Recycled PET replaces PBT in automotive connector applications

AOC builds up fire retardant resin range ALPHA/OWENS

CORN-

requiring

flame

capability

with high corro-

This

retardant

resin,

which

sion resistance, thermal stability and good mechanical

ricators. Two are flame-retardant resins an epoxy

properties. Semiconductor chip manufacturers, for

vinyl ester and a proprietary general purpose resin respec-

example, require composite fume ducts having this com-

addition, enhanced

tively under

bination

ester optimized

both marketed the name Firepel.

Another

is an isophthalic

polyester suitable taining petroleum the fourth engineered resistance.

for confuels and

is a vinyl ester for high impact

as fan housings assemblies. The

of properties.

third

and blade

or unsaturated resins

line

F 764, isophthalic

is an poly-

for storing

Plastics,

November 1997). Completing the newly launched

product

polyester

(Reinforced

AOC

quartet

elongation

and impact prop-

erties to the strength, corrosion resistance and thermal

new grades of petrol/gasoline fuels designed for low emis-

stability

of lower cost resins, relying

sion

vinyl ester chemistry.

on undisclosed chemistry to achieve Class 1, 2 or 3 flame

highly

Developed to meet increasingly stringent US fire safety regulations, the new Firepel resins meet

purpose properties at general-purpose pricing for appli-

ASTM-84 flame spread ratings. Adding small percent-

cations that do not require high levels of corrosion resis-

ages of antimony

F 764

crosslinked

is a

isopoly-

ester designed to be effective in containing oxygenated fuel blends comprising

spread ness

petrol

with added ethanol,

methanol and/or methyl tertiary butyl ether (MTBE).

enables resins to achieve a Class 1 rating and, in some

tance. These

two resins

another

member

cases, the rating can be achieved without additive.

Firepel family, K 299 FR, a bisphenol-A unsaturated

K 022 FR epoxy vinyl ester is for applications

polyester recently introduced for industrial applications.

joins of

burning.

associated

with F 016

can be used as a bonding enhancer

to improve

adhe-

sion between laminate layers or as a matrix in composites engineered for high impact resistance. According to Stephens, “The addition of these mate-

On-going AOC tests show that the resin, in which purified isophthalic acid is a key

rials to our product line makes it easier for composite

component,

fabricators

performs

than non-isopropyl

the

is

F 0 16 elastomer-modified vinyl ester which adds high

K 829 FR is claimed to be a revolutionary new series

ratings. AOC busimanager Reagan Stephens says that these products provide general

trioxide

is easily

processed, has so far been employed for products such

ING (AOC) has launched four new resins for open mould reinforced plastic fab-

better

resins in

fuel storage applications. The material would be used in underground storage tank liners and is less expensive, says AOC,

than vinyl ester

and distributors

to rely on AOC as a single source for all their resin needs.”

AOC; tel: + l-901 -8542800; fax: + l-901 -8_541183.

Recycled PET replaces PBT in automotive connector applications A

THERMOPLASTIC

resin produced recycled

entirely from polyethylene

terephthalate

(PET)

promise

a

as

replacement

tance, and superior electrical

are believed to have been the

forcements,

properties.

first

ers, paintable

High

good warp resistance

shows

potential

to fabricators. cost advantages.

for materials

The latest Petra 130 vari-

electrical connectors.

that it compares

polyesters

as

Petra

by

shown

in tests

well with stands

a good

selected in preference

(PBT)

commonly

connectors.

to the

terephthalate used in

Petra 130, a 30%

glass fibre reinforced of PET,

is claimed

grade to offer

chance

established addition

material.

resin and therefore tribute ductivity

objectives

ers (OEMs) .

higher melting chemical

environ-

of origi-

manufactur-

better

Petra recycled resins have

and thermal

resis-

been around since 1982 and

end-use

These that load,

must stabil-

as well as above

or in the presence of

moisture.

Certain

favoured

for

are joined

cally

by snap fit, threading

Automotive include

grades are

thin

which

; iln

include

temperatures

110°C

or

resins a spec-

dimensional

ity under at

virgin across

and mechanical

components

In

success-

tough

maintain

point,

Reinforced Plastics January 1998

of

to the

to the cost and pro-

nal equipment

with a

trum

car

AlliedSignal

against

being

mentally friendly, it can con-

than

together

of

to being a recycled

higher strength and stiffness PBT,

fully

and metals

structural

now

Plastics are said

alternative

manu-facturer.

connectors,

a high

mance

resins

to a major

applications.

to provide polybutylene

delivered

PBT when used in electrical

AlliedSignal

perfor-

post-consumer

says they compete

ant, having

marketed

appeal

It also has

currently used in automotive Thermoplastic

flow and

parts

mechaniforce

fit

methods. applications

grille opening

rein-

headlamp

carri-

door handle

escutcheons,

roof racks and

under-bonnet

carburetor

and ignition components. All grades are reinforced with glass or a combination of glass and selected mineral fibres.

Glass/mineral

grades

offer a balance

of engineer-

ing properties

combined

with low warpage and resistance

to sink mark forma-

tion.

Certain

glass

rein-

forced grades engineered flame

retardant

combine

performance

an all-colour

for

properties with

UL VO flam-

mability rating.

AlliedSignaL Plastics; tel: +32-1639-1230; fm: +3216mm39.