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what are the applications of double angle circular knives in the plastic products industry
double angle circular blade (double-sided oblique edge circular blade, both sides are ground with oblique angles, v-shaped cutting edge), belongs to the cutting type disc blade, relying on double-sided sharp angles for extrusion cutting, with low cutting resistance and smooth cutting surface. it is specially suitable for high-speed cutting of plastic films, soft plastics, and thin plastic rolls, and is widely used in slitting machines, bag making machines, cutting tables, and rewinding machines.sources：凯发k8官网 | publishdate：2026.08.24
1. cutting of plastic film rolls
pe, pp, pvc, pet, bopp various packaging films, protective films, release films, large mother roll slitting narrow finished rolls.
double angle double-sided oblique blade bi-directional cutting, the film is not easy to stretch, does not fuzz, and does not curl, suitable for high-speed cutting, reducing film tearing and knife edge sticking.
application scenarios: packaging film, mobile phone protective film, electrostatic film, heat shrink film rewinding and slitting process.
2. plastic bag making industry
bag making machine matching, used for cutting edges of finished plastic packaging bags:
pe shopping bags, food bags, composite plastic packaging bags, cut and seal edges, and remove waste materials;
the double-sided oblique blade cut is neat, and the bag opening is not prone to burrs or wire drawing, avoiding plastic shavings from adhering to the product;
high speed continuous production, suitable for continuous feeding and bag making equipment.
3. cutting of adhesive plastic products
plastic substrate tape (pvc electrical tape, pet high-temperature tape, pe foam tape):
cut large rolls of raw materials into small rolls of finished products;
double angle round knife for bi-directional cutting, less prone to compression and deformation, less likely to overflow or stick to the adhesive layer, and the incision is neat.
4. cutting of soft plastic and gasket materials
rubber plastic gasket, foam plastic eva, foam, soft pvc sheet;
cutting thin plastic gaskets and insulating plastic sheets into strips;
soft materials will not be crushed or flattened, ensuring the accuracy of the incision size.
5. cutting of plastic surface materials for labels and stickers
pet and pvc plastic label rolls, rewinding, slitting, die-cutting and matching slitting:
ensure that the cut of the plastic surface material is smooth, without any wire drawing, and prevent the edge of the label from curling up.
6. other plastic processing scenarios
1. cutting of plastic woven bags: pp woven plastic cloth and woven bag blanks are divided into strips, with clean cutting edges to reduce loose threads.
2. non woven composite plastic film: the composite material is cut to deal with multiple layers of composite plastic and prevent interlayer peeling and fuzzing.