Viewing a single comment thread. View all comments

johnnymetoo t1_j2ccocg wrote

Reply to comment by mimprocesstech in [OC] Weekly Plastic and Metallic waste from a 150 Seat Diner (lbs) by Hi_its_GOD

Are the ketchup packets made of LDPE?

12

mimprocesstech t1_j2cdxw4 wrote

Most are yes, along with a foil liner that prevents their recycling, but helps preserve the ketchup or something.

23

newaccountzuerich t1_j2cxglm wrote

The foil layer is an oxygen-impermeable layer.

Thin plastics can slowly allow gases to cross, and without the foil layer the shelf life of the contents would be reduced.

12

Saxonbrun t1_j2deg3p wrote

Additionally the acidity of ketchup will eat through most plastic. Ketchup bottles are made of PET which isn't affected by the acidity, along with a small amount of EVOH to serve as an oxygen barrier to prevent spoilage.

7