23results about "Release paper" patented technology

The invention relates to a method for manufacturing SCK paper having a basis weight in the range of 50 to 100 g / m2, wherein an optimal combination of nonrecycled BCP, BCTMP and recycled pulp obtained from release liner supercalendered Kraft paper is used to adjust the properties of the fiber furnish. While the use of BCTMP enables a product having a higher bulk, the recycled pulp component, which has high compatibility with the paper manufacturing process, enables to balance the manufacturing process and reduce the dimensional changes and shrinkage of the formed SCK paper. The combined presence of the BCTMP and the recycled pulp component in the fiber furnish improves the water removal from the fibers during the SCK paper manufacturing, while the presence of non-recycled BCP produced from softwood improves the formation and runnability of the paper web on the paper machine. This enables to produce SCK paper with improved sustainability, wherein the density may be controlled by means of the fiber furnish, without downgauging and without adverse effects to other paper properties, which would prevent the use of the SCK paper as substrate layer in a release liner.

In a release paper consisting of a backing paper layer coated on at least one side with PVOH and a silicone coating on at least one side, in which the backing paper layer coated on at least one side with PVOH consists of bleached kraft paper, containing at least up to 30 wt. % softwood and hardwood with a total freeness between 30 °SR and 42 °SR, preferably between 33 °SR and 38 °SR, and processing aids, and also a release layer which is applied at least on one side to the PVOH-coated side of the backing paper layer and consists of 0.5 to 5 g / m2 of a silicone, and wherein the release paper coated at least on one side with PVOH and silicone has a density between 850 and 990 kg / m3, preferably between 900 and 970 kg / m3, and a method for producing a release paper.

Silicone release coating emulsions can be dried and cured to form a silicone release coating on both paper and plastic substrates. The coated substrates can be used in a variety of end-use applications, including (opto)electronic device fabrication and food contact applications.

The invention discloses temperature response type high-temperature-resistant release paper and a preparation method thereof. The release paper comprises a first release layer, a resin isolation layer, a base material layer, a resin punching layer, a temperature-sensitive layer and a second release layer which are sequentially stacked. The PNIPAAm temperature-sensitive layer is additionally arranged on the outer side of the perforated resin isolation layer, when the temperature-sensitive layer is lower than LCST (lowest critical compatibility temperature), molecular chains of the PNIPAAm temperature-sensitive layer are in a stretched state and are large in size, the perforated holes can be blocked, and water circulation can be prevented, when the temperature is higher than LCST, the molecular chains of PNIPAAm are in a contracted state and are small in size, and the perforated holes can be blocked by the PNIPAAm temperature-sensitive layer. Moisture can freely enter and exit through the exhaust holes, so that the use of the release paper is not influenced, and higher temperature can be resisted; the method can solve the problem that the water content of the paper is greatly changed due to the fact that the perforated release paper is influenced by external humidity.

The present invention relates to the field of the adhesive tape industry, and more particularly, to a base paper for adhesive tapes and adhesive tapes for packaging and office / stationery use. According to one particular embodiment, the adhesive tape of the present invention may be based on transparent paper, one side of the paper being coated with a release agent and the other side being optionally coated with a primer coating. The present invention also relates to a method of producing the adhesive tape base paper and the adhesive tape, and their use as packaging or office / stationery tapes.

A repulpable release liner and a combined composition for preparing the same are disclosed. The combined composition comprises (A) a first formulation comprising a vinyl-functionalized polysiloxane, a non-vinyl polysiloxane, and a noble metal- siloxane complex catalyst; (B) a second formulation comprising at least one olefin copolymer and at least one olefin- (meth) acrylic copolymer. The first formulation is independent of the second formulation. The release liner prepared with the combined composition exhibits superior repulpability, rub resistance, coatability of release coating with desired release force and the like.

The invention relates to a polymer-coated cellulosic substrate (S2) for a release liner (REL1), comprising a cellulosic support layer (PAP1), a first coating layer (PO1), comprising a first composition containing polyolefin, and an extruded primer layer (PRIM1) comprising a second composition containing a thermoplastic polymer covalently bonded to functional vinyl groups: wherein the first coating layer (POI) is situated between the cellulosic support layer (PAP1) and the extruded primer layer (PRIM1).

A polyorganosiloxane emulsion has a discontinuous phase dispersed in a continuous phase, wherein the discontinuous phase includes a hydrosilylation reaction curable polyorganosiloxane composition, and the continuous phase comprises water. The emulsion is useful for forming a coated article in which a substrate has a polyorganosiloxane release coating on its surface. The coated article is useful for food contact applications.

The present invention relates to a method for manufacturing a barrier layer for a paper or paperboard based packaging laminate, said method comprising: a) providing a barrier substrate comprising at least 50 wt% highly refined cellulose pulp (HRC) based on dry weight of the barrier substrate, said HRC having a Schopper-Riegler (SR) number above 80 as determined by standard ISO 5267- 1, b) providing a transfer coating substrate comprising a vacuum coating layer and a backing layer separated by a release layer, and c) transferring the vacuum coating layer from the backing layer to the barrier substrate by a transfer coating process using an adhesive layer applied on the barrier substrate and / or the vacuum coating layer to obtain a barrier layer for a paper or paperboard based packaging laminate.

A coated paper liner serves as both exterior packaging and an interior release liner for consumer products. The liner comprises a paper sheet layer with a first polymeric composition, such as a thermoplastic elastomer or polymer, forming a film on at least a portion of a surface of the paper sheet. The liner may also comprise a flexibility agent that enhances pliability and noise reduction during handling. The liner may include a release agent, like silicone, to prevent adhesion of consumer products to the liner. The method of manufacturing involves coating the paper sheet with the polymeric composition and flexibility agent, followed by drying. This solution offers a sustainable alternative to plastic films, providing to the liner heat-sealability, barrier properties, and recyclability.

A packaging film (1) based on cellulose for packaging food as a twist pack, wherein said packaging film (1) has a base layer (2) which extends in a longitudinal direction (L), a width direction (B) perpendicular to the longitudinal direction (L), and a thickness direction (D) perpendicular to the longitudinal direction (L) and the width direction (B), and wherein the base layer has a first surface (2a) which extends in the longitudinal direction (L) and in the width direction (B), and a second surface (2b) which extends in the longitudinal direction (L) and in the width direction (B) and which lies opposite the first surface (2a), and wherein the base layer (2) is produced from paper and / or cellulose-containing material, characterized in that the base layer (2) has a structure and / or embossing at least in sections in such a manner that a first section (22) of the base layer (2) is rotatable by at least 180° with respect to at least one axis of rotation in relation to a second section (24) of the base layer in order thus to form the twist pack - in particular without tearing.

A coated paper liner serves as both exterior packaging and an interior release liner for consumer products. The liner comprises a paper sheet layer with a first polymeric composition, such as a thermoplastic elastomer or polymer, forming a film on at least a portion of a surface of the paper sheet. The liner may comprise a flexibility agent that enhances pliability and noise reduction during handling. The liner may also include a release agent, such as silicone, to prevent adhesion of consumer products to the liner. The method of manufacturing involves coating the paper sheet with the polymeric composition and flexibility agent, followed by drying. This solution offers a sustainable alternative to plastic films, providing to the liner heat-sealability, barrier properties, and recyclability.

The invention relates to the technical field of release paper, in particular to release paper with a composite multilayer structure, which comprises a base material paper layer, a first bonding layer arranged at the top of the base material paper layer, a first surface functional layer arranged at the top of the first bonding layer, and a second bonding layer arranged at the bottom of the base material paper layer, and a second surface functional layer is arranged at the bottom of the second bonding layer. According to the release paper with the composite multi-layer structure and the manufacturing process of the release paper, the base material paper layer is impregnated and modified to form the microscopic expansion holes, and the interlayer physical occlusion and binding force are strengthened in cooperation with the negative pressure adsorption spraying film; a PMP-PA66 composite system is subjected to high-temperature lamination to form a compact barrier structure, water vapor and oxygen permeation is effectively blocked, a temperature-sensitive microcapsule containing a PMMA wall material and a stripping regulator core material is utilized to realize adaptive intelligent regulation of stripping force temperature, and meanwhile, the bonding resin is grafted and modified to form a bonding enhanced structure, so that the stripping strength is improved. And the interlayer bonding stability and the environment-resistant characteristic are improved.

The invention discloses a release agent for coated paper as well as a preparation method and application of the release agent, and belongs to the technical field of release paper materials. The release agent is an addition type organic silicon system, vinyl-terminated polydimethylsiloxane is used as a base material, vinyl-containing polyolefin copolymer emulsion is introduced into a core to serve as an anchoring agent, and hydrogen-containing silicone oil, a platinum catalyst and other components are compounded. The preparation method comprises the steps of premixing, proportioning, catalytic mixing and filtering, the application follows a process of coating a film first and then coating silicon, and a finished product is obtained through film coating, coating, curing and curing. The release agent realizes chemical bonding with a lamination layer through an anchoring agent, the adhesive force reaches 0 level, the change rate of release force is less than + / -5%, silicon transfer is avoided, the die cutting performance is excellent, the release agent is adaptive to a PE / PP lamination layer, corona pretreatment is not needed, the process is environment-friendly, and the release agent is suitable for the fields of adhesive products, electronic materials and the like.

The invention relates to the technical field of papermaking, and provides release paper for sanitary napkins and a printing method of the release paper. The release paper comprises: a base material; the printing layer is arranged on at least part of the surface of the base material, and the printing layer is formed by printing and curing body barrier type ink; the functional layer is arranged on at least part of the surface of the printing layer, and the functional layer comprises microcapsules encapsulated with active matters. The microcapsule is used for achieving the functions of resisting bacteria, removing odor and the like in the storage process of the sanitary napkin so as to maintain the cleanliness of the product; after the body barrier type ink is used for printing and is cured, the clearness and the wear resistance of images and texts are ensured, the barrier and interface matching effects between the microcapsule and a base material are achieved, and unexpected migration or failure of active matters in the printing, storage and transportation processes is avoided; therefore, while the printability and the appearance quality of the release paper are ensured, stable packaging of the active matter and function maintenance in the storage period are realized.

This organopolysiloxane composition for use in release paper or release film, said organopolysiloxane composition containing (A) an organopolysiloxane having two or more silicon atom-bonded alkenyl groups in each molecule, (B) an organohydrogen polysiloxane having two or more silicon atom-bonded hydrogen atoms (Si—H groups) on average in each molecule, (C) an organic peroxide and (D) a specific amount of a platinum group metal-based catalyst, is capable of undergoing an addition reaction with a smaller amount of the platinum group metal-based catalyst in comparison to the prior art, thereby being capable of forming a cured coating film which has a release strength equivalent to that of the prior art even in cases where a component that inhibits the catalytic activity of the platinum group metal-based catalyst is contained in the composition. In addition, this organopolysiloxane composition is capable of forming a cured coating film by means of an addition reaction even on a base material containing a catalyst poison component, on said base material conventional compositions being not able to be cured.

The invention provides a preparation method of anti-sticking oil-resistant baking paper, which comprises the following steps: mixing wood pulp, a retention and drainage aid, a reinforcing agent and an internal sizing agent, performing papermaking molding treatment, sequentially performing squeezing dehydration and primary drying treatment, and performing double-sided sizing treatment on a wet paper sheet by adopting a surface sizing agent, and sequentially carrying out secondary drying, calendaring and curling treatment on the paper sheet subjected to double-sided sizing treatment. By adopting the method, the anti-sticking and oil-resistant performance of the baking paper can be improved, only one-time in-machine coating is needed, the coating process can be simplified, the production efficiency is improved, and meanwhile, the production cost is reduced.

One of the purposes of the present invention is to provide an addition-curable organopolysiloxane composition which cures sufficiently with a minor amount of platinum group metal catalyst to exert satisfactory adhesion and provides a cured film having a release force comparable to the prior art cured film, and to provide an addition-curable organopolysiloxane composition which allows the sufficient progress of addition cure even on a substrate comprising a catalyst poison component so as to be suitable for providing a release coating for silicone rubber and release paper or release film. That is, the present invention provides an addition-curable organopolysiloxane composition comprising components (A) to (C): (A) an organopolysiloxane having two or more alkenyl groups each bonded to a silicon atom per molecule and having 0.01 to 2.9, as an average, (meth)acrylic groups, (B) an organohydrogenpolysiloxane having two or more hydrogen atoms each bonded to a silicon atom per molecule in such an amount that a ratio of the number of Si—H groups in component (B) to the number of alkenyl groups in component (A) is 1 to 5, and (C) a platinum group metal catalyst in an amount that a platinum group metal amount is 1 to 100 ppm by mass based on a total mass of the composition.

A coated paper liner serves as both exterior packaging and an interior release liner for consumer products. The liner comprises a paper sheet layer with a first polymeric composition, such as a thermoplastic elastomer or polymer, forming a film on at least a portion of a surface of the paper sheet. The liner also comprises a flexibility agent that enhances pliability and noise reduction during handling. The liner may include a release agent, like silicone, to prevent adhesion of consumer products to the liner. The method of manufacturing involves coating the paper sheet with the polymeric composition and flexibility agent, followed by drying. This solution offers a sustainable alternative to plastic films, providing to the liner heat-sealability, barrier properties, and recyclability.

The present invention provides a curable organopolysiloxane composition which is capable of undergoing an addition reaction with a small amount of a platinum group metal catalyst and has curability equivalent to those of conventional ones, the curable organopolysiloxane composition being also capable of forming a cured film having a peel strength equivalent to those of conventional ones especially for release paper and release films, and in which curing by an addition reaction proceeds even if a base material contains a catalyst poison component. The curable organopolysiloxane composition contains: (A) an organopolysiloxane which has two or more silicon atom-bonded alkenyl groups in each molecule, but does not have three or more (meth)acrylic groups in each molecule; (B) an organohydrogen polysiloxane which has two or more silicon atom-bonded hydrogen atoms on average in each molecule, but does not have three or more (meth)acrylic groups; (C) a compound which is other than an organopolysiloxane among compounds having one or more (meth)acrylic groups in each molecule, and has a molecular weight of 72 to 1,000, and the like; and (D) a platinum group metal catalyst.

A coated paper liner serves as both exterior packaging and an interior release liner for consumer products. The liner comprises a paper sheet layer with a first polymeric composition, such as a thermoplastic elastomer or polymer, forming a film on at least a portion of a surface of the paper sheet. The liner may also comprise a flexibility agent that enhances pliability and noise reduction during handling. The liner may include a release agent, like silicone, to prevent adhesion of consumer products to the liner. The method of manufacturing involves coating the paper sheet with the polymeric composition and flexibility agent, followed by drying. This solution offers a sustainable alternative to plastic films, providing to the liner heat-sealability, barrier properties, and recyclability.

The present invention relates to a method for manufacturing a paper substrate suitable for incorporating silicones in catalytic hydrosilylation reactions, and to the product thereof, the paper substrate comprising a cellulosic fiber-based paper and a polymeric primer layer, wherein the polymeric primer layer comprises a polymer containing an amount of functional vinyl groups equal to or higher than 0.5 millimoles per gram of polymer, so that the surface of the polymeric primer layer is hydrophobic. Advantageously, a high vinyl content polybutadiene, which can be obtained from the 1,2-addition polymerization of 1,3-butadiene, can be used in the polymeric primer layer.

An addition-curable releasing silicone composition for a silicone adhesive, including: (A) a fluorine-containing organopolysiloxane having at least two alkenyl groups, at least one fluorine-containing substituent, and at least one aryl and / or aralkyl group, wherein a fluorine content is 25 to 50 mass %, a proportion of the aryl and aralkyl groups relative to a a monovalent substituent is 0.1 to 20 mol %, and an area of a component having a molecular weight of 4,000 or less accounts for 2 to 20% of a total peak area; (B) an organohydrogenpolysiloxane having at least three SiH groups; (C) a platinum-group metal catalyst; (D) a non-fluorine solvent. Thus, a silicone composition for a releasing agent that can be diluted with a non-fluorine solvent, that has high coatability and adhesiveness on a film substrate, and that yields a cured coating having a small releasing force and small decrease in a residual adhesion force.