JP5446964B2 - Polyphenylene ether resin composition having excellent wear resistance and member comprising the same - Google Patents

Description

  The present invention relates to a polyphenylene ether-based resin composition having excellent wear resistance. More specifically, as a molding material for a paper guide member for guiding the conveyance of print recording paper provided in various printers such as inkjet printers, copiers, other printing recording apparatuses, image scanners, facsimiles, and these multifunction devices. The present invention relates to a suitable polyphenylene ether-based resin composition, and more particularly, to a polyphenylene ether-based resin composition that is excellent in abrasion resistance and that can provide a paper guide member that does not cause damage such as scratches on conveyed paper. The present invention also relates to a member such as a paper guide member formed by molding the polyphenylene ether-based resin composition, and a printing recording apparatus using the member.

A print recording apparatus such as a printer is provided with a paper guide member as shown in FIG. 1 or 2 as a member for guiding the conveyance (paper feed) of the print recording paper.
The paper guide member 1 shown in FIG. 1A (perspective view) and FIG. 1B (enlarged view of a cross section taken along the line ZZ in FIG. 1A) is a long thin plate-like main body 1A. On one plate surface, a plurality of convex portions 1B are arranged in parallel at intervals in the extending direction of the main body portion 1A. The top surface 1b of each convex portion 1B is a flat surface parallel to the plate surface of the main body 1A, and the top surface 1b conveys the printing recording paper (the printing recording paper 3 in FIG. 1B). To guide.

  Wide wall portions 1C and 1C are raised at both ends of the main body portion 1A. The wall portions 1C and 1C are brought into contact with the inner wall surface of the printing recording apparatus to fix the paper guide member 1. . 1D and 1D are fixing screw holes.

  The paper guide member 2 in FIG. 2 is formed by arranging a plurality of convex portions 2B side by side in the extending direction of the main body portion 2A on a long main body portion 2A curved in an arc shape in section. It is configured to guide the print recording paper surface conveyed by the flat surface 2b of the section 2B. Wall portions 2C and 2C are provided at both ends of the main body portion 2B, and the paper guide member 2 is fixed by contacting the wall portions 2C and 2C with the inner wall surface of the printing recording apparatus. 2D and 2D are fixing screw holes.

  In such a paper guide member, the extending direction of the main body (the Y direction in FIGS. 1 and 2) is perpendicular to the conveyance direction of the print recording paper (the X direction in FIGS. 1 and 2). Installed in the print recorder.

  Note that the widths of the protrusions provided on the paper guide member are not necessarily the same, and differ depending on the positions of the protrusions. Also, the interval between the protrusions is not necessarily equal, but depends on the size of the paper being conveyed, etc. Therefore, the paper is designed to be guided stably.

  However, the protruding height of the convex portion from the main body portion of the paper conveyance surface is the same. For example, in the paper guide member 1 of FIG. 1, the distance between the top surface 1b of the convex portion 1B and the plate surface of the main body portion 1A is All are the same.

In addition, each convex portion is a long ridge in the paper conveyance direction (the direction of arrow X in FIGS. 1 and 2), and the length of the paper is supported by a flat surface such as the top surface of the ridge. Paper is conveyed in the direction.
With such a paper guide member having a ridge-like convex portion, the printing recording paper is in the length direction of the convex portion (X direction in FIGS. 1 and 2), that is, the extending direction of the paper guide member (FIG. 1, FIG. 2 in the direction perpendicular to the Y direction).

  Such a paper guide member is manufactured by integral molding by injection molding of a synthetic resin composition. Conventionally, as a synthetic resin of the molding raw material, polystyrene resin is relatively inexpensive and excellent in moldability. It is used.

  By the way, polyphenylene ether resin is a resin having excellent properties such as mechanical strength, electrical properties, heat resistance, dimensional stability, etc., but has a drawback of poor molding processability due to its high melt viscosity. ing. Therefore, polyphenylene ether resins are usually used as resin compositions containing various resins for the purpose of improving the molding processability, and those using styrene resins as compounded resins are provided. Yes.

  Conventionally, it is known that wollastonite is blended in a composite resin composition of a polyphenylene ether resin and a styrene resin in order to prevent warping of a molded product (for example, Patent Document 1).

  However, conventionally, no technique has been proposed that uses a filler such as wollastonite to improve the wear resistance of the polyphenylene ether-based resin composition, and the moderate wear resistance required particularly for paper guide members. In order to realize the above, no investigation has been made on blending a filler such as wollastonite with the polyphenylene ether-based resin composition.

Japanese Patent Laid-Open No. 2004-217771

  The paper guide member has not only requirements for moldability and price but also a long shape as shown in FIGS. Heat resistance that can withstand heat generation, chemical resistance to printing ink, and the like are required, and wear resistance against sliding with the transported printing recording paper is also required.

In other words, the paper guide member is such that the print recording paper is slid and guided on the paper conveyance surface of the convex portion (for example, the top surface 1b in FIG. 1). Depending on the transport amount of the recording paper (the number of transported paper or the transported paper length in the case of roll paper), the recording paper is worn by sliding.
When the convex portion of the paper guide member is worn, a difference in level occurs on the paper conveyance surface of the convex portion between the convex portion with high wear and the convex portion with low wear, or the paper conveyance surface of the convex portion is inclined. Cannot be transported stably. In this case, the print recording paper is not transported in the designed transport direction, but is transported in a direction inclined with respect to the designed transport direction, thereby causing a print misalignment or a paper jam. Printing becomes impossible.

  For example, in the case of an ink jet printer, the paper guide member is fixedly attached to the inner wall of the printer under the carriage mechanism in which the ink cartridge reciprocates and various members fixed in the printer. It is usually impossible to replace the sheet, and in general, the durable printing amount due to wear of the paper guide member is the durable printing amount of the printing recording apparatus itself.

  For this reason, the improvement in the wear resistance of a general-purpose paper guide member made of a styrene resin such as the present impact-resistant polystyrene (rubber-modified polystyrene: HIPS) is important for improving the durability of the printing recording apparatus. Development item.

  However, when the hardness of the paper guide member is increased in order to improve the wear resistance of the paper guide member, the print recording paper conveyed by the paper guide member slides on the convex portion of the paper guide member, thereby causing scratches and the like. Since it is damaged, it is necessary to fully consider the influence on the paper in order to improve the wear resistance of the paper guide member.

  The present invention has been made in view of the above-described conventional situation, sufficiently satisfying the dimensional accuracy, heat resistance, and chemical resistance required for the paper guide member, and against sliding of the printed recording paper to be conveyed. It is an object of the present invention to provide a polyphenylene ether-based resin composition suitable for a paper guide member that is excellent in wear resistance and that does not damage the conveyed paper such as scratches, and a member made thereof.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have obtained a polyphenylene ether-based resin composition in which a filler having a Mohs hardness of 3 to 5 and a fluororesin are blended with a polyphenylene ether resin as a molding material for a paper guide member. It has been found that by using it, it is possible to obtain excellent wear resistance to the extent that the printed recording paper is not damaged.

  The present invention has been achieved on the basis of such findings, and the gist thereof is as follows.

[1] With respect to 100 parts by weight of a resin component containing (A) 20 to 80% by weight of a polyphenylene ether resin and (B) 80 to 20% by weight of a styrene-based resin, 5 to 45 parts by weight of a filler and (D) 2 to 30 parts by weight of a fluororesin , wherein the filler is wollastonite. object.

[2] [1] Oite, polyphenylene ether-based resin composition, wherein the fluororesin is characterized in that it is a polytetrafluoroethylene.

[3] Oite to [1] or [2], the proportion of the filler relative to the resin component 100 parts by weight is 5 to 40 parts by weight, wherein the proportion of the fluorine resin is 5 to 25 parts by weight A polyphenylene ether resin composition.

[ 4 ] In any one of [1] to [ 3 ], the polyphenylene ether resin composition is for the paper guide member described below.
A main body extending in a direction intersecting with the paper transport direction, and a convex portion protruding from the main body, and a plurality of the convex portions are arranged at intervals in the extending direction of the main body. A paper guide member that is provided and is guided by sliding the paper on the convex portion.

[ 5 ] The polyphenylene ether resin composition according to any one of [1] to [ 4 ], wherein the polyphenylene ether resin composition is used for a guide member of a printing recording paper of a printer.

[ 6 ] A member obtained by injection-molding the polyphenylene ether-based resin composition according to any one of [1] to [ 5 ].

[ 7 ] A printing recording apparatus comprising the member according to [ 6 ].

The polyphenylene ether resin composition of the present invention is excellent in wear resistance. Furthermore, it satisfies the dimensional accuracy, heat resistance, and chemical resistance required for the paper guide member, and has excellent wear resistance against sliding of the printed recording paper being transported, and scratches on the transported paper, etc. No damage.
For this reason, if it is a paper guide member formed by molding the polyphenylene ether-based resin composition of the present invention, it is possible to improve the durable printing amount such as the number of durable printed sheets of the paper guide member and to provide printing provided with this paper guide member. The durability of the recording apparatus can be improved.

It is a figure which shows an example of embodiment of a paper guide member, (a) A figure is a perspective view, (b) A figure is sectional drawing which follows the ZZ line | wire of (a) figure. It is a perspective view which shows the other example of embodiment of a paper guide member.

  Hereinafter, embodiments of the present invention will be described in detail.

[Polyphenylene ether resin composition]
The polyphenylene ether-based resin composition of the present invention comprises (C) 10 parts by weight of (A) 20 to 80% by weight of a polyphenylene ether resin and 100 parts by weight of a resin component containing (B) 80 to 20% by weight of a styrene-based resin. A polyphenylene ether resin composition comprising 5 to 45 parts by weight of a filler having a Mohs hardness of 3 to 5 according to stepped Mohs hardness and 2 to 30 parts by weight of (D) a fluororesin.

  In the present specification, “to” is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value. In the present specification, a “group” such as an alkyl group may or may not have a substituent unless otherwise specified. Further, in the case of a group having a limited number of carbons, the number of carbons means a number including the number of carbons that the substituent has.

<(A) Polyphenylene ether resin>
The (A) polyphenylene ether resin used in the present invention is a homopolymer or copolymer having a structure (repeating unit) represented by the following general formula (1).

(Wherein, two Q _{1 s} each independently represent a hydrogen atom, a halogen atom, a primary or secondary alkyl group, an aryl group, an alkylamino group, a haloalkyl group, an alkoxy group, or a haloalkoxy group; Two Q ₂ 's independently represent a hydrogen atom, a halogen atom, a primary or secondary alkyl group, an aryl group, a haloalkyl group, an alkoxy group, or a haloalkoxy group, and m represents an integer of 10 or more. (However, both Q ₁ cannot be a hydrogen atom.)

In the general formula (1), when Q ₁ is a halogen atom, a chlorine atom or a bromine atom is preferable.
In the general formula (1), when Q ₁ is a primary alkyl group, preferred examples are methyl group, ethyl group, n-propyl group, n-butyl group, n-amyl group, isoamyl group, 2 An alkyl group having 1 to 10 carbon atoms such as a methylbutyl group, an n-hexyl group, a 2,3-dimethylbutyl group, a 2-, 3- or 4-methylpentyl group, or a heptyl group;
A suitable example in the case where Q ₁ is a secondary alkyl group is an alkyl group having 4 to 10 carbon atoms such as an isopropyl group, a sec-butyl group or a 1-ethylpropyl group.
A preferable example when Q ₁ is an aryl group is a phenyl group, and a preferable example when Q ₁ is an alkylamino group is one having 1 to 5 carbon atoms such as a dimethylamino group, a diethylamino group, and a dibutylamino group. An alkylamino group having an alkyl chain.
In the general formula (1), as a preferable example when Q ₁ is a haloalkyl group, a group in which one or more hydrogen atoms of each of the groups described above as preferable examples of the alkyl group are substituted with a halogen atom. Is mentioned.
Preferable examples when Q ₁ is an alkoxy group include alkoxy groups corresponding to the above-described groups as preferable examples of the alkyl group, and examples of the haloalkoxy group include one or more in the alkoxy group. And a group in which a hydrogen atom is substituted with a halogen atom.
Q ₁ is preferably a hydrogen atom, a primary or secondary alkyl group, or an aryl group.

In the general formula (1), as a suitable example when Q ₂ is a primary or secondary alkyl group, an aryl group, a haloalkyl group, an alkoxy group or a haloalkoxy group, the same as in Q ₁ Groups.

In the present invention, Q ₁ and Q ₂ are each independently preferably a hydrogen atom, a primary or secondary alkyl group, or an aryl group, Q ₁ is more preferably an alkyl group or a phenyl group, and has 1 to 4 carbon atoms. In particular, and Q ₂ is more preferably a hydrogen atom.

  In the present invention, the (A) polyphenylene ether resin is used in order to adjust the molecular weight and improve various properties such as melt viscosity and impact strength within the range not impairing the performance of the present invention. A repeating unit other than the structure represented by 1) may be included.

  Suitable homopolymers of (A) polyphenylene ether resin include, for example, those composed of repeating units derived from 2,6-dimethyl-1,4-phenylene ether. A suitable copolymer is a repeating unit derived from 2,6-dimethyl-1,4-phenylene ether and a repeating unit derived from 2,3,6-trimethyl-1,4-phenylene ether. The random copolymer which consists of a combination is mentioned.

  The (A) polyphenylene ether resin preferably has an intrinsic viscosity at 30 ° C. of 0.2 to 0.8 dl / g measured in chloroform. More preferably, the intrinsic viscosity is 0.2 to 0.7 dl / g, and still more preferably 0.25 to 0.6 dl / g. When the intrinsic viscosity is 0.2 dl / g or more, the wear resistance, impact resistance and mechanical strength of the composition tend to be improved, and when it is 0.8 dl / g or less, the moldability is improved. Tend to. Two or more kinds of polyphenylene ether resins having different intrinsic viscosities may be used in combination to make this intrinsic viscosity range.

  In this invention, (A) polyphenylene ether resin may be used individually by 1 type, and 2 or more types may be mixed and used for it.

<(B) Styrenic resin>
The (B) styrenic resin used in the present invention means a polymer or copolymer containing 50% by weight or more of a repeating unit derived from an aromatic vinyl compound, or a rubber-modified product of these polymers. To do.

  Examples of the aromatic vinyl compound include α-alkyl-substituted styrene such as styrene and α-methylstyrene, nuclear alkyl-substituted styrene such as p-methylstyrene, o-ethylstyrene, vinyltoluene, o- or p-dichlorostyrene. It is done.

  Monomers other than aromatic vinyl compounds include vinyl cyanide compounds such as acrylonitrile, methacrylonitrile and ethacrylonitrile, and (meth) such as methyl, ethyl, propyl, n-butyl and n-hexyl of acrylic acid and methacrylic acid. Acrylic ester compounds, maleimides such as maleimide, N-methylmaleimide, N-cyclohexylmaleimide, N-phenylmaleimide, acrylamide compounds such as acrylamide and N-methylacrylamide, unsaturated acid anhydrides such as maleic anhydride and itaconic anhydride Products, unsaturated acids such as acrylic acid and methacrylic acid, glycidyl acrylate, glycidyl methacrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, and methoxypolyethylene glycol methacrylate Various vinyl compounds can be mentioned.

Specific examples of (B) styrene resin include polystyrene (GPPS), acrylonitrile-styrene resin (AS resin), methyl methacrylate-styrene resin (MS resin), and the like.
The weight average molecular weight of these (B) styrenic resins is usually 50,000 or more, preferably 100,000 or more, more preferably 150,000 or more, and the upper limit is usually 500, 000 or less, preferably 400,000 or less, and more preferably 300,000 or less.

The (B) styrenic resin used in the present invention may be one in which the above-mentioned various polymers are further modified with rubber. Examples of the rubber include polybutadiene, styrene-butadiene copolymer, polyisoprene, ethylene- A propylene copolymer etc. are mentioned. Specifically, rubber-modified polystyrene (HIPS), styrene-butadiene-styrene copolymer (SBS), hydrogenated styrene-butadiene-styrene copolymer (SEBS), styrene-isoprene-styrene copolymer (SIS). ), Hydrogenated styrene-isoprene-styrene copolymer (SEPS), acrylonitrile-butadiene-styrene resin (ABS resin), methyl methacrylate-butadiene-styrene resin (MBS resin), butadiene of the ABS resin, ethylene- Examples thereof include a resin (AES resin) substituted with a propylene copolymer.

  (B) As a manufacturing method of a styrene resin, well-known methods, such as an emulsion polymerization method, a solution polymerization method, a suspension polymerization method, or a block polymerization method, are mentioned.

  (B) As the styrene-based resin, polystyrene (GPPS) and rubber-modified polystyrene (HIPS) are preferable in view of compatibility with (A) polyphenylene ether resin. In particular, when impact resistance is required, rubber-modified polystyrene is more preferable.

  In the present invention, the styrene resin may be used alone or in combination of two or more.

  In particular, (B) as a styrene resin, the combined use of polystyrene (GPPS) and rubber-modified polystyrene (HIPS) is advantageous in improving moldability by polystyrene (GPPS) and in impact resistance by rubber-modified polystyrene (HIPS). And can be obtained. In this case, it is effective to use the rubber-modified polystyrene (HIPS) at 80 to 10% by weight, particularly 70 to 20% by weight in the total of polystyrene (GPPS) and rubber-modified polystyrene (HIPS). It is preferable in that it is exhibited.

<Resin component>
The resin component of the polyphenylene ether resin composition according to the present invention is preferably 20 to 80% by weight of polyphenylene ether resin, more preferably 20 to 70% by weight, particularly preferably 20 to 50% by weight, and preferably styrene resin. 80 to 20% by weight, more preferably 80 to 30% by weight, particularly preferably 80 to 50% by weight. By making the polyphenylene ether resin in the resin component 20% by weight or more, the load deflection temperature and mechanical strength can be made excellent. By making the polyphenylene ether resin 80% by weight or less, the resin composition Since the flowability of the resin is kept good and the molding process is facilitated, the performance of the obtained molded product can be made excellent without causing deterioration of resin retention during molding.

In addition, in the polyphenylene ether-type resin composition which concerns on this invention, in the range which does not impair the effect of this invention, other resin other than the component of the said resin can be mix | blended. Examples of other resins include polyamide resin, polyimide resin, polyetherimide resin, polyurethane resin, polyphenylene sulfide resin, polysulfone resin, polyolefin resin (polyethylene resin, polypropylene resin, etc.), polybutylene terephthalate resin (PBT), polyethylene terephthalate. Thermoplastic polyester resin such as resin (PET), polycarbonate resin, polymethacrylate resin, polyacetal resin, polyacrylonitrile resin, acrylic resin, and other thermosetting resins such as epoxy resin, melamine resin, silicone resin, etc. Is mentioned. These thermoplastic resins and thermosetting resins can be used in combination of two or more. The blending amount of these other resins is preferably 50% by weight or less, more preferably 45% by weight or less in the resin component.

<(C) Filler>
In the present invention, by adding a filler having a Mohs hardness of 3 to 5 with a 10-step Mohs hardness (hereinafter, simply referred to as “Mohs hardness”) to the above resin component at a predetermined ratio, the wear resistance is increased. To improve.

The reason why a filler having a Mohs hardness of 3 to 5 is used is as follows.
Usually, calcium carbonate is used as a filler for printing recording paper in order to improve whiteness, opacity, gloss, oil absorption, etc., and to improve the durability of the paper by making it neutral. And although this calcium carbonate also becomes a factor which wears a paper guide member by sliding with a paper guide member, this inventor is equal to or more than the calcium carbonate currently used for paper on a paper guide member. It has been found that by blending a filler having a slightly hard hardness, the paper guide member can be prevented from being worn by sliding with the paper without damaging the paper.

  Usually, the filler blended in paper such as printing recording paper is calcium carbonate. Since the Mohs hardness of the calcium carbonate is about 3, in the present invention, the Mohs hardness is 3 to 5, particularly the Mohs hardness of 3.5. A filler of about ~ 4.5 is used.

  On the other hand, for example, in a glass having a Mohs hardness of greater than 5, for example, a Mohs hardness of 5 to 7, the wear resistance of the paper guide member itself is improved as shown in a comparative example described later. There is a problem that hurts. Further, when the filler has a Mohs hardness of less than 3, the paper guide member is worn and sufficient wear resistance cannot be obtained.

  Although there is no restriction | limiting in particular as a filler of Mohs hardness 3-5, Wollastonite (Mohs hardness 4.5), calcium carbonate (Mohs hardness 3), boehmite (Mohs hardness 4), aluminum hydroxide (Mohs hardness 3), etc. Is mentioned. Further, the filler is preferably in the form of a fiber from the viewpoint of being difficult to detach and having excellent wear resistance. As the filler, wollastonite is preferable because Mohs' hardness is particularly suitable, mechanical properties such as rigidity, excellent effects of improving wear resistance, and the like are easily obtained.

  These fillers may be used individually by 1 type, and may use 2 or more types together.

  In addition, in the case of wollastonite having a fibrous shape, the size of the filler (C) is 2 to 1,000 μm, preferably 3 to 500 μm, more preferably 3 to 500 μm, as the material form before kneading into the resin. 5 to 150 μm, the average fiber diameter is 1 to 50 μm, preferably 3 to 20 μm, more preferably 5 to 15 μm, and the aspect ratio is usually about 1 to 1,000, preferably 1 to 100, more preferably 1 to 100 μm. 50 are used. The average fiber length and average fiber diameter of wollastonite can be obtained by measuring an image such as a photograph obtained by observation with an electron microscope using image analysis software or the like.

  For example, the fiber diameters of wollastonite manufactured by NYCO, including wollastonite “NYGLOS 8” used in the examples described later are as follows.

In the polyphenylene ether-based resin composition used in the present invention, the blending amount of the (C) filler is 5 to 45 parts by weight, preferably 5 to 40 parts by weight, more preferably 5 parts per 100 parts by weight of the resin component. -35 parts by weight.
(C) If the blending amount of the filler is too small, a sufficient effect of improving the wear resistance cannot be obtained, and if it is too much, the paper is easily damaged.

<(D) Fluororesin>
In the present invention, (D) a fluororesin is blended into the polyphenylene ether-based resin composition together with the above-mentioned (C) filler having a Mohs hardness of 3 to 5. That is, the effect of improving the wear resistance is not sufficient with only the (C) filler, and by using the (C) filler in combination with the (D) fluororesin, sufficient wear resistance with a hardness that does not damage the paper. A paper guide member having the property can be realized.

  The fluororesin includes a fluoroethylene structure such as a difluoroethylene polymer, a tetrafluoroethylene polymer, a tetrafluoroethylene-hexafluoropropylene copolymer, a copolymer of tetrafluoroethylene and an ethylene monomer not containing fluorine. Among them, polymers and copolymers are mentioned. Among them, polytetrafluoroethylene (PTFE) is preferable because it is excellent in lubricity imparting effect and excellent in the effect of suppressing scratching of paper and the effect of improving abrasion resistance. The weight average molecular weight is preferably 50,000 or more, and more preferably 10,000 to 10,000,000.

In the polyphenylene ether-based resin composition used in the present invention, the blending amount of the (D) fluororesin is 2 to 30 parts by weight, preferably 5 to 30 parts by weight, more preferably 100 parts by weight of the resin component described above. 5 to 25 parts by weight.
(D) If the blending amount of the fluororesin is too small, a sufficient effect of improving the wear resistance cannot be obtained, and if it is too much, a good molded product cannot be obtained due to poor dispersion.

  In the present invention, the (D) fluororesin is preferably used in a proportion of 10 to 90% by weight, more preferably 25 to 80% by weight, based on the (C) filler. The total amount of (C) filler and (D) fluororesin relative to 100 parts by weight of the resin component is preferably about 10 to 80 parts by weight, more preferably 15 to 65 parts by weight (C It is preferable to effectively obtain a synergistic effect by the combined use of a filler) and a fluororesin.

<(E) Release agent>
The polyphenylene ether resin composition according to the present invention may contain (E) a release agent for the purpose of improving the release property. (E) As a mold release agent, fatty acid, fatty acid ester, fatty acid metal salt, paraffin wax, polyolefin wax, silicone oil and the like can be used.

  The fatty acid usually includes a fatty acid having 6 to 40 carbon atoms, preferably 10 to 30 carbon atoms, and the fatty acid ester is usually a fatty acid and alcohol having 6 to 40 carbon atoms, preferably 10 to 30 carbon atoms. Examples of the fatty acid metal salt include a fatty acid having 6 to 40 carbon atoms, preferably a fatty acid having 10 to 30 carbon atoms and a metal of Groups I to III of the periodic table, preferably Na, Mg, Examples include fatty acid metal salts with metals selected from Ca, Al, and Zn. Fatty acids, fatty acid esters and fatty acid metal salts having the above carbon number have low volatility and are more likely to exhibit a release effect.

  Specific examples of the fatty acid include caproic acid, capric acid, lauric acid, palmitic acid, stearic acid, behenic acid, lignoceric acid, montanic acid, oleic acid, linoleic acid and the like.

  As the fatty acid in the fatty acid ester, the same fatty acid as the fatty acid can be used. Examples of the alcohol that reacts with the fatty acid to form an ester include saturated or unsaturated monohydric alcohols and saturated or unsaturated polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these alcohols, monovalent or polyvalent saturated alcohols having 30 or less carbon atoms are preferable, and aliphatic saturated monohydric alcohols or polyhydric alcohols having 30 or less carbon atoms are more preferable. Specific examples of these alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, butylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, Dipentaerythritol and the like can be mentioned. These aliphatic esters may contain an aliphatic carboxylic acid and / or alcohol as impurities, and may be a mixture of a plurality of compounds.

  Specific examples of fatty acid esters include mono- and di- (1,2-ethanediol) esters of the above fatty acids, mono- and di- (1,3-butanediol) esters of the above fatty acids, beeswax (myristyl palmitate) ), Stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate, glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate Rate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.

  Specific examples of the fatty acid metal salt include, for example, zinc stearate, calcium stearate, aluminum stearate, sodium stearate, magnesium stearate, zinc oleate, calcium oleate, aluminum oleate, sodium oleate, zinc palmitate, Calcium palmitate, aluminum palmitate, sodium palmitate and the like can be mentioned.

  Among these, fatty acids and fatty acid metal salts (especially stearic acid and montanic acid, and sodium salts, aluminum salts, calcium salts and zinc salts thereof) are preferred, and fatty acid metal salts (especially magnesium of stearic acid or montanic acid). Salts and zinc salts) are more preferred.

Paraffin wax refers to a product obtained by separating and extracting hydrocarbons with good crystallinity from a portion obtained by distillation under reduced pressure of crude oil, and is different from a polyolefin wax described later. Examples of the paraffin wax include saturated aliphatic hydrocarbons such as n-paraffin and / or i-paraffin as main components, or a low molecular weight polyethylene having a hydroxyl group at the terminal and having a waxy appearance. The molecular weight of the paraffin wax measured by gel permeation chromatography method (GPC method) is usually 100 to 10,000, preferably 100 to 5,000, particularly preferably 100 to 3,000. When the molecular weight is less than 100, it tends to evaporate from the vacuum vent during the production of a resin composition such as melt kneading, and it tends to be difficult to exhibit the effect as a release agent. In addition, during molding, wax may bleed out more than necessary, which may cause mold contamination. On the other hand, when the molecular weight exceeds 10,000, it tends to be difficult to bleed out, and the effect as a release agent may be reduced. Paraffin wax can be easily produced by a conventional organic reaction, and a commercially available product can also be used.

The polyolefin-based wax means one synthesized by polymerization of polyolefin or thermal decomposition of polyolefin. Examples of polyolefin waxes include olefin homopolymers and copolymers. Examples of the olefin homopolymer include polyethylene wax, polypropylene wax and the like, partial oxides thereof, and mixtures thereof. Examples of the olefin copolymer include ethylene, propylene, 1-butene, 1-hexene, 1-decene, 2-methylbutene-1, 3-methylbutene-1,3-methylpentene-1, 4-methylpentene-1, and the like. Copolymers such as α-olefins, monomers copolymerizable with these olefins, such as unsaturated carboxylic acids or acid anhydrides thereof (maleic anhydride, (meth) acrylic acid, etc.), (meth) acrylic acid esters And a copolymer with a polymerizable monomer such as (methyl (meth) acrylate, alkyl ester having 1 to 6 carbon atoms of (meth) acrylic acid such as ethyl (meth) acrylate), and the like. Further, these copolymers include random copolymers, block copolymers, or graft copolymers. The olefin copolymer is usually a copolymer of ethylene and at least one monomer selected from other olefins and polymerizable monomers. Of these polyolefin waxes, polyethylene wax is most preferred. The polyolefin wax may have a linear or branched structure.

Examples of silicone oils include those composed of polydimethylsiloxane, and some or all of the methyl groups of polydimethylsiloxane are substituted with phenyl groups, hydrogen atoms, alkyl groups having 2 or more carbon atoms, halogenated phenyl groups, and fluoroester groups. Silicone-modified oil, epoxy-modified silicone oil having an epoxy group, amino-modified silicone oil having an amino group, alcohol-modified silicone oil having an alcoholic hydroxyl group, polyether-modified silicone oil having a polyether structure, and the like. Two or more types may be used in combination.

  One of these (E) release agents may be used alone, or two or more thereof may be mixed and used.

  When the polyphenylene ether-based resin composition according to the present invention contains (E) a release agent, the content thereof is preferably 0.01 to 10 parts by weight with respect to 100 parts by weight of the resin component, and 0.1 to 6 parts by weight. Is more preferable, and 0.1 to 3 parts by weight is still more preferable. By making the blending amount of the release agent more than the above lower limit, the release effect tends to be further improved, and by making it less than the above upper limit, mechanical properties are deteriorated, gas at the time of molding, generation of mold deposit This is preferable because it tends to be suppressed.

<(F) Stabilizer>
The polyphenylene ether-based resin composition according to the present invention includes a hindered phenolic compound and a phosphorus-based compound for the purpose of improving the thermal stability at the time of melt kneading and use in a high temperature atmosphere in the production and molding process of the composition. It is preferable to blend at least one (F) stabilizer selected from zinc oxide.

  Specific examples of the hindered phenol compound include n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,6-hexanediol-bis [3- (3,5- Di-tert-butyl-4-hydroxyphenyl) propionate], pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 3,9-bis [1,1-dimethyl -2- {β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl] -2,4,8,10-tetraoxaspiro [5,5] undecane, triethylene glycol- Bis [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], 3,5-di tert-butyl-4-hydroxybenzylphosphonate-diethyl ester, 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, 2,2- Thio-diethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], tris- (3,5-di-tert-butyl-4-hydroxybenzyl) -isocyanurate, N, N'-hexamethylene bis (3,5-di-tert-butyl-4-hydroxy-hydrocinnamamide) and the like. Among these, n-octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, 1,6-hexanediol-bis [3- (3,5-tert-butyl-4 -Hydroxyphenyl) propionate], 3,9-bis [1,1-dimethyl-2- {β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy} ethyl] -2,4, 8,10-tetraoxaspiro [5,5] undecane is preferred.

  As the phosphorus compound, for example, a phosphonite compound or a phosphite compound is preferably used.

  Examples of the phosphonite compound include tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite, tetrakis (2,5-di-tert-butylphenyl) -4,4′-. Biphenylene diphosphonite, tetrakis (2,3,4-trimethylphenyl) -4,4'-biphenylene diphosphonite, tetrakis (2,3-dimethyl-5-ethylphenyl) -4,4'-biphenylene diphosphonite Tetrakis (2,6-di-tert-butyl-5-ethylphenyl) -4,4'-biphenylenediphosphonite, tetrakis (2,3,4-tributylphenyl) -4,4'-biphenylenediphosphonite Tetrakis (2,4,6-tri-tert-butylphenyl) -4,4′-biphenylenediphosphonite and the like. Among them, tetrakis (2,4-di-tert-butylphenyl) -4,4′-biphenylenediphosphonite is preferable.

  Examples of the phosphite compound include tris (2,4-di-tert-butylphenyl) phosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, and bis (2,6-diphenyl). -Tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, 4,4'-butylidene-bis- (3-methyl -6-tert-butylphenylditridecyl) phosphite, 1,1,3-tris (2-methyl-4-ditridecylphosphite-5-tert-butylphenyl) butane, tris (mixed mono and dinonylphenyl) ) Phosphite, Tris (nonylphenyl) phosphite, 4,4′-isopropylide Bis (phenyl-dialkyl phosphite) and the like, tris (2,4-di-tert-butylphenyl) phosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite, Bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol-di-phosphite is preferred.

  Zinc oxide preferably has an average particle size of 0.02 to 1 μm, more preferably 0.08 to 0.8 μm, and an average particle size of 0.2 to 0.5 μm. Further preferred.

  Among these stabilizers, zinc oxide is preferable because mold deposits hardly occur and discoloration hardly occurs.

  (F) A stabilizer may use only 1 type or may use 2 or more types together.

  (F) The compounding quantity of a stabilizer is 0.01-5 weight part normally with respect to 100 weight part of resin components, Preferably it is 0.02-3 weight part, More preferably, it is 0.05-2 weight. Part. (F) If the blending amount of the stabilizer is not less than the above lower limit, the effect of the stabilizer tends to be more easily exhibited.

<(G) Colorant>
You may mix | blend (G) a coloring agent with the polyphenylene ether-type resin composition which concerns on this invention.
Examples of the colorant include dyes, inorganic pigments, and organic pigments generally used for thermoplastic resins.

Examples of the dye include azo dyes, anthraquinone dyes, phthalocyanine dyes, indigo dyes, diphenylmethane dyes, acridine dyes, cyanine dyes, nitro dyes, and nigrosine.
Inorganic pigments include oxide pigments such as titanium oxide, red pepper and cobalt blue, hydroxide pigments such as alumina white, sulfide pigments such as zinc sulfide and cadmium yellow, silicate pigments such as white carbon and talc, and carbon black. Etc.
Examples of organic pigments include nitro pigments, azo pigments, phthalocyanine pigments, and condensed polycyclic pigments. Among these, an inorganic pigment is preferable because it is difficult to bleed out to the surface of the molded product.

  In particular, in applications as a paper guide member, it is often colored black, and therefore carbon black is often blended.

  (G) For the purpose of improving the handleability during extrusion, the colorant may be used as a master batch with a thermoplastic resin such as a polyphenylene ether resin, a polystyrene resin, a polycarbonate resin, or an acrylic resin. .

  When blending the (G) colorant in the polyphenylene ether-based resin composition according to the present invention, the blending amount of the (G) colorant is preferably 0.01 to 20 parts by weight with respect to 100 parts by weight of the resin component. 0.01 to 15 parts by weight is more preferable.

<Other ingredients>
In the polyphenylene ether resin composition according to the present invention, a flame retardant can be used as an optional component.
Preferable flame retardants include phosphate ester compounds.

The phosphate ester compound is a phosphorus compound containing pentavalent phosphorus in the molecule, and two or more kinds of compounds can be used in combination. Specific examples include phenyl resorcin polyphosphate, cresyl resorcin polyphosphate, phenyl cresyl resorcin polyphosphate, xylyl resorcin polyphosphate, phenyl-p-tert-butylphenyl resorcin polyphosphate, phenyl・ Condensed phosphate ester compounds such as isopropylphenyl, resorcinol, polyphosphate, cresyl, xyler, resorcinol, polyphosphate, phenyl, isopropylphenyl, diisopropylphenyl, resorcinol, polyphosphate, bisphenol A-bis (diphenylphosphate), triphosphate Phenyl, tricresyl phosphate, diphenyl-2-ethylcresyl phosphate, tri (isopropylphenyl) phosphate, tributyl phosphate, phosphorus Orthophosphoric acid ester compound of diphenyl cresyl like, methylphosphonic acid diphenyl ester, diethyl ester, and the like phenylphosphonic acid. These compounds can be produced from phosphorus oxychloride and the like by a known method.
These flame retardants may be used alone or in combination of two or more.

  When a flame retardant is blended in the polyphenylene ether-based resin composition according to the present invention, the blending amount of the flame retardant is usually 1 to 30 parts by weight, preferably 5 to 25 parts by weight with respect to 100 parts by weight of the resin component. . By making the blending amount of the flame retardant more than the above lower limit, the flame retardant effect tends to be exhibited, and by making it the above upper limit or less, it tends to suppress the decrease in load deflection temperature and mechanical strength, which is preferable. .

  The polyphenylene ether resin composition according to the present invention can further contain a thermoplastic elastomer as an optional component. Examples of the thermoplastic elastomer used in the present invention include conjugated diene rubbers such as butadiene rubber and isoprene rubber, polyolefin elastomers, polyamide elastomers, polyester elastomers, urethane elastomers, silicon elastomers, fluorine elastomers, and core-shell type elastomers. Is mentioned. These may be used alone or in combination of two or more.

  When the thermoplastic elastomer is blended with the polyphenylene ether resin composition according to the present invention, the blending amount of the thermoplastic elastomer is usually 1 to 30 parts by weight, preferably 5 to 25 parts per 100 parts by weight of the resin component. Parts by weight. By making the blending amount of the thermoplastic elastomer more than the above lower limit, the effect of improving the impact strength is more easily exhibited, and by making it the upper limit or less, it tends to suppress the decrease in load deflection temperature and rigidity.

  Further, the polyphenylene ether-based resin composition according to the present invention includes a weather resistance improver, an antistatic agent, an antifogging agent, a lubricant, an antiblocking agent, a fluidity improving agent, a plasticizer, a dispersant, an antibacterial agent, and the like. Various resin additives may be blended.

<Manufacturing method>
The method for producing the polyphenylene ether-based resin composition according to the present invention is not particularly limited, but is preferably by melt-kneading, and a kneading method generally used for thermoplastic resins can be applied. Examples of the production method include, for example, the above (A) polyphenylene ether resin, (B) styrene resin, (C) filler, (D) fluororesin, and (E) mold release agent, if necessary, (F ) Stabilizer, (G) Other ingredients such as colorant are uniformly mixed with a Henschel mixer, ribbon blender, V-type blender, etc., then uniaxial or multi-axial kneading extruder, roll, Banbury mixer, lab plast mill Lavender) and the like, and after batch melting and kneading, extruding from a die, cooling and pelletizing, (A) polyphenylene ether resin and (B) styrene resin resin components upstream of the kneading machine, (D) Feed other components such as fluororesin, (E) mold release agent and (F) stabilizer, (G) colorant as required, and (C) filler and difficult as needed from midstream Flame retardant Feeds, was melt-kneaded, extruded through a die, and a method of pelletizing after cooling.

  The kneading temperature and kneading time can be arbitrarily selected depending on conditions such as the type of the resin composition and the kneader, but the kneading temperature is usually 200 to 350 ° C., preferably 220 to 320 ° C., and the kneading time is 10 Minutes or less are preferred. If the kneading time exceeds 350 ° C. or the kneading time exceeds 10 minutes, thermal deterioration of the polyphenylene ether resin or styrene resin becomes a problem, and the physical properties of the molded product may be deteriorated or the appearance may be deteriorated.

[Molding method]
As a molding method of the polyphenylene ether-based resin composition of the present invention, a molding method generally used for thermoplastic resins, that is, injection molding, injection compression molding, extrusion molding, sheet molding, thermoforming, rotational molding, laminate molding, Various molding methods such as press molding may be mentioned, and a preferred molding method is an injection molding method.

[Paper guide member]
The polyphenylene ether-based resin composition of the present invention is useful as a molding material for various members, but is particularly useful as a molding material for producing a paper guide member by integral molding by injection molding. However, the application member of the polyphenylene ether-based resin composition of the present invention is not limited to a paper guide member.

  A paper guide member formed by molding the polyphenylene ether-based resin composition of the present invention (hereinafter referred to as “the paper guide member of the present invention”) includes, for example, a main body portion extending in a direction crossing the paper conveyance direction, And a plurality of convex portions arranged in parallel at intervals in the extending direction of the main body portion, so that paper slides on the convex portion. The paper guide member to be guided, and specific shapes thereof include those shown in FIGS. 1 and 2, but are not limited thereto.

  Note that the height of the convex portion of the paper guide member is not particularly limited, but the protruding height from the main body portion is usually formed to be about 0.5 to 20 mm.

[Printing and recording device]
The printing recording apparatus of the present invention comprises a member obtained by injection molding the above-described polyphenylene ether-based resin composition of the present invention, particularly a paper guide member of the present invention, and various printers such as an ink jet printer and a laser printer. It can be applied to any printing recording apparatus equipped with a paper guide member for transporting printing recording paper, such as copiers, other printing recording apparatuses, image scanners, facsimiles, and multifunction machines, registers, ticket vending machines, etc. The installation location of the paper guide member is not particularly limited, and can be applied to any paper conveyance site such as a paper feeding unit, a printing unit, and a paper ejection unit.

  Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to the following examples unless it exceeds the gist.

[raw materials]
Polyphenylene ether resin; poly (2,6-dimethyl-1,4-phenylene ether), manufactured by Mitsubishi Engineering Plastics Co., Ltd. (30 ° C., intrinsic viscosity measured in chloroform is 0.40 dl / g) (hereinafter referred to as “PPE ”For short)
Rubber-modified polystyrene; manufactured by PS Japan, trade name “PSJ polystyrene HT478” (hereinafter abbreviated as “HIPS”)
Polystyrene; manufactured by PS Japan, trade name “PSJ polystyrene HF77” (hereinafter abbreviated as “GPPS”)
Wollastonite: manufactured by NYCO, trade name “NYGLOS 8”
Talc: Product name "TP-325A" manufactured by Fuji Talc
Carbon fiber: Mitsubishi Rayon Co., Ltd., trade name “TR06U B4E”
Glass beads: Potters Barodini, trade name “ECB731”
Polytetrafluoroethylene: Daikin Industries, Ltd., trade name “Lublon L5F” (hereinafter abbreviated as “PTFE”)
Zinc oxide (stabilizer): Made by Honjo Chemical Co., Ltd., trade name “Zinc oxide 2 types”
Magnesium stearate (release agent): Nitto Kasei Kogyo Co., Ltd., trade name “Mg-St”
Carbon black (colorant): manufactured by Resino Color Industry Co., Ltd., trade name “BLACK-SBF M8800”, masterbatch with carbon black content of 45% by weight (hereinafter abbreviated as “BLACK-SBF”)

[Method for Producing Resin Composition]
The raw materials are weighed so that the ratio shown in Table 2 is obtained, mixed uniformly with a tumbler mixer, and then melt kneaded at a cylinder temperature of 280 ° C. and a screw rotation speed of 120 rpm with a twin screw extruder (Ikegai, PCM30 type). And then pelletized to produce a resin composition.

[Evaluation method]
(1) Measurement of specific wear amount After the resin composition pellets obtained by the above method were dried at 100 ° C. for 3 hours, the ring-type test piece was molded at a molding temperature of 280 ° C. with a PS40 type injection molding machine manufactured by Nissei Plastic Industry. Molding was performed under conditions of a mold temperature of 80 ° C., an injection pressure of 80 MPa, and a molding cycle of 40 seconds, and measurement was performed using a thrust type wear tester under the following conditions.
Surface pressure: 0.085 MPa
Linear velocity: 400mm / sec
Traveling time: 1 hour Counterpart: Fuji Xerox, print recording paper “XEROX-P”

(2) Paper condition The condition of the paper after the test in (1) above was observed, and the paper with no flaws was marked with ◯, the paper with slight flaws was marked with Δ, and the torn paper was marked with x.

[Evaluation results]

  From the above results, it can be seen that the member made of the polyphenylene ether-based resin composition of the present invention has excellent wear resistance to the extent that the printed recording paper to be conveyed is not damaged.

1, 2 Paper guide member 1A, 2A Main body part 1B, 2B Convex part 3 Print recording paper

Claims (7)

(A) Filler of 100 parts by weight of a resin component containing 20 to 80% by weight of a polyphenylene ether resin and (B) 80 to 20% by weight of a styrene-based resin. A polyphenylene ether resin composition comprising 5 to 45 parts by weight and (D) 2 to 30 parts by weight of a fluororesin , wherein the filler is wollastonite . Oite to claim 1, the polyphenylene ether-based resin composition, wherein the fluororesin is characterized in that it is a polytetrafluoroethylene. 3. The polyphenylene ether-based resin composition according to claim 1, wherein a ratio of the filler to 100 parts by weight of the resin component is 5 to 40 parts by weight and a ratio of the fluororesin is 5 to 25 parts by weight. object. The polyphenylene ether resin composition according to any one of claims 1 to 3 , wherein the polyphenylene ether resin composition is for the paper guide member described below.
A main body extending in a direction intersecting with the paper transport direction, and a convex portion protruding from the main body,
A plurality of the convex portions are arranged in parallel at intervals in the extending direction of the main body portion,
A paper guide member in which paper is guided by sliding on the convex portion. In any one of claims 1 to 4, polyphenylene ether-based resin composition, wherein the polyphenylene ether-based resin composition is a guide member of a printing recording sheet of the printer. A member obtained by injection molding the polyphenylene ether-based resin composition according to any one of claims 1 to 5 . A printing recording apparatus comprising the member according to claim 6 .

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