JPH07165225A - Molding with luster and production thereof - Google Patents

Abstract

PURPOSE:To form a vessel which has luster with arbitrary distorted patterns, by using a specified resin compound and controlling the orientation of dispersed particles having a specified nearly bar-shaped form. CONSTITUTION:A resin compound which consists of thermoplastic polyester resin (A) of 98-50 pts.wt. and thermoplastic resin (B) of 2-50 pts.wt. incompatible with resin (A) and has a larger difference in refractive index than 0.05 between the resins (A), (B) in the non-orientation state at 25 deg.C, is molded by injection or extrusion to obtain preliminary moldings in which bar-shaped resin (b) are arranged in the flowing direction of the resin compound. Next, when the preliminary molding is processed with blow molding, temperature distribution is give at an arbitrary position or other ways are applied to change the oriented direction of the resin (b), which is a bar-shaped dispersion phase in the matrix resin (a), to optional directions. In this way, an optional pattern can be displayed without making the face of a molding uneven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to cosmetics, shampoos, conditioners, foods, beverages, which require particularly excellent appearance.
Useful as a container such as a bottle for storing medicines, detergents, etc.
TECHNICAL FIELD The present invention relates to a molded article having gloss accompanied by a gloss distortion pattern and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, various methods have been used for imparting an excellent appearance such as a high-class appearance to a molded article such as a container. Generally, a method of adding a pearl pigment using mica or the like to a thermoplastic resin is performed, and a resin having such a pearl pigment added is melt-molded to obtain a pearl-like molded product. Has been.

However, in the method of adding the pearl pigment, the only way to change the appearance of the molded article is to adjust the particle size and the amount of the pearl pigment added, and the appearance of the molded article is changed. There is a limit to this, and there has been a demand for a molded product having an excellent appearance that is more varied in terms of decoration.

Therefore, a molded product having a change in appearance has been proposed by utilizing a resin composition in which resins which are incompatible with each other are combined. For example, Japanese Patent Publication No. 61-39336
Japanese Unexamined Patent Publication (Kokai) No. JP-A-H09 (1994) -242242 discloses a container molded using a resin composition comprising 10 to 99% by weight of a polyester resin and 1 to 90% by weight of a polyolefin resin, the thin portion of which is oriented in at least one direction. Is proposed.
Further, JP-B-61-24253 discloses that a polyester resin 99.5 to 90% by weight and a methacrylic resin 0.5.
A plastic cosmetic bottle obtained by stretch-blow molding a resin mixture consisting of 10 wt% has been proposed.

However, a molded article molded by a usual method using a resin composition prepared by blending the above-mentioned mutually incompatible resins has a beautiful appearance but is appealing to give a high-class feeling. Only the texture derived from the resin composition, that is, the metallic luster, the luster having a fine texture and softness, etc., and the appearance has not been changed such as imparting a gloss distortion pattern. Further, in order to give a pattern as a decoration to the molded body, the molded body is made uneven by embossing or the like, or a coloring agent is added, or the container is subjected to printing, decoration such as hot stamping. Since it was only due to secondary processing such as the above, and it did not take advantage of the luster of the material of the container, it did not lead to a remarkable change in appearance such as imparting a gloss distortion pattern.

Further, Japanese Patent Laid-Open No. 163363/1993 discloses a molded product molded from a resin composition prepared by blending resins that are incompatible with each other, and the molded product has a partial degree of molecular orientation in the matrix phase. A molded article having the above differences is proposed. However, the molded article simply forms a transparent portion and an opaque portion in the molded article, and further improves the high-class appearance of the molded article. Therefore, the appearance was not changed by adding a glossy distortion pattern.

Furthermore, the applicant of the present application has proposed a molded product molded from a resin composition prepared by blending resins that are incompatible with each other, wherein the dispersed phase is oriented in a specific direction and has gloss. However, the gloss of the molded article is unitary, and the appearance is not changed by imparting a glossy distortion pattern, so that the high-grade feeling and the like are not improved.

Therefore, a first object of the present invention is to provide a molded article such as a container having a gloss accompanied by a gloss distortion pattern and giving a high-grade feeling. A second object of the present invention is to provide a method for producing a molded product that can control the gloss strength of the resulting molded product and develop an arbitrary gloss distortion pattern.

[0009]

Means for Solving the Problems As a result of intensive studies, the present inventors have used a specific resin composition to obtain a specific internal structure obtained by controlling the orientation direction of dispersed particles having a specific substantially rod shape. It was found that a molded product having the above-mentioned object can achieve the above object, and that the above object can be achieved by giving a temperature distribution to the preformed product before the blow molding.

The present invention has been made on the basis of the above-mentioned findings. 98 to 50 parts by weight of a thermoplastic polyester resin (A) and a thermoplastic resin (B) 2 which is incompatible with the thermoplastic polyester resin (A) are used. A resin composition composed of 50 parts by weight and having a difference in refractive index between the thermoplastic polyester resin (A) and the thermoplastic resin (B) in the non-oriented state at 25 ° C. of more than 0.05 is injected or extrusion molded. And a thermoplastic resin (B) in the matrix of the thermoplastic polyester resin (A), which is obtained by blow-molding the preliminary molded product. A molded product obtained by orienting and dispersing in the flow direction of the resin composition at the time of molding the preformed product, wherein the orientation direction of the thermoplastic resin (B) is partially changed to an arbitrary direction. Characterized by And it provides a molded article having a gloss of.

The present invention also provides the following production methods (1) and (2) as a preferable production method of the molded article of the present invention.

(1) Thermoplastic polyester resin (A) 9
8 to 50 parts by weight and the thermoplastic polyester resin (A)
And a thermoplastic resin (B) incompatible with 2 to 50 parts by weight, and the difference in refractive index between the thermoplastic polyester resin (A) and the thermoplastic resin (B) in the non-oriented state at 25 ° C. is 0. A method for producing a molded body, comprising molding a preformed body by injection or extrusion molding of a resin composition exceeding 0.05, and then blow molding the preformed body. A method for producing a glossy molded article, which comprises contacting a surface of the pre-molded article with a jig whose temperature is controlled to be lower than the surface temperature to give a temperature distribution, and then blow molding.

(2) Further, in the present invention, 98 to 50 parts by weight of the thermoplastic polyester resin (A) and the thermoplastic resin (B) 2 which is incompatible with the thermoplastic polyester resin (A) 2
To 50 parts by weight, and a resin composition in which the difference in refractive index between the thermoplastic polyester resin (A) and the thermoplastic resin (B) in the non-oriented state at 25 ° C. exceeds 0.05 is injected or extruded. A method for producing a molded body, which comprises molding to form a preformed body and then blow molding the preformed body,
It is intended to provide a method for producing a molded article having a gloss, wherein the preformed article has a wall thickness difference at any one or at least two portions.

The glossy molded article of the present invention will be described in detail below. As the thermoplastic polyester resin (A) (hereinafter referred to as “resin (A)”) used as one component of the resin composition in the present invention, a polyester resin whose main repeating unit is ethylene terephthalate is preferable, and a commercially available product is used. It can also be used. Specific examples thereof include polyethylene terephthalate, copolyesters of terephthalic acid, isophthalic acid and ethylene glycol, copolyesters of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol, terephthalic acid, isophthalic acid and ethylene glycol. Examples thereof include ethylene terephthalate-containing polymers such as copolyesters with propylene glycol.

Further, the above-mentioned ethylene terephthalate-containing polymer contains dicarboxylic acids such as succinic acid, adipic acid, azelaic acid, sebacic acid, dodecanoic acid, p-oxybenzoic acid and naphthalenedicarboxylic acid as copolymerization components, diethylene glycol, One or more glycol components such as propylene glycol, polyethylene glycol, polytetramethylene glycol and naphthalene diol may be copolymerized in the polymer in an amount of 10% by weight or less.

The resin (A) preferably has an intrinsic viscosity within the range of 0.65 to 1.40, more preferably 0.7 to 1.20, and most preferably 0.75.
Is about 1.20. If the above-mentioned intrinsic viscosity is less than 0.65, the impact resistance of the container is significantly impaired when a molded product is formed, or the drawdown becomes severe when the preformed product is molded by extrusion blow molding. However, if it exceeds 1.40, injection blow molding or the like may become very difficult. Therefore, it is preferable that the content be within the above range.

The weight average molecular weight of the resin (A) is preferably 10,000 to 1,000,000.

As the thermoplastic resin (B) (hereinafter referred to as "resin (B)") which is not compatible with the resin (A) used as another component of the resin composition in the present invention, a polyolefin resin, At least one resin selected from the group consisting of poly (meth) acrylic resins can be mentioned. Specific examples thereof include the following polymers, which can be used alone or in combination of two or more. Moreover, a commercial item can also be used.

Examples of the polyolefin resin include high density polyethylene, low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-propylene-butadiene copolymer, ethylene-vinyl acetate copolymer, poly-4-methyl- 1-pentene, ethylene-methacrylic acid copolymer and its alkali metal salt, acid-modified polyethylene modified with maleic anhydride, acid-modified polypropylene, acid-modified ethylene-vinyl acetate copolymer, glycidyl methacrylate, etc. were copolymerized. Olefin resin such as epoxy-modified polyethylene. Further, as the poly (meth) acrylic resin, methyl methacrylate, methyl acrylate, (hereinafter, both are collectively referred to as
(Meth) acrylate), lower alkyl (meth) acrylates such as ethyl (meth) acrylate, butyl (meth) acrylate, homopolymers such as (meth) acrylonitrile or copolymerized (meth) acrylates obtained by copolymerizing these. (Meth) acrylic acid ester copolymers and the like.

Any of the polymers specifically listed as the above resin (B) can exhibit gloss accompanied by a gloss distortion pattern when combined with the above resin (A). Among them, polymethylmethacrylate, polyethylene, polypropylene , Ethylene-vinyl acetate copolymer is particularly preferable for forming a substantially rod-shaped structure.

The weight average molecular weight of the resin (B) is preferably 10,000 to 1,000,000.

In the present invention, the blending ratio of the resin (A) and the resin (B) in the resin composition is in the range of 98 to 50 parts by weight of the resin (A), the resin (B).
Is required to be blended in the range of 2 to 50 parts by weight, preferably the resin (A) is in the range of 95 to 60 parts by weight, the resin (B) is in the range of 5 to 40 parts by weight, and Preferably, the resin (A) is in the range of 90 to 70 parts by weight, and the resin (B) is in the range of 10 to 30 parts by weight. When it is out of the above range, not only a molded article having a desired gloss distortion pattern cannot be obtained, but also sufficient gloss is not exhibited.

Further, in the above resin composition, the difference in refractive index between the resin (A) and the resin (B) in the non-oriented state at 25 ° C. needs to be more than 0.05, and preferably. A combination of 0.06 or more is desirable. Further, it is preferable that the resin (A) and the resin (B) have a higher refractive index of (A). This difference in refractive index is 0.
When it is 05 or less, not only a molded product having a desired gloss distortion pattern cannot be obtained, but also the gloss itself becomes weak, which is not preferable. As the resin (A) and the resin (B) which are particularly preferably combined to satisfy the above difference in refractive index, polyethylene terephthalate as the resin (A), a copolymer of terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol can be used. Examples thereof include polymerized polyester, and examples of the resin (B) include polymethylmethacrylate, polyethylene, polypropylene, and ethylene-vinyl acetate copolymer.

In the present invention, additives such as colorants such as pigments and dyes, antistatic agents, mold release agents, nucleating agents, etc. are added to the above resin composition within a range that does not impair the gloss accompanied by gloss distortion pattern. It is also possible to add the compound to the phase of the resin (A) as a matrix or the phase of the resin (B) as a dispersed phase.

Thus, the molded product of the present invention is obtained by injection molding or extrusion molding of the above resin composition to form a preformed product, and then blow molding the preformed product. A) the resin (B) having a substantially rod-like shape and oriented in the flow direction of the resin composition at the time of molding of the preformed body in the matrix of
The orientation direction of the resin (B) is a molded body that is partially changed to an arbitrary direction.

The above-mentioned injection or extrusion molding can be carried out by a known method without particular limitation.
A method in which the above resin composition is kneaded in advance and supplied to a molding machine, or a dry blended resin composition is directly supplied to a molding machine and molded, and blow molding is used.

Specifically, the "substantially rod-like shape" is preferably a shape satisfying the following expressions and. If it is out of the range of the following formulas and, the reflected light may not be easily distorted and the glossy distortion pattern may not be easily developed.

1 ≦ P / Q ≦ 10 Formula (P + Q) /L≦0.5 Formula Here, L, P and Q represent the size of the shape of the particles formed by the resin (B). Is the value of. L: average length in the extension direction of particles (μm) P: average major axis (μm) when a cross section perpendicular to the extension direction of the particles is approximated to an ellipse Q: cross section perpendicular to the extension direction of the particles is an ellipse Average minor axis when approximated (μm)

Further, the expression "the resin composition is dispersed by being oriented in the flow direction of the resin composition at the time of molding the preform" means that the resin composition in a molten state at the time of injection or extrusion molding flows. It means that the substantially rod-shaped resin (B) is oriented and dispersed.

The expression "partially changed to an arbitrary direction" means that the orientation direction of the resin (B) in an arbitrary portion of the molded body is changed to a direction different from the flow direction. It means that.

That is, in the molded product of the present invention, the above resin composition is first injection- or extrusion-molded, and the resin (B) is preliminarily oriented in the flow direction of the resin composition in a substantially rod shape. When the molded body is obtained and then the pre-molded body is blow-molded, a temperature distribution is given to an arbitrary position (partial) of the pre-molded body so that the substantially rod-shaped resin (B) is obtained. 1, the resin (B), which is a disperse phase, was regularly oriented as the internal structure of the molded product, as shown in FIG. It has a part and a part arranged irregularly. In FIG. 1, a is resin (A) and b is resin (B).
And the arrow indicates the flow direction of the resin.

Further, the molded product of the present invention has a layered structure in the thickness direction thereof, comprising a layer made of the above resin composition and a layer made of a resin other than the above resin composition. Also has a desired gloss. In this case, the molded product of the present invention has the above-mentioned internal structure at any position (the layer made of the resin composition) in the thickness direction of the molded product.

However, the molded product of the present invention is capable of exhibiting an arbitrary pattern or the like without giving unevenness to the molded product by decoration such as printing or embossing.
Specifically, for example, in the central portion of a cylindrical bottle, while the surface of the molded body is a quadric surface, an arbitrary gloss distortion pattern can be expressed by the shape of the irregularly arranged portions. is there. Examples of the gloss distortion pattern include dots of dots and letters such as alphabets, but are not limited thereto.

The mechanism for expressing the above-mentioned gloss distortion pattern is considered as follows. The above resin (B) having a substantially rod shape
The direction of light reflection is greatly different between the orientation direction of 90 ° and the orientation direction of 90 °, and a line of light extending in both directions of the orientation direction and 90 ° centering on the reflection of the light source on the surface of the molded body. However, it is considered that when the orientation direction of the resin (B) having a substantially rod-like shape is disturbed, the reflected light is distorted and a gloss distortion pattern is developed.

In the molded product of the present invention, in order to make the gloss distortion pattern clearer, the portion of the molded product in which the orientation direction of the thermoplastic resin (B) is changed is the molded product. It is preferable that the surface has a thickened portion which is raised like a bump or a mountain range. The protrusion of the thick portion may be the inner surface or the outer surface of the molded body,
It is preferably the inner surface.

The height of the ridge is preferably 0.2 mm or more, more preferably 0.3 mm or more, and most preferably 0.
It is 5 mm or more.

Here, the "height of the ridge" means the difference between the maximum wall thickness of the thick wall portion and the minimum wall thickness in the vicinity of the thick wall portion, which does not necessarily have a shape changed in an arbitrary orientation direction during blow molding. It is not necessary that all parts be 0.2 mm or larger.

Further, although the raised thick portion can be easily confirmed with the naked eye, since the reflection intensity at the thick portion is different from that of other portions, the thick portion raised in the shape of a bump or a mountain range is Since it is thick, the gloss distortion pattern becomes clearer due to an increase in internal diffuse reflection light than other parts, so it can also be confirmed by measuring the change in the reflection intensity of the thick part and its peripheral part. It is considered possible.

Next, the method for producing the molded article having a gloss of the present invention will be described in detail.

[Description of Production Method (1)] In the production method (1) for a molded article having a gloss of the present invention, the resin composition is injected or extruded to form a pre-molded article, and A method for producing a molded body, comprising blow-molding a pre-molded body, comprising contacting a surface of the pre-molded body with a jig whose temperature is controlled to a temperature lower than the temperature of the surface before the blow-molding of the pre-molded body. It is characterized in that the temperature distribution is made to occur and then blow molding is performed.

The production method (1) of the present invention will be described over time. In the production method (1) of the present invention, the following (I) to
(III) is sequentially performed.

(I) First, the above resin composition is injected or extruded to form a preform. As a method used at this time, a known injection molding method or a known extrusion molding method is used without particular limitation, and specifically, injection molding, co-injection molding (sandwich molding, two-color molding), Examples thereof include extrusion molding and coextrusion molding. The thickness of the obtained preform is preferably 1 to
The range is 8 mm, more preferably 2 to 7 mm, and most preferably 2 to 5 mm. If it is less than 1 mm, blow molding may be difficult, and if it exceeds 8 mm, it may be difficult to make a temperature difference due to the amount of heat of the preform, so it is preferably within the above range. Further, the shape of the preform is preferably a test tube shape, a cup shape, a bag shape or the like.

The preform is a cold parison method in which a preform at room temperature which has been formed in advance is heated to a temperature not lower than the glass transition temperature of the resin (A) and then blow-molded, or a preform. Immediately after molding, the preform can be supplied to the next step (II) in a heated state by a hot parison method or the like in which blow molding is performed while maintaining the glass transition temperature of the resin (A) or higher. .

(II) Next, the jig is brought into contact with the preform to obtain a temperature distribution. At this time, the jig may be brought into contact with either the inner surface or the outer surface of the preform, but the outer surface is preferable because the temperature difference is strict and the gloss distortion pattern is likely to be clear.

The temperature of the preform (the surface temperature of the preform immediately before blowing) is preferably 70 to 200.
C., more preferably 80 to 150.degree. C., and most preferably 90 to 130.degree. If it is less than 70 ° C, the preform may be too hard to make blow molding difficult, and if it exceeds 200 ° C, it may be too soft to make blow molding difficult. Preferably.

The temperature of the jig is lower than the surface temperature of the preform, preferably 120 ° C. or lower, more preferably 100 ° C. or lower, and most preferably 80.
It is -80 degreeC. When the temperature exceeds 120 ° C, the molding conditions must be considerably limited in order to obtain the temperature distribution, and it may be difficult to obtain the temperature distribution in the normal operation. Therefore, the temperature is preferably 120 ° C or less.

Furthermore, the contact time of the jig is not particularly limited depending on the molding conditions of the preformed body,
It is preferably in the range of 1 to 40 seconds, more preferably 3 to 30 seconds, and most preferably 5 to 25 seconds. If it is less than 1 second, the glossy distortion pattern becomes unclear, and if it exceeds 40 seconds, the molding cycle becomes unreasonable.

The temperature difference between the part in contact with the jig and the other part is not particularly limited because it varies depending on the thickness of the preform and the like, but is preferably 2-5.
It is preferable to adjust the temperature to be 0 ° C, more preferably 5 to 50 ° C, most preferably 10 to 50 ° C. If it is less than 2 ° C, the glossy distortion pattern may become unclear, and if it exceeds 50 ° C, blow molding may become difficult. Therefore, it is preferable to set it within the above range.

That is, in this step, the preform is provided with a temperature distribution in a portion (80 to 250 ° C.) not in contact with the jig and a portion (10 to 150 ° C.) in contact with the jig. Is supplied for blow molding in the next step.

(III) Finally, the preform having the temperature distribution as described above is blow-molded to obtain a compact.
As the method for blow molding, known blow molding methods such as stretch blow molding can be used without particular limitation.
The stretch ratio when performing blow molding is uniaxial,
The range is preferably 1.1 to 10 times, more preferably 1.
The range of 1 to 8 times, most preferably 1.1 to 5 times is preferable. If the stretching ratio is less than 1.1, the glossy distortion pattern may be unclear, and if it exceeds 10 times, the film may be stretched excessively and a difference in wall thickness may be difficult to occur. Preferably. Further, at the time of blow molding, it does not matter whether or not it is longitudinally drawn by a drawing rod for longitudinal drawing.

When molding a preform by the above injection or extrusion molding, the melt viscosity η of the resin (A) is
Η _B / η _A between _A and the melt viscosity η _B of the resin (B)
It is preferable to control the resin temperature and the shear rate so that the relationship of <0.5 holds. The resin temperature is the temperature of the resin at the time of injection or extrusion molding, and is usually 180 to
It is in the range of 330 ° C. The shear rate is the shear rate at the injection gate or the extrusion slit.

By controlling the resin temperature and the shear rate so that the above relationship is established, in the obtained molded product, the resin (B) having a substantially rod-like shape satisfying the above expressions and is obtained at the time of molding the preformed product. A plastic molded product oriented in the flow direction of the resin composition is obtained. η _B
When / η _A ≧ 0.5, the shape of the resin (B) is not a substantially rod-like shape satisfying the above formulas and may be a nearly spherical shape, which is not preferable.

[Description of Production Method (2)] In the production method (2) of the molded article having gloss of the present invention, the resin composition is injected or extruded to form a pre-molded article, and A method for producing a molded body by blow molding a preformed body, characterized in that the preformed body has a difference in wall thickness at any one or at least two portions.

The method for forming a preform by injection or extrusion molding and the method for blow-molding the preform are described in [Description of manufacturing method (1) above].
It is the same as the method described in detail in (I) and (III). That is, the production method (2) of the present invention is the same as the production method (1).
Instead of the step (II), the following step (II) 'is performed.

(II) 'A thickness difference is formed in any one or more portions of the preform. To form the above thickness difference,
It is preferable to carry out simultaneously with the molding of the preform by the injection or extrusion molding (that is, at the same time with the step (I)). Specifically, this step can be performed, for example, by performing injection or extrusion using a die, slit, or the like having a shape that produces a desired thickness difference when performing injection or extrusion. . The above thickness difference is
It is preferably 0.3 mm or more, more preferably 0.5 mm or more, and most preferably 0.7 to 7 mm. If the thickness is 0.3 mm or less, the temperature distribution is difficult to form and the pattern may become unclear, which is not preferable.

The molded article of the present invention is suitable as a container or the like which generally requires an excellent appearance and a sales promotion effect as described below. For example, Moisture Lotion,
Massage lotions, skin lotions, cleansing lotions, emollient lotions, baby oils and other skin lotions, makeup creams, vanishing creams, emollient creams and other skin creams, liquid foundations and other face care products,
Skin care, body care, makeup cosmetics, shampoo, conditioner, hair conditioner, perm blow agent, hair care products such as hair color, whole body cleaning agent, body care such as liquid hand soap, hand care products, liquid laundry detergent, mildew remover, A container for filling glass cleaners, bleaches, softeners, glues, dishwashing detergents, cleansers, various household detergents, and other foodstuffs and pharmaceuticals that generally require a good appearance.

[0057]

[Examples] Hereinafter, specific examples will be described.
The invention is not limited to only these examples.

[Example 1] Polyethylene terephthalate having an intrinsic viscosity of 1.05 and a refractive index of 1.575 [Mitsui PET Resins Co., Ltd., trade name, "Mitsui PET J15"]
5 "] is a resin (A) dried with hot air at 150 ° C. overnight,
70 polymethylmethacrylate having a refractive index of 1.490 [Asahi Kasei Co., Ltd., trade name, "Delpet 560F"]
Resin (B) dried under reduced pressure at 760 mmHg overnight at 780 ° C is mixed at a weight ratio of 88:12 and the resin temperature is about 280 ° C
Kneaded with 2 axes [φ45 mm, manufactured by Ikegai Iron & Steel Co., Ltd., trade name,
"PCM45-30 type"], extruded in a strand shape,
After cooling, it was cut with a cutter to obtain pellets.

The melt viscosity of these resins was measured using "Capirograph 1B" (trade name, manufactured by Toyo Seiki Seisakusho Co., Ltd.).
The melt viscosity ratio was 0.37 as measured by the resin temperature and the shear rate during molding.

A hot-parison stretch blow molding machine [made by Nissei ASB Co., Ltd., trade name, "ASB"]
50 MH "], injection molding is first performed to obtain a resin amount of 2
A test tube-shaped preform having a weight of 3 g, a length of about 104 mm and a wall thickness of about 3 mm was obtained. The surface temperature of the obtained preform was measured by an infrared imager [Nippon Avionics Co., Ltd., trade name, "T
VS-5000 "], it was 125 ° C. Then, as shown in FIG. 2, a circular jig whose temperature was controlled at about 2 ° C. was provided on each surface of the preformed body in the direction of the anti-parting line (bottle front and back) when the bottle was formed into three pieces on each side. Each of them was contacted for 10 seconds to give a temperature distribution. After that, by stretch blow molding, blow molding is performed at a circumferential direction of 2.8 times and a height direction of 1.8 times, and an internal capacity of about 300 ml, a height of about 180 mm, a width of about 70 mm,
A flat bottle having a flat shape with a thickness of about 42 mm was obtained. still,
In FIG. 2, 1 is a preform and 2 is a jig.

At this time, the surface temperature of the preform immediately before blowing was measured using the above infrared imager. The temperature was controlled at about 114 ° C. with the circular jig, and about 125 ° C. at other portions. The temperature difference between the part in contact with the jig and the other part was 11 ° C. As shown in FIG. 3, in the obtained flat bottle, a glossy distortion pattern of a beautiful dot pattern was visually recognized on the front surface, and a difference in wall thickness of about 0. There was an 8 mm bump.

[Example 2] Parting line direction (both sides of the bottle) when forming a bottle in the preformed body
A preform was molded and blow-molded in the same manner as in Example 1 except that a circular jig was contacted with three points on each side to provide a temperature distribution, and a flat bottle was obtained. In the flat bottle obtained, a glossy distortion pattern of a beautiful dot pattern was visually recognized on both sides, and a bulge with a thickness difference of about 1.2 mm was formed on the inner surface of the part where the pattern was visible. It was

[Example 3] Molding of a preform and blow molding were carried out in the same manner as in Example 1 except that a jig having an "S" shape in the alphabet was brought into contact with the surface of the preform to give a temperature distribution. To obtain a flat bottle. As shown in FIG. 4, a gloss distortion pattern of “S” was visually recognized in the obtained flat bottle, and a bulge having a thickness difference of about 0.6 mm was formed on the inner surface of the bottle at that portion.

[Embodiment 4] A resin amount of about 33 is obtained by injection molding.
g, perimeter length about 180 mm, length about 104 mm, wall thickness 3.2
In Example 1, except that a protrusion having a thickness of about 4.2 mm (thickness difference of about 1 mm) and a width of about 3.5 mm was provided on the inner surface side as a vertical streak extending from the top to the bottom of the preform. A preform was molded in the same manner as in, and a flat bottle was obtained by blow molding in the same manner as in Example 1 except that the jig was not contacted and the stretching ratio in the circumferential direction was 2.1 times. A radial cross-sectional view of the preform is shown in FIG. In the obtained flat bottle, the protrusion has a wall thickness of about 1.4 mm, and the peripheral portion has a thickness of about 0.5 mm.
The difference in wall thickness was about 0.9 mm. In the flat bottle thus obtained, a beautiful vertical stripe-like gloss distortion pattern was visually recognizable.

[Comparative Example 1] A preform was molded and blow-molded in the same manner as in Example 1 except that the preform was subjected to blow molding without temperature control with a circular jig. Got a bottle The flat bottle obtained is
Although glossy, the gloss was uniform and was not accompanied by a gloss distortion pattern.

[0066]

EFFECTS OF THE INVENTION The glossy molded article of the present invention has gloss accompanied by a gloss distortion pattern and gives a high-grade feeling. In addition, according to the method for producing a molded article having gloss of the present invention, it is possible to control the gloss strength of the obtained molded article and develop an arbitrary gloss distortion pattern.

[Brief description of drawings]

FIG. 1 is an enlarged schematic view showing a resin dispersion state (internal structure) in a molded article of the present invention.

FIG. 2 is a schematic view showing a mode in which a jig is brought into contact with the preform in Example 1.

FIG. 3 is a front view showing the bottle obtained in Example 1.

FIG. 4 is a front view showing the bottle obtained in Example 3.

FIG. 5 is a radial cross-sectional view of the preform used in Example 4.

Claims (6)

[Claims] 1. A thermoplastic polyester resin (A) 98-
50 parts by weight and 2 to 50 parts by weight of a thermoplastic resin (B) which is incompatible with the thermoplastic polyester resin (A), the thermoplastic polyester resin (A) and the thermoplastic resin (B) The resin composition having a difference in refractive index in the non-oriented state of 25 ° C. of more than 0.05 is injection- or extrusion-molded to form a preform, and then the preform is blow-molded to obtain the heat Molded article obtained by dispersing the thermoplastic resin (B) in the matrix of the thermoplastic polyester resin (A) in a substantially rod-like shape and oriented in the flow direction of the resin composition at the time of molding the preformed article. In addition, the orientation direction of the thermoplastic resin (B) is partially changed to an arbitrary direction, and a molded article having gloss. 2. The portion of the molded body in which the orientation direction of the thermoplastic resin (B) is changed forms a bump or a mountain-shaped thick portion on the inner surface of the molded body. The molded article having a gloss according to claim 1, characterized in that. 3. The thermoplastic polyester resin (A)
Is a lustrous molded article according to claim 1 or 2, which has ethylene terephthalate as a main repeating unit and has an intrinsic viscosity of 0.65 to 1.40. 4. The thermoplastic resin (B) is at least one resin selected from the group consisting of polyolefin resins and poly (meth) acrylic resins. A molded article having the gloss according to any one of 1. 5. A thermoplastic polyester resin (A) 98-
50 parts by weight and 2 to 50 parts by weight of a thermoplastic resin (B) which is incompatible with the thermoplastic polyester resin (A), the thermoplastic polyester resin (A) and the thermoplastic resin (B) In the method for producing a molded product, the resin composition having a difference in refractive index in a non-oriented state at 25 ° C. of more than 0.05 is injection- or extrusion-molded to form a pre-molded product, and then the pre-molded product is blow-molded. Before the blow molding of the preform, a jig whose temperature is lower than the temperature of the surface is brought into contact with the surface of the preform to give a temperature distribution, and then blow molding is performed. A method for producing a molded article having a characteristic gloss. 6. A thermoplastic polyester resin (A) 98-
50 parts by weight and 2 to 50 parts by weight of a thermoplastic resin (B) which is incompatible with the thermoplastic polyester resin (A), the thermoplastic polyester resin (A) and the thermoplastic resin (B) In the method for producing a molded product, the resin composition having a difference in refractive index in a non-oriented state at 25 ° C. of more than 0.05 is injection- or extrusion-molded to form a pre-molded product, and then the pre-molded product is blow-molded. A method for producing a molded article having a gloss, wherein the pre-molded article has a wall thickness difference at any one or at least two portions.