JPH04288355A - Composition - Google Patents
CompositionInfo
- Publication number
- JPH04288355A JPH04288355A JP7560391A JP7560391A JPH04288355A JP H04288355 A JPH04288355 A JP H04288355A JP 7560391 A JP7560391 A JP 7560391A JP 7560391 A JP7560391 A JP 7560391A JP H04288355 A JPH04288355 A JP H04288355A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- propylene
- styrene
- sheet
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 19
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229920001155 polypropylene Polymers 0.000 claims abstract description 27
- 229920001577 copolymer Polymers 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims description 27
- 239000000088 plastic resin Substances 0.000 claims 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract description 10
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract description 10
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 4
- 239000011342 resin composition Substances 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 229920005992 thermoplastic resin Polymers 0.000 abstract description 2
- 239000011256 inorganic filler Substances 0.000 description 16
- 229910003475 inorganic filler Inorganic materials 0.000 description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- -1 styrene-ethylene-butylene-styrene Chemical class 0.000 description 7
- 239000004793 Polystyrene Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 238000007666 vacuum forming Methods 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001519 homopolymer Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 229920001384 propylene homopolymer Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 235000014692 zinc oxide Nutrition 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910000004 White lead Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 229920006127 amorphous resin Polymers 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000012661 block copolymerization Methods 0.000 description 1
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229920000578 graft copolymer Polymers 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920006132 styrene block copolymer Polymers 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、真空成形、圧空成形、
及び熱板加熱式圧空成形等のシートの二次加工性に優れ
、成形体の剛性が著しく改良されたプロピレン系樹脂組
成物に関する。[Industrial Application Field] The present invention is applicable to vacuum forming, pressure forming,
The present invention also relates to a propylene resin composition that has excellent sheet fabrication properties such as hot plate heating and pressure forming, and has significantly improved rigidity of molded articles.
【０００２】0002
【従来の技術】プロピレン系重合体は、成形加工性が良
好なこと、柔軟性が優れていること、軟化点が高いこと
などの優れた特徴があり、種々の形状に成形され多くの
用途分野で使用されている。その一つとしてフィルム状
、シート状に成形されたものは、真空成形、圧空成形及
び熱板圧空成形等によって二次成形加工され、各種容器
に広く用いられている。[Prior Art] Propylene polymers have excellent characteristics such as good moldability, excellent flexibility, and high softening point, and can be molded into various shapes and used in many fields of application. used in As one of them, those formed into films and sheets are subjected to secondary molding processing by vacuum forming, pressure forming, hot plate pressure forming, etc., and are widely used for various containers.
【０００３】しかし、プロピレン系重合体は高い結晶性
のため押出成形等によって得られたシートを各種形状に
賦形するための真空成形や圧空成形等の二次加工適性に
於いてスチレン系重合体の様な非晶性樹脂と比較して温
度変化に伴って樹脂粘度特性が急激に変化するため、加
熱工程での半溶融シートの垂下変形量が大きくなり、垂
下したシートが加熱ヒーターに接触する様な問題や加熱
時間が長いことによる生産性の問題又は、均一な肉厚分
布に賦形可能な温度範囲が狭すぎて、通常の真空成形機
で実用が困難な場合もある。よって精度の高い温度制御
が必要であり、生産性に制限を受けることがある。However, due to the high crystallinity of propylene polymers, styrene polymers are less suitable for secondary processing such as vacuum forming and pressure forming, which are used to shape sheets obtained by extrusion molding into various shapes. Compared to amorphous resins such as, the resin viscosity changes rapidly with temperature changes, so the amount of drooping deformation of the semi-molten sheet during the heating process increases, and the drooping sheet comes into contact with the heating heater. In some cases, it may be difficult to put it into practical use with a normal vacuum forming machine due to such problems, productivity problems due to long heating times, or the temperature range in which forming into a uniform wall thickness distribution is too narrow. Therefore, highly accurate temperature control is required, which may limit productivity.
【０００４】以上の問題点をふまえて、樹脂物性面でプ
ロピレン系重合体をスチレン系重合体と比較すると、剛
性、耐衝撃性が劣っているものの、耐熱性、耐油性につ
いては、スチレン系重合体に比べて優れている。従って
、プロピレン系重合体の長所とスチレン系重合体の長所
とを併せ持った複合材料が開発出来れば、新分野の用途
開発が可能となる。In view of the above problems, when propylene polymers are compared with styrene polymers in terms of resin physical properties, although they are inferior in rigidity and impact resistance, they are superior to styrene polymers in terms of heat resistance and oil resistance. Better than combination. Therefore, if a composite material that combines the advantages of propylene-based polymers and styrene-based polymers can be developed, it will become possible to develop applications in new fields.
【０００５】しかしながら、プロピレン系重合体とスチ
レン系重合体は、相互に非相溶性であるため、単に混合
しただけでは両樹脂の界面接着が乏しい上、スチレン系
重合体の分散が不十分で、且つスチレン系重合体のドメ
インが成形時の溶融流れ方向に大きく変形してしまうの
で、得られる成形品の剛性、耐衝撃性等の機械的性質は
不満足なものとなり実用性に乏しい。また、同混合物は
熱成形性についてもプロピレン系単独重合体から得られ
るシートに比較しては改善されるが、未だ均一な肉厚分
布に真空成形するための成形温度範囲が狭かったり、加
熱時間が長すぎるといった問題が残り、実用性に乏しい
。However, since propylene polymers and styrene polymers are mutually incompatible, simply mixing them will not only result in poor interfacial adhesion between the two resins, but will also result in insufficient dispersion of the styrene polymers. In addition, since the domains of the styrene polymer are largely deformed in the direction of melt flow during molding, the resulting molded product has unsatisfactory mechanical properties such as rigidity and impact resistance, making it impractical. In addition, although the thermoformability of the same mixture is improved compared to sheets obtained from propylene-based homopolymers, the forming temperature range for vacuum forming with uniform wall thickness distribution is still narrow, and the heating time is still limited. However, there remains the problem that the length of time is too long, making it impractical.
【０００６】従って、これらの２次加工適性及び物性バ
ランスを改善すべく、プロピレン系重合体とスチレン系
重合体の相溶性を向上させるために第三成分の添加が検
討されている。例えば、特開昭６４−９２５６などに見
られる如く、第三成分として、スチレン−エチレン・ブ
チレン−スチレンブロック共重合体（以下ＳＥＢＳと略
）を用いて相溶性を向上させた例がいくつか見られる。
しかし、この方法はＳＥＢＳの添加量と共に耐衝撃性は
向上する反面、剛性は急激に低下するため、物性バラン
スをとるのが難しく、実用性に乏しい。[0006] Therefore, in order to improve the suitability for secondary processing and the balance of physical properties, the addition of a third component is being considered in order to improve the compatibility between the propylene polymer and the styrene polymer. For example, as seen in JP-A No. 64-9256, there are some examples of improving compatibility by using a styrene-ethylene-butylene-styrene block copolymer (hereinafter abbreviated as SEBS) as the third component. It will be done. However, in this method, although the impact resistance improves as the amount of SEBS added, the rigidity rapidly decreases, making it difficult to balance the physical properties and lacking in practicality.
【０００７】また、特開昭５４−５０５５４等に見られ
る如く、芳香族ビニル単量体をグラフト共重合させたエ
チレン−酢酸ビニル共重合体を第三成分として添加する
方法が提案されている。しかし、耐衝撃性や剛性の改善
が不十分であったり、材料強度に方向性が生じて満足な
強度のものが得られないために好ましくない。さらに、
特開昭５９−２１７７４２等に見られる如く、スチレン
で改質したプロピレン重合体を用いて相溶性及び物性の
改善を試みた例が提案されている。しかし、実用の包装
用材料としての物性、特に耐衝撃性が不十分であり、満
足な材料強度が得られているとはいえない。Furthermore, as seen in JP-A-54-50554, a method has been proposed in which an ethylene-vinyl acetate copolymer obtained by graft copolymerizing an aromatic vinyl monomer is added as a third component. However, this is not preferable because impact resistance and rigidity are not sufficiently improved, or material strength becomes directional, making it impossible to obtain satisfactory strength. moreover,
As seen in JP-A-59-217742, examples have been proposed in which attempts were made to improve compatibility and physical properties using a propylene polymer modified with styrene. However, the physical properties, particularly the impact resistance, are insufficient for use as a practical packaging material, and it cannot be said that satisfactory material strength is obtained.
【０００８】[0008]
【発明が解決しようとする課題】以上述べたようにプロ
ピレン系重合体とスチレン系重合体との混合樹脂は、多
くの問題をかかえている。よって本発明が解決しようと
する課題を列記すると、以下のようになる。
（１）相溶性及び界面接着性
（２）成形性（シート成形性及び真空成形性）（３）剛
性及び耐衝撃性[Problems to be Solved by the Invention] As described above, mixed resins of propylene polymers and styrene polymers have many problems. Therefore, the problems to be solved by the present invention are listed as follows. (1) Compatibility and interfacial adhesion (2) Formability (sheet formability and vacuum formability) (3) Rigidity and impact resistance
【０００９】[0009]
【課題を解決するための手段】本発明にしたがえば、こ
れらの課題は、プロピレン系重合体５〜９５重量％、ス
チレン系重合体５〜９５重量％の合計１００重量部に対
してプロピレン−スチレン系共重合体１〜３０重量部か
らなることを特徴とする樹脂組成物、によって解決する
ことができる。以下、本発明を具体的に説明する。[Means for Solving the Problems] According to the present invention, these problems are solved by adding propylene to 100 parts by weight of a total of 5 to 95% by weight of propylene polymer and 5 to 95% by weight of styrene polymer. This problem can be solved by a resin composition characterized by comprising 1 to 30 parts by weight of a styrene copolymer. The present invention will be explained in detail below.
【００１０】（Ａ）プロピレン系重合体本発明において
使われるプロピレン系重合体としては、プロピレン単独
重合体、プロピレンと多くとも２０重量％（好ましくは
、１８重量％以下、好適には１５重量％）のエチレンお
よび／もしくは炭素数が多くとも１２個（望ましくは、
８個）の他のα−オレフィンをランダム又はブロック共
重合させることによって得られる共重合体があげられる
。(A) Propylene-based polymer The propylene-based polymer used in the present invention is a propylene homopolymer, propylene and at most 20% by weight (preferably 18% by weight or less, preferably 15% by weight). The number of ethylene and/or carbon atoms is at most 12 (preferably,
Examples include copolymers obtained by random or block copolymerization of other α-olefins (8).
【００１１】さらに、これらプロピレン系重合体とエチ
レンの単独重合体、エチレンと炭素数が３〜１２個のα
−オレフィンとの共重合体、炭素数が４〜６個のα−オ
レフィンの単独重合体などとの混合物および前記プロピ
レン系重合体どうしの混合物も含まれる。さらに、本発
明においてはこれらのプロピレン系重合体に少なくとも
１個の二重結合を有する化合物（たとえば、不飽和のカ
ルボン酸、ビニルシラン化合物）をグラフト重合するこ
とによって得られる変性ポリプロピレンも含まれる。こ
れらのプロピレン系重合体および変性ポリプロピレンは
、それぞれ単独で使用してもよく、２種以上併用しても
よい。また、これらのプロピレン系重合体および変性ポ
リプロピレンのうち、２種以上を任意の割合で樹脂ブレ
ンドとして用いてもよい。Furthermore, homopolymers of these propylene polymers and ethylene, ethylene and α having 3 to 12 carbon atoms
Copolymers with -olefins, mixtures with homopolymers of α-olefins having 4 to 6 carbon atoms, and mixtures of the propylene polymers are also included. Furthermore, the present invention also includes modified polypropylene obtained by graft polymerizing a compound having at least one double bond (for example, an unsaturated carboxylic acid, a vinyl silane compound) to these propylene-based polymers. These propylene polymers and modified polypropylenes may be used alone or in combination of two or more. Furthermore, two or more of these propylene polymers and modified polypropylene may be used in any proportion as a resin blend.
【００１２】さらに、これらのプロピレン系重合体にさ
らに無機充填剤を配合してもよく、無機充填剤は、一般
に合成樹脂およびゴムの分野において広く使われている
ものである。これらの無機充填剤としては、酸素および
水と反応しない無機化合物であり、混練時および成形時
において分解しないものが好んで用いられる。該無機充
填剤としては、アルミニウム、銅、鉄、鉛、ニッケル、
マグネシウム、カルシウム、バリウム、亜鉛、ジルコニ
ウム、モリブデン、ケイ素、アンチモン、チタンなどの
金属の酸化物、その水和物（水酸化物）、硫酸塩、炭酸
塩、ケイ酸塩のごとき化合物、これらの複塩ならびにこ
れらの混合物に大別される。該無機充填剤の代表例とし
ては、前記の酸化アルミニウム（アルミナ）、その水和
物、水酸化カルシウム、酸化マグネシウム（マグネシア
）、水酸化マグネシウム、酸化亜鉛（亜鉛華）、鉛丹お
よび鉛白のごとき鉛の酸化物、炭酸マグネシウム、炭酸
カルシウム、塩基性炭酸マグネシウム、ホワイトカーボ
ン、アスベスト、マイカ、タルク、ガラス繊維、ガラス
粉末、ガラスビーズ、クレー、ケイソウ土、シリカ、ワ
ラストナイト、酸化鉄、酸化アンチモン、酸化チタン（
チタニア）、リトボン、軽石粉、硫酸アルミニウム（石
膏など）、ケイサンジルコニウム、酸化ジルコニウム、
炭酸バリウム、ドロマイト、二硫化モリブデンおよび砂
鉄があげられる。これらの無機充填剤のうち、粉末状の
ものはその径が２０μｍ以下（好適には１０μｍ 以下
）のものが好ましい。また繊維状のものでは、径が１〜
５００μｍ （好適には１〜３００μｍ ）であり、長
さが０．１〜６ｍｍ（好適には０．１〜５ｍｍ）のもの
が望ましい。さらに、平板状のものは径が３０μｍ 以
下（好適には１０μｍ 以下）のものが好ましい。これ
らの無機充填剤のうち、特に平板状（フレーク状）のも
のおよび粉末状のものが好適である。[0012] Furthermore, an inorganic filler may be further blended with these propylene polymers, and the inorganic filler is generally one widely used in the fields of synthetic resins and rubber. These inorganic fillers are preferably inorganic compounds that do not react with oxygen and water and do not decompose during kneading and molding. The inorganic fillers include aluminum, copper, iron, lead, nickel,
Metal oxides such as magnesium, calcium, barium, zinc, zirconium, molybdenum, silicon, antimony, and titanium, as well as their hydrates (hydroxides), sulfates, carbonates, and compounds such as silicates. It is broadly classified into salt and mixtures thereof. Typical examples of the inorganic fillers include the aforementioned aluminum oxide (alumina), its hydrate, calcium hydroxide, magnesium oxide (magnesia), magnesium hydroxide, zinc oxide (zinc white), red lead, and white lead. Lead oxides such as magnesium carbonate, calcium carbonate, basic magnesium carbonate, white carbon, asbestos, mica, talc, glass fiber, glass powder, glass beads, clay, diatomaceous earth, silica, wollastonite, iron oxide, oxidation Antimony, titanium oxide (
titania), litobone, pumice powder, aluminum sulfate (gypsum, etc.), silica zirconium, zirconium oxide,
These include barium carbonate, dolomite, molybdenum disulfide and iron sand. Among these inorganic fillers, those in powder form preferably have a diameter of 20 μm or less (preferably 10 μm or less). In addition, for fibrous materials, the diameter is 1~
500 μm (preferably 1 to 300 μm) and a length of 0.1 to 6 mm (preferably 0.1 to 5 mm). Further, it is preferable that the diameter of the flat plate is 30 μm or less (preferably 10 μm or less). Among these inorganic fillers, those in the form of flat plates (flake) and those in the form of powder are particularly suitable.
【００１３】前記プロピレン系重合体のメルトインデッ
クス〔ＪＩＳ Ｋ７２１０にしたがい、条件が１４で
測定、以下「ＭＩ（１）」と云う〕は、通常０．００５
〜１００ｇ／１０分であり、０．０１〜８０ｇ／１０分
のものが望ましく、とりわけ０．０２〜５０ｇ／１０分
のものが好適である。ＭＩ（１）が０．００５ｇ／１０
分未満のプロピレン系重合体を使用すると、流動性が悪
いために押出成形ができずシートの層を作ることができ
ない。一方、１００ｇ／１０分を超えたプロピレン系重
合体を使うならば、これらの共押出しシートを製造する
さいにドローダウンが大きく良好な製品を得ることがで
きない。[0013] The melt index of the propylene polymer [measured under conditions 14 according to JIS K7210, hereinafter referred to as "MI(1)"] is usually 0.005.
~100 g/10 minutes, preferably 0.01 to 80 g/10 minutes, particularly preferably 0.02 to 50 g/10 minutes. MI(1) is 0.005g/10
If less than 100% of the propylene polymer is used, extrusion molding cannot be performed due to poor fluidity, and sheet layers cannot be formed. On the other hand, if a propylene-based polymer exceeding 100 g/10 minutes is used, the drawdown will be large when producing these coextruded sheets, making it impossible to obtain a good product.
【００１４】なお、無機充填剤を配合する場合、プロピ
レン系重合体と無機充填剤との合計量中に占める無機充
填剤の配合割合は、一般には多くとも８０重量％であり
、７０重量％以下が好ましく、特に６０重量％以下が好
適である。これらの合計量中に占める無機充填剤の配合
割合が８０重量％を超えるならば、シートに成形する押
出成形が難しく良好なシートが得られない。[0014] When an inorganic filler is blended, the proportion of the inorganic filler in the total amount of the propylene polymer and the inorganic filler is generally at most 80% by weight, but not more than 70% by weight. is preferable, and 60% by weight or less is particularly preferable. If the proportion of the inorganic filler in the total amount exceeds 80% by weight, extrusion molding into a sheet is difficult and a good sheet cannot be obtained.
【００１５】（Ｂ）スチレン系重合体
本発明におけるスチレン系重合体とは、下記の一般式で
示される構造単位を樹脂中に少なくとも２５重量％以上
含有する樹脂である。(B) Styrenic polymer The styrenic polymer in the present invention is a resin containing at least 25% by weight of a structural unit represented by the following general formula.
【化１】
（ここでＲは水素原子またはメチル基を、Ｚはハロゲン
原子またはメチル基を、ｐは０または１〜３の整数であ
る。）具体的には、ポリスチレン、ゴム変性ポリスチレ
ン、スチレン−アクリロニトリル共重合体、スチレン−
ブタジエン−アクリロニトリル共重合体などで例示され
るスチレンおよびその誘導体の単独重合体および共重合
体が挙げられる。これらの樹脂にスチレン−共役ジエン
ブロック共重合ゴムおよびその水添物をブレンドしたも
のも適用される。[Formula 1] (Here, R is a hydrogen atom or a methyl group, Z is a halogen atom or a methyl group, and p is 0 or an integer of 1 to 3.) Specifically, polystyrene, rubber-modified polystyrene, styrene -Acrylonitrile copolymer, styrene-
Examples include homopolymers and copolymers of styrene and its derivatives, such as butadiene-acrylonitrile copolymers. Blends of these resins with styrene-conjugated diene block copolymer rubber and hydrogenated products thereof are also applicable.
【００１６】前記スチレン系重合体のメルトインデック
ス〔ＪＩＳ Ｋ７２１０にしたがい、条件が８で測定
、以下「ＭＩ（２）」と云う〕は、通常０．００５〜１
００ｇ／１０分であり、０．０１〜８０ｇ／１０分のも
のが望ましく、とりわけ０．０２〜５０ｇ／１０分のも
のが好適である。ＭＩ（２）が０．００５ｇ／１０分未
満のスチレン系重合体を使用すると、流動性が悪いため
に押出成形ができずシートの層を作ることができない。
一方、１００ｇ／１０分を超えたスチレン系重合体を使
うならば、これらの共押出しシートを製造するさいにド
ローダウンが大きく良好な製品を得ることができない。The melt index of the styrenic polymer [measured according to JIS K7210 under conditions 8, hereinafter referred to as "MI(2)"] is usually 0.005 to 1.
00 g/10 minutes, preferably 0.01 to 80 g/10 minutes, particularly preferably 0.02 to 50 g/10 minutes. If a styrenic polymer having an MI(2) of less than 0.005 g/10 minutes is used, extrusion molding cannot be performed due to poor fluidity, making it impossible to form a sheet layer. On the other hand, if a styrene polymer exceeding 100 g/10 minutes is used, the drawdown will be large when producing these coextruded sheets, making it impossible to obtain a good product.
【００１７】なお、無機充填剤を配合する場合、スチレ
ン系重合体と無機充填剤との合計量中に占める無機充填
剤の配合割合は、一般には多くとも８０重量％であり、
７０重量％以下が好ましく、特に６０重量％以下が好適
である。これらの合計量中に占める無機充填剤の配合割
合が８０重量％を超えるならば、シートに成形する押出
成形が難しく良好なシートが得られない。[0017] When an inorganic filler is blended, the proportion of the inorganic filler in the total amount of the styrene polymer and the inorganic filler is generally at most 80% by weight,
The content is preferably 70% by weight or less, particularly preferably 60% by weight or less. If the proportion of the inorganic filler in the total amount exceeds 80% by weight, extrusion molding into a sheet is difficult and a good sheet cannot be obtained.
【００１８】（Ｃ）プロピレン−スチレン系共重合体本
発明で用いるプロピレン−スチレン系共重合体は、プロ
ピレン重合体とスチレンをグラフト反応条件に付して得
られるグラフト共重合体（以下ＰＰ−ｇ−ＰＳと云う）
の他に、スチレン−エチレン・プロピレンブロック共重
合体（以下ＳＥＰと云う）でもよい。ＰＰ−ｇ−ＰＳは
、溶融グラフト、溶液グラフト、放射線グラフト、懸濁
法等、通常の反応法を用いることで得られるゴム状物質
であり、通常市販品例えば日本油脂（株）製モディパー
Ａ等を用いることができる。ＳＥＰは公知の方法（例え
ば特公昭６０−５７４６３号公報など）で得られるゴム
状物質であり、通常市販品例えばクラレ（株）製セプト
ン等を用いることができる。(C) Propylene-styrene copolymer The propylene-styrene copolymer used in the present invention is a graft copolymer (hereinafter referred to as PP-g) obtained by subjecting a propylene polymer and styrene to graft reaction conditions. -PS)
Besides, styrene-ethylene-propylene block copolymer (hereinafter referred to as SEP) may be used. PP-g-PS is a rubbery substance that can be obtained using ordinary reaction methods such as melt grafting, solution grafting, radiation grafting, and suspension methods, and is usually commercially available, such as Modiper A manufactured by NOF Corporation. can be used. SEP is a rubbery substance obtained by a known method (for example, Japanese Patent Publication No. 60-57463), and a commercially available product such as Septon manufactured by Kuraray Co., Ltd. can be used.
【００１９】該ＰＰ−ｇ−ＰＳ及びＳＥＰはスチレンの
含有量が１０〜４０重量％であり、溶液粘度（２５重量
％トルエン容器ａｔ２５℃）が１００〜５０，０００ｃ
ｐｓ の特性を有するものである。溶液粘度が１００ｃ
ｐｓ 未満では流動性が高く混練組成物での相溶性が不
良となり耐衝撃性の向上効果が得られず、また成形シー
ト表面の剥離現象が見られ、外観性が低下する。また、
溶液粘度が５０，０００ｃｐｓ を超えると流動性が悪
く、混練組成物での相溶性が低下し、前記現象が発現す
るために好ましくない。The PP-g-PS and SEP have a styrene content of 10 to 40% by weight, and a solution viscosity (25% by weight toluene container at 25°C) of 100 to 50,000c.
It has the characteristics of ps. Solution viscosity is 100c
If it is less than ps, the fluidity will be high and the compatibility in the kneaded composition will be poor, and the effect of improving impact resistance will not be obtained, and a peeling phenomenon will be observed on the surface of the molded sheet, and the appearance will deteriorate. Also,
If the solution viscosity exceeds 50,000 cps, the fluidity will be poor, the compatibility in the kneaded composition will be reduced, and the above phenomenon will occur, which is not preferable.
【００２０】（Ｄ）組成物の混合割合とその製造本発明
の混合組成物に使われる各重合体の混合割合は、プロピ
レン系重合体５〜９５重量％とスチレン系重合体５〜９
５重量％の合計１００重量部に対してプロピレン−スチ
レン系共重合体１〜３０重量部であり、２〜２０重量部
のものが望ましく、とりわけ５〜１５重量部のものが好
適である。混合組成物中におけるプロピレン系重合体の
割合が５重量％未満では、耐衝撃性の向上効果が得られ
ず、一方、９５重量％を超えると十分な剛性が得られず
、実用に供さない。また、混合組成物中におけるスチレ
ン系重合体の割合が５重量％未満では、剛性の向上効果
が得られず、一方、９５重量％を超えると、耐衝撃性が
著しく悪化するため実用に供さない。(D) Mixing ratio of the composition and its production The mixing ratio of each polymer used in the mixed composition of the present invention is 5 to 95% by weight of the propylene polymer and 5 to 9% by weight of the styrene polymer.
The amount of the propylene-styrene copolymer is 1 to 30 parts by weight, preferably 2 to 20 parts by weight, and particularly preferably 5 to 15 parts by weight, based on a total of 100 parts by weight of 5% by weight. If the proportion of the propylene polymer in the mixed composition is less than 5% by weight, no effect of improving impact resistance can be obtained, while if it exceeds 95% by weight, sufficient rigidity cannot be obtained and it cannot be used for practical use. . Furthermore, if the proportion of the styrene polymer in the mixed composition is less than 5% by weight, the effect of improving the rigidity cannot be obtained, while if it exceeds 95% by weight, the impact resistance will be significantly deteriorated, so that it cannot be put to practical use. do not have.
【００２１】また、プロピレン−スチレン系共重合体の
配合割合はプロピレン系重合体とスチレン系重合体の合
計１００重量部に対して１〜３０重量部であり、２〜２
０重量部のものが望ましく、とりわけ５〜１５重量部の
ものが好適である。該配合量が１重量部未満では、成形
品としたときの該成形品の耐衝撃性の向上効果が得られ
ず、また成形品表面に層剥離現象がみられ、外観性が悪
化する。また、３０重量部を超えると剛性を始め機械的
強度、加工性が低下するので好ましくない。The proportion of the propylene-styrene copolymer is 1 to 30 parts by weight, and 2 to 2 parts by weight, based on 100 parts by weight of the propylene polymer and styrene polymer.
0 parts by weight is preferred, and 5 to 15 parts by weight is particularly preferred. If the blending amount is less than 1 part by weight, the effect of improving the impact resistance of the molded product cannot be obtained, and a layer peeling phenomenon is observed on the surface of the molded product, resulting in poor appearance. Moreover, if it exceeds 30 parts by weight, the rigidity, mechanical strength, and workability decrease, which is not preferable.
【００２２】本発明の組成物は、各配合成分の所定量を
ヘンセルミキサー（商品名）、スーパーミキサーなどの
混合装置にいれて、数分間たとえば３分間撹拌混合し、
該混合物をロール、バンバリーミキサー、コニーダー、
単軸もしくは２軸の押出機などで溶融混練温度１８０〜
３００℃、より好ましくは２００〜２８０℃で溶融混練
しペレット化することにより製造することができる。本
発明の組成物には、必要に応じて通常ポリプロピレン系
樹脂に添加される各種の添加剤たとえば造核剤、酸化防
止剤、熱安定剤、帯電防止剤、紫外線吸収剤、重金属安
定化剤（銅害防止剤）、着色剤などを適宜併用すること
ができる。また、本発明の組成物には、本発明の目的を
著しく損なわない範囲で、他の付加的成分たとえばタル
ク、炭酸カルシウム、マイカなどの無機充填剤、難燃剤
、難燃助剤などを添加することができる。[0022] The composition of the present invention is prepared by putting a predetermined amount of each component into a mixing device such as a Hensel mixer (trade name) or a super mixer, and stirring and mixing for several minutes, for example, 3 minutes.
The mixture is rolled, Banbury mixer, co-kneader,
Melt-kneading temperature 180~ using a single-screw or twin-screw extruder, etc.
It can be produced by melt-kneading and pelletizing at 300°C, more preferably 200-280°C. The composition of the present invention may optionally contain various additives that are normally added to polypropylene resins, such as nucleating agents, antioxidants, heat stabilizers, antistatic agents, ultraviolet absorbers, and heavy metal stabilizers ( Copper damage inhibitors), colorants, etc. can be used in combination as appropriate. In addition, other additional components such as inorganic fillers such as talc, calcium carbonate, and mica, flame retardants, flame retardant aids, etc. may be added to the composition of the present invention within a range that does not significantly impair the purpose of the present invention. be able to.
【００２３】[0023]
【実施例】以下、実施例によって本発明をさらに詳しく
説明するが、各評価方法は以下のとおりである。絞り成
形温度範囲：厚み１ｍｍのシートを、中央に１５０ｍｍ
径の穴を有する２枚の板（２５０ｍｍ×２５０ｍｍ×３
ｍｍ）の間に挟み、断熱箱の中に水平にセットする。次
にシートを均一に加熱出来るように、３５０〜４５０℃
に加熱されたヒーターをシート上面１５ｃｍの高さにス
ライドさせる。加熱されたシートは、まずヒーター側に
膨張する。
その後、シートの厚み方向に均一に昇温が進むと、シー
トは再び水平となり、それ以後は、シートの自重により
垂れ下がりが進行する。ここで、シートがこの再び水平
になる状態を基準として、その前後にヒーターを取り除
き、先端Ｒ４０ｍｍでフエルトを巻いた押込プラグを、
押込速度２４０ｍｍ／秒、圧力１．０ｋｇ／ｃｍ２ で
最大押込量１５０ｍｍまで押込む。絞り比は１．０であ
る。冷却後、押込プラグを抜取り成形品に光を通してそ
の厚みムラを観察し、評価する。また、シートの上面に
サーモテープを貼り、その色の変化によってその時のシ
ートの温度を測定する。シートの温度はヒーターによる
加熱時間を変えることにより変化させる。以上の手法を
用い、各温度における成形品の肉厚ムラを観察し、厚み
ムラのない成形品が得られる成形可能な温度範囲を評価
する。シートの垂れ量：シートを上記の絞り成形温度範
囲の測定方法と同様にセットし、ヒーターで４分間加熱
し、その時のシートの垂れた量を測定。熱変形温度：Ｊ
ＩＳ−Ｋ７２０７に準拠（荷重４．６ｋｇ／ｃｍ２）し
て測定。衝撃強度：ＪＩＳ−Ｋ１１１１に準拠してシャ
ルピー衝撃強度（容量４０ｋｇ−ｃｍ）を測定。[Examples] The present invention will be explained in more detail with reference to Examples, and each evaluation method is as follows. Drawing temperature range: 1mm thick sheet, 150mm in the center
Two plates with holes of the same diameter (250mm x 250mm x 3
mm) and set horizontally in an insulated box. Next, heat the sheet to 350-450℃ so that it can be heated evenly.
Slide the heated heater to a height of 15 cm from the top of the seat. The heated sheet first expands toward the heater. Thereafter, as the temperature increases uniformly in the thickness direction of the sheet, the sheet becomes horizontal again, and from then on, the sheet begins to sag due to its own weight. Now, with the seat level again as a reference, remove the heaters before and after that, and insert a push-in plug wrapped in felt with a tip radius of 40 mm.
Push in at a pushing speed of 240 mm/sec and a pressure of 1.0 kg/cm2 to a maximum pushing amount of 150 mm. The aperture ratio is 1.0. After cooling, remove the push-in plug and shine a light through the molded product to observe and evaluate its thickness unevenness. Additionally, thermo tape is pasted on the top of the sheet, and the temperature of the sheet at that time is measured by the change in color. The temperature of the sheet is changed by changing the heating time by the heater. Using the above method, the thickness unevenness of the molded product at each temperature is observed, and the moldable temperature range in which a molded product with no thickness unevenness can be obtained is evaluated. Amount of sheet sag: Set the sheet in the same way as the method for measuring the drawing temperature range above, heat it with a heater for 4 minutes, and measure the amount of sheet sag at that time. Heat distortion temperature: J
Measured in accordance with IS-K7207 (load 4.6 kg/cm2). Impact strength: Charpy impact strength (capacity 40 kg-cm) was measured in accordance with JIS-K1111.
【００２４】実施例１〜４、比較例１〜３プロピレン系
重合体としてプロピレンホモポリマー（ＭＦＲ１．５ｇ
／１０分、比重０．９０５）、スチレン系重合体として
ポリスチレン（ＭＦＲ２．２ｇ／１０分、比重１．０５
）、プロピレン−スチレン共重合体としてＰＰ−ｇ−Ｐ
Ｓ（ＭＦＲ１４ｇ／１０分、スチレン含有量３０重量％
）及びＳＥＰ（ＭＦＲ０．９２ｇ／１０分、スチレン含
有量３５重量％）を用いて表１に示す配合割合でスーパ
ーミキサーでブレンドした後、２３０℃の押出機にて造
粒した。造粒した各サンプルを２１０℃でプレス成形し
、２０ｃｍ×２０ｃｍ×１ｍｍのサンプルを得た。これ
らのサンプルを評価し、その結果を表１に示す。実施例
のものは、比較例に比し物性を損なうことなく絞り成形
温度範囲を広くとれるので、優れた絞り性が得られ、耐
衝撃強度も向上していることがわかる。Examples 1 to 4, Comparative Examples 1 to 3 Propylene homopolymer (MFR 1.5g
/10 minutes, specific gravity 0.905), polystyrene as the styrene polymer (MFR2.2g/10 minutes, specific gravity 1.05)
), PP-g-P as propylene-styrene copolymer
S (MFR14g/10min, styrene content 30% by weight
) and SEP (MFR 0.92 g/10 min, styrene content 35% by weight) were blended in a super mixer at the blending ratio shown in Table 1, and then granulated in an extruder at 230°C. Each granulated sample was press-molded at 210°C to obtain a sample of 20 cm x 20 cm x 1 mm. These samples were evaluated and the results are shown in Table 1. It can be seen that in the examples, the drawing temperature range can be widened without impairing the physical properties compared to the comparative examples, so that excellent drawing properties are obtained and the impact strength is also improved.
【００２５】[0025]
【表１】[Table 1]
【００２６】[0026]
【発明の効果】本発明の熱可塑性樹脂組成物は、耐衝撃
性、耐熱性及び成形性に優れており、食品包装分野向け
のシート材料に用いられる。[Effects of the Invention] The thermoplastic resin composition of the present invention has excellent impact resistance, heat resistance, and moldability, and is used as a sheet material for the food packaging field.
Claims (1)
スチレン系重合体５〜９５重量％の合計１００重量部に
対してプロピレン−スチレン系共重合体１〜３０重量部
を使用してなる熱可塑性樹脂組成物。[Claim 1] Heat obtained by using 1 to 30 parts by weight of a propylene-styrene copolymer to a total of 100 parts by weight of 5 to 95% by weight of a propylene polymer and 5 to 95% by weight of a styrene polymer. Plastic resin composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7560391A JPH04288355A (en) | 1991-03-15 | 1991-03-15 | Composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7560391A JPH04288355A (en) | 1991-03-15 | 1991-03-15 | Composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04288355A true JPH04288355A (en) | 1992-10-13 |
Family
ID=13580951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7560391A Pending JPH04288355A (en) | 1991-03-15 | 1991-03-15 | Composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04288355A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000079665A (en) * | 1998-06-29 | 2000-03-21 | Daicel Chem Ind Ltd | Gas barrier synthetic resin sheet |
| WO2002062889A1 (en) * | 2001-02-07 | 2002-08-15 | Idemitsu Petrochemical Co., Ltd. | Polyolefin resin composition |
| JP2016011164A (en) * | 2014-06-02 | 2016-01-21 | 日本ポリプロ株式会社 | Deep-drawn container |
-
1991
- 1991-03-15 JP JP7560391A patent/JPH04288355A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000079665A (en) * | 1998-06-29 | 2000-03-21 | Daicel Chem Ind Ltd | Gas barrier synthetic resin sheet |
| WO2002062889A1 (en) * | 2001-02-07 | 2002-08-15 | Idemitsu Petrochemical Co., Ltd. | Polyolefin resin composition |
| US7193013B2 (en) | 2001-02-07 | 2007-03-20 | Idemitsu Kosan Co. Ltd. | Polyolefin resin composition |
| JP2016011164A (en) * | 2014-06-02 | 2016-01-21 | 日本ポリプロ株式会社 | Deep-drawn container |
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