JPH07502578A - Recyclable polymeric synthetic paper and its manufacturing method - Google Patents

Abstract

A high-opacity cellulose-free synthetic paper (58) is formed from a wet-laid nonwoven web of thermoplastic fibers (44), all or most of which fibers are made of a predetermined polymeric material. The wet-laid web is dried to remove excess water (46), drying (48) being carried out at temperatures below the melting temperature of the predetermined polymeric material. The dried nonwoven web is saturated on at least one side with a pigmented binder (50) forming a continuous coating thereon. The binder is cured at temperatures below the melting temperature (54) of the predetermined polymeric material.

Description

[Detailed description of the invention] How to send field of invention The present invention is generally produced on conventional continuous wet-laying (wet-1, ay) papermaking equipment. Regarding synthetic paper. In particular, the present invention provides recyclable materials made of 100% polymeric materials. The present invention relates to polymeric synthetic paper that can be rolled.

The present invention also relates to labels, particularly for labeling blow molded plastic containers. Concerning labels suitable for use.

In particular, labels are coated synthetic webs made by wet deposition methods. ]00%. Labels can be printed with or without adhesive. Bell's synthetic fiber base (e.g., polyethylene, polyester, or polypropylene) (in-mol) into a blow-molded container made from the same synthetic material as d) Or it can be affixed after molding and recycled along with the container. can do.

Background of the invention Conventionally, synthetic paper was made using synthetic pulp made of short polyethylene fibers. was. Such synthetic paper is made of polyethylene pulp containing cellulose fibers or Made using polyethylene pulp that does not contain cellulose fibers. like this Flexible polymeric synthetic substrates are suitable for use in water-resistant cardboard, embossed papers, heat-sealable papers, and bags. Separators, Feltoma Soto, Sanitary Absorbers and Building Materials It is used for many purposes. A large number of products are available to meet the needs of various applications. grade polyethylene can now be commercially handcrafted. these Synthetic pulp products use polyethylene, which has different physical properties.

Polypropylene products and polypropylene/polyethylene products are also known. Ru.

U.S. Patent No. 5,047°121 to Kochar , a composite containing at least 97% by weight polyethylene in conventional continuous wet pile paper making equipment. A method of making paper is disclosed. This method consists of: (1) 97 to 99.5 weights; % polyethylene fiber and 0.5 to 3.0% by weight polyvinyl alcohol binder. (2) wet-processing the valve composition; A step of forming a sizeless sheet by breaking it on the screen of a stacked paper making machine, and (3) ) first drying phase from about 93°C to about 132°C (200'F to 270'' F) to dissolve the polyvinyl alcohol fibers and perform the second drying phase. The series is carried out at a temperature of about 87°C to about 116°C (190°F to 240°F). Controls the stretch and elongation of the The unsized sheet obtained as described above in a heated drying can with a drying profile of (4) drying the paper at a temperature of about 121°C to about 15°C; Thermal bonding at a temperature of 7°C (250°F to 315°F) to obtain polyethylene paper It has a process.

Thermal bonding can be done using calender rolls. U.S. Patent No. 5,0 No. 47,121 states that (1) the strength of this synthetic paper is This can be adjusted by changing the amount of polyvinyl alcohol fibers contained. and (2) the porosity of synthetic paper can be adjusted by changing the bonding temperature. It has been taught that this can be done.

According to this US patent, polyethylene pulp has a certain degree of thermal bonding temperature. It is said that it dissolves up to This allows for the specific uses described in this U.S. patent, Also, the port is suitable for filtration applications (e.g. vacuum cleaner bags) and battery separators. Polyethylene paper is obtained. However, the resulting paper has low opacity; This makes it unsuitable for use in high quality printing. This is caused by applying excessive heat for a long time. Polyethylene pulp now exhibits fluidity, and the structure resembles that of polyethylene film. This is because it becomes significantly translucent as it approaches .

Paper made from 100% synthetic fibers is useful as label paper. For example, In-mold labeling of molded plastic containers g) The label with adhesive support is applied to the container in the separation process after blow molding. Conventional labeling can be done at a lower cost than conventional methods. Label during molding Adhesive-backed label attachment eliminates this separation step, allowing adhesive-backed labels to Labor costs associated with handling and handling and application of adhesive-backed labels Capital costs associated with the equipment can be reduced.

According to traditional in-molding labeling of blow-molded plastic containers, the labels are continuous and placed in the mold by means of a vacuum actuator, for example. . The plastic material was then manufactured as described in U.S. Pat. As shown in Figure 6 of No. 4°986.866, the parison is formed by extrusion through the die. to be accomplished. Reference is made to this US patent in this specification. Mo The shield is fixed to seal the parison and then compressed air is passed through the nozzle. Blow molding is performed by feeding it inside the parison, which causes the parison to expand. As a result, it takes on a shape that corresponds to the inner surface of the mold. At the same time as blow molding, The heat-sealing layer of the label of U.S. Pat. No. 4,986,866 is on the outside of the parison. is pressed and fused to the parison. Finally, the mold is cooled and formed. The container is solidified and the mold is opened to obtain a labeled hollow container.

To increase efficiency, labeling of blow-molded containers can be done continuously and quickly. It is desirable to do so. Furthermore, the label to be applied during labeling during molding Automatic equipment used to handle labels may cause wrinkles or folds in the labels. It is necessary to have sufficient rigidity to prevent this from happening. At the same time, the label should be bent on the container. It must have sufficient elasticity so that it does not tear or separate from the container when squeezed or squeezed. There is a point.

Traditional in-form labeling labels made from paper can also be recycled To avoid plastic materials being contaminated by small pieces of paper, Prior to recycling containers, use paper labels, solvents or mechanical means It has the disadvantage that it must be removed.

One prior art attempt to address such recycling problems is by Dudley. No. 4,837°075, issued to U.S. patent for in-process labeling of blow-molded polyethylene containers coextruded plastic film labels are taught. This label is It has a heat-activated ethylene polymer adhesive layer and a surface print layer made of polystyrene. It is growing. The heat activated adhesive substrate layer consists of polyethylene polymer. pigment or filler Fillers are incorporated into the polystyrene layer to provide a suitable printed substrate.

Suitable pigments include, for example, titanium dioxide, and suitable fillers include, for example, carbonate. There is calcium. Preferably, the regrind used to form such labels is The resulting layer of recycled thermoplastic material is combined with an adhesive layer and a surface print layer. be placed in between. Label stock is manufactured using traditional co-extrusion technology to produce a variety of labels. It is created by simultaneously extruding the bell layers. Do not use adhesives that are applied separately. stomach.

U.S. Pat. No. 4,986,866 to Over et al., mentioned above, discloses that thermoplastic resin film a thermosealing resin having a lower melting point than the thermoplastic resin base layer; A synthetic label for blow molded resin containers is taught during molding, consisting of layers. It is. The base layer is an inorganic filler like titanium dioxide or calcium carbonate and the filler is incorporated into the base layer or the latex coating of the base layer. Can be put in. The base layer may be, for example, high density polyethylene or polyethylene It can be a phthalate. The heat-sealing resin layer is made of, for example, low-density polyethylene. It can be done as follows. The heat-sealing resin layer firmly adheres the label to the resin container. It functions so that This U.S. patent blow molded container made from polyethylene According to a preferred embodiment of the label material used for the When they are joined together by extrusion.

U.S. Patent No. 5,006,394 to Baird, content of fillers, such as opacifiers or opacifying agents such as titanium dioxide and calcium carbonate. Polymeric film structures containing whitening agents or whitening agents are taught. The filler is the base layer and Both are concentrated in separate filler-containing layers that are coextruded. The base layer is polio Can be made of resin (e.g. polyethylene), polyester or nylon. I can do it. The filler-containing layer can be formed of any of the same polymeric materials is preferably made of ethylene vinyl acetate copolymer.

However, this film material is not used in disposable consumer products such as diapers. It is intended that

Additionally, U.S. Patent No. 4°941.9 to Guckert et al. No. 47 describes polyethylene synthetic pulp suitable for use in barcode printing. flash-spun polyester in face-to-face contact with the layer of Plexifilamentary film of tyrene - fibril strands (plex from the layer of ifilamentary film-fibril 5 trand) A thermally bonded composite sheet is disclosed. A layer of polyethylene synthetic pulp Formed by wet-laid papermaking technology.

U.S. Pat. No. 4,837,075 to Gutdori and Ober et al. No. 4,986,866 discloses a molded label having multiple coextruded layers. An in-mold label is disclosed. This is a complex structure Therefore, the manufacturing cost is reduced when manufacturing label materials for each molding process. invite a rise. Baird U.S. Patent No. 5,006°394, mentioned above, includes The film material shown in the figure is used as label paper for labeling during forming. Although it is not disclosed that it is suitable for such purposes, if it is used for such purposes, The laminate structure is quite complex and therefore the manufacturing cost is quite high. it is conceivable that. Similarly, a laminate structure is disclosed in the U.S. patent of Gutscart et al. ing.

Summary of the invention The present invention provides lint-free (lin+, -[ree) writing paper, plastic bottle A soft material suitable for use as labels, release liners, specialty wrapping paper or filter paper. It improves upon the prior art by providing a polymeric synthetic nonwoven substrate. especially , a preferred embodiment of the present invention is an opaque material suitable for use in high quality printing applications. It is a polymerized synthetic nonwoven substrate with high brightness.

Furthermore, the polymeric synthetic paper of the present invention does not contain cellulose fibers and therefore does not contain polymeric materials. Easy to recycle without costly separation from luulose material. You can perform cycle. In particular, it is an object of the present invention to Synthetic paper that leaves no foreign substances to be subjected to lean processing (screen 0LIL) Our goal is to provide the following.

The synthetic paper according to the present invention is useful for labels on polymerization containers, for example, labels on blow-molded polymerization containers. This label can be used as a label on polymerization containers prior to recycling. No need to remove. Such labels may be torn or removed from plastic containers. Flexing and squeezing of plastic containers without separation It has sufficient elasticity to withstand eezing. Furthermore, the nonwoven label of the present invention more porous than lume labels, which makes the label printable At the same time, it can be manufactured at a lower cost.

According to the invention, the synthetic paper is provided with a pigment coating on at least one side, e.g. , having a nonwoven web of fibers with a pigmented latex. This paper is commercial Made from locally available fibers. Paper ingredients are homogeneously mixed in water The material is then mixed into a web using a wet-laying method. can be done.

According to a first preferred embodiment, the fiber composition of the web is 8% polyethylene pulp. 8 to 100%, and polyvinyl alcohol binder fiber is 0 to 12%. There is. In a variation of this embodiment, the web is made of 70-100% polyethylene. Ren pulp, 0 to 12% polyvinyl alcohol binder fiber, and 0 to 3 Contains 0% polypropylene fiber. All or part of polyethylene pulp It is also possible to replace the portion with polypropylene pulp.

According to another preferred embodiment, the fiber composition of the web is comprised of shredded polyester fibers. 50 to 90% staple fiber, / core / 5 hea th) The binder fiber is lO to 40%, the polyvinyl alcohol binder fiber is O 10% and are combined with each other. Each bicomponent binder fiber is a copolyester It has a polyester core surrounded by a plastic sheath.

In both of these preferred embodiments, the nonwoven web of fibers comprises a binder material, For example, ethylene vinyl acetate latex or O to 30°C glass (gla ss) by impregnation with another suitable latex having a transition temperature (T, ); Printability can be further improved. The latex is preferably a carbonate Pigments such as lucium, titanium dioxide or both from 0.5/l to 8/1 It is formulated to contain a pigment/binder ratio of A synthetic paper with a surface is obtained. However, unlike traditional pond binders, , the use of a latex binder is not necessarily required in practicing the present invention.

Brief description of the drawing Figure 1 shows the production process that provides the raw materials used to produce synthetic paper according to the invention. It is a diagram showing lines.

Figure 2 shows the production of synthetic paper according to the present invention from the raw materials produced by the apparatus of Figure 1. It is a line diagram showing a production line.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS According to the invention, synthetic paper is formed from a web of synthetic fibers that does not contain cellulose fibers. will be accomplished. Synthetic fibers include polyethylene, polyester, polypropylene, or are other polymeric materials suitable for use in high-opacity papers. It can be made for free.

According to a first preferred embodiment, the web is made of 88-100% polyethylene fibers. ethylene vinyl acetate fiber and 0 to 12% polyvinyl alcohol fiber. Latex or glass transition temperature (T,) from O to 30'C calcium carbonate, as well as coated with other suitable latex with titanium dioxide, clay, talc, or other materials known to those skilled in the art. Formulated to contain inorganic pigments. Conventional coatings other than latex It is possible to include any binder.

The synthetic paper according to the present invention is made of polyethylene pulp, polypropylene pulp, shredded such as polyester staple fiber and polyvinyl alcohol binder fiber Manufactured from commercially available fibers. These components are homogeneous in water. The material is mixed into a quality mixture and then formed into a mat using a wet deposition method.

According to the first example of a polyethylene-based synthetic paper, the starting fibrous material In the country: Johnson City, Tennessee 37615 - Box 11. Get it from Minifibers located on Route 14 Mitsuj 9400 Fybrel (Trademark) 90% by weight polyethylene pulp and New York, New York, Ito-Chu Corporation (IL) located at 335 Madison Avenue. Kuraray, available from ocbu Corp. ) I 05-2 Polyvinyl alcohol (PVA) binder fiber 10% by weight It will be. In the case of Mitzi 9400 Fibrel(TM) polyethylene pulp, The polyethylene fibers have an average length of 0.90 mm and a diameter of 15 microns. Ru. Kuraray 105-2I) VA binder fibers have an average length of 5 mm and are is 2.0.

According to a second example of synthetic paper based on polyethylene, the starting fiber material is 9400 Fibrel(TM) polyethylene pulp is 100% by weight; Thus, PVA binder fibers are not essential to the practice of the present invention. This fruit In an embodiment, the polyethylene pulp is entangled in a wet deposition process; i.e. entangled to form a base sheet. . As an optional step, the base sheet is then coated with polyethylene pulp. Pigmented binder that prevents heat fusion ) to obtain high opacity synthetic paper with excellent printability. can.

Alternatively, according to a variant of synthetic paper based on polyethylene, Kuraray 10 5-2 Place a certain part of the PVA binder fiber in a 10 mm x 2.2 denier Hercules f (erculon) (trademark) polypropylene It can also be replaced with pyrene staple fiber. These polypropylene steel In the United States, fiber is located in Norcross, Georgia 30071. Hercules Inn, located at 301 Holcomb Bridge Road, 3169 Holcomb Bridge Road. Commercially available from Coholated (Hercubes Inc.) can. According to this variant, the web consists of 7o to 100% polyethylene fibers. , O to 12% PVA fiber, and 0 to 30% polypropylene fiber. I'm here. In one example of this variation successfully made by the inventor, polyethylene 85% of polypropylene fibers, 7.5% of PVA fibers, and 7.5% of polypropylene fibers. ．． It was 5%.

In both of the two variants, the polypropylene pulp is can be used in place of loop.

After drying the base mat, apply a coat containing a binder to improve the printability of the paper. For example, calcium carbonate, titanium dioxide, clay, talc, and other additives. Preferably treated with a coating containing latex pigmented with mechanical pigments. stomach. Such surface treatment may be accomplished using commercially available applicators, treaters or services. This can be done using a size press. Next, The web can be mechanically calendered to give the coating a desired surface smoothness. can.

According to a preferred embodiment of the coating applied to the web described above, the starting coat The coating material was 50% by weight Vinac 884 ethylene vinyl acetate. Nil latex and 50% by weight Jllbagloss carbonate. It is lucium. Or Airflex 4514E The tyrene vinyl acetate/ethylene vinyl chloride copolymer latex was made into Bynac 88 Although it can be used in place of 4-ethylene vinyl acetate latex, 884 ethylene vinyl acetate latex is preferred. Bynag 884 and E Arflex 4314 latex is sold in the United States by Pennsylvania 1 Ayer, located at 5100 Teilman Street, Allentown, 8104. Products and Chemicals (Air Products and Che polymers and chemicals division (Polym ers and Chemicals Division). can be done. Albagros calcium carbonate is known in the United States as a pencil North Thirteenth Street, Easton, Vanier 18042-1497 Pfizer, Incorporated, located at 640 Minerals, Pigments and Metals Division (M, NC, ) 1nerals, Pigments and Metals Divisio n) can be obtained commercially. Calcium carbonate contained in coating The amount of pigment is determined by the pigment/binder ratio. , can be changed in the range of 5/1 to 8/1. However, the preferred ratio is 1/1.

Synthetic paper according to the present invention can be manufactured on standard papermaking equipment. polyethylene A web of pulp, PVA binder fibers and polypropylene staple fibers A method for producing label paper will be described with reference to FIGS. 1 and 2. Figure 1 And FIG. 2 shows a raw material manufacturing device 8 and a paper manufacturing device 1o, respectively.

Fibrell(TM) 9400 polyethylene pulp with a solids content of 2% to 5% Load the fiber chest 12 in consistency. pulp is complete The pulp is dispersed in water and stirred until no fiber bundles are visible. Then this The mixture is pressurized through a deflaker 16 into a blending vessel 18. send In a deflaker, fibers undergo fiber-to-fiber agitation to form fiber bundles. or unopened lumps are removed. differential The raker is a disc refiner (di) in that it does not cut or shorten the fibers. sk refiner).

At the same time, a predetermined amount of Kuraray 105-2 PVA binder fibers and, optionally, A certain amount of polypropylene staple M&fiber was dissolved in warm water to a solid content of 0.5% to 5%. % consistency into the fiber open container 14. PVA binder fiber is Becomes gelatinous in warm water. The staple fibers are completely dispersed in the water and the fiber bundles appear at first glance. Stir the dispersion until it is completely dissolved.

This mixture is then pumped into blending vessel 18. Note that the mixture will blend under its own weight. If it falls into the container 18, no pumping is required. Binder and stay Pull fiber dispersion is a composition (furn) of PVA binder fibers and staple fibers. ish) so that the solid content is O to 12ii% and O to 30% by weight, respectively. added to the composition. Stir the mixture to obtain a consistency of 1% to 5% solids. Uniform composition of polyethylene pulp with seams, staple fibers and gelatinous PVA obtain a dispersion.

Next, the composition (furnish) is sent to a refiner (refiner) by pump 20. r) If it is necessary to force feed the fibers to 22 and reduce the average length of the fibers, use a beam refiner. A beat is applied to the fibers by 22.

The purified composition then enters a surge vessel 24 where the composition is here mixed with the broken paper composition supplied from the broken paper balpa 26. .

Waste paper is synthetic paper that is discharged during the manufacturing process. Waste paper can be classified as “wet” waste paper or can take the form of "dry" waste paper. Wet loss paper is wet press of paper making machine It is a synthetic paper taken from. Dry waste paper passes through a dryer or calendar When the roll is unwound, it is removed and prepared for shipment. This is paper that is removed from a sheet that is currently being used or is ejected during the production of defective products.

According to the method of the present invention, the waste paper has a consistency of 1% to 5% solids. The paper pulper 26 is loaded. A broken paper composition is one in which the fibers of the broken paper are completely dispersed in water and The fibers are agitated by a high shear agitator 28 until the fiber bundles appear to disappear. Lost paper set The composition is then maintained in consistency and the amount of waste paper added is 20% of the total volume. The surging capacity is controlled through the deflaker 30 so as not to exceed the The liquid is fed under pressure to the vessel 24. The purified composition and the broken paper composition are obtained by obtaining a homogeneous dispersion. The mixture is mixed in the surging vessel 24 until the mixture is mixed.

Next, the composition in the surging container 24 is pumped by the pump 32 to the container 34 of the device. However, the container 34 maintains a constant level within the container to reduce fluctuations in product weight. The contents are supplied to the molding section while maintaining the temperature. The final raw material is sent to the pump 36. Therefore, it is fed under pressure to a paper making machine (see Figure 2).

Before forming synthetic paper from raw materials (rubbish, gravel, pieces of kraft bags, sand and Large foreign objects (such as coarse particles) and fiber bundles are removed by a secondary and secondary cleaner 38 and It is removed from the feedstock by screening at 40. Materials containing ejected waste is supplied from the -next stage to the secondary cleaner. emissions from the secondary stage Treat the sewage and send the permissible material back to the main supply stream. This concentrates the waste. It can shrink and save fiber.

The composition has a solids content of O. supplied to The synthetic fiber web is then processed in standard wet-laid papermaking equipment. It is formed by a forming wire 44. Excess (excess) water is removed by gravity and a vacuum device. Remove. The formed web is wet pressed in the pressing section 46, and then the first In the dryer section 48, the Remove excess water by drying at ambient temperature.

During drying, the polymeric fibers do not melt and the gelatinous PVA stays with the polyethylene pulp. It acts as an adhesive to pre-bond the pull fibers to the web. (does not require great strength) In some applications, PVA is unnecessary. For example, entangled by wet deposition method. 100% polyethylene that is entangled The pulp has sufficient strength to be fed to the impregnator/coater. ) dry the web When drying, the temperature of the web and the temperature of the dryer can should be adjusted to 132° C. (269° F.). must pay attention to. Otherwise, the opacity of the synthetic paper may be lost. It becomes. Using release coatings on dryer cans can cause web defects and/or or to prevent adhesion (formerly 1dup) or sticking that may cause damage. It was found to be advantageous in stopping

The dried web is then treated with ethylene acetate containing calcium carbonate pigment. Impregnate with vinyl latex solution.

This process can be performed on a paper machine size press or Any type of off-line coater or processor 50 may be used. Cor The dry coating solids pick-up was reduced to 10% by weight, i.e. 200% by weight. applied to the web in an amount that can be 1000 kg/ton, but as understood by those skilled in the art. Expand this for the weight percent dry coating solids so that can be varied over a wide range. This coating is then transferred to the second dryer section. 54, again in the range of 60 to about 127°C (140'F' to 260°F). The ethylene vinyl acetate binds the fibers together. and bind the pigment to the fibers. Latex is exposed to excessive heat Excessive heat must be avoided during impregnation as it will aggregate and stick to the roll. . After drying the coating, the coated web is placed in a calender 5. The surface of 125 to 250 units (U old system S) was mechanically calendered at 6. Winding is performed on the reel 58 while maintaining smoothness (shelf yield).

According to the invention, 90% polyethylene pulp and 10% PVA binder fibers Table 1 shows the physical properties of the synthetic paper formed from the following.

Table■ Physical property test data 1-------轡i-慟--醤慟-藝-■-山---■Suncloud--1--One rumor and threat ■−One tatami enemy−−Sakaki−Tatami−−Myo−Kyosei−−Phrase−−Shizui Gag−|Yang sauce−−−−Yang− 轡--Kyo-sei----11 work---TAPPI physical uncoated finishing coat Tee No. Characteristics Base sheet Ning sheet K1 - Cloudy ---■Yogei glaze - Hibiki hat ---■ Tatami --- Tatami Shizu --- Sauce ---・1- ■ Hiro -- Shizu --- Yang --- Sauce Eel --- Yang■轡 ---Hibiki- | Shizuka --- Soichi ---) Gourmet War ---Yuhiichi Gatatamiyo 41 0 Basic weight (3300ft”) 45.2 50.0 (oz, /yd2) 2.2 2.4 411 Caliper (nil) 8.8 8.0251 Porosity-<O<0 Transparency Frazier Air (cfm) 460 Gari porosity +0 22 (sec/100cc) 538 Chef Yield 200/260 smoothness (T/W) 403 Mullen burst...5 (psi) 4 To 1 Ermen Dorref 25/31 tear (g) (MD/CD) 511 MIT fold 210 (MD/CD) 494 Tension 4. l/2.4 5,6/2.8 (lb/in) (MD/CD) 494 Elongation (%) 4.376.5 (MD/CD) ・494 TEA (ft-2, 171, 61b/ft2) (To ID/CD) 452 GE gloss 93.3 93.9 (%) 425 Opacity 97.1 96.6 (%) 113 Ash content (%) 0.0 3.0 −−−−−−−−−−−−−−−−−−−−−−−−−− −−−−−−−−−−−−−−−−−−1−−−−−−−−−|−−−−−−−−1 According to another preferred embodiment of the invention, the web is made of shredded polyester polyester fibers and bicomponent polyester/copolyester core/sheath binder fibers fibers and PN2,1\)\inter fibers. Each bicomponent binder fiber is Cobo 1) Has a polyester core surrounded by an ester sheath. Wet method After drying the deposited (wet deposited) sheet, the base sheet is dried. The fibers are bonded to both sides of the sheet by thermally bonding them at a predetermined temperature and pressure. Adds strength to the material. Next, the glass transition temperature (T, ) of O to 30°C is applied to the sheet. Coating with ethylene vinyl acetate latex. In this case too, the latte The mixture contains calcium carbonate, titanium dioxide, clay, talc and other inorganic pigments. Pigments such as these can be blended in a pigment/binder ratio of 0.5/1 to 8/l. I can do it. The synthetic paper according to these examples does not contain cellulose fibers, so the synthetic paper Formed paper can be recycled without any separation process.

According to a first example of a synthetic paper based on polyester according to the invention, the starting fiber material is 77% by weight Kuraray polyester shredded strands, 19% by weight Kuraray N-720 polyester/copolyester core/sheath binder fiber, 4 wt. % Kuraray 105-2 PVA binder fiber. Both of these fibers are In the United States, 335 Avenue, Madison, New York, NY It is commercially available from Itochu Corporation, located at Itochu Corporation.

Kuraray shredded polyester staple fibers have an average length of 10mm and a denier is 0.4. Kuraray N720 polyester/copolyester core/sea The binder fibers have an average length of 10 mm and a denier of 2.0. claray The 105-2 PVA binder fibers have an average length of 5 mm and a denier of 2.0. Ru.

According to a second example of a synthetic paper based on polyester according to the invention, the starting fiber material is made of 80wt% Kuraray polyester shredded strands and 20wt% Kuraray polyester shredded strands. N-720 polyester/copolyester core/sheath binder fiber . No Kuraray 105-2 PVA binder fibers were used.

Alternatively, in polyester-based synthetic paper, Kuraray shredded polyester Instead of tell staple fibers, the average length is 5 mm and the denier is 0.5, etc. Using Teijin polyester staple fiber in weight percent You can also According to another variant, instead of PVA binder fibers, equal weight It is also possible to use polyethylene pulp.

According to yet another variant, the chopped polyester staple fibers are either web or thermally cured. Sufficient P V A bis to hold the web together as it is fed to the printer. Binder fiber or polyester/copolyester core/sheath binder fiber or a combination of both. Next, the thermal calendar is about 182 (360-4] O'F) [preferably about 199°C (390-4] O'F) °F) and 2°8 kg/cm” (40 ps i) or more Use a roll with a pressure of [preferably 3.5 kg/cm2 (50 ps i)] to melt the chopped polyester staple fibers. The obtained base sea 1 is , can optionally be coated with a pigmented binder as described above. Ru.

The fiber composition of polyester-based synthetic paper is It is not limited to The amount of PVA binder fibers varies from O to 10% by weight. Copolyester/polyester sheath/core binder fiber The amount can vary from 0 to 40% by weight, including polyester staple fibers. The amount of fiber can vary from 50 to 90% by weight. Furthermore, shredded The average length and denier of the polyester staple fibers were 5 to 5, respectively. Can be varied in the range of 12 mm and 0.4 to 1.5 denier, Average length and density of polyester/polyester sheath/core binder fibers The bars range from 5 to 12 mm and from 2.0 to 6.0 denier, respectively. It can be changed by surrounding.

According to the second preferred embodiment coating, the starting coating material contains 50 % by weight of Bynac 884 ethylene vinyl acetate latex and 50% by weight of aluminum. Baglos calcium carbonate. Alternatively, Airflex 4514 ethylene Vinyl acetate/ethylene vinyl chloride copolymer latex was Binac 88 can be used in place of vinyl acetate latex. j5 using 4 ethylene vinyl acetate latex is preferred. Assembled into coating The range of calcium carbonate to be added is from 0°5/1 to 8/1 in terms of pigment/binder ratio. The preferred ratio is 1/1. ethylene vinyl acetate The glass transition temperature 1゛5 of Lulatex can be varied in the range of 0°C to 30°C. can.

The web material F4 according to the second preferred embodiment can be produced on standard paper making equipment or non-woven equipment. You can make it. Polyester Cut Staple Fiber, Polyester/Copoly Ester core/sheath binder fiber and polyvinyl alcohol binder fiber is pre-dissolved in C store at a level of 0.5% based on the weight of polyester fibers. Water containing a surfactant such as Milpase T and being agitated Add to. Miles T is an IC Americas Inc. (1, C, 1, Americas, Inc.). Wear.

The above fiber components are (N polyvinyl alcohol binder fiber, (2) polyester (3) shredded polyester core/sheath binder fibers The staple fibers should be added to the blending container in that order. blending container The consistency of the mixture should be between 0.5 and 2.5% solids. . Fiber weight of anionic polyacrylamide such as 87PO61 fiber dispersion at levels ranging from 0.5 to 8.0 bonds/ton. can be promoted. 87PO61 is Nalco Chemical (Nalco Ch It can be obtained commercially from Then stir the mixture and Obtain a uniform dispersion of all materials. The refining process and waste paper recovery are performed in a second preferred manner. In the embodiment, it can be ignored (doesn't need to be done).

A head box of 0.7 to 0.01% is then produced in standard wet-laid papermaking equipment. Cusconcystincy to form a composition. Then wet deposition (wet deposition) The material is dried in the dryer section.

The dried web is calendered between smooth metal rolls heated to 196°C. Process. The web is calendered at minimum pressure, i.e. 50-150 PLI. The surface fibers are bonded while maintaining the original opacity of the sheet.

This material is then coated with ethylene vinyl acetate latex pigmented with calcium carbonate. Treat with a solution of alcohol. As mentioned above, processing is carried out on the size press of the paper machine or on any This can be done with any type of off-line coating or impregnating machine. Kotei The loading is 10% by weight dry coating solids, i.e. 200 bonds/ It is done in such a way that tons are obtained. The coating is then dried. Cotin After drying, the coated web is supercalendered and A surface smoothness (shelf yield) of 25 to 250 units is obtained.

Table II shows the physical properties of the label paper according to the first example of the second preferred embodiment of the present invention. Shown below.

Table II Physical property test data TAPPI Physical Uncoated Thermal Bond Finish Coating No. Characteristics Ting Sheet To-tin 410 basic weight (3300 "t, 2) 45.0 45.0 51.34+1 Caliper (mi l) +5.6 4.8 7.9251 Porosity -1921338 Transparency Frazier Air (cfm) 151 Teiba V-5 Okari 1.9/], 4 1.110.9 4.2/2. 5 (gem) (MD/CD) 403 Mullen Burst 13 126 183 (psi) 414 Elmendorf 233/261 229/168 184/138 pull split (g) (MD/CD) 511 MIT7t-old 3/6 2500+ 2500+ (Sen D/CD) /2500+ /2500+494 Tensile 4.7/4.6 25,0 33. 2 (lb/in) /25.0 /43.2 (MD/CD) 494 Elongation (%) 1.4/2.2 11.2 12.3 (MD/CD) / 10.7 /15.8494 TEA (ft-0,7/1.3 32.9 40 ．． 41b/ft2) /32,1' /72.9452 GE gloss 82.5 86.9 85.6 (%) 425 Opacity 69.0 74.2 76.5 (%) Examining the effect of PVA fiber level on the strength of synthetic paper made from polyethylene panoσ. We conducted a test to find out. The results of these tests are shown in Table III. these From the results, the tear and tensile strength of synthetic paper is 7.5% by weight of PVA binder. At the fiber level, it was found to be better than 4% or 11% by weight. Ru.

4% 7.5% 11% Basic weight (GMS/m2) 77 78 72 Caliper (mil) 7,6 7 ．． 8 7.7 Galley porosity 24 19 +6 (sec/100cc) Mute unburst (psi) 10! I 6 Elmendo 1 [) 3915 1 45151 37/45 tear (g) (MD/CD) MIT7t-'i (sa ID/CD) I6/3 23/10] 1/4 tension 5.3/3.8 6.3/4. l 5.3/3.1 (lb/in) (MD/C D) GE gloss (%) 95.2 95.0 94.3 Un-4-Bundle-,,(Sk)-- ---------1----------Present Shoichi----------1-p-, 2. −I 11------1--Current|J- Table IV shows that when polypropylene staple fibers with a length of 10 mm are added to the composition. This shows the effect of The three samples tested were: (A) Mitzi 9400; 90% polyethylene pulp, 10% PVA binder fiber and staple fiber O (B) Mitsui 9400 polyethylene pulp 90%, PVA binder fiber 0% and 10% staple fiber, (C) 85% Mitsui 9400 polyethylene pulp , 7.5% PVA binder fiber and 7.5% staple fiber. It was something. Tear strength is improved by the addition of staple fibers and Such improvements are greatest when binder fibers are included. Porosity is the large diameter As the level of fibers (binder fibers and stay-pull fibers) increases, To increase. Therefore, for applications where minimum porosity or specific porosity levels are required. On the other hand, when designing synthetic paper, the porosity of the sheet can be controlled.

Table IV Effect of adding staple fiber Basic weight (GMS/m2) 67 85 67 Caliba (mil) 9 II 9 Porosity (see/1oocc) 18 12 13 Tear strength 26/30 3 9/39 51155 (g) (MD/CD) Table V shows the effect of coating or size pressing the binder. . The main effect targeted is surface strength, where the surface of the web is similar to the printing plate. can be printed on the web without being damaged by sticky ink. The goal is to ensure that The IGT number indicates the improvement when a coating is applied. show. (IGT is a standard laboratory printing test in which the material is oriented perpendicular to the sheet. If the material is susceptible to . ) Carefully formulated coatings can also provide low F porosity. Tsuyoshi The properties can be increased or unchanged by careful selection of the binder. can be left in the state.

Therefore, according to the present invention, the porosity of synthetic paper can be controlled by carefully adjusting the formulation of the coating. It can be controlled by adjusting the amount of staple fibers.

Table■ Coating effect Issei Issei parable - Sakaki - Yu - Hibiki - Cloudyang Issemi - Yukyo's suffering - Engu -----Yo parable - Shizuka 1 tatami --- 1-■ Parable --- 1 tatami --- Tatami 1 --- 11 tatami 1 --- −−Tatami−−−Bannai−−Yuichiichi physical uncoated finish” Nige Kochii special− Gender----11------m----Du2 3-2 2----1--1--1 --Ichinogu 2 Nito --Basic weight (GSM) 60 80 Tensile 3.5/2.5 615 (lb/in) (MD/CD) Girly porosity 1322 (see/100cc) Gloss (%) 95 95 Opacity (%) 93 93 IGT O115 Elongation (%) 6/8 13/15 Girly rigidity 28/20 35/35 Kagetsubuki ni Tomo/Bu ■λ−−−−−−−− −−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−− −−−−−−−−−|−−−111 The synthetic paper of the present invention is used for labeling blow-molded plastic containers. be able to. In particular, this label does not use adhesives during or after molding. If the main synthetic fiber component of the label (e.g. polyethylene, polyester) attached to a blow-molded container made of the same synthetic material as polypropylene or polypropylene) Moreover, it can be recycled together with the container.

According to traditional labeling done during molding of blow-molded plastic containers, Labels are fed one after another from a magazine and are molded, for example, by a vacuum-operated device. placed within.

Next, as shown in FIG. 6 of Ober et al. U.S. Pat. No. 4,986,866 mentioned above , the plastic material is extruded through a die to form a parison. In addition, here , this US patent is specifically incorporated by reference and superseded herein. Mo The mold is fixed to seal the parison, then compressed air is passed through the nozzle through the parison. Blow molding is performed by supplying it to the inside. At this time, the parison will follow the inside surface of the mold. and expand. At the same time as blow molding, Ober et al. U.S. Pat. No. 4,986,866 The heat-sealing layer of the label is pressed and fused by the outside of the parison. Finally, Cool the mold to solidify the molded container, then open the mold and insert the labeled inside. Get an empty container.

Conventional molded labels made from paper can be recycled using small pieces of paper. Recycle plastic containers to avoid contamination of plastic materials. Paper labels must be removed using solvents or mechanical means before It has the disadvantage that it does not.

Although the invention has been described in terms of preferred embodiments, it is useful in the field of textile technology and paper making. Those skilled in the art will be able to use other polymeric fibers to achieve the same advantageous results. It will be understood that In particular, polyethylene pulp and polyester shredded steel Fibers other than fibers can also be used as the main component of the fibers. for example, If polyester pulp is commercially available, Polyester fibers can be used in place of chopped polyester staple fibers. Furthermore , a suitable polymeric fiber having a lower melting point than the main component of the fiber is added to the PVA binder fiber. It can also be used instead. For example, synthetic paper based on polyester However, polyethylene pulp can also be used instead of PVA binder fibers. Wear. The invention is not limited to the use of any particular coating binder. , ethylene vinyl acetate latex and ethylene vinyl acetate/ethylene vinyl chloride Any suitable coating binder other than Lucopolylatex may also be used. Ru. Additionally, the preferred embodiments described above satisfy conditions not specified herein. It is obvious to those skilled in the art that it can be easily modified as follows.

All such changes and modifications are included within the scope and spirit of the invention as defined in the claims below. It is something that

procedural correction band August 29, 1994 1. Indication of the case 1993 Patent Application No. 512715 2. Title of the invention Recyclable polymeric synthetic paper and its manufacturing method 3, person making corrections Relationship to the incident: Patent applicant Address: 10577 Perchas, New York, United States of America Uttanville Road (no street address) Name: International Paper Company Representative: James Dabri YU, Guadrii 4, Agent Address (zip code 220) Intention Yokohama 601, 1-5-1 Asama-cho, Nishi-ku, Yokohama, Kanagawa Prefecture (1) “Description” and “Claims” 6. Contents of amendments (1) Amend the scope of claims as shown in the attached sheet.

(2) Line 10 from the bottom of page 10 of the specification to line 9 from the bottom, line 8 from the bottom of page 11 , page 14, line 14, page 19, line 15, page 23, line 5, page 25, line 21 to line 22, page 26, line 3, page 26, line 8, page 27, lines 19 to 20 , page 35, line 5, it says [ethylene vinyl acetate latex J], [polyvinegar Acid vinyl latex” is corrected.

(3) Line 9 from the bottom of page 10 of the specification, line 7 from the bottom of page 11, line 4 of page 23, On page 26, line 9, "3o" is corrected to "33".

(4) Specification page 14, lines 16 to 17, page 26, lines 1 to 2, 3 On page 5, lines 6 and 7, “Ethylene vinyl acetate/ethylene vinyl chloride copolymer Correct ``Tex'' to ``Ethylene Vinyl Chloride Polymaratex.'' .

(5) Change r18104J on page 14, line 22 of the specification to “18195-1 Corrected to 501J.

(6) From page 14, line 22 to page 15, line 1 of the specification [Tailman Street 5100" has been corrected to read "Hamilton Building 7201J.

(7) The statement “ethylene vinyl acetate” on page 20, lines 3 and 4 of the specification, Correct to "polyvinyl acetate."

The scope of the claims 1. It has a non-woven web of wet-laid thermoplastic fibers, The web is made of a predetermined polymeric material, and the web includes at least one A continuous coating of pigmented binder is formed on the surface and the predetermined polymerization The thermoplastic m-fibers are made of a material in which the binder is fused to the predetermined polymeric material. The colored binder can be cured at temperatures below the point without substantial heat fusion. A highly opaque and cellulose-free composition characterized by being bonded by paper.

2. A claim characterized in that the predetermined polymeric material is a polyolefin. Synthetic paper as described in box 1.

3. The polyolefin is polyethylene or polypropylene. Synthetic paper according to claim 2, which is characterized by:

4. The fibers made of the predetermined polymeric material are polyethylene or polypropylene. The synthetic paper according to claim 1, which is made of lopylene pulp.

5. The fiber composition of the nonwoven web is 88 to 100% olefin pulp. The polyvinyl alcohol binder fiber is 0 to 12%. Synthetic paper according to claim 4.

7. The ratio of pigment to latex should be in the range of 0.5/1 to 8/1. The synthetic paper according to claim 6, characterized by:

8. The fiber composition of the nonwoven web is 70 to 100% olefin pulp. The polyvinyl alcohol binder fiber is 0 to 12%, and the olefin steak is The composite according to claim 4, characterized in that the fiber content is 0 to 30%. Narumi paper.

9. The olefin staple fiber is polyethylene or polypropylene 9. The synthetic paper according to claim 8, characterized in that it has staple fibers.

10. made of a certain polymeric material having an outer surface and a label attached to the outer surface; In the synthetic paper having a blow-molded container, the label is defined in claim 1. The synthetic paper according to paragraph 1, wherein the synthetic paper is bonded to the outer surface of the blow molded container. , wherein at least some of the fibers are made of the predetermined polymeric material. Synthetic paper characterized by forming.

11. Nonwoven composite webs used to make cellulose-free synthetic paper It has a non-woven web of 100% thermoplastic fibers intertwined using a wet-laying method. and the thermoplastic fibers include a substantially infusible pulp made of a certain polymeric material. A nonwoven composite web comprising:

12. The predetermined polymeric material is polyethylene or polypropylene. A nonwoven composite web as claimed in claim 11.

13. The fiber composition of the nonwoven web contains only olefin pulp. The nonwoven composite web according to claim 11.

14. Nonwoven web of 100% thermoplastic fibers intertwined by wet deposition method In the composite web used to make cellulose-free synthetic paper, the web comprises 50 to 90% chopped polyester staple fibers; a thermoplastic having a melting point lower than that of the shredded polyester staple fibers; The material contains O to 40% by weight of binder fibers and O to 10% of polyvinyl alcohol. A nonwoven composite web characterized by having a fiber composition with coal binder fibers. .

15. The binder fiber has a melting point higher than that of the sheath fiber made of copolyester. The nonwoven composite according to claim 14, characterized in that it has a melting point lower than that of the nonwoven composite. Go web.

16. The web may be coated with the copolyester sheath prior to thermal calendering. or by melting the polyvinyl alcohol binder fibers or both of them. body and then melt the shredded polyester staple fibers. The nonwoven composite according to claim 14, characterized in that the nonwoven composite is thermally calendered to web.

17. The web is made of the copolyester sheath or the polyvinyl aluminum The coal binder fibers or both are held together by melting and then a small Impregnation with a continuous coating of pigmented binder on at least one side The nonwoven composite web according to claim 14, characterized in that:

18. Thermoplastic fibers 100 made entirely or mostly of certain polymeric materials forming a nonwoven web comprising % by wet deposition; drying the wet deposited web at a temperature below the melting point of the predetermined polymeric material; drying to remove excess water; and reducing the amount of the dried nonwoven web. The process of impregnating one side with a pigmented binder to form a continuous coating. and.

curing the binder at a temperature lower than the melting point of the predetermined polymeric material; Manufacture of synthetic paper with high opacity and no cellulose, characterized by Method.

19. The thermoplastic fiber made of the predetermined polymeric material is olefin pulp. The method for producing synthetic paper according to claim 18, characterized in that:

20. The woven fiber composition of the nonwoven web is olefin pulp of 88 to 10 0%, and the polyvinyl alcohol binder fiber is 0 to 12%. A method for producing synthetic paper according to claim 19.

21. The binder includes polyvinyl acetate, and the ratio of pigment to latex is Claim 18, characterized in that it is in the range of 0.5/l to 8/1. A method for producing synthetic paper.

22. The fiber composition of the nonwoven web is 70 to 100% olefin pulp. 0 to 12% polyvinyl alcohol binder fiber, olefin Claim 19, characterized in that the fiber content is 0 to 30%. A method for producing synthetic paper.

23. Nonwoven containing 100% thermoplastic pulp made entirely of olefin materials a step of forming a web by a wet deposition method; drying at a temperature lower than the melting point of the olefin material to remove excess water; Ingredients used in the production of cellulose-free synthetic paper characterized by Method of manufacturing woven composite web.

24. A pigment-colored band is provided on at least one side of the nonwoven web that has been subjected to the drying process. impregnating the inda to form a continuous coating; curing the binder at a temperature lower than the melting point of the olefin material; A method for producing synthetic paper according to claim 23, further comprising: .

25. The fiber made of the predetermined polymeric material is an olefin polymer. 24. The method for producing synthetic paper according to claim 23.

26. 50 to 90% shredded polyester staple fiber, binder fiber Wet process from a 1oO% dispersion of thermoplastic fibers with a fiber composition of 10 to 50% forming a nonwoven web by a deposition method and transporting said web to a subsequent processing step; During this process, the polyester stable fibers obtained by shredding the binder fibers are melted. melting the web at a temperature to hold the web together. A nonwoven composite web used in the production of cellulose-free synthetic paper characterized by Production method.

27. The fiber composition of the dispersion is such that the shredded polyester stable fibers are 50% to 90%, with copolyester/polyester sheath/core binder fibers of 1 0 to 40% polyvinyl alcohol binder A method for producing a nonwoven composite web according to item 26.

28. The subsequent treatment step involves melting the shredded polyester stable fibers. The inconvenience according to claim 26, characterized in that it is a thermal calendering treatment that melts. Method of manufacturing composite web.

29. The subsequent treatment step includes coloring at least one side of the web with a pigment. Claim characterized in that it is impregnated with a continuous coating of a binder. A method for producing a nonwoven composite web according to item 26.

30, a synthetic paper having a nonwoven web of wet-laid synthetic fibers, the synthetic The fibers include binder fibers and polymeric pulp or shredded polymeric staple fibers. , the polymerized pulp or shredded polymeric staple fibers are The polymeric pulp or shredded polymeric staple fibers are processed without substantially melting. Melting the binder fibers at a temperature lower than the melting point of the cut polymeric staple fibers. A highly opaque, cellulose-free composite characterized by being bonded by Narumi paper.

Continuation of front page (51) Int, C1,' Identification symbol Internal office reference number D21H13/24 (31) Priority claim number 004,881 (32) Priority mill January 19, 1993 Japan (33) Priority claim country United States (US) (81) Designated country EP (AT, BE , C.H., D.E.

DK, ES, FR, GB, GR, IE, IT, LU, MC, NL, PT, S E), CA, JP, KRI D21H1/22 Z (72) Inventor Monroe, Stephen H.

United States 38138 Tennessee Germantown Kim Ridge Live (72) Inventor: Angelini, Peter Jay.

United States 10917 New York Central Valley Middran Avenue 57 Star Route 56 (72) Inventor: Poylan, John Earl.

United States of America 18950 Newton, Pennsylvania Grand Street REIT

Claims (30)

[Claims] 1. having a nonwoven web of wet-laid thermoplastic fibers, all of said thermoplastic fibers or substantially made of a polymeric material, said web having at least one side. A continuous coating of pigmented binder is formed on the predetermined polymeric material. The thermoplastic fibers are made of a polymeric material that binds the binder to a melting point of the predetermined polymeric material. The colored binder without substantial heat fusion by curing at a temperature lower than Synthetic paper with high opacity and no cellulose, characterized by being bonded by . 2. Claims characterized in that the predetermined polymeric material is a polyolefin. Synthetic paper according to paragraph 1. 3. The polyolefin is preferably polyethylene or polypropylene. Synthetic paper according to claim 2, characterized in that it is characterized by: 4. The fibers made of the predetermined polymeric material may be polyethylene or polypropylene. The synthetic paper according to claim 1, which is made of pyrene pulp. 5. The fiber composition of the nonwoven web is 88 to 100% olefin pulp. , characterized in that the content of polyvinyl alcohol binder fibers is 0 to 12%. Synthetic paper as described in item 4 of the scope of demand. 6. Claims characterized in that the binder comprises ethylene vinyl acetate. Synthetic paper according to scope 1. 7. The pigment to latex ratio should be in the range of 0.5/1 to 8/1. Synthetic paper according to claim 6 characterized by: 8. The fiber composition of the nonwoven web is 70 to 100% olefin pulp. , 0 to 12% polyvinyl alcohol binder fiber, and olefin stay Synthesis according to claim 4, characterized in that the content of bull fibers is from 0 to 30%. paper. 9. The olefin stable fibers are polyethylene or polypropylene stable fibers. 9. The synthetic paper according to claim 8, characterized in that it has fibers. 10. made of a predetermined polymeric material having an outer surface and a label affixed to the outer surface. In the synthetic paper having a blow-molded container, the label is defined in claim 1. , wherein the synthetic paper is bonded to the outer surface of the blow molded container; At least some of the fibers are made of the synthetic paper made of the predetermined polymeric material. Synthetic paper characterized by forming. 11. Non-woven composite web used to make cellulose-free synthetic paper It has a nonwoven web of 100% thermoplastic fibers intertwined by a wet deposition method. , the thermoplastic fibers comprising a substantially infusible pulp made of a polymeric material. A non-woven composite web characterized by: 12. The predetermined polymeric material is polyethylene or polypropylene. A nonwoven composite web according to claim 11. 13. The fiber composition of the nonwoven web is characterized in that it contains only olefin pulp. The nonwoven composite web according to claim 11. 14. Contains a non-woven web of 100% thermoplastic fibers intertwined by wet deposition. and in nonwoven composite webs used to make cellulose-free synthetic papers. , the web comprises 50 to 90% shredded polyester stable fibers and A thermoplastic material with a melting point lower than that of shredded polyester stable fibers. 0 to 40% by weight of binder fibers containing It has a fiber composition of 0 to 10% polyvinyl alcohol binder fiber. A nonwoven composite web characterized by. 15. The binder fiber has a core made of copolyester and polyester. a bicomponent woven fiber having a sheath made of said polyester sheath; Have a melting point lower than the melting point of shredded polyester stable fibers The nonwoven composite web according to claim 14, characterized by: 16. The web is coated with the polyester sheath or The polyvinyl alcohol binder fibers or both of these can be melted to form an integral bond. held and then heated to melt the shredded polyester stable fibers. The nonwoven composite wafer according to claim 14, characterized in that it is calendered. Bu. 17. The web includes the polyester sheath or the polyvinyl alcohol. The binder fibers or both are held together by melting, and then at least Also impregnated with a continuous coating of pigmented binder on one side A nonwoven composite web according to claim 14. 18. 100% thermoplastic fibers made entirely or mostly of selected polymeric materials forming a nonwoven web comprising a wet deposition method; drying the wet deposited web at a temperature below the melting point of the predetermined polymeric material; drying to remove excess water; The process of impregnating one side with a pigmented binder to form a continuous coating. and, curing the binder at a temperature lower than the melting point of the predetermined polymeric material; Manufacture of synthetic paper with high opacity and no cellulose, characterized by Method. 19. The thermoplastic fiber made of the predetermined polymeric material is olefin pulp. 19. The method for producing synthetic paper according to claim 18. 20. The fiber composition of the nonwoven web is 88 to 100% olefin pulp. , characterized in that the content of polyvinyl alcohol binder fiber is 0 to 12%. A method for producing synthetic paper according to claim 19. 21. The binder includes ethylene vinyl acetate and binds to the latex of the pigment. Claim 18, characterized in that the ratio is in the range of 0.5/1 to 8/1. Method of manufacturing the synthetic paper described. 22. The fiber composition of the nonwoven web is 70 to 100% olefin pulp. The polyvinyl alcohol binder fiber is 0 to 12%, and the olefin steak is Claim 19, characterized in that the fiber content is 0 to 30%. Method of manufacturing synthetic paper. 23. Non-woven wool containing 100% thermoplastic pulp made entirely from olefin materials a step of forming an ebb by a wet deposition method; drying the wet deposited web at a temperature below the melting point of the olefinic material; a step of drying to remove excess water. A method for producing a non-woven composite web used in the production of non-woven synthetic paper. 24. A pigment-colored bicarbonate is applied to at least one side of the dried nonwoven web. impregnating a powder to form a continuous coating; curing the binder at a temperature lower than the melting point of the olefin material; A method for producing synthetic paper according to claim 23, further comprising: . 25. The fiber made of the predetermined polymeric material is an olefin-in pulp. The method for producing synthetic paper according to claim 23, characterized in that: 26. 50-90% shredded polyester stable fiber, binder fiber wet deposition from a dispersion of 100% thermoplastic fibers with a fiber composition of 10% to 50%. forming a nonwoven web by a stacking method; When the web is transferred to a subsequent processing step, the binder fibers are transferred to the shredded port. The polyester stable fibers melt at a temperature that does not melt and keep the web together. Manufacture of cellulose-free synthetic paper characterized by comprising the steps of: A method for manufacturing a nonwoven composite web used for. 27. The fiber composition of the dispersion is such that the shredded polyester stable fibers are Up to 90% polyester/copolyester sheath/core binder fibers 40% and 0 to 10% polyvinyl alcohol binder fiber. A method for producing a nonwoven composite web according to claim 26. 28. The subsequent processing step involves melting the shredded polyester stable fibers. The nonwoven composite according to claim 26, characterized in that the nonwoven composite is subjected to a thermal calendering treatment to A method for manufacturing a mating web. 29. The subsequent treatment step includes pigmenting at least one side of the web. impregnated with a continuous coating of a binder. A method for producing a nonwoven composite web according to Scope 26. 30. A synthetic paper having a nonwoven web of wet-laid synthetic fibers, the synthetic paper comprising: The fibers include binder fibers and polymerized pulp or shredded polymeric stable fibers. , the polymerized pulp or shredded polymeric stable fibers are The polymeric pulp or shredded polymeric stable fibers are processed without substantially melting. Melting the binder fibers at a temperature lower than the melting point of the cut polymeric stable fibers. A highly opaque, cellulose-free composite characterized by being bonded by Narumi paper.