JP2004352784A - Thermoplastic resin molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a thermoplastic resin molded article in which reduction force developed in drawing an alloyed resin of a PET resin and an ABS resin by a rolling method is reduced and which has a high draw ratio. <P>SOLUTION: The thermoplastic resin molded article is obtained by drawing and forming a molded article which is an alloyed resin of a polyethylene terephthalate resin and an ABS resin and contains 0.05-0.5% of a lubricant in a mass ratio between rolls under pressure at 1.1-5 times. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stretch molded article of a thermoplastic resin comprising a polyethylene terephthalate (PET) resin and an ABS resin.
[0002]
[Prior art]
Conventionally, by forming PET resin and ABS resin into alloy, it is possible to obtain high strength and heat resistance by stretch molding which are the characteristics of PET resin, impact resistance which is the characteristic of ABS resin, and adhesion to other resins. Can be.
[0003]
It is known from Patent Document 1 that two kinds of resins are alloyed and stretched.
[0004]
By the way, as a method of stretch-molding the alloyed resin, there are a roll stretching method using a speed difference between two or more rolls, a tenter stretching method, a blow stretching method, and a stretching method by compression between two rolls. .
[0005]
Here, in the stretching by the rolling method, there is a problem that it is difficult to obtain a thermoplastic resin molded product having a high stretching ratio because the pressure applied to the roll is large, and it is necessary to make the stretching equipment strong. is there.
[0006]
A conventional example in which an internal lubricant is added to a biaxially stretched composite styrene-based resin sheet and molded is also known from Patent Document 2, but this is a lubricating material obtained by alloying a polyethylene terephthalate resin and an ABS resin. Is not added.
[0007]
[Patent Document 1]
JP-A-63-114628 [Patent Document 2]
JP-A-2-120044
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and has as its object to reduce the rolling force generated when an alloyed resin of a PET resin and an ABS resin is stretched by a rolling method.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a thermoplastic resin molded product according to the present invention is formed by rolling a molded product obtained by alloying a polyethylene terephthalate resin and an ABS resin and adding 0.05 to 5% by mass of a lubricant in a mass ratio. It is characterized in that it is stretch-formed from 1.1 to 5 times by pressurizing between them.
[0010]
By adding 0.05% to 5% by mass of a lubricant to the alloyed resin obtained by alloying the polyethylene terephthalate resin and the ABS resin in this manner, the surface friction resistance of a molded article of the alloyed resin is reduced, The rolling force generated when the alloyed resin is stretched by the rolling method can be reduced, and the rolling equipment can be simplified.
[0011]
Here, the amount of the lubricating material to be added is determined by the amount of reduction of the surface friction resistance, the properties such as the physical properties of the resin molded product and the type of the lubricating material. The range of from 05% to 5% is desirable. If the amount is 0.05% or less, no effect of reducing surface friction is observed, and if the amount is 5% or more, the strength of the molded article decreases. It is not preferable because problems such as an increase in viscosity during melting and the like occur.
[0012]
Further, it is preferable to use a fatty acid, a fatty acid metal salt, or a polyolefin wax as the lubricant.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0014]
In the present invention, by forming a polyethylene terephthalate resin (PET resin) and an ABS resin into an alloy, the high strength and heat resistance by stretch molding, which are the characteristics of the PET resin, and the impact resistance and the other characteristics of the ABS resin are obtained. Adhesion with a resin (for example, an acrylic resin having high weather resistance) can be obtained, and 0.05% to 5% by mass is added to the alloyed resin obtained by alloying the PET resin and the ABS resin. The thermoplastic resin molded article of the present invention is obtained by stretching the molded article to which the lubricant is added by 1.1 to 5 times by pressing between rolls.
[0015]
Fatty acids, fatty acid metal salts or polyolefin waxes are used as the lubricant. That is, stearic acid, zinc stearate, calcium stearate and the like can be mentioned as the fatty acid or fatty acid metal salt, and polyethylene wax, polypropylene wax and the like can be mentioned as the polyolefin wax.
[0016]
Here, by adding the PET resin and the ABS resin to the alloyed resin in which the PET resin and the ABS resin are alloyed in the above range to the alloyed resin in which the PET resin and the ABS resin are alloyed, the surface friction resistance of the molded article of the alloyed resin is reduced. In addition, the rolling force generated when the alloyed resin is stretched by the rolling method can be reduced, whereby the stretch molding can be performed 1.1 to 5 times by pressing between the rolls.
[0017]
Hereinafter, specific examples of the present invention will be described with reference to examples.
[0018]
【Example】
(Example 1)
30 parts by mass of an ABS resin (Toyolac 600, manufactured by Toray Industries) is blended with 70 parts by mass of a PET resin (“NES2070” manufactured by Unitika Ltd.), and 3% by mass of the total of the PET resin and the ABS resin is added. A solubilizer (epoxy-modified polystyrene resin) and 1% of zinc stearate were blended, uniformly dispersed, melted and mixed by a twin screw extruder, and extruded into a 2 mmφ cylindrical shape. After cooling the extruded product, the extruded product was cut to a length of 2 mm with a pelletizer to obtain an alloyed resin pellet of a PET resin and an ABS resin to which zinc stearate was added.
[0019]
By extruding the alloyed resin pellets, a plate-shaped thermoplastic resin molded article 1 having a thickness of 2 mm and a width of 80 mm was obtained. The plate-shaped thermoplastic resin molded product 1 thus obtained was stretched three times by rolling between two rolling rolls 2 controlled at a temperature of 100 ° C. as shown in FIG.
[0020]
(Example 2)
30 parts by mass of an ABS resin (Toyolac 600, manufactured by Toray Industries) is blended with 70 parts by mass of a PET resin (“NES2070” manufactured by Unitika Ltd.), and 3% by mass of the total of the PET resin and the ABS resin is added. A solubilizer (epoxy-modified polystyrene resin) and 1% polyethylene wax (“Licowax PE830” manufactured by Client Japan) are blended, uniformly dispersed, and then melted and mixed by a twin-screw extruder to form a 2 mmφ cylindrical shape. Extruded. After cooling the extruded product, the extruded product was cut into a length of 2 mm with a pelletizer to obtain an alloyed resin pellet of a PET resin and an ABS resin to which polyethylene wax was added.
[0021]
By extruding the alloyed resin pellets, a plate-shaped thermoplastic resin molded article 1 having a thickness of 2 mm and a width of 80 mm was obtained. The plate-shaped thermoplastic resin molded product 1 thus obtained was stretched three times by rolling between two rolling rolls 2 controlled at a temperature of 100 ° C. as shown in FIG.
[0022]
(Comparative example)
30 parts by mass of an ABS resin (Toyolac 600, manufactured by Toray Industries) is blended with 70 parts by mass of a PET resin (“NES2070” manufactured by Unitika Ltd.), and 3% by mass of the total of the PET resin and the ABS resin is added. After blending a solubilizer (epoxy-modified polystyrene resin) and uniformly dispersing it, it was melted and mixed by a twin screw extruder, and extruded into a 2 mmφ cylindrical shape. Then, after cooling the extruded product, the extruded product was cut into a length of 2 mm with a pelletizer to obtain an alloyed resin pellet of a PET resin and an ABS resin.
[0023]
By extruding the alloyed resin pellets, a plate-shaped thermoplastic resin molded article 1 having a thickness of 2 mm and a width of 80 mm was obtained. The plate-shaped thermoplastic resin molded product 1 thus obtained was stretched three times by rolling between two rolling rolls 2 controlled at a temperature of 100 ° C. as shown in FIG.
[0024]
In Examples 1, 2 and Comparative Examples described above, the rolling force applied to the rolling roll was measured. The rolling force was measured by a load cell attached to a rolling roll. As a result, Example 1 had a rolling force of 5 tons, Example 2 had a rolling force of 5 tons, and Comparative Example had a rolling force of 8 tons. Examples 1 and 2 were applied to the rolling rolls during rolling as compared with the Comparative Example. The rolling force was reduced.
[0025]
【The invention's effect】
As described above, in the present invention, the surface frictional resistance of a molded article of an alloyed resin can be reduced, the reduction during stretch molding can be reduced, and the rolling equipment can be simplified.
[Brief description of the drawings]
FIG. 1 is a schematic rolling diagram of a thermoplastic resin molded product of the present invention.
[Explanation of symbols]
1 Thermoplastic resin molded product 2 Rolling roll

Claims (2)

A molded product obtained by adding 0.05% to 5% by mass of a lubricant in a mass ratio to a resin obtained by alloying a polyethylene terephthalate resin and an ABS resin and stretched from 1.1 to 5 times by pressing between rolls. A thermoplastic resin molded product, characterized in that: 2. The thermoplastic resin molded article according to claim 1, wherein a fatty acid, a fatty acid metal salt, or a polyolefin wax is used as the lubricant.

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