JPS6095295A - Thermosetting resin pipe for transferring fluid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermosetting resin tube for fluid transfer.

Conventionally, metal pipes and thermoplastic resin pipes such as polyvinyl chloride have been used as fluid transfer chambers for transferring water, oil, and other liquid substances, and air, gas, and other gases.

Although gold IA-# is strong, it is heavy, has poor workability, and has problems such as corrosion.Although it has excellent heat resistance and flammability, it has poor insulation properties, and in the event of a fire, it can damage the inside of the pipe. may transfer high heat to the fluid and pipe supports or surroundings, potentially causing the spread of a fire.

Furthermore, it is well known that thermoplastic resin pipes are lightweight, have corrosion resistance, are inexpensive, and have poor heat resistance and flame resistance.

Therefore, it is conceivable to use thermosetting resin pipes with high heat resistance, flame resistance, corrosion resistance, heat insulation properties, etc. for this purpose, but conventional molding methods can easily produce expensive and flimsy materials. Because of the reserve, it is not practical for this purpose.

In other words, long tubes of thermosetting resin are generally molded by plunger extrusion molding. Because of this, it is difficult to obtain a uniform molded product, and the productivity is also low at low degrees Celsius.A molding method has been developed that requires dies and screws. Resin tends to stagnate in the interior of the tank, so the reaction may progress locally, or a slight change in pressure or temperature may cause the reaction to proceed rapidly. ζ, it was difficult to perform stable molding continuously. In addition, in any of the above methods, only a material with low strength in the circumferential direction of the arm can be obtained, and as a result, it is weak for internal and external use and cracks in the axial direction of the tube against impact. There were problems with practical E, such as being easy to use. This is thought to be due to the fact that in conventional extrusion, the resin itself and the fibrous filler are disposed in the extrusion direction, that is, in the axial direction of the tube.

In other words, shaping and hardening progress while the melting resin guides the gold inside and moves along the flow in the mold, so the direction of movement of the resin during that time is the extrusion direction,
In other words, it is thought that this is because only the tube axis direction is used, and the resin, fibrous filler, etc. are oriented in that direction.

The present inventors have solved these shortcomings and also improved heat resistance and
As a result of various studies in order to provide a resin pipe for fluid transfer that has flame resistance, copper corrosion resistance, light jetting, and low profile, we decided to use a screw with a smooth part at the tip, The present invention was achieved by discovering that this object can be achieved by shaping the material to such an extent that it can retain its self-cedar shape after extrusion.

In other words, the present invention uses a screw having a smooth portion at the tip, and the smooth portion 71 is shaped to the extent that it can maintain a self-cedar shape after extrusion. Chill with a pipe.

The thermosetting resin pipe of the present invention is, for example,
It is manufactured by the method described in 26, but the feature of this manufacturing method is that it uses a screw with a smooth part at the tip, and the smooth part is shaped to the extent that it can maintain its own cedar shape after one shot. In fact, with this method, it is possible to produce small thermosetting resin tubes cheaply and with low productivity, while conventional extrusion molding is difficult.

Zunawachi; ('iil convenience introduced within the installation,
＞J fat 41 mortar is heated and melted while moving from the screw supply section to the compression section, passes through the metering section Y+, and moves from the nolite tip of the metering section to a smooth section in a helical shape, where the silling-inner wall Due to the frictional resistance between the two screws, the gap created by the screw fugitate is narrowed and eventually the screw is compressed and loosened.

Next, the resin is shaped into a smooth part during one preliminary run, and is extruded from the tip of the cylinder into a continuous tube. During this time, the cooking fat moves in the direction along the 4-screw groove from the supply section to the weighing section while receiving the 1.
The fat itself and the fibrous material, etc., are oriented in an irregular direction without being oriented to the extrusion direction of the tube, and are oriented in an irregular direction to the smooth part. As the curing progresses after the transition, the four major physical forces are controlled as they are, and as a result, the resin itself and the fiber split L' large filling 4 Of course, the l of the pipe
It is considered that the clearance between the 1i111 direction and the day direction' (upwards to Nokura/Su East 1, the axial direction of the obtained tube and the degree of blood contraction in the direction perpendicular to the tube axis) is well reduced.

Table 1 below shows the angular contraction i! in the direction perpendicular to the tube axis. , Li degree (A) and compressive strength in the tube axis direction (13) and A/Bσ
Hydraulic pressure test shop ink was written on the same level as Tsuhi.

From this table, as shown in W%, the conventional pipe has a small A/13 ratio of 0.37 and is more likely to cause vertical splitting, compared to the pipe of the present invention. IA/B'lZb
It can be seen that the thickness is ζ0.4 to 1.5, and is suitable for internal pressure without causing vertical separation.

In the present invention, compressive strength in 9 axial directions (upper, JIS-■
Test according to Section 5.19.5 of Gu-6911
It represents the strength when a good pipe is broken (including polymerization with cracks) after it has been subjected to the J1 test), and is perpendicular to the pipe axis.
') 5-way compression part 1 inkstone is J'lS, K 6741-5
．． Performed the test according to Section 6 (Henpei test) and passed 2←＼Failure°
: Traced (represents the strength of the temple).

Thermosetting resins used in the present invention include porcelain, phenolic resin, melamine) E411, Kinren I, urea resin, non-enclosing polyester resin, F1F xy, silicone resin, allyl resin , Aniline available 11 effects, etc.''
- Sheep, especially phenolic resin, melamine bark,・
■It is preferable to use dunn resin.

In the thermosetting resin used in the present invention (i, depending on your peace of mind, in one form of the thermosetting resin - 11 in 11'!'
Fillers, mold release agents, thickeners, colorants, Bunkun Mei 11, A [I.

A fuel, a foaming agent, a polymerization initiator, a curing accelerator, an incompatible agent, etc. can be added. Also dragged into the river (heavy polymer or organic or inorganic σ) 1. You can also add aK i #, i dog 4 course, ρriba glass 7, cultivation fiber, etc.

For fluid transfer using these thermosetting resins, gcz, 1I
ii+; I'm worried about the heat and heavy oil, gasoline, etc.
71J1 etc. σ) 7+I, alcohols, ketones, esters, aromatic hydrocarbons, organic solvents, acids, alkalis, etc. Not only is it resistant to phenolic resins, melamine resins, xylene resins, etc. as molding materials. By using a flame, it will not spread even if it is
It has excellent flame resistance properties, such as not causing dropping, maintaining its original shape, and not emitting toxic gas.

The tube manufactured by the method of the present invention not only has heat resistance, flame resistance, corrosion resistance, and chemical resistance, but also has the advantage that the tube is not filled with resin or fibrous filler during tube molding. Since the tube is oriented in a well-balanced manner in the III-IJj direction and the circumferential direction, the tube has good balance of strength in the extrusion direction and the direction perpendicular thereto, and has excellent pressure resistance, making it suitable for fluid transfer tubes.

To specifically explain the uses of the thermosetting resin pipe of the present invention,
Water supply pipes, hot water supply pipes, and drainage pipes (e.g., baths, water heaters,
Water supply and drainage pipes for coolers, solar systems, etc., general drainage pipes, etc.), oil supply and drainage pipes (factories, vehicles, ships, aviation), chemical transfer pipes, etc. are leaking.

In addition, for gas transfer, air pipes, ventilation pipes, exhaust pipes of general houses, buildings, factories, etc. (e.g. gas ranges, stoves, internal combustion engine air pipes, exhaust pipes, general ventilation pipes, general air pipes, Examples include general exhaust pipes, etc.), gas transfer pipes for chemical factories (for example, nitrogen, argon, helium, etc.).

The present invention will be further explained below with reference to examples.

Production line 1 0 diameter 3'L++m, L/D==22 extruder,
The diameter of the bottom of the screw is 25 mm, and the diameter of the machine part IL is 25 mm at the tip! 11111 length is 120 yr (4
A pipe was extrusion-molded using a screw with a compression ratio of 2.3 having a smooth portion (D) and a phenol resin (manufactured by Nippon Oil Seal Co., Ltd., trade name: Rogers RX-6684) as a molding material.

The temperature of each part of the cylinder is Ct(o~2D)...Water cooling C4(3D~10D)...80°C C3(1,,1])~18D)...100°Cc4(1
, 9D to 22D)... Extrusion molding was carried out at a temperature of 120° C. and a screw rotation speed of 35 rpm to obtain an outer diameter of 30 +1 LII+ and a wall thickness of 2.5; +++ 50 mm.

Production Example 2 Using the same extrusion device as Production Example 1, phenol resin (manufactured by Matsushita Electric Works Co., Ltd., product name CN-4610) was used as a molding material.
) was used to extrude the pipe.

The temperature of each part of the cylinder is C, - water cooling, CL = 80°C
Extrusion molding was carried out at 1Cg = 110°C and C4 = 120°C with a screw rotation speed of 35 rpm to obtain a pipe with an outer diameter of 30 mm and a wall thickness of 2.5 mm.

Production@Example 3 Using the same extrusion equipment as Production Example 1, phenol resin (manufactured by Sumitomo Bakelite Co., Ltd., product name PM-7) was used as the molding material.
95J) was used to extrude into a pipe.

The temperature of each part of the cylinder is CI = water cooling, CL = 75°C
Extrusion molding was carried out at 1C di=105℃ and C4-120℃, and the screw rotation speed was 35 rpm to obtain an outer diameter of 30℃.
A pipe with a thickness of +++n and a wall thickness of 2.5 ynm was obtained.

Production Example 4 The same extrusion as Example 1 - '1'; 4 was extruded to 114; The temperature of each part of the cylinder was C1 - water cooling, c,
Extrusion molding was performed at a screw rotation speed of 35 rpm at a temperature of 120° C., 120° C., and 130° C. to obtain a pipe with a diameter of 4, 30 mrn, and a wall thickness of 2.5 mm.

The performance of the pipes obtained in each production example was as shown in Tables 1 and 2. From these results, it was found that the thermosetting resin tube of the present invention has a balance of strength in the packing direction and in the direction perpendicular to the tube axis. ll] I can see that you are also worried about chemicals.

Note 3: A pipe with a length of 60 crtt is connected to the fulcrum path N (115
It was placed horizontally on a 0 cm support stand and left at 180°C for 2 hours, and then changes were observed.

Note 4: A tube with a length of 60 mm was placed horizontally on a support stand with a distance between fulcrums of 50 CnL, and the tip of a stable blue flame of a Bunsen burner with a height of about 5 om was brought into contact with the center of the tube for 3 minutes from directly below. After that, we observed the changes.

Note 5: A tube with a length of 5αn was immersed in the test liquid and left to stand under the following conditions, and changes were observed.

Hot water = 100°C x 24 hours Other test liquids - room temperature x 1 week Note 6°゛・'1゛ Kogyo Co., Ltd., product name No. 1 (abbreviation), outer diameter 30 mm, wall thickness 2.5 m + a Patent applicant Mitsui Toatsu Chemical Co., Ltd.

Claims (1)

[Claims] A thermosetting resin pipe for multiple fluid transport, which is formed by using a screw having a smooth portion at the tip and shaping the smooth portion to the extent that it can maintain its own shape after extrusion.