JPS585225A - Method of molding orientated form - Google Patents

Abstract

PURPOSE:To mold an orientated form, by extruding or stretching a molded body of a thermoplastic resin having a temperature between the glass transition temperature or above and the melting point or below within a die to which a lubricant has been applied, during which time the molded body is in contact with the die. CONSTITUTION:A thermoplastic resin that has been heated and plasticized in an extrusion molder 1 is molded into a thick molded body at a section A of the die 2, and is cooled to a temperature between the glass transition temperature or above and the melting point or below. A lubricant is delivered through a lubricant introducing passage 3 to openings 4 to go to the surface of the resin molded body so that it is applied to the interface between the molded body surface and the die surface. The molded body is rolled at a section B of the die to be biaxially orientated. Thus, it can readily be molded into a thick walled orientated item.

Description

[Detailed description of the invention] The present invention relates to a method of molding an oriented molded article of thermoplastic resin.

Biaxially oriented plate-shaped molded thermoplastic resin products are generally manufactured as sheets with a thickness of 1 mm or less. Biaxially oriented sheets with a thickness of 1 mm or less are manufactured by continuously or sequentially extruding original fabric sheets. It can be easily produced by simultaneously pulling it in two axes. However, biaxially oriented sheets with a thickness of 1 mm or more cannot be easily manufactured. The manufacturing method is rice ■1, snow 4-ma$
However, the manufacturing method is complicated and requires modified manufacturing methods.

! The axially oriented thermoplastic resin sheet a has significantly improved physical properties and chemical properties compared to a non-oriented sheet. 41Kli Hayabusa strength O meat top is worn.

The three-axis granite and nine-thermal resin OII-shaped tumor is conventional.

Rice 1Be I mean 41 Mahatake et al.'s mistake! It is manufactured by pulling it on the shaft and manufactured by pulling it out from the 91 axially oriented coupe. etc. O Problems have been resolved and it is good.

The thermoplastic resin has a temperature higher than the O gas transition temperature.

41111 is a method for forming an oriented molded product, in which a molded product having a temperature below its melting point is extruded or stretched in a well-coated die coated with a lubricant, while being in contact with a gooey, or by pulling the molded product to orient its molecules.

The present invention will be explained with reference to the drawings.

FIG. 1 shows an apparatus for forming an electric wheel orientation sheet (by the method of the present invention). In the first garden, it is heated and plasticized in an extrusion molding machine 1, and made into a molded body with a constant thickness in the thermoplastic resin part, which is above the glass transition temperature and below the melting point temperature.
Refrigerate to 11. In the main part of the window, the resin is cooled in a round shape, and the resin is buried evenly in O2.
The length is & cost. Furthermore, most of the thick-walled molded body o
In order to apply lubricant to the hm and die surface wO interfaces, a series O device is provided to ooze out the lubricant. The high-pressure O-lubricant temperature lubricant introduction path leads to a plurality of seepage ports 4, seeps into the resin molded body IIw, and applies the lubricant Ikls to the molded body IIm and the interface IIO m.

The lubricant O seepage port 4 is made of a substance with small slit-like or sintered metal holes that have fine communication holes, and the lubricant comes out from the fine holes.

It is cooled to a temperature above the glass transition temperature and below the melting point temperature, and the lubricant is uniformly applied to the surface layer 1 of the molded body. Flow at the same speed.

This results in what is called a plug flow. Next, in the die 01 portion, the plug flow Ot shape is rolled and triaxially oriented. Gui OB Part has a structure in which the thickness of the resin is reduced. The flow change of the molded body O in part B is shown in number 11. The molded body continues to flow in the plug flow direction, and at the same time in the direction perpendicular to the flow direction, in the direction of the heavy wheel! The story is fleshed out. The force for rolling the molded body is exerted by the force of extrusion (from an extrusion molding machine).

! The shaft-oriented meat large molded body is further cooled in the die 00 part,
Preferably, the die is cooled to below the glass transition temperature before exiting the die. If necessary, it is further cooled with cold water 2 or the like, and then taken out by a wheel 6 to become a sheath with arbitrary thickness distribution. The heavy wheel oriented sheet is further polished by heating at 11JK using a reel, resulting in a good double wheel oriented sheet.

In the present invention, the thermoplastic resin has a temperature higher than the O gas transition temperature.

The O molded body below the melting point is placed in a container where lubricant is applied.
It is an oriented molding & molding method in which the extrusion is brought into contact with the material, and the molecular orientation is caused by pulling. The zero molecular orientation shown is also absent even in uniaxial orientation. Orientation is carried out by rolling a moderately viscous WIO resin (by means of extrusion force or pulling force) on the rolled resin. The extrusion force is applied using the extrusion force of the extruder shown in Figure 1, or there is also a patch-type molding method in which the large molded product is pre-formed, adjusted to an appropriate temperature, and then extruded through a mechanical force. It will be used. It is preferable to spread the lubricant evenly over the surface of the molded body, and this can be achieved by continuously discharging the lubricant onto the resin molded body and the die area.

Fig. 3 shows a method of forming a small pipe using the same method. It is cooled to a temperature above the glass transition temperature and below the S melting point temperature. The resin is cooled to cool down the resin, and a good length is required to uniformly cool the resin. In addition, in the middle of part D, there is a series of O devices that ooze out lubricant in order to apply the interface IIK lubricant to both surfaces of the inner pipe and the inner surface of the inner pipe. Apply lubricant to both the outside *W and inner surface of the pipe. The high-pressure lubricating rigid wire lubricant introduction path $ leads to the outer surface of the pipe, the inner fitting @ 0 multiple seepage rows, seeps out to the pipe surface, and the lubricant is applied to the interface between the pipe and the 11th surface of the guide. Apply.

The tube is cooled to a temperature above the glass transition temperature and below the melting point temperature, and the lubricant is uniformly applied to the lI box.The resin surface layer and inner core of the tube flow at approximately the same speed within the tube. This results in what is called a plug flow. Next, in the die 01 part, the diameter of the plug flow pipe is expanded, the inner thickness is reduced, and the spiritual axis is oriented. The thick inner pipe is expanded in diameter and rolled by O extrusion pressure from a plug flow O-hole extrusion molding machine, and is simultaneously walled in the VCN shaft in the flow direction and the diameter direction. The triaxially oriented pipe is further cooled in one section of the die, preferably at Kl below the glass transition temperature, before exiting the die. must
! Depending on the situation, add 1.5 liters of cold water! The pipe is cooled to a temperature of 100 degrees, and is taken off by a take-up multi-roll 11 to become a fux-oriented pipe.

The thermoplastic resin mentioned in the present invention can be any thermoplastic resin that is generally used for extrusion molding or injection molding, and thermoplastic resins that can be heated and recycled in an extrusion molding machine can also be used. If you ask me, it's Po9 Styrene.

Styrene-acrylonitrile copolymer, -8 resin.

These include polyvinyl chloride, polymethyl methacrylate, polycarbonate, polyester, nylon, polyphenylene ether, f141Mto funds, copolymers, etc. In Fig. 1 and Fig. 3, an example using one type of resin was explained, but! Multi-layer molded products made of more than one type of resin can be molded in the same way. For example, as shown in Figure 1, one surface layer is polymethyl methacrylate.

A three-layer O thick-walled molded body whose inner core is more powerful than polycarbonate is oriented in the piezoresistance axis, and a good ln-axis alignment can be obtained. In the case of such a three-layer molded product O, the softening temperature of the first surface layer resin is preferably lower than that of the inner core resin. Stand, 1st
In the figure, in part A, the inner molded body is cooled from the surface.1 The surface layer is cooling down.

Since the thick inner molded body exhibits Prada 7p, it is preferable that the surface layer OIk north point be lower in order to maintain uniform viscosity between the surface layer and the inner core.

The lubricants described in the present invention include liquid paraffin, various silicone oils such as polymethylsilokina 7, stearic acid, etc.
4) 1111 Fatsun, various surfactants, etc. These lubricants are applied to the interface WJK between the resin surface and the goo. Furthermore, a resin containing a large amount of these lubricants can be used in the surface layer to function as a lubricant. In order to apply lubricant to the interface between the resin surface and the goo, there are two methods: discharging the lubricant from a porous body with slits or micropores through which the lubricant can pass but not the resin, or using a multilayer sheet or a multilayer pipe. Uses a gou pipe similar to a multi-manifold gouie such as.

A method such as extruding the lubricant to the surface layer from a surface layer manifold can be used.

In the present invention, the glass transition temperature or higher and the melting point temperature or lower is generally a temperature suitable for orienting a synthetic resin,
The preferred temperature range varies depending on the tree 11. For crystalline resins, the temperature is preferably higher than the temperature at which crystallization occurs and lower than the temperature at which the crystals melt. For amorphous tree layers, general injection molding, extrusion molding, etc. below the molding temperature, preferably (the molding temperature - 1°C)
Below.

(Glass transition temperature +10° C.) or higher range II is preferred.

The method of the present invention is a thick-walled O-molded product, preferably 1 thick or more,
More preferably a1. Suitable for O molding of molded products with thickness of S■ or more. Suitable for molding I/It, thick inner sheets, and pipe Os axis oriented molded products.

By the method of the present invention, an oriented molded product with an arbitrary stretching ratio can be obtained, but due to the effects of stretching, etc. ! A stretching ratio of 6 to 10 times (thickness ratio) is preferred.

By the method of the present invention, it is possible to easily mold a thickly oriented molded product, which has been difficult to mold in the past, and its economical effects are significant.

[Brief explanation of the drawing]

1 and 3 are a sectional view of an apparatus for molding a biaxially oriented molded product by the method of the present invention, and FIG. 2 is a partial perspective view illustrating changes in flow of the molded product. 1...Extrusion molding machine 2, 7.
......Die 4, 9...Lubricant seepage port 6, 11.
・・・・・・・・・Take-back roll patent applicant Asahi Dow Co., Ltd. Procedural amendment (Yu-) S/-, 1945/- Director General of the Japan Patent Office Haruki Shima L. Case indication Original patent in 1939 No. 1881 Ma1 No. 2 Name of the invention Orientation Go Glue Crystal O Go III Iron a Relationship with the person making the amendment Patent applicant 1-1-2 Yuto-cho, Chiyoda-ku, Tokyo - Issho "--fi@II -J Akirabi ``Hatsu-・-1 Kashiwa-''
・-@ho Internal Trial (1) Patent Claim O Scope - Meeting *mo and fairy tale amendment ◇t2)
)Next64)X4)ffOr1? More than 11 m1 of slip.”
is corrected to ``from around the l-nail transition temperature.'' -Page 3 jIse line, page 4 jIn line, jllll
) [jlllllff, gs page gis line, iris $ page hall feast. --Issho O, page 1, line 8, insert a sentence between line 1 and 0. An example of continuously press-fitting into an extrusion die to orient the blade axis is good, but in the present invention, a pre-formed thick inner mold is press-fitted into the extrusion die and extruded by mechanical force to orient the blade axis. ◇For example, an ultra-high molecular weight polymethylmethacrylate type 0 product previously formed by the cast method in a cell is pushed into a die coated with aSS lubricant, and extruded using the force of a hydraulic cylinder, etc. It is also possible to make the snow oriented.'' (41, same page, insert the following sentence in line aS, line 4, and section O. fence,
A large molecular weight of O is preferred for Prada 7w- rounding. (5) Insert the following sentence in the same page, page 1, row 1, line 01MIK. "Also, it is also possible to continuously feed the wing axis oriented sheet extruded by the method of the present invention to a pot type die to process it into a 4rll shadow shape. For example, jlEIm, 74
! 0BileO next Kml[0949y connect Gudai,
This makes it easier to cool and solidify the material after it has been turned into a liquid plate and then taken out. ” Claims -L Thermoplastic resin OII from around the transition temperature to below the melting point temperature! The shape is placed in a die containing lubricant with Ik cloth,
Oriented crystal OSm method IL in which molecules are oriented (by extrusion or pulling) in contact with a die, and the axial orientation is -1,& Claims: Paragraph 1 stated O'j! J method Patent claim O, characterized in that the oriented molded crystal is in the shape of a pipe, the method described in item 1, Patent claim 011L11, characterized in that the oriented molded product is in the form of a sheet. Extrusion imaging machine or 6
Continuously press the 11F resin into the molecular orientation die:
Claim III characterized in that h! l Item 1 Item 1
Method description O

Claims (1)

[Claims] 1. By extruding or pulling the OS shape of a thermoplastic resin between the glass transition temperature and above and the melting point temperature in a die in which a lubricant is in contact with a gooey. 〉
Oriented molded product O molding method i characterized by molecular orientation Claim No. illll description method i characterized by triaxial orientation Claim characterized in that the oriented molded product is pipe-shaped The method according to paragraph 1 The method according to paragraph 1 The method according to paragraph 1, in which the oriented crystalline crystal is in the form of a sheet is continuously passed through a molecularly oriented die. O2 method described in claim 1, characterized in that it is press-fitted.