JP4961486B2 - non-PVC eraser composition - Google Patents
non-PVC eraser composition Download PDFInfo
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- JP4961486B2 JP4961486B2 JP2010083548A JP2010083548A JP4961486B2 JP 4961486 B2 JP4961486 B2 JP 4961486B2 JP 2010083548 A JP2010083548 A JP 2010083548A JP 2010083548 A JP2010083548 A JP 2010083548A JP 4961486 B2 JP4961486 B2 JP 4961486B2
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- styrene
- weight
- eraser
- pvc
- butadiene
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- 239000000203 mixture Substances 0.000 title claims description 29
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 38
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 38
- 239000000395 magnesium oxide Substances 0.000 claims description 37
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 37
- 229920000459 Nitrile rubber Polymers 0.000 claims description 24
- 239000004793 Polystyrene Substances 0.000 claims description 23
- 229920002223 polystyrene Polymers 0.000 claims description 22
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 claims description 21
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 claims description 20
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 19
- 239000002480 mineral oil Substances 0.000 claims description 19
- 235000010446 mineral oil Nutrition 0.000 claims description 19
- 238000000465 moulding Methods 0.000 claims description 18
- 239000001993 wax Substances 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 15
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 13
- 229920001577 copolymer Polymers 0.000 claims description 7
- -1 polybutylene Polymers 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical compound CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004902 Softening Agent Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 229920001748 polybutylene Polymers 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 3
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- 239000003086 colorant Substances 0.000 claims description 2
- 239000000796 flavoring agent Substances 0.000 claims description 2
- 235000019634 flavors Nutrition 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- RZGZTQYTDRQOEY-UHFFFAOYSA-N 2-phenylethenone Chemical compound O=C=CC1=CC=CC=C1 RZGZTQYTDRQOEY-UHFFFAOYSA-N 0.000 claims 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Natural products CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims 1
- 239000010734 process oil Substances 0.000 claims 1
- 239000004800 polyvinyl chloride Substances 0.000 description 34
- 229920000915 polyvinyl chloride Polymers 0.000 description 33
- 235000012245 magnesium oxide Nutrition 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 11
- 238000004898 kneading Methods 0.000 description 11
- 239000004014 plasticizer Substances 0.000 description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 9
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 239000005556 hormone Substances 0.000 description 7
- 229940088597 hormone Drugs 0.000 description 7
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000004803 Di-2ethylhexylphthalate Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- IRIAEXORFWYRCZ-UHFFFAOYSA-N Butylbenzyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCC1=CC=CC=C1 IRIAEXORFWYRCZ-UHFFFAOYSA-N 0.000 description 4
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Chemical compound CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 4
- 231100000252 nontoxic Toxicity 0.000 description 4
- 230000003000 nontoxic effect Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- BJQHLKABXJIVAM-BGYRXZFFSA-N 1-o-[(2r)-2-ethylhexyl] 2-o-[(2s)-2-ethylhexyl] benzene-1,2-dicarboxylate Chemical compound CCCC[C@H](CC)COC(=O)C1=CC=CC=C1C(=O)OC[C@H](CC)CCCC BJQHLKABXJIVAM-BGYRXZFFSA-N 0.000 description 2
- ZVFDTKUVRCTHQE-UHFFFAOYSA-N Diisodecyl phthalate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC(C)C ZVFDTKUVRCTHQE-UHFFFAOYSA-N 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- BXOUVIIITJXIKB-UHFFFAOYSA-N ethene;styrene Chemical group C=C.C=CC1=CC=CC=C1 BXOUVIIITJXIKB-UHFFFAOYSA-N 0.000 description 2
- 239000000383 hazardous chemical Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- JQCXWCOOWVGKMT-UHFFFAOYSA-N phthalic acid diheptyl ester Natural products CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC JQCXWCOOWVGKMT-UHFFFAOYSA-N 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N vinyl-ethylene Natural products C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
- 108010000912 Egg Proteins Proteins 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- 241000237509 Patinopecten sp. Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 229960002380 dibutyl phthalate Drugs 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 210000003278 egg shell Anatomy 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 239000000598 endocrine disruptor Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000005003 food packaging material Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- 239000008029 phthalate plasticizer Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 235000020637 scallop Nutrition 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Description
本発明はｎｏｎ−ＰＶＣ消しゴム組成物に関するもので、さらに詳述すると、スチレン−ブタジエン−スチレン、ニトリルブタジエンラバー及びポリスチレンで形成される熱可塑性エラストマ、ワックス、ミネラルオイル、炭酸カルシウム（ＣａＣＯ３）、酸化マグネシウム（ＭｇＯ）及び二酸化チタン（ＴｉＯ２）を含むｎｏｎ−ＰＶＣ消しゴム組成物に関する。 The present invention relates to non-PVC eraser composition, In more detail, a styrene - butadiene - styrene, thermoplastic elastomer formed of nitrile-butadiene rubber and polystyrene, waxes, mineral oil, calcium carbonate (CaCO 3), The present invention relates to a non-PVC eraser composition containing magnesium oxide (MgO) and titanium dioxide (TiO 2 ).
一般的に消しゴムはＰＶＣというポリ塩化ビニルを素材として作られる。 Generally, the eraser is made of PVC, which is PVC.
上記ポリ塩化ビニルは環境有害物質中の一つで知られているが、生活で接するほとんどすべてのプラスチック製品に基本的に用いられる物質で、極めて微々たる程度の環境有害物質と環境ホルモンが検出されるので健康にあまり影響を与えない水準である。 Polyvinyl chloride is known as one of the environmentally hazardous substances, but it is a substance that is basically used in almost all plastic products that come into contact with daily life, and extremely small amounts of environmentally hazardous substances and environmental hormones are detected. Therefore, it is a level that does not significantly affect health.
塩化ビニル系の樹脂は、塩化ビニルの単独重合体及び塩化ビニルを５０％以上含んだ混成重合体として、懸濁重合と乳化重合に製造される五大汎用熱可塑性プラスチック樹脂中の一つである。このような塩化ビニル系樹脂はコンパウンド圧出成形、射出成形、ケルリンドリング、ゾル（ｚｏｌ）成形などの色々な加工法によって成形されてパイプ、建築用内外装材、電線、電気機械製品、おもちゃ、フィルム、シーツ、人造皮、テープ、食品包装材、あるいは医療用品まで多様な製品の素材として広く用いられている。ＰＶＣ樹脂は耐水性、内薬品性、難燃性などが優れており、多様な用途で用いられているが、樹脂が不完全燃焼すると、公害物質であるダイオキシンを発生し環境汚染を誘発させるという問題点があり、最近は使用が規制されている趨勢だ。このような塩化ビニル系樹脂には可塑剤、２次可塑剤、安定剤、顔料、充填剤、発布剤、潤滑剤、粘度調節剤など色々な添加剤を適切に添加して多様な加工物性を付与することができる。 Vinyl chloride-based resin is one of the five general-purpose thermoplastic resins produced by suspension polymerization and emulsion polymerization as a homopolymer of vinyl chloride and a hybrid polymer containing 50% or more of vinyl chloride. Such vinyl chloride resin is molded by various processing methods such as compound extrusion molding, injection molding, kellind ring, sol molding, etc., pipes, architectural interior / exterior materials, electric wires, electromechanical products, toys It is widely used as a material for various products such as films, sheets, artificial leather, tapes, food packaging materials, and medical supplies. PVC resin has excellent water resistance, internal chemical properties, flame retardancy, etc., and is used in various applications. However, when the resin is incompletely burned, it generates dioxins, which are pollutants, and induces environmental pollution. There is a problem, recently the use has been regulated. Various additives such as plasticizers, secondary plasticizers, stabilizers, pigments, fillers, foaming agents, lubricants, viscosity modifiers, etc. are added to such vinyl chloride resins to provide various processed physical properties. Can be granted.
可塑剤は高分子樹脂間の摩擦係数を減らして加工性を高める役割をする添加剤として、今まで用いられている可塑剤の類型は種類が非常に多様で用途もそれぞれ異なる。塩化ビニル系樹脂に使われる可塑剤では主にフタレート系可塑剤、特にＤＥＨＰ（Ｄｉ−２−ＥｔｈｙｌＨｅｘｙｌ Ｐｈｔｈａｌａｔｅ）、ＤＢＰ（Ｄｉ−Ｂｕｔｙｌ Ｐｈｔｈａｌａｔｅ）、ＩＤＰ（Ｄｉ−ＩｓｏＤｅｃｙｌ Ｐｈｔｈａｌａｔｅ）、ＢＢＰ（Ｂｕｔｙｌ Ｂｅｎｚｙｌ Ｐｈｔｈａｌａｔｅ）、 ＤＩＮＰ（Ｄｉ−ＩｓｏＮｏｎｙｌ Ｐｈｔｈａｌａｔｅ）、ＤＮＯＰ（Ｄｉ−ｎ−Ｏｃｔｙｌ Ｐｈｔｈａｌａｔｅ）などが最も広く用いられている。特にジエチルヘキシルフタレートは可塑化効率、耐寒性などの剤物性のバランスが良く、広く用いられている。 Plasticizers are additives that play a role in reducing the coefficient of friction between polymer resins and improving processability. The types of plasticizers used so far are very diverse and have different uses. Among plasticizers used for vinyl chloride resins, phthalate plasticizers are mainly used, in particular DEHP (Di-2-EthylHexyl Phthalate), DBP (Di-Butyl Phthalate), IDP (Di-Iso Decyl Phthalate), BBP (Butyl Benzyl Phthalate). DINP (Di-Iso Nonyl Phthalate), DNOP (Di-N-Octyl Phthalate), etc. are most widely used. In particular, diethyl hexyl phthalate has a good balance of physical properties such as plasticization efficiency and cold resistance, and is widely used.
しかし、上記フタレート系の可塑剤は、動物や人の身の中に入ってホルモンの作用を阻害したり、混乱させる内分泌界撹乱物質（ｅｎｄｏｃｒｉｎｅ ｄｉｓｒｕｐｔｅｒ）、すなわち環境ホルモンとして疑われており、このうちジエチルヘキシルフタレート（ＤＥＨＰ）及びジブチルフタレート（ＤＢＰ）は特に危険物質として規制の対象にされており代替物質が要求されている。また、ＤＥＨＰは分子量が小さくて耐熱性が弱く、熱によって容易に変形されるということも代替物質の要求の要因になっている。 However, the above phthalate plasticizers are suspected as endocrine disrupters that enter the body of animals and humans to inhibit or disrupt the action of hormones, that is, environmental hormones. Diethylhexyl phthalate (DEHP) and dibutyl phthalate (DBP) are particularly regulated as dangerous substances, and alternative substances are required. In addition, DEHP has a low molecular weight, low heat resistance, and is easily deformed by heat.
従来から使用されている消しゴムでは塩化ビニル系消しゴム、エラストマ系消しゴム及び天然ゴム系消しゴムが知られている。この中で、天然ゴム系消しゴムは耐久性に問題があってほとんど使用されておらず、エラストマ系消しゴムも消す能力の限界によってあまり使用されていない。塩化ビニル系消しゴムは字を消す能力の特性面において非常に優れており、主に使用されているが、用いられるフタル酸系可塑剤、特にＤＥＨＰとＤＢＰによる環境的悪影響と可塑剤移行性の問題によって代替消しゴムの開発が至急な実情となっている。 Conventionally used erasers include vinyl chloride erasers, elastomer erasers and natural rubber erasers. Of these, natural rubber-based erasers are rarely used due to problems with durability, and elastomer-based erasers are rarely used due to their limited ability to erase. Vinyl chloride-based erasers are very good in terms of the ability to erase characters and are mainly used, but the phthalic plasticizers used, especially DEHP and DBP, have adverse environmental effects and plasticizer migration problems. Therefore, the development of alternative erasers has become an urgent situation.
上記のような従来技術の問題点を解決すべく、本発明は既存消しゴムに用いられたＰＶＣ（ポリ塩化ビニル）を全く用いず、毒性がないため人体に対して無害であり、子供も安心して使用することができ、環境ホルモンを放出しないため環境親和的なｎｏｎ−ＰＶＣ消しゴム組成物を提供することを目的にする。 In order to solve the above-mentioned problems of the prior art, the present invention does not use PVC (polyvinyl chloride) used for the existing eraser at all and is harmless to the human body because it is not toxic. The object is to provide an environmentally friendly non-PVC eraser composition that can be used and does not release environmental hormones.
また、本発明は無毒であり、字消去性能が優れており、消しゴム本来の機能を充分に発揮することができるｎｏｎ−ＰＶＣ消しゴム組成物を提供することを目的にする。 Another object of the present invention is to provide a non-PVC eraser composition that is non-toxic, has excellent character erasing performance, and can fully exhibit the original function of the eraser.
上記目的を果たすために、本発明はスチレン−ブタジエン−スチレン、ニトリルブタジエンラバー及びポリスチレンで形成される熱可塑性エラストマ、ワックス、ミネラルオイル、炭酸カルシウム（ＣａＣＯ３）、酸化マグネシウム（ＭｇＯ）及び二酸化チタン（ＴｉＯ２）を含むことを特徴にするｎｏｎ−ＰＶＣ消しゴム組成物を提供する。 To achieve the above object, this invention is a styrene - butadiene - styrene, thermoplastic elastomer formed of nitrile-butadiene rubber and polystyrene, waxes, mineral oil, calcium carbonate (CaCO 3), magnesium oxides (MgO) and titanium dioxide A non-PVC eraser composition comprising (TiO 2 ) is provided.
望ましくは、上記消しゴム組成物はスチレン−ブタジエン−スチレン６〜１５重量％、ニトリルブタジエンラバー５〜１５重量％及びポリスチレン１〜６重量％で形成される熱可塑性エラストマ１０〜４０重量％、ワックス１〜５重量％、ミネラルオイル５〜２０重量％及び炭酸カルシウム（ＣａＣＯ３）５０〜７０重量％、酸化マグネシウム（ＭｇＯ）０．１〜５ｐｈｒ及び二酸化チタン（ＴｉＯ２）０．５〜５ｐｈｒを含む。 Desirably, the eraser composition is a styrene - butadiene - styrene 6-15 wt%, nitrile-butadiene rubber 5-15 wt%, and a thermoplastic elastomer 10 to 40 wt% formed in the polystyrene 1-6 wt%, wax 1 5% by weight, including mineral oil 5-20 wt%, and calcium carbonate (CaCO 3) 50-70 wt% of magnesium oxide (MgO) 0.1~5phr and titanium dioxide (TiO 2) 0.5~5phr.
本発明による消しゴムは、既存の消しゴムに用いられたＰＶＣ（ポリ塩化ビニル）を全く用いず、毒性がないため人体に対して無害であり、子供も安心して使用することができ、環境ホルモンを放出しないため環境親和的であり、同時に字消去性能が優れているため消しゴム本来の機能を充分に発揮することができる。 The eraser according to the present invention does not use PVC (polyvinyl chloride) used in existing erasers at all, is non-toxic because it is not toxic, can be used safely by children, and releases environmental hormones. Therefore, it is environmentally friendly, and at the same time the character erasing performance is excellent, so that the original function of the eraser can be fully exhibited.
以下、本発明を詳しく説明する。
本発明の消しゴム組成物は既存消しゴムに用いられたＰＶＣを用いないことでフタレート系可塑剤、ホルムアルデヒド、鉛などの人体有害物質が検出されず、無毒であり、子供も安心して使用することができ、環境ホルモンを放出しないという環境親和的な特徴がある。さらには、本発明のｎｏｎ−ＰＶＣ消しゴム組成物は、既存ＰＶＣ消しゴムと比べても字消去性能が優れており、消しゴム本来の機能を充分に発揮することができる。
The present invention will be described in detail below.
Since the eraser composition of the present invention does not use the PVC used for the existing eraser, no harmful substances such as phthalate plasticizers, formaldehyde , lead are detected, and it is non-toxic and can be used safely by children. It has environmentally friendly characteristics that it does not release environmental hormones Furthermore, the non-PVC eraser composition of the present invention is superior in character erasing performance as compared with existing PVC erasers, and can fully exhibit the original function of the eraser.
本発明のｎｏｎ−ＰＶＣ消しゴム組成物は、スチレン−ブタジエン−スチレン、ニトリルブタジエンラバー及びポリスチレンで形成される熱可塑性エラストマ、ワックス、ミネラルオイル、炭酸カルシウム（ＣａＣＯ３）、酸化マグネシウム（ＭｇＯ）及び二酸化チタン（ＴｉＯ２）を含む。 Non-PVC eraser composition of the present invention, a styrene - butadiene - styrene, thermoplastic elastomer formed of nitrile-butadiene rubber and polystyrene, waxes, mineral oil, calcium carbonate (CaCO 3), magnesium oxide (MgO) and dioxide Titanium (TiO 2 ) is included.
上記熱可塑性エラストマは、常温で含硫ゴムのようなゴム弾性を有し、高温で加熱すれば溶融可塑化されて通常のプラスチック成形機で成形加工が可能な高分子材料である。 The thermoplastic elastomer is a polymer material that has rubber elasticity like a sulfur-containing rubber at room temperature, is melt-plasticized when heated at a high temperature, and can be molded by an ordinary plastic molding machine.
本発明に使われる上記熱可塑性エラストマは、スチレン−ブタジエン−スチレン（ＳＢＳ、ｓｔｙｌｅｎｅ−ｂｕｔａｄｉｅｎｅ−ｓｔｙｌｅｎｅ）とニトリルブタジエンラバー（ＮＢＲ、ｎｉｔｒｉｌｅ ｂｕｔａｄｉｅｎｅ ｒｕｂｂｅｒ）及びポリスチレン（ＰＳ、ｐｏｌｙｓｔｙｌｅｎｅ）を混合して用いることができる。 The thermoplastic elastomer used in the present invention include styrene - butadiene - styrene (SBS, stylene-butadiene-stylene ) and nitrile-butadiene rubber (NBR, nitrile butadiene rubber) and polystyrene (PS, 10 polystyrene) using a mixture of Can do.
上記スチレン−ブタジエン−スチレンは、消しゴムに弾性を付与する作用をする。上記スチレン−ブタジエン−スチレンは、消しゴム組成物に６〜１５重量％で含まれるのが望ましい。その含有量が６重量％未満の場合には弾性を付与するスチレンブロックの生成が不可能で、最終生成された消しゴムがこわれやすく、常温での冷流れ現象で形状を維持することができない。また、１５重量％を超過する場合には消しゴムの弾性と強度が増加してダストが分離しないこともある。 The styrene -butadiene- styrene acts to impart elasticity to the eraser. The styrene -butadiene- styrene is preferably contained in the eraser composition at 6 to 15% by weight. When the content is less than 6% by weight, it is impossible to produce a styrene block that imparts elasticity, the final eraser is easily broken, and the shape cannot be maintained by a cold flow phenomenon at room temperature. Further, if it exceeds 15% by weight, the elasticity and strength of the eraser may increase and dust may not be separated.
上記ニトリルブタジエンラバーは、消しゴムに粘性を付与する作用をする。上記ニトリルブタジエンラバーは消しゴム組成物に５〜１５重量％で含まれるのが望ましい。その含有量が５重量％未満の場合には消しゴムの粘性がなくなり消しゴムのダストが固められず、１５重量％を超過する場合には消しゴムの粘性に比例してストレーンが増加することによって消しゴム使用の時ダストが消しゴム本体に付いて増えるだけ分離しないこともある。 The nitrile butadiene rubber acts to impart viscosity to the eraser. The nitrile butadiene rubber is desirably contained in the eraser composition at 5 to 15% by weight. If the content is less than 5% by weight, the eraser will lose its viscosity and the eraser dust will not harden. If it exceeds 15% by weight, the strain will increase in proportion to the viscosity of the eraser. Sometimes dust does not separate as much as it sticks to the eraser body.
上記ポリスチレンは、消しゴム組成物に１〜６重量％で含まれるのが望ましい。その含有量が１重量％未満の場合には消しゴムの消し性（字消去性能）が低下し、６重量％を超過する場合には消しゴム硬度の許容範囲を超過して使用することができない。 The polystyrene is desirably contained in 1-6 wt% in the eraser composition. When the content is less than 1% by weight, the eraser (character erasing performance) of the eraser is deteriorated, and when it exceeds 6% by weight, the eraser hardness cannot exceed the allowable range.
上記のような含有量で含まれるスチレン−ブタジエン−スチレン、ニトリルブタジエンラバー及びポリスチレンで形成される熱可塑性エラストマは、消しゴム組成物に１０〜４０重量％で含まれるのが望ましい。その含有量が上記範囲内の場合には製造される消しゴムに適当な硬度を付与することができるのでさらに良い。 Styrene is included in an amount as described above - butadiene - styrene, thermoplastic elastomer formed of nitrile-butadiene rubber and polystyrene are desirably contained 10 to 40% by weight eraser composition. If the content is within the above range, it is even better because an appropriate hardness can be imparted to the manufactured eraser.
上記熱可塑性エラストマは、スチレン−ブタジエン−スチレン、ニトリルブタジエンラバー及びポリスチレン以外にスチレン−ブタジエンコーポリマー（ＳＢＲ）、スチレン−イソプレン（ｓｔｙｒｅｎｅ−ｉｓｏｐｒｅｎｅ）コーポリマー、スチレン−エチレン−ブタジエン（ｓｔｙｒｅｎｅ−ｅｔｈｙｌｅｎｅ−ｂｕｔｈｙｌｅｎｅ）コーポリマー、スチレン−エチレン−プロピレン（ｓｔｙｒｅｎｅ−ｅｔｈｙｌｅｎｅ−ｐｒｏｐｙｌｅｎｅ）コーポリマーなどのスチレン系熱可塑性樹脂や熱可塑性エラストマと一緒に混合して用いることもできる。 The thermoplastic elastomer, a styrene - butadiene - styrene, styrene besides nitrile butadiene rubber and polystyrene - butadiene copolymer (SBR), styrene - isoprene (styrene-isoprene) copolymers, styrene - ethylene - butadiene (styrene-ethylene- Buthylene) copolymers, styrene - ethylene - may propylene (styrene-ethylene-propylene) be mixed with the styrene-based thermoplastic resins or thermoplastic elastomers such as copolymers.
上記ワックスは液状であった方が良く、消しゴムに含有される他の組成物の溶融温度を低下させて製品の加工温度を低下させ、流れ性を付与する作用をする。 The wax should be in the form of a liquid and acts to lower the processing temperature of the product by lowering the melting temperature of the other composition contained in the eraser and to impart flowability.
上記ワックスは、消しゴム組成物に１〜５重量％で含まれるのが望ましく、その含有量が上記範囲内の場合には適切な加工温度と流れ性を付与して、消しゴムの硬度を適切に維持することができる。 The wax is desirably contained in the eraser composition in an amount of 1 to 5% by weight. When the content is within the above range, an appropriate processing temperature and flowability are imparted to appropriately maintain the hardness of the eraser. can do.
上記ミネラルオイルは、軟化剤として作用をして、その含有量は消しゴム組成物に５〜２０重量％で含まれるのが望ましい。上記ミネラルオイルが上記範囲内の場合には、適正量のミネラルオイルが用いられて消しゴム製造の時ブリードアウトなしに適当な軟化をさせることができる。 The mineral oil acts as a softening agent, and its content is desirably contained in the eraser composition at 5 to 20% by weight. When the mineral oil is within the above range, an appropriate amount of mineral oil can be used, and appropriate softening can be achieved without bleed-out when producing an eraser.
上記炭酸カルシウム（ＣａＣＯ３）、酸化マグネシウム（ＭｇＯ）及び二酸化チタン（ＴｉＯ２）はそれぞれ充填剤として用いられ、上記炭酸カルシウム、酸化マグネシウム及び二酸化チタン以外にシリカ、アルミナ、規藻土、ガラス（ｇｌａｓｓ）、タルク、セリサイト、石英粉末、モンモリルロナイト、ホタテガイ、オイスター、しじみなどの貝殻粉末、卵殻粉末、有機中共粒子、無機中共粒子など通常の充填剤と混合して用いることもできる。 The calcium carbonate (CaCO 3 ), magnesium oxide (MgO), and titanium dioxide (TiO 2 ) are used as fillers, respectively. ), Shell powder such as talc, sericite, quartz powder, montmorillonite, scallop, oyster, shijimi, etc., eggshell powder, organic co-particles, inorganic co-particles, etc.
上記炭酸カルシウム（ＣａＣＯ３）、酸化マグネシウム（ＭｇＯ）及び二酸化チタン（ＴｉＯ２）は、それぞれ消しゴム組成物に５０〜７０重量％、０．１〜５ｐｈｒ、０．５〜５ｐｈｒで含まれるのが望ましい。その含有量が上記範囲内の場合、十分なゴム弾性が発揮されて消しゴム本来の字消去性能を最大限発揮することができる。 The calcium carbonate (CaCO 3 ), magnesium oxide (MgO), and titanium dioxide (TiO 2 ) are desirably contained in the eraser composition at 50 to 70 wt%, 0.1 to 5 phr, and 0.5 to 5 phr, respectively. . When the content is within the above range, sufficient rubber elasticity is exhibited and the original erase performance of the eraser can be maximized.
上記のような成分で形成される本発明のｎｏｎ−ＰＶＣ消しゴム組成物は上記成分以外に加工油（ｐｒｏｃｅｓｓ ｏｉｌ）、ポリブチレン（ｐｏｌｙｂｕｔｙｌｅｎｅ）、熱消化パラフィン（ｃｈｌｏｒｉｎａｔｅｄ ｐａｒａｆｆｉｎ）、液化パラフィンなどの軟化剤、着色剤、香料、安定剤、潤潤滑剤、上記スチレン−ブタジエン−スチレン、ニトリルブタジエンラバー及びポリスチレン以外の熱可塑性樹脂や熱可塑性エラストマなどを追加してさらに含むこともできる。 In addition to the above components, the non-PVC eraser composition of the present invention formed with the above components is a processing oil, a polybutylene , a heat digestible paraffin, a softening agent such as liquefied paraffin, colorants, flavors, stabilizers, Jun lubricants, the styrene - butadiene - styrene may further additionally comprise a thermoplastic resin or thermoplastic elastomer other than the nitrile butadiene rubber and polystyrene.
上記のような消しゴム組成物を使った本発明のｎｏｎ−ＰＶＣ消しゴムは、上記消しゴム組成物をプレス成形、射出成形、圧出成形などによって成形して、所定の寸法で裁断して製品に製造される。 The non-PVC eraser of the present invention using the eraser composition as described above is manufactured into a product by molding the eraser composition by press molding, injection molding, extrusion molding or the like, and cutting it to a predetermined size. The
具体的には、上記の消しゴム組成物をシリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で、１５〜２５ｒｐｍの成形速度に圧出成形して、所定の寸法で裁断して本発明のｎｏｎ−ＰＶＣ消しゴムを製造することができる。 Specifically, the above eraser composition is subjected to extrusion molding at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. at a molding speed of 15 to 25 rpm. The non-PVC eraser of the present invention can be produced by cutting with dimensions.
上記のように得られる本発明のｎｏｎ−ＰＶＣ消しゴムは、塩化ビニル樹脂（ＰＶＣ）を用いずとも、字消去性能が優れ、消しゴム本来の機能を充分に発揮することができる。また、フタレート系可塑剤、ホルムアルデヒド、鉛など人体有害物質が検出されず、無毒であり、子供たちも安心して使用することができ、環境ホルモンを放出しないため環境親和的である。 The non-PVC eraser of the present invention obtained as described above has excellent character erasing performance and can fully exhibit the original function of the eraser without using a vinyl chloride resin (PVC). In addition, no harmful substances such as phthalate plasticizer, formaldehyde , lead, etc. are detected, it is non-toxic, it can be used safely by children, and it is environmentally friendly because it does not release environmental hormones.
以下では実施例を通じて本発明に関してさらに詳細に説明するが、これら実施例は、単なる説明を目的としており、本発明の保護範囲を制限するものではない。 In the following, the present invention will be described in more detail with reference to examples. However, these examples are for illustrative purposes only and do not limit the protection scope of the present invention.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１０重量％、ニトリルブタジエンラバー７重量％及びポリスチレン２重量％とワックス３重量％、ミネラルオイル１５重量％、炭酸カルシウム（ＣａＣＯ３）６３重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 10% by weight, nitrile butadiene rubber 7% by weight, polystyrene 2% by weight and wax 3% by weight, mineral oil 15% by weight, calcium carbonate (CaCO 3 ) 63% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１３重量％、ニトリルブタジエンラバー６重量％及びポリスチレン３重量％とワックス２重量％、ミネラルオイル１５重量％、炭酸カルシウム（ＣａＣＯ３）６１重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 13% by weight, nitrile butadiene rubber 6% by weight, polystyrene 3% by weight and wax 2% by weight, mineral oil 15% by weight, calcium carbonate (CaCO 3 ) 61% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
ポリ塩化ビニル（ＰＶＣ）樹脂２６重量％と、天然可塑剤３０重量％、炭酸カルシウム（ＣａＣＯ３）４４重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１８〜３０ｒｐｍの成形速度で圧出成形してＰＶＣ消しゴムを製造した。 After kneading 26% by weight of polyvinyl chloride (PVC) resin, 30% by weight of natural plasticizer, 44% by weight of calcium carbonate (CaCO 3 ), 2 phr of magnesium oxide (MgO) and 2 phr of titanium dioxide (TiO 2 ), a cylinder temperature of 65 A PVC eraser was produced by extrusion molding at a molding speed of 18-30 rpm at a temperature of ˜85 ° C., a die temperature of 50-60 ° C., and a head temperature of 60-70 ° C.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１８重量％、ニトリルブタジエンラバー６重量％及びポリスチレン３重量％とワックス２重量％、ミネラルオイル１５重量％、炭酸カルシウム（ＣａＣＯ３）５６重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene thermoplastic elastomer - butadiene - styrene 18 wt%, nitrile-butadiene rubber 6 wt% and polystyrene 3 wt% wax 2% by weight, mineral oil 15 wt%, calcium carbonate (CaCO 3) 56 wt% of magnesium oxide (MgO ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１０重量％、ニトリルブタジエンラバー４重量％及びポリスチレン３重量％とワックス３重量％、ミネラルオイル１５重量％、炭酸カルシウム（ＣａＣＯ３）６５重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 10% by weight, nitrile butadiene rubber 4% by weight, polystyrene 3% by weight and wax 3% by weight, mineral oil 15% by weight, calcium carbonate (CaCO 3 ) 65% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン８重量％、ニトリルブタジエンラバー１６重量％及びポリスチレン１重量％とワックス２重量％、ミネラルオイル１０重量％、炭酸カルシウム（ＣａＣＯ３）６３重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 8% by weight, nitrile butadiene rubber 16% by weight, polystyrene 1% by weight and wax 2% by weight, mineral oil 10% by weight, calcium carbonate (CaCO 3 ) 63% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１０重量％、ニトリルブタジエンラバー７重量％及びポリスチレン０重量％とワックス２重量％、ミネラルオイル１８重量％、炭酸カルシウム（ＣａＣＯ３）６３重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 10% by weight, nitrile butadiene rubber 7% by weight, polystyrene 0% by weight and wax 2% by weight, mineral oil 18% by weight, calcium carbonate (CaCO 3 ) 63% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１０重量％、ニトリルブタジエンラバー６重量％及びポリスチレン８重量％とワックス２重量％、ミネラルオイル１４重量％、炭酸カルシウム（ＣａＣＯ３）６０重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 10% by weight, nitrile butadiene rubber 6% by weight, polystyrene 8% by weight and wax 2% by weight, mineral oil 14% by weight, calcium carbonate (CaCO 3 ) 60% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン１０重量％、ニトリルブタジエンラバー６重量％及びポリスチレン２重量％とワックス０重量％、ミネラルオイル１７重量％、炭酸カルシウム（ＣａＣＯ３）６５重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 10% by weight, nitrile butadiene rubber 6% by weight, polystyrene 2% by weight and wax 0% by weight, mineral oil 17% by weight, calcium carbonate (CaCO 3 ) 65% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン５重量％、ニトリルブタジエンラバー５重量％及びポリスチレン１重量％とワックス２重量％、ミネラルオイル２２重量％、炭酸カルシウム（ＣａＣＯ３）６５重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 5% by weight, nitrile butadiene rubber 5% by weight, polystyrene 1% by weight and wax 2% by weight, mineral oil 22% by weight, calcium carbonate (CaCO 3 ) 65% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
熱可塑性エラストマでスチレン−ブタジエン−スチレン８重量％、ニトリルブタジエンラバー５重量％及びポリスチレン２重量％とワックス２重量％、ミネラルオイル１３重量％、炭酸カルシウム（ＣａＣＯ３）７０重量％、酸化マグネシウム（ＭｇＯ）２ｐｈｒ及び二酸化チタン（ＴｉＯ２）２ｐｈｒを混練後、シリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度で圧出成形してｎｏｎ−ＰＶＣ消しゴムを製造した。 Styrene -butadiene- styrene 8% by weight, nitrile butadiene rubber 5% by weight, polystyrene 2% by weight and wax 2% by weight, mineral oil 13% by weight, calcium carbonate (CaCO 3 ) 70% by weight, magnesium oxide (MgO) ) After kneading 2 phr and 2 phr of titanium dioxide (TiO 2 ), it was subjected to extrusion molding at a molding temperature of 15 to 25 rpm at a cylinder temperature of 65 to 85 ° C., a die temperature of 50 to 60 ° C., and a head temperature of 60 to 70 ° C. -A PVC eraser was produced.
上記表１及び表３に示すように、本発明による実施例１及び実施例２の消しゴムは比較例１ないし９と比べて外観状態、色相、消し率、紙の皺め、硬度、移行性、残物の生成程度及び成形性能において、すべて優れた結果を示した。 As shown in Table 1 and Table 3 above, the eraser of Examples 1 and 2 according to the present invention has an appearance state, hue, erase rate, paper crease, hardness, transferability, as compared with Comparative Examples 1 to 9. Excellent results were obtained with respect to the degree of residue formation and molding performance.
なお、上述の説明では、望ましい実施例として説明したが、これに限定されず、発明の概念から逸脱することなく、多様な修正や変形を加えることが可能である。また、添付された請求範囲は本発明の概念に属する修正や変形を含むものである。 In the above description, the preferred embodiment has been described. However, the present invention is not limited to this, and various modifications and variations can be made without departing from the concept of the invention. Further, the appended claims include modifications and variations belonging to the concept of the present invention.
Claims (4)
ｎｏｎ−ＰＶＣ消しゴム組成物。 Styrene - butadiene - styrene, thermoplastic elastomer is formed by nitrile-butadiene rubber and polystyrene; waxes; mineral oil; calcium carbonate (CaCO 3); magnesium oxide (MgO); and titanium dioxide (TiO 2); in that it comprises A non-PVC eraser composition.
スチレン−ブタジエン−スチレン６〜１５重量％、ニトリルブタジエンラバー５〜１５重量％及びポリスチレン１〜６重量％で形成される熱可塑性エラストマ１０〜４０重量％；ワックス１〜５重量％；ミネラルオイル５〜２０重量％；炭酸カルシウム（ＣａＣＯ３）５０〜７０重量％；酸化マグネシウム（ＭｇＯ）０．１〜５ｐｈｒ；及び二酸化チタン（ＴｉＯ２）０．５〜５ｐｈｒ；を含むことを特徴とする
ｎｏｎ−ＰＶＣ消しゴム組成物。 In claim 1,
Styrene - butadiene - styrene 6-15 wt%, 5-15 wt% nitrile butadiene rubber and a thermoplastic elastomer 10 to 40 wt% formed in the polystyrene 1-6 wt%; waxes 1-5 wt%; mineral oil 5 20 wt%; calcium carbonate (CaCO 3) 50-70 wt%; magnesium oxide (MgO) 0.1~5phr; and titanium dioxide (TiO 2) 0.5 to 5 phr; characterized in that it comprises a non- PVC eraser composition.
上記消しゴム組成物は充填剤、加工油（ｐｒｏｃｅｓｓ ｏｉｌ）、ポリブチレン（ｐｏｌｙｂｕｔｙｌｅｎｅ）、軟化剤、着色剤、香料、安定剤、潤滑剤及びスチレン−ブタジエンコーポリマー（ＳＢＲ）、スチレン−イソプレン（ｓｔｙｒｅｎｅ−ｉｓｏｐｒｅｎｅ）コーポリマー、スチレン−エチレン−ブタジエン（ｓｔｙｒｅｎｅ−ｅｔｈｙｌｅｎｅ−ｂｕｔｈｙｌｅｎｅ）コーポリマー、スチレン−エチレン−プロピレン（ｓｔｙｒｅｎｅ−ｅｔｈｙｌｅｎｅ−ｐｒｏｐｙｌｅｎｅ）コーポリマーの中で選択されたどれか一つ以上の添加剤をさらに含むことを特徴にする
ｎｏｎ−ＰＶＣ消しゴム組成物。 In claim 1 ,
The eraser composition fillers, processing oil (process oil), polybutylene (polybutylene), softening agents, colorants, flavors, stabilizers, lubricants and styrene - butadiene copolymer (SBR), styrene - isoprene (Styrene- one or more additives selected from among an isoprene copolymer, a styrene-ethylene-butadiene copolymer, and a styrene-ethylene-propylene copolymer. A non-PVC eraser composition characterized by comprising.
上記消しゴム組成物はシリンダー温度６５〜８５℃、ダイス温度５０〜６０℃、ヘッド温度６０〜７０℃の温度で１５〜２５ｒｐｍの成形速度に圧出成形することを特徴にする
ｎｏｎ−ＰＶＣ消しゴム組成物。
In claim 1 ,
The eraser composition is a non-PVC eraser composition characterized by being subjected to extrusion molding at a cylinder temperature of 65 to 85 ° C, a die temperature of 50 to 60 ° C, and a head temperature of 60 to 70 ° C and a molding speed of 15 to 25 rpm. .
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3005332C2 (en) * | 1980-02-13 | 1982-06-03 | Fa. J.S. Staedtler, 8500 Nürnberg | Eraser with thermoplastic binder |
| JP2671319B2 (en) * | 1987-07-31 | 1997-10-29 | ぺんてる株式会社 | Eraser composition |
| JPH05124391A (en) * | 1991-10-30 | 1993-05-21 | Pentel Kk | Eraser |
| JPH05147392A (en) * | 1991-11-29 | 1993-06-15 | Pentel Kk | Eraser |
| JP3134471B2 (en) * | 1992-02-28 | 2001-02-13 | ぺんてる株式会社 | eraser |
| JPH0672097A (en) * | 1992-08-27 | 1994-03-15 | Pentel Kk | Eraser |
| JP3450053B2 (en) * | 1994-04-20 | 2003-09-22 | 株式会社シード | Eraser |
| JPH11334288A (en) * | 1998-05-26 | 1999-12-07 | Kotobuki:Kk | Eraser |
| JP3913021B2 (en) * | 2001-10-05 | 2007-05-09 | 株式会社シード | Erasure |
| JP3913030B2 (en) * | 2001-10-26 | 2007-05-09 | 株式会社シード | Erasure |
| JP4517168B2 (en) * | 2003-12-11 | 2010-08-04 | 株式会社シード | Erasure |
| JP2005219397A (en) * | 2004-02-06 | 2005-08-18 | Nippon Zeon Co Ltd | Eraser |
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