What is regrind used for?
A significant part of optimizing resin usage is proper use of regrind. Regrind is material that has undergone at least one processing method such as molding or extrusion and the subsequent sprue, runners, flash, rejected parts etc are ground or chopped.
What is regrind resin?
Regrind, also referred to as reprocessed or utility, is any recaptured scrap resin resulting from the manufacturing process. For example, rejected parts and production scrap are two of the main sources of regrind.
What is plastic regrind used for?
Regrind plastic reduces the need for virgin resin production which eventually increases the availability of fossil fuels. Recycled and reused plastic costs lesser than virgin resins. During granulation or palletization, the plastic scrap is mixed with a small portion of virgin resin to regain its properties.
How much is plastic regrind worth?
The true cost of regrind…
| Cost of Regrind per Pound | |
|---|---|
| Material Cost | $0.75 |
| Labor / Processing | $0.35 |
| Machine Depreciation | $0.10 |
| Regrind Value | ($0.35) |
Can you regrind polycarbonate?
Clear polycarbonate regrind can be used, but it is important to note that regrind use can affect part clarity, which in optical applications is a critical component.
What is regrind PVC?
accomplished by grinding or pulverizing a PVC product and reprocessing it into the same or other products. Since the heat history of PVC is additive with respect to its thermal stability (1). Rather, ground PVC product (“regrind) is generally re-extruded by itself or in a mixture with virgin compounds.
What is regrind in injection molding?
Regrind is material that has been processed at least once before, with the sprue, scrap, etc. subsequently ground or chopped. Note that even what most consider “virgin” resin may have one or more processing histories, as it was compounded and pelletized when made.
What is the GST rate for plastic scrap?
5%
HSN Code 3915: Waste, parings and scrap, of plastics
| HS Code | Description | GST% |
|---|---|---|
| 39153010 | WASTE PARINGS AND SCRAP OF CO P.V.C. | 5% |
| 39153090 | OTHER WASTE PARINGS AND SCRAP OF P.V.C. | 5% |
| 39159010 | WASTE PARINGS AND SCRAP OF POLYPROPYLENE | 5% |
| 39159021 | WASTE SCRAP OF COPOLYMERS OF VINYL ACETATE | 5% |
What is regrind percentage?
What is a good ratio of regrind to virgin to use? Generally, the molding community targets 20 to 25 percent or less for blending regrind into virgin resin, though one can see everything from 100 percent virgin to 100 percent regrind during production.
Can you regrind glass filled nylon?
Regrinding glass filled nylon creates obvious handling and processing problems (i.e. static, dust, and water absorption). Two separate material forms, fines and heavies characterize the regrind. Fines defined by Webster’s Dictionary are very small particles in a mixture of various sizes (1).
Should I use 100% regrind or virgin resin?
So, instead of blending regrind with virgin and encountering all the above problems, evaluate using 100% regrind. Store the regrind until all the virgin resin is consumed. Then feed regrind at 100%, after removing fines.
What are the disadvantages of Resin/regrind?
Other resin/regrind complications can be loss or consumption of additives, such as mold release, antioxidants, acid scavengers, and antistatic agents during previous heat histories, along with color degradation, fiber-length reduction, over-drying etc. WHAT LEVELS CAN BE USED?
Does regrind remove first-pass material?
Experts argue that after each pass through the machine, the amount of first-pass material that remains in the regrind becomes less and less, but it is never completely removed unless the entire regrind system is purged and restarted.
How do I get the most production from my resin?
Getting the most production from your purchase of resin requires appropriate use and care of regrind. To start, let us define “regrind” to be sure we all are on the same page, as there is no standard definition.