42results about How to "Avoid glue residue" patented technology

The invention discloses an adhesive for a UV viscosity-reducing film and the UV viscosity-reducing film thereof. The adhesive is prepared from the following raw materials in parts by mass: 30-60 partsof acrylate resin, 8-12 parts of tackifying resin, 5-10 parts of a polyfunctional monomer, 0.5-3 parts of an antistatic agent, 2-3 parts of a photoinitiator, 1.5-4 parts of a curing agent and 25-50 parts of a solvent. According to the UV viscosity-reducing film, the stripping force before UV illumination is larger than 25 N/25 mm, the stripping force after UV illumination is lower than 0.1 N/25 mm, no residual adhesive is left, the viscosity-reducing film has excellent antistatic performance, and the resistance of the adhesive layer is 109 ohms or below.

The invention discloses a novel easily-peeled pressure-sensitive adhesive. The novel easily-peeled pressure-sensitive adhesive comprises, by weight, 2 to 10 parts of methyl acrylate, 1 to 5 parts of butyl acrylate, 3 to 15 parts of vinyl acetate, 10 to 30 parts of 2-ethylhexyl acrylate, 30 to 40 parts of 2-ethylhexyl methacrylate, 5 to 10 parts of glycerol, 3 to 7 parts of a cross-linking agent, 30 to 50 parts of an organic solvent and 5 to 10 parts of rosin. The novel easily-peeled pressure-sensitive adhesive is mainly used as a bonding layer between two films, can be easily peeled from a base, has good transparency and no residues, can be processed easily and is convenient for use. When a film with the novel easily-peeled pressure-sensitive adhesive is pasted on a base and especially on clothes and caps, the top layer and the bottom layer can be separated easily and the bottom layer is still pasted on the base. Therefore, the novel easily-peeled pressure-sensitive adhesive can be used for various double-layer film pasting.

A label paper with high stability is composed of a thermoshrinkable plastic film, a pressure-sensitive adhesive layer and a parting paper layer. Its preparing process is also disclosed.

The invention provides a glue control method of a step package substrate. The glue control method comprises the following steps that firstly, acid washing is conducted on an inner single chip of a package structure with a groove, and the groove is provided with a layer of peelable glue in a silk printing mode; secondly, the structure provided with the peelable glue in the silk printing mode is baked, so that the peelable glue is solidified and shaped; thirdly, after the peelable glue is solidified and shaped, brown oxidation is conducted on the inner single chip, and lamination is conducted on the inner single chip so as to form a multilayer board; fourthly, before a finished product is milled, the peelable glue is removed, so that a conductor under the peelable glue is exposed. The glue control method of the step package substrate can effectively prevent the situation that flow glue remains on the exposed conductor in the groove.

The invention discloses a tail end and hinge structure of a PP cellular board and a treatment process thereof. The structure comprises a cellular board layer (5) and an epidermal layer (10) fixedly covering the lower surface of the cellular board layer, wherein the epidermal layer coats the end surface (6) of the cellular board layer of the cellular board layer and forms an epidermal layer folding face (7) on the end surface of the cellular board layer; a semi-arc-shaped hinge port (9) is formed in the cellular board layer. By means of a reversing technology, the rim of the cellular board layer is coated, so that the cellular board layer is not leaked while the strength is increased, and the commodity is enhanced; the cellular board layer is compounded and bonded to the epidermal layer while a PP material is extruded, so that a solvent adhesive is solved, the damage on the environment and human is reduced, and meanwhile, the residue of the solvent adhesive is also solved, and the commodity is enhanced; the hinge is heated and thermally pressed through the cellular board layer to overturn at 180 degrees, so that a non-woven fabric is not used, and the material cost is lowered.

The purpose of the present invention is to provide a dicing adhesive tape for processing semiconductors, the tape having adhesive strength to sufficiently hold a semiconductor wafer during the process of performing dicing on the wafer, without causing problems such as adhesion to the device or the tray of packages that have been fragmented after the package dicing. The present invention provides a dicing tape for processing semiconductors, characterized in that: a radiation-curing adhesive layer is formed on at least one surface of a substrate film; the adhesive film comprises a resin composition containing, as a base polymer, an acrylic-based polymer; the thickness of the adhesive film is 10 to 30 mum; the adhesive strength of the adhesive layer, after irradiation of an SUS304 with radiation based on JIS Z0237, is 1.0 to 2.0N/25 mm tape width when a 90 DEG peel test is performed; and the peak intensity of a probe tack of the adhesive layer after irradiation with radiation under air atmospheric conditions is 50 to 150 mN/mm2.

The invention discloses a servo gluing quantification machine. The servo gluing quantification machine comprises a servo electric cylinder, a support and a glue cylinder, wherein the servo electric cylinder is fixedly connected with the glue cylinder through the support; the glue cylinder is provided with a glue feeding cavity with an upper opening; a throat sealing metal piece is mounted at the upper part of the glue feeding cavity in a sealed manner and provided with a vertical shaft hole; a piston rod is mounted in the vertical shaft hole; a dynamic sealing piece for sealing a gap between the piston rod and the vertical shaft hole is mounted in the vertical shaft hole; the diameter of the piston rod is smaller than the inner diameter of the glue feeding cavity; a glue feeding port communicated with the glue feeding cavity is formed in the bottom of the glue cylinder; a glue feeding valve is mounted in the glue feeding port; a push rod of the servo electric cylinder is coaxially arranged above the piston rod; a glue discharging cavity is formed in the glue cylinder, and the upper part of the glue discharging cavity is communicated with the glue feeding cavity through communicating holes; a glue discharging port communicated with the glue discharging cavity is formed in the bottom of the glue cylinder; a glue discharging valve is mounted in the glue discharging port. The servogluing quantification machine has beneficial effects as follows: first-in first-out of glue is guaranteed by adopting an isovolumetric replacement principle, and the problem of glue stacking or glueresidues in the glue cylinder is solved.

The invention provides a preparation method of adhesive tape. The preparation method is characterized by comprising the following steps that a first release film is coated with a thermosenstive adhesive, and drying is conducted to form a release film layer and a thermosensitive adhesive layer; a second release film is coated with the thermosensitive adhesive to form a pressure-sensitive adhesive layer fit with the second release film, drying is conducted, and a base material and the pressure-sensitive adhesive layer are fit; the second release film is stripped from the pressure-sensitive adhesive layer and fit with the thermosensitive adhesive layer, and the adhesive tape on which the release film layer, the thermosensitive adhesive layer, the pressure-sensitive adhesive layer and the base material layer are sequentially fit is formed. According to the preparation method, the adhesive tape which can reduce bubbles or marks generated when a shell is wrapped can be obtained, the manufacture procedure protection effect is improved, and the problem that adhesive residues exist after the thermosensitive adhesive layer is fit through heating and stripped through cooling is avoided.

An optical thin film of backlight module comprises a basal plate and a prism sheet. The prism sheet is arranged on one side of the basal plate and comprises a plurality of prism patterns in periodic arrangement. The prism patterns respectively have a plurality of triangular prisms, wherein, a round angle is formed between at least two adjacent triangular prisms. The present invention can reduce residual glue of roller wheels.

The invention discloses a processing apparatus for a flocking flexible shaft. The processing apparatus comprises a material stack bin, a heating device and a traction wheel, wherein a wool spool coiled with wool is arranged in the material stack bin; the to-be-flocked flexible shaft used as a core wire is coiled on the flexible shaft wool spool; one end of the flexible shaft penetrates the material stack bin and the heating device to be connected to the traction wheel; and the wool is coiled on the flexible shaft. The processing apparatus adopts a hot melting method to realize mechanical automatic production, thereby reducing work intensity of operation staff and dependence on the manual technology, allowing processing technology to realize reel production of the flocking flexible shafts, and improving the processing efficiency. The produced flocking flexible shaft has universality.

The invention discloses a manufacturing method of a copper-block-embedded circuit board, and relates to the technical field of printed circuit board manufacturing. The thickness of the embedded copper block is controlled to be smaller than that of the circuit board, the height difference prevents glue from flowing to the board surface of the circuit board after lamination, and the phenomenon of residual glue on the board surface is avoided; copper reduction treatment is carried out on the upper and lower surfaces of the circuit board, so that the thickness of the circuit board is smaller than that of the embedded copper block, and the height difference enables the upper and lower surfaces of the embedded copper block to protrude out of the circuit board, so that the upper and lower surfaces of the embedded copper block are subjected to glue removal; finally, the upper and lower board surfaces of the circuit board and the upper and lower surfaces of the embedded copper block are subjected to board grinding treatment to remove colloid on the upper and lower surfaces of the embedded copper block, and meanwhile it is guaranteed that the upper and lower board surfaces of the circuit board are flush with the upper and lower surfaces of the embedded copper block. According to the manufacturing method, the glue removing efficiency is improved, and meanwhile, the board surface of the copper block embedded circuit board is prevented from being deformed and damaged.

The invention provides an acrylate prepolymer as well as a preparation method and application thereof, and belongs to the technical field of organic synthesis. The acrylate prepolymer is prepared from the following raw materials: a core acrylate monomer and a shell acrylate monomer; the core acrylate monomer comprises alkyl acrylate I, aryl acrylate and acrylic acid; the shell acrylate monomer comprises alkyl acrylate II, an acrylamide derivative and acrylic acid; the molar ratio of the alkyl acrylate I to the alkyl acrylate II is 1: (9-19). According to the invention, by reasonably controlling the raw material components and proportion of the acrylate prepolymer, the obtained acrylate prepolymer has excellent performance, and the OCA optical cement prepared from the acrylate prepolymer can be better suitable for a soft screen and has excellent elasticity, flexibility and use performance.

The present invention provides a wafer processing method and a wafer obtained by the wafer processing method. The wafer processing method comprises a solvent cleaning step before a random appropriate processing step is performed, wherein a wafer can be properly kept and residual adhesive after stripping of a binding sheet is prevented in the processing step. The wafer processing method of the invention comprises the steps of: a binding sheet binding step for binding the wafer on the binding strip which is provided with a substrate and an adhesive layer with radiating-ray curable adhesive; a radiating ray irradiating step of irradiating radiating ray on the adhesive layer of the binding sheet for processing the wafer; the cleaning step of cleaning the wafer by the solvent; and a processing step of processing the wafer. In the wafer processing method of the invention, the radiating ray irradiating step is performed before the cleaning step.