CN101085872A - Resin material for molding and molded product - Google Patents

Abstract

To provide a resin material for molding excellently reducing molding shrinkage and affording a molded product having excellent thin-wall moldability, high dimensional accuracy according to design and excellent stability for thermal deformation and to provide the molded product using the material. The resin material for molding comprises a thermoplastic resin, one kind of fly ash and silica fume. The average particle diameter of the silica fume is <=1/10 of the average particle diameter of the one kind of fly ash and the compounding ratio of the one kind of fly ash/silica fume is (20/80) to (80/20) expressed in terms of mass ratio. The thermoplastic resin is contained in an amount of 10-40 vol.% in the resin material for molding.

Description

Resin material for molding and moulded product

Technical field

The present invention relates to resin material for molding and moulded product, relate in particular to and to be fit to be used in resin material for molding and moulded product thereof injection forming, that can obtain the superior moulded product of dimensional precision.

Background technology

In recent years, require the moulded product of multiple shape, the metal that was in the past always using, owing to be processed into by machining etc. usually and form desired shape, so compare with moulded product with resin manufacture, the man-hour that obtains the operation till the moulded product is many, and defectives such as the property of batch process in batches difference are arranged, and therefore most metal partss are by resinifying.

But in the moulded product that adopts resin, the property produced in batches is superior, but the contraction that during the resin solidification of molten state, takes place, different moulded product when causing moulded product distortion, result to obtain size and design is difficult to obtain the design of desired moulded product.

Therefore, in the moulded product that adopts resin, at the problems referred to above, study the filler of in resin, filling mineral filler or fortifying fibre and contained resin combination, but present parts have the tendency of miniaturization, densification, as resin material for molding and moulded product thereof, the irrealizable high dimensional precision of moulded product that requires to use the resin material by in the past filling filler or fortifying fibre to obtain.

For so requirement, open in the 2005-82761 communique (patent documentation 1) the spy, though to provide a kind of is that high density contains inorganic filler, but mobile superior when being shaped, has superior dimensional precision and anisotropic resin material is a purpose for-30 ℃～100 ℃ temperature variation, optical device structure unit resin material has been proposed, it is characterized in that, with respect to polyphenylene sulfide 100 weight parts, contain 40～400 weight parts by dust (fly ash), the weighting agent that fibrous filler and/or flakey inorganic filler constitute, and in total weighting agent composition, contain the dust of 5～95 weight %.

But, the inorganic filling material of fibrous and/or flakey is compared with ball filler, the decline of resin flow that is filled with it is remarkable, in the combination of this external fibrous and/or inorganic filling material of flakey and dust, the function that can fill filler space reduces, even the amount of resin of using in an embodiment in addition press volume and converted also above half, therefore, can not expect to obtain having the moulded product of high dimensional accuracy.

In addition, open in the 2003-64266 communique (patent documentation 2) the spy, so that the degree of freedom with the shape that improves moulded product to be provided, can melt-processed, the high potting resin material of filler that can bring into play the characteristic of used filler effectively is a purpose, the high potting resin material of filling of a kind of filler has been proposed, it is characterized in that, constitute by the thermoplastic resin of 1～40 capacity % and the filler of 99～60 capacity %, but in this invention, be not to fill filler, and come landfill to fill the technological thought in its gap between filler grain, therefore can not get the high filler filling of the densification that can satisfy with the atomic filling filler of other sub-micron grade.

In addition, open 2000-336254 communique (patent documentation 3) and the spy opens in the 2003-82215 communique (patent documentation 4) the spy, the moulded product that adopts dust as mineral filler is disclosed, specifically be to disclose a kind of hybrid shaping material, the former, be the polyester material that is made of thermoplastic polyester 30～99 weight parts and dust 70～1 weight parts, the specific surface area of described dust is 1000～8000cm ²/ g, the latter is made of dust, insatiable hunger vibrin and a spot of silane coupling agent in addition.

But, as the material of filler employing dust, because it is a Ball-type packing, so even fill filler, mobile decline is also slow, can also be purpose to improve filling ratio, but owing to only fill a kind of dust as the filler composition, so the amplitude of the particle diameter of filler is so not big, can not increase to the degree as the expectation loading level, therefore, the mould shrinkage of the moulded product that obtains is especially not little, seldom to desired such moulded product with high dimensional accuracy.

So, the shaping resin material especially is shaped the thermoplastic resin compound and the moulded product that obtains, has the size by design, for the precision of the strictness that meets the demands, be very important, but can't obtain to obtain the resin material for molding of the high dimensional accuracy that can satisfy at present.

Patent documentation 1: the spy opens the 2005-82761 communique

Patent documentation 2: the spy opens the 2003-64266 communique

Patent documentation 3: the spy opens flat 2000-336254 communique

Patent documentation 4: the spy opens the 2003-82215 communique

Summary of the invention

The objective of the invention is to, address the above problem, a kind of resin material for molding is provided and adopts the moulded product of this material, can seek fully to reduce shaping shrinkage rate, and it is superior and have a stable superior moulded product to thermal distortion of high dimensional accuracy by design to obtain thin molded property.

In addition, another object of the present invention is to, a kind of resin material for molding is provided and adopts the moulded product of this material, the decline of its flowability is slow, can promptly obtain the moulded product of thin and complicated shape by the shape of design with high dimensional stability.

In addition, another purpose of the present invention is, a kind of resin material for molding is provided and adopts the moulded product of this material, and it is fit to injection forming very much except that above-mentioned purpose.

Present inventors, at the shaping resin material, especially in the injection forming thermoplastic resin, find, adopt different dust I kind and the silicon-dioxide smog (fume) of size, improve the loading level of inner these mineral fillers that exist of resin by combination, in the gap of dust I kind particle, fill the opposing party's silicon-dioxide smoke particle densely, they are performance spot contact bearing effect in molten resin mutually, finishes the present invention thus.

Resin material for molding of the present invention, it is characterized in that, contain thermoplastic resin, dust I kind and silicon-dioxide smog, the median size of described silicon-dioxide smog is below 1/10th of median size of dust I kind, the cooperation ratio of this dust I kind and silicon-dioxide smog, by mass ratio is 20/80～80/20, and preferably the particle diameter of this dust I kind is 0.5～80 μ m, and the particle diameter of this silicon-dioxide smog is 0.01～0.5 μ m.

More preferably, contain fibee reinforced material.

In addition, in above-mentioned resin material for molding of the present invention, in addition, the thermoplastic resin that preferably contains 10～40 capacity %, more preferably, the described two kinds of mineral fillers that contain are that the aggregate capacity of dust I kind and silicon-dioxide smog and the fibee reinforced material that contains as required is 99～60 capacity %.

Moulded product of the present invention is the moulded product that adopts above-mentioned each resin material for molding of the present invention, is fit to obtain by the described resin material for molding of injection forming.

Resin material for molding of the present invention, by making up specific mineral filler is dust I kind and silicon-dioxide smog, can fill these mineral fillers in a large number, adopt the moulded product of resin material for molding of the present invention simultaneously, because shaping shrinkage rate is little (for example, flow direction/orthogonal directions=0.2/0.3), and the difference of its flow direction/orthogonal directions is little, can realize high dimensional precision so have, no matter be the heavy-walled moulded product that do not wait of thickness or the moulded product of thin-walled, all have superior effect by the dimensional precision of design.

In addition, when resin material for molding of the present invention is used for injection forming, in molten resin, dust I kind and silicon-dioxide smog performance spot contact bearing effect, its rollability increases, and improves flowability, can make the moulded product of complicated shape accurately.

In addition, resin material for molding of the present invention is except that above-mentioned effect, owing to by combination dust I kind and silicon-dioxide smog, bring into play the performance of these high mineral fillers of filling effectively, so the moulded product that obtains also has following suitable effect.

1) thermal conductivity improves, and thermal diffusivity improves.

2) thermotolerance improves.

3) linear expansivity descends, and have the low hotline expansion coefficient with the high technology ceramics equal extent, and the dimensional change that heat causes is little.

4) snappiness rate, the vibration that can obtain being higher than engineering plastics subtracts declining property.

Description of drawings

Fig. 1 is the stereographic map that adopts the moulded product (90mm * horizontal 90mm * high 3mm) that resin material for molding obtains.

Fig. 2 is the stereographic map that adopts the moulded product (90mm * horizontal 90mm * high 1mm) that resin material for molding obtains.

Embodiment

Below, by preferred embodiment explanation the present invention, but the present invention is not limited to these embodiment.

Resin material for molding of the present invention, contain thermoplastic resin and dust I kind and silicon-dioxide smog, the median size of described silicon-dioxide smog is below 1/10th of median size of dust I kind, the proportioning of this dust I kind and silicon-dioxide smog is 20/80～80/20 by mass ratio, and is preferred, the particle diameter of this dust I kind is 0.5～80 μ m, the particle diameter of this silicon-dioxide smog is 0.01～0.5 μ m, and more preferably, these dust I kind and silicon-dioxide smog are globular.

So, by different dust I kind and the silicon-dioxide smog of combination particle diameter, the silicon-dioxide smog that particle diameter is little enters into the gap of the big dust I kind of particle diameter, by forming multiple granularity structure, can in molten resin, bring into play maximum spot contact bearing effect, simultaneously can give additional as far as possible inorganic in nature, can obtain superior dimensional stability resins such as thermoplastic resins.

Be used for thermoplastic resin of the present invention, for example, refer to the degree that can be shaped, can obtain plastic resin by heating.Its kind does not limit especially, for example, can enumerate from polyethylene terephthalate, polybutylene terephthalate, poly terephthalic acid tetrahydrobenzene dimethylene ester, PEN, PBN, poly-m-phthalic acid/ethylene glycol terephthalate, poly-m-phthalic acid/mutual-phenenyl two acid bromide two alcohol ester, poly-m-phthalic acid/terephthalic acid tetrahydrobenzene dimethylene ester, poly-(p-Para Hydroxy Benzoic Acid/ethylene glycol terephthalate), non-liquid crystal liquid crystal property semi-aromatic polyester, polyester such as non-liquid crystal liquid crystal property Wholly aromatic polyester, polycarbonate, fatty polyamide, the aliphatic-aromatic polymeric amide, polymeric amide such as fully aromatic polyamide, the polyoxy methylene, polyimide, polybenzimidazole, polyketone, polyether-ether-ketone, polyetherketone, polyethersulfone, polyphenylene oxide, phenoxy resin, polyphenylene sulfide, liquid crystalline polymers, polypropylene, polyethylene, olefin polymers such as polystyrene, ethylene/propene copolymer, ethene/butene-1 copolymer, ethylene/propene/non-conjugated diene multipolymer, the ethylene/ethyl acrylate multipolymer, the ethylene/methacrylic acid glycidyl ester copolymer, ethylene/acetic acid ethylene/methacrylic acid Racemic glycidol multipolymer, and ethylene/propene-g-Maleic Acid, Anhydrous multipolymer, olefin copolymers such as ABS, the polyester polyether elastomer, the mixture of known any thermoplastic resin more than a kind or 2 kinds of selecting in the elastomericss such as pet copolyester elastomerics.

Especially, from the aspect of flowability and fillibility, one or both mixtures in an instant that use polyphenylene sulfide, polymeric amide, polycarbonate, polypropylene, polyurethane(s), liquid crystalline polymers etc. can suit.

In the present invention, dust I kind and silicon-dioxide smog are adopted in combination.

,, dust I～IV kind is arranged herein, in the present invention, adopt the dust I kind of this JIS standard according to the JISA6201 standard for dust.

So, even dust, also can not adopt dust II kind～IV kind etc., by adopting the combination of dust I kind and silicon-dioxide smog, compare when adopting other dust II kind～IV kind etc., the flowability of available material improves, and shaping shrinkage rate reduces, simultaneously can be thin molded, can realize effect of the present invention well.

In addition, in the present invention, dust I kind has following function, that is, because the contained ratio height of spheroidal particle, so the spot contact bearing effect is high, in addition because unburned carbon is minimum, thus the oil number minimum, even under the high situation of filling, mobile decline is also little.

Especially, each median size of described dust I kind and silicon-dioxide smog, for these specific dust I kinds of high filling densely and two kinds of fillers of silicon-dioxide smog, improve dimensional stability, preferably, the median size of silicon-dioxide smog is below 1/10th of median size of dust I kind, is more preferably below 1/20th, and most preferably be more than 1/40th.

Above-mentioned median size is taken pictures by adopting scanning electron microscope, measures the major diameter and the minor axis of each particle, calculates average major diameter and average minor axis respectively, obtains by average this average major diameter and average minor axis.

Dust I kind and the silicon-dioxide smog different by combination particle diameter like this mix, form the filler of multiple granularity structure, the silicon-dioxide smoke particle that forms this particle diameter enters the multiple granularity structure between this dust I kind, can in resin material, fill a large amount of mineral fillers densely, simultaneously thus can be in molten resin, bring into play effective spot contact bearing effect, therefore can improve the dimensional precision of moulded product.

In addition, the silicon-dioxide smog that particle diameter is little, although fill primary particle in resin material, the cohesion of this primary particle is closed the piece particle 2 times～4 times that form size with appropriateness, the spot contact bearing effect can also be brought into play in the gap of the intergranular that packing ratio is bigger.

In addition, in order to increase the rotation in the molten resin when the injection forming, preferred, this dust I kind or silicon-dioxide smog are that its surface has some concavo-convex shapes.

This dust I kind, being fit to adopt particle diameter is 0.5～80 μ m's, preferred employing particle diameter is 0.5～50 μ m's, in addition, and this silicon-dioxide smog, being fit to adopt particle diameter is 0.01～0.5 μ m's, preferred employing particle diameter is 0.05～0.5 μ m's, by the dust I kind and the silicon-dioxide smog of the above-mentioned particle size range of combination employing, can fill in resin material densely, simultaneously the spot contact bearing effect can be more effectively brought into play, dimensional precision can be improved.

Above-mentioned particle diameter as mentioned above, is a value of utilizing the micro-mensuration of scanning electron.

In addition, especially, these dust I kind and silicon-dioxide smog preferably have spherical shape, so can the described spot contact bearing effect of maximum performance.

Herein, so-called " spherical ", not only be meant the ball of full spherical, and comprise what ellipse or Pear-Shaped etc., or the surface of these shapes has the three-dimensional shape of delicate almost spherical such as concavo-convex granular to a certain degree, be the shape except that two-dimensional shapes such as fibrous or tabular, flakey, more preferably sphere shape.

That is, the closer shape like sphere of granular formation for example, is preferably enumerated average major diameter/average minor axis and is more than 1 the shape less than 3.

So, the filler of two-dimensional shapes such as, flakey fibrous or tabular by removing, even fill mineral filler in resin, mobile decline is also slow, can guarantee good flowability.

The proportioning of dust I kind and silicon-dioxide smog is 20/80～80/20 by mass ratio, and is preferred 35/65～65/35, if exceed above-mentioned scope, mobile decline seldom arrives the moulded product of complicated shape sometimes.

In addition, in order to improve the intensity of available moulded product more, also can contain fibee reinforced material as required.

As fibee reinforced material, can use have stable on heating and spring rate, fibrous Rankine such as staple fibre that mechanical characteristic such as intensity, rebound degree is superior, whisker, fine strip body, can enumerate, whiskers such as glass fibre, carbon fiber, sapphire whisker, silicon carbide fiber, potassium titanate or aluminum borate for example, organic fibres such as steel fibers such as boron fibre or titanium fiber, Kevlar etc., but more preferably glass fibre.

Diameter or length about fibee reinforced material, if staple length is long, difficulty and thermoplastic resin or dust I kind and silicon-dioxide smog is blending dispersion equably, if it is opposite too short, because it is insufficient as the effect of Rankine, so usually, preferably use staple length 0.1～10mm, diameter the scope of 9～15 μ m fibee reinforced material.

If this staple length less than 0.1mm, then seldom arrives the superior moulded products of physical strength such as flexural strength.

On the other hand, if this staple length surpasses 10mm, when forming moulded product, fibee reinforced material exposes on the surface, influences outward appearance.

The cooperation ratio of fibee reinforced material, do not limit especially, but preferably in resin material for molding 5～40 capacity %, this is because if less than 5 capacity %, the effect that intensity improves is little, if surpass 40 capacity %, the mobile deterioration, or " nest " such defective takes place in the moulded product that obtains sometimes, so preferably do not exceed this scope.

Above-mentioned thermoplastic resin, above-mentioned dust I kind, silicon-dioxide smog reach the cooperation ratio of the fibee reinforced material that cooperates as required, thermoplastic resin, convert by measure preferred 10～40 capacity %, more preferably 20～40 capacity %, 30～40 capacity % most preferably, surplus is above-mentioned dust I kind, silicon-dioxide smog and fibee reinforced material or the following additives of adding as required.

If the content of thermoplastic resin surpasses 40 capacity %, it is big that the shaping shrinkage rate of the moulded product that obtains becomes, and difficulty is guaranteed dimensional precision sometimes, so not preferred.

In addition, if the content of thermoplastic resin less than 10 capacity %, is difficultly sometimes guaranteed the required flowability that is shaped, so not preferred.

In resin material for molding of the present invention, except that above-mentioned Rankine, also can cooperate additives such as thermo-stabilizer, photostabilizer, antioxidant, plasticizer, slip(ping)agent, tinting material, whipping agent, releasing agent, shock-resistant improving agent as required.

For modulating resin material for molding of the present invention, mix above-mentioned resin, above-mentioned dust I kind and silicon-dioxide smog and the other Rankine that adds as required etc. equably in above-mentioned ratio.About blending means, do not limit especially, can just can by these compositions of uniform mixing.Also can be used as mixed powder and be pre-mixed dust I kind and silicon-dioxide smog, also can mix these materials simultaneously.

Specifically be, adopt closed mixing machine, kneader, roller, mixed thermoplastic resin, dust I kind, silicon-dioxide smog etc., then, adopt the manufacturing of heat fused mixing rolls such as single shaft or biaxial extruder, especially, consider the preferred biaxial extruder that suitably adopts from the inhomogeneity angle of the high potting resin material of filler that obtains.

In addition, the thermoplastic resin that cooperates, also consider from aspects such as the composition homogeneity of the constituent that obtains, mixing property, from operation, more preferably be processed into pathization or the Powdered employing identical, also can adopt particulate state, shape such as Powdered arbitrarily, under the big situation of the use level of dust I kind or silicon-dioxide smog with used dust I kind or silicon-dioxide smog, consider from making the efficient aspect, preferably adopt pathization or pulverous.

Under the situation that adopts injection forming, preferably, mix above-mentioned resin, above-mentioned dust I kind and silicon-dioxide smog, for example be shaped as particulate state, the raw material of using used as injection forming, with the temperature more than the softening temperature of this thermoplastic resin, melt the mixing material of mixing above-mentioned dust I kind, silicon-dioxide smog and resin etc., as the feed particulate material of injection.

Described feed particulate material melts mixingly in the heating cylinder of injection machine inside once more, is filled in by injection device in the mould of the shape that requires, and can access moulded product.

Resin material for molding of the present invention, the enough common forming and machining methods of energy form the moulded product of target.

For example, can adopt known moulding methodes such as injection forming, extrusion molding, drawing, reaction-injection moulding.

Especially in injection forming, in addition, can be shaped as three-dimensional shape arbitrarily accurately, can high reproducibility, high dimensional accuracy ground makes the moulded product etc. of the thin-walled of complicated shape or free shape.

So, adopt resin material for molding of the present invention, then mobile superior, thus can high dimensional accuracy ground make the moulded product that the thickness of complicated shape does not wait, moulded product that also can high dimensional accuracy ground manufacturing thin-walled.

Embodiment

Below, by embodiment, comparative example and test example explanation the present invention.

Material:

Polyphenylene sulfide A, Off オ one ト ロ Application A0220 Polyplastics Co., Ltd. (JP) 30, Azuchimachi 2-chome, Higashi-ku, Osaka-shi, Osak makes (thermoplastic resin, proportion 1.3)

Polyphenylene sulfide B, Off オ one ト ロ Application 6165A4 Polyplastics Co., Ltd. (JP) 30, Azuchimachi 2-chome, Higashi-ku, Osaka-shi, Osak makes (thermoplastic resin, proportion 1.96)

Dust I kind, Off ア イ Na Star シ ユ four electric Industry Co., Ltd (proportion 2.3, median size 5.5 μ m, particle diameter 0.5～30 μ m)

Dust II kind, the middle part Off ア イ Na Star シ ユ テ of Co., Ltd. Network ノ middle part (proportion 2.3, median size 10 μ m, particle diameter 1～50 μ m)

Dust III kind, the middle part Off ア イ Na Star シ ユ テ of Co., Ltd. Network ノ middle part (proportion 2.3, median size 10 μ m, particle diameter 1～50 μ m)

Dust IV kind, エ コ ア Star シ ユ four electric Industry Co., Ltd (proportion 2.3, median size 40 μ m, particle diameter 5～100 μ m)

Silicon-dioxide smog, white rouge エ Le ケ system Co., Ltd. (proportion 2.3, median size 0.2 μ m, particle diameter 0.05～0.5 μ m)

Glass fibre, CS3J-256 Nitto Boseki Co. Ltd (proportion 2.9)

Embodiment 1～3, comparative example 1～8

In the cooperation ratio shown in the table 1, mix each raw material with mixing tank, adopt the cylinder temperature to be set in the twin shaft extrusion shaper of 300 ℃ 35mm Φ (pond shellfish ironworker makes, PCM30), evenly fusing is mixing to press 300 ℃ of design temperatures, rotating speed 200rpm, forms it into particle.

Each particle that obtains packed into, and injection machine (make: プ ロ マ Star ト 100A) by Sumitomo heavy-duty machine tool industry, obtain the test film (side gate of vertical 90mm * horizontal 90mm * high 3mm, gate size: moulded product wide 5mm * high 1mm), and test film (side gate, the gate size: moulded product wide 5mm * high 1mm) of vertical 90mm * horizontal 90mm * high 1mm.

Each moulded product to obtaining in the foregoing description 1～3 and comparative example 1～8 carries out following test.

Fluidity test

" flow test device, the CFT-500D " that adopts Shimadzu Seisakusho Ltd. to make, as condition determination, under 300 ℃ of temperature, load 50kgf, the viscosity of material when measuring the aperture that passes through diameter of phi 1mm, long 10mm.

Plasticity

Plasticity (1) is at the test film of above-mentioned vertical 90mm * horizontal 90mm * high 3mm that is shaped (side gate, gate size: wide 5mm * high 1mm) during moulded product, will fully be filled in the mould, be evaluated as and can be shaped, with what fully fill, be evaluated as and can not be shaped.

Plasticity (2) is at the test film of above-mentioned vertical 90mm * horizontal 90mm * high 1mm that is shaped (side gate, gate size: wide 5mm * high 1mm) during moulded product, will fully be filled in the mould, be evaluated as and can be shaped, with what fully fill, be evaluated as and can not be shaped.

Dimensional precision

Vertical/horizontal each of measuring the test film (vertical 90mm * horizontal 90mm * high 3mm) obtain with digital display calliper (ミ Star ト ヨ manufacturing) is long, with the described die size of same mensuration relatively, calculate shaping shrinkage rate.

In addition, as shown in Figure 1, with the distance of gate land and cast gate opposing face as flow direction length, with the distance between side surface direction as right angle orientation length.

In addition, for the test film that obtains (vertical 90mm * horizontal 90mm * high 1mm), too as shown in Figure 2, same with aforesaid method, by mensuration shaping shrinkage rate shown in Figure 2, obtain the roughly equal result of shaping shrinkage rate with described each test film (vertical 90mm * horizontal 90mm * high 3mm).

Below, table 1 illustrates The above results.

Table 1

			Embodiment			Comparative example
														1	2	3	1	2	3	4	5	6	7	8
			Proportioning vol%	Polyphenylene sulfide A		34	34	34	34	34	34	37	37												50	37	-
Polyphenylene sulfide B		-												-	-	-	-	-	-	-	-	-	100
				Dust (I kind)		35	22	9	-	-	-	-	-											-	-	-
Dust (II kind)		-												-	-	-	-	22	20	41	28	-	-
				Dust (III kind)		-	-	-	22	-	-	-	-											-	-	-
Dust (IV kind)		-												-	-	-	22	-	-	-	-	-	-
				Silicon-dioxide smog		9	22	35	22	22	22	21	-											-	41	-
Glass fibre		22												22	22	22	22	22	22	22	22	22	-
				Mobile	300 ℃ of viscosity (Pas)		370	310	380	2800	4000	700	400											4000	200	＞10000	1200
1. shaping could be		Can	Can											Can	Can not	Can not	Can	Can	Can not	Can	Can not	Can
					2. shaping could be		Can	Can	Can	Can not	Can not	Can not	Can										Can not	Can	Can not	Can not
Dimensional precision	Shaping shrinkage rate (%)	Flow direction	0.20											0.20	0.20	-	-	0.20	0.25	-	0.50	-					0.35
				Orthogonal directions	0.30	0.30	0.30	-	-	0.30	0.35	-	0.80										-	0.65

Show thus, the moulded product of embodiment 1～3, owing to adopt different dust I kind and the silicon-dioxide smog of median size, so mobile superior, shaping shrinkage rate is also little simultaneously, thin molded superior, dimensional precision is fabulous.

Resin material for molding of the present invention, as the equivalent material of all moulded products of in the past employing thermoplastic resin, pottery, engineering plastics or metal, can be used in building materials, electronics electricity relevant device, precision instrument relevant device, office with multiple uses such as equipment, automobile associated components, signal equipment, hot machine parts.

Claims (6)

1. a resin material for molding is characterized in that,

Contain thermoplastic resin, dust I kind and silicon-dioxide smog, the median size of described silicon-dioxide smog is below 1/10th of median size of dust I kind, and the cooperation ratio of this dust I kind/silicon-dioxide smog is 20/80～80/20 by mass ratio.

2. resin material for molding as claimed in claim 1 is characterized in that,

The particle diameter of this dust I kind is 0.5～80 μ m, and the particle diameter of this silicon-dioxide smog is 0.01～0.5 μ m.

3. resin material for molding as claimed in claim 1 or 2 is characterized in that,

Also contain fibee reinforced material.

4. as any one described resin material for molding in the claim 1～3, it is characterized in that,

This thermoplastic resin that contains 10～40 capacity %.

5. a moulded product is characterized in that,

Adopt any one described resin material for molding in the claim 1～4.

6. moulded product as claimed in claim 5 is characterized in that,

Make by the described resin material for molding of injection forming.

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