JPH0616883A - Reinforced polypropylene resin composition - Google Patents

Reinforced polypropylene resin composition

Info

Publication number
JPH0616883A
JPH0616883A JP20025792A JP20025792A JPH0616883A JP H0616883 A JPH0616883 A JP H0616883A JP 20025792 A JP20025792 A JP 20025792A JP 20025792 A JP20025792 A JP 20025792A JP H0616883 A JPH0616883 A JP H0616883A
Authority
JP
Japan
Prior art keywords
glass fiber
polypropylene resin
resin
component
total amount
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.)
Granted
Application number
JP20025792A
Other languages
Japanese (ja)
Other versions
JP2897538B2 (en
Inventor
Junji Koizumi
順二 小泉
Haruyasu Mizutani
治靖 水谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP4200257A priority Critical patent/JP2897538B2/en
Priority to DE4322108A priority patent/DE4322108C2/en
Publication of JPH0616883A publication Critical patent/JPH0616883A/en
Priority to US08/284,734 priority patent/US5883159A/en
Application granted granted Critical
Publication of JP2897538B2 publication Critical patent/JP2897538B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To provide a reinforced polypropylene resin compsn. which gives a molded article with a reduced weld height and is excellent in impact strength and bending modulus. CONSTITUTION:The compsn. is prepd. by compounding a polypropylene resin (A), a glass fiber coated with a polypropylene resin (B), and a glass fiber (C) in such amts. that the sum of polypropylene resins in components A and B is 65-95wt.%, that the sum G of glass fibers in components B and C is 5-35wt.%, and that the melt flow rate M (g/10min) of component A and the sum G satisfy the relation: M<1000/G.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は,特に樹脂成形品におけ
るウェルド部の盛上りが少ない強化ポリプロピレン樹脂
組成物に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced polypropylene resin composition in which the weld portion of a resin molded product is less prominent.

【0002】[0002]

【従来技術】ガラス繊維強化ポリプロピレン樹脂組成物
(以下,強化PPGともいう)は,一般に機械的強度,
剛性,耐熱性に優れかつ低コストであることから自動車
部品,電気器具部品等の工業製品に広く用いられてい
る。このうち自動車部品については,バッテリートレ
イ,インストルメントパネルの芯材,タインミングベル
トカバー,ファンシュラウド等のエンジン周辺部品等が
代表例として挙げられ,最近ではフェンダ,ロッカーパ
ネル,ホイールカバー等への外装部品への適用も活発に
検討されている。しかし,これら外装部品に強化PPG
を用いた場合の最大の問題点はガラス繊維を含有してい
るため,樹脂成形品表面の外観品質が劣ることである。
BACKGROUND OF THE INVENTION Glass fiber reinforced polypropylene resin compositions (hereinafter also referred to as reinforced PPG) generally have mechanical strength,
It is widely used in industrial products such as automobile parts and electric appliance parts due to its excellent rigidity and heat resistance and low cost. Among them, for automobile parts, battery trays, instrument panel cores, tineming belt covers, engine peripheral parts such as fan shrouds are typical examples, and recently, exterior parts for fenders, rocker panels, wheel covers, etc. The application to parts is also being actively investigated. However, reinforced PPG for these exterior parts
The biggest problem with using is that the surface quality of the resin molded product is inferior because it contains glass fiber.

【0003】そこで,表面外観性を向上させるために,
硫酸バリウム,炭酸カルシウム,タルク等の無機物を添
加する方法(特公平1−32856号公報),ガラス繊
維の直径及びガラス繊維表面処理剤の最適化(特公平4
−12297号公報),繊維状ケイ酸カルシウムの添加
(特公昭63−67498号公報),エチレン−α−オ
レフィンゴムの添加(特公昭63−67499号公
報),ガラス繊維の直径,ガラス繊維集束剤,及び顔料
成分の最適化(特公昭64−6658号,同64−76
18号,同64−9340号公報)等が提案されてい
る。これら従来の方法は,いずれも樹脂成形品の表面へ
のガラス繊維の浮き防止,表面光沢向上,シルバースト
リーク(ガラス繊維による銀状の線)防止等によるもの
で,表面外観性向上にはそれなりの効果を有する。
Therefore, in order to improve the surface appearance,
Method of adding inorganic substances such as barium sulfate, calcium carbonate, talc (Japanese Patent Publication No. 1-23856), optimization of glass fiber diameter and glass fiber surface treating agent (Japanese Patent Publication No. 4)
-12297), addition of fibrous calcium silicate (JP-B-63-67498), addition of ethylene-α-olefin rubber (JP-B-63-67499), diameter of glass fiber, glass fiber sizing agent , And optimization of pigment components (Japanese Patent Publications No. 64-6658 and 64-76).
No. 18, No. 64-9340) and the like are proposed. All of these conventional methods are for preventing the glass fibers from floating on the surface of the resin molded product, improving the surface gloss, and preventing silver streaks (silver-like lines due to the glass fibers). Have an effect.

【0004】[0004]

【解決しようとする課題】しかしながら,従来の強化ポ
リプロピレン樹脂組成物を用いた場合においても,樹脂
成形品のウェルド部における盛上りについて,問題があ
る。即ち,上記樹脂成形品は一般的に射出成形により製
造されることが多い。その際図5(A)に示すごとく,
金型内のキャビティーに複数のゲート91を設けて,溶
融樹脂を流し込む場合がある。また,同図の(B),
(C)に示すごとく,樹脂成形品9の製品形状として,
開口部92やボス95を有する場合もある。このような
場合,キャビティー内の樹脂の流れが複数となり,樹脂
成形品9には最終的に樹脂流れが出会った部分にウェル
ド部93が発生する。ここで重要なことは,このウェル
ド部93が,図6に示すごとく,盛上がり8を形成する
ことである。
However, even when the conventional reinforced polypropylene resin composition is used, there is a problem with the rise in the weld portion of the resin molded product. That is, the resin molded product is generally manufactured by injection molding in many cases. At that time, as shown in FIG.
There is a case where a plurality of gates 91 are provided in a cavity in a mold and a molten resin is poured therein. In addition, (B) in the figure,
As shown in (C), as the product shape of the resin molded product 9,
It may have an opening 92 or a boss 95. In such a case, a plurality of resin flows in the cavity, and a welded portion 93 is finally generated in the resin molded product 9 at a portion where the resin flow meets. What is important here is that the weld portion 93 forms a ridge 8 as shown in FIG.

【0005】この盛上り8は,ガラス繊維を入れた強化
ポリプロピレン樹脂組成物を用いる場合に,特に高く形
成され,その高さ故に,樹脂成形品9の表面外観性を損
なう。上記盛上り高さLは従来の強化ポリプロピレン樹
脂組成物を用いた場合40〜100μmに達している。
一方,表面外観性の点からすると,盛上り高さは35μ
m以下に押さえることが必要である。また,好ましくは
30μm以下である。なお,図6の符号82は,ガラス
繊維を示す。
When the reinforced polypropylene resin composition containing glass fiber is used, the ridge 8 is formed particularly high, and the height thereof impairs the surface appearance of the resin molded product 9. The rise height L reaches 40 to 100 μm when the conventional reinforced polypropylene resin composition is used.
On the other hand, in terms of surface appearance, the height of the rise is 35μ.
It is necessary to keep it below m. Further, it is preferably 30 μm or less. Reference numeral 82 in FIG. 6 indicates glass fiber.

【0006】なお,上記盛上り高さを低くするために
は,PPGの材料製造工程において,混練度合を強くし
てガラス繊維長を極力短くする方法(一般的に平均長が
300μm以下)や,ガラス繊維の添加量を減量する方
法が知られている。しかし,これらの手法ではウェルド
の盛上がり高さの減少に伴い,衝撃強度,剛性,耐熱性
も同時に低下してしまうという問題点がある。本発明は
かかる従来の問題点に鑑み,樹脂成形品におけるウェル
ド部の盛上り高さが少なく,かつ優れた衝撃強度及び剛
性,耐熱性を発揮する強化ポリプロピレン樹脂組成物を
提供しようとするものである。
In order to reduce the rise height, a method of strengthening the kneading degree to shorten the glass fiber length as much as possible in the PPG material manufacturing process (generally, the average length is 300 μm or less), A method of reducing the amount of glass fiber added is known. However, with these methods, there is a problem that impact strength, rigidity, and heat resistance are reduced at the same time as the rise height of the weld is reduced. In view of such conventional problems, the present invention intends to provide a reinforced polypropylene resin composition having a small rise height of a weld portion in a resin molded product and exhibiting excellent impact strength, rigidity and heat resistance. is there.

【0007】[0007]

【課題の解決手段】本発明は,(A)ポリプロピレン樹
脂と,(B)予めポリプロピレン樹脂で被覆された長さ
1mm以上の樹脂被覆ガラス繊維と,(C)ガラス繊維
とからなり,上記(A)及び(B)成分中におけるポリ
プロピレン樹脂の合計量が65〜95%(重量比,以下
同じ)であり,また,上記(B)及び(C)成分中にお
けるガラス繊維の合計量Gが5〜35%であり,かつ上
記(A)成分のポリプロピレン樹脂のメルトフローレー
トM(g/10分)と上記ガラス繊維合計量G(重量
%)とはM<1000/Gの関係を満足することを特徴
とするガラス繊維強化ポリプロピレン樹脂組成物にあ
る。
The present invention comprises (A) a polypropylene resin, (B) a resin-coated glass fiber having a length of 1 mm or more and previously coated with a polypropylene resin, and (C) a glass fiber. ) And the total amount of polypropylene resin in the component (B) is 65 to 95% (weight ratio, the same hereinafter), and the total amount G of glass fibers in the components (B) and (C) is 5 to 5%. 35%, and the melt flow rate M (g / 10 minutes) of the polypropylene resin as the component (A) and the total amount G (wt%) of the glass fibers satisfy the relationship of M <1000 / G. A characteristic is a glass fiber reinforced polypropylene resin composition.

【0008】本発明において,ポリプロピレン樹脂とし
ては,結晶性ポリプロピレン樹脂,結晶性エチレン−プ
ロピレン共重合体,アクリル酸,マレイン酸,イタコン
酸,無水マレイン酸等の不飽和有機酸またはその誘導体
で変性された結晶性プロピレン重合体及びこれらの混合
物が挙げられる。この中でも,特に好ましいものは,結
晶性エチレン・プロピレンブロック共重合体と変性結晶
性プロピレン重合体の組合せである。結晶性エチレン・
プロピレンブロック共重合体には,衝撃性,剛性,強度
のバランス上からエチレン成分が3〜12wt%含有さ
れていることが好ましい。変性結晶性プロピレン重合体
は,無水マレイン酸が0.1〜2wt%付加されたもの
が特に好ましく,その添加量はPPG全量中に2〜20
wt%含有されることが好ましい。これにより,衝撃
性,剛性,強度等の機械物性が一層向上する。
In the present invention, the polypropylene resin is modified with an unsaturated organic acid such as crystalline polypropylene resin, crystalline ethylene-propylene copolymer, acrylic acid, maleic acid, itaconic acid, maleic anhydride or a derivative thereof. And crystalline propylene polymers and mixtures thereof. Among these, a combination of a crystalline ethylene / propylene block copolymer and a modified crystalline propylene polymer is particularly preferable. Crystalline ethylene
The propylene block copolymer preferably contains an ethylene component in an amount of 3 to 12 wt% from the viewpoint of the balance of impact resistance, rigidity and strength. It is particularly preferable that the modified crystalline propylene polymer is added with maleic anhydride in an amount of 0.1 to 2 wt%, and the addition amount is 2 to 20 in the total amount of PPG.
It is preferable that the content is wt%. As a result, mechanical properties such as impact resistance, rigidity and strength are further improved.

【0009】また,ポリプロピレン樹脂のメルトフロー
レートは1〜100(g/10分)であることが好まし
い。1(g/10分)未満では流動性が悪く,成形性に
問題があり,一方100(g/10分)を越えると衝撃
性が低下するおそれがある。
The melt flow rate of the polypropylene resin is preferably 1 to 100 (g / 10 minutes). If it is less than 1 (g / 10 minutes), the fluidity is poor and there is a problem in moldability, while if it exceeds 100 (g / 10 minutes), the impact resistance may be reduced.

【0010】次に上記樹脂被覆ガラス繊維は,ガラス繊
維が予めポリプロピレン樹脂でコーティングされたもの
で,いわばガラス繊維強化ポリプロピレン樹脂に相当す
る。このものは平均長さ1mm以上のガラス繊維を含有
している。この樹脂被覆ガラス繊維は,通常,円柱状の
ペレットに予め成形されている。この樹脂被覆ガラス繊
維は,通常,長尺状のガラス繊維束の内部及び外部をポ
リプロピレン樹脂により含浸被覆し,硬化した後1mm
以上の長さのペレットに切断したものである。そのた
め,ガラス繊維は,ペレットと同じ長さで1mm以上の
長さを有している。
Next, the resin-coated glass fiber is a glass fiber previously coated with a polypropylene resin, and is, so to speak, equivalent to a glass fiber reinforced polypropylene resin. This contains glass fibers having an average length of 1 mm or more. This resin-coated glass fiber is usually preliminarily molded into a cylindrical pellet. This resin-coated glass fiber is usually coated with polypropylene resin to impregnate the interior and exterior of a long glass fiber bundle with polypropylene resin, and after curing, 1 mm
It is cut into pellets of the above length. Therefore, the glass fiber has the same length as the pellet and a length of 1 mm or more.

【0011】また,樹脂被覆ガラス繊維は,長さ1mm
であるが,その上限は20mmが好ましい。20mmを
越えると,ウェルド部の盛上り高さが増大するおそれが
ある。1mm未満では,衝撃強度,曲げ弾性が低下する
おそれがある。また,樹脂被覆ガラス繊維におけるガラ
ス繊維の直径は10〜25μmとすることが好ましい。
The resin-coated glass fiber has a length of 1 mm.
However, the upper limit is preferably 20 mm. If it exceeds 20 mm, the height of the weld portion may increase. If it is less than 1 mm, impact strength and bending elasticity may be reduced. The diameter of the glass fiber in the resin-coated glass fiber is preferably 10 to 25 μm.

【0012】また,上記樹脂被覆ガラス繊維を構成する
ポリプロピレン樹脂としては,上記A成分のポリプロピ
レン樹脂と同様のものを用いることができる。また,両
ポリプロピレン樹脂は,その相溶性の点より,同系統の
組成,流動性を有するものを用いることが好ましい。
As the polypropylene resin constituting the resin-coated glass fiber, the same polypropylene resin as the component A can be used. Further, it is preferable that both polypropylene resins have the same composition and fluidity from the viewpoint of compatibility.

【0013】一方,C成分であるガラス繊維は,樹脂被
覆ガラス繊維と異なり,単独のチョップドストランド状
のガラス繊維である。また,このものは,アミノシラ
ン,エポキシシラン,ビニルシラン等で表面処理されて
いるものが好ましい。ガラス繊維としては,直径3〜2
0μmのものを用いることが好ましい。また,ガラス繊
維の長さは,1〜10mmとすることが好ましい。1m
m未満では樹脂成形品の衝撃強度及び曲げ弾性が小さ
く,一方10mmを越えると樹脂中への分散が悪くな
る。
On the other hand, unlike the resin-coated glass fiber, the C component glass fiber is a single chopped strand glass fiber. Further, this is preferably surface-treated with aminosilane, epoxysilane, vinylsilane or the like. As a glass fiber, the diameter is 3 to 2
It is preferable to use one having a thickness of 0 μm. The length of the glass fiber is preferably 1 to 10 mm. 1m
When it is less than m, the impact strength and flexural elasticity of the resin molded product are small, while when it exceeds 10 mm, the dispersion in the resin becomes poor.

【0014】また,B成分のガラス繊維の量は,特に規
定されないが,B成分中に20〜80重量%のものが適
用できる。なお,経済的な面からガラス繊維の含有量は
できるだけ高く,40重量%以上とすることが好まし
い。
The amount of the component B glass fiber is not particularly limited, but 20-80 wt% of the component B can be applied. From the economical point of view, the glass fiber content is as high as possible, preferably 40% by weight or more.

【0015】また,B及びC成分中のガラス繊維の合計
量Gは,5〜35%とする必要がある。5%未満ではガ
ラス繊維による補強効果が不十分であり,特に衝撃性が
低く実用的でない。一方,35%を越えるとポリプロピ
レン樹脂を最適化しても外観品質(特にウェルド盛上が
り)は改良されない。更に,外観品質の観点から,B成
分中のガラス繊維量は,C成分のガラス繊維量より少な
くすることが特に好ましい。更に,A成分のポリプロピ
レン樹脂のメルトフローレートM(g/10分)と上記
ガラス繊維合計量Gとの間には,M<1000/Gの関
係を有する必要がある(図1参照)。この関係を外れる
と,ウェルド部の盛上り高さが大きくなる。
The total amount G of glass fibers in the B and C components must be 5 to 35%. If it is less than 5%, the reinforcing effect by the glass fiber is insufficient, and the impact resistance is particularly low and it is not practical. On the other hand, if it exceeds 35%, the appearance quality (particularly weld rise) will not be improved even if the polypropylene resin is optimized. Further, from the viewpoint of appearance quality, it is particularly preferable that the amount of glass fiber in the B component is smaller than that of the C component. Further, it is necessary that the melt flow rate M (g / 10 minutes) of the polypropylene resin as the component A and the total amount G of the glass fibers have a relationship of M <1000 / G (see FIG. 1). If this relationship is broken, the height of the weld rise will increase.

【0016】本発明の組成物を製造するに当たっては各
種の方法が可能であり,ヘンシェルミキサー,リボンブ
レンダー等で上記成分を予備混合して,単軸押出機,二
軸押出機,ニーダー等の混練機に供給して溶融混練,造
粒する方法や,ガラス繊維のみを押出機のベント口から
途中供給することも可能である。また,本発明における
組成物には,必要に応じて,熱安定剤,光安定剤,紫外
線吸収剤,帯電防止剤,滑剤,難燃剤,着色剤等の各種
添加剤を含有させても良い。
Various methods are available for producing the composition of the present invention. The above components are premixed by a Henschel mixer, a ribbon blender or the like, and kneaded by a single screw extruder, a twin screw extruder, a kneader or the like. It is also possible to supply it to the machine for melt-kneading and granulation, or to supply only the glass fiber midway through the vent port of the extruder. Further, the composition of the present invention may contain various additives such as a heat stabilizer, a light stabilizer, an ultraviolet absorber, an antistatic agent, a lubricant, a flame retardant, and a colorant, if necessary.

【0017】また,物性,コスト等の微調整のため,エ
チレン−プロピレン共重合体ゴム,エチレン・プロピレ
ン−ジエン共重合体ゴム,エチレン−ブテン・1共重合
ゴム等のエチレン系ゴム,スチレン−ブタジエン・スチ
レン共重合体ゴム,スチレン−エチレン・ブチレン−ス
チレン共重合体等のスチレン系ゴム等のエラストマー,
タルク,炭酸カルシウム,マイカ,硫酸バリウム,ウィ
スカー,クレー等の各種フィラーの添加も可能である。
For fine adjustment of physical properties and costs, ethylene-propylene copolymer rubber, ethylene-propylene-diene copolymer rubber, ethylene-based rubber such as ethylene-butene-1 copolymer rubber, styrene-butadiene rubber, etc.・ Elastomers such as styrene copolymer rubber, styrene-rubber such as styrene-ethylene / butylene-styrene copolymer,
It is possible to add various fillers such as talc, calcium carbonate, mica, barium sulfate, whiskers and clay.

【0018】[0018]

【作用及び効果】本発明においては,上記A,B及びC
成分を用い,ポリプロピレン樹脂の合計量を65〜95
%,ガラス繊維の合計量Gを5〜35%とし,かつA成
分のポリプロピレン樹脂のメルトフローレートMとガラ
ス繊維合計量Gとの関係がM<1000/Gを満たす場
合に,ウェルド部の盛上がり高さが小さくなることを見
いだした点を最大の特徴とする。
In the present invention, the above A, B and C
The total amount of polypropylene resin is 65-95
%, The total amount G of glass fibers is 5 to 35%, and the relationship between the melt flow rate M of the polypropylene resin as the component A and the total amount G of glass fibers satisfies M <1000 / G The greatest feature is that the height was found to be small.

【0019】さらに,B成分を併用したことにより,同
一のガラス繊維量で,従来技術により得られる材料と本
発明により得られる材料の物性を比較した場合,ウェル
ド部の盛上がり高さが同等で(即ち外観品質同等で),
アイゾット衝撃強度,曲げ弾性率,熱変形温度が向上す
るという相乗効果が得られる。換言すれば,物性同等の
条件下ではガラス繊維の添加量を減らすことができ,外
観品質は向上する。
Further, by using the component B together, when the physical properties of the material obtained by the prior art and the material obtained by the present invention are compared with the same amount of glass fiber, the rise height of the weld portion is the same ( That is, the appearance quality is equivalent),
The synergistic effect of improving Izod impact strength, flexural modulus, and heat distortion temperature can be obtained. In other words, the amount of glass fiber added can be reduced under conditions that are equivalent to the physical properties, and the appearance quality can be improved.

【0020】即ち,本発明の配合成分A,B,Cを,押
出混練機等を用いて溶融混練した際,C成分は原料段階
での繊維長に拘らず,押出混練機等によりかなり破損し
て,平均繊維長が400〜500μmになる。これに対
して,B成分中のガラス繊維長は,長さ1mm以上であ
ると共に予め樹脂で被覆されているため,C成分のガラ
ス繊維よりも破損され難い。そのため,上記混練後も平
均繊維長が700〜800μmと長い。
That is, when the compounding ingredients A, B, and C of the present invention are melt-kneaded by using an extrusion kneader or the like, the component C is considerably damaged by the extrusion kneader or the like regardless of the fiber length at the raw material stage. Thus, the average fiber length becomes 400 to 500 μm. On the other hand, the length of the glass fiber in the B component is 1 mm or more and is preliminarily coated with resin, so that it is less likely to be damaged than the glass fiber of the C component. Therefore, the average fiber length is as long as 700 to 800 μm even after the above kneading.

【0021】そのため,得られた樹脂成形品中において
は,結果的に短いガラス繊維と長いガラス繊維の混合状
態となって,短いガラス繊維が外観品質を,長いガラス
繊維が機械物性を担っていると予想される。なお,A成
分とC成分を溶融混練した場合の平均ガラス繊維長は,
約600μmであり,B成分の併用によりC成分の破損
がやや促進される。したがって,本発明よれば,樹脂成
形品においてウェルド部の盛上り高さが低く,かつ優れ
た衝撃強度及び剛性,耐熱性を発揮する強化ポリプロピ
レン樹脂組成物を提供することができる。
Therefore, in the obtained resin molded product, as a result, a short glass fiber and a long glass fiber are mixed, and the short glass fiber plays a role of appearance quality, and the long glass fiber plays a mechanical property. It is expected to be. The average glass fiber length when the components A and C are melt-kneaded is
It is about 600 μm, and the damage of the C component is slightly promoted by the combined use of the B component. Therefore, according to the present invention, it is possible to provide a reinforced polypropylene resin composition having a low rise height of a weld portion in a resin molded product and exhibiting excellent impact strength, rigidity and heat resistance.

【0022】[0022]

【実施例】前記A〜C成分を種々の割合(重量比)で混
合し,30mm2軸押出機を用いて溶融混練,造粒し,
次いでこれを用いて樹脂成形品を射出成形した(実施例
1〜13)。そして,該樹脂成形品における,曲げ弾性
率(kg/cm2 ),熱変形温度(℃),23℃のアイ
ゾット衝撃強度(kg・cm/cm),ウェルド部の盛
上り高さ(μm)を測定した。上記各成分の割合,及び
測定結果を表1〜表3に示した。また,同表には,比較
のため,成分割合等が本発明外の比較例C1〜C10に
ついても併示した。同表に示した各成分は,次のものを
用いた。本発明のA成分のポリプロピレン樹脂として
は,ポリプロピレンと変性ポリプロピレン重合体とを用
いた。
EXAMPLE The components A to C were mixed at various ratios (weight ratio), melt-kneaded and granulated using a 30 mm twin-screw extruder,
Then, a resin molded product was injection molded using this (Examples 1 to 13). The flexural modulus (kg / cm 2 ), heat distortion temperature (° C.), Izod impact strength (23 ° C.) (kg · cm / cm), and rise height (μm) of the welded portion of the resin molded product were measured. It was measured. Tables 1 to 3 show the proportions of the above components and the measurement results. Further, in the same table, for comparison, Comparative Examples C1 to C10 whose component ratios and the like are outside the present invention are also shown. The following components were used as the components shown in the table. As the polypropylene resin of the component A of the present invention, polypropylene and a modified polypropylene polymer were used.

【0023】前者のポリプロピレンとしては,エチレン
を7重量%含有する結晶性エチレン・プロピレン・ブロ
ック共重合体を用いた。また,これらは,メルトフロー
レートが15,30,45又は80(g/10分)のも
のを用いた。また,上記変性ポリプロピレン重合体とし
ては,無水マレイン酸変性の結晶性ポリプロピレン(ホ
モ)を用いた。
As the former polypropylene, a crystalline ethylene / propylene / block copolymer containing 7% by weight of ethylene was used. Further, those having a melt flow rate of 15, 30, 45 or 80 (g / 10 minutes) were used. As the modified polypropylene polymer, maleic anhydride modified crystalline polypropylene (homo) was used.

【0024】次に,樹脂被覆ガラス繊維は,ガラス繊維
として直径15〜20μm,長さ6〜7ミリを用い,該
ガラス繊維の束をポリプロピレン樹脂で含浸被覆したも
のを用いた。このポリプロピレン樹脂は,上記A成分に
示したメルトフローレート45(g/10分)の結晶性
エチレン・プロピレン・ブロック共重合体を用いた。ま
た,この樹脂被覆ガラス繊維は,円柱状のペレットで,
長さ6〜7mm(ガラス繊維長さと同じ),ペレット直
径2×3mm(楕円形)であった。更に,樹脂被覆ガラ
ス繊維中におけるガラス繊維は,50重量%である。
Next, as the resin-coated glass fiber, a glass fiber having a diameter of 15 to 20 μm and a length of 6 to 7 mm was used, and a bundle of the glass fiber was impregnated and coated with polypropylene resin. As the polypropylene resin, a crystalline ethylene / propylene / block copolymer having the melt flow rate of 45 (g / 10 minutes) shown in the above component A was used. Also, this resin-coated glass fiber is a cylindrical pellet,
The length was 6 to 7 mm (same as the glass fiber length), and the pellet diameter was 2 × 3 mm (elliptical shape). Further, the glass fiber in the resin-coated glass fiber is 50% by weight.

【0025】なお,実施例10においては,ガラス繊維
長さ(ペレット長さ)が3〜3.5mmのものを用い
た。また,比較例C10においては,ガラス繊維のチョ
ップドストランドとして,直径13μm,長さ3mmの
もの15%と,直径13μm,長さ6mmのもの5%と
を用いた。次に,C成分のガラス繊維は,直径約13μ
m,長さ3mmのチョップドストランドを用いた。
In Example 10, glass fiber having a glass fiber length (pellet length) of 3 to 3.5 mm was used. In Comparative Example C10, as chopped strands of glass fiber, 15% having a diameter of 13 μm and a length of 3 mm and 5% having a diameter of 13 μm and a length of 6 mm were used. Next, the glass fiber of C component has a diameter of about 13μ.
A chopped strand having a length of m and a length of 3 mm was used.

【0026】また,表1〜表3において,樹脂被覆ガラ
ス繊維の欄は,それを構成するガラス繊維とポリプロピ
レン樹脂との合計量で示されており,ガラス繊維は上記
のごとくその中50%を占めている。そのため,同表中
のガラス繊維合計量Gの欄には,上記樹脂被覆ガラス繊
維中の50%のガラス繊維量と,C成分のガラス繊維量
の合計量が示されている。
In Tables 1 to 3, the column of resin-coated glass fiber shows the total amount of the glass fiber and polypropylene resin constituting the glass fiber, and the glass fiber accounts for 50% of the total amount as described above. is occupying. Therefore, in the column of the total amount G of glass fibers in the same table, the total amount of the glass fibers of 50% in the resin-coated glass fibers and the amount of the C component glass fibers is shown.

【0027】次に,同表に示す曲げ弾性率はASTM−
D790,熱変形温度はASTM−D648(18.6
kg/cm2 荷重),アイゾット衝撃強度はASTM−
D256(ノッチ付き)により測定した。また,ウェル
ド部の盛上り高さは,図3に示すごとく,ダブルゲート
71,72により箱形樹脂成形品を成形し,図4に示す
ごとくそのウェルド部93における盛上り高さLを測定
した。この測定に当たっては,表面粗さ計〔サーフトン
550AD,東京精密(株)〕を用いた。
Next, the flexural modulus shown in the table is ASTM-
D790, heat distortion temperature is ASTM-D648 (18.6).
kg / cm 2 load), Izod impact strength is ASTM-
It was measured by D256 (notched). As for the ridge height of the weld portion, a box-shaped resin molded product was molded by the double gates 71 and 72 as shown in FIG. 3, and the ridge height L at the weld portion 93 was measured as shown in FIG. . A surface roughness meter [Surfton 550AD, Tokyo Seimitsu Co., Ltd.] was used for this measurement.

【0028】次に,上記測定結果につき説明する。ま
ず,図1に,上記実施例1〜9及び比較例C1〜C6に
ついて,ガラス繊維合計量Gとポリプロピレン樹脂(P
・P)のメルトフローレートM(g/10分)との関係
をプロットした。そして,各例における,ウェルド部の
盛上り高さ(μm)を,実施例については丸により囲ん
だ数値で,比較例については四角により囲んだ数値で示
した。
Next, the measurement results will be described. First, in FIG. 1, for the above Examples 1 to 9 and Comparative Examples C1 to C6, the total amount G of glass fibers and the polypropylene resin (P
The relationship between P) and the melt flow rate M (g / 10 minutes) was plotted. The rise height (μm) of the weld portion in each example is shown by a numerical value surrounded by a circle in the example and a numerical value surrounded by a square in the comparative example.

【0029】同図より知られるごとく,本発明にかかる
実施例1〜9は盛上り高さが33μm未満であり,一方
比較例C1〜C3,C5,C6は盛上り高さが37以上
である。そして,この両者の境界部分には,同図に示す
ごとく,M=1000/Gの関係線を引くことができ
る。また,比較例C4は,ガラス繊維合計量Gが40%
であり,盛上り高さが39μmである。上記より,M<
1000/G,ガラス繊維合計量35%以下の場合に
は,盛り上がり高さが35μm以下となることが分か
る。
As can be seen from the figure, Examples 1 to 9 according to the present invention have a rise height of less than 33 μm, while Comparative Examples C1 to C3, C5 and C6 have a rise height of 37 or more. . At the boundary between the two, a relation line of M = 1000 / G can be drawn as shown in FIG. Further, in Comparative Example C4, the total amount G of glass fibers is 40%.
And the rise height is 39 μm. From the above, M <
It can be seen that when the glass fiber amount is 1000 / G and the total amount of glass fibers is 35% or less, the rising height is 35 μm or less.

【0030】次に,図2には,実施例2,6,9,及び
比較例C7,C8,C9について,アイゾット衝撃強度
と上記盛上り高さとをプロットした。同図及び表1〜表
3より知られるごとく,本発明によれば,同じ盛上り高
さであっても,衝撃強度が向上していることが分かる。
例えば,本発明の実施例2は,比較例C7とほぼ同じ盛
上り高さであるが,実施例2の衝撃強度は高い値を示
し,比較例C7は衝撃強度がかなり低く実用上支障があ
る。即ち,本発明によれば,盛上がり高さを低く抑え,
かつ衝撃強度を高くすることができる。
Next, in FIG. 2, the Izod impact strength and the rise height are plotted for Examples 2, 6, 9 and Comparative Examples C7, C8, C9. As is known from the figure and Tables 1 to 3, according to the present invention, it is understood that the impact strength is improved even at the same rising height.
For example, Example 2 of the present invention has almost the same rise height as Comparative Example C7, but the impact strength of Example 2 shows a high value, and Comparative Example C7 has a considerably low impact strength and is problematic in practical use. . That is, according to the present invention, the rising height is suppressed to a low level,
Moreover, the impact strength can be increased.

【0031】[0031]

【表1】 [Table 1]

【0032】[0032]

【表2】 [Table 2]

【0033】[0033]

【表3】 [Table 3]

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例における,ガラス繊維合計量とポリプロ
ピレン樹脂のメルトフローレートとの関係における,ウ
ェルド部の盛上り高さを示す説明図。
FIG. 1 is an explanatory diagram showing a rising height of a weld portion in a relationship between a total amount of glass fibers and a melt flow rate of polypropylene resin in an example.

【図2】実施例における,アイゾット衝撃強度とウェル
ド部の盛上り高さとの関係を示す説明図。
FIG. 2 is an explanatory diagram showing the relationship between Izod impact strength and the rising height of the weld portion in the example.

【図3】実施例におけるウェルド部の説明図。FIG. 3 is an explanatory view of a weld portion in the embodiment.

【図4】図3のY−Y線矢視に沿った,ウェルド部の盛
上り高さの説明図。
FIG. 4 is an explanatory view of a height of a weld portion rising along a line YY of FIG.

【図5】従来例で示した,各種樹脂成形品におけるウェ
ルド部の説明図。
FIG. 5 is an explanatory view of a weld portion in various resin molded products shown in a conventional example.

【図6】従来例で示した,ウェルド部の盛上りの説明
図。
FIG. 6 is an explanatory view of the rise of the weld portion shown in the conventional example.

【符号の説明】[Explanation of symbols]

7,9...樹脂成形品, 93...ウェルド部, 8...盛上り, 82...ガラス繊維, 7, 9. . . Resin molded product, 93. . . Weld section, 8. . . Excitement, 82. . . Glass fiber,

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 (A)ポリプロピレン樹脂と,(B)予
めポリプロピレン樹脂で被覆された長さ1mm以上の樹
脂被覆ガラス繊維と,(C)ガラス繊維とからなり,上
記(A)及び(B)成分中におけるポリプロピレン樹脂
の合計量が65〜95%(重量比,以下同じ)であり,
また,上記(B)及び(C)成分中におけるガラス繊維
の合計量Gが5〜35%であり,かつ上記(A)成分の
ポリプロピレン樹脂のメルトフローレートM(g/10
分)と上記ガラス繊維合計量G(重量%)とはM<10
00/Gの関係を満足することを特徴とするガラス繊維
強化ポリプロピレン樹脂組成物。
1. A method comprising: (A) a polypropylene resin; (B) a resin-coated glass fiber having a length of 1 mm or more previously coated with a polypropylene resin; and (C) a glass fiber. The total amount of polypropylene resin in the components is 65 to 95% (weight ratio, the same hereinafter),
Further, the total amount G of glass fibers in the components (B) and (C) is 5 to 35%, and the melt flow rate M (g / 10 of the polypropylene resin of the component (A) is
Minute) and the total amount G (% by weight) of the glass fibers are M <10.
A glass fiber reinforced polypropylene resin composition characterized by satisfying the relationship of 00 / G.
JP4200257A 1992-07-03 1992-07-03 Reinforced polypropylene resin composition Expired - Fee Related JP2897538B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4200257A JP2897538B2 (en) 1992-07-03 1992-07-03 Reinforced polypropylene resin composition
DE4322108A DE4322108C2 (en) 1992-07-03 1993-07-02 Reinforced polypropylene resin mixture and hub cap made from it
US08/284,734 US5883159A (en) 1992-07-03 1994-08-01 Reinforced polypropylene resin composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4200257A JP2897538B2 (en) 1992-07-03 1992-07-03 Reinforced polypropylene resin composition

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP33591998A Division JP3336278B2 (en) 1992-07-03 1998-11-26 Resin molded products for automotive exterior

Publications (2)

Publication Number Publication Date
JPH0616883A true JPH0616883A (en) 1994-01-25
JP2897538B2 JP2897538B2 (en) 1999-05-31

Family

ID=16421363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4200257A Expired - Fee Related JP2897538B2 (en) 1992-07-03 1992-07-03 Reinforced polypropylene resin composition

Country Status (1)

Country Link
JP (1) JP2897538B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007161791A (en) * 2005-12-12 2007-06-28 Daicel Polymer Ltd Resin composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007161791A (en) * 2005-12-12 2007-06-28 Daicel Polymer Ltd Resin composition

Also Published As

Publication number Publication date
JP2897538B2 (en) 1999-05-31

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