笨二甲酰胺纤维粘合成网络状达到定型的目的。 本发明选用聚对笨二曱酰胺乙二 醇酯纤维（涤纶）为粘接纤维， 结构式：
- [CH2CH2C00 <Q> C] n - ,该纤维的软化点 238 ~ 240QC， 熔点 255 ~ 260°C , 软化温度高于合成纤维纸使用温度 220QC , 而且有较高强度， 优良的电绝缘性， 适当地加入聚对苯二曱酰胺乙二醇脂纤维作粘接纤 维， 不会过度降低合成纤维纸的物理机械指标和电绝缘性。 当有充填 时， 粘接纤维用量应适当增加至 40 - 50 (重量份）， 最佳用量 30 (重 量份）。
当合成纤维紙用于高电压、 频繁或连续电暈放电场所时， 需加入云母粉混合 抄纸，经云母粉充填的产品耐电暈放电性得到加强，充填比例按用途可以从 0 ~ 50 (重量份）。 当充填量达到 50 (重量份）（高充填）时， 产品除具有原有的强度高、 耐高温等特性外， 还兼具云母的特性。
合成纤维纸的生产方法， 包括配料制浆， 抄造成形， 脱水， 干燥， 预热， 预 压， 高压热轧， 切边整形， 其特征在于配料制浆前按比例将部分未经处理的聚对 苯撑对苯二甲酰胺纤维、 聚对苯二曱酸乙二醇酯纤维进行纤维开松离解， 然后与 经处理的部分聚对笨撑对苯二曱酰胺纤维进行配料制浆。
所述未经处理的聚对笨撑对笨二曱酰胺纤维与经过处理的聚对苯撑对笨二曱 酰胺纤维的比例优选为 1: 1 ~ 0. 2 (重量）， 更优选为 1: 0. 34 (重量）。
所述生产方法中， 配料制浆前还应将云母粉和工艺添加剂混合均质， 然后进 行配料制浆。
所述工艺添加剂可以采用无机凝胶和 /或聚氧乙稀。
所述生产方法中， 预热温度可以为 240 ~ 250°C , 预压压力可以为 1 ~ 2兆帕， 高压热轧温度可以为 255 ~ 265 °C， 线压力可以为 500 ~ 3000N/Cm。 本发明合成纤维纸的生产方法中， 为了改善纤维在水中的分散性， 在混合制 浆时加入微量高粘性物质， 使浆液具有一定的粘稠性， 增加纤维在浆液中运动的 阻力， 延緩纤维的缠绕、 絮集、 使纤维在浆液中的悬浮分散得到改进， 从而达到 提高合成纤维纸匀度的目的。
抄造成形的纸坯中残留的微量粘稠剂， 给纤维一定的粘结， 使纸坯在定形前 保留一初始强度， 在传送和与胎布剥离时不至破裂， 抄造过程才得以顺利进行。
本发明采用的粘稠剂无机凝胶 SM、 聚氧乙烯 P0可以单独使用， 也可以复合 使用， 用量约 0. 3 ~ 0. 8°/。， 视粘稠剂的粘度和纸的型号、 规格、 抄纸机类型调整 用量， 一般而言， 厚度薄的比厚的适当大些， 有充填比无充填用量大。
为了提高抄造纸坯勾度， 聚对苯撑对苯二曱酰胺纤维进行表面处理是十分必 要的， 通过处理改变纤维的表面性状， 增加纤维对水的亲和力， 使纤维在水中分 散悬浮时间更长。 聚对苯撑对苯二曱酰胺纤维的处理方法有多种， 此处采用机械 法或机械与化学复合的方法。 即将聚对苯撑对苯二曱酰胺纤维经打浆机打浆， 通 过打浆机对纤维的剪切、 撕裂作用使纤维长度降低， 表面粗化。 打浆时可以加入 微量工艺添加剂混合打浆， 这就是所谓的机械与化学复合法。 在实际生产中也可 以采用两种长度的聚对苯撑对苯二曱酰胺纤维配合使用 （特别适用于沉降法直接 制得的超短纤维）可以达到相同的效果。
针对合成纸既要有较好的抗张强度、 伸长率、 紧度， 又要有较高的撕裂度和 边撕裂度， 同时要有最好的抄造匀度的特点， 为了解决撕裂度和抗张强度对纤维 长度要求的矛盾， 本发明以一定量未经处理的聚对苯撑对苯二曱酰胺纤维（较长 纤维）为纸坯骨架， 参配部分经过处理的聚对笨撑对笨二曱酰胺纤维（较短紆维） 充填于未经处理的聚对苯撑对苯二曱酰胺纤维骨架之间， 长短纤维交织更趋均 匀， 从而提高紙坯抄造勾度和纤维之间交叉密度。 表 1两种聚对苯撑对笨二曱酰胺纤维参配比例对纸坯物理机械性能的影响 未经处理纤维 纸坯紧度 撕裂度指数 边撕裂度指数 抗张力指数 过处理纤维 g/cm3 CN . mVg N - m2/g N - m/g
1: 1 0. 19 2. 48 0. 44 27. 7
1: 0. 34 0. 20 3. 75 0. 61 20. 7
1: 0. 2 0. 21 5. 21 0. 73 9. 24 从表 1 中看出， 撕裂度和边撕裂度随经处理纤维用量增加而增加， 抗张强度 则随未经处理纤维用量增加而降低。 当两种聚对苯撑对苯二曱酰胺纤维配比在
1: 0. 34时比较适量， 各方面的性能都得到满意的照顾。 当用途不同， 对纸的撕裂 度和抗张强度提出特殊要求时， 可按表 1提示的关系改变两种聚对苯撑对苯二曱 酰胺纤维的配比， 即可制造出满意的产品。
本合成纤维纸干燥后的纸坯， 因纤维之间结合力较弱， 纸坯纤维疏松， 机械 性能弱， 必须进行热轧定形处理， 使熔点较低的粘接纤维（涤纶短切丝）软化、 熔融， 在压力下将不熔的聚对苯撑对苯二曱酰胺纤维构成的纤维网络粘接定形 , 使之达到预期的高性能。
为了让纸坯有足够的机械强度， 能承受高压热轧时的强大张力不至断裂， 纸 坯在送入高压热轧前应将纸坯通过预热辊预热至粘接纤维软化点， 并施以较低压 力预压， 使纸坯产生足够的机械强度。
表 2 热轧温度与压力
Figure imgf000007_0001
热轧压力愈高， 合成纸密度（紧度）越大， 通过变换轧辊压力 （线压）， 可 以得密度（紧度） 不同的型号产品。
当有充填时， 为了使填充剂达到充分粘合， 应使粘合纤维更多熔融， 此时要 适当提高热轧温度 ( 265°C )0
充填剂 （云母粉）在配入纤维纸浆前与微量工艺添加剂一起进行高速均质搅 拌制成料浆再加入， 该措施可以保证工艺过程顺利完成。
为了不让粘合纤维过度熔融， 进而影响合成纤维纸的技术性能， 预热和热轧 温度应精确控制在已选定的温度， 误差 ±1QC。
由于纸坯导热系数较低， 热传导较慢， 合成纤维纸的厚度愈大， 预热时间愈 长。 附图的简要说明
图 1为本发明生产工艺流程图。 实现本发明的聂佳方式
下面通过对本发明实施例的描述， 详细说明本发明：
实施例 1 :
按下述比例配制本实施例 1合成纤维纸。
聚对苯撑对笨二曱酰胺纤维 7 Okg
聚对笨二曱酸乙二醇脂纤维 3 Okg
上述的聚对笨撑对苯二曱酰胺纤维中有未经处理的纤度 1. 5D、 长度 6m/m的 聚对笨撑对笨二曱酰胺纤维 52kg , 经过处理的聚对苯撑对苯二曱酰胺纤维 18kg。 聚对苯二曱酸乙二醇脂纤维为纤度 1. 5D、 长度 6m/m的聚对苯二曱酸乙二醇脂纤 维。
实施例 1的生产方法是：
参见图 1 , 将未经处理的聚对笨撑对笨二曱酰胺纤维和聚对笨二甲酸乙二醇 脂纤维进行开松离解后与经过处理的聚对苯撑对苯二曱酰胺纤维配料制浆， 抄造 成型， 脱水， 干燥， 在温度为 245QC、 预压压力为 2 兆帕下预热、 预压， 在线压 力 600N/cm、 温度 260°C 下热轧， 便得到密度为 0. 3 ~ 0. 5g/cm3的无充填低密度 合成纤维纸； 然后进行切边整形、 收卷， 便得成品。 在脱水时的废水通过处理后 可循环利用。
实施例 2 :
本实施例 2合成纤维纸的配比与实施例 1同。生产方法也基本与实施例 1同， 不同处是高压热轧时热轧压力为 1200N/cm, 可制得密度为 0. 5 ~ 0. 9g/m3的无充 填中密度合成纤维纸。
实施例 3:
本实施例 3合成纤维纸的配比与实施例 1同。生产方法也基本与实施例 1同， 不同处是高压热轧时热轧线压力为 3000N/cm， 可制得密度为 0. 9 ~ 1. 2g/cm3的无 充填高密度合成纤维纸。
实施例 4 :
按下述比例配制本实施例 4合成纤维纸：
聚对苯撑对苯二甲酰胺纤维 65kg
聚对苯二甲酸乙二醇脂纤维 30kg
云母粉（粒度为 5 ~ 1 Ομηι ) lkg
上述聚对苯撑对苯二曱酰胺纤维中有未经处理纤度 1. 5D、 长度 6ra/m的聚对 苯撑对苯二曱酰胺纤维 45kg和经过处理的聚对苯撑对苯二曱酰胺纤维 20kg , 聚 对苯二曱酸乙二醇脂纤维采用纤度 1. 5D、 长度 4m/m聚对苯二曱酸乙二醇脂纤维。
本实施例 4的生产方法基本与实施例 1同，不同处是在配料制浆前将云母粉、 水、 和微量工艺添加剂 - -聚氧乙烯混合均质后再加入上述聚对苯撑对苯二曱酰 胺纤维和聚对笨二曱酸乙二醇脂纤维中配料制浆； 在预热预压时预热温度 250°C , 预压压力为 1. 5兆帕； 在高压热轧时温度为 265QC， 线压力为 15 00N/cm。
实施例 5 :
按下述比例配制本实施例 5合成纤维纸：
聚对笨撑对笨二曱酰胺纤维 50kg
聚对苯二曱酸乙二醇脂纤维 50kg 云母粉（粒度为 5 ~ 1 Ομπι ) 50kg
上述聚对苯撑对苯二曱酰胺纤维中有未经处理的纤度 1.5D、 长度 6m/m的聚 对苯撑对苯二甲酰胺纤维 40kg, 经过处理的聚对苯撑对苯二甲酰胺纤维 10kg, 聚对苯二曱酸乙二醇脂纤维采用纤度 2.0D、 长度 6m/m的聚对苯二曱酸乙二醇脂 纤维。
实施例 5的生产方法与实施例 4同。
实施例 6:
按下述比例配制本实施例 6合成纤维纸：
聚对苯撑对苯二甲酰胺纤维 60kg
聚对苯二曱酸乙二醇脂纤维 40kg
云母粉（粒度为 10~ 15μτη) 10kg
上述聚对苯撑对笨二曱酰胺纤维中有未经处理的纤度 2D、 长度 6m/m的聚对 苯撑对苯二曱酰胺纤维 45kg， 经过处理的聚对苯撑对苯二曱酰胺纤维 15kg。 聚 对苯二曱酸乙二醇脂纤维采用纤度 2D、 长度 6m/m聚对苯二曱酸乙二醇脂纤维。
本实施例 6 的生产方法基本与实施例 4 同， 不同处是在高压热轧时温度为 265°C, 线压力为 2000N/cmo
实施例 7:
按下述比例配制本实施例 7合成纤维纸：
聚对苯撑对笨二曱酰胺纤维 60kg
聚对苯二曱酸乙二醇脂纤维 40kg
云母粉（粒度为 10~ 20μιη) 10kg
上述聚对笨撑对苯二甲酰胺纤维中有未经处理的纤度 1.5D、 长度 6m/m的聚 对苯撑对苯二曱酰胺纤维 40kg和经过处理的聚对笨撑对苯二曱酰胺纤维 20kg, 聚对笨二曱酸乙二醇脂纤维采用纤度 1.5D、 长度 4m/m聚对笨二曱酸乙二醇脂纤 维。
本实施例 7的生产方法基本与实施例 6同。 实施例 8 :
按下述比例配制本实施例 8合成纤维纸：
聚对苯撑对苯二甲酰胺纤维 5 Okg
聚对苯二曱酸乙二醇脂纤维 5 Okg
云母粉（粒度为 10 ~ 20μιιι ) 50kg
上述聚对苯撑对笨二曱酰胺纤维中有未经处理的纤度 1. 5D、 长度 6m/m的聚 对苯撑对苯二曱酰胺纤维 30kg和经过处理的聚对苯撑对苯二曱酰胺纤维 20kg , 聚对苯二曱酸乙二醇脂纤维釆用纤度 1. 5D、 长度 5m/ra的聚对苯二曱酸乙二醇脂 纤维。
本实施例 8的生产方法基本与实施例 6同。
实施例 9 :
按下述比例配制本实施例 9合成纤维纸：
聚对苯撑对苯二甲酰胺纤维 50kg
聚对苯二曱酸乙二醇脂纤维 5 Okg
上述聚对苯撑对笨二曱酰胺纤维纤度 1. 5D、 长度 6m/m， 聚对苯二曱酸乙二 醇脂纤维纤度 1. 5D、 长度 ½/m。 生产方法与实施例 3基本相同， 不同处为配料 前进行打浆处理。 工业应用性
本发明合成纤维纸系高性能合成材料新品种。 它是以聚芳酰胺合成纤维为主 体原料， 经特殊抄造工艺制成纸状材料。 耐高温 （适用于- 190 ~ 310QC , 220°C 以下可长时间使用） ，高强度， 低变形， 耐火阻燃， 耐化学腐蚀及优良的电绝缘 特性。 居用途适当改变纤维的性状、 配比和热轧压力， 可制成低密度、 中密度、 高密度的合成纤维纸， 按加入填充剂的比例， 可制成无充填， 低充填、 高充填等 型号。 并可制成不同厚度（ 0. 05 ~ 10mm， 厚度在 1. Om/m以上的称为纤维纸板）、 不同幅宽规格， 形成多种型号、 规格的产品系列， 以适用于不同技术应用领域。 本发明合成纤维纸可广泛用于机电、 航空、 航天、 国防军工、 民用高新技术领域、 高压电设备、 高温环境中作绝缘材料， 也常用于特殊用途的复合材料中作结构材 料。
本发明合成纤维纸不限于以上实施方式， 可依据参配比例和热轧工艺参数与 特种合成纤维纸物理机械指标的依存关系， 改变配比和热轧工艺参数， 制成可满 足用户特殊要求的产品型号和规格； 本领域技术人员还可以做出各种改变和变 形， 在不脱离本发明精神的前提下， 均落在本发明的范围内。

Claims

权利要求 1. 一种合成纤维纸，
其特征在于 所述合成纤维纸按重量份含有：
聚对冬撑对苯二曱酰胺纤维 so ~ so
聚对苯二甲酸乙二醇脂纤维 20 ~ 50
云母粉 0 ~ 50
2.根据权利要求 1所述的合成纤维紙，
其特征在于 所述合成纤维纸按重量份含有：
聚对苯撑对苯二曱酰胺纤维 70 ~ 80
聚对苯二曱酸乙二醇脂纤维 20 ~ 30
3.根据权利要求 1所述的合成纤维纸，
其特征在于 所述合成纤维纸按重量份含有：
聚对苯撑对苯二甲酰胺纤维 60 ~ 70
聚对苯二甲酸乙二醇脂纤维 30 ~ 40
云母粉 0 - 10
4.根据权利要求 1所述的合成纤维纸，
其特征在于 所述合成纤维纸按重量份含有：
聚对苯撑对苯二曱酰胺纤维 50 ~ 60
聚对苯二曱酸乙二醇脂纤维 · 40 ~ 50
云母粉 10 ~ 50
5.根据权利要求 1― 4所述的合成纤维纸，
其特征在干 所述聚对苯撑对笨二曱酰胺采用纤度 1.5-2.0D、 长度 4~6m/m 的聚对苯撑对笨二曱酰胺纤维， 所述聚对笨二甲酸乙二醇脂纤维采用纤度 1.5- 2.0D、 长度 4 ~ 6m/m的聚对笨二曱酸乙二醇脂纤维。
6.合成纤维纸的生产方法， 包括配料制浆， 抄造成形， 脱水， 干燥， 预热， 预压， 高压热轧， 切边整形，
其特征在于 在所述配料制浆前按比例将部分未经处理的聚对苯撑对苯 二曱酰胺纤维、 聚对苯二曱酸乙二醇酯纤维进行纤维开松离解， 然后与经处 理的部分聚对苯撑对苯二曱酰胺纤维进行配料制浆。
7.根据权利要求 6所述的生产方法，
其特征在于 未经处理的聚对苯撑对苯二曱酰胺纤维与经过处理的聚对 苯撑对苯二曱酰胺纤维的比例为 1: 1 ~ 0. 2 (重量）。
8.根据权利要求 7所述的生产方法，
其特征在于 未经处理的聚对苯撑对苯二甲酰胺纤维与经过处理的聚对 苯撑对苯二曱酰胺纤维的比例为 1: 0. 34 (重量）。
9.根据权利要求 6所述的生产方法，
其特征在于 配料制浆前， 还应将云母粉和工艺添加剂混合均质然后进 行配料制浆。
10. 根据权利要求 9所述的生产方法，
其特征在于 所述工艺添加剂采用无机凝胶和 /或聚氧乙晞。
11. 根据权利要求 6 ~ 10所述的生产方法，
其特征在于 所述预热的温度为 240 ~ 250°C , 所述预压的压力为 1 ~ 2 兆帕， 所述高压热轧的温度为 255 ~ 265。C, 线压力为 500 - 3000N/cm。
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US6458244B1 (en) 2002-10-01
ITMI20000075A0 (it) 2000-01-21
DE10003724B4 (de) 2008-03-27
FR2795752B1 (fr) 2002-07-05
JP2000220091A (ja) 2000-08-08
KR20010112858A (ko) 2001-12-22
DE10003724B9 (de) 2008-07-17
DE10003724A1 (de) 2000-08-17
KR100560899B1 (ko) 2006-03-13
ITMI20000075A1 (it) 2001-07-21
US20030051838A1 (en) 2003-03-20
GB2347437A (en) 2000-09-06
FR2795752A1 (fr) 2001-01-05
GB2347437B (en) 2003-08-20
IT1316294B1 (it) 2003-04-10
AU2090600A (en) 2000-08-07
US6551456B2 (en) 2003-04-22
GB0001453D0 (en) 2000-03-08
CN1078645C (zh) 2002-01-30

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