JPS6056548A - Composite plastic sheet - 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 provides an antistatic material in which a film or sheet of a polystyrene resin containing an alkyl amine/stone anti-stone IF agent is laminated on one or both sides of a polystyrene resin sheet base by coextrusion. It has excellent mechanical properties, rigidity, impact resistance, transparency 1/1 mm, etc., and is suitable for packaging IC products (to prevent staining due to adsorption of slag). Concerning surface band +17 city-proof multi-storey plastic sheet.

In general, polystyrene-based or A, BS-based resins are easily charged due to their high surface resistivity.
Destroys the function of Ic. In addition, staining of dental products due to adsorption of lumps will reduce the product filli value,
Various methods have been proposed to improve consumers' purchasing habits by reducing their desire for food.

For example, (1) a method of applying an antistatic agent to the surface of packaging containers and plastic products;

(2) Method of applying conductive paint.

(3) There are methods of kneading conductive materials such as carbon black, metal fillers, or antistatic agents.

However, method (1) shows an antistatic effect immediately after application, but during a long period of 1 fJ month, the moisture VC
This is not a preferred method because the antistatic agent may be removed by friction on the surface if it flows out, and the antistatic effect will be lost.

Method (2) uses a resin that is safe for adhesion to the base resin, and is prone to uneven coating and is vulnerable to friction on long surfaces, causing the surface layer to peel off and lose its antistatic effect. In addition, there is a risk of fire due to peeling off pieces, so this is an unsuitable method.

On the other hand, in method (3), if carbon black or metal filler kumquat is used, it is a very effective method because of the sustainability of the antistatic effect and the surface resistivity value, but the sheet is black or gray. 1. There are restrictions on appearance due to the fact that the product is transparent, and there is no need to meet the requirements for transparency necessary to see the contents. It was something that didn't exist.

Also, 'if'! In the case of antistatic agents, VC may not have sufficient antistatic effect if the antistatic agent is anionic or non-alkylamine-based, or even if it is anionic or alkylamine-based, if the additive liquid is small, the antistatic effect may not be sufficient. First, when adding anionic or alkylamine-based agents at 1°C, molding is difficult, and the mechanical strength and impact resistance of the resulting fake containers and plastic products deteriorate. When using an anionic antistatic agent that is extremely low and impractical, (even if a highly transparent surface layer resin such as 111 resin is used, the anionic antistatic agent will cause clouding). , demands for transparency could not be met.

This book has solved these drawbacks, and uses a polystyrene-based resin as a gold base material, and has an argylamine base band on one or both sides of the base material as an inhibitor. By laminating a styrene-based resin band and barrier layer using a coextrusion method, extrusion of the alkylamine-based antistatic agent-proprietary resin can be stabilized, and it has excellent suitability for secondary processing, and furthermore,
1. Excellent mechanical strength and impact resistance of N-saku sheet,
, maintains sufficient antistatic effect for a long time. Furthermore, the present invention aims to provide a surface band rust-resistant, dz, and t-sealed plastic sheet that can meet the requirements for transparency.

That is, the present invention provides an alkyl-rmine antistatic agent (
r O, 2 to 6 layers with 1 stop S 1. Moreover, it is made by integrally laminating polystyrene film or sheet metal co-extruded with a surface resistivity value of 1012Ω or less and a bone stiffness of 20 or less! Let it be fF.

The Honmoto Meikan will be explained in more detail below.

+l of the base material used in the present invention and the two layers of belt protection 11? l Styrenic hydrocarbons are 50 to 90% as styrene fat.
A block copolymer resin consisting of 50-10% by weight of a conjugated diene hydrocarbon and a mixture of L and general purpose polystyrene, impact-resistant polystyrene, or methacrylonitrile-detazoene-styrene. The so-called MBS resin, which is mainly made of three components and wood, is used.
l,ru.

In addition, styrenic hydrocarbon-conjugated diene thread hydrocarbon block co-association resin refers to the general structure formula (X-Y)n or (X-Y)n-X (xt is a polymer block of styrene hydrocarbon. , Y is a polymer block of a conjugated diene hydrocarbon, and n is not an integer of IE). Mata block it/J
As for construction, even a complete block is JP-A-48-48546.
As can be seen in the above issue, the transition part between the Zorokumata and the block Y may contain an XY random coelectric material k:J-N'L, or the so-called Taber Y+block structure 1 blue il, or styrenic hydrocarbon. and (J:, styrene, α-methylstyrene, p-methylsburene, etc., and conjugated diene hydrocarbons include butadiene, iso7゜lene, etc.). f: To produce, 1), ~ ion light is an initiator, especially for organic lithiation agents and proboscis 1 agents (~, a method of stepwise polymerization of both hydrocarbons, both monoliths) can be prepared by co-coating a mixture of (1) and (1) in an inert solvent, or by using a suitable combination of (1) and (1).

Resin C used for straw material may have the same size as the obiichi-boichi layer, and is also used to improve the extrusion gamma dynamic characteristics with the antistatic layer, and to improve the IJ ratio of light and heavy sheets. Additives and coloring agents can be added in an amount of +Yi %, and scraps of the antistatic layer can also be added to an extent that does not significantly reduce performance such as mechanical strength and transparency.

In the antistatic layer of the present invention, the physical properties such as mechanical strength, rigidity, and impact resistance can be provided by the resin 11R layer of the base material. Part 1. I was charged Jl.

It is important to match 61 + 1 h to the base material during extrusion processing, and to ensure sufficient adhesion to the base material.

For this purpose, for the antistatic layer, known means are used such as adding additives such as γJlr, paraffin, other mineral oils, various IF agents, and adding other resin components. be able to.

The argylamine-based antistatic agent used in the present invention is an amine compound having a hydroxyethyl base having a linear formula.

(However, 1 (1 is an argyl group or alkenyl Jfi having 8 to 22 carbon atoms, and In and 11 are f'
This compound is well known as an antistatic agent, and L is preferably in the range of 2≦m+n≦10.

Typical amine compounds with hydroxyethyl groups are:
These include N,N-bis(2-hydroxyethyl) tallow amine, polyoxyethylene laurylamine, and fatty acid esters of polyoxyethylene laurylamine, among which N,N-bis(2-hydroxyethyl) tallow amine is particularly preferred. good. The amount of the antistatic agent added is 0.2 to 6 weight percent, preferably 1 to 6 weight percent; if it is less than 0.2 weight percent, the surface resistivity value of the antistatic layer increases, so that Ic If it exceeds 6% by weight, extrusion processing becomes difficult due to increased slipperiness, which impairs the performance necessary for packaging products and preventing stains due to the adsorption of #deposit. The characteristic values decrease, and problems such as pleasing (stickiness of the surface due to excessive leaching of the antistatic agent) and pluming (blowing of whitening powder due to excessive leaching of the antistatic agent) occur.

Next, to manufacture the product of the present invention, first, the polystyrene resin and argylamine antistatic agent used for the antistatic layer are mixed in a Panbury mixer, a co-kneader, a single-screw extruder,
Kneaded by various mixers such as shaft extruders or extruders -C
A total of 11C of the base material and a total of 11C (7jIII? fr) of the base material and 2
Either extrude and laminate the antistatic layer and the antistatic layer from a layer die or a six-layer die, or supply each 4g1 fat to an annular flow path attached between a part of the extruder cylinder and the c-layer die to form an annular layer. θ
1 [In the road, bond layer 1i' (] (Extruded and integrated from Idai.

The extrusion coloring temperature is 170-30 (4α of J″C)
It is appropriate to use υ, this ttrl 1 river 11 + ΣIJ1
1 to 1 + 1+++ Q, the molding could not be carried out sufficiently, ii'f, I I++A 1110, there was a risk of resin loss and antistatic agent volatilization i1. There is.

Using this coextrusion method, I++ et al.] 1. In addition, the overall wall thickness of the surface antistatic plastic sheet 1 of the invention is 0.1-3.0 mm, preferably 0.2-2.0 mm.
LI r8m J'1 degree, and the wall thickness should not be less than 0.1 mm, the strength as a package/dedicated device will be insufficient, and if it exceeds 6.0 mm, it will be difficult to perform compressed air or vacuum forming. .

Also, the thickness of the surface antistatic layer is 2 to 7 times the total thickness.
If the wall thickness is less than 2 inches, it will be difficult to form a film during extrusion, and if it exceeds 70%, it will be difficult to form a film during the secondary processing of the sheet. Also, the mechanical strength and strength of the culm are reduced.

Hereinafter, the present invention will be explained in detail based on (1) and (1).

Examples 1-2 Styrene-butadiene block copolymerization, lft4 visit:
"Denka Clearene 75 (1L Kamekikagaku Shiba ((→
Made.

The product name is ``Electro Stripper E'', and the antistatic agent is ``Electro Stripper E''.
A: Using "Kao Soap 1 Quickly Made, Product Name", mix it with the composition shown in the table, and apply the mixture to a 40maφ vent type 2.
It was pelletized using a screw extruder.

This was mixed with 65 tnr of Zoroku Co-Jigukura resin similar to the supply prevention layer of the extruder (L/D = 24) with 4011 door diameter.
The mixture was supplied to the extruder through the supply port of an lφ extruder (L/D = 25), melted, and supplied to the core layer of the three-layer sheet die.

The die has multiple manifolds, and after exiting the manifold and before the lip, the die is 11p with 4"J of fat.

Gui's IIJ (d: 600 mm, Ritsu-11, J,
1.0111111, and as a result, the antistatic layer b [J, Ll 5 mm, Jα normal block joint resin layer 0.4 mm, the total sheet thickness 0.5 mm.
A three-layer sheet was obtained.

The force C between the band 1 barrier layer and the ordinary block copolymer resin layer of the obtained three-layer sheet was sufficient to prevent peeling.
It was impossible to do so.

This sheet is shown in the table, rII! J, Surface specific resistance value and mechanical strength 1)
.

It was soon a powerful thing.

In addition, using this sheet, the surface resistivity value is sufficiently low, and the internal parts can be sufficiently identified, and the ``O'' character can be clearly seen.
f1: Immediately) Another molded product was made.

Execution 1 Nri 6 to 4 For the block co-electrode of Execution 19-1, methacrylonitrile-butazoene-styrene co-jlt coalescence (Ml) was used instead of resin.
13S resin)
ux, +i, manufactured by Kikagaku Kogyo 0, product name", was removed to Obitonbo 1. The same operation as in Example 1 was performed. As shown in the table, the physical property measurement results are immediate in terms of surface resistivity, mechanical strength, and excellent performance!
1-I am.

Comparative Examples 1-2 Electrostripper EAO was used as a stripping inhibitor.
Instead, amphoteric tl'V inhibitors, rchemistra) 1
100: Sanyo Chemical (Other than using (manufactured by 9, product name),
Same as Example 1 1>i,! Meat size ψ0.5m
m sheets were obtained.

As shown in the table, the surface resistivity and physical properties of this sheet showed large values for the surface ratio and Ut resistance value.

Comparison rows 6 to 4 The same conditions as in Example 1 were used, except that electrostripper FA was added as an antistatic agent, and special yF was added by hand at twice the upper limit of the claim range and lower limit M. Five sheets were obtained.

As shown in the table, the surface resistivity of this sheet was measured in one direction and the physical properties were determined. As shown in the table, the surface resistivity value was large or the transparency was decreased.

Comparative Example 5 The same conditions as in Example 6 were used, except that an amphoteric antistatic agent "Chemistat 1100: manufactured by Sanyo Chemical ■, trade name" was used instead of Electrostripper ■i:A as the antistatic agent. A sheet with a wall thickness U=5 was obtained. As shown in the table, the physical property measurement results are surface ratio! A sheet with a wall thickness of IJ and 5+++m was obtained under the same conditions as in Example 6, except that 1j was set to φ. The physical property measurement results shown in the table show that J9 has a large surface resistivity value.

Comparative Example 7 [Electrostripper IuA as IL inhibitor]
A sheet with a wall thickness of 0.5 mm was obtained under the same conditions as in Example 1, except that an anionic anti-rust agent [Electro Stripper Pc; Kao Soap (manufactured by 11N, trade name)] was used instead. The physical property measurement results shown in the table lack transparency.

In addition, the method for determining the I-nasal nature in Examples and Comparative Examples was as follows.

1. Surface resistivity value: JIS-6911: 2, Tensile strength: JIS-K-6734: 7tf-6,
Folding strength JIS-P-8115 4, Falling weight impact JIS-7211 5, Total transmittance JIS-K-67146, Cloudy p
degrees, rrs −K = 671411♀Applicant
Electrochemistry Engineers Co., Ltd. Kano 261-

Claims (1)

[Claims] On one or both sides of the polystyrene resin sheet base material,
Alkylamine antistatic agent'f: (J, contains 2 to 6 heavy atoms, and has a surface specific resistance of 4)'C value of 1012Ω
Polystyrene type with a haze of 20 or less