Many consumers have encountered such a situation: open PET beverage bottles and found a dark bottle with visible mold, it is disgusting. How to improve the mouth of pollution in the study, this paper obtained the national patents improvement program.
Existing bottle with a threaded resealable plastic beverage bottles, the main material is PET, bottle mainly HDPE, location are sealed bottle top, and according to the size of the pressure bottle were taken in different gasket, sealing ring, sealing ring inside the plug or seal in combination with the seal of the sealing plug within the form, which sealed the different forms of performance only to improve the sealing effect.
Position as only the bottle sealed, threaded part is not sealed, from production to consumer consumption of the process, many factors will result in polluting part of bottle thread, such as nutritious beverages in the beverage filling process splash to the bottle screw part, the role of bacteria and air, the mouth of the bottle thread appear moldy, the phenomenon of the accumulation of stain; or adverse environmental transport and storage will lead to a clean bottle thread pollution, such as selling drinks on the ice when the long-term water.
Many consumers will experience open bottle after bottle thread Department found dirt, because bottle has been opened, complaints of limited, had nothing with this. From the drinking habits of view, most consumers drink
Plastic bottled drinks are not straw when it is included directly in the mouth bottle, with screw Department of pollutants will enter the body, this phenomenon is especially true in children.
In fact, many beverage manufacturers have to face this problem, but also adopt various methods to solve, such as control filling volume and reduce the filling to cover delivery of the shock, before capping the bottle washing, etc. However, the problem still occurs, and the various methods currently can not be solved, such as hot filling and overflow level required mouthful is a contradiction. Such defective products sometimes more than 1%, the manufacturer often because of this problem within recovery of product, while in the process of transportation and sale of pollution are difficult to control and ultimately flow to the hands of the consumer products are many complaints about seriously affect the product’s reputation.
Defect analysis from the above view, the problem is not sealed bottle screw part, from the market looking for food packaging, consumers have some protection to the parts of the design of direct contact, such as eight-treasure porridge on the plastic cover, but the outside packaging is added, the sealing effect of the general, but also costs more, in the plastic beverage bottle has no such protective packaging. Then there would not be a simple and cost too much packaging? We propose a practical and feasible.
Principle from the sealing point of view, the above-mentioned sealed plastic beverage bottles are mainly two types in the top cap gasket, sealing gasket has a shape and added (2 cover), with second within the sealed bottle plug. Gasket by bottle to the top of the gasket seal from the role of the extrusion deformation; in Cyprus relies on the external diameter of the inner diameter of the interference with the bottle sealed with the role play. Due to different principles, gasket cap can withstand a large bottle pressure, present a variety of beverages in plastic bottles are used, inside the plug cap on the number of relatively high pressure with no or less in the bottle beverage varieties such as hot-fill beverage most current, within the plug with its sealing diameter and inner diameter with the bottle, the material within the plug.
See from the production process, within the plug cap process is simple, low cost, small changes to re-tighten the seal, so widely used in non-carbonated beverages. Principles of its seal, the seal and the cap is not the final tightening torque between the actual production of capping the final tightening torque required only to prevent accidental lid back loose. Therefore, we can by improving the sealing plug within the mouth of the bottle to get the required thread seal.
The above-mentioned principle of the two seal species in the structure are used to, drink bottle with the bottom sealed bottle male boss, cap and seal within the wall forming the contact surface of convex sets coincide, and in The contact surface with air sealing rings, gas cap seal ring with one injection