Non-Toxin Adhesiveless Slipper and Processing Method Thereof

Abstract

Non-toxin adhesiveless slipper includes an upper portion and a lower portion; wherein the upper portion and the lower portion are bonded with each other by an adhesive film. A processing method for bonding an upper portion and a lower portion together, including steps of: a. heat melting the EVA and the EAA to form a fluid compound, and blowing the fluid compound on a bottom surface of the upper portion to form an adhesive film; b. placing an isolated paper on the adhesive film; c. placing the upper portion into a heat-pressing machine to ensure the adhesive film and isolated paper securely attached on the bottom surface of the upper portion; d. placing a rubber sheet on a mold to process a heat pressing and then removing the remaining rubber on the contours of the mold to form the lower portion; e. placing the upper portion and the lower portion into a sectional die, and then processing the heat-pressing.

Description

NOTICE OF COPYRIGHT

A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to any reproduction by anyone of the patent disclosure, as it appears in the United States Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever.

BACKGROUND OF THE PRESENT INVENTION

Field of Invention

The present invention relates to a slipper, and more particularly to a non-toxin adhesiveless slipper and its processing method.

Description of Related Arts

Traditional shoe soles are made of rubber materials and vulcanizing agents, such as butadiene rubbers and styrene-butadiene rubbers, and then the processing oil and the silicon dioxide are added into the rubber materials and the vulcanizing agents to process the regular vulcanization to form raw materials for the shoe soles, wherein these raw materials have a good abrasion resistance. However, these raw materials have several drawbacks. These raw materials for shoe soles are not thermoplastic materials, and cannot be recycled.

Thermoplastic rubbers are well-known recyclable materials. In other words, the thermoplastic rubbers are eco-friendly materials. Therefore, the thermoplastic rubbers can be used to replace the traditional shoe sole materials (styrene-butadiene rubbers and butadiene rubbers).

In addition, in the traditional manufacturing process for the slipper, an upper portions of the slippers are bonded on the shoe soles by glues. However, gases may retained inside the glues to reduce the adhesive ability of the glues. In this manner, the upper portions of the slippers are easily to be detached from the shoe soles, especially after the slippers are soaked into the water. During the manufacturing process, the glues are always toxic substances, so the glues not only is harmful for the human bodies, but also is a non-eco-friendly materials. Therefore, an adhesiveless slipper is highly desired in order to solve the above mentioned problems.

SUMMARY OF THE PRESENT INVENTION

The invention is advantageous in that it provides a non-toxin adhesiveless slipper, wherein an upper portion and a lower portion of the non-toxin adhesiveless slipper are made of eco-friendly material, and in such a manner, the non-toxin adhesiveless slipper can be recycled.

Another advantage of the invention is to provide a non-toxin adhesiveless slipper, wherein an adhesive film is provided to attach on a bottom surface of the upper portion for bonding the lower portion of the non-toxin adhesiveless slipper with the upper portion thereof, and in other words, no glue is applied in the present invention.

Another advantage of the invention is to provide a non-toxin adhesiveless slipper, wherein no toxic substance is released and applied during the upper portion thereof and the lower portion thereof are attached with each other, so as to reduce the possibility for polluting the environment.

Another advantage of the invention is to provide a non-toxin adhesiveless slipper, wherein no expansive or complicated structure is required to employ in the present invention in order to achieve the above mentioned advantages. Therefore, the present invention successfully provides an economics and efficient solution for providing more eco-friendly slippers without affecting the main structure of the slippers.

Additional advantages and features of the invention will become apparent from the description which follows, and may be realized by means of the instrumentalities and combinations particular point out in the appended claims.

According to the present invention, the foregoing and other objects and advantages are attained by a non-toxin adhesiveless slipper, comprising:

an upper portion and a lower portion; wherein

the upper portion and the lower portion are bonded with each other by an adhesive film.

In accordance with another aspect of the invention, the present invention comprises a processing method for bonding a upper portion and a lower portion of a non-toxin adhesiveless slipper with each other, wherein the processing method comprises steps of:

a. heat melting the EVA and the EAA to form a fluid compound, and blowing the fluid compound on a bottom surface of the upper portion of the non-toxin adhesiveless slipper to form an adhesive film;

b. placing an isolated paper on the adhesive film;

c. placing the upper portion (the adhesive film and the isolated paper are already placed thereon) into a heat-pressing machine for 16-20 seconds, and the temperature of the heat-pressing machine is around 150° C. to 180° C., so as to ensure the adhesive film and isolated paper securely attached on the bottom surface of the upper portion;

d. placing a rubber sheet on a mold to process a heat pressing for 45-60 seconds, and the pressing temperature is around 150° C. to 180° C., and then removing the remaining rubbers on the contours of the mold to obtain a lower portion of the non-toxin adhesiveless slipper; and

e. placing the upper portion and the lower portion into a sectional die, and then processing the heat-pressing for 240-300 seconds, and the heat-pressing temperature is around 150° C. to 200° C. in order to combine the upper portion and the lower portion to form an integrity.

Still further objects and advantages will become apparent from a consideration of the ensuing description and drawings.

These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The following description is disclosed to enable any person skilled in the art to make and use the present invention. Preferred embodiments are provided in the following description only as examples and modifications will be apparent to those skilled in the art. The general principles defined in the following description would be applied to other embodiments, alternatives, modifications, equivalents, and applications without departing from the spirit and scope of the present invention.

A non-toxin slipper according to a preferred embodiment of the present invention is illustrated, wherein the non-toxin slipper comprises an upper portion and a lower portion, wherein the upper portion is embodied as a shoe pad and the lower portion is embodied as a shoe sole. The main materials of the lower portion are natural rubbers and ethylene propylene rubbers. The raw materials of the lower portion comprises natural rubber, ethylene propylene rubbers, white mineral oil, white carbon, polypropylene, starch-filled substance, vulcanization accelerator, and stearic acid, and the weight ratio of the natural rubber, ethylene propylene rubbers, white mineral oil, white carbon, polypropylene, starch-filled substance, vulcanization accelerator, and stearic acid is 40:33:17:5:5-15:6-15:2-5:3.

It is worth to mention that the lower portion of the non-toxin adhesiveless slipper can be made of synthetic rubbers. Furthermore, the lower portion of the non-toxin adhesiveless slipper also can be made of the thermoplastic polyolenfin, wherein the thermoplastic polyolenfin comprises ethylene propylene, white mineral oil, and isoprene, wherein the weight ratio of the ethylene propylene, white mineral oil, and is 33-37:14-17:46-53.

Accordingly, the upper portion of the non-toxin adhesiveless slipper are made of EVA components, wherein the EVA components comprises EVA, polyoxyethylene, filling agent, natural particles, cross-linking agent, zinc oxide, foaming agent, and stearic acid, wherein the weight ratio of EVA, polyoxyethylene, filling agent, natural particles, cross-linking agent, zinc oxide, foaming agent, and stearic acid is 10-20:30-40:10-15:30-40:0.5-5.5:2.0-3.0:0.8-5.8:10-20.

Accordingly, the lower portion and the upper portion of the non-toxin adhesiveless slipper are bonded with each other by an adhesive film, wherein the adhesive film is a non-toxin adhesive film. The adhesive film is a compound film which is made of EAA(ethylene acrylic acid) and EVA (ethylene-vinyl acetate), and the weight ratio of EAA and EVA is 80-86:14-20. It is worth to mention that the adhesion rate of the adhesive film is larger than the PE (polyethylene) film. Alternatively, the adhesive film also can be a composite PE film, wherein the composite PE film comprises low density polyethylene and linear and low density polyethylene.

A processing method for bonding the upper portion of the non-toxin adhesiveless slipper on the lower portion of the non-toxin adhesive slipper according to the above mentioned preferred embodiment of the present invention is illustrated, wherein the processing method comprises steps of:

a. heat melting the EVA and the EAA to form a fluid compound, and blowing the fluid compound on a bottom surface of the upper portion of the non-toxin adhesiveless slipper to obtain an adhesive film;

b. placing an isolated paper on the adhesive film;

c. placing the upper portion (the adhesive film and the isolated paper are already placed thereon) into a heat-pressing machine for 16-20 seconds, and the temperature of the heat-pressing machine is around 150° C. to 180° C., so as to ensure the adhesive film and isolated paper securely attached on the bottom surface of the upper portion.

d. placing a rubber sheet on a mold to process a heat pressing for 45-60 seconds, and the pressing temperature is around 150° C. to 180° C., and then removing the remaining rubber on the contours of the mold to obtain a lower portion of the non-toxin adhesiveless slipper; and

e. placing the upper portion and the lower portion into a sectional die, and then processing the heat-pressing for 240-300 seconds, and the heat-pressing temperature is around 150° C. to 200° C. in order to combine the upper portion and the lower portion to form an integrity.

In the step a, the adhesive film is a porous film. It is worth to mention that some gases may be released after the EVA material is heated, so the gases may attached on the adhesive film to cause the broken film, and then the adhesive ability of the adhesive film will be reduced.

In the step d, the sizes and shapes of the lower portion of the non-toxin adhesiveless slipper are the same as that of the upper portion thereof.

EXPERIMENTAL EXAMPLES

The non-toxin adhesiveless slipper prepared according to a preferred embodiment of the present invention is tested by the following toxic substance: alkylphenol & alkylphenolethoxylate, banned azo dyes, chlorobenzene and chlorotoluene, chlorophenols, chlorinated solvents, flame retardant, heavy metals, organotin compounds, phthalates, perfluorooctanesulfonates & perfluorooctanoic acid, and shot-chain chlorinated paraffins. The non-toxin adhesiveless slipper is tested which comprises the upper portion M1 and the lower portion M2.

The test method for alkylphenol & alkylphenolethoxylate is performed as specified in ISO 18218 (modified). The results from the upper portion M1 and the lower portion M2 are shown in Table 1. Remark:-n.d.=not detected.

TABLE 1
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
Nonylphenol (NP)	25154-52-3	5	n.d.	n.d.
Octylphenol (OP)	27193-28-8	5	n.d.	n.d.
Nonylphenolethoxylate	9016-45-9	5	n.d.	n.d.
(NPEO)
Octylphenolethoxylate	9002-93-1	5	n.d.	n.d.
(OPEO)

The test method for banned azo dyes is performed as specified in GB/T 17592-2011 & GB/T 23344-2009 for 4-aminozobenzene (modified). The results from the upper portion M1 and the lower portion M2 are shown in Table 2. Remark:-n.d.=not detected.

TABLE 2
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
Biphenyl-4-ylamine	92-67-1	5	n.d.	n.d.
Benzidine	92-87-5	5	n.d.	n.d.
4-Chloro-o-toluidine	95-69-2	5	n.d.	n.d.
2-Naphthylamine	91-59-8	5	n.d.	n.d.
4-amino-2′,3-	97-56-3	5	n.d.	n.d.
dimethylazobenzene
5-nitro-o-toluidine	99-55-8	5	n.d.	n.d.
4-chloroaniline	106-47-8	5	n.d.	n.d.
4-methoxy-m-	615-05-4	5	n.d.	n.d.
phenylenediamin
4,4′-methylenedianiline	101-77-9	5	n.d.	n.d.
3,3′-dichlorobenzidine	91-94-1	5	n.d.	n.d.
3,3′-dimethoxybenzidine	119-90-4	5	n.d.	n.d.
3,3′-dimethylbenzidine	119-93-7	5	n.d.	n.d.
4,4′-methylenedi-o-toluidine	838-88-0	5	n.d.	n.d.
6-methoxy-m-toluidine	120-71-8	5	n.d.	n.d.
4,4′-methylene-bis-(2-	101-14-4	5	n.d.	n.d.
chloro-aniline)
4,4′-oxydianiline	101-80-4	5	n.d.	n.d.
4,4′-thiodianiline	139-65-1	5	n.d.	n.d.
o-Toluidine	95-53-4	5	n.d.	n.d.
4-methyl-m-	95-80-7	5	n.d.	n.d.
2,4,5-Trimethylaniline	137-17-7	5	n.d.	n.d.
o-anisidine	90-04-0	5	n.d.	n.d.
4-aminoazobenzene	60-09-3	5	n.d.	n.d.
2,4-Dimethylaniline	95-68-1	5	n.d.	n.d.
2,6-Dimethylaniline	87-62-7	5	n.d.	n.d.

It is worth to mention that 4-amino-2′,3-dimethylazobenzene (CAS No. 97-56-3) and 5-nitro-o-toluidine (CAS No. 99-55-8) are further reduced into o-toluidine (CAS No. 95-53-4) and 4-methyl-m-phenylenediamine (CAS No. 95-80-7). In case of that polyurethane materials are used, it cannot be ruled out that certain amines, e.g. 4,4′-methylenedianiline (MDA, CAS No. 101-77-9) and 4-methyl-m-phenylenediamine (TDA, CAS No. 95-80-7) are released from the PU component and not from a banned azo colorant.

The test method for chlorobenzene and chlorotoluene is performed as specified in GB/T 20384-2006 (modified). The results from the upper portion M1 and the lower portion M2 are shown in Table 3. Remark:-n.d.=not detected.

TABLE 3
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
1,2,3,4-Tetrachlorobenzene	634-66-2	0.10	n.d.	n.d.
1,2,3,5-Tetrachlorobenzene	634-90-2	0.10	n.d.	n.d.
1,2,3-Trichlorobenzene	87-61-6	0.10	n.d.	n.d.
1,2,4,5-Tetrachlorobenzene	95-94-3	0.10	n.d.	n.d.
1,2,4-Trichlorobenzene	120-82-1	0.10	n.d.	n.d.
1,2-Dichlorobenzene	95-50-1	0.10	n.d.	n.d.
1,3,5-Trichlorobenzene	108-70-3	0.10	n.d.	n.d.
1,3-Dichlorobenzene	541-73-1	0.10	n.d.	n.d.
1,4-Dichlorobenzene	106-46-7	0.10	n.d.	n.d.
2,3,4,5,6-Pentachlorotoluene	877-11-2	0.10	n.d.	n.d.
2,3,6-Trichlorotoluene	2077-46-5	0.10	n.d.	n.d.
2,4-Dichlorotoluene	95-73-8	0.10	n.d.	n.d.
2,5-Dichlorotoluene	19398-61-9	0.10	n.d.	n.d.
2,6-Dichlorotoluene	118-69-4	0.10	n.d.	n.d.
2-Chlorotoluene	95-49-8	0.10	n.d.	n.d.
3,4-Dichlorotoluene	95-75-0	0.10	n.d.	n.d.
3-Chlorotoluene	108-41-8	0.10	n.d.	n.d.
4-Chlorotoluene	106-43-4	0.10	n.d.	n.d.
a,a,a-4-Tetrachlorotoluene	5216-25-1	0.10	n.d.	n.d.
Hexachlorobenzene	118-74-1	0.10	n.d.	n.d.
Pentachlorobenzene	608-93-5	0.10	n.d.	n.d.
Tetrachloro-m-xylene	877-09-8	0.10	n.d.	n.d.

The test method for chlorophenols is performed as specified in ISO 17070: 2015 (IULTCS/IUC 25). The results from the upper portion M1 and the lower portion M2 are shown in Table 4. Remark:-n.d.=not detected.

TABLE 4
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
4-chloro-3-methylphenol	59-50-7	0.05	n.d.	n.d.
(CMK)
Tetrachlorophenol (TeCP)	25167-83-3	0.05	n.d.	n.d.
2-Chlorophenol (2-CP)	95-57-8	0.05	n.d.	n.d.
3-Chlorophenol (3-CP)	108-43-0	0.05	n.d.	n.d.
4-Chlorophenol (4-CP)	106-48-9	0.05	n.d.	n.d.
2,6-Dichlorophenol (2,6-DCP)	87-65-0	0.05	n.d.	n.d.
2,5-Dichlorophenol (2,5-DCP)	583-78-8	0.05	n.d.	n.d.
2,4-Dichlorophenol (2,4-DCP)	120-83-2	0.05	n.d.	n.d.
3,5-Dichlorophenol (3,5-DCP)	591-35-5	0.05	n.d.	n.d.
2,3-Dichlorophenol (2,3-DCP)	576-24-9	0.05	n.d.	n.d.
3,4-Dichlorophenol (3,4-DCP)	95-77-2	0.05	n.d.	n.d.
2,4,6-Trichlorophenol	88-06-2	0.05	n.d.	n.d.
(2,4,6-TriCP)
2,3,5-Trichlorophenol	933-78-8	0.05	n.d.	n.d.
(2,3,5-TriCP)
2,4,5-Trichlorophenol	95-95-4	0.05	n.d.	n.d.
(2,4,5-TriCP)
2,3,4-Trichlorophenol	15950-66-0	0.05	n.d.	n.d.
(2,3,4-TriCP)
3,4,5-Trichlorophenol	609-19-8	0.05	n.d.	n.d.
(3,4,5-TriCP)
2,3,5,6-Tetrachlorophenol	935-95-5	0.05	n.d.	n.d.
(2,3,5,6-TeCP)
2,3,4,6-Tetrachlorophenol	58-90-2	0.05	n.d.	n.d.
(2,3,4,6-TeCP)
2,3,4,5-Tetrachlorophenol	4901-51-3	0.05	n.d.	n.d.
(2,3,4,5-TeCP)
Pentachlorophenol (PCP)	87-86-5	0.05	n.d.	n.d.

The test method for chlorinated solvent is performed as specified in EPA SW-846 Method 3550C, GCMS/GC-ECD. The results from the upper portion M1 and the lower portion M2 are shown in Table 5. Remark:-n.d.=not detected.

TABLE 5
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.		M1	M2
1,1,1,2-Tetrachloroethane	630-20-6	5	n.d.	n.d.
1,1,1-Trichloroethane	71-55-6	5	n.d.	n.d.
1,1,2,2-Tetrachloroethane	79-34-5	5	n.d.	n.d.
1,1,2-Trichloroethane	79-00-5	5	n.d.	n.d.
1,1-Dichloroethane	75-34-3	5	n.d.	n.d.
1,1-Dichloroethene	75-35-4	5	n.d.	n.d.
1,2-dichloroethane	107-06-2	5	n.d.	n.d.
Bromodichloromethane	75-27-4	5	n.d.	n.d.
Bromoform	75-25-2	5	n.d.	n.d.
Carbon tetrachloride	56-23-5	5	n.d.	n.d.
Chloroform	67-66-3	5	n.d.	n.d.
Cis-1,2-Dichloroethene	156-59-2	5	n.d.	n.d.
Dibromochloromethane	124-48-1	5	n.d.	n.d.
Dibromomethane	74-95-3	5	n.d.	n.d.
Hexachlorobutadiene	87-68-3	5	n.d.	n.d.
Hexachloroethane	67-72-1	5	n.d.	n.d.
Methylene chloride	75-09-2	5	n.d.	n.d.
(Dichloromethane)
Tetrachloroethene	127-18-4	5	n.d.	n.d.
Trans-1,3-Dichloropropene	10061-02-6	5	n.d.	n.d.
Trans1,2Dichloroethene	156-60-5	5	n.d.	n.d.
Trichloroethene	79-01-6	5	n.d.	n.d.
Vinyl chloride	75-01-4	5	n.d.	n.d.
indicates data missing or illegible when filed

The test method for flame retardant is performed as specified in GB/T 26125-2011. The results from the upper portion M1 and the lower portion M2 are shown in Table 6. Remark:-n.d.=not detected.

TABLE 6
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
Hexabromocyclododecane	25637-99-4	10	n.d.	n.d.
(HBCDD)
Polybrominated biphenyls	—	10	n.d	n.d.
(PBB)
Polybrominated	—	10	n.d	n.d.
diphenyl ethers
Tri-(2,3-dibromopropyl)-	126-72-7	10	n.d.	n.d.
phosphate (TRIS)
Tris(2-chlorethyl)-phosphate	115-96-8	10	n.d	n.d.
(TCEP)
Tris-(1,3-	13674-87-8	10	n.d	n.d.
dichloropropyl)-
indicates data missing or illegible when filed

The test method for heavy metals is performed as specified in QB/T 4340-2012. Analyzed by ICP-MS. The results from the upper portion M1 and the lower portion M2 are shown in Table 7. Remark:-n.d.=not detected.

TABLE 7
	Report
	Limit	Result (mg/Kg)
	Compounds	CAS No.	(mg/Kg)	M1	M2
	Cadmium (Cd)	7440-43-9	10	n.d.	n.d.
	Lead (Pb)	7439-92-1	10	n.d.	n.d.

The test method for organotin compounds is performed as specified in ISO/TS 6179:2012. The results from the upper portion M1 and the lower portion M2 are shown in Table 8. Remark:-n.d.=not detected.

	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
Tetrabutyltin (TeBT)	1461-25-2	0.02	n.d.	n.d.
Tricyclohexyltin (TrCyT)	6056-50-4	0.02	n.d.	n.d.
Monobutyltin (MBT)	78763-54-9	0.02	n.d.	n.d.
Dibutyltin (DBT)	14488-53-0	0.02	n.d.	n.d.
Tributyltin (TBT)	36643-28-4	0.02	n.d.	n.d.
Monooctyltin (MOT)	94410-07-8	0.02	n.d.	n.d.
Dioctyltin (DOT)	250252-87-0	0.02	n.d.	n.d.
Triphenyltin (TPhT)	668-34-8	0.02	n.d.	n.d.
Trioctyltin (TOT)	—	0.02	n.d.	n.d.
Tripropyltin (TPrT)	—	0.02	n.d.	n.d.

The test method for phthalates is performed as specified in ISO/TS 16181:201. The results from the upper portion M1 and the lower portion M2 are shown in Table 9. Remark:-n.d.=not detected.

TABLE 9
	Report
	Limit	Result (%)
Compounds	CAS No.		M1	M2
Di-2-ehtylhexyl phthalate	117-81-7	0.0030	0.0048	n.d.
(DEHP)
Diisobutyl phthalate (DIBP)	84-69-5	0.0030	n.d.	n.d.
Dibutyl phthalate (DBP)	84-74-2	0.0030	0.18	n.d.
Diisononyl phthalate (DINP)	28553-12-0	0.010	n.d.	n.d.
Diisodecyl phthalate (DIDP)	26761-40-0	0.015	n.d.	n.d.
Di-n-octyl phthalate (DnOP)	117-84-0	0.0030	n.d.	n.d.
Bis(2-methoxyethyl) phthalate	117-82-8	0.0030	n.d.	n.d.
(BMEP/DMEP)
Diethyl phthalate (DEP)	84-66-2	0.0030	n.d.	n.d.
Phtahalic acid,	85-68-7	0.0030	n.d.	n.d.
benzylbutyl ester (BBP)
Di-n-hexyl phthalate (DNHP)	84-75-3	0.0030	n.d.	n.d.
Dimethyl phthalate (DMP)	131-11-3	0.0030	n.d.	n.d.
Di-propyl phthalate (DPrP)	131-16-8	0.0030	n.d.	n.d.
Diisooctyl phthalate (DIOP)	27554-26-3	0.0030	n.d.	n.d.
Dicyclohexyl phthalate	84-61-7	0.0030	n.d.	n.d.
Dinonyl phthalate (DNP)	84-76-4	0.0030	n.d.	n.d.
indicates data missing or illegible when filed

The test method for perfluorooctanesulfonates & perfluorooctanoic Acid is performed as specified in CEN TS 15968: 2010(E). The results from the upper portion M1 and the lower portion M2 are shown in Table 10. Remark:-n.d.=not detected.

TABLE 10
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.	(mg/Kg)	M1	M2
Perfluorooctanoic acid	335-67-1	0.002	n.d.	n.d.
Perfluorooctane Sulphonate	1763-23-1	0.002	n.d.	n.d.
(PFOS)

The test method for short-chain chlorinated paraffins is performed as specified in ISO 18219:2015 (modified). The results from the upper portion M1 and the lower portion M2 are shown in Table 11. Remark:-n.d.=not detected.

TABLE 11
	Report
	Limit	Result (mg/Kg)
Compounds	CAS No.		M1	M2
Short-chain Chlorinated	85535-84-8	50	n.d.	n.d.
Paraffins (SCCP)
indicates data missing or illegible when filed

Referring to Table 1 to Table 11, no toxic substances, such as alkylphenol & alkylphenolethoxylate, banned azo dyes, chlorobenzene and chlorotoluene, chlorophenols, chlorinated solvents, flame retardant, heavy metals, organotin compounds, phthalates, perfluorooctanesulfonates & perfluorooctanoic acid, and shot-chain chlorinated paraffins, are detected on both the upper portion and lower portion of the non-toxin adhesiveless slipper in the present invention. Therefore, the non-toxin adhesiveless slipper of the present invention is an eco-friendly slipper, which fulfills th future environmental trends.

One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.

It will thus be seen that the objects of the present invention have been fully and effectively accomplished. The embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.

Claims

1. A non-toxin adhesiveless slipper, comprising:

an upper portion and a lower portion; wherein

said upper portion and said lower portion are bonded with each other by an adhesive film.

2. The non-toxin adhesiveless slipper, as recited in claim 1, wherein said lower portion are natural rubbers and ethylene propylene rubbers.

3. The non-toxin adhesiveless slipper, as recited in claim 1, wherein raw materials of said lower portion comprises natural rubber, ethylene propylene rubbers, white mineral oil, white carbon, polypropylene, starch-filled substance, vulcanization accelerator, and stearic acid.

4. The non-toxin adhesiveless slipper, as recited in claim 3, wherein the weight ratio of the natural rubber, ethylene propylene rubbers, white mineral oil, white carbon, polypropylene, starch-filled substance, vulcanization accelerator, and stearic acid is 40:33:17:5:5-15:6-15:2-5:3.

5. The non-toxin adhesiveless slipper, as recited in claim 1, wherein said lower portion can be made of synthetic rubber.

6. The non-toxin adhesiveless slipper, as recited in claim 1, wherein said lower portion can be made of thermoplastic polyolenfin.

7. The non-toxin adhesiveless slipper, as recited in claim 6, wherein said thermoplastic polyolenfin comprises ethylene propylene, white mineral oil, and isoprene, wherein the weight ratio of the ethylene propylene, white mineral oil, and isoprene is 33-37:14-17:46-53.

8. The non-toxin adhesiveless slipper, as recited in claim 1, wherein said upper portion of are made of EVA components.

9. The non-toxin adhesiveless slipper, as recited in claim 8, wherein said EVA components comprises EVA, polyoxyethylene, filling agent, natural particles, cross-linking agent, zinc oxide, foaming agent, and stearic acid, wherein the weight ratio of EVA, polyoxyethylene, filling agent, natural particles, cross-linking agent, zinc oxide, foaming agent, and stearic acid is 10-20:30-40:10-15:30-40:0.5-5.5:2.0-3.0:0.8-5.8:10-20.

10. The non-toxin adhesiveless slipper, as recited in claim 1, wherein said adhesive film is a compound film made of EAA(ethylene acrylic acid) and EVA (ethylene-vinyl acetate), and the weight ratio of EAA and EVA is 80-86:14-20.

11. The non-toxin adhesiveless slipper, as recited in claim 1, wherein said adhesive film can be a composite PE film, wherein said composite PE film comprises low density polyethylene and linear and low density polyethylene.

12. A processing method for bonding an upper portion and a lower portion of a non-toxin adhesiveless slipper together, comprising steps of:

a. heat melting the EVA and the EAA to form a fluid compound, and blowing the fluid compound on a bottom surface of said upper portion to form an adhesive film;

b. placing an isolated paper on said adhesive film;

c. placing said upper portion into a heat-pressing machine for 16-20 seconds, and the temperature inside the heat-pressing machine is around 150° C. to 180° C., so as to ensure the adhesive film and isolated paper securely attached on the bottom surface of said upper portion;

d. placing a rubber sheet on a mold to process a heat pressing for 45-60 seconds, and a pressing temperature is around 150° C. to 180° C., and then removing the remaining rubber on the contours of said mold to form said lower portion;

e. placing said upper portion and said lower portion into a sectional die, and then processing the heat-pressing for 240-300 seconds, and the heat-pressing temperature is around 150° C. to 200° C.

13. The processing method, as recited in claim 12, wherein in said step a, said adhesive film is a porous film.

14. The processing method, as recited in claim 12, wherein in said step a, said adhesive film is a compound film made of EAA(ethylene acrylic acid) and EVA (ethylene-vinyl acetate), and the weight ratio of EAA and EVA is 80-86:14-20.

15. The processing method, as recited in claim 12, wherein in said step a, said adhesive film can be a composite PE film, wherein said composite PE film comprises low density polyethylene and linear and low density polyethylene.

16. The processing method, as recited in claim 12, wherein in said step a, said upper portion of are made of EVA components.

17. The processing method, as recited in claim 12, wherein in said step a, said EVA components comprises EVA, polyoxyethylene, filling agent, natural particles, cross-linking agent, zinc oxide, foaming agent, and stearic acid, wherein the weight ratio of EVA, polyoxyethylene, filling agent, natural particles, cross-linking agent, zinc oxide, foaming agent, and stearic acid is 10-20:30-40:10-15:30-40:0.5-5.5:2.0-3.0:0.8-5.8:10-20.

18. The processing method, as recited in claim 12, wherein in said step d, said rubber sheet are natural rubbers and ethylene propylene rubbers.

19. The processing method, as recited in claim 12, wherein in said step d, said rubber sheet comprises natural rubber, ethylene propylene rubbers, white mineral oil, white carbon, polypropylene, starch-filled substance, vulcanization accelerator, and stearic acid.

20. The processing method, as recited in claim 19, wherein the weight ratio of the natural rubber, ethylene propylene rubbers, white mineral oil, white carbon, polypropylene, starch-filled substance, vulcanization accelerator, and stearic acid is 40:33:17:5:5-15:6-15:2-5:3.

21. The processing method, as recited in claim 12, wherein in said step d, said rubber sheet can be made of synthetic rubber.

22. The processing method, as recited in claim 12, wherein in said step d, said rubber sheet can be made of thermoplastic polyolenfin.

23. The processing method, as recited in claim 22, wherein said thermoplastic polyolenfin comprises ethylene propylene, white mineral oil, and isoprene, wherein the weight ratio of the ethylene propylene, white mineral oil, and isoprene is 33-37:14-17:46-53.