36results about How to "Short hot pressing time" patented technology

The invention relates to a bamboo floor, in particular to a composite bamboo floor. The composite bamboo floor comprises a surface plate and a core plate, wherein the surface plate is formed through solidification of first thermosetting resin and multiple bamboo fiber rods, and the core plate is arranged under the surface plate; the surface plate is provided with a body, a pressed surface which is exposed so as to display the shape of bamboo joints, a connecting surface connected with the core plate, at least one side face formed through cutting, and an end face; the core plate is provided with a surface connected with the surface plate, a bottom surface opposite to the surface, a side face parallel to the side face of the surface plate, and an end face parallel to the end face of the surface plate; notch structures are machined in the side face of the core plate or in the side faces of both the core plate and the surface plate and located on the two sides of the length direction of the composite bamboo floor. The composite bamboo floor is high in strength and machining efficiency and low in production cost.

The invention discloses a formula and a preparation method of substrate-free low temperature reactive hot melt adhesive tape. The adhesive tape consists of substrate-free dry glue and a double-sided release film or double-sided release paper; the glue is prepared from 100-150 parts of thermoplastic polyurethane, 50-150 parts of rosin glyceride, 1-40 parts of a blocked crosslinking agent, 1-10 parts of a wetting leveling agent, 1-10 parts of a defoaming agent, 1-10 parts of a rheological agent, 0.1-5 parts of an anti-aging agent and 100-400 parts of a mixed solvent of ketones and esters; the substrate-free low temperature reactive hot melt adhesive tape is prepared by coating a substrate with the glue, drying, winding, and cutting. By designing the deblocking temperature of the crosslinkingagent and the softening point of the resin, the adhesive tape can be stored and transported at room temperature, and can realize a bonding strength of 2-3 N / mm<2> at a lower heating temperature (90-110 DEG C) and a lower pressure (1-2 bar). Therefore, the substrate-free low temperature reactive hot melt adhesive tape can solve the problems that the existing low-temperature hot melt adhesive is low in bonding strength, and the low-temperature reactive hot-melt adhesive requires special storage and transportation conditions; the substrate-free low temperature reactive hot melt adhesive tape cangreatly reduce the raw material storage and transportation costs of the electronic device manufacturer, and meets the bonding requirements for small parts of the current electronic products.

The invention discloses a writing board and a production method thereof. The method includes assembling a high-luminance stainless steel template and a cushion into a single-layer hot press, and putting the cushion between a hot press plate of the single-layer hot press and the high-luminance stainless steel template; blowing and dedusting each middle-density fiber plate; covering melamine steeped bond paper on the middle-density fiber plates to form a plate blank; feeding the plate blank into the hot press, closing the single-layer hot press to start pressing, and controlling the hot press temperature at 190-200 DEG C, the hot press pressure at 25-28kg / cm<2> and the hot press time for 16-25 seconds to acquire the writing board. By the method, operation procedure is simplified, cost is reduced, and production efficiency and product quality are improved; temperature of hot press technology is low, hot press time is short, easiness in control and operation is realized, and plates does not deform and warp; product surfaces are smooth and compact, so that written words can be erased easily without any solvent.

The invention relates to a production method of an anti-deformation material-saving paint-free three-laminated composite plate. A panel and a baseplate are melamine-impregnated laminated plates, and the middle plate is a lateral assembly finger-jointed fir plate. The production method includes slicing the middle plate in to stripes, extracting material of the middle plate, processing rough blanks of the middle plate, finger-jointing the middle plate, hot- pressing the middle plate, repairing the middle plate, compositely pressing the entire plate and post-processing the entire plate. Since special processing is adopted, wasted small or short fir material which is lower than 0.65 cm in thickness, 2cm in length and 1.5 cm in width can be utilized, waste of edge material can be controlled effectively, a four-side moulding procedure can be omitted during processing the rough blanks of the middle plate after the fir material is dried, mortising and finger jointing can be performed directly, energy consumption is lowered by 12%, utilizing rate of fir with diameter ranging from 8 to 10 cm is increased by more than 15% after being processed into three-laminated finger-jointed plates by calculating, and the rate of non-section plate material is increased by more than 30%.

The invention discloses a preparation method of low-density fiberboards, which comprises the steps of timber chipping, fiber preparation, fiber sizing, pavement, prepressing, hot pressing, and treatment of rough boards, wherein the ratio of fibers to adhesives is 10:1.2-2 in parts by weight in the step of fiber sizing, and the adhesives are prepared by mixing 90-99wt% of melamine-modified urea resin adhesive and 1-10wt% of melamine-formaldehyde resin adhesive, the mole ratio of formaldehyde to urea in the melamine-modified urea resin adhesive is 1.2:1, and the weight ratio of melamine to formaldehyde in the melamine-formaldehyde resin adhesive is 0.9:1. Low-density fiberboards with density of 450-650kg / m<3>, prepared with the method, can be used as furniture boards or loading boards. Because the low-density fiberboards have lower density than that of furniture type medium-density fiberboards, fewer timbers are consumed in production, and a great number of timber resources can be saved.

The present invention provides a surface decorated wood-based panel with a dermatoglyph paper impregnated thermosetting resin, and a production method thereof. The method comprises: assembling a dermatoglyph stainless steel template and a buffer cushion into a single layer hot pressing machine, and placing the buffer cushion between the hot pressing plate of the hot pressing machine and the dermatoglyph stainless steel template to form a wood-based panel slab; carrying out transfer operation on the substrate by using a plurality of vacuum suction disks, and carrying out gas blowing dust removing and anti-plate overlaying adhesion treatment; and carrying out hot pressing through the hot pressing machine to form the surface decorated wood-based panel with the dermatoglyph paper impregnated thermosetting resin, wherein the hot pressing temperature is controlled to 180-190 DEG C, the hot pressing pressure is controlled to 25-28 kg / cm<2>, and the hot pressing time is controlled to 20-28 s. According to the present invention, characteristics of simple manufacturing process, easy mechanized mass production, low production cost, strong texture of the surface decorated wood-based panel, high simulation degree, beautiful and stylish property, no use of glue during production, environmental protection and cost saving are provided, and the multiple steps of the production process are improved so as to provide characteristics of energy saving and time saving.