Glass bottles and jars are packaging containers for food and beverages and many products, and are widely used. Glass is also a very historical packaging material. With many kinds of packaging materials flooding into the market, glass containers still occupy an important position in beverage packaging, which is inseparable from its packaging characteristics that cannot be replaced by other packaging materials.
Hollow glass products that can be sealed with lids or plugs, and can hold various materials quantitatively. Widely used as packaging containers for beverages, alcohol, chemicals, medicines, stationery and cosmetics. Glass bottles and jars are transparent, easy to clean, have good chemical stability, do not contaminate the contents, have high air tightness, excellent storage performance, rich shapes and decorations, can be recycled many times, and have rich sources of raw materials. However, glass bottles and jars are easily broken and have a large weight-to-volume ratio. These shortcomings are gradually being improved with the development of process technology.
Quality requirements Glass bottles and jars should have certain performance and meet certain quality standards.
① Glass quality: pure and uniform, no defects such as sand, streaks, bubbles, etc. The transparency of colorless glass is high; the color of colored glass is uniform and stable, and it can absorb light energy of a certain wavelength.
②Physical and chemical properties: It has certain chemical stability and does not interact with the contents. With certain shock resistance and mechanical strength, it can withstand heating and cooling processes such as washing and sterilization, as well as withstand filling, storage and transportation, and can remain intact when encountering general internal and external stress, vibration, and impact.
③Moulding quality: maintain a certain capacity, weight and shape, with uniform wall thickness and smooth and flat mouth to ensure convenient filling and good sealing. There are no defects such as distortion, uneven surface, unevenness and cracks.
