PET

The clarity, toughness and barrier properties make PET best suited for its primary market — blow-moulded carbonated soft drinks containers. Speciality grades include flame retardant, impact modified and glass, mineral, carbon, PTFE and mica filled.

Reinforced PET is probably the stiffest of all engineering thermoplastics and has outstanding weatherability and heat resistance.

Outside of the drinks industry, PET is often used for photographic film, recording tape, flexible printed circuit boards, transformer insulation and transparent stationery.

Подпись: All shear strengths are given as guidelines only and may vary considerably depending on grade of plastic, fillers, surface finish, etc. Recycling information = thermoplastic &

Bonding PET with cyanoacrylates often created bonds that were stronger than the PET substrate but some epoxies offered significantly lower strengths (Table 2.10).

Table 2.10 Adhesive shear strengths (PET)

Adhesive type

Description

Shear strength (N/mm2)

Cyanoacrylate

Standard ethyl

>22.1*

Toughened

3.8

Ethyl + primer

>12.1*

Two-part acrylic

MMA

2.4

Polyolefin bonder

3.1

Epoxy

‘5-minute’ epoxy

2.1

Standard epoxy

3.1

Silicone

Alkoxy silicone

1.4

UV acrylic

Visible light cure

7.9

Notes: * Substrate failure

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