Paper bonding

In a variant of the horizontal form/fill/seal operation, the material, moving in a horizontal direction, is folded on itself vertically. Vertical sections of the two faces are heat-sealed to each other to form a pouch, which may then be filled. The pouch, usually made from film or paper bonded to aluminum foil plus a plastic laminant and heat sealant, is closed by a heat seal. This type of pouch gives high moisture and oxygen protection and is used for moisture-and flavor-sensitive condiments and beverage mixes. 

Bartos, P. (1981). Review paper Bond in fiber reinforced cements and concrete. Intern. J. Cement Composites 3, 159-177. 

In Fig. IB are shown the structures of the main steroid sex hormones of the three classes currently recognized. In each case there is good evidence that the compound is the main secretory product of its class. In Fig. 1C are shown three typical major metabolites of the first two classes. In these structures another convention is apparent. The nucleus is considered as lying more or less in the plane of the paper bonds directed toward the reader or above the paper are drawn as dashed lines and are designated a those away from the reader or below the paper are drawn as solid lines and designated An excellent account of these and other stereochemical features of the steroids will be found in Klyne s monograph (K9). 

Although in recent years animal glues have been replaced substantially by the newer synthetic adhesives, particularly the vinyl and acrylic emulsions, large quantities are still sold in dry and stable liquid forms for furniture assembly or repair and paper bonding applications. 

These elements can accommodate more than eight electrons in their valence shells and therefore can form more than four covalent bonds. Examples are compounds such as PCI5 and SFe. Bonds written as (dashed wedges) project behind the plane of the paper. Bonds written as (solid wedges) project in front of the paper. 

Substance n. The weight in pounds of a ream (500 sheets) of paper cut to the standard size (17x22) for business papers (bond, ledger, mimeograph, duplicator, and manifold). For example, 20 lb. Similar to basis weight of other grades of paper. 

The core is a honeycomb construction consisting of a Nomex base paper bonded together with stripes of phenol formaldehyde (PF) resin adhesive and, after expansion, impregnated with a PF resin. 

Bartos, P. (1981) Review paper bond in fibre reinforced cements and concretes , International Journal of Cement Composites Lightweight Concrete, 3(3) 159-77. 

Bond in plane of paper Bond projecting into the paper Bond projecting out of the paper... 

Writing papers are used almost exclusively for manual writing. They are super-calendered and can contain varying amounts of rags. This group also includes handmade papers, moldmade papers, bond, and air mail papers. 

Most standards for paper bonding adhesives are under the jurisdiction of TAPPI or related organizations. See ASTM s two durability tests for paper bonding adhesives, D-1581 and D-1713 in the earlier listing under paper adhesive specifications. 

Most tests for paper bonding adhesives have been developed by TAPPI and published by them in Testing Adhesives, by R. G. Meese (see Appendix 1). 

ASTM tests for strength of paper bonding adhesives. 

ASTM tests for durability of paper bonding adhesives. D-1581. Test Method for Bonding Permanency of Water-or Solvent-Soluble Liquid Adhesives for Labeling Glass Bottles. ... 

Vinyl emulsions for wood and paper bonding have open times from 30 sec to several minutes. 

In a recent paper. Bond listed a number of interesting controversial examples of co-crystals [81]. For example, dioxane, C4H8O2, forms isostructural 1 1 two-component crystals with I2, Br2 or CI2, which at room temperature and 1 bar pressure are solid, liquid, and gas, respectively [82-84]. Clearly a distinction based on the aggregation state of one component has little significance. 

A quick search online or via textbooks in the library shows that there are many types of adhesives available to use, ranging in type from simple paper bonding adhesives to high performance aerospace materials. Indeed if the reader considers the fact that some adhesives will be sold under license to different supphers or will be based upon common formulations, then there are probably hundreds if not thousands of products available worldwide. The situation is complicated further by the fact that the same adhesives can often be classified in several different ways, see Chap. 12. The main ones being ... 

A diy-strength additive should be water-soluble pol nner, preferably a cationic one, and should be able to form hydrogen bonds. Actually, wood fibers contain their own dry-strength additive— hemicelluloses. It is well known that the hemicelluloses contribute to the development of paper bonding properties. 

Bond to Robert M. Labaree, March 20, 1935, Julia W. Bond Papers Bond to Frederick L. Allen, March 13,1935, part 2, reel 30, Bond Papers. 

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