摘要:
An automatic vent has a cup including a bottom wall, a side wall, an open top, and an inlet for introducing fluid into a compartment defined by the bottom and side walls. A valve assembly of the automatic vent includes a cap disposed over the open top of the cup. The cap has a body with an upwardly facing surface, a downwardly facing surface, a bore formed within the body for enabling fluid communication between the compartment and atmosphere, and an annular rim provided around the bore on the downwardly facing surface. A lever arm is hingedly connected at one end thereof to the body of the cap adjacent the annular rim. The automatic vent further includes a multi-hinged connection for hingedly moving the lever arm between a closed position in which the lever arm blocks the bore of the cap in response to the fluid level in the compartment rising above a predetermined fluid level, a partially open position in which the lever arm hingedly moves away from the cap but still engages the annular rim to allow gas to escape through the bore in response to the fluid level in the compartment lowering below the predetermined fluid level as a result of gas build up within the compartment, and an open position in which the lever arm hingedly moves away from the cap and annular rim in response to the fluid level in the compartment lowering substantially below the predetermined level.
摘要:
A composition for surface treatment of paper which includes a nanoparticle fraction, and a carrier fraction for detaining the nanoparticles in the surface layer. The carrier fraction includes plate-like pigment particles, and at least one binder. The invention also relates to the method of manufacturing the composition and to its use.
摘要:
A water-soluble methyl cellulose ether, having a flocculation point below 100° C., is manufactured by reacting methyl chloride and a cellulose activated by mercerizing the cellulose with aqueous alkali in the presence of a C2-C3 alkyl chloride as a reaction medium at a temperature from 65° C. to 90° C. and at a pressure from 3 to 15 bar. The weight ratio between the cellulose and the C2-C3 alkyl chloride is normally from 1:1 to 1:5. The use of the reaction medium makes it possible to produce at a low pressure methyl cellulose ether at a good rate.
摘要:
An additive for paper or board production e.g. for decreasing pitch problems. The additive includes at least a component including fatty acid glycerides, preferably triglycerides, comprising a high percentage of unsaturated, preferably polyunsaturated, fatty acids. Raw or partly polymerized plant oil, such as sunflower oil, may be used.
摘要:
An internal size and a method for sizing board, such as liquid packaging board, with a hydrophobising internal size containing oxetanon derivative or 2-oxetanon. The main part of the hydrocarbon chains R′ and R″ of the oxetanon derivative or 2-oxetanon are derived from linear fatty acids, and ≦20 w-%, typically 2 to 15 w-%, most typically 5 to 12 w-% of the hydrocarbon chains are derived from branched and mainly saturated fatty acids.
摘要:
A water-soluble methyl cellulose ether, having a flocculation point below 100° C., is manufactured by reacting methyl chloride and a cellulose activated by mercerising the cellulose with aqueous alkali in the presence of a C2-C3 alkyl chloride as a reaction medium at a temperature from 65° C. to 90° C. and at a pressure from 3 to 15 bar. The weight ratio between the cellulose and the C2-C3 alkyl chloride is normally from 1:1 to 1:5. The use of the reaction medium makes it possible to produce at a low pressure methyl cellulose ether at a good rate.
摘要翻译:絮凝点低于100℃的水溶性甲基纤维素醚是通过使甲基氯和纤维素与碱水溶液活化的纤维素在C 2 - C 3 N 3烷基氯作为反应介质,在65℃至90℃的温度和3至15巴的压力下进行。 纤维素与C 2 -C 3烷基氯化物的重量比通常为1:1至1:5。 使用反应介质可以在低压下以良好的速率生产甲基纤维素醚。
摘要:
A paper sizing composition, comprising at least one first sizing component dispersed in water, the said sizing component being prepared of a reaction product of a maleic anhydride and a fatty acid component, and an aluminium component. The fatty acid component comprises an alkyl ester of one or more fatty acids selected from a vegetable oil based fatty acid mixture. The particle size of the particles in said first sizing component has been reduced so that in the dispersion at least 50% of the particles are
摘要:
An additive for paper or board production e.g. for decreasing pitch problems. The additive includes at least a component including fatty acid glycerides, preferably triglycerides, comprising a high percentage of unsaturated, preferably polyunsaturated, fatty acids. Raw or partly polymerized plant oil, such as sunflower oil, may be used.
摘要:
The present invention relates to a nonionic methyl ethyl hydroxyethyl cellulose ether having a flocculation temperature of 70-95° C., a DS-methyl of 0.1-0.8 and a DS-ethyl of 0.1-0.7. The cellulose ether has versatile properties and may be used as a thickening agent or a rheology modifier in an aqueous formulation, such as an aqueous latex-containing paint composition. A process for manufacturing the cellulose ether is also disclosed.
摘要:
The invention relates to the sizing of paper and board using alkenyl succinic anhydride (ASA). The invention provides a sizing composition which comprises an aqueous emulsion of an ASA wherein the ASA incorporates a maximum of 1% by weight (preferably a maximum of 0.5% by weight) of polymeric residues. The composition may incorporate less than 0.5% by weight of olefins. Paper sizing compositions in accordance with the invention provide enhanced resistance to penetration of the edges of paper and board by agents such as hot hydrogen peroxide and lactic acid.