JPS61127338A - Plastic molded member - Google Patents
Plastic molded memberInfo
- Publication number
- JPS61127338A JPS61127338A JP24997784A JP24997784A JPS61127338A JP S61127338 A JPS61127338 A JP S61127338A JP 24997784 A JP24997784 A JP 24997784A JP 24997784 A JP24997784 A JP 24997784A JP S61127338 A JPS61127338 A JP S61127338A
- Authority
- JP
- Japan
- Prior art keywords
- molded body
- molded member
- thermoplastic elastomer
- molded
- plastic molded
- 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
- 229920003023 plastic Polymers 0.000 title claims abstract description 21
- 239000004033 plastic Substances 0.000 title claims abstract description 21
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 22
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 20
- 238000000465 moulding Methods 0.000 claims abstract description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 239000011342 resin composition Substances 0.000 claims description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims 1
- 229920006026 co-polymeric resin Polymers 0.000 claims 1
- 238000009832 plasma treatment Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 13
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 13
- 238000001746 injection moulding Methods 0.000 abstract description 10
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 abstract description 9
- 238000002156 mixing Methods 0.000 abstract description 8
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 abstract 2
- 239000000805 composite resin Substances 0.000 abstract 1
- 230000036425 denaturation Effects 0.000 abstract 1
- 238000004925 denaturation Methods 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 125000003011 styrenyl group Chemical class [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000004416 thermosoftening plastic Substances 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920006465 Styrenic thermoplastic elastomer Polymers 0.000 description 1
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical class C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- GKOZKEKDBJADSV-UHFFFAOYSA-N disilanol Chemical compound O[SiH2][SiH3] GKOZKEKDBJADSV-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- -1 softeners Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920006132 styrene block copolymer Polymers 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1676—Making multilayered or multicoloured articles using a soft material and a rigid material, e.g. making articles with a sealing part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
- B29C45/14491—Injecting material between coaxial articles, e.g. between a core and an outside sleeve for making a roll
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
(発明の技術分野)
本発明は、耐熱性に浸れ防振材として有用なプラスチッ
ク成形体に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a plastic molded article that is heat resistant and useful as a vibration damping material.
(発明の技術的背景)
従来から、振動の発生を防止し或いは外部からO振動、
衝Sを緩和する目的で種々の形状の防振材が用いら几て
き次が、近年は、硬質の熱可塑性ポリマーと軟質の熱可
塑性エラストマーとの2株類のプラスチックを、二頭射
出成形礪等を用いて同時成形してなる全グラスチックの
成形体が防振材として開発されている。(Technical Background of the Invention) Conventionally, there has been a method to prevent the generation of vibrations or to remove O vibrations from the outside.
Various shapes of vibration isolating materials have been used for the purpose of alleviating shock waves, but in recent years, two types of plastics, hard thermoplastic polymers and soft thermoplastic elastomers, have been used for two-head injection molding. An all-glass molded body formed by simultaneous molding using such materials has been developed as a vibration isolating material.
(特開昭56−66537号公報)
而してこのようなプラスチック成形体において軟質の熱
可塑性エラストマーとしては、硬質の熱可塑性ポリマー
(主にポリスチレンを用いる。)との熱触着性および柔
軟性に優れている友め、スチレン−ブタジェン共重合体
のようなスチレン系の熱可塑性エラストマーが用いられ
ている。(Japanese Unexamined Patent Publication No. 56-66537) In such a plastic molded article, the soft thermoplastic elastomer has good thermal adhesion with the hard thermoplastic polymer (mainly polystyrene is used) and flexibility. Styrene-based thermoplastic elastomers such as styrene-butadiene copolymers are used because they have excellent properties.
(背景技術の問題点)
しかしながら、スチレン系熱可塑性エラストマーは、一
般に耐熱性および耐候性が悪くクリープが大きいという
欠点を有する友め、これを用い念前記プラスチック成形
体は耐熱耐候性が充分でないという問題があり九〇
特にこの成形体を、防振材として豊中宇安常に荷重の負
荷される用途に使用し几場合には、温度の上昇に伴なっ
てクリープ量が著るしぐ増大してしまうという問題が6
つ几。(Problems in the Background Art) However, styrene-based thermoplastic elastomers generally have the disadvantage of poor heat resistance and weather resistance, and large amounts of creep. There is a problem, especially when this molded body is used as a vibration isolator in applications where loads are constantly applied to Toyonaka Uyasu, the amount of creep increases significantly as the temperature rises. There are 6 problems with putting away
One time.
(発明の目的)
本発明は、このような問題を解決する定めになされtも
ので、耐熱性、特に高温での耐クリープ特性に優れ防振
材として好適するプラスチック成形体を提供することを
目的とする。(Object of the Invention) The present invention was made to solve these problems, and an object of the present invention is to provide a plastic molded article that has excellent heat resistance, particularly creep resistance at high temperatures, and is suitable as a vibration damping material. shall be.
(発明の概要)
すなわち本発明のプラスチック成形体は、硬質の熱可塑
性ポリマーからなる同心状で実質的に離隔されt第1お
よび第2成形体部分と、該第1成形体部分と81!2成
形体部分との間に延長されこれらに固着され几熱可塑性
エラストマーからなる第3成形体部分とから成るプラス
チック成形体において、第3成形体部分が、去スチレン
系の熱可塑性工、ユトーー込〜常温、架橋可能、に、/
リヤ変性のエチレン−酢酸ビニル共重合体樹脂とヲ、4
0:60から95:5の範囲の重量比で混合し次樹脂組
成物を架橋させtものであることを4?微としている。(Summary of the Invention) That is, the plastic molded body of the present invention includes first and second molded body portions made of a hard thermoplastic polymer that are concentric and substantially spaced apart from each other, and the first molded body portion and the first molded body portion 81!2. and a third molded body part made of a thermoplastic elastomer extended between and fixed to the molded body parts, the third molded body part being made of a styrene-free thermoplastic material, and a third molded body part made of a thermoplastic elastomer. Normal temperature, crosslinkable, /
Rear-modified ethylene-vinyl acetate copolymer resin and 4
The resin composition is then crosslinked by mixing at a weight ratio ranging from 0:60 to 95:5. It's slight.
本発明のプラスチック成形体の一例を第1図に示す。図
において、符号1および2は、それぞれ同心状で実質的
に相互に離隔さn7を硬質の熱可塑性ポリマーからなる
内側および外側の成形体部分を示し、符号3はこれらの
間に固着されt熱可塑性エラストマーからなる中間成形
体部分を示す。An example of the plastic molded article of the present invention is shown in FIG. In the figure, numerals 1 and 2 respectively designate inner and outer molded body parts of a hard thermoplastic polymer concentrically and substantially spaced apart from each other, and numeral 3 denotes an inner and an outer molded body part made of a hard thermoplastic polymer, and numeral 3 is a thermoplastic polymer fixed therebetween. The intermediate molded body portion made of a plastic elastomer is shown.
ここで内側および外側の成形体部分1.2t−構成する
硬質の熱可塑性ポリマーとしては、ポリスチレン、ポリ
フェニレンオキサイド(ppo)、アクリロニトリル−
ブタジェンスチレン共重合体(ABS)、ポリメチルメ
タクリレートなど1−2用することができる。まt1内
側の成形体部分1と外側の成形体部分2とは同じ材料で
構成することが望ましい。中間の成形体部分3は、(A
)スチレン系の熱可塑性エラストマー漱B)常温で架橋
可能なシリル変性のEVA樹脂とを混合してなる軟質の
熱可塑性エラストマーで構成されているが、(A)のス
チレン系の熱可塑性エラストマーとしては、スチレン−
ブタジェン−スチレンブロック共重合体(SBS)やス
チレン−エチルブチレン−スチレンブロック共重合体(
SEBS)をf重用することができ、ま友CB)の常温
で架橋可能なシリル変性(DEVA樹脂としテハ、E
VAIC,0,5〜10重量部のビニルトリメトキシシ
ラン(VTMO8)のようなトリアルコキシシランと、
0.01〜2. OICC郡部ジクミルパーオキサイド
(DCP)のようなラジカル発生剤とを加熱混練しtも
のを用いることができる。Here, the hard thermoplastic polymers constituting the inner and outer molded body parts (1.2 tons) include polystyrene, polyphenylene oxide (ppo), acrylonitrile.
Butadiene styrene copolymer (ABS), polymethyl methacrylate, etc. 1-2 can be used. It is desirable that the inner molded body portion 1 and the outer molded body portion 2 be made of the same material. The intermediate molded body portion 3 is (A
) Styrene-based thermoplastic elastomer B) Composed of a soft thermoplastic elastomer mixed with silyl-modified EVA resin that can be crosslinked at room temperature, but as the styrene-based thermoplastic elastomer (A), , styrene-
Butadiene-styrene block copolymer (SBS) and styrene-ethylbutylene-styrene block copolymer (
SEBS) can be used heavily, and Matomo CB) can be cross-linked at room temperature with silyl-modified resin (DEVA resin and Teha, E
VAIC, 0.5 to 10 parts by weight of a trialkoxysilane such as vinyltrimethoxysilane (VTMO8);
0.01~2. A product obtained by heating and kneading OICC with a radical generator such as dicumyl peroxide (DCP) can be used.
本発明においては、このようなペレット状の(A)スチ
レン系熱可塑性エラストマート、(B)シリル変性EV
A樹脂と、この(B)シリル変性EVA樹脂を架橋させ
るに必要なシラノール縮合触媒であるジ40 :60か
ら95:5の重量比になるように均一に混合することに
より中間の成形体部分3t−構成する軟質の熱可塑性ニ
ジストマーが得られる。In the present invention, such pellet-like (A) styrenic thermoplastic elastomer, (B) silyl-modified EV
By uniformly mixing resin A and disilanol condensation catalyst necessary for crosslinking this (B) silyl-modified EVA resin at a weight ratio of 40:60 to 95:5, the intermediate molded body portion 3t is obtained. - Consisting soft thermoplastic nidistomers are obtained.
(A)と(B)O両成分の配合比を前記範囲に限定しt
のHl(A)スチレン系熱可塑性ニジストマーの配合量
が40重量%未満で(B)シリル変性EVA樹脂の配合
量が60重11Nを越えると柔款性が充分でなA樹脂の
配合量が5重tX未満の場合には、(B)成分添加によ
る中間成形体部分3の耐熱クリープ性向上の効果が現わ
れないためである。最も望ましいこれら両成分の配合比
(重量比)i、A:Bが60:40から80 :20の
範囲である。The blending ratio of both components (A) and (B) O is limited to the above range.
If the blending amount of Hl (A) styrenic thermoplastic nidistomer is less than 40% by weight and the blending amount of (B) silyl-modified EVA resin exceeds 60 weight 11N, flexibility is insufficient.The blending amount of A resin is 5%. This is because if the weight is less than tX, the effect of improving the heat resistant creep property of the intermediate molded body portion 3 by adding the component (B) will not appear. The most desirable blending ratio (weight ratio) of these two components, i, A:B, is in the range of 60:40 to 80:20.
さらにこのような軟質の熱可塑性エラストマー中および
前記内側、外側の成形体部分1.2t−構成する硬質の
熱可塑性ポリマー中VCは、必要に応じて補強剤、充填
剤、軟化剤、着色剤、安定剤等の特性改良剤を適量添加
してもさしつかえない。Furthermore, the VC in such a soft thermoplastic elastomer and in the hard thermoplastic polymer constituting the inner and outer molded body parts 1.2t may contain reinforcing agents, fillers, softeners, colorants, It is also possible to add an appropriate amount of property improvers such as stabilizers.
本発明においてこのように構成されるプラスチツク成形
体ヲ裂造するには、例えば以下に示すような二頭射出成
形機を用いた同時底形の方法を採るのが望ましい。In order to manufacture the plastic molded article constructed as described above in the present invention, it is desirable to employ a simultaneous bottom molding method using a two-head injection molding machine as shown below, for example.
すなわち82図に示すように、それぞれ所定形状を有し
同心状で相互IC離隔されt篇lの型キャビティ4と篇
2の型キヤビテイ5内に、射出成形機を用いて■熱溶融
させ友前記硬質の熱可塑性ポリマー6t−射出充填しt
後、このポリマー6が未だ熱くかつ固化し定状態のとき
にコアγ全第3図に示す位置まで後退させて第3の型キ
ャビティ8を開放し、ここに射出成形機により加熱溶融
させt前記シラノール縮合触媒入りの熱可塑性エラスト
マー9t−射出充填する。That is, as shown in Fig. 82, mold cavities 4 and 2, each having a predetermined shape and concentrically spaced apart from each other, are heated and melted using an injection molding machine. Rigid thermoplastic polymer 6t - injection filled t
After that, when the polymer 6 is still hot and solidified, the core γ is moved back to the position shown in FIG. 3 to open the third mold cavity 8, where it is heated and melted by an injection molding machine. Thermoplastic elastomer 9t containing silanol condensation catalyst - injection filling.
次いで、全体を室温まで冷却してから型を開放して成形
体全敗り出しt後、室温に放置し或いは加熱してシラノ
ール縮合触媒入りの熱可塑性エラストマー(シリル変性
のEVA樹脂成分)t−架橋させる。Next, the whole is cooled to room temperature, the mold is opened, and the molded body is completely collapsed, and then the thermoplastic elastomer containing the silanol condensation catalyst (silyl-modified EVA resin component) is crosslinked by leaving it at room temperature or heating it. let
こうして硬質の熱可塑性ポリマーからなる纂lおよび@
2の成形体部分と、これらの間1cはりきり定まった境
界面をもって接着され之架橋熱可塑性エラストマーから
なる@3の成形体部分とで構成さfLfcプラスチック
成形体が得られる。In this way, a fabric made of a hard thermoplastic polymer and @
An fLfc plastic molded body is obtained, which is composed of a molded body part 2 and a molded body part @3 made of a crosslinked thermoplastic elastomer, which is bonded between them with a well-defined boundary surface.
ま定本発明においては、第1および第2の成形体部分と
i3の成形体部分との接着性を増す之めに、第1および
再2の成形体部分の第3成形体部分と接する接着面を予
め低温プ2ズゼ処理しておくことが望ましい。In the present invention, in order to increase the adhesion between the first and second molded body parts and the i3 molded body part, the adhesive surfaces of the first and second molded body parts that are in contact with the third molded body part are It is desirable to pre-process the material at low temperature.
すなわち、まず硬質の熱可塑性ポリマーを射出成形成い
に圧縮成形することにより第1および第2の成形体部分
を製造し、これらを真空容器内で陽極に対向して配置さ
f′L7を陽極上に設置し、電極間に高周波電力を付加
して低温プラズマ処理を行なう。こうして予熱しt後、
第1および第2成形体部分を金型の所定の部位に装着し
、次いでこ几らの間の型キヤビテイ内に熱可塑性エラス
トマーを射出充填し、架橋させて第3の成形体部分t−
底成形ることによp、篇1と第2の成形体部分の間に第
3の成形体部分が強固に接着さf′L7?ニゲラスチッ
ク成形体が得られる。That is, first and second molded body parts are manufactured by injection molding or compression molding a hard thermoplastic polymer, and these are placed facing the anode in a vacuum container, with f'L7 being the anode. high-frequency power is applied between the electrodes to perform low-temperature plasma processing. After preheating in this way,
The first and second molded body parts are attached to predetermined parts of the mold, and then a thermoplastic elastomer is injected and filled into the mold cavity between them, and crosslinked to form a third molded body part t-
By forming the bottom, the third molded body part is firmly bonded between the part 1 and the second molded body part f'L7? A nigerastic molded body is obtained.
(発明の実施例) 以下本発明の実施例について記載する。(Example of the invention) Examples of the present invention will be described below.
実施例
前述の同時射出成形の方法で、内側および外側の成形体
部分1.2がポリスチレンから成り、これらの間の中間
の成形体部分3が次表の組成の軟質の熱可塑性ニジスト
マーから構成される第1図に示す形状のプラスチック成
形体を製造し友。EXAMPLE In the method of simultaneous injection molding described above, the inner and outer molded body parts 1.2 were made of polystyrene, and the molded body part 3 intermediate between them was composed of a soft thermoplastic nystomer having the composition shown in the table below. A friend who manufactures a plastic molded body with the shape shown in Figure 1.
尚、吸質Q熱可塑性エラストマーを構成する配合成分の
うちシリル変性の1.i’A樹脂fl、EVA100i
量g[VTMO82,0重量部とDCPo、02重量部
を配合し加熱混練しtものであり、これをSBSと共に
射出成形機に投入しさらにDBTDL。Of the ingredients constituting the absorptive Q thermoplastic elastomer, silyl-modified 1. i'A resin fl, EVA100i
Amount g [82.0 parts by weight of VTMO and 2 parts by weight of DCPo were mixed together and heated and kneaded, which was then put into an injection molding machine together with SBS and further processed into DBTDL.
のマスターバッチを加えて加熱混練し友ものを射出成形
して中間成形体部分を形成し几後、40℃の温度に1週
間放置してこfiを完全に架橋させ友。The masterbatch was added, heated and kneaded, and the material was injection molded to form an intermediate molded product.After cooling, it was left at a temperature of 40°C for one week to completely crosslink the material.
また比較の友めに組成の異なる軟質熱可塑性ニジストマ
ーを用い同様にして中間の成形体部分3を成形し之。For comparison, an intermediate molded body portion 3 was molded in the same manner using a soft thermoplastic nidistomer having a different composition.
こうして得られた実施例および比較例の1ラスチック成
形体の防振材としての特性を知るtめ、それぞれのばね
定数を測定し友。まfc40℃および50℃の温度で6
0分間放置しt後のクリープ量をそれぞれ測定し友。In order to learn about the properties of the plastic molded bodies of Examples and Comparative Examples thus obtained as vibration damping materials, the spring constants of each were measured. 6 at temperatures of 40°C and 50°C
Leave it for 0 minutes and measure the amount of creep after t.
測定結果を次表下欄に示す、
昇
これらの測定結果から、シリル変性EVAが全く或いは
ほとんど配合されていない熱可塑性エラストマーを用い
几比較例の成形体にシいては、ばね定数を大きくとるほ
どクリープ量が増大するが、実施例の成形体ではシリル
変性EVAの含有率を増すほどばね定数は大きくなるが
、クリープf/kにかえって減少することがわかる。The measurement results are shown in the bottom column of the following table.From these measurement results, it can be seen that the higher the spring constant, the higher the spring constant of the comparative example molded product made of thermoplastic elastomer containing no or almost no silyl-modified EVA. Although the amount of creep increases, it can be seen that in the molded bodies of Examples, the spring constant increases as the content of silyl-modified EVA increases, but the creep f/k actually decreases.
(発明の効果)
以上、本発明のプラスチック成形体は、硬質の熱可塑性
ポリマーからなる第1および第2の成形体部分と、シリ
ル変性BVA樹脂が配合された軟質の熱可塑性エラスト
マーからなり架橋されt第3の成形体部分とから構成さ
れているので、耐熱性特に高温でのクリープ特性に優れ
、防振材として好適している。(Effects of the Invention) As described above, the plastic molded article of the present invention is made of a crosslinked first and second molded article portion made of a hard thermoplastic polymer and a soft thermoplastic elastomer blended with a silyl-modified BVA resin. Since it is composed of a third molded body portion, it has excellent heat resistance, particularly creep characteristics at high temperatures, and is suitable as a vibration isolating material.
また本発明の成形体は、二頭射出成形機を用いて同時底
形することにより効率よく大量生産することができる。Furthermore, the molded product of the present invention can be efficiently mass-produced by simultaneously forming the bottom shape using a two-head injection molding machine.
第1図は本発明のグラスチック成形体の一例を示す断面
−、第2図および第3図はそれぞれ本発明の成形体を射
出成形する方法を説明する九めの断面図である。
1・・−・・・・−・・・・・・・・・・・・・・内側
成形体部分2・・・・・・・・・・・・・・・・・・・
・・・・・外側成形体部分3・・・・・・・・−・・・
・・・・・−・・・・・中間成形体部分6・・・・・・
・・・・・−・・・・・・・・・・・硬質熱可塑性ポリ
マー9・・・・・・・・・・・・・・・・・・・・・・
・儀可塑性エラストマー第1図FIG. 1 is a cross-sectional view showing an example of the plastic molded article of the present invention, and FIGS. 2 and 3 are ninth cross-sectional views illustrating a method for injection molding the molded article of the present invention. 1・・・・・・・・・・・・・・・・・・・・・Inner molded body part 2・・・・・・・・・・・・・・・・・・・
...Outer molded body part 3...
・・・・・・-・・・・・・Intermediate molded body part 6・・・・・・
・・・・・−・・・・・・・・・・・・Hard thermoplastic polymer 9・・・・・・・・・・・・・・・・・・・・・
・Plastic elastomer Figure 1
Claims (1)
離隔された第1および第2成形体部分と、該第1成形体
部分と第2成形体部分との間に延長されこれらに固着さ
れた熱可塑性エラストマーからなる第3成形体部分とか
ら成るプラスチック成形体において、第3成形体部分が
、スチレン系の熱可塑性エラストマーと、常温で架橋可
能なシリル変性のエチレン−酢酸ビニル共重合体樹脂と
を、40:60から95:5の範囲の重量比で混合した
樹脂組成物を架橋させたものであることを特徴とするプ
ラスチック成形体 2、第1および第2成形体部分の第3成形体部分と接す
る表面が、予め低温プラズマ処理されて活性化されてい
る特許請求の範囲第1項記載のプラスチック成形体。[Claims] 1. Concentric and substantially spaced apart first and second molded body parts made of a hard thermoplastic polymer, and between the first molded body part and the second molded body part; A plastic molded body comprising a third molded body part made of a thermoplastic elastomer extended and fixed thereto, the third molded body part comprising a styrene-based thermoplastic elastomer and a silyl-modified ethylene-forming body that is crosslinkable at room temperature. Plastic molded article 2, first and second moldings, characterized in that the resin composition is crosslinked with a vinyl acetate copolymer resin at a weight ratio in the range of 40:60 to 95:5. 2. The plastic molded article according to claim 1, wherein the surface of the body portion that comes into contact with the third molded body portion is activated by being previously subjected to low-temperature plasma treatment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24997784A JPS61127338A (en) | 1984-11-27 | 1984-11-27 | Plastic molded member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24997784A JPS61127338A (en) | 1984-11-27 | 1984-11-27 | Plastic molded member |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61127338A true JPS61127338A (en) | 1986-06-14 |
Family
ID=17200999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24997784A Pending JPS61127338A (en) | 1984-11-27 | 1984-11-27 | Plastic molded member |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61127338A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2766535A1 (en) * | 1997-07-25 | 1999-01-29 | Itw Fastex Italia Spa | VIBRATION DAMPING SUPPORT AND METHOD FOR MOLDING IT |
FR2788018A1 (en) * | 1999-01-05 | 2000-07-07 | Siemens Automotive Moteurs Ele | METHOD AND DEVICE FOR MANUFACTURING A MECHANICAL ASSEMBLY COMPRISING AT LEAST TWO MECHANICAL PARTS ASSEMBLED BY A CONNECTING PART MADE OF A MOLDABLE MATERIAL |
-
1984
- 1984-11-27 JP JP24997784A patent/JPS61127338A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2766535A1 (en) * | 1997-07-25 | 1999-01-29 | Itw Fastex Italia Spa | VIBRATION DAMPING SUPPORT AND METHOD FOR MOLDING IT |
FR2788018A1 (en) * | 1999-01-05 | 2000-07-07 | Siemens Automotive Moteurs Ele | METHOD AND DEVICE FOR MANUFACTURING A MECHANICAL ASSEMBLY COMPRISING AT LEAST TWO MECHANICAL PARTS ASSEMBLED BY A CONNECTING PART MADE OF A MOLDABLE MATERIAL |
WO2000040393A1 (en) * | 1999-01-05 | 2000-07-13 | Siemens Automotive Moteurs Electriques S.A. | Method and device for making a mechanical assembly comprising at least two mechanical parts assembled by a linking component made of mouldable material |
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