Liquid packaging board

Liquid oxygen, 17 754 shipment of, 17 755 Liquid packaging board, 18 130-131 Liquid penetrant testing (PT), in... 

Extrusion coating has been developed to form thin polymer layers on flexible substrates like paper, paper board and metal foils in a high speed process (see Fig. 10) [27, 33, 34]. In combination with paper and paper board, the polymer protects the substrate from moisture, oil and fat. The polymer provides the welding properties to transform, e.g., the paper board/PE substrate into a paper cup, a liquid packaging board or a box for frozen food. 

The liquid packaging board (LPB) consisted of unprinted polyethylene-coated board cut-out waste from the production of milk cartons. 

Products containing less than 10 ppm of DCP are now referred to as Generation 3 PAE wet strength resins. This class of resins meets the strict requirements of residual DCP and CPD levels permitted in some final paper products, such as liquid packaging board (LPB) and tea bag paper. Development of this class of resins was started in the 1990s, and usually involves the application of a post-manufacturing cleaning technique that removes residual DCP and CPD from the product. 

LPB (liquid packaging board) BSSP, UBSSP 280-330 10-15 single 76-86 milk and juice packaging... 

The business area manufactures coated cartonboard at the mill in FrOvi, Sweden. More than half of the production consists of liquid packaging board, the remaining volume being packaging board for food. 

Synthetic wet-strength additives are employed primarily to impart strength to paper when it is wetted. These additives are used during the production of many different paper grades hygiene papers, liquid packaging, labels, coffee filter, tea bag, map paper, currency paper, wall paper, sack grades, carrier board (lettuce box, raisin tray, paper plates] etc. [17, 23]. 

Typical brick-shaped cartons (aptly named briks ) are synonymous with the name of TetraPak and TetraBriks. Laminated board cartons have been available for 70 or more years for liquid products (Figure 9.6). Developed in the dairy market, they are a major packaging format for still drinks some markets are dominated by the single-serve brik and others by the multi-serve version. The other significant factor for these drinks cartons is that the system is available worldwide, making global production of new products much easier. 

Some packages directly enhance consumption or further preparation of the product. Probably, the most famous example is the TV dinner, which allowed meals to go from the freezer to the oven to the table. Later, the metal tray was replaced by a plastic one, permitting even faster food preparation in the microwave oven. Many packages make it easy for us to use the products they contain (e.g., squeezable bottles, reclosable liquid board containers, plastic bottles with handles, and pop-up dispenser tops). 

Ordered polymer films made from poly benzthiazole (PBZT) and poly benzoxazole (PBO) can be used as substrates for multilayer printed circuit boards and advanced interconnects to fill the current need for high speed, high density packaging. Foster-Miller, Inc. has made thin substrates (0.002 in.) using biaxially oriented liquid crystal polymer films processed from nematic solutions. PBZT films were processed and laminated to make a substrate with dielectric constant of 2.8 at 1 MHz, and a controllable CTE of 3 to 7 ppm/°C. The films were evaluated for use in multilayer boards (MLBs) which require thin interconnect substrates with uniform controllable coefficient of thermal expansion (CTE), excellent dielectric properties, low moisture absorption, high temperature capability, and simple reliable processing methods. We found that ordered polymer films surpass the limitations of fiber reinforced resins and meet the requirements of future chip-to-chip interconnection. 

In this section we discuss three applications of electrically conductive adhesives die attach adhesives, anisotropically conductive adhesives for liquid crystal display (LCD) assembly, and conductive adhesives for surface-mounted assembly of packaged components on printed wiring boards (PWBs). These applications were selected based on overall... 

A combination of a polymer layer with a board is used to package liquids such as milk, where the plastic layer provides the barrier to contain the milk within the package and the board the basic strength. Where it is necessary to store the beverage for long periods, such as fruit juices, additional barrier properties are required to prevent permeation of oxygen into the food product. To achieve this additional protection, an aluminum layer is incorporated within a plastic/board composite. 

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