What do you need to look for in the foldable pp caps process? The following Xiaobian will tell you about this problem, let's have a look.

1, in the design of extruded plastic bottles, if the material is high-density polyethylene or polypropylene, the cross section of the plastic bottle should be rectangular or oval, for the material is low-density polyethylene or other flexible plastic bottles, the cross section is better to round. This makes it easy to squeeze the contents out of the plastic bottle. The plastic parts used with plastic bottle mouths are mainly bottle caps and sealers. The design of plastic bottle mouth should be emphasized; Considering how to make the mouth of the plastic bottle better fit with the lid and seal at the bottom of the plastic bottle is the weak part of the mechanical properties of the plastic bottle. Therefore, the bottom of the plastic bottle is generally designed to be concave; The corner of the plastic bottle and the inner recess are made of large arc. In order to facilitate the stacking of plastic bottles and increase the stability of the stacking of plastic bottles, the bottom of the plastic bottles should be designed with grooves.

2. When labeling the surface of plastic bottles, the labeling surface should be smooth. A "frame" can be designed on the surface of the plastic bottle, so that the label is accurately positioned and does not move. In blow molding, the first part of the billet blown contact, always tend to be the first hardening part. So the wall thickness there is also larger. The edge and the corner part are the last contact parts of the billet blowing, and the wall thickness of this part is small. Therefore, the edges and corners of the plastic bottle should be designed to be rounded. Changing the surface shape of the plastic bottle, such as the middle of the plastic bottle is relatively thin, and increasing the circumferential groove or rib on the surface of the plastic bottle can improve the stiffness and bending resistance of the plastic bottle. Longitudinal grooves or reinforcing bars can eliminate the deviation, sagging or deformation of plastic bottles under long-term load.

3, the printing surface of plastic bottles is the most concentrated part of consumer attention. The printing surface should be smooth and continuous; If the plastic bottle contains a handle, groove, reinforcement and other structures, the design should be careful not to cause inconvenience to the printing operation. Oval plastic bottle, the rigidity is also higher, but the manufacturing cost of the mold is higher. Therefore, in order to ensure the rigidity of plastic bottles, in addition to selecting materials with high stiffness, the rigidity and load-bearing strength of plastic bottles should be enhanced through the shape design of plastic bottles.

4, because most plastics have notch sensitivity, plastic bottles at sharp corners, the root of the mouth thread, neck and other parts, easy to produce cracks and cracking, so these parts should be designed into rounded corners. For the transfer of the rectangular plastic bottle, it is necessary to support most of the load of the plastic bottle, so the local increase of the wall thickness is also conducive to improving the stiffness and load resistance of the plastic bottle.

foldable pp caps https://www.plasticsproduct.com/Foldable_caps