JP2002138202A - Cellulose-based powder-containing composite resin molded article and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for suppressing carbonization of a cellulose-based powder, broadening the range of conditions for good molding, and imparting lubricity in a cellulose-based powder-containing composite resin molded article. ,
A high-quality cellulose resin-containing composite resin molded article is provided. SOLUTION: A composite resin molded product is obtained by mixing a polyolefin (A) and a cellulosic powder (B) with A: B = 90 to 2;
A ratio of 0.1 to 10 parts by mass of a lubricant having a melting point that is lower than the molding temperature and contained in a ratio (mass ratio) of 5:10 to 75 and a total amount of 100 parts by mass. Contained in. The above-mentioned lubricant is dispersed in the polyolefin by mixing or kneading during the molding process, and the lubrication is imparted by adhering to the surface or the inside of the cellulosic powder, or both, and the cellulosic powders or the cellulosic powder and The heat generated by shearing with the polyolefin and the frictional heat generated between the cellulose powder and the mold surface can be reduced, and carbonization of the cellulose powder can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellulosic powder-containing composite resin molded product capable of producing a woody feel by removing a resin layer on the surface thereof, and a method for producing the same. In a cellulosic powder-containing composite resin molded article comprising a polyolefin, a lubricant having a lower melting point than the molding temperature is blended and molded, whereby the lubricant is dispersed in the polyolefin,
Smoothness is imparted by adhering to the surface and / or inside of the cellulosic powder, or both, to reduce shearing heat and frictional heat with the mold surface during heat molding, and to suppress carbonization of the cellulosic powder. The present invention relates to a cellulosic powder-containing composite resin molded article and a method for producing the same.

[0002]

2. Description of the Related Art Cellulose powder-containing composite resin molded articles of this kind have been developed in various ways. Particularly, the use of cellulose powder as a filler is a resource for wood chips, wood-based building waste, waste paper and the like. This is an effective way to re-use. In addition, it is economically advantageous to increase the proportion of the cellulose-based powder and reduce the proportion of the polyolefin in the cellulose-based powder-containing composite resin molded body. Is obtained. A cellulose resin-containing composite resin molded product having such a composition is disclosed, for example, in Japanese Patent Publication No. 59-30176.

[0003]

However, since the above-mentioned cellulose-based powder-containing composite resin molded article contains the cellulose-based powder, the cellulose-based powder is kneaded with a screw or the like in a molding machine. Due to shear heat between the powders or between the cellulose powder and the polyolefin, or frictional heat between the cellulose powder and the mold surface, the temperature transmitted to the cellulose powder exceeds the set temperature during molding, and the cellulose powder It is not preferable because carbonization of the body occurs. On the other hand, molding at a low temperature or molding with suppressed kneading tends to increase the difficulty in the case of the composite resin, and molding defects such as cracks are likely to occur, which is not preferable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to suppress the carbonization of a cellulose-based powder in a composite resin molded article containing a cellulose-based powder whose base material resin is composed of polyolefin. In addition, the present invention provides a method for expanding the range of conditions under which the cellulose-based powder-containing composite resin molded article can be satisfactorily molded and provides a method for imparting lubricity, and also provides a high-quality cellulose-based powder-containing composite resin molded article. Is to do.

[0005]

According to the present invention, a polyolefin (A) and a cellulose-based powder (B) are mixed at a ratio of A: B = 90-25: 10-10-75 according to the present invention. (Mass ratio) and their total amount is 100
The lubricant contains 0.1 to 10 parts by mass of a lubricant having a melting point lower than the molding temperature, and the lubricant is dispersed in the polyolefin, and the cellulose powder The present invention provides a cellulose-based powder-containing composite resin molded article, which is attached to the surface, the inside, or both.

Further, according to the present invention, there is also provided a method for producing the above-mentioned cellulose-based powder-containing composite resin molded article. In the first aspect, the present invention relates to a cellulose-based powder having a lower melting point than the molding temperature. After mixing with a lubricant having a lubricant or a polyolefin containing the lubricant, allowing the lubricant to adhere to the surface and / or inside of the cellulosic powder, and then kneading it with the polyolefin and, if necessary, other additives. By molding, the lubricant is dispersed not only in the polyolefin, but also on the surface or inside of the cellulosic powder, or on both, to suppress carbonization of the cellulosic powder during heat molding. And

[0007] A second aspect of the method for producing a cellulosic powder-containing composite resin molded article of the present invention comprises a cellulosic powder,
A lubricant having a melting point lower than the molding temperature or a polyolefin containing the lubricant is kneaded together with the polyolefin and other additives as necessary, and the lubricant is dispersed in the polyolefin and the cellulose-based powder is dispersed. By adhering to the surface or inside, or both, and then molding, the lubricant is dispersed not only in the polyolefin but also on the surface and / or inside of the cellulosic powder, or both, to form the cellulose powder at the time of heat molding. It is characterized in that carbonization is suppressed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have conducted intensive studies on a cellulose resin-containing composite resin molded body in which it is difficult to set molding conditions because of containing a large amount of cellulosic powder. When a lubricant having a relatively low melting point is added, the lubricant is dispersed in the polyolefin by mixing or kneading during the molding process, and adheres to the surface or the inside of the cellulosic powder, or both, to impart lubricity. Completed the present invention by reducing the heat generated by shearing between cellulosic powders or between cellulosic powder and polyolefin and reducing the frictional heat between the cellulosic powder and the mold surface and suppressing carbonization of the cellulosic powder. That is what led to it.

The lubricant may be any lubricant as long as it has a lower melting point than the molding temperature, such as hydrocarbons, alcohols, fatty acids, esters, polyalcohol partial esters, and the like. Examples thereof include metal soaps, natural waxes, fatty acid amides, polymers and the like, and these can be used alone or in combination of two or more. More specifically, liquid paraffin, paraffin wax, synthetic paraffin wax, microcrystal wax, low molecular weight polyethylene, low molecular weight polypropylene, cetyl alcohol, stearyl alcohol, ethylene glycol, polyethylene glycol, polyglycerin, stearic acid, 12-hydroxystearin Acid, complex stearic acid type, ethyl palmitate, butyl stearate, cetyl 2-ethylhexanoate, stearyl stearate, aromatic alcohol ester of fatty acid, hydrogenated castor oil, hydroxystearic acid triglyceride, distearyl epoxy hexahydrophthalate,
Ethylene glycol monostearate, monoglyceride stearate, monoglyceride oleate, zinc 2-ethylhexanoate, calcium ricinoleate, calcium stearate, magnesium stearate, barium stearate, cadmium stearate, lead stearate, lead dibasic stearate , Lithium 12-hydroxystearate, montan wax, montanic acid, montanic acid monoester, montanic acid ethylene glycol ester, montanic acid glycerin triester, montanic acid glycerin triester, montanic acid pentaerythritol tetraester, sodium montanic acid, montanic acid Calcium, montanic acid partially saponified ester wax, carnauba wax, beeswax, ibota wax, lauric amide, palmiti Acid amide, stearic acid amide,
Oleic acid amide, erucic acid amide, behenic acid amide, hydroxystearic acid amide, N-oleyl palmitamide, N-stearyl oleylamide, N-stearyl erucamide, methylene bis stearic acid amide, ethylene bis lauric acid amide, ethylene bis Stearic acid amide, ethylenebisoleic acid amide, dimethylpolysiloxane, methylphenylpolysiloxane,
And polytetrafluoroethylene.

[0010] Among the above lubricants, during the molding process
Of carbonization of cellulosic powder in polyolefins
And the addition of lubricity to cellulosic powders, and even obtained
Consider reduction of mechanical property deterioration in composite resin moldings
Then, a metal soap lubricant, such as (RCOO)_nM (where
R is an alkyl group having 5 to 50 carbon atoms, M is Ca, Mg, Z
n, Cd, Ba, Sr, Pb, Sn, Al, Zr, C
at least one selected from the group consisting of r, Fe and Ni
Represents one or more metals, and n is 1 based on the valence of the metal M.
Is an integer greater than or equal to. Or a higher fatty acid salt represented by
A compound comprising a higher fatty acid salt and a basic metal oxide, or
Alternatively, it is desirable to use these derivatives. Preferably
Is (C₁₇H₃₅COO)_TwoCa, (C₁₇H₃₅COO)_TwoM
g, (C₁₇H ₃₅COO)_TwoZn, mCaO. (C₁₇H₃₅
COO)_TwoCa, mMgO. (C₁₇H₃₅COO)_TwoMg,
mZnO · (C₁₇H₃₅COO)_TwoZn (in each formula, m is
0.01 ≦ m ≦ 5. ) And a few of these derivatives
It is desirable to use at least one kind. In particular,
General formula (RCOO)_nIn a structure represented by M, M = M
g, R = C₁₇H₃₅, N = 2 (C₁₇H₃₅COO)_TwoMg
Or mMgO · (C₁₇H₃₅COO)_TwoMg (where m is
0.05 ≦ m ≦ 2. ) Or its derivatives
Is preferred.

The melting point of the lubricant may be any temperature as long as it is lower than the molding temperature (temperature during mixing or kneading). However, a large amount of the lubricant is dispersed in the polyolefin at the molding temperature, In order to adhere to the surface or inside of the system powder, or both,
A lubricant having a melting point of −90 ° C. or more and −20 ° C. or less from the molding temperature is preferable.

The cellulosic powder may be of any type, such as wood flour, pulp, bacas, kenaf, sawdust, wood fiber, rice hull, crushed chip material, fruit husk powder, waste paper and the like. Can be used alone or in combination of two or more. Among such cellulosic powders, it is particularly preferable to use wood flour, because the molding process is relatively easy and it is generally easily available in the market. The cellulose powder may be of any size, but a cellulose powder having a size of 60 mesh or more and 300 mesh or less is preferable in terms of mechanical properties of the obtained composite resin molded body. .

If the cellulosic powder contains volatile components such as moisture, foaming occurs during molding, and voids are formed in the molded product, which is not preferable. Therefore, if the cellulosic powder contains volatile components such as moisture, it is dried in advance,
It is preferable to adjust so that the volatile component measured at 130 ° C. is 0.5% by mass or less.

The polyolefin may be any polyolefin, such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene,
Polystyrene, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylic acid, polyacrylate, polybutadiene, polyisoprene, polychloroprene, ethylene propylene rubber, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-ethylene propylene rubber Styrene copolymers, ethylene-vinyl acetate copolymers and the like can be mentioned, and these can be used alone or in combination of two or more. Among these polyolefins, polypropylene is preferred because it is particularly inexpensive, has industrial mass productivity, is lightweight and has excellent rigidity, has relatively good heat resistance, and has good moldability. The term “polyolefin” used in the present specification means a broad concept including a polystyrene-based resin. Further, a recycled polyolefin may be used as the polyolefin.

The mixing ratio of the polyolefin (A) and the cellulosic powder (B) is as follows: A: B = 90-25: 10-7
5, preferably 90 to 40:10 to 60 (mass ratio). Further, the blending ratio of the lubricant is based on 100 parts by mass of the total amount of the polyolefin and the cellulose-based powder.
0.1 to 10 parts by mass, preferably 0.1 to 5.0 parts by mass,
The ratio is more preferably 0.1 to 3.0 parts by mass. Here, if the polyolefin content is less than 25:75 in the mixing ratio with the cellulosic powder, the polyolefin will not be able to move around each part of the cellulosic powder, so that the molding of the cellulosic powder-containing composite resin, which has a problem in strength, will occur. It is not preferable because the body is obtained. On the other hand, if the polyolefin is more than 90:10 in the compounding ratio with the cellulosic powder,
To that extent, the amount of the cellulosic powder to be added is reduced, and the woody texture close to nature is extremely impaired, which is not preferable.

If the amount of the lubricant is less than 0.1 part by mass with respect to 100 parts by mass of the total amount of the polyolefin and the cellulosic powder, the lubricant is sufficiently dispersed in the cellulosic powder in the obtained composite resin molded body. Becomes difficult, cellulose-based powders, or cellulose-based powder and polyolefin,
Alternatively, carbonization may be caused by frictional heat generated by kneading the cellulosic powder and the mold. On the other hand, when the amount is more than 10 parts by mass, a cellulose-based powder-containing composite resin molded article having problems in appearance and mechanical properties of a molded product is obtained. Therefore, in a particularly important case, the amount is less than 3.0 parts by mass. Is preferred.

In the present invention, a polyolefin resin modified with an unsaturated carboxylic acid or a derivative thereof for improving the affinity between the cellulose-based powder and the polyolefin may be used, if necessary, in addition to the above-mentioned components. And various additives such as a coloring agent. The unsaturated carboxylic acid may be any, for example, maleic anhydride, itaconic anhydride, citraconic anhydride, maleic acid, itaconic acid, citraconic acid, crotonic acid, isocrotonic acid, mesaconic acid, angelic acid, Sorbic acid, acrylic acid, methacrylic acid and the like can be mentioned, and these can be used alone or in combination of two or more. In addition, as the derivative of the unsaturated carboxylic acid, any may be used, and examples thereof include a metal salt, an amide, an imide, and an ester of the unsaturated carboxylic acid. These may be used alone or in combination of two or more. Can be used.

Any coloring agent may be used, for example, titanium dioxide, cobalt oxide, ultramarine, navy blue, red stalk, silver vermilion, lead white, lead red, graphite, strontium chromate, titanium yellow, titanium black, Zinc chromate, iron black, molybdenum red, molybdenum white, litharge, lithbon, carbon black, emerald green, guinea green, cadmium yellow, cadmium red,
Cobalt blue, azo pigment, phthalocyanine blue, isoindolinone, quinacdrine, dioxazine violet, perinone perylene, etc., can be used alone or in combination of two or more. Other flame retardants, antioxidants, UV absorbers,
Various additives such as an antistatic agent can be added.

The cellulose resin-containing composite resin molded article of the present invention is prepared by adding a lubricant having a lower melting point than the molding temperature, dispersing the lubricant in the polyolefin at the time of molding, It imparts lubricity by attaching to the surface or inside, or both, and reduces shear heat between cellulose powders or between cellulose powder and polyolefin and frictional heat between cellulose powder and the mold surface. It is characterized in that carbonization of the cellulose-based powder is suppressed. Such a composite resin molded product is obtained by mixing a cellulose-based powder and the above-mentioned lubricant or a polyolefin containing a lubricant, allowing the lubricant to adhere to the surface or the inside of the cellulose-based powder, or to both of them. It can be produced by kneading with a polyolefin and, if necessary, other additives, followed by molding. Alternatively, the cellulose-based powder and the lubricant or the polyolefin containing the lubricant may be mixed with the polyolefin and, if necessary, the other. Not only to disperse the lubricant in the polyolefin, but also to adhere it to the surface and / or the inside of the cellulosic powder, and then to mold. As a molding method, various molding methods such as extrusion molding, injection molding, and press molding can be adopted.

The lubricant according to the present invention may be provided on the surface or inside,
Alternatively, any method for producing the cellulosic powder adhered to both may be used. For example, mixing of the cellulosic powder with the lubricant or the polypropylene containing the lubricant using a Henschel mixer, mixing using a kneader, mixing using a ball mill And mixing with a wood flour producing machine. Furthermore, cellulose-based powder, the lubricant, polypropylene and other various additives are mixed, and pellets are produced by pelletizing with an extruder, while the lubricant is carried on the surface, or the lubricant is surface or internal, or A method of producing a cellulosic powder adhered to both of them is exemplified.

For the investigation of the shear heat, for example, a torque rheometer (manufactured by Toyo Seiki Co., Ltd.) or the like is used. Further, the frictional heat with the mold was investigated by measuring the apparent viscosity defined in JIS K7199. The apparent viscosity is a value that includes the true viscosity of the resin, the slip between the resin and the mold surface, the resistance of the resin flow at the mold entrance and exit, and the like. It is possible to obtain a value in which the slip factor between the mold and the mold is relatively large. For the measurement of apparent viscosity, for example,
A capillary rheometer (manufactured by Toyo Seiki Co., Ltd.) is used.

By the above-described production method, composite resin molded articles having various shapes and structures such as plate-shaped molded articles and plate-shaped molded articles having a hollow portion can be produced. Also, the obtained molded product is
By removing the resin layer on the surface, the cellulosic powder is exposed on the surface, so that a woody feel can be created.Furthermore, sashes, frames, and the like can be obtained by performing processing such as grinding, polishing, cutting, and engraving. It can be finished into products such as materials, wall materials, floor materials, louvers, door handles, crescents, handrails, furniture, interior and exterior materials for automobiles, and housings for home appliances.

[0023]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, Comparative Examples, and Test Examples. However, the present invention is not limited to the following Examples.
Unless otherwise specified, “parts” described below indicate “parts by mass”. In the following examples and comparative examples, a twin-screw extruder is used as an extruder, but any of a single-screw extruder, a multi-screw extruder, or a combination thereof may be used. Further, the shape of the screw used in the extruder is not particularly limited.

Example 1 A sample was dried in vacuum at 150 ° C. for 2 minutes and adjusted so that the volatile component measured at 130 ° C. was within 0.3% by mass.
After 100 parts of dry wood flour that passed through 00 mesh and not through 200 mesh and 4 parts of basic magnesium stearate having a melting point of 130 to 150 ° C., the stirring blade of the Henschel mixer was rotated for about 5 minutes. . Further, 100 parts of polypropylene and 1 part of maleic anhydride-modified polypropylene were added and kneaded with a Henschel mixer to obtain a compound. The obtained compound was extruded into a plate having a width of 60 mm and a height of 7 mm using a twin-screw extruder and a mold. The temperature conditions of the extruder were a cylinder temperature of 185 ° C and a mold temperature of 190 ° C. At this time, the resin temperature at the mold was 190 ° C. The formed body was cooled by a cooling mold to maintain the shape. The surface temperature of the molded body immediately after being removed from the cooling mold was 55 ° C. The composite resin molded article according to the present invention was produced by the above method.

Examples 2 to 5 Except that the lubricant was changed to the one shown in Table 1 in Example 1, the same extrusion conditions and operations as in Example 1 were carried out to obtain the composite resin according to the present invention. A molded body was produced.

Examples 6-9 Except that the amount of basic magnesium stearate added in Example 1 was changed to the formulation shown in Table 1, the same extrusion conditions and operation as in Example 1 were carried out to obtain A composite resin molded article according to the invention was produced.

Comparative Example 1 The same extrusion conditions and operation as in Example 1 were carried out except that no lubricant was used.
A composite resin molded body was produced.

Test Example 1 Each of the composite resin moldings obtained in Examples 1 to 9 and Comparative Example 1 was subjected to a torque rheometer (manufactured by Toyo Seiki Co., Ltd.).
The shear heat generation temperature was measured 7.5 minutes after the shearing was started. The measurement result of the obtained shear heating temperature is
Table 1 summarizes the composition of each composite resin molded article. In addition,
Shear heat is heat generated by friction between materials due to shear strain generated during kneading using a screw or the like.

Test Example 2 Each of the composite resin molded articles obtained in Examples 1 to 9 and Comparative Example 1 was subjected to the method of JIS K 7199 (test method for plastic flow characteristics using a capillary rheometer and a slit die rheometer). Shearing speed with a capillary rheometer (manufactured by Toyo Seiki Co., Ltd.)
The apparent viscosity at 216 × 10 ² (/ sec) was measured, and a decrease in friction with the mold surface was relatively estimated. The measurement results of the obtained apparent viscosity are also shown in Table 1. In addition,
Apparent viscosity is the ratio of apparent shear rate to apparent shear stress that does not take into account deviations from Newton flow behavior, with lower apparent viscosity decreasing friction with the mold surface. It is shown that.

[0030]

[Table 1] As shown in Table 1, according to the method of the present invention, stable molding was enabled without carbonizing the cellulosic powder, and sufficient lubricity was imparted.

Example 10 Drying under vacuum at 150 ° C. for 2 minutes was performed so that the volatile component measured at 130 ° C. was within 0.3% by mass.
After 111 parts of dried wood flour that passed through 00 mesh and not through 200 mesh and 12 parts of polypropylene containing about 10 wt% of basic magnesium stearate having a melting point of 130 to 150 ° C., a Henschel mixer was added for about 5 minutes. Was rotated. Further, 100 parts of polypropylene and maleic anhydride-modified polypropylene 1
And kneaded with a Henschel mixer to obtain a compound. The obtained compound was extruded into a plate having a width of 60 mm and a height of 7 mm using a twin-screw extruder and a mold. The temperature conditions of the extruder are cylinder temperature 185 ° C,
The mold temperature was 190 ° C. At this time, the resin temperature at the mold was 190 ° C. The formed body was cooled by a cooling mold to maintain the shape. The surface temperature of the molded body immediately after being removed from the cooling mold was 55 ° C.

Example 11: Vacuum dried at 150 ° C. for 2 minutes, and adjusted so that the volatile component measured at 130 ° C. was within 0.3% by mass.
111 parts of dried wood flour which passed through 00 mesh but not through 200 mesh, 12 parts of polypropylene containing about 10 wt% of basic magnesium stearate having a melting point of 130 to 150 ° C., further 100 parts of polypropylene and maleic anhydride One part of the modified polypropylene was added and kneaded with a Henschel mixer to obtain a compound. The obtained compound is subjected to a width of 6 using a twin-screw extruder and a mold.
It was extruded into a plate having a thickness of 0 mm and a height of 7 mm. The temperature conditions of the extruder were as follows: cylinder temperature 185 ° C, mold temperature 19
0 ° C. At this time, the resin temperature at the mold was 190 ° C. The formed body was cooled by a cooling mold to maintain the shape. The surface temperature of the molded body immediately after being removed from the cooling mold was 55 ° C.

Example 12 The composition was dried under vacuum at 150 ° C. for 2 minutes and adjusted so that the volatile component measured at 130 ° C. was within 0.3% by mass.
After 100 parts of dry wood flour that passed through 00 mesh and not through 200 mesh and 1 part of basic magnesium stearate having a melting point of 130 to 150 ° C., the stirring blade of the Henschel mixer was rotated for about 5 minutes. . Further, 100 parts of polypropylene and 1 part of maleic anhydride-modified polypropylene were added and kneaded with a Henschel mixer to obtain a compound. The obtained compound was extruded into a plate having a width of 60 mm and a height of 7 mm using a twin-screw extruder and a mold. The temperature conditions of the extruder were a cylinder temperature of 185 ° C. and a mold temperature of 185 ° C. At this time, the resin temperature at the mold was 190 ° C. The molded body molded at 190 ° C. was cooled by a cooling mold, and the shape was maintained. The surface temperature of the compact immediately after being removed from the cooling mold is 55
° C. The skin layer of the obtained extruded product was removed by grinding, and sanding was performed partially in a streak shape. By this processing, the streak pattern obtained by partially sanding in a streak shape was clearly observed visually, and had a woodgrain-like pattern. By the above method, a composite resin molded article having a grain pattern according to the present invention was produced.

[0034]

As described above, the method for producing a cellulose resin-containing composite resin molded article of the present invention uses a lubricant having a melting point lower than the molding temperature, and is not limited to dispersion in polyolefin. Surface or inside of the system powder,
Or, to impart lubricity by adhering a lubricant to both of them, shear heating between cellulose powders or cellulose powder and polyolefin during heat molding,
The frictional heat between the cellulose-based powder and the mold surface can be reduced, carbonization of the cellulose-based powder can be suppressed, and an extremely high-quality cellulose resin-containing composite resin molded article can be manufactured. Conventional cellulose-based powder-containing composite resin molded articles are, for example, when kneaded with a screw or the like at the time of molding, carbonization of the cellulose-based powder is a concern. And molding conditions were difficult to set. However, the composite resin molded article of the present invention is advantageous in that even if it contains a cellulosic powder, it has excellent moldability. Further, according to the method of the present invention,
A Teflon (registered trademark) coating of the mold is not required, the production can be performed with good productivity and at low cost, and a grain-like pattern can be easily imparted by a simple surface treatment such as sanding.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08L 23/12 C08L 23/12 97/02 97/02 // B29K 23:00 B29K 23:00 711: 14 711: 14 F term (reference) 4F071 AA12 AA13 AA15 AA20 AA22 AA24 AA25 AA28 AA32 AA33 AA73 AC02 AC05 AC09 AC10 AC12 AE11 AG34 BB05 BC07 4F201 AA01 AA03 AA11 AB07 AB20 AC04 AD06 AG13 AP17 BC20 BC02 4J002 AC03W AC06W AC09W AE03Y AE05Y AH00X BB03W BB03Y BB06W BB12W BB12Y BB15W BC03W BD04W BD10W BD15Y BF02W BF03W BG01W BG04W BN06W BN15W CH02Y CP03E26 EF0 EG0 076 EF016 EG016 EC056

Claims (11)

[Claims] 1. A polyolefin (A) and a cellulosic powder (B) are contained in a ratio (mass ratio) of A: B = 90-25: 10-75, and the total amount thereof is 100 parts by mass. On the other hand, a lubricant having a melting point lower than the molding temperature is contained in a ratio of 0.1 to 10 parts by mass, and the lubricant is dispersed in the polyolefin, and the surface of the cellulosic powder or A cellulosic powder-containing composite resin molded article which is adhered to the inside or both of them. 2. A polyolefin (A) and a cellulose-based powder (B) are contained in a ratio (mass ratio) of A: B = 90 to 40:10 to 60, and the total amount thereof is 100 parts by mass. The cellulose-based powder-containing composite resin according to claim 1, wherein a lubricant having a lower melting point than the molding temperature is contained in a proportion of 0.1 to 3.0 parts by mass. Molded body. 3. The cellulosic powder is at least one selected from the group consisting of wood flour, pulp, bacas, sawdust, wood fiber, paddy, crushed chip material, fruit husk powder and waste paper. The cellulosic powder-containing composite resin molded product according to claim 1 or 2. 4. The composite resin molded article containing a cellulose powder according to claim 1, wherein the cellulose powder is wood flour. 5. The at least one polyolefin selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylic acid, polyacrylate, polybutadiene, polyisoprene and polychloroprene. The composite resin molded article containing a cellulose-based powder according to any one of claims 1 to 4, wherein the molded article is a single resin. 6. The cellulosic powder-containing composite resin molded article according to claim 1, wherein the polyolefin is polypropylene. 7. The method according to claim 1, wherein the lubricant is at least one selected from the group consisting of hydrocarbons, alcohols, fatty acids, esters, polyhydric alcohol partial esters, metal soaps, natural waxes, fatty acid amides, and polymers. The cellulosic powder-containing composite resin molded product according to any one of claims 1 to 6, characterized in that: 8. The method according to claim 8, wherein the metal soap is (RCOO) _n M ( _where R
Is an alkyl group having 5 to 50 carbon atoms, M is Ca, Mg, Z
n, Cd, Ba, Sr, Pb, Sn, Al, Zr, C
at least one selected from the group consisting of r, Fe and Ni
Represents one or more metals, and n is 1 based on the valence of the metal M.
Is an integer greater than or equal to. 8. The method according to claim 7, wherein the higher fatty acid salt is a compound comprising the higher fatty acid salt and a basic metal oxide, or a derivative thereof.
2. The composite resin molded article containing a cellulose powder according to item 1. 9. A cellulose powder and a lubricant having a melting point lower than the molding temperature or a polyolefin containing the lubricant are mixed, and the lubricant is added to the surface or the inside of the cellulose powder or to both of them. After adhering, and then kneading this with a polyolefin and other additives as necessary, by molding, the lubricant is dispersed not only in the polyolefin but also on the surface or inside of the cellulosic powder, or both. A method for producing a cellulosic powder-containing composite resin molded article, characterized in that carbonization of the cellulosic powder during heat molding is suppressed. 10. A cellulose powder and a lubricant having a lower melting point than a molding temperature or a polyolefin containing the lubricant are kneaded with a polyolefin and, if necessary, other additives, and the lubricant is polyolefin. The lubricant is dispersed not only in the polyolefin but also in the surface or the interior of the cellulosic powder, or both, by dispersing the lubricant in and / or adhering to the surface or the inside of the cellulosic powder or both. Let
A method for producing a cellulosic powder-containing composite resin molded body, wherein carbonization of cellulosic powder during heat molding is suppressed. 11. The method according to claim 1, further comprising, prior to the mixing step or the kneading step, a step of drying the cellulose-based powder so that the volatile component measured at 130 ° C. is 0.5% by mass or less. Item 10. The method for producing a cellulosic powder-containing composite resin molded product according to item 9 or 10.