• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Mixt., esp. for sheathing pencil leads, consists of 100 pts. wt. polyvinyl aromatic resin, 1-9.5 pts. wt. polyethylene, 1-30 pts. wt. polypropylene, PVC and/or PVAc, 1-20 pts. wt. talcum, 5-50 pts. wt. chopped glass fibres, 0.3-2 pts. wt. blowing agent, (I), decomposing at 170-240 degrees C and 0.3-2 pts. wt. blowing agent (II) decomposing at 100-160 degrees C. The 0.3-2 pts. wt. of (II) can be replaced by 1-20 pts. wt. of foamable resin. The mixt. can be used for hexagonal and round leads and for pastel-coloured pencils. The prods. have an even structure, good adhesion to coated articles, can be cut well and have flexural elasticity modulus 30-40000 kp/cm2. A microporous structure can be achieved in 2 consecutive steps. Pencil mfr. takes place without waste, cheaply, with savings in wood and labour.
    公开号:SU730774A1
    申请号:SU782568006
    申请日:1978-01-23
    公开日:1980-04-30
    发明作者:Ружичка Ян；Лоренз Йиндрих；Марек Владимир；Тушл Мирослав
    申请人:Ког-И-Ноор Гардтмут, Оборовы Подник (Инопредприятие)；
    IPC主号:
    专利说明:

    (54) POLYMER COMPOSITION FOR COATING
    one
    This invention relates to a polymeric composition for coating leads in the manufacture of sticks.
    Easy to sharpened pencils, besides classical ones, are also made of wood from various plastic mixtures and prophors.
    The closest to the described invention by technical sushi and achieved. The result is a polymer composition for coating the slate based on a mixture of polyvinyl aromatic polymer, polyethylene, crushed glass fibers, porous with a decomposition temperature of 170-240 ° C.
    The disadvantage of these pencils is their low elasticity, as well as the fact that pressed pencils do not always have a uniform structure.
    The purpose of the invention is to increase the modulus of elasticity.
    This goal is achieved by the fact that a polymer composition for coating of slate, including viiiilaromaticP polymer, polyethylene, crushed glass fiber, talc, porophore with a decomposition temperature of 170-240 ° C, a plasticizer and
    P1T G.T AHTUT g
    GRILLE
    Mathematical polymer, a polymer selected from the group including: polystyrene, styrene, acrylonitrile, acrylonitrile butadiene styrene, and additionally, a polymer selected from the group including: polypropylene, polyvinyl acetate, polyvinyl chloride, or mixtures thereof, and porofor with a decomposition temperature of 100-160 ° С the following ratio of components, weight. including:
    Vinyl aromatic polymer100
    Polyethylene1.0-9.5
    A polymer selected from the group including substances: polypropylene, polyvinyl acetate, olivine methyl chloride, or c. , 0-30,0
    Ground fiberglass 5.0-50.0
    Talc
    1,0-20,0 Porofor with
    temperature raz170-240 ° C
    0.3-2.0
    false | Porofor with a temperature of 100-1 GOT,
    0.3-2.0
    Logger Plasticizer
    0.1-6.0 PPg.menty 0.001-5.0
    As
    fiberglass
    use fiberglass.
    of 1 CLEAN made
    Azo-isobutronitron is usually used as a porophore with a decomposition temperature of 100-160 ° C; azodicarbonamnd is used as a norophor with a decomposition temperature of 170-240 ° C.
    As a plasticizer, medical oil, butyl stearate, polyethylene glycol, etc. are used.
    As pigments, iron oxides (for example, Pepren 202, product of the Psherovsky chemical plants, Czechoslovakia), oxides of titanium (for example, Fleece RP, product of the company Laporte, England), cadmium sulfides (for example, C gelb 12FBA, product Single, FRG) are used. The amount of pigment depends on the desired color tone. Coloring is preferably done in cedar wood tones.
    The composition is prepared as follows.
    First mix polymers, fiberglass and talc. using a bar press, this mixture is extruded with the addition of pigments, which are necessary to color the mixture to a tone of cedar wood. The extruded mixture is then granulated. To 100 weight. Part of the granulated material thus obtained in a slowly rotating mixer after the addition of a plasticizer is mixed with porophores.
    Then the mixture is extruded using a bar press, which is equipped with a transverse syringe-head. Simultaneously, a single plastic press is continuously metered or extruded with the help of another bar press into it. The extruded hexagonal is calibrated in a calibration ycTpoiicTse and then cut to the appropriate length of a classic pencil. The surface of the resulting pencil can be improved by
    applying a lacquer coating or spraying three times on the surface of the syringe-head of a thin decorative layer that stiffens the plastic. The structure of extruded profiles can be
    adjust by setting a suitable technological regime using a bar press or using a special screw. Antistatic agents can be added to the mixture.
    reduce the electric charge of the pencil. This is especially necessary in the case of a pencil sharpening with an electric sharpening tool.
    Part of the blowing agent with temperature
    decomposition of 100-160 ° C. can be introduced into the mixture in the form of foamed plastic containing porophore (see table) Examples of specific performance illustrating the invention, ii the modulus of elasticity of the obtained coatings are presented in the table.
    For example. Flexural modulus .iO by 35, 34, 39, 32,; Yu.
    The proposed composition is particularly suitable for coating leads in the manufacture of | | | | p1grt1 1p; 1I11YH and
    1 P I g g p g P 1 I t P g g fV f
    Round Leads, and also for pastel colored pencils. The pencils made according to the invention are distinguished by examples 7, respectively 3740
    with good hardenability, they have more bending strength. With dopol 1 te.; | surface finish by varnishing or at the same time coating with a thin decorative layer of plastic they have a good surface quality.
    Making pencils from such a composition is very profitable as compared to the classic one, since there is almost no waste. The manufacturer is extremely simple, the cost of the necessary devices and the volume is less, the working area is improved, and the wood is also significantly saved.
    权利要求:
    Claims (1)
    [1]
    1. Patent of Germany No. 2203835, cl. In 43K 19/02, published. 05.10.72 (prototype).
    类似技术:
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    同族专利:
    公开号 | 公开日
    ATA53778A|1980-11-15|
    JPS53102377A|1978-09-06|
    FR2378834A1|1978-08-25|
    DE2803206B2|1980-06-04|
    PL203859A1|1978-08-28|
    CS193772B1|1979-11-30|
    DE2803206A1|1978-07-27|
    DD133923A1|1979-01-31|
    DE2803206C3|1981-02-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2937441C2|1979-09-15|1983-06-30|Schwan-Stabilo Schwanhäußer GmbH & Co, 8500 Nürnberg|Method of making a powder stick|
    US5531947A|1992-09-15|1996-07-02|Bellaform Extrusionstechnik Gmbh|Process and installation for the manufacture of pencils|
    DE4230792C2|1992-09-15|1996-12-12|Bellaform Extrusionstech Gmbh|Pen and method of making the same|
    JP3282328B2|1993-12-17|2002-05-13|住友化学工業株式会社|Method for producing multilayer molded article and multilayer molded article|
    JPH10231377A|1997-02-18|1998-09-02|Asahi Chem Ind Co Ltd|Abs resin composition for extrusion and foaming, and foamed molded product|
    DE19754084A1|1997-12-05|1999-06-10|Johann Froescheis Lyra Bleisti|Drawing pencil, chalk or cosmetic applicator|
    EP1396352B9|2002-08-29|2005-06-15|KUM Limited|Self cleaning pencil|
    JP4834602B2|2007-04-27|2011-12-14|フクビ化学工業株式会社|Resin composition for pier and pier|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CS51577A|CS193772B1|1977-01-26|1977-01-26|Mixture especially for jacketing the lead|
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