JPH0192264A - Engineering plastic - Google Patents

Abstract

PURPOSE:To obtain a lightweight plastic, consisting of a polyester and/or polyethylene butyl ester, glass beads, aminosilane, surfactant and additive, having a required strength and gloss and capable of effectively utilizing wastes thereof. CONSTITUTION:An engineering plastic having a required flexural strength, tensile strength and gloss is produced by suitably blending (A) a polyester and/or polyethylene butyl ester, e.g., obtained by returning discarded films, etc., into the original state, with (B) glass beads having 3-4mum grain diameter, (C) an aminosilane, (D) a surfactant and (E) an additive (e.g., thixotropic agent, leveling agent or slipping agent).

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to engineering plastics.

"Prior Art and Problems to be Solved by the Invention" Conventionally, there has been no plastic that has higher elasticity, bending strength, and tensile strength than metal. In addition, there is a need for plastics that are lightweight, have the required properties such as strong strength, and gloss as an alternative material to metals and other materials. Furthermore, it is currently difficult to dispose of unnecessary plastics because even if they are incinerated, they cause smoke pollution, so there is a need for effective use of waste plastics.

``Means for Solving the Problems of the Invention'' In view of the above-mentioned circumstances, the present invention has been devised to provide a material that can be used as an alternative material to metals, has the necessary properties such as being lightweight and having stronger strength and luster than metals, and is capable of effectively utilizing waste plastics. Engineering plastics made of polyester and/or polyethylene butyl ester, glass beads, aminosilane, surfactants and additives.
Function: By appropriately blending polyester, polyethylene butyl ester, glass beads, aminosilane, surfactants, and additives, the desired bending strength, tensile strength, and gloss can be obtained.

"Example" material Use polyester or polyethylene butyl ester.

This polyester or polyethylene butyl ester may be a discarded material such as a film or a PET bottle.

Aminosilanes are used for coupling and cross-linking in order to bond different substances together and improve their strength.

Polyamideimide, particle size 3-4μm for strength
using glass beads.

To increase heat resistance, polyamideimide and aminosilane are coupled and cross-linked, and then colored (bonded) with the base raw material.

11 Manufacturing process and equipment The manufacturing process and equipment are shown in FIG. 1 as an example.

When using discarded polyester or polyethylene butyl ester as a raw material, in order to return it to the original raw material of polyethylene terephthalate, it is necessary to
! 2 and then supplied to the extruder 4 from the hopper 3,
The required wire or band is passed through a nozzle 5 and a die 6, passed through a cooling bath 7, and then passed through a first drawing 8.
The film is passed through a warm water bath 9, a second stretching 10, a third stretching 11, and then wound up by a winding machine 12.

Type 1j8 also has a moisture content of Gai raw material pellets of 50 ppm or less.
Extruder 280-290°C Nozzle 265-275°C Mold 270-280°C Stretching ratio 1st stretching 4.0-4.5 2nd stretching
1.1 Third stretching 0.
99-1.0 Characteristics When the wire or band coming out of the cooling bath 7 is stretched in the order of first stretching, second stretching, and third stretching, the physical properties change. Improves bending strength and tensile strength. This is because the molecular arrangement cross-links like a rope. Glass fiber, which can be understood as an unsaturated polyester, has tens of times the strength and resistance of additives.

・Next, we will discuss examples of imparting bending strength, tensile strength, and gloss.

5--1 Example with strong bending strength (1) Raw material polyester 70-75%
or polyethylene butyl ester 70-75%
Glass beads 23% aminosilane Added at 150°C for 15-20 minutes Q 0.
4% surfactant 0.2
%Thixotropic agent/leveling agent 1.2
% (2) Characteristics The bending strength is 180' in one direction and 180' in the opposite direction as shown by arrows A and B when the wire W is clamped and fixed by the holders 21 and 21 as shown in Fig. 2. °Folding was repeated.

In this test, samples with the same diameter were measured, and the number of bends was 180°.

Therefore, the wire of the present invention has a bending strength of about 250 times that of steel wire.
With a bending strength about 500 times that of steel wire, the wire of the present invention has a bending strength of 115.5 times that of steel wire.
/6.5 weight.

The product of the present invention is lightweight, strong against bending, and does not rust like metal.

Additionally, glass beads and aminosilane contribute to the improvement of bending strength.

V--I Examples with tensile strength (1) Raw material polyester 80-82% polyethylene butyl ester 10-12% glass beads
5% aminosilane
0.1~0.3% Surfactant 0.1~
0.3% thixotropic agent 2-3% leveling agent Others (2) Properties Therefore, the wire of the present invention has a tensile strength 2.3 times that of steel wire, a tensile strength 3.9 times that of copper wire, and the band of the present invention. The tensile strength is 3.9 times that of steel wire and 6.7 times that of copper wire.

Thixotropic agents contribute to the improvement of tensile strength.

Example 3 Example with luster (1) Raw material polyester 91-92% or polyethylene butyl ester half glass beads
5-6% aminosilane
0.4-0.5% surfactant 0.1-
0.4% Leveling agent/slip agent 0.7-0.8%
(2) Characteristics Glossy appearance. The slip agent contributes to the gloss.

"Effects of the Invention" As mentioned above, the present invention is an engineering plastic made of polyester and/or polyethylene butyl ester, glass beads, aminosilane, surfactants, and additives, and is a lightweight alternative material to metals. It has the required properties such as strength and luster, which is stronger than metal, and allows effective use of waste plastic.

The product of the present invention having such excellent properties can be applied to various fields.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a manufacturing process and apparatus according to an embodiment of the present invention, and FIG. 2 is a front view illustrating measurement of bending strength according to the present invention.

Claims (1)

[Claims] (1) Engineering plastics made of polyester and/or polyethylene butyl ester, glass beads, aminosilane, surfactants and additives