Abstract: A preheatable scrim and method of use for bonding together multiple layers of materials to form a laminate. The scrim includes a carrier layer which is impregnated with an adhesive having a melting point such that it can set and hold a bond. The scrim is preheated to its activation temperature and sandwiched between the materials layers. The sandwich is pressed together to bond the layers.

Abstract: Polyimide having repeating units of the following formula (I) and its polyamic acid precursor having repeating units of the following formula (II) are disclosed; ##STR1## (where Y is a radical selected from the group consisting of a bond, divalent hydrocarbon having 1 to 10 carbons, hexafluorinated isopropylidene, carbonyl, thio, sulfinyl, sulfonyl and oxide, and R is a tetra-valent radical selected from the group consisting of aliphatic radical having 2 and more carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non-condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).Typical examples of polyimide and polyamic acid include where Y is thio radical and R is ##STR2## Y is a bond and R is III or IV, and Y is isopropylidene radical and R is IV.The polymers can be prepared from corresponding diamine and tetracarboxylic acid dianhydride.

Abstract: The process for the forming of a covering element particularly for vehicle interiors consists in associating at a preset pressure, a wooden plate-like element with a malleable support defined by at least one layer made of a fabric impregnated with a product based on epoxy resin: subsequently, during the application of the pressure, the assembly is heated to a preset temperature to give the wooden plate-like element and the support the pre-required configuration; the covering element obtained with the above process includes a layer of wooden material (2) associated with a support (3) which is defined by at least one layer of fabric impregnated by a product based on epoxy resin.

Abstract: An embossing apparatus is disclosed as having a unique, perforated stainless steel platen which is fixedly disposed vertically above a nip which is formed between an embossing roll and a backup roll, both of which are designed to rotate about horizontal axes. The platen is curved so as to slidably support a sheet of thermoplastic material, as it moves from a generally horizontal position on the platen to a vertical position as it exits the platen downwardly into the nip. Means are provided above and below the platen for heating the platen and helping heat the sheet of thermoplastic material as it travels along the fixed platen.

Abstract: A consolidated structure with less than 6 percent void content is formed from a plurality of thermoplastic impregnated yarns traverse wound on a rotating mandrel by feeding the yarns under tension simultaneously from a source of supply to a traversing carriage as adjoining flat tapes. The tapes then move successively through a preheating section, a heated circular guide and a contact point heating source, all on the carriage, before being laid down in a predetermined path on the mandrel.

Abstract: A rail-tie fastening assembly for connecting a rail having a rail flange to a tie comprising a rail seat assembly and a rail anchor. Th rail seat assembly is connectable to the tie and includes an anchor slot and a seat hook assembly. The seat hook assembly is adapted to extend a distance over an upper surface of the rail flange. The rail anchor includes an anchor hook assembly adapted to extend over on the upper surface of the rail flange in an assembled position of the rail anchor to the rail seat assembly. The rail anchor is insertable through the anchor slot in the rail seat assembly to the assembled position. The seat hook assembly is spaced a distance from the upper surface of the rail in the assembled position of the rail anchor to the rail seat assembly. The anchor hook assembly engages one side of the rail flange and the seat hook assembly engages the opposite side of the rail flange to restrain lateral movement.

Abstract: A paper corrugating machine is disclosed which includes a heater for preheating the medium prior to the corrugation. The heater includes a curved metal plate where channels are drilled through end faces of the plate. Slots are provided at the end faces of the plate to interconnect pairs of adjacent channels at alternate ends to form a serpentine steam passage through the plate. End caps are welded over the slots to seal the communication between the adjacent interconnected pair of channels. Steam supply ports extend into the serpentine path to steam pressurize the serpentine passage. The heater is placed in a single facer corrugating apparatus above the upper and lower corrugating rolls. A variable wrap mechanism is also disclosed which varies the angle of wrap between the medium paper and the heater.

Abstract: A laminated metal sheet, the metal sheet having adhered on at least one major surface thereof a film of a non-crystalline polyester, and a process for the preparation thereof. The laminated metal sheet is particularly useful for forming into drawn and wall ironed (DWI) cans. The laminate is also useful for forming other non-retorted packaging components.

Abstract: Fiber-reinforced thermoplastic honeycomb is prepared in a continuous manner one half cell at a time by laying down a corrugated web of thermoplastic, with and without fiber-reinforcement atop a honeycomb, selectively fusing the node-antinode demes and repeating the process until a honeycomb of the desired depth is prepared.

Abstract: A process for the rapid bonding of lumber by surface heating is provided, which involves surface heating of a first piece of lumber to be bonded and applying an adhesive to the non-heated surface of another piece of lumber and then contacting the thus-prepared pieces of lumber and applying pressure with a cold press.

Abstract: A high-temperature resistant stacking support is composed of a, preferably self-supporting, core which at least partially is surrounded by a high-temperature resistant fiber composite made of polyimide fibers of the general formula ##STR1## wherein n is an integer larger than 1 and A represents a four-valent aromatic group.The stacking support can be produced by shrinking a polyimide fiber nonwoven consisting of polyimide fibers of the general formula (I) onto the core under heat exposure.These stacking supports are particularly useful for stacking heated aluminum sections.

Abstract: A method for twin sheet forming layers high heat distortion temperature thermoplastic materials. The process employs a low heat distortion temperature thermoplastic material layer disposed between the layers of high heat distortion temperature material layer to permit adhesion therebetween at moderate temperatures to reduce thermal degradation. The structures made therefrom are useful as aircraft ducting.

Abstract: A lightweight structural panel is formed by subjecting a surface of a metal cover sheet to an oxidizing treatment to remove any foreign substances thereon, applying an adhesive layer to a core member, and bonding the treated surface of the metal cover sheet to the adhesive layer on the core member. Preferably, the oxidizing treatment is by electron plasma surface treatment for a period of time sufficient to oxidize any oil, chemical film, or rust on the surface of the metal sheet. The core member is made of a plastic material which may also be subjected to electron plasma surface treatment. The metal cover sheet may instead be flame-treated, or treated with oxidizing chemicals such as hydrazine. Metal cover sheets may be bonded on both sides of the plastic core.

Abstract: A method and apparatus for starch adhesive bonding of paper, paperboard, and natural cellulosic-fiber materials, especially liner and fluted corrugating medium, into manufactured items, particularly corrugated board. The method includes applying an adhesive coating, comprising starch and water, to a first substrate (e.g. tips of flutes of a corrugated medium), contacting the applied coating with another substrate (e.g. liner) and while so positioned contacting an exterior surface of at least one of the substrates with an ultrasonic energy generating means so as to transmit the ultrasonic energy to the adhesive coating to increase coating adhesion to the substrates.

Abstract: The present invention discloses a method for laminating at least two polymer films. An intermediate assembly 40 is made comprising an adhesive film 20 and a dielectric polymer film 12. The method comprises the steps of: selecting an adhesive film 20 with a melting point T.sub.1, the adhesive film having inner and outer major surfaces 22, 24; selecting a polymer film 12, with a melting point T.sub.2, where T.sub.2 >T.sub.1, the polymer film having inner and outer major surfaces 14, 16; subjecting the inner surface 14 of the polymer film 12 to a high voltage electric discharge to form a treated inner surface; heating the polymer film 12 having the treated inner surface to a temperature greater than T.sub.1 ; aligning the inner adhesive surface 22 and the inner treated polymer surface 14 in opposed facing relationship; applying pressure to urge the films 12, 20 relatively together; and heating the pressed together films to a temperature greater than T.sub.

Abstract: A method for making a fiber reinforced crosslinked polyimide matrix composite article that is substantially free of internal voids and surface blisters is disclosed. The method includes heating a fiber prepreg under vacuum to remove volatile impurities and volatile reaction products from the prepreg and subsequently curing the prepreg to form the article.

Abstract: A corrugated cardboard producing machine has a preheater for heating a corrugated cardboard sheet of original paper or single face type corrugatd cardboard sheet in each of various processing stages for producing a corrugated cardboard by bonding a liner paper onto a corrugated central core paper. The preheater is provided with a lap amount adjusting tool whose insertion amount between a circumference of a roll of the preheater and the original paper or the single face type corrugated cardboard is adjustable. The lap amount adjusting tool is movable along the circumference of the roll of the preheater.

Abstract: A method of forming a chamfered and sealed end on a spiral wound plastic pipe of the type including at least a pair of radially spaced circumferential side walls connected by an intermediate wall which joins generally radially between the side walls and extends in a helical path axially of the pipe. The method includes determining the desired axial length of the chamfer and removing the intermediate wall which lies between the side walls axially inwardly of the end of the pipe a distance substantially equal to the desired length to define an outwardly open channel between the side walls. Thereafter one of the side walls is permanently deflected to bring it substantially into engagement with the end of the other of the side walls circumferentially about the pipe to thereby form a chamfer on the end of the pipe.

Abstract: A laminated metal sheet, the metal sheet having adhered on at least one major surface thereof a film of a non-crystalline polyester, and a process for the preparation thereof. The laminated metal sheet is particularly useful for forming into drawn and wall ironed (DWI) cans. The laminate is also useful for forming other non-retorted packaging components.

Abstract: A vibration-damping composite sheet steel made by sandwiching a viscoelastic material between two steel sheets. A rust proofing coating which generates no gaseous matter is formed on one surface of each of the steel sheets which is contacted with the viscoelastic material. The coating is a phosphate coating having no water of crystallization with a coating weight per unit area of 0.5 g/m.sup.2 or over, or a galvanized zinc coating including no zinc oxide.

Abstract: Manufacture of an article incorporating a thermosetting-powder surface-coating includes bonding a component to the article to the coating by contacting the melted powder with the component before curing takes place, and maintaining it in contact through curing. In a glass architectural panel, an aluminium foil is bonded in this way to a polyester/triglycidylisocyanurate powder coating on the silane-primed back of the facing glass; the metal foil is backed by a plastics or rubber open-cell material to enhance resistance of the glass to impact, and also, together with the foil, resistance to thermal shock. The coating includes pigmentation to give the effect of colored glass, or is clear to allow the contact-surface of the metal to show through; further decorative effect is obtained by pigmentation variation in the coating and/or partial metallization of the glass back-surface.

Abstract: An improved carpet, an improved method of making a carpet, and an improved method of attaching a carpet to a motor vehicle door trim panel. The improved carpet comprises an outer woven polypropylene pile layer, an inner nonwoven polypropylene layer, and a central intermediate recycled rubber layer. The carpet is formed by extruding a melted mixture of rubber and polypropylene particles to form a hot central sheet and thereafter adhering a woven polypropylene layer to the upper face of the hot sheet and a nonwoven polypropylene layer to the lower face of the hot sheet. Carpet is attached to the lower portion of a door trim panel of a motor vehicle by heating the lower portion of the door trim panel with hot air until the panel is tacky and thereafter pressing the invention carpet downwardly against the tacky surface of the door trim panel to form a firm welded marriage as between the carpet and the panel.

Abstract: An automobile bumper comprises a bumper face and a bumper beam constructed of members molded of thermoplastic resin. The bumper beam includes at least two members of thermoplastic resin having flanges for forming beam flanges together when the members are fused to each other, the beam flanges being fused to an inner surface of the bumper face. An FRP sheet is continuously heated in an atmosphere having a temperature successively lowered from a temperature higher than a resin melting temperature at which a resin of the FRP sheet is melted so that the entire FRP sheet is increased through successive heating stages to a temperature between the resin melting temperature and a resin degradation temperature at which the resin of the FRP sheet is degraded.

Abstract: Rows of wood fillets are assembled into panels by step-wise advancing the rows through two stages of wedge-shaped heating and gluing blocks where the edges of the fillets are pre-heated and then coated with a hot melt adhesive before being brought together with a strip of polyethylene foam between the edges of the fillets. The first stage assembles selected groups of the rows and the second stage joins the several groups so that the entire assemblage is accomplished over a relatively short distance and time. The resultant assembly exhibits improved flexibility and cohesiveness.

Abstract: A process for bonding metal directly to thermoplastic polymeric base materials and a process for producing printed circuits from such metal clad thermoplastic polymeric base materials are provided. The invention also includes the articles so produced. Metal clad thermoplastic polymeric base materials are produced by laminating a metal foil or sheet to thermoplastic polymeric base material, under pressure, at a temperature from about 2.degree. C. to about 45.degree. C. above the glass transition temperature (Tg) of the thermoplastic. The polymeric material is free of volatile materials such as moisture or solvents when laminated.

Abstract: Thermoplastic matrix composite cylinders, pipes, and other hollow bodies are formed by a winding technique using thermoplastic filaments. The filaments are fed from a vertically moving winding head onto the surface of a rotating mandrel. The filaments are preheated to soften them and then pass beneath a heated compaction roller bearing against the mandrel. The compaction roller is castered so as to follow a helical path. Several plies of the thermoplastic material may be laid down in this fashion, the surface of each prior ply being heated so that the layers fuse properly. When cooled to below its solidification temperature, the formed object is removed from the mandrel.

Abstract: Nonwoven fabrics are produced by mixing fibers especially textile fibers with binder powders, and by bonding the fibers and binder powders in twin-platform belt ovens for heating the powder. During this step, air is passed through the nonwoven mat or web or interlocked fibers. In order to avoid contamination of the oven with binder powder fragments detached from the nonwoven fabric, the provision is made to arrange a steaming process upstream of the air heat treatment process. The steam is to condense on the fibers or on the binder powder and to promote sticking of the powder to the fibers of the nonwoven fabric. Advantageously, a sieve drum device is employed in place of the twin-platform belt oven for the final bonding heat treatment; this device can operate herein in a much more economical fashion than the oven.

Abstract: This invention relates to a process for manufacturing laminated safety glass.A first process comprises the steps of:(A) coating at least one side of a glass plate with a film-forming plastisol composed of an epoxy group containing vinyl chloride resin as an indispensable component;(B) heating said glass plate having a coating to form a gel plastisol layer on at least one side of said glass plate; and(C) laminating another glass plate thereon through the medium of said gel plastisol layer and heating the resulting laminate, thereby bonding said glass plates to each other.A second process comprises the steps of:(a) filling the gap between the surfaces of a plurality of glass plates with a film-forming plastisol composed of an epoxy group-containing vinyl chloride resin as an indispensable component; and(b) heating said plurality of glass plates containing said film-forming plastisol filled into the gap therebetween, thereby bonding said plurality of glass plates to each other.

Abstract: A method for continuously producing a composite laminate comprising a thermoplastic synthetic resin sheet and an aluminum sheet laminated on each side of the resin sheet, wherein(1) as the thermoplastic resin sheet, a solid sheet is used,(2) as the aluminum sheet, an aluminum sheet having a thermoplastic adhesive layer provided on its surface is used,(3) two such aluminum sheets with the respective adhesive layers facing to each other, with the thermoplastic synthetic resin sheet interposed therebetween, are fed to hot press bonding rollers, and(4) when they are fed to the hot press bonding rollers, (a) a tension of at least 2 kg/mm.sup.2 is exerted to each aluminum sheet, and (b) the thermoplastic adhesive layer provided on the surface of each aluminum sheet is maintained to be in a molten state.

Abstract: Improved apparatus for dispensing tape of a thermoplastic matrix composite material onto a recipient surface comprising in combination support means for mounting a reel of tape; feed means for unwinding the tape from the reel and advancing it along a path of travel to the mandrel; a guillotine knife in the path of travel for cutting the tape at a predetermined angle with respect to the path of travel; a slotted, box-type pre-heater for the tape located in the path of travel following the knife for providing heat to the tape; a heated pressure roller located in the path of travel following the pre-heater for providing additional heat to the tape for effecting a process operating temperature and for applying the required pressure to the tape for lamination of the tape onto the recipient surface; cooling means located in the path of travel beyond the pressure roller for reducing the process heat from the laminated tape on the recipient surface and to smoothing it for thereby obtain the desired surface finish; an

Abstract: An optical fiber connector can be easily and quickly assembled by mounting the end of an optical fiber in a thermoplastic adhesive that is heated to a viscosity of between 1000 and 10,000 cp, has an Adhesion-to-Glass Value of at least 10N, and a Shore D hardness of at least 60 at 20.degree. C. The optical fiber connector lends itself to mass-production techniques and can be reused by heating to liquify the thermoplastic adhesive.

Abstract: An improved method of forming a ZnS layer on a ZnSe substrate by chemical vapor deposition of ZnS onto the ZnSe is disclosed in which the ZnS is contacted, prior to the chemical vapor deposition of the ZnS, with H.sub.2 S in the absence of zinc metal vapor to cause reaction of the H.sub.2 S and the surface of the ZnSe substrate.

Abstract: A braided insitu consolidated structure of fiber reinforced thermoplastic resin strands is formed by braiding the strands on a mandrel and then advancing the mandrel and the braided structure as it is formed continuously through a heating zone to heat the resin to a flowable condition then cooling the structure as it leaves the zone. Pressure may be applied or developed against the braided structure during its formation.

Abstract: Pre-glued, coil-coated brake shoe stock is manufactured on a continuous coil coating line wherein a heavy gauge steel strip is continuously fed through abrasion and surface cleaning steps, optionally treated with a phosphoric acid/alcohol solution and then followed by application of a phenol-formaldehyde resin, a controlled curing step, and again coiled. The phenol-formaldehyde resin may have incorporated in it solid particles which will improve the dimensional stability, thermal properties and vibration and sound-dampening characteristics of the brake shoes. Brake shoes stamped from the stock made under the particular conditions described have higher shear strength and adhesion to the brake pad or lining materials than those of the prior art and have fewer problems in manufacturing.

Abstract: A reinforced film of a laminate construction is thermally adhered to an edge of a web of paper stock in preparation for forming a reinforced edge of a file folder. The film has two layers, each having different characteristics, where the bottom layer becomes thermally active as an adhesive at a temperature substantially lower than the activation temperature of the other layer. The film is applied by directly heating the top layer to a temperature which in turn heats the bottom layer to a temperature where it acts as an adhesive. The layers can include a printed surface intermediate the film which is visible through the top layer or the layers can include an appropriate pigment to color code the edge of the folder. The apparatus can be added to existing file folder machines to apply the film without the need for sophisticated controls to tie the apparatus to the operation of the file folder machine.

Abstract: A single-ply, thermoplastic membrane roof construction includes, at its corners, a pair of right angularly disposed substantially rigid, edge corner pieces welded together along a mitered joint by way of bringing a heating block into contact with the horizontal and vertical edges to be joined, and then converging the pieces to form the mitered corner which is fastened to the underlying roof structure. Strips formed of the same membrane fabric material as the roof covering membrane are welded to the horizontal upper walls of the edge pieces. Edge linear continuation strips are fastened in position to extend from the corner pieces, but with a gap between them and the corner-forming pieces. Clips mated to the configuration of the edge pieces and strips have portions at one of their upper and lower ends which snap into position to unite the spaced apart edge pieces.

Abstract: A dual lumen catheter, for insertion into a vein of a patient for use in haemodialysis treatments, having first and second portions defining a shorter intake lumen and a longer return lumen. The intake lumen is closed at its end and receives blood through at least one opening in the side wall of the catheter and the second lumen includes the second portion which is of smaller cross-section than the first portion. Also described is a catheter having an intake lumen and a return lumen in which the return lumen has a tip of different stiffness from the main body of the catheter, the intake lumen being closed at its end and receiving fluid through an opening in the side wall of the catheter. Methods of making such catheters are also described.

Abstract: To prevent an end of a filled container, upon heating by a hot air for subsequent welding of edges thereof, from coming into contact and sticking to a retainer, a centering gas such as, for example, air is supplied from an external source to the container end. Edges of the filling opening of the container are heated by a hot gas for a subsequent closing of the same through a nozzle introducible into the filling opening of the container end. A centering fluid is directed at the end of the container with a component of flow of the centering in an axial direction of the container to provide for a contact-free centering of the container end.

Abstract: A plurality of thermoplastic sheets are laminated into a laminated assembly, which is then pressed into a laminated assembly. First, the sheets to be laminated in one cycle are heated while the sheets are arranged in a juxtaposed relationship in the order in which they are to be laminated. The heated sheets are penetrated with needles to detachably hold the sheets while keeping the sheets in the juxtaposed relationship. A support member which supports the laminated assembly is moved below the sheets held and relatively to the sheets in a direction in which the sheets are arranged in the juxtaposed relationship, the sheets are released from the needles onto the support member to stack the sheets thereon into the laminated assembly while the support member is being moved relatively to the sheets. The support is then delivered into a shaping die assembly.

Abstract: Finger jointed lumber is produced from discrete green lumber pieces each formed with a first set of fingers on one end and a second set of fingers at the other end. The first set of fingers is dried by rapidly applying heat substantially solely through the first set of fingers in a first drying station. The second set of fingers is then rapidly dried in a second drying station. A thermo-setting adhesive is applied to the second set of fingers of each lumber piece while still hot and the second set of fingers on one piece and the first fingers on an adjacent lumber piece are mated and crowded together to form a joint. The adhesive is significantly cured by residual heat in the mating ends before significant moisture migrates back to the fingers from the bodies of the mating lumber pieces and interferes with the curing of the adhesive.

Abstract: A quick-cure laminating process for multi-lamp photoflash arrays includes the application of a curable adhesive to a metallic printed circuit, the positioning of the adhesive-covered printed circuit adjacent a deformable rubber material and a circuit board and the printed circuit and circuit board intermediate a pair of surfaces movable with respect to one another and the moving of said surfaces to exert a compressive force on said printed circuit and circuit board while being heated to a temperature and for a time sufficient to effect attachment of the printed circuit to the circuit board. In another aspect, the circuit board may be of a deformable material, placed in contact with an adhesive-covered printed circuit, compressed and heated to effect attachment of the printed circuit to the circuit board.

Abstract: A method of making a laminated structure in which a polyethylene element is bonded directly to a metal substrate by the application of heat and pressure is characterised by the selection of the polyethylene, for the purpose of obtaining good adhesion, to be a linear low density polyethylene having a density from 0.91 to 0.94 g/ml.sup.-1 and a melt flow index in the range 0.2 to 2.0 g/10 min, produced by low pressure co-polymerisation of ethylene and but-1-ene. The polyethylene may be pre-treated, e.g. by corona discharge, glow discharge or flame treatment to further improve the adhesion. The polyethylene element may be a film applied to one or both sides of the metal substrate which may be a sheet or foil.

Abstract: Method and apparatus for sealing the end of a thermoplastic tube wherein a tapered mandrel is heated to a temperature above the melting point of the tube and is inserted into the tube to force direct contact of the tube with the mandrel. After the contacted surface has fused, the mandrel is raised and a heated jet of air expands the tube, allowing the mandrel to be withdrawn. Jaws clamp the mandrel surfaces together to form the seal.

Abstract: A nail file comprises a core of stiff sheet material and a layer of abrasive material laminated to at least one surface of the sheet material.

Abstract: Two thermoplastic tubes are welded together in a process which includes severing the tubes by a severing wafer having a temperature of about 350.degree. F. to create two cut sections. The severing wafer is removed from the space between the tubes and a hot wafer having a temperature of 500.degree.-1200.degree. F. is inserted in the space to radiantly heat the tube ends so that they are welded when pressed-together while in an unflattened and open condition.

Abstract: This invention presents a series of synthetic based cold seal adhesives which are capable of forming a strong bond at room temperature, yet which may be reeled up without blocking and stored for extended periods of time. Such adhesives can be used in place of the natural rubber based cold seal adhesives currently used, and thus, can be employed in any packaging application where cold seal properties are desirable.

Abstract: Articles comprising a thermoplastic substrate bearing rupturable microcapsules in a binder on at least one surface thereof. These articles can be applied by means of heat and pressure to porous objects. The process of applying the articles to porous objects further results in partially embedding the microcapsules in the substrate. Thermoplastic substrates having rupturable microcapsules partially embedded therein, but not having a binder, are another aspect of this invention.

Abstract: Novel films, and processes for making them, are provided. The films are characterized by the inclusion of a layer of vinylidene chloride copolymer between at least two other layers which contain ethylene vinyl acetate, and optionally linear low density polyethylene. The films may be unoriented or oriented. Oriented films may optionally be cross-linked. The novel process of making the cross-linked films includes the step of cross-linking the film after assembly of the vinylidene chloride copolymer layer into the structure.

Abstract: A process for manufacturing a composite panel capable of shock absorption comprising applying a bonding agent with an added cross-linking agent on a surface of a foam member to form a primer treatment surface thereon and applying to a surface of a laminating member the same or a similar bonding agent with added cross-linking agent. The treated surfaces of the foam member and laminating member are then placed into contact with one another and the two members are bonded together while heating the same and applying pressure thereto.

Abstract: A process for solvent welding pure polybutene-1, or blends or copolymer of polytbutene-1 to polybutene-1 where the polybutene-1 items are contacted with a solvent such as methylene chloride, tetrahydrofuran or cyclohexane and then contacted together within a variable period of time after solidification of the polybutene-1 items.