Collapsible metal tubes

An alternative approach involving a master manual which contains the basic features for a selected type of component, i.e. glass bottles, plastic bottles, collapsible metal tubes, etc., has much to recommend it. This, together with a simpler description-type document, then becomes an agreement specification between the supplier and the user. 

Figure 10.2 Collapsible metal tubes produced by impact extrusion...

Collapsible metal tubes are used extensively for packaging a wide range of pharmaceutical and cosmetic creams, pastes, ointments, jellies and semi-liquids. 

After fabrication, e.g. two-piece metal cans, glass and plastic containers, collapsible metal tubes. Containers are manufactured and then printed or decorated by a secondary process. Since material and container shape impose certain restrictions, i.e. process used, design limitations, etc. some fabricated containers may use labels, printed sleeving, etc. rather than a direct decoration/printing process. 

Having set a base line for some 50 years ago, what was the state of packaging art up to yesteryear Glass and corks were supported by metal cans and tins, metal screw caps, thermoset caps, paperboard boxes and cartons, glassine and waxed papers, composite paper board containers, glass ampoules and cartridge tubes, collapsible metal tubes and the Aspro waxed paper strip. 

Collapsible tubes or in tight containers Collapsible, lined metal tubes... 

Semi-solid products have been traditionally packed in collapsible tin tubes. Metal tubes are a potential source of metal particles in ophthalmic products, and so the tubes have to be cleaned carefully prior to sterilisation. Also, the final product must meet limits for the number of metal particles found. Plastic tubes are not suitable because of their non-collapsible nature, which causes air to enter the tube after withdrawal of each dose. However, collapsible tubes made from laminates of plastic, aluminium foil and paper are a good alternative to tin tubes. Laminated tubes fitted with polypropylene caps can be sterilised by autoclaving, whereas tubes fitted with polyethylene caps are sterilised by gamma irradiation. The tubes are usually filled aseptically, sealed with an adhesive and then crimped. 

The development of technologies for the widespread distribution of the new colours. The introduction of collapsible metal paint tubes in the 1840s enabled paints to be taken outside the studio, whilst machinegrinding of pigments and the use of fillers enabled finer-hued pigments to be reliably produced (see Bomfield et al., 1990). 

Aluminium bicycle frames are being successfully bonded with epoxy adhesives [20, 21] to replace traditional brazing methods. A process developed by the Raleigh Cycle Company and Permabond International utilised a Permabond epoxy adhesive to bond aluminium alloy frame tubes to steel lugs and stays. After heat curing, these frames withstood a minimum 55 MPa tensile strength test. The metal tube usually collapsed before the bond failed. 

To ease part removal, mandrels may be constructed from water-soluble materials (sand), plaster, or an assemblage of metal shells that is collapsible or segmented [6], Tube mandrels constructed with a high-quality surface finish and a slight taper are often used for cylindrical parts. 

Dry offset is used to decorate drawn and ironed metal cans, round plastic tubs and plastic or metal collapsible tubes.23... 

Metals Metals are used as collapsible tubes and in aerosol containers. The most common metals in use are tin, aluminum, and lead. Tin is the most expensive, while lead is the cheapest. Laminates of tin-coated lead provide the appearance and oxidation resistance of straight tin at lower prices [89]. Tin is the most chemically inert of all collapsible tube metals. It offers a good appearance and compatibility with a wide range of products. Aluminum tubes provide the attractiveness of tin at relatively lower cost. Lead has the lowest cost of all tube metals and is widely used for nonfood products such as adhesives. However, with internal linings, lead tubes are used for such products as fluoride toothpaste. If the product is not compatible with bare metal, the interior can be flushed with wax-type formulations or with resin solutions. 

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