WO2016190694A4 - 아라미드 페이퍼, 그의 제조방법 및 용도 - Google Patents
아라미드 페이퍼, 그의 제조방법 및 용도 Download PDFInfo
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- WO2016190694A4 WO2016190694A4 PCT/KR2016/005608 KR2016005608W WO2016190694A4 WO 2016190694 A4 WO2016190694 A4 WO 2016190694A4 KR 2016005608 W KR2016005608 W KR 2016005608W WO 2016190694 A4 WO2016190694 A4 WO 2016190694A4
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- Prior art keywords
- aramid
- paper
- pulp
- weight
- length
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Classifications
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- 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
- H01B3/52—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials wood; paper; press board
Definitions
- the present invention relates to an aramid paper, a production method thereof and a use thereof.
- the present invention relates to an aramid paper for honeycomb, which is produced by mixing aramid flock with aramid pulp at a certain ratio of aramid pulp having a fiber length of not less than a predetermined length and a fibril development of not less than a certain level, and a method of producing the same.
- the present invention relates to a method for producing aramid pulp, which comprises a step of mixing aramid pulp with a certain ratio of aramid pulp having a fiber length of not more than a predetermined length, a development of fibrils of not less than a certain rate,
- the present invention relates to a wholly aromatic aramid paper for electric insulation and a method of manufacturing the same.
- the present invention also relates to a laminated aramid paper laminated by calendering an aramid paper excellent in adhesion to aramid paper having excellent intelligence, and having a uniform thermal expansion coefficient, electrical conductivity and thermal conductivity, and a method for producing the laminated aramid paper. More specifically, a second mixture containing an aramid flour excellent in adhesion and an aramid pulp containing at least 20% by weight fine powder is coated on a base paper having excellent intelligibility and made of a first mixture containing aramid flour and aramid pulp, And a method for producing the laminated aramid paper.
- Typical applications of industrial paper include honeycomb, electric insulating paper, separator, filter and the like.
- As the physical properties of such industrial paper electrical insulation, mechanical properties, lightness, uniformity and porosity
- Honeycomb which is typically an industrial paper using aramid fibers, is manufactured using aramid paper containing a binder or resin coating on para-aramid fibers, pulp and other fibrous materials, and is used in the manufacture of such aramid paper
- aramid paper containing a binder or resin coating on para-aramid fibers, pulp and other fibrous materials
- US6551456B describes that a polyester fiber is used as a binder of aramid pulp to prepare a porous paper, and that such paper can improve the impregnation property of the thermosetting structural resin.
- KR2009-0091811A discloses a technique for producing aramid paper using thermoplastic fibers having a melting temperature exceeding a curing temperature of a matrix resin and a glass transition temperature of more than 100 ° C as a binder.
- a typical example of a technique for producing a honeycomb paper through resin coating is disclosed in Korea Patent Publication No. KR2010-0094543A, a technique of producing a paper for honeycomb using meta-aramid fibrids with a coating agent such as phenol, polyimide or epoxy .
- the aramid paper for honeycomb according to the conventional manufacturing technique has a constitution for a binder made of thermoplastic fiber or resin which is essentially stronger than aramid pulp or fibrid, in addition to aramid pulp or fibrid, the mechanical properties of the paper are degraded or the porosity is reduced There is a difficulty in lighter weight, and there is no concrete technique for eliminating defective transfer of paper, unevenness in strength, and cohesion between flocs.
- electric insulating paper used for cellular phones, high-voltage cables, and the like is required to have an additional predetermined heat resistance according to each application, and has an excellent electrical insulating property and an insulating sheet having heat resistance, which is an aromatic polyamide (aramid) Background Art [0002]
- aramid aromatic polyamide
- Korean Patent Publication No. 02014-0040096A discloses that 40 to 100% by weight of para-aramid film type fibrids prepared through a specific jet spin process other than aramid pulp and inorganic filler
- Korean Unexamined Patent Publication No. KR2014-0038935A discloses a technique for producing an electric insulating paper using aramid fibrids or pulp with aramid microfilaments and non-resin type binders.
- the electric insulating paper according to the conventional manufacturing technique has a constitution for a binder such as thermoplastic fiber or inorganic filler which is essentially lower than aramid pulp or fibrid and is stronger than aramid.
- a binder such as thermoplastic fiber or inorganic filler which is essentially lower than aramid pulp or fibrid and is stronger than aramid.
- the aramid paper according to the conventional manufacturing technique has a constitution in addition to the aramid pulp or the fibrid for the binder such as thermoplastic fiber or inorganic filler which is essentially lower in strength than the aramid, so that the difference in thermal expansion coefficient, electrical conductivity, It is difficult to apply it to materials and parts requiring precision, and it also has a disadvantage in that it is difficult to apply to a material or a part requiring precision, and it also uses a aramid short fiber to solve the defective conveyance of paper, unevenness of strength and cohesion between flocs, But does not provide a specific technique for producing paper that can be applied to the field.
- the present invention has been made to overcome the above problems, and it is an object of the present invention to provide a honeycomb improved in physical properties through improvement of physical properties of aramid paper and a method of manufacturing the honeycomb.
- Another aspect of the present invention is to provide an aramid paper for honeycomb in which aramid flakes and aramid pulp are mixed at a certain ratio.
- Another aspect of the present invention is to provide a method for producing an aramid paper for honeycomb which comprises blending aramid flakes with aramid pulp at a certain ratio of aramid pulp having a fiber length of not less than a predetermined length and a fibril development of not less than a certain level.
- Another aspect of the present invention is to provide an aramid paper for honeycomb which solves the problem of conveyance failure of paper, unevenness of strength, and cohesion between flocs, and a method for producing the same.
- Another aspect of the present invention is to provide a wholly aromatic aramid paper for electrical insulation having uniform electrical insulation characteristics through improvement of the paper of an aramid paper base, and a method of manufacturing the same.
- Another aspect of the present invention is to provide a wholly aromatic aramid paper for electrical insulation, which is a blend of a certain length of aramid flock, a certain length of fibril, a certain degree of fibril development and a certain percentage of finely divided powder, .
- Another aspect of the present invention is to provide a wholly aromatic aramid paper for electrical insulating paper which solves problems of conveyance failure of paper, unevenness of strength, and cohesion between flocs, and a method for producing the same.
- Another aspect of the present invention is to provide a laminated aramid paper having uniform thermal expansion coefficient, electrical conductivity and thermal conductivity by laminating an aramid paper excellent in adhesion to aramid paper with calendering and a manufacturing method thereof.
- Another aspect of the present invention is to provide a laminated aramid paper excellent in consistency of aramid pulp and aramid pulp, which is obtained by calendering an aramid pulp containing fine powder of a certain proportion or more on a paper having superior intelligence and a method for producing the laminated aramid paper.
- Another aspect of the present invention is to provide an aramid paper having different characteristics of different physical properties by using only aramid short fibers which do not use a binder such as a polymer or a resin, through thermal lamination using calendering, A laminated aramid paper having uniform thermal conductivity and a method for producing the laminated aramid paper.
- the aramid paper according to the present invention comprises aramid flock and a first mixture comprising aramid pulp and aramid pulp having a length of 0.5 to 0.8 mm and a fineness of 150 to 250 ml; And calendering by applying a second mixture comprising aramid flakes and aramid pulp containing at least 20% by weight of fine powder to at least one of the top or bottom of the paper.
- the first mixture may contain 20 to 40% by weight of aramid flock and 60 to 80% by weight of aramid pulp.
- the aramid pulp containing 20% by weight or more of fine particles may be prepared by mixing 10 to 20% by weight of a flock having a length of 3 mm or more and less than 6 mm and 80 to 90% by weight of a flock of 6 mm or more and 8 mm or less with a refiner It can be manufactured by confusing it with a beating machine.
- the method for producing an aramid paper according to the present invention comprises the steps of: forming a base paper with a first mixture of aramid flakes and aramid pulp having a length of 0.5 to 0.8 mm and a fineness of 150 to 250 ml; Applying a second mixture of aramid pulp and aramid pulp containing at least 20% by weight of fine powder onto the bubble paper; And a calendering step of combining the bubble and the applied second mixture.
- the foam may be prepared by blending a first mixture comprising 20 to 40% by weight of an aramid flour and 60 to 80% by weight of an aramid pulp.
- the aramid pulp containing 20% by weight or more of fine particles may be prepared by mixing 10 to 20% by weight of a flock having a length of 3 mm or more and less than 6 mm and 80 to 90% by weight of a flock of 6 mm or more and 8 mm or less with a refiner It can be manufactured by confusing it with a beating machine.
- honeycomb raw paper Since the physical properties of honeycomb are due to the physical properties of the raw paper, the strength of the honeycomb must be strong.
- honeycomb raw paper using conventional aramid short fibers has a constitution for a binder made of thermoplastic fibers or resin which is essentially lower in strength than aramid pulp, flake, or fibrid than aramid, the mechanical properties of the paper are deteriorated or the porosity
- weight reduction due to the decrease in the weight of the paper, and it does not provide a concrete technique for eliminating unevenness of strength and unevenness of cohesion between flocs.
- aramid paper in which strength of paper is improved without using additional binder by using para aramid pulp, especially pulp having a long fiber length and fibril developed with aramid flock, / RTI >
- the physical properties of the electrical insulating paper should be excellent for uniform electrical insulation than the strength of the paper.
- conventional electric insulating paper using aramid short fibers has a constitution for a binder such as thermoplastic fiber or inorganic filler which is essentially stronger than aramid pulp or fibrid and is stronger than aramid pulp or fibrid.
- thermoplastic fiber or inorganic filler which is essentially stronger than aramid pulp or fibrid and is stronger than aramid pulp or fibrid.
- aramid pulp having a certain length of fiber length, a certain degree of fibril development and a certain amount of fine particle content is used at a certain ratio in addition to para-aramid flock for the uniform electrical insulation of electric insulating paper,
- a wholly aromatic aramid paper for electrical insulation which is capable of imparting uniform electrical insulation of a paper sheet without having to use it, and a method of manufacturing the same.
- Conventional artificial paper using aramid short fibers has a constitution for a binder composed of thermoplastic fibers or resin which is essentially stronger than aramid pulp, flake, or fibrid, in addition to aramid pulp. Therefore, the mechanical property of the paper is deteriorated or the porosity There is a disadvantage of weight reduction as well as a specific technology for eliminating unevenness of strength and unevenness of cohesion between flocs. Also, when aramid paper having excellent strength is produced by using pulp having a long fiber length, comparatively porosity is increased and the coarseness is decreased.
- the present invention uses aramid paper having excellent intellect strength as a bubble paper to apply a pulp having a short fiber length and a large amount of fine powder, and then filling a plurality of pores with calendering through calendering, An aramid paper and a method for producing the aramid paper are provided.
- the present invention it is possible not only to improve the mechanical properties of the aramid paper raw material for honeycomb, but also to improve the structure by improving the structure of the honeycomb according to the improvement of the porosity, as well as to improve the easiness of conveying of paper, uniformity of strength and cohesion between flocs.
- the wholly aromatic aramid paper for electric insulation according to the present invention has superior paper synthesis and improves uniformity of electrical insulation characteristics, mechanical properties and improvement of the structure of the paper as well as lightness, easiness of transferring paper and uniformity of strength And the problem of flocculation between the flocs can be solved.
- the laminated aramid paper according to the present invention is composed of only aramid short fibers without the presence of a binder such as a polymer or a synthetic resin, it can be applied to a material or a part requiring a precision difference in physical properties such as thermal expansion coefficient, electrical conductivity and thermal conductivity In addition, it can be applied to honeycomb, electric insulating paper, PCB substrate and the like in the production of aramid paper by the method of the present invention. In the case of defective conveyance of paper, unevenness of strength, There is also an advantage that can be solved.
- the aramid paper for honeycomb according to the present invention may comprise a mixture of aramid flock and aramid pulp.
- the mixture may contain 20 to 40% by weight of the aramid flock and 60 to 80% by weight of the aramid pulp.
- the length of the aramid flake is 4 mm to 8 mm
- the length of the aramid pulp is 0.5 mm to 0.8 mm
- the aramid pulp has a fineness of 150 to 250 ml.
- a method for manufacturing an aramid paper for honeycomb according to the present invention comprises: preparing an aramid flock; Preparing an aramid pulp; Mixing the aramid flour and the aramid pulp at a ratio of 20:80 to 40:60 to prepare a feedstock; And a raw paper forming step of forming the paper stock as raw paper.
- the length of the aramid flake is 4 mm to 8 mm
- the length of the aramid pulp is 0.5 mm to 0.8 mm
- the aramid pulp has a fineness of 150 to 250 ml.
- the wholly aromatic aramid paper for electric insulation according to the present invention may comprise a mixture of aramid flock and aramid pulp having a fine particle content of 20 wt% or more.
- the blend may comprise 20 to 40% by weight of aramid flock and 60 to 80% by weight of aramid pulp.
- the length of the aramid flake is 4 mm to 8 mm
- the length of the aramid pulp is 0.5 mm to 0.8 mm
- the aramid pulp has a fineness of 150 to 250 ml.
- a method for manufacturing a wholly aromatic aramid paper for an electric insulation paper comprises: preparing an aramid flock; Preparing an aramid pulp having a fine particle content of 20 wt% or more; Mixing the aramid flour and the aramid pulp at a ratio of 20:80 to 40:60 to prepare a feedstock; And a raw paper forming step of forming the paper stock as raw paper.
- the length of the aramid flake is 4 mm to 8 mm
- the length of the aramid pulp is 0.5 mm to 0.8 mm
- the aramid pulp has a fineness of 150 to 250 ml.
- the aramid paper according to the present invention comprises aramid flock and a first mixture comprising aramid pulp and aramid pulp having a length of 0.5 to 0.8 mm and a fineness of 150 to 250 ml; And calendering by applying a second mixture comprising aramid flakes and aramid pulp containing at least 20% by weight of fine powder to at least one of the top or bottom of the paper.
- the first mixture may contain 20 to 40% by weight of aramid flock and 60 to 80% by weight of aramid pulp.
- the aramid pulp containing 20% by weight or more of fine particles may be prepared by mixing 10 to 20% by weight of a flock having a length of 3 mm or more and less than 6 mm and 80 to 90% by weight of a flock of 6 mm or more and 8 mm or less with a refiner It can be manufactured by confusing it with a beating machine.
- the method for producing an aramid paper according to the present invention comprises the steps of: forming a base paper with a first mixture of aramid flakes and aramid pulp having a length of 0.5 to 0.8 mm and a fineness of 150 to 250 ml;
- the foam may be prepared by blending a first mixture comprising 20 to 40% by weight of an aramid flour and 60 to 80% by weight of an aramid pulp.
- the aramid pulp containing 20% by weight or more of fine particles may be prepared by mixing 10 to 20% by weight of a flock having a length of 3 mm or more and less than 6 mm and 80 to 90% by weight of a flock of 6 mm or more and 8 mm or less with a refiner It can be manufactured by confusing it with a beating machine.
- the present invention relates to an aramid paper having improved strength of paper without using an additional binder by using para aramid pulp, especially pulp having a long fiber length and developed fibril with aramid flock, will be.
- the present invention also relates to a method for producing aramid pulp having a fiber length of not more than a certain length, a fibril development of a certain degree,
- the present invention relates to a wholly aromatic aramid paper for an electric insulating paper and a method of manufacturing the same, wherein uniform electrical insulation of the paper is provided without using additional binders.
- the present invention also relates to a method for improving the strength and cohesion of a laminated aramid paper by using aramid pulp, especially aramid pulp, with long fiber length and fibril developed pulp, together with aramid flock, Aramid pulp having a fiber length of not more than a certain length, a fibril development of a certain degree or more and a fineness content of a certain ratio or more is used in a certain proportion together with a para-aramid flock in order to improve the cohesion on the prepared paper, Laminated aramid paper and paper excellent in joint strength without using additional binders by bonding, and a method for producing the same.
- Fiber means a unit of relatively flexible material having a high length to width ratio across a cross-sectional area perpendicular to the length, and is used interchangeably with the term " filament ".
- the cross-section of the filaments described herein can be of any shape, but is typically circular or bean-shaped.
- a fiber spun in a package on a bobbin is called a continuous fiber. Fibers can be cut into short lengths called staple fibers. Fibers can be cut to shorter lengths called flocks.
- the yarns, multifilament yarns or tows comprise a plurality of fibers. Yarn can be entangled / entangled or twisted.
- Staple fibers means filaments of 15 cm or less, preferably 3 to 15 cm; And most preferably 3 to 8 cm in length.
- the staple fiber is straight (i.e., non-crimped) or crimped to have a serrated crimp along its length at any crimp (or repeat bend) frequency.
- the fibers may be in an uncoated or coated, or pretreated (e.g., pre-stretched or heat-treated) form.
- Aramid means a wholly aromatic polyamide, and is defined as a linearly-synthesized polymer characterized in that at least 60 mole% of the bonds connecting benzene rings are amide groups.
- the aramid is classified into para-aramid, meta-aramid and copolymers thereof at the substitution position of the amide group in the benzene ring.
- the para-aramid may be exemplified by polyparaphenylene terephthalamide and its copolymer, poly (paraphenylene) -copoly (3,4 diphenyl ether) terephthalamide and the like, and the meta-aramid may be poly (metaphenylene isophthalate) Amides and copolymers thereof.
- para-aramid may be more preferably selected.
- aramid pulp refers to a fibrillated microfiber made of aramid.
- the aramid pulp can be formed into a sheet form in a paper machine after being dispersed in water in order to have superfine properties like ordinary wood pulp. In order to improve the mechanical properties, To induce the fibrillation of individual short fibers in a dispersed state.
- the wound aramid filament is cut using a rotary cutter to produce aramid staple fibers having a predetermined length.
- washing is carried out to remove foreign substances in the aramid staple fibers, that is, fine powders or emulsions, and it is preferable to carry out the washing at a temperature of room temperature or higher in order to easily remove the foreign materials.
- the washed aramid staple fiber is dispersed in water to carry out a dissociation process for producing a homogeneous slurry. It is preferable that the dissociation process is performed at a temperature of room temperature or higher to further remove the remaining tanning agent and improve the dispersibility of the aramid staple fibers. Through the dissociation process, each of the aramid staple fibers is separated into a plurality of monofilaments.
- the concentration of the aramid staple fibers in the slurry is preferably 1.0 to 2.0% by weight.
- the slurry uniformly dispersed in water is subjected to a beating process through the dissociation process.
- the aramid staple fibers are separated and cut as well as fibrillated using a refiner to produce fibrillated aramid staple fibers having an average length of the aramid staple fibers of 0.5 to 5 mm.
- the dissociation process and the beating process may be repeated.
- the slurry containing the fibrillated aramid staple fibers through the beating process is made into a sheet, followed by a squeezing process to remove water from the grass first, and the firstly moisture-removed grass is dried Whereby the water is removed in the second order. The dried grass is then crushed to produce the final aramid pulp.
- the beating process is one of the important processes for determining the freeness of the aramid pulp (Canadian Standard Freeness).
- the degree of fibrillation of aramid pulp varies greatly depending on the degree of fibrillation of the aramid staple fibers through the beating process. That is, when the degree of fibrillation is good, the degree of freeness of the pulp becomes low, which means that the dispersibility of the aramid pulp is excellent. On the other hand, if the degree of fibrillation is poor, the degree of freeness of the pulp becomes high, which means that the dispersibility of the aramid pulp is poor. It is also important that the aramid pulp has uniform physical properties. If the fibrillation is uneven, the deviation of the degree of freeness becomes large. As the deviation of Yeosu becomes larger, the final product to which it is applied also increases the defective rate because the difference of physical properties between products increases.
- Fibrids non-granular, fibrous, or film-like particles. They have a melting point or decomposition temperature of at least 320 in the wind. Fibrids are fibers rather than fibers in that they have a fiber-like region connected by a web. The fibrids have an aspect ratio of 5: 1 to 10: 1 and an average length of 0.2 to 1.0 mm. The thickness of the fibrid web is less than 1 or 2 micrometers and is typically a prime number of less than 1 micrometer. Prior to drying, the fibrids may be used in a wet state and deposited as physically twisted binders around other components of the article. The fibrids may be prepared by any method, including using a fibridation apparatus of the type disclosed in U.S. Patent No. 3,018,091 in which the polymer solution is precipitated and sheared in a single step.
- Fibrils means small fibers having a small diameter of from a few microns to a few microns of less than one micrometer and a length of about 10 to 100 micrometers.
- the fibrils typically extend from the main trunk of a larger fiber having a diameter of 4 to 50 micrometers.
- the fibrils act as hooks or fasteners to trap adjacent materials.
- Some fibers are fibrillated, while other fibers are not fibrillated or effectively fibrillated, in which case the fibers are not fibrillated.
- Poly (meta-phenylene terephthalamide) fibers are readily fibrillated to produce fibrils during polishing. The poly (meta-phenylene isophthalamide) fiber is not fibrillated.
- “Aramid flock” is a staple fiber made by cutting a continuous filament with a short length of unfibrilized aramid.
- the length of the aramid flock is usually 1 to 50 mm, and if the length is less than 1 mm, And when the length is 50 mm or more, it is known that it is not preferable because the possibility of occurrence of tangling is large when the sheet is formed, which tends to cause bonding.
- the aramid flock can be produced by cutting aramid fibers to short lengths without significant or optional fibrillization, such as those produced by the methods described in, for example, U.S. Patent Nos. 3,063,966, 3,133,138, 3,767,756, and 3,869,430 .
- the paper when the flock having a diameter of 3 mm or less is used, the paper is not easily conveyed and strength irregularity occurs.
- the diameter is 9 mm or more, flocculation occurs between the flocks and the length of the aramid flock is 4 mm to 8 mm Is preferable for the production of air purifiers made of aramid paper for honeycomb, aramid paper for electric insulation, and a first mixture containing aramid flour and aramid pulp.
- the first mixture comprising aramid paper for honeycomb, aramid paper for electric insulation, and a first mixture containing aramid flock and aramid pulp
- 60 to 80% by weight of aramid pulp and 20 to 40% by weight of aramid flock are mixed It is more preferable to use it.
- a second mixture containing aramid flour and aramid pulp containing not less than 20% by weight of fine particles is prepared on the paper of the present invention
- the flour of 3 mm or less is used, In case of 9 mm or more, cohesion occurs between the flocs, and the length of the aramid flock is preferably 4 mm to 8 mm, which is preferable for the production of the second mixture.
- TAPPI T233 cm-95 the classification according to the length of the fiber length of the pulp is as follows. TAPPI T233 cm-95 is used to measure the weight average fiber length of a pulp. The length of the fiber is 1 mm and the weight average length of the fiber The average length (L) is defined as ⁇ (wl) / ⁇ w.
- the classification according to the length of the fiber can be made using Clark type or Bauer-McNett type classifier, Classification according to the length is carried out in the order of separating the long fibers using a coarsest screen and sequentially separating the short fibers using a dense screen.
- the opening of a commonly used Tyler screen is as shown in Table 1 below, and the screen opening combination for classification according to the length of a generally used fiber is as follows.
- the aramid pulp having a fine particle content of a certain value or more according to the present invention is prepared by mixing a mixed aramid flock obtained by mixing aramid flocs having different lengths in a certain ratio with a refiner equipped with a refiner.
- the fine particle content was measured by the method.
- an aramid paper, a laminated aramid paper for a honeycomb, an electric insulating paper, a laminated aramid paper and a manufacturing method thereof according to the present invention will be described in detail with reference to examples.
- the polymer thus prepared was then dissolved in 99% concentrated sulfuric acid to prepare an optically anisotropic radiation dopant having a polymer content of 18% by weight.
- the prepared spinning dope was spinned using a spinneret and then solidified in a coagulation bath through an air layer to produce a filament.
- the filament was washed with water and dried, and then wound by a winder to obtain a poly (para-phenylene terephthalamide) filament.
- the poly (para-phenylene terephthalamide) filament was cut using a rotary cutter and cut into a length (3, 6, 9 mm) and used as an aramid flock.
- Production Example 3 Production of aramid pulp having a fine particle content of 20% or more
- Example 1-1 Preparation of aramid paper for honeycomb
- Aramid paper for honeycomb was prepared in the same manner as in Example 1-1 except that aramid flocks of 3 mm and 9 mm length were used.
- a aramid paper for honeycomb was prepared in the same manner as in Example 1-1 except that 5 kg of aramid flake and aramid pulp were used, respectively.
- Example 1-2 Preparation of aramid paper for electric insulation paper
- An aramid paper for electric insulation was prepared in the same manner as in Example 1-2, except that aramid flocks 3 mm and 9 mm in length were used.
- An aramid paper for electric insulation was prepared in the same manner as in Example 1-2, except that 5 kg of aramid flake and aramid pulp were used, respectively.
- Laminated aramid paper was prepared by calendering in the same manner except that aramid flocks of Examples 1-3 and 3 mm and 9 mm length were used.
- Laminated aramid paper was prepared by calendering in the same manner as Example 1-3, except that 5 kg of aramid flake and aramid pulp were used, respectively.
- the specific surface area (g) was measured using the nitrogen adsorption method by the BET measurement method.
- the weight average length was measured using a "FiberExpert” table top analyzer (also known as “PulpExpert FS” available from Metoso Automation, Helsinki, Finland).
- the analyzer took photographic images of the pulp with a digital CCD camera as the pulp slurry passed through the analyzer and the integrated computer then analyzed the fibers in the image and calculated the weighted average length thereof.
- the degree of fibrillation was measured using a "FiberExpert” table top analyzer (also known as “PulpExpert FS” available from Metoso Automation, Helsinki, Finland) Respectively.
- the Canadian Standard Freeness is a well-known measure of water drainage from slurry or dispersion of particles. The degree of freeness was measured by TAPPI Test 227. The data obtained from the performance of the test is expressed in Canadian Standard Freeness, which represents the millimeter of water drained from the aqueous slurry under certain conditions. The higher the number, the higher the drainage of water and water. Small values indicate a tendency for the dispersion to drain slowly. The greater the number of fibrils, the lower the rate at which water is drained through the forming paper matte, so the freeness of the fleece is inversely proportional to the freeness of the pulp.
- the production of the aramid pulp having a fine particle content of a certain value or more according to the present invention is performed by mixing refractory mixed aramid flock having 10 to 20% by weight of the flock of 3 mm or more and less than 6 mm and 80 to 90%
- the aramid pulp produced by this method was manufactured by Tyler screens 28 (0.595 mm), 48 (0.297 mm), and 48 mm (0.297 mm) as defined in TAPPI (Technical Association of Pulp and Paper Industry)
- the pulp having a short length separated by successively using 100 (0.149 mm), 150 (0.105 mm) or 200 (0.074 mm) was measured and the content of fine particles was 20% by weight or more.
- aramid paper for honeycomb prepared by using 70 wt% of aramid pulp and 30 wt% of 6 mm long aramid pulp having a long fiber length and a large amount of fibril formation through the refining process was excellent in strength of the base paper .
- the length of the aramid flock is 4 mm to 8 mm Was preferable for the production of aramid paper for honeycomb.
- the content of the aramid pulp is 50% or less in the production of the aramid paper for honeycomb, the strength is lowered. Therefore, the content of the aramid pulp is preferably 60 to 80% by weight, and the content of the aramid flock is 20 to 40% It is more preferable to use them.
- the length of the aramid flock is 4 mm to 8 mm Is preferable for the production of aramid paper for electrical insulation.
- the content of the aramid pulp is 50% or less in the production of the aramid paper for electric insulating paper, the strength is lowered. Therefore, the content of the aramid pulp is preferably 60 to 80% by weight, and the content of the aramid pulp is 20 to 40% It is more preferable to use them in combination.
- a fiber length of 6 mm was used and the fiber length was controlled by refining process.
- a fiber length of 6 mm was used and the length of the fiber was controlled by controlling the refining process.
- the strength and CSF were superior to the paper using the pulp containing the respective paper and fine particles.
- laminated aramid paper prepared by using 70 wt% of aramid pulp and 30 wt% of 6 mm length aramid pulp having a long fiber length and a large amount of fibril formation through refining process was excellent in physical properties.
- the aramid paper according to the present invention can be applied to materials or parts requiring a small difference in physical properties such as thermal expansion coefficient, electrical conductivity and thermal conductivity, and more specifically, it has excellent adhesion with intelligence, Substrates and the like.
- thermal expansion coefficient such as thermal expansion coefficient, electrical conductivity and thermal conductivity
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Tyler series | Opening, mm | U.S. standard |
10 | 1.68 | 12 |
12 | 1.41 | 14 |
14 | 1.19 | 16 |
20 | 0.841 | 20 |
28 | 0.595 | 30 |
35 | 0.420 | 40 |
48 | 0.297 | 50 |
65 | 0.210 | 70 |
100 | 0.149 | 100 |
150 | 0.105 | 140 |
200 | 0.074 | 200 |
평량(g/m2) | 두께(mm) | 밀도(g/cm3) | 강력(N/mm2) | ||
MD | CD | ||||
실시예 1-1 | 54 | 0.54 | 1.24 | 12.6 | 16.5 |
비교예 1-1 | 51 | 0.61 | 1.14 | 5.4 | 10.4 |
비교예 2-1 | 52 | 0.58 | 1.18 | 4.9 | 8.2 |
평량(g/m2) | 두께(mm) | 밀도(g/cm3) | 강력(N/mm2) | 유전 강도(kV/min) | ||
MD | CD | |||||
실시예 1-2 | 253 | 0.238 | 1.15 | 15.6 | 16.5 | 6.4 |
비교예 1-2 | 251 | 0.252 | 1.02 | 6.9 | 11.6 | 5.6 |
비교예 2-2 | 248 | 0.258 | 0.98 | 4.2 | 10.4 | 5.3 |
비교예 3-2 | 254 | 0.232 | 1.2 | 3.9 | 8.5 | 5.9 |
평량(g/m2) | 두께(mm) | 밀도(g/cm3) | 강력(N/mm2) | 유전 강도(kV/min) | ||
MD | CD | |||||
실시예 1-3 | 112 | 1.04 | 1.25 | 25.1 | 29.5 | 8.4 |
비교예 1-3 | 104 | 1.01 | 1.14 | 11.2 | 20.4 | 7.6 |
비교예 2-3 | 101 | 1.08 | 1.04 | 12.4 | 24.3 | 6.3 |
비교예 3-3 | 108 | 1.07 | 1.16 | 18.4 | 24.5 | 6.9 |
비교예 4-3 | 110 | 1.05 | 1.08 | 21.5 | 26.6 | 7.8 |
Claims (6)
- 아라미드 플럭과 길이가 0.5 내지 0.8 mm이고 여수도가 150 내지 250 ml인 아라미드 펄프를 포함하는 제1혼합물로 이루어지는 기포지; 및상기 기포지의 상부, 또는 하부 중 하나 이상에 아라미드 플럭과 20중량% 이상의 미세분을 포함하는 아라미드 펄프를 포함하는 제2혼합물을 도포하여 캘린더링으로 결합한 것을 특징으로 하는 아라미드 페이퍼.
- 청구항 1에 있어서,상기 제1혼합물은 아라미드 플럭 20 내지 40 중량%, 아라미드 펄프 60 내지 80 중량%를 포함하는 것을 특징으로 하는 아라미드 페이퍼.
- 청구항 1에 있어서,상기 20 중량% 이상의 미세분을 포함하는 아라미드 펄프는 길이 3 mm 이상 6 mm 미만 플럭 10 내지 20 중량%와 6mm 이상 8 mm 이하의 플럭 80 내지 90 중량%의 혼합 아라미드 플럭을 리파이너가 장착된 고해기로 고해시켜 제조되는 것을 특징으로 하는 아라미드 페이퍼.
- 아라미드 플럭과 길이가 0.5 내지 0.8 mm이고 여수도가 150 내지 250 ml인 아라미드 펄프의 제1혼합물로 기포지를 제조하는 기포지 제조단계;상기 기포지 위에 아라미드 플럭과 20 중량% 이상의 미세분을 포함하는 아라미드 펄프의 제2혼합물을 도포하는 제2혼합물 도포단계; 및상기 기포지와 도포된 제2혼합물을 결합하는 캘린더링 단계를 포함하는 것을 특징으로 하는 아라미드 페이퍼의 제조방법.
- 청구항 4에 있어서,상기 기포지는 아라미드 플럭 20 내지 40 중량%, 아라미드 펄프 60 내지 80 중량%를 혼합한 제1혼합물을 초지하여 제조되는 것을 특징으로 하는 아라미드 페이퍼의 제조방법.
- 청구항 4 에 있어서,상기 20 중량% 이상의 미세분을 포함하는 아라미드 펄프는 길이 3 mm 이상 6 mm 미만 플럭 10 내지 20 중량%와 6mm 이상 8 mm 이하의 플럭 80 내지 90 중량%의 혼합 아라미드 플럭을 리파이너가 장착된 고해기로 고해시켜 제조되는 것을 특징으로 하는 아라미드 페이퍼의 제조방법.
Priority Applications (4)
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US15/577,477 US10407829B2 (en) | 2015-05-28 | 2016-05-27 | Aramid paper, manufacturing method therefor, and use thereof |
JP2017561709A JP6531186B2 (ja) | 2015-05-28 | 2016-05-27 | アラミド紙、その製造方法及び用途 |
CN201680041086.XA CN107849813B (zh) | 2015-05-28 | 2016-05-27 | 芳族聚酰胺纸、制备方法及其用途 |
EP16800333.3A EP3305982B1 (en) | 2015-05-28 | 2016-05-27 | Aramid paper, manufacturing method therefor, and use thereof |
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KR1020150074613A KR20160139542A (ko) | 2015-05-28 | 2015-05-28 | 전기 절연지용 전방향족 아라미드 종이 및 그의 제조방법 |
KR10-2015-0074612 | 2015-05-28 | ||
KR1020150074612A KR20160139541A (ko) | 2015-05-28 | 2015-05-28 | 허니콤용 아라미드 페이퍼 및 그의 제조방법 |
KR1020150074614A KR101700827B1 (ko) | 2015-05-28 | 2015-05-28 | 적층 아라미드 종이 및 그 제조방법 |
KR10-2015-0074613 | 2015-05-28 | ||
KR10-2015-0074614 | 2015-05-28 |
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WO2016190694A2 WO2016190694A2 (ko) | 2016-12-01 |
WO2016190694A3 WO2016190694A3 (ko) | 2017-01-19 |
WO2016190694A4 true WO2016190694A4 (ko) | 2017-05-11 |
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US (1) | US10407829B2 (ko) |
EP (1) | EP3305982B1 (ko) |
JP (1) | JP6531186B2 (ko) |
CN (1) | CN107849813B (ko) |
WO (1) | WO2016190694A2 (ko) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2961981T3 (es) | 2017-09-18 | 2024-03-14 | Int Paper Co | Método y aparato para controlar un sistema de fraccionamiento de fibra |
US10767316B2 (en) * | 2017-11-01 | 2020-09-08 | Dupont Safety & Construction, Inc. | Paper comprising aramid pulp and a friction paper made therefrom |
US11686048B2 (en) * | 2018-05-28 | 2023-06-27 | Teijin Aramid B.V. | Aramid-based paper with improved properties |
CN112709096A (zh) * | 2019-10-26 | 2021-04-27 | 南通亚振电力科技有限公司 | 一种高抗张强度绝缘皱纹纸及其加工工艺 |
WO2021137524A1 (ko) * | 2019-12-31 | 2021-07-08 | 코오롱인더스트리 주식회사 | 아라미드 펄프 및 그 제조방법 |
Family Cites Families (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3063966A (en) | 1958-02-05 | 1962-11-13 | Du Pont | Process of making wholly aromatic polyamides |
US3133138A (en) | 1958-12-19 | 1964-05-12 | Du Pont | Stretching and heat crystallization of poly(meta-phenylene isophthalamide) fibers |
US3018091A (en) | 1959-04-10 | 1962-01-23 | Du Pont | Precipitation apparatus |
US3869430A (en) | 1971-08-17 | 1975-03-04 | Du Pont | High modulus, high tenacity poly(p-phenylene terephthalamide) fiber |
US3767756A (en) | 1972-06-30 | 1973-10-23 | Du Pont | Dry jet wet spinning process |
JPS5591046A (en) | 1978-12-29 | 1980-07-10 | Nec Corp | Switch control system |
US4698267A (en) * | 1985-09-17 | 1987-10-06 | E. I. Du Pont De Nemours And Company | High density para-aramid papers |
JP2535418B2 (ja) | 1989-09-05 | 1996-09-18 | 帝人株式会社 | 耐熱紙 |
US5026456A (en) | 1990-06-14 | 1991-06-25 | E. I. Du Pont De Nemours And Company | Aramid papers containing aramid paper pulp |
JP2938268B2 (ja) * | 1992-05-01 | 1999-08-23 | 帝人株式会社 | カレンダー加工方法 |
JPH1046484A (ja) | 1996-07-30 | 1998-02-17 | Oji Paper Co Ltd | 薄葉耐熱性多孔紙 |
JP3777711B2 (ja) * | 1997-04-15 | 2006-05-24 | 王子製紙株式会社 | 薄葉多孔紙 |
US5833807A (en) | 1997-04-17 | 1998-11-10 | E. I. Du Pont De Nemours And Company | Aramid dispersions and aramid sheets of increased uniformity |
CN1078645C (zh) | 1999-01-22 | 2002-01-30 | 四川省对外经济贸易总公司 | 特种合成纤维纸及其生产方法 |
JP3321141B2 (ja) * | 2000-04-03 | 2002-09-03 | 昭和飛行機工業株式会社 | アラミドハニカムおよびその製造方法 |
JP3961252B2 (ja) * | 2000-09-20 | 2007-08-22 | 新神戸電機株式会社 | 電気絶縁用不織布ならびにプリプレグ及び積層板 |
US20020142689A1 (en) * | 2001-01-23 | 2002-10-03 | Levit Mikhail R. | Non-woven sheet of aramid floc |
JP2003221794A (ja) | 2002-01-28 | 2003-08-08 | Teijin Ltd | 積層板用基材及びプリプレグ、並びに積層板 |
US7335276B2 (en) | 2002-10-01 | 2008-02-26 | E.I. Du Pont De Nemours And Company | Formation of aramid paper laminate |
JP4137600B2 (ja) | 2002-11-12 | 2008-08-20 | 帝人テクノプロダクツ株式会社 | 芳香族ポリアミド繊維紙 |
CA2524384A1 (en) * | 2003-06-18 | 2004-12-29 | E. I. Du Pont De Nemours And Company | Methods using fluoroketones for: extinguishing fire; preventing fire; and reducing or eliminating the flammability of a flammable working fluid |
US6889663B2 (en) | 2003-07-08 | 2005-05-10 | General Electric Company | Cam sensor elimination in compression-ignition engines |
US20050230072A1 (en) * | 2004-04-16 | 2005-10-20 | Levit Mikhail R | Aramid paper blend |
US7455750B2 (en) * | 2004-06-25 | 2008-11-25 | E.I. Du Pont De Nemours And Company | Meta- and para-aramid pulp and processes of making same |
JP4468790B2 (ja) * | 2004-11-18 | 2010-05-26 | 日本バイリーン株式会社 | 不織布、電気二重層キャパシタ用セパレータ、リチウムイオン二次電池用セパレータ、電気二重層キャパシタ及びリチウムイオン二次電池 |
CN1710196A (zh) * | 2005-06-20 | 2005-12-21 | 华南理工大学 | 全对位芳纶酰胺纸及其制备方法和应用 |
JP4950485B2 (ja) * | 2005-12-22 | 2012-06-13 | 帝人テクノプロダクツ株式会社 | 紙−繊維構造物積層体およびその製造方法 |
US7771810B2 (en) | 2006-12-15 | 2010-08-10 | E.I. Du Pont De Nemours And Company | Honeycomb from paper having a high melt point thermoplastic fiber |
US8268434B2 (en) | 2007-11-30 | 2012-09-18 | E I Du Pont De Nemours And Company | Honeycomb having a high compression strength and articles made from same |
KR20090110031A (ko) * | 2008-04-17 | 2009-10-21 | 주식회사 코오롱 | 파라계 아라미드지 및 이를 포함하는 방검용 보호복 |
JP5591046B2 (ja) | 2010-09-29 | 2014-09-17 | ダイワボウホールディングス株式会社 | 絶縁性不織布およびその製造方法 |
US11427962B2 (en) | 2011-01-04 | 2022-08-30 | Teijin Aramid B.V. | Paper comprising microfilaments |
WO2012093048A1 (en) | 2011-01-04 | 2012-07-12 | Teijin Aramid B.V. | Electrical insulating paper |
KR20130133348A (ko) * | 2012-05-29 | 2013-12-09 | 코오롱인더스트리 주식회사 | 원착 아라미드 단섬유 및 그의 제조방법 |
WO2014079761A1 (en) * | 2012-11-23 | 2014-05-30 | Teijin Aramid B.V. | Electrical insulating paper |
KR101515307B1 (ko) * | 2013-12-30 | 2015-04-24 | 도레이케미칼 주식회사 | 고평량 메타 아라미드 페이퍼 및 그 제조방법 |
-
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- 2016-05-27 US US15/577,477 patent/US10407829B2/en active Active
- 2016-05-27 WO PCT/KR2016/005608 patent/WO2016190694A2/ko active Application Filing
- 2016-05-27 EP EP16800333.3A patent/EP3305982B1/en active Active
- 2016-05-27 CN CN201680041086.XA patent/CN107849813B/zh active Active
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US20180142415A1 (en) | 2018-05-24 |
EP3305982A4 (en) | 2019-01-23 |
EP3305982B1 (en) | 2020-09-09 |
EP3305982A2 (en) | 2018-04-11 |
JP6531186B2 (ja) | 2019-06-12 |
CN107849813B (zh) | 2020-05-12 |
US10407829B2 (en) | 2019-09-10 |
WO2016190694A3 (ko) | 2017-01-19 |
WO2016190694A2 (ko) | 2016-12-01 |
CN107849813A (zh) | 2018-03-27 |
JP2018515697A (ja) | 2018-06-14 |
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